CN110319016B

CN110319016B - Axial limiting assembly, scroll compressor and air conditioner

Info

Publication number: CN110319016B
Application number: CN201910599064.0A
Authority: CN
Inventors: 胡余生; 陈肖汕; 康小丽; 刘韵; 李雪峰; 张俊杰; 陈江嘉
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2021-08-17
Anticipated expiration: 2039-07-04
Also published as: CN110319016A

Abstract

The invention provides an axial limiting assembly, a scroll compressor and an air conditioner. This spacing subassembly of axial, including pivot and spacing retaining ring, spacing retaining ring is used for the restriction the axial displacement of moving part in the pivot, spacing retaining ring includes the annular body, be equipped with joint portion on the internal perisporium of annular body, joint portion is used for the restriction spacing retaining ring is in epaxial axial displacement rotates. Under the condition that the space is limited, the moving part is prevented from axially moving on the rotating shaft on the basis of not changing the size of the original space structure.

Description

Axial limiting assembly, scroll compressor and air conditioner

Technical Field

The invention belongs to the technical field of scroll compressors, and particularly relates to an axial limiting assembly, a scroll compressor and an air conditioner.

Background

The operation of the scroll compressor needs to be driven by a crankshaft, and the crankshaft is provided with parts such as a bearing, a rotor, a balance block or a shaft sleeve, and the parts are assembled together to form a shaft system. Some parts on the shaft system need to be fixed in an interference mode (such as a rotor, a balance block, a bearing and the like), some parts can move in a clearance fit mode (such as a shaft sleeve), the design of axial safe size needs to be considered for the movable parts, otherwise, the problems of part moving collision interference and the like can occur in the operation of a prototype machine, and the operation stability of the pump body is influenced. In order to effectively limit the axial movement of the part, a shaft shoulder limiting structure or a check ring structure can be designed on the shaft.

Adopt the circlip card for the axle to carry out the axial spacing to the bent axle sleeve on the outer groove of pivot, prevent that the axle sleeve drunkenness from bumping with driving disk or cross sliding ring, avoiding taking place unnecessary interference problem. However, the installation space of the circlip for the shaft is limited, or when the dimension of the expanded outer profile of the snap spring is larger than the dimension of the outer diameter of the shaft sleeve or the inner diameter of the bearing during assembly, the shaft sleeve interferes with the bearing when being assembled in the bearing of the movable disc hub part, and the problem that the circlip cannot be installed is caused. At the moment, the radial size of the retainer ring or the external expansion size during assembly is required by adopting the external clamping type retainer ring on the shaft and cannot exceed the size of the inner ring of the bearing, otherwise, the assembly and the use are not satisfied. The external snap-in securing ring thus requires a sufficiently large space in the radial direction for assembly. If to radial dimension or when the structural space is limited can not satisfy the assembly space demand, just can not adopt outer card formula retaining ring to carry out axial spacing, for example the installation clamping hole place outline size of two first bulges of outer card formula retaining ring jump ring is great for the axle, and the space that current structure given the retaining ring installation is limited, unsatisfied setting of outer card retaining ring. At the moment, the axial space size and the radial space size of a bearing hole of the hub at the tail part of the movable disc need to be increased to meet the requirements of setting and installing the clamp spring, so that the axial and radial size structures of a prototype are increased, and the small compact design of the compressor is not easy to realize.

The size to the eccentric configuration of drive division axle sleeve is different, and retaining ring installation space structure is narrow and small when the eccentricity value is big more, and retaining ring outline can take place to interfere with parts on every side in above-mentioned technique.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide an axial limiting assembly, a scroll compressor and an air conditioner, which can prevent the component on the rotating shaft from moving without changing the original space structure size.

In order to solve the problems, the invention provides an axial limiting assembly which comprises a rotating shaft and a limiting retainer ring, wherein the limiting retainer ring is used for limiting the axial movement of a moving part on the rotating shaft, the limiting retainer ring comprises an annular body, a clamping part is arranged on the inner peripheral wall of the annular body, and the clamping part is used for limiting the axial movement of the limiting retainer ring on the rotating shaft.

Preferably, the clamping portion is provided with a plurality of evenly distributed clamping portions.

Preferably, the clamping portion includes a cantilever structure.

Preferably, a limiting groove is formed in the rotating shaft, and the cantilever end of the cantilever structure is embedded into the limiting groove.

Preferably, the limiting groove is an annular groove, the annular groove is formed in the outer peripheral wall of the rotating shaft, and the rotating shaft is sleeved with the annular body.

Preferably, the side surface of the annular groove facing the annular body is provided with a conical surface.

Preferably, the cantilever structure comprises a bent tooth.

Preferably, the bending teeth are bent towards the annular groove.

According to another aspect of the present invention there is provided a scroll compressor including an axial stop assembly as described above.

Preferably, the shaft sleeve of the scroll compressor comprises a first shaft section and a second shaft section which are connected in the axial direction, and the inner diameter of the first shaft section is smaller than that of the second shaft section so as to form a step surface at the joint of the inner walls of the first shaft section and the second shaft section, and part of the limit retainer ring is rested on the step surface.

Preferably, the step surface is made of wear-resistant or wear-reducing materials or subjected to wear-resistant and wear-reducing heat treatment; and/or part of the limiting retainer ring placed on the step surface is made of wear-resistant or wear-reducing materials or is subjected to wear-resistant and wear-reducing heat treatment with the contact surface of the step surface.

According to still another aspect of the present invention, there is provided an air conditioner including the scroll compressor as described above.

The invention provides an axial limiting assembly which comprises a rotating shaft and a limiting retainer ring, wherein the limiting retainer ring is used for limiting the axial movement of a moving part on the rotating shaft, the limiting retainer ring comprises an annular body, a clamping part is arranged on the inner peripheral wall of the annular body, and the clamping part is used for limiting the axial movement of the limiting retainer ring on the rotating shaft. Under the condition that the space is limited, the moving part is prevented from axially moving on the rotating shaft on the basis of not changing the size of the original space structure.

Drawings

FIG. 1 is an assembled view of an axial stop assembly according to a first embodiment of the present invention;

FIG. 2 is a top view of the axial stop assembly of the first embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of the axial stop assembly of the first embodiment of the present invention;

FIG. 4 is an exploded view of the axial stop assembly of the first embodiment of the present invention in use;

FIG. 5 is an enlarged view of a retention ring of the axial retention assembly of the first embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of the shaft of the axial stop assembly according to the first embodiment of the present invention;

FIG. 7 is a partial schematic view of the resilient member of the axial stop assembly of the first embodiment of the present invention assembled under a force to deform at A in FIG. 3;

FIG. 8 is a partial schematic view of the elastic member of the axial stop assembly of the first embodiment of the present invention assembled at A in FIG. 3 after the elastic member is deformed and restored;

FIG. 9 is an exploded view of an axial stop assembly according to a second embodiment of the present invention;

FIG. 10 is a schematic view of an assembly process of an axial stop assembly according to a second embodiment of the present invention;

FIG. 11 is a block diagram of an axial retainer ring of the axial stop assembly of the second embodiment of the present invention;

FIG. 12 is a partial cross-sectional view of an axial stop assembly according to a second embodiment of the present invention;

FIG. 13 is an enlarged view of a portion of the shaft of the axial restraining assembly according to the second embodiment of the present invention.

The reference numerals are represented as:

1. a crank pin shaft; 2. a support; 3. a movable disc bearing; 4. a cross slip ring; 5. a movable scroll; 6. a shaft sleeve; 7. a rotating shaft; 8. a limit retainer ring; 711. a first projecting portion; 712. a first notch; 713. a first groove; 714. an annular portion; 715. a tapered ring groove; 811. an annular body; 812. a second projection; 813. a clamping part; F. pressing force; f1, sidewall force.

Detailed Description

Referring to fig. 1 to 13 in combination, according to an embodiment of the present invention, an axial limiting assembly includes a rotating shaft 7 and a limiting retainer ring 8, where the limiting retainer ring 8 is used to limit axial movement of a movable member on the rotating shaft 7, the limiting retainer ring 8 includes an annular body 811, an inner peripheral wall of the annular body 811 is provided with a clamping portion 813, and the clamping portion 813 is used to limit axial movement of the limiting retainer ring 8 on the rotating shaft 7.

According to the invention, the limiting retainer ring 8 is arranged as the annular body 811 which is of an annular structure, the clamping part 813 is arranged on the inner peripheral wall of the annular body 811, so that the limiting retainer ring 8 can be conveniently clamped with the rotating shaft 7, and further, the axial limiting effect is carried out on the limiting retainer ring 8, so that the assembly or disassembly is easy under the condition that the structural space is limited, and the problem of play interference of parts on the shaft can be solved.

The main body of the limiting retainer ring 8 is annular, has stable structure and is not easy to deform; because the spacing retaining ring 8 joint is on pivot 7, add the processing and refer to pivot 7 size and can accomplish, control is convenient, like this and pivot 7 between the assembly comparatively easy.

Preferably, the clamping portion 813 is provided with a plurality of evenly distributed. Set up a plurality of joint portions 813 on spacing retaining ring 8, improve the stability of spacing retaining ring 8 and pivot 7, just so can limit the drunkenness of moving part on the pivot 7 through spacing retaining ring 8.

Preferably, the clamping portion 813 includes a cantilever structure. Through cantilever structure, can take place to a certain extent deformation, have the elastic capacity that the atress extrusion takes place bending deformation and self resumes former shape for convenient assembly between spacing retaining ring 8 and pivot 7. Meanwhile, the assembled limiting retainer ring 8 can be subjected to the reaction force exerted by the bending structure; in addition, the limit retainer ring 8 is convenient to disassemble.

Preferably, the rotating shaft 7 is provided with a limiting groove, and the cantilever end of the cantilever structure is embedded into the limiting groove. Through the spacing recess on the pivot 7, combine cantilever end embedding this spacing recess for the assembly is accurate, and stable in structure can not produce the motion interference problem between spacing retaining ring 8 and the pivot 7.

Example 1, as shown in fig. 1-8, preferably,

the rotating shaft 7 comprises a rotating shaft 7 body and more than two first protruding parts 711 which are arranged on the axial end face of the rotating shaft 7 body and extend out along the axial direction; the limit groove is formed on the inner wall of the first protrusion 711; the annular body 811 is tightly attached to the axial end face of the rotating shaft 7 body, and the cantilever structure is arranged on the peripheral wall of the annular body 811.

The axial limiting assembly is in a structural form of embodiment 1 of the axial limiting assembly, the plurality of first protruding portions 711 are arranged on the axial end face of the rotating shaft 7, so that the annular body 811 of the limiting retainer ring 8 can be sunk in positions among the plurality of first protruding portions 711, and the clamping portion 813 is arranged on the outer peripheral wall of the annular body 811 and can be further in embedded clamping with the limiting groove on the inner wall of the first protruding portions 711.

Specifically, a first gap 712 is formed between two adjacent first protrusions 711, and a plurality of second protrusions 812 are further disposed on the outer peripheral wall of the annular body 811 and spaced from the plurality of clamping portions 813; the second protrusion 812 extends outward along the radial direction of the annular body 811, and can extend out of the outer periphery of the rotating shaft 7 from the first notch 712, so as to limit the axial movement of the movable member on the rotating shaft 7.

This is a further preferable structural form of the rotating shaft 7 and the limit stop ring 8 in embodiment 1 of the present invention, that is, the rotating shaft 7 is provided with the first protruding portion 711 extending axially and the first notch 712 formed between the adjacent first protruding portions 711, and the limit stop ring 8 is provided with the annular body 811 and the second protruding portion 812, so that the second protruding portion 812 of the limit stop ring 8 can extend into the position of the first notch 712 to further extend out of the outer periphery of the rotating shaft 7 for axial limit, which is simple in structural form and convenient to machine, and is beneficial to axially limiting the shaft sleeve 6 without occupying space.

The limiting groove is formed on the radial inner wall of the first protrusion 711, such as the first groove 713 shown in fig. 6, and extends along the circumferential direction, and the cantilever end of the cantilever structure can be elastically clamped into the first groove 713. The further preferable structural form between the limit retainer ring 8 and the rotating shaft 7 in embodiment 1 of the present invention is that a groove is formed on the radial inner wall of the first protruding portion 711, and the groove can be in snap fit with the limit retainer ring 8, and the snap portion 813 is snapped into the groove to axially limit the limit retainer ring 8 and prevent the limit retainer ring 8 from coming off in the axial direction, and the second protruding portion 812 on the limit retainer ring 8 can finally achieve the axial limit effect on the shaft sleeve 6, and save space.

The crank pin is provided with the counter bore for accommodating the annular body 811, the first protruding part 711 and the groove for the inner clamp are circumferentially arranged on the counter bore, the clamping part 813 with limiting performance is adopted, and the axial limiting structure of the second protruding part 812 extending out of the outer periphery of the rotating shaft 7 is combined, so that the problem of play interference of parts on the shaft can be solved under the condition of limited structural space, and the stable running performance of the movable scroll plate 5 is improved.

Specifically, the first protrusions 711 are three in number and the first notches 712 are also three and are respectively formed between two adjacent first protrusions 711, and the first grooves 713 are also three and are respectively formed on the radial inner wall of each first protrusion 711. As shown in fig. 5 to 6, three first protrusions 711, three first notches 712 and three first grooves 713 are distributed in the circumferential direction, so that the three second protrusions 812 of the position-limiting retainer ring 8 extend into the shaft sleeve 6 to form three axial position-limiting effects, thereby improving the position-limiting effect.

Preferably, the cantilever end is bent towards the limiting groove. The direction of adopting to buckle is towards spacing recess for after spacing retaining ring 8 assembled, when annular body 811 left pivot 7 terminal surface, the cantilever end can be to annular body 811's production axial effort, prevents 7 motion of pivot in the drop of spacing retaining ring 8.

During assembly, as shown in fig. 7 and 8, under the combined action of the press-fitting force F and the sidewall force F1, the bent cantilever structure is forced to slightly bend toward the center so that the cantilever end can smoothly enter the groove. The cantilever end after the atress warp has self resilience force, and under the effect of this resilience force, the cantilever end resumes original state, just tightly blocks in the recess, relies on the mechanical tight power that expands of cantilever end to realize fixed spacing promptly, does not loosen and takes off safe and reliable.

Example 2, as shown in FIGS. 9 to 13

Preferably, the limiting groove is an annular groove, and the annular groove is arranged on the outer peripheral wall of the rotating shaft 7 and is coaxial with the rotating shaft 7; the rotating shaft 7 is sleeved on the annular body 811, and the cantilever structure is arranged on the inner peripheral wall of the annular body 811.

The axial limiting assembly is in a structural form of embodiment 2 of the axial limiting assembly, namely, the structural form of the limiting retainer ring 8 is adjusted, the clamping portion 813 is arranged on the inner side wall of the annular body 811, the groove is arranged on the outer side wall of the rotating shaft 7, the clamping portion 813 is clamped with the annular groove towards the rotating shaft 7, the axial limiting of the limiting retainer ring 8 on the rotating shaft 7 is achieved, and the space is compact.

Preferably, the side of the annular groove facing the annular body 811 is provided with a tapered surface.

Because the pivot 7 is established to spacing retaining ring 8 cover, annular body 811 is located the pivot 7 periphery promptly, can carry out axial spacing to the moving part on the pivot 7.

Preferably, cantilever structure includes the tooth of bending, adopts the annular groove matching joint on dentate structure and the 7 periphery walls of pivot, utilizes the tooth of bending to be cantilever structure, can take place deformation to a certain extent, has the elastic capacity that the atress extrusion takes place bending deformation and self resumes former shape for convenient assembly between spacing retaining ring 8 and the pivot 7. Meanwhile, the assembled limiting retainer ring 8 can be subjected to the reaction force exerted by the bending teeth and is not easy to fall off from the rotating shaft 7. When the limit check ring 8 is damaged, the limit check ring 8 is convenient to disassemble and replace.

Preferably, the bending teeth are bent towards the annular groove. Adopt and buckle towards annular groove direction for spacing retaining ring 8 assembles the back, and when annular body 811 moved to this 7 terminal surfaces of pivot, the tooth that bends can be to annular body 811's the axial effort of production, prevents 7 movements of pivot 8 in the drop of spacing retaining ring.

During assembly, as shown in fig. 10, under the action of the press-fitting force F, the limit retainer ring 8 moves gradually towards the tapered ring groove 715 along the outer cylindrical surface of the annular portion 714 at the end of the rotating shaft 7, and simultaneously, under the action of an outward pressing force F1 exerted by the outer cylindrical surface of the annular portion 714, the bending teeth are stressed and then slightly bent and deformed from the center to the outside, so that the bending teeth can smoothly enter the tapered ring groove 715. After the bending teeth enter the tapered ring groove 715, the bending teeth are not squeezed by the annular part 714 and are restored to deform, at the moment, the inner diameter of the bending teeth is smaller than the outer diameter of the rotating shaft 7, and the tooth ends of the bending teeth are attached to the end part of the annular part 714 and limited on the rotating shaft 7. At this time, the annular body 811 of the limit retainer ring 8 can limit the play of the shaft sleeve 6 on the rotating shaft 7.

According to the axial limiting assembly in the embodiment 2 of the invention, the bending teeth of the limiting retainer ring 8 deform to realize fixed limiting by means of mechanical expansion force, and the axial limiting assembly is safe and reliable and does not loosen.

The invention also provides a scroll compressor, which comprises the axial limiting assembly, a crank pin shaft 1, a bracket 2, a movable disc bearing 3, a cross sliding ring 4, a movable scroll disc 5 and a shaft sleeve 6; the rotating shaft 7 is connected to the crank pin shaft 1, and the shaft sleeve 6 is sleeved on the rotating shaft 7.

Preferably, the shaft sleeve 6 comprises a first shaft section and a second shaft section which are connected in the axial direction, the inner diameter of the first shaft section is smaller than that of the second shaft section so as to form a step surface at the joint of the inner walls of the first shaft section and the second shaft section, and part of the limit retainer ring 8 is rested on the step surface.

The inner periphery of the shaft sleeve 6 is set to be of a structure with a step surface, a limiting retainer ring 8 is arranged, the inner periphery of the shaft sleeve 6 is arranged at the step surface in the shaft sleeve 6 through the limiting retainer ring 8, the limiting retainer ring 8 and the rotating shaft 7 are in axial limiting fit, axial limiting can be formed on the limiting retainer ring 8 through the rotating shaft 7, the shaft sleeve 6 is further limited and positioned along the axial direction through the step surface of the shaft sleeve 6 matched with the limiting retainer ring 8, the axial float of the shaft sleeve 6 can be effectively prevented under the condition that the internal structure space of the compressor is limited, the problem of float interference of parts on the shaft is solved, and the stable operation performance of the movable scroll plate 5 is improved.

Preferably, the step surface is made of wear-resistant or wear-reducing materials or subjected to wear-resistant and wear-reducing heat treatment; and/or, part of the limiting retainer ring 8 which is placed on the step surface is made of wear-resistant or wear-reducing materials or is subjected to wear-resistant and wear-reducing heat treatment with the contact surface of the step surface.

By adopting wear-resistant and wear-reducing materials or heat treatment of the contact surface, the friction and the wear generated by the upward-fleeing rotary contact of parts can be effectively reduced, and the performance of the compressor is further improved.

The invention also provides an air conditioner comprising the scroll compressor.

It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An axial limiting assembly comprises a rotating shaft (7) and a limiting retainer ring (8), wherein the limiting retainer ring (8) is used for limiting the axial movement of a movable member on the rotating shaft (7), and is characterized in that the limiting retainer ring (8) comprises an annular body (811), a second protruding portion (812) and a clamping portion (813) are arranged on the outer peripheral wall of the annular body (811), and the clamping portion (813) is used for limiting the axial movement of the limiting retainer ring (8) on the rotating shaft (7);

a limiting groove is formed in the rotating shaft (7), the clamping part (813) is of a cantilever structure, and the cantilever end of the clamping part is embedded into the limiting groove;

the axial end face of the rotating shaft (7) is provided with more than two first protruding parts (711) which extend out along the axial direction of the rotating shaft, a first notch (712) is formed between every two adjacent first protruding parts (711), and the second protruding part (812) extends out of the outer periphery of the rotating shaft (7) through the first notch (712); the limiting groove is formed in the inner wall of the first protruding portion (711), and the annular body (811) is tightly attached to the axial end face of the rotating shaft (7).

2. Axial stop assembly according to claim 1, characterized in that said snap-in portion (813) is provided with a number that is evenly distributed.

3. The axial stop assembly of claim 1, wherein the cantilevered structure comprises a bent tooth.

4. The axial stop assembly of claim 3, wherein the angled teeth are angled toward the stop groove.

5. A scroll compressor including an axial stop assembly according to any one of claims 1 to 4.

6. The scroll compressor of claim 5, wherein the scroll compressor shaft sleeve (6) comprises first and second shaft segments joined in an axial direction, and wherein the first shaft segment has an inner diameter smaller than an inner diameter of the second shaft segment to form a step surface where inner walls of the first and second shaft segments meet, a portion of the limit stop ring (8) resting on the step surface.

7. The scroll compressor of claim 6, wherein the step face is made of a wear resistant or wear reducing material or is subjected to a wear resistant and wear reducing heat treatment; and/or the part of the limiting retainer ring (8) which is placed on the step surface is made of wear-resistant or wear-reducing materials or is subjected to wear-resistant and wear-reducing heat treatment with the contact surface of the step surface.

8. An air conditioner including a scroll compressor as claimed in any one of claims 5 to 7.