1, along with reasonable structure design advanced, will have a longer life expectancy. Bearing generally after forging, heat treatment, machining, grinding and assembling multiple processes. Rationality, advanced processing technology, also affects the stability of the bearing life. Which affect the finished quality of bearing heat treatment and grinding operations, often has a direct relationship with the bearing failure. On bearing surface degenerating layer of research in recent years indicated that close to grinding and surface quality of bearing.
2, bearing the metallurgical quality of the material used to be the main factors affecting the early failure of rolling bearings. As metallurgy technologies (such as vacuum degassing of steel bearing) advances, improvements in the quality of raw materials. Raw material quality factor′s share in bearing failure analysis has already been reduced significantly, bearing but it remains one of the main factors affecting the bearing failure.
3, relevance of material is still bearing failure analysis on the factors that must be considered. Main tasks of bearing failure analysis, is based on a great deal of background material, analysis of data and failure modes, identify the main factors contributing to failure so that targeted measures for improvement, and extended bearing service, avoid unexpected early bearing failure. Installation conditions is one of the leading factors in the use factors are installed are not suitable, they result in packages bearing stress changes between the different parts, in a State of abnormal functioning of the bearing and early failure.
Detection Shi, first put one-way needle roller bearings cover open, selection appropriate diameter of wire, will its stopped into 15~40 mm long of small paragraph, put in axis neck Shang and the upper and lower bearing points interface Department, cover Shang bearing cover, by provides torque twist tight fixed bolt, then in twist pine bolt, remove bearing cover, with micrometer detection pressure flat of wire thickness, please out bearing top gap of average.
If the gap is too small, you can pad on the upper and lower joints. If too large, shave down the mat, the Institute, or pouring again.
Adjustment of the bearing Bush force: to prevent Bush and the axis of rotation may occur while working to move, in addition to cope with interference and moving parts, bearing or bearing cap must be used to pressure, measurement methods and top clearance measurement method, measured soft wire thickness, available to calculate the bearing Bush force (represented using elastic deformation of bearing compression)
General bearing clamping force at 0.02~0.04 mm. If the clamping force is not up to standard, you can increase or decrease the bearing and the bearing seat gasket thickness jiehe Mian methods to resize, tile back-no pad.
Other than bearing radial clearance in addition to guaranteed, should also ensure that the axial clearance. Axial clearance is detected, the axis moves to an extreme position, and then using a feeler gauge or dial gauge measurement axis from one extreme position to another location of the play that axial clearance.
When the bearing clearance does not meet the requirements, should be adjusted. Outside bearings often use shims to adjust the radial clearance (gap).