Pumps with mechanical seal device and using the technical main point must be thinking

Mechanical seal type is generally used for each type of pump. Mechanical seal is a kind of high precision seal installation, for installation and use conditions all have certain request. 1, mechanical seal device using ordinary measuring line ( 1) Find out the status of the equipment, to understand the equipment shaft rotational speed and diameter of axle; Equipment manufacturing precision and sealed cavity dimensions, equipment and the equipment using life of its place in the consumption process such as balancing thinking to do. （ 2) The budget of medium pressure. Pump seal chamber pressure of ordinary not pump outlet pressure, but lower than the pump outlet pressure ( 3) Find out sealing medium condition. To understand the status of sealing medium, is a gaseous or liquid media can contain particles and particles; Understand the nature of the medium, temperature, so that the reasonable selection and take the necessary cooling, washing, smooth action. 2, the use of mechanical seal device technology request ( 1) Mechanical seal parts of the shaft or shaft sleeve of the radial run-out tolerance. Shaft or sleeve surface roughness should fit technology request, the outer diameter size tolerance for h6. （ 2) The shaft axial channeling momentum not exceed 0. 2mm。 （ 3) In the face of shaft seal cavity end appearance run-out tolerance ( 4) Shaft or the shaft sleeve and seal cavity of end face have chamfer. （ 5) When walking on the high side, too low or medium temperature containing impurity particles, inflammable, explosive, toxic, should adopt the corresponding resistance sealing, irrigation, cooling, filtering, and other measures. （ 6) For some mechanical seal by the spring drive must pay attention to the helical spring, namely the axis direction of rotation should be spring is more and more tight, otherwise it will form a seal failure, spring to definitely choose by the following ways: by static ring to ring, shaft clockwise rotation by right-lateral spring, on the other hand, choose a left-handed spring.