Free piston Stirling engine

Abstract

The invention relates to the technical field of engines, in particular to a free piston Stirling engine. The free piston Stirling engine comprises two Stirling mechanisms which are oppositely arranged, a heat source is arranged between the two Stirling mechanisms; each Stirling mechanism comprises a shell and a heat pipe type heater; a communicating pipeline is connected between the two Stirling mechanisms; the communicating pipeline communicates with two expansion cavities or two compression cavities or two back cavities, the heat pipe type heater comprises a heater body and a plurality of heat pipes, the condensation ends of the heat pipes are correspondingly arranged in heat pipe embedding holes, and the evaporation ends of the heat pipes penetrate through the shell to be connected withthe heat source. The free piston Stirling engine is compact in structure, vibration of the engine is reduced, each Stirling mechanism adopts a heat pipe type heater to achieve heat transmission, heatloss in energy transmission is effectively reduced, and the working efficiency of the engine is improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a free-piston Stirling engine. Background technique [0002] The free-piston Stirling engine is a closed-cycle piston engine with external heating, which has the advantages of simple structure, high efficiency and long life. As a key component of a free-piston Stirling engine, the heater has an important influence on engine performance. There are various specific structural forms of traditional heaters, among which finned heaters and shell-and-tube heaters are widely used. [0003] For finned heaters, the working medium inside the heater is usually gas, and the heat transfer working medium outside the heater is usually heat transfer fluid. The heat transfer fluid absorbs heat in the heat source and then transfers the heat to the gas to be heated in the heat exchanger. Because the finned heater is processed by wire cutting, not only the processing cost is high, but also the hei...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a free-piston Stirling engine, which solves the problems of complex energy transmission and large heat loss in the energy transmission of the heater in the existing engine, and the problem that a single Stirling engine is prone to relatively high temperature when working. big vibration problem

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