A self-priming pump shaft axial sealing structure

Abstract

The invention belongs to the technical field of self-priming pumps, and specifically discloses a self-priming pump shaft axial sealing structure, including a pump casing, a pump shaft, a front sealing assembly and a rear sealing shaft; the pump shaft is horizontally arranged inside the pump casing , the surface of the pump shaft is respectively provided with a front seal assembly and a rear seal assembly; the front seal assembly includes a moving ring, a fixed rod and a rotating ring; the inner center of the moving ring is provided with a fixed rod, which passes through the center of the moving ring and is The two ends of the rod are fixedly connected with the inside of the moving ring; the pump shaft is located inside the impeller with a through hole, the size of the through hole matches the size of the fixed rod, and the moving ring is fixed to the pump shaft through the cooperation of the fixed rod and the through hole. connection; the outer side of the moving ring is provided with a rotating ring; a number of first extrusion springs are arranged between the moving ring and the rotating ring; the rear sealing assembly is arranged at the position where the pump shaft is located at the pump cover, and the rear sealing assembly includes static The ring, the first seal and the second seal; grooves are opened at corresponding positions on the surface of the pump shaft.

Description

technical field [0001] The invention relates to the technical field of self-priming pumps, in particular to an axial sealing structure for a pump shaft of a self-priming pump. Background technique [0002] A self-priming pump is a pump that sucks water up by itself during the start-up phase and puts it into normal operation. Through the special structure of the self-priming pump, it can be realized that no pre-watering is required for subsequent starts except for the need for irrigation at the first startup. Broadly speaking, there are many types of self-priming pumps, which can be divided into self-priming centrifugal pumps, self-priming mixed-flow pumps, and self-priming vortex pumps according to their working principles. In a narrow sense, when people refer to self-priming pumps, they generally refer to self-priming centrifugal pumps. Self-priming centrifugal pumps are divided into gas-liquid mixing type (including internal mixing type and external mixing type), water r...

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Problems solved by technology

[0003] Most of the sealing components of the self-priming pump are sealed by rubber bellows, but after the self-priming pump has been used for a long time, the sealing effect of the rubber bellows will often be reduced due to wear with the pump shaft, and even leakage occurs. In order to solve In the case that the sealing effect of the sealing component is reduced due to wear, we propose a self-priming pump shaft axial sealing structure

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