Novel guide device of multistage Stirling engine piston

Abstract

The invention provides a novel guide device of a multistage Stirling engine piston. The guide device comprises a stabilizing structure, an anti-collision anti-vibration pad and a piston positioning spring, wherein the stabilizing structure consists of a collaborative vibration connecting rod, a stabilizing guide rod and a guide block. In the stabilizing structure, one end of a collaborative vibration connecting rod is connected with a piston of the multi-stage Stirling engine, the other end of the collaborative vibration connecting rod is connected with a stabilizing guide rod, and guide blocks are installed on the two sides of the stabilizing guide rod. The piston transmits motion to the stable guide rod through the connecting rod, the motion of the stable guide rod is restrained by the guide block, and meanwhile the motion is fed back to the piston through the connecting rod, so that the piston achieves stable axial motion. By means of structural design and parameter optimization, stable axial movement without radial deviation of the Stirling engine piston is achieved, the piston guiding problem caused by the fact that a multi-stage Stirling engine is not provided with a piston rod is solved, the Stirling engine operates stably, and the service life of the Stirling engine is greatly prolonged.

Description

Technical field: [0001] The invention belongs to the field of multi-stage Stirling machines, in particular to a novel guide device for a piston of a multi-stage Stirling machine. Background technique: [0002] Stirling machine is an ideal power generation device. For the problem that a large amount of industrial waste heat cannot be used economically and efficiently, especially for small and medium-scale (generally 2MW and below) combined heat and power projects, waste-to-energy projects, etc., the application of Stirling machines as power generation equipment has received extensive attention. [0003] Aiming at the problems of the existing double-acting free-piston Stirling machine with complex equipment structure, large ineffective volume, poor piston adjustability, and poor anti-interference ability, someone proposed a new structure of multi-stage Stirling machine. . The multi-stage Stirling machine realizes the functions of simple structure, high energy transmission ef...

AI Technical Summary

Problems solved by technology

[0004] But this novel multi-stage Stirling machine also has corresponding problems: the multi-stage Stirling machine is connected up and down due to a plurality of Stirling units, which causes a larger space height requirement; the multi-stage Stirling machine Part of the piston is set between the hot and cold chambers without a piston rod. The traditional piston guide method requires two guide rings with a certain distance on the piston, which will further increase the overall height of the engine and increase the complexity of the piston structure; The practice of adopting two guide rings will make one of the guide rings and the corresponding sealing rings be in a higher temperature position, and additional cooling devices are required to protect the sealing rings and guide rings

[0005] In order to overcome the problem that the piston guide device of the multi-stage Stirling machine increases the overall height of the engine and requires protective cooling, the present invention proposes a multi-stage Stirling machine with strong adjustability and high stability, which can be applied to different diameters of the multi-stage Stirling machine The new guide device can replace the guide ring with a flat guide block at the same time, which reduces the difficulty of manufacturing the guide device

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