Table des Matières
Publicité
ansen
Detailed example of selection
Waterring vacuum pump P a = 600 kW,
n 2 = 357 min -1
Mechanical power rating (page A5)
• Horizontal low speed shaft
• Parallel shafts
- application: see above
- load conditions: heavy duty 24h/24h
- prime mover: electric motor
SF = 1,75 (page A7)
P a x SF = 600 x 1,75 = 1050 kW
• Ratio:
n 1
1000
i =
= 2,80
=
n 2
357
• Size and
number of stages :
mechanical power rating P = 1150 kW
(page B1)
check : P a x SF = 1050 kW ≤ P = 1150 kW
dimensional drawings on pages C1 - C2
• Parallel shafts, high speed shaft to the right
• Machine shaft to the left
• Normal solid low speed shaft
Please indicate gear unit type on the gear unit specifi-
cation sheet (p. A9):
1
2
3
4
5
6
Q
H
P
F
1
-
R
Thermal power rating (page A6)
First case
Operational parameters:
. ambient temperature = 20°C :
correction factor without forced cooling : a = 1
. operating time 24 h/day & > 4000 h/year : b = 1
. mounted outdoors, normal working area;
v A = air flow: ≥ 1,4 m/s
- Thermal power rating for gear unit without forced cooling:
P tn = 490 kW (p. B4)
Check: 600 kW ≤ ? 490 kW x 1 x 1 x 1
Extra cooling is required.
- Cooling fan possible: P tf = 900 kW (p. B4)
correction factor for ambient temperature with one
fan cooling:
Check: P a ≤ ? P tf x d f x b
600 kW ≤ ? 900 kW x 1 x 1 = 900 kW : OK!
Cooling fan solution can be selected.
Dimensional drawing on pages C1 - C2.
no extra cooling
fan
double fan
cooling coil
SELECTION
Detailed example of selection
H
2
P
3
9
2,8
F
4
1
5
R
6
L
7
N
8
7
8
9
L
N -
2, 8
(p. A6 & B6)
(p. A6)
: c = 1
(p. A6 & B8)
= 490 kW : not OK!
: d f = 1
(p. A6 & B10)
X
p. A9
Second case
Operational parameters:
. ambient temperature = 40°C :
correction factor without forced cooling : a = 0,68 (p. A6 & B6)
. operating time 24 h/day & > 4000 h/year : b = 1 (p. A6)
. mounted outdoors, normal working area;
v A = air flow: ≥ 1,4 m/s
. correction factor with forced cooling; 1 fan : d f = 0,72 (p. A6 & B10)
. correction factor with forced cooling; 2 fans: d ff = 0,72 (p. A6 & B12)
- Gear unit without forced cooling: P tn = 490 kW (p. B4)
Check: P a ≤ ? P tn x a x b x c
600 kW ≤ ? 490 kW x 0,68 x 1 x 1 = 333 kW : not OK!
Extra cooling is required.
- Cooling fan possible: P tf = 900 kW (p. B4)
Check: P a ≤ ? P tf x d f x b
600 kW ≤ ? 900 kW x 0,72 x 1 = 648 kW : OK!
Cooling fan solution can be selected.
Dimensional drawing on pages C1 - C2.
no extra cooling
fan
X
double fan
cooling coil
- Water available
+
• Cooling coil: P
= 1100 kW (p. B4)
tc
Check: P a ≤ ? (P tn x a x c + P
600 kW ≤ ? (490 x 0,68 x 1 + 1100) x 1 = 1433 kW : OK!
Cooling coil solution can be selected.
Description page A3, dimensional drawing page C5
no extra cooling
fan
double fan
cooling coil
+
• Oil-to-water cooler: P
= 850, 1400 kW
tw
Check: P a ≤ (P tn x a x c + P
600 kW ≤ ? (490 x 0,68 x 1 + 850) x 1 = 1183 kW : W1 OK!
Oil-to-water cooler solution size 1 can be selected
Description and options: pages A3 - A4,
Dimensional drawing: refer to us
cooling system
size 1
X
2
3
oil-to-water
X
oil-to-air
pressure lubrication
- No water available
+
Oil-to-air cooler: P
= 650, 1150 kW (A1 - A2, p. A6)
ta
Check: P a ≤ ? (P tn x a x c + P
600 kW ≤ ? (490 x 0,68 x 1 + 650 x 0,72) x 1 = 801 kW : A1 OK!
Oil-to-air cooler solution size 1 can be selected.
Description and options: pages A3 - A4,
Dimensional drawing page: refer to us
cooling system
size 1
X
2
3
oil-to-water
oil-to-air
X
pressure lubrication
: c = 1 (p. A6 & B8)
p. A9
+
) x b
tc
p. A9
X
(W1 & W2, p. A6)
+
) x b
tw
p. A9
+
x d f ) x b
ta
p. A9
HANSEN P4991227 03/2021
SELECTION
E
EN
A8
A8
Publicité
Table des Matières
