| 同步器摩擦传动机理建模与材料参数影响研究 |
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| 引用本文： | 张志刚,余晓霞,侯亚斌,欧欣.同步器摩擦传动机理建模与材料参数影响研究[J].中国公路学报,2019,32(8):174-182. |
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| 作者姓名： | 张志刚 余晓霞 侯亚斌 欧欣 |
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| 作者单位： | 1. 重庆理工大学 汽车零部件先进制造技术教育部重点实验室, 重庆 400054;
2. 重庆青山工业技术中心, 重庆 402761 |
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| 基金项目： | 国家自然科学基金项目（51205432）；重庆市重点产业共性关键技术重大主题专项（cstc2017zdcyzdzx0076）；重庆市科学与前沿技术研究项目（cstc2017jcyjAX0143）；重庆理工大学研究生创新基金项目（ycx2018210） |
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| 摘 要： | 为探明摩擦副材料参数对同步器同步过程的影响，建立了油膜压力、微凸体压力、同步环轴向力和同步转矩4个模型。利用4阶Runge-Kutta法对油膜厚度和转速差进行耦合求解，求得同步过程中油膜厚度、转速差、黏性转矩、粗糙接触转矩以及总转矩变化曲线。对所建模型进行试验验证后，利用所建模型研究了摩擦材料渗透性、摩擦副表面联合粗糙度、摩擦副当量弹性模量、摩擦因数变化规律对同步过程的影响。结果表明：摩擦材料渗透性减小导致油膜厚度变化速率下降，黏性转矩和粗糙接触响应延迟，同步时间延长；摩擦副表面联合粗糙度增大致使最小油膜厚度增大，黏性转矩峰值减小，粗糙接触转矩响应加快，同步时间缩短；摩擦副当量弹性模量增大导致最小油膜厚度增大，粗糙接触转矩增大，同步时间缩短；正斜率摩擦因数下粗糙接触转矩大于负斜率摩擦因数下粗糙接触转矩，同步时间相对较短。
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| 关 键 词： | 汽车工程 同步器 试验验证 摩擦机理 材料性能 影响因素 |
| 收稿时间： | 2018-09-25 |
Friction Drive Mechanism Model and Effects of Material Parameters on a Synchronizer |
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| ZHANG Zhi-gang,YU Xiao-xia,HOU Ya-bin,OU Xin.Friction Drive Mechanism Model and Effects of Material Parameters on a Synchronizer[J].China Journal of Highway and Transport,2019,32(8):174-182. |
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| Authors: | ZHANG Zhi-gang YU Xiao-xia HOU Ya-bin OU Xin |
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| Affiliation: | 1.Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, China;
2. Chongqing Qingshan Industrial Technology Center, Chongqing 402761, China |
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| Abstract: | To determine the effects of friction performance parameters on synchronizer synchronization, four models of oil film pressure, asperity contact pressure, synchronous ring bearing capacity, and cone torque were established. The four-order Runge-Kutta method was used to solve the coupling of oil film thickness and speed difference, and change curves of the oil film thickness, rotational speed difference, viscous torque, asperity contact torque, and total torque were obtained in synchronization. The effects of the permeability friction material, co-roughness of the friction pair, equivalent modulus of the friction pair, and law of friction coefficient in synchronization were studied after testing the model. The results show that the permeability of the friction material and change rate of oil film thickness both decrease, the viscosity torque and rough contact response are delayed, and the synchronization time lengthens. In addition, the co-roughness of the friction pair and minimum oil film thickness both increase, the peak of the viscous torque decreases, the asperity contact torque is quickened, and the synchronization time is shortened. Moreover, the equivalent elastic modulus of the friction pair, minimum oil film thickness, and asperity contact torque all increase, and the synchronization time is shortened. The results also show that the asperity contact torque of the slope friction coefficient is greater than that of the negative slope friction coefficient, and the synchronization time is relatively short. |
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| Keywords: | automotive engineering synchronizer test verification friction mechanism material properties influencing factors |
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