Vortex forward-extended double blade impeller sewage pump

Abstract

The invention relates to a non-clogging sewage pump, and provides a vortex forward-extended double blade impeller sewage pump. The sewage pump is characterized in that a double blade structure is adopted, the hub arranged at the centre of the inlet and outlet of an impeller passage is half the size of an ordinary impeller hub. The impeller is in a semi-open type. The stream lines of a front shroud and a back shroud of the blades extend forward to the direction of the inlet. Compared with an ordinary impeller, a forward-extension angle of the stream line of the back shroud is about 120 degrees, and a forward-extension angle of the stream line of the front shroud is about 45 degrees. A wrap angle theta of the blades is about 360 degrees. The vortex forward-extended double blade impeller sewage pump has the advantages that vortex forward-extended and double blades mode are adopted, the impeller passage is widened, the through capacity of sundries with long fiber and large particles is improved, the whole operating efficiency of the sewage pump is improved, the passage capacity and the anti winding performance are good, and the operating is stable.

Description

technical field [0001] The invention relates to a non-clogging sewage pump, in particular to a vortex forward-extending double-blade sewage pump, which belongs to the technical field of sewage conveying equipment. Background technique [0002] At present, the application fields of sewage pumps are becoming more and more extensive. When the sewage pump pumps the sewage and sewage medium, long fibers, large particles and other substances are often mixed in the medium, which makes the flow channel blockage and the impeller prone to occur when the pump pumps the substance. Winding and other problems, thus affecting the operation stability of the pump, delaying production operations and affecting work efficiency. However, problems such as flow channel blockage and impeller winding have been unresolved problems in the industry. Therefore, realizing non-blocking and high-efficiency operation of sewage pumps is a key technology that urgently needs to be solved. [0003] At present,...

AI Technical Summary

Problems solved by technology

These sewage pumps have a certain ability to transport sewage, but there are also serious deficiencies. For example, although the channel type and screw centrifugal sewage pumps have good passing capacity and high operating efficiency, their operation stability is poor. Its noise and vibration are relatively large; the swirling flow sewage pump has a strong passing capacity, but its operating efficiency is very low; although the sewage pump formed by widening the flow channel of a general clean water pump has relatively high operating efficiency, its passing performance is relatively low. Sewage pumps with other structural forms are worse

In short, high operating efficiency, good passing performance and good running stability are difficult to be organically unified in existing sewage pumps

[0004] After searching, the published patent "submersible cutting pump" (application number: 92215573.9) is a submersible pump with cutting function, which is composed of a motor, sealing parts, impeller, fixed knife and moving knife with cutting function, The fixed knife is fixed on the pump body, and the moving knife is integrated with the motor shaft and impeller, and rotates with the motor shaft. When it sucks impurities such as long fibers, weeds, feed, paper, etc., it will not be entangled and blocked. However, the cutting device is not the cutting function of the pump itself, but an additional cutting device on the pump, so that the structure of the pump becomes complicated, the manufacturing cost increases, and the operating efficiency and stability of the pump are greatly reduced

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