Ride Vibrations on a 7·5 kW Rotary Power Tiller
✍ Scribed by C.R. Mehta; P.S. Tiwari; A.C. Varshney
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 387 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0021-8634
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✦ Synopsis
The power tiller has become a versatile power source for small and medium size farms in India owing to development of a variety of matching equipment .
In order to overcome the problem of drudgery involved in its operation , an operator's seat has been designed and developed . Power tiller ride vibration levels have been measured at man-seat interface along three mutually perpendicular axes viz ; longitudinal , lateral and vertical on four dif ferent terrains during the transport mode (with rotavator) and on three terrains during rotatilling . Measurements were taken at five throttle settings to obtain a range of engine speeds and corresponding forward speeds .
It was observed that equivalent acceleration levels increased as forward speed of travel increased under all operating conditions . Acceleration levels in the lateral axis were insignificant . There was no conclusive dif ference between measured acceleration levels on untilled and tilled fields during transport and rotatilling . The measured ride vibration levels under dif ferent operating conditions were compared with the values specified under ISO 2631 / 1 (1985) in relation to working ef ficiency and health and safety of the power tiller operator . On the basis of this study , it is concluded that exposure time for the power tiller operator should not exceed 2 и 5 h during rotatilling and 4 и 0 h during rotapuddling . Increasing exposure time may cause severe discomfort , pain and injury .