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Constant Filling Fluid Coupling

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How To Repair The Hydraulic Coupling?

How To Repair The Hydraulic Coupling?

The hydraulic coupler is a variable speed transmission device which is transmitted by oil pressure, because the oil pressure is not limited by the grade, and it is a coupling with infinitely variable speed. In modern thermal power plants, the pressure of the boiler is getting higher and higher,...

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The hydraulic coupler is a variable speed transmission device which is transmitted by oil pressure, because the oil pressure is not limited by the grade, and it is a coupling with infinitely variable speed.


 


In modern thermal power plants, the pressure of the boiler is getting higher and higher, and the pressure on the pump is higher and higher.

As a result, the drive to drive the high speed to the pump is also very strong.

In order to operate the economy, the best way is to adapt to the changing conditions with variable speed regulation.

One way is to use direct transmission of small steam turbine to drive the feed water pump, but this method in unit must have standby steam source to ignition startup to adapt to the demand, institutional setting is more complex.

Another method is to use hydraulic coupling to change the pump speed to adapt to the starting condition of the unit.

On the one hand, it can greatly reduce the amount of electric power supply to the pump, so that the pump can start at a smaller speed than the lower speed.

On the other hand there will not be a constant speed electric pump in the unit is required for a starting throttling depressurization demand to adapt to the working conditions, improve the economic benefit of the unit, and to avoid the high pressure caused by the throttle valve in a short period of time the scrapped due to erosion, wear phenomenon, so, with hydraulic coupling is a kind of more ideal method.

At present, most power plants adopt the relatively economic configuration scheme - - normal runtime to variable speed feed water pump turbine driven feed water pump of water supply, and configured by the hydraulic coupling feed water pump, variable speed drive of start/standby unit used for starting.


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