Method for reducing flow resistance of interlayer cooling structure of 3D printing thrust chamber

Abstract

The invention discloses a method for reducing the flow resistance of an interlayer cooling structure of a 3D printing thrust chamber. The method comprises the following steps: firstly, the interlayercooling structure of the thrust chamber is optimally designed, and then a workpiece is formed by adopting a 3D printing technology; the formed interlayer cooling structure of the thrust chamber is treated by adopting an electrochemical polishing and plasma electrolytic polishing technology; and through cooperation of the two technologies, the needed workpiece can further reach the needed performance, rough polishing is conducted through the electrochemical polishing technology, and fine polishing is conducted through the plasma electrolytic polishing technology. According to the plasma electrolytic polishing technology, the surface quality of parts can be improved by adjusting the proportion of electrolyte and the magnitude of current and voltage, initiation and expansion of a crack sourceare effectively reduced, the flow resistance of the interlayer cooling structure of the thrust chamber is effectively reduced, the service condition of the interlayer cooling structure of the thrustchamber under specific conditions is achieved, the problem of workpieces at present is solved, and the application range of the 3D printing technology and a surface modification technology in the aerospace field is widened.

Description

technical field [0001] The invention belongs to the field of 3D printing technology, and in particular relates to a method for reducing the flow resistance of an interlayer cooling structure of a 3D printing thrust chamber. Background technique [0002] The thrust chamber is an important component that converts the chemical energy of the liquid propellant into propulsion, and plays an extremely important role in the engine. It will be eroded by corrosive high-temperature and high-pressure gas during operation. In order to effectively export heat and perform normally, the design of the thrust chamber and the selection of materials are particularly important. The traditional thrust chamber interlayer cooling structure has complicated manufacturing process, long manufacturing cycle and different quality levels. The use of 3D printing technology to form the interlayer cooling structure of the thrust chamber can meet the requirements of complex design, low cost and fast delivery...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for reducing the flow resistance of the interlayer cooling structure of the 3D printing thrust chamber, so as to solve the problem of the flow resistance of the interlayer channel during the liquid flow test

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