Electric motor driven pump
AssigneeEaton Corporation
InventorNicholas John HANSEN
Life of this patent
Estimating the term…
Abstract
An electric motor driven pump assembly configuration that includes an electric motor, a hydraulic pump driven by the electric motor is provided. The hydraulic pump is driven by the electric motor to convert electrical power into hydraulic power. A multi-inlet hydraulic pump enhances cooling flow through a pump case of the assembly and also enhances cooling flow for cooling the electric motor and corresponding drive/control components.
Claims20
An electric motor driven pump arrangement, comprising:
- an electric motor system including an electric motor that drives rotation of an output shaft;
- a main hydraulic pump driven by the electric motor though the output shaft to convert electrical power into hydraulic power;
- a cooling flow pump driven by the electric motor through the output shaft;
- a pump case enclosing the main hydraulic pump and the cooling flow pump;
- and
- the cooling flow pump having a first inlet in fluid communication with an interior of the pump case and a second inlet in fluid communication with a cooling flow path for cooling the electric motor system.
A method for cooling an electric motor driven pump arrangement that includes an electric motor system that drives an output shaft and a main hydraulic pump driven by the output shaft, the method comprising:
- scavenging energy from the output shaft to drive a multi-inlet cooling flow pump having a first inlet in fluid communication with a pump case that houses the main hydraulic pump, the multi-inlet cooling flow pump also including a second inlet in fluid communication with a cooling flow path routed through a motor case that houses the electric motor system.
An electric motor driven pump arrangement, comprising:
- an electric motor system including an electric motor that drives rotation of an output shaft and a digital electronic control system for controlling operation of the electric motor;
- a motor case housing the electric motor system;
- a pump case attached to the motor case;
- a main hydraulic pump driven by the electric motor though the output shaft to convert electrical power into hydraulic power;
- a radial vane pump driven by the electric motor through the output shaft, the radial vane pump including first and second inlets and a single outlet;
- a pump case enclosing the main hydraulic pump and the radial vane pump, the pump case including a case drain port;
- and
- the first inlet of the radial vane pump being in fluid communication with an interior of the pump case, the second inlet of the radial vane pump being in fluid communication with a cooling flow path routed through the motor case for cooling the electric motor system, and the single outlet being in fluid communication with the case drain port.
An electric motor driven pump assembly, comprising:
- an electric motor;
- a hydraulic pump driven by the electric motor to convert electrical power into hydraulic power, the hydraulic pump including two or more lobes;
- a side discharge and a case drain flow out provided by a combination of two discharge lobes;
- and
- separated dual inlets, having a pump case scavenge function provided by one lobe and a cooling-loop scavenge function provided by another lobe.
Dependencies are inferred from the claim text.