CN215597813U

CN215597813U - Magnetic centering long-life Stirling refrigerating machine

Info

Publication number: CN215597813U
Application number: CN202121128529.3U
Authority: CN
Inventors: 黄立; 许思哲; 郭亚军; 杨益; 刘文吉; 李晓永; 黄太和; 王立保
Original assignee: Wuhan Gaoxin Technology Co Ltd
Current assignee: Wuhan Gaoxin Technology Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-21
Anticipated expiration: 2031-05-25

Abstract

The utility model relates to a magnetic centering long-life Stirling refrigerator which comprises a cylinder, a piston capable of reciprocating in the cylinder body of the cylinder, a universal bearing capable of driving the piston to be finely adjusted and a magnet assembly used for adjusting the center position of the piston, wherein the piston and the cylinder body are separated by the magnetism of the magnet assembly. The utility model realizes the adjustment of the compression piston by the universal bearing technology, realizes the rotary Stirling refrigerator structure of the axial centering of the compression cylinder piston by the magnetic centering technology, integrates the magnetic centering and the universal bearing adjusting function, reduces the abrasion between the piston and the cylinder, and has the advantages of high reliability and long service life. In the reciprocating motion process of the compression piston driven by the motor, the compression piston of the compressor is centered by the magnetic force of the magnetic steel between the piston magnetic steel and the cylinder magnetic steel, and the long-term reliability of the compressor is improved. The piston and cylinder are made of self-lubricating engineering plastics, so that the piston and cylinder have the characteristics of being processed and free of powder pollution, and solid pollution and abrasion are prevented.

Description

Magnetic centering long-life Stirling refrigerating machine

Technical Field

The utility model relates to the technical field of rotary Stirling compressors, in particular to a magnetic centering long-life Stirling refrigerating machine.

Background

The Stirling refrigerator is widely applied to civil and military equipment such as thermal infrared imagers, infrared foresight and night vision, missile guidance, space application and the like.

The traditional rotary Stirling refrigerator adopts a needle bearing or a deep groove ball bearing, a compression pin shaft and a stable spring to realize the connection of a compression piston and a compression connecting rod, the installation center of the compression piston is ensured by adjusting the symmetry degree of the compression piston and the connecting rod, the support of the piston is realized by a stable pressure spring, but the piston is limited by the processing precision and the assembly level of parts, the piston and a cylinder cannot be completely centered, the abrasion cannot be eliminated, meanwhile, in order to improve the wear resistance of the piston cylinder, the requirements on the hardness and the roughness of the parts are high, the processing difficulty of the parts is greatly improved, the piston usually adopts alloy steel heat treatment, the hardness is HRC60 or more, the processing is difficult, meanwhile, a DLC or TiN coating is plated on the surface, the abrasion is easy to drop powder, and accelerated abrasion, pollution and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a magnetic centering long-life Stirling refrigerator, which reduces abrasion caused by hard contact of a cylinder piston due to installation deviation and part machining precision and improves long-term reliability of a rotary Stirling refrigerator through a magnetic centering technology.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the Stirling refrigerator with the magnetic pair and the long service life comprises a cylinder, a piston capable of reciprocating in a cylinder body of the cylinder, a universal bearing capable of driving the piston to be finely adjusted and a magnet assembly used for adjusting the center position of the piston, wherein the piston is separated from the cylinder body through the magnetic assembly.

Further, the magnet assembly is including installing cylinder magnet steel on the cylinder body of cylinder and installing piston magnet steel on the piston, the upper and lower side of cylinder body all is equipped with cylinder magnet steel, the correspondence of piston the upper and lower both sides of cylinder body all are equipped with piston magnet steel, arbitrary all have the interval between cylinder magnet steel and its adjacent piston magnet steel, cylinder magnet steel with piston magnet steel's magnetism is the same.

Further, still include for the reciprocating motion of piston provides the eccentric pivot of drive power, eccentric pivot be located one side of cylinder and with the cylinder setting, eccentric pivot passes through motor drive.

Further, the device also comprises a connecting rod which is connected with the eccentric rotating shaft and the piston, and the piston is connected with the connecting rod through a pin shaft.

Further, still include base and end cover, the base with the end cover encloses to close and forms the confession the cylinder, the piston, universal bearing, magnet subassembly and the holding chamber that eccentric rotating shaft settled.

Furthermore, a balance block is arranged between the eccentric rotating shaft and the base.

Further, the piston magnetic steel and the cylinder magnetic steel are both annular magnetic steels.

Further, the length of the piston magnetic steel is smaller than that of the cylinder magnetic steel.

Further, the piston and the piston magnetic steel are fixed through viscose, and the cylinder magnetic steel and the cylinder body are also fixed through viscose.

Further, the piston is a self-lubricating engineering plastic piston; the cylinder is a self-lubricating engineering plastic cylinder.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a magnetic centering long-life stirling refrigerator to the adjustable of compression piston is realized to the universal bearing technique, and the rotatory stirling refrigerator structure of the axle centering of compression cylinder piston is realized to the magnetic centering technique, synthesizes magnetic force centering, and universal bearing regulating action has reduced the wearing and tearing between piston and cylinder, has the reliability height, long-life advantage. In the reciprocating motion process of the compression piston driven by the motor, the compression piston of the compressor is centered by the magnetic force of the magnetic steel between the piston magnetic steel and the cylinder magnetic steel, and the long-term reliability of the compressor is improved. The piston and cylinder are made of self-lubricating engineering plastics, so that the piston and cylinder have the characteristics of being processed and free of powder pollution, and solid pollution and abrasion are prevented.

Drawings

FIG. 1 is a schematic diagram of a magnetically-centered long-life Stirling cryocooler according to an embodiment of the present invention;

in the reference symbols: 1-end cap; 2-a piston; 3-piston magnetic steel; 4-a cylinder; 5-cylinder magnetic steel; 6-universal bearing; 7-a pin shaft; 8-eccentric rotating shaft; 9-a balance weight; 10-a connecting rod; 11-a support bearing; 12-a base; a-vertical line segment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a magnetic centering long-life stirling cryocooler, including a cylinder 4, a piston 2 capable of reciprocating in the cylinder of the cylinder 4, a universal bearing 6 capable of driving the piston 2 to be finely adjusted, and a magnet assembly for adjusting the center position of the piston 2, wherein a magnetic gap between the piston 2 and the cylinder passes through the magnet assembly. In the embodiment, the universal bearing 6 technology is used for realizing the adjustability of the compression piston 2, the magnetic centering technology is used for realizing the rotary Stirling refrigerator structure in the shaft centering of the compression cylinder piston, the magnetic centering is integrated, the universal bearing 6 has the adjusting effect, the abrasion between the piston 2 and the cylinder 4 is reduced, and the device has the advantages of high reliability and long service life. Preferably, the magnet subassembly is including installing cylinder magnet steel 5 on the cylinder body of cylinder 4 and installing piston magnet steel 3 on the piston 2, the last downside of cylinder body all is equipped with cylinder magnet steel 5, the correspondence of piston 2 the upper and lower both sides of cylinder body all are equipped with piston magnet steel 3, arbitrary all have the interval between cylinder magnet steel 5 and its adjacent piston magnet steel 3, cylinder magnet steel 5 with piston magnet steel 3's magnetism is the same. Wherein, piston 2 reciprocating motion to universal bearing 6 realizes the fine setting of piston magnet steel 3 and cylinder magnet steel 5's magnetism centering in-process, piston magnet steel 3 and cylinder magnet steel 5 have realized the contactless zero friction state reciprocating motion between piston 2 and cylinder 4, guaranteed that piston 2 reciprocates at the compression center all the time, the wearing and tearing between the cylinder piston have been reduced, piston 2 and cylinder 4 are all preferred to be the preparation of lubricating characteristic engineering plastics simultaneously, this material is current material, it can reduce the cylinder 4 and 2 surfacing difficulty and coating pollution of piston, stirling refrigerator's reliability has been promoted. The piston magnetic steel 3 and the cylinder magnetic steel 5 have the same magnetism, and the center position of the piston 2 is finely adjusted by the magnetic force between the cylinder magnetic steel 5 and the piston magnetic steel 3, so that the hard contact between the piston 2 and the cylinder 4 is prevented. In addition, as shown in fig. 1, the piston has a smaller yawing motion than the vertical line segment a in the drawing.

As an optimized scheme of the embodiment of the present invention, please refer to fig. 1, the refrigerator further includes an eccentric rotating shaft 8 for providing a driving force for the reciprocating motion of the piston 2, the eccentric rotating shaft 8 is located at one side of the cylinder 4 and is disposed with the cylinder 4, and the eccentric rotating shaft 8 is driven by a motor. In the present embodiment, the motor drives the eccentric rotating shaft 8 to rotate, and the rotating motion of the eccentric rotating shaft 8 is converted into the reciprocating motion of the piston 2. This movement is conventional in the art and its specific workflow will not be described in detail here.

Referring to fig. 1 as an optimized scheme of the embodiment of the present invention, the refrigerator further includes a connecting rod 10 connecting the eccentric rotating shaft 8 and the piston 2, and the piston 2 and the connecting rod 10 are connected by a pin 7. In this embodiment, the transmission is performed by a connecting rod 10, wherein the eccentric bearing falls on a support bearing 11, the support bearing 11 is a deep groove ball bearing, and the support bearing 11, the universal bearing bush and the connecting rod 10 are bonded by glue.

As an optimized scheme of the embodiment of the present invention, please refer to fig. 1, the refrigerator further includes a base 12 and an end cover 1, and the base 12 and the end cover 1 enclose to form an accommodating cavity for accommodating the cylinder 4, the piston 2, the universal bearing 6, the magnet assembly, and the eccentric rotating shaft 8. In this embodiment, the whole refrigerator structure is transversely arranged, the cylinder 4 is arranged on the left side of the eccentric rotating shaft 8, the eccentric rotating shaft 8 and the cylinder 4 are both arranged on the base 12, and then the end cover 1 is tightly covered to form an accommodating cavity. Preferably, a balance weight 9 is arranged between the eccentric rotating shaft 8 and the base 12, so that a balancing effect can be achieved.

As an optimized scheme of the embodiment of the present invention, please refer to fig. 1, the piston magnetic steel 3 and the cylinder magnetic steel 5 are both annular magnetic steels. Preferably, the length of the piston magnetic steel 3 is smaller than that of the cylinder magnetic steel 5. The piston 2 and the piston magnetic steel 3 are fixed through viscose, and the cylinder magnetic steel 5 and the cylinder body are also fixed through viscose. The length of the piston magnetic steel 3 is smaller than that of the cylinder magnetic steel 5, so that the piston 2 is ensured to move back and forth, and the piston magnetic steel 3 is in the magnetic field of the cylinder magnetic steel 5. Piston magnet steel 3 and piston 2 pass through the viscose fixed, guarantee the axiality of

piston magnet steel

3 and 2 excircles of piston, cylinder magnet steel 5 with the cylinder body is also fixed through the viscose, just also can guarantee the axiality of the two.

Referring to fig. 1, as an optimized scheme of the embodiment of the present invention, the center positions of the connecting rod 10 and the piston 2 are controlled by a spacer, and the coaxiality and the verticality of the cylinder 4 and the base 12 are ensured by controlling the gap between the base 12 and the cylinder 4.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A magnetic centering long-life Stirling refrigerator is characterized in that: the piston-type air conditioner comprises an air cylinder, a piston capable of reciprocating in the cylinder body of the air cylinder, a universal bearing capable of driving the piston to be finely adjusted and a magnet assembly for adjusting the center position of the piston, wherein the piston is separated from the cylinder body through the magnetism of the magnet assembly.

2. A magnetically centered long life stirling cooler as claimed in claim 1 wherein: the magnet assembly comprises cylinder magnetic steel arranged on a cylinder body of the cylinder and piston magnetic steel arranged on the piston, the upper side and the lower side of the cylinder body are respectively provided with the cylinder magnetic steel, the piston corresponds to the upper side and the lower side of the cylinder body and is respectively provided with the piston magnetic steel, the piston magnetic steel is optional, an interval is arranged between the cylinder magnetic steel and the adjacent piston magnetic steel, and the cylinder magnetic steel is the same as the piston magnetic steel in magnetism.

3. A magnetically centered long life stirling cooler as claimed in claim 1 wherein: still include for the reciprocating motion of piston provides the eccentric pivot of drive power, eccentric pivot be located one side of cylinder and with the cylinder sets up, eccentric pivot passes through motor drive.

4. A magnetically-centered, long-life stirling cooler, as claimed in claim 3, wherein: the piston is connected with the connecting rod through a pin shaft.

5. A magnetically-centered, long-life stirling cooler, as claimed in claim 3, wherein: the piston is arranged in the cylinder, the piston is arranged in the piston, the universal bearing is arranged in the piston, the magnet assembly is arranged in the magnet assembly, and the eccentric rotating shaft is arranged in the magnet assembly.

6. A magnetically-centered, long-life stirling cooler, as claimed in claim 5, wherein: and a balance block is arranged between the eccentric rotating shaft and the base.

7. A magnetically-centered, long-life stirling cooler, as claimed in claim 2, wherein: the piston magnetic steel and the cylinder magnetic steel are both annular magnetic steels.

8. A magnetically-centered, long-life stirling cooler, as claimed in claim 2, wherein: the length of the piston magnetic steel is smaller than that of the cylinder magnetic steel.

9. A magnetically-centered, long-life stirling cooler, as claimed in claim 2, wherein: the piston is fixed with the piston magnetic steel through an adhesive, and the cylinder magnetic steel is fixed with the cylinder body through an adhesive.

10. A magnetically centered long life stirling cooler as claimed in claim 1 wherein: the piston is a self-lubricating engineering plastic piston; the cylinder is a self-lubricating engineering plastic cylinder.