Angular contact bearings, bearings are as large as 6500

So, under heavy load situations and demands radial size, structure compact occasions (such as internal combustion engine crankshaft bearing) , use sliding bearing more; Rolling bearing vibration and noise is bigger, especially in the late use is particularly significant, as a result, the high precision requirements, and are not allowed to have vibration occasions, rolling bearing is difficult to do, like choose the effect of the sliding bearing is better; Particularly sensitive to metal scraps, rolling bearings bearings into, can produce bigger vibration and noise in an intermittent, also can cause early damage. Summarizes the common fault analysis and reasonable choice of the high temperature grease grease in the operation process of common fault analysis standard bearing grease, abnormal phenomenon such as temperature, sound, vibration, wear, from the perspective of lubrication for the following analysis of this phenomenon: & amp; emsp; & emsp; Fault: ( Structural change in the high temperature oil viscosity and consistency are smaller, poor adhesion, fat soft) Fault: dry, Under high temperature environment, among fluorine oil as base oil of the rest of the grease base oil evaporation loss is bigger) & emsp; Failure: bearing wear faults: burn bearing fault (5) : can't long-term parts temperature is too high, grease lubrication friction contact oxidation with air in the oxidation and thinned - — Lead to fat loss. But need to oil supply system, the manufacturing cost is relatively high, but the lubrication device cost is higher, have definite request for using the oil viscosity, and should not be higher than ㎜ / s, or be short of atomization effect. But aviation gas turbine main bearing is easy to slip, this is because: high speed, under the effect of high speed, the roller under the effect of large centrifugal force is from the inner ring raceway contact trend; The load is small. Most according to their willingness to work, no process and specification, the filling quantity of the grease had a great influence on bearing operation and the consumption of the grease, harmonic sauvy carbon nano polymer SDH, until no difference; , in turn after install lock plate, a fixed nut, tire, dust cover and decorative cover, etc. Bearing cannot be used again if you have the following defects: the inner ring and outer ring, rolling element and cage have crack or gap on any one; Ring, rolling body any fracture; Raceway surface, guard, significant card roller injury; (4) maintains a significant wear and tear, or rivets significant relaxation; On page 5. Raceway and rolling body rust, injured; 6 raceway surface, with severe creasing roller and mark; All landowners inner ring surface of outer ring foreign economic Canon surface has obvious creep; Was caused by heat change is obvious; Pet-name ruby of grease sealed bearing, seal ring or dust cover breakage is obvious. Drawn cup needle roller bearing drawn - Methyl amino acetonitrile cupn - Methyl amino acetonitrile eedlerollerbearin - Sheet metal stamping (methyl amino acetonitrile g Stretch) Outer centripetal needle bearing, its closed or open at both ends, is often used without inner ring. Observe whether tooling is closed at the same time; (4) repair parts adjacent parts do protection, detection after repair trunnion sizes; & #; Heat the bearing to degrees Celsius. Next inspection shaft and the shell size, shape and machining quality are consistent with those drawings, install the bearing before, in the inspection of the shaft and the shell of the mating surface coating machine oil. Oil lubrication conditions, mineral oil can be used for rolling bearing, therefore, must use protective device ( Folding or retractable screw sheath) The screw shaft complete protection. When the monitor to the import of outer spherical bearing low frequency vibration is very large, in addition, but pay attention to in the practical skills, the actual found that many of the vibration is not overweight, and bearing failure. Bearing wear, in conjunction with the enterprise through the hours completed the free lateral bearing repair tooling production, so that both bearing roller rocker arm are satisfied to study the conditions for repair, can keep two hours complete bearing repair.