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11. 发明专利

JPS6433404A BOILER FEEDWATER PUMP TURBINE CONTROLLER 失效
公开(公告)号：JPS6433404A
公开(公告)日：1989-02-03
申请号：JP18891087
申请日：1987-07-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAGAO MASASHI , MISAWA KAZUYUKI
IPC分类号： F22D5/32 , F01D17/00
摘要： PURPOSE: To facilitate the adjustment of the control of feed water by providing a means to calculate the number of revolutions of a boiler feed pump turbine which enables the correction of a pressure to keep a flow rate constant against changes in the outlet pressure of a boiler feed pump. CONSTITUTION: A signal to a controller for a boiler feed pump turbine from a boiler controller is used as feed water signal (flow rate command signal) and hence, the controller of the boiler feed water pump turbine is provided with a feed water signal-number of revolutions signal converter. A feedback loop to a proportional-plus-integral controller of the boiler controller is provided with a number of revolution signal-feed water signal converter. The feed water signal-number of revolutions signal converter inputs an inlet pressure of a boiler feed water pump in the computation of a conversion process to consider a change in the feed water pressure and the necessary number of revolutions is calculated based on a pump Q-H characteristic. Thus, when the pressure of a boiler changes, the correction of the pressure is accomplished in the controller for the boiler feed water pump turbine hereby keeping the flow rate constant.

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