Non-Destructive Tests of Lock Tongues Used in Atr-72 Aircraft Landing Gear Based on Magnetic Method

Malec, Mirosław; Cieplak, Tomasz; Walczuk, Sławomir

doi:10.5604/20804075.1073049

Cited by 1 publication

(3 citation statements)

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“…Two oppositely polarised permanent magnets (3) seated in the body (1) and fi xed with caps ( 6) are the source of magnetic fi eld. The magnetic circuit is closed by a jumper (5). In Figure 7, both the jumper ( 5) and the magnets (3) are shown symbolically with their real dimensions omitted so as to make the illustration and the description of the diagnostic head structure clear.…”

Section: Measuring Head Characteristicsmentioning

confidence: 99%

“…The measurement system (Figure 10) consisted of a module for recording the dispersed magnetic fi eld, which was built based on the 3-axis digital magnetometer MLX90393 (1) and the ArduinoMega (2) microcontroller, and the displacement recording module which consisted of the incremental encoder Eltra ER30 (3) and the measurement card NI USB-6216 (4). The whole system was powered by the laboratory power supply Zhaoxin RPS-3005DB 30V 5A (5). Acquisition of the recorded signals was performed…”

Section: Measuring Head Characteristicsmentioning

confidence: 99%

“…Furthermore, the authors proposed an automated procedure applied to real measurement data and final results. In the article [5], the authors presented the results of their own research during which they applied non-destructive testing to assess the condition and age of aircraft landing gear components. The tests were carried out in accordance with the applicable legal regulations and standards.…”

Section: Introductionmentioning

confidence: 99%

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Construction and Verification for Metrological Properties of the Prototype Magnetic Head for Nondestructive Testing of Lift Guide Rail Wear under Test Conditions

Krakowski¹,

Ruta²,

Lonkwic³

et al. 2022

Adv. Sci. Technol. Res. J.

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The working surface of lift guide rails during operation is exposed to the destructive action of catchers under emergency braking conditions. In most cases, this surface is lubricated with grease, which makes it impossible to visually assess their local wear. The comfort of cabin movement on guide rails and thus the feelings of cabin occupants depend on the condition of guide rails. Therefore, the verification of lift guide rails wear under real conditions (in situ) is quite cumbersome. In order to assess them on a monthly basis, they would have to be completely cleaned and the excessively worn areas would have to be measured with universal measuring tools and re-lubricated. Such activities would only be a waste of time and lubricant. Therefore, the concept of a magnetic head was developed to assess the technical condition of lift guide rails. The head, which uses permanent magnets, makes it possible to measure the dispersed magnetic field of the guide rail cross-section. The areas of excessive wear show changes in this field, so it is possible to identify these areas without a need to remove lubricant from their surface. This paper presents both the detailed design of a developed head and the preliminary results of measurements using it. As the lift guide rails can have different dimensions depending on the lifting capacity, the developed head was equipped with inserts having the dimensions compatible with the guiding part width, thus enabling measurements that can be taken on different types of guide rails. The developed head and methodology allow measurements to be made without the need for disassembly, i.e. under in situ conditions. The results obtained in the laboratory have shown that the head concept and the measurement methodology are suitable for measurements in situ and perfectly fill the gap in this field of mechanical engineering.

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Section: Measuring Head Characteristicsmentioning

confidence: 99%

Section: Measuring Head Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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