Balance weight of scroll compressor, and scroll compressor

Abstract

A balance weight of a scroll compressor, and a scroll compressor. The balance weight comprises a fixing ring (1) and a counterweight (2). The counterweight (2) is configured to be connected onto the fixing ring (1). The fixing ring (1) engages with the counterweight (2) by means of a first serrated surface (110) and a second serrated surface (200) which match each other. The first serrated surface (110) is located on the fixing ring (1), and the second serrated surface (200) is located on the counterweight (2). The fixing ring (1) and the counterweight (2) of the present split-type balance weight engage with each other by means of the matching first serrated surface (110) and second serrated surface (200), so as to increase the contact area between the fixing ring (1) and the counterweight (2) and enhance the connection strength therebetween. Even if the balance weight is subjected to large centrifugal forces, the integrity of the split-type balance weight can still be ensured. In this way, the working reliability of the scroll compressor is ensured. In other words, the fixing ring (1) and the counterweight (2) of the balance weight adopt a serrated matching structure, so that the matching area within the same space is increased multiple times, thereby effectively reducing stress levels and improving resistance to centrifugal forces.

Description

Balance block of scroll compressor and scroll compressor

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2023, with application number 202322042039.7 and invention name “Balance block of scroll compressor and scroll compressor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of compressors, and in particular to a balancing block of a scroll compressor and a scroll compressor. Background Art

[0003] As a typical structure of compressor, scroll compressor is mainly used in air conditioning, refrigeration, general gas compression, as well as in automobile engine superchargers and vacuum pumps. It can replace traditional medium and small reciprocating compressors to a large extent.

[0004] A scroll compressor typically includes a compression mechanism consisting of a fixed scroll and an orbiting scroll. The orbiting scroll is supported by a main bearing / thrust plate to provide axial restraint and rotates translationally relative to the fixed scroll, driven by an eccentric component, such as an eccentric shaft. During operation, the centrifugal force or centrifugal torque generated by the rotation of the eccentric component can cause vibration in the compressor. A balancing weight is typically provided on a rotating component, such as a rotor, to provide counter-centrifugal force or centrifugal torque to balance the dynamic imbalance generated by the eccentric component.

[0005] Currently, split balancing weights are commonly used. Compared with integrated balancing weights, split balancing weights have fewer structural restrictions and are more efficient in balancing weight. However, the centrifugal force generated by high-speed rotation of the drive shaft is very large, and the two spliced ​​pieces of split balancing weights may become detached due to insufficient connection strength.

[0006] Summary of the Invention

[0007] In order to solve the technical problems existing in the prior art, the present application provides a balancing block of a scroll compressor and a scroll compressor.

[0008] In one aspect, the present application provides a balancing block for a scroll compressor, the balancing block comprising:

[0009] a fixing ring configured to be fixedly sleeved on a drive shaft of the scroll compressor;

[0010] The counterweight is constructed to be connected to the fixing ring; and the fixing ring and the counterweight are engaged through a matching first serrated surface and a second serrated surface, wherein the first serrated surface is located on the fixing ring and the second serrated surface is located on the counterweight.

[0011] In one embodiment, the fixing ring has an annular center portion having a center hole for connecting to the drive shaft. The fixing ring also has two side wings extending in opposite directions from part of the outer periphery of the center portion, and the first serrated surface is arranged on the two side wings.

[0012] In one embodiment, an angle A between an upper edge of the first serrated surface and a central angle of the central hole is smaller than 180°.

[0013] In one embodiment, an angle A formed by an upper edge of the first serrated surface relative to a central angle of the central hole is smaller than 170° and larger than 160°.

[0014] In one embodiment, during assembly, the counterweight is configured to move radially along the central hole of the fixing ring relative to the second serrated surface to a preset position under an external force until the first serrated surface engages with the second serrated surface;

[0015] The balancing block also includes a guide structure, which is configured to move the counterweight block along a preset path relative to the counterweight block during assembly, and to maintain a preset distance between the first serrated surface and the second serrated surface, and only after the counterweight block moves to a preset position will the first serrated surface and the second serrated surface engage.

[0016] In one embodiment, the balancing weight includes three guide structures, and the three guide structures are distributed in a triangle.

[0017] In one embodiment, the guide structure includes a guide groove, a guide post, and a positioning hole provided in the guide groove, wherein one of the guide groove and the guide post is provided on the fixing ring, and the other is provided on the counterweight block, and the guide groove extends along the preset path direction;

[0018] When assembling the fixing ring and the counterweight, the guide post moves along the guide groove and maintains a preset distance between the first serrated surface and the second serrated surface until the first serrated surface and the second serrated surface are engaged when the guide post is inserted into the positioning hole.

[0019] In one embodiment, the extending direction of the guide groove from the first end portion to the second end portion is inclined toward the direction in which the first serrated surface approaches the second serrated surface, wherein the positioning hole is provided at the second end portion.

[0020] In one embodiment, the counterweight block is in a "C"-shaped structure. After assembly, the central angle of the counterweight block is substantially coaxial with the central hole of the fixing ring.

[0021] On the other hand, the present application provides a scroll compressor, comprising:

[0022] a frame, configured to be connected to the fixed scroll of the scroll compressor and used to support the movable scroll of the scroll compressor, wherein the frame has an accommodating cavity and a thrust surface through-hole communicating with the accommodating cavity, wherein the thrust surface through-hole is provided on a thrust surface of the frame supporting the movable scroll;

[0023] a drive shaft, the drive shaft passing through the frame and passing through the thrust surface through-hole to drive the orbiting scroll to translate relative to the fixed scroll;

[0024] A balancing weight is provided on the drive shaft and is configured to provide a reverse centrifugal force or centrifugal torque to balance the dynamic unbalance generated by the eccentric shaft section of the drive shaft. The balancing weight is specifically a balancing weight as described in any one of the above items.

[0025] One of the beneficial effects of the scroll compressor balance block of the present application is that compared with the two splicing parts of the split balance block in the prior art that adopt a flat fit, the scroll compressor of the present application uses a split balance block, and the fixed ring and the counterweight of the split balance block engage with each other through a matching first serrated surface and a second serrated surface, thereby increasing the contact area between the fixed ring and the counterweight and enhancing the connection strength between the two. Even when the balance block is subjected to a large centrifugal force, the integrity of the split balance block can be ensured, thereby ensuring the working reliability of the scroll compressor. In other words, the fixed ring and the counterweight of the balance block of the present application adopt a serrated fitting structure, and the fitting area in the same space is increased many times, which effectively reduces the stress level and improves the ability to resist centrifugal force.

[0026] In addition, in order to reduce the resistance to the movement of the counterweight block relative to the fixed ring, the balance block of the present application also includes a guide structure, which is configured to move the counterweight block along a preset path relative to the counterweight block during assembly, and to maintain a preset distance between the first serrated surface and the second serrated surface, and after the counterweight block moves to the preset position, the first serrated surface and the second serrated surface are engaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0028] FIG1 is a schematic diagram of the three-dimensional structure of a balancing weight of the present application in one embodiment;

[0029] FIG2 is a schematic diagram of the top view of the balancing block shown in FIG1 ;

[0030] FIG3 is a schematic diagram of a cross-sectional structure of the balancing block shown in FIG2 , viewed along the KK axis;

[0031] FIG4 is a schematic cross-sectional view of the balancing block shown in FIG2 along the LL direction;

[0032] FIG5 is a schematic structural diagram of the counterweight block of the split balancing block shown in FIG1 ;

[0033] FIG6 is a schematic cross-sectional view of the counterweight block shown in FIG5 taken along the JJ axis;

[0034] FIG7 is a schematic structural diagram of the fixing ring of the split balancing weight shown in FIG1 ;

[0035] FIG8 is a schematic cross-sectional view of the fixing ring shown in FIG7 taken along the RR direction;

[0036] FIG9 is a schematic diagram of the local stress distribution of the fixing ring of the conventional balancing weight;

[0037] FIG10 shows the deformation of the conventional balancing block in the diameter direction;

[0038] FIG11 is a schematic diagram of stress distribution on a first serrated surface of a fixing ring of a balancing weight of the present application in one embodiment;

[0039] FIG. 12 shows the deformation of the balancing weight of the present application in the diameter direction in one embodiment.

[0040] The one-to-one correspondence between the component names and figure marks in Figures 1 to 12 is as follows: 1 Fixed ring: 10 center part, 100 center hole, 101 guide column, 11 side wing, 110 first serrated surface, 12 first mounting hole; 2 Counterweight block: 200 second serrated surface, 201 second mounting hole, 202 guide groove, 203 positioning hole. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0043] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0044] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0045] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] For ease of understanding, the specific structure and working principle of the scroll compressor of the present application will be described in detail below in combination with a specific embodiment with reference to FIG. 1 to FIG.

[0047] It should be noted that the terms "axial, radial, and circumferential" used in this article to describe the specific structure of the scroll compressor are set based on the drive shaft. The axial direction of the drive shaft is recorded as axial, the radial direction of the drive shaft is recorded as radial, and the circumferential direction of the drive shaft is recorded as circumferential.

[0048] In this embodiment, the scroll compressor includes a body, a fixed scroll and a movable scroll.

[0049] The machine body is usually a thin-walled shell structure, and the space inside the shell is sufficient to accommodate the fixed scroll 2, the movable scroll, and a driving mechanism that drives the movable scroll to rotate around the fixed scroll.

[0050] Both the stationary and orbiting scrolls feature vortex-shaped blades, meshing with each other at 180° intervals. The orbiting scroll is driven by a crankshaft with a very small eccentricity and constrained by an anti-rotation mechanism. It orbits the stationary scroll in a planar motion with a very small radius, thereby forming a series of crescent-shaped cylindrical working volumes in conjunction with the end plates.

[0051] It should be noted that, as to the specific structures of the engine body, the static scroll and the orbiting scroll and their mutual assembly relationship, those skilled in the art may adopt existing technologies, which will not be elaborated herein.

[0052] The scroll compressor also includes a drive shaft, a frame, and a counterweight.

[0053] The frame is configured to be connected to the stationary scroll and used to support the movable scroll, and the frame has an accommodating cavity and a thrust surface through hole communicating with the accommodating cavity. The thrust surface through hole is provided on the thrust surface of the frame 5 supporting the movable scroll.

[0054] Specifically, the frame comprises a main body and four connecting arms. The main body is constructed to support the orbiting scroll and defines a receiving cavity. The four connecting arms are spaced axially and circumferentially along the outer peripheral wall of the main body, and each connecting arm is formed by radially extending outward from the main body. The connecting arms and the fixed scroll are fixedly connected by welding, bonding, riveting, or other methods, and can also be removably connected using fasteners such as screws and bolts. The top surface of the main body serves as a thrust surface, which contacts the orbiting scroll to support the orbiting scroll and support the orbiting scroll so that it rotates translationally relative to the fixed scroll.

[0055] It can be understood that the number of connecting arms is not limited to that in this embodiment, as long as it is two or an integer greater than two, those skilled in the art will select an appropriate number based on the actual structure.

[0056] The drive shaft consists of a main shaft section and an eccentric shaft section that are connected to each other. The main shaft section is coaxially connected to the rotor of the drive motor and extends through the frame. The eccentric shaft section of the drive shaft passes through the thrust surface through-hole of the frame and connects to the orbiting scroll, so that the eccentric shaft section drives the orbiting scroll to rotate translationally relative to the fixed scroll.

[0057] The balancing block is set on the main shaft section of the drive shaft by key connection, welding, bonding, etc. so that it rotates synchronously with the drive shaft. It is constructed to provide reverse centrifugal force or centrifugal torque to balance the dynamic imbalance generated by the eccentric shaft section of the drive shaft.

[0058] Referring to Figure 1 , in this embodiment, the balancing weight includes a fixing ring 1 and a counterweight 2. For a better understanding, please also refer to Figures 2 to 8 .

[0059] The fixing ring 1 is constructed to be fixedly mounted on the drive shaft of the scroll compressor. Specifically, the fixing ring 1 has an annular center portion 10 with a center hole 100 formed therein. The eccentric shaft section of the drive shaft passes through the center hole 100 and is fixedly connected to the positioning ring through a shaft-hole matching relationship so that the drive shaft drives the positioning ring and the drive shaft to rotate synchronously.

[0060] The counterweight 2 is constructed to be connected to the fixing ring 1 , and the fixing ring 1 and the counterweight 2 are engaged through matching first serrated surfaces 110 and second serrated surfaces 200 . The first serrated surface 110 is provided on the fixing ring 1 , and the second serrated surface 200 is provided on the counterweight 2 .

[0061] Obviously, compared with the two splicing parts of the split balancing block in the prior art that adopt a flat fit, the scroll compressor of the present application uses a split balancing block, and the fixed ring 1 and the counterweight block 2 of the split balancing block are engaged through the matching first serrated surface 110 and the second serrated surface 200, which increases the contact area between the fixed ring 1 and the counterweight block 2 and enhances the connection strength between the two. Even when the balancing block is subjected to a large centrifugal force, the integrity of the split balancing block can be guaranteed, thereby ensuring the working reliability of the scroll compressor. In other words, the fixed ring 1 and the counterweight block 2 of the balancing block of the present application adopt a serrated fitting structure, and the fitting area in the same space is increased many times, which effectively reduces the stress level and improves the ability to resist centrifugal force.

[0062] Continuing to refer to Figures 7 and 8, the fixing ring 1 of the present application has a circular center portion 10, the center portion 10 has a center hole 100 for connecting to the drive shaft, and part of the outer periphery of the fixing ring 1 extends in opposite directions to form two side wings 11, and the first serrated surface 110 is roughly arranged on the two side wings 11.

[0063] With such an arrangement, the central portion 10 on the fixing ring 1 for connection with the drive shaft can have a small radial dimension and light weight, and with the help of the side wing 11, the first serrated surface 110 can have a larger area, so that a second serrated surface 200 with an area matching the first serrated surface 110 can be provided on the counterweight block 2 to ensure the connection strength between the fixing ring 1 and the counterweight block 2.

[0064] Continuing to refer to Figure 7, in this embodiment, the upper edge of the first serrated surface 110 on the fixing ring 1 of the present application, the upper edge mentioned herein refers to the setting based on Figure 7, that is, the side of the first serrated surface 110 close to the center of the circle 100 in Figure 7 is the upper side, and the side away from the center of the circle 100 is the lower side.

[0065] Specifically, in this embodiment, the upper edge of the first serrated surface 110 of the fixing ring 1 has a central angle A of less than 180° relative to the center hole 100, that is, the first serrated surface 110 is eccentrically arranged relative to the center hole 100 of the central portion 10 to facilitate the construction of the counterweight 2 eccentrically connected to the fixing ring 1.

[0066] More specifically, in this embodiment, the central angle A of the upper edge of the first serrated surface 110 of the fixing ring 1 relative to the central hole 100 is smaller than 170° and larger than 160°.

[0067] As mentioned above, the frame has an accommodating cavity and a thrust surface through hole communicated with the accommodating cavity. The thrust surface through hole is provided on the thrust surface of the frame supporting the movable scroll.

[0068] Alternatively, in one embodiment, a radial through hole is opened on the frame, and the counterweight block 2 is constructed to be placed into the accommodating cavity through the radial through hole, and then the counterweight block 2 is pushed to move radially toward the driving shaft to a preset position, and finally the counterweight block 2 is connected to the fixing ring 1.

[0069] Based on this structure, the assembly method of the split balancing block of the present application is to place the counterweight block 2 into the accommodating cavity through the thrust surface through hole or the radial through hole, and then push the counterweight block 2 to move radially to a preset position relative to the fixing ring 1, and finally fix the counterweight block 2 to the fixing ring 1.

[0070] With this arrangement, the balancing block can be installed in the frame to maintain a better balancing effect, and the factor that the size of the thrust surface through hole limits the overall outer diameter of the balancing block can be eliminated. A balancing block with a suitable outer diameter can be selected according to actual needs, making the scroll compressor reliable, low-cost and well-balanced.

[0071] Specifically, when the fixing ring 1 and the counterweight 2 are assembled, the fixing ring 1 is pre-installed on the drive shaft, and the counterweight 2 is configured to move to a preset position radially relative to the second serrated surface 200 along the center hole 100 of the fixing ring 1 under external force, so that the first serrated surface 110 and the second serrated surface 200 are engaged.

[0072] In order to reduce the resistance to the movement of the counterweight block 2 relative to the fixed ring 1, in this embodiment, the balance block of the present application also includes a guide structure, which is configured to move the counterweight block 2 along a preset path relative to the counterweight block 2 during assembly, and maintain a preset distance between the first serrated surface 110 and the second serrated surface 200, and only after the counterweight block 2 moves to the preset position, the first serrated surface 110 and the second serrated surface 200 are engaged.

[0073] With such an arrangement, when the fixing ring 1 and the counterweight 2 are assembled, after the counterweight 2 is placed into the accommodating cavity from the thrust surface through hole or the radial through hole, during the process when the external force pushes the counterweight 2 to move relative to the fixing ring 1, a preset distance is maintained between the first serrated surface 110 and the second serrated surface 200. The specific value of the preset distance is based on avoiding direct contact between the first serrated surface 110 and the second serrated surface 200 when the space in the accommodating cavity permits, and is not specifically limited here.

[0074] The external force required to push the counterweight 2 to move is small. Only when the counterweight 2 reaches the preset position will the first serrated surface 110 and the second serrated surface 200 engage to ensure that the first mounting hole 12 on the fixing ring 1 and the second mounting hole 201 on the counterweight 2 are aligned. Finally, the counterweight 2 is fixed to the fixing ring 1 by passing bolts or screws through the first mounting hole 12 and the second mounting hole 201.

[0075] In detail, referring to Figures 5 and 6, in this embodiment, the guide structure of the present application includes a guide groove 202 opened on the counterweight block 2, and the guide groove 202 extends along the direction of movement of the counterweight block 2 relative to the fixed ring 1, that is, the guide groove 202 extends along the preset path of movement of the counterweight block 2 relative to the fixed ring 1, and a positioning hole 203 is also provided in the guide groove 202.

[0076] 7 and 8 , in this embodiment, the guide structure of the present application further includes a guide post 101 provided on the fixing ring 1 .

[0077] Based on the above structure, when assembling the fixing ring 1 and the counterweight 2, the fixing ring 1 is pre-installed on the drive shaft, and then the relative positions of the counterweight 2 and the fixing ring 1 are adjusted so that the guide column 101 of the fixing ring 1 is inserted into the guide groove 202 on the counterweight 2, and then the counterweight 2 is pushed to move relative to the fixing ring 1 along the extension direction of the guide groove 202. During this process, there is a preset distance between the first serrated surface 110 of the fixing ring 1 and the second serrated surface 200 of the counterweight 2 so that there is no contact between the two. Continue to push the counterweight 2. When the guide column 101 is inserted into the positioning hole 203 in the guide groove 202 and cannot move anymore, it means that the counterweight 2 has reached the preset position, and the first serrated surface 110 and the second serrated surface 200 are engaged. Finally, the counterweight 2 is fixed to the fixing ring 1 by bolts.

[0078] Obviously, in the above embodiment, the guide column 101 is arranged on the fixed ring 1, and the guide groove 202 cooperating therewith is arranged on the counterweight block 2. It can be understood that, on the basis of satisfying the guiding function of the counterweight block 2 when it moves relative to the fixed ring 1, the guide column 101 and the guide groove 202 can also be arranged in reverse, that is, the guide column 101 is arranged on the counterweight block 2, and the guide groove 202 is opened on the fixed ring 1. Of course, the positioning hole 203 is arranged in the guide groove 202 of the fixed ring 1.

[0079] Based on this structure, when assembling the fixing ring 1 and the counterweight 2, the fixing ring 1 is pre-installed on the drive shaft, and then the relative positions of the counterweight 2 and the fixing ring 1 are adjusted so that the guide column 101 of the counterweight 2 is inserted into the guide groove 202 on the fixing ring 1, and then the counterweight 2 is pushed to move relative to the fixing ring 1 along the extension direction of the guide groove 202. During this process, there is a preset distance between the first serrated surface 110 of the fixing ring 1 and the second serrated surface 200 of the counterweight 2 so that there is no contact between the two. Continue to push the counterweight 2. When the guide column 101 is inserted into the positioning hole 203 in the guide groove 202 and cannot move anymore, it means that the counterweight 2 has reached the preset position, and the first serrated surface 110 and the second serrated surface 200 are engaged. Finally, the counterweight 2 is fixed to the fixing ring 1 by bolts.

[0080] Furthermore, in this embodiment, the guide groove 202 of the present application is inclined from the first end to the second end along the direction of the first serrated surface 110 close to the second serrated surface 200, wherein the second end is the end where the positioning hole 203 is provided.

[0081] With such arrangement, during the movement of the counterweight 2 relative to the fixed ring 1, the first serrated surface 110 and the second serrated surface 200 gradually move toward each other by maintaining a preset distance until the guide column 101 is engaged with the positioning hole 203 of the guide groove 202, at which point the first serrated surface 110 and the second serrated surface 200 are completely engaged, thereby making the relative movement of the counterweight 2 and the fixed ring 1 relatively smooth.

[0082] Continuing to refer to Figures 5 and 7, in this embodiment, the scroll compressor of the present application includes three guide structures, and these three guide structures are arranged in a triangle, so as to play a better guiding role and further improve the smoothness of the movement of the counterweight block 2 relative to the fixed ring 1.

[0083] In addition, referring to Figure 5, in this embodiment, the counterweight block 2 of the present application has a "C"-shaped structure, that is, a partial circular ring structure with a notch, and its central angle B is less than 180°. It is best when its central angle B is less than 170° and greater than 160°, that is, the central angle B of the counterweight block 2 is basically consistent with the central angle A of the upper edge of the first serrated surface 110 of the fixing ring 1 relative to the center of the center hole 100.

[0084] Moreover, when the fixing ring 1 and the counterweight 2 are assembled, the center hole 100A of the fixing ring 1 and the central angle B of the counterweight 2 are substantially coaxial.

[0085] This arrangement can ensure that the overall force on the balancing block is balanced.

[0086] As mentioned above, the fixed ring 1 and the counterweight 2 of the balancing block of the present application adopt a serrated matching structure, and the matching area in the same space is increased many times, which effectively reduces the stress level and improves the ability to resist centrifugal force. In order to better understand the advantages of the balancing block of the present application over the existing balancing block, the differences between the two are analyzed from the perspective of force in combination with Figures 9 to 12. Among them, Figure 9 is a schematic diagram of the local stress (unit: MPa) distribution of the fixed ring 1 of the existing balancing block, Figure 10 is the deformation of the existing balancing block in the diameter direction (unit: mm), Figure 11 is a schematic diagram of the stress (unit: MPa) distribution on the first serrated surface 110 of the fixed ring 1 of the balancing block of the present application in one embodiment, and Figure 12 is the deformation of the balancing block of the present application in the diameter direction (unit: mm) in one embodiment.

[0087] Comparing FIG9 with FIG11 , it can be seen that the stress of the balancing weight of the present application is much smaller than that of the existing balancing weight.

[0088] Comparing FIG10 with FIG12 , it can be seen that the deformation of the balancing weight of the present application in the diameter direction is much smaller than that of the existing balancing weight in the diameter direction.

[0089] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A balancing block for a scroll compressor, characterized in that: The balancing block comprises: A fixing ring, configured to be fixedly sleeved on a driving shaft of the scroll compressor; The counterweight block is constructed to be connected to the fixing ring; and the fixing ring and the counterweight block are engaged through a matching first serrated surface and a second serrated surface, wherein the first serrated surface is located on the fixing ring and the second serrated surface is located on the counterweight block.

2. The balancing weight according to claim 1, characterized in that: The fixing ring has an annular central portion having a central hole for connecting with the driving shaft. The fixing ring also has two side wings extending in opposite directions from a portion of the outer periphery of the central portion, and the first serrated surface is arranged on the two side wings.

3. The balancing weight according to claim 2, characterized in that: An angle A between an upper edge of the first serrated surface and a center point of the central hole is less than 180°.

4. The balancing weight according to claim 3, characterized in that: An angle A of an upper edge of the first serrated surface relative to a central angle of the central hole is smaller than 170° and larger than 160°.

5. The balancing weight according to any one of claims 1 to 4, characterized in that: During assembly, the counterweight is configured to move to a preset position relative to the second serrated surface along the central hole of the fixing ring under external force until the first serrated surface is engaged with the second serrated surface; The balancing block also includes a guide structure, which is configured to move the counterweight block along a preset path relative to the counterweight block during assembly, maintain a preset distance between the first serrated surface and the second serrated surface, and engage the first serrated surface with the second serrated surface only after the counterweight block moves to a preset position.

6. The balancing weight according to claim 5, characterized in that: The balancing block includes three guide structures, and the three guide structures are distributed in a triangle.

7. The balancing weight according to claim 5, characterized in that: The guide structure comprises a guide groove, a guide column and a positioning hole arranged in the guide groove, one of the guide groove and the guide column is arranged on the fixing ring, and the other is arranged on the counterweight block, and the guide groove extends along the preset path direction; When assembling the fixing ring and the counterweight, the guide post moves along the guide groove and keeps a preset distance between the first serrated surface and the second serrated surface until the first serrated surface and the second serrated surface are engaged when the guide post is inserted into the positioning hole.

8. The balancing weight according to claim 7, characterized in that: The extending direction of the guide groove from the first end to the second end is inclined toward the direction in which the first serrated surface approaches the second serrated surface, wherein the positioning hole is arranged at the second end.

9. The balancing weight according to any one of claims 2 to 4, characterized in that: The counterweight block is in a "C"-shaped structure. After assembly, the central angle of the counterweight block is roughly coaxial with the center hole of the fixing ring.

10. A scroll compressor, characterized in that: The scroll compressor comprises: A frame, configured to be connected to the fixed scroll of the scroll compressor and used to support the movable scroll of the scroll compressor, wherein the frame has a receiving cavity and a thrust surface through hole communicating with the receiving cavity, wherein the thrust surface through hole is provided on a thrust surface of the frame supporting the movable scroll; A driving shaft, the driving shaft passes through the frame and through the thrust surface through hole to drive the movable scroll to translate and rotate relative to the fixed scroll; A balancing weight is arranged on the drive shaft and is constructed to provide a reverse centrifugal force or centrifugal torque to balance the dynamic unbalance generated by the eccentric shaft section of the drive shaft. The balancing weight is specifically the balancing weight described in any one of claims 1 to 9.

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