Fan boost stage device and turbofan engine including the same

By arranging the reducer on the outside of the turbofan engine body and achieving transmission connection through the transmission mechanism, the space and design problems caused by the arrangement of the reducer in the runner plane are solved, and the performance and life of the reducer are improved.

CN115075944BActive Publication Date: 2025-03-28AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Application Number
CN202110282386.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-03-16
Publication Date
2025-03-28
Estimated Expiration
2041-03-16

AI Technical Summary

Technical Problem

In existing turbofan engines, the reducer is arranged within the flow path surface, resulting in limited internal space, and the size, lubrication, heat dissipation of the reducer is limited, making the design difficult.

Method used

The reducer is arranged outside the engine body, and the transmission connection between the reducer and the low-pressure turbine shaft and the fan shaft is realized through the first transmission mechanism and the second transmission mechanism.

Benefits of technology

The contradiction between the reducer and the runner space is effectively solved, the size of the reducer is liberated, the structural strength is strengthened, and heat dissipation and lubrication can be performed well, extending the life of the reducer.

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Abstract

The present invention discloses a fan boost stage device and a turbofan engine including the same, wherein the fan boost stage device comprises an engine body, a first transmission mechanism, a second transmission mechanism and a reducer, wherein the engine body comprises a low-pressure turbine shaft and a fan shaft, wherein the reducer is located outside the engine body, wherein the two ends of the first transmission mechanism are respectively connected to the low-pressure turbine shaft and the input end of the reducer, and the two ends of the second transmission mechanism are respectively connected to the fan shaft and the output end of the reducer. The turbofan engine comprises the fan boost stage device as described above. The fan boost stage device and the turbofan engine including the same of the present invention, by arranging the reducer outside the engine body, greatly reduces the space restriction inside the engine body, effectively solves the contradiction between the reducer and the flow channel space; and the reducer size is freed, and the structural strength is enhanced; heat dissipation and lubrication can be performed better, thereby extending the life of the reducer.
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