Liquid piston compressor control system

Abstract

The invention discloses a liquid piston compressor control system. Electromagnetic valves are arranged on a gas inlet pipeline and a gas outlet pipeline which communicate with a gas compression cavity of a liquid piston compressor, an oil inlet of a first electromagnetic proportional speed regulating valve communicates with an oil outlet of a one-way variable hydraulic pump, an oil inlet of a two-position two-way electromagnetic reversing valve and an oil inlet of an overflow valve through pipelines, and an oil outlet of a second electromagnetic proportional speed regulating valve, an oil outlet of the two-position two-way electromagnetic reversing valve and an oil outlet of the overflow valve all communicate to an oil tank. An oil inlet of the one-way variable hydraulic pump is connected to oil through an oil pipe to form a pressure stabilizing and buffering structure, the acting modes of a liquid piston and a solid piston are changed, in the process that the pistons move from an upper dead center to a lower dead center, the follow-up performance between the liquid piston and the gas piston can be effectively controlled and guaranteed, the gas-liquid two-phase interface is stabilized, the clearance volume generated in the working process of the compressor is reduced, efficient and stable operation of the compressor is achieved, and the adaptability of the liquid piston compressor to the wide working conditions is improved.

Description

technical field [0001] The application belongs to the technical field of compressors, and in particular relates to a liquid piston compressor control system. Background technique [0002] The development of the world today is facing the dual challenges of huge and environmental problems. Hydrogen energy, as a zero-emission, pollution-free, sustainable green energy, is considered to be an important way to solve energy problems in the new century. Among the many application fields of hydrogen, hydrogen fuel cell vehicles are expected to become the primary breakthrough and an important outlet for the hydrogen energy industry, and become the best technical route for new energy vehicles, as well as an important development strategy for my country's future automobile industry. Mature, stable, safe, reliable and efficient high-pressure hydrogen refueling station equipment is the premise and foundation for the development of the hydrogen fuel cell vehicle industry. [0003] Taking ...

AI Technical Summary

Problems solved by technology

Due to the existence of liquid in the cylinder of the liquid piston compressor, without control, the high-speed movement will make it difficult for the liquid to keep up with the movement of the solid piston, and the follow-up between the liquid piston and the solid piston cannot be maintained

At this time, the gas-liquid two-phase interface will not be stable, and a part of the working medium gas is wrapped in liquid and difficult to discharge during the exhaust stage. As a result, with the operation of the compressor, the cylinder clearance continues to increase and the displacement decreases, which seriously affects the liquid piston. The working efficiency of the compressor

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