PISTON PUMPSCopyright Eaton Hydraulics 2000Steve Skinner, Eaton Hydraulics, Havant, UK

IntroductionProductsPISTON PUMPS

CYLINDER BLOCK AND PISTON

CYLINDER BLOCK AND PISTON

PISTON SHOE

ROTATING GROUP

PISTON PUMP PRINCIPLE

FIXED DISPLACEMENT AXIAL PISTON PUMP12

FIXED DISPLACEMENT PISTON PUMPQQ = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)

Q = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)QVARIABLE DISPLACEMENT PUMP - MAX FLOW

Q = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)QVARIABLE DISPLACEMENT PUMP - REDUCED FLOW

Q = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)STROKEQVARIABLE DISPLACEMENT PUMP - REDUCED FLOW

Q = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)QSTROKEVARIABLE DISPLACEMENT PUMP - ZERO FLOW

Q = (No. of Pistons) x (Piston Size) x (Piston Stroke) x (Drive Speed)STROKEVARIABLE DISPLACEMENT PUMP - ZERO FLOW

QVARIABLE DISPLACEMENT PUMP - REVERSED FLOW

SINGLE OPERATING PISTON

DOUBLE ACTING OPERATING PISTON

DUAL OPERATING PISTON

PERPENDICULAR OPERATING PISTON

PINTLESADDLESWASH PLATE BEARING

PISTON SHOE LUBRICATION

PISTON SHOE LUBRICATION

TYPICAL CONSTRUCTION

TYPICAL CONSTRUCTION

OPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSION

OVER CENTRE OPEN LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSION

TYPICAL CLOSED LOOP CIRCUITRY

DIRECT DISPLACEMENT CONTROL:

Manual Electric Motor Pilot pressure ElectronicDISPLACEMENT CONTROL OPTIONSCONTROLPRESSURE / DISPLACEMENT CONTROL:

Pressure Compensation Load Sensing Constant Power

MANUAL DISPLACEMENT CONTROL

ELECTRIC DISPLACEMENT CONTROL

ELECTRONIC DISPLACEMENT CONTROL

PILOT PRESSURE DISPLACEMENT CONTROL

PRESSURE COMPENSATION

LOAD SENSING

POWER LIMITING

Displacements to 750+ cm3/rPressure capabilities to 350/400 barHigh noise levelSensitive to poor inlet conditions & contaminationHigh overall efficiencyGood life expectancyLarge, bulky unitsGood fluid compatibilityHigh cost.AXIAL PISTON PUMP CHARACTERISTICS

IntroductionProductsPISTON PUMPS

210 bar

140 bar

11142133436295198cm3 / revClassic productSingle control pistonNo separate valve platePintle bearing yokeFixed displacements up to 95 cm3/rev.PVB SERIES

PVE SERIESMainly mobile applicationsSingle control pistonPintle bearing yokeThrough drive optionIntegral vane pump option.25cm3 / rev4145 CONTROLSPressure compensatorLoad sensingRemote compensatorElectric dual setting compensatorAccumulator unloading compensator

PVQ SERIES11cm3 / rev142125334145Industrial pump range comprising quietened versions of PVB & PVESingle control pistonPintle bearing yoke. CONTROLSPressure compensatorLoad sensingRemote compensatorElectric dual setting compensatorAccumulator unloading compensator185 bar

TA 19 SERIES TRANSMISSION PUMPSMedium duty hydrostatic transmission for mobile applications

Single and double units with integral charge and auxiliary pumps

Based on PVE open loop pump

Aluminium body

Typical applications include fork lift trucks and skid-steer loaders.

PVH SERIES250 bar

57cm3 / rev7498131Industrial and mobile pump range

Wide range of control options (including torque limiting)

Control piston plus bias piston

200% through drive capability

Saddle bearing yoke.

PVM SERIESPMAX 230230 barRange250280330036004000barpsiPMAX 280320350400046005000barpsiLow noise Industrial and Mobile pump seriesSingle control pistonSaddle bearing yoke200% through drive capability.280 barRange

PVM SERIES

PVX SERIES HYDROKRAFT PUMPSPMAX

420 bar

350 bar

High pressure open loop pumps for industrial applications

Wide range of control options

Saddle bearing yoke with single axial control piston.

PVW SERIES HYDROKRAFT PUMPSHigh pressure open loop pumps for industrial applications

Wide range of control options

Saddle bearing yoke with perpendicular control piston

Suitable for larger displacements and multiple units.PMAX

420 bar

350 bar

PVX & PVW SERIES OPEN LOOP PUMPS

TVW SERIES HYDROKRAFT TRANSMISSION PUMPSHigh pressure closed loop pumps for industrial applications

Wide range of control options

Saddle bearing yoke with perpendicular control piston

Integral pilot and charge pump options.PMAX

420 bar

350 bar

TVW SERIES CLOSED LOOP PUMPS

INTEGRATED MOTOR PUMP An oil-cooled electric motor and pump assembly mounted within a noise reducing shroud

INTEGRATED MOTOR PUMP An oil-cooled electric motor and pump assembly mounted within a noise reducing shroud

INTEGRATED MOTOR PUMP An oil-cooled electric motor and pump assembly mounted within a noise reducing shroud

Significant noise and space reductions

Suitable for standard single or multiple vane or piston pumps

Access port for pump control adjustments

Available in five power sizes from 15 to 92 kW.INTEGRATED MOTOR PUMP

DISPLACEMENTPRESSURECAPABILITYPISTON PUMP RANGE

PISTON PUMPSCopyright Eaton Hydraulics 2000Steve Skinner, Eaton Hydraulics, Havant, UK