Hydraulic Pump Motor Sizing
Motor size vs. flow rate, shaft torque, shaft power and hydraulic power.
Equations for hydraulic pumps:
Flow rate
Q = D n / 1000 (1)
where
Q = flow rate (l/min)
D = displacement of piston (cm 3 /rev)
n = revolutions (rpm)
- rev = revolution
- rpm = revolution per minute
Shaft Torque
T = D p / 20 π (2)
where
T = torque (Nm)
p = pressure (bar)
Shaft Power
P s = T n / 9554 (3)
where
P s = shaft power (kW)
Hydraulic Power
P h = Q p / 600 (4)
where
P h = hydraulic power (kW)
