Axial-flow type electromagnetic pilot differential pressure drive large-flow control valve

Abstract

The invention provides an axial-flow type electromagnetic pilot differential pressure drive large-flow control valve in order to achieve the aim of rapid on-off control over a high-pressure and large-flow medium under the condition without an external control air source and achieve structure miniaturization and light at the same time so as to meet the performance index requirements of a fast-response high-performance attitude control engine. An axial integrated design structure of a first-stage small-drift-diameter electromagnetic auxiliary valve and a second-stage large-drift-diameter differential pressure main valve is adopted, the first-stage small-drift-diameter electromagnetic auxiliary valve is driven to be opened through electromagnetic attraction force, the second-stage large-drift-diameter main valve is driven to be opened through the medium differential pressure formed after the electromagnetic auxiliary valve is opened through a working medium, the medium differential pressure forming speed is high, acting force is large, the large-drift-diameter main valve can be rapidly driven to be opened, and the on-off control requirement of a high-pressure and large-flow medium ismet.

Description

technical field [0001] The invention relates to an axial-flow electromagnetic pilot pressure difference driven large-flow control valve, which can be used as a high-pressure large-flow medium on-off control valve for a liquid rocket engine, a satellite on-orbit execution power system, and a ground test system, and is used to control the start of the engine. and shutdown. The invention can realize the on-off control of the large flow rate and high-pressure propellant supply without an external control gas source, and realize the fast-response control of opening and closing while satisfying the requirement of small and light structure. Background technique [0002] In the development of a fast-response high-performance attitude control engine of a pre-research model, the system requires that the control valve should meet the large flow and high pressure requirements of a high-thrust engine above 3000N, and at the same time ensure fast response to opening and closing and a smal...

AI Technical Summary

Problems solved by technology

The engine is limited by the assembly structure and has no control gas supply, so the electric valve structure scheme cannot be adopted

With the solenoid valve scheme, in order to meet the demands of large flow and high pressure work, the solenoid valve must be designed with a large diameter, which requires a large electromagnetic suction force and an electromagnet structure to meet the action requirements, and the designed solenoid valve opens and closes slowly. The structural size and weight are too large to meet the performance index requirements of the fast-response high-performance attitude control engine

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