Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle

The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement wa...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Daisuke SUZUKI [verfasserIn] Ken TAKAHASHI [verfasserIn] Yoshiaki OKAMURA [verfasserIn] Takafumi NAGATOMO [verfasserIn]

Format:	E-Artikel
Sprache:	Japanisch

Erschienen:	2022

Schlagwörter:	railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor

Übergeordnetes Werk:	In: Nihon Kikai Gakkai ronbunshu - The Japan Society of Mechanical Engineers, 2022, 88(2022), 910, Seite 22-00060-22-00060
Übergeordnetes Werk:	volume:88 ; year:2022 ; number:910 ; pages:22-00060-22-00060

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1299/transjsme.22-00060

Katalog-ID:	DOAJ028614542

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520			\|a The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value.
650		4	\|a railcar gear unit
650		4	\|a pinion bearing
650		4	\|a tapered roller bearing
650		4	\|a helical gear
650		4	\|a rolling element load
650		4	\|a bearing clearance
650		4	\|a endplay
650		4	\|a load distribution factor
653		0	\|a Mechanical engineering and machinery
653		0	\|a Engineering machinery, tools, and implements
700	0		\|a Ken TAKAHASHI \|e verfasserin \|4 aut
700	0		\|a Yoshiaki OKAMURA \|e verfasserin \|4 aut
700	0		\|a Takafumi NAGATOMO \|e verfasserin \|4 aut
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author_variant	d s ds k t kt y o yo t n tn
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allfields	10.1299/transjsme.22-00060 doi (DE-627)DOAJ028614542 (DE-599)DOAJ3f6d67ae82ea49c6871bac0a7942240b DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Daisuke SUZUKI verfasserin aut Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value. railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements Ken TAKAHASHI verfasserin aut Yoshiaki OKAMURA verfasserin aut Takafumi NAGATOMO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 88(2022), 910, Seite 22-00060-22-00060 (DE-627)1028882408 21879761 nnns volume:88 year:2022 number:910 pages:22-00060-22-00060 https://doi.org/10.1299/transjsme.22-00060 kostenfrei https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b kostenfrei https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 88 2022 910 22-00060-22-00060
spelling	10.1299/transjsme.22-00060 doi (DE-627)DOAJ028614542 (DE-599)DOAJ3f6d67ae82ea49c6871bac0a7942240b DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Daisuke SUZUKI verfasserin aut Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value. railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements Ken TAKAHASHI verfasserin aut Yoshiaki OKAMURA verfasserin aut Takafumi NAGATOMO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 88(2022), 910, Seite 22-00060-22-00060 (DE-627)1028882408 21879761 nnns volume:88 year:2022 number:910 pages:22-00060-22-00060 https://doi.org/10.1299/transjsme.22-00060 kostenfrei https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b kostenfrei https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 88 2022 910 22-00060-22-00060
allfields_unstemmed	10.1299/transjsme.22-00060 doi (DE-627)DOAJ028614542 (DE-599)DOAJ3f6d67ae82ea49c6871bac0a7942240b DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Daisuke SUZUKI verfasserin aut Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value. railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements Ken TAKAHASHI verfasserin aut Yoshiaki OKAMURA verfasserin aut Takafumi NAGATOMO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 88(2022), 910, Seite 22-00060-22-00060 (DE-627)1028882408 21879761 nnns volume:88 year:2022 number:910 pages:22-00060-22-00060 https://doi.org/10.1299/transjsme.22-00060 kostenfrei https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b kostenfrei https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 88 2022 910 22-00060-22-00060
allfieldsGer	10.1299/transjsme.22-00060 doi (DE-627)DOAJ028614542 (DE-599)DOAJ3f6d67ae82ea49c6871bac0a7942240b DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Daisuke SUZUKI verfasserin aut Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value. railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements Ken TAKAHASHI verfasserin aut Yoshiaki OKAMURA verfasserin aut Takafumi NAGATOMO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 88(2022), 910, Seite 22-00060-22-00060 (DE-627)1028882408 21879761 nnns volume:88 year:2022 number:910 pages:22-00060-22-00060 https://doi.org/10.1299/transjsme.22-00060 kostenfrei https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b kostenfrei https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 88 2022 910 22-00060-22-00060
allfieldsSound	10.1299/transjsme.22-00060 doi (DE-627)DOAJ028614542 (DE-599)DOAJ3f6d67ae82ea49c6871bac0a7942240b DE-627 ger DE-627 rakwb jpn TJ1-1570 TA213-215 Daisuke SUZUKI verfasserin aut Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value. railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements Ken TAKAHASHI verfasserin aut Yoshiaki OKAMURA verfasserin aut Takafumi NAGATOMO verfasserin aut In Nihon Kikai Gakkai ronbunshu The Japan Society of Mechanical Engineers, 2022 88(2022), 910, Seite 22-00060-22-00060 (DE-627)1028882408 21879761 nnns volume:88 year:2022 number:910 pages:22-00060-22-00060 https://doi.org/10.1299/transjsme.22-00060 kostenfrei https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b kostenfrei https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en kostenfrei https://doaj.org/toc/2187-9761 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 88 2022 910 22-00060-22-00060
language	Japanese
source	In Nihon Kikai Gakkai ronbunshu 88(2022), 910, Seite 22-00060-22-00060 volume:88 year:2022 number:910 pages:22-00060-22-00060
sourceStr	In Nihon Kikai Gakkai ronbunshu 88(2022), 910, Seite 22-00060-22-00060 volume:88 year:2022 number:910 pages:22-00060-22-00060
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topic_facet	railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor Mechanical engineering and machinery Engineering machinery, tools, and implements
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container_title	Nihon Kikai Gakkai ronbunshu
authorswithroles_txt_mv	Daisuke SUZUKI @@aut@@ Ken TAKAHASHI @@aut@@ Yoshiaki OKAMURA @@aut@@ Takafumi NAGATOMO @@aut@@
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callnumber-first	T - Technology
author	Daisuke SUZUKI
spellingShingle	Daisuke SUZUKI misc TJ1-1570 misc TA213-215 misc railcar gear unit misc pinion bearing misc tapered roller bearing misc helical gear misc rolling element load misc bearing clearance misc endplay misc load distribution factor misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
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topic_title	TJ1-1570 TA213-215 Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle railcar gear unit pinion bearing tapered roller bearing helical gear rolling element load bearing clearance endplay load distribution factor
topic	misc TJ1-1570 misc TA213-215 misc railcar gear unit misc pinion bearing misc tapered roller bearing misc helical gear misc rolling element load misc bearing clearance misc endplay misc load distribution factor misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
topic_unstemmed	misc TJ1-1570 misc TA213-215 misc railcar gear unit misc pinion bearing misc tapered roller bearing misc helical gear misc rolling element load misc bearing clearance misc endplay misc load distribution factor misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
topic_browse	misc TJ1-1570 misc TA213-215 misc railcar gear unit misc pinion bearing misc tapered roller bearing misc helical gear misc rolling element load misc bearing clearance misc endplay misc load distribution factor misc Mechanical engineering and machinery misc Engineering machinery, tools, and implements
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title	Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
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title_full	Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
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title_sort	load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
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title_auth	Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
abstract	The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value.
abstractGer	The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value.
abstract_unstemmed	The purpose of this paper is to understand the load state of pinion bearings used for a gear unit in an electric railway vehicle. For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value.
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title_short	Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle
url	https://doi.org/10.1299/transjsme.22-00060 https://doaj.org/article/3f6d67ae82ea49c6871bac0a7942240b https://www.jstage.jst.go.jp/article/transjsme/88/910/88_22-00060/_pdf/-char/en https://doaj.org/toc/2187-9761
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For this purpose, a system capable of measuring the rolling element load distribution of the pinion bearing in an actual gear unit was constructed, and the measurement was conducted under the same conditions as in an actual railway vehicle. Generally, tapered roller bearings are used for pinion bearings in a face-to-face arrangement, which has an axial clearance (endplay value). Therefore, the effect of the endplay value on the rolling element load distribution was investigated by changing the endplay value at specified values, larger values, and smaller values. As a result of measuring the rolling element load, it was found that the rolling element load tended to increase as the transmission torque of the gear unit increased. In addition, large rolling element loads occurred only when the endplay value was smaller than the specified value. The reason for this is that the axial thermal expansion of the pinion shaft exceeded the endplay value, and the bearing became pressurized. The bearing loads (radial and axial loads) were determined from the measured rolling element loads, and it was found that under conditions where the endplay value was smaller than the specified value, the axial load was significantly higher, which could cause a reduction in bearing life and wear of the bearing. Finally, the load distribution factor of the bearing was determined for each condition. It was observed that the load distribution factor decreased as the endplay value increased, and that for the same endplay value, the load factor tended to be smaller for the conditions with lower torque. It was also found that the load distribution of the rolling elements does not change significantly except under conditions where the endplay value is smaller than the specified value.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">railcar gear unit</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">pinion bearing</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">tapered roller bearing</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">helical gear</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">rolling element load</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">bearing clearance</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">endplay</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">load distribution factor</subfield></datafield><datafield 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Load state of tapered roller bearings used for pinion gear of gear units in electric railway vehicle

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