If you ignore the steam pressure， fluid dynamic friction loss and wellbore liquid pump suction， open an open chamber the maximum production pressure difference is 0.1Mpa， as long as the pressure drop between the inlet and the chamber to form a chamber is less than the pressure difference， the wellbore fluid will be filled with the chamber， then screw pump can achieve the displacement perturbation theory.当流体压力降到蒸汽压力以下，则出现气蚀现象。如果一部分敞开的腔室被流体的蒸汽所充满，当腔室封闭、转子施加正压力后，蒸汽则凝析，会使泵出现脉动和噪音。因此，为使泵能达到其理论排量和正常运转，要求流体压力大于其蒸汽压力，并且吸入压降小于

工业生产和人们日常生活总是要产生污水，污水处理的压力实在是不小。当前主流的方法是对污水处理之后得到的污泥（含水率高）进行脱水干燥，对干燥后的污泥进行集中处置，焚烧或填埋。

　　但是，处置机构对污泥是有要求的，一个硬性指标便是含水率，含水率不达标的污泥无论是进行焚烧还是填埋，都容易产生潜在危害；同时，降低含水率对于企业减少污泥总量、降低处置成本也很重要。

B、流体粘度对工况的影响The effect of B and fluid viscosity on the working condition随着流体粘度的增加，由于产生较高的压降使泵的排量下降。As the viscosity of the fluid increases， the displacement of the pump decreases as a result of high pressure drop.C、泵磨损影响Effect of C and pump wear螺杆泵的工作转速通常为40至500r/min，为减少由于磨损而带来的维修工作量，应当随流体的磨蚀性增加而降低泵的转速。研究表明，泵的磨损与流体流速成正比，螺杆泵转子，但是低的转速对井下泵的使用寿命又产生不利的影响。The working speed of the screw pump is usually 40 to 500r/min. In order to reduce the maintenance workload caused by wear， the speed of the pump should be reduced with the increase of the abrasive wear of the fluid. The study shows that the wear of the pump is proportional to the flow velocity of the fluid， but the low speed of the pump has a negative effect on the life of the downhole pump.


螺杆泵转子-螺耐斯(图)由武汉螺耐斯环保设备有限公司提供。武汉螺耐斯环保设备有限公司坚持“以人为本”的企业理念，拥有一支的员工队伍，力求提供更好的产品和服务回馈社会，并欢迎广大新老客户光临惠顾，真诚合作、共创美好未来。螺耐斯——您可信赖的朋友，公司地址：湖北省武汉市蔡甸区奓山街工业园，联系人：余经理。