CN118057023A - Dynamic vibration absorber, compressor and refrigerating and heating equipment - Google Patents
Dynamic vibration absorber, compressor and refrigerating and heating equipment Download PDFInfo
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- CN118057023A CN118057023A CN202211444246.9A CN202211444246A CN118057023A CN 118057023 A CN118057023 A CN 118057023A CN 202211444246 A CN202211444246 A CN 202211444246A CN 118057023 A CN118057023 A CN 118057023A
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 66
- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 230000035939 shock Effects 0.000 claims description 40
- 238000004080 punching Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 19
- 230000009467 reduction Effects 0.000 description 19
- 238000010521 absorption reaction Methods 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000005316 response function Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0044—Pulsation and noise damping means with vibration damping supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application provides a dynamic vibration absorber, a compressor and refrigerating and heating equipment. The dynamic vibration absorber includes: the vibration absorbing structures comprise mass blocks and cantilevers for supporting the mass blocks, the mass blocks are integrally formed at one ends of the corresponding cantilevers, and each cantilever has elasticity; and one end of each cantilever far away from the mass block is connected with the supporting part. According to the dynamic vibration absorber provided by the application, the mass block is integrally formed at one end of the cantilever, the other end of the cantilever is connected with the supporting part, and the cantilever has elasticity, so that when the supporting part is arranged on an object to be vibration-isolated, the vibration of the object to be vibration-isolated can be transmitted to the cantilever and the mass block, the mass block can vibrate to absorb the vibration energy of the object to be vibration-isolated, the vibration of the object to be vibration-isolated is reduced, and the mass block with corresponding mass and the cantilever with corresponding length and width can be arranged on the supporting part according to the vibration frequency range of the object to be vibration-isolated, so that the vibration of the corresponding frequency range is actively reduced, and the vibration absorbing effect is better.
Description
Technical Field
The application belongs to the technical field of compressors, and particularly relates to a dynamic damper, a compressor and refrigerating and heating equipment.
Background
Home appliances such as refrigerators have been put into thousands of households, become one of the necessary home appliances for living, and along with the continuous pursuit of living standards, the requirements for noise vibration of the home appliances are also increasing. In the related art, a motor and a compression mechanism are installed in a casing of a compressor, and the motor drives the compression mechanism (such as a pump body) to operate so as to compress gas. In the running process of the compressor, vibration is inevitably generated, and the service life of the compressor is influenced and noise is generated by the vibration. Current compressors typically employ vibration absorption or isolation methods to reduce compressor vibration, such as by applying vibration-proof glue, providing vibration-isolation pads, and the like. However, these measures all belong to the category of passive vibration damping technology, and the vibration damping effect is poor.
Disclosure of Invention
The embodiment of the application aims to provide a dynamic vibration absorber, a compressor and refrigerating and heating equipment, so as to solve the problems of large limitation of vibration reduction effect and poor vibration reduction effect caused by the fact that a passive vibration reduction structure is used for the compressor in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows: there is provided a dynamic vibration absorber comprising:
the vibration absorbing structure comprises a mass block and a cantilever for supporting the mass block, wherein the mass block is integrally formed at one end corresponding to the cantilever, and each cantilever has elasticity;
And one end of each cantilever far away from the mass block is connected with the supporting part.
In an alternative embodiment, one ends of the plurality of cantilevers, which are far away from the mass, are connected to form an intermediate plate, and the support part is provided on the intermediate plate.
In an alternative embodiment, a plurality of the cantilevers are distributed on the peripheral side of the intermediate plate.
In an alternative embodiment, the supporting portion is a protruding portion formed by protruding a middle portion of the middle plate to one side, or the supporting portion is a column member fixed to the middle plate.
In an alternative embodiment, the cantilever arms of the shock absorbing structure are arranged to tilt towards one side of the intermediate plate.
In an alternative embodiment, the shock absorbing structure is a plate-like structure formed by punching a plate.
In an alternative embodiment, the distance between the center of gravity of the mass and the central axis of the supporting part is D, the width of the cantilever is H, and the length of the cantilever is L, so that 0.6H+L.ltoreq.D.ltoreq.1.8H+L.
In an alternative embodiment, the mass is circular, and the radius of the mass is R, then d=r+l.
In an alternative embodiment, the length L of the cantilever ranges from 10mm to 40mm; and/or the width H of the cantilever ranges from 5mm to 20mm.
In an alternative embodiment, the shock absorbing structure has a thickness T in the range of 0.5mm to 3mm.
In an alternative embodiment, a plurality of said shock absorbing structures are arranged rotationally symmetrically about a central axis of said support.
In an alternative embodiment, the mass is circular, elliptical or polygonal.
In an alternative embodiment, a portion of the cantilever has a length that is inconsistent with the length of the remaining cantilevers; and/or, the width of part of the cantilevers is inconsistent with the width of the rest of the cantilevers; and/or, the thickness of part of the cantilever is inconsistent with the thickness of the rest of the cantilever; and/or the mass of part of the mass blocks is inconsistent with the mass of the rest of the mass blocks.
In an alternative embodiment, the length of the support protruding from the cantilever is greater than the amplitude of vibration of the mass along the length of the support.
It is a further object of an embodiment of the present application to provide a compressor comprising a housing having a dynamic vibration absorber as in any of the embodiments above mounted thereon.
It is a further object of an embodiment of the present application to provide a refrigeration and heating apparatus comprising a base plate and a compressor as in any of the above embodiments.
The dynamic vibration absorber provided by the embodiment of the application has the beneficial effects that: compared with the prior art, the dynamic vibration absorber has the advantages that the mass block is integrally formed at one end of the cantilever, the other end of the cantilever is connected with the supporting part, and the cantilever has elasticity, so that when the supporting part is arranged on an object to be vibration-isolated, the vibration of the object to be vibration-isolated can be conducted to the cantilever and the mass block, the mass block can absorb the vibration energy of the object to be vibration-isolated, the vibration of the object to be vibration-isolated is reduced, the mass block with corresponding mass and the cantilever with corresponding length and width can be arranged on the supporting part according to the vibration frequency range of the object to be vibration-isolated, the vibration of the corresponding frequency range can be actively reduced, and the vibration-isolating effect is better.
The compressor provided by the embodiment of the application has the beneficial effects that: compared with the prior art, the compressor provided by the embodiment of the application uses the dynamic vibration absorber, has the technical effect of the dynamic vibration absorber, and can actively reduce the vibration in a specific frequency range of the compressor so as to reduce vibration and noise.
The refrigerating and heating equipment provided by the embodiment of the application has the beneficial effects that: compared with the prior art, the refrigerating and heating equipment provided by the embodiment of the application uses the compressor provided by the embodiment, and has small vibration and noise during operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or exemplary technical descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic perspective view of a dynamic vibration absorber according to a first embodiment of the present application;
FIG. 2 is a schematic side view of a dynamic vibration absorber according to a first embodiment of the present application;
Fig. 3 is a schematic structural diagram of a shock absorbing structure according to a first embodiment of the present application;
FIG. 4 is a schematic front view of a dynamic vibration absorber according to a first embodiment of the present application;
fig. 5 is a schematic front view of a dynamic vibration absorber according to a second embodiment of the present application;
FIG. 6 is a graph of frequency response function of a flat panel mounted dynamic vibration absorber in accordance with a second embodiment of the present application.
FIG. 7 is a schematic front view of a dynamic vibration absorber according to a third embodiment of the present application;
FIG. 8 is a schematic front view of a dynamic vibration absorber according to a fourth embodiment of the present application;
FIG. 9 is a schematic perspective view of a dynamic vibration absorber according to a fifth embodiment of the present application;
fig. 10 is a schematic structural view of a part of a structure of a compressor according to an embodiment of the present application.
Wherein, each reference numeral in the figure mainly marks:
10-dynamic vibration absorber;
11-a shock absorbing structure; 111-cantilever; 112-mass; 113-an intermediate plate; 12-a support; 120-central axis; 121-a pillar; 122-a protrusion;
21-a casing.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments in any suitable manner.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In describing embodiments of the present application, the term "adjacent" refers to being in close proximity unless explicitly stated and defined otherwise. For example, for the three components a 1、A2 and B, the distance between a 1 and B is greater than the distance between a 2 and B, then a 2 is closer to B than a 1, i.e., a 2 is adjacent to B, which can be said to be adjacent to a 2. For another example, when there are multiple C parts, each C part being C 1、C2……CN, when one of the C parts, such as C 2, is closer to the B part than the other C parts, then B is adjacent to C 2, also known as C 2 is adjacent to B.
Referring to fig. 1-4, a dynamic vibration absorber 10 provided in accordance with the present application will now be described. The dynamic vibration absorber 10 includes a support portion 12 and a plurality of vibration absorbing structures 11, each vibration absorbing structure 11 being connected to the support portion 12 to support each vibration absorbing structure 11 through the support portion 12. When the vibration isolator is used, the support 12 is connected with the to-be-isolated object so as to connect each vibration absorbing structure 11 with the to-be-isolated object to absorb the vibration energy of the to-be-isolated object and reduce the vibration of the to-be-isolated object, thereby reducing the vibration and the noise of the to-be-isolated object.
Each of the vibration absorbing structures 11 includes a mass 112 and a cantilever 111, the mass 112 being located at one end of the cantilever 111, the other end of the cantilever 111 being connected to the support 12 so as to support the mass 112 on the support 12 through the cantilever 111, and the mass 112 being suspended when the support 12 is mounted on the object to be vibration-isolated. The cantilever 111 has elasticity, so that the supporting portion 12 is mounted on the object to be vibration-isolated, when the object to be vibration-isolated vibrates, the vibration energy can be transmitted to the cantilever 111 through the supporting portion 12, and then transmitted to the mass block 112 through the cantilever 111, so as to drive the mass block 112 to swing and vibrate, and thus the vibration energy of the object to be vibration-isolated is absorbed, so that vibration of the object to be vibration-isolated is damped.
Because the vibration absorbing structure 11 formed by the mass block 112 and the cantilever 111 can well absorb the vibration in a specific frequency range, the vibration absorbing structure 11 formed by the specific mass block 112 and the cantilever 111 can be arranged according to the vibration frequency of the object to be vibration isolated, so that the vibration in the corresponding frequency range of the object to be vibration isolated can be actively reduced, and the noise reduction effect of the object to be vibration isolated can be improved.
The mass block 112 is integrally formed on the corresponding cantilever 111, so that the connection strength of the mass block 112 and the cantilever 111 can be protected, and the mass block 112 can well absorb vibration.
In addition, the plurality of vibration absorbing structures 11 are arranged, so that the plurality of vibration absorbing structures 11 can absorb vibration in different frequency ranges respectively, vibration reduction is carried out in a frequency range with stronger vibration of the object to be vibration-isolated, the vibration reduction effect is improved, and multimodal vibration reduction is realized.
Compared with the prior art, in the dynamic vibration absorber 10 provided by the embodiment of the application, the mass block 112 is integrally formed at one end of the cantilever 111, the other end of the cantilever 111 is connected with the supporting part 12, and the cantilever 111 has elasticity, so that when the supporting part 12 is arranged on an object to be vibration-isolated, the vibration of the object to be vibration-isolated can be transmitted to the cantilever 111 and the mass block 112, so that the mass block 112 can vibrate to absorb the vibration energy of the object to be vibration-isolated, the vibration of the object to be vibration-isolated is reduced, and the mass block 112 with corresponding mass and the cantilever 111 with corresponding length and width can be arranged on the supporting part 12 according to the vibration frequency range of the object to be vibration-isolated, so that the vibration of the corresponding frequency range is actively reduced, and the vibration-isolating effect is better.
In one embodiment, referring to fig. 1 to 4, a plurality of cantilevers 111 are connected at one end far from the corresponding mass 112 and form an intermediate plate 113, that is, the mass 112 is disposed at one end of the cantilevers 111, the other ends of the cantilevers 111 are connected to form the intermediate plate 113, and the supporting portion 12 is disposed on the intermediate plate 113, so that the supporting portion 12 may be disposed and each cantilever 111 may be more stably supported, thereby supporting each mass 112.
In one embodiment, the plurality of cantilevers 111 are distributed on the periphery of the middle plate 113, so that the plurality of mass blocks 112 can be distributed on the periphery of the middle plate 113, and when each cantilever 111 and the mass block 112 thereon vibrate to absorb vibration, the stress on the periphery of the supporting portion 12 can be more balanced, so that the structural strength of the dynamic vibration absorber 10 can be better ensured, and the dynamic vibration absorber 10 can stably perform vibration absorption.
In one embodiment, referring to fig. 1 to 4, the plurality of vibration absorbing structures 11 are rotationally symmetrically arranged about the central axis 120 of the support portion 12, that is, one vibration absorbing structure 11 on one side of the support portion 12 is rotationally symmetrically arranged with respect to the vibration absorbing structure 11 on the opposite side of the support portion 12, that is, the cantilever 111 of one vibration absorbing structure 11a is rotationally symmetrically arranged with the cantilever 111 of the other vibration absorbing structure 11b for two vibration absorbing structures 11 on the opposite sides of the support portion 12, and the mass 112 of one vibration absorbing structure 11a is rotationally symmetrically arranged with the mass 112 of the other vibration absorbing structure 11 b. This structure makes it possible to more uniformly stress the peripheral side of the support portion 12. The central axis 120 of the support 12 is also the central axis of the intermediate plate 113.
In one embodiment, the length of the cantilever 111 protruding from the supporting portion 12 is greater than the vibration amplitude of the mass block 112 along the length direction of the supporting portion 12, so that the mass block 112 and the cantilever 111 can not touch the object to be vibration-isolated during the swinging vibration when the supporting portion 12 is installed on the object to be vibration-isolated, so as to improve the vibration-isolating effect.
Referring to fig. 1 to 4, for the vibration absorbing structure 11, when the length of the cantilever 111 is changed, the position of the mass block 112 to the supporting portion 12 is changed, so that the natural frequency of the vibration absorbing structure 11 can be changed, that is, the natural frequency range of vibration absorption of the dynamic vibration absorber 10 can be changed, so that the natural frequency of vibration absorption of the vibration absorbing structure 11 is adjusted to be within the vibration frequency range of the object to be vibration-isolated, and the vibration-isolating effect of the object to be vibration isolated is improved.
For the vibration absorbing structure 11, when the width of the cantilever 111 is changed, the elasticity of the whole cantilever 111 is changed, and then the vibration amplitude of the mass block 112 is changed, so that the natural frequency of the vibration absorbing structure 11, that is, the natural frequency range of vibration absorption of the dynamic vibration absorber 10 is changed, so that the natural frequency of vibration absorption of the vibration absorbing structure 11 is adjusted to be within the vibration frequency range of the object to be vibration-isolated, and the vibration-isolated effect of the object to be vibration isolated is improved.
For the vibration absorbing structure 11, when the thickness of the cantilever 111 is changed, the elasticity of the whole cantilever 111 is changed, and then the vibration amplitude of the mass block 112 is changed, so that the natural frequency of the vibration absorbing structure 11, that is, the natural frequency range of vibration absorption of the dynamic vibration absorber 10 is changed, so that the natural frequency of vibration absorption of the vibration absorbing structure 11 is adjusted to be within the vibration frequency range of the object to be vibration-isolated, and the vibration-isolated effect of the object to be vibration isolated is improved.
For the vibration absorbing structure 11, when the mass of the mass block 112 is changed, the natural frequency range of the vibration absorbing structure 11 may be changed, that is, the natural frequency of the dynamic vibration absorber 10 for vibration reduction may be changed, so as to adjust the natural frequency of the vibration absorbing structure 11 to the vibration frequency range of the object to be vibration-isolated, so as to improve the vibration-isolating effect of the object to be vibration-isolated.
In one embodiment, the lengths of the partial cantilevers 111 are not identical to those of the rest cantilevers 111 among the plurality of shock-absorbing structures 11, so that the natural frequency of the vibration reduction of the partial shock-absorbing structures 11 can be made different from the natural frequency of the vibration reduction of the rest shock-absorbing structures 11 in order to damp vibrations in different frequency range sections.
In one embodiment, the width of a part of the cantilever 111 is not identical to the width of the rest of the cantilever 111 among the plurality of vibration absorbing structures 11, so that the natural frequency of vibration reduction of the part of the vibration absorbing structures 11 may be different from the natural frequency of vibration reduction of the rest of the vibration absorbing structures 11, so as to damp vibrations in different frequency range sections.
In one embodiment, the thickness of a part of the cantilever 111 is not identical to that of the rest of the cantilever 111 among the plurality of vibration absorbing structures 11, so that the natural frequency of vibration reduction of the part of the vibration absorbing structures 11 can be made different from that of vibration reduction of the rest of the vibration absorbing structures 11, so as to reduce vibrations in different frequency range sections.
In one embodiment, the mass of the partial mass 112 is not identical to the mass of the rest mass 112 in the plurality of vibration absorbing structures 11, so that the natural frequency of vibration reduction of the partial vibration absorbing structures 11 can be made different from the natural frequency of vibration reduction of the rest vibration absorbing structures 11 in order to damp vibrations in different frequency range sections.
In one embodiment, the area of the mass 112 may be varied to vary the mass of the mass 112. Of course, the mass of the mass 112 may also be varied by varying the thickness of the mass 112.
In one embodiment, the support 12 is a column 121 fixed to the middle plate 113, that is, the support 12 is in a column shape, such as a column having a circular cross section, a square column having a square cross section, or the like. The columnar piece 121 is used as the supporting part 12, so that the structural strength and the length of the supporting column can be conveniently adjusted, and the supporting column is further installed and used. When the columnar member 121 is used for the support portion 12, the support portion 12 may be manufactured separately and welded to the intermediate plate 113. Of course, the support portion 12 may be fixed to the middle plate 113 by other means, such as riveting, screwing, etc.
In one embodiment, the shock absorbing structure 11 is a plate structure formed by punching a plate, that is, the shock absorbing structure 11 is formed by punching a plate, so as to facilitate processing and manufacture, and ensure stable connection between the mass block 112 and the cantilever 111. The shock absorbing structure 11 may be die cut from sheet metal. Of course, the shock absorbing structure 11 may be made by punching a plate made of other materials. It will be appreciated that the shock absorbing structure 11 may also be manufactured using stamping.
In one embodiment, the plurality of connected shock absorbing structures 11 may be formed by punching a plate member, so that the manufacturing of the dynamic vibration absorber 10 may be facilitated and the connection strength of the plurality of shock absorbing structures 11 may be ensured. It will be appreciated that the plurality of shock absorbing structures 11 may also be manufactured separately and then fixedly connected.
In one embodiment, the cantilever 111 of the vibration absorbing structure 11 may be tilted toward one side of the middle plate 113, so as to avoid touching the object to be vibration-isolated when the mass 112 and the cantilever 111 vibrate in a swinging manner when the supporting portion 12 is mounted on the object to be vibration-isolated. The cantilever 111 may be bent and tilted toward a side of the middle plate 113 facing away from the support 12. Of course, the cantilever 111 may be bent and tilted toward the side of the middle plate 113 where the support 12 is located. The mass 112 and the cantilever 111 can be oscillated without touching the object to be vibration-isolated. It will be appreciated that the cantilever 111 may be a flat plate structure for easy manufacture, and after installation, it is determined whether the cantilever 111 is bent and tilted according to the installation position.
In one embodiment, the distance from the center of gravity of the mass 112 to the central axis 120 of the support 12 is D, the width of the cantilever 111 is H, and the length of the cantilever 111 is L, 0.6H+L.ltoreq.D.ltoreq.1.8H+L. This ensures that the mass 112 is not too large relative to the cantilever 111, which prevents the amplitude of the mass 112 from being too large when the mass 112 vibrates, and ensures that the shock absorbing structure 11 has a good damping effect. And when D is set smaller, e.g., less than 0.6h+l, the mass 112 is less vibration absorbing. When D is set too large, e.g., greater than 1.8h+l, the mass 112 is too large relative to the cantilever 111, which may result in an excessive amplitude of the mass 112 and a reduced shock absorbing capacity.
In one embodiment, the mass 112 is circular, such that the center of gravity of the mass 112 is the center of the circle, and the radius of the mass 112 is R, such that d=r+l, and R ranges from 0.6H to 1.8H, that is, 0.6H R1.8H.
In one embodiment, the length L of the cantilever 111 may range from 10mm to 40mm, e.g., L may be 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, etc., to ensure that the length L of the cantilever 111 is reasonably sized to avoid too small a length of the cantilever 111, e.g., less than 10mm, resulting in a relatively weak shock absorbing performance of the mass 112 on the cantilever 111. While the length L of the cantilever 111 is too large, e.g. greater than 40mm, on the one hand the size of the dynamic vibration absorber 10 is too large, and on the other hand it is convenient to cause the amplitude of the mass 112 to be too large, resulting in a reduced shock absorbing capacity.
In one embodiment, the width H of the cantilever 111 ranges from 5mm to 20mm, for example, H may be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc., to ensure that the width H of the cantilever 111 is reasonably arranged and to protect the shock absorbing structure 11 with good shock absorbing effect. When the cantilever 111 width H is too small, e.g., less than 5mm, it is necessary to set the mass of the mass 112 on the cantilever 111 smaller, and the mass of the mass 112 on the cantilever 111 is too small, resulting in weaker vibration absorbing performance of the vibration absorbing structure 11. However, too large a width H of the cantilever 111, for example, greater than 20mm, may cause difficulty in driving the cantilever 111 to vibrate by the mass 112, resulting in a decrease in vibration absorbing capability.
In one embodiment, the thickness T of the shock absorbing structure 11 ranges from 0.5mm to 3mm, e.g., T may be 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, etc., to ensure good elasticity of the cantilever 111, facilitate vibration absorption of the mass 112, and ensure a vibration absorbing effect. When the thickness T of the shock absorbing structure 11 is too large, for example, greater than 3mm, it is difficult for the mass 112 to vibrate the cantilever 111, resulting in a decrease in shock absorbing capability. When the thickness T of the shock absorbing structure 11 is too small, the strength of the cantilever 111 is small, and the vibration absorbing capability of the mass block 112 is weak.
The vibration absorbing structure 11 having the same parameters as the length of the cantilever 111, the width of the cantilever 111, the mass of the mass block 112, etc. is defined as a vibration absorbing structure 11 of one type of parameter, and the natural frequencies of the vibration absorbing structures 11 of the same type of parameter are the same or similar.
In one embodiment, the supporting portion 12 may be provided with a vibration absorbing structure 11 with various parameter types, and specifically, may be set according to a range where a frequency peak point of vibration reduction is required. As in the present embodiment, four parameter types of vibration absorbing structures 11 are provided on the support portion 12, and two vibration absorbing structures 11 of the same parameter type are symmetrically provided. Of course, in some embodiments, one parameter type of shock absorbing structure 11 may be provided. It should be understood that the number of parameters of the shock absorbing structure 11 connected to the supporting portion 12 may be three, five, etc., which is not limited herein.
In one embodiment, the parameters of the shock absorbing structures 11 on the support 12 differ less, that is, the mass differences between the plurality of masses 112 are relatively small. The length difference between the plurality of cantilevers 111 is small. The difference in width between the plurality of cantilevers 111 is small. In this way, the natural frequencies of the vibration absorbing structures 11 are relatively close to each other, and thus the plurality of vibration absorbing structures 11 can be coupled to each other to absorb vibration in a relatively wide frequency range.
Referring to fig. 5, a front view of a dynamic vibration absorber 10 according to a second embodiment of the present application is shown. The dynamic vibration absorber 10 of the present embodiment differs from the dynamic vibration absorber 10 of the embodiment shown in fig. 4 in that: in the present embodiment, the parameters of the four vibration absorbing structures 11 are greatly different, that is, the mass difference between the plurality of masses 112 is relatively large. The length difference between the plurality of cantilevers 111 is large. The width difference between the plurality of cantilevers 111 is large. In this way, the natural frequencies of the vibration absorbing structures 11 are far apart, so that the vibration absorbing structures 11 can absorb vibration in a plurality of setting frequency bands.
Referring to fig. 5, and table 1 below, table 1 shows the length L of the cantilever 111, the width H of the cantilever 111, and the radius R of the mass block 112 corresponding to the four parameter type vibration absorbing structures 11 in fig. 5, and the first order natural frequency of each vibration absorbing structure 11, wherein the thickness T of the vibration absorbing structure 11 is 1mm.
TABLE 1
In table 1, the natural frequency represents the first order natural frequency of the vibration absorbing structure 11 under the same line size parameter, for example, the first order natural frequency of the vibration absorbing structure 11 with the cantilever 111 length L of 29.9mm and the cantilever width H of 12mm, and the mass 112 radius R of 24mm is 198Hz. The cantilever 111 has a length L of 21.1mm and a width H of 5.4mm, and the first order natural frequency of the shock absorbing structure 11 having a mass 112 radius R of 7mm is 724Hz. The cantilever 111 has a length L of 17.2mm and a width H of 4.2mm, and the first order natural frequency of the shock absorbing structure 11 with a mass 112 radius R of 5mm is 1204Hz. The cantilever 111 has a length L of 13.4mm and a width H of 9.7mm, and the first order natural frequency of the shock absorbing structure 11 having a mass 112 radius R of 8mm is 1694Hz.
Referring to fig. 6, fig. 6 is a graph of frequency response functions before and after setting the dynamic vibration absorber 10 corresponding to the parameters in table 1 on a flat plate, wherein the horizontal axis is marked as frequency, and the vertical axis is amplitude, and it can be seen from the graph that after the dynamic vibration absorber 10 is installed, the peak value of the frequency response function is greatly weakened in four target frequency ranges, so that good vibration reduction is achieved.
Referring to fig. 7, a front view of a dynamic vibration absorber 10 is provided according to a third embodiment of the present application. The dynamic vibration absorber 10 of the present embodiment differs from the dynamic vibration absorber 10 of the embodiment shown in fig. 5 in that: in the present embodiment, the mass blocks 112c of one vibration absorbing structure 11c are arranged in a polygonal shape, the mass blocks 112d of one vibration absorbing structure 11d are arranged in a circular shape, and the mass blocks 112e of one vibration absorbing structure 11e are arranged in an elliptical shape. That is, the shape of the mass 112 of each shock absorbing structure 11 may be set differently. It will be appreciated that the shape of the mass 112 of a portion of the shock absorbing structure 11 may also be different from the remaining masses 112.
In one embodiment, the mass blocks 112 of each shock absorbing structure 11 may be arranged in a polygonal shape. Of course, the mass blocks 112 of the shock absorbing structures 11 may be each provided in an elliptical shape or a circular shape. And are not limited in this regard.
In one embodiment, the shock-absorbing structures 11 are in three pairs, two shock-absorbing structures 11 in each pair being rotationally symmetrically arranged about the central axis 120 of the support 12. The three pairs of shock absorbing structures 11 are different in parameter model.
Referring to fig. 8, a front view of a dynamic vibration absorber 10 is provided according to a fourth embodiment of the present application. The dynamic vibration absorber 10 of the present embodiment differs from the dynamic vibration absorber 10 of the embodiment shown in fig. 4 in that: in this embodiment, a plurality of shock absorbing structures 11 are disposed on the peripheral side of the supporting portion 12, and the size parameters of the shock absorbing structures 11 are different. In this way, when the overall occupied volume of the dynamic vibration absorber 10 is ensured to be similar, the vibration absorbing structure 11 with more parameter types can be arranged to be matched with vibration in a larger frequency range to perform good vibration reduction.
Referring to fig. 9, a perspective view of a dynamic vibration absorber 10 according to a fifth embodiment of the present application is shown. The dynamic vibration absorber 10 of the present embodiment differs from the dynamic vibration absorber 10 of the embodiment shown in fig. 1 in that: in this embodiment, the supporting portion 12 is a protruding portion 122 protruding from the middle portion of the middle plate 113, that is, the middle portion of the middle plate 113 is protruding to form the protruding portion 122, and the protruding portion 122 is used as the supporting portion 12, so that the structure is more convenient to manufacture, and the connection strength between the supporting portion 12 and the middle plate 113 can be ensured.
In one embodiment, dynamic vibration absorber 10 is formed by die-cutting a plate member, that is, a plate member is used to form intermediate plate 113, each cantilever 111, each mass 112, and support 12, which is more convenient to manufacture.
In one embodiment, the intermediate plate 113 is configured in a circular shape so that the position of each cantilever 111 is configured in a layout so that the stress on the circumferential side of the support 12 is more balanced.
According to the dynamic vibration absorber 10 provided by the embodiment of the application, the mass block 112 with specific mass and the corresponding cantilever 111 can be arranged according to the vibration frequency of the object to be vibration-isolated so as to actively damp the vibration of the object to be vibration-isolated in a specific vibration frequency range. The dynamic vibration absorber 10 of the embodiment of the application can be applied to vibration absorption of a compressor, and also can be applied to vibration absorption of other equipment, such as motor vibration absorption, pump vibration absorption and the like.
Referring to fig. 10, an embodiment of the present application further provides a compressor. Referring also to fig. 1, the compressor includes a housing 21, and the dynamic vibration absorber 10 according to any one of the embodiments is mounted on the housing 21. The compressor, using the dynamic vibration reducer 10 of the above embodiment, has the technical effect of the dynamic vibration reducer 10, and can actively reduce vibration in a specific frequency range of the compressor, so as to reduce vibration and noise.
At the time of assembly, the support portion 12 may be fixedly connected to the inner surface of the casing 21 by welding, screwing, caulking or the like to damp vibration of the compressor. Of course, at the time of assembly, the support portion 12 may be fixedly connected to the outer surface of the casing 21 by welding, screwing, caulking or the like to damp the compressor.
In one embodiment, when the dynamic vibration reducer 10 is mounted on the inner surface of the casing 21, the cantilever 111 of the vibration absorbing structure 11 may be bent so that the mass 112 does not touch the casing 21 and the internal components of the compressor when vibrating, thereby better reducing vibration, improving vibration and noise.
The compressor of the embodiments of the present application may be a rotary compressor, a reciprocating piston compressor, a scroll compressor, or the like.
The embodiment of the application also provides a refrigerating and heating device. The refrigerating and heating equipment comprises the compressor according to any embodiment. The refrigerating and heating equipment uses the compressor of the embodiment, has the technical effect of the compressor, and has small vibration and noise during operation.
The refrigerating and heating equipment of the embodiment of the application can be refrigerating equipment, such as a refrigerator and an air conditioner, heating equipment, and cooling and heating equipment.
The above description is illustrative of the various embodiments of the application and is not intended to be limiting, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (16)
1. A dynamic vibration absorber, comprising:
the vibration absorbing structure comprises a mass block and a cantilever for supporting the mass block, wherein the mass block is integrally formed at one end corresponding to the cantilever, and each cantilever has elasticity;
And one end of each cantilever far away from the mass block is connected with the supporting part.
2. The dynamic vibration absorber as claimed in claim 1, wherein: and one ends of the cantilevers, which are far away from the mass block, are connected to form an intermediate plate, and the supporting parts are arranged on the intermediate plate.
3. The dynamic vibration absorber as claimed in claim 2, wherein: the plurality of cantilevers are distributed on the peripheral side of the intermediate plate.
4. The dynamic vibration absorber as claimed in claim 2, wherein: the supporting part is a protruding part formed by protruding the middle part of the middle plate to one side, or is a columnar piece fixed on the middle plate.
5. The dynamic vibration absorber as claimed in claim 2, wherein: the cantilever of the shock absorbing structure is arranged to be tilted towards one side of the middle plate.
6. The dynamic vibration absorber according to any one of claims 1-5, wherein: the vibration absorbing structure is a plate-shaped structure formed by punching plates.
7. The dynamic vibration absorber as claimed in claim 6, wherein: the distance from the gravity center of the mass block to the central axis of the supporting part is D, the width of the cantilever is H, and the length of the cantilever is L, so that D is more than or equal to 0.6H+L and less than or equal to 1.8H+L.
8. The dynamic vibration absorber according to claim 7, wherein: the mass block is circular, the radius of the mass block is R, and D=R+L.
9. The dynamic vibration absorber according to claim 7, wherein: the length L of the cantilever ranges from 10mm to 40mm; and/or the width H of the cantilever ranges from 5mm to 20mm.
10. The dynamic vibration absorber as claimed in claim 6, wherein: the thickness T of the shock absorbing structure ranges from 0.5mm to 3mm.
11. The dynamic vibration absorber according to any one of claims 1-5, wherein: the plurality of shock absorbing structures are rotationally symmetrically arranged about a central axis of the support portion.
12. The dynamic vibration absorber according to any one of claims 1-5, wherein: the mass block is round, oval or polygonal.
13. The dynamic vibration absorber according to any one of claims 1-5, wherein: the length of part of the cantilever is inconsistent with the lengths of the rest of the cantilevers; and/or, the width of part of the cantilevers is inconsistent with the width of the rest of the cantilevers; and/or, the thickness of part of the cantilever is inconsistent with the thickness of the rest of the cantilever; and/or the mass of part of the mass blocks is inconsistent with the mass of the rest of the mass blocks.
14. The dynamic vibration absorber according to any one of claims 1-5, wherein: the length of the supporting part protruding out of the cantilever is larger than the vibration amplitude of the mass block along the length direction of the supporting part.
15. A compressor comprising a housing, characterized in that: the dynamic vibration absorber according to any one of claims 1 to 14, being mounted on said housing.
16. A refrigeration and heating apparatus, characterized in that: further comprising the compressor of claim 15.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN202211444246.9A CN118057023A (en) | 2022-11-18 | 2022-11-18 | Dynamic vibration absorber, compressor and refrigerating and heating equipment |
PCT/CN2023/123603 WO2024104001A1 (en) | 2022-11-18 | 2023-10-09 | Dynamic vibration absorber, compressor and refrigeration and heating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202211444246.9A CN118057023A (en) | 2022-11-18 | 2022-11-18 | Dynamic vibration absorber, compressor and refrigerating and heating equipment |
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CN118057023A true CN118057023A (en) | 2024-05-21 |
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CN202211444246.9A Pending CN118057023A (en) | 2022-11-18 | 2022-11-18 | Dynamic vibration absorber, compressor and refrigerating and heating equipment |
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WO (1) | WO2024104001A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008202608A (en) * | 2007-02-16 | 2008-09-04 | Tokai Rubber Ind Ltd | Vibration damping device |
DE102012106582B4 (en) * | 2012-07-20 | 2016-12-22 | B.E.C. Breitbach Engineering Consulting Gmbh | Vibration damper for bending vibrations of a shaft |
CN104896714A (en) * | 2015-06-08 | 2015-09-09 | 合肥美的暖通设备有限公司 | Dynamic vibration absorber and air conditioner equipped with same |
CN108506418B (en) * | 2018-06-25 | 2020-12-22 | 北京无线电测量研究所 | Multi-degree-of-freedom cantilever beam type broadband vibration absorber |
CN218844528U (en) * | 2022-11-18 | 2023-04-11 | 安徽美芝制冷设备有限公司 | Dynamic vibration absorber, compressor and refrigerating and heating equipment |
-
2022
- 2022-11-18 CN CN202211444246.9A patent/CN118057023A/en active Pending
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- 2023-10-09 WO PCT/CN2023/123603 patent/WO2024104001A1/en unknown
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