Aero engine gearbox and aero engine

Abstract

The disclosure provides an aero-engine gearbox and an aero-engine, which belong to the technical field of aero-engines. The aero-engine gearbox includes a box body, a gear shaft, a gear, a first bearing and a second bearing; the first bearing and the second bearing realize the floating support of both ends of the gear shaft, so that the gear shaft can be bidirectional in the axial direction Movement: a first boss and a second boss are arranged on the gear shaft, and the first boss and the second boss cooperate with the first bearing and the second bearing respectively to limit the amount of movement of the gear shaft in the axial direction. The aero-engine gearbox has higher stability.

Description

technical field [0001] The present disclosure relates to the technical field of aero-engines, in particular to an aero-engine gearbox and an aero-engine. Background technique [0002] At present, the axial fixing methods adopted by the aero-engine accessory transmission gearbox are mainly divided into two-point one-way fixed type (both ends fixed) or single-point two-way fixed (one end fixed, one end swimming type). These two support methods make the axial movement of the gear shaft extremely small or impossible, which not only limits the application conditions of the gear shaft, but also easily blocks the gear shaft when subjected to an axial load. For example, when the gear shaft expands with heat and contracts with cold, because the thermal expansion coefficients of the gear shaft and other components in the aero-engine accessory transmission gearbox are difficult to keep consistent, and the axial movement of the gear shaft is extremely small, the gear shaft It is diffic...

AI Technical Summary

Problems solved by technology

These two support methods make the axial movement of the gear shaft very small or impossible, which not only limits the application conditions of the gear shaft, but also the gear shaft is easy to get stuck when subjected to axial load

For example, when the gear shaft expands with heat and contracts with cold, because the thermal expansion coefficients of the gear shaft and other components in the aero-engine accessory transmission gearbox are difficult to keep consistent, and the axial movement of the gear shaft is extremely small, the gear shaft It is difficult to achieve effective expansion and contraction, resulting in changes in internal stress and forces with other components, and in severe cases, it will lead to failure of the gear shaft

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