Sliding bearing skill requirements

Source: China Bearing Network Time: 2014-09-14

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Sliding Bearing Skills Requirements Summary: Basic Requirements Shaft Sliding Bearings Uniform and Fine Touches Must Have Cooperative Cooperating Voids Touching Angles Neck Plain Bearings Touching Surfaces Corner Angles Cannot Be Large Too Wrong Touch Angles Sliding Bearing Pressure Adds Severe When Sliding Bearings Occur Large deformation accelerates wear and shortens service life. Touch angle is too large. Oil film composition is not outstanding. Liquid smoothness. Experimental research indicates sliding liquid dynamic pressure bearing common shaft housing shaft
1. The basic requirement is to make the journal and the sliding bearing evenly and finely touched; there must be a certain cooperation gap.
2. The touch angle refers to the central angle of the journal and the sliding surface of the sliding bearing.
The touch angle is too large or too small. The touch angle is too small to increase the pressure of the sliding bearing; the severe bearing will cause large deformation; the wear will be accelerated; the service life will be shortened, the touch angle will be too large; the composition of the oil film will be affected. Unsatisfactory liquid smoothness.
The experimental study indicates that the limit of the sliding bearing touch angle is 120Â°. When the sliding bearing wears to this touch angle; the liquid is smooth and damaged. Therefore, the sliding bearing bearing condition is not affected; the smaller the touch angle, the better.
Theoretical analysis from the conflicting force distance; when the touch angle is 60Â°; the conflicting moment is the most. The sliding bearing of the ã„’æ¤‹ ã„’æ¤‹ ã„’æ¤‹ ä¿‘å“‚ 500r/min; the touch angle is 60Â°; the sliding bearing with the speed lower than 500r/min The touch angle can be selected from 90Â°; it can also be used at 60Â°.
3. Touch the practical touch condition of the journal and the plain bearing surface; the number of practical touch points per unit area can be used to indicate that the more touch points are, the thinner and more uniform; the better the sliding bearing is scraped; the opposite; Sliding bearing scraping is not good.
Generally speaking, the more fine the touch point is, the more difficult it is to scrape. The touch point should be determined according to the function and working condition of the sliding bearing in production; the materials listed in the table below are for reference:
Sliding bearing speed (r/min) Touch point (number of touch points per 25 x 25 mm area)
100 below 3~5
100~500 10~15
500~1000 15~20
1000~2000 20~25
The above table data can be selected for machines with 2000 and above class I and class II precision; the class III precision machine can be folded in half according to the above table data.

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