The performance of typical failure failures of gearboxes

Through the analysis of the actual application of the gearbox, it is not difficult to determine its failure. The entire gearbox system includes components such as bearings, gears, transmission shafts and box structures. As a commonly used mechanical power system, it is very prone to failures of mechanical parts while it is continuously moving, especially bearings, gears and transmissions. For these three parts of the shaft, the probability of failure of other parts is significantly lower than them.

When the gear performs its task, it lacks the ability to work due to the influence of various complex factors, and the value of the functional parameter exceeds the maximum allowable critical value, which is a typical gearbox failure. Its manifestations are also varied. Looking at the overall situation, it is mainly divided into two categories: the first is that the gears are gradually generated in the accumulated rotation of the gear box, because the outer surface of the gear box is in the process of bearing a relatively large load, the gears meshing with each other. There will be relative rolling force and sliding force in the gap. The frictional force during sliding is just opposite to the direction of the pole ends. Over time, long-term mechanical operation will cause the gear to be glued, cracks will appear, and the degree of wear will increase, and the gear fracture will become Certainly. Another type of failure is due to the staff being unfamiliar with the safe operation process or violating the operating specifications and requirements, negligent installation of gears, or hidden dangers for the occurrence of failures in the initial manufacturing. This failure is often caused by The inner hole and the outer circle of the gear are not on the same circle center, and there are errors in the shape and asymmetric distribution of the axes when the gears are meshed with each other.

In addition, in each accessory of the gearbox, the shaft is also a part that is prone to failure. When there is a relatively large load impacting the shaft, the shaft will deform rapidly, which directly induces this failure of the gearbox. When diagnosing the fault of the gearbox, the effect of the shafts with different degrees of deformation on the fault of the gearbox is inconsistent. Of course, there will be different fault performances. Therefore, the distortion of the shaft is also divided into severe and mild. . The unbalance of the shaft will lead to failures for the following reasons: working under a heavy load environment, deformation over time is inevitable; the shaft itself exposes a series of defects in many technological processes such as production, manufacturing and processing, resulting in newly cast The shaft will be severely out of balance.