Kinematical viscosity v
degrees Engler (°E), and then in stokes or centistokes (cSt), but is now given in m 2 /s or mm 2 /s. cSt can be converted as follows: 1 cSt = 1 mm 2 /s
Velocity control
undertaken by changing the flow rate to the load. For this purpose a control with throttle is used that can remove the flow rate not required out of the circuit via flow valves ( throttle valve , 2 or 3-way
Stick slip
the seals used — is a determining variable. The smaller it is, the smaller the velocity, at which it can still run smoothly. As the friction also depends on the pressure, that too is an influencing factor:
Pipe screw connections
most common type of fitting, but can become problematic in the case of strong impacts or oscillations. Cutting ring fittings are preferred for metal pipes. However, they can also be used for plastic pipes [...] sides to connect the pipes to one another. Swivel fittings These are elbow fittings, in which you can select the outlet direction before the fitting is tightened ( Figure R 29 ). In terms of construction
Servo valve
of its dynamic properties. Therefore, frequencies over 150 Hz can be expected from a servo valve today at a damping of 0.6. However, that can only be achieved with extremely short control distances of a [...] by a two-stage servo valve ( Figure S 51 ). This means that overall gains of up to a factor of 108 can be achieved. The servo valve and its qualities largely determine the behaviour of the drive. That is
Scraper
Valve that can shut-off the flow in both directions. In fluid technology this valve is implemented in then form of a seated or ball valve. One of the most important sources of contamination in hydraulic
Creeping motion
reduction in velocity by pivoting back the traction drive pump at full rotation speed. Creeping motion can act on the brake if the creep pedal is used to cancel the brake pressure (again via the pivoting angle
Series connection
to bolt them together as required. It ends with two end plates ( Figure L 3 ). A series connection can be combined as required — for example, by inserting a plate with throttle valves or — with a parallel
Algorithm
General : Specification or process that follows a specific scheme and that solves a problem. This can be a mathematical formula, a flow diagram or a program. In control technology : Algorithm is used to
Flushing a system
The flushing takes place at a low pressure. Here the filters are to be carefully monitored, as they can become blocked quickly under certain circumstances. Sensitive devices, such as servo valves should