Axial Piston Variable Pump A18VO Series 11 - Interempresas

1 RE 92270 , Bosch Rexroth AGFeatures Variable pump with Axial tapered Piston rotary group of bent-axis design with special characteristics and dimen-sions for use in commercial vehicles. The flow is proportional to the drive speed and displace-ment. The flow can be infinitely varied by adjusting the bent-axis angle. Favorable power-to-weight ratio, compact dimensions, optimum efficiency, economical design High self-suction capability Flange and shaft designed for direct mounting on the power take-off of commercial vehicles Low noise levels Increased pressure (350/400 bar) compared to standard pump A17VO Sizes 55 to 107 Nominal pressure 350 bar Maximum pressure 400 bar For commercial vehicles Open circuitAxial Piston Variable PumpA18VO Series 11RE 92270 Issue.

2 Code 2 Technical data 3 DRS Pressure controller with load sensing 8EP Proportional control electric 10 Dimensions size 55 12 Dimensions size 80 14 Dimensions size 107 16 Suction stud 19 Coupling flange 20 Connector for solenoids 21 Installation instructions 22 Other related documents 23 General instructions 242A18VO Series 11 | Ordering codeBosch Rexroth AG, RE 92270 code010203040506070809101112131415A18VO0 /11 NWK00 Axial Piston unit01 Bent-axis design, Variable , nominal pressure 350 bar, maximum pressure 400 bar, for commercial vehicles (trucks)A18 VOperating mode02 Pump, open circuitOSizes (NG)03 Geometric displacement, see table of values on page 6055080107 Control devices05508010704 Pressure controller with load sensing DRSP roportional control electricpositive controlU = 24 V EP2negative controlU = 24 V EP6 Connector for solenoids (see page 21)05 Without connector (without solenoid, only for hydraulic controller)

3 0 DEUTSCH molded connector, 2-pin without suppressor diodePAdditional functions 106 Without additional functions0 Series07 Series 1, index 111 Configuration of ports and fastening threads08 Metric, port threads with profiled sealing ring according to DIN 3852 NDirections of rotation09 Viewed on drive shaftclockwiseRcounter-clockwiseLSeals10 FKM (fluor-caoutchouc) including the 2 shaft seal rings in FKMWM ounting flange11 Special flange ISO 7653-1985 (for trucks)K0 Drive shaft12 Splined shaft similar to DIN ISO 14 (for trucks)E8 Splined shaft E8 with coupling flangeC8 Port plate for service lines13 Threaded ports A and S at rear1 Threaded ports A and S at rear, with suction stud mounted in S2 Auxiliary functions 214 Without auxiliary functions0 Standard / special version15 Standard version0 Special versionS = Available = On request Technical data | A18VO Series 11 3 RE 92270 , Bosch Rexroth AGTechnical dataHydraulic fluidBefore starting project planning, please refer to our data sheets RE 90220 (mineral oil) and RE 90221 (environmen-tally acceptable hydraulic fluids)

4 For detailed information regarding the choice of hydraulic fluid and application environmentally acceptable hydraulic fluids are used, the limitations regarding technical data or other seals must be observed. Please contact pump A18VO is not suitable for operation with water-containing HF hydraulic fluid. Selection diagram-40 -25 -10 10 30 50 90 115 70 0 51040602010020040060010001600-40 0 20 40 60 80 100 -20 1600 opt1636VG 22VG 32VG 46VG 68VG 1005 Viscosity [mm2/s]tmin = -40 C Hydraulic fluid temperature range tmax = +115 CTemperature t [ C]Details regarding the choice of hydraulic fluidThe correct choice of hydraulic fluid requires knowledge of the operating temperature in relation to the ambient tem-perature.

5 In an open circuit the reservoir hydraulic fluid should be chosen so that the operating viscosity in the operating temperature range is within the optimum range ( opt see shaded area of the selection dia-gram). We recommended that the higher viscosity class be selected in each : At an ambient temperature of X C, an operating temperature of 60 C is set in the circuit. In the optimum operating viscosity range ( opt, shaded area), this corre-sponds to the viscosity classes VG 46 or VG 68; to be selected: VG case drain temperature, which is affected by pressure and speed, can be higher than the reservoir temperature. At no point of the component may the temperature be higher than 115 C.

6 The temperature difference specified below is to be taken into account when determining the viscosity in the the above conditions cannot be maintained due to extreme operating parameters, please contact and temperature of hydraulic fluidViscosity [mm2/s]TemperatureCommentTransport and storage at ambient temperatureTmin -40 C Topt = +5 C to +20 Cfactory preservation: up to 12 months with standard, up to 24 months with long-term(Cold) start-up max = 1600 TSt -40 Ct 3 min, without load (p 50 bar), n 1000 rpmPermissible temperature difference T 25 Kbetween Axial Piston unit and hydraulic fluidWarm-up phase < 1600 to 400T = -40 C to -25 Cat p pnom, n nnom and t 15 minOperating phaseTemperature difference T = approx.

7 12 K between hydraulic fluid in the bearing and at port RMaximum temperature115 Cin the bearing103 Cmeasured at port RContinuous operation = 400 to 10 opt = 36 to 16T = -25 C to +90 Cmeasured at port R, no restriction within the permissible dataShort-term operation min 7 Tmax = +103 Cmeasured at port R, t < 3 min, p < pnomShaft seal FKMT +115 Csee page 44A18VO Series 11 | Technical dataBosch Rexroth AG, RE 92270 of the hydraulic fluidFiner filtration improves the cleanliness level of the hydrau-lic fluid, which increases the service life of the Axial Piston unit. To ensure the functional reliability of the Axial Piston unit, a gravimetric analysis of the hydraulic fluid is necessary to determine the amount of solid contaminant and to deter-mine the cleanliness level according to ISO 4406.

8 A cleanli-ness level of at least 20/18/15 is to be very high hydraulic fluid temperatures (90 C to maxi-mum 115 C), a cleanliness level of at least 19/17/14 according to ISO 4406 is necessary. If the above classes cannot be achieved, please contact drain fluidThe case drain chamber is connected to the suction cham-ber. A case drain line from the case to the reservoir is not required (port "R" is plugged). On versions with DRS control, a case drain line for dis-charge from port "T" to the reservoir is absolutely essential (not necessary for EP control).Shaft sealThe FKM shaft seal may be used for case drain tempera-tures from -25 C to +115 the temperature range below -25 C, the values in the table on page 3 are to be observed.

9 Technical data | A18VO Series 11 5 RE 92270 , Bosch Rexroth AGOperating pressure rangeValid when using hydraulic fluids based on mineral oilsPressure at service line port ADefinitionNominal pressure pnom350 bar absoluteThe nominal pressure corresponds to the maximum design pressure pmax400 bar absoluteThe maximum pressure corresponds to the maximum operating pressure within the single operating period. The sum of the single operating periods must not ex-ceed the total operating operating period5 sTotal operating period50 hMinimum pressure (high-pressure side)10 bar absoluteMinimum pressure at the high-pressure side (A) which is required in order to pre-vent damage to the Axial Piston of pressure change RA max9000 bar/sMaximum permissible rate of pressure rise and reduction during a pressure change over the entire pressure at suction port S (inlet)Minimum pressure pS bar absoluteMinimum pressure at suction port S (inlet) which is required in order to prevent damage to the Axial Piston unit.

10 The minimum pressure is dependent on the speed and displacement of the Axial Piston pressure pS max2 bar absolute Rate of pressure change RA maxpnom t pTime tPressure p Pressure definitionPressure pt1t2tnSingle operating periodMinimum pressure (high-pressure side)Maximum pressure pmaxNominal pressure pnomTime tTotal operating period = t1 + t2 + .. + tnNoteValues for other hydraulic fluids, please contact Series 11 | Technical dataBosch Rexroth AG, RE 92270 of values Theoretical values, without efficiency and tolerances; values roundedSizeNG5580107 Displacement geometric, per revolutionVg maximum1)at Vg maxnnomrpm250022402150at Vg < Vg maxnmax1rpm340030002900 Speed maximum2)nmax2rpm375033503200 Flowat nnom and Vg maxqvL/min137179230 Powerat nnom, Vg max and p = 350 barPkW80105134 Torqueat Vg max and p = 350 barTNm305446596 Rotary stiffnessVg max to Vg Vg max bis 0(interpolated)cmaxNm/rad321034897167666 Moment of inertia for rotary angular acceleration rad/s 316002420019200 Case momentTGNm213241 Mass (approx.