Assessment of Uneven Wear of Freight Wagon Brake Pads
This study deals with the problem of uneven wear of brake pads of wagons caused by a set of structural, dynamic, technological and operational factors. It has been found that an uneven distribution of the brake pad pressure force leads to higher maintenance costs and lower braking efficiency. The ma...
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| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/12/6860 |
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| author | Sergii Panchenko Juraj Gerlici Alyona Lovska Vasyl Ravlyuk |
| author_facet | Sergii Panchenko Juraj Gerlici Alyona Lovska Vasyl Ravlyuk |
| author_sort | Sergii Panchenko |
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| description | This study deals with the problem of uneven wear of brake pads of wagons caused by a set of structural, dynamic, technological and operational factors. It has been found that an uneven distribution of the brake pad pressure force leads to higher maintenance costs and lower braking efficiency. The main causes of uneven wear are worn kinetostatic units, differences in the geometric parameters of pads, and imperfections in the lever transmission design. A method for optimizing the distribution of the pressure force using weight coefficients and the Lagrange function has been developed; it reduces the uneven wear of brake pads to 8–10% compared to that of a typical wagon bogie brake system, which is 20–35%. The experiments conducted have shown that for a mileage of 74,400 km and with the air distributor in empty mode, the wear of the pads is 19.6–28 mm, while in the loaded mode it amounts to 27.53–38.04 mm. The stress state of brake pads was determined with consideration of the weight coefficients. It was found that for abnormal wear of brake pads, their strength is not observed. The strength of the wheel when interacting with an abnormally worn pad has also been assessed. The resulting stresses are 1.5% higher than those that occur when the wheel interacts with the pad with nominal dimensions. The results of the research will contribute to the database of developments to be used for designing of modern structures of tribotechnical pairs of rolling stock and increasing the efficiency of railway transport. |
| format | Article |
| id | doaj-art-52e39c4e7e204dc0a3aad887db178888 |
| institution | Matheson Library |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-52e39c4e7e204dc0a3aad887db1788882025-06-25T13:26:39ZengMDPI AGApplied Sciences2076-34172025-06-011512686010.3390/app15126860Assessment of Uneven Wear of Freight Wagon Brake PadsSergii Panchenko0Juraj Gerlici1Alyona Lovska2Vasyl Ravlyuk3Department of Automation and Computer Telecontrol of Trains, Ukrainian State University of Railway Transport, Feuerbach Square 7, 61050 Kharkiv, UkraineDepartment of Transport and Handling Machines, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, SlovakiaDepartment of Transport and Handling Machines, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, SlovakiaDepartment of Wagon Engineering and Product Quality, Ukrainian State University of Railway Transport, Feuerbach Square 7, 61050 Kharkiv, UkraineThis study deals with the problem of uneven wear of brake pads of wagons caused by a set of structural, dynamic, technological and operational factors. It has been found that an uneven distribution of the brake pad pressure force leads to higher maintenance costs and lower braking efficiency. The main causes of uneven wear are worn kinetostatic units, differences in the geometric parameters of pads, and imperfections in the lever transmission design. A method for optimizing the distribution of the pressure force using weight coefficients and the Lagrange function has been developed; it reduces the uneven wear of brake pads to 8–10% compared to that of a typical wagon bogie brake system, which is 20–35%. The experiments conducted have shown that for a mileage of 74,400 km and with the air distributor in empty mode, the wear of the pads is 19.6–28 mm, while in the loaded mode it amounts to 27.53–38.04 mm. The stress state of brake pads was determined with consideration of the weight coefficients. It was found that for abnormal wear of brake pads, their strength is not observed. The strength of the wheel when interacting with an abnormally worn pad has also been assessed. The resulting stresses are 1.5% higher than those that occur when the wheel interacts with the pad with nominal dimensions. The results of the research will contribute to the database of developments to be used for designing of modern structures of tribotechnical pairs of rolling stock and increasing the efficiency of railway transport.https://www.mdpi.com/2076-3417/15/12/6860brake padabnormal wear of the padstressed state of the padtraffic safetyrailway transport |
| spellingShingle | Sergii Panchenko Juraj Gerlici Alyona Lovska Vasyl Ravlyuk Assessment of Uneven Wear of Freight Wagon Brake Pads Applied Sciences brake pad abnormal wear of the pad stressed state of the pad traffic safety railway transport |
| title | Assessment of Uneven Wear of Freight Wagon Brake Pads |
| title_full | Assessment of Uneven Wear of Freight Wagon Brake Pads |
| title_fullStr | Assessment of Uneven Wear of Freight Wagon Brake Pads |
| title_full_unstemmed | Assessment of Uneven Wear of Freight Wagon Brake Pads |
| title_short | Assessment of Uneven Wear of Freight Wagon Brake Pads |
| title_sort | assessment of uneven wear of freight wagon brake pads |
| topic | brake pad abnormal wear of the pad stressed state of the pad traffic safety railway transport |
| url | https://www.mdpi.com/2076-3417/15/12/6860 |
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