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How to ensure that the bearing device does not deform
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2. It is necessary to accurately calculate the interference of the rotating ferrule cooperation; it is also necessary to accurately calculate the appropriate cooperation amount of the fixed ferrule.
Rotating ferrules should also be smaller in the possible range. It is only necessary to ensure the thermal expansion effect at the operating temperature; and the centrifugal force at the highest speed; it does not form a tight cooperation surface movement or sliding. Fixed ferrule According to the size of the working load and the bearing scale; choose a small gap cooperation or interference cooperation; too loose or too tight are arrogant to adhere to the original accurate shape.
3, the bearing works under high speed conditions; and the operating temperature is higher; should pay special attention to the cooperation of the rotating ferrule can not be too loose; to avoid the appearance of painful oscillation; and the cooperation of the fixed ferrule can not present the gap; to avoid the ferrule Deformed under load and provokes oscillation.
4. The condition for adopting small interference cooperation on the fixed ring is that the surface has a high shape accuracy and a small roughness on both sides; otherwise, it is more difficult to form the device and it is more difficult to disassemble; in addition, it is necessary to consider the influence of the spindle thermal elongation. .
5, the use of pairs of double-angle touch ball bearings of the main shaft; 80% load is light; if the cooperative interference is large, then the internal axial preload will be significantly larger; the formation of helium impact. Use double column short The main shaft of cylindrical roller bearing and the main shaft of tapered roller bearing; its load is relatively large; so its cooperation and interference is relatively large.
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