Unit 3 Clutches, Brakes and Dynamometers

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Presentation transcript:

Unit 3 Clutches, Brakes and Dynamometers Theory of Machines I Unit 3 Clutches, Brakes and Dynamometers

Dynamometers A Dynamometer is a brake but in addition, it has a device to measure frictional resistance. Knowing the frictional resistance, we may obtain the torque transmitted and hence the power of the engine.

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Absorption Dynamometer In the Absorption dynamometers, the entire energy or power produced by the engine is absorbed by the friction resistances of the brake and it is transformed into heat, during the process of measurement. Used for measurement of moderate powers only. Transmission Dynamometer In the Transmission dynamometers, the energy is not wasted in friction but is used for doing work. The energy or power produced by the engine is transmitted through dynamometer to some other machines where power developed is suitably measured.

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer 2. Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Prony brake dynamometer

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer 2. Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Rope brake dynamometer

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer 2. Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Belt transmission / Froude / Throneycroft dynamometer

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer 2. Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Epicyclic-train dynamometer

Types of Dynamometers Absorption Dynamometer i) Prony brake dynamometer ii) Rope brake dynamometer 2. Transmission Dynamometer i) Belt transmission dynamometer ii) Epicyclic dynamometer iii) Torsion Dynamometer

Torsion dynamometer

Bevis-Gibson Flash Light Torsion dynamometer