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推力调心滚子轴承
推力调心滚子轴承能同时承受轴向和径向负荷,但径向负荷不得超过轴向负荷的55%。这类轴承还有另一个重要特点是具有自动调心性能,因为使其对不同心度和轴的挠曲不甚敏感。只要负荷P和P0不超过0.05C0(P和P0分别为当量额定动负荷和当量额定静负荷;C0为基本定额静负荷),且轴圈旋转,轴承就允许一定范围的调心角。根据直径系列不同,轴承允许下表所列的调心角。

小的数值试用于大轴承,而且负荷增大时允许调心角将会减小。

推力调心滚子轴承在运转过程中,滚子受离心力作用,滚子和滚道之间产生相对滑动,导致轴、座圈分离,为了保证轴承正常工作,必须施加一定的

轴向载荷。当作用于轴承的实际轴向载荷小于最小载荷时,轴承必须予紧。

推力调心滚子轴承可承受向重载并且适用于很高的转速。该轴承广泛应用于轧钢机、重型机床、石油钻机、轮船大型立式电机及联合掘进机等重型机械。

Thrust   self-alignment  roller  bearing

   Thrust self-alignment roller bearing can bear axial and radial loads simultaneously but the radial load must not exceed 55% of axial loads. The bearing has another advantage of self-alignment. Therefore, it is not sensitive to the axis non-concentricity and flexibility. As long as load P and P0 (P andP0 detonate equivalent rating static load respectively) don’t exceed 0.05C0(C0 denotes basic rating static load) and the axis race rotates, the bearing allows for a self-alignment angle within a certain range. The bearing allows for the self-alignment angles shown in the table below depending on different diameter series.

   Small value is applicable for big bearing and allows to reduce self- alignment angle when load increases.
   During running of self-alignment roller bearing, centrifugal force acts on the roller and relative slip exists between the roller and the raceway, which could cause the axis and the seat rings to be detached. Some axial loads must be applied to the bearing so as to ensure the bearing to be in a normal operation. When the actual axial load acting on the bearing is smaller than minimum axial load, the bearing must be fastened.
   Thrust self-alignment roller bearings can bear heavy axial load and are applicable for high revolution. They are widely used in steel rolling mills, heavy-duly machine tools, petroleum rigs, large-sized vertical electric motors for ships and combined development machines.

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