p*D Nm Torque(T) 20*π -...
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Transcript of p*D Nm Torque(T) 20*π -...
Pressure Pressure …… Relation to TorqueRelation to Torque
π
π π
=
=
=
=
⇒ = =
o
o
1S
RotationalPower,Watts : P Torque Angular Velocity
where :T Torque,Nm
Angular Velocity,
Re volutionsper minute
watts kW
N260
N2 N 2 N TP T, ,
60 60000
i
i i
i i i i ii
where...p = pressure,barsD = displacement,cc/revn
HHydraulicPower,kW
pressureatpump,bars
flow rateof oil,lpm
pumpshaft rpm,rpmcc
pumpdisplacement,revolution
p Q: P600
where :p
D NQ1000
N
D
=
=
= =
=
=
i
i
Relation of pressure to Torque at the pump shaft
Torque(T) p*D20*π
= Nm
Simplifying by equating =o HP P
