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关键词： 现代设计技术   汽车离合器   操纵式离合器  

摘要： 本文针对汽车离合器行业发展情况展开分析,结合现代设计技术、汽车离合器相关内容,通过研究并行工程技术、计算机辅助设计技术、先进质量技术、设计试验技术在汽车离合器行业发展中的具体应用,以及注重双质量飞轮研究、扩大行业发展规模、合理筛选实力企业、搭建有序市场环境等策略,其目的在于提升对现代设计技术的认知,促进汽车离合器行业经济的快速发展.

关键词： 双离合器   对偶钢片   温度   AMESim   仿真  

摘要： AMESim软件平台上以湿式双离合器对偶钢片为对象建立离合器片间温度一维仿真模型,同时搭建湿式双离合器钢片温度测试台。以该温度测试台的大量测试数据作为依据对离合器温度仿真模型进行参数校正,校正后的离合器温度仿真模型可以研究湿式双离合器在该整车工况下对偶钢片温升情况。

关键词： 自动配药装置   间歇机构   电磁铁  

摘要： 根据市场调研，市场上现有出售的“自动智能提醒电子药盒”仅能实现时间自动提醒的功能，而缺少如：能够从几种药物中选取不同需要（有些药物一天一次、有些一天两次或者多次及隔天一次等）的智能配制等功能;也就是说，现存的此类产品没有达到智能化的最高要求，特别针对记忆不好、智力下降的老年人。家用自动配药装置通过机械结构与电路系统的结合，不仅实现吃药时间的提醒，并能按要求安全、可靠的完成每次设定药物的配制（药物种类的不同组合）;从而方便使用者完成一天或者多天的服用，以更好地服务于老年人、服务于社会家庭。

关键词： DCT自动变速器   压力异常   诊断方法  

摘要： DCT自动变速器是近年来国内市场运用最为广泛的变速器之一,在市场应用过程中,离合器压力异常是较为常见的故障。文章从双离合器控制方式、压力异常影响因素等方面展开分析,研究双离合器压力异常故障诊断方法。

关键词： 电磁离合器   工作沟槽   压力角   接触应力   仿真  

摘要： 电磁扭杆离合器工作沟槽既是离合器传递力矩的关键结构,又是影响弹性扭杆组件结合-分离的重要部位。以某新型电磁扭杆离合器为研究对象,提出了工作沟槽优化设计方法。首先通过理论分析计算得到钢球与工作沟槽结合状态时的接触应力;然后利用有限元分析软件ANSYS Workbench进行仿真验证,通过比较理论计算值和仿真分析结果,进一步对接触应力和压力角进行校核。结果可为下一步动力学分析做准备。

关键词： 双模式液压机械传动装置   离合器   切换时序   优化  

摘要： 为改善双模式液压机械传动装置(DHMT)模式切换品质,运用正交试验及极差分析法对切换过程中多个离合器的切换时序进行优化。在分析DHMT传动原理与模式切换过程的基础上,建立模式切换过程及切换品质评价指标模型,提出了一种基于正交试验及极差分析的DHMT离合器切换时序优化方法,以参与模式切换过程的多个离合器的切换时序为影响因子设计正交试验表,进行正交试验仿真,并对仿真结果进行极差分析,得到各离合器切换时序对各评价指标的影响程度,综合平衡各项指标后得出DHMT离合器切换时序优化方案组合。仿真结果表明:参考本文研究对象,基于离合器时序优化方案的模式切换过程冲击度为6.15 m/s3,低于17.64 m/s3的国内标准,滑摩功为2.8 kJ,切换时间为1.05 s,均在合理范围之内。试验结果表明:试验与仿真结果接近,且变化趋势一致,验证了所建模型的正确性,并进一步说明通过优化离合器切换时序可有效提高DHMT模式切换品质。研究结果可为制定双模式液压机械传动装置模式切换过程控制策略提供理论参考。

关键词： 高速插秧机   久保田   长期存放   滤清器   补充说明   避雨   化油器   离合器  

摘要： 1长期存放注意事项(1)收藏时,选择避开日光直射、避雨、通风良好的场所保管。(2)请排掉燃料箱、燃料滤清器滤芯和化油器中的汽油。(3)补充说明:(1)长期收藏时,使插秧爪处于取苗前的状态,插秧机降至最低位置,请勿给浮舟施加外力,以免变形;(2)将各离合器手柄置于"合"的状态,油门手柄放到最低位置;(3)请务必盖上插秧机盖罩。

关键词： electrorheological (ER) fluid   ER clutch   hydrodynamic clutch   viscous clutch   mathematical model   experimental evaluation  

摘要： The paper presents a mathematical modelling of a combined hydraulic clutch consisting of a hydrodynamic clutch and viscous clutches operating with electrorheological fluid and validates the mathematical model via an experimental evaluation. An electric field is generated in some of the clutches consisting in the combined hydraulic clutch, and it influences the electrorheological working fluid to alter characteristics of the clutch. The mathematical model formulated in this work, which is intended for analysis of different design solutions, is verified on the basis of the results achieved from bench testing. Based on the assessment of modelling errors, it is confirmed that the formulated mathematical model can be successfully employed in building clutches of this type applicable to torque transmission system.

关键词： Clutch outer gear hub   Inner tooth   Cold extrusion process   Numerical simulation analysis   Confirmation experiments  

摘要： In this study, the clutch outer gear hub with inner tooth shapes was formed in five steps associated with three processes to pre-form the cup-shaped blank and two extrusion processes to perform the inner tooth shapes. The extrusion processes were the focus of this investigation because the dimensional accuracy of the inner tooth was the primary consideration to control the automobile transmission functionality. The cold extrusion process of the clutch outer gear hub was simulated by the finite element software DEFORM-3D, and the influences of process parameters such as the entrance angle of extruding punch, the thickness of initial blank, and the length of calibration band on forming load, tooth filling, and stress distribution were investigated. The simulation results show that the rounded corner of inner tooth in the clutch outer gear hub is fully filled, the effective stress and the forming load are relatively small with the entrance angle of extruding punch of 30 degrees, the thickness of initial blank of 6.0 mm, and the length of calibration band of 10 mm. Finally, the experiments were carried out by the cold extrusion forming of the clutch outer gear hub. The results prove the feasibility of the cold extrusion process and the correctness of the numerical simulation results.

关键词： Neel-type magnetic skyrmions   Off-axis electron holography   Lorentz transmission electron microscopy  

摘要： Magnetic skyrmions are complex swirling spin structures that are of interest for applications in energy-efficient memories and logic technologies. Multilayers of heavy metals and ferromagnets have been shown to host magnetic skyrmions at room temperature. Lorentz transmission electron microscopy is often used to study magnetic domain structures in multilayer samples using mainly Fresnel defocus imaging. Here, off-axis electron holography is used to obtain in-focus electron optical phase images of Neel-type domains and skyrmions in an Ir/Fe/Co/Pt multilayer sample. The preparation of the sample, reconstruction of the holograms and influence of sample tilt angle on the signal-to-noise ratio in the phase images are discussed. A good agreement is found between images of individual skyrmions that are stabilized using an external magnetic field and simulated images based on theoretical models of Neel-type skyrmions.