Sumitomo Hansen P4 - Page 10

SELECTION
Mechanical power rating
AIR COOLED CONDENSER DRIVES
A5
refer to page A7
refer to page A2
for ratios < 9 refer to us
Procedure Reference Data
Mechanical power
rating P
Ratio
2
3
for
- - -
Ratio
P V P 2U - ACC - U D N
1
SELECTION DATA
Pm , Pa , n
HSS
, n
LSS
, i
N
Thrust load
F
x
PROGRAMME SELECTION
Absorbed Power Pa
P
Motor Power Pm
and
x
SF =1
,
75
x
SF = 2
P
Size
S
E
L
E
C
T
I
O
N
C
H
E
C
K
F
x
: ... kN
Pay attention to direction of F
x
! (Always downwards)
Check if
Size
P
Start-up torque T
S
Check if
T
S
1,5 x T
T =
P x 9,55
n
P: mechanical power rating (kW), see page A41
Mechanical torque of the gear unit (kNm)
n:
shaft speed (min
-1
)
F
x
F
xN
F
xN
see p. A41
see p. A41
Thermal rating see pages A6, A42
Total start-up time t
S
For other input speeds (n
1
), following equation can be applied:
t
S
@ n
1
=
1500
x t
S
@ 1500
n
1
Note: make sure that Ts, T and n refer to the same shaft (speed);
Design total start-up time @ 1500 min
-1
refers to the total start-up
time over the design lifetime of the gear unit, taking into account:
- number of start-ups
- duration of a single start-up
- input speed equal to 1500 min
-1
A =
T
S
: start-up torque (kNm)
T : mechanical torque rating of the gear unit (kNm)