Service Tel:0510-85251139
0510-85310583
Service Tel:0510-85251139
0510-85310583
Regularly changing the oil in the first oil change should be after the first 500 hours were put into operation, after the oil change intervals for each run 5,000-10,000 hours. During operation should pay attention to changes in oil cabinets, regular sampling tests, if the oil changes, and excessive oxidation products exceeds a certain percentage, it should be replaced.
Gearbox case every six months should overhaul, spare parts should be manufactured in accordance with the formal drawings, replaced with new spare parts after the gear box meshing gear shall comply with the technical conditions, and after commissioning and load test before official use.
Gearbox Common Faults and Preventive Measures
Troubleshooting gearbox gear damage, bearing damage, broken shaft and leakage of oil, higher oil temperature.
Gear Damage
Many factors gear damage, including material selection, design calculations, processing, heat treatment, installation, lubrication and maintenance and so on. Common gear tooth surface damage and injury tooth broken into two categories.
Tooth fracture (broken tooth)
Broken teeth often become progressively expanded from tiny cracks. According to crack the case and the reasons for broken teeth, broken teeth can be divided into overload fracture (including shock break), fatigue fracture and random breakage.
Overload always broken teeth due to the stress exceeds its limit stress, resulting in cracks rapid expansion, common causes of sudden impact overloading, bearing damage, shaft bending or larger hard object squeeze into engagement area. Radial fracture pattern has broken teeth crack propagation area, and sometimes the fracture smooth plastic deformation, fracture vice often split. Carefully check the material defects can be seen, the tooth surface accuracy is poor, not the root of the tooth for fine processing. We shall take the necessary measures in the design, give full consideration to prevent overload factor. When installing the cabinet to prevent deformation and prevent foreign matter from entering cabinets, and so hard.
The root causes of fatigue fracture occurs in the tooth is too high alternating stress duplicate the role, from the dangerous section (such as root) fatigue fatigue crack initiation source continues to expand, the stress remaining tooth cross-section exceeds its limit stress, resulting in an instantaneous break. Fatigue broken at its source, is a shell-shaped pattern extended starting point and radiate outward. It causes underestimation of the design load, improper material selection, precision gear is too low, heat treatment cracks, grinding burn, tooth root stress concentration and so on. Therefore, in the design should take full account of the transmission spectrum of dynamic loads, preferably gear parameters, the correct selection of materials and precision gear, fully guarantee the precision to eliminate stress concentration factors and so concentrated.
Cause random cleavage is usually material defects, pitting, peeling or other local stress caused by stress concentration is too large, or larger hard objects have fallen cause meshing zone.
Tooth surface fatigue
Tooth surface fatigue under excessive contact shear stress and the effect of stress cycles, the tooth surface or below the surface fatigue cracks and further expansion of the tooth surface damage caused by its performance in the form of pitting early, destructive pitting tooth surface flaking, and surface crushing and so on. Especially destructive pitting, often in line gear parts appear, and continues to expand, the teeth face serious damage, increased wear and tear, resulting in broken teeth failure. Gear strength correctly designed and selected materials, heat treatment to ensure the quality, select the appropriate accuracy with improved mounting accuracy, improve the lubrication conditions, is a fundamental measure to resolve the tooth surface fatigue.
Gluing
Gluing is engaged in the tooth surface engagement at the boundary film is damaged, resulting in contact with the tooth surface metal fusion welding and tearing of metal tooth surface phenomenon, probably due to poor lubrication conditions cause interference or appropriate to improve the lubrication conditions and remove the cause of the interference and adjust parameters of the drive member, clear partial load concentration, reduce or eliminate the phenomenon of glue.
Bearing damage
Gearbox bearings are the most important parts of its failure often cause catastrophic damage to the gearbox. Bearing during operation, is subjected to between rings and rolling surface repeatedly applied alternating load, due to the installation, lubrication, maintenance and other aspects of the reasons, and pitting, cracking, spalling and other surface defects, bearing failure, thus Deputy gear box and cause damage. According to statistics, among the many factors that affect bearing failure, the reason for installation belonging to 16% due to pollution also belong to 16%, but it belongs to the reason and the lubrication aspects of fatigue 34% each. Use more than 70% of bearings reach the predetermined lifetime. Thus, the emphasis on bearing design and selection, to ensure sufficient lubrication conditions, according to the specifications for installation and commissioning, to strengthen the monitoring of bearing operation is necessary. Usually provided on the gearbox bearing temperature alarm point, the phenomenon of abnormally high temperature bearings monitor the temperature difference between the different bearing on the same housing are generally not more than 15 ゜ C, to check at any time change the lubricant, abnormal immediately stop processing.
Broken shaft
Broken shaft gearbox is one of the major fault common. The reason is that the axis has not been eliminated in the manufacture of the stress concentration factor in an overload or alternating stress, beyond the limit of the material due to fatigue. Thus easy to produce stress concentration factors of the shaft to be given high priority, especially to have a smooth arc transition region connecting the shaft diameter, high finish requirements here, but also does not allow the cutting edge of the cutting tool marks . Design, strength of the shaft should be enough, keyways, spline shaft and other structures can not be unduly reduce the strength of the shaft. Ensure rigidity related parts to prevent deformation of the shaft, but also improve the reliability of the relevant measures.
