Suction Cup Vacuum
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Suction Cup Vacuum
How to calculate Vacuum Force?
Hi, if I have a suction cup of 10mm dia, connected to vacuum pump. the pump able to set to 0.1torr, 0.01torr. what is the suction force(kg) at 0.1torr & 0.01torr.
Technically there is no vacuum force. What you have is a lack of pressure on the vacuum side, opposing atmospheric pressure on the other side.
This differential force is the differential pressure times area.
Atmospheric pressure is 101,325 Pascals. One torr is 1/760 of an atmosphere.
For the suction cup,
Area = pi*D^2/4 = 0.25*pi*10^-6m^2.
DeltaPressure1 = (1 - 1/760*.1) atmospheres
DeltaPressure2 = (1 - 1/760*.01) atmospheres
Then, F = DeltaPressure * area
Force will be in Newtons, as Pascal = N/m^2. kg is a unit of mass, not force. SI does not recognize gravimetric units, so don't do kgf. But, if you insist, you can find conversion factor from N to kgf.
Force is about the same for both; that is why we don't bother with hard vacuum for suction applications.
VTEC / VMECA - Cartoning (Packaging) Machine with Vacuum Pump (suction cup,vacuum cup,ejector)