When the disc harrow is operating, the harrow group should form a certain angle with the advancing direction, which is called the declination angle. The declination angle is large, the soil penetration is deep, and the soil crushing ability is enhanced. Therefore, various disc harrows are equipped with angle adjustment mechanisms. The adjustment range varies with the diameter of the harrow blades, generally 0-20 degrees. It should be noted here that when the disc plow is working, there is also an inclination angle in addition to the declination angle, while the disc harrow only needs one declination angle when it is working. In addition, the depth of penetration of the disc harrow is also related to its weight, so a weighted disc is installed on the harrow group, and the method of weighting can also be used to increase the depth of penetration.
The working resistance of the disc harrow per meter width is related to the ploughing depth, soil specific resistance, land conditions and operating speed. A heavy-duty disc harrow with a blade diameter of 660 mm has a working resistance of 6 to 8 kN per meter width under normal soil conditions and a ploughing depth of 12 to 18 cm. According to the analysis and calculation of comprehensive factors such as the power of the tractor, the working resistance of the machine tool, the longitudinal stability of the unit, and the transportation requirements, the working width of the machine is determined to be 6.3m.Disc Harrow
