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Variable displacement swash plate type compressor

Inactive Publication Date: 2015-06-18
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a type of compressor that uses a swash plate to compress gas. The compressor has a housing with a suction chamber, discharge chamber, swash plate chamber, and cylinder bore. A shaft is supported by the housing and a swash plate is rotated by the shaft. A link mechanism is connected between the shaft and swash plate, allowing the swash plate to change its angle with respect to the shaft. A piston moves in the cylinder bore and is controlled by a conversion mechanism that moves it at a stroke corresponding to the angle of the swash plate. An actuator changes the angle of the swash plate and a control mechanism controls the actuator. A swash plate chamber communicates with the suction chamber and an actuator is fixed in the swash plate chamber to move it. A pressure regulation chamber is formed and a shaft hole allows the swash plate chamber and the pressure regulation chamber to communicate with each other. The shaft hole has an annular member that adjusts the flow rate of refrigerant based on the pressure difference between the chambers. This compressor has improved performance and efficiency.

Problems solved by technology

However, in the above explained conventional compressor, there is a concern that lubrication between the drive shaft and the shaft hole is insufficient, seizure occurs here, and durability is deteriorated.

Method used

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  • Variable displacement swash plate type compressor
  • Variable displacement swash plate type compressor
  • Variable displacement swash plate type compressor

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0029]As shown in FIG. 1, the compressor in embodiment 1 includes a housing 1, a drive shaft 3, a swash plate 5, a link mechanism 7, a plurality of pistons 9, a pair of shoes 11a and 11b, an actuator 13, and a control mechanism 15 shown in FIG. 2.

[0030]As shown in FIG. 1, the housing 1 includes a front housing 17 located in the front of the compressor, a rear housing 19 located in the rear of the compressor, first and second cylinder blocks 21 and 23 located between the front housing 17 and the rear housing 19, and first and second valve forming plates 39 and 41.

[0031]In the front housing 17, a boss 17a projecting forward is formed. A shaft seal device 25 is provided in the boss 17a. In the front housing 17, a first suction chamber 27a and a first discharge chamber 29a are formed. The first suction chamber 27a is located on the inner circumferential side of the front housing 17. The first discharge chamber 29a is formed in an annular shape and is located on the outer circumferential...

embodiment 2

[0112]In a compressor in embodiment 2, a second supporting member 46 shown in FIG. 7 is pressed into the drive shaft main body 30 instead of the second supporting member 43b in the compressor in embodiment 1. Consequently, in the compressor, the drive shaft 3 is configured by the drive shaft main body 30, the first supporting member 43a, and the second supporting member 46.

[0113]In the compressor, a second sliding bearing 22c is provided in the second shaft hole 23b instead of the second sliding bearing 22b. The second sliding bearing 22c is also equivalent to the radial bearing in the present invention. Note that a roller bearing may be provided instead of the second sliding bearing 22c.

[0114]The second supporting member 46 is pressed into the rear end side of the drive shaft main body 30 and located in the second shaft hole 23b. The second supporting member 46 is also equivalent to the cap in the present invention. A flange 461 is formed at the front end of the second supporting ...

embodiment 3

[0119]In a compressor in embodiment 3, first and second annular members 65a and 65b shown in FIG. 8A are adopted instead of the first and second annular members 61a and 61b in the compressor in embodiment 1. The first and second annular members 65a and 65b are also made of PEEK. The first and second annular members 65a and 65b are also respectively accommodated in the first and second recessed strip portions 433 and 434 and located between the second supporting member 43b and the second shaft hole 23b.

[0120]The first and second annular members 65a and 65b have the same configuration and respectively include joint gap 67. The configuration is explained below with reference to the joint gap 67 of the first annular member 65a as an example.

[0121]As shown in FIGS. 8A and 8B, the joint gap 67 is formed by first to third cutouts 670a to 670c and a pair of communication grooves 670d and 670e. The first cutout 670a extends in the axial direction of the first annular member 65a. The second ...

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PUM

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Abstract

In the compressor of the present invention, first and second recessed strip portions are recessed in a second supporting member. First and second annular members are respectively provided in the first and second recessed strip portions. The first and second annular members respectively include joint gap formed by first to third cutouts. The third cutouts function as aperture in the first and second annular members. The first and second annular members respectively move in the first and second recessed strip portions according to a pressure difference between a pressure regulation chamber and a swash plate chamber. Consequently, the compressor adjusts a flow rate of a refrigerant circulating from the pressure regulation chamber to the swash plate chamber and adjusts a supply amount of lubricant supplied to a second sliding bearing and the like.

Description

TECHNICAL FIELD[0001]The present invention relates to a variable displacement swash plate type compressor.BACKGROUND ART[0002]Japanese Patent Laid-Open No. 8-105384 discloses a conventional variable displacement swash plate type compressor (hereinafter referred to as compressor). In the compressor, a housing is formed by a front housing, a cylinder block, and a rear housing. A suction chamber and a discharge chamber are respectively formed in the front housing and the rear housing. A pressure regulation chamber is formed in the rear housing.[0003]In the cylinder block, a swash plate chamber, a plurality of cylinder bores, and a center bore are formed. The center bore is formed on a rear side of the cylinder block.[0004]A drive shaft is inserted through the housing and is rotatably supported in the housing. A swash plate rotatable by the rotation of the drive shaft is provided in the swash plate chamber. A link mechanism that allows a change in an inclination angle of the swash plate...

Claims

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Application Information

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IPC IPC(8): F04B27/18
CPCF04B2027/1813F04B27/1804F04B27/109F04B27/12F04B27/14F04B39/00F16C17/02
Inventor YAMAMOTO, SHINYASUZUKI, TAKAHIROHONDA, KAZUNARINISHII, KEI
Owner TOYOTA IND CORP