H3-FH8A flender brake rectifier Helical gear box H3

Flender/Flender Gear Units/Helical gear box H3

equired to cut at the 1-cm height of plant. Halyk and Hurlbut ( observedthe shear strength of alfalfa stem internodes between 4.0 and 1.5 kg/cm 2, and it de- creased with the increase in moisture content at all heights. Liljedahl et al. ( established the effect of moisture content of forage stalks from 8 to 7% (wb) on specic energy and observed the highest cutting energy at moisture content of 3%. Similar investiga-tions by Chancellor ( and Datta et al. ( also found the maximum cutting force at moisture content of 3% for forage stalks. Chancellor ( found that at the cuttingspeed of 2.5 cm/, the shear blade with 2 -bevel angle were the most efcient in cutting alfalfa stem, and the energy required for cutting group of stems ranged between0.4 and 2.4 hp- per ton of dry matter to cut into 1.5-mm lengths. Prasad and Gupta ( also observed the minimum-cutting energy per unit area and cutting stress of maize stalks (7.6%) for shear blade with 2 -bevel angle. Datta et al. ( determined the dynamic shear stress of different forage crops, including paddy straw using ywheel typeensilage cutter operated by an induction motor and utilized the relation given by Eq. (: /H1.1( P1/H1Pn) RcAs( where, Sd/H1dynamic shear stress (kg/cm; P1andPn/H1average instantaneous power at load and at no-load respectively (); Rc/H1distance of the center of throat from the center of rotation (); As/H1cross-sectional area of stalks under shear (cm; /H1angular velocity of knife (rad/). It was reported ( that the dynamic shear stress ranged between 0.1 and 0.2 kg/cm2(8.5% .. db) for paddy and 0.1 and 0.1 kg/cm2(7% .. db) for jowar, 6 Datta and decreased linearly with an increase in knife velocity beyond 2.7 /. Furthermore, increase in moisture content increased dynamic shear stress exponentially for paddy straw.Therefore, it was recommended to cut green fodder at high-moisture content and at anangular velocity of 2.7 / or more. 2.4 Harvesting Hand Tools Harvesting of eld cr