WO2012086921A1

WO2012086921A1 - Swash plate-type compressor

Info

Publication number: WO2012086921A1
Application number: PCT/KR2011/008229
Authority: WO
Inventors: 이건호; 김기범; 이태진; 김성용
Original assignee: 두원공과대학교; 주식회사 두원전자
Priority date: 2010-12-24
Filing date: 2011-10-31
Publication date: 2012-06-28
Also published as: KR20120072818A

Abstract

The present invention relates to a swash plate-type compressor that has improved connection structures between a driving shaft and a swash plate and between the swash plate and a piston, so as to reciprocate the piston back and forth without rotating the swash plate about the driving shaft. The swash plate-type compressor includes: a housing (100); a cylinder block (200) having a plurality of cylinder bores (201); a plurality of pistons (300) that reciprocate within the cylinder bores (201), respectively; a driving shaft (400) rotatably installed on the cylinder block (200); and a swash plate (500) installed on the piston (300) to interact with the piston (300). The swash plate-type compressor comprises an inclination angle varying means (600) that is disposed between the driving shaft (400) and the swash plate (500) to support the swash plate (500), and that is configured such that when the driving shaft (400) rotates, the swash plate (500) does not rotate but moves back and forth with an inclination angle retained. Accordingly, a shoe for connecting the swash plate and the piston to each other can be removed, thus fundamentally preventing mechanical loss such as the wear and degradation of a compressor due to friction generated on a contact surface between a shoe and a swash plate.

Description

Swash plate compressor

The present invention relates to a swash plate type compressor, and in particular, a swash plate type compressor capable of reciprocating a piston forward and backward without rotating the swash plate relative to the drive shaft by improving the connection structure between the drive shaft and the swash plate and the swash plate. It is about.

In general, a vehicle air conditioner is a device that maintains a temperature inside a car lower than an external temperature by using a refrigerant, and includes a compressor, a condenser, and an evaporator to configure a circulation cycle of the refrigerant.

The compressor is a device that compresses and pumps refrigerant, and is driven by engine power or a motor.

On the other hand, the swash plate type compressor is divided into a swash plate type compressor which is installed in a fixed state or a capacity variable swash plate type variable inclined angle corresponding to the rotation of the drive shaft in the drive shaft receiving the power of the engine, and also A shoe is interposed around the swash plate, and the piston performs a linear reciprocating motion to suck, compress and discharge the refrigerant gas.

Hereinafter, a swash plate compressor according to the prior art will be described with reference to FIG. 1A.

As shown in the drawing, the swash plate compressor according to the related art has a front housing 10 having a front cylinder block 20 disposed therein, and a rear housing having a rear cylinder block 20a integrated with the front housing 10. It consists of (10a).

The front and

rear cylinder blocks

20 and 20a are provided with a plurality of bores 21 therein, and the cylinder bores 21 corresponding to each other of the front and

rear cylinder blocks

20 and 20a are provided. The piston 50 is coupled to the linear reciprocating motion as well as the piston 50 is connected by a shoe 45 coupled to the outer circumference of the swash plate 40 obliquely coupled to the drive shaft 30.

Accordingly, the piston 50 reciprocates inside the bore 21 of the front and

rear cylinder blocks

20 and 20a in conjunction with the swash plate 40 rotating together with the drive shaft 30.

However, in the swash plate type compressor according to the related art, since the rotational force of the swash plate 40 reciprocates the piston 50 through the shoe 45, a considerable amount of frictional force is generated on the contact surface between the shoe 45 and the swash plate 40. As a result, the mechanical loss due to the performance and wear of the compressor greatly reduces the durability, thereby greatly shortening the life of the component.

Recently, as shown in FIG. 1B, a method 41 for smoothly polishing the surface of the swash plate 40 or applying a lubricating coating agent is additionally performed as a solution to the above problems.

However, the process of polishing or coating the swash plate 40 is very complicated, and thus, the productivity of the compressor is lowered and the cost of the machining process is consumed, thereby increasing the manufacturing cost.

Moreover, the machining process for the surface of the swash plate 40 is roughened again in proportion to the operating time of the compressor and the coating agent is peeled off, thereby reducing the mechanical loss caused by the contact surface between the shoe 45 and the swash plate 40. There was a difficulty that could not be fundamentally blocked.

The present invention has been made to solve the above problems, an object of the present invention is to improve the connection structure of the drive shaft and the swash plate and the swash plate and the piston to reciprocate the piston forward and backward without rotating the swash plate It is to provide a swash plate compressor that can be made.

In addition, another object of the present invention is to provide a swash plate compressor which essentially blocks the mechanical loss caused by the contact surface of the shoe and the swash plate by omitting the components of the shoe connecting the swash plate and the piston.

In order to achieve the above object, the swash plate compressor according to the present invention,

A cylinder block having a housing, a plurality of cylinder bores, a piston accommodated reciprocally in each cylinder bore, a drive shaft rotatably installed with respect to the cylinder block, and interlocked with the piston. In a swash plate compressor including a swash plate,

Interposed between the drive shaft and the swash plate to support the swash plate, and when the drive shaft is rotated, the inclination angle variable means for moving the front and rear in the state in which the swash plate does not rotate and maintains the inclination angle is provided do.

In particular, the inclination angle variable means is fixed to the outer peripheral surface of the drive shaft, consisting of a rotating body having an inclined cylindrical surface for maintaining the inclination angle of the swash plate and a first bearing interposed between the inclined cylindrical surface of the rotating body and the swash plate It is characterized by.

In addition, the inclination angle variable means is fixed to the outer peripheral surface of the drive shaft, the inclined cylindrical surface for maintaining the inclination angle of the swash plate and the rotating body formed with a flange on one end of the inclined cylindrical surface, between the flange and the swash plate of the rotating body And a second bearing interposed therebetween, and a first bearing interposed between the inclined cylindrical surface of the rotating body and the swash plate.

In addition, the second bearing is characterized in that the needle bearing.

And, the surface of the swash plate is characterized in that the receiving groove for receiving the first bearing inwardly formed.

In particular, the receiving groove of the swash plate is characterized in that the snap ring for preventing the separation of the first bearing is additionally installed.

In addition, the snap ring is characterized in that disposed on the opposite side of the second bearing relative to the first bearing.

On the other hand, it is characterized in that the shoe is interposed between the swash plate and the piston.

And, the edge end of the swash plate is formed in an arc shape, the coupling groove of the piston is characterized in that it is formed in an arc shape.

According to the present invention having the above-described configuration, by providing the inclination angle variable means between the drive shaft and the swash plate, it is possible to omit the components of the shoe connecting the swash plate and the piston to the friction generated in the contact surface between the shoe and the swash plate There is an effect that can fundamentally block the mechanical loss, such as performance and wear of the compressor.

In addition, the swash plate has an effect that can be omitted, such as a grinding process or a lubricating coating process that was separately carried out to reduce the frictional heat generated during the friction with the shoe.

Figure 1a is a cross-sectional view showing a swash plate compressor according to the prior art.

Figure 1b is a cross-sectional view showing the process of smoothly polishing the surface of the swash plate according to the prior art or a lubricant coating applied.

2 is a cross-sectional view showing a swash plate compressor according to an embodiment of the present invention.

3 is a perspective view showing the main components of the swash plate compressor according to an embodiment of the present invention.

4 is an exploded perspective view of FIG. 3.

5 is a cross-sectional view showing an operating state of FIG.

6 is a cross-sectional view showing a connection structure between the swash plate and the piston.

Hereinafter, with reference to the accompanying Figures 2 to 6 will be described in detail a preferred embodiment of the present invention.

Prior to the description, in the swash plate compressor according to the present invention, the swash plate 500 does not rotate by the drive shaft 400, and the components of the shoe 45 connecting the piston 300 and the swash plate 500 are omitted. Note that the piston 300 for compressing the refrigerant can be reciprocated.

However, the swash plate 500 has a margin to move slightly in the rotational direction of the drive shaft 400.

As shown in FIG. 2, the swash plate compressor according to the present invention includes a housing 100, a cylinder block 200 having a plurality of cylinder bores 201, and a reciprocating motion in each cylinder bore 201. It includes a piston 300 that is possibly accommodated, a drive shaft 400 rotatably installed with respect to the cylinder block 200, and a swash plate 500 that is interlocked with the piston 300.

Since the configuration is the same as or similar to the components applied to the prior art or the conventional swash plate compressors of FIGS. 1A and 1B described above, descriptions of overlapping configurations will be omitted and only different configurations will be described.

First, as shown in FIG. 6, the swash plate 500 has a structure in which a circumferential surface thereof is directly connected to the coupling groove 301 of the piston 300. At this time, since the swash plate 500 is indirectly supported by the first bearing 630 coupled to the drive shaft 400, even if the drive shaft 400 rotates, the swash plate 500 does not rotate at all and is not rotated. However, in the process of changing the inclination angle of the swash plate 500 by the inclination angle variable means to be described later it is to reciprocate the piston 300 in the front, rear direction.

In this case, the edge end of the swash plate 500 is formed in an arc shape, the coupling groove 301 of the piston 300 is formed in a substantially arcuate structure to connect the swash plate 500 and the piston 300. Preferably, but not necessarily limited to, the swash plate 500 and the piston 300 may be a link or hinged connection.

That is, as shown in FIG. 1A, the components of the shoe 45 for reciprocating the piston 50 in the process of rotating the drive shaft 30 and the swash plate 40 together as in the conventional swash plate compression are omitted. Thereby, there is an effect that can fundamentally block the mechanical loss, such as the performance and wear of the compressor due to friction generated in the contact surface of the shoe 45 and the swash plate 40.

In addition, the swash plate 40 has an advantage that it can omit the work such as the polishing process or the lubricant coating process that was separately carried out to reduce the frictional heat generated in the friction process with the shoe 45.

Hereinafter, the inclination angle variable means 600 which is a characteristic component of the present invention will be described in detail.

3 to 6, the inclination angle variable means 600 is interposed between the drive shaft 400 and the swash plate 500 to support the swash plate 500, while the drive shaft 400 rotates. When the swash plate 400 is to be moved in the front, rear direction in the state of maintaining the inclination angle without rotating, the inclined cylindrical surface protruding from the outer peripheral surface of the drive shaft 400 and maintains the inclination angle of the swash plate 500 601, a rotating body 610 having a flange 602 formed at one end of the inclined cylindrical surface 601, and interposed between the flange 602 and the swash plate 500 of the rotating body 610. The second bearing 620, and the first bearing 630 is interposed between the inclined cylindrical surface 601 and the swash plate 500 of the rotating body 610.

The rotating body 610 is protruded from the outer peripheral surface of the drive shaft 400 and the flange formed on one end of the inclined cylindrical surface 601 and the inclined cylindrical surface 601 to maintain the inclination angle of the swash plate 500 ( 602).

In particular, the rotating body 610 is formed with a through hole 611 in the inner center to be detachably fitted with respect to the drive shaft (400).

The flange 602 serves to maintain the inclination angle more stably by supporting the outer surface with respect to the inclination angle of the swash plate 500.

The rotation main body 610 is inclined downward from one end toward the other end, and rotates together when the drive shaft 400 rotates. That is, the swash plate 500 does not rotate but instead repeatedly changes the swash plate to an inclination angle opposite to the inclination angle while the inclined cylindrical surface 601 of the rotating body 610 rotates.

Specifically, as shown in Figure 5 (a), the swash plate 500 is rotated by the drive shaft 400 in a state that always maintains a constant inclination angle by the inclined cylindrical surface 601 of the inclination angle variable means 600 In the process of rotating the inclined cylindrical surface 601 together in the rotational direction of the drive shaft 400, the inclination of the swash plate 500 is moved to the opposite side as shown in FIG. 5 (b). At this time, the piston 300 connected to the swash plate 500 is interlocked together to perform a reciprocating motion in the front and rear directions for compressing the refrigerant (see FIG. 6).

In addition, the second bearing 620 is interposed between the flange 602 and the swash plate 500 of the rotating body 610 may be used needle bearing, etc., the flange facing the outer surface of the swash plate 500 ( 602 serves to smoothly move relative to the swash plate 500.

The first bearing 630 is interposed between the inclined cylindrical surface 601 and the swash plate 500 of the rotating body 610, and the swash plate 500 indirectly supports the drive shaft 400 At the same time serves to prevent the rotational force of the drive shaft 400 is transmitted to the swash plate (500).

In addition, the receiving groove 510 is formed on the surface of the swash plate 500 to receive the first bearing inward.

In addition, it is preferable that a snap ring 640 is additionally installed in the receiving groove 510 of the swash plate 500 to prevent separation of the first bearing 630. In this case, the snap ring 640 may be disposed opposite to the second bearing 620 based on the first bearing 630.

Thus, according to the present invention, by installing the inclination angle variable means 600 between the drive shaft 400 and the swash plate 500, it is possible to omit the components of the shoe connecting the swash plate 500 and the piston 300 There is an effect that can fundamentally block the mechanical loss, such as the performance and wear of the compressor due to friction generated in the contact surface between the shoe and the swash plate (500).

In addition, the swash plate 500 has an effect that can be omitted, such as a grinding process or a lubricating coating process that has been carried out separately to reduce the frictional heat generated during the friction with the shoe.

On the other hand, as shown in Figure 7, the configuration is also possible that the shoe 45 is interposed between the swash plate 500 and the piston 300.

As described above, the swash plate compressor of the present invention has been applied to an embodiment of a double head compressor, but is applicable to a conventional single head compressor that is not necessarily limited to a double head compressor.

Claims

A cylinder block 200 having a housing 100, a plurality of cylinder bores 201, a piston 300 reciprocally received within each cylinder bore 201, and the cylinder block 200 In the swash plate-type compressor comprising a drive shaft 400 rotatably installed with respect to, and the swash plate 500 is installed to be interlocked with the piston 300,

Interposed between the drive shaft 400 and the swash plate 500 to support the swash plate 500, and when the drive shaft 400 rotates, the swash plate 500 does not rotate, before and after maintaining the inclination angle Swash plate compressor characterized in that the inclination angle variable means 600 to move in the direction.
The method of claim 1,

The inclination angle variable means 600,

A rotating body 610 fixedly installed on an outer circumferential surface of the drive shaft 400 and having an inclined cylindrical surface 601 for maintaining an inclination angle of the swash plate 500;

The swash plate-type compressor, characterized in that consisting of a first bearing (630) interposed between the inclined cylindrical surface (601) and the swash plate (500) of the rotating body (610).
The method of claim 1,

The inclination angle variable means 600,

Rotating body 610 is fixed to the outer peripheral surface of the drive shaft 400, the inclined cylindrical surface 601 for maintaining the inclination angle of the swash plate 500 and the flange 602 formed at one end of the inclined cylindrical surface 601 )Wow,

A second bearing 620 interposed between the flange 602 and the swash plate 500 of the rotating body 610;

The swash plate-type compressor, characterized in that consisting of a first bearing (630) interposed between the inclined cylindrical surface (601) and the swash plate (500) of the rotating body (610).
The method of claim 3,

The second bearing 620 is a swash plate compressor, characterized in that the needle bearing.
The method according to any one of claims 2 to 4,

The swash plate compressor, characterized in that the receiving groove (510) is formed on the surface of the swash plate (500) for receiving the first bearing (630) inward.
The method of claim 5,

The swash plate-type compressor, characterized in that the receiving groove 510 of the swash plate 500 is additionally provided with a snap ring (640) for preventing the separation of the first bearing (630).
The method of claim 6,

The snap ring 640 is a swash plate compressor, characterized in that disposed on the opposite side of the second bearing (620) with respect to the first bearing (630).
The method of claim 5,

Swash plate compressor, characterized in that the shoe is interposed between the swash plate (500) and the piston (300).
The method according to any one of claims 2 to 4,

The rim end of the swash plate 500 is formed in an arc shape, the coupling groove 301 of the piston 300 is a swash plate compressor, characterized in that formed in an arc shape.