| Demag LRS travel wheel system |
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Demag LRS travel wheel system and accessories
Example 1
for a non-driven four-wheel carriage
A mass of 4000 kg has be moved on a concrete surface. This results in selection of a travel wheel with a Hydropur tyre. The mass to be moved is distributed over four wheels. The wheel load therefore amounts to 1000 kg. This results in selection of LRS unit size 200 (permissible wheel load 1200 kg). The standard top connection is ideal for connecting the LRS units to the superstructure.
Example 2
for a four-wheel carriage with central drive arrangement
A mass of 12500 kg has be moved with a main travel speed of 12.5 m/min. The positioning speed amounts to 3.1 m/min. The flat rails are laid with a track gauge dimension of 2.80 m. Due to the wheel load of 3125 kg, spheroidal-graphite cast-iron travel wheels in size 250 are selected (permissible wheel load 3500 kg). In order to keep the control system requirements to a minimum and still maintain simultaneous operation, a central drive unit is to be employed. This means that one motor has to move the entire mass of 12500 kg. The appropriate drive with the drive combination 32 is selected from the drive selection table (PDF format) for the LRS 250 A (page 8). Buffers on the LRS units protect the travel unit in an emergency situation.
Example 3
for a four-wheel carriage with two individual drives
A mass of 6000 kg has be moved with a main travel speed of 80 m/min on flat rails. Since quiet operation with gentle handling of the load is required, this results in selection of travel wheels with Hydropur tyres. The wheel load amounts to 1500 kg. This results in selection of LRS 250 F (permissible wheel load 1700 kg). For this travel speed, the selection table (PDF format) shows a geared motor that can move a mass of up to 4000 kg (drive combination 45). Two geared motors (individual drives) are selected with drive combination 45.
Note:
The drives have to be arranged opposite each other in order to avoid any distortion. Two horizontal guide roller arrangements are also needed to ensure that the carriage is guided on the rails. The optional pin-connection sets are selected to connect the LRS units to the superstructure.
