Axial force balance structure for submersible axial flow pump

Abstract

The invention relates to an axial force balanced structure for a submersible axial flow pump, which is composed of a water pump guide vane body, a pump shaft, an impeller and a pump body. The guide vane body is arranged inside the pump body, and presents a taper shape; a layer of clapboard is arranged in the guide vane body, and the pump shaft is arranged on the clapboard; a bearing and a mechanical seal are arranged between the pump shaft and the clapboard; the impeller is arranged at the lower end of the pump shaft and at the lower side of the guide vane body, a water inlet is arranged at the lower side of the impeller, and a water outlet channel is arranged among the upper part of the impeller, the guide vane body and the pump body; a pressure release hole is arranged on the sidewall of the guide vane body, and a sealing ring is arranged at the upper part of the impeller. The invention arranges the sealing ring at the upper part of the impeller, makes use of the antihunt action caused by the sealing ring to lead pressure water in the impeller outlet to pass through the pressure release hole on the guide vane body to release the pressure, reduces the axial force caused by the sectional area of a wheel hub, and enhances the reliability and the whole service life of the submersible pump with rather outstanding effect.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to a pump, in particular to a submersible axial flow pump, and in particular to an axial force balance structure for the submersible axial flow pump. Background technique: [0002] In the prior art, axial-flow pumps, or mixed-flow pumps, have the characteristics of large flow and are suitable for low-to-medium head applications, and are widely used in fields such as flood control and drainage, farmland irrigation, and water conservancy construction. The submersible axial flow pump has compact structure, convenient installation and maintenance, and low investment in pumping stations. It is increasingly favored by users and is an updated product of the traditional axial flow pump unit. The submersible axial flow pump is composed of a water pump guide vane body, a pump shaft, an impeller and a pump body. The guide vane body is arranged inside the pump body. The guide vane body is conical, and a...

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Problems solved by technology

[0003] The object of the present invention is to provide an axial force balance structure for a submersible axial flow pump, the axial force balance structure for a submersible axial flow pump needs to solve the problems of the inner impeller of the submersible axial flow pump in the prior art The axial force is all borne by the motor bearing or the bearing in the bearing seat, which leads to the technical problem of large bearing force

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