An exhaust fan fitted with 900 mm diameter pulley is driven by a flat belt from a 30 kW, 950 rpm squirrel cage motor. The pulley on the motor shaft is 250 mm in diameter and the centre distance between the fan and motor is 2.25 m. The belt is 100 mm wide with a coefficient of friction of 0.25. If the allowable stress in the belt material is not to exceed 2 MPa, determine the necessary thickness of the belt and its total length. Take centrifugal force effect into consideration for density of belt being 950 kg/m³.

Residential Construction Academy: House Wiring (MindTap Course List)
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Author:Gregory W Fletcher
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Chapter4: Test And Measurement Instruments Used In Residential Wiring
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An exhaust fan fitted with 900 mm diameter pulley is driven by a flat
belt from a 30 kW, 950 rpm squirrel cage motor. The pulley on the
motor shaft is 250 mm in diameter and the centre distance between the
fan and motor is 2.25 m. The belt is 100 mm wide with a coefficient of
friction of 0.25. If the allowable stress in the belt material is not to
exceed 2 MPa, determine the necessary thickness of the belt and its
total length. Take centrifugal force effect into consideration for density
of belt being 950 kg/m³.
Transcribed Image Text:An exhaust fan fitted with 900 mm diameter pulley is driven by a flat belt from a 30 kW, 950 rpm squirrel cage motor. The pulley on the motor shaft is 250 mm in diameter and the centre distance between the fan and motor is 2.25 m. The belt is 100 mm wide with a coefficient of friction of 0.25. If the allowable stress in the belt material is not to exceed 2 MPa, determine the necessary thickness of the belt and its total length. Take centrifugal force effect into consideration for density of belt being 950 kg/m³.
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