Engine plenum oil flow on-line measurement system

An online measurement system using oil flow atomizing nozzles and flexible optical fibers within the gas collection chamber of an aero-engine has solved the challenge of oil flow testing in confined, high-temperature structures, achieving efficient and reliable flow trace display and data acquisition. This system is suitable for integrated aero-engine components.

CN122171391APending Publication Date: 2026-06-09AECC SICHUAN GAS TURBINE RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AECC SICHUAN GAS TURBINE RES INST
Filing Date
2026-02-12
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing oil flow testing technologies are difficult to achieve online, dynamic, and high-contrast flow trace display in confined, high-temperature, and non-removable structures such as the gas collection chamber of aero engines. Traditional endoscopic imaging equipment cannot withstand high temperatures, manual oiling cannot be carried out without disassembling the machine, and static testing cannot reflect the dynamic flow field under real operating conditions.

Method used

An online measurement system for oil flow in the engine's air chamber without disassembling the engine is adopted. It includes two oil flow atomizing nozzles, a camera aperture, and a flexible optical fiber. The system visualizes the oil flow trace in the air chamber while the engine is running by using the oil flow atomizing nozzles. Combined with a pressure control unit and a high-definition camera, it achieves automated cyclic operation.

Benefits of technology

It enables high-precision visual measurement of internal flow characteristics without compromising the sealing of the gas collection chamber, significantly improving the efficiency and data consistency of oil flow testing. It is applicable to integrated aero-engine components and solves the measurement challenges in confined spaces and high-temperature environments.

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Abstract

This invention belongs to the field of aero-engine testing technology and provides an online measurement system for oil flow in an engine's gas collecting chamber. The system includes two oil atomizing nozzles that pass through the side wall of the gas collecting chamber casing, their atomizing surfaces intersecting to form a cross-region within the chamber. An imaging aperture is aligned with this region. One end of a flexible optical fiber extends into the chamber and is aligned with the cross-region, while the other end connects to an external high-definition camera for exporting images of the oil flow trajectory. Furthermore, the system can be equipped with a pressure control unit, including a regulating valve, pressure measuring points, and a control computer. Compressed air propels the oil, and the pressure measuring points provide feedback on the oil pressure. The control computer adjusts the spray pressure and triggers imaging, ensuring stable convergence of the atomizing surfaces of the two nozzles. This invention requires no disassembly or internal electronic equipment and is suitable for online, multi-state oil flow visualization testing under real engine operating conditions, particularly for confined and non-removable structures such as gas collecting chambers and sealed chambers.
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