In the grinding process of Raymond mill, failure of gear transmission is one of the frequent problems. Once the Raymond mill gear transmission fails, it will seriously affect the grinding production and delay the efficiency of the whole production plant. What are the reasons about failure of Raymond mill gear transmission?
1. In the working process of Raymond mill, the working environment of gear transmission is poor, and the gear is serious polluted because of the serious influence of dust particles. In addition, the lubricating oil of the gear transmission part is not added in time, the lubricating oil is seriously polluted, etc., will both cause the failure of Raymond mill gear transmission.
2. After a period of operation of the gear transmission, the axis of the pinion and the axis of Raymond mill classification drum may become non-parallel, resulting in the local contact of gear mesh. If the gear is unevenly stressed across the entire tooth width, it is easy to cause bending and torsion deformation of the gear shaft. In addition, if the structure of the gear transmission material is uneven, there are slag inclusions, gas holes and hard particles, etc., the local shear stress of the surface or subsurface layer is too large, resulting in the failure of gear teeth.
3. There is stress concentration on the gear of Raymond mill. When the tooth tip of the gear enters meshing state, initial cracks are formed in the surface layer under the action of excessive equivalent contact shear stress. During the operation process of gear, the high pressure oil wave generated by contact pressure enters the crack at a high speed, and has a strong fluid impact on the crack wall. At the same time, the surface of the gear pair can close the crack opening, so that the oil pressure in the crack further increases, and forces the crack to expand in the direction of depth and tooth surface, and the material falls off from the tooth surface, forming pitting corrosion.
4. In the transmission, the time for the single tooth of the gear pair to bear the load is greatly extended, which is an important reason for the rapid wear of the gear. The decrease of the coincidence degree will inevitably lead to the increase of the gear backlash, so that some impurities, floating objects and dust in the air are easier to enter between the meshing surfaces of the gear pair, causing abrasive wear.