Hydraulic fluids
grooming equipment in the mountains), readily biodegradable hydraulic fluids are used. These fluids can be produced from mineral oil or using renewable materials. They are also referred to as bio-based hydraulic
Pressure-reducing valve (pressure control valve)
pressure-reducing valve and from p 2 to p 1 as a pressure-limiting valve . Pressure-reducing valves can be directly or pilot-controlled. In addition to the spool valves shown, there are also pressure-reducing
Strain gauge
under load. Strain gauges are suitable for the electrical measurement of all mechanical variables that can produce strain in the sensor. A differentiation is made between metal strain gauges ( thin foil strain
Flame-resistant hydraulic fluids
the HFA pressure fluids (DIN 24 320) require a special structure, while HFC and HFD pressure fluids can be used to operate all construction elements in hydraulic systems under certain constraints (VDMA 24
Centralised hydraulic oil supply
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
Oscilloscope
screen, set things down on paper and save curves. In addition, since the cathode ray oscilloscope can process signals of up to around 100 MHz, it has now largely eclipsed the other principles.
Pump control
system may be more cost-effective, consisting of one variable pump and several constant pumps , which can then be connected as desired ( Figure P 37 ). As larger masses are to be moved in the pump with the
Hydraulic motor
p L and the displacement V 2: In general, all pumps (with the exception of valve-controlled pumps) can now also be used as high-speed hydraulic motors. In addition, there is also a range of special designs
Dual variable pump
control ). In this case there is also a drive shaft throughout the controller, to which further pumps can be connected. In the case of a design according to the swash plate principle, the pistons of both cylinder
Circulation losses in hydraulic systems
circulation valve ( directional valve ) and the filter into the container. These circulation losses can be almost completely avoided by using a pressure/flow control for the pump.