Novel backheating structure

Abstract

The invention provides a novel backheating structure and belongs to the technical field of Stirling motors. The novel backheating structure comprises a piston which is hollow and provided with a filler, a cold end ventilation hole is formed in the end face of one end, close to a cold end, of the piston, a hot end ventilation hole is formed in the side wall of one end, close to a hot end, of the piston, a hot end air guide ring with an air guide passage corresponding to the hot end ventilation hole sleeves the outer side of the piston, two ends of the air guide passage are respectively connected with the hot end ventilation hole and a Stirling motor hot end, an air guide groove is formed in the hot end ventilation hole, and an end plug with a bevel is arranged at the hot end ventilation hole in the piston. By arranging the filler in the hollow piston, a backheating function is realized, and heat leakage of a shell and the inside of the piston is reduced; by arranging the air guide groove, the hot end ventilation hole in the piston is constantly communicated with the hot end air guide ring, so that gas flow continuity is ensured; by arranging the piston with a cold end face being a plane and the shell, dead volume is eliminated, and performance is improved.

Description

technical field [0001] The invention relates to the technical field of Stirling motors, in particular to a novel heat recovery structure. Background technique [0002] The Stirling motor has a cold end and a hot end, and the gas needs to pass through the heat recovery structure when flowing between the cold end and the hot end. Therefore, improving the performance of the heat recovery structure of the Stirling motor is the focus of current research. [0003] At present, the heat recovery structure of Stirling motors on the market includes a heat sink at the hot end and a heat sink at the cold end, and a regenerator is arranged between the heat sink at the hot end and the heat sink at the cold end, and the heat sink at the hot end and the heat sink at the cold end The heat sink and the regenerator are ring-shaped and sleeved on the passage of the piston movement, so that the gas can continuously pass between the heat sink at the hot end, the regenerator and the radiator at th...

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Problems solved by technology

[0003] At present, the heat recovery structure of Stirling motors on the market includes a heat sink at the hot end and a heat sink at the cold end, and a regenerator is arranged between the heat sink at the hot end and the heat sink at the cold end, and the heat sink at the hot end and the heat sink at the cold end The heat sink and the regenerator are ring-shaped and sleeved on the passage of the piston movement, so that the gas can continuously pass between the heat sink at the hot end, the regenerator and the radiator at the cold end under the action of the piston to release energy. , this heat recovery structure is set between the cold end and the hot end of the Stirling motor, and is also sleeved outside the piston, resulting in a larger volume of the cold end and part of the hot end of the Stirling motor, resulting in a larger shell volume Increase, increase the heat leakage area, at the same time, the piston of the current heat recovery structure is hollow, the heat will be conducted through the hollow inside the piston, which will also increase the heat leakage area, and the cold end of the shell is due to the piston Due to the structure of the cold end, the piston cannot fully reach the top of the cold end and fit on the top surface of the cold end, resulting in a partial dead volume, and the air in the dead volume does not do work. These factors have a great impact on the performance of the Stirling motor

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