Low-vibration variable-discharge compressor

Abstract

The utility model discloses a low-vibration variable-displacement compressor, which belongs to the technical field of compressors and comprises a shell, a front cover and a rear cover are respectively mounted at two ends of the shell, an air cylinder is mounted in the shell, a main shaft is rotatably connected between the air cylinder and the front cover, and a rotating body is mounted on the periphery of one end of the main shaft. The swash plate is slidably sleeved on the periphery of the main shaft, unstable vibration in the moving process of the swash plate can be reduced by the aid of the first buffer part and the second buffer part on two sides of the swash plate, the probability of resonance between the swash plate and other parts is reduced, the probability of resonance of the whole compressor body is further reduced, and the service life of the compressor body is prolonged. The reliability of the compressor is improved, the service life of the support is prolonged, meanwhile, the sealing assembly is arranged in the groove, invasion of external dust can be reduced, the damage probability of the main shaft is reduced, vibration improvement caused by damage of the driving shaft is restrained, and the vibration reduction effect of the compressor is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a low-vibration variable displacement compressor. Background Technology

[0002] Variable displacement compressors are a new type of compressor that can automatically adjust their displacement as needed. The advantage of variable displacement compressors lies in their ability to adjust displacement according to actual demand, avoiding the energy waste problem of traditional compressors under high pressure, thus improving compressor efficiency and performance. Compared with fixed displacement compressors, variable displacement compressors are not affected by engine speed and can automatically adjust power output according to cooling demand, thus having less impact on engine fuel consumption. They are widely used in automotive air conditioning systems, automatically adjusting cooling capacity according to the vehicle's interior temperature and load, providing more stable cooling effects and lower energy consumption. Existing variable displacement compressors use a swashplate assembly to drive the piston to compress the refrigerant. The swashplate needs to perform periodic reciprocating motion. During the swashplate's movement, it is disturbed by high-pressure gas, resulting in random fluctuations and potential rigid collisions with other components, inevitably producing periodic vibrations and noise.

[0003] Based on the above, the inventors discovered that existing vibration reduction solutions generally use springs or rubber damping sleeves to buffer the swashplate. However, existing buffers use the same specifications, while the reciprocating motion of the swashplate is subject to different forces. If the buffer's elasticity is too high, it may not be able to completely alleviate the swashplate's vibration; if the buffer's elasticity is too low, it may generate additional vibration, meaning that the vibration cannot be effectively reduced. Therefore, in view of this, the inventors researched and improved the existing structure to provide a low-vibration variable displacement compressor, aiming to achieve a more practical purpose. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a low-vibration variable displacement compressor, which aims to reduce the unstable vibration during the swashplate movement, thereby improving the reliability of the compressor and the service life of the support.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A low-vibration variable displacement compressor includes a housing with a front cover and a rear cover installed at both ends. A cylinder is installed inside the housing, and a main shaft is rotatably connected between the cylinder and the front cover. A rotating body is installed on the outer periphery of one end of the main shaft. A swashplate is slidably fitted on the outer periphery of the main shaft, and the swashplate is located between the cylinder and the rotating body. A buffer element one and a buffer element two are provided on the outer periphery of the main shaft. Buffer element one is located between the rotating body and the swashplate, and buffer element two is located between the swashplate and the cylinder. A pulley assembly is provided on the outer periphery of the end of the front cover away from the housing. A groove is provided at one end of the pulley assembly, and a sealing component is installed in the groove.

[0009] Furthermore, the preload of buffer component one and buffer component two are different.

[0010] Furthermore, the cylinder body is provided with a support part one and a support part two. The buffer part one is disposed between the swashplate and the rotating body. The buffer part one includes a rubber damping pad one and a spring one. The rubber damping pad one is installed at one end of the rotating body. The spring one is sleeved on the outer periphery of the main shaft, and its two ends are in contact with the rubber damping pad one and the swashplate respectively.

[0011] Furthermore, the second buffer is disposed between the swash plate and the first support part. The second buffer includes a second rubber damping pad and a second spring. The second rubber damping pad is installed at one end of the first support part, and the second spring is sleeved on the outer periphery of the spindle, with both ends in contact with the swash plate and the second rubber damping pad, respectively.

[0012] Furthermore, a positioning part is provided at one end of the main shaft near the cylinder body, and a thrust bearing is sleeved on the outer periphery of the positioning part. The thrust bearing is located between the main shaft and the second support part provided in the cylinder body.

[0013] Furthermore, the sealing assembly includes a sealing element and a fixing bolt. One side of the sealing element is provided with an annular sleeve, and one end of the main shaft near the front cover extends into the annular sleeve. The other side of the sealing element is provided with an annular groove, and a mounting hole penetrating the sealing element is provided at the center of the annular groove. The fixing bolt is disposed in the annular groove, and one end of the fixing bolt passes through the mounting hole and is threadedly connected to the main shaft.

[0014] 3. Beneficial effects

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] (1) This solution reduces the unstable vibration during the movement of the swashplate by setting buffer one and buffer two on both sides of the swashplate, thereby reducing the probability of the swashplate resonating with other components, and thus reducing the probability of the compressor body resonating as a whole, improving the reliability of the compressor and the life of the bracket.

[0017] (2) This solution, by setting a sealing component in the groove, can reduce the intrusion of external dust, reduce the probability of damage to the main shaft, suppress the vibration increase caused by damage to the drive shaft, and greatly improve the vibration reduction effect of the compressor.

[0018] (3) In this scheme, by setting the rubber damping pad, the elasticity of the rubber damping pad is less than the stiffness of the corresponding spring, so as to reduce the influence of the rubber damping pad on the stiffness and resonance of the spring, and the preload of the spring can be adjusted by adjusting the specifications of the rubber damping pad. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 2 For the present utility model Figure 1 Enlarged structural diagram of position A in the middle;

[0021] Figure 3 For the present utility model Figure 1 Enlarged structural diagram of position B in the middle;

[0022] Figure 4 For the present utility model Figure 1 A magnified structural diagram of position C in the middle.

[0023] Explanation of the labels in the diagram:

[0024] 1. Shell;

[0025] 2. Front cover;

[0026] 3. Back cover;

[0027] 4. Cylinder block; 401. Support part one; 402. Support part two;

[0028] 5. Spindle;

[0029] 6. Rotating body;

[0030] 7. Sloping plate;

[0031] 8. Buffer component 1; 801. Rubber vibration damping pad 1; 802. Spring 1;

[0032] 9. Buffer component two; 901. Rubber vibration damping pad two; 902. Spring two;

[0033] 10. Pulley assembly;

[0034] 11. Sealing assembly; 1101. Seal; 1102. Fixing bolt;

[0035] 12. Thrust bearing. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Example:

[0038] Please see Figure 1-4 A low-vibration variable displacement compressor includes a housing 1, with a front cover 2 and a rear cover 3 installed at both ends of the housing 1. A cylinder 4 is installed inside the housing 1. A main shaft 5 is rotatably connected between the cylinder 4 and the front cover 2. A rotating body 6 is installed on the outer periphery of one end of the main shaft 5. A swash plate 7 is slidably sleeved on the outer periphery of the main shaft 5, and the swash plate 7 is located between the cylinder 4 and the rotating body 6. A buffer element 1 8 and a buffer element 2 9 are provided on the outer periphery of the main shaft 5. The buffer element 1 8 is located between the rotating body 6 and the swash plate 7, and the buffer element 2 9 is located between the swash plate 7 and the cylinder 4. A pulley assembly 10 is provided on the outer periphery of the end of the front cover 2 away from the housing 1. A groove is provided on one end of the pulley assembly 10, and a sealing component 11 is installed in the groove.

[0039] In the above scheme, buffer components 8 and 9 are located on both sides of the swashplate 7, and the preload of buffer components 8 and 9 is different. This reduces unstable vibrations during the movement of the swashplate 7, lowers the probability of resonance between the swashplate 7 and other components, and also lowers the probability of resonance of the compressor body as a whole, thereby improving the reliability of the compressor and the life of the bracket. At the same time, a sealing component 11 is set in the groove.

[0040] In at least one embodiment, the preload of the buffer component in the direction of greater force is set to be larger, so as to reduce the compression distance of the buffer component of the swashplate 7, thereby reducing the vibration generated during the rebound of the buffer component. The preload of the buffer component in the direction of less force is set to be smaller, so as to prevent the swashplate 7 from directly colliding with the buffer component due to insufficient elasticity, thereby effectively reducing the vibration caused by the movement of the swashplate 7. The preload of the buffer component can be adjusted by adjusting the material of the buffer component, adding preload components, etc. to achieve the difference in preload.

[0041] See Figure 3 and Figure 4The cylinder body 4 is internally provided with a support part 401 and a support part 402. The buffer component 8 includes a rubber damping pad 801 and a spring 802. The rubber damping pad 801 is installed at one end of the rotating body 6, and the spring 802 is sleeved on the outer periphery of the main shaft 5, with both ends contacting the rubber damping pad 801 and the swashplate 7, respectively. The buffer component 9 includes a rubber damping pad 901 and a spring 902. The rubber damping pad 901 is installed at one end of the support part 401, and the spring 902 is sleeved on the outer periphery of the main shaft 5, with both ends contacting the swashplate 7 and the rubber damping pad 901, respectively. A positioning part is provided at one end of the main shaft 5 near the cylinder body 4, and a thrust bearing 12 is sleeved on the outer periphery of the positioning part. The thrust bearing 12 is located between the main shaft 5 and the support part 402 provided in the cylinder body 4. In use, the thrust bearing 12 can effectively prevent the main shaft 5 from moving axially, support and guide it, and reduce friction and wear, thereby reducing the vibration of the main shaft 5 and thus reducing the vibration of the compressor.

[0042] In the above scheme, the elasticity of rubber damping pad 801 is less than the stiffness of spring 802, and the elasticity of rubber damping pad 901 is less than the stiffness of spring 902, so as to reduce the influence of the stiffness of spring 802 and spring 902, and the influence of resonance between rubber damping pad 801 and spring 802, and between rubber damping pad 901 and spring 902. Furthermore, the preload of spring 802 and spring 902 can be adjusted by adjusting the specifications of rubber damping pad 801 and rubber damping pad 901, thereby improving the vibration damping effect of the compressor.

[0043] See Figure 2 The sealing assembly 11 includes a seal 1101 and a fixing bolt 1102. An annular sleeve is provided on one side of the seal 1101, and one end of the main shaft 5 near the front cover 2 extends into the annular sleeve. An annular groove is provided on the other side of the seal 1101, and a mounting hole penetrating the seal 1101 is provided at the center of the annular groove. The fixing bolt 1102 is provided in the annular groove, and one end of the fixing bolt 1102 passes through the mounting hole and is threadedly connected to the main shaft 5.

[0044] In the above solution, the cooperation between the seal 1101 and the fixing bolt 1102 greatly improves the overall sealing performance of the equipment, reduces the intrusion of external dust, thereby reducing the probability of damage to the main shaft 5, suppressing the vibration increase caused by damage to the main shaft 5, and greatly improving the vibration reduction effect of the compressor.

[0045] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A low-vibration variable displacement compressor, comprising a housing (1), wherein a front cover (2) and a rear cover (3) are respectively installed at both ends of the housing (1), characterized in that: A cylinder body (4) is installed inside the housing (1). A main shaft (5) is rotatably connected between the cylinder body (4) and the front cover (2). A rotating body (6) is installed on the outer periphery of one end of the main shaft (5). A swash plate (7) is slidably sleeved on the outer periphery of the main shaft (5), and the swash plate (7) is located between the cylinder body (4) and the rotating body (6). A buffer component one (8) and a buffer component two (9) are provided on the outer periphery of the main shaft (5). The buffer component one (8) is located between the rotating body (6) and the swash plate (7), and the buffer component two (9) is located between the swash plate (7) and the cylinder body (4). The front cover (2) is provided with a pulley assembly (10) on the outer periphery of the end away from the housing (1). A groove is provided at one end of the pulley assembly (10), and a sealing component (11) is installed in the groove.

2. The low-vibration variable displacement compressor according to claim 1, characterized in that: The preload of buffer component one (8) and buffer component two (9) are different.

3. The low-vibration variable displacement compressor according to claim 1, characterized in that: The cylinder body (4) is provided with a support part one (401) and a support part two (402). The buffer part one (8) is disposed between the swash plate (7) and the rotating body (6). The buffer part one (8) includes a rubber damping pad one (801) and a spring one (802). The rubber damping pad one (801) is installed at one end of the rotating body (6). The spring one (802) is sleeved on the outer periphery of the main shaft (5), and its two ends are in contact with the rubber damping pad one (801) and the swash plate (7) respectively.

4. The low-vibration variable displacement compressor according to claim 1, characterized in that: The second buffer (9) is disposed between the swash plate (7) and the first support part (401). The second buffer (9) includes a second rubber damping pad (901) and a second spring (902). The second rubber damping pad (901) is installed at one end of the first support part (401), and the second spring (902) is sleeved on the outer periphery of the main shaft (5), and both ends are in contact with the swash plate (7) and the second rubber damping pad (901) respectively.

5. The low-vibration variable displacement compressor according to claim 1, characterized in that: The main shaft (5) is provided with a positioning part at one end near the cylinder body (4), and a thrust bearing (12) is sleeved on the outer periphery of the positioning part. The thrust bearing (12) is located between the main shaft (5) and the second support part (402) provided in the cylinder body (4).

6. The low-vibration variable displacement compressor according to claim 1, characterized in that: The sealing assembly (11) includes a sealing element (1101) and a fixing bolt (1102). An annular sleeve is provided on one side of the sealing element (1101), and the end of the main shaft (5) near the front cover (2) extends into the annular sleeve. An annular groove is provided on the other side of the sealing element (1101), and a mounting hole penetrating the sealing element (1101) is provided at the center of the annular groove. The fixing bolt (1102) is provided in the annular groove, and one end of the fixing bolt (1102) penetrates the mounting hole and is threadedly connected to the main shaft (5).

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