Sewage pump impeller with cutting function and sewage pump

Abstract

The invention relates to a sewage pump impeller with a cutting function and a sewage pump. The sewage pump impeller is designed as a semi-open type impeller with cylindrical blades. The casting and machining difficulty is reduced. The production cost is reduced. The risk of a long-fiber material wound around the impeller is reduced by reducing the wrap angle of the blades of the sewage pump impeller. Meanwhile, a cutting device is arranged at the front end of the impeller and can be used for cutting the long-fiber material and large-particle solid. Accordingly, the non-clogging performance ofthe sewage pump impeller is further improved. The designed cutting device is connected with the blades through screws, is convenient to replace and can achieve the protection effect on the impeller. The light and thin design of the cutting device has no influence on compactness and miniaturization of an original pump and has less influence on the open area. Cutting tools are provided with cuttingfaces in streamline transition and cannot cause rising of shaft power during working and have less disturbance on a flow field.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and particularly relates to a sewage pump impeller with a cutting function mainly suitable for conveying solids with entangled long fibers and large particles, and a sewage pump equipped with the impeller. Background technique [0002] In the actual application of the pump, there are few clear water conditions. At present, many industries need the application of multiphase flow pumps, such as sewage treatment, production and breeding, papermaking, pharmaceuticals, etc. For sewage pumps conveying various complex media, the anti-clogging performance is an important factor to measure the working performance of the pump. In order to achieve the coexistence of anti-clogging performance and pump efficiency of the pump, a lot of research has been done on the two-phase flow conditions in the pump and reflected in the design of the blade flow section. Various types of sewage pumps have larger impe...

AI Technical Summary

Problems solved by technology

This type of cutting knife has a complex structure, is not easy to process, and increases power consumption, which will cause a decrease in efficiency

Another water inlet structure of a submersible sewage pump includes a pump body, an outer filter, an inner filter, an accommodation chamber, a water inlet, an extension, an outer filter hole, a limit seat, an inner filter space, and a limit part. The above-mentioned outer filter is provided with an outer filter hole. This patent is also a type of anti-blocking device, but the filter is installed in front of the impeller inlet, which has certain requirements for the installation environment of the sewage pump, and a large amount of impurities are deposited in front of the filter. , after a period of time, it will cause blockage of the water inlet channel and reduce the working efficiency of the device

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