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三、锥齿轮的实际基本齿廊 1.锥齿轮范成法加工中采用是的“8字啮合”齿形产形齿轮。这种产生齿轮的轮齿法截面为直线形齿廓。以直齿产形齿轮为例,其齿侧面是一个压力角为а的过产形轮中心O的平面,它与 相似文献
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为了分析和改善等基圆齿锥齿轮在实际工况下的承载能力、传动性能,对其进行齿面接触分析(TCA)模拟锥齿轮齿面接触印痕和传动误差。在不考虑安装误差的情况下对锥齿轮同时进行齿线和齿廓修形,分析齿线和齿廓修形参数的改变对锥齿轮传动误差以及齿面接触区域变化的影响,通过调整修形参数改善齿轮的啮合特性,实现较好润滑性能和传动平稳性的目的。通过一对修形后的等基圆锥齿轮的加工和滚检,验证了TCA修形程序的正确性,为该型齿轮的啮合性能分析提供了理论依据和实验基础。 相似文献
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《机械传动》2013,(2):36-40
针对直齿锥齿轮在工作中的啮合干涉冲击和"端啮"现象,提出正交设计的思想对齿轮进行等距修形的优化研究,并介绍等距修形原理及工艺。为优化修形效果,找出等距修形量、修形高度及修形位置这3个最影响修形效果的要素,对各个要素各选取3个水平进行正交试验设计,并通过SolidWorks建立精确的齿轮三维实体模型,利用ANSYS/LS-DYNA进行齿轮动态接触有限元分析,确定各个因素对等距修形效果影响的重要程度,进而获得最优等距修形参数。通过仿真分析,说明优化后的等距修形不仅能有效降低齿轮啮合干涉、冲击及振动,还可以消除"边缘效应",均化齿向分布载荷,提高了齿轮的承载能力,具有齿廓和齿向同时修形的综合修形效果,对于完善直齿锥齿轮等距修形理论具有参考价值。 相似文献
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内啮合章动弧齿锥齿轮齿面数学模型推导过程较为复杂。为了建立不同齿廓章动锥齿轮模型并进行加载接触分析,利用通用法向基本齿廓建立了假想媒介冕齿轮齿面通用数学模型。根据冕齿轮与章动内啮合弧齿锥齿轮的啮合关系,推导得到适于不同齿廓的章动弧齿锥齿轮齿面通用数学模型。再以渐开线与双圆弧为法向基本齿廓,分别建立了渐开线和双圆弧两种齿廓的章动弧齿锥齿轮齿面模型及其三维模型。利用有限元软件分别对高低功率、不同齿廓的章动内啮合弧齿锥齿轮进行了加载接触分析。结果表明,负载大小对渐开线弧齿锥齿轮的加载接触特性影响较大;双圆弧弧齿锥齿轮相对于渐开线弧齿锥齿轮具有承载能力更大、传动更平稳的优点。 相似文献
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STUDYONDOUBLECIRCULARARCPROFILESPIRALBEVELGEARTRANSMISSIONSTUDYONDOUBLECIRCULARARCPROFILESPIRALBEVELGEARTRANSMISSIONLiJinbao;... 相似文献
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Vilmos Simon 《Mechanism and Machine Theory》2009,44(7):1420-1435
A method for the determination of optimal tooth modifications in spiral bevel gears based on improved load distribution and reduced maximum tooth contact pressure and transmission errors is presented. The modifications are introduced into the pinion tooth-surface by using a head-cutter with bicircular profile and with optimal diameter. In the optimization of tool parameters the influence of relative position errors of the mating gears is included.By using the computer program developed for load distribution calculation, the influence of head-cutter parameters and relative position errors of the mating gears on tooth contact and transmission errors is investigated. Based on the results obtained, the radii and the position of the circular tool profile arcs and the cutter diameter for pinion teeth finishing were optimized. By applying the optimal tool parameters, the maximum tooth contact pressure is reduced by 45% and the maximum angular position error of the driven gear by 60%, in regard to the spiral bevel gear pair with a pinion manufactured by a cutter of straight-sided profile and of diameter determined by the commonly used methods. 相似文献
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以齿轮啮合原理为基础,阐述了球面渐开线螺旋锥齿轮齿廓的形成机理,建立了螺旋锥齿轮齿面点坐标参数方程,构建了格里森制螺旋锥齿轮数学模型.利用基于Pro/E参数化建模方法,创建了螺旋锥齿轮单齿齿形,用阵列操作,建立了完整的螺旋锥齿轮三维实体造型,并通过运动仿真验证了该建模的精确性,为螺旋锥齿轮设计与制造研究提供了一种参数化设计方法. 相似文献
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基于双圆弧齿轮的齿形特点 ,结合弧齿锥齿轮的加工原理 ,进行双圆弧弧齿锥齿轮的切齿啮合分析 ,得到了切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的通用齿面方程表达式 相似文献
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弧齿锥齿轮接触特性的概率分析 总被引:1,自引:0,他引:1
弧齿锥齿轮齿面接触特性受到传动系统中许多随机因素的影响,概率分析可对齿面接触中的随机特性进行量化描述。本文针对某航空发动机弧齿锥齿轮传动系统,将传递功率、转速、转子不平衡量及支承刚度等作为基本随机变量,通过对系统进行动态概率计算,获得了齿轮安装基点变形的统计规律。将概率分析引入齿面接触分析技术中,研究了在齿轮安装基点随机变化过程中齿面接触域和传动误差的概率特性,计算了齿面稳定接触的可靠性。 相似文献
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弧齿锥齿轮的齿面主动设计 总被引:16,自引:0,他引:16
齿面印痕和传动误差对齿轮传动的性能起着决定作用,针对齿面印痕和传动误差,提出弧齿锥齿轮点啮合齿面主动设计的方法。该方法突破了传统齿轮设计的局限性,采用“局部共轭原理”和“局部综合法”,并依据弧齿锥齿轮的加工原理,使齿轮设计人员能够按照要求的传动性能来设计齿面的形状,并可在摇台结构的铣齿机进行加工。齿面主动设计能保证齿面在整个啮合过程中满足预先设计的传动误差和齿面接触路径的要求,从而达到对齿面啮合质量的全程控制,它为弧齿锥齿轮副设计提供新的方法和途径,这对于高速和重载齿轮以及有特殊要求的齿轮的设计具有十分重要的意义。 相似文献
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螺旋锥齿轮是机械中的重要的传动装置.基于章动运动,推导了双圆弧螺旋锥齿轮齿面方程,建立了章动传动中冕齿轮的三维模型.进一步建立了整个章动传动的三维模型.完成了章动传动的运动和动力仿真. 相似文献
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Pinion tooth surface generation strategy of spiral bevel gears 总被引:1,自引:0,他引:1
Aviation spiral bevel gears are often generated by spiral generated modified(SGM) roll method.In this style,pinion tooth surface modified generation strategy has an important influence on the meshing and contact performances.For the optimal contact pattern and transmission error function,local synthesis is applied to obtain the machine-tool settings of pinion.For digitized machine,four tooth surface generation styles of pinion are proposed.For every style,tooth contact analysis(TCA) is applied to obtain contact pattern and transmission error function.For the difference between TCA transmission error function and design objective curve,the degree of symmetry and agreement are defined and the corresponding sub-objective functions are established.Linear weighted combination method is applied to get an equivalent objective function to evaluate the shape of transmission error function.The computer programs for the process above are developed to analyze the meshing performances of the four pinion tooth surface generation styles for a pair of aviation spiral bevel gears with 38/43 teeth numbers.The four analytical results are compared with each other and show that the incomplete modified roll is optimal for this gear pair.This study is an expansion to generation strategy of spiral bevel gears,and offers new alternatives to computer numerical control(CNC) manufacture of spiral bevel gears. 相似文献
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In this paper, loxodromic-type normal circular-arc spiral bevel gear is proposed as a novel application of the circular-arc tooth profile at the gear transmission with intersecting axes. Based on the principle of molding-surface conjugation, the study develops a mathematical model for the tooth alignment curve and the computational flow at the design stage to enable the generation of the tooth surface. Machining of the tooth surface is then carried out to determine the interference-free tool path of the numerical control (NC). Moreover, a pair of loxodromic-type normal circular-arc spiral bevel gears is manufactured on computer numerical control (CNC) machine tools. The proposed theory and method are experimentally investigated, and the obtained results primarily reflect the superior performance of the proposed novel gear. 相似文献