A test system for friction and slip characteristics of o-ring under pressure

Abstract

The invention relates to a test system for friction and slip characteristics of an O rubber ring under pressure. The air supply component supplies stable gas pressures of different pressures to both sides of the O rubber ring at the same time, and passes the tension and pressure test. The first fixture and the first connecting pin of the instrument drive the tooling valve core to move relative to the tooling shell and the base of the tooling shell. By setting the first buffer container and the second buffer container, the pressure caused by the pressure on both sides of the O rubber ring will be reduced. The pressure change caused by the exchange and movement of the tooling spool uses the force sensor, displacement sensor and acquisition equipment to realize the measurement of the friction force of the O rubber ring under various working conditions. The invention can simultaneously and separately supply stable gas pressures of different pressures to both sides of the O rubber ring, truly simulate the pressure and pressure difference boundary conditions of the O rubber ring during the working process of the gas pressure reducing valve, and accurately measure the O rubber The friction force of the ring under different sliding boundary conditions provides data support for the performance design and precision improvement of the gas pressure relief valve.

Description

technical field [0001] The invention relates to a test system for friction force and slip characteristics under the state of O-apron pressure filling, in particular to a gas decompression valve for a booster delivery system of a carrier rocket under high-pressure O-apron pressure state and friction force and slippage Characteristic test system. Background technique [0002] The gas pressure reducing valve is an important stand-alone unit used in the pressurized delivery system of the launch vehicle. Its function is to decompress the high-pressure gas stored in the cylinder and stabilize the pressure within a certain range to pressurize the propellant tank. In the pressure reducing valves used in the existing pressurized delivery system, O rubber rings are used to ensure the isolation between the high pressure chamber of the pressure reducing valve and the feedback chamber. Due to the high working pressure of the gas pressure reducing valve used in the booster delivery system...

AI Technical Summary

Problems solved by technology

In the pressure reducing valves used in the existing pressurized delivery system, O rubber rings are used to ensure the isolation between the high pressure chamber of the pressure reducing valve and the feedback chamber. Due to the high working pressure of the gas pressure reducing valve used in the booster delivery system of the launch vehicle, resulting in high pressure O Under the action of the pressure on both sides of the high-pressure chamber and the feedback chamber, the pressure friction of the apron is far greater than that of the non-pressure state, which makes the pressure reducing valve deviate from the design working point, resulting in pressure deviation and out-of-tolerance at the outlet of the pressure reducing valve.

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