Compressor capable of reducing noise and vibration

Abstract

The utility model discloses a compressor capable of reducing noise and vibration, and belongs to the technical field of compressors. A compressor capable of reducing noise and vibration comprises a master control part, a shell, a motor, a rotating shaft and a vortex part, wherein the motor, the rotating shaft and the vortex part are detachably installed in the shell. The general control part is detachably mounted at the tail end of the shell, electrically connected with the motor and used for controlling and driving the motor to rotate; the vortex part is used for compressing gas under the driving of the rotating shaft; the motor comprises a stator and a rotor, the stator is electrically connected with the master control part, and the rotor is rotationally connected with the stator; the outer wall of the rotating shaft is in interference or detachable connection with a rotor of the motor; the rotor can drive the rotating shaft to rotate along with the rotor; a spring is arranged at the tail end of the rotating shaft and used for providing pre-tightening force for the rotating shaft and a bearing piece bearing the rotating shaft, and axial or circumferential jumping of the rotating shaft is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and more specifically relates to a compressor with noise reduction and vibration reduction. Background Art

[0002] In today's industrial and daily life, compressors, as a driven fluid machine that boosts low-pressure gas to high-pressure gas, are widely used. Compressors can suck in low-temperature, low-pressure refrigerant gas from the intake pipe, compress it through the operation of the motor, and then discharge high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle. Compressors play a key role in refrigeration equipment such as air conditioners and refrigerators.

[0003] Common compressors include piston compressors, screw compressors and scroll compressors; piston compressors have a wide pressure range but are noisy; screw compressors have a large flow rate but high assembly precision; scroll compressors have a simple structure and smooth operation, and because meshing replaces wear, the service life of the device is increased. However, scroll compressors still produce large vibrations and noise during operation, which may cause internal components to loosen; taking a compressor with a vibration reduction and noise reduction structure disclosed in a Chinese invention patent document (CN202320153937.7) as an example, the invention reduces vibration transmission by setting vibration-damping rubber pads at the connections of compressor components; however, this method has limited effect on noise suppression, and the main shaft inside the compressor will experience axial runout, thereby generating noise, and the noise will be further amplified when transmitted to the equipment casing or the structure connected to it through vibration, affecting the working environment.

[0004] Therefore, we need a compressor with simple structure, stable operation and noise and vibration reduction. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a compressor with noise reduction and vibration reduction, which has a simple structure and improves the stability of torque transmission by increasing the preload force of the rotating shaft through a spring, thereby achieving the effect of noise reduction and vibration reduction.

[0006] The utility model discloses a noise-reducing and vibration-reducing compressor, comprising a main control unit, a shell, and a motor, a rotating shaft, and a vortex unit that are detachably mounted inside the shell; the main control unit is detachably mounted at the rear end of the shell and is electrically connected to the motor for controlling and driving the motor to rotate.

[0007] The shell includes a front shell, a rear shell and an end cover that are detachably connected in sequence; the vortex part is detachably mounted on the inner side of the front shell, and is used to compress the gas through the rotation of the movable scroll disk under the drive of the rotating shaft; the motor is detachably mounted on the inner side of the rear shell, and the motor includes a stator and a rotor, the stator is detachably mounted inside the rear shell, and is electrically connected to the main control part, and the rotor is rotationally connected to the stator; a high-pressure chamber is formed between the end cover and the front shell, and a low-pressure chamber is formed between the front shell and the rear shell; the rear shell is provided with an air inlet; an exhaust port is provided on the side of the end cover, and the low-pressure gas enters the low-pressure chamber from the air inlet, and is compressed by the vortex part to form high-pressure gas, which enters the high-pressure chamber and is discharged from the exhaust port.

[0008] A faceplate is provided on the side of the front shell close to the rear shell, the tail end of the rotating shaft contacts the tail end inside the rear shell, and the front end of the rotating shaft extends and passes through the inner side of the faceplate; the outer wall of the rotating shaft is interference fit or detachably connected to the rotor of the motor, and the rotor can drive the rotating shaft to rotate together; a spring is provided at the tail end of the rotating shaft for providing pre-tightening force to the rotating shaft and the bearing supporting it to prevent the rotating shaft from axial or circumferential runout.

[0009] As a further improvement of the present invention, a mounting groove is provided at the center of the tail end inside the rear shell, and a bearing 1 is detachably installed inside the mounting groove, the outer ring of the bearing 1 cooperates with the inner wall of the mounting groove, and the inner ring of the bearing 1 cooperates with the tail end of the rotating shaft; a bearing 2 is provided on the inner side of the faceplate, the outer wall of the side of the rotating shaft away from the tail end cooperates with the inner ring of the bearing 2, and the outer ring of the bearing 2 cooperates with the faceplate; the front and rear of the rotating shaft are supported by the bearing 2 and the bearing 1 respectively, and it rotates more stably with the rotor.

[0010] As a further improvement of the present invention, a step surface is provided near the tail end of the rotating shaft, and a spring is located between the step surface of the rotating shaft and a side surface of the bearing close to the rotating shaft, which is used to provide axial preload after the rotating shaft and the bearing are assembled, thereby achieving the purpose of reducing vibration and noise.

[0011] As a further improvement of the present invention, the faceplate is fixedly mounted on the side of the front shell close to the rear shell, and includes a bearing mounting portion, an eccentric block mounting portion and a number of support plates evenly distributed radially inward; the bearing mounting portion is used to assemble bearing 2, and the inner wall of the eccentric block mounting portion is rotatably connected to the eccentric block to ensure the stability of the rotation of the rotating shaft; one end of the support plate is fixedly connected to the inner wall of the front shell, and the other end is fixedly connected to the outer wall of the bearing mounting portion, which can improve the supporting strength of the faceplate and enable it to better resist vibration or impact under the working condition of high-speed rotation of the rotating shaft.

[0012] As a further improvement of the present invention, a sealing gasket 1 is provided at the connection between the front shell and the rear shell, and a sealing gasket 2 is provided at the connection between the end cover and the front shell, which are used to seal the interior of the compressor and reduce the transmission of sound or vibration to the outside world.

[0013] As a further improvement of the present invention, a mounting hole is opened inside the rotor, and the rotating shaft cooperates with the mounting hole; a number of axially distributed protrusions are provided inside the mounting hole, and the protrusions abut and connect the rotating shaft, which is used to improve the interference fit effect between the rotating shaft and the rotor, making the rotation of the rotating shaft more stable, and at the same time increasing the heat dissipation channel, so that heat can be dissipated along the strip-shaped protrusions, preventing overheating of components due to heat accumulation.

[0014] As a further improvement of the present invention, a pressure relief valve is provided on the end face of the end cover, which automatically opens when the pressure reaches a set safety value, discharging part or all of the high-pressure gas from the system, thereby preventing the compressor components from being damaged due to excessive pressure.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the compressor structure of the present invention is simple, and a spring is provided at the tail end of the shaft to provide pre-tightening force to the shaft and the bearing supporting it, thereby improving the rigidity of the shaft and improving the guiding accuracy of the shaft, thereby avoiding axial or circumferential runout of the shaft, and achieving the purpose of reducing vibration and reducing noise; a step surface is provided near the tail end of the shaft so that the spring is clamped between the step surface and the bearing, which is convenient for disassembly and assembly, and can achieve the pre-tightening effect after the shaft is assembled in the compressor; by connecting the front shell and the rear shell A sealing gasket is provided at the joint, and a sealing gasket is provided at the joint between the end cover and the front shell. This can not only achieve the effect of noise reduction by sealing the inner cavity of the compressor, but also reduce the impact of the vibration generated by the motor drive on the compressor accessories through the vibration reduction effect of the gasket, so that the compressor operation is more stable; by arranging a number of axially distributed protrusions in the mounting hole of the rotor to contact and connect with the rotating shaft, the interference fit effect between the rotating shaft and the rotor is improved, making the rotation of the rotating shaft more stable, and at the same time increasing the heat dissipation channel, so that heat can be dissipated along the strip protrusions, preventing overheating of components due to heat accumulation, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating shaft of the present invention;

[0019] Figure 4 This is an enlarged schematic diagram of the structure at point A of the present utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the rear shell of the present utility model;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the rotating shaft of the second embodiment of the present invention.

[0022] Description of the numbers in the figure:

[0023] 1 Main control unit, 2 housing, 21 front housing, 22 rear housing, 221 air inlet, 222 mounting groove, 23 end cover, 231 exhaust port, 232 pressure relief valve, 24 faceplate, 241 bearing mounting portion, 242 eccentric block mounting portion, 243 support plate, 25 sealing gasket 1, 26 sealing gasket 2, 3 motor, 31 stator, 32 rotor, 321 protrusion, 4 rotating shaft, 41 step surface, 5 vortex portion, 6 spring, 7 bearing 1, 8 bearing 2, 9 wave spring. DETAILED DESCRIPTION

[0024] Specific embodiment 1: Please refer to Figure 1-Figure 5 A compressor with noise reduction and vibration reduction includes a main control unit 1, a shell 2, and a motor 3, a rotating shaft 4 and a vortex unit 5 that are detachably mounted inside the shell 2; the main control unit 1 is detachably mounted at the rear end of the shell 2 by bolts and is electrically connected to the motor 3 for controlling and driving the motor 3 to rotate.

[0025] like Figure 2 The shell 2 includes a front shell 21, a rear shell 22 and an end cover 23 that are detachably connected in sequence by bolts; the vortex portion 5 is detachably mounted on the inner side of the front shell 21, and is used to drive the movable scroll disk to rotate relative to the fixed scroll disk under the drive of the rotating shaft 4 to achieve gas compression; the motor 3 is detachably mounted on the inner side of the rear shell 22, and the motor 3 includes a stator 31 and a rotor 32, the stator 31 is detachably mounted inside the rear shell 22, and is electrically connected to the main control unit 1, and the rotor 32 is rotationally connected to the stator 31; a high-pressure chamber is formed between the end cover 23 and the front shell 21, and a low-pressure chamber is formed between the front shell 21 and the rear shell 22; the rear shell 22 is provided with an air inlet 221; an exhaust port 231 is provided on the side of the end cover 23, and the low-pressure gas enters the low-pressure chamber from the air inlet 221, and is compressed by the vortex portion 5 to form high-pressure gas, which enters the high-pressure chamber and is discharged from the exhaust port 231.

[0026] A faceplate 24 is provided on one side of the front shell 21 close to the rear shell 22, and the tail end of the rotating shaft 4 contacts the tail end inside the rear shell 22, and the front end of the rotating shaft 4 extends and passes through the inner side of the faceplate 24; the outer wall of the rotating shaft 4 and the rotor 32 of the motor 3 are interference fit or detachably connected by a sleeve, and the rotor 32 can drive the rotating shaft 4 to rotate together; a spring 6 is provided at the tail end of the rotating shaft 4 for providing pre-tightening force to the rotating shaft 4 and the bearing supporting it, so as to avoid axial or circumferential runout of the rotating shaft 4, thereby reducing vibration and noise.

[0027] Specifically, a mounting groove 222 is provided at the center of the rear end inside the rear shell 22, and a bearing 7 is detachably installed inside the mounting groove 222 by fitting. The outer ring of the bearing 7 cooperates with the inner wall of the mounting groove 222, and the inner ring of the bearing 7 cooperates with the rear end of the rotating shaft 4; a bearing 2 8 is provided on the inner side of the disc 24, and the outer wall of the side of the rotating shaft 4 away from the rear end cooperates with the inner ring of the bearing 2 8, and the outer ring of the bearing 2 8 cooperates with the disc 24; the front and rear of the rotating shaft 4 are supported by the bearing 2 8 and the bearing 1 7 respectively, and the rotation with the rotor 32 is more stable, thereby reducing the vibration of the rotating shaft 4.

[0028] Specifically, such as Figure 3 The faceplate 24 shown is fixedly mounted on one side of the front shell 21 close to the rear shell 22, and includes a bearing mounting portion 241, an eccentric block mounting portion 242 and a plurality of support plates 243 evenly distributed radially inward; the bearing mounting portion 241 is used to assemble the bearing 2 8, and the inner wall of the eccentric block mounting portion 242 is rotatably connected to the eccentric block, and is used to balance the center of gravity offset caused by the operation of the vortex portion 5 driven by the rotating shaft 4, thereby ensuring the stable rotation of the rotating shaft 4; one end of the support plate 243 is fixedly connected to the inner wall of the front shell 21, and the other end is fixedly connected to the outer wall of the bearing mounting portion 241, which can improve the supporting strength of the faceplate 24, so that it can better resist vibration or impact under the working condition of high-speed rotation of the rotating shaft 4, thereby ensuring the stable movement of the compressor.

[0029] Specifically, a sealing gasket 25 is provided at the connection between the front shell 21 and the rear shell 22, and a sealing gasket 26 is provided at the connection between the end cover 23 and the front shell 21, which are used to seal the interior of the compressor and reduce the transmission of sound to the outside world. The vibration reduction effect of the gasket itself reduces the impact of the vibration generated by the rotation of the motor 3 on the compressor accessories, making the compressor run more stably.

[0030] Specifically, such as Figure 4 As shown, the rotating shaft 4 is provided with a step surface 41 near the tail end, and the spring 6 is located between the step surface 41 of the rotating shaft 4 and a side surface of the bearing 7 close to the rotating shaft 4, thereby providing axial preload after the rotating shaft 4 and the bearing 7 are assembled, thereby achieving the purpose of reducing vibration and noise.

[0031] Specifically, such as Figure 5 The rotor 32 shown has a mounting hole inside, and the rotating shaft 4 cooperates with the mounting hole; a number of axially distributed protrusions 321 are provided inside the mounting hole, and the protrusions 321 abut against the connected rotating shaft 4 to improve the interference fit effect between the rotating shaft 4 and the rotor 32, making the rotation of the rotating shaft 4 more stable. At the same time, it also increases the heat dissipation channel, so that heat can be dissipated between the strip-shaped protrusions 321, preventing overheating of components due to heat accumulation.

[0032] Specifically, the end cover 23 end face is provided with a pressure relief valve 232, the pressure relief valve 232 will be opened automatically when the pressure reaches the set safety value, part or all of the high pressure gas is discharged from the system, thereby avoiding the damage of the compressor components due to excessive pressure.

[0033] In use, after the assembly of the components is completed, the stator 31 is connected to the power supply through the general control unit 1, and the rotor 32 rotates accordingly; the tail end of the rotating shaft 4 is inserted into the bearing one 7, and the spring 6 between the stepped surface 41 of the rotating shaft 4 and the bearing one 7 is compressed, thereby providing an axial pre-tightening force for the rotating shaft 4 and the bearing one 7, thereby avoiding the axial or circumferential jumping of the rotating shaft 4; the rotating shaft 4 rotates smoothly synchronously with the rotor 32 due to the protrusions inside the rotor 32, at this time, under the rotation of the rotating shaft 4, the scroll part 5 compresses the low-pressure gas entering the low-pressure cavity from the air inlet 221 into high-pressure gas and transfers it to the high-pressure cavity, and then is discharged from the air outlet 232; the rotating shaft 4 runs smoothly during the entire compression process of the gas, achieving the purpose of reducing vibration and noise.

[0034] Specific embodiment two: please refer to Figure 6 A noise reduction and vibration reduction compressor, which is different from the first embodiment, is provided with a wave spring 9 on the side of the bearing one 7 away from the rotating shaft 4 instead of the spring 6 between the rotating shaft 4 and the bearing one 7; the wave spring 9 is clamped between the bearing one 7 and the mounting groove 222, and can provide a pre-tightening force to the bearing one 7 and the rotating shaft 4 together; due to the large stiffness range of the wave spring 9, it can better absorb and dissipate energy when subjected to impact and vibration, reducing the propagation of vibration and noise, and at the same time, due to the compact structure of the wave spring 9, more axial space can be saved, and the distribution of the components of the compressor can be optimized.

[0035] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical scheme of the present application and its improvement concept within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A compressor with noise reduction and vibration reduction, characterized in that: It comprises a main control unit (1), a housing (2), a motor (3) detachably mounted inside the housing (2), a rotating shaft (4), and a vortex unit (5); the main control unit (1) is detachably mounted at the rear end of the housing (2), and is electrically connected to the motor (3) for driving the motor (3) to rotate; The housing (2) comprises a front housing (21), a rear housing (22) and an end cover (23) which are detachably connected in sequence; the vortex portion (5) is detachably mounted on the inner side of the front housing (21) and is used to compress gas under the drive of a rotating shaft; the motor (3) is detachably mounted on the inner side of the rear housing (22), the motor (3) comprising a stator (31) and a rotor (32); the stator (31) is detachably mounted inside the rear housing (22) and is electrically connected to the main control portion (1); the rotor (32) is rotatably connected to the stator (31); the rear housing (22) is provided with an air inlet (221); and the side of the end cover (23) is provided with an exhaust port (231); A faceplate (24) is provided on one side of the front shell (21) close to the rear shell (22); the rear end of the rotating shaft (4) contacts the rear end inside the rear shell (22); the front end of the rotating shaft (4) extends and penetrates the inner side of the faceplate (24); the outer wall of the rotating shaft (4) is interference-connected or detachably connected to the rotor (32) of the motor (3); and a spring (6) is provided at the rear end of the rotating shaft (4) for providing a preload force to the rotating shaft (4) and a bearing member supporting the rotating shaft (4).

2. A noise-reducing and vibration-reducing compressor according to claim 1, characterized in that: A mounting groove (222) is provided at the center of the rear end of the rear shell (22), and a bearing (7) is detachably installed inside the mounting groove (222). The outer ring of the bearing (7) cooperates with the inner wall of the mounting groove (222), and the inner ring of the bearing (7) cooperates with the rear end of the rotating shaft (4); a bearing (8) is provided on the inner side of the faceplate (24), and the outer wall of the side of the rotating shaft (4) away from the rear end cooperates with the inner ring of the bearing (8), and the outer ring of the bearing (8) cooperates with the faceplate (24).

3. A noise-reducing and vibration-reducing compressor according to claim 2, characterized in that: The rotating shaft (4) is provided with a stepped surface (41) near the tail end, and the spring (6) is located between the stepped surface (41) of the rotating shaft (4) and a side surface of the bearing (7) near the rotating shaft (4), and is used to provide an axial preload force after the rotating shaft (4) and the bearing (7) are assembled.

4. The compressor with noise reduction and vibration reduction according to claim 2, characterized in that: The faceplate (24) is fixedly mounted on a side of the front shell (21) close to the rear shell (22), and comprises a bearing mounting portion (241), an eccentric block mounting portion (242) and a plurality of support plates (243) uniformly distributed radially inward; the bearing mounting portion (241) is used to assemble the second bearing (8), and the inner wall of the eccentric block mounting portion (242) is rotatably connected to the eccentric block, so as to ensure the stability of the rotation of the rotating shaft (4); one end of the support plate (243) is fixedly connected to the inner wall of the front shell (21), and the other end is fixedly connected to the outer wall of the bearing mounting portion (241), so as to improve the supporting strength of the faceplate (24).

5. The compressor with noise reduction and vibration reduction according to claim 1, characterized in that: A sealing gasket 1 (25) is provided at the connection between the front shell (21) and the rear shell (22), and a sealing gasket 2 (26) is provided at the connection between the end cover (23) and the front shell (21), for sealing the interior of the compressor.

6. The compressor with noise reduction and vibration reduction according to claim 1, characterized in that: A mounting hole is provided inside the rotor (32), and the rotating shaft (4) cooperates with the mounting hole; a plurality of axially distributed protrusions (321) are provided inside the mounting hole, and the protrusions (321) abut against the rotating shaft (4) to ensure stable rotation of the rotating shaft (4).

7. The compressor with noise reduction and vibration reduction according to claim 1, characterized in that: The end surface of the end cover (23) is provided with a pressure relief valve (232), which is used to discharge part or all of the high-pressure gas from the system, thereby preventing the internal components of the compressor from being damaged due to excessive pressure.

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