WO2021049273A1 - Horizontal electric compressor - Google Patents

Horizontal electric compressor Download PDF

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Publication number
WO2021049273A1
WO2021049273A1 PCT/JP2020/031582 JP2020031582W WO2021049273A1 WO 2021049273 A1 WO2021049273 A1 WO 2021049273A1 JP 2020031582 W JP2020031582 W JP 2020031582W WO 2021049273 A1 WO2021049273 A1 WO 2021049273A1
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WO
WIPO (PCT)
Prior art keywords
chamber
rotating shaft
compression mechanism
storage chamber
electric compressor
Prior art date
Application number
PCT/JP2020/031582
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French (fr)
Japanese (ja)
Inventor
裕光 大野
隆久 戸部
和久 角田
芳夫 小和田
達也 大木
Original Assignee
サンデン・アドバンストテクノロジー株式会社
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Publication of WO2021049273A1 publication Critical patent/WO2021049273A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • the present invention relates to a horizontal electric compressor, and more particularly to a horizontal electric compressor that can be suitably used as a compressor installed in a moving body such as an automobile.
  • the horizontal rotary compressor described in Patent Document 1 is known as an example of this type of horizontal electric compressor.
  • the inside of the closed container is partitioned by a partition member into an oil storage space where the compression mechanism is located and a space on the motor side where the motor is located.
  • the horizontal rotary compressor is an oil supply passage including a center hole provided in the rotating shaft, an oil guide hole for communicating the center hole and each sliding portion of the compression mechanism portion, and an oil suction pipe. have.
  • the oil supply passage is configured to suck up the lubricating oil in the oil storage space and supply it to each sliding portion of the compression mechanism by utilizing the pressure difference between the oil storage space and the center hole. There is.
  • the oil storage space and the motor side space communicate with each other through an oil communication hole provided in the lower part of the partition member. Therefore, for example, when the horizontal rotary compressor is tilted in a direction in which the space on the motor side is lower than that on the space side of the oil storage portion, the lubricating oil may be biased toward the space on the motor side. Further, in the horizontal rotary compressor, the oil storage portion space and the motor side space are filled with high-pressure gas through the gas communication hole, and the rotation between the compression mechanism portion and the electric motor portion. The end of the spindle supporting the shaft on the motor side is located in the space on the motor side where the high-pressure gas compressed by the compression mechanism is discharged. For this reason, a pressure difference cannot be obtained between the center hole and the main bearing, sufficient lubrication cannot be performed on the main bearing, and galling or seizure may occur in the main bearing.
  • the present invention can secure a sufficient amount of lubricating oil on the compression mechanism side even when tilted, and lubricate the bearing portion of the rotating shaft located between the motor portion and the compression mechanism portion. It is an object of the present invention to provide a horizontal electric compressor that can be sufficiently performed.
  • a horizontal electric compressor has an electric motor unit that rotates a rotating shaft in a housing and a compression mechanism unit that is driven via the rotating shaft. Further, in the horizontal electric compressor, a bearing portion of the rotating shaft that rotatably supports the rotating shaft is provided between the electric motor portion and the compression mechanism portion.
  • the horizontal electric compressor is integrally provided in the housing, accommodates the first storage chamber for accommodating the electric motor portion and the compression mechanism portion, and has a pressure higher than the pressure in the first storage chamber.
  • a partition wall portion that partitions the inside of the housing into the second storage chamber, and an oil supply passage for supplying lubricating oil to the bearing portion, one end of which is located in the second storage chamber and the other end.
  • the side communicates with the first accommodating chamber via the bearing portion, and the lubricating oil is supplied to the bearing portion by utilizing the pressure difference between the second accommodating chamber and the first accommodating chamber. It has the oil supply passage.
  • FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a cross-sectional view of BB of FIG.
  • FIG. 3 is a cross-sectional view taken along the line CC of FIG.
  • FIG. 5 is a cross-sectional view taken along the line DD of FIG.
  • FIG. 5 is a cross-sectional view taken along the line EE of FIG. It is a figure which shows the flow of the refrigerant (gas) in the horizontal type electric compressor. It is a figure which shows the flow of the lubricating oil in the horizontal type electric compressor.
  • FIG. 1 is a cross-sectional view of a horizontal electric compressor according to an embodiment of the present invention.
  • the horizontal electric compressor (hereinafter, simply referred to as “electric compressor”) 100 has a housing 110.
  • the housing 110 has a cylindrical center housing 110a, a bottomed cylindrical front housing 110b whose open end side is joined to the front end (left end in FIG. 1) of the center housing 110a, and a rear end (open end side) of the center housing 110a (the open end side). Includes a bottomed cylindrical rear housing 110c joined to the right end in FIG. 1).
  • the inside of the housing 110 is divided into a first storage chamber 113 on the front housing 110b side and a second storage chamber 115 on the rear housing 110c side by a partition wall portion 111 integrally provided in the center housing 110a.
  • the first accommodation chamber 113 is formed by the center housing 110a and the front housing 110b
  • the second accommodation chamber 115 is formed by the center housing 110a and the rear housing 110c.
  • the partition wall portion 111 is integrally formed with the center housing 110a by, for example, casting. However, it is not limited to this.
  • the partition wall portion 111 may be integrated with the center housing 110a.
  • the partition wall portion 111 may be integrated with the center housing 110a by welding, or may be integrated with the center housing 110a by a joining technique other than welding.
  • a boss portion 111a projecting toward the first storage chamber 113 is formed at the radial center portion of the partition wall portion 111. Further, the partition wall portion 111 is formed with a first shaft hole 111b that penetrates from the tip surface of the boss portion 111a to the surface on the second accommodation chamber 115 side.
  • An intermediate portion of the rotating shaft 200 extending in the horizontal direction (front-back direction) is rotatably inserted into the first shaft hole 111b.
  • One end (front end) side of the rotating shaft 200 is located in the first accommodating chamber 113, and the other end (rear end) side of the rotating shaft 200 is located in the second accommodating chamber 115.
  • a minute gap (clearance) CL is formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200.
  • the minute gap CL is set so that the rotating shaft 200 can rotate and can be sealed by the lubricating oil O described later.
  • the electric motor unit 10 for rotating the rotating shaft 200 is housed in the first storage chamber 113. Further, the first accommodation chamber 113 communicates with the low pressure side of an external refrigerant circuit (not shown) via a suction port 117 formed in the front housing 110b.
  • the suction port 117 is located at a position opposite to the partition wall portion 111 across the electric motor portion 10 in the axial direction of the rotating shaft 200, and at a position corresponding to the rotating shaft 200 in the height (upper and lower) direction (that is, the rotating shaft). It is provided at a position (at almost the same height as 200).
  • the electric motor unit 10 includes a stator 11 and a rotor 12.
  • the stator 11 is fixed to the inner peripheral surface of the housing 110. Specifically, the stator 11 is fixed to the inner peripheral surface of a portion of the center housing 110a on the front housing 110b side of the partition wall portion 111.
  • the stator 11 has a stator core 11a formed of a magnetic material in a cylindrical shape, and a stator coil 11b wound around the stator core 11a (the teeth portion) by, for example, concentrated winding.
  • the rotor 12 is arranged with a predetermined gap inside the stator 11 in the radial direction.
  • a permanent magnet is incorporated in the rotor 12.
  • the rotor 12 is formed in a cylindrical shape, and is fixed to the rotating shaft 200 with the front end side of the rotating shaft 200 inserted through the hollow portion thereof.
  • the rotor 12 is rotated by supplying electric power to the stator 11 (stator coil 11b) via the airtight terminal portion 20 provided in the front housing 110b, whereby the rotating shaft 200 is rotated. It is configured in.
  • the second accommodating chamber 115 accommodates the compression mechanism unit 30 driven via the rotating shaft 200.
  • the compression mechanism unit 30 is configured as a rotary compressor. However, the present invention is not limited to this, and the compression mechanism unit 30 may be configured as a compressor other than the rotary compressor.
  • the second storage chamber 115 communicates with the high pressure side of the external refrigerant circuit via a discharge port 119 formed in the rear housing 110c.
  • the discharge port 119 is provided at a position on the partition wall 111 side of the discharge hole 53 described later in the axial direction of the rotary shaft 200, and at a position corresponding to the rotary shaft 200 in the height direction like the suction port 117. There is.
  • the bottom of the second storage chamber 115 constitutes a lubricating oil storage portion in which the lubricating oil O is stored.
  • the lubricating oil O is mainly stored in the second storage chamber 115, and is hardly stored in the first storage chamber 113.
  • the compression mechanism portion 30 has an outer diameter smaller than the inner diameter of the housing 110. Further, the lower portion of the compression mechanism portion 30 is immersed in the lubricating oil O (that is, it is located below the oil level of the lubricating oil O).
  • the compression mechanism unit 30 includes a first compression mechanism unit 30A and a second compression mechanism unit 30B arranged on both sides of the intermediate partition plate 40.
  • the first compression mechanism portion 30A is arranged on the partition wall portion 111 side (that is, the front side) of the intermediate partition plate 40
  • the second compression mechanism portion 30B is on the side opposite to the partition wall portion 111 side of the intermediate partition plate 40 (that is, the front side). That is, it is arranged on the rear side).
  • An insertion hole through which the rotating shaft 200 is inserted is formed in the radial center portion of the intermediate partition plate 40.
  • FIG. 2 is an enlarged view of a main part of FIG. 1, and mainly shows a compression mechanism part 30.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 and mainly shows the configuration of the first compression mechanism portion 30A.
  • FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, and the configuration is mainly shown in the second compression mechanism portion 30B.
  • the first compression mechanism unit 30A includes a first cylinder 31A, a first eccentric roller 33A, and a first vane 35A.
  • the first cylinder 31A has a first cylinder chamber 37A having a circular cross section at the center in the radial direction.
  • the first eccentric roller 33A is attached to the first eccentric portion 201 of the rotating shaft 200 located in the first cylinder chamber 37A of the first cylinder 31A.
  • the first eccentric roller 33A eccentrically rotates in the first cylinder chamber 37A of the first cylinder 31A as the rotating shaft 200 rotates.
  • the first vane 35A is urged toward the first eccentric roller 33A by the first urging member (coil spring) 39A.
  • the first vane 35A abuts on the outer peripheral surface of the first eccentric roller 33A and divides the inside of the first cylinder chamber 37A into a low pressure chamber where the first suction port 41A is located and a high pressure chamber where the first discharge port 43A is located. (See FIG. 3).
  • the first suction port 41A and the first discharge port 43A are provided below the rotating shaft 200.
  • a first recess 111c is formed on the surface of the partition wall 111 on the side of the first storage chamber 113 so as to surround the boss portion 111a. Then, the opening of the first recess 111c is closed by the first closing plate 121 which is in close contact with the surface of the partition wall 111 on the side of the first storage chamber 113, whereby the first discharge sound deadening partitioned from the first storage chamber 113 is closed.
  • a chamber 45A is formed. That is, in the present embodiment, the partition wall portion 111 is provided with the first discharge muffling chamber 45A.
  • the first discharge muffling chamber 45A is a first discharge port 43A located in a high pressure chamber in the first cylinder chamber 37A of the first cylinder 31A through the first communication hole 111d formed in the partition wall portion 111 (see FIG. 3). ).
  • the second compression mechanism unit 30B has the same configuration as the first compression mechanism unit 30A. That is, the second compression mechanism unit 30B includes a second cylinder 31B, a second eccentric roller 33B, and a second vane 35B.
  • the second cylinder 31B has a second cylinder chamber 37B having a circular cross section at the center in the radial direction.
  • the second eccentric roller 33B is attached to the second eccentric portion 202 of the rotating shaft 200 located in the second cylinder chamber 37B of the second cylinder 31B.
  • the second eccentric roller 33B eccentrically rotates in the second cylinder chamber 37B of the second cylinder 31B as the rotating shaft 200 rotates.
  • the second eccentric portion 202 is provided on the rotating shaft 200 with a phase difference of about 180 ° (with a phase difference of about 180 °) with respect to the first eccentric portion 201.
  • the second vane 35B is urged toward the second eccentric roller 33B by the second urging member (coil spring) 39B.
  • the second vane 35B abuts on the outer peripheral surface of the second eccentric roller 33B and divides the inside of the second cylinder chamber 37B into a low pressure chamber where the second suction port 41B is located and a high pressure chamber where the second discharge port 43B is located. (See FIG. 4).
  • the second suction port 41B and the second discharge port 43B are provided below the rotation shaft 200, like the first suction port 41A and the first discharge port 43A.
  • a second shaft hole 47a is formed in the radial center portion of the discharge muffling chamber forming member 47.
  • the rear end portion of the rotating shaft 200 and its vicinity are rotatably inserted into the second shaft hole 47a. That is, the rotary shaft 200 is rotatably supported by the first shaft hole 111b formed in the partition wall 111 and the second shaft hole 47a formed in the discharge muffling chamber forming member 47, and these first shaft holes are rotatably supported.
  • 111b and the second shaft hole 47a each form a bearing portion of the rotating shaft 200.
  • a minute gap is formed between the inner peripheral surface of the second shaft hole 47a and the outer peripheral surface of the rotating shaft 200.
  • a second recess 47b is formed on the surface of the discharge sound deadening chamber forming member 47 opposite to the second cylinder 31B side (that is, the rear surface) so as to surround the second shaft hole 47a. ..
  • the second discharge muffling chamber 45B is formed by closing the second recess 47b with the second closing plate 49 which is in close contact with the surface of the discharge muffling chamber forming member 47 on the side opposite to the second cylinder 31B. ..
  • the second discharge muffling chamber 45B is connected to the second discharge port 43B located in the high pressure chamber in the second cylinder chamber 37B of the second cylinder 31B via the second communication hole 47c formed in the discharge muffling chamber forming member 47. Communicating.
  • the first closing plate 121, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, the discharge sound deadening chamber forming member 47, and the second closing plate 49 are a plurality of fastening members (for example, through). It is fastened by a bolt) 60 and fixed to the partition wall 111.
  • the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) is attached to and fixed to the partition wall portion 111.
  • FIG. 5 is a sectional view taken along the line CC of FIG. 3
  • FIG. 6 is a sectional view taken along the line DD of FIG. 5
  • FIG. 7 is a sectional view taken along the line EE of FIG.
  • the first discharge muffling chamber 45A and the second discharge muffling chamber 45B communicate with each other via a discharge communication passage 51 provided above the rotating shaft 200.
  • the discharge communication passage 51 forms the bottom wall portion of the first recess 111c forming the first discharge muffling chamber 45A, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, and the second discharge muffling chamber 45B. It is formed as a passage extending horizontally through the bottom wall portion of the second recess 47b.
  • the second discharge muffling chamber 45B communicates with the second accommodation chamber 115 via a discharge hole 53 formed in the second closing plate 49 (see FIGS. 5 and 6).
  • the first suction passage 55 extends from the first suction port 41A in the first cylinder 31A downward in the circumferential direction, and then horizontally extends in the vicinity of the bottom portion in the housing 110 in the partition wall portion 111 and the first closing plate 121. Is formed as a passage leading to the first accommodation chamber 113 (see FIGS. 2, 3, 5, and 7).
  • the opening end portion (entrance side end portion) 55a of the first suction passage 55 that opens to the first accommodation chamber 113 is located vertically below the first shaft hole 111b (see FIG. 7).
  • the second suction port 41B located in the low pressure chamber in the second cylinder chamber 37B of the second cylinder 31B extends from the second suction port 41B in the second cylinder 31B downward in the circumferential direction and then horizontally as an intermediate partition plate 40.
  • each slide of the bearing portion (first shaft hole 111b, second shaft hole 47a) and the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) of the rotating shaft 200 It has an oil supply passage 70 for supplying lubricating oil to the moving portion.
  • the oil supply passage 70 includes a first oil passage 71 formed inside the second closing plate 49, and a second oil passage 72 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. Includes first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200 (see FIGS. 1, 2 and 6).
  • the first oil passage 71 opens to the bottom of the second closing plate 49 and extends upward, and then bends toward the rear end surface of the rotating shaft 200, and the other end (upper end) is the second shaft hole. It is formed as a passage that opens in 47a.
  • the first oil passage 71 has a vertical hole extending vertically from the bottom of the second closing plate 49 to a position corresponding to the rotation shaft 200, and a discharge muffling chamber of the second closing plate 49. It is composed of a horizontal hole extending horizontally from a portion of the surface on the member 47 side corresponding to the second shaft hole 47a and connecting to the vertical hole.
  • the one end (lower end) of the first oil passage 71 that is, the opening of the vertical hole is the lubricating oil stored in the vicinity of the bottom of the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115. It is located below the liquid level of O and functions as an oil suction port.
  • One end of the second oil passage 72 opens to the rear end surface of the rotating shaft 200, and the position inside the rotating shaft 200 exceeds the first cylinder 31A along the axis of the rotating shaft 200 (in other words, the first shaft hole). It extends to a position corresponding to the inside of 111b) and the other end is closed.
  • the one end of the second oil passage 72 is connected to the other end (upper end) of the first oil passage 71, and the first oil passage 71 and the second oil passage 72 form one passage.
  • the second oil passage 72 corresponds to the "passage in the rotating shaft" of the present invention.
  • One end of the first oil guide hole 73 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the second shaft hole 47a.
  • the other end of the first oil guide hole 73 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the second cylinder 31B in the second shaft hole 47a.
  • the first oil guide hole 73 communicates with the second oil passage 72 and a minute gap formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the second shaft hole 47a.
  • the portion where the other end of the first oil guide hole 73 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir.
  • One end of the second oil guide hole 74 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the second eccentric portion 202 of the rotating shaft 200.
  • the portion where the other end of the second oil guide hole 74 opens is a flat surface, and the outer peripheral surface of the second eccentric portion 202 and the second eccentric roller 33B A minute gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the second oil guide hole 74 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the second eccentric portion 202 and the inner peripheral surface of the second eccentric roller 33B.
  • One end of the third oil guide hole 75 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the first eccentric portion 201 of the rotating shaft 200.
  • the portion of the outer peripheral surface of the first eccentric portion 201 where the other end of the third oil guide hole 75 opens is a flat surface, and the first eccentric roller 33A A slight gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the third oil guide hole 75 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the first eccentric portion 201 and the inner peripheral surface of the first eccentric roller 33A.
  • One end of the fourth oil guide hole 76 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the first shaft hole 111b.
  • the other end of the fourth oil guide hole 76 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the first cylinder 31A in the first shaft hole 111b.
  • the fourth oil guide hole 76 communicates the second oil passage 72 with the minute gap CL formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the first shaft hole 111b. ing.
  • the portion where the other end of the fourth oil guide hole 76 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir.
  • the fourth oil guide hole 76 corresponds to the "communication hole" of the present invention.
  • FIG. 8 shows the flow of the refrigerant (gas) in the electric compressor 100
  • FIG. 9 shows the flow of the lubricating oil O in the electric compressor 100.
  • the low-pressure side refrigerant (low-pressure refrigerant) of the external refrigerant circuit flows into the first storage chamber 113 that houses the electric motor unit 10 through the suction port 117 formed in the front housing 110b. That is, the first storage chamber 113 constitutes a "suction chamber" in which the low-pressure refrigerant flows in from the outside, and the pressure of the first storage chamber 113 is substantially the same as the pressure on the low-pressure side of the external refrigerant circuit.
  • the rotating shaft 200 rotates, the first eccentric roller 33A rotates eccentrically in the first cylinder chamber 37A of the first compression mechanism unit 30A, and the second cylinder of the second compression mechanism unit 30B. In the chamber 37B, the second eccentric roller 33B rotates eccentrically.
  • the low-pressure refrigerant that has flowed into the first storage chamber 113 from the suction port 117 passes through the gap between the stator 11 and the rotor 12 in the electric motor unit 10, whereby the electric motor unit 10 is moved. It is cooled. Then, the low-pressure refrigerant that has passed through the first suction passage 55 and the first suction port 41A (see FIG. 3) is sucked into the first cylinder chamber 37A from the first storage chamber 113, and the first suction passage 55 is sucked from the first storage chamber 113. , The low-pressure refrigerant that has passed through the second suction passage 56 and the second suction port 41B is sucked into the second cylinder chamber 37B. At this time, the lubricating oil O stored in the bottom of the first storage chamber 113 is also sucked into the first cylinder chamber 37A and the second cylinder chamber 37B together with the low-pressure refrigerant (see FIG. 9).
  • the low-pressure refrigerant sucked into the first cylinder chamber 37A is compressed in the first cylinder chamber 37A by the eccentric rotation of the first eccentric roller 33A to become a high-pressure refrigerant.
  • the high-pressure refrigerant is discharged from the first cylinder chamber 37A to the first discharge muffling chamber 45A through the first discharge port 43A (see FIG. 3) and the first communication hole 111d, as indicated by the arrows opened in FIG. After that, it passes through the discharge communication passage 51 and flows into the second discharge muffling chamber 45B.
  • the low-pressure refrigerant that has flowed into the second cylinder chamber 37B is compressed in the second cylinder chamber 37B by the eccentric rotation of the second eccentric roller 33B to become a high-pressure refrigerant, and the high-pressure refrigerant is discharged from the second cylinder chamber 37B to the second discharge port 43B ( (See FIG. 4) and the second discharge muffling chamber 45B is discharged through the second communication hole 47c.
  • the second storage chamber 115 constitutes a "discharge chamber" in which the high-pressure refrigerant compressed by the compression mechanism unit 30 is discharged, and the pressure of the second storage chamber 115 is the pressure of the high-pressure refrigerant (the external refrigerant). It is almost the same as the pressure on the high voltage side of the circuit (higher than the pressure in the first accommodation chamber 113).
  • the high-pressure refrigerant discharged into the second storage chamber 115 contacts and / or collides with the inner surface of the housing 110 or the like, whereby the lubricating oil O contained therein is separated from the high-pressure refrigerant.
  • the lubricating oil O separated from the high-pressure refrigerant moves downward mainly by gravity and is stored in the bottom of the second storage chamber 115.
  • the high-pressure refrigerant after the lubricating oil O is separated flows out to the high-pressure side of the external refrigerant circuit through the discharge port 119 formed in the rear housing 110c.
  • the oil supply passage 70 has a first oil passage 71 formed inside the second closing plate 49 and a second oil passage 71 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. It includes an oil passage 72 and first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200.
  • One end (lower end) of the first oil passage 71 constituting one end of the oil supply passage 70 is a lubricating oil O stored in the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115.
  • the fourth oil guide hole 76 forming the other end of the oil supply passage 70 is more specifically formed on the outer peripheral surface of the rotating shaft 200 and the first shaft hole 111b via the first shaft hole 111b. It communicates with the first storage chamber 113 via a minute gap CL formed between the inner peripheral surface and the inner peripheral surface.
  • the first storage chamber 113 constitutes a low-pressure chamber whose pressure is equivalent to that of the low-pressure refrigerant
  • the second storage chamber 115 constitutes a high-pressure chamber whose pressure is equivalent to that of the high-pressure refrigerant.
  • the pressure difference between the second accommodation chamber (discharge chamber (high pressure chamber)) 115 and the first accommodation chamber (suction chamber (low pressure chamber)) 113 causes the second accommodation chamber.
  • the lubricating oil O stored in the bottom of the 115 is sucked up through the first oil passage 71 and guided to the second oil passage 72.
  • the lubricating oil O guided to the second oil passage 72 passes through the fourth oil guide hole 76 to the first shaft hole 111b (bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Is supplied to.
  • the lubricating oil O supplied to the first shaft hole 111b passes through the minute gap CL formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200 and enters the first storage chamber 113. leak.
  • the lubricating oil O that has flowed out to the first storage chamber 113 subsequently falls and is stored in the bottom of the first storage chamber 113, or is the first of the first compression mechanism unit 30A together with the low-pressure refrigerant in the first storage chamber 113. It is sucked into the second cylinder chamber 37B of the cylinder chamber 37A and the second compression mechanism unit 30B.
  • the lubricating oil O guided to the second oil passage 72 is supplied to the second shaft hole 47a (bearing portion of the rotating shaft 200 on the rear end side) via the first oil guide hole 73.
  • the lubricating oil O guided to the second oil passage 72 is guided to the inside of the second eccentric roller 33B through the second oil guide hole 74, and from there to each sliding portion of the second compression mechanism portion 30B. Supplied.
  • the lubricating oil O guided to the second oil passage 72 is guided to the inside of the first eccentric roller 33A through the third oil guide hole 75, and from there, each sliding portion of the first compression mechanism portion 30A. Is supplied to.
  • the inside of the housing 110 is divided into a first storage chamber 113 for accommodating the electric motor unit 10 and a second storage chamber 115 for accommodating the compression mechanism unit 30 by the partition wall portion 111.
  • the bottom of the second accommodating chamber 115 constitutes a lubricating oil storage portion for accommodating the lubricating oil O, and the lubricating oil O is placed between the first accommodating chamber 113 and the second accommodating chamber 115 in the partition wall portion 111.
  • the lubricating oil O hardly flows from the second storage chamber 115 into the first storage chamber 113, and a sufficient amount of the lubricating oil O is provided on the compression mechanism portion 30 side. Can be secured. Further, since there is almost no lubricating oil O that is agitated by the rotation of the electric motor unit 10, the amount of lubricating oil that flows out from the electric compressor 100 to the external refrigerant circuit together with the high-pressure refrigerant is also significantly reduced. Therefore, the lubricity and sealing property of the compression mechanism portion 30 can be ensured with a smaller amount of lubricating oil than in the past.
  • the partition wall portion 111 is integrally formed (provided) with the housing 110 (center housing 110a) by, for example, casting or welding. Therefore, it is not necessary to mount the partition wall 111 in the housing 110 when manufacturing the electric compressor 100, and the compression mechanism section 30 is stably and accurately mounted in the housing 110 by using the partition wall 111. It is also possible. Therefore, good assembly workability of the electric compressor 100 can be obtained.
  • the pressure of the second accommodation chamber 115 is higher than the pressure of the first accommodation chamber 113, and the oil supply passage 70 uses the pressure difference between the second accommodation chamber 115 and the first accommodation chamber 113 to perform the second accommodation. It is configured to suck up the lubricating oil O stored in the chamber 115 and supply it to the first shaft hole 111b (the bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Therefore, during the operation of the electric compressor 100, lubrication to the first shaft hole 111b can be performed stably and reliably.
  • the first accommodation chamber 113 is configured as a suction chamber (low pressure chamber) in which a low-pressure refrigerant from the outside flows in through the suction port 117
  • the second accommodation chamber 115 is a compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) in which the compressed high-pressure refrigerant is discharged. Therefore, the pressure difference becomes larger, and the first shaft hole 111b can be sufficiently refueled.
  • the suction passage (first suction) that guides the low-pressure refrigerant in the first storage chamber 113 to the compression mechanism section 30 (first compression mechanism section 30A, second compression mechanism section 30B).
  • the passage 55 and the second suction passage 56) are arranged below the rotation shaft 200. Therefore, the lubricating oil O stored in the bottom of the first storage chamber 113 can be sucked into the compression mechanism unit 30 together with the low-pressure refrigerant. Therefore, it is possible to prevent the lubricating oil O from staying in (the bottom portion of) the first storage chamber 113, and to secure a sufficient amount of the lubricating oil O on the compression mechanism portion 30 side.
  • the open end portion of the suction passage (open end portion 55a of the first suction passage 55) that opens into the first storage chamber 113 is located vertically below the first shaft hole 111b. Therefore, the lubricating oil O that has fallen after passing through the first shaft hole 111b and flowing into the first storage chamber 113 can be quickly sucked into the compression mechanism unit 30.
  • the suction port 117 is provided on the opposite side of the partition wall portion 111 with the electric motor portion 10 interposed therebetween and at a height position corresponding to the rotation shaft 200. Therefore, the low-pressure refrigerant flowing from the suction port 117 into the first storage chamber 113 can be used in a well-balanced manner for cooling the electric motor unit 10 and suppressing the retention of the lubricating oil O in the first storage chamber 113.
  • the outer peripheral surface of the rotating shaft 200 and the outer peripheral surface of the rotating shaft 200 are located on the inner peripheral surface of the first shaft hole 111b or on the outer peripheral surface of the rotating shaft 200 located in the first shaft hole 111b.
  • a spiral groove may be formed to move the lubricating oil O located between the inner peripheral surface and the lubricating oil O from the first storage chamber 113 side to the second storage chamber 115 side.
  • the first storage chamber 113 is configured as a suction chamber (low pressure chamber) into which the low pressure refrigerant flows from the outside, and the second storage chamber 115 contains the high pressure refrigerant compressed by the compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) for discharge.
  • the pressure is not limited to this, and the pressure in the second storage chamber 115 may be higher than the pressure in the first storage chamber 113.
  • front housing, 110c ... rear housing, 111 ... partition wall portion, 111a ... boss portion, 111b ... first shaft hole (bearing portion), 113 ... first accommodation chamber, 115 ... second accommodation chamber 117 ... suction port , 119 ... Discharge port, 200 ... Rotating shaft, CL ... Micro gap, O ... Lubricating oil

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

Provided is a horizontal electric compressor that, even when tilted or the like, can secure a sufficient amount of lubricating oil for a compression mechanism unit and supply enough oil to a bearing of a rotary shaft positioned between the compression mechanism unit and an electric motor unit. The horizontal electric compressor has: a partitioning wall (111) that is provided integrally with a housing (110) to divide the inside of the housing (110) into a first accommodation chamber (113) and a second accommodation chamber (115), the first accommodation chamber accommodating an electric motor unit (10) that rotates a rotary shaft (200) and the second accommodation chamber accommodating a compression mechanism unit (30) driven by the rotary shaft (200) and having a higher pressure than the first accommodation chamber (113); and an oil supply passage (70) configured to utilize the pressure difference between the second accommodation chamber (115) and the first accommodation chamber (113) to supply lubricating oil O stored in the second accommodation chamber (115) to a first shaft hole (111b), which is a bearing of the rotary shaft (200) and is positioned between the electric motor unit (10) and the compression mechanism unit (30).

Description

横置型電動圧縮機Horizontal electric compressor
　本発明は、横置型電動圧縮機に関し、特に、自動車などの移動体に設置される圧縮機として好適に用いられ得る横置型電動圧縮機に関する。 The present invention relates to a horizontal electric compressor, and more particularly to a horizontal electric compressor that can be suitably used as a compressor installed in a moving body such as an automobile.
　この種の横置型電動圧縮機の一例として特許文献１に記載された横形ロータリ圧縮機が知られている。前記横形ロータリ圧縮機において、密閉容器内は仕切り部材によって圧縮機構部が位置する油貯留部空間と電動機部が位置する電動機側空間とに仕切られている。また、前記横形ロータリ圧縮機は、回転軸に設けられたセンター孔と、前記センター孔と前記圧縮機構部の各摺動部とを連通する油案内孔と、油吸い上げ管と、からなる給油路を有している。前記給油路は、前記油貯留部空間と前記センター孔との圧力差を利用して前記油貯留部空間の潤滑油を吸い上げて前記圧縮機構部の各摺動部に供給するように構成されている。 The horizontal rotary compressor described in Patent Document 1 is known as an example of this type of horizontal electric compressor. In the horizontal rotary compressor, the inside of the closed container is partitioned by a partition member into an oil storage space where the compression mechanism is located and a space on the motor side where the motor is located. Further, the horizontal rotary compressor is an oil supply passage including a center hole provided in the rotating shaft, an oil guide hole for communicating the center hole and each sliding portion of the compression mechanism portion, and an oil suction pipe. have. The oil supply passage is configured to suck up the lubricating oil in the oil storage space and supply it to each sliding portion of the compression mechanism by utilizing the pressure difference between the oil storage space and the center hole. There is.
特開２００４－６０５３３号公報Japanese Unexamined Patent Publication No. 2004-60533
　しかし、前記横形ロータリ圧縮機においては、前記油貯留部空間と前記電動機側空間とは前記仕切り部材の下部に設けられた油連通孔を介して連通している。このため、例えば前記油貯留部空間側よりも前記電動機側空間が低くなる方向に前記横形ロータリ圧縮機が傾斜した場合、前記潤滑油が前記電動機側空間に偏ってしまうおそれがある。また、前記横形ロータリ圧縮機において、前記油貯留部空間と前記電動機側空間とは前記ガス連通孔を介して高圧ガスで満たされており、前記圧縮機構部と前記電動機部との間で前記回転軸を支持する主軸受けの前記電動機部側の端部は、前記圧縮機構部で圧縮された高圧ガスが放出される前記電動機側空間内に位置している。このため、前記センター孔と前記主軸受けとの間に圧力差が得られず、前記主軸受けに十分な給油が行えなくなり、前記主軸受けにおいてかじりや焼き付きが生じるおそれもある。 However, in the horizontal rotary compressor, the oil storage space and the motor side space communicate with each other through an oil communication hole provided in the lower part of the partition member. Therefore, for example, when the horizontal rotary compressor is tilted in a direction in which the space on the motor side is lower than that on the space side of the oil storage portion, the lubricating oil may be biased toward the space on the motor side. Further, in the horizontal rotary compressor, the oil storage portion space and the motor side space are filled with high-pressure gas through the gas communication hole, and the rotation between the compression mechanism portion and the electric motor portion. The end of the spindle supporting the shaft on the motor side is located in the space on the motor side where the high-pressure gas compressed by the compression mechanism is discharged. For this reason, a pressure difference cannot be obtained between the center hole and the main bearing, sufficient lubrication cannot be performed on the main bearing, and galling or seizure may occur in the main bearing.
　そこで、本発明は、傾斜時等においても圧縮機構部側に十分な量の潤滑油を確保することができると共に電動機部と圧縮機構部との間に位置する回転軸の軸受部への給油を十分に行うことができる横置型電動圧縮機を提供することを目的とする。 Therefore, the present invention can secure a sufficient amount of lubricating oil on the compression mechanism side even when tilted, and lubricate the bearing portion of the rotating shaft located between the motor portion and the compression mechanism portion. It is an object of the present invention to provide a horizontal electric compressor that can be sufficiently performed.
　本発明の一側面によると、横置型電動圧縮機が提供される。前記横置型電動圧縮機は、ハウジング内に回転軸を回転させる電動機部と前記回転軸を介して駆動される圧縮機構部とを有する。また、前記横置型電動圧縮機において、前記回転軸を回転自在に支持する前記回転軸の軸受部は、前記電動機部と前記圧縮機構部との間に設けられている。そして、前記横置型電動圧縮機は、前記ハウジングに一体に設けられ、前記電動機部を収容する第１収容室と前記圧縮機構部を収容すると共に前記第１収容室の圧力よりも高い圧力を有する第２収容室とに前記ハウジング内を区画する隔壁部と、前記軸受部に潤滑油を供給する油供給通路であって、一方の端部が前記第２収容室内に位置すると共に他方の端部側が前記軸受部を介して前記第１収容室に連通し、前記第２収容室と前記第１収容室との圧力差を利用して前記潤滑油を前記軸受部に供給するように構成された前記油供給通路と、を有する。 According to one aspect of the present invention, a horizontal electric compressor is provided. The horizontal electric compressor has an electric motor unit that rotates a rotating shaft in a housing and a compression mechanism unit that is driven via the rotating shaft. Further, in the horizontal electric compressor, a bearing portion of the rotating shaft that rotatably supports the rotating shaft is provided between the electric motor portion and the compression mechanism portion. The horizontal electric compressor is integrally provided in the housing, accommodates the first storage chamber for accommodating the electric motor portion and the compression mechanism portion, and has a pressure higher than the pressure in the first storage chamber. A partition wall portion that partitions the inside of the housing into the second storage chamber, and an oil supply passage for supplying lubricating oil to the bearing portion, one end of which is located in the second storage chamber and the other end. The side communicates with the first accommodating chamber via the bearing portion, and the lubricating oil is supplied to the bearing portion by utilizing the pressure difference between the second accommodating chamber and the first accommodating chamber. It has the oil supply passage.
　本発明の一側面によれば、傾斜時等においても圧縮機構部側に十分な量の潤滑油を確保することができると共に電動機部と圧縮機構部との間に位置する回転軸の軸受部への給油を十分に行うことができる横置型電動圧縮機を提供することができる。 According to one aspect of the present invention, it is possible to secure a sufficient amount of lubricating oil on the compression mechanism side even when tilted, and to the bearing portion of the rotating shaft located between the motor portion and the compression mechanism portion. It is possible to provide a horizontal electric compressor capable of sufficiently refueling.
本発明の一実施形態に係る横置型電動圧縮機の断面図Sectional drawing of horizontal electric compressor which concerns on one Embodiment of this invention 図１の要部拡大図である。It is an enlarged view of the main part of FIG. 図１のＡ－Ａ断面図である。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 図１のＢ－Ｂ断面図である。It is a cross-sectional view of BB of FIG. 図３のＣ－Ｃ断面図である。FIG. 3 is a cross-sectional view taken along the line CC of FIG. 図５のＤ－Ｄ断面図である。FIG. 5 is a cross-sectional view taken along the line DD of FIG. 図１のＥ－Ｅ断面図である。FIG. 5 is a cross-sectional view taken along the line EE of FIG. 前記横置型電動圧縮機における冷媒（ガス）の流れを示す図である。It is a figure which shows the flow of the refrigerant (gas) in the horizontal type electric compressor. 前記横置型電動圧縮機における潤滑油の流れを示す図である。It is a figure which shows the flow of the lubricating oil in the horizontal type electric compressor.
　以下、本発明の実施の形態を添付図面に基づいて説明する。
　図１は、本発明の一実施形態に係る横置型電動圧縮機の断面図である。実施形態に係る横置型電動圧縮機（以下単に「電動圧縮機」という）１００は、ハウジング１１０を有している。ハウジング１１０は、円筒状のセンターハウジング１１０ａと、開口端側がセンターハウジング１１０ａの前端（図１における左端）に接合された有底円筒状のフロントハウジング１１０ｂと、開口端側がセンターハウジング１１０ａの後端（図１における右端）に接合された有底円筒状のリアハウジング１１０ｃと、を含む。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a horizontal electric compressor according to an embodiment of the present invention. The horizontal electric compressor (hereinafter, simply referred to as “electric compressor”) 100 according to the embodiment has a housing 110. The housing 110 has a cylindrical center housing 110a, a bottomed cylindrical front housing 110b whose open end side is joined to the front end (left end in FIG. 1) of the center housing 110a, and a rear end (open end side) of the center housing 110a (the open end side). Includes a bottomed cylindrical rear housing 110c joined to the right end in FIG. 1).
　ハウジング１１０内は、センターハウジング１１０ａに一体に設けられた隔壁部１１１によって、フロントハウジング１１０ｂ側の第１収容室１１３とリアハウジング１１０ｃ側の第２収容室１１５とに区画されている。第１収容室１１３は、センターハウジング１１０ａとフロントハウジング１１０ｂとによって形成され、第２収容室１１５は、センターハウジング１１０ａとリアハウジング１１０ｃとによって形成されている。 The inside of the housing 110 is divided into a first storage chamber 113 on the front housing 110b side and a second storage chamber 115 on the rear housing 110c side by a partition wall portion 111 integrally provided in the center housing 110a. The first accommodation chamber 113 is formed by the center housing 110a and the front housing 110b, and the second accommodation chamber 115 is formed by the center housing 110a and the rear housing 110c.
　本実施形態において、隔壁部１１１は、例えば、鋳造によってセンターハウジング１１０ａと一体に成形されている。しかし、これに限られるものではない。隔壁部１１１は、センターハウジング１１０ａと一体化されていればよい。例えば、隔壁部１１１は、溶接によってセンターハウジング１１０ａに一体化されてもよいし、溶接以外の接合技術によってセンターハウジング１１０ａに一体化されてもよい。 In the present embodiment, the partition wall portion 111 is integrally formed with the center housing 110a by, for example, casting. However, it is not limited to this. The partition wall portion 111 may be integrated with the center housing 110a. For example, the partition wall portion 111 may be integrated with the center housing 110a by welding, or may be integrated with the center housing 110a by a joining technique other than welding.
　隔壁部１１１の径方向中央部には、第１収容室１１３側に突出するボス部１１１ａが形成されている。また、隔壁部１１１には、ボス部１１１ａの先端面から第２収容室１１５側の面まで貫通する第１軸孔１１１ｂが形成されている。 A boss portion 111a projecting toward the first storage chamber 113 is formed at the radial center portion of the partition wall portion 111. Further, the partition wall portion 111 is formed with a first shaft hole 111b that penetrates from the tip surface of the boss portion 111a to the surface on the second accommodation chamber 115 side.
　第１軸孔１１１ｂには、水平方向（前後方向）に延びる回転軸２００の中間部が回転自在に挿通されている。回転軸２００の一端（前端）側は第１収容室１１３内に位置し、回転軸２００の他端（後端）側は第２収容室１１５内に位置している。第１軸孔１１１ｂの内周面と回転軸２００の外周面との間には微小隙間（クリアランス）ＣＬが形成されている。この微小隙間ＣＬは、回転軸２００が回転可能であり、且つ、後述する潤滑油Ｏによって密封（シール）され得るように設定されている。 An intermediate portion of the rotating shaft 200 extending in the horizontal direction (front-back direction) is rotatably inserted into the first shaft hole 111b. One end (front end) side of the rotating shaft 200 is located in the first accommodating chamber 113, and the other end (rear end) side of the rotating shaft 200 is located in the second accommodating chamber 115. A minute gap (clearance) CL is formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200. The minute gap CL is set so that the rotating shaft 200 can rotate and can be sealed by the lubricating oil O described later.
　第１収容室１１３には、回転軸２００を回転させる電動機部１０が収容されている。また、第１収容室１１３は、フロントハウジング１１０ｂに形成された吸入口１１７を介して図示省略の外部冷媒回路の低圧側に連通している。吸入口１１７は、回転軸２００の軸線方向においては電動機部１０を挟んで隔壁部１１１とは反対側の位置に、高さ（上下）方向においては回転軸２００に対応する位置（すなわち、回転軸２００とほぼ同じ高さの位置）に設けられている。 The electric motor unit 10 for rotating the rotating shaft 200 is housed in the first storage chamber 113. Further, the first accommodation chamber 113 communicates with the low pressure side of an external refrigerant circuit (not shown) via a suction port 117 formed in the front housing 110b. The suction port 117 is located at a position opposite to the partition wall portion 111 across the electric motor portion 10 in the axial direction of the rotating shaft 200, and at a position corresponding to the rotating shaft 200 in the height (upper and lower) direction (that is, the rotating shaft). It is provided at a position (at almost the same height as 200).
　電動機部１０は、ステータ１１とロータ１２とを含む。 The electric motor unit 10 includes a stator 11 and a rotor 12.
　ステータ１１は、ハウジング１１０の内周面に固定されている。具体的には、ステータ１１は、センターハウジング１１０ａの隔壁部１１１よりもフロントハウジング１１０ｂ側の部位の内周面に固定されている。ステータ１１は、磁性体で円筒状に形成されたステータコア１１ａと、ステータコア１１ａ（のティース部）に例えば集中巻きで巻回されたステータコイル１１ｂと、を有している。 The stator 11 is fixed to the inner peripheral surface of the housing 110. Specifically, the stator 11 is fixed to the inner peripheral surface of a portion of the center housing 110a on the front housing 110b side of the partition wall portion 111. The stator 11 has a stator core 11a formed of a magnetic material in a cylindrical shape, and a stator coil 11b wound around the stator core 11a (the teeth portion) by, for example, concentrated winding.
　ロータ１２は、ステータ１１の径方向内側に所定の隙間を有して配置されている。ロータ１２には永久磁石が組み込まれている。ロータ１２は、円筒状に形成されており、その中空部に回転軸２００の前端側が挿通された状態で回転軸２００に固定されている。 The rotor 12 is arranged with a predetermined gap inside the stator 11 in the radial direction. A permanent magnet is incorporated in the rotor 12. The rotor 12 is formed in a cylindrical shape, and is fixed to the rotating shaft 200 with the front end side of the rotating shaft 200 inserted through the hollow portion thereof.
　電動機部１０は、フロントハウジング１１０ｂに設けられた気密端子部２０を介してステータ１１（ステータコイル１１ｂ）に電力が供給されることによってロータ１２が回転し、これにより、回転軸２００を回転させるように構成されている。 In the electric motor portion 10, the rotor 12 is rotated by supplying electric power to the stator 11 (stator coil 11b) via the airtight terminal portion 20 provided in the front housing 110b, whereby the rotating shaft 200 is rotated. It is configured in.
　第２収容室１１５には、回転軸２００を介して駆動される圧縮機構部３０が収容されている。圧縮機構部３０はロータリ圧縮機として構成されている。但し、これに限られるものではなく、圧縮機構部３０がロータリ圧縮機以外の圧縮機として構成されてもよい。第２収容室１１５は、リアハウジング１１０ｃに形成された吐出口１１９を介して前記外部冷媒回路の高圧側に連通している。吐出口１１９は、回転軸２００の軸線方向においては後述する吐出孔５３よりも隔壁部１１１側の位置に、高さ方向においては吸入口１１７と同様に回転軸２００に対応する位置に設けられている。 The second accommodating chamber 115 accommodates the compression mechanism unit 30 driven via the rotating shaft 200. The compression mechanism unit 30 is configured as a rotary compressor. However, the present invention is not limited to this, and the compression mechanism unit 30 may be configured as a compressor other than the rotary compressor. The second storage chamber 115 communicates with the high pressure side of the external refrigerant circuit via a discharge port 119 formed in the rear housing 110c. The discharge port 119 is provided at a position on the partition wall 111 side of the discharge hole 53 described later in the axial direction of the rotary shaft 200, and at a position corresponding to the rotary shaft 200 in the height direction like the suction port 117. There is.
　第２収容室１１５の底部は、潤滑油Ｏが貯留される潤滑油貯留部を構成している。換言すれば、本実施形態において、潤滑油Ｏは主に第２収容室１１５に貯留され、第１収容室１１３にはほとんど貯留されないようになっている。 The bottom of the second storage chamber 115 constitutes a lubricating oil storage portion in which the lubricating oil O is stored. In other words, in the present embodiment, the lubricating oil O is mainly stored in the second storage chamber 115, and is hardly stored in the first storage chamber 113.
　圧縮機構部３０は、ハウジング１１０の内径よりも小さい外径を有する。また、圧縮機構部３０の下部は、潤滑油Ｏに浸漬されている（すなわち、潤滑油Ｏの油面よりも下方に位置している）。 The compression mechanism portion 30 has an outer diameter smaller than the inner diameter of the housing 110. Further, the lower portion of the compression mechanism portion 30 is immersed in the lubricating oil O (that is, it is located below the oil level of the lubricating oil O).
　圧縮機構部３０は、中間仕切板４０を挟んでその両側に配置された第１圧縮機構部３０Ａ及び第２圧縮機構部３０Ｂを含む。第１圧縮機構部３０Ａは、中間仕切板４０の隔壁部１１１側（すなわち、前側）に配置されており、第２圧縮機構部３０Ｂは、中間仕切板４０の隔壁部１１１側とは反対側（すなわち、後側）に配置されている。中間仕切板４０の径方向中央部には、回転軸２００が挿通される挿通孔が形成されている。 The compression mechanism unit 30 includes a first compression mechanism unit 30A and a second compression mechanism unit 30B arranged on both sides of the intermediate partition plate 40. The first compression mechanism portion 30A is arranged on the partition wall portion 111 side (that is, the front side) of the intermediate partition plate 40, and the second compression mechanism portion 30B is on the side opposite to the partition wall portion 111 side of the intermediate partition plate 40 (that is, the front side). That is, it is arranged on the rear side). An insertion hole through which the rotating shaft 200 is inserted is formed in the radial center portion of the intermediate partition plate 40.
　図２は、図１の要部拡大図であり、主に圧縮機構部３０を示している。図３は、図１のＡ－Ａ断面図であり、主に第１圧縮機構部３０Ａの構成を示している。図４は、図１のＢ－Ｂ断面図であり、主に第２圧縮機構部３０Ｂに構成を示している。 FIG. 2 is an enlarged view of a main part of FIG. 1, and mainly shows a compression mechanism part 30. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 and mainly shows the configuration of the first compression mechanism portion 30A. FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, and the configuration is mainly shown in the second compression mechanism portion 30B.
　図２及び図３に示されるように、第１圧縮機構部３０Ａは、第１シリンダ３１Ａと、第１偏心ローラ３３Ａと、第１ベーン３５Ａと、を含む。 As shown in FIGS. 2 and 3, the first compression mechanism unit 30A includes a first cylinder 31A, a first eccentric roller 33A, and a first vane 35A.
　第１シリンダ３１Ａの一方の面（前側の面）は、隔壁部１１１の第２収容室１１５側の面に密着しており、第１シリンダ３１Ａの他方の面（後側の面）は、中間仕切板４０に密着している。第１シリンダ３１Ａは、径方向中央部に断面円形の第１シリンダ室３７Ａを有している。 One surface (front surface) of the first cylinder 31A is in close contact with the surface of the partition wall 111 on the second accommodating chamber 115 side, and the other surface (rear surface) of the first cylinder 31A is medium. It is in close contact with the partition plate 40. The first cylinder 31A has a first cylinder chamber 37A having a circular cross section at the center in the radial direction.
　第１偏心ローラ３３Ａは、第１シリンダ３１Ａの第１シリンダ室３７Ａ内に位置する回転軸２００の第１偏心部２０１に取り付けられている。第１偏心ローラ３３Ａは、回転軸２００の回転に伴って第１シリンダ３１Ａの第１シリンダ室３７Ａ内を偏心回転する。 The first eccentric roller 33A is attached to the first eccentric portion 201 of the rotating shaft 200 located in the first cylinder chamber 37A of the first cylinder 31A. The first eccentric roller 33A eccentrically rotates in the first cylinder chamber 37A of the first cylinder 31A as the rotating shaft 200 rotates.
　第１ベーン３５Ａは、第１付勢部材（コイルスプリング）３９Ａによって第１偏心ローラ３３Ａに向かって付勢されている。第１ベーン３５Ａは、第１偏心ローラ３３Ａの外周面に当接して第１シリンダ室３７Ａ内を第１吸入ポート４１Ａが位置する低圧室と第１吐出ポート４３Ａが位置する高圧室とに区画する（図３参照）。第１吸入ポート４１Ａ及び第１吐出ポート４３Ａは、回転軸２００よりも下方に設けられている。 The first vane 35A is urged toward the first eccentric roller 33A by the first urging member (coil spring) 39A. The first vane 35A abuts on the outer peripheral surface of the first eccentric roller 33A and divides the inside of the first cylinder chamber 37A into a low pressure chamber where the first suction port 41A is located and a high pressure chamber where the first discharge port 43A is located. (See FIG. 3). The first suction port 41A and the first discharge port 43A are provided below the rotating shaft 200.
　また、本実施形態において、隔壁部１１１の第１収容室１１３側の面には、ボス部１１１ａを囲繞するように第１凹部１１１ｃが形成されている。そして、この第１凹部１１１ｃの開口が隔壁部１１１の第１収容室１１３側の面に密着する第１閉塞板１２１によって閉塞され、これによって、第１収容室１１３から区画された第１吐出消音室４５Ａが形成されている。すなわち、本実施形態においては、隔壁部１１１に第１吐出消音室４５Ａが設けられている。第１吐出消音室４５Ａは、隔壁部１１１に形成された第１連通孔１１１ｄを介して、第１シリンダ３１Ａの第１シリンダ室３７Ａ内の高圧室に位置する第１吐出ポート４３Ａ（図３参照）に連通している。 Further, in the present embodiment, a first recess 111c is formed on the surface of the partition wall 111 on the side of the first storage chamber 113 so as to surround the boss portion 111a. Then, the opening of the first recess 111c is closed by the first closing plate 121 which is in close contact with the surface of the partition wall 111 on the side of the first storage chamber 113, whereby the first discharge sound deadening partitioned from the first storage chamber 113 is closed. A chamber 45A is formed. That is, in the present embodiment, the partition wall portion 111 is provided with the first discharge muffling chamber 45A. The first discharge muffling chamber 45A is a first discharge port 43A located in a high pressure chamber in the first cylinder chamber 37A of the first cylinder 31A through the first communication hole 111d formed in the partition wall portion 111 (see FIG. 3). ).
　第２圧縮機構部３０Ｂは、第１圧縮機構部３０Ａと同様の構成を有する。すなわち、第２圧縮機構部３０Ｂは、第２シリンダ３１Ｂと、第２偏心ローラ３３Ｂと、第２ベーン３５Ｂと、を含む。 The second compression mechanism unit 30B has the same configuration as the first compression mechanism unit 30A. That is, the second compression mechanism unit 30B includes a second cylinder 31B, a second eccentric roller 33B, and a second vane 35B.
　第２シリンダ３１Ｂの一方の面（前側の面）は、中間仕切板４０に密着している。第２シリンダ３１Ｂの他方の側面（後側の面）には、吐出消音室形成部材４７の一方の面が密着している。第２シリンダ３１Ｂは、径方向中央部に断面円形の第２シリンダ室３７Ｂを有している。 One surface (front surface) of the second cylinder 31B is in close contact with the intermediate partition plate 40. One surface of the discharge muffling chamber forming member 47 is in close contact with the other side surface (rear side surface) of the second cylinder 31B. The second cylinder 31B has a second cylinder chamber 37B having a circular cross section at the center in the radial direction.
　第２偏心ローラ３３Ｂは、第２シリンダ３１Ｂの第２シリンダ室３７Ｂ内に位置する回転軸２００の第２偏心部２０２に取り付けられている。第２偏心ローラ３３Ｂは、回転軸２００の回転に伴って第２シリンダ３１Ｂの第２シリンダ室３７Ｂ内を偏心回転する。なお、第２偏心部２０２は、第１偏心部２０１に対して回転軸２００に軸線まわりに約１８０°ずらして（約１８０°の位相差を有して）設けられている。 The second eccentric roller 33B is attached to the second eccentric portion 202 of the rotating shaft 200 located in the second cylinder chamber 37B of the second cylinder 31B. The second eccentric roller 33B eccentrically rotates in the second cylinder chamber 37B of the second cylinder 31B as the rotating shaft 200 rotates. The second eccentric portion 202 is provided on the rotating shaft 200 with a phase difference of about 180 ° (with a phase difference of about 180 °) with respect to the first eccentric portion 201.
　第２ベーン３５Ｂは、第２付勢部材（コイルスプリング）３９Ｂによって第２偏心ローラ３３Ｂに向かって付勢されている。第２ベーン３５Ｂは、第２偏心ローラ３３Ｂの外周面に当接して第２シリンダ室３７Ｂ内を第２吸入ポート４１Ｂが位置する低圧室と第２吐出ポート４３Ｂが位置する高圧室とに区画する（図４参照）。第２吸入ポート４１Ｂ及び第２吐出ポート４３Ｂは、第１吸入ポート４１Ａ及び第１吐出ポート４３Ａと同様、回転軸２００よりも下方に設けられている。 The second vane 35B is urged toward the second eccentric roller 33B by the second urging member (coil spring) 39B. The second vane 35B abuts on the outer peripheral surface of the second eccentric roller 33B and divides the inside of the second cylinder chamber 37B into a low pressure chamber where the second suction port 41B is located and a high pressure chamber where the second discharge port 43B is located. (See FIG. 4). The second suction port 41B and the second discharge port 43B are provided below the rotation shaft 200, like the first suction port 41A and the first discharge port 43A.
　吐出消音室形成部材４７の径方向中央部には、第２軸孔４７ａが形成されている。第２軸孔４７ａには、回転軸２００の後端部及びその近傍が回転自在に挿通されている。つまり、回転軸２００は、隔壁部１１１に形成された第１軸孔１１１ｂと吐出消音室形成部材４７に形成された第２軸孔４７ａとによって回転自在に支持されており、これら第１軸孔１１１ｂ及び第２軸孔４７ａがそれぞれ回転軸２００の軸受部を構成している。なお、第１軸孔１１１ｂの場合と同様、第２軸孔４７ａの内周面と回転軸２００の外周面との間には微小隙間が形成されている。 A second shaft hole 47a is formed in the radial center portion of the discharge muffling chamber forming member 47. The rear end portion of the rotating shaft 200 and its vicinity are rotatably inserted into the second shaft hole 47a. That is, the rotary shaft 200 is rotatably supported by the first shaft hole 111b formed in the partition wall 111 and the second shaft hole 47a formed in the discharge muffling chamber forming member 47, and these first shaft holes are rotatably supported. 111b and the second shaft hole 47a each form a bearing portion of the rotating shaft 200. As in the case of the first shaft hole 111b, a minute gap is formed between the inner peripheral surface of the second shaft hole 47a and the outer peripheral surface of the rotating shaft 200.
　また、吐出消音室形成部材４７の第２シリンダ３１Ｂ側とは反対側の面（すなわち、後側の面）には、第２軸孔４７ａを囲繞するように第２凹部４７ｂが形成されている。そして、この第２凹部４７ｂが吐出消音室形成部材４７の第２シリンダ３１Ｂとは反対側の面に密着する第２閉塞板４９によって閉塞されることによって第２吐出消音室４５Ｂが形成されている。第２吐出消音室４５Ｂは、吐出消音室形成部材４７に形成された第２連通孔４７ｃを介して、第２シリンダ３１Ｂの第２シリンダ室３７Ｂ内の高圧室に位置する第２吐出ポート４３Ｂに連通している。 Further, a second recess 47b is formed on the surface of the discharge sound deadening chamber forming member 47 opposite to the second cylinder 31B side (that is, the rear surface) so as to surround the second shaft hole 47a. .. The second discharge muffling chamber 45B is formed by closing the second recess 47b with the second closing plate 49 which is in close contact with the surface of the discharge muffling chamber forming member 47 on the side opposite to the second cylinder 31B. .. The second discharge muffling chamber 45B is connected to the second discharge port 43B located in the high pressure chamber in the second cylinder chamber 37B of the second cylinder 31B via the second communication hole 47c formed in the discharge muffling chamber forming member 47. Communicating.
　ここで、本実施形態において、第１閉塞板１２１、第１シリンダ３１Ａ、中間仕切板４０、第２シリンダ３１Ｂ、吐出消音室形成部材４７及び第２閉塞板４９は、複数の締結部材（例えば通しボルト）６０によって締結されると共に隔壁部１１１に固定されている。換言すれば、本実施形態において、圧縮機構部３０（第１圧縮機構部３０Ａ、第２圧縮機構部３０Ｂ）は、隔壁部１１１に取り付けられ且つ固定されている。 Here, in the present embodiment, the first closing plate 121, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, the discharge sound deadening chamber forming member 47, and the second closing plate 49 are a plurality of fastening members (for example, through). It is fastened by a bolt) 60 and fixed to the partition wall 111. In other words, in the present embodiment, the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) is attached to and fixed to the partition wall portion 111.
　図５は、図３のＣ－Ｃ断面図であり、図６は、図５のＤ－Ｄ断面図であり、図７は、図１のＥ－Ｅ断面図である。 FIG. 5 is a sectional view taken along the line CC of FIG. 3, FIG. 6 is a sectional view taken along the line DD of FIG. 5, and FIG. 7 is a sectional view taken along the line EE of FIG.
　本実施形態において、第１吐出消音室４５Ａと第２吐出消音室４５Ｂとは、回転軸２００よりも上方に設けられた吐出連通路５１を介して連通している。吐出連通路５１は、第１吐出消音室４５Ａを形成する第１凹部１１１ｃの底壁部、第１シリンダ３１Ａ、中間仕切板４０、第２シリンダ３１Ｂ、及び、第２吐出消音室４５Ｂを形成する第２凹部４７ｂの底壁部を水平方向に貫通して延びる通路として形成されている。また、第２吐出消音室４５Ｂは、第２閉塞板４９に形成された吐出孔５３を介して第２収容室１１５に連通している（図５、図６参照）。 In the present embodiment, the first discharge muffling chamber 45A and the second discharge muffling chamber 45B communicate with each other via a discharge communication passage 51 provided above the rotating shaft 200. The discharge communication passage 51 forms the bottom wall portion of the first recess 111c forming the first discharge muffling chamber 45A, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, and the second discharge muffling chamber 45B. It is formed as a passage extending horizontally through the bottom wall portion of the second recess 47b. Further, the second discharge muffling chamber 45B communicates with the second accommodation chamber 115 via a discharge hole 53 formed in the second closing plate 49 (see FIGS. 5 and 6).
　第１シリンダ３１Ａの第１シリンダ室３７Ａ内の低圧室に位置する第１吸入ポート４１Ａは、回転軸２００よりも下方に設けられた第１吸入通路５５を介して第１収容室１１３に連通している。本実施形態において、第１吸入通路５５は、第１吸入ポート４１Ａから第１シリンダ３１Ａ内を周方向下向きに延びた後にハウジング１１０内の底部近傍を水平方向に隔壁部１１１及び第１閉塞板１２１を貫通して第１収容室１１３に至る通路として形成されている（図２、図３、図５及び図７参照）。ここで、第１収容室１１３に開口する第１吸入通路５５の開口端部（入口側端部）５５ａは、第１軸孔１１１ｂの鉛直下方に位置している（図７参照）。 The first suction port 41A located in the low pressure chamber in the first cylinder chamber 37A of the first cylinder 31A communicates with the first storage chamber 113 via the first suction passage 55 provided below the rotating shaft 200. ing. In the present embodiment, the first suction passage 55 extends from the first suction port 41A in the first cylinder 31A downward in the circumferential direction, and then horizontally extends in the vicinity of the bottom portion in the housing 110 in the partition wall portion 111 and the first closing plate 121. Is formed as a passage leading to the first accommodation chamber 113 (see FIGS. 2, 3, 5, and 7). Here, the opening end portion (entrance side end portion) 55a of the first suction passage 55 that opens to the first accommodation chamber 113 is located vertically below the first shaft hole 111b (see FIG. 7).
　第２シリンダ３１Ｂの第２シリンダ室３７Ｂ内の低圧室に位置する第２吸入ポート４１Ｂは、第２吸入ポート４１Ｂから第２シリンダ３１Ｂ内を周方向下向きに延びた後に水平方向に中間仕切板４０を貫通して第１吸入通路５５に接続する第２吸入通路５６と、第１吸入通路５５と、を介して第１収容室１１３に連通している（図５及び図７参照）。 The second suction port 41B located in the low pressure chamber in the second cylinder chamber 37B of the second cylinder 31B extends from the second suction port 41B in the second cylinder 31B downward in the circumferential direction and then horizontally as an intermediate partition plate 40. The second suction passage 56 and the first suction passage 55, which penetrate the first suction passage 55 and connect to the first suction passage 55, communicate with the first storage chamber 113 (see FIGS. 5 and 7).
　また、電動圧縮機１００は、回転軸２００の軸受部（第１軸孔１１１ｂ、第２軸孔４７ａ）及び圧縮機構部３０（第１圧縮機構部３０Ａ、第２圧縮機構部３０Ｂ）の各摺動部に潤滑油を供給するための油供給通路７０を有している。本実施形態において、油供給通路７０は、第２閉塞板４９の内部に形成された第１油通路７１と、回転軸２００の内部を回転軸２００の軸線方向に延びる第２油通路７２と、回転軸２００の内部を径方向に延びる第１～第４油案内孔７３～７６と、を含む（図１、図２及び図６参照）。 Further, in the electric compressor 100, each slide of the bearing portion (first shaft hole 111b, second shaft hole 47a) and the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) of the rotating shaft 200 It has an oil supply passage 70 for supplying lubricating oil to the moving portion. In the present embodiment, the oil supply passage 70 includes a first oil passage 71 formed inside the second closing plate 49, and a second oil passage 72 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. Includes first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200 (see FIGS. 1, 2 and 6).
　第１油通路７１は、一端（下端）が第２閉塞板４９の底部に開口すると共に上方に延びた後に回転軸２００の後端面に向かって屈曲し、他端（上端）が第２軸孔４７ａ内に開口する通路として形成されている。具体的には、本実施形態において、第１油通路７１は、第２閉塞板４９の底部から回転軸２００に相当する位置まで垂直に延びる垂直穴と、第２閉塞板４９の吐出消音室形成部材４７側の面の第２軸孔４７ａに対応する部位から水平に延びて前記垂直穴に接続する水平穴と、で構成されている。第１油通路７１の前記一端（下端）、すなわち、前記垂直穴の開口部は、第２収容室１１５の底部近傍、より具体的には、第２収容室１１５の底部に貯留された潤滑油Ｏの液面よりも下方に位置しており、油吸込口として機能する。 One end (lower end) of the first oil passage 71 opens to the bottom of the second closing plate 49 and extends upward, and then bends toward the rear end surface of the rotating shaft 200, and the other end (upper end) is the second shaft hole. It is formed as a passage that opens in 47a. Specifically, in the present embodiment, the first oil passage 71 has a vertical hole extending vertically from the bottom of the second closing plate 49 to a position corresponding to the rotation shaft 200, and a discharge muffling chamber of the second closing plate 49. It is composed of a horizontal hole extending horizontally from a portion of the surface on the member 47 side corresponding to the second shaft hole 47a and connecting to the vertical hole. The one end (lower end) of the first oil passage 71, that is, the opening of the vertical hole is the lubricating oil stored in the vicinity of the bottom of the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115. It is located below the liquid level of O and functions as an oil suction port.
　第２油通路７２は、一端が回転軸２００の前記後端面に開口すると共に回転軸２００内を回転軸２００の軸線に沿って第１シリンダ３１Ａを超えた位置（換言すれば、第１軸孔１１１ｂ内に相当する位置）まで延びて他端が閉塞されている。第２油通路７２の前記一端は第１油通路７１の前記他端（上端）に接続しており、第１油通路７１と第２油通路７２とは一つの通路を構成している。なお、第２油通路７２が本発明の「回転軸内通路」に相当する。 One end of the second oil passage 72 opens to the rear end surface of the rotating shaft 200, and the position inside the rotating shaft 200 exceeds the first cylinder 31A along the axis of the rotating shaft 200 (in other words, the first shaft hole). It extends to a position corresponding to the inside of 111b) and the other end is closed. The one end of the second oil passage 72 is connected to the other end (upper end) of the first oil passage 71, and the first oil passage 71 and the second oil passage 72 form one passage. The second oil passage 72 corresponds to the "passage in the rotating shaft" of the present invention.
　第１油案内孔７３は、一端が第２油通路７２に開口すると共に回転軸２００内を径方向に延びて他端が第２軸孔４７ａ内に位置する回転軸２００の外周面に開口している。より具体的には、第１油案内孔７３の前記他端は、第２軸孔４７ａ内における第２シリンダ３１Ｂに隣接する部位に位置する回転軸２００の外周面に開口している。換言すれば、第１油案内孔７３は、第２油通路７２と、回転軸２００の外周面と第２軸孔４７ａの内周面との間に形成される微小隙間と、を連通している。ここで、第２軸孔４７ａ内に位置する回転軸２００の外周面のうち第１油案内孔７３の前記他端が開口する部位は、他の部位に比べて僅かに縮径されており、潤滑油溜まり部として機能する。 One end of the first oil guide hole 73 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the second shaft hole 47a. ing. More specifically, the other end of the first oil guide hole 73 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the second cylinder 31B in the second shaft hole 47a. In other words, the first oil guide hole 73 communicates with the second oil passage 72 and a minute gap formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the second shaft hole 47a. There is. Here, of the outer peripheral surface of the rotating shaft 200 located in the second shaft hole 47a, the portion where the other end of the first oil guide hole 73 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir.
　第２油案内孔７４は、一端が第２油通路７２に開口すると共に回転軸２００内を径方向に延びて他端が回転軸２００の第２偏心部２０２の外周面に開口している。ここで、第２偏心部２０２の外周面のうち第２油案内孔７４の前記他端が開口する部位は、平坦面になっており、第２偏心部２０２の外周面と第２偏心ローラ３３Ｂの内周面との間には微小隙間が形成されている。すなわち、第２油案内孔７４は、第２油通路７２と、第２偏心部２０２の外周面と第２偏心ローラ３３Ｂの内周面との間に形成される微小隙間と、を連通している。 One end of the second oil guide hole 74 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the second eccentric portion 202 of the rotating shaft 200. Here, of the outer peripheral surface of the second eccentric portion 202, the portion where the other end of the second oil guide hole 74 opens is a flat surface, and the outer peripheral surface of the second eccentric portion 202 and the second eccentric roller 33B A minute gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the second oil guide hole 74 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the second eccentric portion 202 and the inner peripheral surface of the second eccentric roller 33B. There is.
　第３油案内孔７５は、一端が第２油通路７２に開口すると共に回転軸２００内を径方向に延びて他端が回転軸２００の第１偏心部２０１の外周面に開口している。ここで、第２偏心部２０２と同様に、第１偏心部２０１の外周面のうち第３油案内孔７５の前記他端が開口する部位は、平坦面になっており、第１偏心ローラ３３Ａの内周面との間に僅かな隙間が形成されている。すなわち、第３油案内孔７５は、第２油通路７２と、第１偏心部２０１の外周面と第１偏心ローラ３３Ａの内周面との間に形成される微小隙間と、を連通している。 One end of the third oil guide hole 75 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the first eccentric portion 201 of the rotating shaft 200. Here, similarly to the second eccentric portion 202, the portion of the outer peripheral surface of the first eccentric portion 201 where the other end of the third oil guide hole 75 opens is a flat surface, and the first eccentric roller 33A A slight gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the third oil guide hole 75 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the first eccentric portion 201 and the inner peripheral surface of the first eccentric roller 33A. There is.
　第４油案内孔７６は、一端が第２油通路７２に開口すると共に回転軸２００内を径方向に延びて他端が第１軸孔１１１ｂ内に位置する回転軸２００の外周面に開口している。より具体的には、第４油案内孔７６の前記他端は、第１軸孔１１１ｂ内における第１シリンダ３１Ａに隣接する部位に位置する回転軸２００の外周面に開口している。換言すれば、第４油案内孔７６は、第２油通路７２と、回転軸２００の外周面と第１軸孔１１１ｂの内周面との間に形成される微小隙間ＣＬと、を連通している。ここで、第１軸孔１１１ｂ内に位置する回転軸２００の外周面のうち第４油案内孔７６の前記他端が開口する部位は、他の部位に比べて僅かに縮径されており、潤滑油溜まり部として機能する。なお、第４油案内孔７６が本発明の「連通孔」に相当する。 One end of the fourth oil guide hole 76 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the first shaft hole 111b. ing. More specifically, the other end of the fourth oil guide hole 76 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the first cylinder 31A in the first shaft hole 111b. In other words, the fourth oil guide hole 76 communicates the second oil passage 72 with the minute gap CL formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the first shaft hole 111b. ing. Here, of the outer peripheral surface of the rotating shaft 200 located in the first shaft hole 111b, the portion where the other end of the fourth oil guide hole 76 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir. The fourth oil guide hole 76 corresponds to the "communication hole" of the present invention.
　次に、図８及び図９を参照しつつ電動圧縮機１００の動作を説明する。図８は、電動圧縮機１００における冷媒（ガス）の流れを示し、図９は、電動圧縮機１００における潤滑油Ｏの流れを示している。 Next, the operation of the electric compressor 100 will be described with reference to FIGS. 8 and 9. FIG. 8 shows the flow of the refrigerant (gas) in the electric compressor 100, and FIG. 9 shows the flow of the lubricating oil O in the electric compressor 100.
　電動機部１０を収容する第１収容室１１３には、前記外部冷媒回路の低圧側の冷媒（低圧冷媒）がフロントハウジング１１０ｂに形成された吸入口１１７を介して流入する。つまり、第１収容室１１３は、外部から低圧冷媒が流入する「吸入室」を構成しており、第１収容室１１３の圧力は、前記外部冷媒回路の低圧側の圧力とほぼ同等である。 The low-pressure side refrigerant (low-pressure refrigerant) of the external refrigerant circuit flows into the first storage chamber 113 that houses the electric motor unit 10 through the suction port 117 formed in the front housing 110b. That is, the first storage chamber 113 constitutes a "suction chamber" in which the low-pressure refrigerant flows in from the outside, and the pressure of the first storage chamber 113 is substantially the same as the pressure on the low-pressure side of the external refrigerant circuit.
　電動機部１０に電力が供給されると回転軸２００が回転し、第１圧縮機構部３０Ａの第１シリンダ室３７Ａでは第１偏心ローラ３３Ａが偏心回転し、第２圧縮機構部３０Ｂの第２シリンダ室３７Ｂでは第２偏心ローラ３３Ｂが偏心回転する。 When power is supplied to the electric motor unit 10, the rotating shaft 200 rotates, the first eccentric roller 33A rotates eccentrically in the first cylinder chamber 37A of the first compression mechanism unit 30A, and the second cylinder of the second compression mechanism unit 30B. In the chamber 37B, the second eccentric roller 33B rotates eccentrically.
　図８において三角矢印で示されるように、吸入口１１７から第１収容室１１３に流入した低圧冷媒は、電動機部１０におけるステータ１１とロータ１２との隙間を通過し、これによって、電動機部１０が冷却される。そして、第１収容室１１３から第１吸入通路５５及び第１吸入ポート４１Ａ（図３参照）を通過した低圧冷媒が第１シリンダ室３７Ａに吸入され、第１収容室１１３から第１吸入通路５５、第２吸入通路５６及び第２吸入ポート４１Ｂを通過した低圧冷媒が第２シリンダ室３７Ｂに吸入される。このとき、第１収容室１１３の底部に貯留されている潤滑油Ｏも低圧冷媒と共に第１シリンダ室３７Ａ及び第２シリンダ室３７Ｂに吸入される（図９参照）。 As shown by the triangular arrows in FIG. 8, the low-pressure refrigerant that has flowed into the first storage chamber 113 from the suction port 117 passes through the gap between the stator 11 and the rotor 12 in the electric motor unit 10, whereby the electric motor unit 10 is moved. It is cooled. Then, the low-pressure refrigerant that has passed through the first suction passage 55 and the first suction port 41A (see FIG. 3) is sucked into the first cylinder chamber 37A from the first storage chamber 113, and the first suction passage 55 is sucked from the first storage chamber 113. , The low-pressure refrigerant that has passed through the second suction passage 56 and the second suction port 41B is sucked into the second cylinder chamber 37B. At this time, the lubricating oil O stored in the bottom of the first storage chamber 113 is also sucked into the first cylinder chamber 37A and the second cylinder chamber 37B together with the low-pressure refrigerant (see FIG. 9).
　第１シリンダ室３７Ａに吸入された低圧冷媒は、第１偏心ローラ３３Ａの偏心回転によって第１シリンダ室３７Ａ内で圧縮されて高圧冷媒となる。高圧冷媒は、図８において開いた矢印で示されるように、第１シリンダ室３７Ａから第１吐出ポート４３Ａ（図３参照）及び第１連通孔１１１ｄを介して第１吐出消音室４５Ａに吐出され、その後、吐出連通路５１を通過して第２吐出消音室４５Ｂに流入する。 The low-pressure refrigerant sucked into the first cylinder chamber 37A is compressed in the first cylinder chamber 37A by the eccentric rotation of the first eccentric roller 33A to become a high-pressure refrigerant. The high-pressure refrigerant is discharged from the first cylinder chamber 37A to the first discharge muffling chamber 45A through the first discharge port 43A (see FIG. 3) and the first communication hole 111d, as indicated by the arrows opened in FIG. After that, it passes through the discharge communication passage 51 and flows into the second discharge muffling chamber 45B.
　第２シリンダ室３７Ｂに流入した低圧冷媒は、第２偏心ローラ３３Ｂの偏心回転によって第２シリンダ室３７Ｂ内で圧縮されて高圧冷媒となり、高圧冷媒が第２シリンダ室３７Ｂから第２吐出ポート４３Ｂ（図４参照）及び第２連通孔４７ｃを介して第２吐出消音室４５Ｂに吐出される。 The low-pressure refrigerant that has flowed into the second cylinder chamber 37B is compressed in the second cylinder chamber 37B by the eccentric rotation of the second eccentric roller 33B to become a high-pressure refrigerant, and the high-pressure refrigerant is discharged from the second cylinder chamber 37B to the second discharge port 43B ( (See FIG. 4) and the second discharge muffling chamber 45B is discharged through the second communication hole 47c.
　第１シリンダ室３７Ａから吐出された高圧冷媒及び第２シリンダ室３７Ｂから吐出された高圧冷媒は第２吐出消音室４５Ｂで合流し、合流した高圧冷媒が吐出孔５３を介して第２収容室１１５に吐出される。つまり、第２収容室１１５は、圧縮機構部３０で圧縮された高圧冷媒が吐出される「吐出室」を構成しており、第２収容室１１５の圧力は、高圧冷媒の圧力（前記外部冷媒回路の高圧側の圧力）とほぼ同等である（第１収容室１１３の圧力よりも高い）。 The high-pressure refrigerant discharged from the first cylinder chamber 37A and the high-pressure refrigerant discharged from the second cylinder chamber 37B merge in the second discharge muffling chamber 45B, and the merged high-pressure refrigerant passes through the discharge hole 53 to the second accommodation chamber 115. Is discharged to. That is, the second storage chamber 115 constitutes a "discharge chamber" in which the high-pressure refrigerant compressed by the compression mechanism unit 30 is discharged, and the pressure of the second storage chamber 115 is the pressure of the high-pressure refrigerant (the external refrigerant). It is almost the same as the pressure on the high voltage side of the circuit (higher than the pressure in the first accommodation chamber 113).
　第２収容室１１５に吐出された高圧冷媒は、ハウジング１１０の内面などに接触及び／又は衝突し、これによって、高圧冷媒からそこ含まれた潤滑油Ｏが分離される。高圧冷媒から分離された潤滑油Ｏは、主に重力によって下方に移動して第２収容室１１５の底部に貯留される。一方、潤滑油Ｏが分離された後の高圧冷媒は、リアハウジング１１０ｃに形成された吐出口１１９を介して前記外部冷媒回路の高圧側に流出する。 The high-pressure refrigerant discharged into the second storage chamber 115 contacts and / or collides with the inner surface of the housing 110 or the like, whereby the lubricating oil O contained therein is separated from the high-pressure refrigerant. The lubricating oil O separated from the high-pressure refrigerant moves downward mainly by gravity and is stored in the bottom of the second storage chamber 115. On the other hand, the high-pressure refrigerant after the lubricating oil O is separated flows out to the high-pressure side of the external refrigerant circuit through the discharge port 119 formed in the rear housing 110c.
　上述のように、本実施形態において、油供給通路７０は、第２閉塞板４９の内部に形成された第１油通路７１と、回転軸２００の内部を回転軸２００の軸線方向に延びる第２油通路７２と、回転軸２００の内部を径方向に延びる第１～第４油案内孔７３～７６と、を含む。 As described above, in the present embodiment, the oil supply passage 70 has a first oil passage 71 formed inside the second closing plate 49 and a second oil passage 71 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. It includes an oil passage 72 and first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200.
　油供給通路７０の一方の端部を構成する第１油通路７１の一端（下端）は、第２収容室１１５内に、さらに言えば、第２収容室１１５の底部に貯留された潤滑油Ｏ内に位置している。また、油供給通路７０の他方の端部を構成する第４油案内孔７６は、第１軸孔１１１ｂを介して、より具体的には、回転軸２００の外周面と第１軸孔１１１ｂの内周面との間に形成される微小隙間ＣＬを介して第１収容室１１３に連通している。そして、第１収容室１１３はその圧力が低圧冷媒と同等である低圧室を構成し、第２収容室１１５はその圧力が高圧冷媒と同等の圧力である高圧室を構成している。 One end (lower end) of the first oil passage 71 constituting one end of the oil supply passage 70 is a lubricating oil O stored in the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115. Located inside. Further, the fourth oil guide hole 76 forming the other end of the oil supply passage 70 is more specifically formed on the outer peripheral surface of the rotating shaft 200 and the first shaft hole 111b via the first shaft hole 111b. It communicates with the first storage chamber 113 via a minute gap CL formed between the inner peripheral surface and the inner peripheral surface. The first storage chamber 113 constitutes a low-pressure chamber whose pressure is equivalent to that of the low-pressure refrigerant, and the second storage chamber 115 constitutes a high-pressure chamber whose pressure is equivalent to that of the high-pressure refrigerant.
　このため、図９において矢印で示されるように、第２収容室（吐出室（高圧室））１１５と第１収容室（吸入室（低圧室））１１３との圧力差によって、第２収容室１１５の底部に貯留されている潤滑油Ｏが第１油通路７１を介して吸い上げられて第２油通路７２に導かれる。第２油通路７２に導かれた潤滑油Ｏは、第４油案内孔７６を介して第１軸孔１１１ｂ（電動機部１０と圧縮機構部３０との間に位置する回転軸２００の軸受部）に供給される。第１軸孔１１１ｂに供給された潤滑油Ｏは、第１軸孔１１１ｂの内周面と回転軸２００の外周面との間に形成される微小隙間ＣＬを通過して第１収容室１１３に流出する。第１収容室１１３に流出した潤滑油Ｏは、その後に落下して第１収容室１１３の底部に貯留され、あるいは、第１収容室１１３内の低圧冷媒と共に第１圧縮機構部３０Ａの第１シリンダ室３７Ａ及び第２圧縮機構部３０Ｂの第２シリンダ室３７Ｂに吸入される。 Therefore, as shown by an arrow in FIG. 9, the pressure difference between the second accommodation chamber (discharge chamber (high pressure chamber)) 115 and the first accommodation chamber (suction chamber (low pressure chamber)) 113 causes the second accommodation chamber. The lubricating oil O stored in the bottom of the 115 is sucked up through the first oil passage 71 and guided to the second oil passage 72. The lubricating oil O guided to the second oil passage 72 passes through the fourth oil guide hole 76 to the first shaft hole 111b (bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Is supplied to. The lubricating oil O supplied to the first shaft hole 111b passes through the minute gap CL formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200 and enters the first storage chamber 113. leak. The lubricating oil O that has flowed out to the first storage chamber 113 subsequently falls and is stored in the bottom of the first storage chamber 113, or is the first of the first compression mechanism unit 30A together with the low-pressure refrigerant in the first storage chamber 113. It is sucked into the second cylinder chamber 37B of the cylinder chamber 37A and the second compression mechanism unit 30B.
　また、第２油通路７２に導かれた潤滑油Ｏは、第１油案内孔７３を介して第２軸孔４７ａ（後端側の回転軸２００の軸受部）に供給される。 Further, the lubricating oil O guided to the second oil passage 72 is supplied to the second shaft hole 47a (bearing portion of the rotating shaft 200 on the rear end side) via the first oil guide hole 73.
　さらに、第２油通路７２に導かれた潤滑油Ｏは、第２油案内孔７４を介して第２偏心ローラ３３Ｂの内側に導かれ、そこから第２圧縮機構部３０Ｂの各摺動部に供給される。同様に、第２油通路７２に導かれた潤滑油Ｏは、第３油案内孔７５を介して第１偏心ローラ３３Ａの内側に導かれ、そこから第１圧縮機構部３０Ａの各摺動部に供給される。 Further, the lubricating oil O guided to the second oil passage 72 is guided to the inside of the second eccentric roller 33B through the second oil guide hole 74, and from there to each sliding portion of the second compression mechanism portion 30B. Supplied. Similarly, the lubricating oil O guided to the second oil passage 72 is guided to the inside of the first eccentric roller 33A through the third oil guide hole 75, and from there, each sliding portion of the first compression mechanism portion 30A. Is supplied to.
　本実施形態に係る電動圧縮機１００によれば次のような効果が得られる。 According to the electric compressor 100 according to the present embodiment, the following effects can be obtained.
　本実施形態に係る電動圧縮機１００において、ハウジング１１０内は、隔壁部１１１によって、電動機部１０を収容する第１収容室１１３と圧縮機構部３０を収容する第２収容室１１５とに区画されている。また、第２収容室１１５の底部が潤滑油Ｏを貯留する潤滑油貯留部を構成しており、隔壁部１１１には、潤滑油Ｏを第１収容室１１３と第２収容室１１５との間で流通させる油流通口等が設けられていない。このため、電動圧縮機１００が傾斜等した場合でも潤滑油Ｏが第２収容室１１５から第１収容室１１３に流入することがほとんどなく、圧縮機構部３０側に十分な量の潤滑油Ｏが確保され得る。また、電動機部１０の回転によって攪拌される潤滑油Ｏもほとんどないため、電動圧縮機１００から高圧冷媒と共に前記外部冷媒回路に流出する潤滑油の量も大幅に低減される。したがって、従来に比べて少ない量の潤滑油によって圧縮機構部３０の潤滑性とシール性とが確保され得る。 In the electric compressor 100 according to the present embodiment, the inside of the housing 110 is divided into a first storage chamber 113 for accommodating the electric motor unit 10 and a second storage chamber 115 for accommodating the compression mechanism unit 30 by the partition wall portion 111. There is. Further, the bottom of the second accommodating chamber 115 constitutes a lubricating oil storage portion for accommodating the lubricating oil O, and the lubricating oil O is placed between the first accommodating chamber 113 and the second accommodating chamber 115 in the partition wall portion 111. There is no oil distribution port or the like for distribution in. Therefore, even when the electric compressor 100 is tilted or the like, the lubricating oil O hardly flows from the second storage chamber 115 into the first storage chamber 113, and a sufficient amount of the lubricating oil O is provided on the compression mechanism portion 30 side. Can be secured. Further, since there is almost no lubricating oil O that is agitated by the rotation of the electric motor unit 10, the amount of lubricating oil that flows out from the electric compressor 100 to the external refrigerant circuit together with the high-pressure refrigerant is also significantly reduced. Therefore, the lubricity and sealing property of the compression mechanism portion 30 can be ensured with a smaller amount of lubricating oil than in the past.
　また、隔壁部１１１は、例えば、鋳造や溶接によりハウジング１１０（センターハウジング１１０ａ）に一体に形成されて（設けられて）いる。このため、電動圧縮機１００の製造時等に隔壁部１１１をハウジング１１０内に取り付ける必要がないことに加えて、隔壁部１１１を利用して圧縮機構部３０を安定且つ精度よくハウジング１１０内に取り付けることも可能である。したがって、電動圧縮機１００の良好な組立作業性が得られる。 Further, the partition wall portion 111 is integrally formed (provided) with the housing 110 (center housing 110a) by, for example, casting or welding. Therefore, it is not necessary to mount the partition wall 111 in the housing 110 when manufacturing the electric compressor 100, and the compression mechanism section 30 is stably and accurately mounted in the housing 110 by using the partition wall 111. It is also possible. Therefore, good assembly workability of the electric compressor 100 can be obtained.
　さらに、第２収容室１１５の圧力は、第１収容室１１３の圧力よりも高く、油供給通路７０は、第２収容室１１５と第１収容室１１３との圧力差を利用して第２収容室１１５に貯留されている潤滑油Ｏを吸い上げて第１軸孔１１１ｂ（電動機部１０と圧縮機構部３０との間に位置する回転軸２００の軸受部）に供給するように構成されている。このため、電動圧縮機１００の動作中、第１軸孔１１１ｂへの給油が安定且つ確実に行われ得る。 Further, the pressure of the second accommodation chamber 115 is higher than the pressure of the first accommodation chamber 113, and the oil supply passage 70 uses the pressure difference between the second accommodation chamber 115 and the first accommodation chamber 113 to perform the second accommodation. It is configured to suck up the lubricating oil O stored in the chamber 115 and supply it to the first shaft hole 111b (the bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Therefore, during the operation of the electric compressor 100, lubrication to the first shaft hole 111b can be performed stably and reliably.
　特に、本実施形態において、第１収容室１１３は吸入口１１７を介して外部からの低圧冷媒が流入する吸入室（低圧室）として構成され、及び、第２収容室１１５は圧縮機構部３０で圧縮された高圧冷媒が吐出される吐出室（高圧室）として構成されている。このため、前記圧力差がより大きくなり、第１軸孔１１１ｂへの給油が十分に行われ得る。 In particular, in the present embodiment, the first accommodation chamber 113 is configured as a suction chamber (low pressure chamber) in which a low-pressure refrigerant from the outside flows in through the suction port 117, and the second accommodation chamber 115 is a compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) in which the compressed high-pressure refrigerant is discharged. Therefore, the pressure difference becomes larger, and the first shaft hole 111b can be sufficiently refueled.
　また、本実施形態に係る電動圧縮機１００において、第１収容室１１３内の低圧冷媒を圧縮機構部３０（第１圧縮機構部３０Ａ、第２圧縮機構部３０Ｂ）に導く吸入通路（第１吸入通路５５、第２吸入通路５６）は、回転軸２００よりも下方に配置されている。このため、第１収容室１１３の底部に貯留した潤滑油Ｏが低圧冷媒と共に圧縮機構部３０に吸入され得る。したがって、第１収容室１１３（の底部）に潤滑油Ｏが滞留することが抑制され、圧縮機構部３０側に十分な量の潤滑油Ｏが確保され得る。特に、本実施形態においては、第１収容室１１３に開口する前記吸入通路の開口端部（第１吸入通路５５の開口端部５５ａ）が第１軸孔１１１ｂの鉛直下方に位置している。このため、第１軸孔１１１ｂを通過して第１収容室１１３に流入した後に落下した潤滑油Ｏが速やかに圧縮機構部３０に吸入され得る。 Further, in the electric compressor 100 according to the present embodiment, the suction passage (first suction) that guides the low-pressure refrigerant in the first storage chamber 113 to the compression mechanism section 30 (first compression mechanism section 30A, second compression mechanism section 30B). The passage 55 and the second suction passage 56) are arranged below the rotation shaft 200. Therefore, the lubricating oil O stored in the bottom of the first storage chamber 113 can be sucked into the compression mechanism unit 30 together with the low-pressure refrigerant. Therefore, it is possible to prevent the lubricating oil O from staying in (the bottom portion of) the first storage chamber 113, and to secure a sufficient amount of the lubricating oil O on the compression mechanism portion 30 side. In particular, in the present embodiment, the open end portion of the suction passage (open end portion 55a of the first suction passage 55) that opens into the first storage chamber 113 is located vertically below the first shaft hole 111b. Therefore, the lubricating oil O that has fallen after passing through the first shaft hole 111b and flowing into the first storage chamber 113 can be quickly sucked into the compression mechanism unit 30.
　さらに、吸入口１１７は、電動機部１０を挟んで隔壁部１１１とは反対側であって且つ回転軸２００に対応する高さ位置に設けられている。このため、吸入口１１７から第１収容室１１３に流入する低圧冷媒が、電動機部１０の冷却と潤滑油Ｏの第１収容室１１３での滞留抑制とにバランスよく利用され得る。 Further, the suction port 117 is provided on the opposite side of the partition wall portion 111 with the electric motor portion 10 interposed therebetween and at a height position corresponding to the rotation shaft 200. Therefore, the low-pressure refrigerant flowing from the suction port 117 into the first storage chamber 113 can be used in a well-balanced manner for cooling the electric motor unit 10 and suppressing the retention of the lubricating oil O in the first storage chamber 113.
　なお、図示は省略するが、第１軸孔１１１ｂ内の内周面に又は第１軸孔１１１ｂ内に位置する回転軸２００の外周面に、回転軸２００の外周面と第１軸孔１１１ｂの内周面との間に位置する潤滑油Ｏを第１収容室１１３側から第２収容室１１５側へと移動させるスパイラル溝が形成されていてもよい。このようにすれば、潤滑油Ｏが回転軸２００の外周面と第１軸孔１１１ｂの内周面との間に滞留する時間が長くなり、第１軸孔１１１ｂにおける潤滑油不足が効果的に防止され得る。 Although not shown, the outer peripheral surface of the rotating shaft 200 and the outer peripheral surface of the rotating shaft 200 are located on the inner peripheral surface of the first shaft hole 111b or on the outer peripheral surface of the rotating shaft 200 located in the first shaft hole 111b. A spiral groove may be formed to move the lubricating oil O located between the inner peripheral surface and the lubricating oil O from the first storage chamber 113 side to the second storage chamber 115 side. By doing so, the time for the lubricating oil O to stay between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the first shaft hole 111b becomes longer, and the lack of lubricating oil in the first shaft hole 111b is effective. Can be prevented.
　また、上述の実施形態において、第１収容室１１３は外部から低圧冷媒が流入する吸入室（低圧室）として構成され、及び、第２収容室１１５は圧縮機構部３０で圧縮された高圧冷媒が吐出される吐出室（高圧室）として構成されている。しかし、これに限られるものではなく、第２収容室１１５の圧力が第１収容室１１３の圧力よりも高ければよい。 Further, in the above-described embodiment, the first storage chamber 113 is configured as a suction chamber (low pressure chamber) into which the low pressure refrigerant flows from the outside, and the second storage chamber 115 contains the high pressure refrigerant compressed by the compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) for discharge. However, the pressure is not limited to this, and the pressure in the second storage chamber 115 may be higher than the pressure in the first storage chamber 113.
　以上、本発明の実施形態及びその変形例について説明したが、本発明は、上述の各実施形態やその変形例に制限されるものではなく、本発明の技術的思想に基づいてさらなる変形及び変更が可能であることはもちろんである。 Although the embodiments of the present invention and modified examples thereof have been described above, the present invention is not limited to the above-described embodiments and modified examples thereof, and further modifications and modifications are made based on the technical idea of the present invention. Of course it is possible.
　１０…電動機部、１１…ステータ、１２…ロータ、３０…圧縮機構部、３０Ａ…第１圧縮機構部、３０Ｂ…第２圧縮機構部、５５…第１吸入通路、５５ａ…開口端部（入口側端部）、５６…第２吸入通路、５１…吐出連通路、５３…吐出孔、７０…油供給通路、７１…第１油通路、７２…第２油通路（回転軸内通路）、７３…第１油案内孔、７４…第２油案内孔、７５…第３油案内孔、７６…第４油案内孔（連通孔）、１００…横置型電動圧縮機、１１０…ハウジング、１１０ａ…センターハウジング、１１０ｂ…フロントハウジング、１１０ｃ…リアハウジング、１１１…隔壁部、１１１ａ…ボス部、１１１ｂ…第１軸孔（軸受部）、１１３…第１収容室、１１５…第２収容室、１１７…吸入口、１１９…吐出口、２００…回転軸、ＣＬ…微小隙間、Ｏ…潤滑油 10 ... Electric unit, 11 ... Stator, 12 ... Rotor, 30 ... Compression mechanism, 30A ... First compression mechanism, 30B ... Second compression mechanism, 55 ... First suction passage, 55a ... Open end (entrance side) (End), 56 ... 2nd suction passage, 51 ... Discharge communication passage, 53 ... Discharge hole, 70 ... Oil supply passage, 71 ... 1st oil passage, 72 ... Second oil passage (passage in rotating shaft), 73 ... 1st oil guide hole, 74 ... 2nd oil guide hole, 75 ... 3rd oil guide hole, 76 ... 4th oil guide hole (communication hole), 100 ... horizontal electric compressor, 110 ... housing, 110a ... center housing , 110b ... front housing, 110c ... rear housing, 111 ... partition wall portion, 111a ... boss portion, 111b ... first shaft hole (bearing portion), 113 ... first accommodation chamber, 115 ... second accommodation chamber 117 ... suction port , 119 ... Discharge port, 200 ... Rotating shaft, CL ... Micro gap, O ... Lubricating oil

Claims (10)

  1. 　ハウジング内に回転軸を回転させる電動機部と前記回転軸を介して駆動される圧縮機構部とを有し、前記回転軸を回転自在に支持する前記回転軸の軸受部が前記電動機部と前記圧縮機構部との間に設けられている横置型電動圧縮機であって、
    　前記ハウジングに一体に設けられ、前記電動機部を収容する第１収容室と前記圧縮機構部を収容すると共に前記第１収容室の圧力よりも高い圧力を有する第２収容室とに前記ハウジング内を区画する隔壁部と、
    　前記軸受部に潤滑油を供給する油供給通路であって、一方の端部が前記第２収容室内に位置すると共に他方の端部側が前記軸受部を介して前記第１収容室に連通し、前記第２収容室と前記第１収容室との圧力差を利用して前記潤滑油を前記軸受部に供給するように構成された前記油供給通路と、
    　を有する、横置型電動圧縮機。     The motor portion that rotates the rotating shaft and the compression mechanism portion that is driven via the rotating shaft are provided in the housing, and the bearing portion of the rotating shaft that rotatably supports the rotating shaft is the electric motor portion and the compression. It is a horizontal electric compressor installed between the mechanism and the mechanism.
    The inside of the housing is provided integrally with the housing, and the inside of the housing is provided in a first storage chamber for accommodating the electric motor portion and a second storage chamber for accommodating the compression mechanism portion and having a pressure higher than the pressure of the first accommodation chamber. The partition wall and the partition
    An oil supply passage for supplying lubricating oil to the bearing portion, one end of which is located in the second accommodating chamber and the other end side communicating with the first accommodating chamber via the bearing portion. The oil supply passage configured to supply the lubricating oil to the bearing portion by utilizing the pressure difference between the second accommodating chamber and the first accommodating chamber.
    Horizontal electric compressor.
  2. 　前記軸受部は、前記隔壁部に設けられて前記回転軸が挿通される軸孔であり、
    　前記油供給通路の前記他方の端部側は、前記回転軸の外周面と前記軸孔の内周面との間に形成される微小隙間を介して前記第１収容室に連通し、
    　前記油供給通路は、前記潤滑油を前記微小隙間に供給するように構成されている、
    　請求項１に記載の横置型電動圧縮機。     The bearing portion is a shaft hole provided in the partition wall portion through which the rotating shaft is inserted.
    The other end side of the oil supply passage communicates with the first storage chamber through a minute gap formed between the outer peripheral surface of the rotating shaft and the inner peripheral surface of the shaft hole.
    The oil supply passage is configured to supply the lubricating oil to the minute gaps.
    The horizontal electric compressor according to claim 1.
  3. 　前記油供給通路は、前記回転軸の内部を前記回転軸の軸線に沿って延びる回転軸内通路と、前記回転軸内通路と前記微小隙間とを連通する連通孔と、を含む、請求項２に記載の横置型電動圧縮機。 2. The oil supply passage includes a passage in a rotation shaft extending inside the rotation shaft along the axis of the rotation shaft, and a communication hole for communicating the passage in the rotation shaft and the minute gap. Horizontal electric compressor described in.
  4. 　前記油供給通路は、前記回転軸内通路内の潤滑油を前記圧縮機構部の摺動部へと導くための案内孔をさらに含む、請求項３に記載の横置型電動圧縮機。 The horizontal electric compressor according to claim 3, wherein the oil supply passage further includes a guide hole for guiding the lubricating oil in the passage in the rotating shaft to the sliding portion of the compression mechanism portion.
  5. 　前記軸孔の内周面又は前記軸孔内に位置する前記回転軸の外周面には、前記回転軸の回転によって前記微小隙間に位置する潤滑油を前記第１収容室側から前記第２収容室側に向けて移動させるスパイラル溝が形成されている、請求項２～４のいずれか一つに記載の横置型電動圧縮機。 Lubricating oil located in the minute gap is stored in the inner peripheral surface of the shaft hole or the outer peripheral surface of the rotating shaft located in the shaft hole from the first storage chamber side to the second storage chamber side due to the rotation of the rotating shaft. The horizontal electric compressor according to any one of claims 2 to 4, wherein a spiral groove for moving toward the room side is formed.
  6. 　前記第１収容室は外部から吸入口を介して低圧冷媒が流入する吸入室として構成され、前記第２収容室は前記圧縮機構部で圧縮された高圧冷媒が吐出される吐出室として構成されている、請求項１～５のいずれか一つに記載の横置型電動圧縮機。 The first storage chamber is configured as a suction chamber in which a low-pressure refrigerant flows in from the outside through a suction port, and the second storage chamber is configured as a discharge chamber in which the high-pressure refrigerant compressed by the compression mechanism unit is discharged. The horizontal electric compressor according to any one of claims 1 to 5.
  7. 　前記圧縮機構部は、吸入通路を介して前記第１収容室内の低圧冷媒を吸入し、圧縮して前記第２収容室内に吐出するように構成され、
    　前記吸入通路は、前記回転軸よりも下方に配置されている、
    　請求項６に記載の横置型電動圧縮機。     The compression mechanism unit is configured to suck the low-pressure refrigerant in the first storage chamber through the suction passage, compress it, and discharge it into the second storage chamber.
    The suction passage is arranged below the axis of rotation.
    The horizontal electric compressor according to claim 6.
  8. 　前記第１収容室に開口する前記吸入通路の入口側端部は、前記軸受部の鉛直下方に位置している、請求項７に記載の横置型電動圧縮機。 The horizontal electric compressor according to claim 7, wherein the inlet-side end of the suction passage that opens into the first storage chamber is located vertically below the bearing.
  9. 　前記吸入口は、前記電動機部を挟んで前記隔壁部とは反対側であって且つ前記回転軸に対応する高さ位置に設けられている、請求項６又は７に記載の横置型電動圧縮機。 The horizontal electric compressor according to claim 6 or 7, wherein the suction port is provided on the side opposite to the partition wall portion across the electric motor portion and at a height position corresponding to the rotation shaft. ..
  10. 　前記軸受部は、前記隔壁部に一体に形成され、
    　前記圧縮機構部は、前記隔壁部に固定されている、
    　請求項１～９のいずれか一つに記載の横置型電動圧縮機。     The bearing portion is integrally formed with the partition wall portion.
    The compression mechanism portion is fixed to the partition wall portion.
    The horizontal electric compressor according to any one of claims 1 to 9.
PCT/JP2020/031582 2019-09-09 2020-08-21 Horizontal electric compressor WO2021049273A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110332114A (en) * 2019-06-10 2019-10-15 珠海格力节能环保制冷技术研究中心有限公司 A kind of compressor pump structure, assembly method and rotor compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833042B1 (en) * 1967-03-23 1973-10-11
JPH036092U (en) * 1989-06-06 1991-01-22
JP2006177214A (en) * 2004-12-21 2006-07-06 Mitsubishi Heavy Ind Ltd Electric compressor
JP2018127980A (en) * 2017-02-09 2018-08-16 株式会社豊田自動織機 Motor compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833042B1 (en) * 1967-03-23 1973-10-11
JPH036092U (en) * 1989-06-06 1991-01-22
JP2006177214A (en) * 2004-12-21 2006-07-06 Mitsubishi Heavy Ind Ltd Electric compressor
JP2018127980A (en) * 2017-02-09 2018-08-16 株式会社豊田自動織機 Motor compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110332114A (en) * 2019-06-10 2019-10-15 珠海格力节能环保制冷技术研究中心有限公司 A kind of compressor pump structure, assembly method and rotor compressor

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