Product Description
The working principle of the disc harrow
The disc harrow is an agricultural machine with a set of discs (consisting of multiple concave discs fixed on a horizontal shaft) as its core working component. It is mainly used for loosening and crushing soil, weeding, stubble destruction, and shallow plowing after plowing. Its working principle can be summarized as follows:
1. Basic Structure and Movement Forms
Disk Harrow Blade Movement: The rotation plane of the disk harrow blade is perpendicular to the ground and forms an angle α (usually 10° to 25°) with the forward direction. During operation, the blade rolls forward under the traction force and the reaction force from the soil, simultaneously cutting into the soil.
Compound Movement: The movement of the blade can be decomposed into two parts:
Rolling (from point A to point B): The cutting edge crushes soil clods, grass roots, and crop residues.
Translation (from point B to point C): Through the concave surface, it pushes, turns over, and covers the crop residues.
2. Core Mechanism of Action
Soil Fragmentation and Turning: The spherical or conical concave surface design of the blade lifts the soil as it moves and then drops it, achieving the effect of loosening and partial turning.
Angle Adjustment:
Increasing the angle α: Enhances the depth of soil penetration, soil fragmentation, and turning ability, but increases resistance.
Decreasing the angle α: Suitable for wet and soft soil to avoid clogging or sticking.
3. Classification of Working Methods
Based on the angle between the direction of the harrow and the direction of plowing, there are three methods:
Straight Raking Method (Same Direction): Suitable for already broken soil, but prone to forming furrows;
Cross Raking Method (Perpendicular Direction): Strong soil breaking effect, but high resistance and more jolts for the machine;
Diagonal Raking Method (45° Angle): Best for both soil breaking and leveling, and the machine runs more smoothly.
4. Balance and Adaptability
Opposed Raking Group: Symmetrical design on both sides cancels out lateral forces, providing stable traction;
Offset Raking Group: Suitable for narrow spaces like orchards, allowing the tractor to operate off-center from the rake;
Environmental Friendliness: Compared to traditional plowing, disc harrows cause less soil structure damage, improving aeration and water retention.
Summary: Disc harrows achieve efficient soil breaking and inversion through angle adjustment and compound motion. Their design takes into account various soil conditions and agricultural needs, making them indispensable tools in modern farming.
A tillage implement with a working part composed of multiple concave circular discs fixed on a horizontal shaft. It is mainly used to loosen and break up the soil after ploughing to meet the agronomic requirements for pre-sowing land preparation. It can also be used for weeding or shallow tillage and stubble crushing on the stubble field after harvest. Heavy-duty disc harrows can also be used for land preparation.
The working principle of the disc harrow: The disc harrow is a commonly used agricultural tool for soil cultivation. Its working principle is to cultivate the soil by means of rotating discs. The design of the disc harrow is unique and it can perform various operations ranging from shallow ploughing to deep ploughing. The disc harrow is a soil preparation machine with concave discs arranged in groups as its working components. The cutting edge plane of the disc is perpendicular to the ground and has an adjustable angle with the direction of the machine's movement. Compared with the mouldboard plough, it requires less power and has a higher working efficiency.
Universal disc harrow: An efficient land preparation tool
The universal disc harrow is an efficient land preparation tool suitable for large-scale operations, including wasteland and cornfields. It is equipped with tractors of 90 horsepower or more, with a working width ranging from 2.5 meters to 12 meters and a depth of up to 15 centimeters. It features a compact design, a well-distributed center of gravity, anti-collision devices, and two rows of combing spring teeth to ensure smooth soil. Additionally, the disc harrow uses maintenance-free bearings, extending its service life and reducing maintenance requirements.
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