A self-balancing pressure regulating valve pressure regulating hydraulic system and its control method

Abstract

The invention provides a pressure regulating hydraulic system for a self-balancing pressure regulating valve and a control method thereof. The pressure regulating hydraulic system is characterized inthat a hydraulic station supplies a hydraulic oil source of a first set pressure value; an electro-hydraulic ratio decompression valve outputs hydraulic oil of a second set pressure value according toa first control signal on the basis of the set proportional relation; an electro-hydraulic servo valve outputs hydraulic oil to the self-balancing pressure regulating valve according to a second control signal on the basis of the opening magnitude, and controls the self-balancing pressure regulating valve to be turned on or turned off according to the opening direction; the self-balancing pressure regulating valve controls the first pressure value of the hydraulic oil entering the self-balancing pressure regulating valve and the second pressure value of gas output by the self-balancing pressure regulating valve to be consistent; an electromagnetic reversing valve controls the self-balancing pressure regulating valve to be turned off and compressed or decompressed and turned on according to a third control signal; a programmable logic controller outputs a first control signal to the electro-hydraulic ratio decompression valve, outputs a second control signal to the electro-hydraulic servo valve, and outputs a third control signal to the electromagnetic reversing valve; an oil tank stores an oil source. Gas pressure control is convenient and accurate.

Description

technical field [0001] The invention relates to the field of driving and control of a high-pressure air pressure regulating valve, in particular to a pressure regulating hydraulic system of a self-balancing pressure regulating valve and a control method thereof. Background technique [0002] Conventional hypersonic wind tunnel operation requires a certain amount of high-pressure gas. The high-pressure gas is generally stored in a high-pressure tank in advance. With the operation of the wind tunnel, the amount of high-pressure gas used increases cumulatively, and the gas pressure in the tank gradually decreases. When the pressure drops to a certain After the pressure value is exceeded, the test operating conditions are no longer met and the test must be terminated. In a test, the longer the operation time, the greater the gas consumption and the higher the operating cost. In the case of ensuring a certain effective running time, reducing the air consumption while making the ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a self-balancing pressure regulating valve pressure regulating hydraulic system and its control method, in order to solve the need to manually adjust the oil supply pressure of the hydraulic station with a tool such as a wrench in the prior art, which is inconvenient and Inaccurate, waste gas source and prolong the test preparation time, the economy and efficiency of the test operation are extremely low

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