阅读说明：本技术 一种大行程柱弹簧支撑的大冷量集成式斯特林气动制冷机 (Large-stroke column spring-supported large-cooling-capacity integrated Stirling pneumatic refrigerator ) 是由 蒋珍华 吴亦农 黄政 吴文萃 商丹枫 陈钏 曲晓萍 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种大行程柱弹簧支撑的大冷量集成式斯特林气动制冷机,由主动减振器、电机、同轴式压缩膨胀活塞、压缩活塞柱弹簧、膨胀活塞柱弹簧、热端散热器、气缸壁、壳体、冷指构成,同轴式压缩膨胀活塞由压缩活塞和膨胀活塞组成,膨胀活塞嵌套在压缩活塞里,压缩活塞和膨胀活塞共用一个热端散热器,压缩活塞由双线圈直线电机驱动,膨胀活塞由气体力驱动,无电机驱动。压缩活塞和膨胀活塞均采用柱弹簧支撑,柱弹簧为同轴式压缩膨胀活塞提供轴向回复力,确保达到轴向较大的运动行程,实现制冷机的大制冷量。主动减振器安装在壳体尾部,与压缩活塞、膨胀活塞同轴安装。本发明优点是：大行程、大冷量、结构紧凑,振动小。(The invention discloses a large-cold-capacity integrated Stirling pneumatic refrigerator supported by a large-stroke column spring, which consists of an active shock absorber, a motor, a coaxial compression expansion piston, a compression piston column spring, an expansion piston column spring, a hot-end radiator, a cylinder wall, a shell and a cold finger, wherein the coaxial compression expansion piston consists of a compression piston and an expansion piston, the expansion piston is nested in the compression piston, the compression piston and the expansion piston share the hot-end radiator, the compression piston is driven by a double-coil linear motor, and the expansion piston is driven by gas force without motor drive. The compression piston and the expansion piston are supported by a column spring, and the column spring provides axial restoring force for the coaxial compression expansion piston, so that the axial large movement stroke is ensured, and the large refrigerating capacity of the refrigerator is realized. The active vibration absorber is arranged at the tail part of the shell and is coaxially arranged with the compression piston and the expansion piston. The invention has the advantages that: large stroke, large cooling capacity, compact structure and small vibration.)

1. The utility model provides a big cold volume integrated form stirling pneumatic cooler that big stroke post spring supported, includes initiative shock absorber (1), motor (2), coaxial-type compression expansion piston (3), compression piston post spring (4), expansion piston post spring (5), hot junction radiator (6), casing (7), cold finger (8) and cylinder wall (9), its characterized in that:

the active vibration absorber (1) is connected with the tail of the shell (7); the top of the motor (2) is connected with the compression piston (3-1), the inner side of the motor (2) is connected with the cylinder wall (9), and the outer part of the motor (2) is connected with the shell (7); one end of a compression piston column spring (4) is connected with the shell (7), and the other end of the compression piston column spring is connected with the compression piston (3-1); one end of an expansion piston column spring (5) is connected with the expansion piston (3-2), and the other end is connected with the shell (7); one end of the hot end radiator (6) is connected with the shell (7) and the cylinder wall (9), and the other end is connected with the cold finger (8).

2. A large capacity integrated stirling gas cooler supported by a large stroke column spring according to claim 1 wherein the active damper (1) is driven by a moving coil linear motor.

3. The large capacity integrated stirling pneumatic cooler of claim 1 wherein the large stroke column spring supported large capacity integrated stirling gas cooler is: the moving-coil-type-arranged motor (2) comprises a coil connecting block (2-1), a magnetic pole (2-2), magnetic steel (2-3) and a moving coil (2-4), wherein one end of the coil connecting block (2-1) is connected with the moving coil (2-4), and the other end of the coil connecting block (2-1) is connected with a compression piston (3-1); the magnetic steel (2-3) is connected with the magnetic pole (2-2).

4. The large capacity integrated stirling pneumatic cooler of claim 1 wherein the large stroke column spring supported large capacity integrated stirling gas cooler is: the coaxial compression piston expansion piston (3) comprises a compression piston (3-1) and an expansion piston (3-2), the compression piston (3-1) and the expansion piston (3-2) in the coaxial compression piston expansion piston (3) are integrally arranged, and the expansion piston (3-2) is nested in the compression piston (3-1).

5. The large-capacity integrated Stirling pneumatic refrigerator supported by the large-stroke column spring as claimed in claim 4, wherein the compression piston (3-1) is supported by an air bearing and comprises a compression piston body (3-1-1), a compression piston air passage (3-1-2), a compression piston orifice (3-1-3) and a compression piston check valve (3-1-4).

6. The large capacity integrated Stirling pneumatic refrigerator supported by the large stroke column spring as claimed in claim 4, wherein: the expansion piston (3-2) is supported by an air bearing and comprises an expansion piston body (3-2-1), an expansion piston throttling hole (3-2-2), an expansion piston air passage (3-2-3) and an expansion piston one-way valve (3-1-4).

Technical Field

The invention relates to the field of refrigerators, in particular to a large-cold-capacity integrated Stirling pneumatic refrigerator supported by a large-stroke column spring.

Background

The prior regenerative refrigerator mainly adopts a plate spring for supporting space, because the plate spring is restrained by the limit of fatigue stress, the axial stroke of the plate spring is generally smaller, and the prior refrigerator generally adopts a large piston diameter to realize large refrigerating capacity, so that the weight and the volume of the refrigerator are heavy. In addition, most of the existing satellite-borne low-temperature Stirling refrigerators are separately arranged, and radial vibration is large due to the fact that radial gas force is asymmetric. The gas force of the integrated low-temperature refrigerating machine can realize radial symmetry due to coaxial arrangement, but the integrated refrigerating machine mostly adopts a moving magnet type linear motor with compact structure and high efficiency, and as shown by flutter force tests of Ball company on a sunpower GT refrigerating machine, the vibration output of passive vibration reduction is 28N, even if active vibration reduction is adopted, the vibration output still reaches 19N. The invention adopts the column spring to connect the coaxial compression piston expansion piston to realize the axial restoring force, can realize the large stroke movement of the small piston, realizes the large-cold-quantity refrigeration under the smaller volume of the refrigerator, adopts the air bearing to carry out the main radial support to realize the long-life abrasion-free operation, and adopts the moving coil motor to drive the compression piston, and the vibration of the compression piston is far smaller than that of the moving magnet. The invention can realize the advantages of large cooling capacity, small size, low vibration and long service life.

Disclosure of Invention

The invention aims to solve the technical problems of low integration level, high vibration, small refrigerating capacity and small stroke of a Stirling refrigerator, and provides a large-refrigerating-capacity integrated Stirling pneumatic refrigerator supported by a large-stroke column spring.

The technical scheme provided by the invention is as follows: a large-cold-capacity integrated Sterlin pneumatic refrigerator supported by a large-stroke column spring is characterized by comprising an active shock absorber 1, a motor 2, a coaxial compression piston and expansion piston 3, a hot-end heat exchanger 6, a cold finger 8, a shell 7, a cylinder wall 9, a compression piston column spring 4 and an expansion piston column spring 5.

The active shock absorber 1 is connected with the tail of the shell 7, the compression piston 3-1 and the expansion piston 3-2 are coaxially arranged and share the same hot end heat exchanger 6, the motor 2 is wrapped around the cylinder wall 9, and the motor 2 is connected with the compression piston 3-1 through the coil connecting block 2-1.

The moving-coil-type-arranged motor 2 is characterized by comprising 2-1 parts of coil connecting blocks, 2-2 parts of magnetic poles, 2-3 parts of magnetic steel and 2-4 parts of moving coils, wherein the 2-1 parts of the coil connecting blocks are connected with the 2-4 parts of the moving coils; the magnetic steel 2-3 is connected with the magnetic pole 2-2. The moving coil type coil rotor is not influenced by magnetic attraction force, so that the axial bias force is small.

The coaxial compression piston expansion piston 3 is characterized by comprising a compression piston 3-1 and an expansion piston 3-2. The coaxial compression piston expansion piston is characterized in that a compression piston 3-1 and an expansion piston 3-2 of the coaxial compression piston expansion piston 3 are integrally arranged, and the expansion piston 3-2 is nested in the compression piston 3-1, so that the radial force is reduced to the maximum extent.

The compression piston 3-1 is characterized by being supported by an air bearing and comprising a compression piston body 3-1-1, a compression piston air passage 3-1-2, a compression piston orifice 3-1-3 and a compression piston check valve 3-1-4.

The expansion piston 3-2 is characterized by being supported by an air bearing and comprising an expansion piston body 3-2-1, an expansion piston orifice 3-2-2, an expansion piston air passage 3-2-3 and an expansion piston one-way valve 3-2-4.

Compared with the prior art, the invention has the beneficial effects that:

the expansion piston 3-2 is nested in the compression piston 3-1, so that the expansion piston 3-2 and the compression piston 3-1 are integrally arranged. The active vibration damper 1 is arranged at the tail part of the shell 7, is coaxially arranged with the compression piston 3-1 and the expansion piston 3-2, and is used for actively damping the vibration output of the refrigerator in a high-order mode. The moving-coil linear motor has the advantages of small mass and low vibration, and the additional air bearing provides main radial bearing capacity to realize abrasion-free long-life operation. The compression piston 3-1 is supported by a compression piston column spring 4, the expansion piston 3-2 is supported by an expansion piston column spring 5, and the column springs provide axial restoring force for the coaxial compression piston and expansion piston 3, so that the axial large movement stroke of the compression piston 3-1 and the expansion piston 3-2 is ensured, and the large refrigerating capacity of the refrigerator is realized. The large-cold-capacity integrated Stirling pneumatic refrigerator based on the large-stroke column spring support has the advantages of high concentration degree, low vibration, large stroke and large cold capacity.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of an active damper;

FIG. 3 is a schematic view of a motor structure;

FIG. 4 is a schematic view of a coaxial compression piston and expansion piston;

FIG. 5 is a schematic view of a compression piston;

FIG. 6 is a schematic view of an expansion piston configuration;

in the figure: 1. an active vibration absorber; 2. a motor; 2-1, connecting blocks of coils; 2-2, magnetic poles; 2-3, magnetic steel; 2-4, moving coil; 3. a coaxial compression piston expansion piston; 3-1, compressing the piston; 3-1-1, compressing the piston body; 3-1-2, compressing a piston gas path; 3-1-3, compression piston orifice; 3-1-4, compressing the piston check valve; 3-2, an expansion piston; 3-2-1, an expansion piston body; 3-2-2, expansion piston orifice; 3-2-3, expansion piston gas circuit; 3-2-4, expansion piston check valve; 4. compressing the piston post spring; 5. an expansion piston post spring; 6. a hot end heat exchanger; 7. a housing; 8. cold fingers; 9. a cylinder wall.

Detailed Description

One embodiment of the present invention will be described below with reference to the accompanying drawings of the present specification:

as shown in fig. 1-6, the embodiment discloses a large-cold-capacity integrated stirling pneumatic refrigerator supported by a 30W @80K large-stroke column spring, wherein the compressor inputs more than 400W of electric power, and the large-cold-capacity integrated stirling pneumatic refrigerator comprises an active shock absorber 1, a motor 2, a coaxial compression piston expansion piston 3, a compression piston column spring 4, an expansion piston column spring 5, a hot-end heat exchanger 6, a shell 7, a cold finger 8 and a cylinder wall 9.

The active shock absorber 1 is connected with the tail of the shell 7, the compression piston 3-1 and the expansion piston 3-2 are coaxially arranged, share the same hot end heat exchanger 6, the refrigerator is integrally and coaxially arranged, gas is axially and uniformly distributed, no radial component exists, and the radial force is small.

The diameter of the compression piston 3-1 is phi 24mm, the column spring is connected, the unilateral stroke of the column spring can reach 15mm within the stress allowable range, the diameter of the expansion piston 3-2 is phi 20mm, and the unilateral stroke of the column spring can reach 6mm within the stress allowable range.

The motor 2 is arranged in a moving coil mode, the motor 2 is wrapped around a cylinder wall 9, the motor 2 is connected with the compression piston 3-1 through a coil connecting block 2-1, wherein the magnet 2-2 and the magnetic steel 2-3 are fixed on the inner wall of the shell 7 in an annular mode to generate a constant magnetic field, the moving coil 2-4 is connected with the compression piston 3-1, alternating electromagnetic force is generated when single-phase alternating current is introduced into the moving coil 2-4, the moving coil 2-4 can move under the action of the magnetic field, and therefore the compression piston 3-1 is driven to achieve circular reciprocating motion, and therefore gas working media are expanded and compressed.

The compression piston 3-1 and the expansion piston 3-2 of the coaxial compression piston expansion piston 3 are integrally arranged, and the expansion piston 3-2 is nested in the compression piston 3-1, so that the radial force is reduced to the maximum extent.

It should be understood by those skilled in the art that the embodiments of the present invention have been described in detail based on the drawings, and the present invention is not limited to the above embodiments, and modifications and improvements of the present invention are possible within the scope of the present invention without departing from the principle and spirit of the present invention.