Electric motor driven inline hydraulic apparatus
AssigneeVickers, Incorporated
InventorAlbin J. Niemiec
Life of this patent
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Abstract
An electric motor driven inline hydraulic apparatus comprising a housing having end plates closing said housing, an electric motor stator mounted in said housing, an electric motor rotor, a shaft on which the rotor is mounted is journalled in the housing and a vane type pump mounted on one of the end plates. The shaft extends through an opening in the end plate and is connected to the vane rotor of the pump. Hydraulic fluid is supplied to the interior of the electric motor housing and flows through passages in the housing to the intake of the vane pump on the end plate. In one form, the vane pump delivers fluid through an outlet in the end plate on which it is mounted. In another form, the vane pump delivers fluid through an outlet in the pump housing.
Claims33
An electric motor driven inline hydraulic apparatus comprising:
- a housing having end plates closing said housing,
- an electric motor stator mounted in said housing,
- an electric motor rotor,
- a shaft on which the rotor is mounted journalled in said housing,
- a vane type pump mounted on one of the end plates,
- said vane pump including a cam ring, a rotor and vanes on said rotor engaging said cam ring,
- said vane pump having an inlet and an outlet,
- said shaft extending through an opening in the end plate and being connected to the vane rotor of the vane pump,
- said housing having an inlet through which hydraulic fluid is supplied to the interior of the housing and flows through passages in the housing to the intake of the vane pump on the end plate, such that the vane pump delivers fluid through an outlet on the end plate on which it is mounted, and
- an programmable controller for controlling the speed of the electric motor, said pump comprising a variable speed pump, solenoid operated unloading valves operably by said controller for controlling flow from the pumps in sequence for meeting the velocity demands.
An electric motor driven inline hydraulic apparatus for use in supplying hydraulic fluid to a plurality of hydraulic actuators in a hydraulic system, said apparatus comprising
- a housing comprising a body having open ends and end plates closing said ends,
- an electric motor stator mounted in said housing such that circumferentially spaced portions are spaced from the interior of said body,
- an electric motor rotor,
- a shaft on which the rotor is mounted,
- anti-friction bearings on the housing rotatably supporting said shaft in said housing and supporting said rotor within said stator to provide a radial gap between the stator and rotor,
- a self-contained radially balanced vane type pump mounted on one of the end plates,
- said vane pump including a cam ring, a rotor and vanes on said rotor engaging said cam ring,
- said vane pump having a pair of inlets and an outlet,
- said shaft extending beyond one of said bearings and being connected to the vane rotor of the vane pump,
- said housing having an inlet through which hydraulic fluid from the hydraulic system is supplied to the interior of the housing,
- said housing having passages extending to a substantially annular space at an adjacent end of said stator and rotor such that hydraulic fluid flows from said annular space and through said passages in the housing to the inlets of the vane pump on the end plate, such that the vane pump delivers fluid through an outlet on the end plate on which it is mounted to the hydraulic system,
- said flow from said inlet in said housing to said annular space being substantially parallel to the axis of said apparatus in one direction only through the spaced portions between the body of the housing and the gap between that stator and rotor to said annular space in said housing to said passages in said housing.
Dependencies are inferred from the claim text.