Oil hydraulics
Area of hydraulics which works with mineral oil or oil-like hydraulic fluids whose key characteristics are sufficient viscosity coupled with good lubricating performance. All devices used in oil hydraulics
Power losses
internal and external leakage losses and compression losses , losses resulting from the flow of the fluid (losses due to changes in cross section or direction, churning losses, friction losses), mechanical
Resonance
amplifies the oscillation amplitude, which may lead to self-destruction, even at lower power. In fluid technology, the resonance is primarily of importance for systems with feedback () and in the case
Flow rate range of flow requirement
: Range between the minimum and maximum flow rate as a factor of the temperature of the hydraulic fluid at a constant pressure difference: Q = f ( t , p = const.) under stated test conditions.
Framework conditions
conditions, such as the range of the working temperature, features of the ambient air, type of >hydraulic fluid, amongst others. Operating conditions, such as load curve, dynamic requirements Stiffness , >noise
Loop line
Ring-shaped (loop) hydraulic fluid line to supply multiple consumers. Compared with a stub line, the loop line enables: a balanced supply of pressure, i.e. there are smaller pressure fluctuations and smaller
Safety gate valve
the movable protective grid of the machine in that it interrupts the incoming flow of the pressure fluid when the gate is open. The safety gate valve is designed as a pilot-controlled seated valve with a
Digital measured value acquisition
As almost all measured variables in fluid technology change in an analogue manner, they must first be divided up into equal size sections (steps) for digital measured value acquisition. This action can
Piston type accumulator
Hydraulic accumulator with a free-moving piston as a separator between gas and hydraulic fluid (Figure K 19) . Since there is no separating wall made of rubber, the fatigue resistance is greater than for
Inlet pressure
device or a system (DIN 24 312). Self-priming pumps generate a negative pressure during priming if the fluid feed height is not positive. Min. and max. inlet pressure are dependent on the type of pump. On h