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多级泵减少容积损失来提升运转效率的办法步骤

标签:
多级泵
发布时间:2021.02.09
阅读量:30

自均衡多级泵减少容积损失来提升运转效率的办法步骤:

(1)减少多级泵内的漏泄损失,进步零件的加工精度和装配质量,减少均衡盘前节流套的径向间隙和叶轮前后密封环及导叶密封环的径向间隙,减少泵内液体从高压侧漏泄到低压侧形成的压能损耗。对叶轮密封环、导叶套、均衡盘前节流等部件应选用硬度较高的资料,并停止进步耐磨性的热处置。

(2)冷态起动给水泵时,按规程请求应充沛暖泵,若暖泵不充沛,泵体上下容易产生较大的热温差,使转子产生弓形变形,此时启动多级离心泵易使内部密封间隙磨大,形成内部漏泄和回流容积损失增大。

(3)运转中认真监视泵的轴向窜动及均衡盘后泄水压力的变化,正常运转时,均衡盘后泄水压力较泵的入口压力大范围的变化大时应及时检修,减少漏泄损失,进步多级泵的容积效率。

(4)调整负荷时要平稳,防止给水压力的大幅动摇,坚持给水泵的连续稳定运转,减少泵的轴向窜动,以免形成密封间隙磨损。


Methods and steps of self balancing multi-stage pump to reduce volume loss to improve operation efficiency:

(1) It can reduce the leakage loss in multistage pump, improve the machining accuracy and assembly quality of parts, reduce the radial clearance of throttling sleeve in front of equalizing disc, the radial clearance of sealing ring before and after impeller and guide vane seal ring, and reduce the pressure energy loss caused by liquid leakage from high pressure side to low pressure side. The materials with higher hardness should be selected for the sealing ring of impeller, guide vane sleeve and throttling in front of equalizing disc, and the heat treatment for improving wear resistance shall be stopped.

(2) When starting the feed water pump in cold state, it is required to warm up the pump according to the regulations. If the warm-up pump is not sufficient, large thermal temperature difference between the upper and lower parts of the pump body is easy to cause bow deformation of the rotor. At this time, starting the multi-stage centrifugal pump can easily make the internal sealing gap larger, form internal leakage and increase the loss of reflux volume.

(3) During the operation, the axial movement of the pump and the change of the discharge pressure after the equalizing plate shall be carefully monitored. During normal operation, when the discharge pressure after the equalizing plate changes greatly than the inlet pressure of the pump, timely maintenance shall be carried out to reduce the leakage loss and improve the volumetric efficiency of multistage pumps.

(4) When adjusting the load, it should be stable to prevent the water supply pressure from being shaken greatly, adhere to the continuous and stable operation of the feed pump, reduce the axial movement of the pump, so as to avoid the formation of seal clearance wear.