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    • 10. 发明专利
    • Controlling method of variable compression ratio for screw compressor
    • 螺杆压缩机可变压缩比的控制方法
    • JPS59213963A
    • 1984-12-03
    • JP8894983
    • 1983-05-19
    • Kobe Steel Ltd
    • SHIMODA TOSHIMASA
    • F04C28/26F04C18/16F04C28/12
    • F04C28/12
    • PURPOSE: To easily secure the best adiabatic efficiency, by comparing pressure between those ones before and after the discharge, while controlling the position of a slide valve so as to cause its pressure differential to meet the optimum value.
      CONSTITUTION: A through hole 18 is set up by situating the nearest position to the side of a suction port inside a closed space in time of a compression ratio being in a maximum state. And, when the compression ratio is made to be smaller from the maximum value, the pressure is designed so as to be measured just before the discharge extending over the pressure ratio in the widest range. In addition, also from the side of a discharge port 6, the gas pressure at the side of the discharge port 6 is led out through piping 20 as well. This piping leads to a differential pressure detecting part 21, and a hydraulic cylinder 9 is set in motion so as to cause a pressure differential to meet the optimum value whereby the position of the slide valve is controlled.
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:通过比较放电前后的压力,同时控制滑阀的位置,使其压力差达到最佳值,以便确保最佳的绝热效率。 构成:在压缩比处于最大状态的时间内,通过将封闭空间内的最靠近吸入口侧的位置置于通孔18。 并且,当压缩比从最大值变小时,将压力设计成在最宽范围内的压力比之前的排出之前进行测量。 另外,从排出口6的侧面,排出口6一侧的气体压力也通过配管20引出。 该管路通向差压检测部21,液压缸9被设定为运动,以使压力差达到最佳值,由此控制滑阀的位置。