Diesel effect
quickly that even self-ignition of the air-gas mixture can occur. As a consequence a very large increase in pressure and temperature occurs locally that can also damage seals as well as cause accelerated ageing
Working cycle
running through the intended program once. The individual steps can be triggered manually or by a suitable program. Restarting a working cycle can also be initiated manually or by a program ( operating modes
Analogue
first variable. The relationship between these two variables can be linear, but does not have to be linear. Basic feature: An analogue signal can take any magnitude within the range between the limits.
Single edge control
resistances. With the single edge control one resistance can change, the second resistance is however constant (Figure E 7) . Single edge controls can be in the bypass or in the main flow. Application examples:
Hydrostatic laws
Bernoulli, 1700—1782). The total energy content of a flowing fluid remains the same. From this law it can be derived that the sum of the static pressure and dynamic pressure is constant: This means that in [...] places of high flow velocity the static pressure drops such that air separation or even cavitation can occur. Orifice law : This law defines the outlet velocity of a flow from a chamber or a pipe that is [...] velocity, causes reaction forces. On the actuation of directional valves with a spool this situation can result in undesirable incorrect switching. In addition, there is of course also the behaviour of technical
Seated valve
Check valve . The ball prevents return flow of the fluid. As spring-loaded versions, this valve type can also be used as a Pressure-limiting valve or as a self-actuating seal. This protects a pressure system [...] pressure. Disc-seated valves ( c ) also known as poppet valves, have a disc-shaped sealing element, which can easily be created in duplicate, resulting in a 3/2 directional valve. They are sealed at normal pipe [...] hydraulics as: Check valve Pressure-limiting valve 2/2, 3/2, 4/2 and 4/3 directional valves . These can also be combined in an extremely compact fashion as a valve bank and flange-mounted directly on power
Propagation of error
measured result is a function of one or more measured values , then the error on the measured result can be determined based on the law of error propagation . It describes the propagation of the measurement [...] form of covariance matrices as an indirect measure of the uncertainty. More detail on this aspect can be found in DIN 1319 Part 3 and VDI/VDE 2620 Part 1.
Absolute pressure transducer
Pressure transducer that can measure the absolute pressure . For this purpose the side opposite the pressure to be measured is hermetically sealed as a reference chamber (e.g. with a glass plate or glass [...] glass bushing). The reference pressure defined in this manner in the chamber can be a vacuum, but is not necessarily a vacuum. It is sufficient if the pressure is stable. The referencing of the measured
Single acting cylinder
pressure for the forward stroke only acts in one and the same direction ( ISO 1219-1 ). The piston can be returned by a spring, the inherent weight of the piston or external force. In principle, single-acting [...] effective piston area. Single acting cylinders are mostly equipped with plunger pistons . However they can also be formed by the single sided application of pressure to a differential piston .
Drag flow pressure
Pressure, which builds up under certain constraints in front of a piston rod seal and which can reach several times the nominal pressure of the system. The drag flow pressure is caused by the drag flow [...] the sealing chamber ( Figure S 29 ). The best remedy is a spiral-shaped nut in the guide bush, which can remove the scraped off oil volume without pressure.