Miniature propeller based on MEMS nozzle chip

Abstract

The invention discloses a miniature propeller based on an MEMS nozzle chip. The miniature propeller comprises a radiation thermal insulation casing, a catalytic reaction cavity and a top cover. The catalytic reaction cavity comprises a catalytic cavity arranged inside the radiation thermal insulation casing, and an inlet passage of the catalytic reaction cavity. One end of the inlet passage of the catalytic reaction cavity is communicated with the catalytic cavity; and the other end of the inlet passage of the catalytic reaction cavity passes through the radiation thermal insulation casing. A central covering piece hermetically covers the front end of the catalytic cavity; a top cover seal sleeve is inserted into the periphery of the central covering piece; and the MEMS nozzle chip passes through the middle part of the central covering piece. One end of the MEMS nozzle chip is communicated with the catalytic cavity; and the other end of the MEMS nozzle chip passes through the top cover. The miniature propeller also comprises a heater wire for heating the catalytic cavity. The miniature liquid fuel propeller has a small size, light mass, low power consumption, and higher specific impulse. The miniature propeller is very suitable for an attitude control system of a tiny satellite.

Description

technical field [0001] The invention relates to the technical field of micro propellers, in particular to a micro propeller using a silicon-based MEMS chip as a nozzle. Background technique [0002] In recent years, the application of microsatellites has attracted more and more attention and close attention from the aerospace community of various countries. Microsatellites have the advantages of small size, light weight, high technical content, short development cycle, and low development cost (tens of millions of RMB), and are a new hot spot in the development of space technology in recent years. Multiple micro-satellites can form formation flying satellites, which have a wide range of application values ​​in earth observation, stereoscopic imaging, precise positioning, atmospheric detection, astronomical observation and geophysical detection. Formation flying satellites have special requirements for the attitude control system: such as synthetic aperture radar, the optica...

AI Technical Summary

Problems solved by technology

However, this structure is too small for a single-component liquid fuel due to the limited size of the silicon chip, and the catalyst film produced by the micromachining sputtering method is easily poisoned and invalidated.

In addition, unlike liquid fuel thrusters of conventional size, the heat dissipation loss of tiny silicon chips is relatively serious, and it is often difficult to maintain a high temperature in the thrust chamber, so that the single-component liquid fuel can be fully decomposed to generate heat

The micro-channel structure produced by silicon chip etching makes the thruster easy to be blocked by impurities, which reduces the reliability of the thruster

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