Eaton Hydraulics 2000 Steve Skinner, Eaton Hydraulics, Havant, Uk
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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:
Manual Electric Motor Pilot pressure Electronic
CONTROL
PRESSURE / DISPLACEMENT CONTROL: Pressure Compensation Load Sensing Constant Power
MANUAL DISPLACEMENT CONTROL
Q
ELECTRIC DISPLACEMENT CONTROL
Q
M M
~8 sec
~40 sec
ELECTRONIC DISPLACEMENT CONTROL
Q
U U
tMIN ~ 300 mS - 1000 mS
PILOT PRESSURE DISPLACEMENT CONTROL
Q
10 PP
PP (bar)
40
PRESSURE COMPENSATION
Q
P
LOAD SENSING
Q
P2 P1
P2 P1
P
POWER LIMITING
Q
P P.Q
AXIAL PISTON PUMP CHARACTERISTICS 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.
PISTON PUMPS
Introduction Products
PVB SERIES Classic product Single control piston No separate valve plate Pintle bearing yoke Fixed displacements up to 95 cm3/rev.
140 bar 210 bar
11
14
21
33 43 62 cm3 / rev
95
198
PVE SERIES Mainly mobile applications Single control piston Pintle bearing yoke Through drive option Integral vane pump option. CONTROLS
185 bar
Pressure compensator
210 bar
Load sensing Remote compensator Electric dual setting compensator
25
41 45 cm3 / rev
Accumulator unloading compensator
PVQ SERIES Industrial pump range comprising quietened versions of PVB & PVE Single control piston Pintle bearing yoke.
140 bar 185 bar 210 bar
CONTROLS Pressure compensator Load sensing Remote compensator Electric dual setting compensator
11 14 21 25 33 41 45 cm3 / rev
Accumulator unloading compensator
TA 19 SERIES TRANSMISSION PUMPS Medium duty hydrostatic transmission for mobile applications Single and double units with integral charge and auxiliary pumps 41 cm3/rev 41 + 41 cm3/rev bar
PMAX
psi
350
5000
210
3000
Based on PVE open loop pump Aluminium body Typical applications include fork lift trucks and skidsteer loaders.
PVH SERIES Industrial and mobile pump range
Wide range of control options (including torque limiting)
Control piston plus bias piston
200% through drive capability 250 bar
57
74 98 131 cm3 / rev
Saddle bearing yoke.
PVM SERIES
bar 280
PMAX
250 230
psi 4000 3600 3300
230 bar Range
bar
Low noise Industrial and Mobile pump series Single control piston Saddle bearing yoke 200% through drive capability.
350
PMAX
320 280
psi 5000 4600 4000
280 bar Range
PVM SERIES - 230 bar - 280 bar
141 cm3/r 106 81 50 20
18
63
32
28
45
57
74
98
131 cm3/r
PVX SERIES HYDROKRAFT PUMPS High pressure open loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with single axial control piston.
PMAX
420 bar 350 bar
PVW SERIES HYDROKRAFT PUMPS High pressure open loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with perpendicular control piston
PMAX
420 bar 350 bar
Suitable for larger displacements and multiple units.
PVX & PVW SERIES OPEN LOOP PUMPS
PVW
PVX
66
90
130
180
250
cm3/rev
360
500
750
TVW SERIES HYDROKRAFT TRANSMISSION PUMPS High pressure closed loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with perpendicular control piston
PMAX
420 bar 350 bar
Integral pilot and charge pump options.
TVW SERIES CLOSED LOOP PUMPS
TVW
130
180
250
360
cm3/rev
500
750
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
INTEGRATED MOTOR PUMP 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 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
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:
Manual Electric Motor Pilot pressure Electronic
CONTROL
PRESSURE / DISPLACEMENT CONTROL: Pressure Compensation Load Sensing Constant Power
MANUAL DISPLACEMENT CONTROL
Q
ELECTRIC DISPLACEMENT CONTROL
Q
M M
~8 sec
~40 sec
ELECTRONIC DISPLACEMENT CONTROL
Q
U U
tMIN ~ 300 mS - 1000 mS
PILOT PRESSURE DISPLACEMENT CONTROL
Q
10 PP
PP (bar)
40
PRESSURE COMPENSATION
Q
P
LOAD SENSING
Q
P2 P1
P2 P1
P
POWER LIMITING
Q
P P.Q
AXIAL PISTON PUMP CHARACTERISTICS 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.
PISTON PUMPS
Introduction Products
PVB SERIES Classic product Single control piston No separate valve plate Pintle bearing yoke Fixed displacements up to 95 cm3/rev.
140 bar 210 bar
11
14
21
33 43 62 cm3 / rev
95
198
PVE SERIES Mainly mobile applications Single control piston Pintle bearing yoke Through drive option Integral vane pump option. CONTROLS
185 bar
Pressure compensator
210 bar
Load sensing Remote compensator Electric dual setting compensator
25
41 45 cm3 / rev
Accumulator unloading compensator
PVQ SERIES Industrial pump range comprising quietened versions of PVB & PVE Single control piston Pintle bearing yoke.
140 bar 185 bar 210 bar
CONTROLS Pressure compensator Load sensing Remote compensator Electric dual setting compensator
11 14 21 25 33 41 45 cm3 / rev
Accumulator unloading compensator
TA 19 SERIES TRANSMISSION PUMPS Medium duty hydrostatic transmission for mobile applications Single and double units with integral charge and auxiliary pumps 41 cm3/rev 41 + 41 cm3/rev bar
PMAX
psi
350
5000
210
3000
Based on PVE open loop pump Aluminium body Typical applications include fork lift trucks and skidsteer loaders.
PVH SERIES Industrial and mobile pump range
Wide range of control options (including torque limiting)
Control piston plus bias piston
200% through drive capability 250 bar
57
74 98 131 cm3 / rev
Saddle bearing yoke.
PVM SERIES
bar 280
PMAX
250 230
psi 4000 3600 3300
230 bar Range
bar
Low noise Industrial and Mobile pump series Single control piston Saddle bearing yoke 200% through drive capability.
350
PMAX
320 280
psi 5000 4600 4000
280 bar Range
PVM SERIES - 230 bar - 280 bar
141 cm3/r 106 81 50 20
18
63
32
28
45
57
74
98
131 cm3/r
PVX SERIES HYDROKRAFT PUMPS High pressure open loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with single axial control piston.
PMAX
420 bar 350 bar
PVW SERIES HYDROKRAFT PUMPS High pressure open loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with perpendicular control piston
PMAX
420 bar 350 bar
Suitable for larger displacements and multiple units.
PVX & PVW SERIES OPEN LOOP PUMPS
PVW
PVX
66
90
130
180
250
cm3/rev
360
500
750
TVW SERIES HYDROKRAFT TRANSMISSION PUMPS High pressure closed loop pumps for industrial applications
Wide range of control options
Saddle bearing yoke with perpendicular control piston
PMAX
420 bar 350 bar
Integral pilot and charge pump options.
TVW SERIES CLOSED LOOP PUMPS
TVW
130
180
250
360
cm3/rev
500
750
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
INTEGRATED MOTOR PUMP 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 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
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