Adjustable submersible sewage pump impeller

Abstract

The invention provides an adjustable submersible sewage pump impeller. The flow and lift of a water pump can be adjusted so as to adapt to different working conditions. The adjustable submersible sewage pump impeller provided by the embodiment of the invention comprises a hub and wing-shaped blades. The hub is fixedly connected with the wing-shaped blades. The adjustable submersible sewage pump impeller further comprises a cover plate and an adjusting mechanism. The cover plate is provided with wing-shaped grooves. The wing-shaped blades penetrate through the wing-shaped grooves and are in clearance fit with the wing-shaped grooves correspondingly. The cover plate is in the shape of a drum provided with an open end and a closed end. The open end of the cover plate faces towards the hub. The side walls of the cover plate are located on the outer sides of the wing-shaped blades. The cover plate is connected with the hub through the adjusting mechanism. The adjusting mechanism is used foradjusting the lengths of the portions, stretching out of the cover plate, of the wing-shaped blades. According to the adjustable submersible sewage pump impeller provided by the embodiment of the invention, the drum-shaped cover plate sleeves the wing-shaped blades, the portions, covered with the cover plate, of the wing-shaped blades fail to do work on fluid, the position of the cover plate is adjusted through the adjusting mechanism, and accordingly, the lengths of the portions, stretching out of the cover plate, of the wing-shaped blades are adjusted, so that the flow and lift of the waterpump are adjusted so as to adapt to the different working conditions.

Description

technical field [0001] The invention relates to the technical field of submersible sewage pumps, in particular to an adjustable submersible sewage pump impeller. Background technique [0002] The submersible sewage pump is a kind of water pump with a wide range of applications. It is widely used in sewage plants, rainwater sewage lifting pump stations, urban flood control pump stations and other places. It has the characteristics of large flow capacity and convenient installation and use. But there are also some deficiencies in operation, for example, the design applicable working point is relatively fixed. The flow rate and head of the submersible sewage pump are rated at the factory, and there is a relatively fixed working point, but the actual working conditions often require different performance parameters. Phenomena such as overcurrent, vibration and cavitation, long-term operation under such deviation from working conditions will cause damage to the water pump; on th...

AI Technical Summary

Problems solved by technology

But there are also some deficiencies in operation, for example, the design applicable working point is relatively fixed

The flow rate and head of the submersible sewage pump are rated at the factory, and there is a relatively fixed working point, but the actual working conditions often require different performance parameters. Phenomena such as overcurrent, vibration and cavitation, long-term operation under such deviation from working conditions will cause damage to the water pump; on the other hand, the capacity of the sump of the pump station is fixed, and if the design is not appropriate, it may cause frequent pump failure. start, causing the motor to overheat and burn, and the safe operation of the process cannot be guaranteed

[0003] There are usually two ways to change the flow rate and head of the water pump: one is to change the outer diameter of the impeller, which is irreversible. After changing the diameter of the impeller, the water pump can only be used in a fixed working condition (fixed flow and head), due to the diversity and instability of rainwater discharge in modern cities, this method of changing the outer diameter of the impeller cannot be applied to the situation where the flow and head are variable; the other is to use frequency conversion motor frequency control to change Although the speed of the motor can also achieve the effect of changing the flow and head of the pump, the cost of the frequency conversion control cabinet and frequency conversion motor is high, and the investment is large, which is not good for the operation cost.

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