A flexible scroll compressor

Abstract

The present application provides a flexible scroll compressor, including a frame, a fixed plate, a moving plate and a main shaft, wherein the frame is provided with a first bearing hole; the fixed plate includes a fixed plate body and a fixed plate scroll tooth arranged in the middle of the fixed plate body, and the frame is fixedly connected to the end of the fixed plate body; the moving plate structure includes a moving plate scroll tooth and a moving plate bottom plate, wherein the moving plate scroll tooth is located on the front of the moving plate bottom plate, the fixed plate scroll tooth meshes with the moving plate scroll tooth to form a compression chamber, and an elastomer mounting hole is provided in the middle of the back of the moving plate bottom plate, and the elastomer mounting hole is a blind hole; an eccentric section bearing is sleeved on the outer periphery of the end of the eccentric section of the main shaft, an elastomer is arranged between the eccentric section bearing and the elastomer mounting hole, and the elastomer is arranged in the elastomer mounting hole. The present application reduces the load variation amplitude of the eccentric section bearing of the main shaft by arranging an elastomer between the moving plate and the eccentric section bearing of the main shaft, thereby improving the working life and operation stability of the moving plate, the eccentric section bearing of the main shaft and the whole machine.

Description

Technical Field

[0001] The present application relates to the technical field of scroll compressors, and in particular to a flexible scroll compressor. Background Art

[0002] The scroll compressor forms a compression chamber through the meshing of the moving plate scroll teeth and the fixed plate scroll teeth. As the moving plate (or moving plate) moves, the gas is compressed. The compressed gas exerts tangential, radial and axial forces on the moving plate. Usually, the axial rotation of the moving plate is balanced by the action of the eccentric small turn on the moving plate, and the axial gas force, tangential gas force and radial gas force on the moving plate are balanced by the main shaft. During the operation of the moving plate for one circle, the amplitude of each gas force is constantly changing, which causes the eccentric section bearing of the main shaft to vibrate during operation, aggravating the wear of the eccentric section bearing of the main shaft. As the wear increases, the rolling elements of the eccentric section bearing of the main shaft often fall off. The eccentric section bearing of the main shaft of the scroll compressor operates in a high temperature, large and complex load and vibration environment, and is the most important component that determines the normal operation and service life of the scroll compressor.

[0003] The radial flexible mechanism is a flexible connection set on the moving disk of the scroll compressor, which can improve the starting characteristics of the mechanism and the tolerance to impurities. The movable eccentric mechanism can achieve the purpose of radial flexibility. There are two commonly used radial flexible mechanisms, one is the eccentric bushing mechanism, and the other is the slider mechanism. The size of the radial flexible mechanism's turning radius determines the mutual meshing gap between the two scroll walls. Both of these radial flexible mechanisms use centrifugal force to change the turning radius of the moving disk. The range of variation is very small, and the meshing parts of the moving and fixed disk scroll teeth need to be in contact. It is only suitable for the case where the compression medium is refrigerant, etc., and cannot be used in gas compressors such as air and carbon dioxide.

[0004] Currently, the influence of overturning moment on the eccentric section bearing of the main shaft is reduced by installing electromagnets along the axial direction of the moving plate to adjust the moving plate posture in real time. This method cannot reduce the vibration and impact of the eccentric section bearing of the main shaft caused by the change of radial and axial gas force amplitude.

[0005] There are also attempts to reduce moving parts and friction pairs through magnetic levitation, but this method is too complicated, too difficult to implement, and too expensive. The exhaust volume and compression ratio are severely limited, and its engineering practice value is low. Summary of the invention

[0006] The present application provides a flexible scroll compressor, which can solve the technical problems existing in the prior art that the eccentric section bearing of the scroll compressor main shaft operates in a high temperature, large and complex load, and vibration environment, the radial vibration of the moving plate under the action of gas force, the rolling element of the eccentric section bearing of the main shaft wears quickly, and the rolling element often comes out and gets stuck due to changes in the working clearance, which seriously affects the service life and working state of the scroll compressor.

[0007] The present application provides a flexible scroll compressor, comprising:

[0008] The frame is provided with a first bearing hole;

[0009] The fixed plate comprises a fixed plate body and a fixed plate scroll gear arranged in the middle of the fixed plate body, and the frame cover is fixed to the end of the fixed plate body;

[0010] The movable plate comprises a movable plate scroll gear and a movable plate bottom plate, wherein the movable plate scroll gear is fixed to the front side of the movable plate bottom plate, the fixed plate scroll gear meshes with the movable plate scroll gear to form a compression chamber, and an elastic body mounting hole is opened in the middle of the back side of the movable plate bottom plate, and the elastic body mounting hole is a blind hole;

[0011] The main shaft comprises a main shaft section and an eccentric section extending along the length direction of the main shaft section and arranged non-coaxially with the main shaft section, the end of the eccentric section is located in the elastomer mounting hole, an eccentric section bearing is provided on the outer peripheral sleeve, and an elastomer is provided between the eccentric section bearing and the wall of the elastomer mounting hole.

[0012] In combination with the first aspect, in one embodiment, an eccentric segment bearing is sleeved on the outer periphery of the end of the eccentric segment of the main shaft, and the elastomer is arranged between the eccentric segment bearing and the wall of the elastomer mounting hole.

[0013] In combination with the first aspect, in one embodiment, the elastic body is an elastic ring, and the shape of the elastic ring is a hollow equal-thickness cylinder, a frustum with a hollow hole, or a partial sphere with a hollow hole.

[0014] In combination with the first aspect, in one embodiment, the elastomer is composed of elastic ring layers and rigid ring layers arranged radially at intervals, and all the elastic ring layers and all the rigid ring layers are coaxially or concentrically arranged.

[0015] In combination with the first aspect, in one implementation, the elastic ring layer is fixedly connected to an adjacent rigid ring layer.

[0016] In combination with the first aspect, in one implementation, radial thicknesses of the elastic ring layer and the rigid ring layer are substantially the same.

[0017] In combination with the first aspect, in one embodiment, the outermost layer and the innermost layer of the elastomer are both rigid layers.

[0018] In combination with the first aspect, in one embodiment, the elastomer includes at least one elastic ring layer.

[0019] In combination with the first aspect, in one implementation, the height of the rigid ring layer is greater than the height of the elastic ring layer.

[0020] In combination with the first aspect, in one embodiment, there is a gap between the outer wall surface of the eccentric section of the main shaft and the wall of the elastomer mounting hole, and the elastomer is movably disposed in the gap.

[0021] In combination with the first aspect, in one embodiment, the eccentricity between the main shaft eccentric section and the main shaft section is less than or equal to the eccentricity of the main shaft eccentric section in the meshing clearance state of the moving plate scroll tooth and the fixed plate scroll tooth set when there is no elastic body.

[0022] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0023] The present application arranges an elastic body between the wall of the elastic body mounting hole of the moving disk and the eccentric section bearing of the main shaft, thereby reducing the impact of the change of gas force on the moving disk and the eccentric section bearing of the main shaft during the gas compression process of the scroll compressor, ensuring the normal working clearance of the eccentric section bearing of the main shaft, thereby reducing the friction of the eccentric section bearing of the main shaft, preventing the increase of the clearance of the eccentric section bearing of the main shaft due to vibration and friction, reducing the risk of the rolling element of the eccentric section bearing of the main shaft falling off, and improving the working life and operation stability of the moving disk, the eccentric section bearing of the main shaft and the whole machine;

[0024] At the same time, due to the presence of the elastomer, when encountering foreign particles or droplets during the compression process, the movable scroll tooth can be disengaged from the meshing point to avoid it, thereby preventing or reducing damage to the scroll tooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the exploded structure of a flexible scroll compressor provided in an embodiment of the present application;

[0027] Figure 2 Another schematic diagram of the exploded structure of a flexible scroll compressor provided in an embodiment of the present application;

[0028] Figure 3 A cross-sectional view of a flexible scroll compressor provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a moving plate and an elastic body as a whole in a flexible scroll compressor provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of an elastic body in a flexible scroll compressor provided in an embodiment of the present application;

[0031] Figure 6 for Figure 5 Schematic diagram of the enlarged structure in the middle circle;

[0032] Figure 7 A top view of an elastic body provided in an embodiment of the present application;

[0033] Figure 8 A cross-sectional view of an elastic body provided in an embodiment of the present application;

[0034] Fig. 9 (a) is one of the illustrations of the eccentricity of the main shaft and its eccentric section provided in the embodiment of the present application; Fig. 9 (b) is the second illustration of the eccentricity of the main shaft and its eccentric section provided in the embodiment of the present application;

[0035] Fig.10 A diagram illustrating the geometric relationship between the compression of the elastic body, the eccentricity of the main shaft, and the force provided in the embodiment of the present application.

[0036] In the figure: 1, frame; 11, first bearing hole; 2, main shaft; 21, main shaft section; 22, eccentric section; 31, moving plate bottom plate; 311, elastomer mounting hole; 32, moving plate scroll gear; 33, moving plate bottom plate; 331, exhaust hole; 41, fixed plate body; 5, elastomer; 51, rigid ring layer; 52, elastic ring layer; 6, eccentric section bearing; 7, liner sleeve. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Please refer to Figure 1-Figure 3The present application provides a flexible scroll compressor, including a frame 1, a fixed plate, a moving plate and a main shaft 2, wherein the frame 1 is provided with a first bearing hole 11, the fixed plate includes a fixed plate body 41 and a fixed plate scroll tooth arranged in the middle of the fixed plate body 41; the moving plate includes a moving plate bottom plate 31 and a moving plate scroll tooth 32 arranged on the front of the moving plate bottom plate 31, the moving plate scroll tooth 32 and the fixed plate scroll tooth meshing to form a compression chamber, and an elastic body mounting hole 311 is provided in the middle of the back side of the moving plate bottom plate 31 (not necessarily the middle); the main shaft 2 includes a main shaft section 21 and an eccentric section 22, the eccentric section 22 and the main shaft section 21 are both cylindrical shafts, and the eccentric section 22 and the main shaft section 21 are connected and non-coaxially arranged; the main shaft section 21 includes a first shaft section and a second shaft section, the main shaft section 21 passes through the first bearing hole 11, the first shaft section extends out of the frame 1, and the The second shaft section is located in the frame 1, and the end of the eccentric section 22 is limited in the elastomer mounting hole 311; conventionally, an eccentric section bearing 6 is provided on the outer periphery of the eccentric section 22, and a gap is provided between the eccentric section bearing 6 and the wall of the elastomer mounting hole 311; preferably, in order to reduce the impact of the change of gas force on the moving plate and the eccentric section bearing 6 of the main shaft 2 during the gas compression process of the scroll compressor, an elastomer 5 is added between the eccentric section bearing 6 and the wall of the elastomer mounting hole 311, thereby reducing the vibration impact on the eccentric section bearing 6 of the main shaft 2, ensuring the normal working clearance of the eccentric section bearing 6 of the main shaft 2, preventing the increase in the working clearance of the eccentric section bearing 6 of the main shaft 2 due to vibration and friction, reducing the risk of rolling elements of the eccentric section bearing 6 of the main shaft 2 falling off, and improving the working life and operation stability of the moving plate, the eccentric section bearing 6 of the main shaft 2 and the whole machine.

[0039] In one embodiment, an eccentric segment bearing 6 is sleeved on the outer periphery of the end of the eccentric segment of the main shaft, and the elastomer 5 is arranged in the working gap between the eccentric segment bearing 6 and the wall of the elastomer mounting hole 311. Preferably, the outer ring layer of the elastomer 5 and the wall of the elastomer mounting hole 311 are fixedly connected together, and the inner ring layer of the elastomer 5 and the outer ring of the eccentric segment bearing 6 are fixedly connected together.

[0040] In one embodiment, the elastomer 5 is an elastic ring, which is located in the elastomer mounting hole 311 and on the outer periphery of the eccentric section bearing 6; the shape of the elastic ring is a hollow cylinder of equal thickness, a frustum with a hollow hole, or a partial sphere with a hollow hole.

[0041] In one embodiment, if Figure 4 As shown, a metal ring, specifically a liner sleeve 7, may be arranged between the elastomer 5 and the eccentric segment bearing 6.

[0042] In one embodiment, if Figure 5-Figure 8As shown, the elastic body 5 is a multi-layer structure, specifically, a rigid layer 51 and an elastic layer 52 are arranged radially at intervals, and adjacent layers are fixedly connected; the elastic body 5 includes at least one rigid layer 51 and one elastic layer 52, providing an elastic space for the center deviation of the eccentric section bearing 6. It can be understood that the rigid layer 51 is relatively thin, and only plays a structural maintenance role for the elastic layer 52 of the inner layer, so that the deformation of the elastic body 5 is as uniform as possible, the service life of the elastic body 5 is increased, and the normal operation of the gas compression function of the scroll compressor is guaranteed.

[0043] In one embodiment, the rigid ring layer 51 is a ring made of a rigid material, and the elastic ring layer 52 is a ring made of an elastic material.

[0044] In one embodiment, the outermost circle layer and the innermost circle layer of the elastic body 5 are both rigid circles 51 , which facilitates the installation of the elastic body 5 .

[0045] In one embodiment, the radial thickness of all rigid ring layers 51 and the elastic ring layer 52 are the same. In the modified embodiment of the present application, the thickness of the rigid ring layer 51 and the elastic ring layer 52 can also be set to a non-equal thickness design. Specifically, the radial thickness of the rigid ring layer 51 and the elastic ring layer 52 is gradually increased along the radial direction toward the center; the radial thickness of multiple rigid ring layers 51 can also be gradually reduced along the radial direction toward the center, and the radial thickness of multiple elastic ring layers 52 can be gradually increased along the radial direction toward the center.

[0046] In one embodiment, the heights of the rigid ring layers 51 are all greater than the heights of the elastic ring layers 52, providing stress strain space for the elastic ring layers 52, preventing the elastic ring layers 52 from deforming after being stressed and protruding from the top or bottom of the adjacent rigid ring layers 51. The top ring edge or the bottom ring edge of the rigid ring layer 51 forms a stress cutting effect on the protruding part of the elastic ring layer 52 that is squeezed and deformed, causing damage to the elastic ring layer 52. The height of the rigid ring layer 51 is designed to be higher than the elastic ring layer 52, providing space for the elastic ring layer 52 to deform under stress.

[0047] In one embodiment, if Fig. 9 As shown, the eccentricity between the eccentric section 22 of the main shaft 2 and the main shaft section 21 is less than or equal to the eccentricity of the eccentric section 22 of the main shaft 2 in the meshing clearance state of the moving disk scroll gear and the fixed disk scroll gear set without the elastic body. Figure 5 As shown, the main shaft 2 has an eccentric section 22, and the radial distance from the center of the eccentric section 22 to the axis of the main shaft 2 is the eccentric distance of the eccentric section 22; Fig. 9As shown, the eccentricity of the eccentric section 22 of the main shaft 2 can be designed to be less than or equal to the eccentricity of the eccentric section 22 of the main shaft 2 in the meshing clearance state of the moving disk scroll teeth and the fixed disk scroll teeth set when there is no elastic body. In this way, when the scroll compressor is operating normally, the eccentricity of the eccentric section 22 of the main shaft 2 and the elastic deformation of the elastomer 5 together constitute the eccentricity when the moving and fixed disk scroll teeth are meshing in the working state. Fig.10 As shown in the figure, the center of the outer ring (moving disk) of the elastomer 5 is in a horizontal position, and the moving and fixed disks are normally meshed. The angle β is the angle between the compression direction of the elastomer 5 (the direction of the force exerted by the main shaft 2 on the elastomer 5) and the vertical direction. The size of this angle depends on the eccentricity of the eccentric section 22 of the main shaft 2 and the radial stiffness of the elastomer 5. By designing the eccentricity of the eccentric section 22 of the main shaft 2 and the radial stiffness of the elastomer 5, the force exerted by the eccentric section 22 of the main shaft 2 on the elastomer 5 in the working state can be equal to or very close to the force exerted by the moving disk on the elastomer 5, that is, the radial component of the force exerted by the eccentric section 22 of the main shaft 2 on the elastomer 5 is equal to the radial component Fr of the gas force and the centrifugal force on the moving disk, and the tangential component of the force exerted by the eccentric section 22 of the main shaft 2 on the elastomer 5 is equal to the tangential component Ft of the gas force and the centrifugal force on the moving disk, so that the center of the moving disk is in the vortex tooth meshing position set when there is no elastomer.

[0048] In one embodiment, an exhaust hole 331 is formed on the bottom plate of the fixing plate.

[0049] The present application proposes to set an elastomer 5 between the eccentric segment bearing 6 and the wall of the elastomer mounting hole 311 of the moving plate, so as to reduce the vibration and impact on the eccentric segment bearing 6 of the moving plate and the main shaft 2, reduce wear and increase its service life. At the same time, it is proposed that the eccentric distance of the eccentric segment 22 of the main shaft 2 is less than or equal to the eccentric distance in the meshing gap state set when there is no elastomer, so that the stiffness of the elastomer 5 can be designed so that the moving and fixed plates can meet the designed meshing relationship after the elastomer 5 is deformed during normal operation.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0051] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A flexible scroll compressor, characterized in that: include: The frame is provided with a first bearing hole; The fixed plate comprises a fixed plate body and a fixed plate scroll gear arranged in the middle of the fixed plate body, and the frame cover is fixed to the end of the fixed plate body; The movable plate comprises a movable plate scroll gear and a movable plate bottom plate, wherein the movable plate scroll gear is fixed to the front side of the movable plate bottom plate, the fixed plate scroll gear meshes with the movable plate scroll gear to form a compression chamber, and an elastic body mounting hole is opened in the middle of the back side of the movable plate bottom plate, and the elastic body mounting hole is a blind hole; A main shaft, the main shaft comprises a main shaft section and an eccentric section extending from the main shaft section in the length direction and arranged non-coaxially with the main shaft section, the main shaft section extends from the first bearing hole for connecting with a driving mechanism, the end of the eccentric section is located in the elastic body mounting hole, an elastic body is arranged between the main shaft eccentric section and the wall of the elastic body mounting hole; an eccentric section bearing is sleeved on the outer periphery of the end of the main shaft eccentric section, and the elastic body is arranged between the eccentric section bearing and the wall of the elastic body mounting hole; the elastic body is formed by elastic ring layers and rigid ring layers arranged radially at intervals, and all elastic ring layers and all rigid ring layers are arranged coaxially; the shape of the elastic body is a frustum with a hollow hole; The eccentricity between the main shaft eccentric section and the main shaft section is less than or equal to the eccentricity of the main shaft eccentric section in the meshing clearance state of the moving plate scroll gear and the fixed plate scroll gear set when there is no elastic body.

2. The flexible scroll compressor according to claim 1, characterized in that: The elastic ring layer is firmly connected to the adjacent rigid ring layer.

3. The flexible scroll compressor according to claim 1, characterized in that: The outermost layer and the innermost layer of the elastic body are both rigid layers.

4. The flexible scroll compressor according to claim 3, characterized in that: The height of the rigid ring layer is greater than the height of the elastic ring layer.

5. The flexible scroll compressor according to claim 1, characterized in that: There is a gap between the outer wall surface of the proximal end portion of the eccentric section of the main shaft and the wall of the elastic body mounting hole, and the elastic body is fixedly arranged in the gap.

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