A lot of engines are all bearing existence, only bearing common failure will stop running, the work can not be carried out, in order to improve the reliability of the engine must start from the bearing, the following I tell you about the five measures to improve the reliability of the engine bearing.
1, improve the machining accuracy. Improve the processing accuracy of bearing components, not less than grade 4 precision, appropriate use of effective backlash and installation of the mutual value. When installing, check the bearings according to the requirements of unique technical standards, such as appearance inspection, check whether there are more than the required surface defects and rust, and check the specifications and initial backlash at the joint.
2. The inclination of bearing ring and center line should not be large. For long life bearings to have high reliability, in the work of the standard bearing ring and center line tilt can not exceed the allowable specification (service life of more than 1000h bearings, tilt can not exceed 0.5 ').
3, with 3 point contact ball bearings. The reliability of ball bearings can be improved by replacing 4 point contact ball bearings with 3 point contact axial thrust ball bearings.
4. Steel cage. Use steel cage instead of brass cage (used in Russian engines), the surface of the cage should be gold plated.
5. Temperature difference between inner and outer rings is less than 5℃. If the heat of the bearing can be reasonably brought to and maintained on the total width of the bearing and there is a well-proportioned temperature gradient between the outer rings, and the temperature difference between the inner and outer rings is not more than 5℃, the reliability of the bearing can be improved. |
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