Micro-flow throttling device

Abstract

The invention provides a micro-flow throttling device which comprises a sleeve shell, the sleeve shell is used for assembling and installing a throttling structure in the sleeve shell to form resistance to control fluid flow, the throttling structure comprises a first axial hole, the first axial hole is formed in a thin threaded rod, a first radial hole is formed in one side of the first axial hole, and a second radial hole is formed in the other side of the first axial hole. A first radial hole is formed in the sleeve shell, a fine thread flow channel is formed in one side of the first radial hole, a second cavity adjusting structure is arranged between the fine thread flow channel and the coarse thread flow channel and installed on the sleeve shell to adjust the fluid flow, and a butt joint structure is installed on the inner wall of the sleeve shell to conduct disassembly and assembly limiting on the throttling structure. According to the micro-thrust single-component engine, through mutual matching of the four parts, micro runners (lower than 0.3 g / s) can pass through the parts where gaps are formed among the parts, and the throttling problem in the field of micro-thrust single-component engines is solved through resistance of flowing of propellants.

Description

technical field [0001] The invention relates to the throttling field, in particular to a tiny flow throttling device. Background technique [0002] Single-component liquid rocket engines are mostly micro and small liquid rocket engines, which are a branch of liquid rocket engines. They are used to provide momentum and perform attitude control for missiles, launch vehicles, satellites, spacecraft, detectors and other aircraft. The injector is A very important component in a mono-element engine, it affects the working life, starting performance, efficiency and working stability of the thrust chamber. [0003] The pressure drop of the injector is a key parameter of the injector, which affects the performance of the engine from different angles. If the pressure drop of the injector is too small, it will lead to unstable operation of the engine, increase the roughness of the chamber pressure, and generate low-frequency oscillations. Therefore, to ensure For the stability of engi...

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Problems solved by technology

[0004] Patent document CN1118180A discloses a throttling device for an internal combustion engine and a method for manufacturing the throttling device. This invention enables throttling by using a metal butterfly throttle valve, but the throttling of the valve cannot achieve the above-mentioned flow accuracy. It is even more impossible to achieve flow regulation in this tiny flow

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