多级离心泵动力楔防磨平衡盘的设计

A dynamic wedge balance disc for multistage centrifugal pumps

针对多级离心泵易出现平衡盘与平衡盘座贴合而引起平衡盘及泵损坏的现象 ,设计出多级离心泵动力楔防磨平衡盘。其结构特点是 :当平衡盘向平衡盘座靠近时 ,动力楔可产生巨大的开启力 ,从而起到防止平衡盘与平衡盘座贴合的作用。经一段时间的运行试验 ,平衡盘工作正常 ,工作面无磨损和划痕 ;平衡管压力稳定 ,并由原来的 4 5 0～ 5 0 0kPa降到低于 4 0 0kPa ,实现了逆流泵送功能。该动力楔平衡盘不仅能延长平衡盘使用寿命 ,而且能减小平衡盘间隙泄漏量 ,节能降耗。

When the balance disc of a multistage centrifugal pump touches its seat, serious abrasion may occur. A dynamic wedge balance disc is thereby designed. Once the balance disc gets very close to its seat, the opening force may increase greatly and this can prevent the balance disc from keeping contact with its seat. Application shows this anti-erosion balance disc can prevent effectively the disc-seat contact.