Running conditions of parallel-connected variable and constant speed pump are discussed using pump performance curve, and the correct switch steps are pointed out.
利用特性曲线对变速泵与定速泵并联运行工况进行了讨论，指出其正确切换步骤。
In this paper, disadvantages of using throttle to adjust and maintain water levels of deaerator and condenser in constant speed pump condensate system were presented.
在恒速泵凝结水系统中，依靠节流调节维持除氧器和凝汽器水位存在种种缺陷。
At the same time, constant engine speed stabilizes output displacement of hydraulic pump and then stabilizes travel speed and vibratory frequency in turn, so that compaction quality is increased.
同时，发动机转速的恒定也使液压泵输出排量稳定，进而保证了行走速度和振动频率的稳定，提高了压实质量。
At the same time, constant engine speed stabilizes output displacement of hydraulic pump and then stabilizes travel speed and vibratory frequency in turn, so that compaction quality is increased.
同时，发动机转速的恒定也使液压泵输出排量稳定，进而保证了行走速度和振动频率的稳定，提高了压实质量。
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