Copyright Liebherr 2011
Hydraulic Pumps and Motors
Liebherr-Components AG / Gerhard Wimmer, 18.09.2013
Products Diesel engines Diesel engines up to 560 kW Diesel engines from 560 kW
Hydraulic cylinders
Large diameter bearings
Series-production cylinders
Four-point bearings
Heavy-duty cylinders
Roller bearings
Lightweight cylinders Special cylinders Shock absorbers
Gas engines
Electric machines Electric motors
Gas engines
Gearboxes
Generators
Splitter boxes
Fuel injection systems Common rail system
Planetary gearboxes −
Slewing drives
−
Swivelling drives
−
Travel and wheel drives
−
Special drives (e.g. drilling drives, cyclone drives)
Hydraulic pumps and motors Axial piston pumps Axial piston motors Servo controls Hydraulic valves
Rope winches Rope winches − Compact winches − Heavy-duty winches − Hoist gear
2
Hydraulic components 18.09.2013
© Liebherr-Components AG, 2012
Electronics Control and regulation electronics Display and operation units Power electronics
Control technology Electric drive systems Electric vehicle control systems (hybrid vehicles) Switchgear
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Liebherr-Machines Bulle
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Hydraulic components 18.09.2013
Content Open circuit pumps
Closed circuit pumps
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Motors open & closed circuit
4
Hydraulic components 18.09.2013
Content Open circuit pumps
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Closed circuit pumps Motors open & closed circuit
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Hydraulic components 28.02.2013
Comparison Rotating Groups Series A/C/D Series A/C: Max. Swash Plate Angle max.17.3°
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Series D: Max. Swash Plate Angle 22°
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Hydraulic components July 2013
Drive unit Piston Swivel yoke
Keeper ball
Keeper plate
Slide shoe Friction disc Shaft seal
Barrel
Drive shaft
Valve plate
Shaft roller bearing
Journal bearing
22 ° Swash angle
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Hydraulic components 28.02.2013
- Open circuit pumps -
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Swivel roller bearing
Types overview open circuit pumps
Swash plate angle Nominal Pressure pressure range Maximum pressure
D
C
22°
17.3°
400 bar
350 bar
450 bar
380 bar
single
parallel
back-to-back
DPVO
DPVP
DPVD
parallel
Design / Type
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Hydraulic components 28.02.2013
- Open circuit pumps -
CPVP
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Drive unit series
Single pumps
type DPVO
DPVO 108 DPVO 140 DPVO 165 DPVO 215
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Availability
9
Hydraulic components 28.02.2013
- Open circuit pumps -
Drive unit specifications Variable axial piston pump Swashplate design 9 pistons Series D
swash angle 22°
DPVO – 400 / 450 bar Displacement
108
140
165
215
215i
Vg max
cm³
107.7
140.2
167.8
216.6
216.6
at Vg max
n max
rpm
2,400
2,300
2,100
2,000
2,600
Volumetric flow
at n max
qv max
l/min
258
294
352
433
563
Drive power
∆p = 400 bar
P max
kW
172
196
235
289
375
Drive torque
∆p = 400 bar
T max
Nm
685
893
1,068
1,379
1,379 Copyright Liebherr 2011
Max. speed
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- Open circuit pumps -
type DPVP
DPVP 108
DPVP 108
DPVP 165
Engine flange SAE 2
Engine flange SAE 1
Engine flange SAE 2
2x drive units 108
2x drive units 108
2x drive units 165 with or without impeller
11 Hydraulic components 28.02.2013
- Open circuit pumps -
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Parallel pumps series D
Parallel pumps
type DPVP
One-piece housing for splitter gear box and hydraulic parallel pump
Splitter gear box: - separated gear oil - gear pump for cooling circuit of splitter gear box (only for version SAE 1)
- 2 drive units series D 108+108 or 165+165 - gear pump for supply of control hydraulic system
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- Open circuit pumps -
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Hydraulic features:
types DPVD
Common connecting plate for two drive units Only one suction port
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- Open circuit pumps -
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Tandem pumps
Rotary group Suction side of barrel Outlet impeller wheel Inlet impeller wheel
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- Open circuit pumps -
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Drive unit with charge pump in frame DPVO
Controller range: description of the abbreviations EL : Electro proportional adjustement of the displacement SD : Hydraulic proportional adjustement of the displacement DA : Pressure cut off or pressure control LS : Flowcontrol (Load Sensing) LR : Hyperbel power control SL : Cumulative power control
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LU : Electro-proportional pressure control for fan drive
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- Open circuit pumps -
Displacement control Piston Keeper plate Slide shoe Fricton disc
Connecting link Positioning piston
pHD (Area rod side)
Swivel yoke Shaft bearing
pReg (Area head side)
Drive shaft
Pressure port pHD Swivel bearing
Rotation direction
Mechanical feedback lever
Suction
Measuring piston Controller housing Valve plate
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Barrel
pHD
Pilot spool Tank pReg (regulated pressure)
- Open circuit pumps -
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Feedback piston
Modular controller design
Ports for the regulation
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- Open circuit pumps -
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Same porting layout DPVO and DPVP
Available controller for single pumps DPVO LR/LS
LR/LS with ∆P-reduction LS/DA
EL/DA or EL/LS
LR/SD/DA
LR LU
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- Open circuit pumps -
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SL/SD
Available controller for parallel pumps DPVP LR/LS
LR/LS with ∆P-reduction LS/DA
EL/DA or EL/LS
LR/SD/DA
LR LU
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- Open circuit pumps -
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SL/SD
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Controller EL/DA
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- Open circuit pumps -
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Controller EL/LS
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- Open circuit pumps -
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Controller LS/DA
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- Open circuit pumps -
The reducing valve is not included in the supply of the pump
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- Open circuit pumps -
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Controller LR
The reducing valve is not included in the supply of the pump 24 Hydraulic components 28.02.2013
- Open circuit pumps -
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Controller LR/LS
The reducing valves are not included in the supply of the pump 25 Hydraulic components 28.02.2013
- Open circuit pumps -
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Controller LR/LS with ∆P LS reduction
The control valves are not included in the supply of the pump
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- Open circuit pumps -
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Controller LR/LS with parallel pump for one-LS circuit
The control valves are not included in the supply of the pump 27 Hydraulic components 28.02.2013
- Open circuit pumps -
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Controller LR/SD/DA
The reducing valves are not included in the supply of the pump 28 Hydraulic components 28.02.2013
- Open circuit pumps -
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Controller SL/SD
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Controller LU
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- Open circuit pumps -
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Versatility
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- Open circuit pumps -
Through drive Drive shaft / flange SAE or special design on demand Trough drive for pumps up to same pump size possible Input torque is limited; calculation for the application on demand
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Example:
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- Open circuit pumps -
Application example
Working pump type DPVO
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- Open circuit pumps -
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Wheeled excavator 20 tons
Application example
Working pump DPVP without charge pump
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- Open circuit pumps -
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Crawler excavator 45 tons
Application example
Working pump DPVP without charge pump 34 Hydraulic components 28.02.2013
Working pump DPVP with charge pump - Open circuit pumps -
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Material handling machines 60 / 80 tons
Application example Mining excavator 120 tons Closed circuit slewing pump
Splitter gear box
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3x Open circuit working pumps
Open loop fan drive double pump 35 Hydraulic components 28.02.2013
- Open circuit pumps -
Content Open circuit pumps Closed circuit pumps
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Motors open & closed circuit
36 Hydraulic components 28.02.2013
Closed circuit pumps
type DPVG
DPVG 85 DPVG 108 DPVG 165
Availability Copyright Liebherr 2011
DPVG 280
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- Closed circuit pumps -
Drive units specifications Variable axial piston pump Swashplate design 9 pistons Series D
swash angle 22°
DPVG – 450 / 500 bar Displacement
85
108
165
280
Vg max
cm³
85.2
107.7
167.8
283.4
at Vg max
n max
rpm
3,300
3,000
2,700
2,500
Volumetric flow
at n max
qv max
l/min
281
323
453
709
Drive power
∆p = 430 bar
P max
kW
201
232
325
508
Drive torque
∆p = 430 bar
T max
Nm
583
737
1,149
1,940 Copyright Liebherr 2011
Max. speed
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- Closed circuit pumps -
Drive unit Piston Swivel yoke
Keeper ball
Keeper plate
Slide shoe Friction disc Shaft seal
Barrel
Drive shaft
Valve plate
Shaft roller bearing
Journal bearing
+/- 22 ° Swash angle
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- Closed circuit pumps -
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Swivel roller bearing
Adjustement system, controller, valves Electric controlled pressure reducing valves for the actuation of the controller
Controller
Mechanical feed back Adjustement piston with return springs system
Drive unit Cut off valve
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Boost pressure relief valve
Combined high pressure relief – boost valves
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- Closed circuit pumps -
Control range EL : electric proportional adjustment of the displacement
or ELS
ELS: electric proportional adjustment of the displacement with safety function
DA : pressure cut-off or pressure control
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- Closed circuit pumps -
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SD : hydraulic proportional adjustment of the displacement
Control range TCH : hydraulic control of displacement / torque limitation combined with pressure cut off; application: slewing
pump DZ : automotive drive control displacement increase with the engine speed Other regulation function on demand 42 Hydraulic components 28.02.2013
- Closed circuit pumps -
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TCE : electric control of displacement / torque limitation combined with pressure cut off ; application: slewing
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Controller: availability
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- Closed circuit pumps -
Hydraulic scheme with EL/DA controller Adjustement system
Electric proportional control (EL)
Flushing nozzle
Boost pump
Pressure cut off (DA)
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High pressure relief valves – Boost valves
- Closed circuit pumps -
Boost circuit pressure relief valve
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Boost circuit filter
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Hydraulic scheme with ELS/DA controller
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- Closed circuit pumps -
Hydraulic scheme with TC controller TCE
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TCH
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- Closed circuit pumps -
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Hydraulic scheme with DZ-DA controller
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- Closed circuit pumps -
Characteric of electric proportional controller Condition on regulation supply pressure pFA
Preferred program 48 Hydraulic components 28.02.2013
pFA min. 30 bar
On demand - Closed circuit pumps -
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pFA min. 20 bar
Integrated boost pump Available for the DPVG 108 (30 et 40 cm3); through drive: max. torque 750 Nm
DPVG 108 EL/DA with integrated boost pump and through drive SAE B
49 Hydraulic components 28.02.2013
- Closed circuit pumps -
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Other sizes on demand
Through drive Drive shaft / flange SAE or special design on demand Trough drive for pumps up to same pump size possible Input torque is limited; calculation for the application on demand
2x DPVG 108 EL/DA with integrated boost pump and through drive SAE B option on the second pump
50 Hydraulic components 28.02.2013
- Closed circuit pumps -
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Example:
Engine flange, adaptation on gear box Flange for mounting on thermic or electric motor Adaptation on Liebherr gear box with the advantage to reduce the installation length Adaptation on all other gear boxes
Flange for Diesel Special flange mounting points 51 Hydraulic components 28.02.2013
3x DPVG 108 + 1x DPVO 108 on Liebherr gear box - Closed circuit pumps -
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Examples:
Application example
4x DPVG
52 Hydraulic components 28.02.2013
- Closed circuit pumps -
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Maritim cranes
Application example Mobile cranes
3x pumps DPVG + 3x double motor DMVA for the hydrostatic travel drive 53 Hydraulic components 28.02.2013
- Closed circuit pumps -
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Power train assembly with 6 cylinder Liebherr engine
Application example Crawler tractor Per machine: 2 x DPVG
−α1 +α1 54 Hydraulic components 28.02.2013
α3
- Closed circuit pumps -
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4 x DMVA
Content Open circuit pumps Closed circuit pumps
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Motors open & closed circuit
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Overview motors Drive unit series
A
C
D
Fix motor types
FMF
-
DMFA
Variable motor types
FMV
CMVE
DMVA
14.5° - 15.5°
14.5° - 16.4°
22° Open circuit
Pressure range
Nominal pressure Maximum pressure
(1)
350 bar 380 bar
380 bar (1)
(2)
400 bar
(2)
400 bar
450 bar
(1) On request: nominal pressure 420 bar / maximum pressure 450 bar (2) For NG 370: nominal pressure 380 bar / maximum pressure 400 bar 56 Hydraulic components 28.02.2013
- Hydraulic motors -
Closed circuit (2)
450 bar
(2)
500 bar
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Swash plate angle
Fixed displacement motor Type FMF
Two-point variable motor Type FMV
Available sizes :
Available sizes:
25 / 28 / 32 / 45 / 58
64 / 75 / 90 / 100
64 / 75 / 90 / 100 / 125
125 / 140 / 165 / 250
140 / 165 / 250 Available functions: Pressure relief valve, damping valve, flush valve, resuction valve, speed sensor More details about the functionality and the availability on request. 57 Hydraulic components 28.02.2013
- Hydraulic motors -
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Motors series A
Drive unit series A & C Piston
Kipper ball
Kipper plate Slide shoe
Cylinder
Valve plate
Drive shaft Shaft seal Shaft roller bearing
Shaft roller bearing
Ca. 16° Swash angle
58 Hydraulic components 28.02.2013
- Hydraulic motors -
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Swash plate
Drive unit specifications motor series A Swash plate design 9 pistons Swash angle 14.5° (except NG 25, 28 and 58) Fix displacement motor
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Variable displacement motor
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- Hydraulic motors -
Application field for motors series A Example: Motor for fan drive with optional functions: •Anti-cavitation nonreturn valve •Pressure relief valve
Slewing of excavators Travel Copyright Liebherr 2011
Fan Drill Mill … 60 Hydraulic components 28.02.2013
- Hydraulic motors -
Motors series C
Available sizes: 85 / 108 / 135 / 165
61 Hydraulic components 28.02.2013
- Hydraulic motors -
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2-Point variable motor Type CMVE
Drive unit specifications motor series C Swash plate design 9 pistons
CMVE – 380 / 400 bar Displacement
85
108
135
165
Vg max
cm³
85.2
108
135.7
165.9
Max. speed
at Vg max ∆p = 360 bar
n max
rpm
3,900
3,470
3,250
3,000
Max. speed
at Vg min ∆p = 360 bar
n max
rpm
5,000
4,500
4,550
4,200
Volumetric flow
at n max
qv max
l/min
332
375
441
498
Output power
∆p = 360 bar
P max
kW
199
225
265
299
Output torque
∆p = 360 bar
T max
Nm
488
619
778
951
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- Hydraulic motors -
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Swash angle 14.5°-16.4°
Motor CMVE Brake valve / check valves Multidisc parking brake - automatically controlled
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Two-point displacement system
Other integrated valves: - Pressure relief valves - Flushing valve
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- Hydraulic motors -
Application field for series C motors Functions: Pressure relief valve, brake valve, flushing valve, automatic controlled parking brake Optional: Pressure control
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Travel drive for crawler machines; e.g. excavator, drill machine, …
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- Hydraulic motors -
Motors series D Fixed displacement motor type DMFA
Variable motor type DMVA
Available size:
Available sizes:
Available sizes:
370
108 / 165 / 215 / 370
165-108 / 165-165
Variable double motor type DMVA
Valves, sensors: Pressure relief valve, flushing valve, brake valve, speed sensor Control (only for DMVA): Hydraulic or electric proportional control, high pressure related control, pressure control More information about the functions and the availabilty on request. 65 Hydraulic components 28.02.2013
- Hydraulic motors -
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Available only for closed circuit; on request for open circuit
Single motor DMVA Size 165
Size 108
Size 355
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Size 215
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- Hydraulic motors -
Drive unit series D Piston Swivel yoke
Keeper ball
Keeper plate
Slide shoe Friction disc Shaft seal
Barrel
Drive shaft
Valve plate
Shaft roller bearing
Shaft roller bearing
22 ° Swash angle
67 Hydraulic components 28.02.2013
- Hydraulic motors -
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Swivel roller bearing
Drive unit specifications series D motors
DMVA – 450 / 500 bar, NG355 380 – 400 bar Displacement
108
165
215
355
Vg max
cm³
85.2
108
135.7
165.9
Max. speed
at Vg max and ∆p max
n max
rpm
3,350
3,000
2,700
2,400
Max. speed
at Vg / Vg min = 0,65 and ∆p = 430 bar
n max
rpm
5,125
4,590
4,100
3,670
Volumetric flow
at n max
qv max
l/min
361
503
584
853
Output power
∆p = 430 bar NG355 with ∆p = 360 bar
P max
kW
259
361
419
512
Output torque
∆p = 430 bar NG355 with ∆p = 360 bar
T max
Nm
737
1,149
1,481
2,151
68 Hydraulic components 28.02.2013
- Hydraulic motors -
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Swash plate design 9 pistons Swash angle: NG 85 up to 280 : 22° NG 370 : 20.8°
Application field for series D motors Example: Motor for hydrostatic travel drive in closed circuit: •Electric proportional control •Flushing valve
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Travel Slewing Winch* Drill Mill … * available only for NG165; other sizes on demand 69 Hydraulic components 28.02.2013
- Hydraulic motors -
Motors: permissible speed related to the displacement Maximum speed n
n0 Series A+C
Series D
Pmax 200 bar Short-term 400 bar Ratio n / n0
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- Hydraulic motors -
Pmax 200 bar Short-term 450 bar
NG
Ratio Vg / Vgmax
NG
Series A+C
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n0 Series D
Content Open circuit pumps Closed circuit pumps Motors
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Product advantages
71 Hydraulic components 28.02.2013
Rounded surfaces « pot shaped » design 72 Hydraulic components 28.02.2013
Internal ribbing for reinforcement of housing walls
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Reduction of noise emission
Product advantages Versatility: mounting flanges, though drive, controllers, options Broad controller range with outstanding behavior (accurate characteristic, low hysteresis, high dynamic) Broad valve range (Relief valves, resuction, flushing, brake valve, …) Integration of functions costs
compact design and reduced manufacturing
Drive unit series D with swash plate angle 22° High efficiency over a large conversion range Good starting behavior of the motors Low noise emissions thanks to state-of-the-art port plate design and optimized housing parts Robustness and reliability using the experience in the development of components working in tough conditions Development of specific solutions according the customer specifications 73 Hydraulic components 28.02.2013
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Very stable behavior of the pressure relief valves
Application example for motor DMFA
10x DMFA 355 for slewing and travel
74 Hydraulic components 28.02.2013
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Mining excavator 800 tons
Application example for motor series D Reachstaker
−α1 +α1 75 Hydraulic components 28.02.2013
α2
α3
α2
α3
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Two double motor per Gerät
Application example for motor series D
Double motor DMVA 165 mit special drive unit for winch
76 Hydraulic components 28.02.2013
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Maritim crane
Application example for motor series D Drilling machine
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2x Double motor DMVA 165-165 for the drive of drill device
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Application example for motor series D
4 x DMVA 165
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Crawler crane
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Application
79 Hydraulic components 28.02.2013
Thank you for your attention
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www.liebherr.com
80 Hydraulic components 28.02.2013