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(1)关闭出口闸阀起动。离心泵的轴功率是随着流量的增大而增大的,当流量为0时,轴功率最小。所以离心泵通常关闭出口闸阀起动,以减少电动机的起动负荷。起动后当机组达到额定转速时,应尽快把闸阀打开,一般最多不超过3～5 min。 (2)水泵在正常运行时,机组应平稳,声音应正常、连续而不间断。不正常响声和振动往往是水泵故障发生的前兆,遇此情况,应立即停机检查。 (3)注意轴承温度和油量的检查。一般滑动轴承的温度应不超过85℃,滚动轴承不超过90℃。如果没有测温装置,可用手触摸轴承外壳,如果感到手烫得不能停留时,说明温度过高,必须停机检查。
(1) Close the gate valve start. Centrifugal pump shaft power is increased with the increase of flow, when the flow is 0, the shaft power minimum. Therefore, the centrifugal pump is usually closed to start the export gate valve to reduce the starting load of the motor. After starting when the unit reaches the rated speed, the valve should be opened as soon as possible, generally not more than 3 ~ 5 min. (2) When the pump is in normal operation, the unit should be steady and the sound should be normal and continuous without interruption. Unusual noise and vibration are often the precursors of pump failure, in this case, should be shut down immediately check. (3) pay attention to bearing temperature and fuel inspection. General sliding bearing temperature should not exceed 85 ℃, rolling bearings do not exceed 90 ℃. If there is no temperature measuring device, the bearing shell can be touched by hand. If the hand is too hot to stay, it indicates that the temperature is too high and the machine must be shut down for inspection.