Test and analysis of welding residual stress of interflow type hydraulic turbine runner

Huadian Technology ›› 2009, Vol. 31 ›› Issue (2): 7-10.

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Test and analysis of welding residual stress of interflow type hydraulic turbine runner

LEI Qinghua

State Power Zhengzhou Machinery Design Research Institute，Zhengzhou 450052, China

Received:1900-01-01 Revised:1900-01-01 Online:2009-02-25 Published:2009-02-25

Abstract

Abstract: Based on the residual stress tests of interflow type hydraulic turbine runner of some hydroelectric power stations in southwest China, this article introduced the indentation strain gage method and its characteristics of the newest application in hydraulic turbine runner residual stress tests, and according to the test data, the runner residual stress distributed condition was analyzed. Combine with the information of other hydroelectric power stations, the reasons of crack appeared have been discussed in the runner production process and operation, the relation between crack and welding residual stress has obtained. The way to solve the question has been put forward finally.

Key words: hydraulic turbine, runner, residual stress, crack, analysis

LEI Qinghua. Test and analysis of welding residual stress of interflow type hydraulic turbine runner[J]. Huadian Technology, 2009, 31(2): 7-10.

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Test and analysis of welding residual stress of interflow type hydraulic turbine runner

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