A series of different consumers is supplied with hydraulic oil from a central drive station (Figure Z 4a) and (Figure Z 4b). As a result, the total performance to be installed does not need to be specified according to the peak consumption of each user, but according to the average consumption, which is again reduced if the individual consumers require hydraulic oil at different times. Equally, multiple circuits can be simultaneously supplied with hydraulic oil without reactions, as the central hydraulic oil supply constitutes a constant pressure system.
The benefits of a central hydraulic oil supply include:
- lower installed power,
- fewer devices (primarily pumps) and less space required
- simplified maintenance,
- sound optimisation in one place.
Central hydraulic oil supplies are often equipped with hydraulic accumulators (accumulator drive).
Another option is the pressure oil network with press-controlled variable pumps. Here, when sampling the flow rate, the pump(s) is/are expanded such that the pressure in the network remains constant (Figure Z 5).
Figure Z 4a: Centralised hydraulic oil supply: Device oriented plan
Figure Z 4b: Centralised hydraulic oil supply Circuit diagram
Figure Z 5: Centralised hydraulic oil supply with pressure-controlled pumps