Using Technology of Disc Harrow
Release time:
2022-06-08 10:16
Source:
Disc harrow is one of the important products of mechanized protection farming. Pan harrow can reduce soil erosion, cultivate fertility, protect environment and resources, through shallow tillage and stubble. After the straw is crushed, it is mainly used in large plain farms, and the residue and mulch can be treated with disc harrows.
Disc harrow check technical status:
(1) Disc harrow For the same rake group rake, the position of the blade should be on the same straight line, and the deviation should be less than 5mm. Each edge shall be parallel to each other and the degree of greater non-parallelism shall not exceed 10mm. The disc spacing should be equal and the deviation should be less than 8mm.
(2) The cutting edge is sharp and not deformed, the thickness of the cutting edge is not more than 0.4mm, the length of the inclined surface of the cutting edge is 8~10mm, and the cutting edge angle is 15~20 °. If the cutting edge is defective, the depth of the defect should be less than 15mm, the length should be less than 15mm, and the defects on the rake should not exceed 3.
(3) The disc rake shall be installed above the concave surface of the disc and fixed on the rake frame with nuts. The position of the soil scraping plate can be adjusted. There should be appropriate clearance between the disc. In general, the upper gap is 10~25mm, and the lower gap is 3~10mm.
(4) The disc harrow group should rotate freely, the square shaft must not shake on the shaft, and the square shaft should be straight. The rake frame should not be deformed or welded, all connecting screws should be tightened, and the lubrication nozzle should be intact.
Adjustments:
(1) disc harrow depth adjustment. If the deviation angle increases, it will enter the soil depth and enhance the functions of piling soil, shoveling grass, crushing soil and turning soil. The deflection angle of the disc-shaped rake has a certain adjustment range to meet different soil conditions and operating requirements. When the soil moisture is high, the deviation angle should not be too large, otherwise it is easy to cause the rake clay and blockage.
Disc rake angle adjustment range is generally 14 ° ~ 23 °. Since the front row rake group works on the ground of the rear row of rake, in order to make the resistance of the front and rear rows of rake groups close to the same, the deflection angle of the rear row rake group should be greater than that of the front row rake group. In the operation of cohesive weight and dry soil, if the soil depth is not enough, it can be weighted on the harrow weight box, but no stone or iron can be added. The larger weight of the py-3.4 rake is 400kg, and the larger weight of other heavy gap rakes is usually 100kg. When weighting, the weight should be placed on the upward inclined end of the rake group. Since the working depth of the rake is limited by the diameter of the rake, the diameter of the rake is 1/6~1/4.
(2) the level of the horizontal adjustment of the disc harrow. Some rakes have a level adjustment mechanism to adjust the level of the rake frame. When the suspended rake does not have a horizontal adjustment mechanism, the vertical and horizontal level of the rake frame can also be adjusted by the upper pull rod and left and right lifting rods of the tractor. When more than two rakes are connected, the angle of the two rakes should be adjusted, and the frame should be horizontal to ensure that the depth of the front and rear rakes is consistent.
(3) vertical horizontal adjustment of disc harrow. The traction rake is adjusted by changing the suspension connection position on the rake frame. When the rake in the front row is deep and the rake in the rear row is shallow, the suspension position of the traction device on the rake frame should be reduced. On the contrary, the hanging connection position on the rake frame should be improved. The longitudinal horizontal adjustment of the suspended rake is carried out by changing the length of the upper tie rod of the suspension device. When the disc harrow is deep in the front row and shallow in the rear row, the upper pull rod should be adjusted; on the contrary, shorten the upper pull rod.
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