Orbit motor
motor whereby the outer ring with its seven teeth remains still, while the inner wheel with its six teeth performs a planetary-type movement. As a result, a volume associated with 6 → 7 = 42 gaps between teeth
Replacement orifice diameter
orifice diameter is calculated with For parallel configuration the replacement orifice diameter is calculated with Calculate the replacement orifice diameter directly and easily in our hydraulic calculator [...] For two orifices with diameters d1 and d2 which are connected in parallel or in sequential, the diameter dE of a replacement orifice can be calculated. For sequential configuration the replacement orifice
Multi-circuit pump
separate circuits with a pressure-limiting valve because their working cycles overlap. If a constant pump is involved, the installed power will be equal to the total for the corner power . With variable pumps [...] pumps , it is possible to make better use of power from pumps operated simultaneously with the help of a sum power controller or limit load control .
Single or separate drive for machines
Every machine or even every cylinder , provided its movements overlap with others, has a dedicated pump with a size based on the highest load speed v k required (Figure E 13) . This means that high speeds [...] constant pumps with Q k it is a disadvantage that the installed power P max is only required at one operating point (at p max , i.e. at corner power ). If, on the other hand, variable pumps with power controllers
Null bias
66 257). With continuously adjustable valves : Shifting of the zero point as a result of changes in operating or environmental conditions or as a result of some long-term effect associated with the input [...] With machine controls : The option to shift the origin for a coordinate axis in the control to a specified point. The position for the machine zero point remains stored in the control regardless of the [...] The term null bias is understood to mean the correction of a measuring curve so its origin coincides with the origin for the coordinates.
Impressed flow
The flow rate in a hydraulic system with a variable pump and appropriate adjustment corresponds to the requirements in accordance with which the adjustment functions. The term impressed, i.e. pre-defined [...] term " constant flow system " often used is not correct here, as the flow is not constant. The system with impressed flow is also termed a "(constant) flow source".
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 [...] these two characteristics. Above all, they favour the widespread use of gap seals , including those with short seal lengths, which means the components used in oil hydraulics can be designed to be relatively
Secondary adjustment of hydrostatic transmissions
A hydrostatic transmission with secondary adjustment works with an impressed flow ( constant current network ) and has a constant pump and a variable motor, which performs the torque setting itself. This [...] an increasing rotation speed and –– theoretically –– a constant output (this should not be confused with secondary control !) ( Figure S 44 ).
Silencer
working primarily with reflective silencers with an expansion chamber, in which the primary sound wave is extinguished by a second wave of the same amplitude and frequency, but with a phase position shifted [...] reduces the pressure (pulsation) fluctuations and therefore reduces the noise produced in connection with this, without preventing the transport of the fluid. In hydraulics : The silencer is intended to reduce
Measuring range
(VDI 2600). As far measuring instruments with displays are concerned, the measuring range only covers the part of the scale which makes it possible to comply with the error limit defined by the class of [...] values for the input signal from a measuring instrument (the measured variable ) which in accordance with the characteristic curve for this measuring instrument is unique and formed within specified error [...] the basis of values for the output signal . Measuring instruments may have several measuring ranges with different error limits. A device for changing the measuring range (e.g. measuring range converter)