Minisize propeller with electrolyzing water function

Abstract

The invention relates to a micro-electrolysis water thruster which can utilize water or water solution, belonging to the micro-mechanical technique. It comprises: (1) a micro-electrolysis water thruster formed by three layered plates as a top plate, a bottom plate and spray plate with a one-way valve; (2) and a micro-electrolysis water thruster formed by layering top plate and bottom plate with high depth-width rate electrode or plane electrode without one-way valve. Wherein, the electrolysis reaction chamber is between the top and bottom plates which comprises an electrolysis anode and a electrolysis cathode; the burning chamber has a fire electrode; the hydrophobic film is plated on the inner surfaces of electrolysis reaction chamber and the burning chamber; and the one-way valve is between the burning chamber and the micro-spray pipe. The invention can generate hydrogen-oxygen mixed gas via the electrolyte of water to be fired to generate high-temperature high-pressure steam to be sprayed outside the spray pipe to form pushing power, which can improve the specific thrust property, thermal efficiency, responding speed and control accuracy, while its structure is compatible with MEMS to apply the micromation and integration.

Description

technical field [0001] The invention belongs to the technical field of micro-machines, and in particular relates to a miniature electrolyzed water propeller utilizing the principle of electrolysis of pure water or aqueous solution. Background technique [0002] The micro-propulsion technology has emerged along with the concept of micro-spacecraft, especially the research and development of micro-satellites. The attitude control thrusters used in traditional spacecraft, such as cold air thrusters or hydrazine thrusters, have limited frequency response and relatively large impulse units, which are difficult to meet the requirements of micro-satellite attitude and position control. Therefore, micro thrusters with mN level or smaller thrust level and high control precision are one of the key technologies for miniaturization in the aerospace field, and have important research significance and application prospects. So far, the researches on micro-propellers that have been report...

AI Technical Summary

Problems solved by technology

The processing of devices of this scale mainly relies on the MEMS process at present, and the process means and material selection are greatly limited.

1) The size of the inner cavity and pipeline of the micro propeller is small, the Reynolds number is very low, and the convective heat transfer intensity between the heating resistor and the working medium (gas or liquid) is very low; while porous or multi-ribbed plates and other enhanced heat transfer The structure is not easy to be compatible with the existing micro-technology; 2) the existing MEMS technology mainly uses single crystal silicon or metal as the structural material, which are good conductors of heat (the thermal conductivity of single crystal silicon is more than 1.5 times better than that of steel), increasing The heat conduction between the resistor and the substrate is improved; although SiO can be prepared 2 It is used for heat insulation, but it can only be used to make thin films, and the heat insulation effect is limited; 3) Regarding the preparation of resistors, the suspension structure is not easy to make. Generally, MEMS resistors use sputtered metal layer resistors or CVD polysilicon thin film resistors. The obtained planar resistors are the same as The substrate contact area is large, and the area in contact with the fluid is limited, so the heat conduction loss is large; the suspension structure can be obtained by using the sacrificial layer process, but the suspension height is small, the effect is limited, and the structural reliability is reduced; Harvard and The bulk silicon resistance heater developed by Brown University expands the contact area between the fluid and the heater, but the connection area between the resistance and the substrate is still large, and in this heater, the contact part between the resistance and the substrate is a conductive channel, and it is impossible to prepare a barrier. hot film

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