Action of multiple resistance
As with electrics, a distinction is made in fluid technology between series and parallel resistances. For series circuits - as is the case for pipelines - the individual resistances are added ( series
O-ring seal
Circular ring with an almost perfectly round cross section which is mainly used in fluids technology to seal machine parts when at rest ( Figure O 11 ). Its sealing action is achieved through axial or
Filtration efficiency in general
Ability of a filter to retain specific test contamination in a hydraulic fluid with a specified contamination concentration under defined test conditions (CETOP RP 100). As the test method for filtration
Ramp
feedback control technology as a test function to determine the transfer behaviour of a system (). In >fluid technology, ramps are primarily integrated in the activation of> proportional valves in order to adapt
Velocity of sound pressure waves
Velocity of the transmission of pressure in a fluid (speed of sound). It is dependent on the bulk modulus K of the medium and its density ρ: In air in the normal state it is 333 m/s. In mineral oil it
Digital measured signal
digital signal processing is increasingly dominant, because the majority of measuring procedures in fluid technology are analogue, it is necessary to use an A/D converter .
Double acting cylinder
The cylinders have two line connections that are separate from each other. By feeding the hydraulic fluid through the two connections, the piston can transfer tensile and compressive forces in both stroke
Filter in main conduit
secondary flow (f), as the separate circuit is selected in which a separate filter pump presses the fluid through the filter and mostly also through an oil cooler, independently of the working cycle. See
Flapper-nozzle system
flapper are firmly connected together and are supported by a thin-walled flexible tube. Hydraulic fluid flows continuously from Ps through the two fixed throttles to the nozzles; through the nozzles to
Dissipated heat
power lost by a hydraulic system is converted into heat, which is largely absorbed by the pressure fluid . It is comprised of the pressure losses caused by pipe friction and flow deflections, leakage losses