A high pressure and large ratio flow regulating valve

Abstract

The invention relates to a high-pressure large-transformation-ratio flow regulating valve which is composed of a linear stepping motor, a regulating rod, a machine frame, a throttling pore plate, a saddle-shaped gasket, a lock nut, a shell, a pressing plate and the like. A driving mechanism comprises the linear stepping motor. A regulation part is composed of the regulating rod and the throttling pore plate. The linear stepping motor is connected with the shell through the machine frame. A shaft of the linear stepping motor and the regulating rod are connected together and locked tightly through the saddle-shaped gasket and the lock nut. The throttling pore plate is installed inside the shell in a pressed mode through the pressing plate. The throttling pore plates with different pore diameters can be replaced according to different flow regulation ranges. In order to guarantee the sealing performance under high pressure, motive seal positions of external leakage are sealed through two O-shaped rubber rings. In the flow regulation process, a control signal is input to the linear stepping motor, the linear stepping motor drives a regulation element to move upwards and downwards, the flow area of the throttling pore plate is changed, and accordingly flow regulation is achieved.

Description

technical field [0001] The invention relates to a flow regulating valve with high pressure and large variable ratio, which can be adapted to various liquid rocket engines that need to regulate the flow. Background technique [0002] The variable thrust rocket engine has the advantage of adjustable thrust, which is the best choice for some spacecraft systems. For example, the main engine SSME of the space shuttle in the United States can change its thrust within the range of 50% to 109% of the rated thrust, and the main engine of my country's CE-3 Lunar also has a thrust ratio of 5:1. In variable-thrust liquid rocket engines, it is often necessary to use a flow regulating valve to change the flow of propellant during the working process of the liquid rocket engine. [0003] Existing single-element flow regulating valves do not have the function of changing the throttle orifice to adjust the flow range. Most of the flow regulating valves have a disproportionate displacement o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of existing single-element flow regulating valves that cannot replace the throttling orifice plate, the flow conditions are inaccurate, and the control is relatively complicated, the present invention proposes a simple control, high adjustment accuracy, large flow ratio, and adaptable to different working conditions. conditional flow control valve

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