US20100183465A1 - Scroll Compressor - Google Patents
Scroll Compressor Download PDFInfo
- Publication number
- US20100183465A1 US20100183465A1 US12/663,682 US66368208A US2010183465A1 US 20100183465 A1 US20100183465 A1 US 20100183465A1 US 66368208 A US66368208 A US 66368208A US 2010183465 A1 US2010183465 A1 US 2010183465A1
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- United States
- Prior art keywords
- scroll
- support surface
- movable scroll
- movable
- thrust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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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
- F04C29/0021—Systems for the equilibration of forces acting on the pump
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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
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
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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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
Definitions
- the present invention relates to a scroll compressor in which a fixed scroll and a movable scroll are combined together to carry out compression.
- Scroll compressors are used in automobile air-conditioning systems, home air-conditioners, refrigerators, etc. Many of these scroll compressors use a compression unit in which a vortical wrap of a fixed scroll and that of a movable scroll are engaged with each other.
- the orbiting movement of the movable scroll gradually reduces the capacity of a crescent-shaped compression chamber that is formed between the vortical wrap of the fixed scroll and that of the movable scroll.
- This action of the compression chamber is used to compress a to-be-compressed fluid such as a refrigerant.
- the movable scroll is applied with load in an axial direction, namely in a thrust direction, as a reaction force of the compression.
- the load acts to separate the movable scroll away from the fixed scroll.
- the scroll compressor is provided with a movable-scroll receiving support surface in the back face of an end wall supporting the wrap of the movable scroll, and also provided with a thrust receiving structure for receiving a thrust load in the movable-scroll receiving support surface.
- the thrust receiving structure is required to be designed in consideration of downsizing of the compressor.
- a thrust receiving structure with a plurality of thrust plates made up of small disc-like parts in the movable-scroll receiving support surface to be arranged in a circumferential direction of the movable scroll by using an embedding construction.
- Recessed areas are formed in a flat section of the movable-scroll receiving support surface, which faces the end wall of the movable scroll, along the circumferential direction of the movable scroll.
- the thrust plates are interfitted in their respective recessed areas so that the upper faces of the thrust plates slightly project from the openings of the recessed areas.
- the thrust plates supported with the bottom faces of the recessed areas each have a structure for receiving the end wall of the movable scroll.
- this structure uses a plurality of disc-like thin parts, it has the advantage that the thrust receiving structure itself is compact.
- the movable scroll orbits around the axis of the fixed scroll while keeping a parallel attitude.
- the recessed areas are formed in the respective sections of the movable-scroll receiving support surface by machining.
- the machining is prone to generate variation in a depth direction.
- the thrust plates are the parts arranged along the circumferential direction of the movable scroll and supporting the movable scroll from the back face of the movable scroll.
- the depth-directional variation in the recessed areas emerges as an inclination of the movable scroll. This means that the movable scroll is engaged with the fixed scroll in an inclined position due to the thrust plates.
- This inclination of the movable scroll affects a compression stroke that is carried out between the fixed and movable scrolls and is liable to cause a deterioration in compression performance.
- the scroll compressor according to the invention has a compression unit including a movable scroll made up by forming a vortical wrap in an end wall and a similar fixed scroll, and being capable of carrying out compression along with an orbiting movement of the movable scroll with the wraps of the scrolls engaged with each other; a movable-scroll receiving support surface formed on a back-face side of the end wall of the movable scroll and including a flat face opposite to the back face of the end wall; and a plurality of thrust plates that are scattered in the support surface along a circumferential direction of the movable scroll, slidably supports the back face of the end wall of the movable scroll, and receives a thrust load from the movable scroll.
- the thrust plates are fixed onto the flat face of the support surface so as to be supported with the flat face by using the flat face as reference.
- the invention has a structure in which the thrust plates are supported with the flat face of the scroll-receiving support surface that can be maintained with high accuracy, the movable scroll can be supported with the thrust plates from the back face without being unnecessarily inclined.
- each of the thrust plates has a projection protruding toward the support surface, and the support surface has a hole that opens toward the corresponding thrust plate.
- Each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
- the thrust plates are firmly fixed onto the flat face of a scroll-receiving support surface without inclining the thrust plates with a simple structure.
- the support surface has a projection protruding toward the corresponding thrust plate, and each of the thrust plates has a hole that opens toward the support surface.
- Each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
- the thrust plates are firmly fixed onto the flat face of the scroll-receiving support surface without inclining the thrust plates with a simple structure.
- FIG. 1 is a normal sectional view of a scroll compressor according to a first embodiment of the invention
- FIG. 2 is a sectional view taken along line II-II of FIG. 1 ;
- FIG. 3 is a sectional view taken along line III-III of FIG. 2 ;
- FIG. 4 is an exploded perspective view showing a fixing structure of a thrust plate
- FIG. 5 is a sectional view showing a substantial part of a second embodiment of the invention.
- FIG. 6 is an exploded perspective view showing a fixing structure of a thrust plate according to the second embodiment.
- FIGS. 1 to 4 The invention will be described with reference to a first embodiment shown in FIGS. 1 to 4 .
- FIG. 1 is a normal sectional view of a scroll compressor, or for example, an electric scroll compressor for vehicle air-conditioning.
- FIG. 2 is a sectional side view taken along line II-II of FIG. 1 .
- FIG. 3 is a partially sectional view taken along line of FIG. 2 .
- FIG. 4 shows a fixing structure of a thrust plate.
- reference mark 1 represents a housing of the scroll compressor.
- the housing 1 is constructed by serially connecting a compression-unit casing 1 a having a shape of a cylinder with a bottom to a similar electric-unit casing 1 b with a cylindrical middle casing 1 c disposed therebetween.
- a compression unit 5 is installed in the compression-unit casing 1 a .
- the compression unit 5 has a structure in which a fixed scroll 3 disposed on the bottom side of the casing 1 a is engaged with a movable scroll 4 disposed on the opening side.
- the fixed scroll 3 and the movable scroll 4 each have a structure in which a vortical wrap 8 is disposed, for example, in a circular end wall 7 .
- a cylindrical boss 11 In the center of the back face of the end wall 7 of the movable scroll 4 , there is a cylindrical boss 11 in which an eccentric bush 10 is rotatably fitted.
- a wrap 8 of the fixed scroll 3 and a wrap 8 of the movable scroll 4 are engaged with each other.
- a crescent-shaped compression chamber 12 having capacity varied along with an orbiting movement of the movable scroll 4 is formed between the wraps 8 .
- the middle casing 1 c there is formed a cylindrical protruding portion that protrudes close to the end wall 7 of the movable scroll 4 .
- the protruding portion serves as a movable-scroll receiving support surface 13 (hereinafter, referred to as a support surface 13 ) that receives the movable scroll 4 .
- the support surface 13 has a tip end face that is formed of a ring-like flat face 13 a parallel with the end walls 7 of the fixed and movable scrolls 3 and 4 . Needless to say, the flat face 13 a is situated closely opposite to a back face 7 a of the end wall 7 .
- An electric unit 17 formed by interlocking a rotor 15 and a stator 16 together is installed in the electric-unit casing 1 b to be located on the opening side.
- On the bottom side there is disposed an inverter unit 18 for controlling the electric unit.
- the rotor 15 has a shaft 15 a including both ends rotatably supported with bearings 19 and 20 that are set in the electric-unit casing 1 b and the middle casing 1 c .
- an eccentric pin 21 is set in an eccentric position of a shaft end of a shaft 10 a supported with the middle casing 1 c.
- the eccentric pin 21 is inserted in an eccentric aperture located in an eccentric position of the eccentric bush 10 of the movable scroll 4 .
- the movable scroll 4 orbits around an axis of the fixed scroll 3 to vary the capacity of the crescent-shaped compression chamber 12 , to thereby compress a to-be-compressed fluid such as refrigerant.
- the movable scroll 4 does not rotate on its axis and is capable of making an orbiting movement only, by using four pin-type rotation-suppressing devices 22 situated between the end wall 7 of the movable scroll and the support surface 13 as illustrated in FIGS. 1 and 2 .
- a plurality of thrust plates 25 are scattered along a circumferential direction of the movable scroll 4 between the back face 7 a of the end wall 7 of the movable scroll 4 and the ring-like flat face 13 a.
- Each of the thrust plates 25 is made up of a thin circular member (having, for example, a diameter of about 10 mm and a thickness of about 2 mm).
- the fixing of the thrust plate 25 uses a structure that supports the entire thrust plate 25 by using the flat face 13 a of the support surface 13 as reference plane, in which accuracy can be easily obtained.
- a projection such as a short-columnar projection 28 is formed in either a lower face 25 a (one side face opposite to the flat face 13 a ) of the thrust plate 25 or the flat face 13 a (face opposite to the lower face 25 a ) of the support surface 13 as shown in FIGS. 3 and 4 .
- a hole such as a hole in which the entire protruding projection 28 is fitted, or more specifically, an interfitting hole 29 .
- the short-columnar projection 28 is integrally formed in the center (substantially center) of the lower face 25 a of the thrust plate 25 .
- a cylindrical interfitting hole 29 with a bottom is formed in each point on the flat face 13 a, which coincides with the corresponding projection 28 .
- the interfitting hole 29 has an internal diameter size corresponding to an external diameter of the projection 28 and a depth that is longer than a projection length of the projection 28 .
- Letter H in FIG. 3 indicates the depth of the interfitting hole 29 .
- the projection 28 is slidably (rotatably) interfitted in the interfitting hole 29 .
- the entire projection 28 protruding from the lower face 25 a is received in the interfitting hole 29 .
- the thrust plate 25 is thus positioned at a predetermined point, and the lower face 25 a of the thrust plate 25 abuts against the flat face 13 a.
- the thrust plate 25 is thus disposed (placed) to be superimposed upon the flat face 13 a.
- the entire thrust plate 25 is supported with the flat face 13 a of the support surface 13 from the lower side, and is positioned at a predetermined position.
- the thrust plate 25 is fitted onto the flat face 13 a by using the flat face 13 a as reference.
- the thrust plate 25 supported with the flat face 13 a supports the end wall 7 of the movable scroll 4 from the back-face side, and receives a thrust load applied to the movable scroll 4 .
- the rotor 15 rotates when the electric unit 17 is excited.
- the rotation is transmitted from the shaft 15 a through the eccentric pin 21 to the movable scroll 4 .
- the movable scroll 4 then orbits around the axis of the fixed scroll 3 , and compresses the to-be-compressed fluid such as refrigerant by varying the capacity of the compression chamber 12 located between the wraps 8 .
- the thrust load applied to the movable scroll 4 is received by the plurality of thrust plates 25 supporting the end wall 7 .
- the thrust plate 25 is superimposed upon the flat face 13 a.
- the thrust plate 25 is positioned by using the flat face 13 a as reference.
- the thrust plate 25 is not affected by the variation. This means that the thrust plate 25 is not inclined. This is because the flat face 13 a upon which the thrust plate 25 is superimposed is a section in which high accuracy is easily obtained.
- the movable scroll 4 is properly supported from the thrust plates 25 located in any points by using the flat face 13 a as reference.
- the movable scroll 4 is therefore not inclined in relation to the fixed scroll 3 , and always retains a predetermined attitude, or a proper fixed attitude suitable for compression. Consequently, the movable scroll 4 can satisfactorily carry out a desired compression performance in cooperation with the fixed scroll 3 .
- the fixing of the thrust plates 25 is carried out without difficulty since the interfitting structure in which the projection 28 and the interfitting hole 29 are fitted together is employed.
- FIGS. 5 and 6 show a second embodiment of the invention.
- a pin member 35 is formed as a projection in the flat face 13 a of the support surface 13 .
- a through-hole 36 piercing in thickness direction as a hole, whereby the thrust plate 25 is superimposed upon the flat face 13 a.
- the pin member 35 projects towards the lower face of the thrust plate 25 .
- the through-hole 36 has an internal diameter size corresponding to an external diameter of the pin member 35 .
- the pin member 35 is slidably (rotatably) interfitted in the through-hole 36 , and the entire pin member 36 protruding from the flat face 13 aa is received in the through-hole 36 .
- the thrust plate 25 is positioned at a predetermined point as in the first embodiment, and the entire thrust plate 25 is supported from the lower side by using the flat face 13 a of the support surface 13 as reference similarly to the first embodiment.
- the invention is not limited to the first and second embodiments, and may be modified in various ways without deviating from the gist of the invention.
- the embodiments have a structure in which the projection and the through-hole are formed in the lower face of the thrust plate, and the hole and the pin member in the flat face.
- the invention may have a structure in which the thrust plate is positioned by using the flat face of another support surface as reference.
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- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention provides a scroll compressor in which a movable scroll is supported from a back face with a plurality of thrust plates without being inclined.
The scroll compressor of the invention has a compression unit including a movable scroll made up by forming a vortical wrap in an end wall and a similar fixed scroll, and being capable of carrying out compression along with an orbiting movement of the movable scroll with the wraps of the scrolls engaged with each other; a movable-scroll receiving support surface formed on a back-face side of the end wall of the movable scroll and including a flat face opposite to the back face of the end wall; and a plurality of thrust plates that are scattered in the support surface along a circumferential direction of the movable scroll, slidably supports the back face of the end wall of the movable scroll, and receives a thrust load from the movable scroll. The thrust plates are fixed onto the flat face of the support surface so as to be supported with the flat face by using the flat face as reference.
Description
- The present invention relates to a scroll compressor in which a fixed scroll and a movable scroll are combined together to carry out compression.
- Scroll compressors are used in automobile air-conditioning systems, home air-conditioners, refrigerators, etc. Many of these scroll compressors use a compression unit in which a vortical wrap of a fixed scroll and that of a movable scroll are engaged with each other.
- In the compression unit, the orbiting movement of the movable scroll gradually reduces the capacity of a crescent-shaped compression chamber that is formed between the vortical wrap of the fixed scroll and that of the movable scroll. This action of the compression chamber is used to compress a to-be-compressed fluid such as a refrigerant.
- During compression, the movable scroll is applied with load in an axial direction, namely in a thrust direction, as a reaction force of the compression. In other words, the load acts to separate the movable scroll away from the fixed scroll. In order to suppress this action that deteriorates the compression performance, the scroll compressor is provided with a movable-scroll receiving support surface in the back face of an end wall supporting the wrap of the movable scroll, and also provided with a thrust receiving structure for receiving a thrust load in the movable-scroll receiving support surface.
- The thrust receiving structure is required to be designed in consideration of downsizing of the compressor.
- In late years, as shown in Unexamined Patent Publication No. 2005-291151, it has been suggested to provide a thrust receiving structure with a plurality of thrust plates made up of small disc-like parts in the movable-scroll receiving support surface to be arranged in a circumferential direction of the movable scroll by using an embedding construction. Recessed areas are formed in a flat section of the movable-scroll receiving support surface, which faces the end wall of the movable scroll, along the circumferential direction of the movable scroll. The thrust plates are interfitted in their respective recessed areas so that the upper faces of the thrust plates slightly project from the openings of the recessed areas. In other words, the thrust plates supported with the bottom faces of the recessed areas each have a structure for receiving the end wall of the movable scroll. As this structure uses a plurality of disc-like thin parts, it has the advantage that the thrust receiving structure itself is compact.
- Preferably, in order to maintain the compression performance, the movable scroll orbits around the axis of the fixed scroll while keeping a parallel attitude.
- In the structure disclosed in Unexamined Patent Publication No. 2005-291151, however, the thrust plates are supported with the bottom faces of the recessed areas, so that the movable scroll is inevitably affected by variation generated during the machining of the recessed areas.
- More specifically, the recessed areas are formed in the respective sections of the movable-scroll receiving support surface by machining. However, the machining is prone to generate variation in a depth direction. The thrust plates are the parts arranged along the circumferential direction of the movable scroll and supporting the movable scroll from the back face of the movable scroll. The depth-directional variation in the recessed areas emerges as an inclination of the movable scroll. This means that the movable scroll is engaged with the fixed scroll in an inclined position due to the thrust plates.
- This inclination of the movable scroll affects a compression stroke that is carried out between the fixed and movable scrolls and is liable to cause a deterioration in compression performance.
- It is an object of the present invention to provide a scroll compressor in which a movable scroll is supported from a back face with a plurality of thrust plates without being inclined.
- The scroll compressor according to the invention has a compression unit including a movable scroll made up by forming a vortical wrap in an end wall and a similar fixed scroll, and being capable of carrying out compression along with an orbiting movement of the movable scroll with the wraps of the scrolls engaged with each other; a movable-scroll receiving support surface formed on a back-face side of the end wall of the movable scroll and including a flat face opposite to the back face of the end wall; and a plurality of thrust plates that are scattered in the support surface along a circumferential direction of the movable scroll, slidably supports the back face of the end wall of the movable scroll, and receives a thrust load from the movable scroll. The thrust plates are fixed onto the flat face of the support surface so as to be supported with the flat face by using the flat face as reference.
- Since the invention has a structure in which the thrust plates are supported with the flat face of the scroll-receiving support surface that can be maintained with high accuracy, the movable scroll can be supported with the thrust plates from the back face without being unnecessarily inclined.
- It is therefore possible to suppress a reduction in compression performance, which is caused by inclination of the movable scroll, and then to improve the compression performance of the scroll compressor.
- Preferably, according to the scroll compressor of the invention, each of the thrust plates has a projection protruding toward the support surface, and the support surface has a hole that opens toward the corresponding thrust plate. Each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
- With this scroll compressor, the thrust plates are firmly fixed onto the flat face of a scroll-receiving support surface without inclining the thrust plates with a simple structure.
- Preferably, according to the scroll compressor of the invention, the support surface has a projection protruding toward the corresponding thrust plate, and each of the thrust plates has a hole that opens toward the support surface. Each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
- With this scroll compressor, the thrust plates are firmly fixed onto the flat face of the scroll-receiving support surface without inclining the thrust plates with a simple structure.
-
FIG. 1 is a normal sectional view of a scroll compressor according to a first embodiment of the invention; -
FIG. 2 is a sectional view taken along line II-II ofFIG. 1 ; -
FIG. 3 is a sectional view taken along line III-III ofFIG. 2 ; -
FIG. 4 is an exploded perspective view showing a fixing structure of a thrust plate; -
FIG. 5 is a sectional view showing a substantial part of a second embodiment of the invention; and -
FIG. 6 is an exploded perspective view showing a fixing structure of a thrust plate according to the second embodiment. - The invention will be described with reference to a first embodiment shown in
FIGS. 1 to 4 . -
FIG. 1 is a normal sectional view of a scroll compressor, or for example, an electric scroll compressor for vehicle air-conditioning.FIG. 2 is a sectional side view taken along line II-II ofFIG. 1 .FIG. 3 is a partially sectional view taken along line ofFIG. 2 .FIG. 4 shows a fixing structure of a thrust plate. - In
FIG. 1 ,reference mark 1 represents a housing of the scroll compressor. Thehousing 1 is constructed by serially connecting a compression-unit casing 1 a having a shape of a cylinder with a bottom to a similar electric-unit casing 1 b with a cylindrical middle casing 1 c disposed therebetween. - A
compression unit 5 is installed in the compression-unit casing 1 a. Thecompression unit 5 has a structure in which afixed scroll 3 disposed on the bottom side of the casing 1 a is engaged with a movable scroll 4 disposed on the opening side. More specifically, thefixed scroll 3 and the movable scroll 4 each have a structure in which avortical wrap 8 is disposed, for example, in acircular end wall 7. In the center of the back face of theend wall 7 of the movable scroll 4, there is acylindrical boss 11 in which aneccentric bush 10 is rotatably fitted. Awrap 8 of thefixed scroll 3 and awrap 8 of the movable scroll 4 are engaged with each other. A crescent-shaped compression chamber 12 having capacity varied along with an orbiting movement of the movable scroll 4 is formed between thewraps 8. - In the middle casing 1 c, there is formed a cylindrical protruding portion that protrudes close to the
end wall 7 of the movable scroll 4. The protruding portion serves as a movable-scroll receiving support surface 13 (hereinafter, referred to as a support surface 13) that receives the movable scroll 4. Thesupport surface 13 has a tip end face that is formed of a ring-likeflat face 13 a parallel with theend walls 7 of the fixed andmovable scrolls 3 and 4. Needless to say, theflat face 13 a is situated closely opposite to a back face 7 a of theend wall 7. - An
electric unit 17 formed by interlocking arotor 15 and astator 16 together is installed in the electric-unit casing 1 b to be located on the opening side. On the bottom side, there is disposed aninverter unit 18 for controlling the electric unit. Therotor 15 has ashaft 15 a including both ends rotatably supported withbearings unit casing 1 b and the middle casing 1 c. In theshaft 15, aneccentric pin 21 is set in an eccentric position of a shaft end of a shaft 10 a supported with the middle casing 1 c. - The
eccentric pin 21 is inserted in an eccentric aperture located in an eccentric position of theeccentric bush 10 of the movable scroll 4. In result, when the rotation of therotor 15 is transmitted through theeccentric bush 10 to the movable scroll 4, the movable scroll 4 orbits around an axis of the fixedscroll 3 to vary the capacity of the crescent-shapedcompression chamber 12, to thereby compress a to-be-compressed fluid such as refrigerant. The movable scroll 4 does not rotate on its axis and is capable of making an orbiting movement only, by using four pin-type rotation-suppressingdevices 22 situated between theend wall 7 of the movable scroll and thesupport surface 13 as illustrated inFIGS. 1 and 2 . - As illustrated in
FIGS. 1 and 2 , a plurality ofthrust plates 25 are scattered along a circumferential direction of the movable scroll 4 between the back face 7 a of theend wall 7 of the movable scroll 4 and the ring-likeflat face 13 a. Each of thethrust plates 25 is made up of a thin circular member (having, for example, a diameter of about 10 mm and a thickness of about 2 mm). - The fixing of the
thrust plate 25 uses a structure that supports theentire thrust plate 25 by using theflat face 13 a of thesupport surface 13 as reference plane, in which accuracy can be easily obtained. In this structure, a projection such as a short-columnar projection 28 is formed in either alower face 25 a (one side face opposite to theflat face 13 a) of thethrust plate 25 or theflat face 13 a (face opposite to thelower face 25 a) of thesupport surface 13 as shown inFIGS. 3 and 4 . In the other face, there is formed a hole such as a hole in which the entire protrudingprojection 28 is fitted, or more specifically, aninterfitting hole 29. - The above-mentioned structure will be described in detail. For example, as illustrated in
FIGS. 3 and 4 , the short-columnar projection 28 is integrally formed in the center (substantially center) of thelower face 25 a of thethrust plate 25. Acylindrical interfitting hole 29 with a bottom is formed in each point on theflat face 13 a, which coincides with the correspondingprojection 28. Theinterfitting hole 29 has an internal diameter size corresponding to an external diameter of theprojection 28 and a depth that is longer than a projection length of theprojection 28. Letter H inFIG. 3 indicates the depth of theinterfitting hole 29. Theprojection 28 is slidably (rotatably) interfitted in theinterfitting hole 29. Theentire projection 28 protruding from thelower face 25 a is received in theinterfitting hole 29. Thethrust plate 25 is thus positioned at a predetermined point, and thelower face 25 a of thethrust plate 25 abuts against theflat face 13 a. Thethrust plate 25 is thus disposed (placed) to be superimposed upon theflat face 13 a. Theentire thrust plate 25 is supported with theflat face 13 a of thesupport surface 13 from the lower side, and is positioned at a predetermined position. In short, thethrust plate 25 is fitted onto theflat face 13 a by using theflat face 13 a as reference. - The
thrust plate 25 supported with theflat face 13 a supports theend wall 7 of the movable scroll 4 from the back-face side, and receives a thrust load applied to the movable scroll 4. - In the scroll compressor, the
rotor 15 rotates when theelectric unit 17 is excited. The rotation is transmitted from theshaft 15 a through theeccentric pin 21 to the movable scroll 4. The movable scroll 4 then orbits around the axis of the fixedscroll 3, and compresses the to-be-compressed fluid such as refrigerant by varying the capacity of thecompression chamber 12 located between thewraps 8. - During the compression, the thrust load applied to the movable scroll 4 is received by the plurality of
thrust plates 25 supporting theend wall 7. - At this time point, the
thrust plate 25 is superimposed upon theflat face 13 a. In other words, thethrust plate 25 is positioned by using theflat face 13 a as reference. - For that reason, even if there generates variation in the depth direction of the
interfitting hole 29 due to the machining of recessed areas, thethrust plate 25 is not affected by the variation. This means that thethrust plate 25 is not inclined. This is because theflat face 13 a upon which thethrust plate 25 is superimposed is a section in which high accuracy is easily obtained. - The movable scroll 4 is properly supported from the
thrust plates 25 located in any points by using theflat face 13 a as reference. The movable scroll 4 is therefore not inclined in relation to the fixedscroll 3, and always retains a predetermined attitude, or a proper fixed attitude suitable for compression. Consequently, the movable scroll 4 can satisfactorily carry out a desired compression performance in cooperation with the fixedscroll 3. - Moreover, the fixing of the
thrust plates 25 is carried out without difficulty since the interfitting structure in which theprojection 28 and theinterfitting hole 29 are fitted together is employed. -
FIGS. 5 and 6 show a second embodiment of the invention. - According to the present embodiment, unlike the first embodiment, a
pin member 35 is formed as a projection in theflat face 13 a of thesupport surface 13. In the center (substantially center) of the lower face of thethrust plate 25, there is formed a through-hole 36 piercing in thickness direction as a hole, whereby thethrust plate 25 is superimposed upon theflat face 13 a. - To be more concrete, the
pin member 35 projects towards the lower face of thethrust plate 25. The through-hole 36 has an internal diameter size corresponding to an external diameter of thepin member 35. As illustrated inFIGS. 5 and 6 , thepin member 35 is slidably (rotatably) interfitted in the through-hole 36, and theentire pin member 36 protruding from theflat face 13 aa is received in the through-hole 36. In result, thethrust plate 25 is positioned at a predetermined point as in the first embodiment, and theentire thrust plate 25 is supported from the lower side by using theflat face 13 a of thesupport surface 13 as reference similarly to the first embodiment. - For that reason, even with the structure opposite to that of the first embodiment in which the
pin member 35 and the through-hole 36 are fitted together, it is possible to prevent the inclination of the movable scroll 4 with a simple structure as in the first embodiment. - Members identical to those in the first embodiment are provided with identical reference marks in
FIGS. 5 and 6 , and descriptions thereof will be omitted. - The invention is not limited to the first and second embodiments, and may be modified in various ways without deviating from the gist of the invention. For example, the embodiments have a structure in which the projection and the through-hole are formed in the lower face of the thrust plate, and the hole and the pin member in the flat face. Instead of such a structure, the invention may have a structure in which the thrust plate is positioned by using the flat face of another support surface as reference.
Claims (3)
1. A scroll compressor comprising: a compression unit including a movable scroll made up by forming a vortical wrap in an end wall and a similar fixed scroll, and being capable of carrying out compression along with an orbiting movement of the movable scroll with the wraps of the scrolls engaged with each other;
a movable-scroll receiving support surface formed on a back-face side of the end wall of the movable scroll and including a flat face opposite to the back face of the end wall; and
a plurality of thrust plates that are scattered in the support surface along a circumferential direction of the movable scroll, slidably supports the back face of the end wall of the movable scroll, and receives a thrust load from the movable scroll, wherein:
the thrust plates are fixed onto the flat face of the support surface so as to be supported with the flat face by using the flat face as reference.
2. The scroll compressor according to claim 1 , wherein each of the thrust plates has a projection protruding toward the support surface; the support surface has a hole that opens toward the corresponding thrust plate; and each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
3. The scroll compressor according to claim 1 , wherein the support surface has a projection protruding toward the corresponding thrust plate; each of the thrust plates has a hole that opens toward the support surface; and each of the thrust plates is fixed onto the support surface by interfitting the corresponding projection into the corresponding hole.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-152679 | 2007-06-08 | ||
JP2007152679A JP2008303819A (en) | 2007-06-08 | 2007-06-08 | Scroll compressor |
PCT/JP2008/059468 WO2008152896A1 (en) | 2007-06-08 | 2008-05-22 | Scroll compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100183465A1 true US20100183465A1 (en) | 2010-07-22 |
Family
ID=40129508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/663,682 Abandoned US20100183465A1 (en) | 2007-06-08 | 2008-05-22 | Scroll Compressor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100183465A1 (en) |
JP (1) | JP2008303819A (en) |
DE (1) | DE112008001546B4 (en) |
WO (1) | WO2008152896A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090320283A1 (en) * | 2003-03-26 | 2009-12-31 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Suction filter, turbo compressor, and method for compact assembling of the same |
CN107906002A (en) * | 2017-12-15 | 2018-04-13 | 山东元清机电科技有限公司 | A kind of compressor anti-rotation mechanism |
US10634141B2 (en) | 2014-09-17 | 2020-04-28 | Bitzer Kuehlmaschinenbau Gmbh | Scroll compressor having axial guide support |
US20200318638A1 (en) * | 2017-09-05 | 2020-10-08 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Method for manufacturing compressor casing, casing blank, and compressor casing |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011089507A (en) | 2009-10-26 | 2011-05-06 | Sanden Corp | Scroll fluid machine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4435137A (en) * | 1980-04-05 | 1984-03-06 | Sanden Corporation | Scroll-type fluid compressor with scroll stabilizing mechanism |
US5470213A (en) * | 1993-04-13 | 1995-11-28 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Scroll type compressor having a ring for compressive force transmission and orbit determination |
US6461120B2 (en) * | 1999-12-21 | 2002-10-08 | Denso Corporation | Sealed-type electric compressor having refrigerant passage |
US6589035B1 (en) * | 1996-10-04 | 2003-07-08 | Hitachi, Ltd. | Scroll compressor having a valved back-pressure chamber and a bypass for over-compression |
US20050220651A1 (en) * | 2004-04-02 | 2005-10-06 | Sanden Corporation | Scroll type hydraulic machine |
US7195470B2 (en) * | 2003-12-19 | 2007-03-27 | Kabushiki Kaisha Toyota Jidoshokki | Scroll compressor having a supply passage connecting the back pressure chamber to discharge pressure region and passing a clearance at a sliding portion |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63289279A (en) * | 1987-05-20 | 1988-11-25 | Tokico Ltd | Scroll type fluid machinery |
JP2592344Y2 (en) * | 1993-04-13 | 1999-03-17 | 株式会社豊田自動織機製作所 | Scroll compressor |
JP2000220582A (en) * | 1999-01-29 | 2000-08-08 | Sanyo Electric Co Ltd | Scroll fluid machine |
JP2005248925A (en) * | 2004-03-08 | 2005-09-15 | Sanden Corp | Scroll type fluid machine |
-
2007
- 2007-06-08 JP JP2007152679A patent/JP2008303819A/en active Pending
-
2008
- 2008-05-22 DE DE112008001546T patent/DE112008001546B4/en not_active Expired - Fee Related
- 2008-05-22 WO PCT/JP2008/059468 patent/WO2008152896A1/en active Application Filing
- 2008-05-22 US US12/663,682 patent/US20100183465A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4435137A (en) * | 1980-04-05 | 1984-03-06 | Sanden Corporation | Scroll-type fluid compressor with scroll stabilizing mechanism |
US5470213A (en) * | 1993-04-13 | 1995-11-28 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Scroll type compressor having a ring for compressive force transmission and orbit determination |
US6589035B1 (en) * | 1996-10-04 | 2003-07-08 | Hitachi, Ltd. | Scroll compressor having a valved back-pressure chamber and a bypass for over-compression |
US6461120B2 (en) * | 1999-12-21 | 2002-10-08 | Denso Corporation | Sealed-type electric compressor having refrigerant passage |
US7195470B2 (en) * | 2003-12-19 | 2007-03-27 | Kabushiki Kaisha Toyota Jidoshokki | Scroll compressor having a supply passage connecting the back pressure chamber to discharge pressure region and passing a clearance at a sliding portion |
US20050220651A1 (en) * | 2004-04-02 | 2005-10-06 | Sanden Corporation | Scroll type hydraulic machine |
US7214043B2 (en) * | 2004-04-02 | 2007-05-08 | Sanden Corporation | Scroll type hydraulic machine |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090320283A1 (en) * | 2003-03-26 | 2009-12-31 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Suction filter, turbo compressor, and method for compact assembling of the same |
US7967551B2 (en) * | 2003-03-26 | 2011-06-28 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Suction filter, turbocompressor, and method for compact assembling of the same |
US10634141B2 (en) | 2014-09-17 | 2020-04-28 | Bitzer Kuehlmaschinenbau Gmbh | Scroll compressor having axial guide support |
US11396877B2 (en) | 2014-09-17 | 2022-07-26 | Bitzer Kuehlmaschinenbau Gmbh | Scroll compressor having axial guide support |
US20200318638A1 (en) * | 2017-09-05 | 2020-10-08 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Method for manufacturing compressor casing, casing blank, and compressor casing |
US11454236B2 (en) * | 2017-09-05 | 2022-09-27 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Method for manufacturing compressor casing, casing blank, and compressor casing |
CN107906002A (en) * | 2017-12-15 | 2018-04-13 | 山东元清机电科技有限公司 | A kind of compressor anti-rotation mechanism |
Also Published As
Publication number | Publication date |
---|---|
WO2008152896A1 (en) | 2008-12-18 |
DE112008001546B4 (en) | 2012-06-14 |
DE112008001546T5 (en) | 2010-04-22 |
JP2008303819A (en) | 2008-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SANDEN CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOBAYASHI, EIJI;OSAKA, MASAHIKO;REEL/FRAME:023634/0022 Effective date: 20091112 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |