WO2015152832A1 - Compresseur et son procédé de fabrication - Google Patents

Compresseur et son procédé de fabrication Download PDF

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Publication number
WO2015152832A1
WO2015152832A1 PCT/SG2015/050059 SG2015050059W WO2015152832A1 WO 2015152832 A1 WO2015152832 A1 WO 2015152832A1 SG 2015050059 W SG2015050059 W SG 2015050059W WO 2015152832 A1 WO2015152832 A1 WO 2015152832A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
drive shaft
compressor
rotor
housing
Prior art date
Application number
PCT/SG2015/050059
Other languages
English (en)
Inventor
Xiaoyong Wang
Peng Kong CHEE
Raymond Soon Huat CHEOW
Original Assignee
Sanden International (Singapore) Pte Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanden International (Singapore) Pte Ltd filed Critical Sanden International (Singapore) Pte Ltd
Publication of WO2015152832A1 publication Critical patent/WO2015152832A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0895—Component parts, e.g. sealings; Manufacturing or assembly thereof driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1054—Actuating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block

Definitions

  • the present invention related broadly to a compressor and a method of manufacturing a compressor.
  • a compressor is a device that is capable of reducing the volume of a compressible fluid such as a refrigerant.
  • a compressible fluid such as a refrigerant.
  • One of the various types of compressors is the wobbling plate compressor, in which a rotating motion of a drive shaft, e.g. from an internal combustion engine or electric motor, is converted into a reciprocating motion to drive one or more pistons of the compressor.
  • FIG. 1 shows a schematic diagram illustrating a cross-sectional view of a conventional wobble plate compressor 100.
  • the wobble plate compressor 1 00 includes a housing 102 that encloses a sub-assembly having a drive shaft 104, a cam rotor 106 attached to the drive shaft 104, a wobble plate (also referred to as planet plate) 1 08 in sliding engagement with the cam rotor 106, and a plurality of rods 1 1 0 each coupled to the wobble plate 108 at one end.
  • the other end of each of the plurality of rods 1 10 is coupled to a piston 1 12 disposed in a respective cylinder 1 14 formed in the housing 102.
  • the compressor 1 00 further includes a gear mechanism 1 16 to decouple the rotational movement of the cam rotor 106 from the wobble plate 108, such that, during operation, the wobble plate 108 does not rotate together with the cam rotor 106.
  • the gear mechanism 1 16 includes a first gear 1 18 attached to the wobble plate 108 and a second gear 120 formed at one end of a spring-loaded shaft 122, which is coaxial with the drive shaft 104, and which is rotationally fixed, e.g. by having a fixed key.
  • the wobble plate 108 rocks back and forth about a round spacer 1 24, the first gear 1 18 is engaged with the second gear 1 20, but is prevented from rotating since the second gear 120 is rotationally fixed together with the shaft 122.
  • the compressor 100 can operate by rotating the drive shaft 1 04 only in one direction, but not in the opposite direction. Also, the meshing of the gear teeth in the gear mechanism 1 16 creates inherent peak noise during operation, which may render the compressor 100 unsuitable for use in certain quiet settings.
  • FIG 2 shows a schematic diagram illustrating a cross-sectional view of another conventional wobble plate compressor 200 which attempts to overcome the above drawbacks.
  • the compressor 200 is largely similar to the compressor 100 described above with respect to Figure 1 , except that the gear mechanism 1 16 is replaced by a combination of a shaft 202 having a ball-shaped head 204 and a slider 206 attached to the wobble plate 208 that rotationally locks the wobble plate 208. More specifically, as the wobble plate 208 rocks back and forth, the slider 206 can slide along a track 21 0 that extends along a direction parallel to the direction of the drive shaft 212.
  • the compressor 200 can operate by rotating the drive shaft 212 clockwise or anticlockwise.
  • the noise level generated by the compressor 200 remains high, especially at high speeds, due to the contact between the wobble plate 208 and the ball-shaped head 204, as well as the rotation of the drive shaft 212 and cam rotor 214 about a single bearing support.
  • a compressor comprising:
  • a housing defining a plurality of compression chambers
  • an elongated drive shaft extending along an axial direction through the housing; a cam rotor attached to the drive shaft, the cam rotor having a cam surface inclined at a cam angle to the axial direction of the drive shaft;
  • the drive shaft extends through the cam rotor and the cam follower, the drive shaft being supported by the housing on both sides of the cam rotor;
  • drive shaft is operable to rotate the cam rotor, the cam rotor rocking the cam follower back and forth, thereby driving each piston to reciprocate in its associated compression chamber.
  • the compressor may further comprise bearings disposed between the cam rotor and the cam follower to slidably engage the cam rotor with the cam follower.
  • the weight of the cam rotor may be distributed substantially uniformly about the drive shaft.
  • the cam angle of the cam surface may be adjustable for adjusting a reciprocating distance travelled by each piston.
  • the compressor may further comprise a snap ring for securing the cam follower in sliding engagement with the cam surface of the cam rotor.
  • the drive shaft may be bidirectionally operable.
  • an air-conditioning unit comprising the compressor as defined in the first aspect.
  • a refrigeration unit comprising the compressor as defined in the first aspect.
  • a method of manufacturing a compressor comprising the step of:
  • a housing defining a plurality of compression chambers; assembling a sub-assembly capable of converting a rotational motion to a reciprocating motion to the housing, the sub-assembly comprising:
  • cam rotor attached to the drive shaft, the cam rotor having a cam surface inclined at a cam angle to the axial direction of the drive shaft;
  • drive shaft is operable to rotate the cam rotor, the cam rotor rocking the cam follower back and forth, thereby driving each piston to reciprocate in its associated compression chamber;
  • the method may further comprise adjusting the cam angle of the cam surface for adjusting a reciprocating distance travelled by each piston.
  • Figure 1 shows a schematic diagram illustrating a cross-sectional view of a conventional wobble plate compressor.
  • Figure 2 shows a schematic diagram illustrating a cross-sectional view of another conventional wobble plate compressor.
  • Figure 3 shows a schematic diagram illustrating a cross-sectional view of a wobble plate compressor according to an example embodiment.
  • Figure 4 shows a perspective view of a subassembly for converting a rotating motion into a reciprocating motion in the compressor of Figure 3 according to an example embodiment.
  • Figure 5 shows a side view illustrating the cam rotor of Figure 3 as attached to the drive shaft of Figure 3 according to an example embodiment
  • Figure 6 shows a flow chart illustrating a method for manufacturing a compressor according to an example embodiment.
  • the example embodiments provide a wobble plate-typed compressor that is bidirectionally operable, whilst striving to address the noise and vibration issues, as well as a method of manufacturing such a compressor, and an air-conditioning unit or refrigeration unit having such a compressor.
  • FIG. 3 shows a schematic diagram illustrating a cross-sectional view of a wobble plate compressor 300 according to an example embodiment.
  • the compressor 300 includes a housing 302 that defines a plurality of compression chambers 304 (also known as cylinders 304), and a sub-assembly 306 capable of converting an input rotational motion to an output reciprocating motion for drawing and compressing a compressible fluid in the chambers 304.
  • a housing 302 attached to one side, for example front side 308, of the housing 302 is an compressor rotor 310 that provides the input rotational motion
  • a fluid manifold 314 that includes a fluid inlet for the uncompressed fluid and a fluid outlet for the compressed fluid.
  • the fluid manifold 314 may be connected to the compression chambers 304 using valves, for example, in a manner that would be appreciated by a person skilled in the art.
  • the housing 302 also includes mounting brackets 31 6a-d for mounting the compressor 300 to a support structure (not shown) such as one found in a vehicle.
  • the housing 302, compressor rotor 310 and fluid manifold 314 are of a similar construction as existing compressors of the same type, such that the compressor 300 can replace or substitute an existing compressor in an air-conditioning unit or refrigeration unit.
  • the sub-assembly 306 includes an elongated drive shaft 318 that extends through the housing 302, a cam rotor 320 attached to the a middle portion of the drive shaft 318, a cam follower in the form of a wobble plate or a planet plate 322 in sliding engagement with a cam surface of the cam rotor 320, and a plurality of pistons 324 each disposed in a respective compression chamber 304 and connected to the planet plate 322 by a respective rod 326.
  • One end of the drive shaft 318 adjacent the front side 308 of the housing 302 is coupled to the compressor rotor 31 0, while the other end adjacent the back side 312 of the housing 302 is limited from axial movement by adjustment means in the form of an adjustable screw 328, as described in detail below.
  • the drive shaft 318 is also supported by the housing 302 on both sides of the cam rotor 320, for example, by bearings 330 disposed adjacent the front side 308 and by bearings 332 disposed adjacent the back side 312.
  • the drive shaft 318 is thus bidirectionally rotatable and can be driven by the compressor rotor 310 to rotate the cam rotor 320, which slides against the planet plate 322.
  • the planet plate 322 is rotationally fixed, such that the planet plate 322 wobbles or rocks back and forth without rotating, thereby reciprocating the pistons 324 connected to the planet plate 322.
  • a slider 334 is attached to the planet plate 322, and as the planet plate 322 rocks back and forth, the slider 334 can only slide along a guide 336 formed in the housing 302 in a similar manner as described above with respect to Figure 2.
  • bearings 338 are disposed between the cam rotor 320 and the planet plate 322 to allow the cam rotor 320 to slidably engage with the planet plate 322.
  • the compressor 300 includes a continuous drive shaft 318 that extends from one end of the housing 302 to the other end, instead of a drive shaft that terminates in the middle of the housing as implemented in conventional compressors.
  • the vibration of created by the drive shaft 318 during operation is advantageously reduced, since it is supported at both ends. This can reduce the noise level generated by the compressor 300.
  • the adjustment screw 328 as shown in Figure 3 can be used to adjust the position of the drive shaft 318 relative to the housing 302. The main purpose of the adjustment screw 328 is to limit axial movement of the drive shaft 318 during compressor operation.
  • the adjustment screw 328 is first tightened to a predetermined torque to rotationally secure the drive shaft 318 while other components of the compressor 300 are being assembled, and then loosened by a predetermined angle to rotationally free the drive shaft 318 after the other components of the compressor 300 have been assembled.
  • the predetermined tightening torque and loosening angle in different embodiments may vary depending on factors such as the size of the compressor, speed of the drive shaft during operation, etc.
  • Figure 4 shows a perspective view of the sub-assembly 306 of the compressor 300 of Figure 3 according to an example embodiment.
  • the same reference numerals as used in Figure 3 are reused to denote the corresponding parts.
  • the drive shaft 318 extends through the cam rotor 320 and planet plate 322.
  • a snap ring 402 is used to secure the planet plate 322 in sliding engagement with the cam rotor 320.
  • the slider 330 that has an end portion 404 shaped to be received in, and to slide along, the guide 332 in Figure 3.
  • five pistons 324 and rods 326 are shown; however, it will be appreciated the number of pistons 324 and rods 326 may vary in alternate embodiments.
  • Figure 5 shows a side view illustrating the cam rotor 320 ( Figure 3) as attached to the drive shaft 31 8 ( Figure 3) according to an example embodiment.
  • the weight of the cam rotor 320 is distributed substantially uniformly about the drive shaft 31 8. This can help to ensure regular rotational movements by the drive shaft 318 and reduce vibration.
  • a cam angle 502 is formed between an inclined cam surface 504 defined by the cam rotor 320 and an axial direction 506 of the drive shaft 318.
  • the cam angle 502 may be adjustable in some implementations, for adjusting the reciprocating distance, or stroke, of the pistons 324 ( Figure 3), resulting in variable-displacement compressors. In other implementations, the cam angle 502 may be fixed, resulting in fixed displacement compressors.
  • the cam rotor 320 includes an engagement portion 508 for receiving the planet plate 322 and bearings 338 (Figure 3). When assembled, the planet plate 322 is in sliding engagement with the cam surface 504. In addition, a groove 510 is formed on the engagement portion 508 to receive the snap ring 402 ( Figure 4) that secures the planet plate 322 in sliding engagement with the cam surface 504.
  • the compressor of the example embodiments can reduce the number of parts used by using a single continuous drive shaft, resulting a reduced weight as compared to conventional compressors.
  • the sliding engagement between the cam rotor and the planet plate can be achieved using bearings, instead of more complex parts such as gears and ball-shaped shaft used in conventional compressors.
  • manufacturing and maintenance can be simplified and more cost-effective.
  • the noise level can be advantageously lowered, making the compressor of the example embodiments suitable for use in quiet settings.
  • the compressor can be used in an air-conditioning unit or a refrigeration unit of a vehicle or vessel.
  • Figure 6 shows a flow chart 600 illustrating a method for manufacturing a compressor according to an example embodiment.
  • a housing is formed, the housing defining a plurality of compression chambers.
  • a sub-assembly capable of converting a rotational motion to a reciprocating motion is assembled to the housing.
  • the sub-assembly includes an elongated drive shaft extending along an axial direction through the housing; a cam rotor attached to the drive shaft, the cam rotor having a cam surface inclined at a cam angle to the axial direction of the drive shaft; a cam follower in sliding engagement with the cam surface; and a plurality of pistons connected to the cam follower, each piston associated with a respective one of the compression chambers; wherein the drive shaft is operable to rotate the cam rotor, the cam rotor rocking the cam follower back and forth, thereby driving each piston to reciprocate in its associated compression chamber.
  • the drive shaft is supported by the housing on both sides of the cam rotor, the drive shaft extending through the cam rotor and the cam follower.
  • the cam follower is rotationally fixed relative to the housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un compresseur et un procédé de fabrication d'un compresseur. Le compresseur comprend un logement définissant une pluralité de chambres de compression ; un arbre d'entraînement allongé s'étendant le long d'une direction axiale à travers le logement ; un rotor à cames fixé à l'arbre d'entraînement, le rotor à cames ayant une surface de came inclinée au niveau d'un angle de came vers la direction axiale de l'arbre d'entraînement ; un suiveur de came fixe en rotation en prise de façon coulissante avec la surface de came ; et une pluralité de pistons raccordés au suiveur de came, chaque piston étant associé à l'une respective des chambres de compression. L'arbre d'entraînement s'étend à travers le rotor à cames et le suiveur de cames, et est supporté par le boîtier sur les deux côtés du rotor à cames. De plus, l'arbre d'entraînement peut être utilisé pour faire tourner le rotor à cames, le rotor à cames, le rotor à cames faisant basculer le galet de came vers l'avant et vers l'arrière, ce qui permet d'entraîner ainsi chaque piston en va-et-vient dans sa chambre de compression associée.
PCT/SG2015/050059 2014-04-04 2015-04-02 Compresseur et son procédé de fabrication WO2015152832A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1406146.9A GB2524834A (en) 2014-04-04 2014-04-04 A compressor and method of manufacturing the same
GB1406146.9 2014-04-04

Publications (1)

Publication Number Publication Date
WO2015152832A1 true WO2015152832A1 (fr) 2015-10-08

Family

ID=50776869

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2015/050059 WO2015152832A1 (fr) 2014-04-04 2015-04-02 Compresseur et son procédé de fabrication

Country Status (2)

Country Link
GB (1) GB2524834A (fr)
WO (1) WO2015152832A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475871A (en) * 1982-08-02 1984-10-09 Borg-Warner Corporation Variable displacement compressor
US4586874A (en) * 1983-12-23 1986-05-06 Sanden Corporation Refrigerant compressor with a capacity adjusting mechanism
US4632640A (en) * 1984-02-21 1986-12-30 Sanden Corporation Wobble plate type compressor with a capacity adjusting mechanism
US4776259A (en) * 1985-09-20 1988-10-11 Sanden Corporation Rotation preventing mechanism of wobble plate type compressor
US4850811A (en) * 1987-07-28 1989-07-25 Sanden Corporation Compressor with variable displacement mechanism
US4874295A (en) * 1987-03-24 1989-10-17 Sanden Corporation Slant plate type compressor with variable displacement mechanism
US5131319A (en) * 1990-02-19 1992-07-21 Sanden Corporation Wobble plate type refrigerant compressor having a ball-and-socket joint lubricating mechanism
US6012905A (en) * 1997-02-25 2000-01-11 Sanden Corporation Suction and discharge valve mechanism for fluid displacement apparatus
US6102670A (en) * 1997-09-05 2000-08-15 Sanden Corporation Apparatus and method for operating fluid displacement apparatus with variable displacement mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB636201A (en) * 1946-03-08 1950-04-26 Schweizerische Lokomotiv Improvements in or relating to axial-piston pump
JPH0235983U (fr) * 1988-08-26 1990-03-08
JP5022305B2 (ja) * 2008-05-23 2012-09-12 サンデン株式会社 揺動板式可変容量圧縮機

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475871A (en) * 1982-08-02 1984-10-09 Borg-Warner Corporation Variable displacement compressor
US4586874A (en) * 1983-12-23 1986-05-06 Sanden Corporation Refrigerant compressor with a capacity adjusting mechanism
US4632640A (en) * 1984-02-21 1986-12-30 Sanden Corporation Wobble plate type compressor with a capacity adjusting mechanism
US4776259A (en) * 1985-09-20 1988-10-11 Sanden Corporation Rotation preventing mechanism of wobble plate type compressor
US4874295A (en) * 1987-03-24 1989-10-17 Sanden Corporation Slant plate type compressor with variable displacement mechanism
US4850811A (en) * 1987-07-28 1989-07-25 Sanden Corporation Compressor with variable displacement mechanism
US5131319A (en) * 1990-02-19 1992-07-21 Sanden Corporation Wobble plate type refrigerant compressor having a ball-and-socket joint lubricating mechanism
US6012905A (en) * 1997-02-25 2000-01-11 Sanden Corporation Suction and discharge valve mechanism for fluid displacement apparatus
US6102670A (en) * 1997-09-05 2000-08-15 Sanden Corporation Apparatus and method for operating fluid displacement apparatus with variable displacement mechanism

Also Published As

Publication number Publication date
GB2524834A (en) 2015-10-07
GB201406146D0 (en) 2014-05-21

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