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轮胎摩擦特性与胎面胶性能关系的研究 总被引:3,自引:0,他引:3
不同状态路面特别是潮湿/冰雪路面上,轮胎的摩擦特怀直接受胎面胶性能的影响。基于摩擦学原理,提出了轮胎磨擦析的分类形式,系统研究了轮胎磨擦特性和胎面胶性能间的关系。对正确解胎面磨擦力产生机理,以及对新型胎面产的研制和开发具有参考价值和实际意义。 相似文献
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汽车转向时纯滚动轮胎侧向摩擦力分析研究 总被引:2,自引:0,他引:2
冯永伟 《机械制造与自动化》2003,(6):40-41,45
普通汽车转弯时,至少有一只车轮有滑动现象,地面对汽车侧向摩擦力下降,致使产生,整体侧滑而发生危险。纯滚动汽车能很好地解决这一问题,使汽车在弯道上行驶时更加安全。 相似文献
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利用摩擦力显微镜(FFM),对由等离子体增强化学气相法沉积的类金刚石(DLC)薄膜的纳米摩擦性能进行了试验研究。用原子力显微镜(AFM)观察了DLC薄膜样品的表面形貌,同时测定了其粘附力值。从外加载荷、扫描速度和湿度的角度分析了薄膜的摩擦特性。 相似文献
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世界轮胎制造商的主要目标是高效生产稳定、高质量的轮胎。大约有80%的轮胎部件是直接或间接由挤出方法生产的。 相似文献
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轮胎是叉车的主要组成部分,多数叉车采用弹性较好的充气轮胎。以实心轮胎代替充气轮胎,叉车的动力性能和制动性能略有降低,但仍符合有关标准的要求;另外,可改善叉车的平稳性。 相似文献
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水溶性复合硼酸酯抗磨性能影响因素的分析 总被引:5,自引:3,他引:5
本文合成了水溶性复合硼酸酯添加剂,借助于四球试验考察了烷醇胺,醇,羧酸和硫化物对复合硼酸酯抗磨的影响。结果表明,烷醇胺是影响硼酸酯抗磨性能的主要因素;不同的醇所生成的硼酸酯其抗磨性能不同;硼酸酯与羧酸复合具有雷同效应;含硫硼酸酯可进一步提高硼酸酯的抗磨性能。 相似文献
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对国内外采用较多的A字架轮胎试验台进行运动学分析,发现该试验台在复合姿态角下,侧偏角、侧倾角、轮胎印迹中心存在偏移的现象,依据ISO轮胎坐标系的定义,采用空间解析几何方法推导出偏移量计算公式,计算结果表明:在大的复合姿态角下,各偏移量不可忽略。为有效解决该问题,提出一种新型结构6自由度轮胎试验台:采用多体动力学欧拉角旋转的方法,对新型轮胎试验台在不同姿态下的6个电缸长度进行仿真;分析6个电缸姿态角下的控制精度,并对6自由度平台的电缸进行空间上重新布置。结果表明:新型结构6自由度轮胎试验台在复合姿态角下各物理量无偏移,能任意控制轮胎的姿态,同时该新型结构中6个电缸布置的新方案提高轮胎姿态角的控制精度。 相似文献
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基于VB的SolidWorks二次开发的研究与实践 总被引:7,自引:0,他引:7
介绍了三维CAD系统SolidWorks的二次开发机制和相关术语,结合轮胎花纹的三维成型实例,阐述了用VB调用SolidWorks API函数来实现对SolidWorks的功能访问。 相似文献
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The current research of tire aerodynamics mainly focus on the isolated and simplified tread tire.Compared with the real complex pattern tire,the tread pattern structure and deformed profile of a loaded tire has a greatly influence on tire aerodynamic drag.However,the mechanisms of the isolated loaded tires with different tread patterns effects on the aerodynamic drag are subjects worthy of discussion.The purpose of this study is to experimentally and compu-tationally investigate the aerodynamic characteristics of three tires 185/65 R14 with different patterns under loaded.A wind tunnel test model was first established using three-dimensional(3D)printing with a ratio of 1∶1,and the pres-sure coefficients Cp of the three tires with different patterns are measured.The paper then conducted computational fluid dynamics(CFD)simulations for analyzing the pressure and flow characteristics.The accuracy of CFD simulation is verified by comparing the simulation results with the test results of pressure coefficients Cp,and they are of good consistency.While,the general analysis of pressure coefficients Cp results of the three tires indicates high-pressure area on the windward surface,and occurrence of low-pressure area on the leeward surface,the pressure coefficients Cp of all three tires decreased firstly and then increased along in the air flow direction.The authors finally analyzed the effect of tread patterns on the flow field around the tire and revealed the differences between flow characteristics and aerodynamic drag.The results show that,angle of tire lateral groove has great effect on the flow field characteristics such that;the more the angle of lateral groove agrees with the air flow direction,the less the flow separation and flow vortices,and a minimum observable aerodynamic drag.The research provides a guidance for the design of low aerodynamic drag tires,and helps to illustrate the impact of tire aerodynamics on the car body in the future. 相似文献
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The electrical and frictional properties of axially grooved oil-impregnated sintered-metal bearing (porous metal bearing) with varying loads and speeds were measured. The results were compared with the performance of bearings without grooves and conventionally used ball bearings. The test results showed that the frictional values of the porous bearings were lower than those of ungrooved bearings and ball bearings, and that the porous bearings operated in a full-hydrodynamic lubrication regime. The values of rating current, starting time and jitter revealed that the grooved-bearing had better electrical characteristics than the ungrooved bearing as well as the ball bearing. From the endurance tests on start-stop and continuous operating, it was confirmed that this bearing could be mass-produced for use in a laser scanner unit. 相似文献
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介绍了两种不同基体材料的试件及试验系统,分析了在不同埋设条件下复合结构中NiTi超弹丝传感性能的差异情况。 相似文献
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轮胎生产过程MES系统研究与应用 总被引:1,自引:0,他引:1
首先分析了轮胎生产过程以及轮胎企业制造执行系统的特点,并结合制造执行系统的定义,提出了本系统的架构原理,接着从硬件和软件2个方面进一步阐述了系统的基本架构及实现系统需要考虑和解决的关键问题。最后从数据采集、质量管理、设备管理和生产调度4个主要模块详细地描述了系统实现的主要功能,并通过此系统实现了轮胎企业信息的综合化,提高了企业的竞争力。 相似文献