LIEBHERR Pumps and Motors

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


Liebherr-Machines Bulle

3


Content Open circuit pumps

Closed circuit pumps


Motors open & closed circuit

4


Content Open circuit pumps


Closed circuit pumps Motors open & closed circuit

5


Comparison Rotating Groups Series A/C/D Series A/C: Max. Swash Plate Angle max.17.3°


Series D: Max. Swash Plate Angle 22°

6

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

7


- Open circuit pumps -


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

8



CPVP


Drive unit series

Single pumps

type DPVO

DPVO 108 DPVO 140 DPVO 165 DPVO 215


Availability

9



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

10 Hydraulic components 28.02.2013


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




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




Hydraulic features:

types DPVD

Common connecting plate for two drive units Only one suction port




Tandem pumps

Rotary group Suction side of barrel Outlet impeller wheel Inlet impeller wheel




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


LU : Electro-proportional pressure control for fan drive



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


Barrel

pHD

Pilot spool Tank pReg (regulated pressure)



Feedback piston

Modular controller design

Ports for the regulation




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




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




SL/SD


Controller EL/DA




Controller EL/LS




Controller LS/DA



The reducing valve is not included in the supply of the pump




Controller LR

The reducing valve is not included in the supply of the pump 24 Hydraulic components 28.02.2013



Controller LR/LS

The reducing valves are not included in the supply of the pump 25 Hydraulic components 28.02.2013



Controller LR/LS with ∆P LS reduction

The control valves are not included in the supply of the pump




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



Controller LR/SD/DA

The reducing valves are not included in the supply of the pump 28 Hydraulic components 28.02.2013



Controller SL/SD


Controller LU




Versatility



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


Example:



Application example

Working pump type DPVO




Wheeled excavator 20 tons

Application example

Working pump DPVP without charge pump




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 -


Material handling machines 60 / 80 tons

Application example Mining excavator 120 tons Closed circuit slewing pump

Splitter gear box


3x Open circuit working pumps

Open loop fan drive double pump 35 Hydraulic components 28.02.2013


Content Open circuit pumps Closed circuit pumps




Closed circuit pumps

type DPVG

DPVG 85 DPVG 108 DPVG 165

Availability Copyright Liebherr 2011

DPVG 280


- 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



Drive unit Piston Swivel yoke

Keeper ball

Keeper plate


Barrel

Drive shaft

Valve plate


Journal bearing

+/- 22 ° Swash angle





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


Boost pressure relief valve

Combined high pressure relief – boost valves



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




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



TCE : electric control of displacement / torque limitation combined with pressure cut off ; application: slewing


Controller: availability



Hydraulic scheme with EL/DA controller Adjustement system

Electric proportional control (EL)

Flushing nozzle

Boost pump

Pressure cut off (DA)


High pressure relief valves – Boost valves


Boost circuit pressure relief valve


Boost circuit filter


Hydraulic scheme with ELS/DA controller



Hydraulic scheme with TC controller TCE


TCH




Hydraulic scheme with DZ-DA controller



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 -


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




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




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 -


Examples:

Application example

4x DPVG




Maritim cranes

Application example Mobile cranes

3x pumps DPVG + 3x double motor DMVA for the hydrostatic travel drive 53 Hydraulic components 28.02.2013



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



4 x DMVA

Content Open circuit pumps Closed circuit pumps




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


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



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


Ca. 16° Swash angle




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


Variable displacement motor



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


Motors series C

Available sizes: 85 / 108 / 135 / 165




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




Swash angle 14.5°-16.4°

Motor CMVE Brake valve / check valves Multidisc parking brake - automatically controlled


Two-point displacement system

Other integrated valves: - Pressure relief valves - Flushing valve



Application field for series C motors Functions: Pressure relief valve, brake valve, flushing valve, automatic controlled parking brake Optional: Pressure control


Travel drive for crawler machines; e.g. excavator, drill machine, …



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



Available only for closed circuit; on request for open circuit

Single motor DMVA Size 165

Size 108

Size 355


Size 215



Drive unit series D Piston Swivel yoke

Keeper ball

Keeper plate


Barrel

Drive shaft

Valve plate



22 ° Swash angle





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




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


Travel Slewing Winch* Drill Mill … * available only for NG165; other sizes on demand 69 Hydraulic components 28.02.2013


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



Pmax 200 bar Short-term 450 bar

NG

Ratio Vg / Vgmax

NG

Series A+C


n0 Series D

Content Open circuit pumps Closed circuit pumps Motors


Product advantages


Rounded surfaces « pot shaped » design 72 Hydraulic components 28.02.2013

Internal ribbing for reinforcement of housing walls


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


Very stable behavior of the pressure relief valves

Application example for motor DMFA

10x DMFA 355 for slewing and travel



Mining excavator 800 tons

Application example for motor series D Reachstaker

−α1 +α1 75 Hydraulic components 28.02.2013

α2

α3

α2

α3


Two double motor per Gerät

Application example for motor series D

Double motor DMVA 165 mit special drive unit for winch



Maritim crane

Application example for motor series D Drilling machine


2x Double motor DMVA 165-165 for the drive of drill device


Application example for motor series D

4 x DMVA 165



Crawler crane


Application


Thank you for your attention


www.liebherr.com


LIEBHERR Pumps and Motors

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