Analysis And Research In The Fault Of Meduim And Small Turbine's Hydraulic Governing System

This paper gives an introduction to the function, basic principle and makeup of steam turbine regulating system, an introduction to induction device, transmission amplifying device, implement device and feedback device of medium and small-sized steam turbine's hydraulic regulating system, a representation of formation of static characteristic curve of regulating system and two important index- speed fluctuation rate and the dilatoriness rate, an introduction to the concept, measure index and influencing factor of dynamic characteristic, a brief introduction to oil-feed system, an introduction to function structure and work principle of synchronous machine, an introduction to function structure and work principle of automatic throttle urgent breaker, break throttling, axial position breaker, magnetic break throttling in protection device. On this foundation, this paper investigated the operation conditions and existing problems of medium and small-sized steam turbine's hydraulic regulating system, and we found the main accidents of steam turbine: hydraulic regulating system works unsteady under debugging and normal running period; the adjustment method of axial movement was not scientific; urgent breaker work unsteady and so on. We analyzed the basic principle and makeup, structure and working principle, installment and design of regulating system, made use of the cause and effect diagram to find out various end factor of breakdown phenomenon, then advanced rearrange measurements aiming at various end factor. Later we consummated the measurements in practice gradually, and solved the problems nicely. These were verified in industrial practice and obtained good economic and social benefits.