| 摘要 |
FIELD: agriculture.SUBSTANCE: bedder planter comprises ridge formers fixed on frame 4, drilling mechanisms, rollers 3. Ridgers 4 comprise a rack, lancet blade leg and an arm. Bracket is mounted on the rack. On the arm an adjustment disk with its axis is rigidly fixed. Located under the adjustment disc an additional disc rotatable about and its axis is installed. Adjustment and additional discs have holes arranged along its edges at equal distance from their centre. Under extra disc is rigidly fixed guide bracket with axle and blade. Blade is flat and is mounted on a half-axle to vary its position in height relative to rack along cutting edges lancet paws and attack angle in horizontal plane, and fixing in position. Blades of each pair of ridgers are mounted symmetrically with respect to line of seeds sown at an angleα, solution of which is directed towards movement raised bed planter. Angle α is determined by ratio of, where H - height of ridge of soil, m; γ - angle of repose of soil, deg; B - width of upper base of ridge of soil, m; r - radius of blade, m; π= 3.14; θ - blade contact angle with ground, deg; h - depth of immersion into soil heap, m; and distance L between vertical axis of symmetry of dumps is given by, where g - acceleration of gravity, m/s; v - velocity of raised bed planter, m/s; α - angle of attack of blade, deg; β = arctgƒ; ƒ - coefficient of friction of soil on blade; ε - angle between field and direction of surface of soil drop, deg. Packer rollers comprise a frame, spherical discs 25, packer rings 29, axis 28, bar 30 with spring 31 and arranged for ridgers 4.EFFECT: higher quality of sowing of tilled crops and formation of soil ridges above sown seeds.1 cl, 5 dwg |
