Thrust bearing structure for scroll compressor and scroll compressor

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a thrust bearing structure for a scroll compressor and the scroll compressor, the thrust bearing structure for the scroll compressor comprises a supporting body and a shell installed on the compressor, and a first through hole is formed in the middle of the supporting body; the thrust bearing is arranged on a driving shaft of the compressor in a sleeving mode, the thrust bearing comprises a bearing main body and an edge folding part, the edge folding part is formed at the top of the bearing main body, the bearing main body is installed in the first through hole, and the edge folding part is erected on the top face of the supporting body and used for bearing the driving shaft; and an oil groove is formed in the edge folding part. By means of the thrust bearing structure for the scroll compressor and the scroll compressor, the problem that an existing thrust bearing for the scroll compressor is complex in machining or prone to abrasion can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressors, and particularly to a thrust bearing structure for a scroll compressor and the scroll compressor. BACKGROUND

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size and smooth operation. In a vertical scroll compressor, the rotational movement of the crankshaft assembly is usually constrained by the middle and lower bearings and the thrust bearing. The main function of the thrust bearing is to bear the downward axial force of the crankshaft and the running parts on the crankshaft. The existing thrust bearing and middle and lower bearings are a split structure, and the thrust bearing can be arranged above or below the middle and lower bearings.

[0003] Most existing thrust bearings only rely on bosses and / or positioning ear plates for circumferential limiting. This design may cause the thrust bearing to move circumferentially during the start, stop or variable speed process of the compressor, thereby accelerating wear and shortening the service life. In a small number of compressors, the thrust bearing is fixed to the rack by bolts, but this fixing method increases the complexity of forming processing, requires high assembly, and thus increases the overall cost of the compressor. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a thrust bearing structure for a scroll compressor and a scroll compressor to solve the problems of complex processing or easy wear of the existing thrust bearing for a scroll compressor.

[0005] According to the first aspect of the present application, a thrust bearing structure for a scroll compressor is provided, wherein the thrust bearing structure for the scroll compressor comprises: a support body mounted to a housing of the compressor, a middle part of the support body being provided with a first through hole; and a thrust bearing sleeved on a drive shaft of the compressor, the thrust bearing comprising a bearing body and a folded edge part, the folded edge part being formed at a top of the bearing body, the bearing body being mounted in the first through hole, the folded edge part being arranged on a top surface of the support body for bearing the drive shaft, and an oil groove being arranged on the folded edge part.

[0006] Preferably, the support body comprises a support main body, an outer periphery of the support main body being connected with an inner wall of the housing, and an annular protruding part being arranged in a middle part of the support main body, the first through hole being formed in the annular protruding part, and a bottom surface of the folded edge part of the thrust bearing being fitted to a top surface of the annular protruding part.

[0007] Preferably, the bearing body is in interference fit with the annular protruding part.

[0008] Preferably, the folded edge portion is annular, the plate surface of the folded edge portion is perpendicular to the axial direction of the bearing body, and the inner periphery of the folded edge portion is connected to the top end of the bearing body.

[0009] Preferably, the oil groove is arranged on the top surface of the folded edge portion and is arranged along the radial direction of the folded edge portion.

[0010] Preferably, the oil groove is arranged on the top surface of the folded edge portion and is arranged along the radial direction of the folded edge portion.

[0011] Preferably, the depth of the oil groove is 1 / 4 to 1 / 5 of the thickness of the folded edge portion.

[0012] According to the second aspect of the present application, a scroll compressor is provided, wherein the scroll compressor comprises a driving shaft, a housing, and a thrust bearing structure for a scroll compressor as described above, the thrust bearing structure for a scroll compressor is mounted to the inner wall of the housing, and the driving shaft is arranged in the thrust bearing structure for a scroll compressor.

[0013] Preferably, the thrust bearing structure for a scroll compressor is arranged at the lower part of the driving shaft, the thrust bearing is a lower bearing of the scroll compressor, and the scroll compressor further comprises an annular thrust block, the thrust block is sleeved on the driving shaft, the lower part of the driving shaft is formed with a first protruding edge, the top surface of the thrust block abuts against the first protruding edge, and the bottom surface of the thrust block abuts against the folded edge portion of the lower bearing.

[0014] Preferably, the thrust bearing structure for a scroll compressor is arranged at the middle part of the driving shaft, the thrust bearing is a middle bearing of the scroll compressor, and the middle part of the driving shaft is formed with an annular second protruding edge, and the bottom surface of the second protruding edge abuts against the folded edge portion of the middle bearing.

[0015] The thrust bearing structure for a scroll compressor and the scroll compressor of the present application have the following advantages: the support body is mounted to the housing of the compressor, the first through hole is arranged at the middle part of the support body, the thrust bearing is sleeved on the driving shaft of the compressor and is mounted in the first through hole, the folded edge portion of the thrust bearing is arranged on the top surface of the support body and is used for bearing the driving shaft, and the oil groove is arranged on the folded edge portion. In this way, the thrust bearing does not need to be connected to the support body by bolts, thereby reducing the processing difficulty and facilitating installation. The lubricating oil in the oil groove can lubricate the contact surface of the folded edge portion, thereby reducing the friction and removing the heat generated by the friction of the folded edge portion. In this way, the problem of complex processing or easy wear of the existing thrust bearing for a scroll compressor can be effectively solved.

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of one embodiment of the scroll compressor according to the present invention.

[0019] Figure 2 This is a schematic diagram of the thrust bearing structure for a scroll compressor according to this utility model.

[0020] Figure 3 This is a schematic diagram of the thrust bearing according to this utility model.

[0021] Figure 4 This is a schematic diagram of a partial structure of another embodiment of the scroll compressor according to the present invention.

[0022] Reference numerals: 1-Support body; 10-First through hole; 11-Support body; 12-Annular protrusion; 101-Lower support body; 102-Middle support body; 2-Thrust bearing; 21-Bearing body; 22-Folded edge; 23-Oil groove; 201-Lower bearing; 202-Middle bearing; 3-Scroll compressor; 30-Housing shell; 31-Drive shaft; 311-First protrusion; 312-Second protrusion; 32-Thrust block. Detailed Implementation

[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.

[0026] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0027] Although terms such as "first" and "second" and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, the first component, assembly, region, layer or section described in the examples described herein could also be termed a second component, assembly, region, layer or section, without departing from the teachings of the examples.

[0028] For ease of description, spatial relationship terms, such as "on", "upper", "beneath", and "lower", can be used herein to describe the orientation of one element relative to another element as illustrated in the figures. Such spatial relationship terms can be intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, a component described as relative to another component on the "upper" side of another component would then be oriented on the "lower" side of that component. Accordingly, the term "on" encompasses both an "on" and "under" orientation depending on the spatial orientation of the device. The device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and an appropriate modification to the spatial relationship terminology would be made to accommodate those orientations.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has," "having" as used herein, are intended to be open-ended terms that specify the presence of the stated features, integers, operations, components, elements, and / or the like, but do not preclude the presence or addition of one or more other features, integers, operations, components, elements, and / or the like.

[0030] Variations in the shapes illustrated in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include variations in shapes that occur during manufacturing.

[0031] Features of the examples described herein can be combined with one another as would be apparent to one of ordinary skill in the art after understanding the disclosure provided herein. Furthermore, although examples described herein have a variety of configurations, other configurations are possible in which are apparent after understanding the disclosure provided herein.

[0032] As Figures 1 to 4 According to a first aspect of the present application, a thrust bearing structure for a scroll compressor is provided, which includes a support body 1 and a thrust bearing 2.

[0033] In the following description, reference is made to the Figures 1 to 4 The specific structure of the above components of the thrust bearing structure for a scroll compressor and the connection relationship of the above components are specifically described.

[0034] As Figures 1 to 4As shown in the embodiments, the thrust bearing 2 and the support body 1 can be arranged inside a housing 30 of a scroll compressor 3, and the thrust bearing 2 is mounted on the support body 1. A drive shaft 31 of the scroll compressor 3 can pass through the thrust bearing 2 and the support body 1, and the scroll compressor thrust bearing structure is used to bear the axial force applied downward by the drive shaft 31. Specifically, the support body 1 can be fixed to the housing 30, and a first through hole 10 is arranged in the middle of the support body 1. The thrust bearing 2 can be sleeved on the drive shaft 31 of the compressor. The thrust bearing 2 can include a bearing body 21 and a folded edge portion 22. The folded edge portion 22 can be formed at the top of the bearing body 21, and the bearing body 21 can be mounted in the first through hole 10. The folded edge portion 22 can be arranged on the top surface of the support body 1 and used to bear the drive shaft 31. An oil groove 23 can be arranged on the folded edge portion 22. In this way, the thrust bearing 2 does not need to be connected to the support body 1 by bolts, thereby reducing the processing difficulty and facilitating installation. The lubricating oil in the oil groove 23 can lubricate the contact surface of the folded edge portion 22 to reduce friction, and the lubricating oil can also take away the heat generated by the folded edge portion 22 during friction, thereby improving the service life of the scroll compressor thrust bearing structure.

[0035] Preferably, as shown in the embodiments, Figure 1 and Figure 2 As shown in the embodiments, the support body 1 can include a support body 11 and an annular protruding portion 12. The support body 11 is used to connect with the housing 30. The support body 11 can be integrally formed with the annular protruding portion 12. The support body 11 can be formed with a horizontally arranged plate portion, and the drive shaft 31 passes through the plate portion. The outer periphery of the plate portion can be partially welded to the inner wall of the housing 30, thereby fixedly connecting the support body 11 to the inner wall of the housing 30. The annular protruding portion 12 can be arranged in the middle of the support body 11, and the extension direction of the annular protruding portion 12 is perpendicular to the plate surface of the plate portion. The first through hole 10 is formed inside the annular protruding portion 12 (the first through hole 10 penetrates the support body 11 and the annular protruding portion 12 in the vertical direction), so that the drive shaft 31 can pass through the first through hole 10 and be arranged in the support body 1.

[0036] Preferably, as shown in the embodiments, Figures 1 to 3 The thrust bearing 2 can be sleeved on the drive shaft 31, and the thrust bearing 2 is mounted on the support body 1. The bearing body 21 of the thrust bearing 2 can be a cylindrical tubular structure. The bearing body 21 can be inserted into the first through hole 10. The folded edge portion 22 can be an annular plate structure, and the plate surface of the folded edge portion 22 is perpendicular to the axial direction of the bearing body 21. The inner periphery of the folded edge portion 22 can be connected with the top end of the bearing body 21, and a chamfer is arranged at the connection between the folded edge portion 22 and the bearing body 21. Preferably, the folded edge portion 22 can be integrally formed with the bearing body 21.

[0037] Further optimized, such as Figures 1 to 3 As shown, in this embodiment, the oil groove 23 can be disposed on the top surface of the folded edge 22. Specifically, the oil groove 23 can be a rectangular groove. The oil groove 23 can be disposed radially along the folded edge 22. Preferably, there can be multiple oil grooves 23, which can be evenly distributed circumferentially on the top surface of the folded edge 22. This arrangement allows the lubricating oil to be distributed more evenly on the top surface of the folded edge 22. Further, preferably, the depth of the oil groove 23 can be 1 / 4 to 1 / 5 of the thickness of the folded edge 22, so that the oil groove 23 can store enough lubricating oil without affecting the structural strength of the folded edge 22.

[0038] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the bottom surface of the folded edge 22 of the thrust bearing 2 can be fitted against the top surface of the annular protrusion 12 (i.e., the upper end surface of the annular protrusion 12), so that the support body 1 can limit the thrust bearing 2 axially. The bearing body 21 can be interference-fitted with the annular protrusion 12 (i.e., the bearing body 21 is interference-fitted with the first through hole 10), so that the support body 1 can limit the thrust bearing 2 radially and circumferentially.

[0039] In addition, such as Figure 1 and Figure 4 As shown, according to a second aspect of the present invention, a scroll compressor 3 is provided, the scroll compressor 3 including a drive shaft 31, a housing 30, and a thrust bearing structure for a scroll compressor as described above. The thrust bearing structure for a scroll compressor can be welded to the inner wall of the housing 30, and the drive shaft 31 passes through the thrust bearing structure for a scroll compressor, the thrust bearing structure for a scroll compressor being able to support the drive shaft 31 in the axial direction.

[0040] Preferably, in such Figure 1In the illustrated embodiment, the scroll compressor thrust bearing structure can be arranged at the lower portion of the drive shaft 31. In this case, the thrust bearing can be a lower bearing 201 of the scroll compressor 3, and the support body can be a lower support body 101. The lower support body 101 can be connected to the lower portion of the inner wall of the shell 30. The scroll compressor 3 can further include an annular thrust block 32, which is sleeved on the lower portion of the drive shaft 31. An annular first protrusion 311 can be formed on the lower portion of the drive shaft 31, the top surface of the thrust block 32 can abut against the first protrusion 311, and the bottom surface of the thrust block 32 can abut against the folded edge portion 22 of the lower bearing 201. At this time, the scroll compressor thrust bearing structure supports the drive shaft 31 in the axial direction through the thrust block 32. Further, preferably, the hardness of the thrust block 32 can be 45HRC to 65HRC, so as to further reduce the wear of the lower bearing 201.

[0041] In addition, preferably, in the scroll compressor thrust bearing structure as described above, Figure 4 In the illustrated embodiment, the scroll compressor thrust bearing structure can be arranged at the middle portion of the drive shaft 31. In this case, the thrust bearing can be a middle bearing 202 of the scroll compressor 3, and the support body can be a middle support body 102. The middle support body 102 can be connected to the upper portion of the inner wall of the shell 30. An annular second protrusion 312 can be formed on the middle portion of the drive shaft 31, and the bottom surface of the second protrusion 312 can abut against the folded edge portion 22 of the middle bearing 202. At this time, the scroll compressor thrust bearing structure supports the drive shaft 31 in the axial direction through the second protrusion 312.

[0042] In use, the scroll compressor thrust bearing structure integrates the bearing body 21 and the folded edge portion 22, thereby avoiding the use of bolts for connection, reducing the processing difficulty and being easy to install. The lubricating oil in the oil groove 23 can lubricate the contact surface of the folded edge portion 22 to reduce the friction, and the lubricating oil can also take away the heat generated by the folded edge portion 22 during friction, thereby improving the service life of the scroll compressor thrust bearing structure.

[0043] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any skilled person in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A thrust bearing structure for a scroll compressor, disposed in a scroll compressor, characterized in that, The thrust bearing structure for the scroll compressor comprises: a support body mounted to a housing of the compressor, a middle portion of the support body being provided with a first through hole; and a thrust bearing sleeved on a drive shaft of the compressor, the thrust bearing comprising a bearing body and a folded edge portion formed on a top portion of the bearing body, the bearing body being mounted in the first through hole, the folded edge portion being arranged on a top surface of the support body for bearing the drive shaft, and an oil groove being provided on the folded edge portion.

2. The thrust bearing structure for a scroll compressor according to claim 1, characterized in that, The support body comprises: a support body, an outer periphery of the support body being connected with an inner wall of the housing; and an annular protruding portion provided in a middle portion of the support body, the first through hole being formed in the annular protruding portion, and a bottom surface of the folded edge portion of the thrust bearing being fitted to a top surface of the annular protruding portion.

3. The thrust bearing structure for a scroll compressor according to claim 2, wherein The bearing body is in interference fit with the annular protruding portion.

4. The thrust bearing structure for a scroll compressor according to claim 1, wherein The folded edge portion is annular, a plate surface of the folded edge portion being perpendicular to an axial direction of the bearing body, and an inner periphery of the folded edge portion being connected with a top end of the bearing body.

5. The thrust bearing structure for a scroll compressor according to claim 4, wherein The oil groove is provided on a top surface of the folded edge portion, and the oil groove is arranged along a radial direction of the folded edge portion.

6. The thrust bearing structure for a scroll compressor according to claim 5, wherein The oil groove is provided on a top surface of the folded edge portion, and the oil groove is arranged along a radial direction of the folded edge portion.

7. The thrust bearing structure for a scroll compressor according to claim 4, wherein The oil groove is provided on a top surface of the folded edge portion, and the oil groove is arranged along a radial direction of the folded edge portion.

8. A scroll compressor characterized by, The oil groove is provided on a top surface of the folded edge portion, and the oil groove is arranged along a radial direction of the folded edge portion.

9. The scroll compressor of claim 8, wherein, The scroll compressor comprises a drive shaft, a housing, and the thrust bearing structure for the scroll compressor according to any one of claims 1 to 7, the thrust bearing structure for the scroll compressor being mounted to an inner wall of the housing, and the drive shaft being arranged through the thrust bearing structure for the scroll compressor.

10. The scroll compressor of claim 8, wherein, The thrust bearing structure for the scroll compressor is arranged at a lower portion of the drive shaft, the thrust bearing being a lower bearing of the scroll compressor, and the scroll compressor further comprises an annular thrust block sleeved on the drive shaft, a first protruding edge being formed on the lower portion of the drive shaft, a top surface of the thrust block being abutted against the first protruding edge, and a bottom surface of the thrust block being abutted against the folded edge portion of the lower bearing. The thrust bearing structure for the scroll compressor is arranged at a middle portion of the drive shaft, the thrust bearing being a middle bearing of the scroll compressor, and the middle portion of the drive shaft is provided with an annular second protruding edge, a bottom surface of the second protruding edge being abutted against the folded edge portion of the middle bearing.

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