A self-priming sewage pump with double-port ring seal

Abstract

The invention discloses a self-suction sewage pump with double port rings sealing. The self-suction sewage pump comprises a water suction chamber, an impeller with cutting blades, a front sealing ringwith cutting grooves, a rear pump cover with cutting grooves, a mechanical seal, a backflow hole, a pump body, a gas-liquid separation chamber, a pump shaft and a bearing body; the impeller with thecutting blades is arranged on the pump shaft, and is connected with the pump body through the rear pump cover with the cutting grooves and the bearing body; the cutting blades are uniformly distributed on the edges of an impeller front cover plate and an impeller rear cover plate in a 360 degrees / n separation mode; n groups of blades are arranged on each cover plate, wherein n is an even number, and the edge orientations of the blades are consistent with the rotation direction of the impeller; and the front sealing ring and the rear pump cover are static parts, and n cutting grooves which areuniformly distributed are formed in the inner side edge of each of the front sealing ring and the rear pump cover. According to the self-suction sewage pump with double port rings sealing, the problems that the port rings of the self-suction sewage pump are easily clamped and the machine seal is prone to abrasion are solved; and meanwhile, the double-port ring sealing type of the impeller greatlyreduces the liquid flow of high-pressure fluid back-flowing from an impeller outlet to an impeller inlet, the energy loss is reduced, and the pump efficiency is improved.

Description

technical field [0001] The invention relates to a double-port ring-sealed self-priming sewage pump, which belongs to the technical field of fluid machinery and is mainly used to solve the problems of easy jamming of the mouth ring of the self-priming sewage pump and easy wear of the mechanical seal, so as to ensure the stable and reliable operation of the pump and improve the pump performance. its working efficiency. Background technique [0002] The self-priming sewage centrifugal pump has the advantages of compact structure, small footprint, convenient installation and maintenance, stable operation, long continuous operation time, long life, and no irrigation and diversion problems, so it has been widely used in various industries. Due to the particularity of the working environment of the self-priming sewage pump, in order to prevent fibers and impurities in the conveying medium from clogging the impeller and the mouth ring, it is necessary to improve the structure of the...

AI Technical Summary

Problems solved by technology

However, this structure can only reduce the leakage between the impeller and the pump body mouth ring, but cannot effectively control the leakage between the impeller front cover and the pump body, and between the impeller rear cover and the pump cover. The energy loss due to liquid leakage is still relatively large

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