Generator single-ring sealing oil system for thermal power plant and on-off control method of generator single-ring sealing oil system

Abstract

The invention provides a generator single-ring sealing oil system for a thermal power plant and an on-off control method of the generator single-ring sealing oil system. The generator single-ring sealing oil system comprises a generator sealing ring, an oil return expansion slot, an intermediate oil tank, an intermediate oil tank level control valve, an air extraction slot, a vacuum oil tank, a sealing oil vacuum pump, a first main sealing oil pump, a second main sealing oil pump, an AC sealing oil pump recycling voltage stabilizing valve, a vacuum oil tank level control valve, a sealing oil recycling pump, a first oil supply filter screen, a second oil supply filter screen, an oil supply adjusting valve, an oil supply adjusting valve bypass electrically-operated gate, a first smoke exhaust fan, a second smoke exhaust fan, a separator, a sealing oil vacuum cooler and a plurality of pipelines. The generator single-ring sealing oil system for the thermal power plant can be automatically started up in the full-stop state and automatically stopped in the running state.

Description

technical field [0001] The invention relates to the sealing oil technology of a generator in a thermal power plant, in particular to a single 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 single-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 being separated along the shaft and the sealing shoe. The gap leaks outwards, and at the same time prevents a large amount of oil from entering the generator due to excessive oil pressure. The existing single-flow ring sealing oil system of the thermal power plant generator cannot realize the automatic start of the single-flow ring sealing oil system under the state of full stop; nor can it realize the s...

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Problems solved by technology

The existing single-flow ring sealing oil system of the thermal power plant generator cannot realize the automatic start of the single-flow ring sealing oil system under the state of full stop; nor can it realize the single-flow ring sealing oil Automatic stop of the system; and when the start-up program of the single-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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