Aero-engine oil sealing aerodynamic pressure difference mechanism

By designing a pneumatic differential pressure mechanism for sealing the lubricating oil of an aero-engine, and utilizing a combination of valves, housings, end caps, and springs, the problem of untimely pressure regulation in the fan unloading chamber was solved, achieving timely and accurate pressure regulation and ensuring stable engine operation.

CN122257907APending Publication Date: 2026-06-23AVIC GUIYANG ENGINE DESIGN & RES INST
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Patent Information

Application Number
CN202610273412.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-06
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing pressure relief technologies cannot adjust the pressure in the unloading chamber of the aero-engine fan in a timely and accurate manner, leading to pressure imbalances that may cause malfunctions or damage.

Method used

Design a pneumatic differential pressure mechanism for sealing the lubricating oil of an aircraft engine. By using a combination of valve, housing, end cover and spring, the pressure of the fan unloading chamber is adjusted by pneumatic differential pressure to ensure that the pressure of the fan unloading chamber meets the specified value at high speed.

Benefits of technology

It enables timely adjustment of the fan unloading chamber pressure at high speeds, avoiding malfunctions caused by excessive pressure and meeting the design and operational requirements of aero engines.

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Abstract

An aero-engine lubricating oil sealing aerodynamic pressure difference mechanism, comprising a valve, a shell, an end cover and a spring; the shell comprises an outer shell and a base, one end of the outer shell is connected with the base, and the other end is connected with the end cover; the spring is sleeved outside the valve; the valve is arranged inside the shell, one end of the valve is connected with the base, and the other end is connected with the end cover. The aerodynamic pressure difference mechanism is used in the bleed air structure of the aero-engine lubricating oil sealing pressurization system, can timely and accurately adjust the pressure of the fan unloading cavity when the aero-engine rotates at a high speed, keep the pressure of the fan unloading cavity balanced, meet the working requirements of the fan unloading cavity, and reduce the failure or damage of the aero-engine caused by the unbalanced pressure of the fan unloading cavity.
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Citation Information

Patent Citations

  • pressure relief valve

    CN112534168B

  • Pressure reducing and releasing valve

    CN119934279A