Source:Sheng Wei networkAuthor:admin Addtime:2019/10/09 Click:
Tapered roller bearings
are suitable for receiving radial load, unidirectional axial load and combined radial and axial load. The axial load of tapered roller bearings depends on the contact angle alpha, that is, the raceway angle of outer ring. The larger the contact angle alpha, the greater the axial load. Normal tapered roller bearings do not allow angular errors, but the appearance of rollers and raceways can allow angular errors of 2'-4', after special design. Single row tapered roller bearings single row tapered roller bearings can accept the axial load in one direction.
It can also limit the axial displacement of the shaft in one direction relative to the bearing seat. Even under the action of pure radial load, additional axial force will be generated inside tapered roller bearings. At this time, an equal amount of reverse force is needed to balance it. Two single row tapered roller bearings with the same structure are usually installed face-to-face or back-to-back in two supports. In order to ensure good operation of the bearings, tapered roller bearings, like other ball bearings and roller bearings, must exert a certain amount of minimum load, especially at high speed, high acceleration, or under the condition of frequent changes in load direction.
Because of these working conditions, the inertia force of the roller and the holder and the friction in the smoother will have a negative impact on the rolling and rotating accuracy of the bearing, and there may be harmful sliding motion between the roller and the raceway. The minimum load Fmin required for tapered roller bearings can be budgeted with the following formula: Fmin = 0.02C, C-ultimately rated dynamic load in the formula, and a larger minimum load may be required when starting at low temperature or when the lubricant viscosity is high. Usually, the weight of the bearing support itself, plus the load accepted by the bearing, has exceeded the minimum required load. If the minimum load has not yet been reached, additional radial load must be applied to such bearings, such as axial preloading to meet the minimum load request.
In the use of each product, we are most concerned about the most central value of such products and the various elements that affect the central value. As far as tapered roller bearings are concerned, their operating efficiency is greatly affected by their stress conditions. Therefore, it is very important to analyze the acceptance of tapered roller axles, which is not only the knowledge that users should control, but also the core way for businesses to promote such products.