Integral mechanical sealing device for pump

Abstract

The invention discloses an integral mechanical sealing device for a pump. The integral mechanical sealing device comprises a spring base, a spring located in the spring base, a movable ring base with one end clamped with the spring base, a movable ring which is clamped with the other end of the movable ring base and rotates at the same speed of a pump shaft, and a fixed ring assembly which is fixed relative to a motor base, wherein the spring base, the spring, the movable ring base, the movable ring and the fixed ring assembly are sequentially sleeved along the pump shaft in a direction from an impeller to the motor base. The movable ring base comprises a first body which is respectively clamped with the spring base and the movable ring, and a second body abutted against the spring. A sealing ring is arranged between the second body and the movable ring; the cross section, which passes through an axial lead of the pump shaft, of the sealing ring is a vertical 8-shaped; and the sealingring is integrally structured. By utilizing the technical scheme, compared with the prior art, the integral mechanical sealing device for the pump provided by the invention has the following advantages: 1, the integral mechanical sealing device is wide in application range, simple in assembly, easy to install and replace, and convenient in maintenance; and 2, the integral 8-shaped ring is mountedin a sealing chamber to seal, so that the possibility of sealing leakage is greatly reduced.

Description

technical field [0001] The invention relates to an integral mechanical seal device for a pump. Background technique [0002] As far as the existing integral mechanical seal device is concerned, when the pump is running, the mechanical seal is driven by the friction between the set screw and the pump shaft to drive the mechanical seal to run; When affected by other factors, it is easy for the sealed medium to leak through the O-ring through the shaft, moving ring, and static ring; moreover, the friction force of the set screw is also susceptible to failure due to the influence of other factors, so that The mechanical seal is not functioning properly. In addition, in order to reduce the cost of the existing mechanical seal theoretically (the overall cost has not been reduced), the static ring is inlaid with high-temperature carbide and stainless steel, and then an O-ring is added to the outer periphery of the seal, so that there is an additional invisible source of leaks. ...

AI Technical Summary

Problems solved by technology

[0002] As far as the existing integral mechanical seal device is concerned, when the pump is running, the mechanical seal is driven by the friction between the set screw and the pump shaft; There is an O-ring inside the seal. When the O-ring is affected by factors such as pressure and temperature, it is easy for the sealed medium to leak through the O-ring through the rotating shaft, moving ring and static ring; The friction force of the screw is also susceptible to failure by other factors, so that the mechanical seal cannot operate normally

In addition, in order to reduce the cost of the existing mechanical seal theoretically (the overall cost has not been reduced), the static ring is inlaid with high-temperature carbide and stainless steel, and then an O-ring is added to the outer periphery of the seal, so that there is an additional invisible leak source

[0003]Cemented carbide static ring and stainless steel inlay often cause leakage at the junction due to factors such as different media and temperature changes, which affects the normal use of the equipment. And there is only one O-ring seal on the periphery, which is also prone to leakage problems

[0004] In addition, the existing mechanical seal device has a small margin for up and down adjustment, which increases the processing difficulty and precision of the matching parts. If the installation exceeds the mechanical seal If the installation adjustment height is too small, the sealing effect will not be achieved. If the adjustment distance is too small, the friction between the dynamic and static rings will increase, thus greatly shortening the running time of the mechanical seal.

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