Axial flow pump

Abstract

The invention discloses an axial flow pump which comprises a shell part and a pump body part, and is mainly composed of a submersible motor, a bearing, a shaft, a guide vane, a shaft, an impeller andthe like. The pump body part of the axial flow pump is composed of the bearing, the motor, the guide vane, the impeller and the shaft. The blade tip clearance dimension of blades is reduced by 20-30%compared with the conventional size. The impeller is fixed to the rotating shaft and located below an inner cylinder of the guide vane, the appearance of the lower end of the shell is in a horn mouthshape, the blades are vertically arranged on the surface of a wheel center cone at a certain inclination and spacing, the structure is similar to a screw propeller having a small end radius and a large root radius, and the outlet portion is in an axial flow type. The novel axial flow pump is large in flow, free of clogging, high in efficiency and capable of saving energy, and has the advantages ofbeing easy to operate, convenient to maintain and low in price.

Description

technical field

[0001] The invention relates to the technical field of water pumps, in particular to an axial flow pump. Background technique

[0002] The head of conventional axial flow pumps is very low, generally more than ten percent of that of centrifugal pumps with impellers of the same diameter, so axial flow pumps cannot be used in conventional applications. Existing axial-flow mixed-flow pumps are all large-scale, driven by high-power three-phase asynchronous motors. Due to the structure of the motors, 4-pole or 6-pole or 8-pole motors are generally used, and the speed of the 50Hz power supply is 1450 rpm. Min, 980 rev / min, 730 rev / min, the pump caliber is a high-power pump with a diameter of more than 200mm, mainly used in low-lift and high-flow occasions, such as river drainage and irrigation, green alkali industry, etc. The existing axial flow pump has a low head and a large flow rate, but the pump efficiency is much higher than that of the commonly used centrif...

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