| 摘要 |
A fluid displacement vane pump with undervane pumping has a rotor assembly incorporating a plurality of T-shaped vanes. The outboard undervane surfaces are subjected to the pressure adjacent one side of the vane and the inboard undervane surface is subjected to the pressure adjacent the other side of the vane so that the vanes are hydraulically balanced in the seal arcs as well as in the inlet and discharged arcs. End caps mounted on the rotor function to isolate the undervane cavities and provide uninterrupted bearing surfaces capable of supporting a lubricating hydrodynamic film.
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