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1.前言风机、泵之类的涡轮机械,当对流体流量进行节流时,如将转数下降,则轴动力以与转速比成三次方的比例下降。因此,自1973年发生石油危机以来,人们采取了多种利用转数控制装置实现节能的对策。转数控制方式大体上可以分为电气式(二次阻力式、滑旋电流式与可控硅式等等)与机械式(流体接头式与液压离合器式等等)两大类。其中,液压离合器式的无级变速装置,因为输出转数可任意控制,可直接连接进行运转,所
1. Introduction Turbine machinery such as fans and pumps, when the fluid flow throttling, such as the number of revolutions decreased, the shaft power and the speed ratio into the third power ratio decreased. Therefore, since the oil crisis in 1973, a number of measures have been taken to save energy by using a revolution speed control device. The number of revolutions can generally be divided into electrical (secondary resistance, sliding current and SCR, etc.) and mechanical (fluid coupling and hydraulic clutch, etc.) two categories. Among them, the hydraulic clutch-type continuously variable transmission, because the output can be controlled arbitrary number of revolutions can be directly connected to the operation,