Design Principle Analysis And Improvement Design Principle Of Turbine Emergency Stop Device

This paper starts with resolving reliability of steam sets, then illuminates the problem and design principle of oil test device of overspeed protection system, which is made by Shanghai Turbine Company Ltd..As we know, overspeed protection system is one of main protection of steam turbine sets. Base on the standing order, we must do oil filler test regularly, but the oil filler test of the emergency stop system, which made by Shanghai Turbine Company Ltd., is often fails in stroke. So we can't do oil filler test when the units in operating to test the reliability of overspeed protection system.Firstly, this thesis presented the theory of overspeed protection system. And pointed out the reason why the emergency stop system is often fails in stroke. And then use the theory of hydrodynamics and fluidics jet to solve the problem. The conclusions can be used to analyze the status of emergency stop system, which often acts early.This new technology can directly conduct the same style device reform. The effect of oil filler test that is improved is correspondence to the overspeed test, so it is no use to do overspeed test repeatedly. It can reduces the deterioration of the rotor's longevity, and that, it can reduce the starting time of the units, which can reduce the cost of fuel consumption and steam deterioration. Especially to large capacity steam units that use the same style device, it will get large economic effectiveness. Li Chun (thermal power engineering) DIRECTED BY Prof. Fu Zhongguang...