Operating instructions

99
21115144_en_310310 © Demag Cranes & Components GmbH
Lifting speed : 50 m/min 1)
No. of cycles per hour : 100 cycles/h
Lifting and lowering : (1+1) m/cycle = 2 m/cycle
Operating time per day : 8 h/day
Days per inspection interval : 250 days/inspection interval
In the operating time as calculated above, the D-SH hoist has transported the fol-
lowing loads:
Adding the load spectrum modules k
m
together results in the load spectrum factor:
k
mi
= 0,09
Thus, the actual duration of service amounts to:
S = k
mi
x T
i
x f = 0,09 x 133,3 x 1,2 = 14,4 hours
For classification in FEM group of mechanisms 1Am (see D-SH data plate) with a
theoretical duration of service of 800 hours (see table 4) the hoist has a theoretical
remaining duration of service of 785,6 hours.
Documentation
Enter these values in your documents.
This entry may appear as follows:
9.2 Example:
D-SH – 80 in 1Am
Table 4
Date Operating
hours
Load [%] km factor Load
factor
Actual
dura-
tion of
service
Theoretical use Remain-
ing dura-
tion of
service
from to
TI value
[h]
full 3/4 1/2 1/4 without k
mi
f S [h]
D [h] / group of
mechanisms
D-S [h]
3.1.-- 30.12.-- 133,3
5 - 30 15 50
0,09 1,2 14,4 800 / 1Am 785,6
0,05 - 0,0375 0,0024 -
1) Unit infinitely variable, therefore assumed mean speed
T
i
=
2 x 100 x 8 x 250
= 133,3 h/inspection interval
60 x 50
30 % of time with ½ load
15 % of time with ¼ load
50 % of time with no load
5 % of time with full load
Time
[%]
51550
100
k
m
values
30
0,05
0,0016+0,0008 = 0,0024
3 x 0,0125 = 0,0375