An Improved Aircraft Landing Gear Door Lock Test Device

Abstract

The invention puts forward an improved cabin door lock testing apparatus for an aircraft undercarriage. On the basis of a new design of a loading assembly, a loading spring and a back spring provide different loads at a locking stage and an unlocking stage, thereby realizing applying of a small simulated aerodynamic loading force during a locking process of a cabin door lock and applying of a large load during an unlocking process. Moreover, the load control of the apparatus becomes accurate; and the practical loaded situation of the aircraft cabin door lock in practice can be simulated actually. Moreover, the apparatus having advantages of small size and light weight cooperates with a vibration bench, an integrated environment box and a hydraulic system and is capable of realizing simulation of a complicated load environment like a vibration load, a temperature load, a humidity load, and a hydraulic load of a cabin door lock.

Description

technical field [0001] The invention relates to the field of aircraft reliability tests, in particular to an improved aircraft landing gear cabin door lock test device. Background technique [0002] The aircraft landing gear system includes a complex system consisting of landing gear mechanism assembly, landing gear door and actuator, door lock, auxiliary sensors and hydraulic control system. It has the characteristics of large mass, complex principle and high requirements for use. Among them, the door lock, as a mechanical product that keeps the door closed after the aircraft landing gear door is opened, closed or closed, plays an important role in ensuring the safe take-off and landing of the aircraft, mission reliability and flight safety; usually, this The failure of such products can easily lead to fatal aircraft accidents and affect the safety of aircraft use. Therefore, the development and application of such products require a large number of test verifications to en...

AI Technical Summary

Problems solved by technology

[0004] The current problem is: According to the requirements of the new hatch lock, a variable load is required to be applied during the unlocking and locking process of the hatch lock, that is, a small simulated aerodynamic load is applied during the closing process of the hatch lock, and a larger simulated aerodynamic load is applied during the unlocking process. The simulated aerodynamic load of

However, the existing hatch lock test device disclosed in the application number 201410215943.6 can only provide the same load during the unlocking and locking process of the hatch lock, which cannot meet the product test requirements.

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