Dynamometer and Types of Dynamometers - Theory of Machine

Описание: Dynamometer
A dynamometer or "dyno" for short, is a device for measuring force, torque, or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (RPM).
A dynamometer can also be used to determine the torque and power required to operate a driven machine such as a pump. In that case, a motoring or driving dynamometer is used. A dynamometer that is designed to be driven is called an absorption or passive dynamometer. A dynamometer that can either drive or absorb is called a universal or active dynamometer.

1) Power Absorption Dynamometers:
Power Absorption dynamometers measure and absorb the power output of the engine to which they are coupled. The power absorbed is usualy dissipated as heat by some means.
Examples of power absorption dynamometers are Prony brake dynamometer, Rope brake dynamometer, Eddy current dynamometer, Hydraulic dynamometer, etc.

2) Power Transmission Dynamometers:
In power transmission dynamometers the power is transmitted to the load coupled to the engine after it is indicated on some type of scale. These are also called torque meters.

3) Driving Type Dynometer
A dyno that can measure torque and power delivered by the power train of a vehicle directly from the drive wheel or wheels (without removing the engine from the frame of the vehicle), is known as a chassis dyno. Dynamometers can also be classified by the type of absorption unit or absorber/driver that they use.

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