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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

occurs, either the hydraulic fluid must be fed to the pump (pump under the tank) or it must be supplied with pressure (charge pump)

from the source of the noise increases, therefore the measuring distance must always be stated along with the noise level (for humans: normally 1 m). In practice, calculating the noise level of a deployed

vane can make two or more strokes during one revolution ( multi-stroke hydrostatic pumps/motors ). With this design, the shaft load is compensated for, but it cannot be made adjustable.

density: In hydraulics kinematic viscosity is the usual parameter for viscosity. This parameter changes with the temperature of the hydraulic fluid. ν was previously given in degrees Engler (°E), and then in

ing form of oscillation is referred to as a wave. Inside pipes, given the small diameter compared with the relevant wavelengths, it can be assumed there will be some one-dimensional propagation of oscillation

detachable. Pressed or crimped connections, which cannot be used again, as both parts are pressed together with the hose. Today, these are widely used ( Figure S 26 ).

greater the stiction and sliding friction. Therefore, to lower the limit to the stick slip, seals with very low friction are chosen before reaching the hydrostatic piston bearing (e.g. in the case of servo

relief surges which may arise as a result at high pressures and oil volumes, a releasable check valve with hydraulic release should be used.

flow rate through flow resistances, for example the following applies for orifice-shaped resistances with A = geometrically smallest flow cross-section, ρ = density of the pressure fluid p 1 - p 2 = pressure