In general mechanical seals, the center of the moving ring, the center of the static ring, and the center-line of the shaft are all on a straight line. If the center of the end face of a ring in the dynamic or static ring is offset from the center-line of the shaft by a certain distance , Can make the ring continuously bring in the lubricating liquid to the sliding surface to play a lubrication role during rotation.
It should be pointed out that the eccentric dimension should not be too large, especially for high pressure, the eccentricity will cause uneven pressure on the end face and cause uneven wear. For high-speed seals, it is not appropriate to use a moving ring as an eccentric ring, or the machine will vibrate due to the balance of centrifugal force.
Methods to extend the life of seal.
3. Sided eccentricity:
In general mechanical seals, the center of the moving ring, the center of the static ring, and the center-line of the shaft are all on a straight line. If the center of the end face of a ring in the dynamic or static ring is offset from the center-line of the shaft by a certain distance , Can make the ring continuously bring in the lubricating liquid to the sliding surface to play a lubrication role during rotation.
It should be pointed out that the eccentric dimension should not be too large, especially for high pressure, the eccentricity will cause uneven pressure on the end face and cause uneven wear. For high-speed seals, it is not appropriate to use a moving ring as an eccentric ring, or the machine will vibrate due to the balance of centrifugal force.
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