Environment-friendly and reliable pump rotor part

Abstract

The invention provides an environment-friendly and reliable pump rotor part. The environment-friendly and reliable pump rotor part comprises a pump shaft, an impeller, a flow guide casing, an impellerbearing assembly, a protective tube, an upper end cover, an upper bearing seat, an upper bearing, an upper shaft sleeve and a seal cover, wherein the impeller, the flow guide casing, the impeller bearing assembly, the protective tube, the upper end cover, the upper bearing seat, the upper bearing, the upper shaft sleeve and the seal cover are disposed on the pump shaft in a sleeving mode; the impeller bearing assembly is disposed above the impeller and comprises a lower bearing seat, a lower bearing and a lower shaft sleeve; an outer screw thread is disposed at the lower end of the pump shaft; a screw hole which is matched with the outer screw thread is formed in the impeller; thus connection between the pump shaft and the impeller does not need an impeller nut, the influence, on a flow field of a pumping medium, of the impeller nut is avoided, the smoothness of a hydraulic flow line of an impeller inlet is guaranteed, and the running energy consumption and the running vibration valueare lowered; and besides, a lubricating / cooling / flushing cavity is formed among a first through hole formed in the upper end cover, a cooling pipe disposed on the protective tube, a second through hole formed in the flow guide casing, a third through hole formed in the lower bearing seat, an annular groove formed in the lower bearing seat, a fourth through hole formed in the lower bearing, the flow guide casing, the protective tube, the upper end cover and the seal cover, wherein the first through hole, the cooling pipe, the second through hole, the third through hole, the annular groove andthe fourth through hole communicate in sequence, and the interiors of the flow guide casing, the protective tube, the upper end cover and the seal cover communicate.

Description

technical field [0001] The invention relates to the technical field of pumps for water treatment systems, in particular to an environmentally friendly and reliable pump rotor component. Background technique [0002] In the current existing water treatment systems, especially in various industrial, mining, living, aquaculture and other sewage treatment systems, when the sewage treatment system process requires the use of low-lift, high-flow medium flow for the circulation of sewage medium or During decomposition and oxidation, most of the pumping devices used are submersible pumps and axial flow pumps. Because the motor lubrication, sealing and leakage problems of submersible pumps are difficult to solve, and the pumped medium has a greater impact on the motor, axial flow pumps are often used in water treatment systems. [0003] In the prior art, the impeller of the rotor part of the axial flow pump is connected to the pump shaft through the impeller nut, which is located at...

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Problems solved by technology

[0003] In the prior art, the impeller of the rotor part of the axial flow pump is connected to the pump shaft through the impeller nut, which is located at the inlet of the impeller, and the shape of the impeller nut directly affects the flow field distribution of the pumped medium. Due to the solid effect, the streamline between the impeller nut and the impeller cannot transition smoothly, causing the pumped medium to generate vortices in the impeller nut, affecting the hydraulic performance of the impeller, affecting the pumping efficiency of the pump, and increasing the energy consumption of the pump, and the end surface of the impeller nut is almost vertical On the plane of the pump shaft, when the pumped medium enters the pump body through the impeller, the end face of the impeller nut will produce a certain resistance to the pumped medium, forming a large impact on the impeller nut, causing the pump shaft to vibrate and affecting the pumping performance. Running stability, the pumping medium continuously washes the impeller nut, which affects the service life of the impeller nut

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