Loop gain V K
associated with the individual elements (, controlled subsystem , measuring device) in the open control circuit. It is a dimensionless variable and does not apply to control circuits with an integrating
Main valve
(Opposite of pilot valve). With pilot-controlled valves, the main valve is the actual working valve actuated by the pilot valve .
Filtration
To remove particles of dirt that the pressure fluid is carrying with the aid of filtration of a wide range of types.
Fixed displacement motor
Hydraulic motor with constant displacement . Its variable rotation speed is determined solely by the (variable) pump or an upstream flow valve.
Inhibitor
delays certain reactions in hydraulic fluids . It is used most commonly to counter processes associated with ageing and corrosion.
Wheel motor
cardan shaft and differential gear. In addition, either high speed motors with a reducing gear; either conventional hydraulic motors with connected reducing gears are used or designs, in which the hydraulic [...] also be adjustable – is integrated into the gear such that the torque is transferred over a ring gear with teeth on the inside, onto which the rim is directly welded ( Figure R 7 ). Slow speed high torque
Initial pressure difference ΔpA of filters
information on the dirt holding capacity of a filter is necessary, as a filter with a low ΔpA can clog quicker than a filter with a higher ΔpA (see filter life ). [...] the magnitude of the flow rate flowing through the filter. The dirt holding capacity of a filter and with it the pressure difference of a filter have upper limits. Both are higher the smaller the initial
Slow speed high torque motor
deliver a torque level in keeping with the speed (up to 100,000 Nm and more). Slow speed high torque motors, despite their relatively large size, are associated with very low inertia torque, very good [...] good starting performance and very high efficiency ( Figure L 7 ). Alternative: high speed motor with transmission.
SAE flange
In hydraulics, four-hole flanges with the connection pattern standardised in SAE j 518 ( Figure S 1 ) are the most commonly used flange connections . The American SAE norm specifies two pressure stages [...] stages 3,000/6,000 PSI (210/420 bar), nominal widths of 15 to 50 and fastening screws with UNC threads. The SAE flange can be used as a two-part flange to connect pipelines to non-split counterfaces or as a [...] ISO 6162 includes both flanges for metric fastening screws (series I) and those for fastening screws with UNC threads (series II).
Tachogenerator
rotation speeds. Disadvantage: The collector with brushes requires regular maintenance. AC generator : A rotor equipped with a permanent magnet turns within a stator with an electromagnet. In doing so, a sinusoidal