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To solve the problem for lacking a special mechanical transmission that could provide multiple outputs with high transmission efficiency and good lubrication in the modern industrial, a novel worm gear, named end face engagement worm gear, with multiple worm-wheel meshing is proposed for the first time. The essential parameters for the worm gear are optimized to enhance lubrication and meshing properties. Moreover, analysis of variance(ANOVA) is applied to determine the optimum levels and to determine the influence of parameters. The ANOVA results show that the novel end face engagement worm gear with multiple worm wheels provides high lubrication(the lubrication angle is more than 89°) and meshing performance(the induce normal curvature is less than 0.0002 mm~(-1)). The interaction between center distance and roller slant distance most strongly influences the lubrication angle(contributed 51.6%), followed by the parameters of center distance(contributed 25.0%), roller slant distance(contributed 16.4%), tooth angle of gear, gear ratio, and roller radius. In addition, roller radius most strongly influences the induced normal curvature(contributed 39.4%), followed by roller slant distance(contributed 15.2%), tooth angle of the gear(contributed 9.0%), center distance, and gear ratio. The proposed worm gear helps to enrich the no-backlash high precision worm drive and the optimal design method can provide a useful reference on performance improvement of other worm gear. 相似文献
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Modification design method for an enveloping hourglass worm gear with consideration of machining and misalignment errors 总被引:1,自引:0,他引:1
The influences of machining and misalignment errors play a very critical role in the performance of the anti-backlash double-roller enveloping hourglass worm gear(ADEHWG).However,a corresponding efficient method for eliminating or reducing these errors on the tooth profile of the ADEHWG is seldom reported.The gear engagement equation and tooth profile equation for considering six different errors that could arise from the machining and gear misalignment are derived from the theories of differential geometry and gear meshing.Also,the tooth contact analysis(TCA) is used to systematically investigate the influence of the machining and misalignment errors on the contact curves and the tooth profile by means of numerical analysis and three-dimensional solid modeling.The research results show that vertical angular misalignment of the worm wheel(Δβ) has the strongest influences while the tooth angle error(Δα) has the weakest influences on the contact curves and the tooth profile.A novel efficient approach is proposed and used to minimize the effect of the errors in manufacturing by changing the radius of the grinding wheel and the approaching point of contact.The results from the TCA and the experiment demonstrate that this tooth profile design modification method can indeed reduce the machining and misalignment errors.This modification design method is helpful in understanding the manufacturing technology of the ADEHWG. 相似文献
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作者们基于以下研究提出了精磨蜗杆的螺旋蜗杆传动的计算机设计和分析方法。1.滚刀的理论螺线表面是用一维面生成的。2.蜗杆表面与滚刀螺线表面相比齿廓和轴向为凸面。3.蜗杆的双凸面可局部承受接触和获得给定范围的传动误差的预先设计的抛物线函数。蜗杆传动的计算机设计可以显示和避免蜗杆齿面形成奇异点和齿棱。模拟双凸面蜗杆和蜗轮齿面的啮合和接触来确定支承接触轴线不对中和传动误差的影响。开发和应用数值解的计算机程序。数值计算实例说明所提供的开发原理。 相似文献
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M.De Donno F.L.Litvin 《传动技术(上海)》2001,15(3):38-42,47
作者们基于以下研究提出了精磨杆的螺旋蜗杆传动的计算机设计和分析方法。1.滚刀的理论螺线表面是用一维面生成的。2.蜗杆表面与滚刀螺线表面相比齿廓和轴向为凸面。3.蜗杆的双凸面可局部承受接触和获得给定范围的传动误差的预先设计的抛物线函数。蜗杆传动的计算机设计可以显示和避免蜗杆齿面形成奇异点和齿棱。模拟双凸面蜗杆和蜗轮齿面的啮合和接触来确定支接触轴线不对和传动误差的影响,开发和应用了数值的计算机程序。数值计算实例说明所提供的开发原理。 相似文献
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针对双自由度锥面包络圆柱蜗杆传动这种新型传动形式,从设计角度出发,提出了以最佳接触区为目标函数,对该蜗杆副齿形参数进行优化设计的方法。优化结果不仅使接触线的形状、分布等有利于动压油膜的形成,而且使其承载能力也有较大的提高。有利于这种新型蜗杆副齿形参数的选择。 相似文献
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建立了变位非正交面齿轮的加工坐标系和啮合坐标系,推导了变位小轮及变位非正交面齿轮的齿面方程,计算得到了面齿轮数值齿面,分析了变位对非正交面齿轮齿宽的影响。在变位的基础上研究了对小轮进行齿向鼓形修形,而面齿轮不修形的修形方式。分别对未变位、变位、变位加小轮齿向修形的三种非正交面齿轮传动形式进行考虑安装误差的轮齿接触分析。研究表明:随着变位系数增大,非正交面齿轮最小内半径、最大外半径及极限齿宽均减小;变位不影响非正交面齿轮副的接触规律;小轮齿向修形能降低接触轨迹对安装误差的敏感性,会引起幅值较小的直线型传动误差。 相似文献
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核电齿轮箱的良好润滑性能是核电循环泵可靠运行的重要保障,充分考虑齿面形貌和齿廓修形等因素对内/外啮合齿轮副的影响是准确评估其润滑特性的前提。建立典型工况下核电循环泵行星传动系统斜齿轮热弹流润滑模型,首先将斜齿轮副的啮合状态几何等效为圆锥滚子的接触问题,然后考虑斜齿轮接触变形和齿廓偏差,计算得到内/外啮合齿轮副接触区域不同位置的油膜厚度、承载压力、摩擦应力和闪温等参数。考虑齿面磨合作用,采用移动平均滤波方法对未经磨合的初始形貌进行光滑处理,分析了齿面形貌对润滑行为的影响,最后采取齿廓修形改善润滑特性。结果表明:粗糙度和齿廓修形均会对润滑特性产生明显的影响,齿面粗糙形貌会造成油膜厚度减小,进而影响其润滑特性,弱化润滑油膜的承载能力;通过齿廓修形可以改善齿轮啮合边界处的几何过渡,降低该区域的应力集中和表面温度,从而明显改善啮合线终端的润滑状态。 相似文献
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采用CAD三维造型技术与数值计算相结合的方法计算分析了各种加工误差及装配误差对TI蜗杆传动齿面接触的影响。其结果对有效提高TI蜗杆副的制造精度有指导意义。 相似文献
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对一种新型的蜗杆传动——端面蜗轮副分析和建立了数学模型,运用包络理论,建立了端面蜗轮副的通用齿面方程,分析计算了齿面的综合曲率。为这类蜗杆传动的研制和CAD系统的开发奠定了基础。 相似文献
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为了提高面齿轮的磨齿效率,采用不做齿向进给运动的大半径盘形砂轮磨齿得到的面齿轮具有近似齿面,然而该近似面齿轮与双向修形小轮的啮合性能不够理想.因此进一步通过啮合理论重新构造小轮齿面,并根据预设的啮合性能对该新构造的小轮齿面进行拓扑修形设计,以控制近似面齿轮传动的啮合性能.小轮的拓扑修形齿面采用盘形砂轮局部点共轭法磨齿加工,建立了小轮拓扑修形齿面与加工参数之间的线性方程.用实例说明了所提方法的应用,齿面接触分析结果与给定的啮合性能基本一致. 相似文献
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针对蜗杆砂轮磨齿机产生中凹齿形的问题,研究了蜗杆砂轮与工件的接触状态,分析了中凹齿形产生的机理.当重合度不是整数时,表明啮合过程中啮合齿面的对数在变化.啮合齿面的对数的变化会在齿面的法向方向产生一个交变力,这个交变力就是产生中凹齿形的主要原因.提出了防止中凹齿形产生的措施. 相似文献
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Load sharing and stress analysis of single enveloping worm gearing considering transmission errors 总被引:1,自引:1,他引:0
A. H. Falah A. H. Elkholy 《The International Journal of Advanced Manufacturing Technology》2008,37(3-4):211-220
A procedure, known as the slicing method, which has been developed earlier by the authors to estimate the load share of single
enveloping (cylindrical) worm gear drives and to calculate the instantaneous tooth meshing stiffness and stresses, is extended
in this study to investigate the effect of transmission error on loading and stresses. Tooth composite deflection caused by
bending, shearing, contact deformation and initial separation due to profile mismatch are determined in the analysis as well
as tooth stiffness variation during the course of contact of both the worm and the wheel. The elasticity theory was used to
calculate fillet stresses and deformation of both the worm and wheel. Numerical examples are presented to illustrate the response
of worm gear set in the presence of transmission error and under given loading conditions. The procedure was proven to be
safe and reliable in rating the load capacity and useful in the design of worm gear drives with compact size and high power
transmission. 相似文献
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TI 环面蜗杆砂轮磨齿原理 总被引:6,自引:1,他引:6
根据空间交错轴齿轮啮合理论,对TI环面蜗杆砂轮磨齿原理进行了理论研究,推导出了基本方程,分析了磨削渐开线直、斜齿圆柱齿轮时的接触线分布规律,并得到了齿面上不存在啮合界限线的判定条件,经微机模拟接触过程,表明此方法是一种高效的齿面磨削方法。 相似文献
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为了研究关键设计参数对平面包络内啮合蜗杆传动接触性能及承载能力的影响。基于齿轮啮合原理,构建平面包络内啮合蜗杆传动的空间齿面接触线方程,利用数值计算方法求得空间齿面接触线,并将其映射到蜗轮齿面,通过分析中心距、传动比、母平面倾角、蜗轮回转轴倾角、蜗轮转角、蜗杆分度圆系数、主基圆系数等不同参数对蜗杆齿面接触区域的分布情况,找出合理的设计参数范围,此外,根据初步分析结果,选取一组较为合理参数生成了平面包络内啮合蜗杆传动的三维模型。研究表明,传动比、母平面倾角、蜗轮转角对平面包络内啮合蜗杆传动的接触区域有较大影响,母平面倾角在18°~36°、蜗轮回转中心轴倾角在30°~54°、蜗轮转角在90°~138°之间取值时,平面包络内啮合蜗杆传动的具有较好的接触区域。研究结果为平面包络内啮合蜗杆传动的后续研究奠定了理论基础。 相似文献