Engine bearing cavity cooling structure and engine

By installing a cooling box between the bearing housing and the load-bearing casing and using film cooling holes for cooling, the problem of high temperature in the bearing cavity was solved, resulting in reduced lubricating oil consumption and improved engine reliability.

CN116696555BActive Publication Date: 2026-05-29太仓点石航空动力有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
太仓点石航空动力有限公司
Filing Date
2023-07-06
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the existing technology, the bearing cavity of gas turbines and aero engines is prone to excessively high temperature due to high-temperature heat transfer, resulting in high oil consumption, oil coking, and premature bearing failure. This problem is particularly difficult to solve effectively in small and medium-sized engines where the structural space is limited.

Method used

An annular cooling box is installed between the bearing housing and the load-bearing casing. High-pressure cold air in the cooling box is used to cool the bearing cavity, the inner cavity of the load-bearing casing, and the rim sealing cavity through cross-shaped air film cooling holes and through holes, thus isolating heat radiation and carrying away heat.

Benefits of technology

It effectively reduces bearing cavity temperature, improves lubrication, reduces oil consumption, and enhances engine reliability and safety.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN116696555B_ABST
    Figure CN116696555B_ABST
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Abstract

The application relates to the technical field of gas turbine and aero-engine thermal management, in particular to an engine bearing cavity cooling structure and an engine. The engine bearing cavity cooling structure comprises a cooling box which is hollow inside and is arranged around the outer periphery of a bearing seat, and cold air continuously exists in the cooling box; a first cooling hole is arranged on the side wall of the cooling box facing the inner cavity of a load case; the first cooling hole is connected with the cooling box and the inner cavity of the load case; a second cooling hole is arranged on the side wall of the cooling box facing a rim seal cavity; the second cooling hole is connected with the cooling box and the rim seal cavity; wherein the cold air is output from the first cooling hole to the inner cavity of the load case and is also output from the second cooling hole to the rim seal cavity. The application can effectively reduce the temperature of the bearing cavity, improve the lubricating effect of the lubricating oil, reduce the consumption of the lubricating oil, and improve the reliability and safety of the engine.
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