Engineering Guide CDA3000
2-15
2 Drive definition
DE
EN
1
2
3
4
5
6
7
A
2.4.1 Example 1:
Trolley drive for
gantry crane
Because of the narrow track width the trolley has a central drive powering
a running wheel on each side. The running wheels are coupled together
by a shaft. The drive system is a four-pole helical gearbox motor with
brake.
Figure 2.2
Standard trolley drive with geared motor
Known data:
Intrinsic weight of the trolley
5 t
Lifting weight
10 t
Running speed
30 m/min.
Two wheels are driven
Wheel diameter
315 mm
Journal diameter
80 mm
Friction pairing (rail/wheel)Steel/steel
Transmission gear
z1=18
z2=34
Efficiency of the drive
80%
Mass moment of inertia of the running wheels
and the shaft
0.85 kgm²
Acceleration and braking time
1.5 s
Max. factor for starting torque
1.25