A Split Free Piston Stirling Engine

Abstract

The invention relates to a split type free piston stirling engine which comprises a hot cylinder and a cold cylinder which are arranged in parallel, wherein the hot cylinder is provided with a piston, and the cold cylinder is provided with a piston, the top portion of the cold cylinder is communicated with a heat regenerator, and a hot end spring is installed inside the hot cylinder corresponding to the bottom of the hot piston. A coil hoop is installed inside the cold cylinder corresponding to the bottom of the cold piston, the coil hoop is in a shape of a hub, the coil hoop and the cold cylinder are coaxial in the coaxial direction, and a coil and a cold end spring are arranged on the outside of the coil hoop. A screwed hole is arranged at the bottom of the cold piston, an installation column and the screwed hole are installed in a matched mode, magnet installation grooves are arranged on a column body on the lower portion of the installation column, a magnet block is installed in each magnet installation groove, and the lower portion of the installation column is inserted in the coil hoop. The running mechanism of the split type free piston stirling engine is partial to the thermoacoustic type stirling engine mechanism, namely heat transfer delay caused by inconvertibility of circulation causes phase difference of thermodynamic and kinetic, and a Stirling circulation composed of four thermodynamic processes of isothermal expansion, isasteric cooling, isothermal compression and isasteric temperature rise is constructed through the phase difference.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a free-piston Stirling engine. Background technique [0002] As low-carbon environmental protection has gradually become the consensus of the international community, Stirling engine, as an environmentally friendly engine, not only has a promising prospect of using solar energy and geothermal energy for power generation, but also has great potential in the utilization of other energy fields. In the new energy era , it is bound to play a more comprehensive role. The ideal thermodynamic cycle of a Stirling engine is composed of constant volume heating, isothermal expansion, constant volume cooling, and isothermal compression. The actual cycle is affected by factors such as mechanical power, heat transfer, and working medium flow loss, which deviates from the theoretical cycle. . The Stirling engine adopts a split structure, which can effectively avoid shuttle loss and...

AI Technical Summary

Problems solved by technology

Although the Stirling engine driven by the swash plate reduces part of the lateral friction loss of the piston, the friction loss at the swash plate increases sharply, and its mechanical structure is complex and the processing cost is high.

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