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Instructions for the use and type of mechanical seals

Requirements
1. Mechanical seal requirements for machine accuracy (taking pump mechanical seal as an example)
(1) The radial runout tolerance of the shaft (or bushing) on which the mechanical seal is installed shall not exceed 0.04 to 0.06 mm.
(2) The axial movement of the rotor does not exceed 0.3 mm.
(3) The locating tolerance of the positioning end face of the sealing cavity combined with the sealing end cap to the shaft (or bushing) surface shall not exceed 0.04~0.06mm.
2, the confirmation of the seal
(1) Confirm that the installed seal is consistent with the required model.
(2) Before installation, carefully compare with the assembly drawing, and the number of parts is complete.
(3) The mechanical seal adopting the parallel spring transmission, the spring has the left and right rotation points, and must be selected according to the rotation direction of the rotating shaft. [1] 6 troubleshooting reasons
Mechanical seal failures are generally known by abnormal leakage, abnormal wear, abnormal torque, and the like. The causes of the failure are roughly as follows:
1. The design of the mechanical seal is not correct;
2, the mechanical seal quality is not good;
3. The accuracy of the machine itself that uses or installs the mechanical seal does not meet the requirements;
4. The machine is operating incorrectly.

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