Abstract
The self-propelled multipurpose power unit was developed in the laboratory of Farm Machinery and Power Engineering, JNKVV, Jabalpur for small farmers. The prime mower is powered by a 5hp diesel engine. The V-belt drive is provided for the transmission of power from the engine to the traction wheels. An adjustable accelerator wire is connected to the governor for adjusting the engine speed according to the requirement. The worm gear reduction unit is located at the axle having a speed reduction ratio of 20:1. A telescopic type frame is provided to support the end of the adjustable output shaft with the help of a bearing. The handle is modified to vary the height from 1.0 to 1.3 m from the ground. The additional lug cage wheel is connected to the transport wheel to increase the traction. Noise and Vibration isolators are provided between the engine and chassis to reduce the noise level and vibration. The noise level of the power unit was suitable for 8 working hr. The range of noise with load conditions is 60, 65, 70 (dB) and without load conditions 74, 79, 86 (dB), this limit of noise is under the permissible limit 90db. Vibration range according to optimum rpm 1200, rated rpm 1500 and maximum rpm 1800 so the output range of vibration in Handle 130 μm and chassis 217 μm, Handle 127 μm and chassis 198 μm, Handle 121 μm and chassis 193 μm.
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