Track Roller Bearings According to the use of parts
According to the use of parts and conditions of use and environmental conditions to select the size, accuracy, with the appropriate track roller bearings is to ensure bearing life and reliability of the premise.
Use parts: track roller bearings for radial load to bear the radial and axial joint load, usually with two sets of track roller bearings matching use, mainly in the car before and after the hub, the active bevel gear, Differential, reducer and other transmission parts.
Allowable speed: 0.3-0.5 times the permissible speed for the bearing in a well-installed, well-lubricated environment. Under normal circumstances, to 0.2 times the limit speed is the most appropriate.
Allowable tilt angle: Crawler roller bearings generally do not allow the shaft relative to the housing hole is tilted, if tilted, the maximum does not exceed 2 '.
Allowable temperature: Under normal conditions of load, and the lubricant has high temperature resistance and is lubricated sufficiently, the general bearing is allowed to operate at an ambient temperature of -30 ° C to 150 ° C.
Bearing grease choice:
Improper lubrication accounts for 36% of the cause of premature failure of the track roller bearings. General purpose grease can not meet the needs of a wide variety of special bearing applications, using only one or all kinds of common grease to meet all the bearings Application, the problems caused by far more than the benefits of a unified brand. Bearing application conditions are very diverse, the correct lubrication is to require grease and bearing application conditions to match.
Bearing grease is the basis for ensuring smooth bearings, worry-free operation and maximum reliability, even in the most extreme working conditions. Grease prevents contaminants from entering the bearing, cushioning the impact load and preventing corrosion. In the practical application of the choice of the appropriate grease is to obtain the maximum bearing life of the basic conditions.
The correct selection of the lubricant standard includes the type and size of the track roller bearing, the temperature, the speed, the load as well as the desired service life and the supplementary lubrication period.
The initial radial clearance of the bearing is gradually reduced during the pushing process, and the pushing amount determines the degree of fit. Therefore, the initial radial clearance of the track roller bearing must be measured before installation. During the push of the bearing, the radial clearance is continuously measured until the required radial clearance is reduced and the desired interference fit is achieved.
As the temperature is subject to lubrication, speed, load, the impact of the environment, the table only shows the approximate temperature range. The role of bearing lubrication lubrication of the rolling bearing fatigue life and friction, wear, temperature rise, vibration and other important impact, there is no normal lubrication, the bearings can not work. Analysis of track roller bearing damage causes that about 40% of the bearing damage are related to poor lubrication. Therefore, good lubrication of the track roller bearings is an effective measure to reduce bearing friction and wear. In addition, the bearing lubrication there are heat, rust, seal, ease the impact of a variety of roles.