Gas leakage-free control valve used for fuel cell or engine

Abstract

The invention relates to the technical field of leakage-free gas control valve equipment, and provides a gas leakage-free control valve used for a fuel cell or an engine. The gas leakage-free control valve comprises a driving device and a valve body. A motor output shaft is connected with a driving gear, a power output gear shaft assembly comprises a transition gear, the transition gear comprises an external gear and a composite plastic gear, the external gear is connected with the composite plastic gear, and the external gear adopts a metal gear. According to the gas leakage-free control valve, the defects in the prior art are overcome, design is reasonable, the structure is compact, the problems that due to the fact that an existing control valve adopts a transition gear made of a plastic material, wear is too large, and the service life of the control valve is affected are solved, and the service life is prolonged by adopting the metal and plastic combined transition gear; and meanwhile, a gas inlet sealing assembly structure for controlling the compression allowance is adopted, zero leakage can be achieved under the long-time working condition, meanwhile, an intelligent control module with a DCU is adopted, a reasonable automatic control program is utilized, the control precision is improved, and the required service life is achieved.

Description

technical field [0001] The invention relates to the technical field of non-leakage gas control valve equipment, in particular to a gas non-leakage control valve used for fuel cells or engines. Background technique [0002] With the rapid development of new energy vehicles, fuel cells have also entered a rapid stage. During the working process of the fuel cell, after passing through the filter, compressor, cooler and humidifier, the air enters the fuel cell stack to react with the hydrogen on the proton membrane, and a gas control valve is required when the air exits the stack , to achieve the function of precisely controlling the air pressure in the stack, it is also necessary to reliably maintain the complete isolation of the inside and outside of the stack under the pressure of 400KPa and within the working cycle life of no less than 10 million times. [0003] For example, Chinese patent CN202010250201.2 discloses a fuel cell intelligent control mechanism, "including a DC...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a gas non-leakage control valve for fuel cells or engines, which overcomes the deficiencies of the prior art, is reasonable in design, compact in structure, and solves the transition of the control valve using plastic materials. The gears cause excessive wear and affect the service life of the control valve. The present invention reduces wear and improves service life by using transition gears made of metal and plastic. Realize 0 leakage under the working condition of time, at the same time adopt the self-contained DCU intelligent control module, use reasonable self-control program, improve the control accuracy and achieve the required service life

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