CN114484915A - Passive shock absorber of free piston Stirling refrigerator for low-temperature refrigerator - Google Patents
Passive shock absorber of free piston Stirling refrigerator for low-temperature refrigerator Download PDFInfo
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- CN114484915A CN114484915A CN202210131866.0A CN202210131866A CN114484915A CN 114484915 A CN114484915 A CN 114484915A CN 202210131866 A CN202210131866 A CN 202210131866A CN 114484915 A CN114484915 A CN 114484915A
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- plate spring
- damper
- split body
- shock absorber
- free piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
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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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/073—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only leaf springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Thermal Sciences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a free piston Stirling refrigerator passive damper for a low-temperature refrigerator, which comprises: the counterweight block is provided with a gravity adjusting unit, a large-column-head inner hexagonal screw is vertically arranged at the center of the counterweight block, and the large-column-head inner hexagonal screw is in threaded connection with the counterweight block; the shock absorber positioning sleeve is sleeved on the hexagon socket screw in the large column head; the shock absorption plate spring unit is sleeved and fixed on the upper portion of the shock absorber positioning sleeve, the outer peripheral side of the shock absorption plate spring unit is fixedly connected with the shock absorber welding ring, the shock absorber welding ring is fixedly connected with the inner side wall of the shell of the refrigerating machine, and the shock absorption plate spring unit comprises an upper plate spring assembly, a spacer ring assembly and a lower plate spring assembly which are sequentially stacked. The invention improves the axial rigidity of the vibration damping plate spring unit, is suitable for vibration damping of the free piston Stirling refrigerator with larger input power and larger weight, and reduces the cost and the production time.
Description
Technical Field
The invention relates to the technical field of low-temperature refrigeration, in particular to a passive shock absorber of a free piston Stirling refrigerator for a low-temperature refrigerator.
Background
The free piston Stirling refrigerator has the advantages of reliable operation, large refrigerating capacity, high efficiency, long service life and the like, and the manufacturing cost of the free piston Stirling refrigerator is continuously reduced along with the development of science and technology. Currently, free piston stirling coolers have been used for cooling cryogenic refrigerators. Because of adopting the single-piston compression structure, the free-piston Stirling refrigerator has larger vibration which is used as a core cold source of the low-temperature refrigerator, and the vibration of the free-piston Stirling refrigerator must be controlled in a reasonable range, which is beneficial to reducing the noise of the whole refrigerator and improving the product competitiveness. The vibration reduction schemes of the free piston Stirling refrigerator are generally divided into two types, namely active vibration reduction and passive vibration reduction. The active vibration reduction is mainly used in the fields with higher requirements on vibration, such as superconducting filtering, infrared detection and the like, and the free piston Stirling refrigerator for the low-temperature refrigerator generally adopts passive vibration reduction.
The principle of passive vibration reduction is that the anti-resonance characteristic of 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 absorber and the linear motor of the refrigerating machine at the same time, so that the noise of the refrigerating machine is reduced. The passive damper is generally composed of a damping plate spring, a balancing weight and other components, is mainly installed outside the tail end of the refrigerating machine, and changes the natural frequency of the damper by adjusting the mass of the balancing weight so as to enable the natural frequency to be consistent with the excitation frequency of the whole refrigerating machine. Meanwhile, in order to avoid the problem that parts are rusted due to long-time external arrangement, the moving part of the shock absorber needs to be painted.
As for the existing passive damper, the passive damper is generally used for damping the free piston Stirling refrigerator with smaller power, so that the damping plate springs are arranged at intervals by adopting a single plate. When the maximum input power and mass of the refrigerator are increased and the vibration magnitude is increased, the plate spring of the structure is easy to break due to insufficient axial rigidity. The passive vibration absorber is externally arranged at the tail part of the refrigerating machine, although the natural frequency of the vibration absorber can be conveniently adjusted by changing the mass of the balancing weight, for mass production, the excitation frequency of the machine is determined, and the natural frequency of the vibration absorber is fixed. More people consider the influence of avoiding many-sided unknown factor in the production process to cause the machine, for example the shock absorber collision damage that causes among the test transportation process machine drops or the long distance transportation process, and the processing of spraying paint leads to shock absorber cost to increase simultaneously, and long increaseing is produced to free piston stirling refrigerator to external shock absorber also does not benefit to the aesthetic property of free piston stirling refrigerator integration.
Disclosure of Invention
In view of the above, it is desirable to provide a passive damper for a free piston stirling cryocooler for a cryorefrigerator.
A free piston stirling cooler passive damper for a cryogenic refrigerator comprising:
the weight block is provided with a gravity adjusting unit, the gravity adjusting unit can adjust the weight of the weight block, a large-round-column-head inner hexagonal screw is vertically arranged at the central position of the weight block, and the large-round-column-head inner hexagonal screw is in threaded connection with the weight block;
the shock absorber positioning sleeve is sleeved on the large-column-head hexagon socket screw, and the shock absorber positioning sleeve can be locked and fixed on the balancing weight by the large-column-head hexagon socket screw;
the shock absorption plate spring unit is sleeved and fixed on the upper portion of the shock absorber positioning sleeve, the outer peripheral side of the shock absorption plate spring unit is fixedly connected with a shock absorber welding ring, the shock absorber welding ring is fixedly connected with the inner side wall of the shell of the refrigerating machine, and the shock absorption plate spring unit comprises an upper plate spring assembly, a spacer ring assembly and a lower plate spring assembly which are sequentially stacked.
In one embodiment, the gravity adjusting unit includes:
the fastening screws are arranged on the end surface of the balancing weight at intervals and are in threaded connection with the balancing weight;
the nut, threaded connection be in holding screw's bottom, just the nut with still be equipped with flat the pad between the balancing weight, flat the cover is established on the holding screw.
In one embodiment, the contact surface of the nut and the first flat pad and the threaded connection part of the nut and the set screw are provided with adhesive.
In one embodiment, the bottom of the shock absorber positioning sleeve abuts against the upper end face of the balancing weight, and the top of the shock absorber positioning sleeve abuts against the bottom of the bolt head of the large-column-head socket head hexagon screw through a shock absorber gasket and a stop gasket.
In one embodiment, the upper plate spring assembly comprises an upper vibration damping plate spring lower split body, an upper vibration damping plate spring middle split body and an upper vibration damping plate spring upper split body which are sequentially stacked from bottom to top;
the lower damping plate spring assembly comprises a lower damping plate spring lower split body, a lower damping plate spring middle split body and a lower damping plate spring upper split body which are sequentially stacked from bottom to top;
the spacer assembly comprises a small vibration reduction spacer and a large vibration reduction spacer, the small vibration reduction spacer is concentrically arranged at the position of a concentric through hole on the periphery of the upper split body of the lower vibration reduction plate spring and the lower split body of the upper vibration reduction plate spring, and the large vibration reduction spacer is concentrically arranged at the position of a central through hole on the upper split body of the lower vibration reduction plate spring and the lower split body of the upper vibration reduction plate spring.
In one embodiment, the outer peripheral side of the damping plate spring unit is fixedly connected with the damper welding ring through a small cylindrical socket head cap screw and a small nut, wherein a second small flat pad is further arranged between the small cylindrical socket head cap screw and the lower damping plate spring split body, and a third small flat pad is further arranged between the upper damping plate spring split body and the damper welding ring.
In one embodiment, a concave notch is arranged on the welding ring of the shock absorber, and the concave notch can avoid the outgoing line of the linear motor of the refrigerator.
In one embodiment, a step is arranged inside the refrigerator shell, the vibration damper welding ring is clamped and fixed on the step, and the vibration damper welding ring is welded and fixed with the refrigerator shell.
The passive damper for the free piston Stirling refrigerator for the low-temperature refrigerator adopts a structure in which the upper plate spring assembly, the spacer ring assembly and the lower plate spring assembly are combined and arranged, improves the axial rigidity of the damping plate spring unit on the premise of not increasing the material thickness, is suitable for damping of the free piston Stirling refrigerator with higher input power and larger weight, is arranged in the refrigerator shell, can effectively avoid interference of external factors, does not need to perform rust prevention treatment on moving parts of the damper, reduces the cost and the production time of the free piston Stirling refrigerator, improves the attractiveness of the whole refrigerator, and is simultaneously provided with the gravity adjusting unit on the balancing weight to facilitate fine adjustment of the natural frequency of the damper.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the free piston Stirling cryocooler passive damper for a cryogenic refrigerator of the present invention;
FIG. 2 is a schematic structural diagram of a weight member according to the present invention;
FIG. 3 is a schematic structural view of a lower split of the lower damping plate spring of the present invention;
FIG. 4 is a schematic structural view of a weld ring of the damper of the present invention;
FIG. 5 is a schematic view of the construction of the shock absorber positioning sleeve of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 5, an embodiment of the present invention provides a free piston stirling cooler passive damper for a cryogenic refrigerator, including:
the counterweight block 4 is provided with a gravity adjusting unit, the gravity adjusting unit can adjust the weight of the counterweight block 4, a large-column-head socket head cap screw 20 is vertically arranged at the central position of the counterweight block 4, and the large-column-head socket head cap screw 20 is in threaded connection with the counterweight block 4;
the shock absorber positioning sleeve 5 is sleeved on the large-column-head hexagon socket head cap screw 20, and the shock absorber positioning sleeve 5 can be locked and fixed on the balancing weight 4 by the large-column-head hexagon socket head cap screw 20;
the vibration damping plate spring unit is sleeved and fixed on the upper portion of the vibration damper positioning sleeve 5, the outer peripheral side of the vibration damping plate spring unit is fixedly connected with a vibration damper welding ring 17, the vibration damper welding ring 17 is fixedly connected with the inner side wall of the refrigerator shell 22, and the vibration damping plate spring unit comprises an upper plate spring assembly, a spacer ring assembly and a lower plate spring assembly which are sequentially stacked.
The passive damper for the free piston Stirling refrigerator for the low-temperature refrigerator adopts a structure in which the upper plate spring assembly, the spacer ring assembly and the lower plate spring assembly are combined and arranged, improves the axial rigidity of the damping plate spring unit on the premise of not increasing the thickness of materials, is suitable for damping of the free piston Stirling refrigerator with higher input power and larger weight, is arranged in the refrigerator shell 22, can effectively avoid interference of external factors, does not need to perform rust prevention treatment on moving parts of the damper, reduces the cost and the production time of the free piston Stirling refrigerator, improves the attractiveness of the whole refrigerator, and is beneficial to fine adjustment of the inherent frequency of the damper due to the gravity adjusting unit arranged on the balancing weight 4.
In an embodiment of the present invention, the gravity adjusting unit includes:
the fastening screws 3 are arranged on the end surface of the balancing weight 4 at intervals, and the fastening screws 3 are in threaded connection with the balancing weight 4;
In this embodiment, a threaded through hole is processed at the center of the balancing weight 4, and is used for the threaded connection of the hexagon socket head cap screw 20, and a plurality of threaded through holes are evenly processed near the outer circumference on the upper end face of the balancing weight 4 for the connection of the set screw 3, and through changing the number of the nuts 1 and the set screws 3 installed on the balancing weight 4, the movement quality of the passive vibration absorber can be changed, and then the natural frequency of the passive vibration absorber can be changed.
Optionally, in order to improve the fastening effect, the contact surface between the nut 1 and the first flat pad 2 and the threaded connection between the nut 1 and the set screw 3 are provided with adhesive.
In an embodiment of the present invention, the bottom of the shock absorber positioning sleeve 5 abuts against the upper end surface of the counterweight block 4, and the top of the shock absorber positioning sleeve 5 abuts against the bottom of the bolt head of the large-column-head socket head cap screw 20 through a shock absorber washer 18 and a stop washer 19.
In this embodiment, a circular through hole is formed in the middle of the shock absorber positioning sleeve 5, and the circular through hole needs to be concentrically assembled above the central threaded through hole of the counterweight block 4 for matching with the large-column-head socket head cap screw 20. The lower end surface of the shock absorber positioning sleeve 5 is tightly attached to the upper end surface of the weight 4, and the upper end surface of the shock absorber positioning sleeve 5 is tightly attached to the lower end surface of the shock absorber gasket 18, so that the circumferential rotation of the shock absorber positioning sleeve is limited.
In addition, the upper end surface of the shock absorber positioning sleeve 5 is tightly attached to the lower end surface of the stop washer 19 to limit the circumferential rotation of the stop washer 19, and all contact joints of the shock absorber washer 18 are glued to be fixedly connected; a large-column-head hexagon socket head cap screw 20 is concentrically inserted into a concentric through hole formed by the stop washer 19, the shock absorber washer 18, the shock absorber positioning sleeve 5 and the balancing weight 4 from the upper part, and is in threaded connection with a central threaded through hole of the balancing weight 4.
In an embodiment of the present invention, the upper plate spring assembly includes an upper vibration damping plate spring lower split body 12, an upper vibration damping plate spring middle split body 13, and an upper vibration damping plate spring upper split body 14, which are sequentially stacked from bottom to top;
the lower damping plate spring assembly comprises a lower damping plate spring lower split body 8, a lower damping plate spring middle split body 9 and a lower damping plate spring upper split body 10 which are sequentially stacked from bottom to top;
the spacer assembly comprises a small vibration reduction spacer 11 and a large vibration reduction spacer 16, the small vibration reduction spacer 11 is concentrically arranged at the concentric through hole positions of the peripheries of the upper split body 10 of the lower vibration reduction plate spring and the lower split body 12 of the upper vibration reduction plate spring, and the large vibration reduction spacer 16 is concentrically arranged at the central through hole positions of the upper split body 10 of the lower vibration reduction plate spring and the lower split body 12 of the upper vibration reduction plate spring.
In the embodiment, the upper part of the shock absorber positioning sleeve 5 is provided with a circular long boss which is used for penetrating through a central through hole of a lower damping plate spring lower split body 8, a lower damping plate spring middle split body 9, a lower damping plate spring upper split body 10, an upper damping plate spring lower split body 12, an upper damping plate spring middle split body 13, an upper damping plate spring upper split body 14 and a damping large spacer ring 16 and is axially positioned by means of a middle step thereof, and the contact connection parts of the shock absorber positioning sleeve 5 and other parts are all connected by gluing in a fastening way.
The lower vibration damping plate spring lower split body 8, the lower vibration damping plate spring middle split body 9, the lower vibration damping plate spring upper split body 10, the upper vibration damping plate spring lower split body 12, the upper vibration damping plate spring middle split body 13 and the upper vibration damping plate spring upper split body 14 are all the same vibration damping plate spring, a concave notch for avoiding the outgoing line of the linear motor of the refrigerating machine is further processed on the periphery of the same vibration damping plate spring except four through holes, and the central through hole is used for the concentric insertion of a circular long boss on the upper part of the vibration damper positioning sleeve 5. The lower vibration damping plate spring lower split body 8, the lower vibration damping plate spring middle split body 9 and the lower vibration damping plate spring upper split body 10 are tightly attached and have coincident structural characteristics to form a lower plate spring assembly, and the lower plate spring assembly has larger axial and radial stiffness than a single plate spring. The upper damping plate spring lower split body 12, the upper damping plate spring middle split body 13 and the upper damping plate spring upper split body 14 are tightly attached and have overlapped structural characteristics to form an upper plate spring assembly, and the upper plate spring assembly also has larger axial and radial stiffness than a single plate spring. The upper plate spring assembly and the lower plate spring assembly are arranged in a reverse direction, and the concave notches of the upper plate spring assembly and the lower plate spring assembly face in a consistent direction.
The small vibration reduction spacing ring 11 is concentrically arranged at the concentric through hole of the peripheries of the upper split body 10 of the lower vibration reduction plate spring and the lower split body 12 of the upper vibration reduction plate spring, the upper end surface of the small vibration reduction spacing ring 11 is tightly attached to the lower end surface of the lower split body 12 of the upper vibration reduction plate spring, the lower end surface is tightly attached to the upper end surface of the upper split body 10 of the lower vibration reduction plate spring, and the contact surface of the small vibration reduction spacing ring 11 is glued for fastening connection. The large vibration reduction spacing ring 16 is concentrically arranged at the central through hole of the upper split body 10 of the lower vibration reduction plate spring and the central through hole of the lower split body 12 of the upper vibration reduction plate spring, the upper end surface of the large vibration reduction spacing ring 16 is tightly attached to the lower end surface of the lower split body 12 of the upper vibration reduction plate spring, the lower end surface is tightly attached to the upper end surface of the upper split body 10 of the lower vibration reduction plate spring, and the contact surface of the large vibration reduction spacing ring 16 is glued for fastening connection.
In an embodiment of the present invention, the outer peripheral side of the damping plate spring unit is fixedly connected to the damper welding ring 17 through a small cylindrical socket head cap screw 6 and a small nut 21, wherein a second small flat pad 7 is further disposed between the small cylindrical socket head cap screw 6 and the lower damping plate spring split body 8, and a third small flat pad 15 is further disposed between the upper damping plate spring split body 14 and the damper welding ring 17.
Optionally, a concave notch is formed in the shock absorber welding ring 17, and the concave notch can avoid outgoing lines of the linear motor of the refrigerator. In this embodiment, the welding ring 17 of the vibration damper is a circular ring-shaped component, on which a plurality of threaded through holes and a concave notch for avoiding the outgoing line of the linear motor of the refrigerator are uniformly processed, and the shape of the notch is consistent with that of the vibration damping spring unit.
In an embodiment of the present invention, a step is disposed inside the refrigerator housing 22, the shock absorber welding ring 17 is clamped and fixed on the step, and the shock absorber welding ring 17 is welded and fixed with the refrigerator housing 22.
In the invention, the welding ring 17 of the shock absorber is axially positioned through the step inside the refrigerator shell 22, the welding ring 17 of the shock absorber is welded and fixed with the refrigerator shell 22 through welding means such as brazing, and during assembly, the threaded through holes on the welding ring 17 of the shock absorber are required to be in one-to-one concentric correspondence with the peripheral through holes on the upper split body 14 of the upper damping plate spring, and the concave notches are in the same orientation. And the small column cap inner hexagon screw 6 is concentrically inserted from a through hole below the lower split body 8 of the lower damping plate spring and is in threaded connection with a threaded through hole on the welding ring 17 of the shock absorber. The small nut 21 plays a role in reinforcing and connecting the small column head hexagon socket head cap screw 6, and the contact connection part of the small column head hexagon socket head cap screw 6 and the part is further fastened and connected by adopting adhesion, so that the assembly of the passive damper is completed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples are only illustrative of several embodiments of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A passive damper of a free piston Stirling refrigerator for a cryogenic refrigerator, comprising:
the weight block (4) is provided with a gravity adjusting unit, the gravity adjusting unit can adjust the weight of the weight block (4), a large-column-head inner hexagon screw (20) is vertically arranged at the central position of the weight block (4), and the large-column-head inner hexagon screw (20) is in threaded connection with the weight block (4);
the shock absorber positioning sleeve (5) is sleeved on the large-column-head hexagon socket head cap screw (20), and the shock absorber positioning sleeve (5) can be locked and fixed on the balancing weight (4) by the large-column-head hexagon socket head cap screw (20);
the shock absorption plate spring unit is sleeved and fixed on the upper portion of the shock absorber positioning sleeve (5), the outer peripheral side of the shock absorption plate spring unit is fixedly connected with a shock absorber welding ring (17), the shock absorber welding ring (17) is fixedly connected with the inner side wall of the refrigerator shell (22), and the shock absorption plate spring unit comprises an upper plate spring assembly, a spacer ring assembly and a lower plate spring assembly which are sequentially stacked.
2. The free piston stirling cooler passive damper for a cryorefrigerator of claim 1 wherein said gravity adjustment unit comprises:
the fastening screws (3) are arranged on the end surface of the balancing weight (4) at intervals, and the fastening screws (3) are in threaded connection with the balancing weight (4);
nut (1), threaded connection is in the bottom of holding screw (3), just nut (1) with still be equipped with flat pad (2) between balancing weight (4), flat pad (2) cover is established on holding screw (3).
3. The passive damper of the free piston Stirling refrigerator for the cryogenic refrigerator according to claim 2, wherein the contact surface of the nut (1) and the first flat gasket (2) and the threaded connection of the nut (1) and the set screw (3) are provided with glue.
4. The passive damper of the free piston Stirling refrigerator for the cryogenic refrigerator according to claim 1, wherein the bottom of the damper positioning sleeve (5) abuts against the upper end face of the counterweight (4), and the top of the damper positioning sleeve (5) abuts against the bottom of the bolt head of the large-column-head hexagon socket head cap screw (20) through a damper gasket (18) and a stop gasket (19).
5. The passive damper of the free piston stirling cooler for the cryogenic refrigerator according to claim 1, wherein the upper plate spring assembly comprises an upper damping plate spring lower split body (12), an upper damping plate spring middle split body (13) and an upper damping plate spring upper split body (14) which are stacked in sequence from bottom to top;
the lower damping plate spring assembly comprises a lower damping plate spring lower split body (8), a lower damping plate spring middle split body (9) and a lower damping plate spring upper split body (10) which are sequentially stacked from bottom to top;
the spacer assembly comprises a small vibration reduction spacer (11) and a large vibration reduction spacer (16), the small vibration reduction spacer (11) is concentrically arranged at the concentric through hole positions of the peripheries of the upper split body (10) of the lower vibration reduction plate spring and the lower split body (12) of the upper vibration reduction plate spring, and the large vibration reduction spacer (16) is concentrically arranged at the central through hole positions of the upper split body (10) of the lower vibration reduction plate spring and the lower split body (12) of the upper vibration reduction plate spring.
6. The passive damper for the free piston stirling cryocooler of claim 5, wherein the outer periphery of the damper leaf spring unit is fixedly connected to the damper welding ring (17) by fixedly connecting a small cylindrical socket head cap screw (6) and a small nut (21), wherein a second small flat pad (7) is further provided between the small cylindrical socket head cap screw (6) and the lower damper plate spring split body (8), and a third small flat pad (15) is further provided between the upper damper plate spring split body (14) and the damper welding ring (17).
7. The free piston stirling cooler passive damper for a cryocooler according to claim 1 wherein a concave notch is provided in the damper weld ring (17), said concave notch being capable of avoiding the outgoing line of the linear motor of the cooler.
8. The free piston stirling cooler passive damper for a cryocooler according to claim 7 wherein a step is provided inside the cooler housing (22), the damper welding ring (17) is fixed on the step in a snap fit manner, and the damper welding ring (17) is fixed to the cooler housing (22) in a welded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210131866.0A CN114484915A (en) | 2022-02-14 | 2022-02-14 | Passive shock absorber of free piston Stirling refrigerator for low-temperature refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210131866.0A CN114484915A (en) | 2022-02-14 | 2022-02-14 | Passive shock absorber of free piston Stirling refrigerator for low-temperature refrigerator |
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| CN114484915A true CN114484915A (en) | 2022-05-13 |
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| CN202210131866.0A Pending CN114484915A (en) | 2022-02-14 | 2022-02-14 | Passive shock absorber of free piston Stirling refrigerator for low-temperature refrigerator |
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Cited By (1)
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| CN115143659A (en) * | 2022-06-29 | 2022-10-04 | 宁波钜心低温科技有限公司 | Stirling cooler |
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| CN111043234A (en) * | 2019-11-18 | 2020-04-21 | 上海厚酷科技有限公司 | Vibration absorber |
| CN111322782A (en) * | 2020-03-26 | 2020-06-23 | 深圳市开迩文科技有限公司 | Large-cold-capacity small Stirling refrigerator |
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2022
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| CN1993567A (en) * | 2004-08-02 | 2007-07-04 | 夏普株式会社 | Vibration inhibition device and stirling engine having the same |
| CN111043234A (en) * | 2019-11-18 | 2020-04-21 | 上海厚酷科技有限公司 | Vibration absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143659A (en) * | 2022-06-29 | 2022-10-04 | 宁波钜心低温科技有限公司 | Stirling cooler |
| CN115143659B (en) * | 2022-06-29 | 2024-06-14 | 宁波钜心低温科技有限公司 | Stirling cooler |
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