Abstract: it is necessary to kaiquan pump mechanical seal condition condition of main engine choose suitable type of mechanical seal data match to ensure the normal industry pump mechanical seal for service life device mechanical seal part radial runout service 0. Axial momentum of 04mm rotor is 0. 1mm device mechanical seal stop seal shell positioning end facing the shaft straight 0. 04mm mechanical sealing device is necessary for shaft sleeve sealing cavity sealing liquid dynamic pressure bearing commonly used shaft housing shaft

1) it is necessary to select suitable type of mechanical seal and data matching according to the working condition of Marine mechanical seals and the condition of main engine; Ability to ensure normal operation and service life.

2) the radial runout service of the shaft (shaft sleeve) at the mechanical sealing part of the device shall be ≤0. 4 mm; The axial channeling momentum of the rotor is ≤0. 1 mm.

3) sealing end cover (or shell) of mechanical seal stop ring; The straightness of the positioning end facing the axis is ≤0. 4 mm.

4) when the mechanical seal is in the device; It is necessary to clean the shaft (shaft sleeve), sealing cavity, sealing end cover and mechanical seal itself; Avoid any impurities from entering the sealing area.

5) when the transport medium temperature is too high, too low, or rich in impurity particles, flammable, explosive, toxic; It is necessary to refer to relevant specifications of mechanical seals; Adopt the corresponding measures of blocking, scour, cooling and over-consideration.

6) mechanical sealing device; Should be properly smooth. According to the product device instructions; Ensure device dimensions of mechanical seals.

7) it is necessary to fill the medium before the equipment works; To avoid dry conflict and seal failure.

8) mechanical seal with single tension spring drive in the sample; Reasonable selection of tension rotation; Usually from the end of the stop ring; When the shaft turns clockwise; Should choose the right tension. On the other hand, choose the left tension.