The thermofluid dynamic pressure effect of mechanical seals-

The thermofluid dynamic pressure effect of mechanical seals
　2017-06-15　　
The thermofluid dynamic pressure effect of mechanical seals:
As shown in Figure 2-57, the upper part is a metal ring, and the lower part is a carbon graphite ring. The mechanical seal for custom-made ISR125-100-200B pumps flows through the gap at high speed along the scratches under the action of the pressure difference P2-P1. Due to friction, the high-speed U liquid is heated, and at the same time the metal surface is heated, causing it to expand under temperature. The temperature of the fluid and the surface of the metal ring gradually rises along the direction of movement, causing the metal to expand unevenly. Due to uneven heating, the metal surface between the scratches has an inclination, that is, the gap becomes a convergence gap. At this time, fluid dynamic pressure is generated on the metal surface.
According to the friction process in the sealing gap, hydrodynamics and thermoelasticity can be used to predict the above-mentioned hydrodynamic pressure effect.
The bearing capacity of the friction pair is:
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Mixed lubrication of mechanical seal and dry friction of seal 　　 mechanical seal