| 主权项 |
1. A scavenge gear pump, comprising:
a pump housing defining a pump chamber, an inlet passage, an outlet passage, and a fluid injection passage, said inlet passage and said outlet passage and said fluid injection passage, respectively, being in fluid communication with the pump chamber, said inlet passage receiving an admixed fluid at low pressure in which the admixed fluid includes a first fluid admixed with a second fluid, said outlet passage receiving said admixed fluid at high pressure from a downstream region of said pump chamber for output external to said scavenge gear pump, said fluid injection passage being disposed in the downstream region of said pump chamber, and said fluid injection passage receiving a third fluid at an injection pressure for input into the pump chamber, a pair of driveable gears disposed in the pump chamber which respectively include outward projecting, radially disposed teeth which are configured to intermesh in a gear meshing area disposed intermediate the pair of driveable gears in the pump chamber during operation of said scavenge gear pump, wherein the third fluid is injected directly into the gear meshing area of the pump chamber through the fluid injection passage during said operation of the scavenge gear pump so that the third fluid fills voids at least between said intermeshing teeth of the pair of driveable gears disposed in the gear meshing area such that said second fluid, which is admixed with at least one of said first fluid and said third fluid contained within the downstream region of said pump chamber, does not occupy the gear meshing area. |
