八种泵型比较.docx

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八种泵型比较

Prepare a word to compare the properties and application range of different pump. Pneumatic ejector(气动喷射泵); torque flow pumps (旋流泵);Plunger(柱塞泵); centrifugal(离心泵); diaphragm(隔膜泵); progressive cavity (螺杆泵); rotary lobe(凸轮转子泵); chopper hose (带切碎软管泵) Pneumatic ejector The properties and application: Use of Jet(喷射) of high pressure working fluid transmission fluid pump,which constituted by the nozzles(喷嘴), mixing rooms and expansion tube。 Working fluid at high pressure through the nozzle at high speed when shooting, mixed indoor generate low voltage(低压), the transported fluid was soaked in the mixing room, with which the working fluid is mixed together into a wider tube. In the expanded tube, fluid pressure is increasing; and then discharge from the tube. According to the working fluid,the pump include the steam jet pump and water jet pump. Simple structure, easy to use .But head of small,and inefficient, transmission fluid and working fluid mixing and dilution(稀释). So the scope of the application is limited, for the chemical industry and power engineering. 气动喷射泵 利用高压工作流体的喷射作用来输送流体的泵,由喷嘴、混合室和扩大管等构成。工作流体在高压下经过喷嘴以高速度射出时,混合室内产生低压,被输送的流体被吸入混合室,与工作流体相混,一同进入扩大管。在经过扩大管时,流体的压力又逐渐上升;然后排出管外。 根据所用的工作流体,一般分为蒸汽喷射泵(steam jet pump)和水喷射泵(water jet pump)两类。构造简单、使用方便。但产生压头小,效率低,且被输送的流体因与工作流体相混而被稀释,使其应用范围受到限制。用于化学工业和动力工程等方面。 torque flow pumps The properties and application: The working principle is when the impeller(叶轮) rotates medium under the effect of the centrifugal force(离心力) energy increases, enter the leaves between the medium by the push of the blade together with the impeller motor.Medium in circulation flow under the action of obtain energy, most does not pass through the impeller, and in the vaneless cavity movement (无叶腔运动)after the pump outlet, thereby conveying complex medium or fluid containing impurities to. Non blocking performance. Good wear resistance. Have good anti-cavitation (抗蚀)formance.And hydraulic loss is big. Used for pumping in complex medium

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