设计耐腐蚀或磨蚀性液体所使用的泵,其轴与壳体间的密封是个突出的问题,传统的填料盖或机械密封件使用寿命很短,需要经常维修更换。最近,英国LaBour Pump公司生产了一种由动力密封和静力密封相结合,被称为无填料盖的耐腐蚀泵,其结构特点是:在泵的主翼轮后另外装有一个副翼轮,使液体在离心力作用下远离泵轴,产生一高于泵工作压力的液体压力环,以形成动力密封,并防止外界空气的进入。这种动力密封方法过去曾在某些泵的设计上采用过,而LaBour Pump公司生产的这种耐腐蚀泵的独特之处,则在于 The design of a pump for use with a solution that is resistant to corrosive or abrasive fluids is a significant problem with the seal between shaft and housing. Conventional packing caps or mechanical seals have a short service life and require frequent maintenance and replacement. Recently, LaBour Pump Company in the UK has produced a corrosion-resistant pump, which is a combination of a power seal and a static seal, which is called unfilled lid. Its structure is characterized by an additional aileron wheel behind the main wing wheel of the pump, The liquid in the centrifugal force away from the pump shaft, resulting in a pressure above the pump liquid pressure ring, to form a dynamic seal, and to prevent the entry of outside air. This dynamic sealing method was used in the design of some pumps in the past, and LaBour Pump’s unique corrosion-resistant pump is unique