Flow resistance adjustment device of small thrust liquid attitude control engine unit

Abstract

The invention provides a flow resistance adjusting device of a low-thrust liquid attitude control engine set. The flow resistance adjusting device of the low-thrust liquid attitude control engine set comprises a thrust chamber shell channel, a Z-shaped annular throttling orifice and an electromagnetic valve. The thrust chamber shell channel is provided with a propellant inlet hole and a propellant outlet hole and also provided with a thrust chamber front-of-valve annular liquid collecting cavity used for mounting the Z-shaped annular throttling orifice. The front-of-valve annular liquid collecting cavity is located in front of an inlet of the electromagnetic valve. A behind-valve throttling orifice can be selectively mounted behind the electromagnetic valve. The flow resistance adjusting device of the low-thrust liquid attitude control engine set has the deep throttling capacity, and has the characteristics of being good in rectification effect, compact in structure, capable of inhibiting water attack and good in technology capability.

Description

technical field [0001] The invention relates to a flow resistance adjusting device of a small-thrust liquid attitude control engine unit. Background technique [0002] The main content of fluid flow resistance adjustment is to realize the adjustment of working parameters of fluid components, flow measurement, water hammer suppression, and compensation and matching of individual differences in flow characteristics of components through specific adjustment means. [0003] In recent years, Nanjing University of Technology has studied the throttling characteristics of special-shaped valve ports in multi-way reversing valves. Among them, U-shaped valve ports are prone to flow saturation when the opening is large, while V-shaped valve ports are less controllable to flow. powerful. Tongji University proposed a new type of cylindrical buffer structure with variable cross-section after comparing and studying a variety of special-shaped throttle cross-section shapes. The research sho...

AI Technical Summary

Problems solved by technology

[0004] With the development of spacecraft in the direction of miniaturization, high precision, modularization, and patternization, the traditional solution of hydraulic throttling orifice for small-thrust liquid attitude control engine units faces many challenges. For example, traditional throttling orifice, for Poor adaptability to small flow rate and insufficient throttling capacity. After the orifice plate is miniaturized, the processability of debugging operation is poor, and the throttling performance is unstable; the traditional throttling orifice plate cannot realize deep throttling, which seriously restricts the engine components in Generalization between different models; the traditional throttle orifice, affected by its disc-shaped shape, is generally installed behind the valve, and cannot weaken the water hammer in the high-pressure system. If it is installed in front of the valve, then Need special mechanical interface, complex structure

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