| 摘要 |
PURPOSE:To prevent a wind or a water mill from being damaged by providing a pressure-compensating flow control valve in a discharge pipe passage of a pump driven by the wind or the water mill for controlling the discharge amount of the pump under a fixed value and controlling the number of revolutions of the wind or the water mill under a fixed value. CONSTITUTION:A pump 3 is driven by the revolution of a wind (or a water) mill 1 via a transmission gear box 2. A pressure-compensating flow control valve 42 is provided on a discharge pipe passage 5 of the pump 3 for controlling the discharge amount of the pump under a fixed value. Conseqnently, even if the number of revolutions of the windmill 1 is risen over a fixed value by a sudden gust or the like, the number of revolutions of the pump 3 is prevented from surpassing a fixed value. Meanwhile, the windmill 1 can be restrained at a fixed rotational speed, for example, within a permissible rotational speed, via the transmission gear box 2. |
