Casting process and pouring system for gas turbine compressor bearing seat

Abstract

The invention discloses a process for casting a bearing base of a gas compressor of a combustion gas turbine and a pouring system thereof. A resin sand casting process is used; the pouring system comprises a straight pouring gate, a transverse distribution pouring gate, distribution pouring gates, a transverse pouring gate, a filter package and an inner flow gate, wherein a structure from the straight pouring gate to the transverse pouring gate is of a double-stage mean branching and distribution structure; the straight pouring gate is branched and distributed to the two distribution pouring gates through the transverse distribution pouring gate, and is uniformly branched to the transverse distribution pouring gate; the straight pouring gate, the transverse distribution pouring gate and the inner flow gate are obtained by shaping; and the transverse distribution pouring gate and the distribution pouring gates are formed by pre-embedding ceramic tubes. The pouring system and the casting process provided by the invention are reasonable and smart; the pouring system is provided with the double-stage branching and distribution structure, and metal liquid subjected to multistage buffer, decompression and turbulence suppression stably flows from the bottom of a casting through the inner flow gate, so as to effectively reduce secondary oxidation and slag inclusion and be beneficial to solidifying and feeding the casting. Therefore, the requirement on the qualities of the surface and the inside of the casting can be met; and the quality of the casting is greatly improved.

Description

technical field [0001] The invention relates to a pouring method and a pouring system thereof, in particular to a casting process of a gas turbine compressor bearing seat and a pouring system thereof. Background technique [0002] Shanghai Steam Turbine Works is one of the earliest manufacturers in China to design and produce gas turbines. At the beginning of the 21st century, Shanghai Electric ushered in another major opportunity for the development of gas turbines. When my country began to implement the "West-to-East Gas Transmission" project in 2000, Shanghai Electric clarified the goal of building a new highland for gas turbines, and proposed the goal of building a comprehensive gas turbine production base in Shanghai that can provide all-round services for users. In 2001, under the background of the country's "market for technology", Shanghai Electric established a partnership with Siemens and introduced a series of gas turbine technologies from Siemens. [0003] The ...

AI Technical Summary

Problems solved by technology

To complete such high-quality castings, the design of the gating system is particularly important. If the traditional gating system is used, the quality cannot be guaranteed

Because the traditional gating system, no matter whether it is closed, semi-closed or open, cannot guarantee the smooth flow of molten metal throughout the pouring process, and it is easy to entrain air and turbulent flow, resulting in scum, cracks and shrinkage defects.

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