Free Piston Stirling Generator

Abstract

The invention provides a free-piston Stirling generator which comprises a cylinder body, a linear oscillation motor, a power piston and a discharger which is arranged in the cylinder body. The power piston comprises a piston body and a tenon part, wherein the piston body is arranged in the cylinder body, and the tenon part is connected with a rotor of the linear oscillation motor. The discharger and the first end of the cylinder body form an expansion cavity, and the discharger and the power piston form a compression cavity. A hot end step is arranged on the inner wall of the expansion cavity, and a discharger protrusion is arranged at one end of the discharger far away from the power piston. A discharger step is arranged at the other end of the discharger close to the power piston, and a power piston protrusion is arranged at one end of the power piston close to the discharger. The free-piston Stirling generator can ensure that a strong gas spring and nonlinear consumption can be generated at the tops of the discharger and the cylinder body and between the discharger and the power piston when the discharger or the power piston exceeds the designed stroke due to accidents, accordingly mechanical collision is effectively avoided, the system structure is simplified and system reliability is improved.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a free-piston Stirling generator. Background technique [0002] The free-piston Stirling generator is made by a free-piston Stirling engine driving a linear motor. The free-piston Stirling engine adopts the positive Stirling cycle, which converts thermal energy into mechanical energy through the heating expansion of the working gas and the cooling compression, and its theoretical efficiency is equal to the Carnot cycle efficiency; the linear motor is rigidly connected with the power piston. The rotor cuts the lines of magnetic force and converts mechanical energy into electrical energy. This kind of engine has the characteristics of external combustion and closed cycle, the internal working gas is helium or hydrogen, and there is no mechanical transmission and oil lubrication device. Increasing the operating frequency of the free-piston Stirling generator to above 100Hz can ...

AI Technical Summary

Problems solved by technology

However, the additional mechanical or electronic control anti-collision measures adopted by the existing free-piston Stirling generators need to introduce external mechanisms, complex monitoring methods and restraint measures, the process is complicated, the design is difficult, and the reliability is low

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