Wire Ropes Under Bending and Tensile Stresses - Wire Ropes: Tension, Endurance, Reliability - page 202

25
Grad

S/d 2 = 68.3 N/mm 2

Müller (1966)

W − S. + FE d=11. 9 mm

W − S. + FE d=16. 3 mm
W

20

W − S. + FE d=23. 7 mm 8 Li .

− S. + FE d=24. 1 mm

W − S. + FE d=26. 1 mm

W − S. + FE d=26. 6 mm

15

W − S. + FE d=27. 8 mm

W − S. + SE d=24. 1 mm

W − S. + SE d=26. 6 mm
W − S. + SE d=27. 4 mm
W − S. + SE d=27. 7 mm

S. + SE d=24. 2 mm

10

S/d 2 = 30.0 N/mm 2
68.3 N/mm 2
300.0 N/mm 2

9

8

ʔˑ 1

ʔˑ 2

7

6

5

10 20 50 100

diameter ratio D/d

Fig. 3.21 Winding angle difference D # , Häberle ( 1995 )

tensile force S/d 2 = 62.5 N/mm 2 , is drawn in Häberle's Fig. 3.21 and conforms
to a great extent with the angle difference D # for the specific tensile force
S/d 2 = 68.3 N/mm 2 . Admittedly, however, the construction of the wire ropes used
in Figs. 3.21 and 3.53 is not identical.

Example 3.3 Rope line pressure

Data:

Warrington-Seale rope 6 9 36 sZ
Rope diameter d = 16 mm
Ratio r/d m = 0.54
Sheave diameter D = 400 mm
Rope tensile force S = 30 kN

Results:
Global line pressure, ( 3.27 ): q 0 ¼ 2 30 ; 000
400

¼ 150 N = mm :

Maximum line pressure, ( 3.28 )
lg q max
q 0

¼ 1 : 887 0 : 607 lg 117 0 : 939 lg 25 þ 0 : 316 lg 117 lg 25 ¼ 0 : 2324

q max
q 0

¼ 1 : 71

q max ¼ 1 : 71 150 ¼ 256 N = mm :

Winding angle difference, ( 3.29 )

lg D # ¼ 2 : 870 0 : 383 lg 117 1 : 073 lg 25 þ 0 : 171 lg 117 lg 25 ¼ 1 : 0722
D # ¼ 11 : 8 :