A magnetic circuit symmetric bipolar frictionless self-locking valve

Abstract

The invention discloses a magnetic circuit symmetrical bipolar friction-free self-locking valve. The magnetic circuit symmetrical bipolar friction-free self-locking valve comprises an inlet fitting, abuilt-in filter, a valve body assembly, a first supporting spring, a second supporting spring, an armature iron assembly and a valve seat, wherein the armature iron assembly, the built-in filter andthe first supporting spring are all arranged in the valve body assembly; the built-in filter is in pressing connection with the armature iron assembly through the first supporting spring; one end of the armature iron assembly is connected with the built-in filter, the inlet fitting is connected with the valve body assembly; the part of the built-in filter is located in the inlet fitting; the valveseat and the second supporting spring are both arranged in the valve body assembly; and the valve seat is in pressing connection with the armature iron assembly through the second supporting spring.According to the magnetic circuit symmetrical bipolar friction-free self-locking valve, the anti-pollution capacity is improved, besides, switching on and off and sealing reliability are greatly improved, and the capacity of prolonging the service life of pulse is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of spacecraft space fluid management, in particular to a magnetic circuit symmetrical bipolar frictionless self-locking valve. Background technique [0002] The chemical propulsion system of the new generation of communication satellite platforms has improved the working pressure and on-orbit life, and the electric propulsion system has put forward stricter technical requirements for high-pressure self-locking valve products in terms of pulse life, cleanliness, reliability, volume, weight, etc. , Generally, the pulse life is required to be more than 100,000 times, the product needs to be designed as redundant as possible, and the smaller the volume and weight, the better. [0003] On the one hand, the high-pressure self-locking valve products currently used in communication satellites adopt the form of mechanical position retention, which has a complex structure and relatively large volume and weight. High ...

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Problems solved by technology

[0003] On the one hand, the high-pressure self-locking valve products used by communication satellites adopt a mechanical position-holding form, which has a complex structure and relatively large volume and weight. At the same time, due to the special structure of the position-holding mechanism, the pressure-bearing capacity of the valve is weak and cannot adapt to more High working pressure requirements and life requirements; secondly, during the switching process of the product, there is sliding friction between the armature assembly and the inner wall of the valve, which often produces redundant products, resulting in product leakage or stuck moving parts, resulting in complete failure of the product; , the product cannot resist the extraneous substances that may be introduced in production, testing, final assembly, etc.; finally, the opening and closing functions of the product are single-point failure modes, and the product reliability is not good. Combining the above factors, the current product The state of technology cannot well meet the mission requirements of the new generation of communication satellites

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