How to prolong the service life of mechanical seal of centrifugal pump? give a hearing Mechanical seal manufacturer How do I say this?
1. The centrifugal pump shaft has a large displacement. During the operation of the centrifugal pump, the sealing surface of the mechanical seal needs to have a certain specific pressure. Only in this way can the role of the mechanical seal be ensured. Therefore, this requires that the spring of mechanical seal must have a certain amount of compression. With this amount of compression, it can give a thrust to the seal face. After rotating, it can make the seal face have a standard specific pressure. In order to maintain the stability of this specific pressure, it is required that the displacement of the mechanical seal shaft of the centrifugal pump should be controlled within a scientific range. However, in the design of mechanical seal, due to the influence of unscientific design and other factors, the pump shaft often has large displacement, which affects the use effect of mechanical seal.
2. The axial force of centrifugal pump is too large. The mechanical seal of centrifugal pump cannot bear the axial force when it is used. When the axial force appears, it will have a very serious impact on the mechanical seal of centrifugal pump. This is because when the mechanical seal bears the axial force, it will cause a rapid rise in the temperature of the seal gland, making the polyene medium melt, which affects the effect of the mechanical seal of the centrifugal pump. When the centrifugal pump is refined, the seal face will have intermittent leakage and other problems.
3. The deflection of the centrifugal pump shaft is too high. As a contact type mechanical dynamic seal in the rotating axis, the mechanical seal of the centrifugal pump performs its function under the dual role of the fluid medium and the elastic element. When it functions, the two sealing faces of the mechanical seal that are perpendicular to the axis line closely fit, and then when it rotates relatively, the sealing effect is achieved. Therefore, during the design, the force on the two seal faces must be uniform, and no large deflection can occur.
4. The centrifugal pump runs with excessive vibration. When the mechanical seal runs, if the vibration of the mechanical seal is too large, the sealing effect will eventually be lost. However, most of the reasons for the larger mechanical seal are due to their own reasons. Other parts of the centrifugal pump are the main causes of vibration. If the design of the centrifugal pump shaft is unreasonable, the coupling parallelism is not standard and other factors affect the service life and effect of the mechanical seal of the centrifugal pump.