Axial Piston Pumps for Commercial Vehicles from Bosch Rexroth Geert Geven(DCBN/SLM) 1
Overview - Truck pump A17/A18 Model A17FO (KFA) A17FNO A17VO (KVA) A18VO A18VLO Design fix displacement middle pressure Size 23, 32, 45, 63, 80, 107 Speed (min -1 ) Pressure (bar) Weight (kg) Data Sheet fix displacement low pressure 2000-3050 1750 300 / 350 New! 350 /400 variable displacement middle pressure variable displacement high pressure variable displacement high pressure (long-life) 125 55, 80, 107 55, 80, 107 80 2500, 2240, 2150 2500, 2240, 2150 2240 250 / 300 300 / 350 350 / 400 350 / 400 5,9 15 15 16, 21, 25 16, 21, 25 24,4 RE 91520 RE 91510 RE 92260 RE 92270 RE 92280 2
Axial Piston Pumps for Commercial Vehicles from Bosch Rexroth Working Principal Bent Axis versus Swash Plate bent axis swash plate no relative movement V = 0 robust towards contamination high relative movement V = 40 km/h (A4VG125, 2200 min -1 ) sensitive to contamination 3
Axial Piston Pumps for Commercial Vehicles from Bosch Rexroth Swashplate Through drive possibility Swashplate 9 piston: => lower pulsation => lower noise level No through drive 7 piston Bent axis Bent axis Suction port separated from leakage => transport of heated oil to reservoir Filtration requirement 10 20 μ Hydrostatic force-compensation => lower friction Axial forces are taken up in the housing => higher lifetime Torque transmission on cylinder => cross forces on piston Not sensitive against rotating-oscillation Nearly identical efficiency Lower speeds in standard version Common or separated suction and leakage port Filtration requirement 40 μ No hydrostatic force-compensation Axial forces taken up by roller bearings => lower lifetime Torque transmission on rotary flange => no cross forces on piston Sensitive against rotating-oscillation Nearly identical efficiency Higher speeds Small swivel angle (15 ) Large swivel angle (VO = 26,5, FO = 40 ) Easy change of flow direction Very low swivel time (lower masses) => high dynamic Change of flow direction requires big space Large swivel time, (high masses): =>low dynamic 4
Axial piston unit A17FO/VO Basics: Bent axis design 5
Overview - Truck pump A17/A18 6
Axial piston unit A17VO. VO Basics: Bent Axis Design Self centering rotary group Spherical Cylinder One piece conical piston Tapered roller bearing Automatical bearing lubrication Hydrostatical relief 7
Overview - Truck pump A17/A18 8
Axial piston unit A17VO. VO Basics: hydrostatic Relief 9
Axial piston unit A17VO. VO Parts: Control lense, Piston with pistonrings 10
Overview - Truck pump A17/A18 A17FO ISO 7653 Mounting flange DIN ISO 14 Drive shaft 11
Overview - Truck pump A17/A18 12
Overview - Truck pump A17/A18 13
Overview - Truck pump A17/A18 14
Overview - Truck pump A17/A18 15
Overview - Truck pump A17/A18 16
Overview - Truck pump A17/A18 A17FO Features/application Compact design for use in commercial vehicles High power density with small dimensions Direction can easily be changed Good self-suction characteristics Low noise level A17FO Series 10 Sizes 23, 32, 45, 63, 80, 107 Data sheet RE 91520 2D + 3D-Model Nominal pressure 300 bar 350 bar Maximum pressure 350 bar 400 bar 17
Overview - Truck pump A17/A18 A17FNO Features/application Compact design for use in commercial vehicles High power density with small dimensions Direction can easily be changed Good self-suction characteristics Low noise level A17FON Series 10 Sizes 125 Data sheet RE 91510 2D + 3D-Model Nominal pressure Maximum pressure 250 bar 300 bar 18
Overview - Truck pump A17/A18 A17FO / A17FNO Applications, Example Dumper Open Centre A17FO 19
Overview - Truck pump A17/A18 A17FO / A17FNO Simply change of rotational direction Pressure stud Tan k Pressure Pressure side side Tan k Standard Design counter-clockwise rotation Power-take-off clockwise rotation Pressure stud Conversion to clockwise rotation Power-take-off counter-clockwise rotation 20
Axial piston unit A17VO. VO Truck pump: Weight optimized pump housing ( Aluminium alloy) Splined shaft ( DIN ISO 14-LKW) PTO Special flange ( ISO7653-1985-LKW) 124mm ( 107cc) 117mm ( 80cc) 110mm ( 55cc) 21
Axial piston unit A17VO. VO Type code Data RE 92260 /01.11 22
Axial piston unit A17VO. VO Parts 1 Drive shaft 2 Pump housing 3 Piston 4 Cylinder 5 Controller 6 Control lense 7 Port plate 8 Control piston 23
Axial piston unit A17VO. VO Basic function: hydraulic displacement Area ratio: 2:1 Systempressure Control valve 24
Axial piston unit A17VO. VO Basic function: displacement control 25
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 26
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 27
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 28
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 29
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 30
Axial piston unit A17VO. VO Basic function: LS with pressure controller Pressure controller Flow controller 31
Axial piston unit A17VO. VO Basic function: LS with pressure controller 32
Axial piston unit A17VO. VO Basic function: LS with pressure controller 33
Axial piston unit A17VO. VO Basic function: LS with pressure controller 34
Axial piston unit A17VO. VO Basic function: EP controller 35
Axial piston unit A17VO. VO Basic function: EP2 controller 36
Axial piston unit A17VO. VO Basic function: EP6 controller 37
Axial piston unit A17VO. VO Basic function: EP6 controller 38
Overview - Truck pump A17/A18 A17VO Features Variable pump for commercial vehicles Mounting on power take-off Compact design Low mass torque High self-suction capability Application Truck-mounted loader cranes A17VO Series 11 Sizes 55, 80, 107 Controllers DRS, EP2, EP6 Data sheet RE 92260 2D + 3D-Model Nominal pressure Maximum pressure 300 bar 350 bar 39
Overview - Truck pump A17/A18 A18VO Features Mounting on power take-off Designed for high pressure (A17VO pressure increased by 50 bar) Controller: DRS, EP (new ED/ mid.2015) Application Truck loader cranes and bodies Variable pump for Commercial vehicles A17VO Series 11 Sizes 55, 80, 107 Controllers DRS, EP2, EP6 Data sheet RE 92270 2D + 3D-Model Nominal pressure Maximum pressure 350 bar 400 bar 40
Overview - Truck pump A17/A18 A18VLO Features Variable pump for commercial vehicles Mounting on power take-off Designed for high requirements Proven design features of the A17VO and A18VO Application Concrete mixer A17VO Series 11 Sizes 80 Controllers DRS Data sheet RE 92280 2D + 3D-Model Nominal pressure Maximum pressure 350 bar 400 bar 41
Overview - Truck pump A17/A18 A17VO / A18VO Applications, Example Knuckle boom crane Closed Centre A18VO 42
Overview - Truck pump A17/A18 Load-Sensing System - Advantage Throttle control with fixed displacement pump Load-sensing-control with variable deplacement pump Power loss Effective capacity Load Power loss Effective capacity Load 43
Overview - Truck pump A17/A18 Load-Sensing System flushing line tank line max min Suction line water trap Pressure line Load sensing line 44
Overview - Truck pump A17/A18 Load-Sensing System Principle Circuit Diagram LS-control block measuring and control points pump A17VO107DRS 45
Overview - Truck pump A17/A18 Load-Sensing Control-System - radio controlled 3rd boom out trigger 2nd boom main boom slewing grabber winch Tipper valve with pressure cut-off LS-valve variable pump A17VO 46
Overview - Truck pump A17/A18 Thank you for your attention 47