Vogele Basic Training Hydraulics & Electrics

H.13.0 Annex
H.13.5 Applications
On account of their specific advantages and disadvantages, hydraulic drives are frequently used in
mobile work machines, such as construction machines and agricultural machines. In these instances,
loads are primarily raised and lowered ( fork lift trucks, diggers, hoists and road pavers, etc.) through
linearly articulated hydraulic cylinders.
Vehicles are often driven by rotating hydraulic gears or fluid convertors, e.g. with so-called inclined axle
or inclined disk machines with which high outputs can be transferred. The special feature in this respect
is that the hydraulic gears can more flexibly adjust the motion of a motor operating with an inflexible
or fixed speed to the operating conditions, as in the case of diesel locomotives, in particular.
Some typical applications involving road pavers are:
- Linearly articulated hydraulic cylinders (raising/lowering the screed)
- Rotating hydraulic gears (undercarriage control)
- Valve actuation
- Clutch and brake activation (wheeled pavers)
- Hydrostatic traction drives
- Hydraulic steering (wheeled pavers)