Assessment of the technical condition of lift guides using a magnetic field

Lonkwic, P.; Krakowski, Tomasz; Ruta, Hubert

doi:10.1088/1742-6596/2130/1/012003

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…The gradient of tangential gradB Tx and normal gradB Nz components for the corresponding magnetic flux leakage component was determined as the absolute value of a derivative of the mean recorded magnetic induction components ( 5) and (6). Also, the resultant gradient gradB TxNz , calculated as the product of the gradients of tangential gradB Tx and normal gradB Nz (7) components, was determined.…”

Section: Measurement Results and Their Analysismentioning

confidence: 99%

“…This software required absolute determination of the correlation between wear processes in fatigue testing of T-T straps and the results of magnetic testing in order to develop the final criteria for acceptance or rejection of this T-T strap structure. In publication [7], the use of a pioneering concept of the magnetic head is described for assessing the technical condition of lift guide rails that are the running track of lift equipment. The preliminary tests were performed on the test stand designed for this purpose.…”

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confidence: 99%

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Use of Magnetic Flux Leakage to Diagnose Damage to a Lift Guide Rails System with Reference to the Sustainability Aspect

Lonkwic,

Krakowski,

Ruta

2024

Sustainability

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The scientific objective of the conducted experimental research was to find an answer as to whether the application of magnetic flux leakage would be an effective tool for assessing the technical condition of lift guide rails in which the loss of thickness of the guide part is damage resulting from the brake whose operation destructively affects the surface shown. In particular, the scientific objective was to investigate the potential of this method in the context of quantitative assessment of the degree of damage featuring small increments in depth at the level of tenths of a millimetre. The conducted research was also aimed at determining the correlation of the effect of damage type with the nature of the signal recorded. The article presents the results of our own research, obtained from experiments on the use of magnetic flux leakage (MFL) to diagnose damage occurring on lift guide rails. During operation, lift guide rails are exposed to contact with the friction elements of brakes, resulting in the violation of their surfaces. Damage to the working surfaces of guide rails increases the vibration of the device, noise and wear of other components of the lift, such as guide rails. Currently, diagnostics of lift guide rails are not carried out, and their replacement depends on their technical condition. However, from an economic point of view, there are situations wherein their condition allows their use without their replacement with new ones. This was the main factor that guided the authors; we used a diagnostic head of our own design for the tests. The obtained measurement results showed that magnetic flux leakage can be used with great success to diagnose damage to guide rails. The results obtained in the laboratory shall be further developed in the form of research on correlating the signals obtained from magnetic sensors and the size of the damage, which shall eventually allow for a final quantitative assessment of guide rails regarding their technical condition. The conducted research fits into the scope of sustainable development by reducing the need for the consumption of electric energy and the emission of harmful substances into the atmosphere in the overall production balance. This will be made possible by implementing the developed head in industrial practice in the context of assessing the need to replace guide rails with new ones. The economic and environmental efficiency that is the basis of sustainable development in the context of lifts can be achieved at the modernisation stage by repeated (further) use of as many components as possible. An example of this is the guide rail system, the reuse of which is possible after a prior assessment of its wear and tear.

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Section: Measurement Results and Their Analysismentioning

confidence: 99%

mentioning

confidence: 99%

Use of Magnetic Flux Leakage to Diagnose Damage to a Lift Guide Rails System with Reference to the Sustainability Aspect

Lonkwic,

Krakowski,

Ruta

2024

Sustainability

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“…The method itself received patent protection in the Republic of Poland and the first prize during the competition organised by Elevator World in the Project of Year 2020. In the publication [3], the authors presented the results of laboratory tests in which they used their own concept of a magnetic head for the assessment of technical condition of lift guide rails. Since it is quite difficult to assess the technical condition of guide rails under operating conditions, the proposed method was validated on a laboratory bench and its results gave positive results.…”

Section: Introductionmentioning

confidence: 99%

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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Assessment of the technical condition of lift guides using a magnetic field

Cited by 2 publications

References 15 publications

Use of Magnetic Flux Leakage to Diagnose Damage to a Lift Guide Rails System with Reference to the Sustainability Aspect

Use of Magnetic Flux Leakage to Diagnose Damage to a Lift Guide Rails System with Reference to the Sustainability Aspect

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

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