1993 Fiscal Year Final Research Report Summary
Study on Performance and Mechanism of Breakage of Solid Film Lubricants Lubricants of Gears
| Project/Area Number |
04650134
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
機械要素
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| Research Institution | Tottori University |
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Principal Investigator |
KOIDE Takao Faculty of Eng., Tottori Unvi., Assoc.Prof, 工学部, 助教授 (60127446)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGOE Haruo Faculty of Eng., Tottori Univ., Professor, 工学部, 教授 (60032009)
MIYACHIKA Kouitsu Faculty of Eng., Tottori Univ., Assoc.Prof, 工学部, 助教授 (30157664)
ODA Satoshi Faculty of Eng., Tottori Univ., Professor, 工学部, 教授 (50032016)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Gear / Vacuum / Friction / Wear / Efficiency / Solid Film Lubrication / Plastic |
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| Research Abstract |
The friction and wear characteristics of gears in vacuum were investigated. The gear testing machine of power circulating type with a vacuum chamber was developed, in which the coeffiiet of friction between the contacting tooth surfaces, and the temperatures of the gear teeth and the shaft can be measured under various running conditions. The running test for S45C, SUS440C, MoS_2 coated SUS440C, Duracon and Nylon gears were carried out in air and vacuum environment by using the gear tsting machine, and the coefficient of friction between the contacting tooth surfaces, the wear of the gear teeth and temerature changes of the gear teeth, the shaft, etc. were measured. On the basis of these tesults, the friction and wear characteristics of gears in vacuum were determined to a considerable extent.
The main results obtained from this investigation are summarized as follows.
1. The coeficient of friction of S45C gears in vacuum is larger than that in air, but that of SUS440C gears in vacuum is smaller and those of MoS_2 coated SUS440C, Duracon and Nylon gears in vacuum are almost equal to those in air.
2. The efficiency of S45C gears in vacuum is lower than that in air, but those of SUS440C, MoS_2 coated SUS440C, Duracon and Nylon gears in vacuum are almost equal to those in air.
3. The amounts of wear of S45C and SUS440C gears in vacuum are smaller than those in air, but those of MoS_2 coated SUS440C, Duracon and Nylon gears in vacuum are almost equa to those in air.
4. The life against the scoring of gears s improved considerably by coating the solid film lubricant on the tooth surfaces.
Thus the friction and wear characteristics of gears in vacuum was determined, and the useful data for the design of gears in vacuum environment obtained from this investigation.
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