PISTON PUMPS Steve Skinner Eaton Hydraulics Havant UK

PISTON PUMPS Steve Skinner, Eaton Hydraulics, Havant, UK Copyright Eaton Hydraulics 2000

PISTON PUMPS Introduction Products

CYLINDER BLOCK AND PISTON

CYLINDER BLOCK AND PISTON

PISTON SHOE

ROTATING GROUP

PISTON PUMP PRINCIPLE

FIXED DISPLACEMENT AXIAL PISTON PUMP 1 2

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

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

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

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

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

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

VARIABLE DISPLACEMENT PUMP - REVERSED FLOW Q

SINGLE OPERATING PISTON

DOUBLE ACTING OPERATING PISTON

DUAL OPERATING PISTON

PERPENDICULAR OPERATING PISTON

SWASH PLATE BEARING PINTLE SADDLE

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

DISPLACEMENT CONTROL OPTIONS DIRECT DISPLACEMENT CONTROL: u u Manual Electric Motor Pilot pressure Electronic CONTROL PRESSURE / DISPLACEMENT CONTROL: u Pressure Compensation u Load Sensing u Constant Power

MANUAL DISPLACEMENT CONTROL Q

ELECTRIC DISPLACEMENT CONTROL Q M M ~8 sec ~40 sec

ELECTRONIC DISPLACEMENT CONTROL Q U U t. MIN ~ 300 m. S - 1000 m. S

PILOT PRESSURE DISPLACEMENT CONTROL Q 10 PP PP (bar) 40

PRESSURE COMPENSATION Q P

LOAD SENSING Q P 2 P 1 P

POWER LIMITING Q P P. Q

AXIAL PISTON PUMP CHARACTERISTICS u Displacements to 750+ cm 3/r u Pressure capabilities to 350/400 bar u High noise level u Sensitive to poor inlet conditions & contamination u High overall efficiency u Good life expectancy u Large, bulky units u Good fluid compatibility u High cost.

PISTON PUMPS Introduction Products

PVB SERIES u Classic product u Single control piston u No separate valve plate u Pintle bearing yoke u Fixed displacements up to 95 cm 3/rev. 140 bar 210 bar 11 14 21 33 43 62 cm 3 / rev 95 198

PVE SERIES u Mainly mobile applications u Single control piston u Pintle bearing yoke u Through drive option u Integral vane pump option. CONTROLS 185 bar s Pressure compensator 210 bar s Load sensing s Remote compensator s Electric dual setting compensator 25 41 45 cm 3 / rev s Accumulator unloading compensator

PVQ SERIES u Industrial pump range comprising quietened versions of PVB & PVE u Single control piston u Pintle bearing yoke. 140 bar 185 bar 210 bar CONTROLS s Pressure compensator s Load sensing s Remote compensator s Electric dual setting compensator 11 14 21 25 33 41 45 cm 3 / rev s Accumulator unloading compensator

TA 19 SERIES TRANSMISSION PUMPS u Medium duty hydrostatic transmission for mobile applications u Single and double units with integral charge and auxiliary pumps 41 cm 3/rev 41 + 41 cm 3/rev bar PMAX psi 350 5000 210 3000 u Based on PVE open loop pump u Aluminium body u Typical applications include fork lift trucks and skidsteer loaders.

PVH SERIES u Industrial and mobile pump range u Wide range of control options (including torque limiting) u Control piston plus bias piston u 200% through drive capability 250 bar 57 74 98 131 cm 3 / rev u Saddle bearing yoke.

PVM SERIES bar PMAX psi 280 4000 250 230 3600 3300 230 bar Range bar u Low noise Industrial and Mobile pump series u Single control piston u Saddle bearing yoke u 200% through drive capability. PMAX psi 350 5000 320 280 4600 4000 280 bar Range

PVM SERIES - 230 bar - 280 bar 141 cm 3/r 106 81 63 50 20 18 32 28 45 57 74 98 131 cm 3/r

PVX SERIES HYDROKRAFT PUMPS u High pressure open loop pumps for industrial applications u Wide range of control options u Saddle bearing yoke with single axial control piston. PMAX 420 bar 350 bar

PVW SERIES HYDROKRAFT PUMPS u High pressure open loop pumps for industrial applications u Wide range of control options u Saddle bearing yoke with perpendicular control piston PMAX 420 bar 350 bar u Suitable for larger displacements and multiple units.

PVX & PVW SERIES OPEN LOOP PUMPS PVW PVX 66 90 130 180 250 cm 3/rev 360 500 750

TVW SERIES HYDROKRAFT TRANSMISSION PUMPS u High pressure closed loop pumps for industrial applications u Wide range of control options u Saddle bearing yoke with perpendicular control piston PMAX 420 bar 350 bar u Integral pilot and charge pump options.

TVW SERIES CLOSED LOOP PUMPS TVW 130 180 250 360 cm 3/rev 500 750

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

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

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

INTEGRATED MOTOR PUMP u Significant noise and space reductions u Suitable for standard single or multiple vane or piston pumps u Access port for pump control adjustments u Available in five power sizes from 15 to 92 k. W - 15 HP - 20 22 30 45 60 75 100 92 125

PISTON PUMP RANGE PRESSURE CAPABILITY PVX / PVW PVM PVH PVQ PVE DISPLACEMENT

PISTON PUMPS Steve Skinner, Eaton Hydraulics, Havant, UK Copyright Eaton Hydraulics 2000