Mechanical sealing device for rotor pump

Abstract

The invention discloses a mechanical sealing device for a rotor pump. The invention aims to provide the mechanical sealing device for a centrifugal pump, and the mechanical sealing device is characterized in that an elastic piece which is not in contact with a medium, and the mechanical sealing device is resistant to corrosion and long in service life. The mechanical sealing device comprises a shaft sleeve, a gland, a sealing moving ring, a sealing static ring, a gasket and at least two compensation assemblies, wherein the sealing moving ring is limited on the shaft sleeve in the circumferential direction; the sealing static ring is in sealing fit with the gland; the gasket is used for carrying out circumferential limiting and axial limiting on the sealing static ring; a gap is formed between the gland and the gasket; the at least two compensation assemblies for axially limiting the gasket are connected between the edge, away from the sealing static ring in the radial direction, of thegasket and the gland; the compensation assemblies are arranged on the edge of the gasket; and the edge of the gasket protrudes outwards, therefore the compensation assemblies do not make contact withthe medium and is prevented from being corroded.

Description

Technical field: [0001] The invention relates to the technical field of mechanical seals, in particular to a mechanical seal device for a rotor pump. Background technique: [0002] Common mechanical seal devices in the industry, including shaft sleeves, glands, sealing dynamic rings, sealing static rings limited in the gland in the circumferential direction, springs for compressing the static rings and providing axial direction compensation, and sealing dynamic rings The circumferential limit is on the shaft sleeve, the sealing dynamic ring is sealed with the shaft sleeve, the sealing static ring is sealed with the gland, the sealing grinding surface is formed between the sealing dynamic ring and the sealing static ring, and the gland is equipped with a compensation spring and a spring set screw. The sealing dynamic ring in the above structure rotates with the rotation of the pump shaft, and the sealing static ring and the sealing dynamic ring form a sealing grinding surfac...

AI Technical Summary

Problems solved by technology

The sealing dynamic ring in the above structure rotates with the rotation of the pump shaft, and the sealing static ring and the sealing dynamic ring form a sealing grinding surface to realize the mechanical seal between the inside and the outside of the pump, but the mechanical seal of the above structure has the following disadvantages: compensation structure The springs are all built-in. In this installation method, the springs directly contact the medium, which will cause different degrees of corrosion, and are easy to block and affect the elasticity of the springs, thereby affecting the sealing performance of the entire sealing device; on the other hand, in the size of the mechanical seal In the case of a small size, the size of the spring is limited, and it is easy to fail, so that the spring cannot effectively compensate the static ring, thereby affecting the sealing performance of the mechanical seal device

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