CN219888614U

CN219888614U - Vibrator, stirling refrigerator and refrigerator

Info

Publication number: CN219888614U
Application number: CN202320755881.2U
Authority: CN
Inventors: 刘文宁; 李江涛; 刘冬; 李军锋; 袁顺涛; 黄庆
Original assignee: Qingdao Haier Biomedical Co Ltd
Current assignee: Qingdao Haier Biomedical Co Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-10-24
Anticipated expiration: 2033-04-07

Abstract

The utility model relates to the technical field of Stirling refrigerators, and discloses a vibrator. The vibrator includes: a vibration damping element configured with a central bore; the balancing weight is arranged on one side of the vibration reduction element and is provided with an avoidance hole corresponding to the central hole; the fixed element is used for fixedly connecting the vibration reduction element and the balancing weight; and the first end of the vibration reduction rod penetrates through the avoidance hole and the central hole and is fixedly connected with the vibration reduction element through the central hole, and the second end of the vibration reduction rod is used for being connected with an object to be damped. The vibrator has a high effective mass ratio, and the vibration reduction element of the vibrator has a high motion mass ratio. The utility model also discloses a Stirling refrigerator and a refrigerator.

Description

Vibrator, stirling refrigerator and refrigerator

Technical Field

The utility model relates to the technical field of Stirling refrigerators, in particular to a vibrator, a Stirling refrigerator and a refrigerator.

Background

The Stirling refrigerator is a mechanical refrigerator driven by electricity, has the advantages of simple structure, reliable operation, long service life, oil free, low noise, difficult abrasion, convenient and adjustable refrigerating capacity and the like, and is widely applied to the field of low-temperature refrigeration. Stirling refrigerators generally generate vibrations during operation, particularly free piston Stirling refrigerators employing a single piston compression configuration. The Stirling refrigerator is used as a core cold source of the low-temperature refrigerator, and vibration of the Stirling refrigerator must be controlled within a certain range, so that the noise of the whole refrigerator is reduced, and the product competitiveness is improved. Therefore, the stirling cooler is generally provided with a vibrator, and noise of the stirling cooler is reduced by the vibrator.

In the related art, the vibrator comprises a vibration reduction element and a vibration reduction rod, wherein the vibration reduction element is provided with a circumferential hole, one end of the vibration reduction rod penetrates through the circumferential hole to be fixedly connected with the vibration reduction element, and the other end of the vibration reduction rod is fixedly connected with an object to be damped.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the vibrator adopts a circumferential hole fixing structure, the effective mass ratio of the vibrator and the moving mass of the vibration reduction element are smaller, and the effective mass ratio and the moving mass of the vibration reduction element are required to be further improved.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the utility model and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a vibrator, a Stirling refrigerator and a refrigerator, which can improve the effective mass ratio of the vibrator and the motion mass ratio of a vibration reduction element.

In some embodiments, the vibrator includes: a vibration damping element configured with a central bore; the balancing weight is arranged on one side of the vibration reduction element and is provided with an avoidance hole corresponding to the central hole; the fixed element is used for fixedly connecting the vibration reduction element and the balancing weight; and the first end of the vibration reduction rod penetrates through the avoidance hole and the central hole and is fixedly connected with the vibration reduction element through the central hole, and the second end of the vibration reduction rod is used for being connected with an object to be damped.

In some embodiments, the vibration damping element comprises: a first leaf spring provided with a plurality of first vortex arms; the second plate spring is provided with a plurality of second vortex arms, and the second plate spring has the same structure as the first plate spring; the centers of the first plate spring, the second plate spring and the balancing weight are positioned on the same straight line, and the orthographic projection of the second vortex arm on the first plate spring is not overlapped with the first vortex arm.

In some embodiments, the balancing weight is an annular balancing weight, and the circular notch of the annular balancing weight is an avoidance hole; and/or, the external diameter of the balancing weight is equal to the external diameter of the vibration reduction element.

In some embodiments, the vibration reduction element is further configured with a circumferential hole, the balancing weight is configured with a fixing hole corresponding to the circumferential hole, and the hole wall of the fixing hole is provided with threads; the fixing element includes: the screw comprises a screw head part, a screw body and a screw tail part, wherein the screw head part is positioned at one side of the vibration reduction element far away from the balancing weight; the screw body passes through the circumferential hole and the fixing hole and is in threaded connection with the threads of the fixing hole; the tail of the screw extends to one side of the balancing weight far away from the vibration reduction element.

In some embodiments, the screw tail is provided with threads; the vibrator further includes: and the adjusting nut is arranged at the tail part of the screw and used for adjusting the gravity center of the vibrator.

In some embodiments, the damper rod includes a damper rod head, a damper rod body, and a damper rod tail; the vibration reduction rod head is positioned at one side of the vibration reduction element far away from the balancing weight; the vibration reduction rod body penetrates through the central hole and the avoidance hole and extends to one side of the balancing weight far away from the vibration reduction element; the tail part of the vibration damping rod is used for being connected with an object to be damped.

In some embodiments, the vibrator further comprises: the sleeve is sleeved on the vibration reduction rod body; when the vibrator is mounted on an object to be damped, the first end of the sleeve is abutted against the damping element, and the second end of the sleeve is abutted against the object to be damped.

In some embodiments, the vibrator further comprises: the first flat pad is sleeved on the fixing element and is positioned between the first plate spring and the second plate spring of the vibration reduction element; and/or the second flat pad is sleeved on the fixing element and is positioned between the vibration reduction element and the balancing weight; and/or the first elastic pad is sleeved on the fixing element and is positioned between the end part of the fixing element, which is close to the vibration reduction element, and the vibration reduction element; and/or the second elastic pad is sleeved on the vibration reduction rod and is positioned between the first end of the vibration reduction rod and the vibration reduction element; and/or the third flat pad is sleeved on the vibration reduction rod and is positioned between the second elastic pad and the vibration reduction element.

In some embodiments, a Stirling cooler includes: an end cap; and, the vibrator described above; the second end of the vibration reduction rod of the vibrator is fixedly connected with the inner wall surface or the outer wall surface of the end cover.

In some embodiments, the refrigerator includes a Stirling refrigerator as described above.

The vibrator, the Stirling refrigerator and the refrigerator provided by the embodiment of the disclosure can realize the following technical effects:

the vibrator provided by the embodiment of the disclosure comprises a vibration reduction element, a balancing weight, a fixing element and a vibration reduction rod, wherein the vibration reduction element is provided with a central hole; the balancing weight is arranged on one side of the vibration reduction element and is provided with an avoidance hole corresponding to the central hole; the fixed element is used for fixedly connecting the vibration reduction element and the balancing weight; the first end of the vibration reduction rod penetrates through the avoidance hole and the central hole and is fixedly connected with the vibration reduction element through the central hole, and the second end of the vibration reduction rod is used for being connected with an object to be damped. In the related art, a circumferential hole fixing structure is adopted, a small part of vortex arms and a central hole area of the vibration reduction element are motion areas, and compared with the related art, the vibrator provided by the embodiment of the disclosure is fixed by adopting the central hole, and a large part of vortex arms and an outer side area of the vibration reduction element are motion areas. Therefore, compared to the related art, the vibrator of the embodiment of the present disclosure can improve the effective mass ratio of the vibrator and the moving mass ratio of the vibration damping element.

In addition, under the condition that the vibration reduction requirement is fixed, the larger the effective mass ratio of the vibrator and the motion mass ratio of the vibration reduction element, the larger the proportion of the motion mass which can be provided by the vibrator to the total weight of the vibrator, the smaller the total mass required by the vibrator. The weight of the vibrator is reduced, and the light weight requirement is met.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the utility model.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic structural diagram of a vibrator according to an embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a vibration damping element provided in accordance with an embodiment of the present disclosure;

FIG. 3 is a schematic view of a counterweight provided by an embodiment of the disclosure;

FIG. 4 is a schematic view of a fixation element provided in an embodiment of the present disclosure;

fig. 5 is a front view of the vibrator shown in fig. 1;

FIG. 6 is a schematic view of the vibrator shown in FIG. 1 at another angle;

FIG. 7 is a schematic view of a part of a Stirling refrigerator according to an embodiment of the present disclosure, wherein a vibrator is provided on an outer wall surface of an end cover;

fig. 8 is a schematic partial structure of another stirling cooler according to an embodiment of the present disclosure, wherein a vibrator is disposed on an inner wall surface of an end cap.

Reference numerals:

1. a vibration damping element; 101. a central bore; 102. a first leaf spring; 1021. a first scroll arm; 103. a second leaf spring; 104. a circumferential hole;

2. balancing weight; 201. avoidance holes; 202. a fixing hole;

3. a fixing element; 301. a screw head; 302. a screw body; 303. a screw tail;

4. a vibration damping rod; 401. a vibrating rod head; 402. the tail part of the vibration reduction rod;

5. an adjusting nut;

6. a sleeve;

7. a first flat pad; 8. a second flat pad; 9. a first spring pad; 10. a third flat pad; 11. a second spring pad;

12. an end cap.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The Stirling cooler includes a free piston Stirling cooler including a single piston compression configuration, a dual piston compression configuration, and an opposed piston compression configuration. Currently, free piston stirling refrigerators using a single piston compression structure have been applied to the cooling of cryogenic refrigerators. Because of adopting a single-piston compression structure, the free piston Stirling refrigerator has larger vibration, but the vibration of the free piston Stirling refrigerator is required to be controlled in a reasonable range as a core cold source of a low-temperature refrigerator, so that the noise of the whole refrigerator is reduced, and the product competitiveness is improved.

Vibration damping modes of free piston stirling refrigerators are generally classified into active vibration damping and passive vibration damping. Active vibration reduction is mainly used in fields with high vibration requirements such as superconducting filtering, infrared detection and the like. Free piston Stirling refrigerators for use in cryogenic refrigerators typically employ passive vibration damping. The principle of passive vibration reduction is that the anti-resonance characteristic of a two-degree-of-freedom system is utilized, and the purpose of absorbing the vibration of the whole machine is achieved through the opposite movement of the passive vibration damper and the linear motor of the refrigerator at the same time, so that the noise of the refrigerator is reduced.

In the related art, the vibrator comprises a vibration reduction element and a vibration reduction rod, wherein the vibration reduction element is provided with a circumferential hole, one end of the vibration reduction rod penetrates through the circumferential hole to be fixedly connected with the vibrator, and the other end of the vibration reduction rod is fixedly connected with an object to be damped. However, in the related art, the vibrator adopts a circular hole fixed structure, the effective mass ratio of the vibrator is smaller than the moving mass of the vibration reduction element, and the effective mass ratio and the moving mass of the vibration reduction element are required to be further improved.

In one aspect, embodiments of the present disclosure provide a vibrator. The vibrator is a passive vibrator, and passively dampens vibration of a damping object.

Referring to fig. 1 to 6, the vibrator includes a vibration damping element 1, a weight 2, a fixing element 3, and a vibration damping rod 4.

The damping element 1 is configured with a central bore 101. The weight 2 is provided at one side of the vibration damping element 1, and is configured with a relief hole 201 corresponding to the center hole 101. The fixing element 3 is used for fixedly connecting the vibration reduction element 1 and the balancing weight 2. The first end of the vibration damping rod 4 passes through the avoidance hole 201 and the central hole 101 and is fixedly connected with the vibration damping element 1 through the central hole 101, and the second end of the vibration damping rod 4 is used for being connected with an object to be damped.

The vibrator provided by the embodiment of the disclosure comprises a vibration reduction element 1, a balancing weight 2, a fixing element 3 and a vibration reduction rod 4, wherein the vibration reduction element 1 is provided with a central hole 101; the balancing weight 2 is arranged on one side of the vibration reduction element 1 and is provided with an avoidance hole 201 corresponding to the central hole 101; the fixing element 3 is used for fixedly connecting the vibration reduction element 1 and the balancing weight 2; the first end of the vibration damping rod 4 passes through the avoidance hole 201 and the central hole 101 and is fixedly connected with the vibration damping element 1 through the central hole 101, and the second end of the vibration damping rod 4 is used for being connected with an object to be damped. In the related art, a circumferential hole fixing structure is adopted, a small part of vortex arms and a central hole area of the vibration reduction element are motion areas, and compared with the related art, the vibrator provided by the embodiment of the disclosure is fixed by adopting the central hole, and a large part of vortex arms and an outer side area of the vibration reduction element 1 are motion areas. Therefore, compared to the related art, the vibrator of the embodiment of the present disclosure can improve the effective mass ratio of the vibrator and the moving mass ratio of the vibration damping element.

It will be appreciated that if the moving mass of the damping element is relatively small, i.e. the proportion of the mass of the moving part of the damping element to the total mass thereof is small, then the majority of the mass of the damping element will not provide the required mover mass for the vibrator, and only the total weight of the whole vibrator will be increased in vain. The masses of the other components than the mover mass are all ineffective masses.

Wherein moving mass ratio = mass of moving part/total mass of vibration damping element. In the passive vibrator, the masses of the other parts except the mover mass are all ineffective masses, and the effective mass is the mover mass, and the effective mass ratio=the mover mass/the total mass of the vibrator.

In some embodiments, in combination with fig. 1 and 2, the vibration damping element 1 comprises a first leaf spring 102 and a second leaf spring 103. The first plate spring 102 is provided with a plurality of first scroll arms 1021. The second leaf spring 103 is provided with a plurality of second vortex arms, and the second leaf spring 103 has the same structure as the first leaf spring 102. Wherein the centers of the first plate spring 102, the second plate spring 103 and the balancing weight 2 are on the same straight line, and the orthographic projection of the second vortex arm on the first plate spring 102 is not overlapped with the first vortex arm 1021. The orthographic projection of the second vortex arm on the first plate spring 102 is not overlapped with the first vortex arm 1021, that is, the first plate spring 102 rotates by a certain angle relative to the second plate spring 103 by taking the central hole 101 as the rotation center, so that the first plate spring 102 and the second plate spring 103 are arranged in a staggered manner.

By providing the first leaf spring 102 and the second leaf spring 103, a reaction force can be generated at the time of resonance, and forced vibration of the object to be damped can be absorbed, so that vibration of the object to be damped can be reduced. By arranging the first leaf springs 102 and the second leaf springs 103 in a staggered manner, the energy lost by the vibration system can be continuously supplemented, the amplitude of vibration can be maintained, and the vibration damping effect can be improved.

In some embodiments, referring to fig. 1 and 3, the weight 2 is an annular weight, and the circular notch of the annular weight is the avoidance hole 201. The weight of the vibrator can be balanced by arranging the balancing weight 2, the mass of the mover is increased, and the vibration reduction effect of the vibrator is improved. The balancing weight is arranged to be an annular balancing weight so as to be fixedly connected with the vibration reduction element 1.

Alternatively, referring to fig. 1, the outer diameter of the weight 2 is equal to the outer diameter of the vibration damping element 1.

In some embodiments, in combination with fig. 1, 2, 3 and 4, the vibration damping element 1 is further configured with a circumferential hole 104, the balancing weight 2 is configured with a fixing hole 202 corresponding to the circumferential hole 104, and the wall of the fixing hole 202 is provided with threads.

The fixation element 3 comprises a screw comprising a screw head 301, a screw body 302 and a screw tail 303. The screw head 301 is positioned on one side of the vibration reduction element 1 away from the balancing weight 2; the screw body 302 passes through the circumferential hole 104 and the fixing hole 202 and is screwed with the thread of the fixing hole 202; the screw tail 303 extends to the side of the balancing weight 2 remote from the damping element 1.

By providing screws, circumferential holes 104 and fixing holes 202, the vibration damping element 1 and the fixing element 2 can be fixedly connected. Specifically, the screw head 301 is located at a side of the vibration reduction element 1 away from the balancing weight 2, the screw body 302 is in threaded connection with the fixing hole 202 of the balancing weight 2, and the vibration reduction element 1 and the fixing element 2 are compressed through cooperation of the screw head 301 and threads.

Optionally, the number of the circumferential holes 104 is plural, the plurality of circumferential holes 104 are centrally symmetrical, and the center of symmetry is the central hole 101. The number and positions of the fixing holes 202 and the fixing elements 3 correspond to those of the circumferential holes 104, namely, the fixing holes 202 are arranged in a plurality, the plurality of fixing holes 202 are symmetrical in center, and the symmetrical center is the avoiding hole 201. The arrangement is beneficial to keeping the balance of the vibration reduction element 1 and ensuring the fixing effect on the vibration reduction element 1 and the fixing element 2.

Alternatively, referring to fig. 1, the number of the circumferential holes 104, the fixing holes 202 and the fixing elements 3 is 4. The arrangement is beneficial to keeping the balance of the vibration reduction element 1 and ensuring the fixing effect on the vibration reduction element 1 and the fixing element 2.

In some embodiments, referring to fig. 5, the screw tail is provided with threads. The vibrator further comprises an adjusting nut 5, the adjusting nut 5 being arranged at the tail 303 of the screw. The adjusting nut 5 is screwed to the screw tail 303, and the position of the adjusting nut 5 at the screw tail 303 can be changed by rotating the adjusting nut 5, so that the center of gravity of the vibrator can be adjusted.

In some embodiments, in conjunction with fig. 1 and 5, the shock rod 4 includes a shock rod head 401, a shock rod body, and a shock rod tail 402. The vibration reduction rod head 401 is positioned at one side of the vibration reduction element away from the balancing weight 5; the vibration damping rod body passes through the central hole 101 and the avoidance hole 201 and extends to one side of the balancing weight 2 away from the vibration damping element 1; the damper lever tail 402 is adapted to be coupled to an object to be damped. So arranged, the damping element can be connected to the object to be damped via the central bore 101.

Optionally, the damper rod tail 402 is secured to the object to be damped by brazing or bolting. The damper rod tail 402 and the object to be damped can be firmly fixed together by brazing or screwing.

Brazing generally refers to a method of filling the gaps between solid base materials with a liquid brazing material having a melting point lower than that of the base materials, and forming a bonded type of joining material by interdiffusion. The method has the advantages of small influence on the performance of the base material, high productivity, wide applicability and the like.

Under the condition that the vibration-damping rod tail 402 is fixed to an object to be damped through the screw connection, the vibration-damping rod tail 402 is provided with threads, the object to be damped is provided with a mounting hole with threads, the vibration-damping rod tail 402 is screwed into the mounting hole, and the screw connection of the vibration-damping rod tail 402 and the object to be damped is achieved.

In some embodiments, referring to fig. 5 and 6, the vibrator further includes a sleeve 6, and the sleeve 6 is sleeved on the vibration-damping rod body. In the case of a vibrator mounted to an object to be damped, the first end of the sleeve 6 abuts against the damping element 1 and the second end of the sleeve abuts against the object to be damped. The damping element 1 can be limited by the sleeve 6, and the distance between the damping element and the object to be damped can be changed by adjusting the length of the sleeve.

In some embodiments, referring to fig. 1, the vibrator further comprises a first flat pad 7, the first flat pad 7 being sleeved on the fixing element 3 and being located between the first leaf spring 102 and the second leaf spring 103 of the vibration damping element. By providing the first flat pad 7, the first plate spring 102 and the second plate spring 103 can be separated, and the first plate spring 102 and the second plate spring 103 are prevented from affecting each other.

In some embodiments, referring to fig. 1, the vibrator further comprises a second flat pad 8, and the second flat pad 8 is sleeved on the fixing element 3 and is located between the vibration reduction element 1 and the balancing weight 2. By providing the second flat pad 8, the second plate spring 103 and the weight 2 can be separated, and the second plate spring 103 and the weight 2 are prevented from affecting each other.

In some embodiments, referring to fig. 1, the vibrator further comprises a first spring pad 9, where the first spring pad 9 is sleeved on the fixing element 3 and is located between an end of the fixing element 3 near the damping element and the damping element 1. By providing the first spring pad 9, the friction force between the fixing element 3 and the vibration damping element 1 can be increased, preventing the fixing element 3 from loosening.

In some embodiments, referring to fig. 1, the vibrator further includes a second spring pad 11, where the second spring pad 11 is sleeved on the vibration damping rod 4 and is located between the first end of the vibration damping rod 4 and the vibration damping element 1. That is, the second spring pad 11 is located between the damper rod head 401 and the damper element 1. Through setting up second bullet pad 11, can increase the frictional force between balancing weight 2 and the balancing weight 2, prevent that balancing weight 2 from becoming flexible.

In some embodiments, referring to fig. 1, the vibrator further includes a third flat pad 10, where the third flat pad 10 is sleeved on the vibration-damping rod 4 and is located between the second elastic pad 11 and the vibration-damping element 1. By providing the third flat pad 10, the damage of the second spring pad 11 to the surface of the vibration damping element 1 when the vibration damping rod 4 is detached can be alleviated by the cooperation of the lower side of the second spring pad 11.

In another aspect, embodiments of the present disclosure provide a Stirling cooler.

Referring to fig. 7 and 8, a stirling cooler according to an embodiment of the present disclosure includes an end cap 12 and the vibrator described above. The second end of the vibration damping rod 4 of the vibrator is fixedly connected with the inner wall surface or the outer wall surface of the end cover 12.

The Stirling refrigerator provided by the embodiment of the disclosure can be flexibly installed according to requirements, and can be installed outside the refrigerator or inside the refrigerator. Meanwhile, the vibrator of the Stirling refrigerator provided by the embodiment of the disclosure comprises a vibration reduction element 1, a balancing weight 2, a fixing element 3 and a vibration reduction rod 4, wherein the vibration reduction element 1 is provided with a central hole 101; the balancing weight 2 is arranged on one side of the vibration reduction element 1 and is provided with an avoidance hole 201 corresponding to the central hole 101; the fixing element 3 is used for fixedly connecting the vibration reduction element 1 and the balancing weight 2; the first end of the vibration damping rod 4 passes through the avoidance hole 201 and the central hole 101 and is fixedly connected with the vibration damping element 1 through the central hole 101, and the second end of the vibration damping rod 4 is used for being connected with an object to be damped. In the related art, a circumferential hole fixing structure is adopted, a small part of vortex arms and a central hole area of the vibration reduction element are motion areas, and compared with the related art, the vibrator provided by the embodiment of the disclosure is fixed by adopting the central hole, and a large part of vortex arms and an outer side area of the vibration reduction element 1 are motion areas. Therefore, compared to the related art, the vibrator of the embodiment of the present disclosure can improve the effective mass ratio of the vibrator and the moving mass ratio of the vibration damping element.

In yet another aspect, an embodiment of the present disclosure provides a refrigerator.

The refrigerator provided by the embodiment of the disclosure comprises the Stirling refrigerator. Because the refrigerator provided by the embodiment of the disclosure includes the stirling cooler, the refrigerator has all the beneficial effects of the stirling cooler, and will not be described in detail herein. Alternatively, the refrigerator is a low temperature refrigerator.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vibrator, characterized by comprising:

a vibration damping element configured with a central bore;

the balancing weight is arranged on one side of the vibration reduction element and is provided with an avoidance hole corresponding to the central hole;

the fixed element is used for fixedly connecting the vibration reduction element and the balancing weight; and, a step of, in the first embodiment,

the first end of the vibration reduction rod penetrates through the avoidance hole and the central hole and is fixedly connected with the vibration reduction element through the central hole, and the second end of the vibration reduction rod is used for being connected with an object to be damped.

2. The vibrator according to claim 1, characterized in that the vibration damping element comprises:

a first leaf spring provided with a plurality of first vortex arms; and, a step of, in the first embodiment,

the second plate spring is provided with a plurality of second vortex arms, and the second plate spring has the same structure as the first plate spring; the centers of the first plate spring, the second plate spring and the balancing weight are positioned on the same straight line, and the orthographic projection of the second vortex arm on the first plate spring is not overlapped with the first vortex arm.

3. The vibrator according to claim 1, characterized in that,

the balancing weight is an annular balancing weight, and a circular notch of the annular balancing weight is an avoidance hole; and/or, the external diameter of the balancing weight is equal to the external diameter of the vibration reduction element.

4. A vibrator according to any one of claims 1-3, characterized in that the vibration damping element is further configured with a circumferential hole, the balancing weight is configured with a fixing hole corresponding to the circumferential hole, the wall of the fixing hole is provided with threads; the fixing element includes:

the screw comprises a screw head part, a screw body and a screw tail part, wherein the screw head part is positioned at one side of the vibration reduction element far away from the balancing weight; the screw body passes through the circumferential hole and the fixing hole and is in threaded connection with the threads of the fixing hole; the tail of the screw extends to one side of the balancing weight far away from the vibration reduction element.

5. The vibrator of claim 4, wherein the screw tail is provided with threads; the vibrator further includes:

and the adjusting nut is arranged at the tail part of the screw and used for adjusting the gravity center of the vibrator.

6. A transducer according to any one of claims 1 to 3, wherein the damper rod comprises a damper rod head portion, a damper rod body and a damper rod tail portion; the vibration reduction rod head is positioned at one side of the vibration reduction element far away from the balancing weight; the vibration reduction rod body penetrates through the central hole and the avoidance hole and extends to one side of the balancing weight far away from the vibration reduction element; the tail part of the vibration damping rod is used for being connected with an object to be damped.

7. The transducer of claim 6, further comprising:

the sleeve is sleeved on the vibration reduction rod body; when the vibrator is mounted on an object to be damped, the first end of the sleeve is abutted against the damping element, and the second end of the sleeve is abutted against the object to be damped.

8. A transducer according to any of claims 1 to 3, further comprising:

the first flat pad is sleeved on the fixing element and is positioned between the first plate spring and the second plate spring of the vibration reduction element; and/or the number of the groups of groups,

the second flat pad is sleeved on the fixing element and is positioned between the vibration reduction element and the balancing weight; and/or the number of the groups of groups,

the first elastic pad is sleeved on the fixing element and is positioned between the end part of the fixing element, which is close to the vibration reduction element, and the vibration reduction element; and/or the number of the groups of groups,

the second elastic pad is sleeved on the vibration reduction rod and is positioned between the first end of the vibration reduction rod and the vibration reduction element; and/or the number of the groups of groups,

the third flat pad is sleeved on the vibration reduction rod and is positioned between the second elastic pad and the vibration reduction element.

9. A stirling cooler comprising:

an end cap; and, a step of, in the first embodiment,

a transducer as claimed in any one of claims 1 to 8; the second end of the vibration reduction rod of the vibrator is fixedly connected with the inner wall surface or the outer wall surface of the end cover.

10. A refrigerator comprising the stirling cooler of claim 9.