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Load Carrying Capacities of the Coated Gear in Ultra-high Vacuum and Establishment of Inspection System to Tooth Surface Failure.

涂层齿轮超高真空承载能力及齿面失效检测系统的建立。

基本信息

批准号：
08650183
负责人：
NADANO Hiromasa
金额：
$ 1.47万
依托单位：
Kure National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

The frictional and wear characteristics, and ratio of gear frictional loss torque to transmitted torque of the stainless steel gears (SUS440C) of which the surface layr was thermally diffused after being Snplated were investigated by a power-circulating gear machine under the conditions of grease lubrication and dry friction. For the case of grease lubrication, the gear was lubruicated with the base grease of perfluro-polyether and the grease in which MoS2 additives were mixed at the rate of 30 mass% in the base grease. The tests were run in air and in vacuum of about 10^<-4> Pa.Further, to clarify the effect of the diffused layr on the stress at the tooth fillet, the bending fatigue test of the gear teeth was carried out. The following results were obtained ;(1) In the case of the tests in vacuum, the time to reach destructive surface failure of the gears with diffused layr when lubricated with the grease (MoS2 additives : 30 mass%) was about 30% larger than that without the addtitives.(2) The time to reach destructive surface failure of the gears with the diffused layr in air was about 57% smaller than that in vacuum.(3) The ratio of gear frictional loss torque to transmitted torque of the gears decreased with increasing the sum of the number of revolution while the number of revolution of the pinion reached 10^5, and was between 0.01 and 0.015.(4) The bending fatigue strength of the gears with the difused layr was about 450 Mpa, and was about 50 Mpa larger than that without the diffused layr.

在功率循环齿轮试验机上研究了表面镀锡后进行热扩散处理的不锈钢齿轮（SUS 440 C）在脂润滑和干摩擦条件下的摩擦磨损特性及齿轮摩擦损失扭矩与传递扭矩的比值。对于油脂润滑的情况，用全氟聚醚的基础油脂和其中MoS 2添加剂以30质量%的比率混合在基础油脂中的油脂润滑齿轮。试验在空气和约10^ Pa的真空中进行<-4>。此外，为了阐明扩散层对齿圆角处的应力的影响，进行了齿轮齿的弯曲疲劳试验。结果表明：（1）在真空试验中，添加30%（质量分数）MoS_2润滑脂时，扩散层齿轮达到破坏性表面失效的时间比不添加添加剂时延长约30%。(2)在空气中扩散层齿轮达到破坏性表面失效的时间比真空中减少约57%。(3)当小齿轮转速达到10^5时，齿轮摩擦损失转矩与齿轮传递转矩之比随着转速之和的增加而减小，并在0.01 ~ 0.015之间。(4)渗层齿轮的弯曲疲劳强度约为450 MPa，比无渗层齿轮的弯曲疲劳强度提高约50 MPa。