Vibration reduction pump body structure and compressor

Abstract

The utility model relates to a vibration reduction pump body structure and a compressor. The vibration reduction pump body structure comprises a pump body main body and an auxiliary bearing, a main bearing is arranged on the pump body, a plurality of threaded holes are formed in the outer side wall of the main bearing in the radial direction in an inward concave mode, and the threaded holes are formed at intervals. The auxiliary bearings are arranged around the peripheral wall of the main bearing at intervals, limiting through grooves are formed in the auxiliary bearings and correspond to the threaded holes in the radial direction in a penetrating mode, screw rods are movably arranged in the limiting through grooves, and one ends of the screw rods penetrate through the limiting through grooves inwards in the radial direction and are in threaded connection with the interiors of the corresponding threaded holes; and a plurality of buffer springs are arranged between the auxiliary bearing and the main bearing. According to the vibration reduction pump body structure, the buffering design between the main bearing and the auxiliary bearing is utilized, vibration transmitted to a compressor shell by the pump body structure can be effectively reduced, and therefore the noise problem of a compressor is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a vibration-damping pump body structure and a compressor. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It draws low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it, and then discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle. It is commonly used in refrigeration equipment such as air conditioners.

[0003] A rotary compressor primarily consists of a compressor housing, a pump body, and a rotor. The pump body is secured to the inner circumference of the compressor housing via a bearing flange. The rotor, mounted on the crankshaft within the pump body, provides the power for compressing gas. The basic principle of a rotary compressor is to utilize an eccentric crankshaft sleeve mounted on a piston, forming a working chamber for compressed gas with the cylinder. This chamber is then separated into an intake chamber and a compression chamber by a slider. Due to the eccentric nature of the crankshaft, the pump body generates a certain amount of vibration during operation, which can cause noise issues. To address this vibration, balancing weights are typically added to the rotor to achieve overall dynamic balancing of the rotor and pump body, but this has limited effectiveness. Furthermore, because the pump body's bearing flange is welded to the compressor housing, vibrations generated by the pump body during operation are directly transmitted to the compressor housing, causing the entire compressor to vibrate, further contributing to noise issues. Utility Model Content

[0004] Based on this, the purpose of the present invention is to overcome the shortcomings of the existing technology and provide a vibration-damping pump body structure. By utilizing the buffer design between the main bearing and the auxiliary bearing, the vibration transmitted from the pump body structure to the compressor casing can be effectively reduced, thereby effectively improving the noise problem of the compressor.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present utility model is:

[0006] A vibration-damping pump structure comprises a pump body and an auxiliary bearing;

[0007] The pump body is provided with a main bearing, and the outer wall of the main bearing is radially inwardly recessed with a plurality of threaded holes, which are arranged at intervals;

[0008] The auxiliary bearings are arranged at intervals around the outer peripheral wall of the main bearing. A limiting groove is radially penetrated on the auxiliary bearing corresponding to each of the threaded holes. A screw is movably provided in the limiting groove. One end of the screw radially inwardly passes through the limiting groove and is threadedly connected to the corresponding threaded hole. A plurality of buffer springs are arranged between the auxiliary bearing and the main bearing.

[0009] As an embodiment, a plurality of mounting shafts extend from the inner circumferential wall of the auxiliary bearing at radial intervals, each mounting shaft is sleeved with the buffer spring, and the radial length of each mounting shaft is smaller than the distance between the auxiliary bearing and the main bearing; the two ends of the buffer spring respectively abut against the inner circumferential wall of the auxiliary bearing and the outer circumferential wall of the main bearing.

[0010] As an embodiment, the length of the buffer spring is L, the distance between the auxiliary bearing and the main bearing is D, and the relationship between L and D is: L≥D; the radial length of the mounting shaft is d, and the relationship between d and D is: 0<d≤D / 2.

[0011] As an embodiment, the number of the installation shafts is three, and the three installation shafts are evenly distributed on the inner circumferential wall of the auxiliary bearing.

[0012] As an embodiment, the auxiliary bearing is a circular ring structure.

[0013] As an embodiment, the limiting through groove includes a nut limiting portion and a screw limiting portion, the nut limiting portion is coaxially arranged and connected to the screw limiting portion, and the inner diameter of the nut limiting portion is larger than the inner diameter of the screw limiting portion; one end of the screw is coaxially connected to a nut, and the end of the screw away from the nut passes through the nut limiting portion and the screw limiting portion in sequence and then is threadedly connected to the corresponding threaded hole.

[0014] As an embodiment, the thickness of the nut is t, the radial width of the nut limiting portion is T, and t and T satisfy the relationship: t<T.

[0015] As an embodiment, the number of the threaded holes is three, and the three threaded holes are evenly distributed in the main bearing.

[0016] As an embodiment, the pump body also includes a cylinder assembly, a secondary bearing, a crankshaft, and a rotor piston. The main bearing, the cylinder assembly, and the secondary bearing are detachably installed to form an independent refrigerant compression space. The crankshaft is rotatable around the axis and passes through the main bearing, the cylinder assembly, and the secondary bearing. The rotor piston is sleeved on the crankshaft, and the rotor piston is movably arranged in the refrigerant compression space.

[0017] Compared with the traditional technology, the beneficial effects of the vibration reduction pump body structure described in the utility model are:

[0018] The connection between the pump body and the auxiliary bearing of the embodiment of the utility model adopts a flexible connection buffering method, specifically, a screw passes through the auxiliary bearing and is threadedly connected to the main bearing of the pump body, and the clearance between the screw and the auxiliary bearing is used to enable the main bearing to be supported on the auxiliary bearing, and the main bearing can move radially relative to the auxiliary bearing; and a buffer spring is provided between the inner circumferential wall of the auxiliary bearing and the outer circumferential wall of the main bearing. In this way, when the vibration generated by the operation of the pump body is transmitted to the auxiliary bearing, a part of the vibration can be offset by the buffering effect of the buffer spring, thereby effectively reducing the vibration transmitted from the pump body structure to the compressor casing, and improving the noise problem of the compressor.

[0019] In addition, an embodiment of the present invention further provides a compressor comprising a compressor housing and a vibration-damping pump structure according to any of the above embodiments, wherein the outer peripheral wall of the auxiliary bearing is connected to the inner peripheral wall of the compressor housing. By improving the vibration-damping pump structure and utilizing a buffering design between the main bearing and the auxiliary bearing, the compressor of this embodiment of the present invention can effectively reduce vibration transmitted from the pump structure to the compressor housing, thereby effectively improving the noise problem of the compressor.

[0020] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural diagrams of the vibration-damping pump body structure of an embodiment of the present utility model;

[0022] Figure 2 This is the second structural diagram of the vibration-damping pump structure of an embodiment of the present utility model;

[0023] Figure 3 This is the third structural diagram of the vibration-damping pump structure of an embodiment of the present utility model;

[0024] Figure 4 This is a structural diagram of the pump body of the vibration-damping pump structure according to an embodiment of the present utility model;

[0025] Figure 5 A schematic structural diagram of an auxiliary bearing of a vibration-damping pump structure according to an embodiment of the present utility model;

[0026] Figure 6 for Figure 5 An enlarged schematic diagram of section A is shown.

[0027] Description of reference numerals:

[0028] 10. Main bearing; 11. Threaded hole; 12. Screw; 13. Nut; 20. Auxiliary bearing; 21. Limiting groove; 22. Buffer spring; 23. Mounting shaft; 24. Nut limiting part; 25. Screw limiting part; 30. Cylinder assembly; 40. Auxiliary bearing; 50. Crankshaft. DETAILED DESCRIPTION

[0029] To further illustrate various embodiments, this utility model is provided with accompanying drawings. These drawings form part of the disclosure of this utility model and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will be able to understand other possible implementations and the advantages of this utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0031] In the related art, a rotary compressor mainly includes a compressor housing, a pump body, and a rotor. The pump body is fixed to the inner circumferential wall of the compressor housing through a bearing flange, and the rotor is on the crankshaft in the pump body, providing power for the pump body to compress gas. The basic principle of a rotary compressor is to use an eccentric crankshaft sleeve mounted on the piston to form a working chamber for compressed gas with the cylinder, and then use a slider to separate the working chamber into an intake chamber and a compression chamber. Due to the eccentric nature of the crankshaft itself, the pump body generates a certain amount of vibration during operation, which causes certain noise problems. In order to improve the vibration problem of the pump body, a balancing block is usually added to the rotor to achieve overall dynamic balance of the rotor and pump body, but the effect is limited. In addition, since the bearing flange of the pump body and the compressor housing are fixed by welding, the vibration generated by the pump body during operation will be directly transmitted to the compressor housing, causing the entire compressor to vibrate, thereby causing more noise problems.

[0032] In view of this, an embodiment of the present invention provides a vibration-damping pump body structure, which utilizes a buffer design between the main bearing and the auxiliary bearing to effectively reduce the vibration transmitted from the pump body structure to the compressor casing, thereby effectively improving the noise problem of the compressor.

[0033] See also Figures 1 to 6; An embodiment of the present utility model provides a vibration-damping pump body structure, including a pump body main body and an auxiliary bearing 20; a main bearing 10 is provided on the pump body main body, and a plurality of threaded holes 11 are radially recessed on the outer wall of the main bearing 10, and the plurality of threaded holes 11 are arranged at intervals; the auxiliary bearing 20 is arranged at intervals around the outer peripheral wall of the main bearing 10, and a limiting through groove 21 is radially penetrated on the auxiliary bearing 20 corresponding to each of the threaded holes 11, and a screw 12 is movably provided in the limiting through groove 21, and one end of the screw 12 radially inwardly passes through the limiting through groove 21 and is threadedly connected to the corresponding threaded hole 11; a plurality of buffer springs 22 are provided between the auxiliary bearing 20 and the main bearing 10.

[0034] Therefore, the connection between the pump body and the auxiliary bearing 20 of the embodiment of the utility model adopts a flexible connection buffering method, specifically, the screw 12 passes through the auxiliary bearing 20 and is threadedly connected to the main bearing 10 of the pump body, and the clearance between the screw 12 and the auxiliary bearing 20 is used to enable the main bearing 10 to be supported on the auxiliary bearing 20, and the main bearing 10 can move radially relative to the auxiliary bearing 20; and a buffer spring 22 is provided between the inner circumferential wall of the auxiliary bearing 20 and the outer circumferential wall of the main bearing 10. In this way, when the vibration generated by the operation of the pump body is transmitted to the auxiliary bearing 20, part of the vibration can be offset by the buffering effect of the buffer spring 22, thereby effectively reducing the vibration transmitted from the pump body structure to the compressor casing, thereby improving the noise problem of the compressor.

[0035] In an embodiment of the present utility model, the pump body also includes a cylinder assembly 30, a secondary bearing 40, a crankshaft 50, and a rotor piston. The main bearing 10, the cylinder assembly 30 and the secondary bearing 40 can be detachably installed to form an independent refrigerant compression space. The crankshaft 50 can be rotatably arranged around the axis through the main bearing 10, the cylinder assembly 30 and the secondary bearing 40. The rotor piston is sleeved on the crankshaft 50, and the rotor piston is movably arranged in the refrigerant compression space.

[0036] In order to facilitate the positioning and installation of the buffer spring 22, in some embodiments of the present invention, a plurality of mounting shafts 23 extend from the inner circumferential wall of the auxiliary bearing 20 at radial intervals, and each mounting shaft 23 is sleeved with the buffer spring 22, and the radial length of each mounting shaft 23 is smaller than the distance between the auxiliary bearing 20 and the main bearing 10; the two ends of the buffer spring 22 respectively abut against the inner circumferential wall of the auxiliary bearing 20 and the outer circumferential wall of the main bearing 10.

[0037] Optionally, in these embodiments, the length of the buffer spring 22 is L, the distance between the auxiliary bearing 20 and the main bearing 10 is D, and the relationship between L and D satisfies the equation: L ≥ D; the radial length of the mounting shaft 23 is d, and the relationship between d and D satisfies the equation: 0 < d ≤ D / 2. Specifically, the length L of the buffer spring 22 can be 1.1D, and the radial length d of the mounting shaft 23 can be D / 3.

[0038] In some embodiments of the present invention, there are three mounting shafts 23, each evenly distributed on the inner circumferential wall of the auxiliary bearing 20. Thus, the three mounting shafts 23 are each sleeved with a buffer spring 22, and the line connecting the three mounting shafts 23 forms an equilateral triangle. However, it should be noted that the number of mounting shafts 23 and buffer springs 22 in the present invention can be varied according to actual needs and is not limited to the three shown in these embodiments.

[0039] Optionally, in some embodiments of the present invention, the auxiliary bearing 20 is an annular structure. In this way, in these embodiments, the outer peripheral wall of the auxiliary bearing 20 can better form a clearance fit with the inner peripheral wall of the compressor housing and be welded and fixed, thereby enabling the overall vibration-damping pump body structure to be more firmly combined with the compressor housing.

[0040] In some embodiments of the present invention, the limiting groove 21 includes a nut limiting portion 24 and a screw limiting portion 25. The nut limiting portion 24 is coaxially arranged and connected to the screw limiting portion 25. The inner diameter of the nut limiting portion 24 is larger than the inner diameter of the screw limiting portion 25. One end of the screw 12 is coaxially connected to the nut 13, and the end of the screw 12 away from the nut 13 passes through the nut limiting portion 24 and the screw limiting portion 25 in sequence and then is threadedly connected to the corresponding threaded hole 11.

[0041] To prevent the nut 13 from protruding beyond the outer circumferential wall of the auxiliary bearing 20, in these embodiments, the thickness of the nut 13 is t, and the radial width of the nut stop 24 is T, with t and T satisfying the relationship: t < T. Therefore, by designing the thickness t of the nut 13 to be smaller than the radial width T of the nut stop 24, the nut 13 is prevented from protruding beyond the outer circumferential wall of the auxiliary bearing 20 while providing space for radial sliding between the screw 12 and the nut 13. This allows the main bearing 10 to vibrate in the radial direction of one of the screws 12 and compress the buffer spring 22, thereby achieving a vibration-damping effect. Furthermore, the nut stop 24 effectively prevents the nut 13 from protruding beyond the screw stop 25. This allows the screw 12 to both support the pump body and guide it during radial displacement.

[0042] In addition, in order to facilitate the tightening and loosening of the screw rod 12 , in the embodiment of the present invention, the outer diameter of the nut 13 is smaller than the inner diameter of the nut limiting portion 24 , so as to facilitate the cooperation between the tool and the nut 13 .

[0043] Optionally, in some embodiments of the present invention, there are three threaded holes 11, which are evenly distributed in the main bearing 10. Accordingly, there are also three position-limiting slots 21 on the auxiliary bearing 20, and three screw rods 12. Similarly, in other embodiments, the number of threaded holes 11, screw rods 12, and position-limiting slots 21 can be designed accordingly based on actual needs.

[0044] In addition, an embodiment of the present invention further provides a compressor comprising a compressor housing and a vibration-damping pump body structure according to any of the above embodiments, wherein the outer peripheral wall of the auxiliary bearing 20 is connected to the inner peripheral wall of the compressor housing. By improving the vibration-damping pump body structure and utilizing a buffering design between the main bearing 10 and the auxiliary bearing 20, the compressor of this embodiment of the present invention can effectively reduce vibration transmitted from the pump body structure to the compressor housing, thereby effectively improving the noise problem of the compressor.

[0045] The above-described embodiments represent only a few implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention's vibration-damping pump structure and compressor. It should be noted that those skilled in the art will readily appreciate that variations and improvements can be made without departing from the present invention, and these variations and improvements are fully within the scope of protection of the present invention.

Claims

1. A vibration-damping pump structure, characterized in that: Including pump body and auxiliary bearing; The pump body is provided with a main bearing, and the outer wall of the main bearing is radially inwardly recessed with a plurality of threaded holes, and the plurality of threaded holes are arranged at intervals; The auxiliary bearings are arranged at intervals around the outer peripheral wall of the main bearing, and the auxiliary bearings are provided with limiting grooves radially penetrating therethrough corresponding to each of the threaded holes. A screw is movably arranged in the limiting groove, and one end of the screw radially passes through the limiting groove inward and is threadedly connected in the corresponding threaded hole; a plurality of buffer springs are arranged between the auxiliary bearings and the main bearings.

2. The vibration-damping pump structure according to claim 1, characterized in that: The inner circumferential wall of the auxiliary bearing extends out a plurality of mounting shafts at radial intervals, each mounting shaft is sleeved with the buffer spring, and the radial length of each mounting shaft is smaller than the distance between the auxiliary bearing and the main bearing; the two ends of the buffer spring respectively abut against the inner circumferential wall of the auxiliary bearing and the outer circumferential wall of the main bearing.

3. The vibration-damping pump structure according to claim 2, characterized in that: The length of the buffer spring is L, the distance between the auxiliary bearing and the main bearing is D, and the relationship between L and D is: L≥D; the radial length of the mounting shaft is d, and the relationship between d and D is: 0<d≤D / 2.

4. The vibration-damping pump structure according to claim 2, characterized in that: The number of the installation shafts is three, and the three installation shafts are evenly distributed on the inner peripheral wall of the auxiliary bearing.

5. The vibration-damping pump structure according to claim 1, characterized in that: The auxiliary bearing is a circular ring structure.

6. The vibration-damping pump structure according to claim 1, characterized in that: The limiting through groove includes a nut limiting portion and a screw limiting portion, the nut limiting portion is coaxially arranged and connected with the screw limiting portion, and the inner diameter of the nut limiting portion is larger than the inner diameter of the screw limiting portion; a nut is coaxially connected to one end of the screw, and the end of the screw away from the nut passes through the nut limiting portion and the screw limiting portion in sequence and then is threadedly connected in the corresponding threaded hole.

7. The vibration-damping pump structure according to claim 6, characterized in that: The thickness of the nut is t, the radial width of the nut limiting portion is T, and t and T satisfy the relationship: t<T.

8. The vibration-damping pump structure according to claim 1, characterized in that: The number of the threaded holes is three, and the three threaded holes are evenly distributed in the main bearing.

9. The vibration-damping pump structure according to claim 1, characterized in that: The pump body also includes a cylinder assembly, a secondary bearing, a crankshaft, and a rotor piston. The main bearing, the cylinder assembly, and the secondary bearing are detachably installed to form an independent refrigerant compression space. The crankshaft is rotatably arranged around the main bearing, the cylinder assembly, and the secondary bearing. The rotor piston is sleeved on the crankshaft, and the rotor piston is movably arranged in the refrigerant compression space.

10. A compressor, characterized in that: It comprises a compressor housing and a vibration-damping pump body structure as claimed in any one of claims 1 to 9, wherein the outer peripheral wall of the auxiliary bearing is connected to the inner peripheral wall of the compressor housing.

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