汽车交流发电机转子电磁性能的检测

随着交流发电机输出功率的不断提高，必须改善其转子总成的电磁性能。为了检测转子总成的电磁性能，根据霍尔效应原理设计研制出转子总成磁场强度检测仪。该检测仪能判断出转子总成中附加气隙的大小，从而可在整机合装前就把电磁性能不合格的转子总成挑选出来，减少了工时和零件的浪费，提高了经济效益。     

机油泵内转子总成胶接紧固技术的研究

机油泵内转子总成在装配过程中应用乐泰６０９固持厌氧胶，通过紧固技术的可行性分析及各项试验，验证了乐泰固持胶的胶接紧固作用及用化学固持力紧固内转子总成的可行性。     

P2混动架构耦合机构ISG电机用转子毂总成的设计开发

转子毂总成是一种用于ISG电机转子的安装以及与耦合机构其他部件连接的毂类零件。转子毂的设计会对ISG电机本身动力性及经济性产生一定的影响。文章以某P2架构耦合机构ISG电机上所用的转子毂总成为例,简要分析并总结了该类零件的开发设计要素。     

奇瑞轿车发电机检修及常见故障排除

奇瑞轿车使用的发电机有两种型号:JFZ1913-4型和JFZ1813ZB型.发电机主要由转子、定子、皮带轮及电压调节器组成.发电机的结构如图1所示,在发电机的后端盖上安装有滚动轴承,元件板总成上安装有8个整流二极管和3个励磁二极管,定子总成上绕有三相绕组,转子上绕有励磁绕组.     

起动机的检查与维修

汽车每行驶5000-10000km或发动机工作一个季度后，应对起动机进行一次全面的检查和维护。重点检查和维护的部件有转子总成、定子总成、单向离合器及电磁开关等。[第一段]     

某轻客车型后暖风主机总成性能提升

详细阐述利用CFD仿真数值分析的方法,通过对某轻客车型后暖风主机总成的壳体结构的优化,最终达到提升后暖风主机总成的制热性能的目标。     

汽车助力转向管路总成的设计方法

助力转向管路总成的设计是否合理严重影响汽车助力转向系统的性能。详细介绍了汽车助力转向管路总成的结构和作用,结构设计的主要内容、原则和注意事项,橡胶管、金属管和管接头密封圈等主要材料的性能要求和选用方法,性能设计的主要内容和原则,还简要介绍了汽车助力转向管路总成的发展趋势。     

EQ153汽车起动机转子总成焊接工艺

介绍了ＥＱ１５３汽车起动机转子总成原采用浸锡焊工艺，在使用过程中易发生转子甩锡，导致整机烧毁质量事故，为此，选择一种经济、合理、有效地技术对产品结构及工艺进行优化。     

细长轴转子总成的加工工艺

电机转子总成的加工工艺在电机制造行业属传统典型的加工工艺,但有些精度要求高的产品按传统典型的加工工艺方法加工,往往很难达到工艺技术要求。图1是我公司新开发的一种水泵电机的转子总成,转轴是台阶轴,长度较长且它的形位精度却非常高:(1)转子外圆对两轴承位轴心线的径向跳动≤0.04mm;(2)轴伸花键档对两轴承位轴心线的径向跳动≤0.04mm且花键的对称度≤0.03mm。图11.传统典型工艺简介:按上述传统工艺方法加工,存在如下问题:1).车削转子外圆时(用鸡心夹以两顶针定位),径向跳动出现超差,最大跳动≥0.10mm。2).铣削花键时装夹困难且加工出…     

真空助力器-制动主缸总成综合性能测试系统的研制

提出了汽车真空助力器—制动主缸总成的综合性能测试项目,采用机电气液一体化的原理方法,研制出了总成综合性能测试系统,详细论述了测试系统各组成部分。大量测试试验证明该系统测试方法合理、功能齐全、自动化程度高、测试结果准确可靠。     

结构-电磁激励下某电驱总成噪声控制

针对某电动汽车电驱总成的噪声问题，依据电驱总成车内噪声产生机理，进行整车状态声振特性测试，运用不同工况组合下的频谱特征和阶次特征等分析方法，识别出该电驱总成噪声问题为结构共振和电磁激励所致。针对结构共振问题，考虑电驱总成结构耦合特性、电机材料复杂多样性和线圈绕组质量，建立电驱总成有限元分析模型，求解出电驱总成的模态和振动响应，并通过敲击法模态试验得到模态参数进而对有限元模型进行验证，在此基础上以模态应变能为依据对电驱总成结构的局部刚度进行优化，提升结构共振频率，降低共振风险。针对电磁激励问题，以电驱总成中的永磁同步电机为研究对象，建立电磁仿真分析模型，以影响磁通密度的转子槽口的槽形、槽宽、槽深和槽间角度4个因素建立正交试验设计表，通过极差值得到各因素对齿槽转矩和输出转矩的影响水平，最后以降低齿槽转矩、加工工艺简单和对输出转矩影响小为目标，运用16组具有代表性的电磁方案，完成256个参数组合的寻优，并对优化方案进行了数值仿真计算。研究结果表明：优化方案的改善效果较显著；研究可为电动汽车车内噪声改善提供试验技术支持，并为电驱总成的结构共振噪声和电磁噪声控制提供方法参考。     

Experimental investigation using CFD for thermal performance of ventilated disc brake rotor

In the present work, different ventilated disc brake rotor configurations were analysed to enhance the heat transfer rate and obtain the uniform temperature distribution in the rotor. CFD code used in this work was validated at using experimental results obtained by conducting experiments on a test rig. The experimental analysis was performed to calculate the mass flow rate and heat dissipation through the rotor. Further, different types of rotor configurations viz. straight radial vane (SRV), tapered radial vane (TRV), alternate long and short vane (ALSV), variable diameter circular pillars (VDCP) were considered for the analysis. A rotor segment of 20° was considered for the numerical analysis due to its rotational symmetry. CFD results were in good agreement with the experiments. The maximum deviation of the numerical results were about 12 % from the experimental results. It is found from the analysis that among the different types of rotor configurations; variable diameter circular pillars (VDCP) rotor gives better rate of heat dissipation with more uniform temperature distribution in the flow passages. Hence for modern high speed vehicles VDCP rotor may be more appropriate.     

Angular position error detection of variable reluctance resolver using simulation-based approach

The variable reluctance type resolver is widely used in an electric motor for hybrid electric vehicles as a rotor position sensor. The purpose of this paper is to present a simulation-based approach capable of determining a more accurate rotor shape of variable reluctance resolver in order to cut the time and cost of its development before testing a physical prototype. For the verification of the simulation-based approach to the position error detection of rotor, experiments for 8XVR resolver were conducted. Based on this approach, an optimal salient-pole rotor shape of 4X-VR resolver is proposed.     

Development of aluminum metal matrix composites (Al-MMC) brake rotor and pad

Improvement in fuel consumption rate requires a reduction in vehicle weight. Research and development for materials substitution in the brake rotor, from the conventional cast iron to aluminum, has been undertaken. In this study, we developed aluminum metal matrix composites brake rotor and pads, which have equivalent braking effects and wear resistance to those of the conventional cast iron rotor, by optimization of the quantities and the particle diameter ratio of hard particles used for the rotor and the pad.     

Dynamic analysis of spiral bevel geared rotor systems applying finite elements and enhanced lumped parameters

The dynamics of spiral bevel gears like most high-speed precision gears employed in motor vehicles and off highway equipments are substantially affected by the structural characteristics of the shafts and bearings. The lumped parameter model is one of the common tools applied to perform gear dynamic analysis. Even though the lumped parameter approach is computationally fast and conveniently efficient, it typically uses limited number of coordinates and may not fully account for the shaft-bearing structural characteristics accurately. In this analysis, the finite element formulation, that can generally represent more complete characteristics of the shaft-bearing assembly, is employed to enhance the current lumped parameter synthesis theory using the concept of effective mass and inertia elements. Computational output shows that the enhanced lumped parameter synthesis model is capable of predicting sufficiently accurate dynamic response when compared to the direct dynamic finite element calculations, and much more precise response than previous lumped parameter results, especially when the gear dynamics are associated with the pinion or gear bending modes. Even though this analysis focuses primarily on the spiral bevel geared rotor systems, the proposed methodology and analysis results can be easily extended to other types of gears.     

路面铣刨机铣削载荷特性分析与试验

为了给路面铣刨机铣刨系统参数匹配提供参考,以LXH1000型全液压路面铣刨机为对象,对路面铣刨机铣削载荷特性进行了研究。采用数学解析法,研究了刀具铣削运动轨迹,建立了刀具铣削厚度及铣刨转子累积铣削厚度随铣刨转子转角变化的模型,分析了影响路面铣刨机铣削载荷的因素,并通过现场铣刨试验进行了验证。结果表明：路面铣刨机铣刨转子累积铣削厚度具有高频周期性变化的特点,铣刨转子旋转速度和刀具数量决定了铣刨转子累积铣削厚度变化的频率,路面铣刨机行走速度和铣刨转子旋转速度决定了铣刨转子累积铣削厚度的均值,但铣刨转子累积铣削厚度的周期性变化与铣削载荷的波动之间没有明显联系。     

稳定土路拌机作业质量的动力学分析

利用碰撞原理，分析了稳定土路拌机转子、罩壳与物料之间的撞击过程。得到适当加大路拌机转于、罩壳质量与刚度可以提高机器作业质量的结论。     

弹性环阻尼器对涡轮增压器转子动力性能影响研究

以高速涡轮增压器滚珠轴承转子系统弹性环阻尼器(ERSFD)为研究对象,采用有限元分析以及挤压油膜理论对弹性环支承刚度、油膜压力场分布、油膜刚度阻尼以及滚珠轴承转子系统动力学特性等进行了分析研究,并与挤压油膜阻尼器(S F D)进行对比分析.研究发现,弹性环阻尼器的交叉刚度和阻尼很小,有效地改善了挤压油膜阻尼器刚度阻尼自由度耦合问题,刚度阻尼的非线性得到明显的抑制.采用六凸台弹性环阻尼器与滚珠轴承串联组合的增压器进行了台架试验,并与动力学计算结果进行了对比分析.     

一种测量车用涡轮增压器转子轴向力的新方法

介绍了电阻应变片的工作原理,提出了应用电阻应变片来测量涡轮增压器轴向力的方法,并进行了某涡轮增压器的轴向力测量试验。所提出的涡轮增压器转子轴向力测量方法可为止推轴承的结构设计提供依据。     

考虑浮环支承的涡轮增压器转子系统动力学行为研究

车用涡轮增压器作为一种高速旋转机械是由浮动轴承支承的。在高速高温工况下油膜的强非线性作用使转子系统在较大的转速范围内表现出复杂的动力学现象。本文利用双油膜短轴承模型结合涡轮增压器转子离散化模型进行建模和数值仿真,分别从浮环转速比、特征频谱、油膜偏心率三个方面比较分析来描述涡轮增压器全浮动轴承支承的转子系统的失稳特征。