SKF adjustment method of universal joint bearing damage

Judge SKF bearing the degree of damage in use can use a listen to, two touch, three observation method to determine. 1, listening: using the hearing to identify irregular operating at a very commonly used method. If use a screwdriver or electronic stethoscope to detect abnormal noise is a compact has certain experience of the operator and maintenance personnel are often used. Universal joint bearing if good operation condition is low purring sound, such as bearing noise, sharp hissing sound, squeak, and other irregular sound, could be said bearing has been in bad state of operation. 2, touch: high temperature often said SKF bearing is in abnormal situation, the high temperature inside the bearing lubricant is harmful, but bearing some of the time at high temperature caused by bearing lubricant inside, if the gimbal bearings in the long run of more than 120 ℃ temperature will reduce the bearing life. The causes of bearing high temperature lubricant inadequate or excessive lubrication, lubricants contains impurities, heavy load, bearing damage, such as make friction clearance and oil seal. In normal circumstances, the bearing in the lubrication or there will be a natural temperature rise after the lubrication and lasts for a day or two. 3, observation: SKF bearing if get the good lubrication and no impurities and moisture to enter, showed no wear and tear of SKF bearing oil seal, if after open the original bearing box, should be periodically checked visual check universal joint bearing and oil seal. Check of the condition of the near the bearing oil seal to ensure that they are enough to prevent hot liquid, corrosive liquid and gas along the axis of infiltration of bearing, oil seal, if damaged, it should be replaced as soon as possible. Check the automatic lubrication system to ensure that the oil or grease into the bearings, and to ensure that the correct amount at the same time check whether the lubricant is color or black, if has this kind of situation usually said lubricant to the impurities, this situation is the use of bearing is also harmful. SKF bearing clearance refers to a fixed in a ring, a ring along the radial or axial made the biggest activity, so the clearance is divided into radial clearance and axial clearance. Universal joint bearing assembly, clearance cannot too big, also not too small. Clearance is too large, will cause the load at the same time reduce the number of roller, a single roller load increase, thereby reducing the rotating precision of bearing, reduce the service life; Clearance is too small, can make the friction force increases, the heat generated by the increased, aggravate wear, also can reduce the service life of bearing. Therefore, SKF bearing in the assembly to strictly control and adjust the clearance. Preload is SKF bearing, when it is assembled to the inner ring or outer ring an axial force, to remove the bearing clearance, and make contact with the inner and outer ring roller in the early deformations. Preloaded can improve bearing in the working status of the stiffness and rotation accuracy and load is larger, higher bearing rotating accuracy requirement is mostly in the absence of clearance there is even a small amount of work under the interference of the state, in this case you need in the assembly of universal joint bearing preloaded. Adjustment of clearance and preload is usually by inner ring external circle for appropriate axial relative displacement method. It is not hard to see from the above technology concept, through to the rolling bearing clearance adjustment, can improve the bearing capacity of SKF bearing and rotating accuracy, improve the service life of bearing. But at the same time can make the bearing friction intensified, calorific value increases, so adjust the clearance or preload must guarantee good lubrication and cooling. If improper or poor lubrication, you will in turn make the universal joint bearing wear, reduce the service life. Correctly, the adjustment of SKF bearing clearance and preload also note the following problem.