Monostable axial-flow type solenoid valve based on uncoupled permanent magnet bias

Abstract

The invention relates to a monostable axial-flow type solenoid valve based on uncoupled permanent magnet bias. The monostable axial-flow type solenoid valve comprises a permanent magnet assembly, a valve body assembly and an armature assembly, a coil, a valve seat and an outer magnetizer; the valve body assembly comprises an upper valve body, a magnetism isolating ring and a lower end cover; the armature assembly comprises an armature cover, an armature, a reed and a baffle plate; the coil forms an electromagnetic loop through the upper valve body, a main body part of the armature, the lower end cover, the magnetism isolating ring and the outer magnetizer; the permanent magnet and the armature cover form a permanent magnet loop through an air gap; the electromagnetic loop and the permanent magnet loop respectively form starting force on the armature assembly. A permanent magnet bias loop and a coil electromagnetic loop are independent from each other, so that influence of the permanent magnet on the coil electromagnetic loop is eliminated; the permanent magnet bias loop and the coil electromagnetic loop are linearly superposed, so that the monostable solenoid valve is simple in magnetic path design; and requirements on starting electromagnetic force are reduced by virtue of permanent magnet biasing force.

Description

technical field [0001] The invention relates to a monostable axial-flow solenoid valve based on non-coupling permanent magnet bias, which is especially suitable for satellite attitude and orbit control rocket engines. Background technique [0002] The monostable axial flow solenoid valve is widely used in satellite attitude and orbit control engines as a propellant control valve due to its high switching response repeatability and good coil cooling effect. For a monostable solenoid valve, its response time and power consumption are contradictory. However, the satellite platform has strict requirements on the response time and power consumption of the attitude and orbit control engine, which requires the solenoid valve to have the characteristics of low power consumption and fast response. [0003] At present, there are two measures to achieve fast response and low power consumption of the solenoid valve: (1) Design a dedicated drive circuit to realize high-voltage opening a...

AI Technical Summary

Problems solved by technology

Bistable solenoid valves are not suitable for attitude control engines, while monostable torque motor valves are suitable for attitude control engines, but their coils cannot be cooled by axial flow

In addition, the permanent magnet circuit and the electromagnetic circuit of these two solenoid valves are coupled together, which brings great difficulties to the magnetic circuit design process of the solenoid valve.

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