新型沼气断状秸秆液料潜水电泵设计与试验

针对传统潜水电泵在沼气液料输送过程中存在的缺陷，研制了一种适用于沼气断状秸秆液料输送的新型无堵塞污水潜水电泵，解决了沼气液料输送过程中加料设备易堵塞、成本高和产气效率低等问题。该新型电泵具有良好的物料切割系统，切割装置在泵壳下端固定切割板上，切割板下端设有环状外切割刀，割刀中间设有旋转螺旋刀片，形成了对进口秸秆液料水平和垂直方向的切割作用；固定切割板上端面设有环状切割凹槽，叶轮旋转时对物料形成二次切割，使液料流动更流畅。潜水电机部分设计了内循环冷却装置，改变了传统潜水电泵不能长期在非潜水状态下使用的技术难题。 

Design and Test on a New Submersible Electric Pump for Broken-Straw Liquid in Biogas Project

A new type sewage submersible electric pump used for biogas broken-straw liquid transportation and no-blocking was designed according to traditional submersible pump defects in the process of conveying in biogas liquid.Problems of easy to plug，high cost and low gas production efficiency in biogas liquid conveying process were solved.A cutting system was designed for broken straw liquid.Cutting device on the pump shell bottom was fixed cutting board.A ring cutting knife was on the bottom of fixed cutting board.Between the ring cutting knife，there were some rotating spiral blades.The blades would cut the imported liquid straw in horizontal and vertical direction.There were also some circular cutting grooves fixed on top of cutting board.While impeller rotated，liquid straw would be cut secondly.This cutting action made liquid flow more smoothly.An inner loop cooling device was designed for submersible motor.The cooling device made submerge easy in a long time while the traditional submersible pumps couldn′t be.