CN110541828A

CN110541828A - Eccentric adjusting structure and compressor with same

Info

Publication number: CN110541828A
Application number: CN201910894377.9A
Authority: CN
Inventors: 魏会军; 李雪峰; 康小丽; 单彩侠; 刘韵; 陈肖汕; 陈江嘉
Original assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Current assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2019-12-06

Abstract

the invention provides an eccentric adjusting structure and a compressor with the same, wherein the eccentric adjusting structure comprises: the driving shaft is provided with a first limiting structure; the eccentric bushing is provided with a second limiting structure matched with the first limiting structure, and the driving shaft penetrates through the eccentric bushing; and the buffer structure is arranged between the first limit structure and the second limit structure and is used for buffering when the driving shaft and the eccentric bushing rotate relatively. Through the technical scheme provided by the invention, the technical problem of low reliability of the compressor in the prior art can be solved.

Description

Eccentric adjusting structure and compressor with same

Technical Field

the invention relates to the technical field of compressors, in particular to an eccentric adjusting structure and a compressor with the same.

Background

At present, the air conditioning system for the vehicle can change along with road conditions to a certain extent, so that the requirement on the running reliability of a compressor is high. When the compressor operates in a low-temperature environment, the refrigerant in the compressor is easy to change into a liquid state, and the phenomenon of liquid impact caused by starting air suction and liquid entrainment is avoided. In addition, due to the limitation of the existing machining process, the wall thickness of the vortex body fluctuates in a small range, so that the meshing precision of the side wall surface of the wrap tooth is influenced, and further the radial sealing performance of the compressor is poor.

In the prior art, a structure capable of changing the revolving radius of the movable scroll is generally adopted, and the actual eccentricity of the main shaft is adjusted in time, so that the side wall surfaces of the two scroll wrap teeth keep reasonable contact stress. When the suction gas takes liquid, the radial clearance of the compression cavity can be instantly enlarged, the action of abnormal load is relieved, the fragmentation caused by overlarge stress of the wrap teeth of the vortex body is avoided, the eccentric amount can quickly return to the normal value after the abnormal load is eliminated, and the reliable and stable operation of the compressor is ensured.

An eccentric bush is generally provided as an intermediate member between the eccentric shaft of the drive shaft and the bearing of the hub of the orbiting scroll, and is used to change the running radius of the orbiting scroll at a proper timing. The rotating angle range of the eccentric pin sleeve is limited, so that the abnormity caused by excessive change of the eccentric amount is avoided, the center of the movable disc is self-adaptively close to or far away from the center of the fixed disc in a reasonable range according to the actual condition, and the flexible adjustment of the radial clearance of the wrap of the vortex body is realized.

However, with the conventional eccentric adjusting structure, when the scroll compressor is started and the main shaft rotates, the main shaft and the bushing weight block collide and define the eccentric bushing rotation range in a line contact manner. The contact area of the main shaft and the bush is small, the linear contact areas are mutually extruded when the main shaft and the bush rotate at high speed, material deformation is easily generated to cause blocking, the timely adjustment function of the eccentric amount of the main shaft is caused to lose efficacy, and the operation reliability of the compressor is reduced.

Disclosure of Invention

The invention mainly aims to provide an eccentric adjusting structure and a compressor with the same, so as to solve the technical problem that the compressor in the prior art is low in reliability.

In order to achieve the above object, according to one aspect of the present invention, there is provided an eccentric adjustment structure including: the driving shaft is provided with a first limiting structure; the eccentric bushing is provided with a second limiting structure matched with the first limiting structure, and the driving shaft penetrates through the eccentric bushing; and the buffer structure is arranged between the first limit structure and the second limit structure and is used for buffering when the driving shaft and the eccentric bushing rotate relatively.

Furthermore, one of the first limiting structure and the second limiting structure is a limiting groove, the other of the first limiting structure and the second limiting structure is a limiting protrusion, and the buffer structure is arranged between the limiting groove and the limiting protrusion.

Furthermore, the limiting protrusion is provided with a protrusion wall, the limiting groove is provided with a groove wall, one end of the buffer structure is arranged on the protrusion wall, and the other end of the buffer structure is arranged on the groove wall.

Further, the convex wall comprises a first side wall and a second side wall which are oppositely arranged, the groove wall comprises a third side wall and a fourth side wall which are oppositely arranged, the first side wall and the third side wall are oppositely arranged, and the second side wall and the fourth side wall are arranged at intervals; the buffer structure comprises a first buffer part and a second buffer part, one end of the first buffer part is connected with the first side wall, and the other end of the first buffer part is connected with the third side wall; one end of the second buffer part is connected with the second side wall, and the other end of the second buffer part is connected with the fourth side wall.

Further, the first buffer is a spring; and/or the second dampener is a spring.

further, the buffer structure is an elastic buffer plate, and the elastic buffer plate is arranged on the convex wall and/or the concave wall.

Furthermore, the limiting protrusion is provided with a protrusion wall, the buffer structure is provided with a connecting end and a buffer end, the connecting end is arranged on the protrusion wall, and the buffer end and the protrusion wall are provided with a gap.

Furthermore, the buffer structure comprises two third buffer parts, and each third buffer part is provided with a buffer end and a connecting end which are oppositely arranged; the limiting protrusion is provided with a protrusion wall, the protrusion wall is provided with a first side wall and a second side wall which are oppositely arranged, the connecting end of one third buffering piece is arranged on the first side wall, and the connecting end of the other third buffering piece is arranged on the second side wall.

Furthermore, the driving shaft comprises a main shaft section and an eccentric shaft section, the main shaft section is connected with the eccentric shaft section, and the first limiting structure is arranged on the main shaft section; the eccentric bushing comprises a main body part and a counterweight part, the counterweight part is arranged on the main body part, a second limiting structure is arranged on the counterweight part, and the eccentric shaft section is arranged on the main body part in a penetrating mode.

according to another aspect of the present invention, there is provided a compressor including an eccentric adjustment structure, the eccentric adjustment structure being the eccentric adjustment structure provided above.

By applying the technical scheme of the invention, the buffering structure is arranged between the first limiting structure and the second limiting structure, so that when the driving shaft and the eccentric bushing rotate relatively, the buffering structure is used for buffering, the problem of abnormal noise generated by instantaneous collision when the driving shaft and the eccentric bushing are contacted is solved, the contact area is increased, the extrusion stress is reduced, the clamping condition caused by large deformation is avoided, the main shaft can adjust the eccentric amount in time, and the operation reliability of the compressor is improved. Therefore, the technical problem of low reliability of the compressor in the prior art can be solved through the technical scheme provided by the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic structural view of an eccentric bushing according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram illustrating a drive shaft according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating an eccentric adjustment structure provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural diagram illustrating an eccentric adjustment structure provided according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram illustrating an eccentric adjustment structure provided in accordance with a third embodiment of the present invention;

Fig. 6 is a schematic structural diagram illustrating a compressor according to a fourth embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. A nose cover; 20. a fixed scroll; 30. a movable scroll; 40. a support; 50. a main bearing; 60. shaft sealing; 70. a housing; 80. a drive shaft; 81. a main shaft section; 82. an eccentric shaft section; 90. a motor rotor; 100. a motor stator; 110. an air suction port; 120. a secondary bearing; 130. an eccentric bushing; 131. a main body portion; 132. a counterweight portion; 140. a radial bearing; 150. an anti-rotation mechanism; 160. a vent valve assembly; 170. exhaust gas oil content; 180. a buffer structure; 181. a first buffer member; 182. a second buffer member; 183. a third buffer member; 190. a limiting groove; 200. and a limiting bulge.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 5, an embodiment of the present invention provides an eccentric adjustment structure including a driving shaft 80, an eccentric bush 130, and a buffering structure 180. The driving shaft 80 is provided with a first limiting structure, the eccentric bushing 130 is provided with a second limiting structure matched with the first limiting structure, and the driving shaft 80 penetrates through the eccentric bushing 130. The buffering structure 180 is disposed between the first limiting structure and the second limiting structure, and buffers the relative rotation between the driving shaft 80 and the eccentric bushing 130 through the buffering structure 180.

Adopt the eccentric adjustment structure that this embodiment provided, when scroll compressor starts or stops, because the inertial action of eccentric bush 130 will make drive shaft 80 and eccentric bush 130 between have relative rotation, through buffer structure 180's cushioning effect, can make drive shaft 80 and eccentric bush 130 in the unusual noise problem that the contact instantaneous collision produced, contact area has been increased, extrusion stress has been reduced, thereby the dead circumstances of card that leads to greatly has avoided warping, make the main shaft can adjust the eccentric volume in good time, thereby the operational reliability of compressor has been improved.

Specifically, one of the first limiting structure and the second limiting structure may be a limiting groove 190, and the other of the first limiting structure and the second limiting structure may be a limiting protrusion 200. Buffer structure 180 sets up between spacing recess 190 and spacing arch 200, adopts such setting, can play the spacing effect of buffering better, has increased the area of contact of drive shaft 80 with eccentric bush 130 better, has reduced extrusion stress, has avoided the contact surface to warp the serious dead problem of eccentric bush 130 card that leads to better. Specifically, the limiting groove 190 may be a fan-shaped groove, and correspondingly, the limiting protrusion 200 may be a fan-shaped limiting block.

As shown in FIG. 3, in the first embodiment of the present invention, the position-limiting protrusion 200 has a protrusion wall, and the position-limiting recess 190 has a recess wall. One end of the buffer structure 180 is disposed on the raised wall and the other end of the buffer structure 180 is disposed on the recessed wall. By adopting the structure, the eccentric bushing 130 and the main shaft can be better buffered, and the extrusion stress is reduced.

specifically, the convex wall in the first embodiment includes a first sidewall and a second sidewall that are disposed opposite to each other, the concave wall includes a third sidewall and a fourth sidewall that are disposed opposite to each other, the first sidewall is disposed opposite to the third sidewall, and the second sidewall is disposed at an interval from the fourth sidewall. The buffering structure 180 in this embodiment includes a first buffering member 181 and a second buffering member 182, wherein one end of the first buffering member 181 is connected to the first sidewall, and the other end of the first buffering member 181 is connected to the third sidewall. One end of the second buffer 182 is connected to the second sidewall, and the other end of the second buffer 182 is connected to the fourth sidewall. With this arrangement, the first cushion 181 and the second cushion 182 can improve the cushion effect.

Specifically, the first buffer 181 may be a spring; or the second dampener 182 can be a spring; or both the first and second dampers 181 and 182 may be springs. In order to achieve a better buffering effect, the first and second buffering members 181 and 182 of the present embodiment may be configured as springs. Specifically, in order to facilitate the fixation of the spring, in this embodiment, positioning holes are formed in two planes of the sector groove along the normal direction, and the spring is mounted in the positioning holes. For convenience of operation, the positioning hole can be a round hole.

as shown in fig. 4, a second embodiment of the present invention provides an eccentric adjustment structure, and the eccentric adjustment structure in the second embodiment is different from the eccentric adjustment structure in the first embodiment in the arrangement of a buffer structure 180. The buffer structure 180 in the second embodiment is an elastic buffer plate. Specifically, the elastic buffer plate may be provided on the convex wall; or the elastic buffer plate is arranged on the groove wall; or elastic buffer plates are provided on the convex wall and the concave wall.

in this embodiment, in order to achieve a better cushioning effect, the elastic cushioning plate is provided on the convex wall and the concave wall in this embodiment. The elastic buffer plate is arranged on the first side wall, the second side wall, the third side wall and the fourth side wall. Specifically, the elastic buffer plate in this embodiment is made of an elastic material, and may be a rubber plate. Specifically, when the main shaft of the driving shaft 80 contacts the eccentric bushing 130, the plane fit between the buffer plates can reduce the extrusion stress, prevent the material from deforming to cause the blocking, and the elastic rubber can also absorb the impact force of the collision, thereby reducing the collision noise of the device stopping the eccentric bushing 130.

In the first and second embodiments, the stopper protrusion 200 is provided on the eccentric bush 130, and the stopper groove 190 is provided on the main shaft.

As shown in fig. 5, a third embodiment of the present invention provides an eccentric adjustment structure, in which a limit protrusion 200 is provided on a main shaft, and a limit groove 190 is provided on an eccentric bushing 130. Specifically, the limiting protrusion 200 in this embodiment has a protrusion wall, and the buffering structure 180 has a connection end and a buffering end, the connection end is disposed on the protrusion wall, and the buffering end and the protrusion wall have a gap, so that a certain buffering area is formed between the buffering end and the protrusion wall. Specifically, the buffering end in this embodiment may be made of an elastic material to perform a buffering function.

specifically, the buffering structure 180 in this embodiment includes a third buffering member 183. The third buffers 183 are two, and the third buffers 183 have buffer ends and connection ends disposed opposite to each other. The limit projection 200 has a projection wall having a first side wall and a second side wall which are oppositely disposed, a connection end of one third cushion 183 is disposed on the first side wall, and a connection end of the other third cushion 183 is disposed on the second side wall. With such an arrangement, the two third buffering members 183 can better perform a buffering function, so that the extrusion stress can be reduced when the rotation in different directions is performed. Specifically, the third buffer 183 in this embodiment is an elastic valve plate, and the free end of the elastic valve plate plays a role of a valve plate baffle. The elastic valve sheet may be integrally formed with or separate from the main shaft of the driving shaft 80.

In the first, second and third embodiments, the drive shaft 80 includes a main shaft segment 81 and an eccentric shaft segment 82. The main shaft section 81 is connected with the eccentric shaft section 82, and the first limiting structure is arranged on the main shaft section 81. The eccentric bushing 130 includes a main body 131 and a counterweight 132, the counterweight 132 is disposed on the main body 131, the counterweight 132 is provided with a second limiting structure, and the eccentric shaft segment 82 is disposed on the main body 131 in a penetrating manner. Specifically, the eccentric bushing 130 is provided with an inner hole in clearance fit with the eccentric shaft of the driving shaft 80, and the center of the inner hole deviates from the center of the outer circular surface of the eccentric bushing 130.

As shown in fig. 6, a fourth embodiment of the present invention provides a compressor including an eccentric adjustment structure, where the eccentric adjustment structure is the eccentric adjustment structure provided in the first embodiment or the second embodiment or the third embodiment. The compressor in the embodiment can eliminate abnormal load, realize the automatic adjustment of the eccentric amount, reduce the noise of the instant collision of the contact between the eccentric bushing 130 and the main axis, and avoid the problem of jamming caused by extrusion deformation.

The compressor in the present embodiment is a scroll refrigeration compressor, and includes a head cover 10, a fixed scroll 20, an orbiting scroll 30, a bracket 40, a main bearing 50, a shaft seal 60, a casing 70, a drive shaft 80, a motor rotor 90, a motor stator 100, an intake port 110, a sub-bearing 120, an eccentric bush 130, a radial bearing 140, a rotation prevention mechanism 150, an exhaust valve assembly 160, exhaust oil 170, and the like.

Specifically, the main shaft portion of the drive shaft 80 in this embodiment is supported by the main bearing 50 and the sub bearing 120, and is rotated by the motor rotor 90. The eccentric bushing 130 is sleeved on the driving shaft 80 of the driving shaft 80, and the outer circle shaft section of the eccentric bushing 130 is inserted into the bearing seat of the hub at the back of the movable scroll 30. During the operation of the driving shaft 80, the orbiting scroll 30 is driven by the eccentric shaft of the driving shaft 80 to perform a non-self-rotation orbiting translation within the limit of the self-rotation preventing mechanism 150. The wraps of the fixed scroll 20 and the movable scroll 30 are engaged with each other to form crescent closed volume chambers with increasing pressure from outside to inside, and the closed volume chambers are correspondingly expanded or reduced under the continuous driving of the motor rotor 90, so that the purposes of suction, compression and exhaust of gaseous refrigerants are realized, and the refrigeration cycle is completed.

The eccentric bush 130 rotates within a small range about the main shaft eccentric shaft while rotating with the driving shaft 80 to adjust the eccentricity amount. When the rotation of the driving shaft 80 is started or the rotation of the driving shaft 80 is finished, the eccentric bushing 130 and the driving shaft 80 are in contact at the extreme angle position of the eccentricity adjustment due to the inertia, and the two parts are pressed against each other due to the force when the two parts are in contact. The eccentric bushing 130 with the balance block before the use of the present patent is in line contact with the driving shaft 80 at the rotation angle limit position, the contact area is small, the contact stress is large, the contact positions of the two parts are easy to deform, the phenomenon of blocking easily occurs due to mutual occlusion, and the eccentric amount of the eccentric bushing 130 is a fixed value under the condition of subsequent other working conditions or abnormal loads, so that the eccentric amount adjusting function fails.

In this embodiment, a fan-shaped limiting block is disposed at a step of the balancing weight block and the axial limiting surface of the eccentric bushing 130, a fan-shaped groove is formed at the head of the spindle of the driving shaft 80, and springs may be respectively disposed between two planes of the fan-shaped limiting block and two planes of the fan-shaped groove. When the driving shaft 80 stops as the scroll compressor stops, the eccentric bush 130 continues to rotate in the rotational direction due to the inertial force, and the spring can play a role in braking the rotation of the eccentric bush 130 due to the inertial force, reducing the rotational speed of the eccentric bush 130, and preventing the eccentric bush 130 from colliding with or directly contacting the driving shaft 80.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the contact surface during extrusion is increased, the extrusion stress is reduced, and the phenomenon that the eccentric bushing is blocked due to serious deformation of the contact surface is avoided; the problem of abnormal noise generated by the inertia effect of the eccentric bushing when the scroll compressor is started or stopped is solved; the eccentric amount can be automatically adjusted conveniently, the requirements on processing and assembly are reduced, and the interchangeability of parts is good.

the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An eccentric adjustment structure, comprising:

The driving shaft (80), wherein a first limiting structure is arranged on the driving shaft (80);

The eccentric bushing (130) is provided with a second limiting structure matched with the first limiting structure, and the driving shaft (80) penetrates through the eccentric bushing (130);

And the buffer structure (180) is arranged between the first limit structure and the second limit structure and is used for buffering when the driving shaft (80) and the eccentric bushing (130) rotate relatively.

2. The eccentric adjustment structure of claim 1, characterized in that one of the first and second limit structures is a limit recess (190) and the other of the first and second limit structures is a limit projection (200), the buffer structure (180) being disposed between the limit recess (190) and the limit projection (200).

3. The eccentric adjustment structure according to claim 2, characterized in that the limit projection (200) has a projection wall, the limit groove (190) has a groove wall, one end of the buffer structure (180) is provided on the projection wall, and the other end of the buffer structure (180) is provided on the groove wall.

4. the eccentric adjustment structure of claim 3, wherein the protrusion wall comprises a first sidewall and a second sidewall that are oppositely disposed, the groove wall comprises a third sidewall and a fourth sidewall that are oppositely disposed, the first sidewall is oppositely disposed from the third sidewall, and the second sidewall is spaced apart from the fourth sidewall; the buffering structure (180) comprises a first buffering member (181) and a second buffering member (182), one end of the first buffering member (181) is connected with the first side wall, and the other end of the first buffering member (181) is connected with the third side wall; one end of the second buffer member (182) is connected to the second side wall, and the other end of the second buffer member (182) is connected to the fourth side wall.

5. The eccentric adjustment structure according to claim 4,

The first buffer member (181) is a spring; and/or the presence of a gas in the gas,

The second dampener (182) is a spring.

6. An eccentric adjustment structure according to claim 4, characterized in that the damping structure (180) is an elastic damping plate, which is arranged on the raised wall and/or the groove wall.

7. The eccentric adjustment structure according to claim 2, characterized in that the stopper protrusion (200) has a protrusion wall, and the buffer structure (180) has a connection end provided on the protrusion wall and a buffer end spaced from the protrusion wall.

8. The eccentric adjustment structure according to claim 7, characterized in that the buffering structure (180) comprises two third buffers (183), the third buffers (183) having the buffering ends and the connecting ends which are oppositely arranged; the limiting protrusion (200) is provided with a protrusion wall, the protrusion wall is provided with a first side wall and a second side wall which are oppositely arranged, the connecting end of one third buffering piece (183) is arranged on the first side wall, and the connecting end of the other third buffering piece (183) is arranged on the second side wall.

9. The eccentric adjustment arrangement according to claim 1, characterized in that the drive shaft (80) comprises a main shaft section and an eccentric shaft section, the main shaft section being arranged in connection with the eccentric shaft section, the first stop arrangement being arranged on the main shaft section; the eccentric bushing (130) comprises a main body part and a counterweight part, the counterweight part is arranged on the main body part, the counterweight part is provided with the second limiting structure, and the eccentric shaft section is arranged on the main body part in a penetrating mode.

10. A compressor, characterized in that it comprises an eccentric adjustment structure, which is as claimed in any one of claims 1 to 9.