Mechanical seal installation and maintenance plan to explain the mechanical seal

Explanation of mechanical seal installation and maintenance plan

At present, most of the torsion equipment in enterprises use mechanical seals to protect the non-leakage between the dynamic and static sealing surfaces, but the mechanical seal is a relatively precise part of the equipment, and the requirements for technicians in the process of operation and maintenance are relatively high. Gao, let me introduce a few problems of mechanical seal repair.

Installation of mechanical seal

The quality of operation and the length of life in the application process of mechanical seals are partly due to the working environment of the mechanical seals given by the equipment itself. Therefore, it is necessary to carefully check the equipment before installing the mechanical seal, which will reduce the possibility of mechanical seal failure and improve the service life of the mechanical seal. The equipment needs to be checked in the following aspects:

(1) The hole diameter and depth of the seal chamber should be similar to the size on the installation drawing of the seal assembly.±Within 0.13mm; the size deviation between the shaft and the sleeve should be within±0.0.3-±0.05. The axial runout of the shaft needs to be checked, and the total runout should not exceed 0.25mm in theory; the radial runout of the shaft is generally less than 0.05mm. Excessive radial runout may cause wear between the sealing sleeve and the shaft; the self-test leakage of the sealing surface will increase, which will affect the overall working environment of the seal and reduce the service life of the seal;

(2) Check the curvature of the shaft. The maximum curvature should be less than 0.07mm.

(3) Check the alignment between the seal chamber hole and the shaft, and the error should be less than 0.13mm. Failure of the seal cavity and the shaft will affect the dynamic load between the sealing surfaces, thereby reducing the operating life of the seal.