Analysis Of Afgricultural Machinery Tooth Gear Injury

　　Gear transmission has the characteristics of high transmission efficiency, compact structure, reliable operation and long service life, and is widely used in agricultural machinery. For example, the main drive gear of the drive axle of a wheeled tractor has a very heavy workload, and its common damage forms are tooth surface wear, tooth surface pitting and peeling, tooth surface adhesive wear and tooth breakage, etc. If the gear is damaged, it will affect the normal operation of the transmission, and even cause a major accident. Therefore, it is necessary to analyze the gear damage to remind the user to pay attention to the use method.

　　In the overhaul of agricultural machinery, the inspection of gears generally adopts the touch feeling method and the measuring tool measurement method. Fatigue spalling, cracking, and fracture are mostly inspected by visual inspection.

　　Wear is the main form of gear damage. After a long-term operation of the gear, the wear of the gear surface will gradually increase, and even the normal meshing marks and meshing gap of the gear will be destroyed;

　　Gear cracks are a wide range of defects or damage, including quenching cracks, grinding cracks and fatigue cracks;

　　There are various reasons for the fracture of gear teeth, which can be mainly divided into fatigue fracture, overload fracture and shear fracture;

　　Pitting refers to damage caused by the alternating stress on the surface or tooth surface exceeding the fatigue limit of the material. According to the degree of damage, it can be divided into initial pitting, destructive pitting and spalling. In severe cases, the peeling can be connected into one piece.

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