Membrane type microcapillary precooler cooling refrigerant gas collecting device

Abstract

The invention relates to a membrane type microcapillary precooler cooling refrigerant gas collecting device. The structure is formed by assembling an integrated end cover, a supporting plate, sewing screws, sewing nuts and locking nuts. According to the structural size and number of the spiral microcapillary heat exchange membranes and inlet and outlet parameters of a cooling refrigerant, the structural size parameters of the membrane type microcapillary precooler cooling refrigerant gas collecting device and component parts thereof are determined, on the basis of completing the manufacturingof parts, firstly, assembly of the supporting plate and precooler heat exchange membrane gas collecting pipes is carried out, then the integrated end cover, the supporting plate and the precooler heatexchange membrane gas collecting pipes are assembled, and finally, sewing of the integrated end cover and the supporting plate is completed through the sewing screws and sewing nuts, thus realizing the precooler cooling refrigerant gas collecting device. The structure effectively reduces the connecting pipelines and interfaces of the precooler and peripheral components, is conducive to improvingthe structural reliability of the precooler, also facilitates assembly of the precooler cooling refrigerant gas collecting device, and has good manufacturability.

Description

technical field [0001] The invention belongs to the technical field of precooling power, and in particular relates to a cooling working medium gas collecting device of a diaphragm microtube precooler. Background technique [0002] Pre-cooling the engine is to pre-cool the incoming gas at the inlet of the air compressor with the help of the pre-cooler and its related components and systems, reduce the gas temperature at the inlet of the air compressor, increase the mass flow rate of the gas at the inlet of the compressor, and broaden the compressor. Efficient working range, so that the engine can adapt to the power demand of the aircraft under high-speed conditions, is one of the important development directions of aerospace vehicle power. [0003] As the core component of the precooling engine, the precooler plays a very important role in widening the operating speed range of the engine and improving the thrust-to-weight ratio of the engine. In order to meet the requirement...

AI Technical Summary

Problems solved by technology

Although the existing precooler structure can achieve high-efficiency heat exchange and has the characteristics of high compactness and high power density, but because the cooled air enters the precooler in the radial direction perpendicular to the axis and flows out in the axial direction, the flow of the precooler At the same time, due to the need for a relatively complicated molding process for the microtubes and welding and assembly of the diaphragm unit, the manufacture of the pre-cooler is difficult and costly; in addition, the pre-cooler passes through multiple heat exchange diaphragms The air collecting pipe on the unit is connected to the external cooling medium pipeline, which makes the peripheral connection pipeline of the precooler complex, with many sealing parts, large volume and weight, and is not conducive to the structural reliability of the precooler

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