A liquid-gas conversion type gas pulsation pressure amplifying device

Abstract

The invention belongs to the technology of dynamic pressure generation, and relates to a liquid-gas converting type gas pulsating pressure amplifying device. The liquid-gas converting type gas pulsating pressure amplifying device comprises a hydraulic control unit, a pulsating generation unit and a liquid-gas converting unit. The pulsating generation unit comprises a hydraulic cylinder, end covers, a piston and a connecting rod. The piston and the connecting rod divide the hydraulic cylinder into a liquid cavity A and a liquid cavity B, and the liquid cavity A and the liquid cavity B are eachprovided with an oil inlet and an oil outlet. The hydraulic control unit is connected with the oil inlets. The liquid-gas converting unit comprises two liquid-gas converting cylinders and rodless pistons in the liquid-gas converting cylinders. The two liquid-gas converting cylinders are connected with the oil outlet of the liquid cavity A and the oil outlet of the liquid cavity B, and the lower ends of the rodless pistons are provided with a gas cavity A and a gas cavity B. According to the liquid-gas converting type gas pulsating pressure amplifying device, the liquid volume is invariable, and the displacement of the rodless pistons and the gas pulsating pressure amplitude are increased in a reducing manner; and by controlling the initial positions of the piston of the hydraulic cylinderand the rodless pistons, the inner volumes and the initial pressures of the gas cavity A and the gas cavity B are the same, the problem caused by gas static pressure polarization is effectively solved, and the pulsating pressure frequency range is enlarged.

Description

technical field [0001] The invention belongs to the dynamic pressure generating technology, in particular to a liquid-gas conversion type gas pulse pressure amplifying device. Background technique [0002] Pressure is an important parameter both in the field of military technology and in production and life, and can be divided into static pressure and dynamic pressure. Dynamic pressure exists widely in various fields, and accurate measurement of dynamic pressure is of positive significance for improving the level of technology and improving product quality. [0003] Before using a pressure sensor to measure dynamic pressure, the sensor needs to be calibrated. Sensor calibration methods can be divided into relative and absolute methods. The relative method is to correct the output of the sensor being calibrated to be the same as that of the standard sensor under the same test environment. The accuracy of the sensor to be calibrated will not exceed that of the standard sens...

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Problems solved by technology

[0006] The invention provides a liquid-gas conversion type gas pulsation pressure amplification device, which mainly solves the problem that the amplitude of the high-frequency gas pulsation pressure signal generated by the mechanical device in the prior art is too small, the amplitude cannot be adjusted, and the bias environment is rarely considered. The problem of generating gas pressure signal under

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