Owing to start-up and dwell continually under high speed working condition, the inertial force is the main load that leads to the chain vibration and affects the position accuracy and step rate.

由于链在高速工况下处于频繁的启动和停歇状态，惯性力是其主要的工作负荷，进而引发链节的振动，影响链系统的定位精度和步进速率。

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The situation of working condition: the pressure drop up to 160-350 kg, and power plant systems are under the greatest pressure valves, flow rate is generally 30% of normal flow.

工况情况：压降达160 - 350公斤，是电站系统中承受压差最大的阀门，流量一般为正常流量的30%。

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By means of numerical simulation, the research on inner-flow of mining contra-rotating axial flow fan working under low flow rate condition was made.

通过数值模拟手段，对一矿用对旋式轴流式通风机小流量工况内部流动进行了深入研究。

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