Technical Data - Bosch Rexroth A6VM series 71 Manual

8 A6VM series 71 | Axial piston variable motor

Technical data

Technical data
Size
Displacement geometric,
per revolution
Maximum speed 1)
(complying with the maximum
permissible inlet flow)
Inlet flow 2)
Torque 3)
Rotary stiffness
Moment of inertia for rotary group
Maximum angular acceleration
Case volume
Weight, approx.
▼ Permissible displacement in relation to speed
1.0
0.8
V
g x
0.63
0.4 V
g x
0.38
0.2
0
0.2 0.4 0.6 0.8
Rotational speed n / n
Notes
▶ Theoretical values, without efficiency levels and toler-
ances; values rounded
▶ Operation above the maximum values or below the mini-
mum values may result in a loss of function, a reduced
service life or in the destruction of the axial piston unit.
Other permissible limit values, such as speed variation,
reduced angular acceleration as a function of the fre-
quency and the permissible angular acceleration at start
(lower than the maximum angular acceleration) can be
found in data sheet 90261.
Bosch Rexroth Corp., RE-A 91610/12.2015
at V
g max
at V < V (see diagram)
g g x
at V
g 0
at n and V
nom g max
at V and
g max
Δp = 6500 psi (450 bar)
V to V /2
g max g
V /2 to 0
g
(interpolated)
NG85,
115, 150
NG170
NG60,
215
1.0 1.2 1.4 1.74
1.58 1.62
nom
NG 60
V
in 3 3.78
g max
cm 3 62.0
V in 3 0
g min
cm 3 0
V in 3 2.26
g x
cm 3 37
n
rpm 4450
nom
n rpm 7200
max
n
rpm 8400
max
q gpm 73
v max
l/min 276
T
lb-ft 326
Nm 444
c
lb-ft/rad 10695
min
kNm/rad 14500
c
lb-ft/rad 33412
min
kNm/rad 45300
J
lb-ft 2 0.1020
TW
kgm 2 0.0043
α
rad/s² 21000
V
gal 0.21
l 0.8
m
lbs 62
kg 28
Determining the operating characteristics
V
Inlet flow q =
v
231 × η
q × 231 × η
Rotational
v
n =
speed
V × Δp × η
g
Torque T =
24 × π
2 π × T × n
Power P =
33000
4)
Key
= Displacement per revolution [in
V
g
= Differential pressure [psi (bar)]
Δp
= Rotational speed [rpm]
n
= Volumetric efficiency
η
v
= Mechanical-hydraulic efficiency
η
mh
= Total efficiency (η
η
t
The values are valid:
1)
– For the optimum viscosity range from ν
(36 to 16 mm
– with hydraulic fluid on the basis of mineral oil
Note inlet flow limitation due to counterbalance valve (see page 65).
2)
Torque without radial force, With radial force see page 9.
3)
Values in this range on request
4)
85 115 160
5.20 7.05 9.28
85.2 115.6 152.1
0 0 0
0 0 0
3.11 4.21 5.55
51 69 91
3900 3550 3250
6800 6150 5600
8350 7350 6000
88 108 131
332 410 494
448 608 800
610 828 1089
16521 27511 32084
22400 37300 43500
49785 76559 91458
67500 103800 124000 156400 195600
0.1709 0.2610 0.4295
0.0072 0.0110 0.0181
17500 15500 11000
0.26 0.40 0.45
1.0 1.5 1.7
79 101 134
36 46 61
× n V
(
g g
[gpm]
1000 × η
v
q × 1000 × η
(
v v
[rpm]
V V
g
V × Δp × η
(
mh g
[lb-ft]
20 × π
q × Δp × η
(
2 π × T × n
v t
= [HP]
1714 60000
3 (cm
= η • η )
t v mh
opt
2 /s)
170 215
10.48 13.21
171.8 216.5
0 0
0 0
3.97 5.00
65 82
3100 2900
4900 4800
5750 5500
141 166
533 628
903 1139
1230 1550
38279 51334
51900 69600
115355 144267
0.5055 0.7190
0.0213 0.0303
11000 10000
0.61 0.74
2.3 2.8
137 172
62 78
× n
)
[l/min]
v
)
v
[rpm]
g
)
mh
[Nm]
q × Δp × η
)
v t
= [kW]
600
3) ]
= 170 to 75 SUS