Optibelt ZRL, Technical Manual

Page: 39 / 98

38
4.4 ZRL-V drive design
Drive design of
optibelt ZRL-V
joined endless timing belts for conveyor systems,
z
emax
= 6, v
≤≤≤≤≤
2 m/s
Formulae Example
z
enom
= = 20
20
≥
z
emax
z
e
= z
emax
= 6
Number of teeth z
enom
in mesh
z
enom
= for i = 1, rounded down if necessary
Number of teeth in mesh z
e
considered z
emax
= 6
z
enom
≥
z
emax
z
e
= z
emax
z
enom
< z
emax
z
e
= z
enom
z
k
2
40
2
→
→ →
Section and number of teeth on pulley
Section selection using permissible circumferential
force with maximum section width - see Table 4.3,
page 41, z
emax
= 6 S
zul
(section, b
max
)
≥
S
Bn3
Alternative:
Section selection using the torque/speed graph for
z
emax
= 6, page 32, 33 with theoretical z
1
z
1
= z
1
= z
2
= z
k
for i = 1
If z
1
=
z
2
, calculate the drive layout as for ZRM/ZRP p. 22 and 23
Section T10 S
zul
(T10, b
max
= 50 mm) = 1425 N
≥
1177 N
Section T10 see page 33
z
1
= = 41.4
d
w1th
·
π
t
131.7 ·
π
10
Selection of number of teeth z
1
and z
2
from the
standard pulley range, pages 50 to 82, pulley material
and fitting see Table 5.3, page 44
Are clearance diameters and permissible bore sizes acceptable?
Clearance diameters incl. space for fitting > D
B
(or d
a
) + 2 · h
s
Alternative: design torque M
B
M
B
= c
2
· M
Ab
M
Ab
=
Effective belt speed v
eff
v
eff
=
T10 standard pulleys see page 82
z
1
= z
2
= 40 d
w1
= d
w2
= 127.32 mm
Diameter over flanges D
B
= 131 mm, bore d from 16 to 40 mm
Clearance diameter > 131 + 2 · 4.5 140 mm
≤
150 mm, h
s
see page 5
M
B
= 1.6 · 46.84 = 74.9 Nm M
Ab
= = 46.84 Nm
v
eff
= = 0.97
Timing belt and pulley width
Transmissible circumferential force S
spec
see
Table 4.3, page 41 per tooth in mesh 10 mm
belt width
S
spec
= S
spec
(section)
Alternative:
Transmissible torque M
spec
see Table 4.3,
page 41 per tooth in mesh and
10 mm belt width
M
spec
= M
spec
(section, z
k
)
S
spec
= S
spec
(T10) = 47.41
M
spec
= M
spec
(T 10, z
1
= 40)= 3.02
S
n3
· d
w
2000
735.75 · 127.32
2000
d
w1
· n
1
19100
127.32 · 145
19100
Nm
cm
N
cm
m
s