How to prolong service life of rolling bearing
In the actual production, machinery and equipment used by the fixed length of bearing life directly relates to the normal use of the machinery and production work. Select the bearing while under different environmental conditions, but has a lot of bearing on the far reaches the design life due to damage and failure. Failure of bearings used in production which would produce intense vibration and noise, while the relevant parts are damaged, finally resulting in a series of adverse effects. Rolling bearing failure mainly has following several pitting fatigue, excessive permanent deformation and wear, glue, inner and outer rings of broken, rolling crush, cage wear and fracture, most are outside damage,slide bearing beads, bead frame won serious wear.
In addition, inner ring is broken, Plastic bearingbecause the bearings are subjected to the same loading, rolled in the contact area is larger than the outer raceway of the moral, the point of contact, pressure greater than the outer raceway of roller bear, will cause the inner circle began to fail. Therefore, failure in the study and to find the appropriate solutions are effective ways to extend the life of rolling bearings. Also, the study of bearing noise, torque, runout, pollution prevention and control, thermal expansion problem is also related to the State, such as important factors in xihu bearing life.
Are many reasons causing premature failure of the bearing, but primarily used is improper and inadequate maintenance and lubrication, poor lubrication, Assembly, transport, dismantling, pollution overload occurs during impact and shock. Pollution was man-made, is the removal tool does not finish wash and other factors.
In practice due to poor lubrication or excessive overload of work, arising from excessive friction and heat will soften bearing steel and bearing caused by volume expansion, extrusion pressure, when you reach a certain level, will lock the bearing on the shaft. When the overheated bearing rolling volume and maintain the support of smaller gap, on the stress concentration in the cage, extended over time, cage will break, so as to accelerate the speed of bearing failure.
Effect of clearance, clearance is too large between the axis and the axis, relative motion between the two, is in line with the axis of the excessive wear gap growing lead bearing scrap: two-bearing cracks, affect the precision of movement. These cause premature failure of the bearing, is to the disadvantage of our practical work, to study how to prevent premature bearing failure, extended service life is of great practical value.
Pitting is the most typical form of bearing failure, its main reason is frequently in the handling of the impact of bearing and incorrect Assembly, pressing the Raceway. When Raceway after indentation. Turning rollers, one impact indentation on each one, has a rolling effect on indentation, when the load increases, the roll, the greater pressure, cycle sport, indentation flakes peeling and vibrations increase, increase noise.
Also, dang bearing Shang has outside load and does not turns Shi, due to external of vibration will caused bearing inside and outside ring roll road Shang produced pressure trace, time a long will led to roll road produced peeling, peeling of debris more on bearing harmful, for prevent these accident of occurs, in daily of work among, can used effective of method, elimination vibration source and vibration, keep good of lubrication, also can to bearing imposed minor of early contains, makes scroll body and scroll contact good, improve seismic of ability, also has in installed Shi and hole of different axis of, May result in failure of the bearing. |
