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离心式水泵需要用一套結构来减少空气、高压水由于外部压力或內部压力的作用而从泵壳和轉軸之間的間隙串流,否則排出端流出来的压力水沿軸散射,会影响工作环境和渗入滾珠軸承內稀釋潤滑剂;既定安装高度的水泵,由于吸入端串入空气后真空度减低,将吸不上水来。目前通用的离心式水泵轉軸通过泵壳的密封結构如附图a,是用填料(盘根)繞成环形放在轉軸与填料箱空間S内,由压盖8紧密地把它压紧。
Centrifugal pumps need to use a structure to reduce the air, high pressure water due to external pressure or internal pressure from the pump housing and the shaft gap between the flow, or discharge end of the pressure water out of the scattering along the axis of the water will affect the work Environment and infiltrated into the ball bearings dilute lubricant; given the installation of a high degree of water pump, due to the inhalation end into the air after the vacuum reduced, will not absorb water. At present, the universal centrifugal pump shaft through the pump housing seal structure shown in Figure a, is filled with packing (packing) around the shaft and packing box space S, tightly pressed by the cover 8 tightly.