Fine casting method for super long lower pressure partition guide blade of turbine in stainless steel investment mold
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN XINRUN IND
- Publication Date
- 2009-09-02
- Estimated Expiration
- Not applicable Β· inactive patent
Smart Images
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Abstract
Description
Technical field:
[0001] The invention relates to a metal precision casting technology, in particular to the precision casting of super-long low-pressure diaphragm guide blades of steam turbines. technical background:
[0002] At present, my country's largest thermal power generation unit is a 600,000-kilowatt turbogenerator unit imported from Westinghouse Corporation of the United States. Among them, the material, mechanical properties, chemical composition, surface roughness, and geometric dimensions of the final guide vane of the low-pressure cylinder all have strict requirements. The tooling preparation for the investment casting process should be the design and manufacture of dies. attached Figure 1 It is the structural diagram of the final guide vane, and its shape, size, and profile are complex. It can be seen from the figure that the blade has a large degree of bending and torsion, the maximum wall thickness is Ο62 mm, the thinnest part of the steam outlet is only ...