US20030118457A1 - Swash-plate compressor and its housing - Google Patents
Swash-plate compressor and its housing Download PDFInfo
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- US20030118457A1 US20030118457A1 US10/071,690 US7169002A US2003118457A1 US 20030118457 A1 US20030118457 A1 US 20030118457A1 US 7169002 A US7169002 A US 7169002A US 2003118457 A1 US2003118457 A1 US 2003118457A1
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- United States
- Prior art keywords
- housing
- swash
- cylinder block
- lubricating oil
- mixed gas
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- 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.)
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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
- 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
- F04B27/109—Lubrication
Definitions
- the present invention relates to a swash-plate compressor to be used for an automobile air-conditioning system.
- a swash-plate compressor one of compressors incorporated into an automobile air-conditioning system to perform a compressing operation, rotation of a shaft to be driven to rotate when subjected to rotational power of a vehicle engine is converted into reciprocation of a plurality of pistons disposed around the shaft in parallel thereto.
- a circular swash plate is attached to the shaft so as to diagonally intersect the shaft, and each piston is provided with a recess for receiving a part of the swash plate, each piston and the swash plate being brought into contact through bearing members disposed in the recess of each piston.
- This supply route includes a screw hole provided at the shaft and opening at its one end as well as a plurality of holes communicating with the screw hole and opening toward the thrust bearing (Japanese Patent Appln. Public Disclosure No. 6-101641).
- An object of the present invention is to provide a structure for introducing a large quantity of lubricating oil into recesses of pistons which receive a part of the swash plate of a swash-plate compressor.
- This invention relates to a housing for a swash-plate compressor which comprises: a top portion defining a passage for a mixed gas of a refrigerant and lubricating oil to be introduced into the swash-plate compressor and a valve such as a solenoid valve attached to the top portion.
- the top portion has at least one barrier with which the mixed gas can collide, a recess for reserving the lubricating oil in the mixed gas adhering to the barrier by collision with the barrier and flowing down along the barrier, and a hole communicating with the recess and the inner space of the housing.
- the valve performs opening and closing of the hole.
- the mixed gas by absorption of the mixed gas from the exterior of the housing toward its interior, the mixed gas is introduced into a passage of a top portion of the housing and floats in the passage. At this time, a part of the mixed gas collides with a barrier in the passage, causing its lubricating oil ingredient to adhere to the barrier.
- the lubricating oil adhered to the barrier flows down into a recess of the passage along the barrier. Consequently, during operation of the swash-plate compressor, the lubricating oil ingredients are reserved inside the recess.
- the lubricating oil reserved in the recess can be made to run down through the hole communicating with the recess.
- the lubricating oil running down from the hole goes down on a cylinder block which occupies the inner space of the housing, flows into one or plural cylinders through an opening in the peripheral wall face of the cylinder block, goes down the peripheral face of a piston inside the cylinder, and reaches the inside of a cavity of the piston. If one of the openings of the cylinder block is disposed to confront the hole of the housing top, the lubricating oil running down reaches the inside of the cylinder directly through the opening.
- FIG. 1 is a partial vertical section of the swash-plate compressor according to the present invention.
- FIG. 2 is a cross section obtained along the line 2 - 2 of FIG. 1.
- FIG. 3 is a cross section obtained along the line 3 - 3 of FIG. 1.
- a swash-plate compressor to be loaded on an automobile is generally shown by a reference numeral 10 .
- the swash-plate compressor 10 is driven when subjected to rotational power of an on-vehicle engine (not shown).
- the rotational power is transmitted to the shaft 16 through a belt (not shown) to rotate the shaft.
- a clutch apparatus (not shown) is attached to the front end portion of the shaft 16 .
- the housing 12 comprises a body 24 which defines a housing space of the cylinder block 14 and having a generally cylindrical inner face, a top portion 26 following an upper portion of the body 24 to project upward therefrom, a tubular portion 28 with a reduced diameter following one end portion in the axial direction of the body 24 and projecting from the one end portion to surround the front end portion of the shaft 16 , and a cap 30 secured to and covering an open end portion (the other end portion) of the body 24 .
- the housing 24 has in its upper and lower portions two cavities communicating with the housing space of the cylinder block 14 (however, only the upper cavity 31 is shown). Both cavities are substantially in the intermediate part of both end portions of the body 24 and positioned right above and right below the cylinder block 14 .
- the upper cavity 31 of the housing body receives the mixed gas to be introduced through a passage 32 mentioned later of the housing top 26 and serves to distribute it toward both ends of each cylinder 20 .
- the cavity in the bottom portion acts as an oil pan which can store the lubricating oil.
- the housing top 26 defines the passage 32 for the mixed gas to be introduced into the swash-plate compressor.
- the passage 32 begins with an opening 34 provided at the top portion 26 (in more detail, a cover 40 to be described later) and opening in the exterior of the housing 12 and ends with another opening 36 provided in the housing body 24 and opening into the upper cavity 31 . Consequently, the mixed gas is introduced from the opening 34 into the passage 32 and can move from the other opening 36 through the passage 32 into the housing body 24 .
- the top portion 26 has a generally rectangular plane shape (see FIG. 3) and includes side walls 38 extending upward from the housing body 24 and having a rectangular cross sectional shape, and a cover 40 which covers the open top face of the side walls and closes and which is secured to the side walls 38 so as to be integral with the side walls 38 . Consequently, the housing body 24 also defined a part of the top portion 26 .
- the top portion 26 may have another plane shape, for example, such as a polygonal and a circular shapes in place of the illustrated rectangular shape.
- the four barriers 42 are arranged at intervals from each other between both ends 34 , 36 of the passage 32 .
- Each barrier 42 extends vertically upward from the housing body 24 toward the cover 40 and ends immediately before reaching the cover 40 . Therefore, the mixed gas to be introduced into the passage 32 during operating of the swash-plate compressor 10 collides with each barrier 42 while passing through the passage 32 and flows through a clearance between each barrier 42 and the cover 40 .
- the mixed gas collides with the barrier 42 a part of the lubricating oil which is an ingredient of the mixed gas adheres to the barrier 42 . Then, the lubricating oil adhered to the barrier 42 flows down the barrier 42 along its wall face into the recess 44 to be stored in the recess 44 .
- the recess 44 is defined by a part of the side walls 38 of the top portion and the outermost barrier 42 close to the opening 36 in the housing body 24 .
- the recess 44 can be formed, in place of this embodiment, by setting the thickness of a part of the housing body 24 larger and forming a sunken place therein.
- the outermost barrier 42 extends from one side of confronting both wall faces of the side walls 38 of the top portion to the other side.
- the other three barriers 42 extend alternately from one of both the wall faces of the side walls 38 to portions immediately before the other, with clearances between these barriers 42 and the other side wall. Therefore, the lubricating oil stored in the recess 44 can move through the clearances to the portion between the barriers 42 , thereby keeping constant the height of the level of the lubricating oil stored in the recess.
- each barrier 42 in place of the illustrated embodiment, extend from the cover 40 in the opposite direction toward the housing body 24 . Also, each barrier 42 may be made to extend not vertically but diagonally or with a curve.
- the lubricating oil stored in the recess 44 can be exhausted out of the recess 44 through the hole 46 .
- the hole 46 is formed in the housing body 24 and communicates with the recess 44 and the inner space of the housing body 24 . Consequently, the lubricating oil in the recess 44 can be made to go down onto the cylinder block 14 within the housing body 24 .
- the hole 46 is opened and closed by operating a valve, preferably a solenoid valve 45 .
- the solenoid valve 45 is secured to the cover 40 .
- the solenoid valve 45 has a valve body 47 which can go up and down within the passage 32 , and the valve body 47 opens or closes the hole 46 by its up-and-down action.
- the valve body 47 can be made to go up and down by electrically controlling the solenoid valve 45 .
- the solenoid valve 45 is preferably controlled to open the hole 46 by elevating the valve body 47 for several seconds before starting (activating) the swash-plate compressor 10 which had stopped for a long time. Instead of this, it is also possible to operate the solenoid valve 45 every time the swash plate compressor 10 is activated while an automobile is driven.
- the hole 46 may be provided in an arbitrary position in the axial direction of the housing body 24 but is preferably provided in the central position in the axial direction of the housing body 24 , as shown in the drawings. By this, the hole 46 can be made to be close or to oppose to an opening 62 to be described later which is provided in the cylinder block 14 and communicates with the cylinder 20 .
- the lubricating oil going down onto the cylinder block 14 runs down along the periphery of the cylinder block 14 and reaches the opening 62 , or enters directly into the opening 62 as described later. Thereafter, the lubricating oil enters the cylinder 20 , runs down along the periphery of the cylinder, and reaches a connecting portion (a boss 64 to be described later) between the shaft 16 and the swash plate 18 within the cavity 70 to be described later of the piston 22 .
- a plurality of cylinders 20 provided in the cylinder block 14 are arranged at intervals from each other about the axis of the cylinder block 14 .
- Each cylinder 20 opens at both ends of the cylinder block 14 , and both ends of the cylinder 20 , i.e., both ends of the cylinder block 14 are respectively brought into contact with a cap 30 of the housing and one end portion of the housing body 24 through a pair of valve plates 48 , 50 .
- the housing cap 30 and the one end portion of the housing body 24 respectively have two concentric annular spaces (only annular spaces 52 , 54 provided in the cap 30 are shown) confronting both valve plates 48 , 50 .
- the inner annular space 52 communicates with the upper cavity 31 of the housing body and can receive the mixed gas.
- the outer annular space 54 can receive the mixed gas discharged out of the cylinder 20 .
- the letters L and H respectively meaning low pressure and high pressure are put in the annular spaces 52 , 54 .
- both valve plates 48 , 50 there are provided two holes 56 , 58 allowing the mixed gas to move between the annular spaces 52 , 54 and each cylinder 20 .
- a check valve (not shown) to control flowing of the mixed gas is disposed.
- both annular spaces on the high pressure side (H) of the housing body 24 communicate with each other through a tube (not shown) inserted into a hole penetrating the cylinder block 14 in its axial direction.
- the mixed gas discharged into the annular space on the high pressure side is exhausted outside the housing 12 from an outlet 60 provided in the cap 30 of the housing and communicating with the annular space 54 on the cap side.
- the cylinder block 14 is provided with an elongated opening 62 communicating with each cylinder 20 .
- Each opening 62 is placed substantially in the central portion of each cylinder 20 in its axial direction.
- one cylinder 20 is placed uppermost with its opening 62 confronting the hole 46 for the lubricating oil. Therefore, the lubricating oil flowing down from the hole 46 drops directly into the opening 62 .
- the swash plate 18 for converting the rotation of the shaft 16 into the reciprocation of each piston 22 includes a boss portion 64 surrounding the shaft 16 and secured thereto, and a disk portion 66 extending from the boss portion.
- the reference numeral 68 shows a pair of thrust bearings disposed in contact with both ends of the boss portion 64 to surround the shaft 16 .
- the disk portion 66 of the swash plate is inclined to the shaft 16 . That is, the disk portion 66 forms a crossed axes angle other than 90 ° relative to the shaft 16 . Therefore, when the swash plate 18 rotates together with the shaft 16 , an arbitrary portion relative to the circumferential direction of the disk portion 66 in contact with each piston 22 changes with respect to the axial direction of the shaft 16 . As a result, each piston 22 receives axial force from the disk portion 66 .
- Each piston 22 disposed within each cylinder 20 of the cylinder block has a cavity 70 for receiving the disk portion 66 of the swash plate 18 .
- each cavity 70 there are disposed a disk-like shoe 72 which is a bearing member in contact with each face of the disk portion 66 , and a ball 74 rotatably held on the shoe 72 and the wall face which defines the cavity 70 .
- the disk portion 66 is brought into contact with each piston 22 (in more detail, with the wall face of the cavity 70 ).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
This swash-plate compressor (10) has a housing (12). The housing comprises a top portion (26) defining a passage (32) for a mixed gas of a refrigerant and lubricating oil to be introduced into its interior, and a valve (45) such as a solenoid valve attached to the top portion. The top portion (26) has at least one barrier (42) which is provided within the passage and with which the mixed gas can collide, a recess (44) for reserving the lubricating oil in the mixed gas which flows down, and a hole (46) communicating between the recess and the inner space of the housing. The valve opens and closes this hole.
Description
- 1. Field of the Invention
- The present invention relates to a swash-plate compressor to be used for an automobile air-conditioning system.
- 2. Description of the Related Art
- In a swash-plate compressor, one of compressors incorporated into an automobile air-conditioning system to perform a compressing operation, rotation of a shaft to be driven to rotate when subjected to rotational power of a vehicle engine is converted into reciprocation of a plurality of pistons disposed around the shaft in parallel thereto.
- In the swash-plate compressor, to perform this conversion of motions, a circular swash plate is attached to the shaft so as to diagonally intersect the shaft, and each piston is provided with a recess for receiving a part of the swash plate, each piston and the swash plate being brought into contact through bearing members disposed in the recess of each piston.
- In the swash-plate compressor, when its operation is started, evaporating ingredients of lubricating oil stored on the bottom of its housing and a part of mixed gas of a refrigerant and the lubricating oil to be introduced into the swash-plate compressor through a passage provided on the top inside the housing respectively enter the recess of each piston to serve for lubrication between the swash plate and the bearing members.
- Actually, however, there were cases where supply of the lubricating oil to a portion between the swash plate and the bearing members was insufficient, causing seizure between the swash plate and the bearing members shortly after starting, and causing the swash-plate compressor to stop operating.
- In view of this, it has been proposed to add another supply route of the lubricating oil. This supply route includes a screw hole provided at the shaft and opening at its one end as well as a plurality of holes communicating with the screw hole and opening toward the thrust bearing (Japanese Patent Appln. Public Disclosure No. 6-101641).
- According to this, after the swash-plate compressor starts its operation, the evaporating ingredients of the lubricating oil on the bottom of the housing and the lubricating oil ingredients in the mixed gas flow into the screw hole opening at one end of the shaft to be led from the screw hole through the screw hole into the portion between the swash plate and the bearing portion to be supplied. Even by this, however, the lubricating oil is not sufficiently refilled, thereby sometimes causing seizure.
- An object of the present invention is to provide a structure for introducing a large quantity of lubricating oil into recesses of pistons which receive a part of the swash plate of a swash-plate compressor.
- This invention relates to a housing for a swash-plate compressor which comprises: a top portion defining a passage for a mixed gas of a refrigerant and lubricating oil to be introduced into the swash-plate compressor and a valve such as a solenoid valve attached to the top portion. The top portion has at least one barrier with which the mixed gas can collide, a recess for reserving the lubricating oil in the mixed gas adhering to the barrier by collision with the barrier and flowing down along the barrier, and a hole communicating with the recess and the inner space of the housing. The valve performs opening and closing of the hole.
- The swash-plate compressor comprises the housing, a cylinder block housed in the inner space of the housing and provided with a plurality of cylinders at intervals from each other about the axis of the cylinder block and openings each communicating with one of the cylinders, a shaft rotatably supported on the cylinder block, a swash plate secured to the shaft and rotatable with the shaft, and a piston disposed inside each cylinder of the cylinder block and having a cavity to receive a part of the swash plate.
- According to the present invention, by absorption of the mixed gas from the exterior of the housing toward its interior, the mixed gas is introduced into a passage of a top portion of the housing and floats in the passage. At this time, a part of the mixed gas collides with a barrier in the passage, causing its lubricating oil ingredient to adhere to the barrier. The lubricating oil adhered to the barrier flows down into a recess of the passage along the barrier. Consequently, during operation of the swash-plate compressor, the lubricating oil ingredients are reserved inside the recess.
- By operating the valve to open a hole communicating with the recess, the lubricating oil reserved in the recess can be made to run down through the hole communicating with the recess. The lubricating oil running down from the hole goes down on a cylinder block which occupies the inner space of the housing, flows into one or plural cylinders through an opening in the peripheral wall face of the cylinder block, goes down the peripheral face of a piston inside the cylinder, and reaches the inside of a cavity of the piston. If one of the openings of the cylinder block is disposed to confront the hole of the housing top, the lubricating oil running down reaches the inside of the cylinder directly through the opening.
- Consequently, by opening the valve, for example, prior to activation of the swash-plate compressor, a large quantity of oil previously stored in the housing top can be supplied to a contact portion of the swash plate and the bearing member, thereby preventing generation of seizing in the contact portion of the swash-plate compressor to be subsequently activated.
- When a solenoid valve is used as the valve, it is possible to electrically control opening and closing of the hole to fit to the starting time of the swash-plate compressor.
- FIG. 1 is a partial vertical section of the swash-plate compressor according to the present invention.
- FIG. 2 is a cross section obtained along the line2-2 of FIG. 1.
- FIG. 3 is a cross section obtained along the line3-3 of FIG. 1.
- Referring to FIGS. 1 and 2, a swash-plate compressor to be loaded on an automobile is generally shown by a
reference numeral 10. - The swash-
plate compressor 10 comprises ahousing 12, acylinder block 14 housed in the inner space of thehousing 12, ashaft 16 rotatably supported on thecylinder block 14, aswash plate 18 secured to theshaft 16, and a plurality ofpistons 22 respectively disposed within a plurality (five in the illustrated embodiment) ofcylinders 20 provided in thecylinder block 14 to extend in its axial direction. - The swash-
plate compressor 10 is driven when subjected to rotational power of an on-vehicle engine (not shown). The rotational power is transmitted to theshaft 16 through a belt (not shown) to rotate the shaft. For transmission of the rotational power to theshaft 16 as well as its cancellation, a clutch apparatus (not shown) is attached to the front end portion of theshaft 16. - The rotation of the
shaft 16 is converted into linear motion to reciprocate thepiston 22 within eachcylinder 20 in its axial direction. As a result, the mixed gas of the refrigerant and the lubricating oil is sucked into thecylinder 20 from its both ends by turns (see the chain line showing an outline of the moving route), the mixed gas is compressed inside thecylinder 20 and then exhausted to the outside from both ends of thecylinder 20 by turns (see the dotted line showing an outline of the moving route). In this process, the swash-plate compressor 10 performs compressing work in an automobile air-conditioning system. - The
housing 12 comprises abody 24 which defines a housing space of thecylinder block 14 and having a generally cylindrical inner face, atop portion 26 following an upper portion of thebody 24 to project upward therefrom, atubular portion 28 with a reduced diameter following one end portion in the axial direction of thebody 24 and projecting from the one end portion to surround the front end portion of theshaft 16, and acap 30 secured to and covering an open end portion (the other end portion) of thebody 24. - The
housing 24 has in its upper and lower portions two cavities communicating with the housing space of the cylinder block 14 (however, only theupper cavity 31 is shown). Both cavities are substantially in the intermediate part of both end portions of thebody 24 and positioned right above and right below thecylinder block 14. - The
upper cavity 31 of the housing body receives the mixed gas to be introduced through apassage 32 mentioned later of thehousing top 26 and serves to distribute it toward both ends of eachcylinder 20. On the other hand, the cavity in the bottom portion acts as an oil pan which can store the lubricating oil. - The
housing top 26 defines thepassage 32 for the mixed gas to be introduced into the swash-plate compressor. Thepassage 32 begins with anopening 34 provided at the top portion 26 (in more detail, acover 40 to be described later) and opening in the exterior of thehousing 12 and ends with anotheropening 36 provided in thehousing body 24 and opening into theupper cavity 31. Consequently, the mixed gas is introduced from theopening 34 into thepassage 32 and can move from the other opening 36 through thepassage 32 into thehousing body 24. - In the illustrated embodiment, the
top portion 26 has a generally rectangular plane shape (see FIG. 3) and includesside walls 38 extending upward from thehousing body 24 and having a rectangular cross sectional shape, and acover 40 which covers the open top face of the side walls and closes and which is secured to theside walls 38 so as to be integral with theside walls 38. Consequently, thehousing body 24 also defined a part of thetop portion 26. Thetop portion 26 may have another plane shape, for example, such as a polygonal and a circular shapes in place of the illustrated rectangular shape. - Inside the
passage 32 there are provided at least one (four in the drawings)barrier 42, arecess 44 and ahole 46. - The four
barriers 42 are arranged at intervals from each other between bothends passage 32. Eachbarrier 42 extends vertically upward from thehousing body 24 toward thecover 40 and ends immediately before reaching thecover 40. Therefore, the mixed gas to be introduced into thepassage 32 during operating of the swash-plate compressor 10 collides with eachbarrier 42 while passing through thepassage 32 and flows through a clearance between eachbarrier 42 and thecover 40. When the mixed gas collides with thebarrier 42, a part of the lubricating oil which is an ingredient of the mixed gas adheres to thebarrier 42. Then, the lubricating oil adhered to thebarrier 42 flows down thebarrier 42 along its wall face into therecess 44 to be stored in therecess 44. - The
recess 44 is defined by a part of theside walls 38 of the top portion and theoutermost barrier 42 close to the opening 36 in thehousing body 24. Therecess 44 can be formed, in place of this embodiment, by setting the thickness of a part of thehousing body 24 larger and forming a sunken place therein. - Also, in the illustrated embodiment, the
outermost barrier 42 extends from one side of confronting both wall faces of theside walls 38 of the top portion to the other side. On the other hand, the other threebarriers 42 extend alternately from one of both the wall faces of theside walls 38 to portions immediately before the other, with clearances between thesebarriers 42 and the other side wall. Therefore, the lubricating oil stored in therecess 44 can move through the clearances to the portion between thebarriers 42, thereby keeping constant the height of the level of the lubricating oil stored in the recess. - It is possible to make each
barrier 42, in place of the illustrated embodiment, extend from thecover 40 in the opposite direction toward thehousing body 24. Also, eachbarrier 42 may be made to extend not vertically but diagonally or with a curve. - The lubricating oil stored in the
recess 44 can be exhausted out of therecess 44 through thehole 46. Thehole 46 is formed in thehousing body 24 and communicates with therecess 44 and the inner space of thehousing body 24. Consequently, the lubricating oil in therecess 44 can be made to go down onto thecylinder block 14 within thehousing body 24. - The
hole 46 is opened and closed by operating a valve, preferably asolenoid valve 45. Thesolenoid valve 45 is secured to thecover 40. Thesolenoid valve 45 has avalve body 47 which can go up and down within thepassage 32, and thevalve body 47 opens or closes thehole 46 by its up-and-down action. - The
valve body 47 can be made to go up and down by electrically controlling thesolenoid valve 45. Thesolenoid valve 45 is preferably controlled to open thehole 46 by elevating thevalve body 47 for several seconds before starting (activating) the swash-plate compressor 10 which had stopped for a long time. Instead of this, it is also possible to operate thesolenoid valve 45 every time theswash plate compressor 10 is activated while an automobile is driven. - The
hole 46 may be provided in an arbitrary position in the axial direction of thehousing body 24 but is preferably provided in the central position in the axial direction of thehousing body 24, as shown in the drawings. By this, thehole 46 can be made to be close or to oppose to anopening 62 to be described later which is provided in thecylinder block 14 and communicates with thecylinder 20. - According to this, the lubricating oil going down onto the
cylinder block 14 runs down along the periphery of thecylinder block 14 and reaches theopening 62, or enters directly into theopening 62 as described later. Thereafter, the lubricating oil enters thecylinder 20, runs down along the periphery of the cylinder, and reaches a connecting portion (aboss 64 to be described later) between theshaft 16 and theswash plate 18 within thecavity 70 to be described later of thepiston 22. - A plurality of
cylinders 20 provided in thecylinder block 14 are arranged at intervals from each other about the axis of thecylinder block 14. Eachcylinder 20 opens at both ends of thecylinder block 14, and both ends of thecylinder 20, i.e., both ends of thecylinder block 14 are respectively brought into contact with acap 30 of the housing and one end portion of thehousing body 24 through a pair ofvalve plates - The
housing cap 30 and the one end portion of thehousing body 24 respectively have two concentric annular spaces (onlyannular spaces cap 30 are shown) confronting bothvalve plates - Of both annular spaces, the inner
annular space 52 communicates with theupper cavity 31 of the housing body and can receive the mixed gas. On the other hand, the outerannular space 54 can receive the mixed gas discharged out of thecylinder 20. For reference, the letters L and H respectively meaning low pressure and high pressure are put in theannular spaces - In both
valve plates holes annular spaces cylinder 20. In each hole, a check valve (not shown) to control flowing of the mixed gas is disposed. Further, both annular spaces on the high pressure side (H) of thehousing body 24 communicate with each other through a tube (not shown) inserted into a hole penetrating thecylinder block 14 in its axial direction. - The mixed gas discharged into the annular space on the high pressure side is exhausted outside the
housing 12 from anoutlet 60 provided in thecap 30 of the housing and communicating with theannular space 54 on the cap side. - The
cylinder block 14 is provided with anelongated opening 62 communicating with eachcylinder 20. Eachopening 62 is placed substantially in the central portion of eachcylinder 20 in its axial direction. In the illustrated embodiment, onecylinder 20 is placed uppermost with itsopening 62 confronting thehole 46 for the lubricating oil. Therefore, the lubricating oil flowing down from thehole 46 drops directly into theopening 62. - The
swash plate 18 for converting the rotation of theshaft 16 into the reciprocation of eachpiston 22 includes aboss portion 64 surrounding theshaft 16 and secured thereto, and adisk portion 66 extending from the boss portion. Thereference numeral 68 shows a pair of thrust bearings disposed in contact with both ends of theboss portion 64 to surround theshaft 16. - The
disk portion 66 of the swash plate is inclined to theshaft 16. That is, thedisk portion 66 forms a crossed axes angle other than 90° relative to theshaft 16. Therefore, when theswash plate 18 rotates together with theshaft 16, an arbitrary portion relative to the circumferential direction of thedisk portion 66 in contact with eachpiston 22 changes with respect to the axial direction of theshaft 16. As a result, eachpiston 22 receives axial force from thedisk portion 66. - Each
piston 22 disposed within eachcylinder 20 of the cylinder block has acavity 70 for receiving thedisk portion 66 of theswash plate 18. - In each
cavity 70, there are disposed a disk-like shoe 72 which is a bearing member in contact with each face of thedisk portion 66, and aball 74 rotatably held on theshoe 72 and the wall face which defines thecavity 70. Thedisk portion 66 is brought into contact with each piston 22 (in more detail, with the wall face of the cavity 70). - Consequently, when the
swash plate 18 rotates, eachpiston 22 in contact with thedisk portion 66 is forced to displace, thereby to reciprocate. - Prior to starting of the swash-
plate compressor 10, a large quantity of the lubricating oil which flows down onto theopening 62 of the cylinder from thetop portion 26 of the housing and arrives onto theboss 64 within thecavity 70 of thepiston 22 inside the cylinder moves along thedisk portion 66 in its radial direction when the swash-plate compressor 10 starts, and reaches the portion between thedisk portion 66 and theshoe 72 to lubricate them. As a result, a shortage of the lubricating oil caused during stoppage of operation of the swash-plate compressor 10 and seizure accompanying thereto between thedisk portion 66 and theshoe 72 are solved.
Claims (5)
1. A housing for a swash-plate compressor, comprising:
a top portion defining a passage for a mixed gas of a refrigerant and lubricating oil to be introduced into said swash-plate compressor; and
a valve attached to said top portion;
wherein said top portion has at least one barrier which is provided within said passage and with which said mixed gas can collide; a recess for reserving said lubricating oil within said mixed gas adhered to said barrier by the collision and flowing down along said barrier; and a hole communicating with said recess and an inner space of said housing, and
wherein said valve performs opening and closing of said hole.
2. A housing according to claim 1 wherein said valve is formed from a solenoid valve.
3. A compressor comprising:
a housing described in claim 1;
a cylinder block accommodated in the inner space of said housing, said cylinder block including a plurality of cylinders at intervals from each other about its axis and an opening communicating with each cylinder;
a shaft supported rotatably on said cylinder block;
a swash plate secured to said shaft and rotatable with said shaft; and
a piston disposed within each cylinder of said cylinder block and having a cavity for receiving a part of said swash plate.
4. A housing according to claim 3 wherein said valve is formed from a solenoid valve.
5. A compressor according to claim 3 wherein one of the openings of said cylinder block and the hole on said top portion of said housing confront each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-388872 | 2001-12-21 | ||
JP2001388872A JP4050899B2 (en) | 2001-12-21 | 2001-12-21 | Swash plate compressor and its housing |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030118457A1 true US20030118457A1 (en) | 2003-06-26 |
Family
ID=19188215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/071,690 Abandoned US20030118457A1 (en) | 2001-12-21 | 2002-02-08 | Swash-plate compressor and its housing |
Country Status (3)
Country | Link |
---|---|
US (1) | US20030118457A1 (en) |
JP (1) | JP4050899B2 (en) |
DE (1) | DE10206572B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150000513A1 (en) * | 2012-12-27 | 2015-01-01 | Kawasaki Jukogyo Kabushiki Kaisha | Axial piston motor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006070745A (en) * | 2004-08-31 | 2006-03-16 | Valeo Thermal Systems Japan Corp | Compressor |
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US4918944A (en) * | 1987-10-23 | 1990-04-24 | Hitachi, Ltd. | Falling film evaporator |
US5062773A (en) * | 1989-03-02 | 1991-11-05 | Kabushiki Kaisha Toyoda Jidoshokku Seisakusho | Swash plate type refrigerant compressor with a separator of refrigerant gas and lubricant oil |
US5761914A (en) * | 1997-02-18 | 1998-06-09 | American Standard Inc. | Oil return from evaporator to compressor in a refrigeration system |
US5807076A (en) * | 1995-04-07 | 1998-09-15 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Lubrication method and lubrication controlling apparatus for clutchless compressor |
US5823294A (en) * | 1996-06-06 | 1998-10-20 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Lubrication mechanism in compressor |
US6010314A (en) * | 1997-01-10 | 2000-01-04 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Swash-plate compressor having a capacity control valve on the oil return passageway adjacent an oil separator |
US6296457B1 (en) * | 1999-04-15 | 2001-10-02 | Kabushiki Kaisha Toyoda Jidoshokki | Discharge pulsation damping apparatus for compressor |
US20020081214A1 (en) * | 2000-12-26 | 2002-06-27 | Yong Huang | Lubrication passage and nozzle for swash plate type compressor |
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IT1060943B (en) * | 1975-03-13 | 1982-09-30 | Central Automotive Ind | REFRIGERANT GAS COMPRESSOR WITH LUBRICATION SYSTEM FOR AIR CONDITIONERS OF VEHICLES AND OTHER |
US4392788A (en) * | 1980-08-15 | 1983-07-12 | Diesel Kiki Co., Ltd. | Swash-plate type compressor having oil separating function |
JPH06101641A (en) * | 1992-09-17 | 1994-04-12 | Yunikura:Kk | Swash plate compressor |
JP2000080982A (en) * | 1998-07-09 | 2000-03-21 | Toyota Autom Loom Works Ltd | Compressor |
-
2001
- 2001-12-21 JP JP2001388872A patent/JP4050899B2/en not_active Expired - Fee Related
-
2002
- 2002-02-08 US US10/071,690 patent/US20030118457A1/en not_active Abandoned
- 2002-02-16 DE DE10206572A patent/DE10206572B4/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4918944A (en) * | 1987-10-23 | 1990-04-24 | Hitachi, Ltd. | Falling film evaporator |
US5062773A (en) * | 1989-03-02 | 1991-11-05 | Kabushiki Kaisha Toyoda Jidoshokku Seisakusho | Swash plate type refrigerant compressor with a separator of refrigerant gas and lubricant oil |
US5807076A (en) * | 1995-04-07 | 1998-09-15 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Lubrication method and lubrication controlling apparatus for clutchless compressor |
US5823294A (en) * | 1996-06-06 | 1998-10-20 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Lubrication mechanism in compressor |
US6010314A (en) * | 1997-01-10 | 2000-01-04 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Swash-plate compressor having a capacity control valve on the oil return passageway adjacent an oil separator |
US5761914A (en) * | 1997-02-18 | 1998-06-09 | American Standard Inc. | Oil return from evaporator to compressor in a refrigeration system |
US6296457B1 (en) * | 1999-04-15 | 2001-10-02 | Kabushiki Kaisha Toyoda Jidoshokki | Discharge pulsation damping apparatus for compressor |
US20020081214A1 (en) * | 2000-12-26 | 2002-06-27 | Yong Huang | Lubrication passage and nozzle for swash plate type compressor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150000513A1 (en) * | 2012-12-27 | 2015-01-01 | Kawasaki Jukogyo Kabushiki Kaisha | Axial piston motor |
Also Published As
Publication number | Publication date |
---|---|
DE10206572B4 (en) | 2005-07-28 |
DE10206572A1 (en) | 2003-07-17 |
JP2003184742A (en) | 2003-07-03 |
JP4050899B2 (en) | 2008-02-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KABUSHIKI KAISHA UNICLA J, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KATO, SHIGEKI;REEL/FRAME:012577/0392 Effective date: 20020119 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |