PISTON PUMPSPISTON PUMPS

Copyright © Eaton Hydraulics 2000Copyright © Eaton Hydraulics 2000Steve Skinner, Eaton Hydraulics, Havant, UKSteve Skinner, Eaton Hydraulics, Havant, UK

IntroductionIntroduction

ProductsProducts

PISTON PUMPSPISTON PUMPS

CYLINDER BLOCK AND PISTONCYLINDER BLOCK AND PISTON

CYLINDER BLOCK AND PISTONCYLINDER BLOCK AND PISTON

PISTON SHOEPISTON SHOE

ROTATING GROUPROTATING GROUP

PISTON PUMP PRINCIPLEPISTON PUMP PRINCIPLE

FIXED DISPLACEMENT AXIAL PISTON PUMPFIXED DISPLACEMENT AXIAL PISTON PUMP

1

2

FIXED DISPLACEMENT PISTON PUMPFIXED DISPLACEMENT PISTON PUMP

QQ

Q = (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)

Q = (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)

QQ

STROKESTROKE

VARIABLE DISPLACEMENT PUMP - MAX FLOWVARIABLE DISPLACEMENT PUMP - MAX FLOW

Q = (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)

STROKESTROKE

QQ

VARIABLE DISPLACEMENT PUMP - REDUCED FLOWVARIABLE DISPLACEMENT PUMP - REDUCED FLOW

Q = (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)

STROKESTROKE

QQ

VARIABLE DISPLACEMENT PUMP - REDUCED FLOWVARIABLE DISPLACEMENT PUMP - REDUCED FLOW

Q = (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)

QQ

STROKESTROKE

VARIABLE DISPLACEMENT PUMP - ZERO FLOWVARIABLE DISPLACEMENT PUMP - ZERO FLOW

Q = (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)

STROKESTROKE

VARIABLE DISPLACEMENT PUMP - ZERO FLOWVARIABLE DISPLACEMENT PUMP - ZERO FLOW

QQ

VARIABLE DISPLACEMENT PUMP - REVERSED FLOWVARIABLE DISPLACEMENT PUMP - REVERSED FLOW

SINGLE OPERATING PISTONSINGLE OPERATING PISTON

DOUBLE ACTING OPERATING PISTONDOUBLE ACTING OPERATING PISTON

DUAL OPERATING PISTONDUAL OPERATING PISTON

PERPENDICULAR OPERATING PISTONPERPENDICULAR OPERATING PISTON

PINTLEPINTLE

SADDLESADDLE

SWASH PLATE BEARINGSWASH PLATE BEARING

PISTON SHOE LUBRICATIONPISTON SHOE LUBRICATION

PISTON SHOE LUBRICATIONPISTON SHOE LUBRICATION

TYPICAL CONSTRUCTIONTYPICAL CONSTRUCTION

TYPICAL CONSTRUCTIONTYPICAL CONSTRUCTION

OPEN LOOP TRANSMISSIONOPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSIONOPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSIONOPEN LOOP TRANSMISSION

OPEN LOOP TRANSMISSIONOPEN LOOP TRANSMISSION

OVER CENTRE OPEN LOOP TRANSMISSIONOVER CENTRE OPEN LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

CLOSED LOOP TRANSMISSIONCLOSED LOOP TRANSMISSION

TYPICAL CLOSED LOOP CIRCUITRYTYPICAL CLOSED LOOP CIRCUITRY

DIRECT DISPLACEMENT CONTROL:

ManualElectric MotorPilot pressureElectronic

DIRECT DISPLACEMENT CONTROL:

ManualElectric MotorPilot pressureElectronic

DISPLACEMENT CONTROL OPTIONSDISPLACEMENT CONTROL OPTIONS

CONTROL PRESSURE / DISPLACEMENT CONTROL:

Pressure CompensationLoad SensingConstant Power

PRESSURE / DISPLACEMENT CONTROL:

Pressure CompensationLoad SensingConstant Power

Q

MANUAL DISPLACEMENT CONTROLMANUAL DISPLACEMENT CONTROL

ELECTRIC DISPLACEMENT CONTROLELECTRIC DISPLACEMENT CONTROL

M

Q

~8 sec ~40 secM

ELECTRONIC DISPLACEMENT CONTROLELECTRONIC DISPLACEMENT CONTROL

UU

Q

U

tMIN ~ 300 mS - 1000 mS

PILOT PRESSURE DISPLACEMENT CONTROLPILOT PRESSURE DISPLACEMENT CONTROL

PP

Q

PP (bar)10 40

PRESSURE COMPENSATIONPRESSURE COMPENSATION

Q

P

LOAD SENSINGLOAD SENSING

P2

P1

Q

PP1P2

POWER LIMITINGPOWER LIMITING

Q

P

P.Q

Displacements to 750+ cm3/r

Pressure capabilities to 350/400 bar

High noise level

Sensitive to poor inlet conditions & contamination

High overall efficiency

Good life expectancy

Large, bulky units

Good fluid compatibility

High cost.

Displacements to 750+ cm3/r

Pressure capabilities to 350/400 bar

High noise level

Sensitive to poor inlet conditions & contamination

High overall efficiency

Good life expectancy

Large, bulky units

Good fluid compatibility

High cost.

AXIAL PISTON PUMP CHARACTERISTICSAXIAL PISTON PUMP CHARACTERISTICS

IntroductionIntroduction

ProductsProducts

PISTON PUMPSPISTON PUMPS

210 bar210 bar

140 bar140 bar

1111 1414 2121 3333 4343 6262 9595 198198cm3 / revcm3 / rev

Classic product

Single control piston

No separate valve plate

Pintle bearing yoke

Fixed displacements up to 95 cm3/rev.

Classic product

Single control piston

No separate valve plate

Pintle bearing yoke

Fixed displacements up to 95 cm3/rev.

PVB SERIESPVB SERIES

PVE SERIESPVE SERIES

Mainly mobile applications

Single control piston

Pintle bearing yoke

Through drive option

Integral vane pump option.

Mainly mobile applications

Single control piston

Pintle bearing yoke

Through drive option

Integral vane pump option.

2525

210 bar210 bar

185 bar185 bar

cm3 / revcm3 / rev4141 4545

CONTROLS

Pressure compensator

Load sensing

Remote compensator

Electric dual setting compensator

Accumulator unloading compensator

CONTROLS

Pressure compensator

Load sensing

Remote compensator

Electric dual setting compensator

Accumulator unloading compensator

PVQ SERIESPVQ SERIES

210 bar210 bar

140 bar140 bar

1111cm3 / revcm3 / rev

1414 2121 2525 3333 4141 4545

Industrial pump range comprising quietened versions of PVB & PVE

Single control piston

Pintle bearing yoke.

Industrial pump range comprising quietened versions of PVB & PVE

Single control piston

Pintle bearing yoke.

CONTROLS

Pressure compensator

Load sensing

Remote compensator

Electric dual setting compensator

Accumulator unloading compensator

CONTROLS

Pressure compensator

Load sensing

Remote compensator

Electric dual setting compensator

Accumulator unloading compensator

185 bar185 bar

TA 19 SERIES TRANSMISSION PUMPSTA 19 SERIES TRANSMISSION PUMPS

PMAX PMAX

210210

350350

barbar psipsi

30003000

50005000

41 cm3/rev41 cm3/rev

41 + 41 cm3/rev41 + 41 cm3/rev

Medium 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.

Medium 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 SERIESPVH SERIES

250 bar250 bar5757

cm3 / revcm3 / rev7474 9898 131131

Industrial and mobile pump range

Wide range of control options (including torque limiting)

Control piston plus bias piston

200% through drive capability

Saddle bearing yoke.

Industrial 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 SERIESPVM SERIES

PMAX PMAX

230230230 barRange

250250280280

330033003600360040004000

barbar psipsi

PMAX PMAX

280280320320350350

400040004600460050005000

barbar psipsi

280 barRange

Low noise Industrial and Mobile pump series

Single control piston

Saddle bearing yoke

200% through drive capability.

Low noise Industrial and Mobile pump series

Single control piston

Saddle bearing yoke

200% through drive capability.

PVM SERIESPVM SERIES

20203232

50506363

8181

106106

141 cm3/r141 cm3/r

18 28 45 57 74 98 131 cm3/r 18 28 45 57 74 98 131 cm3/r

- 230 bar- 230 bar

- 280 bar- 280 bar

PVX SERIES HYDROKRAFT PUMPSPVX SERIES HYDROKRAFT PUMPS

PMAX PMAX 420 bar420 bar

350 bar350 bar

High pressure open loop pumps for industrial applications

Wide range of control options

Saddle bearing yoke with single axial control piston.

High pressure open loop pumps for industrial applications

Wide range of control options

Saddle bearing yoke with single axial control piston.

PVW SERIES HYDROKRAFT PUMPSPVW SERIES HYDROKRAFT PUMPS

High 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.

High 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 PMAX 420 bar420 bar

350 bar350 bar

cm3/revcm3/rev250250 360360 500500 7507506666 9090 130130 180180

PVXPVX

PVWPVW

PVX & PVW SERIES OPEN LOOP PUMPSPVX & PVW SERIES OPEN LOOP PUMPS

TVW SERIES HYDROKRAFT TRANSMISSION PUMPSTVW SERIES HYDROKRAFT TRANSMISSION PUMPS

High 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.

High 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 PMAX 420 bar420 bar

350 bar350 bar

cm3/revcm3/rev

130130 180180 250250 360360 500500 750750

TVWTVW

TVW SERIES CLOSED LOOP PUMPSTVW SERIES CLOSED LOOP PUMPS

INTEGRATED MOTOR PUMPINTEGRATED MOTOR PUMP

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

INTEGRATED MOTOR PUMPINTEGRATED MOTOR PUMP

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

INTEGRATED MOTOR PUMPINTEGRATED 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.

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.

kW - 15 22 45 75 92kW - 15 22 45 75 92HP - 20 30 60 100 125HP - 20 30 60 100 125

INTEGRATED MOTOR PUMPINTEGRATED MOTOR PUMP

PVX / PVWPVX / PVWPVM

PVHPVQ

PVE

DISPLACEMENTDISPLACEMENT

PRESSURECAPABILITYPRESSURECAPABILITY

PISTON PUMP RANGEPISTON PUMP RANGE

PISTON PUMPSPISTON PUMPS

Copyright © Eaton Hydraulics 2000Copyright © Eaton Hydraulics 2000Steve Skinner, Eaton Hydraulics, Havant, UKSteve Skinner, Eaton Hydraulics, Havant, UK