Mechanical seal hydrodynamic seal-

Mechanical seal hydrodynamic seal

　2017-06-11　　

Mechanical seal and hydrodynamic seal:

Figure 2-47 shows a hydrodynamic seal of a waviness surface model. The figure is expressed in cylindrical coordinates.

The lower part of the Johncrane 609 mechanical seal is a plane ring that rotates at an angular velocity w, and the upper ring has a certain degree of waviness and is stationary. In the condition of full liquid lubrication, the liquid film is continuous, the mass force of the liquid is ignored and the pressure is constant in the direction of the liquid thickness, and the fluid flow is laminar. The NS equation introduces boundary conditions in the form of formula (2-10).

Instant membrane pressure

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Comparison of several fluid film models of mechanical seals (2) 　　 hydrostatic effect of mechanical seals