Large-caliber high-pressure pressure regulating valve for pneumatic test device

Abstract

The invention relates to a large-caliber high-pressure pressure regulating valve for a pneumatic test device, and belongs to the technical field of valves. The large-caliber high-pressure pressure regulating valve for the pneumatic test device comprises a gas inlet (1), a gas outlet (2), a valve body (3), a valve plug (4), a valve seat (5), an upper cover (6), a lower cover (7), a balance air cylinder (8), a balance gas pipe (9), an oil cylinder supporting frame (10) and a driving oil cylinder (11), wherein the size of a gas flow channel between the valve plug (4) and the valve seat (5) is changed through vertical movement of the valve plug (4), and pressure regulation and pressure stabilization are achieved. According to the large-caliber high-pressure pressure regulating valve for the pneumatic test device, due to the facts that the balance air cylinder (8) is arranged in the valve body (3), and is connected with the gas inlet (1) through the balance gas pipe (9), and high-pressure gas before the valve serves as gas for balancing the large-caliber high-pressure pressure regulating valve for the pneumatic test device, driving force of the large-caliber high-pressure pressure regulating valve can be greatly reduced, regulation precision is improved, rapid pressure stabilization and rapid pressure adjustment are achieved, the range of pressure regulation is wide, and the full-opening time and the full-closing time are short.

Description

technical field [0001] The invention relates to a high-pressure pressure regulating valve, in particular to a large-diameter high-pressure pressure regulating valve used for aerodynamic test equipment such as a hypersonic wind tunnel or an engine test bench. Background technique [0002] Hypersonic wind tunnel and engine test bench play a very important role in the development of aircraft. Due to the high operating energy ratio of the wind tunnel or test bench, the temporary flushing type is generally used, that is, the medium is stored in advance. pressure ratio. During the hypersonic wind tunnel or engine test bench test, the flow field is required to be controlled within a certain accuracy range. Generally, the volume of the air source that provides the operating medium for the wind tunnel or test bench is limited. During the test, the pressure of the air source will continue to drop, which will directly affect the operating status of the wind tunnel or test bench. Ther...

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Problems solved by technology

For general industrial high-pressure regulating valves, when the valve diameter is larger than 80mm, the sleeve type or window type is used to solve the problem of large driving force, but the pressure regulation accuracy of the sleeve type or window type regulating valve is not high, and the adjustment range is relatively large Small, difficult to meet the requirements of wind tunnel or test bench

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