A kind of diaphragm type micro tube precooler cooling working medium gas collecting device

Abstract

The invention relates to a diaphragm type microtube precooler cooling working fluid gas collection device. The structure is assembled from integrated end caps, backing plates, suture screws, suture nuts and locknuts. According to the structural size and quantity of the spiral microtube heat exchange diaphragm and the inlet and outlet parameters of the cooling medium, the structural size parameters of the cooling medium gas collection device and its component parts of the diaphragm microtube precooler are determined. On the basis of component manufacturing, firstly carry out the assembly of the support plate and the precooler heat exchange diaphragm air collection pipe, then carry out the assembly of the integrated end cover, the support plate, and the precooler heat exchange diaphragm air collection pipe, and finally use the suture screws and The sewing nut completes the sewing of the integrated end cover and the support plate, and realizes the gas collection device for the cooling working medium of the precooler. This structure effectively reduces the connection pipelines and interfaces between the precooler and peripheral components, which is beneficial to improving the structural reliability of the precooler, and is conducive to the assembly of the precooler cooling working medium gas collection 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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