| 摘要 |
A seal balancing arrangement for a rotating or reciprocating shaft used in a high pressure and/or high velocity environment includes a plurality of grease balancing chambers each bordered by a pair of seals and filled with extreme pressure grease. The grease is compressed between the additional grease chambers by the movement of the first seal due to pressure acting on this seal by system internal pressures, thereby reducing pressure on the first seal while distributing the pressure between the remaining seals. The balancing chambers are arranged such that the grease in between the seals can be replenished through ports provided in a supporting housing, thereby extending the life of the seal assembly by allowing grease to lubricate the seal faces by extruding grease from each grease chamber. The seals may include a combination of stationary and floating seals, with the floating seals having different surface areas and optionally being connected by a piston, to vary the pressure in corresponding balancing chambers.
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