Coefficient of friction of mechanical seal-

Coefficient of friction of mechanical seal

　2017-07-17　　

Friction coefficient of mechanical seal:

Friction coefficient is a very important performance parameter of contact mechanical seal. The friction state of the end face of the mechanical seal usually includes boundary friction, fluid friction and mixed friction. Under normal circumstances, the contact mechanical seal is in a state of mixed friction. Therefore, the friction coefficient mainly includes the fluid friction coefficient and the contact friction coefficient.

The friction coefficient of a mechanical seal can be defined as the ratio of the total friction force of the seal end face to the total load (closing force). which is

In the above formula, the total friction force of the seal end face includes two parts: the fluid viscous shear friction force and the contact friction force of the seal end face asperities, namely

The friction coefficient of the contact mechanical seal in the mixed friction state can be expressed as

In the calculation of the heat, friction power consumption and flushing volume of the mechanical seal, it is necessary to select the friction coefficient correctly. In addition to using simulation experiments to find the coefficient of friction and doing experiments on the coefficient of friction of materials, you can refer to the existing detailed data for selection.

See Table 1-12 and Table 1-13 for the friction coefficients of some friction pairs of mechanical seals and the contact friction coefficients of some materials when paired with carbon graphite.

Table 1-13 Contact friction coefficient of some materials when paired with carbon graphite

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