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Bearing installation method – installation of thrust and journal bearing in turbine

266 Published by admin Mar 21,2022

The fit between the thrust and journal bearing in turbine and the shaft is generally a transition fit, and the fit between the seat ring and the bearing seat hole is generally a clearance fit (I must agree with me when I see it here). The center collar of a bidirectional thrust and journal bearing in turbine shall be secured to the shaft to prevent rotation relative to the shaft. The installation method of thrust and journal bearing in turbine is generally in the case of shaft rotation, so the fit between the inner ring and the shaft is an interference fit, and the fit between the outer ring of the bearing and the bearing chamber is a clearance fit.thrust and journal bearing in turbine

When installing a thrust and journal bearing in turbine, check the verticality of the collar and the centerline of the shaft. The method is to fix the dial indicator on the end face of the case, so that the contact head of the dial indicator is on the raceway of the bearing collar, rotate the bearing at the same time, and observe the dial indicator pointer at the same time. When the shell hole is deep, it can also be checked with an extended dial indicator. After the thrust bearing is installed correctly, its seat ring can automatically adapt to the rolling of the rolling elements to ensure that the rolling elements are located in the upper and lower raceways. Machinery Frontier WeChat Platformthrust and journal bearings

If the installation is reversed, not only the bearing will not work properly, but also the mating surface will be severely worn. Since the difference between the shaft washer and the seat washer is not obvious, extra care should be taken during assembly to avoid mistakes. In addition, there should be a clearance of 0.2-0.5mm between the seat ring of the thrust and journal bearing in turbine and the bearing seat hole to compensate for errors caused by inaccurate machining and installation of parts. When the center of the bearing ring is offset during operation, this clearance ensures that it automatically adjusts, avoiding contact and friction, and making it work properly. Otherwise, the bearing will be seriously damaged.

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