LARGE-COOLING-CAPACITY INTEGRATED STIRLING PNEUMATIC REFRIGERATOR SUPPORTED BY LARGE-STROKE COLUMN SPRINGS

Abstract

A large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs, consisting of an active vibration absorber, a motor, a coaxial type compression-expansion piston, a compression piston column spring, an expansion piston column spring, a hot-end radiator, a cylinder wall, a housing, and a cold finger, wherein the coaxial compression-expansion piston is composed of a compression piston and an expansion piston, the expansion piston is nested in the compression piston, and the compression piston and the expansion piston share one hot-end radiator; the compression piston is driven by a motor, and the expansion piston is driven by gas force and no motor drive is required. The compression piston and the expansion piston are both supported by column springs, the column spring provides an axial restoring force for the coaxial type compression-expansion piston. The active vibration absorber is installed at the tail part of the housing.

Claims

1. A large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs, comprising an active vibration absorber (1), a motor (2), a coaxial type compression-expansion piston (3), a compression piston column spring (4), an expansion piston column spring (5), a hot-end radiator (6), a housing (7), a cold finger (8), and a cylinder wall (9), wherein the active vibration absorber (1) is connected to the tail part of the housing (7); the top of the motor (2) is connected to a compression piston (3-1), the inner side of the motor (2) is connected to the cylinder wall (9), and the external of the motor (2) is connected to the housing (7); one end of the compression piston column spring (4) is connected to the housing (7), and the other end of the compression piston column spring is connected to the compression piston (3-1); one end of the expansion piston column spring (5) is connected to an expansion piston (3-2), and the other end of the expansion piston column spring is connected to the housing (7); one end of the hot-end radiator (6) is connected to the housing (7) and the cylinder wall (9), and the other end of the hot-end radiator is connected to the cold finger (8).

2. The large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs according to claim 1, wherein the active vibration absorber (1) is driven by a moving-coil type linear motor.

3. The large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs according to claim 1, wherein the motor (2) is a moving-coil type motor, and comprises a coil connecting block (2-1), a magnetic pole (2-2), magnetic steel (2-3), and a moving coil (2-4); one end of the coil connecting block (2-1) is connected to the moving coil (2-4), and the other end of the coil connecting block is connected to the compression piston (3-1); and the magnetic steel (2-3) is connected to the magnetic pole (2-2).

4. The large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs according to claim 1, wherein the coaxial type compression-expansion piston (3) comprises the compression piston (3-1) and the expansion piston (3-2), the compression piston (3-1) and the expansion piston (3-2) in the coaxial type compression-expansion piston (3) are integrally arranged, and the expansion piston (3-2) is nested in the compression piston (3-1).

5. The large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs according to 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 gas path (3-1-2), a compression piston throttle hole (3-1-3), and a compression piston check valve (3-1-4).

6. The large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs according to 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 throttle hole (3-2-2), an expansion piston gas path (3-2-3), and an expansion piston check valve (3-2-4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a structure diagram of the present disclosure;

[0014] FIG. 2 is a structure diagram of an active vibration absorber;

[0015] FIG. 3 is a structure diagram of a motor;

[0016] FIG. 4 is a structure diagram of a coaxial type compression-expansion piston;

[0017] FIG. 5 is a structure diagram of a compression piston;

[0018] FIG. 6 is a structure diagram of an expansion piston;

[0019] In the drawings: 1—active vibration absorber; 2—motor; 2-1—coil connecting block; 2-2—magnetic pole; 2-3—magnetic steel; 2-4—moving coil; 3—coaxial type compression-expansion piston; 3-1—compression piston; 3-1-1—compression piston body; 3-1-2—compression piston gas path; 3-1-3—compression piston throttle hole; 3-1-4—compression piston check valve; 3-2—expansion piston; 3-2-1—expansion piston body; 3-2-2—expansion piston throttle hole; 3-2-3—expansion piston gas path; 3-2-4—expansion piston check valve; 4—compression piston column spring; 5—expansion piston column spring; 6—hot-end radiator; 7—housing; 8—cold finger; 9—cylinder wall.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] One embodiment of the present disclosure is introduced below with reference to the accompanying drawings of the present disclosure:

[0021] as shown in FIG. 1 to FIG. 6, the embodiment discloses a 30 W@80K large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs. A compressor inputs electric work of more than 400 W, the Stirling pneumatic refrigerator comprises an active vibration absorber 1, a motor, 2, a coaxial type compression-expansion piston 3, a compression piston column spring 4, an expansion piston column spring 5, a hot-end radiator 6, a housing 7, a cold finger 8, and a cylinder wall 9.

[0022] The active vibration absorber 1 is connected to the tail part of the housing 7, a compression piston 3-1 and an expansion piston 3-2 are coaxially arranged and share one hot-end radiator 6; the overall refrigerator is coaxially arranged; thus, the gas is uniformly distributed in the axial direction, no radial component exists, and the radial flutter force is small.

[0023] The compression piston 3-1 has a diameter of φ24 mm and is connected to a column spring, and the column spring may reach a unilateral stroke of 15 mm within the allowable stress range. The expansion piston 3-2 has a diameter of φ20 mm and is connected to a column spring, and the column spring may reach a unilateral stroke of 6 mm within the allowable stress range.

[0024] The motor 2 is a moving-coil type motor, wraps the periphery of the cylinder wall 9, and is connected to the compression piston 3-1 through a coil connecting block 2-1, wherein a magnetic pole 2-2 and magnetic steel 2-3 are annularly fixed to the inner wall of the housing 7 to generate a constant magnetic field; the moving coil 2-4 is connected to the compression piston 3-1; and when single-phase alternating current is introduced into the moving coil 2-4, alternating electromagnetic force is generated, and the moving coil 2-4 can move under the action of the magnetic field, thus driving the compression piston 3-1 to realize circular reciprocating motion, and making a gas working medium be expanded and compressed.

[0025] The compression piston 3-1 and the expansion piston 3-2 of the coaxial type compression-expansion piston 3 are integrally arranged, and the expansion piston 3-2 is nested in the compression piston 3-1 to reduce the radial force to the greatest extent.

[0026] Those skilled in the art should know that the embodiments of the present disclosure have been described in detail based on the above drawings, the present disclosure is not limited to above embodiments, and without departing from the principle and spirit of the present disclosure, the corresponding changes, improvements, and optimizations of the present disclosure are within the scope of protection of the present disclosure.