Bearings for multi-rotors and aero-engines

Abstract

The invention relates to a bearing for multiple rotors, and an aero-engine. The bearing for the multiple rotors comprises an inner ring (1), an outer ring (2) and at least one middle ring; the inner ring (1), the at least one middle ring and the outer ring (2) are sequentially arranged from inside to outside along the radial direction of the bearing; a rolling body is arranged between the inner ring (1) and the at least one middle ring, and a rolling body is arranged between the at least one middle ring and the outer ring (2); and at least one of the inner ring (1), the at least one middle ring and the outer ring (2) is provided with an oil hole (11), and the oil hole (11) is used for conveying lubricating oil. According to the bearing, the inner ring, the outer ring and the at least one middle ring are arranged, the multiple rotors can be simultaneously connected and supported through one bearing; after the bearing is applied to the aero-engine, a supporting structure of the aero-engine can be simplified, the number of bearings and the number of supporting points are reduced, the weight of the aero-engine is reduced, and the thrust-weight ratio is increased; and in addition, the bearing is provided with the oil hole for conveying the lubricating oil, so that the lubrication of the bearing is facilitated, the abrasion is reduced, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a multi-rotor bearing and an aero-engine. Background technique [0002] With the continuous development of aero-engine technology, the thrust-to-weight ratio continues to increase, from about 5 in the early days to about 10 at present, and it is expected to develop to a higher level in the future. By 2020, a fighter with a thrust-to-weight ratio of 20 will be successfully developed. For engines, the improvement of the thrust-to-weight ratio depends to a large extent on the structural weight reduction of the engine itself. How to effectively reduce the structural weight of the engine has become an unavoidable problem. [0003] There are many measures to reduce the weight of the engine structure. Among them, the main support structure of the aero-engine is more complicated due to the large number of rotors and fulcrums. If the main support structure of the aero-engine can be e...

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