KR20200044475A - Swash plate type compressor - Google Patents

Abstract

The present invention relates to a swash plate-type compressor which comprises: a casing having a bore; a rotary shaft rotatably supported by the casing; a rotor fastened with the rotary shaft to be rotated with the rotary shaft; a swash plate rotated with the rotary shaft and the rotor, wherein an inclination angle towards the rotary shaft is adjustable; and a piston linked with the swash plate to make a reciprocating motion in the bore and form a compression chamber with the bore. The rotor includes a rotor-side stopper which prevents the inclination angle of the swash plate from becoming greater than a predetermined angle. The swash plate includes a swash plate-side stopper which can come in contact with the rotor-side stopper, and can be formed to prevent noise caused by collision between the rotor-side stopper and the swash plate-side stopper. Accordingly, the present invention is able to reduce the off-noise generated when the rotor-side stopper and the swash plate-side stopper collide when the operation is stopped.

Description

Swash plate type compressor {SWASH PLATE TYPE COMPRESSOR}

The present invention relates to a swash plate type compressor, and more particularly, to a swash plate type compressor capable of adjusting the inclination angle of the swash plate to adjust the refrigerant discharge amount.

In general, a compressor that serves to compress refrigerant in a vehicle cooling system has been developed in various forms, and in such a compressor, a configuration for compressing the refrigerant performs reciprocating and rotational compression to perform compression while reciprocating and rotational compression. There is a rotating type.

In addition, the reciprocating type includes a crank type that transmits the driving force of a driving source to a plurality of pistons using a crank, a swash plate type that transmits to a rotating shaft provided with a swash plate, and a wobble plate type that uses a wobble plate. There are vane rotary type using vane, scroll type using orbiting scroll and fixed scroll.

Here, the swash plate type compressor reciprocates the piston with a swash plate that rotates with a rotating shaft to compress the refrigerant, and the stroke of the piston is adjusted by adjusting the inclination angle of the swash plate and a fixed-capacity type in which the swash plate of the swash plate is fixed. There is a variable-capacitance type that can control the refrigerant discharge amount by adjusting. Recently, it is mainly formed as a variable-capacitance type to improve the performance and efficiency of the compressor.

1 is a cross-sectional view showing a conventional swash plate type compressor formed of a variable displacement type, and FIG. 2 is a sectional view showing a state in which the inclination angle of the swash plate is restricted by the rotor in the swash plate type compressor of FIG. 1.

1 and 2, the conventional swash plate type compressor includes a bore 114, a casing 100 having a, a rotating shaft 210 rotatably supported by the casing 100, and the rotating shaft 210 ) Is rotated with the rotating shaft 210 and the rotor 430, the rotor 430 is rotated together with the rotating shaft 210 and the rotor 430 and the inclination angle with respect to the rotating shaft 210 It includes an adjustable swash plate 220 and a piston 230 interlocked with the swash plate 220 to reciprocate inside the bore 114 and form a compression chamber with the bore 114.

The rotor 430 is a rotor side hinge portion protruding toward the swash plate 220 from one side of the rotor side disc portion 432 and the rotor side disc portion 432 that extend along the outer circumference of the rotation shaft 210. 434 and a rotor-side stopper 436 protruding from the other side of the rotor-side disc portion 432 toward the swash plate 220 side.

The swash plate 220, a swash plate side disc portion 222 extending along the outer circumference of the rotation shaft 210, a swash plate side hinge arm protruding from the side of the swash plate side disc portion 222 toward the rotor 430 And a swash plate side stopper 226 protruding from the other side of the swash plate side disc portion 222 to the rotor 430 side.

Here, the front end of the rotor side hinge arm 434 and the front end of the swash plate side hinge arm 224 are formed to overlap each other in the rotational direction of the rotation shaft 210 and are connected to each other by a hinge pin 440.

That is, a rotor-side hinge hole 434a is formed at a distal end portion of the rotor-side hinge arm 434 to penetrate the distal end portion of the rotor-side hinge arm 434, and the swash plate is disposed at a distal end portion of the swash plate-side hinge arm 224. A swash plate side hinge hole 224a penetrating the distal end of the side hinge arm 224 is formed, and the hinge pin 440 is inserted into the rotor side hinge hole 434a and the swash plate side hinge hole 224a.

At this time, the hinge pin 440 is formed in a cylindrical shape, the swash plate side hinge hole 224a is formed in a cylindrical shape such that the hinge pin 440 is rotatable inside the swash plate side hinge hole 224a, The rotor-side hinge hole 434a is formed to extend in one direction so that the hinge pin 440 is movable along the rotor-side hinge hole 434a.

The rotor-side stopper 436 and the swash plate-side stopper 226 are to prevent the inclination angle of the swash plate 220 from becoming larger than a predetermined angle, and contact and space each other according to the inclination angle of the swash plate 220 Is formed. That is, the rotor side stopper 436 and the swash plate side stopper 226 are in contact with each other when the inclination angle of the swash plate 220 is increased, and are formed to be spaced apart from each other when the inclination angle of the swash plate 220 is decreased. Here, the inclination angle of the swash plate 220 is measured as an angle between the rotation axis 210 and the normal of the swash plate 220 based on the rotation center of the swash plate 220.

Conventional swash plate type compressor according to this configuration, when power is transmitted from the driving source (for example, the engine of the vehicle) to the rotating shaft 210, the rotating shaft 210, the rotor 430 and the swash plate 220 Rotating together, the piston 230 converts the rotational motion of the swash plate 220 into a linear motion and reciprocates inside the bore 114 to compress and discharge refrigerant, and the inclination angle of the swash plate 220 By adjusting the stroke of the piston 230 is adjusted, the refrigerant discharge amount is adjusted.

However, in such a conventional swash plate type compressor, there is a problem that so-called off noise is generated. That is, when the operation is stopped under a specific condition (for example, high pressure and high temperature conditions), high pressure gas remains inside the compression chamber, and the piston 230 moves to the bottom dead center side, and the swash plate side stopper 226 ) Hit the rotor-side stopper 436, causing a noise.

Republic of Korea Patent Publication No. 10-2015-0104992

Accordingly, an object of the present invention is to provide a swash plate type compressor capable of reducing off noise generated when a rotor side stopper collides with a swash plate side stopper during operation stoppage.

The present invention, in order to achieve the above object, a casing having a bore; A rotating shaft rotatably supported by the casing; A rotor coupled to the rotating shaft and rotated together with the rotating shaft; A swash plate that is rotated together with the rotating shaft and the rotor and inclined with respect to the rotating shaft; The piston is interlocked with the swash plate to reciprocate inside the bore and form a compression chamber with the bore. The rotor includes a rotor side stopper that prevents the inclination angle of the swash plate from becoming larger than a predetermined angle. And, the swash plate includes a swash plate side stopper contactable to the rotor side stopper, and provides a swash plate type compressor that is formed to prevent noise due to collision between the lot side stopper and the swash plate side stopper.

A fluid damper may be provided between the rotor side stopper and the swash plate side stopper.

A pocket may be formed on any one of the rotor side stopper and the swash plate side stopper, and a protrusion that is accessible to the pocket may be formed on the other of the rotor side stopper and the swash plate side stopper.

The projection may include a neck portion extending from the other of the rotor side stopper and the swash plate side stopper; And a head portion formed on a front end portion of the neck portion.

When the protrusion is inserted into the pocket, a refrigerant may be compressed between the head and the pocket.

When the protrusion is inserted into the pocket, the refrigerant between the head and the pocket may be formed to be compressed below a predetermined level.

The outer diameter of the head portion is formed smaller than the inner diameter of the pocket portion, and a gap may be formed between the head portion and the pocket.

When the protrusion is inserted into the pocket, a larger amount of refrigerant is compressed between the head and the pocket than the amount of refrigerant passing through the gap. On the radial direction of the pocket, the cross-sectional area of the head may be formed larger than the cross-sectional area of the gap.

The neck may be formed so as not to be eroded by the periphery of the pocket.

The outer diameter of the neck may be formed smaller than the outer diameter of the head.

The pocket is formed in a cylindrical shape, the neck portion is formed in a cylindrical shape, and the head portion may be formed in a spherical shape.

The length of the protrusion may be formed equal to or greater than the depth of the pocket.

A buffer member may be formed on any one of the front end surface of the head portion and the bottom surface of the pocket.

The protrusion may be formed as a separate body, and may be formed to be engaged with another one of the rotor side stopper and the swash plate side stopper.

The swash plate compressor according to the present invention includes a casing having a bore; A rotating shaft rotatably supported by the casing; A rotor coupled to the rotating shaft and rotated together with the rotating shaft; A swash plate that is rotated together with the rotating shaft and the rotor and inclined with respect to the rotating shaft; The piston is interlocked with the swash plate to reciprocate inside the bore and form a compression chamber with the bore. The rotor includes a rotor side stopper that prevents the inclination angle of the swash plate from becoming larger than a predetermined angle. And, by preventing the noise caused by the collision between the rotor side stopper and the swash plate side stopper, it is possible to reduce the off noise generated by the collision between the rotor side stopper and the swash plate side stopper when the operation is stopped.

1 is a cross-sectional view showing a conventional swash plate type compressor,
Figure 2 is a cross-sectional view showing a state in which the inclination angle of the swash plate is limited by the rotor in the swash plate type compressor of Figure 1,
Figure 3 is a cross-sectional view showing the rotor and the swash plate in a swash plate type compressor according to an embodiment of the present invention,
Figure 4 is a cross-sectional view showing a state in which the projection is inserted into the pocket in the swash plate type compressor of Figure 3,
5 is a cross-sectional view showing a state in which the projection of FIG. 4 is further inserted into the pocket and the inclination angle of the swash plate is restricted by the rotor.

Hereinafter, a swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view showing a rotor and a swash plate in a swash plate type compressor according to an embodiment of the present invention, Figure 4 is a sectional view showing a state in which the projection is inserted into the pocket in the swash plate type compressor of Figure 3, Figure 5 4 is a cross-sectional view showing a state in which the projection is further inserted into the pocket and the inclination angle of the swash plate is restricted by the rotor.

Meanwhile, components not shown in FIGS. 3 to 5 are referred to in FIG. 1 for convenience of description.

3 to 5 and 1, the swash plate type compressor according to an embodiment of the present invention includes a casing 100 and a compression mechanism provided inside the casing 100 to compress refrigerant. can do.

The casing 100 includes a cylinder block 110 in which the compression mechanism is accommodated, a front housing 120 coupled to the front side of the cylinder block 110 and a rear coupled to the rear side of the cylinder block 110. Housing 130 may be included.

On the center side of the cylinder block 110, a shaft hole 112 into which a rotation shaft 210 to be described later is inserted is formed, and a piston 230 to be described later is inserted into the outer circumferential side of the cylinder block 110, and the piston 230 With the bore 114 forming a compression chamber may be formed.

The shaft hole 112 may be formed in a cylindrical shape penetrating the cylinder block 110 along the axial direction of the cylinder block 110.

The bore 114 has a cylindrical shape passing through the cylinder block 110 along the axial direction of the cylinder block 110 at a portion spaced apart from the shaft hole 112 in the radially outward direction of the cylinder block 110. Can be formed.

And, the bore 114 is formed of n pieces so that the number of compression chambers is n, and the n bores 114 are arranged along the circumferential direction of the cylinder block 110 around the contraction hole 112. You can.

The front housing 120 may be fastened to the cylinder block 110 on the opposite side of the rear housing 130 based on the cylinder block 110.

Here, the cylinder block 110 and the front housing 120 are fastened to each other to form a crankcase S4 between the cylinder block 110 and the front housing 120.

The swash plate 220 to be described later and the rotor 430 to be described later may be accommodated in the crankcase S4.

The rear housing 130 may be fastened to the cylinder block 110 on the opposite side of the front housing 120 based on the cylinder block 110.

In addition, the rear housing 130 may be formed with a suction chamber S1 in which refrigerant to be introduced into the compression chamber is accommodated, and a discharge chamber S3 in which refrigerant discharged from the compression chamber is accommodated.

The suction chamber S1 may be in communication with a refrigerant suction pipe (not shown) that guides the refrigerant to be compressed into the casing 100.

The discharge chamber S3 may be in communication with a refrigerant discharge pipe (not shown) that guides the compressed refrigerant to the outside of the casing 100.

The compression mechanism may be formed to suck refrigerant from the suction chamber (S1) into the compression chamber, compress the sucked refrigerant in the compression chamber, and discharge the compressed refrigerant from the compression chamber to the discharge chamber (S3). have.

Specifically, the compressor mechanism is rotatably supported by the casing 100 and rotated by receiving rotational force from a driving source (eg, an engine of a vehicle) (not shown) (210), and the rotating shaft 210. It may be linked to the swash plate 220 is rotated in the interior of the crankcase (S4), and the piston 230 is reciprocated in the interior of the bore 114 is connected to the swash plate 220.

The rotating shaft 210 may be formed in a cylindrical shape extending in one direction.

And, the rotating shaft 210 is rotatably supported by one end being inserted into the cylinder block 110 (more precisely, the shaft hole 112), the other end penetrates the front housing 120, and the casing ( 100) and may be connected to the driving source (not shown).

The swash plate 220 is formed in a disk shape, and may be inclined to the rotating shaft 210 in the crankcase S4. Here, the swash plate 220 is fastened to the rotating shaft 210 so that the inclination angle of the swash plate 220 is variable, which will be described later.

The piston 230 is provided with n corresponding to the bore 114, and each piston 230 may be formed to reciprocate in each bore 114 in connection with the swash plate 220.

Specifically, the piston 230, one end inserted into the bore 114 and extending from the one end to the opposite side of the bore 114 and connected to the swash plate 220 in the crankcase S4 It may include the other end.

In addition, the swash plate type compressor according to the present embodiment may further include a valve mechanism 300 for communicating and shielding the suction chamber S1 and the discharge chamber S3 with the compression chamber.

Then, the swash plate type compressor according to the present embodiment, the differential pressure between the pressure of the crankcase (S4) and the pressure of the suction chamber (S1) (more precisely, the pressure of the crankcase (S4)) to adjust the rotating shaft 210 ) It may further include a tilt adjustment mechanism for adjusting the inclination angle of the swash plate (220).

The inclination adjusting mechanism, the pressure mechanism for adjusting the pressure difference (more precisely, the pressure of the crankcase (S4)) between the pressure of the crankcase (S4) and the pressure of the suction chamber (S1) and the swash plate (220) It may include a link mechanism for connecting the swash plate 220 and the rotating shaft 210 so that the inclination angle is variable.

The pressure mechanism includes a first flow path (not shown) communicating the discharge chamber S3 with the crank chamber S4 and a second flow path 420 communicating the crank chamber S4 with the suction chamber S1. ).

In addition, a pressure control valve (not shown) for adjusting the opening amount of the first flow passage (not shown) is formed in the first flow passage (not shown), and the suction passage S1 is provided in the second flow passage 420. An orifice hole 422 may be formed to depressurize the fluid passing through the second flow path 420 to prevent the pressure of the gas from rising.

The link mechanism may include a rotor 430 fastened to the rotation shaft 210 and rotated together with the rotation shaft 210 and a hinge pin 440 connecting the swash plate 220 and the rotor 430. have.

The rotor 430 is a rotor side hinge arm protruding toward the swash plate 220 from one side of the rotor side disc portion 432 and the rotor side disc portion 432 extending along the outer circumference of the rotating shaft 210. (434).

The swash plate 220 is a swash plate side hinge arm protruding toward the rotor 430 from one side of the swash plate side disc portion 222 and the swash plate side disc portion 222 extending along the outer circumference of the rotation shaft 210. (224).

Here, the front end portion of the rotor side hinge arm 434 and the front end portion of the swash plate side hinge arm 224 are formed to overlap each other in the rotational direction of the rotation shaft 210 and may be connected to each other by the hinge pin 440. .

That is, a rotor-side hinge hole 434a is formed at a distal end portion of the rotor-side hinge arm 434 to penetrate the distal end portion of the rotor-side hinge arm 434, and the swash plate is disposed at a distal end portion of the swash plate-side hinge arm 224. A swash plate side hinge hole 224a passing through the front end of the side hinge arm 224 is formed, and the hinge pin 440 can be inserted into the rotor side hinge hole 434a and the swash plate side hinge hole 224a. have.

At this time, the hinge pin 440 is formed in a cylindrical shape, the swash plate side hinge hole 224a is formed in a cylindrical shape such that the hinge pin 440 is rotatable inside the swash plate side hinge hole 224a, The rotor-side hinge hole 434a may be formed to extend in one direction such that the hinge pin 440 is slidable along the rotor-side hinge hole 434a.

On the other hand, in the link mechanism, the rotor 430 protrudes from the other side of the disc side portion 432 of the rotor toward the swash plate 220 to prevent the inclination angle of the swash plate 220 from becoming larger than a predetermined angle. It further includes a rotor-side stopper 436, the swash plate 220 is swash plate protruding from the other side of the swash plate-side disc portion 222 toward the rotor 430 side and contact and spaced apart from the rotor-side stopper 436 A side stopper 226 may be further included.

Here, in the case of the present embodiment, between the rotor side stopper 436 and the swash plate side stopper 226 so as to reduce the off noise generated when the rotor side stopper 436 and the swash plate side stopper 226 collide when the operation is stopped. The fluid damper (D) may be provided.

Specifically, a pocket D1 through which the refrigerant of the crankcase S4 can enter and exit may be formed on the swash plate side stopper 226.

The pocket D1 may be formed along the movement trajectory of the pocket D1 so that the projection D2, which will be described later, can smoothly enter and exit the pocket D1 when the inclination angle of the swash plate 220 is adjusted. That is, the pocket D1 may be formed to be engraved in the normal direction of the swash plate 220 from a surface of the outer surface of the swash plate side stopper 226 that is in contact with the rotor side stopper 436.

In addition, the pocket D1, the inner peripheral surface of the pocket D1 is formed in a cylindrical shape to correspond to the head D22 of the projection D2, which will be described later, and the base surface of the pocket D1 is formed in a hemispherical shape. You can.

A protrusion D2 that can enter and exit the pocket D1 may be formed on the rotor side stopper 436.

The protrusion D2 may be formed along the movement trajectory of the pocket D1 to smoothly enter and exit the pocket D1 when the inclination angle of the swash plate 220 is adjusted. That is, the protrusion D2 protrudes from the outer surface of the rotor-side stopper 436 that comes into contact with the swash plate-side stopper 226, and inclines in a direction away from the rotation shaft 210 toward the swash plate 220 side. Can be formed.

In addition, the protrusion D2 is a neck extending from the rotor side stopper 436 so that the protrusion D2 is not eroded by the peripheral portion of the pocket D1 (swash plate side stopper 226). portion (D21) and a head portion (D22) (head portion) formed on the tip of the neck portion (D21), the outer diameter of the neck portion (D21) may be formed smaller than the outer diameter of the head portion (D22) have.

Here, to effectively prevent the erosion of the projection (D2), the neck portion (D21) is formed in a cylindrical shape, the head portion (D22) may be preferably formed in a spherical shape.

And, the projection (D2), the head portion (D22) so that the smooth access to the pocket (D1), and when the projection (D2) is inserted into the pocket (D1) the interior of the pocket (D1) The refrigerant existing therein is compressed between the head portion D22 and the pocket D1 and acts as a damper, but is compressed too much so that the damper function is not lost, so that the outer diameter of the head portion D22 is the pocket D1. It may be formed smaller than the outer diameter of the negative. That is, between the head portion D22 and the inner peripheral surface of the pocket D1, so that some of the refrigerant compressed between the head portion D22 and the pocket D1 can escape to the outside of the pocket D1. A fine gap may be formed in the.

Here, when the amount of refrigerant passing out of the pocket (D1) through the fine gap is greater than the amount of refrigerant between the head (D22) and the pocket (D1) between the head (D22) and the pocket (D1) In the refrigerant compression may not occur. In consideration of this, in the present embodiment, when the protrusion D2 is inserted into the pocket D1, the amount of refrigerant compressed between the head portion D22 and the pocket D1 rather than the amount of refrigerant passing through the fine gap. It can be formed a lot. That is, in the radial direction of the pocket D1, the maximum cross-sectional area of the head portion D22 may be formed larger than the minimum cross-sectional area of the gap.

Here, as the head portion D22 is formed in a spherical shape as described above, the flow resistance of the refrigerant flowing through the head portion D22 may be reduced. Thereby, the projection D2 can enter and exit the pocket D1 relatively smoothly.

Hereinafter, the operational effects of the swash plate type compressor according to the present embodiment will be described.

That is, when power is transmitted from the driving source (not shown) to the rotating shaft 210, the rotating shaft 210 and the swash plate 220 may be rotated together.

In addition, the piston 230 may be reciprocated within the bore 114 by converting the rotational motion of the swash plate 220 into a linear motion.

And, when the piston 230 moves from the top dead center to the bottom dead center, the compression chamber communicates with the suction chamber S1 by the valve mechanism 300 and is shielded from the discharge chamber S3, The refrigerant in the suction chamber S1 may be sucked into the compression chamber.

And, when the piston 230 moves from the bottom dead center to the top dead center, the compression chamber is shielded from the suction chamber S1 and the discharge chamber S3 by the valve mechanism 300, and the refrigerant in the compression chamber Can be compressed.

And, when the piston 230 reaches the top dead center, the compression chamber is shielded from the suction chamber (S1) by the valve mechanism 300 and communicates with the discharge chamber (S3), in the compression chamber The compressed refrigerant may be discharged to the discharge chamber (S3).

Here, in the swash plate type compressor according to the present embodiment, the refrigerant discharge amount may be adjusted as follows.

First, when stopped, the refrigerant discharge amount may be set to the minimum mode. That is, the swash plate 220 is disposed close to the vertical to the rotation shaft 210, the inclination angle of the swash plate 220 may be close to zero (0). Here, the inclination angle of the swash plate 220 may be measured as an angle between the rotation axis 210 of the swash plate 220 and the normal of the swash plate 220 based on the rotation center of the swash plate 220.

Next, when the operation is started, once the refrigerant discharge amount can be adjusted to the maximum mode is the maximum. That is, the first flow path (not shown) is closed by the pressure regulating valve (not shown), and the refrigerant in the crank chamber S4 flows through the second flow path 420 to the suction chamber S1. Therefore, the pressure of the crankcase S4 may be reduced to the suction pressure level. That is, the differential pressure between the pressure of the crankcase S4 and the pressure of the suction chamber S1 can be reduced to a minimum. Accordingly, the pressure of the crankcase S4 applied to the piston 230 is reduced to a minimum, the stroke of the piston 230 is increased to the maximum, and the inclination angle of the swash plate 220 is increased to the maximum. , The refrigerant discharge amount can be increased to the maximum.

Next, after the maximum mode, the opening amount of the first flow path (not shown) is adjusted by the pressure regulating valve (not shown), and the pressure of the crankcase S4 is adjusted according to the required refrigerant discharge amount. You can. That is, a differential pressure between the pressure of the crankcase S4 and the pressure of the suction chamber S1 may be adjusted. Accordingly, the pressure of the crankcase S4 applied to the piston 230 is adjusted, the stroke of the piston 230 is adjusted, the inclination angle of the swash plate 220 is adjusted, and the refrigerant discharge amount is adjusted. You can.

That is, for example, when the refrigerant discharge amount is required to be decreased after the refrigerant discharge amount is increased to the maximum, the first flow path (not shown) is opened by the pressure regulating valve (not shown), and the first flow path (not shown) ) Opening amount is increased by the pressure regulating valve (not shown), so that the pressure of the crankcase S4 may be increased. That is, a differential pressure between the pressure of the crankcase S4 and the pressure of the suction chamber S1 may be increased. Here, the refrigerant in the crankcase (S4) is discharged to the suction chamber (S1) through the second flow path (420), but the suction chamber (through the second flow path (420) in the crankcase (S4) ( The amount of refrigerant flowing into the suction chamber (S1) through the first flow path (not shown) from the discharge chamber (S3) is greater than the amount of refrigerant discharged to S1), thereby increasing the pressure of the crankcase (S4). Accordingly, the pressure of the crankcase S4 applied to the piston 230 is increased, the stroke of the piston 230 is reduced, the inclination angle of the swash plate 220 is reduced, and the refrigerant discharge amount is reduced. You can.

As another example, when the refrigerant discharge amount is increased after the refrigerant discharge amount is decreased, the first flow path (not shown) is opened by the pressure regulating valve (not shown), and the opening amount of the first flow path (not shown) is Reduced by a pressure control valve (not shown), the pressure of the crankcase (S4) can be reduced. That is, a differential pressure between the pressure of the crankcase S4 and the pressure of the suction chamber S1 may be reduced. Here, the refrigerant in the discharge chamber (S3) is introduced into the suction chamber (S1) through the first flow path (not shown), but the suction through the first flow path (not shown) in the discharge chamber (S3) The amount of refrigerant discharged from the crankcase (S4) to the suction chamber (S1) through the second flow path (420) is greater than the amount of refrigerant flowing into the chamber (S1), thereby reducing the pressure of the crankcase (S4). Accordingly, the pressure of the crankcase S4 applied to the piston 230 is reduced, the stroke of the piston 230 is increased, the inclination angle of the swash plate 220 is increased, and the refrigerant discharge amount is increased. You can.

In this process, the inclination angle of the swash plate 220 is prevented from becoming larger than a predetermined angle by the rotor side stopper 436 and the swash plate side stopper 226, in the case of this embodiment, the rotor side stopper 436 ) Is provided between the swash plate side stopper 226 and the off noise generated by collision of the rotor side stopper 436 and the swash plate side stopper 226 when the operation is stopped can be reduced. That is, when the operation is stopped under a specific condition (for example, high pressure and high temperature conditions), high pressure gas remains inside the compression chamber, and the piston 230 is moved toward the bottom dead center, so that the swash plate side stopper 226 ) Is in contact with the rotor side stopper 436, but before the swash plate side stopper 226 strikes the rotor side stopper 436, the projection D2 is inserted into the pocket D1, and the pocket ( The refrigerant existing inside D1) is compressed between the pocket D1 and the projection D2 and may generate a buffering action.

Meanwhile, in the present embodiment, the protrusion D2 is integrally formed with the rotor side stopper 436. However, when the protrusion D2 having a relatively elongated shape is integrally formed with the rotor side stopper 436, the protrusion D2 may be bent or damaged in the process of manufacturing the rotor 430. have. In consideration of this, it may be preferable that the protrusion D2 is formed separately from the rotor side stopper 436 and then fastened to the rotor side stopper 436.

Meanwhile, in the present embodiment, the pocket D1 is formed on the swash plate side stopper 226 and the protrusion D2 is formed on the rotor side stopper 436, but is not limited thereto. That is, a pocket D1 is formed on the rotor side stopper 436 and a projection D2 may be formed on the swash plate side stopper 226.

On the other hand, in the present embodiment, in order to prevent collision between the lot-side stopper 436 and the swash plate-side stopper 226, the protruding length of the protrusion D2 is formed to be greater than or equal to the depth of the pocket D1. . Here, the front end surface of the head portion D22 and the bottom surface of the pocket D1 may be in contact with each other to generate another noise. In consideration of this, it may be preferable that a buffer member (not shown) is provided on any one of the front end surface of the head D22 and the bottom surface of the pocket D1.

100: casing 114: bore
210: rotating shaft 220: swash plate
226: swash plate side stopper 230: piston
430: rotor 436: rotor side stopper
D1: pocket D2: projection
D21: Neck D22: Head

Claims (15)

Casing 100 with bore 114;
A rotating shaft 210 rotatably supported by the casing 100;
A rotor 430 coupled to the rotating shaft 210 and rotated together with the rotating shaft 210;
A swash plate 220 rotated together with the rotating shaft 210 and the rotor 430 and inclined with respect to the rotating shaft 210 is adjustable;
It includes; a piston 230 interlocked with the swash plate 220 to reciprocate within the bore 114 to form a compression chamber with the bore 114;
The rotor 430 includes a rotor side stopper 436 that prevents the inclination angle of the swash plate 220 from becoming larger than a predetermined angle,
The swash plate 220 includes a swash plate side stopper 226 contactable with the rotor side stopper 436,
A swash plate type compressor that is formed to prevent noise due to collision between the rotor side stopper (436) and the swash plate side stopper (226). According to claim 1,
A swash plate compressor having a fluid damper (D) between the rotor side stopper (436) and the swash plate side stopper (226). According to claim 2,
A pocket D1 is formed in any one of the rotor side stopper 436 and the swash plate side stopper 226,
A swash plate type compressor in which the protrusion D2 accessible to the pocket D1 is formed on the other of the rotor side stopper 436 and the swash plate side stopper 226. According to claim 3,
The projection (D2),
A neck portion D21 extending from the other of the rotor side stopper 436 and the swash plate side stopper 226; And
A swash plate type compressor comprising a; head portion (D22) (head portion) formed on the tip of the neck portion (D21). According to claim 4,
When the projection (D2) is inserted into the pocket (D1), a swash plate compressor, characterized in that the refrigerant is compressed between the head (D22) and the pocket (D1). The method of claim 5,
When the projection (D2) is inserted into the pocket (D1), the swash plate compressor is formed so that the refrigerant between the head (D22) and the pocket (D1) is compressed to a predetermined level or less. The method of claim 6,
The outer diameter of the head portion (D22) is smaller than the inner diameter of the pocket portion (D1), a swash plate compressor in which a gap is formed between the head portion (D22) and the pocket (D1). The method of claim 7,
When the protrusion (D2) is inserted into the pocket (D1), the swash plate type compressor is formed with a larger amount of refrigerant compressed between the head (D22) and the pocket (D1) than the amount of refrigerant passing through the gap. The method of claim 8,
On the radial direction of the pocket (D1), the cross-sectional area of the head portion (D22) is a swash plate compressor is formed larger than the cross-sectional area of the gap. The method of claim 7,
The neck portion (D21) is a swash plate type compressor that is formed not to be eroded by the peripheral portion of the pocket (D1). The method of claim 10,
The swash plate type compressor having an outer diameter of the neck portion D21 smaller than the outer diameter of the head portion D22. According to claim 4,
The pocket (D1) is formed in a cylindrical shape,
The neck portion (D21) is formed in a cylindrical shape,
The head portion (D22) is a swash plate type compressor formed in a spherical shape. According to claim 4,
The length of the projection (D2) is a swash plate type compressor is formed to be greater than or equal to the depth of the pocket (D1). The method of claim 13,
A swash plate type compressor in which a shock absorbing member is formed on any one of the front end surface of the head (D22) and the bottom surface of the pocket (D1). According to claim 3,
The protrusion (D2) is formed in a separate body, the swash plate type compressor, characterized in that fastened to the other of the rotor side stopper (436) and the swash plate side stopper (226).

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