Piston speeds hydraulic cylinder
29.3
Fig. 1
hydraulic cylinder
The movement speeds can be divided into the forward speed v A for the actual working stroke and the return speed v R. The number of cylinders n is taken into account in the equations for the effective surfaces. The driving speeds v A and v R result in the following relationship:126787
Eqn. 1
Eqn. 2
| Preliminary in the working stroke | vA | = | mm/sek | ||
| Rewind speed | vR | = | mm/sek |
| Theoretical flow rate | QPth | = | l/min | |||
| Volumetric efficiency pump | ηPvol | = | ||||
| Volumetric Efficiency Piston | ηKvol | = | ||||
| Number | n | = | ||||
| Piston diameter | dK | = | mm | |||
| Rod diameter | dS | = | mm |
Calc 1
piston speeds
The efficiencies η Kvol for pistons can be found in.87 A working cylinder with mechanical seal has a piston efficiency of 0.96 … 0.98. The volumetric efficiency of an internal gear pump is 0.95 after87.
12
Tschätsch, H. / Praxis der Umformtechnik / Vieweg / Wiesbaden / 2003 / 7. Auflage
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Wagener, H.-W., Pahl, K.-J. / Mechanische und hydraulische Pressen / VDI Verlag / Düsseldorf / 1992 / …
87
Findeisen, D.; Helduser, S. / Ölhydraulik / Springer Vieweg / Berlin / 2015 / 6. Auflage