Ajay Verma, Piyush Pradhan*, Alok Kumar Mishra and Manisha Sahu
Department of Farm Machinery and Power Engineering SVCAET&RS faculty of Agricultural Engineering, IGKV Raipur, Chhattisgarh, 492012, India
Email:ajayaverma@rediffmail.com
Received-20.04.2017, Revised-12.05.2017
Abstract: A pneumatic metering mechanism for planting of different seed was developed forprecise planting for groundnut, cotton, okra, sesameseeds. Centrifugal aspirator with radial blade was designed for creating the required vacuum pressure that pressure is required to pick the single seed. The optimum vaccume pressure was found to be 5, 2, 2 and 0.3 kPa for groundnut, cotton, okra, and sunflower. The airflow velocity 3.3 m/s gave the best results, with minimum lateral displacement of the seed. Effect of the different shapes of the seed plate orifice, upon the pneumatic planting of different shaped was analyzed which showed that the proper orifice shape was circular for spherical seed and elliptical for longer and flatter seed. The dimension of the seed plate orifice was 3mm diameter circular plate for okra seed, where as for groundnut, cotton and sesame seed, the elliptical shaped orifice with dimension (5,4.5), (3,3.5),(2.24,0.80) mm longer and shorter axis gave best result. The sizes of the different shaped orifices were analyzed to the effect of seed box exposed area upon the seed picked per orifices. The result for all shaped orifices clearly indicated that the meeting rate increases with the increase in the seed exposed area.
Keywords:Pneumatic metering mechanism, Orifice plate,Centrifugal aspirator, Vacuum pressure
REFERENCES
Yazgi Arzu, Adnan Degirmencioglu (2007). Optimisation of the seed spacing uniformity performance of a vacuum-type precision seeder using response surface methodology. 9 7,347 – 356
Ozmerzi, A., Karayel, D., Topakci,M. (2002). Effect of Sowing Depth on Precision Seeder Uniformity. 82 (2), 227–230
Gaikwad, B.B., Sirohi,N.P.S. (2008).Design of a low-cost pneumatic seeder fornursery plug trays, 99 (200 8) 322 – 329
Karayel1, D., Barut, Z.B., Ozmerzi, A. (2004). Mathematical Modelling of Vacuum Pressure on a Precision Seeder. 87(4), 437–444
Karayel,D. (2009). Performance of a modified precision vacuum seeder for no-till sowing of maize and soybean. 104,121–125
Singh,R.C., Singh, G.,Saraswat,D.C. (2005). Optimisation of Design and Operational Parameters of a Pneumatic Seed Metering Device for Planting Cottonseeds. 92 (4), 429–438
Kamgar, S., Noei-Khodabadi, F., Shafaei,S.M.(2015). Design, development and field assessment of a controlled seed metering unit to be used in grain drills for direct seeding of wheat, Department of Biosystems Engineering, College of Agriculture, Shiraz University, Shiraz 71441-65186, Iran.
Singh, V.V.(2001). Pneumatic planter for commercial operation. In: Proceedings of National Symposium on Cotton Mechanism, held at Bhopal, March, 23-24, 2001, pp: 70-73
Kumaran, G.S. and Kumare, V.J.F. (2004). Design and development of a vaccume precision planter .i 38th ISAE annual convention,Dapoli,pp79-83
Kachru, P.P., Gupta, R.K. and Alam, A. (1994).Physio-chemical Constitutuents of Food Crops 1st Edition,Scientifi Publications,Jodhpur p-56
Pandya and Shay (1983). Elements Of Machine Design.Charotar Publications House, Anand.p325
Short, T.H. and Hubber, S.G. (1970).The Development of A Planetary Vacuum Seed Metering.Trans.ASAE,27(1),688-696