Ram air turbine emergency power unit and aircraft

By adding two sets of coaxially arranged turbine blades to the ram air turbine emergency energy drive device and optimizing the spatial layout using shape-complementary mounting parts and offset components, the problems of low power generation efficiency and wind energy conversion efficiency in the existing technology are solved, and faster starting speed and higher power generation efficiency are achieved.

CN116291950BActive Publication Date: 2025-10-17COMMERCIAL AIRCRAFT CORP OF CHINA LTD +1
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Patent Information

Application Number
CN202310099535.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-10
Publication Date
2025-10-17
Estimated Expiration
2043-02-10

AI Technical Summary

Technical Problem

The power generation efficiency and wind energy conversion efficiency of existing ram air turbine emergency energy drive devices are limited, and the number of blades is limited by the size of the cabin opening, affecting the structural strength of the aircraft.

Method used

A turbine blade design includes two sets of coaxially arranged turbine blades. Through the cooperation of complementary-shaped mounting parts and offset components, the relative movement of the blades in the axial and circumferential directions is achieved, the number of blades is increased, the spatial layout is optimized, and the turbine starting speed and power generation efficiency are improved.

Benefits of technology

It improves the efficiency of turbines in converting wind energy into energy, shortens the time it takes for RAT to connect to the grid, enhances heavy-load carrying capacity, and reduces low-speed power supply limitations.

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Abstract

The present application relates to a ram air turbine emergency power drive device, comprising: a first set of turbine blades and a second set of turbine blades coaxially arranged in an axial direction, wherein the second set of turbine blades can be rotated relative to the first set of turbine blades around the axial direction from a first position to a second position and kept in the second position, wherein in the first position, the first set of turbine blades is superposed with the second set of turbine blades, and in the second position, the first set of turbine blades is at a predetermined non-zero angle with the second set of turbine blades. In this way, the number of blades is increased without affecting the space in the ram air turbine cabin, so that the turbine starting speed is faster, and the RAT access to the power grid time is reduced. In addition, increasing the number of blades can also improve the efficiency of the turbine in converting wind energy, thereby improving the efficiency of the emergency power generation. The present application also relates to an aircraft comprising the ram air turbine emergency power drive device.
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