| 摘要 |
A rotary pump of unitary rotor construction disposed within a housing having a cylindrical inner surface. A tubular shaft extends from one end of the rotor and supplies fluid to the axis of the rotor. A pair of axially spaced cylindrical disks concentric with the shaft form with the inner wall of the housing a pump discharge chamber. A pair of cylindrical pumping cams eccentrically formed on the shaft are disposed outwardly of said cylindrical disks with the eccentricity or high point of one cam being diametrically opposite the high point of the other. A pair of radially movable gate members urged into engagement with diametrically opposed surfaces of each of said cams define with the outer surface of the cam, the housing and concentric disks four separate fluid chambers, one on each side of said gates. The gates engaged with one cam lie in a plane approximately perpendicular to a plane containing the gates engaged with the other cam. A suction port extends radially from the bore of the tubular shaft to the outer surface of each cam and a pressure or discharge port extends axially from the outer surface of each cam into communication with the annular discharge chamber disposed intermediate said cams. The suction and pressure ports of each cam are located on opposite sides of its high point and located diametrically opposite the suction and discharge ports respectively of the other cam.
|
