Shaft power是什麼意思

"Shaft power" is a term used in mechanical engineering, particularly in the context of rotating machinery such as turbines, electric motors, and generators. It refers to the power transmitted through a shaft, which is the rotating member that transfers torque from one component to another.

Shaft power is typically measured in units of horsepower (HP) or watts (W) and is the product of the torque (T) in Newton-meters (Nm) and the rotational speed (N) in revolutions per minute (RPM). The equation for shaft power is:

Shaft Power (P) = Torque (T) × Rotational Speed (N)

For example, if a shaft has a torque of 100 Nm and spins at 1,000 RPM, the shaft power would be:

P = 100 Nm × 1,000 RPM = 100,000 Watts or 100 HP (assuming 1 HP = 746 Watts)

Shaft power is an important parameter in the design and operation of machinery, as it determines the amount of work that can be done or the amount of energy that can be transferred from one part of a system to another.