Rolling bearings and aero engines

Abstract

The invention relates to a rolling bearing and an aero-engine. The rolling bearing comprises an outer circle, rolling elements, an inner circle and multiple roller paths which are circumferentially arranged on internal circumference of an outer circle or an external circumference of an inner circle at intervals, and each roller path is internally provided with one rolling element. Multiple roller paths which are circumferentially arranged on internal circumference of the outer circle of the rolling bearing or an external circumference of the inner circle at intervals are used for positioning the rolling elements, the roller paths limit the rolling elements as well as the inner circle or the outer circle, in order to guarantee synchronism of the rolling elements as well as the inner circle or the outer circle, and effectively prevent slip of the bearing; because interval positioning between rolling elements is realized by interval roller paths, so that holders are not needed to arrange, the structure is simple and reliable, weight is reduced, and running resistance of the rolling elements of the bearing is reduced at the same time; compared with common bearings, the quantity of the rolling elements is reduced to at least three, preload of the bearing is increased, and slip rate is reduced.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a rolling bearing and an aero-engine. Background technique [0002] The working characteristics of roller bearings in aeroengines are high speed and small load. During high-speed operation, the rollers of the roller bearing tend to break away from the contact with the inner ring raceway under the action of a large centrifugal force. Because the rotors of aero-engines are made lighter, the radial load acting on the bearing is small, and when the aircraft is maneuvering, the radial load acting on the bearing will be smaller or even zero in some cases. At the same time, the unbalanced force of the rotor will offset some radial loads acting on the bearings in some cases, resulting in light or zero loads of the bearings. These two factors will make the drag force generated by the friction of the bearing become very small, or even zero. This will inevitably cause the bearing to...

AI Technical Summary

Problems solved by technology

[0007] Existing rolling bearings generally require a cage to position the rolling elements, and the structure is complex

Moreover, the above measures can only prevent and control the slippage of the aero-engine roller bearings to a certain extent, the degree of slippage has been alleviated, and the failure rate has been slightly reduced, but the problem of bearing slippage still exists, and it is not a permanent cure.

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