传动

However, Pro/E has a limitation in simulating chain transmission, it can simulate linear and circular motion but not curvilinear motion, so types like bicycle chain transmission can't be simulated by Pro/E

但是PROE在链传动仿真方面有重大缺陷落，不能解决链传动的曲线运动仿真，而只能进行链传动的直线和圆弧运动仿真，因此在类似于自行车传运链这类的不规则的链传动仿真将无法进行

It broke through the traditional reducer thinking and combined the advantages of moving axis and dead axle driving speed reducer .

三环减速器为重庆钢铁设计研究院开发的一种新型传动装置，它突破了传统减速器构思原理，结合了传统的动轴传动减速器与定轴传动减速器的优点，是一种新型高效的传动装置。

The new kind of transmission theory introduced in this article has been applied for patent (the application number is 200410012992.6) Some fundamental theory of the end face harmonic gear drive of oscillating teeth is investigated in this paper, which can benefit the design of the product and the popularization of the patent.

这种新型的传动装置属于空间的活齿传动机构，可以从根本上克服传统的径向谐波齿轮传动中柔轮的变形与其承载能力之间的矛盾，并可增加同时啮合的齿数，加大齿轮的模数，从而可以在保留径向谐波齿轮传动所有优点的基础上，使其所传递的功率增加数十倍。

Twist-roller friction drive is a new kind of feed drive.

扭轮摩擦传动是一种新型的传动机构，既属于摩擦传动又属于螺旋传动。

The features to evaluate the tooth contact quality such as the location of the contact point on the tooth surface, clearance between the meshing tooth surfaces, curve of the transmission error and the path of the contact point are investigated. The accurate geometric representation with non-uniform rational B spline of the worm and the wheel tooth surface is presented then the corresponding program is developed.

根据平面包络环面蜗杆传动的创成方法，建立了包含加工误差的蜗杆和蜗轮的齿面方程，分析了平面包络环面蜗杆传动和平面二次包络环面蜗杆传动的刚性啮合特性如误差对接触点的位置、齿面间隙、传动误差曲线和接触点在齿面上的轨迹的影响。

Thus, to study tooth surface curvature is significant. However, from the published information, the curvature of face gear drives hasn′t been well studied until now. Based on the knowledge of differential geometry, a method for calculating principal curvature and principal directions for face gears is established, and thus the principal v...

文中利用微分几何原理推导了面齿轮传动的齿面主曲率与主方向，由此得出面齿轮传动中诱导法曲率的两个主值；开发了相应的程序；进行了实例计算；分析了传动中的主要参数对曲率的影响，所获得的结论对面齿轮传动的强度计算与分析具有参考价值

The paper introduces the basic structure and transmission principle of push rod rack drive and gives the formula and recommendatory value of the main parameters of the push rod rack drive,which provides a theoretical basis for its design and manufacture.

介绍了推杆齿条传动的的基本结构和传动原理，给出了推杆齿条传动主要参数的设计公式与推荐值，为该传动的设计及加工制造提供了理论依据

To match the load characteristic of shoe tree CNC machine tool's transmissionsystem more reasonably ,minimize the moment of inertia and react to the change ofvelocity and acceleration in every axis quickly ,this paper introduces a method ofbuilding the mathematics model based on motor′s load to optimize the transmissionsystems ,distribute the total speed rate and analyse the transmission systems to chosethe best transmissionscheme.

为了实现鞋楦机床数控进给传动系统负载特性的更好匹配，使各轴能够快速地响应速度和加速度的变化，建立了基于电机负载的传动系统数学模型，分析了各个相关动力参数对电机负载的影响，进行了传动系统速比的优化、进行了载荷的匹配、确定了最佳的传动方案和动力参数以实现电机的负载最小。

The results showed that the drive efficiency of the worm helical gear can be improved a lot, which nearly reach to the level of the worm and wheel drive, presently, this show us a beautiful prospect of the engineering application of the worm helical gear drive.

结果表明，通过斜齿轮的齿廓修形，可以使蜗杆斜齿轮的传动的效率得到提高，接近甚至达到蜗杆蜗轮传动的传动效率，从而为蜗杆斜齿轮传动的工程应用打下了良好的基础。

The results reveal that, in some cases, the efficiency of helical gear is not as good as that of worm and wheel drive ; however, the efficiency of the worm helical gear drive in certain torque and the scope of rotational speed is still more close to that of worm and wheel drive.

结果发现虽然斜齿轮与蜗杆的传动效率在试验中不如蜗杆蜗轮传动，但是在一定的转矩和转速范围内，蜗杆斜齿轮传动的效率还是较接近蜗杆蜗轮传动。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。