| 摘要 |
PURPOSE:To control the speed of a pump to a minimum side of consumption power on the basis of cooling water temperature, pump delivery amount, etc., by connecting various coolers to a delivery port of the seawater pump and driving the seawater pump and lubricating oil pump through a stepless variable speed motor. CONSTITUTION:A seawater pump 20 forcibly feeds seawater throgh seawater lines 30, 31 to an intake air cooler 28, lubricating oil cooler 32 and clear water cooler 29 connected to an engine 35, and is connected to and driven by an induction motor 21 whose speed is controlled by a microcomputer 25 through a frequency converter 22 and controller 23. Detected values of an intake temperature sensor 48, lubricating oil temperature sensor 40, clear water temperature sensor 51, seawater pump delivery flow meter 60, etc. are input to the microcomputer 25, and a speed of the pump 20 is controlled through the controller 23 so as to obtain optimum efficiency minimizing power consumption. |
