Table Of Contents - Danfoss LPV Technical Information

Technical Information
LPV Axial Piston Pumps
Contents
General description
Operating parameters
System design parameters
Operation
Technical specifications
Product coding
Features and options
Installation drawings
© Danfoss | September 2017
Overview..............................................................................................................................................................................................4
Design...................................................................................................................................................................................................4
Typical applications......................................................................................................................................................................... 4
LPV product specifications............................................................................................................................................................4
Design...................................................................................................................................................................................................6
Direct displacement drive system.............................................................................................................................................. 7
LPV Pump schematic diagram.....................................................................................................................................................7
Overview..............................................................................................................................................................................................8
Input speed.........................................................................................................................................................................................8
System pressure................................................................................................................................................................................8
Pressure Ratings................................................................................................................................................................................8
Viscosity............................................................................................................................................................................................... 8
Temperature.......................................................................................................................................................................................9
Case pressure..................................................................................................................................................................................... 9
Independent braking system.......................................................................................................................................................9
Reservoir.............................................................................................................................................................................................. 9
Case drain......................................................................................................................................................................................... 10
Charge flow requirements..........................................................................................................................................................10
Loop flushing...................................................................................................................................................................................10
Bearing loads and life................................................................................................................................................................... 10
Applications with external shaft loads..............................................................................................................................10
Hydraulic unit life........................................................................................................................................................................... 12
Mounting flange loads.................................................................................................................................................................12
Estimating overhung load moments.................................................................................................................................12
Input shaft torque rating and spline lubrication................................................................................................................ 13
Understanding and minimizing system noise.....................................................................................................................13
Sizing equations............................................................................................................................................................................. 14
Fluids.................................................................................................................................................................................................. 14
Filtration system............................................................................................................................................................................. 15
Charge filtration........................................................................................................................................................................ 16
Suction filtration....................................................................................................................................................................... 16
HPRV (High pressure relief valve).............................................................................................................................................17
Bypass function...............................................................................................................................................................................17
CPRV (Charge pressure relief valve)........................................................................................................................................ 17
Loop flushing valve....................................................................................................................................................................... 18
Neutral return mechanism..........................................................................................................................................................18
Specifications...................................................................................................................................................................................20
LPV Model Code............................................................................................................................................................................. 23
Controls............................................................................................................................................................................................. 26
Direct displacement control................................................................................................................................................. 26
Features and benefits..............................................................................................................................................................26
Control handle requirements...............................................................................................................................................26
Input shafts.......................................................................................................................................................................................27
Auxiliary mounting pads............................................................................................................................................................. 28
SAE-A Auxiliary mounting..................................................................................................................................................... 28
LPV Installation drawings............................................................................................................................................................30
LPV Schematic.................................................................................................................................................................................31
520L0954 | BC00000044en-US0102 | 3