Micro-flow control device of multilayer hole plate structure
A control device and plate structure technology, applied in the direction of flow control, non-electric variable control, control/regulation system, etc., can solve the problems of sensitivity to excess objects, inability to apply to spacecraft electric propulsion systems, and inability to achieve mechanical processing.
Active Publication Date: 2014-11-12
BEIJING INST OF CONTROL ENG
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[0003] At present, the conventional flow control method is mainly small hole throttling. For the mg / s level flow control level of the electric propulsion system, its equivalent pore diameter is at the nm level. On the one hand, it cannot be realized by mechanical processing; on the other hand, it contains such Products with small-scale holes are very sensitive to excess, and there are currently no effective excess control and protection measures, so conventional small-hole throttling technology cannot be applied to current spacecraft electric propulsion systems
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[0019] Below in conjunction with accompanying drawing, the present invention is described in detail, as figure 1 As shown, a multi-layer orifice plate structure micro-flow control device of the present invention includes a joint assembly 1, an orifice plate 2 and an end cover plate 3; as figure 2 As shown, the orifice plate 2 adopts a stainless steel plate in the shape of a disc, and a number of small holes are processed on the surface of the disc by laser drilling. The diameter of the small holes is 50 μm to 100 μm, and the deviation is ±0.2 μm; The channel is formed by eclipse, such as image 3 As shown, the end cover plate 3 is also processed into a disc shape with the same outer diameter as the orifice plate 2 by a stainless steel plate, and a small hole is punched in the center, and the two end cover plates 3 are welded on both sides of the disc of the orifice plate 2 by diffusion welding. , the central hole of the end cover plate 3 communicates with the small hole loca...
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Abstract
The invention relates to a micro-flow control device of a multilayer hole plate structure. The micro-flow control device comprises connector assemblies (1), hole plates (2) and end cover plates (3). Each hole plate (2) is in a disc shape, a plurality of small holes are machined in the surface of the disc, channels are formed between the small holes through etching, the end cover plates (3) are in disc shapes, small holes are formed in the centers of the discs, the two end cover plates (3) are welded to the two sides of the discs of the hole plates (2), the center holes of the end cover plates (3) are communicated with the small holes in the centers of the hole plates (2), the small holes in the hole plates (2) are connected in series through the etched channels from the small hole in the center, and the small holes are finally led to the small hole in the center; the two connector assemblies (1) are connected with the two end cover plates (3) respectively.
Description
technical field [0001] The invention belongs to the technical field of spacecraft space propulsion, and in particular relates to a micro-flow control device with a multi-layer orifice plate structure, which is suitable for precise adjustment and control of xenon gas micro-flow in a spacecraft electric propulsion storage and supply subsystem. Background technique [0002] The DFH-3B satellite platform adopts the electric propulsion subsystem to perform space tasks such as north-south position assurance and momentum wheel unloading. Compared with the conventional chemical propulsion system, the electric propulsion system proposes high-precision control requirements for propellant micro-flow, and its flow rate is generally mg / s level, the control accuracy is ±3%. [0003] At present, the conventional flow control method is mainly small hole throttling. For the mg / s level flow control level of the electric propulsion system, its equivalent pore diameter is at the nm level. On t...
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Inventor 张兵苟浩亮王振鲁刘晖李栋沈岩曹健曾昭奇惠欢欢
Owner BEIJING INST OF CONTROL ENG