Fluid Specifications; Determination Of Nominal Motor Size - Danfoss H1B 060 Service Manual

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cm3
Technical specifications

Fluid specifications

Determination of nominal motor size

18 | © Danfoss | August 2018
Fluid specifications
Features
Minimum intermittent
Viscosity Recommended range
Maximum intermittent
Minimum
1)2)
Temperature range Rated
Maximum intermittent
Required cleanliness per ISO 4406
Efficiency (charge pressure filtration)
Cleanliness and Filtration
Efficiency (suction / return line filtration)
Recommended inlet screen mesh size
1)
At the hottest point, normally case drain port.
2)
Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.
Based on SI units
V • n
Q = g
e
1000 •
v
V • p •
M = g mh
e
20 •
M • n Q • p •
P = e = e
e
9550 600
Q • 1000 •
n =
e v
V
g
Where:
Q Input flow (l/min)
e
M
Output torque (N•m)
e
P Output power (kW)
e
-1
n
Speed (min )
V
Motor displacement per rev. (cm
g
p High pressure (bar)
high
p
Low pressure (bar)
low
∆p High pressure minus Low pressure (bar)
η
Motor volumetric efficiency
v
η Mechanical-hydraulic efficiency
mh
η
Motor total efficiency (η
t
Based on US units
Q =
e
M =
e
t P =
e
n =
Where:
Q
e
M
e
P
e
n
3 V
/rev)
g
p
high
p
low
∆p
η
v
η
mh
η
• η )
t
v mh
All sizes
Unit
7 [49]
2
mm /s
12-80 [66-366]
[SUS]
1600 [7416]
-40 [-40]
°C
104 [220]
[°F]
115 [240]
-
22/18/13
β = 75 (β
15-20
β-ratio
β = 75 (β
35-45
µm 100 – 125
V • n
g
231 •
v
V • p •
g mh
2 •
V • n • p •
g t
396 000
Q • 231 •
e v
V
g
Input flow [US gal/min]
Output torque [lb•in]
Output power [hp]
Speed [rpm]
Motor displacement per rev. [in
High pressure [psi]
Low pressure [psi]
High pressure minus Low pressure [psi]
Motor volumetric efficiency
Mechanical-hydraulic efficiency
Motor total efficiency (η • η
v
AX00000025en-US0504
≥ 10)
10
≥ 2)
10
3
/rev]
)
mh