Opposed Stirling engine sharing single power piston

Abstract

A plate spring elastic body is mostly used in a gas back cavity of a power piston of the Stirling engine with the free piston, and due to the fact that the power piston is in a full-sealing structure, the gas back cavity is arranged in order to reduce gas back pressure of the power piston. According to the published patent application on March 8, 2024, two generators on the outer sides are combined into a whole and are arranged in the middle of the opposed Stirling engine, so that the cost and space of the generators are saved. The power pistons are further combined into one, and a complex combined power piston structure (sharing a single power piston) is saved, so that the material cost and the space are further saved. And the friction loss between the power piston and the cavity is further reduced.

Description

Technical Field

[0001] The field of Stirling engines with opposed free pistons. Background Art

[0002] In the gas back cavity of the power piston of a Stirling engine with a free piston, a leaf spring elastomer is often used. Since the power piston is in a fully sealed structure, a gas back cavity is provided to reduce the gas back pressure of the power piston. A patent application published on March 8, 2024, combines the two outer generators into one and arranges them in the middle of the opposed engine to save the cost and space of the generator. However, there are still 2 power pistons and 2 gas back cavities for the power pistons. This application further combines the power pistons into one, saving the complex structure of the combined power piston (sharing a single power piston) to further save material costs and space. And it further reduces the frictional loss between the power piston and the cavity. Summary of the Invention

[0003] Feature 1: Sharing a single power piston.

[0004] Feature 2: Canceling the leaf spring.

[0005] Feature 3: Canceling the gas back cavity of the power piston.

[0006] Feature 4: The two-in-one power piston (the two-in-one is the power pistons 102, 103 and the others 104, 105, 106, 107, 108 in Figure 1) and (canceling the gas back cavities 1012, 1013 of the power piston). Description of the Drawings

[0007] Figure 1 It is a structural diagram of an opposed free piston Stirling engine, 10 housing, 1011 left compression cavity, 1012 back cavity, 1013 right compression cavity, 102 left power piston, 103 right power piston, 104 connecting rod, 105 left universal joint, 106 right universal joint, 107 bracket, 108 permanent magnet, 109 outer stator, 110 left cylinder, 112 right cylinder, 20 left heat-work converter, 201 heat exchanger, 202 regenerator, 203 heat exchanger, 204 gas distribution piston, 30 right heat-work converter.

[0008] Figure 2 It is a structural diagram of an existing opposed free piston Stirling engine.

[0009] Figure 3 It is a position diagram of the leaf spring elastomer 13 (on the left side in the left back cavity) in the gas back cavity.

[0010] Figure 4 It is a structural diagram of the combined generators as of March 8, 2024.

Claims

1. Feature 1 shares a single power piston.

2. Feature 2 eliminates the leaf spring.

3. Feature 3 eliminates the piston back cavity for power.

4. The two-in-one power piston (the two-in-one is the power pistons 102, 103 and the others 104, 105, 106, 107, 108 in Figure 1) and (eliminates the gas back cavities 1012, 1013 of the power pistons).

Images