How should the mechanical seal check the shaft curvature? Machinery Seal

How should the mechanical seal check the shaft curvature?

2021-07-05 11:22

The mechanical seal is a kind of mechanical seal specially used for reactors, pump equipment and equipment with very high sealing requirements. It can provide a good sealing environment for a lot of equipment. It is a part of some equipment that needs to be sealed, and it is also a part that needs to be used to prevent external bacteria from entering. It enhances the sealing of the equipment. During daily inspections, in addition to checking its sealing, its shaft How should the curvature be checked?

1. The maximum curvature of the shaft should be less than 0.07mm. Runout inspection on the surface of the sealed chamber, the runout on the surface of the sealed chamber should not exceed 0.13mm.

2. If the surface of the sealing chamber is not perpendicular to the shaft, it may cause mechanical seal failure. Because the sealing gland is fixed on the sealing gland by bolts, the sealing cavity jumps too much, causing the installation of the gland to be skewed, which in turn causes the static sealing ring to be skewed, resulting in abnormal shaking of the entire seal.

3. The wear and tear of the auxiliary seal between the mechanical seal and the shaft or sleeve will also increase, and the abnormal shaking of the seal will also cause wear and fatigue of the metal bellows or transmission pin, resulting in premature failure of the seal. Cooling is to protect the mechanical seal and prevent the sealing surface from burning out. In fact, the water can be purchased and reused at the same time. After passing through the cooling tower, it can be used repeatedly. Ordinary tap water is used for toileting. It is not necessary to use pure water. If pure water must be used, it may be due to the consideration of the materials to be transported.