Very poor gear meshing conditions can not see the line

Release time: 2017-11-03 10:27:03

The basic situation of gear damage is similar, are partial demolition of gear flange, ranging from a few teeth, as many as ten teeth, a bit indentation on the tooth surface. General newly installed a pair of gears due to manufacturing and assembly and other reasons need to run together for some time, running conditions from the contact line is very easy to see, we noticed two gear meshing conditions are very poor, do not see the running line, or even worse Gear installed precision. From the analysis of the reasons for the local demolition teeth, because of helical gear transmission line contact, uneven loading, installation errors or shaft bending deformation can cause disassembly. Unbalanced loading is caused by the low accuracy of gear processing, and the accuracy of 6-level gear can not be qualified by many manufacturers. Two gears are rigid shaft, there is no bending. These two can be ruled out. Therefore, only from the installation to find the reason.


From the gear demolition scene, the gear near the baseline is intact, there is no fatigue damage, through the bending strength check, bending strength is sufficient. After excluding all kinds of possibilities, we concluded that the tooth removal was caused by excessive impact and vibration caused by the abnormal load caused by the transmission. As for the pit-like indentation on the tooth surface, it is due to indentation of the detritus after disassembly. The main reason is still the disassembly. This is why the reason for breaking teeth to study the impact load from where, uneven load how to produce. Our study found that gearbox high and low speed shaft bearings are used 7000-type cylindrical thrust bearings, the other we noticed the thermal reasons. First look at the connection between the gearbox and the turbine is connected with the membrane disk coupling together. Due to the piston body wear parts directly above the piston, there is no impact on the axial balance. Therefore, only the cylinder burr is deburred, mainly to solve the axial deformation of the piston body due to the deformation of the edge region formed by the high temperature.

 
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