Double-ring sealing oil system for generator of thermal power plant and starting and stopping control method of double-ring sealing oil system

Abstract

The invention provides a double-ring sealing oil system and a starting and stopping control method thereof. The system comprises an air side sealing ring, an air side oil storage box, a first air side alternating-current sealing oil pump, a second air side alternating-current sealing oil pump, an air side oil supply mother tube electric door, an air side alternating-current sealing oil pump recycling pressure stabilizing valve, a direct-current sealing oil pump, a main oil hydrogen differential pressure regulating valve, a standby oil hydrogen differential pressure regulating valve, a first smoke exhaust fan, a second smoke exhaust fan, a first air side cooler, a second air side cooler, a first air side oil supply filter screen, a second air side oil supply filter screen, a main oil hydrogen differential pressure regulating valve bypass electric door, an air side direct-current sealing oil pump recycling pressure stabilizing valve, a hydrogen side sealing ring, a hydrogen side oil storage tank, an oil supply regulating valve, an oil drainage regulating valve, a first hydrogen side alternating-current sealing oil pump, a second hydrogen side alternating-current sealing oil pump, a hydrogen side alternating-current sealing oil pump recycling pressure stabilizing valve, a hydrogen side oil supply mother tube electric door, a first hydrogen side cooler, a second hydrogen side cooler, a first hydrogen side oil supply filter screen, a second hydrogen side oil supply filter screen and an air hydrogen side balance valve.

Description

technical field [0001] The invention relates to the sealing oil technology of a generator in a thermal power plant, in particular to a double flow ring sealing oil system of a generator in a thermal power plant and a start-stop control method thereof. Background technique [0002] The main function of the double-flow ring sealing oil system of the generator in a thermal power plant is to supply oil to the generator sealing shoe, and make the oil pressure higher than the hydrogen pressure in the generator by a certain value, so as to prevent the hydrogen in the generator from moving along the gap between the rotating shaft and the sealing shoe. Leakage to the outside, but also to prevent oil pressure is too high to cause a large amount of oil into the generator. In addition, the sealing oil supply also has the effect of lubricating and cooling the sealing pad. However, the existing dual-flow ring sealing oil system of thermal power plant generators cannot automatically start...

AI Technical Summary

Problems solved by technology

However, the existing double-flow ring sealing oil system of thermal power plant generators cannot realize the automatic start of the double-flow ring sealing oil system under the full stop state; Stop; and when the start-up program of the double-flow ring sealing oil system runs to a certain step, if the step condition is not met, the start-up program cannot continue

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