Development of a vibratory subsoiler | |
| Author | Rattana Karoonboonyanan |
| Call Number | AIT Diss. no.AE-09-01 |
| Subject(s) | Agricultural machinery Vibrators |
| Note | ā¸¤ dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Agricultural Systems and Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. AE-09-01 |
| Abstract | This study was aimed to evaluate and modify vibratory subsoilers to reduce seat vibrations and draft force per unit soil failure area. The single- and double-shank subsoilers vibrated in the longitudinal-vertical plane through a four-bar mechanism. The tine was 400 mm long, with a cutting edge of 70 mm wide, the lift angle of 30 degree and the oscillating amplitude of 36 mm. Distance between the two shanks of the double-shank was 900 mm. The subsoiler was powered through a p.T.a. at 540 rpm of a 4-wheel 61-kW tractor. Experiments showed that the vibrations at the oscillating frequency were transferred from the implement to the operator seat. Compared with the single-shank subsoiler, the doubleshank subsoiler had significantly lower vibrations at the operator seat. The double-shank subsoiler was modified by installing a pair of gas-damping coil spring vibration isolators at the top of implement frame to attenuate the vibration transferred from the implement to the operator seat. Experiments showed that the modification of double-shank subsoiler in vibrating mode reduced the draft force per unit soil failure area and per unit operating depth by 56% and 18% respectively and total power per unit soil failure area and per unit operating depth by 57% and 21 % respectively, at the traveling speed of 2.8 km/h (a = 2.5). And in transverse direction, the vibration at implement was found reduced by 87%. The vibrations at the operator seat in transverse and vertical directions were within 8-h fdp boundary for the modified double-shank subsoiler in both vibrating and non-vibrating conditions at the tractor speed of 2.1 and 2.8 km/h, compared to the original machine of which the vibration was within 2.5-h fdp boundary in transverse direction. Among various conditions compared to the original double-shank subsoiler, the modified machine in vibrating mode at the traveling speed of 2.8 km/h had reduced draft and total power per unit operating depth and per unit soil failure area, and tractor seat vibration was within ride comfortable range |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. AE-09-01 |
| Type | Dissertation |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Salokhe, Vilas M.;Tanya Niyamapa; |
| Examination Committee(s) | Jayasuriya, Hemantha P. W.;Athapol Noomhormā¸§Soni, Peeyush;Kondo, Naoshi; |
| Scholarship Donor(s) | RTG Fellowship; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2009 |