Optimization of Super-high Speed and Large Mass-flow Low Pressure Blades Used in Reaction Industrial Steam Turbine
HTC had introduced the technology of reaction industrial steam turbine from SIEMENS.Up to now,the introduced low-pressure blades could not satisfy the requirements of the market.To solve this issue,it optimizes the blade profiles and made the steam flowing better.Also,it utilizes the slope T-shape root and fir-tree root,improves the structure of straddled screw which is employed to fix the last installed slope T-shape blade,and changes the material of blades and rotor.In addition,by analyzing several safely operating low pressure blades manufactured by HTC,it infers the maximum allowable mass-flow of the blades.After optimization,the meridian plane of the blades has not been changed,the total-to-total isentropic efficiency improves at most 2.5%,the maximum continuous speed rises 20%,and the mass-flow capacity keeps as original.
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