Semi-open impeller pump with sealing cover plate structure

Abstract

The invention discloses a semi-open impeller pump with a sealing cover plate structure, which comprises a pump casing and a pump rear cover, an impeller and a pump shaft which are installed in the pump casing, and a motor which is arranged on the outer side of the pump casing. The impeller is installed on the pump shaft and is driven by the motor to rotate; and an inlet pipe and an outlet pipe are arranged on the pump casing. The impeller adopts a semi-open structure and comprises a vane, a wheel hub and a rear cover plate and is characterized in that the inlet pipe extends into the inner part of the pump casing from the outer part of the pump casing; the rear end of the inlet pipe is positioned at the front end of the vane of the impeller and shares one shaft with the pump shaft; and a ring-shaped sealing cover plate is installed at the rear end of the inlet pipe; the end surface of the sealing cover plate is parallel with the front end surface of the vane, and end cover sealing is formed between the both. The molded line of the vane adopts a variable camber curve, the camber of the curve is gradually reduced from the inlet to the outlet, and the camber is minimal at the outlet. The semi-open impeller pump has the advantages of simple manufacture process, convenient processing, low cost, stable structure, good passing ability of solid particle, smooth overflowing and high efficiency.

Description

technical field [0001] The invention relates to a water pump, in particular to a semi-open impeller pump formed by stamping and welding a metal plate and having a sealing cover plate structure. Background technique [0002] Now with the development of society, the centrifugal pump with semi-open impeller structure is a kind of centrifugal pump product with large demand and wide application. delivery. In the prior art, when this type of centrifugal pump product is used, if the liquid is thick or the liquid contains a small amount of solid particles, the liquid is easily blocked during the flow in the impeller, and the passability is poor. [0003] The Chinese patent application number 99111134.6 discloses a "stamping and welding forming centrifugal pump and its manufacturing method". The centrifugal pump consists of an inlet flange, an outlet flange, a back cover, a pump casing and an impeller. The pump casing has a pump casing It is stamped with the impeller to form a full...

AI Technical Summary

Problems solved by technology

Although the stamping and welding food pump forms an end face sealing structure between the impeller and the pump casing so that its passability is slightly improved, the structure also has the following disadvantages: 1) The structure of the pump casing is complicated, and the manufacturing process requirements are increased. The manufacturing difficulty, cost and manufacturing time of the pump casing are reduced; 2) Since the end face matched between the impeller and the pump casing is an inclined surface, it is required that the front end face of the blade must be parallel to the front shell of the pump casing, which increases the impeller blade production difficulty

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