Bosch Rexroth 10 Series Manuale utente

RE 92650/2020-03-03, Bosch Rexroth AG

Axial piston variable pump

A1VO Series 10

RE 92650/2020-03-03

Replaces: 12.2017

Features

▶ Variable displacement pump with axial piston rotary

group ofswashplate design forhydrostatic drives

inopen circuit

▶ Flow isproportional tothe drive speed and

displacement.

▶ The ﬂow can be inﬁnitely varied by controlling the

swashplate angle.

▶ Signiﬁcant fuel savings up to15% compared toﬁxed

systems

▶ Optimized efﬁciency, though same power at less

fuelconsumption

▶ Increased service life compared togear pumps

▶ Compact design by integrated controller

▶ A wide range ofhighly adaptable control devices for all

important applications

▶ Low noise

▶ High power density

▶ Excellent suction characteristics

▶ High ﬂexibility through interchangeable through

driveadapters

▶ For load-sensing systems in smaller working machines

▶ Sizes 18, 28, 35

▶ Nominal pressure 250bar

▶ Maximum pressure 280bar

▶ Open circuit

Contents

Type code 2

Hydraulic ﬂuid 4

Working pressure range 6

Technical data 7

DR/DN – Pressure controller 9

DRS0/DNSO – Pressure controller with load-sensing 10

D3/D4 – Pressure controller with override 11

Dimensions size 18 and size 28 12

Dimensions size 35 16

Dimensions for through drives 19

Overview ofmounting options 20

Combination pumps A1VO + A1VO 21

Connector forsolenoids 22

Installation instructions 23

Project planning notes 25

Safety instructions 26

Bosch Rexroth AG, RE 92650/2020-03-03

2A1VO Series 10 | Axial piston variable pump

Type code

Axial piston unit

01 Swashplate design, variable, nominal pressure 250bar, maximum pressure 280bar A1V

Operating mode

02 Pump, open circuit O

Size (NG)

03 Geometric displacement, see technical data onpage 7 018 028 035

Control device 18 28 35

04 Pressure controller Setting range 100 to250bar ● ● ● DR

with load-sensing ● ● ● DRS0

Setting range 20 to100bar ● ● ● DN

with load-sensing ● ● ● DNS0

with override, electrically proportional, negative control U= 12 V ● ● ● D3

U= 24 V ● ● ● D4

Controller design and mounting 18 28 35

05 Mounted (only possible with control valve D3 and D4) ● ● ● A

Cartridge (only possible with control valve DR, DRS0, DN and DNS0) ● ● ● C

Setting 18 28 35

06 Adjustable 2

Connector for solenoids1) (see page22) 18 28 35

07 Without connector (without solenoid, only for hydraulic control) ● ● ● 0

DEUTSCH - molded connector, 2-pin, without suppressor diode ● ● ● P

Additional function

08 Without additional function 0

Series

09 Series 1, index 0 10

Version ofport and fastening threads 18 28 35

10 Threaded ports according toISO 11926-1 with O-ring seal (ANSI),

Metric fastening thread according toDIN13 onthe through drive ● ● ● B

Threaded ports, metric, according toISO 6149-01 with O-ring seal,

Metric fastening thread according toDIN13 onthe through drive ● ● ● M

Direction ofrotation 18 28 35

11 Viewed ondrive shaft clockwise ● ● ● R

counter-clockwise ● ● ● L

Sealing material

12 FKM (ﬂuoroelastomer) V

Mounting ﬂange 18 28 35

13 ISO 3019-1 (SAE J744) 82-2 ● ● –A2

101-2 ● ● ● B2

ISO 3019-2 (metric) 80-2 ● ● –K2

1) Connectors for other electric components may deviate

Type code

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

A1V O 2 0 / 10 V 00 – 0

RE 92650/2020-03-03, Bosch Rexroth AG

3Axial piston variable pump | A1VO Series 10

Type code

2) For size 35, not for through drive

3) Inaccordance with ANSI B92.1a

4) Mounting holes pattern viewed onthrough drive with working

portB on right.

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

A1V O 2 0 / 10 V 00 – 0

Drive shaft (permissible input torque, see page8) 18 28 35

14 Splined shaft ANSI B92.1a

(Bosch Rexroth recommends selecting the

respectively larger drive shaft for through drive units)

3/4 in 11T 16/32DP ● ● – S3

7/8 in 13T 16/32 DP2) ● ● ● S4

1 in 15T 16/32DP – – ● S5

Parallel keyed shaft

Through drive not permissible

ISO 3019-1 SAE Ø 19-1 ● ● – K3

ISO 3019-2 metric Ø 20 ● ● – P3

Working port 18 28 35

15 Threaded ports B and S, lateral, on opposite sides ● ● ● 1

Threaded ports B and S, rear, not for through drive ● ● ○ 9

Through drives (for mounting options, see page20)

16 Flange SAE J744 Hub forsplined shaft3)

Diameter Mounting4) Designation Diameter Designation 18 28 35

Without through drive ● ● ● 0000

82-2 (A) A2 5/8 in 9T 16/32 DP S2 ● ● ● A2S2

3/4 in 11T 16/32 DP S3 ● ● ● A2S3

7/8 in 13T 16/32 DP S4 ● ● ● A2S4

101-2 (B) B2 7/8 in 13T 16/32 DP S4 ● ● ● B2S4

1 in 15T 16/32 DP S5 – – ● B2S5

Reduction ofgeometric displacement

17 Without reduction 00

Standard/special version

18 Standard version 0

●= Available ○= On request –= Not available

Notes

Note the project planning notes onpage25.

Bosch Rexroth AG, RE 92650/2020-03-03

4A1VO Series 10 | Axial piston variable pump

Hydraulic ﬂuid

The axial piston unit A1VO isdesigned for operation

withHLP mineral oil according toDIN 51524.

Application instructions and requirements for

hydraulicﬂuid selection, behavior during operation

aswellasdisposal and environmental protection should

betaken from the following data sheets before the start

ofproject planning:

▶ 90220: Hydraulic ﬂuids based onmineral oils and

related hydrocarbons

Selection ofhydraulic ﬂuid

BoschRexroth evaluates hydraulic ﬂuids onthebasis

oftheFluid Rating according tothe technical

datasheet90235.

Hydraulic ﬂuids with positive evaluation inthe Fluid Rating

are provided inthe following technical datasheet:

▶ 90245: BoschRexroth Fluid Rating List forRexroth

hydraulic components (pumps and motors)

Selection ofhydraulic ﬂuid shall make surethat

theoperating viscosity inthe operating temperature range

iswithin theoptimum range (νopt; see selection diagram).

Viscosity and temperature ofhydraulic ﬂuids

Viscosity Shaft seal Temperature2) Comment

Cold start νmax ≤ 1600 mm²/s FKM ϑSt≥-25 °C t≤ 3 min, without load (p≤ 50 bar), n≤ 1000 rpm

Permissible temperature difference between axial piston

unitand hydraulic ﬂuid inthe system maximum 25 K

Warm-up phase ν= 1600 … 400 mm²/s t≤ 15 min, p≤ 0.7×pnom and n≤ 0.5×nnom

Continuous

operation

ν= 400 … 10 mm²/s1) FKM ϑ≤ +90 °C measured at port L

νopt = 36 … 16 mm²/s optimal operating viscosity and efﬁciency range

Short-term

operation

νmin = 10 … 7 mm²/s FKM ϑ≤ +90 °C t≤ 1 min, p≤ 0.3×pnom , measured at port L

▼Selection diagram

−25 −10 10 30 40 50 90 11570

100

200

400

600

1000

1600

VG 22

VG 32

VG 46

VG 68

VG 100

Viscosity ν[mm2/s]

Maximum permissible viscosity oncold start

Warm-up phase

Continuous operation

νopt

Minimum permissible viscosity forshort-term operation

Temperature ϑ[°C]

1) This corresponds, forexample ontheVG46, toatemperature

range of+4 °C to+85 °C (see selection diagram)

2) If thetemperature atextreme operating parameters cannot

beadhered to, please contact us.

RE 92650/2020-03-03, Bosch Rexroth AG

5Axial piston variable pump | A1VO Series 10

Hydraulic ﬂuid

Notice

The axial piston unit is not suitable for operation with

water-free HF hydraulic ﬂuids / HF hydraulic ﬂuids

containing water / HFx hydraulic ﬂuids.

Filtration ofthe hydraulic ﬂuid

Finer ﬁltration improves thecleanliness level

ofthehydraulic ﬂuid, which increases theservice life

oftheaxial piston unit.

A cleanliness level ofat least 20/18/15

istobemaintainedaccording toISO4406.

At ahydraulic ﬂuid viscosity ofless than 10 mm²/s

(e.g.duetohigh temperatures during short-term

operation), acleanliness level ofatleast 19/17/14

according toISO 4406 isrequired.

For example, the viscosity is 10 mm²/s at:

▶ HLP 32 atemperature of73 °C

▶ HLP 46 atemperature of85 °C

Bosch Rexroth AG, RE 92650/2020-03-03

6A1VO Series 10 | Axial piston variable pump

Working pressure range

Pressure atworking port B Deﬁnition

Nominal pressure pnom 250 bar The nominal pressure corresponds tothe maximum design pressure.

Maximum pressure pmax 280 bar The maximum pressure corresponds tothe maximum working pressure within

asingle operating period. The sum ofthe single operating periods must not

exceed the total operating period (maximum number ofcycles: approx. 1 million).

Single operating period 0,05s

Total operating period 14 h

Minimum pressure pBabs

(high-pressure side)

14 bar1) Minimum pressure onthehigh-pressure side (B) which isrequired inorder

toprevent damage tothe axial piston unit.

Rate ofpressure change RAmax 16000bar/s Maximum permissible pressure build-up and reduction speed during apressure

change across the entire pressure range.

Pressure atsuction port S (inlet)

Minimum pressure pSmin 0.8bar abs. Minimum pressure atsuction port S(inlet) which isrequired toprevent damage

tothe axial piston unit. The minimum pressure depends onthe rotational speed

and displacement ofthe axial piston unit.

Maximum pressure pSmax 5bar abs.

Case pressure at port L1, L2

Maximum pressure pLmax 2bar abs. Maximum 0.5 bar higher than inlet pressure atport S,

but not higher than pLmax.

▼ Pressure deﬁnition

Pressure p

t2tn

Single operating period

Minimum pressure (high-pressure side)

Maximum pressure pmax

Nominal pressure pnom

Time t

Total operating period = t1+ t2+ ... + tn

▼ Rate ofpressure change RAmax

pnom

∆t

∆p

Time t

Pressure p

Notice

▶ Working pressure range applies when using

hydraulicﬂuids based onmineral oils. Please contact

usforvalues forother hydraulic ﬂuids.

▶ Inaddition tothe hydraulic ﬂuid and the temperature,

the service life ofthe shaft seal isinﬂuenced bythe

rotational speed ofthe axial piston unit and the

casepressure.

▶ The case pressure must not be below the

ambientpressure.

1) Please contact us about lower pressures

RE 92650/2020-03-03, Bosch Rexroth AG

7Axial piston variable pump | A1VO Series 10

Technical data

Size NG 18 28 35

Geometric displacement, per revolution Vg max

Vg min

cm3

Maximum rotational speed1)2) at Vg max nnom rpm 3300 3200 3000

Flow at nnom and Vg max qvl/min 59 89 105

Power at nnom, Vg max and Δp = 250 bar PkW 25 37 44

Torque at Vg max and Δp = 250 bar MNm 72 111 139

Rotary stiffness

Drive shaft

3/4 in 11T 16/32DP S3 ckNm/rad 9.78 9.78 –

7/8 in 13T 16/32 DP S4 ckNm/rad 12.88 12.88 18.6

1 in 15T 16/32DP S5 ckNm/rad – – 22.9

Ø 20 mm P3 ckNm/rad 16.49 16.49 –

Ø 19.05 mm K3 ckNm/rad 17.27 17.27 –

Moment ofinertia oftherotary group JTW kgm20.000686 0.000737 0.00159

Maximum angular acceleration3) αrad/s² 6800 5500 5000

Case volume Vl 0.5 0.5 0.6

Weight (without through drive) approx. mKg 12.3 12.3 18.4

Weight (with through drive) approx. mKg 13.5 13.5 19.8

Determining theoperating characteristics

Flow qv=Vg×n×ηv[l/min]

1000

Torque M=Vg×Δp [Nm]

20×π×ηhm

Power P=2π×M×n=qv×Δp [kW]

60000 600×ηt

Key

VgDisplacement per revolution [cm3]

Δp Differential pressure [bar]

nRotational speed [rpm]

ηvVolumetric efﬁciency

ηhm Hydraulic-mechanical efﬁciency

ηtTotal efﬁciency (ηt= ηv×ηhm)

Notice

▶ Theoretical values, without efﬁciency and tolerances;

values rounded.

▶ Operation above themaximum valuesorbelow

theminimum values may result inaloss offunction,

areduced service life orinthe destruction oftheaxial

piston unit. We recommend testing loads through

experimentation orcalculation/simulation and

comparing them with the permissible values.

1) The values are applicable:

‒ forthe optimum viscosity range from νopt = 36 to16 mm2/s

‒ with hydraulic ﬂuid onthebasis ofmineral oils

– atapressure ofpS≥ 1bar abs.at suction port S.

2) For apressure pS<1 bar at suction port S, please contact us.

3) The data are valid forvalues between the minimum required and

maximum permissible rotational speed. Valid forexternal excitation

(e.g. diesel engine 2 to8 times rotary frequency; cardan shaft

twice the rotary frequency). The limit value isonly valid forasingle

pump. The load capacity oftheconnection parts must

beconsidered.

Bosch Rexroth AG, RE 92650/2020-03-03

8A1VO Series 10 | Axial piston variable pump

Technical data

Permissible radial and axial forces of the drive shaft

Size NG 18 28 35

Maximum radial forces a/2

a/2a/2

Fq max N 150 150 650

Maximum axial forces

–

Fax

± Fax max N 400 400 650

Note

▶ The values given are maximum values and do not

apply to continuous operation. All shaft loads affect

bearing life!

Permissible input and through-drive torques

Size 18 28 35

Torque at Vg max und Δp = 250 bar1) Mmax Nm 72 111 139

Maximum input torque ondrive shaft2)

S3 3/4 in ME max Nm 143 143 –

S4 7/8 in ME max Nm 198 198 198

S5 1 in ME max Nm – – 319

P3 Ø 20 mm ME max Nm 151 151 –

K3 Ø 19.05 mm ME max Nm 147 147 –

Through-drive torque, maximum

S3 3/4 in MD max Nm 87 87 –

S4 7/8 in MD max Nm 87 87 139

S5 1 in MD max Nm – – 139

▼ Distribution oftorques

M1M2

1. pump 2. pump

Torque at 1st pump M1

Torque at 2nd pump M2

Torque at 3rd pump M3

Input torque ME=M1+ M2+ M3

ME<ME max

Through-drive torque MD=M2+ M3

MD<MD max

1) Efﬁciency not considered

2) For drive shafts free ofradial force

RE 92650/2020-03-03, Bosch Rexroth AG

9Axial piston variable pump | A1VO Series 10

DR/DN – Pressure controller

The pressure controller limits the maximum pressure at the

pump outlet within the control range ofthe variable pump.

The variable pump only supplies as much hydraulic ﬂuid as

isrequired bythe consumers. If the working pressure

exceeds the pressure command value at the pressure valve,

the pump will regulate toasmaller displacement toreduce

the control differential.

▶ Basic position indepressurized state:Vg max.

▶DR

Setting range1) for pressure control 100 to250bar.

Standard is250bar

Setting range1) for pressure control 20 to100bar.

Standard is100bar

▼ Characteristic curve DR

250

qv min qv max

100

Working pressure p [bar]

Flow qV

Hysteresis/pressure increase Δp max

▼ Circuit diagram DR

Controller data

NG 18 28 35

Hysteresis and repeat precision Δp Maximum 5 bar

Pilot ﬂuid consumption Approx. 3 l/min maximum

1) Inorder toprevent damage tothe pump and the system,

thepermissible setting range must not beexceeded.

Lower values on request

Bosch Rexroth AG, RE 92650/2020-03-03

10 A1VO Series 10 | Axial piston variable pump

DRS0/DNSO – Pressure controller with load-sensing

Inaddition tothe pressure controller function (DR), the

load-sensing controller works as load pressure guided ﬂow

controller and adjusts the displacement ofthe pump tothe

quantity required by the consumer. The load-sensing

controller compares the pressure upstream the metering

oriﬁce tothe one downstream the oriﬁce and keeps the

pressure drop (differential pressure ∆p) occurring here and

thus the ﬂow constant.

The swinging in by the pressure or the ﬂow controller

always takes priority.

▶DRS0

Setting range1) for pressure control 100 to250bar.

▶DNS0

Setting range1) for pressure control 20 to100bar.

Notice

Version DRS0/DNSO does not have any connection

fromXtothe reservoir; thus, the LS must be unloaded in

thesystem.

▼ Characteristic curve DRS0

250

100

qv min qv max

Working pressure p [bar]

Flow qV

Hysteresis/pressure increase Δp max

▼ Characteristic curve at variable rotational speed

qV max

qV min

nmin nmax

Flow qV[L/min]

Rotational speed n

Hysteresis ΔqVmax

▼ Circuit diagram DRS0

1 The metering oriﬁce (control block) is not included in the

scopeofdelivery.

Differential pressure ∆p

Standard setting: 14 bar. If another setting is required,

please state in the plain text.

Controller data

For data for the pressure controller DR, please refer

topage9. Maximum ﬂow differential (hysteresis

andincrease) measured at drive speed n = 1500 rpm

andtﬂuid=50 °C

NG 18 28 35

Volume ﬂow difference ΔqV max 3 l/min

Maximum pilot ﬂuid consumption approx. 4 l/min

1) Inorder toprevent damage tothe pump and the system,

thepermissible setting range must not beexceeded.

Lower values on request

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