Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions
Despite the high technical level of hoisting equipment purchased abroad, a catastrophic failure of the slewing bearings of these cranes occurs after 3-5 years of service instead of the regulated 15 years. The most characteristic are: wear of 6-polyamide cassettes, cages of gear teeth and turntabl...
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| Format: | Article |
| Language: | English |
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Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2024-11-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2024/%E2%84%964%20(192)%20(%D0%9E%D0%9D%D0%92)/22-28%20%D0%A1%D0%BB%D0%B0%D0%B4%D0%BA%D0%BE%D0%B2%D0%B0%20%D0%9B.%20%D0%90.,%20%D0%A4%D0%BE%D0%BA%D0%B8%D0%BD%20%D0%92.%20%D0%92..pdf |
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| author | L. A. Sladkova V. V. Fokin |
| author_facet | L. A. Sladkova V. V. Fokin |
| author_sort | L. A. Sladkova |
| collection | DOAJ |
| description | Despite the high technical level of hoisting equipment purchased abroad, a
catastrophic failure of the slewing bearings of these cranes occurs after 3-5 years
of service instead of the regulated 15 years. The most characteristic are: wear of
6-polyamide cassettes, cages of gear teeth and turntable; rolling elements falling
out of the turntable; squeezing out the sealing tape. To identify the hidden cause
of premature failure of the slewing rings of «Liebherr» cranes, the authors carried
out the experiment during loading and unloading operations, which shows the
tendency of warming up the elements of the slewing support, considering the cyclic
nature of the crane operation. It has been established that this process is linear
both for cassettes (polyamide 6 material), in which the rolling elements are located, and for the rolling elements themselves (bearing steel). For 5 loading cycles, the
rolling elements warm up to a 40 mm depth to a temperature of about 40-45° C.
The proposed working hypothesis allows identifing the hidden cause of premature
failure of the slewing support of «Liebherr» cranes operating in central Russia. A
change in the stress-strain state of the cassette is established, leading to an increase
in wear of the cassettes and rolling elements, since stresses arise between the end
of the roller surface and the cassette in the direction of the contact plane. |
| format | Article |
| id | doaj-art-dc5740d2652b424b9221b3ee49562902 |
| institution | Kabale University |
| issn | 1813-8225 2541-7541 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education |
| record_format | Article |
| series | Омский научный вестник |
| spelling | doaj-art-dc5740d2652b424b9221b3ee495629022025-02-03T12:03:21ZengOmsk State Technical University, Federal State Autonoumos Educational Institution of Higher EducationОмский научный вестник1813-82252541-75412024-11-014 (192)222810.25206/1813-8225-2024-192-22-28Modification of changes in the stress-strain state of crane slewing gear elements while operational conditionsL. A. Sladkova0https://orcid.org/0009-0008-6786-0386V. V. Fokin1https://orcid.org/0009-0003-0941-0217Russian University of TransportRussian University of TransportDespite the high technical level of hoisting equipment purchased abroad, a catastrophic failure of the slewing bearings of these cranes occurs after 3-5 years of service instead of the regulated 15 years. The most characteristic are: wear of 6-polyamide cassettes, cages of gear teeth and turntable; rolling elements falling out of the turntable; squeezing out the sealing tape. To identify the hidden cause of premature failure of the slewing rings of «Liebherr» cranes, the authors carried out the experiment during loading and unloading operations, which shows the tendency of warming up the elements of the slewing support, considering the cyclic nature of the crane operation. It has been established that this process is linear both for cassettes (polyamide 6 material), in which the rolling elements are located, and for the rolling elements themselves (bearing steel). For 5 loading cycles, the rolling elements warm up to a 40 mm depth to a temperature of about 40-45° C. The proposed working hypothesis allows identifing the hidden cause of premature failure of the slewing support of «Liebherr» cranes operating in central Russia. A change in the stress-strain state of the cassette is established, leading to an increase in wear of the cassettes and rolling elements, since stresses arise between the end of the roller surface and the cassette in the direction of the contact plane.https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2024/%E2%84%964%20(192)%20(%D0%9E%D0%9D%D0%92)/22-28%20%D0%A1%D0%BB%D0%B0%D0%B4%D0%BA%D0%BE%D0%B2%D0%B0%20%D0%9B.%20%D0%90.,%20%D0%A4%D0%BE%D0%BA%D0%B8%D0%BD%20%D0%92.%20%D0%92..pdfself-propelled jib cranedesign diagramsstress-strain stateslewing supportfailureswarm-upwearworking process |
| spellingShingle | L. A. Sladkova V. V. Fokin Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions Омский научный вестник self-propelled jib crane design diagrams stress-strain state slewing support failures warm-up wear working process |
| title | Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions |
| title_full | Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions |
| title_fullStr | Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions |
| title_full_unstemmed | Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions |
| title_short | Modification of changes in the stress-strain state of crane slewing gear elements while operational conditions |
| title_sort | modification of changes in the stress strain state of crane slewing gear elements while operational conditions |
| topic | self-propelled jib crane design diagrams stress-strain state slewing support failures warm-up wear working process |
| url | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2024/%E2%84%964%20(192)%20(%D0%9E%D0%9D%D0%92)/22-28%20%D0%A1%D0%BB%D0%B0%D0%B4%D0%BA%D0%BE%D0%B2%D0%B0%20%D0%9B.%20%D0%90.,%20%D0%A4%D0%BE%D0%BA%D0%B8%D0%BD%20%D0%92.%20%D0%92..pdf |
| work_keys_str_mv | AT lasladkova modificationofchangesinthestressstrainstateofcraneslewinggearelementswhileoperationalconditions AT vvfokin modificationofchangesinthestressstrainstateofcraneslewinggearelementswhileoperationalconditions |