Precautions before submersible sewage pump mechanical seal equipment

Precautions before submersible sewage pump mechanical seal equipment (1) Before various sewage pump mechanical seal equipment, carefully check whether the number of mechanical seal parts meets the requirements and whether the components are damaged, especially whether the moving and static rings are bruised or cracked. , Deformation and other defects. If there is any doubt, it needs to be corrected or replaced with a new one. (2) Check whether the chamfer of the shaft sleeve or gland is proper, and it is necessary to repair it if it does not meet the requirements. (3) Before the mechanical seal equipment of the submersible sewage pump, it is necessary to clean the contact surfaces of the clean mechanical seal components and related equipment. The equipment should be kept clean during the process, especially the surface of the moving and static rings and its auxiliary sealing components should be free of impurities and dust. The surfaces of the moving and static rings are coated with a layer of clean mechanical oil or turbine oil. (4) In order to prevent the end face of the gland from deviating, after the coupling is corrected, the bolts should be even when the gland is tightened with the mechanical seal of the pump. Check each point with a feeler gauge, and the fault should not be greater than 0.05mm. (5) Use a feeler gauge to check the clearance (ie concentricity) between the gland and the outer diameter of the shaft or sleeve. The proximity should be even, and the allowable error of each problem should not be greater than 0.10mm. (6) The shrinkage of the spring should comply with the rules, and the appearance of too large or too small is not allowed, and the tolerance is ±2,00mm. When the shrinkage is too large, the specific pressure of the end face will increase, which will accelerate the wear of the end face. After the spring is installed, it should move flexibly in the spring seat. When the equipment is single spring, pay attention to the rotation direction of the spring, and its rotation direction should be opposite to the turning direction of the shaft. (7) When the equipment is moving the ring, it should be able to move flexibly, and the moving ring should automatically spring back after being pressed against the spring. (8) For the static ring of the equipment, first put the sealing ring on the back of the static ring and then install the mechanical seal in the sealing end cover. The verticality of the end face of the static ring and the center line of the end cover should meet the technical requirements. The anti-rotation groove on the back of the static ring The anti-rotation pins should be aligned, but not in contact. During the equipment process, do not damage the end face of the static ring. (9) During the equipment process, it is never allowed to hit the sealing element with something to prevent damage to the sealing element.