Parker-Hannifin Corporation

Parker-Hannifan Plc

Hao Zhang

Blake Adam Carl

James Howland

Satish Kumar Raju Kalidindi

Raymond E Collett

Nicholas N White

Yu-Sen James Chu

Richard D Kimpel

Jeff Cullman

Zhesheng Jiang

Steven R Huard

Joseph A Kovach

Dale Vanderlaan

James H Blalock

Steven C Rink

Frank Iannizzaro

Stacy H Turner

Bogdan Kozul

Germano Franzoni

Clyde Bennett Stevens

Peter Stambro

Brandon Wegmann

Patrick Stegemann

Lisa K Furches

Nithin Gangadharan

Yong Woon Jeon

Stephen Brunton

Shawn Vogel

Michelle Tauchen

Dennis C Allen

Suresh Natarajan

Brian Burgess

Robb Fisher

Nick White

Rajneesh Kumar

Lori A Martinelli

Blake Carl

Blake A Carl

An example assembly includes a main housing having an internal chamber therein; an electric motor disposed in the internal chamber of the main housing and comprising (i) a stator that is fixedly-positioned in the internal chamber of the main housing, and (ii) a motor rotor positioned within the stator and rotatable relative to the stator; a hydraulic pump positioned in the main housing, at least partially within the motor rotor of the electric motor, wherein the hydraulic pump is configured to receive fluid from an inlet port and provide fluid flow to an outlet port, wherein the hydraulic pump comprises a pump drive shaft rotatably-coupled to the motor rotor of the electric motor; and a plurality of cooling fluid channels formed in the main housing and configured to allow fluid to circulate through the main housing to cool the main housing.

Systems and assemblies for an electric motor with integrated hydraulic pump and electronic drive device

An example gear pump includes a pump ring gear; a pump shaft; a pump pinion mounted to the pump shaft and disposed within the pump ring gear, such that external teeth of the pump pinion engage with internal teeth of the pump ring gear, wherein the pump shaft is configured to rotate the pump pinion, thereby rotating the pump ring gear engaged therewith to displace fluid from an inlet chamber to an outlet chamber; one or more cross-holes; a bushing disposed about the pump shaft; and a pocket formed about a portion of the bushing, wherein the one or more cross-holes fluidly couple the outlet chamber to the pocket, thereby causing fluid in the pocket to apply a supporting force to the pump shaft.

Hydraulic gear pump with hydrostatic shaft bearing and isolated case drain and method of operating a hydraulic gear pump

An example assembly includes: a main housing () having an internal chamber () therein; an electric motor () disposed in the internal chamber of the main housing and comprising a motor rotor (); a cooling inner ring () disposed in the internal chamber of the main housing about the electric motor, wherein the cooling inner ring comprises one or more motor cooling fluid channels configured to receive cooling fluid from an external source of cooling fluid and allow cooling fluid to flow about the electric motor to cool the electric motor; a hydraulic pump () positioned in the main housing, at least partially within the motor rotor of the electric motor; and an enclosure () coupled to the main housing and comprising (i) an inverter board () disposed therein, and (ii) one or more inverter cooling fluid channels configured to allow cooling fluid from the external source to cool the inverter board.

Integrated assembly of an electric motor, hydraulic pump, and electronic drive device and associated cooling configuration

An example gear pump includes a pump housing having a pump housing channel and an arcuate groove disposed in an interior surface of the pump housing; a pump ring gear disposed within the pump housing and rotatable relative to the pump housing; a pump pinion disposed within the pump ring gear, such that teeth of the pump pinion engage with internal teeth of the pump ring gear; and a pump port block having a first port and a second port, wherein as the pump pinion rotates within the pump ring gear, fluid is drawn through the first port and provided to the second port for discharge, wherein a portion of fluid being provided to the second port is provided to the pump housing channel, wherein fluid from the pump housing channel is provided to the arcuate groove to apply a radially-inward force on the pump ring gear.

Assemblies for a hydraulic gear pump with force balance and internal cooling features

An example hydraulic system includes a hydraulic actuator; a pump driven by an electric motor and having an inlet port and an outlet port; a boost flow line configured to provide boost fluid flow or receive excess fluid flow; a reservoir fluid line fluidly coupled to a reservoir; and a valve assembly configured to operate in a plurality of states to allow the pump to operate in a closed-circuit configuration in which fluid discharged from the hydraulic actuator is provided to the inlet port of the pump or an open-circuit configuration in which fluid discharged from the hydraulic actuator is provided to the reservoir.

Dual architecture for an electro-hydraulic drive system

An example assembly comprises: a main housing; an electric motor disposed in the main housing and comprising a stator fixedly positioned in the main housing, and a rotor positioned within the stator; a hydraulic pump positioned in the main housing and at least partially within the rotor, wherein the hydraulic pump is configured to receive fluid from an inlet port and provide fluid flow to an outlet port, wherein the hydraulic pump comprises a pump shaft rotatably coupled to the rotor of the electric motor; a controller housing coupled to the main housing; and a motor controller comprising one or more circuit boards disposed within the controller housing and configured to generate electric current to drive the electric motor.

Electric motor with integrated hydraulic pump and motor controller

An example hydraulic system includes a hydraulic cylinder actuator comprising a cylinder and a piston, wherein the piston comprises a piston head and a rod extending from the piston head, wherein the piston head divides an internal space of the cylinder into a first chamber and a second chamber, and wherein the hydraulic cylinder actuator is unbalanced; a first pump driven by a first electric motor to provide fluid flow to the first chamber or the second chamber of the hydraulic cylinder actuator to drive the piston; a boost flow line; a hydraulic motor actuator; and a second pump driven by a second electric motor, wherein the second pump is fluidly coupled to the boost flow line to provide boost fluid flow to the hydraulic cylinder actuator.

Electro-hydraulic drive system for a machine

An example assembly comprises: a pump cover; a thrust plate configured to interface with the pump cover at a first side of the thrust plate and interface with gears of a gear pump at a second side of the thrust plate; and a seal disposed within a seal cavity formed at an interface between the thrust plate and the pump cover, wherein the seal defines multiple partitions at the interface between the thrust plate and the pump cover and seals each partition of the multiple partitions from other partitions.

Hydraulic gear pump with axial compensation

An example crescent seal assembly comprises: an outer crescent of a gear pump; an inner crescent of the gear pump mating with the outer crescent such that an exterior peripheral surface of the inner crescent interfaces with an interior peripheral surface of the outer crescent, forming: (i) a spring cavity, (ii) a first check valve cavity, and (iii) a second check valve cavity therebetween; a spring disposed in the at least one spring cavity; a first check pin disposed in the first check valve cavity; and a second check pin disposed in the second check valve cavity.

Hydraulic gear pump with radial pressure compensator

A swing drive system for an excavator is provided which utilizes a prime mover mechanically connected to a first hydraulic pump/motor and a second hydraulic pump/motor mechanically connected to a swing mechanism. The system includes a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor. The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers, including the swing drive.

Hydraulic hybrid swing drive system for excavators

A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.

Boom potential energy recovery of hydraulic excavator

A device, system and method for harvesting electrical power from hydraulic fluid of a hydraulic system determines at least one of hydraulic fluid flow or hydraulic fluid pressure in the hydraulic system. Based on rules and the determined at least one of the hydraulic fluid flow or hydraulic fluid pressure, an expected conversion efficiency of the power conversion device and an expected rectified power to be generated from the received input power by the power conversion device are determined. From the expected rectified power a potential conversion efficiency of the power conversion device is determined, and the power conversion device is commanded to produce the expected rectified power when the potential conversion efficiency is greater than or equal to the expected conversion efficiency. When the potential conversion efficiency is less than the expected conversion efficiency, the rules are updated.

Adaptive hybrid wireless power generation using piezoelectric element and power beaming in hydraulic systems

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Twinsburg, OH, United States of America

Hao Zhang