Precise casing method of tiles of floating wall of combustion chamber of aeroengine

Abstract

The invention provides a precise casting method of tiles of a floating wall of a combustion chamber of an aeroengine. The precise casting method of the tiles of the floating wall of the combustion chamber of the aeroengine comprises the following steps of: designing and manufacturing a model, lining sands, dewaxing, sintering, installing a mold shell, charging materials, sealing a pressure regulating device tank body, vacuumizing, smelting, regulating the intensity of pressure in a tank body, pouring, discharging the pressure, and cooling. According to the invention, main casting technology parameters are simplified into control vacuum level, gases are prevented from entering liquid metal in an atom or molecule type, and the defects of air holes, oxidation mixing in castings are reduced; the speed is pressurized, the pressure and the time are dwelled, the mold filling process of metal liquids can be controlled effectively through regulating the pressure and the pressurization speed during the pouring process, the technology parameters are controlled well; the mold filling capability of metal liquids is improved; the turbulent flow and splashing during the mold filling process are reduced, and the mixture formation is reduced; the mold filling and condensation processes of metal liquids are controlled, each performance of castings is improved, and the processing cycle is shortened.

Description

technical field [0001] The invention relates to the field of precision casting methods, in particular to a precision casting method for floating wall tiles of an aero-engine combustion chamber. Background technique [0002] With the continuous improvement of the performance of aero-engines, in order to improve the heat transfer capacity inside the flame tube wall, improve the cooling efficiency and make the temperature of the flame tube wall evenly distributed, the floating wall structure flame tube has been gradually developed, which has become the mainstream commonly used by advanced aero engines in Europe and America. structure. The tile part of the floating wall radiator is a small ultra-thin high-temperature alloy casting with a complex structure. The casting has a special air passage cooling. There are 200 air holes with a diameter of 1.0mm on the area. The casting process is extremely complicated and the deformation control requirements are also very strict. Convent...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the object of the present invention is to provide a precision casting method for the floating wall tile of the combustion chamber of an aero-engine in order to solve the existing problems of the prior art such as cumbersome process, low product performance and long processing cycle. The main casting process parameters are simplified to control the vacuum degree, pressurization speed, pressure holding pressure, and pressure holding time, so as to better control the process parameters, control the filling and solidification process of the molten metal, improve the quality of the product, and shorten the processing cycle

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