Grinding equipment Ball mill maintenance is very important for the ball mill. If some work is done improperly, it will cause great trouble to the ball mill. If the ball mill has the following conditions, it means the operator is not well maintained. Should give enough attention:
◆ Unreasonable maintenance program After the ball mill reducer is toothed, in order to quickly resume production, it is generally which shaft is used to change which shaft and gear, which cannot be run normally to ensure good meshing of new and old gears. An impact phenomenon occurs during operation, which makes the gear easier to break.
Corresponding measures: Optimization of maintenance scheme Since the online gear has been partially worn or partially failed, the new gear is not in contact with it. In order to ensure the normal meshing of the gears, it should be arranged in a set to fully run. By running the joint, the contact area of the gear teeth can be improved, the tooth surface smoothness and contact precision can be improved, the local stress can be eliminated, and the cold work hardened tooth surface layer can be formed, thereby improving the bearing capacity of the gear and prolonging the service life.
◆ Inaccurate measurement of gear parameters According to the analysis of assembly results, when the surveying and mapping gears are modified, the helix angle and modulus are not accurate, resulting in a large difference between the gear tooth profile and the old tooth. When the meshing is small, the impact is small, the impact is large, the stress at a certain point of the gear is too high, and the gear teeth are easily broken.
Corresponding measures: Correct the re-measurement of each gear parameter in the reducer, correct the helix angle and modulus of the gear teeth, ensure that the parameters of the gear are accurate, so as to accurately process, improve the gear coincidence and transmission stability, and thus improve the gear Carrying capacity.
◆The gear processing quality is poor. The high stress concentration of the root portion is rough, not a smooth transition, which aggravates the stress concentration effect; the material processing is poor, the grain flow line cannot be distributed along the tooth profile, and good comprehensive mechanical properties cannot be obtained; the gear is cantilever Loading, the root is equivalent to the fulcrum of the cantilever beam, the root portion is subjected to the maximum bending stress, and the crack will occur at the root.
Corresponding measures: Strictly control the quality of the design and manufacture the gears, pay attention to the importance of the root fillet, ensure a smooth transition, and not cause additional stress concentration; improve the manufacturing precision, so that the load distribution is uniform and the dynamic load coefficient is reduced; The gear material is changed from 45# steel to 42crmo. The grain flow lines are distributed along the tooth profile during processing to obtain good comprehensive mechanical properties.
◆The heat treatment process is not mature. The new gear tooth root is not quenched and strengthened, and the bending strength is low. The tooth surface quenching strengthening layer is too shallow to support the contact load for a long time, so it is crushed and deformed prematurely. Once the tooth profile accuracy is poor and the gap is increased, an additional load will be introduced.
Corresponding measures: Formulating a reasonable heat treatment process The bending resistance of the root is determined by the structure. By quenching and strengthening, the ability to resist bending deformation can be improved, thereby extending the life of the gear; to ensure that the gear can support the contact load for a long time, avoid premature compression. The additional deformation is introduced into the crushing deformation, and a reasonable thickness of the tooth surface hardening layer needs to be redesigned.
The problems of the ball mill reducer are also various, and it is helpful to quickly solve the problem of the ball mill reducer.
