CN215979909U - Balance block of scroll compressor and scroll compressor comprising balance block - Google Patents
Balance block of scroll compressor and scroll compressor comprising balance block Download PDFInfo
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- CN215979909U CN215979909U CN202122385488.2U CN202122385488U CN215979909U CN 215979909 U CN215979909 U CN 215979909U CN 202122385488 U CN202122385488 U CN 202122385488U CN 215979909 U CN215979909 U CN 215979909U
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Abstract
The utility model relates to a balance block of a scroll compressor and a scroll compressor comprising the balance block, wherein the balance block comprises: a mounting base portion adapted to be secured to a corresponding member of the scroll compressor to enable mounting of the counterweight, and a counterweight portion extending from the mounting base portion and adapted to provide an eccentric counterweight, wherein the counterweight portion includes a counterweight body portion and a fin structure portion, and the fin structure portion includes one or more fins having a predetermined natural frequency and being deformable at resonance to absorb vibration. The balance block can play a role of damping the vibration absorber while optimizing the dynamic balance of a shaft system of the scroll compressor, thereby reducing the vibration of the scroll compressor and reducing the noise.
Description
Technical Field
The present invention relates to the field of compressors, and in particular, to a balance block for a scroll compressor.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
A scroll compressor generally includes a compression mechanism composed of a fixed scroll member and a movable scroll member. The orbiting scroll member is supported by a main bearing housing/thrust plate to provide axial restraint and is driven in translational rotation relative to the non-orbiting scroll member by an eccentric member, such as an eccentric shaft. During operation of the scroll compressor, centrifugal force or centrifugal moment generated by rotation of the eccentric member may cause vibration of the compressor. Counterweights are typically provided on the rotating component, such as the rotor, to provide opposing centrifugal forces or moments to balance the amount of dynamic imbalance created by the eccentric.
The counterweights of prior art scroll compressors are typically made of zinc-aluminum alloy or copper alloy and are disposed on the rotor to minimize the amount of dynamic unbalance of the scroll compressor's shaft system. However, the balance effect of the balance weight of the existing scroll compressor may not be ideal, and the dynamic unbalance of the shaft system of the scroll compressor cannot be completely eliminated, so that the shaft system will generate large amplitude vibration and large noise during the operation of the scroll compressor, especially when the vibration frequency of the shaft system of the scroll compressor is close to the natural frequency.
Accordingly, there is a need for an improved balance mass for a scroll compressor that can function as a damping vibration absorber while optimizing the dynamic balance of the shafting of the scroll compressor, thereby reducing vibration and noise of the scroll compressor.
SUMMERY OF THE UTILITY MODEL
This summary is provided to introduce a general summary of the utility model, not a full disclosure of the full scope of the utility model or all of the features of the utility model.
The present invention is directed to solving one or more of the problems set forth above. For example, the technical scheme of the utility model can provide an improved balance block of a scroll compressor, which plays a role of damping a vibration absorber while optimizing the dynamic balance of a shaft system of the scroll compressor so as to reduce the vibration amplitude of the shaft system, thereby reducing the vibration of the scroll compressor and reducing the noise of the scroll compressor when the scroll compressor runs.
In order to solve one or more of the above-mentioned technical problems, according to an aspect of the present invention, there is provided a balance weight of a scroll compressor, the balance weight including: a mounting base portion adapted to be secured to a corresponding member of the scroll compressor to enable mounting of the counterweight, and a counterweight portion extending from the mounting base portion and adapted to provide an eccentric counterweight, wherein the counterweight portion includes a counterweight body portion and a fin structure portion, and the fin structure portion includes one or more fins having a predetermined natural frequency and being deformable at resonance to absorb vibration.
In the above-described weight, the fin structure portion further includes a mounting end portion, and the fin is configured as a cantilevered fin extending from the mounting end portion substantially in a circumferential direction or a radial direction.
In the above weight, the mounting end includes a first circumferential end and a second circumferential end opposite the first circumferential end, and the fins are a plurality of fins spaced apart in the axial direction, all of the fins extending from the first circumferential end to adjacent the second circumferential end, or all of the fins extending from the second circumferential end to adjacent the first circumferential end, or a part of the fins extending from the first circumferential end to adjacent the second circumferential end and the remaining fins extending from the second circumferential end to adjacent the first circumferential end.
In the above weight, the mounting end portion includes a first circumferential end portion and a second circumferential end portion opposite to the first circumferential end portion, and the fins include a first fin extending from the first circumferential end portion toward the second circumferential end portion and a second fin extending from the second circumferential end portion toward the first circumferential end portion, an axial position of the first fin being substantially aligned with an axial position of the second fin and a gap being defined between a free tip of the first fin and a free tip of the second fin.
In the above-described weight, the gap between the free tip of the first fin and the free tip of the second fin is located at an intermediate position of the weight portion in the circumferential direction.
In the above weight, the fin structure portion has a plurality of fin layers spaced apart in the axial direction, each of the fin layers including the first fin and the second fin, respectively, and circumferential positions of gaps of each of the plurality of fin layers are aligned with each other, or circumferential positions of gaps of each of the plurality of fin layers are staggered from each other.
In the above-described counterweight, the fin structure portion is formed integrally with or separately from the counterweight main body portion.
In the above-described counterweight, in the case where the fin structure portion is formed integrally with the counterweight main body portion, the fin structure portion itself is formed integrally or separately.
In the above-described weight, the weight portion is provided such that the weight body portion is close to the mounting base portion in the axial direction and the fin structure portion is distant from the mounting base portion in the axial direction.
In the above-described weight, the fin structure portion is a damping material portion made of a damping material, or only the fin in the fin structure portion is a damping material portion 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.
In the above weight, the fin structure portion includes a plurality of fins and the plurality of fins have different natural frequencies.
In the above weight, the fin structure portion further includes a mounting end portion including a first circumferential end portion and a second circumferential end portion opposite to the first circumferential end portion, the fin is a non-cantilevered fin extending from the first circumferential end portion to the second circumferential end portion, and a weight is provided on the non-cantilevered fin.
According to another aspect of the present invention, there is also provided a scroll compressor including a counterweight as described above.
In the above compressor, the scroll compressor further includes a movable scroll, a rotary shaft, and a rotor, a shaft system of the scroll compressor including the movable scroll, the rotary shaft, the rotor, and the balance blocks has a plurality of different natural frequencies, and the scroll compressor includes at least two balance blocks, fins of the fin structure portion of each balance block have mutually different natural frequencies to respectively match with a corresponding one of the plurality of different natural frequencies of the shaft system.
According to still another aspect of the present invention, there is provided a balance weight of a scroll compressor, the balance weight including: a mounting base portion adapted to be fixed to a corresponding member of the scroll compressor to enable mounting of the counterweight, and a counterweight portion extending from the mounting base portion and adapted to provide an eccentric counterweight, wherein the counterweight portion includes a counterweight body portion and a fin structure portion, and the fin structure portion includes one or more fins, wherein the fin structure portion is a damping material portion made of a damping material, or only the fins in the fin structure portion are damping material portions made of a damping material.
In the above weight, 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.
The balance weight of the scroll compressor according to the present invention is advantageous, for example, as follows. In the balance weight of the scroll compressor according to the present invention, the fin structure portion is provided on the balance weight, and at least the fin of the fin structure portion of the balance weight is made of a damping material so that the balance weight has a natural frequency close to a natural frequency of a shaft system of the scroll compressor. When the scroll compressor is operated, because the natural frequency of the balance block is close to the natural frequency of the shafting, when the vibration frequency of the scroll compressor is close to the natural frequency of the shafting, the fins of the balance block can generate resonance, thereby generating micro deformation and consuming the energy for exciting the vibration of the shafting, thereby reducing the vibration amplitude of the shafting of the scroll compressor and reducing the noise.
Drawings
The technical features of one or more embodiments of the balance mass of the scroll compressor of the present invention are illustrated in the accompanying drawings, in which:
FIG. 1 is a perspective view of a rotating assembly of a scroll compressor including a counterweight according to a first embodiment of the present invention;
FIG. 2 is a perspective view of a rotating assembly of a scroll compressor shown from another angle including a counterweight according to the first embodiment of the present invention;
fig. 3 is a perspective view illustrating a balance weight of a scroll compressor according to a first embodiment of the present invention;
FIG. 4 is a rear view showing the balance mass of the scroll compressor according to the first embodiment of the present invention, wherein the fin structure portion on the weight portion of the balance mass is shown;
fig. 5 and 6 are perspective views illustrating a balance weight of a scroll compressor according to a second embodiment of the present invention from different angles;
fig. 7 and 8 are exploded perspective views illustrating a balance weight of a scroll compressor according to a third embodiment of the present invention from different angles;
fig. 9 and 10 are exploded perspective views illustrating a balance weight of a scroll compressor according to a fourth embodiment of the present invention from different angles;
FIGS. 11 and 12 are exploded isometric views showing the counterweight of a scroll compressor according to a fifth embodiment of the present invention from different angles; and
fig. 13 and 14 are exploded perspective views illustrating a balance weight of a scroll compressor according to a sixth embodiment of the present invention from different angles.
Detailed Description
The utility model is described in detail below with the aid of specific embodiments with reference to the attached drawings. The following detailed description of the utility model is merely for purposes of illustration and is in no way intended to limit the utility model, its application, or uses.
The utility model provides a balance block of a scroll compressor, which is provided with a fin structure part arranged on the balance block part, wherein at least the fin of the fin structure part of the balance block is made of damping materials (such as high damping materials), so that the balance block can play a role of damping a vibration absorber while optimizing the dynamic balance of a shaft system of the scroll compressor, thereby reducing the vibration amplitude of the scroll compressor and reducing the noise of the scroll compressor when the scroll compressor runs.
Hereinafter, the overall configuration and operation principle of a balance weight of a scroll compressor according to various embodiments of the present invention will be described in brief with reference to various views of the drawings.
FIGS. 1 and 2 are perspective views of a rotary assembly of a scroll compressor including a counterweight according to the present invention, viewed from different angles.
As shown in fig. 1 and 2, a rotating assembly 1 of a scroll compressor includes a rotor 20, a rotating shaft 30, and two balance weights 10 provided on both ends of the rotor 20. The rotating assembly 1 and the orbiting scroll (not shown) of the scroll compressor together constitute a shaft system. When the scroll compressor is operated, the rotating shaft 30, which is, for example, an eccentric shaft, drives the orbiting scroll of the scroll compressor to perform a translational rotation with respect to the non-orbiting scroll member. At this time, the centrifugal force or the centrifugal moment generated by the rotation of the rotary shaft 30 causes the vibration of the scroll compressor. In this case, the two balance weights 10, which are assembled to the end surface of the rotor 20 by means of screws or rivets, may provide an opposite centrifugal force or centrifugal moment to balance the unbalance amount generated by the rotation shaft. In particular, the two weights 10 have a finned structure to provide better shock absorption and noise reduction, as will be described in more detail below with reference to the accompanying drawings.
Fig. 3 is a perspective view illustrating a balance weight of a scroll compressor according to a first embodiment of the present invention, and fig. 4 is a rear view illustrating the balance weight of the scroll compressor according to the first embodiment of the present invention, in which a fin structure portion of a weight portion of the balance weight is illustrated. As shown in fig. 3, the counterweight 10 of the scroll compressor according to the first embodiment includes a mounting base portion 11 and a weight portion 12 axially extending from a first radial side portion 111 of the mounting base portion 11. The mounting base 11 is adapted to be secured to a corresponding component of the scroll compressor, such as a rotor, to enable mounting of the counterweight 10, while the counterweight 12 is adapted to provide an eccentric counterweight. The weight portion 12 includes a weight body portion 121 located at a lower portion and a fin structure portion 122 provided above the weight body portion 121, that is, the weight body portion is close to the mount base 11 in the axial direction and the fin structure portion 122 is distant from the mount base 11 in the axial direction. In this embodiment, the weight body portion 121 and the fin structure portion 122 are integrated. The fin structure portion 122 further includes a first circumferential end portion 122a as a mounting end portion for mounting the fin and a second circumferential end portion 122b opposite to the first circumferential end portion 122 a. As shown in fig. 3 and 4, the fin structure portion 122 includes three fin layers extending in the circumferential direction of the weight portion 12 and spaced from each other in the direction of the longitudinal axis X of the weight 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 position of a first fin of each fin layer is substantially aligned with the axial position of a second fin and a gap is defined between the free end of the first fin and the free end of the second fin to form a cantilevered structure. In this embodiment, the first fin and the second fin of each fin layer are equal in length in the circumferential direction such that a gap between a free tip of the first fin and a free tip of the second fin is located at an intermediate position of the weight portion in the circumferential direction. Each fin of the fin structure 122 may be made of a damping material, or alternatively, the entire fin structure 122 may be made of a damping material; also, the weight body portion 121 may be made of a non-damping material, for example, a zinc-aluminum alloy or a copper alloy. The damping material may include, for example, a manganin alloy, a manganese zirconium alloy, a ferromagnetic type Fe-Ga-based high damping alloy, a high manganese damping alloy, a Fe-Mn-based damping alloy, and the like. Also, the lengths and thicknesses of the first and second fins of each fin layer may be adjusted to change the M (mass) value and the K (stiffness) value of each fin, thereby changing the natural frequency of each fin. Therefore, each fin can be regarded as an individual vibration absorber having a predetermined natural frequency, and can generate a deformation at the time of resonance to play a role of absorbing vibration, thereby reducing the vibration amplitude of the shafting. For example, as shown, the length and thickness of each fin of the weight of the first embodiment are the same, and therefore the natural frequencies are the same.
The operation principle and advantageous effects of the balance weight of the scroll compressor according to the first embodiment of the present invention will be described below. When the scroll compressor is in an operating state, the balance block cannot completely eliminate the dynamic unbalance of the shafting, so the shafting of the scroll compressor can vibrate when being excited, and when the vibration frequency of the shafting is close to the natural frequency (first-order natural frequency or second-order natural frequency) of the shafting, the shafting can resonate, so that the vibration amplitude is obviously increased, and the generated noise is larger. The balance weight according to the first embodiment has the fins made of the damping material, and the fins may have a predetermined natural frequency, thereby being able to function as a damping vibration absorber while optimizing the dynamic balance of the shaft system of the scroll compressor. Also, 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 is close to the natural frequency of the shaft system (first order natural frequency or second order natural frequency). Therefore, in the case of using the balance weight according to the first embodiment, when the vibration frequency of the shaft system is close to its natural frequency (first order natural frequency or second order natural frequency) during the operation of the scroll compressor, the fins of the balance weight resonate and are slightly deformed, dissipating the vibration energy of the excitation shaft system, and thus it is possible to reduce the vibration amplitude of the shaft system, thereby reducing the vibration of the scroll compressor and reducing the noise.
Fig. 5 and 6 show a balance weight of a scroll compressor according to a second embodiment of the present invention. It is to be noted that the weight according to the second embodiment is mainly different from the weight according to the first embodiment in the structure of the fins, and the structures of the other portions are substantially the same, so the structure of the fins of the weight according to the second embodiment will be described in detail hereinafter, and the other portions will be described only briefly.
Fig. 5 and 6 are perspective views illustrating a balance weight of a scroll compressor according to a second embodiment of the present invention from different angles. As shown in the drawings, the weight portion 22 of the weight 20 according to the second embodiment includes a weight body portion 221 and a fin structure portion 222. The fin structure portion 222 includes three fins extending in the circumferential direction of the weight portion 22 and spaced from each other in the direction of the longitudinal axis Y of the weight 20. A lower fin 231 located at the lowermost portion of the three fins extends from a first circumferential end 222a of the fin structure portion 222 to a second circumferential end 222b opposite to the first circumferential end 222a and extends so as to be adjacent to the second circumferential end 222b, and a gap exists between a free tip of the lower fin 231 and the second circumferential end 222b to constitute a cantilever structure. The middle fin 232, which is located in the middle of the three fins, extends from the second circumferential end 222b to the first circumferential end 222a of the fin structure portion 222 and extends to be adjacent to the first circumferential end 222a, and a gap exists between the free tip of the middle fin 232 and the first circumferential end 222a to constitute a cantilever structure. The uppermost upper fin 233 of the three fins extends from the first circumferential end 222a to the second circumferential end 222b of the fin structure portion 222 and extends to be adjacent to the second circumferential end 222b, and a gap exists between the free tip of the upper fin 233 and the second circumferential end 222b to constitute a cantilever structure. The lower fin 231, the middle fin 232, and the upper fin 233 are equal in 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. Also, the length and thickness of each fin may 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 regarded as an individual vibration absorber having a predetermined natural frequency, and can generate a deformation at the time of resonance to play a role of absorbing vibration, thereby reducing the vibration amplitude of the shafting. For example, as shown, the length and thickness of each fin of the weight of the second embodiment are the same, and therefore the natural frequencies are the same.
According to the balance weight of the scroll compressor according to the second embodiment of the present invention described above with reference to fig. 5 and 6, the structure of the balance weight 20 according to the second embodiment is substantially the same as that of the balance weight 10 according to the first embodiment, and the main difference is that the structures of the fins are different, that is, the lengths of the fins are different, and thus the natural frequencies thereof are different. Therefore, the working principle and the advantageous effects of the weight according to the second embodiment are substantially the same as those of the weight according to the first embodiment, and will not be described in detail here.
Fig. 7 and 8 show a balance weight of a scroll compressor according to a third embodiment of the present invention. It is to be noted that the balance weight according to the third embodiment is mainly different from the balance weight according to the second embodiment in the structure of the weight portion, and the structures of other portions are substantially the same, so the structure of the weight portion of the balance weight according to the third embodiment will be described in detail hereinafter, and the other portions will be described only briefly.
Fig. 7 and 8 are exploded perspective views illustrating a balance weight of a scroll compressor according to a third embodiment of the present invention from different angles. As shown in the drawings, the weight body portion 321 of the weight portion 32 of the counterweight 30 according to the third embodiment is separate from the fin structure portion 322. The weight body portion 321 and the fin structure portion 322 of the weight portion 32 may be provided with fitting holes for screws or rivets, so that the fin structure portion 322 may be fitted to the weight body portion 321 by screwing or riveting. The structure of the fin of the weight according to the third embodiment is substantially the same as that of the fin of the weight according to the second embodiment, and therefore, will not be described in detail here. The weight according to the third embodiment employs the weight portion having a separate structure, compared to the weight according to the second embodiment, and thus has an additional advantage of more flexible assembly.
Fig. 9 and 10 show a balance weight of a scroll compressor according to a fourth embodiment of the present invention. It is to be noted that the weight according to the fourth embodiment is mainly different from the weight according to the first embodiment in the structure of the weight portion, and the structures of other portions are substantially the same, so the structure of the weight portion of the weight according to the fourth embodiment will be described in detail hereinafter, and the other portions will be described only briefly.
Fig. 9 and 10 are exploded perspective views illustrating a balance weight of a scroll compressor according to a fourth embodiment of the present invention from different angles. As shown in the drawing, the weight body portion 421 of the weight portion 42 of the counterweight 40 according to the fourth embodiment is separate from the fin structure portion 422. The weight body portion 421 and the fin structure portion 422 may be provided with fitting holes for screws or rivets, so that the fin structure portion 422 may be fitted to the weight body portion 421 by screwing or riveting. The structure of the fin of the weight according to the fourth embodiment is substantially the same as that of the fin of the weight according to the first embodiment, and therefore, will not be described in detail here. The weight according to the first embodiment employs the weight portion having a separate structure, compared to the weight according to the first embodiment, and thus has an additional advantage of more flexible assembly.
FIGS. 11 and 12 show a balance block of a scroll compressor according to a fifth embodiment of the present invention. It is to be noted that the weight according to the fifth embodiment is mainly different from the weight according to the third embodiment in the structure of the fin structure portion, and the structures of the other portions are substantially the same, so the structure of the fin structure portion of the weight according to the fifth embodiment will be described in detail hereinafter, and the other portions will be described only briefly.
FIGS. 11 and 12 are exploded perspective views showing the balance weight of a scroll compressor according to a fifth embodiment of the present invention from different angles. As shown in the drawing, the weight main body portion 521 of the weight portion 52 of the counterweight 50 according to the fifth embodiment is separate from the fin structure portion 522, and the fin structure portion 522 is constituted by 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 portion as a second circumferential end portion of the fin structure portion 522 and a lower fin extending from the block portion in the circumferential direction of the weight portion 52. The middle fin portion 522b includes a block portion as a first circumferential end portion of the fin structure portion 522 and a middle fin extending from the block portion in the circumferential direction of the weight portion 52. The upper fin portion 522c is an upper fin extending in the circumferential direction of the weight portion 52. The lower fin portion 522a, the middle fin portion 522b, and the upper fin portion 522c may be provided with fitting holes for screws or rivets so that they may be fitted together by screwing or riveting to form the fin structure portion 522, and the weight body portion 521 may also be provided with fitting holes for screws or rivets so that the fitted fin structure portion 522 may be fitted to the weight body portion 521 by screwing or riveting. After the assembly of the fin structure portion is completed, the structure of the fin of the weight according to the fifth embodiment is substantially the same as that of the fin of the weight according to the third embodiment, and therefore, will not be described in detail here. The fin structure portion of the weight according to the fifth embodiment also adopts a split structure, compared to the weight according to the third embodiment, and therefore has an additional advantage of more flexible assembly.
Fig. 13 and 14 show a balance weight of a scroll compressor according to a sixth embodiment of the present invention. It is to be noted that the weight according to the sixth embodiment is mainly different from the weight according to the fourth embodiment in the structure of the fin structure portion, and the structures of the other portions are substantially the same, so the structure of the fin structure portion of the weight according to the sixth embodiment will be described in detail hereinafter, and the other portions will be described only briefly.
Fig. 13 and 14 are exploded perspective views illustrating a balance weight of a scroll compressor according to a sixth embodiment of the present invention from different angles. As shown in the drawing, the weight body portion 621 of the weight portion 62 of the weight 60 according to the sixth embodiment is separate from the fin structure portion 622, and the fin structure portion 622 is constituted by 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 extending integrally circumferentially from the first circumferential end, and a second circumferential end and a second fin extending integrally circumferentially from the second circumferential end. The first fins and the second fins of the lower fin layer 622a, the middle fin layer 622b, and the upper fin layer 622c are equal in length in the circumferential direction. The lower fin layer 622a, the middle fin layer 622b, and the upper fin layer 622c may be provided thereon with fitting holes for screws or rivets so that they may be fitted together by screwing or riveting to form the fin structure portion 622. Also, the weight body portion 621 may be provided with a fitting hole for a screw or a rivet so that the assembled fin structure portion 622 can be fitted to the weight body portion 621 by screwing or riveting. After the assembly of the fin structure portion is completed, the structure of the fin of the weight according to the sixth embodiment is substantially the same as that of the fin of the weight according to the fourth embodiment, and therefore, will not be described in detail here. Compared with the weight according to the fourth embodiment, the fin structure portion of the weight according to the sixth embodiment also adopts a split structure, and thus has an additional advantage of more flexible assembly.
A scroll compressor having a balance weight according to the present invention is described below. The scroll compressor includes a shaft system composed of an orbiting scroll and a rotating assembly including a rotating shaft, a rotor, and two balance weights provided at both ends of the rotor (see fig. 1 and 2). The scroll compressor shaft system has multiple natural frequencies, such as two natural frequencies, with a first order natural frequency of 1000Hz and a second order natural frequency of 2500 Hz. In this case, the two balance masses (referred to as a first balance mass and a second balance mass, respectively) of the scroll compressor may be both balance masses having fins according to the present invention, and the length and thickness of the fins of the first balance mass and the second balance mass may be different so that the fins of the first balance mass and the second balance mass have different natural frequencies. For example, the natural frequencies of the fins of the first weight are all 1000Hz, and the natural frequencies of the fins of the second weight are all 2500 Hz. Thus, when the vibration frequency of the shafting of the scroll compressor is close to the first order natural frequency, namely 1000Hz, the fins of the first balance block can generate resonance, so that good vibration absorption effect is generated, and when the vibration frequency of the shafting of the scroll compressor is close to the second order natural frequency, namely 2500Hz, the fins of the second balance block can generate resonance, so that good vibration absorption effect is generated. Therefore, the vibration frequency of the shafting of the scroll compressor is close to different natural frequencies, and good vibration absorption effect can be generated on the vibration of the shafting, so that the vibration amplitude of the scroll compressor is reduced, and the noise is reduced.
Furthermore, it is noted that while various aspects of the counterweight of the scroll compressor according to the present invention have been described in the foregoing embodiments, it is to be understood that the aspects of the embodiments described above are merely illustrative and not restrictive, and that various modifications may be adopted. For example, although in the above respective embodiments, the structures of the fins of the weight each include the cantilever structure, a structure of the fins that does not include the cantilever structure may be employed, for example, each fin continuously extends from the first circumferential end portion to the second circumferential end portion of the fin structure portion without any gap to form a non-cantilevered fin; also, a weighted mass may be provided on the non-cantilevered fin. In addition, although in each of the above embodiments, each of the fins extends in the circumferential direction of the weight, the fins may be provided so as to extend in the radial direction of the weight. In addition, although in the first embodiment, the gaps of the first fins and the second fins of each fin layer are located at intermediate positions and aligned with each other, the gaps may be located at any positions, and the gaps of the first fins and the second fins of the respective fin layers may be staggered from each other so that each fin has a different natural frequency. In addition, although in the second embodiment, the fins are arranged alternately (i.e., the upper and lower fins extend from the first circumferential end portion and the middle fin extends from the second circumferential end portion), it may be arranged such that each of the fins extends from the first circumferential end portion or the second circumferential end portion, or any of the fins extends from the first circumferential end portion and the other fins extend from the second circumferential end portion. In addition, although in each of the above embodiments, the fin structures each include three fins (layers) spaced apart in the longitudinal axis direction of the weight, the fin structure may be provided with more or fewer fins (layers), for example, one fin (layer), two fins (layers), or four fins (layers). In addition, although both the balance weights of the scroll compressor may be the balance weight having the fin structure according to the present invention as described above, it may be arranged such that only one balance weight is the balance weight having the fin structure according to the present invention and the other balance weight is a common balance weight of the related art.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the utility model is not limited to the specific embodiments described and illustrated in detail herein, and that various changes may be made therein by those skilled in the art without departing from the scope of the utility model as defined by the appended claims.
Claims (16)
1. A balance block for a scroll compressor, the balance block comprising:
a mounting base adapted to be secured to a corresponding member of the scroll compressor to effect mounting of the counterweight, and a counterweight extending from the mounting base and adapted to provide an eccentric counterweight,
characterized in that the weight portion includes a weight body portion and a fin structure portion, and the fin structure portion includes one or more fins having a predetermined natural frequency and being deformable at resonance to absorb vibration.
2. The weight of claim 1, wherein the fin structure further includes a mounting end, the fin configured as a cantilevered fin extending from the mounting end generally in a circumferential or radial direction.
3. A weight according to claim 2, wherein:
the mounting end includes a first circumferential end and a second circumferential end opposite the first circumferential end, an
The fins are a plurality of fins spaced apart in the axial direction, all of the fins extending from the first circumferential end to adjacent the second circumferential end, or all of the fins extending from the second circumferential end to adjacent the first circumferential end, or some of the fins extending from the first circumferential end to adjacent the second circumferential end and the remainder extending from the second circumferential end to adjacent the first circumferential end.
4. A weight according to claim 2, wherein:
the mounting end includes a first circumferential end and a second circumferential end opposite the first circumferential end, an
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, an axial position of the first fin being generally aligned with an axial position of the second fin and a gap being defined between a free tip of the first fin and a free tip of the second fin.
5. The weight according to claim 4, wherein a gap between a free tip of the first fin and a free tip of the second fin is located at an intermediate position of the weight portion in a circumferential direction.
6. The weight of claim 4, wherein:
the fin structure portion has a plurality of fin layers spaced apart in an axial direction, each fin layer including the first fin and the second fin, respectively, an
The circumferential positions of the gaps of each of the plurality of fin layers are aligned with each other, or the circumferential positions of the gaps of each of the plurality of fin layers are staggered from each other.
7. The weight according to any one of claims 2 to 6, wherein the fin structure portion is formed integrally or separately from the weight body portion.
8. The weight according to claim 7, wherein in a case where the fin structure portion is formed separately from the weight body portion, the fin structure portion itself is integrally formed or separately formed.
9. The weight block according to any one of claims 1 to 6, wherein the weight portion is disposed such that the weight body portion is close to the mounting base portion in an axial direction and the fin structure portion is distant from the mounting base portion in an axial direction.
10. The weight according to any one of claims 1 to 6, wherein the fin structure portion is a damping material portion made of a damping material, or only the fin is a damping material portion made of a damping material in the fin structure portion, 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 weight according to any one of claims 1 to 6, wherein the fin structure portion includes a plurality of fins and the plurality of fins have different natural frequencies.
12. A weight according to claim 1, wherein:
the fin structure further includes a mounting end including a first circumferential end and a second circumferential end opposite the first circumferential end, the fin being a non-cantilevered fin extending from the first circumferential end to the second circumferential end, and
and a weighting block is arranged on the non-cantilever type fin.
13. A scroll compressor, characterized in that it comprises a counterweight according to any one of claims 1 to 12.
14. The scroll compressor of claim 13, wherein:
the scroll compressor further comprises an orbiting scroll, a rotating shaft and a rotor, wherein a shaft system of the scroll compressor including the orbiting scroll, the rotating shaft, the rotor and the balance weight has a plurality of different natural frequencies, and
the scroll compressor includes at least two of the balance blocks, and the fins of the fin structure portion of each balance block have mutually different natural frequencies to respectively match with a corresponding one of a plurality of different natural frequencies of the shaft system.
15. A balance block for a scroll compressor, the balance block comprising:
a mounting base adapted to be secured to a corresponding member of the scroll compressor to effect mounting of the counterweight, and a counterweight extending from the mounting base and adapted to provide an eccentric counterweight,
characterized in that the weight portion includes a weight body portion and a fin structure portion, and the fin structure portion includes one or more fins, wherein the fin structure portion is a damping material portion made of a damping material, or only the fins are damping material portions made of a damping material in the fin structure portion.
16. The weight of claim 15, wherein the damping material is selected from the group consisting of: manganese-copper alloy, magnesium-zirconium alloy, ferromagnetic Fe-Ga-based high damping alloy, high manganese damping alloy and Fe-Mn-based damping alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122385488.2U CN215979909U (en) | 2021-09-29 | 2021-09-29 | Balance block of scroll compressor and scroll compressor comprising balance block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122385488.2U CN215979909U (en) | 2021-09-29 | 2021-09-29 | Balance block of scroll compressor and scroll compressor comprising balance block |
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| CN215979909U true CN215979909U (en) | 2022-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024094109A1 (en) * | 2022-11-02 | 2024-05-10 | 比泽尔制冷技术（中国）有限公司 | Scroll compressor and method for assembling scroll compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024094109A1 (en) * | 2022-11-02 | 2024-05-10 | 比泽尔制冷技术（中国）有限公司 | Scroll compressor and method for assembling scroll compressor |
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