Balancing block of scroll compressor and scroll compressor comprising the balancing block
By using a finned structure made of damping material in the balance block of the scroll compressor, the dynamic imbalance problem of the scroll compressor was solved, and vibration and noise were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- COPELAND CLIMATE TECN (SUZHOU) CO LTD
- Filing Date
- 2021-09-29
- Publication Date
- 2026-06-16
Smart Images
Figure CN115875266B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of compressors, and more particularly to a balance block for a scroll compressor. Background Technology
[0002] The content in this section provides only background information related to this disclosure and may not constitute prior art.
[0003] A scroll compressor typically comprises a compression mechanism consisting of a stationary scroll component and a moving scroll component. The moving scroll component is supported by a main bearing housing / thrust plate to provide axial restraint and rotates translationally relative to the stationary scroll component under the drive of an eccentric component, such as an eccentric shaft. During operation of the scroll compressor, the centrifugal force or torque generated by the rotation of the eccentric component causes vibration of the compressor. Counterweights are typically placed on the rotating components, such as the rotor, to provide a counter-centrifugal force or torque to balance the dynamic imbalance generated by the eccentric component.
[0004] The balance blocks of existing scroll compressors are typically made of zinc-aluminum alloy or copper alloy and are mounted on the rotor to minimize the dynamic imbalance of the compressor's shaft system. However, the balancing effect of existing scroll compressor balance blocks may not be ideal, and they cannot completely eliminate the dynamic imbalance of the compressor's shaft system. Therefore, during the operation of the scroll compressor, especially when the vibration frequency of the compressor's shaft system is close to its natural frequency, the shaft system will generate significant vibration and noise.
[0005] Therefore, there is a need for an improved balance block for scroll compressors that can optimize the dynamic balance of the scroll compressor's shaft system while acting as a damping shock absorber, thereby reducing the vibration and noise of the scroll compressor. Summary of the Invention
[0006] This section provides a general summary of the invention, rather than a full disclosure of the invention's complete scope or all its features.
[0007] The purpose of this invention is to solve one or more of the technical problems mentioned above. For example, the technical solution of this invention can provide an improved balance block for a scroll compressor, which optimizes the dynamic balance of the scroll compressor's shaft system while also acting as a damping vibration absorber to reduce the vibration amplitude of the shaft system, thereby reducing the vibration and noise of the scroll compressor during operation.
[0008] To address one or more of the technical problems mentioned above, according to one aspect of the present invention, a balance block for a scroll compressor is provided. The balance block includes: a mounting base and a counterweight portion. The mounting base is adapted to be fixed to a corresponding component of the scroll compressor to achieve the installation of the balance block. The counterweight portion extends from the mounting base and is adapted to provide eccentric counterweight. The counterweight portion includes a counterweight body portion and a finned structure portion, and the finned structure portion includes one or more fins having a predetermined natural frequency and capable of deforming at resonance to absorb vibration.
[0009] In the aforementioned balance block, the fin structure also includes a mounting end, and the fin is constructed as a cantilevered fin extending from the mounting end in a generally circumferential or radial direction.
[0010] In the aforementioned balance block, the mounting end includes a first circumferential end and a second circumferential end opposite to the first circumferential end, and the fins are a plurality of fins spaced apart in the axial direction. All of the fins extend from the first circumferential end to the adjacent second circumferential end, or all of the fins extend from the second circumferential end to the adjacent first circumferential end, or some of the fins extend from the first circumferential end to the adjacent second circumferential end while the remaining fins extend from the second circumferential end to the adjacent first circumferential end.
[0011] In the aforementioned balance block, the mounting end includes a first circumferential end and a second circumferential end opposite to the first circumferential end, and the fins include a first fin extending from the first circumferential end toward the second circumferential end and a second fin extending from the second circumferential end toward the first circumferential end, the axial position of the first fin being substantially aligned with the axial position of the second fin and a gap being defined between the free ends of the first fin and the free ends of the second fin.
[0012] In the aforementioned balance block, the gap between the free end of the first fin and the free end of the second fin is located at the middle position of the counterweight in the circumferential direction.
[0013] In the aforementioned balance block, the fin structure has a plurality of fin layers spaced apart in the axial direction. Each fin layer includes a first fin and a second fin, and the circumferential positions of the gaps between the plurality of fin layers are aligned with each other, or the circumferential positions of the gaps between the plurality of fin layers are staggered.
[0014] In the aforementioned counterweight block, the fin structure and the counterweight body are either integrally formed or separately formed.
[0015] In the aforementioned balance block, when the fin structure and the counterweight body are formed separately, the fin structure itself is either integrally formed or formed separately.
[0016] In the aforementioned balance block, the counterweight is configured such that the counterweight body is close to the mounting base in the axial direction while the fin structure is far away from the mounting base in the axial direction.
[0017] In the aforementioned balance block, the fin structure is made of damping material, or only the fins in the fin structure are made of damping material, wherein the damping material is selected from: manganese copper alloy, magnesium zirconium alloy, ferromagnetic Fe-Ga based high damping alloy, high manganese damping alloy, and Fe-Mn based damping alloy.
[0018] In the aforementioned balance block, the fin structure includes multiple fins, and the multiple fins have different inherent frequencies.
[0019] In the aforementioned balance block, the fin structure also includes a mounting end, which includes a first circumferential end and a second circumferential end opposite to the first circumferential end. The fin is a non-cantilever fin extending from the first circumferential end to the second circumferential end, and a weight block is provided on the non-cantilever fin.
[0020] According to another aspect of the invention, a scroll compressor is also provided, which includes the balance block as described above.
[0021] In the above-mentioned compressor, the scroll compressor also includes a moving scroll, a rotating shaft and a rotor. The shaft system of the scroll compressor, including the moving scroll, rotating shaft, rotor and balance block, has multiple different natural frequencies. The scroll compressor includes at least two balance blocks, and the fins of the fin structure of each balance block have different natural frequencies to match one of the multiple different natural frequencies of the shaft system.
[0022] According to another aspect of the present invention, a counterweight for a scroll compressor is provided. The counterweight includes a mounting base and a counterweight portion. The mounting base is adapted to be fixed to a corresponding component of the scroll compressor to achieve mounting of the counterweight. The counterweight portion extends from the mounting base and is adapted to provide eccentric counterweight. The counterweight portion includes a counterweight body portion and a finned structure portion, and the finned structure portion includes one or more fins. The finned structure portion is made of a damping material, or only the fins in the finned structure portion are made of a damping material.
[0023] In the above-mentioned balance block, the damping material is selected from: manganese copper alloy, magnesium zirconium alloy, ferromagnetic Fe-Ga based high damping alloy, high manganese damping alloy, and Fe-Mn based damping alloy.
[0024] The advantages of the balance block of the scroll compressor according to the present invention are as follows. In the balance block of the scroll compressor according to the present invention, a finned structure is provided on the balance block, and at least the fins of the finned structure are made of a damping material, so that the balance block has a natural frequency close to the natural frequency of the shaft system of the scroll compressor. When the scroll compressor is running, since the natural frequency of the balance block is close to the natural frequency of the shaft system, when the vibration frequency of the scroll compressor is close to the natural frequency of the shaft system, the fins of the balance block can resonate, thereby generating micro-deformation and consuming the energy that excites the vibration of the shaft system, thereby reducing the vibration amplitude of the shaft system of the scroll compressor and reducing noise. Attached Figure Description
[0025] The following figures illustrate the technical features of one or more embodiments of the balance block of the scroll compressor of the present invention, in which:
[0026] Figure 1 This is a perspective view of a rotating assembly of a scroll compressor including a balance block according to a first embodiment of the present invention;
[0027] Figure 2 This is a perspective view of a scroll compressor including a balance block according to a first embodiment of the invention, shown from another angle.
[0028] Figure 3 This is a perspective view showing the balance block of a scroll compressor according to a first embodiment of the present invention;
[0029] Figure 4 This is a rear view showing the balance block of a scroll compressor according to a first embodiment of the present invention, wherein the fin structure portion on the counterweight portion of the balance block is shown.
[0030] Figure 5 and Figure 6 This is a perspective view showing the balance block of the scroll compressor according to the second embodiment of the present invention from different angles;
[0031] Figure 7 and Figure 8 This is an exploded perspective view of the balance block of the scroll compressor according to the third embodiment of the present invention, shown from different angles;
[0032] Figure 9 and Figure 10 This is an exploded perspective view of the balance block of the scroll compressor according to the fourth embodiment of the present invention, shown from different angles.
[0033] Figure 11 and Figure 12 This is an exploded perspective view of the balance block of the scroll compressor according to the fifth embodiment of the present invention, shown from different angles; and
[0034] Figure 13 and Figure 14 This is an exploded perspective view of the balance block of the scroll compressor according to the sixth embodiment of the present invention, shown from different angles. Detailed Implementation
[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This detailed description is for illustrative purposes only and is not intended to limit the invention or its applications or uses.
[0036] The present invention provides a balance block for a scroll compressor, the balance block having a finned structure portion disposed on its counterweight portion, wherein at least the fins of the finned structure portion of the balance block are made of a damping material (e.g., a high-damping material), so that the balance block can act as a damping vibration absorber while optimizing the dynamic balance of the shaft system of the scroll compressor, thereby reducing the vibration amplitude of the scroll compressor and reducing the noise of the scroll compressor during operation.
[0037] In the following, the general structure and working principle of the balance block of the scroll compressor according to various embodiments of the present invention are described in summary with reference to the various views in the accompanying drawings.
[0038] Figure 1 and Figure 2 This is a perspective view of a scroll compressor, including a balancing block according to the invention, viewed from different angles.
[0039] like Figure 1 and Figure 2 As shown, the rotating assembly 1 of the scroll compressor includes a rotor 20, a rotating shaft 30, and two counterweights 10 disposed at both ends of the rotor 20. The rotating assembly 1 and the moving scroll (not shown) together form a shaft system. During operation of the scroll compressor, the rotating shaft 30, for example an eccentric shaft, drives the moving scroll of the scroll compressor to rotate relative to the stationary scroll component in a translational motion. At this time, the centrifugal force or centrifugal torque generated by the rotation of the rotating shaft 30 causes vibration of the scroll compressor. In this case, the two counterweights 10, which are mounted to the end faces of the rotor 20 by screws or rivets, can provide a counter-centrifugal force or centrifugal torque to balance the imbalance generated by the rotating shaft. In particular, the two counterweights 10 have a finned structure to provide better vibration absorption and noise reduction, which will be described in more detail below with reference to the accompanying drawings.
[0040] Figure 3 This is a perspective view showing the balance block of a scroll compressor according to a first embodiment of the present invention, and Figure 4 This is a rear view showing the balance block of a scroll compressor according to a first embodiment of the present invention, wherein the finned structure of the counterweight portion of the balance block is shown. Figure 3As shown, the counterweight 10 of the scroll compressor according to the first embodiment includes a mounting base 11 and a counterweight portion 12 extending axially from a first radial side 111 of the mounting base 11. The mounting base 11 is adapted to be fixed to a corresponding component of the scroll compressor, such as a rotor, to achieve the mounting of the counterweight 10, while the counterweight portion 12 is adapted to provide eccentric counterweight. The counterweight portion 12 includes a counterweight body portion 121 located at the lower part and a fin structure portion 122 disposed above the counterweight body portion 121, that is, the counterweight body portion is close to the mounting base 11 in the axial direction and the fin structure portion 122 is away from the mounting base 11 in the axial direction. In this embodiment, the counterweight body portion 121 and the fin structure portion 122 are integral. The fin structure portion 122 also includes a first circumferential end portion 122a as a mounting end portion for mounting fins and a second circumferential end portion 122b opposite to the first circumferential end portion 122a. Figure 3 and Figure 4 As shown, the fin structure 122 includes three fin layers extending in the circumferential direction of the counterweight 12 and spaced apart from each other in the direction of the longitudinal axis X of the balance block 10. Each fin layer includes a first fin extending from a first circumferential end 122a of the fin structure 122 and a second fin extending from a second circumferential end 122b of the fin structure 122. The axial positions of the first fin and the second fin of each fin layer are substantially aligned, and a gap is defined between the free ends of the first fin and the second fin to form a cantilever structure. In this embodiment, the lengths of the first and second fins in the circumferential direction of each fin layer are equal, such that the gap between the free ends of the first and second fins is located at the middle position of the counterweight in the circumferential direction. Each fin of the finned structure 122 can be made of a damping material, or alternatively, the entire finned structure 122 can be made of a damping material; and the counterweight body 121 can be made of a non-damping material, such as a zinc-aluminum alloy or a copper alloy. Damping materials can include, for example, manganese-copper alloys, manganese-zirconium alloys, ferromagnetic Fe-Ga-based high-damping alloys, high-manganese damping alloys, and Fe-Mn-based damping alloys. Furthermore, the length and thickness of the first and second fins in each fin layer can be adjusted to change the M (mass) and K (stiffness) values of each fin, thereby changing the natural frequency of each fin. Therefore, each fin can be considered an individual vibration absorber with a predetermined natural frequency, and can deform at resonance to absorb vibrations, thereby reducing the vibration amplitude of the shaft system. For example, as shown in the figure, the length and thickness of each fin of the balance block in the first embodiment are the same, therefore their natural frequencies are the same.
[0041] The working principle and advantageous effects of the balance block of the scroll compressor according to the first embodiment of the present invention will be described below. When the scroll compressor is in operation, since the balance block cannot completely eliminate the dynamic imbalance of the shaft system, the shaft system of the scroll compressor will vibrate when excited. Furthermore, when the vibration frequency of the shaft system approaches its natural frequency (first or second natural frequency), the shaft system will resonate, resulting in a significant increase in vibration amplitude and generating considerable noise. The balance block according to the first embodiment has fins made of damping material, and the fins can have a predetermined natural frequency, thereby acting as a damping vibration absorber while optimizing the dynamic balance of the scroll compressor's shaft system. Moreover, the natural frequency of the fins can be changed by adjusting the length and thickness of the fins, so that the natural frequency of each fin approaches the natural frequency of the shaft system (first or second natural frequency). Therefore, when using the balance block according to the first embodiment, during the operation of the scroll compressor, when the vibration frequency of the shaft system approaches its natural frequency (first-order natural frequency or second-order natural frequency), the fins of the balance block resonate and produce micro-deformation, which dissipates the vibration energy of the shaft system, thereby reducing the vibration amplitude of the shaft system, thereby reducing the vibration of the scroll compressor and reducing noise.
[0042] Figure 5 and Figure 6 The balance block of a scroll compressor according to a second embodiment of the present invention is shown. It should be noted that the main difference between the balance block according to the second embodiment and the balance block according to the first embodiment lies in the structure of the fins, while the structures of other parts are basically the same. Therefore, the structure of the fins of the balance block according to the second embodiment will be described in detail below, while the other parts will only be briefly described.
[0043] Figure 5 and Figure 6This is a perspective view showing the counterweight of the scroll compressor according to a second embodiment of the present invention from different angles. As shown, the counterweight portion 22 of the counterweight 20 according to the second embodiment includes a counterweight body portion 221 and a fin structure portion 222. The fin structure portion 222 includes three fins that extend along the circumferential direction of the counterweight portion 22 and are spaced apart from each other in the direction of the longitudinal axis Y of the counterweight 20. The lower fin 231, which is the lowest of the three fins, extends from the first circumferential end portion 222a of the fin structure portion 222 to the second circumferential end portion 222b opposite to the first circumferential end portion 222a and extends to be adjacent to the second circumferential end portion 222b, and there is a gap between the free end of the lower fin 231 and the second circumferential end portion 222b to form a cantilever structure. The middle fin 232, one of the three fins, extends from the second circumferential end 222b of the fin structure 222 towards the first circumferential end 222a and extends adjacent to the first circumferential end 222a, with a gap between the free end of the middle fin 232 and the first circumferential end 222a to form a cantilever structure. The uppermost fin 233 extends from the first circumferential end 222a of the fin structure 222 towards the second circumferential end 222b and extends adjacent to the second circumferential end 222b, with a gap between the free end of the upper fin 233 and the second circumferential end 222b to form a cantilever structure. The lower fin 231, middle fin 232, and upper fin 233 are of equal length in the circumferential direction. The fins may be made of a damping material, or alternatively, the entire fin structure 222 may be made of a damping material. Furthermore, the length and thickness of each fin can be adjusted to change the M (mass) and K (stiffness) values of each fin, thereby altering the natural frequency of each fin. Therefore, each fin can be considered an individual vibration absorber with a predetermined natural frequency, and can deform upon resonance to absorb vibrations, thereby reducing the vibration amplitude of the shaft system. For example, as shown in the figure, the fins of the balance block in the second embodiment have the same length and thickness, and therefore the same natural frequency.
[0044] Based on the above references Figure 5 and Figure 6 The balance block of the scroll compressor according to the second embodiment of the present invention is described below. The structure of the balance block 20 according to the second embodiment is basically the same as that of the balance block 10 according to the first embodiment. The main difference is that the structures of the fins are different, that is, the lengths of the fins are different, and therefore their natural frequencies are different. Therefore, the working principle and the beneficial effects of the balance block according to the second embodiment are basically the same as those of the balance block according to the first embodiment, and will not be described in detail here.
[0045] Figure 7 and Figure 8The balance block of a scroll compressor according to a third embodiment of the present invention is shown. It should be noted that the main difference between the balance block according to the third embodiment and the balance block according to the second embodiment lies in the structure of the counterweight, while the structures of other parts are basically the same. Therefore, the structure of the counterweight of the balance block according to the third embodiment will be described in detail below, while the other parts will only be briefly described.
[0046] Figure 7 and Figure 8 This is an exploded perspective view of the counterweight of a scroll compressor according to a third embodiment of the present invention, shown from different angles. As shown, in the counterweight block 30 according to the third embodiment, the counterweight body 321 and the fin structure 322 of the counterweight portion 32 are separate. The counterweight body 321 and the fin structure 322 of the counterweight portion 32 may be provided with mounting holes for screws or rivets, so that the fin structure 322 can be assembled to the counterweight body 321 by threaded connection or riveting. The structure of the fins of the counterweight according to the third embodiment is basically the same as that of the counterweight according to the second embodiment, and therefore will not be described in detail here. Compared with the counterweight according to the second embodiment, the counterweight according to the third embodiment adopts a counterweight portion with a separate structure, thus having the additional advantage of more flexible assembly.
[0047] Figure 9 and Figure 10 The balance block of a scroll compressor according to a fourth embodiment of the present invention is shown. It should be noted that the main difference between the balance block according to the fourth embodiment and the balance block according to the first embodiment lies in the structure of the counterweight, while the structures of other parts are basically the same. Therefore, the structure of the counterweight of the balance block according to the fourth embodiment will be described in detail below, while the other parts will only be briefly described.
[0048] Figure 9 and Figure 10 This is an exploded perspective view of the counterweight block of the scroll compressor according to the fourth embodiment of the present invention, shown from different angles. As shown, in the counterweight block 40 according to the fourth embodiment, the counterweight body 421 and the fin structure 422 of the counterweight portion 42 are separate. The counterweight body 421 and the fin structure 422 may be provided with mounting holes for screws or rivets, so that the fin structure 422 can be assembled to the counterweight body 421 by threaded connection or riveting. The structure of the fins of the counterweight block according to the fourth embodiment is basically the same as that of the fins of the counterweight block according to the first embodiment, and therefore will not be described in detail here. Compared with the counterweight block according to the first embodiment, the counterweight block according to the first embodiment adopts a counterweight portion with a separate structure, thus having the additional advantage of more flexible assembly.
[0049] Figure 11 and Figure 12 The balance block of a scroll compressor according to a fifth embodiment of the present invention is shown. It should be noted that the main difference between the balance block according to the fifth embodiment and the balance block according to the third embodiment lies in the structure of the fin structure portion, while the structures of other parts are basically the same. Therefore, the structure of the fin structure portion of the balance block according to the fifth embodiment will be described in detail below, while the other parts will only be briefly described.
[0050] Figure 11 and Figure 12 This is an exploded perspective view of the counterweight block of a scroll compressor according to a fifth embodiment of the present invention, shown from different angles. As shown, the counterweight body 521 and the fin structure 522 of the counterweight portion 52 of the counterweight block 50 according to the fifth embodiment are separate, and the fin structure 522 is composed of a lower fin portion 522a, a middle fin portion 522b, and an upper fin portion 522c, which are separate from each other. The lower fin portion 522a includes a block-shaped portion as the second circumferential end of the fin structure 522 and a lower fin extending from the block-shaped portion in the circumferential direction of the counterweight portion 52. The middle fin portion 522b includes a block-shaped portion as the first circumferential end of the fin structure 522 and a middle fin extending from the block-shaped portion in the circumferential direction of the counterweight portion 52. The upper fin portion 522c is an upper fin extending in the circumferential direction of the counterweight portion 52. The lower fin portion 522a, the middle fin portion 522b, and the upper fin portion 522c may be provided with mounting holes for screws or rivets, allowing them to be assembled together by threaded connection or riveting to form the fin structure portion 522. Similarly, the counterweight body portion 521 may also be provided with mounting holes for screws or rivets, allowing the assembled fin structure portion 522 to be assembled onto the counterweight body portion 521 by threaded connection or riveting. After the fin structure portion is assembled, the structure of the fins of the counterweight according to the fifth embodiment is basically the same as that of the counterweight according to the third embodiment, and therefore will not be described in detail here. Compared to the counterweight according to the third embodiment, the fin structure portion of the counterweight according to the fifth embodiment also adopts a split structure, thus offering the additional advantage of more flexible assembly.
[0051] Figure 13 and Figure 14 The balance block of a scroll compressor according to a sixth embodiment of the present invention is shown. It should be noted that the main difference between the balance block according to the sixth embodiment and the balance block according to the fourth embodiment lies in the structure of the fin structure portion, while the structures of other parts are basically the same. Therefore, the structure of the fin structure portion of the balance block according to the sixth embodiment will be described in detail below, while the other parts will only be briefly described.
[0052] Figure 13 and Figure 14This is an exploded perspective view of the balance block of the scroll compressor according to the sixth embodiment of the present invention, shown from different angles. As shown, the counterweight body 621 and the fin structure 62 of the counterweight portion 62 of the balance block 60 according to the sixth embodiment are separate, and the fin structure 622 is composed of a lower fin layer 622a, a middle fin layer 622b, and an upper fin layer 622c, which are separate from each other. The lower fin layer 622a, the middle fin layer 622b, and the upper fin layer 622c each include a first circumferential end and a first fin integrally extending circumferentially from the first circumferential end, and a second circumferential end and a second fin integrally extending circumferentially from the second circumferential end. The lengths of the first fin and the second fin of each of the lower fin layer 622a, the middle fin layer 622b, and the upper fin layer 622c are equal in the circumferential direction. The lower fin layer 622a, middle fin layer 622b, and upper fin layer 622c may be provided with mounting holes for screws or rivets, allowing them to be assembled together by threaded connection or riveting to form the fin structure portion 622. Furthermore, the counterweight body portion 621 may also be provided with mounting holes for screws or rivets, allowing the assembled fin structure portion 622 to be assembled onto the counterweight body portion 621 by threaded connection or riveting. After the fin structure portion is assembled, the structure of the fins of the counterweight according to the sixth embodiment is basically the same as that of the counterweight according to the fourth embodiment, and therefore will not be described in detail here. Compared to the counterweight according to the fourth embodiment, the fin structure portion of the counterweight according to the sixth embodiment also adopts a split structure, thus having the additional advantage of more flexible assembly.
[0053] The following describes a scroll compressor having balance blocks according to the invention. The scroll compressor includes a shaft system consisting of a moving scroll and a rotating assembly, wherein the rotating assembly includes a rotating shaft, a rotor, and two balance blocks disposed at both ends of the rotor (see [link to relevant documentation]). Figure 1 and Figure 2The shaft system of a scroll compressor has multiple natural frequencies, for example, two natural frequencies, where the first natural frequency is 1000Hz and the second natural frequency is 2500Hz. In this case, the two balancing blocks of the scroll compressor (referred to as the first balancing block and the second balancing block, respectively) can both be finned balancing blocks according to the present invention, and the length and thickness of the fins of the first balancing block and the second balancing block can be different, so that the fins of the first balancing block and the second balancing block have different natural frequencies. For example, the natural frequency of the fins of the first balancing block is 1000Hz, while the natural frequency of the fins of the second balancing block is 2500Hz. Thus, when the vibration frequency of the shaft system of the scroll compressor is close to its first natural frequency, i.e., 1000Hz, the fins of the first balancing block can resonate, thereby producing a good vibration absorption effect; and when the vibration frequency of the shaft system of the scroll compressor is close to its second natural frequency, i.e., 2500Hz, the fins of the second balancing block can resonate, thereby producing a good vibration absorption effect. In this way, the vibration of the scroll compressor shaft system can be effectively absorbed even when the vibration frequency is close to its different natural frequencies, thereby reducing the vibration amplitude and noise of the scroll compressor.
[0054] Furthermore, it should be noted that although different technical solutions for the balance block of the scroll compressor according to the present invention have been described in the foregoing embodiments, it is understood that the technical solutions in the above embodiments are merely illustrative and not limiting, and various modifications can be made. For example, although the structure of the balance block fins in all the above embodiments includes a cantilever structure, a fin structure without a cantilever structure can be used. For example, each fin extends continuously from the first circumferential end of the fin structure to the second circumferential end without any gaps to form a non-cantilever fin; and a weight block can be provided on the non-cantilever fin. In addition, although each fin extends along the circumferential direction of the balance block in all the above embodiments, the fins can also be configured to extend along the radial direction of the balance block. In addition, although in the first embodiment the gap between the first fin and the second fin of each fin layer is located in the middle and aligned with each other, the gap can be located at any position, and the gap between the first fin and the second fin of each fin layer can be staggered, so that each fin has a different natural frequency. Furthermore, although in the second embodiment the fins are arranged alternately (i.e., the upper and lower fins extend from the first circumference to the end while the middle fin extends from the second circumference to the end), it is also possible to arrange each fin so that it extends from the first circumference to the end or from the second circumference to the end, or any fin extends from the first circumference to the end while the others extend from the second circumference to the end. Additionally, although in all the above embodiments the fin structure includes three fins (layers) spaced apart in the longitudinal axis direction of the balance block, the fin structure can also be arranged to have more or fewer fins (layers), for example, one fin (layer), two fins (layers), or four fins (layers). Furthermore, although, as described above, both balance blocks of the scroll compressor can be balance blocks with finned structures according to the present invention, it is also possible to arrange only one balance block as a balance block with finned structures according to the present invention, while the other balance block is a conventional balance block of the prior art.
[0055] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the specific embodiments described and shown herein, and various changes can be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.
Claims
1. A balance block (10, 20, 30, 40, 50, 60) for a scroll compressor, said balance block comprising: Mounting base (11) and counterweights (12, 22, 32, 42, 52, 62), the mounting base being adapted to be fixed to a corresponding component of the scroll compressor to achieve the mounting of the balance block, the counterweights extending from the mounting base and adapted to provide eccentric counterweight. The counterweight is characterized in that the counterweight part includes a counterweight body part (121, 221, 321, 421, 521, 621) and a fin structure part (122, 222, 322, 422, 522, 622), and the fin structure part includes one or more fins (231, 232, 233) having a predetermined natural frequency and capable of deforming to absorb vibrations when resonating.
2. The balance block according to claim 1, characterized in that, The fin structure also includes a mounting end, wherein the fin is constructed as a cantilevered fin extending generally in the circumferential or radial direction from the mounting end.
3. The balance block (20) according to claim 2, characterized in that: The mounting ends include a first circumferential end (122a, 222a) and a second circumferential end (122b, 222b) opposite to the first circumferential end, and The fins are a plurality of fins (231, 232, 233) spaced apart in the axial direction. All of the fins extend from the first circumferential end to a point adjacent to the second circumferential end, or all of the fins extend from the second circumferential end to a point adjacent to the first circumferential end, or some of the fins extend from the first circumferential end to a point adjacent to the second circumferential end while the remaining fins extend from the second circumferential end to a point adjacent to the first circumferential end.
4. The balance block (10) according to claim 2, characterized in that: The mounting ends include a first circumferential end (122a, 222a) and a second circumferential end (122b, 222b) opposite to the first circumferential end, and The fin includes a first fin extending from the first circumferential end toward the second circumferential end and a second fin extending from the second circumferential end toward the first circumferential end, the axial positions of the first fin and the second fin being substantially aligned and a gap being defined between the free ends of the first fin and the free ends of the second fin.
5. The balance block (10) according to claim 4, characterized in that, The gap between the free end of the first fin and the free end of the second fin is located at the middle position of the counterweight in the circumferential direction.
6. The balance block (10) according to claim 4, characterized in that: The fin structure has multiple fin layers spaced apart in the axial direction, each fin layer including the first fin and the second fin, and The circumferential positions of the gaps in each of the multiple fin layers are aligned with each other, or the circumferential positions of the gaps in each of the multiple fin layers are staggered.
7. The balance block (10, 20, 30, 40, 50, 60) according to any one of claims 2 to 6, characterized in that, The finned structure (122, 222, 322, 422, 522, 622) and the counterweight body (121, 221, 321, 421, 521, 621) are either integrally formed or separately formed.
8. The balance block (30, 40, 50, 60) according to claim 7, characterized in that, When the fin structure (322, 422, 522, 622) and the counterweight body (321, 421, 521, 621) are formed separately, the fin structure itself is either integrally formed or formed separately.
9. The balance block (10) according to any one of claims 1 to 6, characterized in that, The counterweight (12) is configured such that the counterweight body (121) is close to the mounting base (11) in the axial direction while the fin structure (122) is far away from the mounting base (11) in the axial direction.
10. The balance block according to any one of claims 1 to 6, characterized in that, The fin structure is made of a damping material, or only the fins in the fin structure are made of a damping material, wherein the damping material is selected from: manganese copper alloy, magnesium zirconium alloy, ferromagnetic Fe-Ga based high damping alloy, high manganese damping alloy, and Fe-Mn based damping alloy.
11. The balance block according to any one of claims 1 to 6, characterized in that, The fin structure includes multiple fins, and the multiple fins have different inherent frequencies.
12. The balance block according to claim 1, characterized in that: The fin structure also includes a mounting end, which comprises a first circumferential end and a second circumferential end opposite to the first circumferential end. The fin is a non-cantilever fin extending from the first circumferential end to the second circumferential end. A weight is provided on the non-cantilevered fin.
13. A scroll compressor, characterized in that, The scroll compressor includes a balance block (10, 20, 30, 40, 50, 60) according to any one of claims 1 to 12.
14. The scroll compressor according to claim 13, characterized in that: The scroll compressor further includes a moving scroll, a rotating shaft, and a rotor. The shaft system of the scroll compressor, including the moving scroll, the rotating shaft, the rotor, and the balance block (10), has multiple different natural frequencies. The scroll compressor includes at least two balance blocks, each balance block having fins in its finned structure with different natural frequencies to match one of the multiple different natural frequencies of the shaft system.
15. A balance block (10, 20, 30, 40, 50, 60) for a scroll compressor, said balance block comprising: Mounting base (11) and counterweights (12, 22, 32, 42, 52, 62), the mounting base being adapted to be fixed to a corresponding component of the scroll compressor to achieve the mounting of the balance block, the counterweights extending from the mounting base and adapted to provide eccentric counterweight. The counterweight is characterized in that the counterweight part includes a counterweight body part (121, 221, 321, 421, 521, 621) and a fin structure part (122, 222, 322, 422, 522, 622), and the fin structure part includes one or more fins, wherein the fin structure part is made of a damping material, or only the fins in the fin structure part are made of a damping material.
16. The balance block according to claim 15, characterized in that, The damping material is selected from: manganese copper alloy, magnesium zirconium alloy, ferromagnetic Fe-Ga based high damping alloy, high manganese damping alloy, and Fe-Mn based damping alloy.