齿比

在35岁以上的人中，牙周病引起的脱齿比龋齿还多。

In persons over 35 , periodontal disease causes the loss of more teeth than does dental caries , or decay .

利用准双曲面齿轮虚节锥设计方法，设计出两种可采用HFT切齿法加工的大速比准双曲面齿轮副（齿数比分别为3/37和4/37）；

By using the void pitch cone method , the hypoid gears of high speed ratio ( tooth number ratio : 3 / 37and 4 / 37 ) machined by HFT method were designed .

直线步进电机齿层比磁导的分析计算

Calculation and Analysis of Tooth-layer Permanence in Linear Pulse Motor

步进电机；牵入特性；齿层比磁导动态分析理论；

Stepping motors ; Pullin performances ; Tooth-layer permeability dynamic analysis theory ;

步进电动机的齿层比转矩和齿形优化

Tooth Layer Specific Torque and Tooth Layer Geometry Optimization of the Stepping Motors

注意到主动齿轮的齿数比冠状齿轮少。

Note that the input pinion is a smaller gear than the ring gear .

有第二高的齿轮齿数比。

Having the second highest gear ratio .

确定活齿传动比的转角分析法

The Turning Angular Analysis Method for Defining the Transmission Ratio of the Activity Tooth Transmission

步进电动机静转矩计算的齿层比磁导法的应用与发展

Application and Development of Teeth Layer Specific Permeability Method for Calculating Step Motor 's Static Torque

本文是步进电机齿层比磁导动态分析理论研究的第二部分。

This paper is the part ⅱ of the tooth-layer permeability dynamic analysis theory of step moter .

五相混合式步进电机的齿层比磁导稳态仿真模型

The Steady State Simulation of the Five Phase Hybrid Step Motor Using the . Tooth Layer Parameters

从而为以后此类电机的计算和分析提供了参考，对齿层比磁导法的应用做出了重要的发展和完善。

Consequently , an important development and improvement on the tooth-layer specific permeability method for step motor calculation is accomplished .

利用齿层比转矩作为齿形优化设计的目标，能获得在同一齿矩下合理的齿宽和齿高等齿层结构尺寸，以使电机达到较好的静态性能指标。

The optimized tooth-layer geometry parameters are achieved when the tooth-layer specific torque is used as the objective of the optimum design of the tooth-layer geometry .

提出了一个综合参数Gm&平均等抗胶合几何参数，并且给出了不同齿数比时该参数的具体数值；

An overall parameter Gm was presented as an antiscuffing geometric parameter , and its values of different tooth ratio of pinion / wheel were given .

齿层比磁导法是将定转子齿层场域进行有限元计算后，再将电机看作集中参数磁网络进行求解的方法，具有很好的精确性和实用性。

Tooth-layer rate permeance method , which is calculated by Finite Element Method ( FEM ), then regards motor as lumped magnetic circuit network to calculate .

当行星齿轮的齿数比大于2时，传动比小于1，传动自右到左为增速；

When the teeth ratio of planetary gear is greater than 2 and transmission ratio is less than 1 , the transmission will be speeded up from right to left .

三齿轮&四连杆组合机构具有运动的多样性，其运动性质取决于各杆的长度及齿轮的齿数比。

The three-gear and four-bar linkage combinatorial mechanism hasa variety of motions . Its kinematic character depends upon the length of links and the ratio of tooth number on gears .

在齿层比磁导法的基础上，研究反应式步进电动机的精确计算方法及机辅计算程序，并进行了实例验证。

It researchs the accurate calculating method and CAD prog tame of reaction stepping motors on basis of teeth-graded ratio permeance , and engaged in tested and verified by practice .

结论是：在此范围内，只有齿数比为2、3、5位小数时，才能实现齿数互质，其余都不能。

The conclusion was that within this extent , only when the ratio of gear tooth number is the fraction of 2 , 3 , 5 , digits can the mutual prime number be realized .

对于各种不同类型的共轭齿轮，齿轮比和速度比都可以通过大齿轮和小齿轮上的齿数比获得。

For conjugate gears of all types , the gear ratio and the speed ratio are both given by the ratio of the number of teeth on the gear to the number of teeth on the pinion .

文中采用基于齿层比磁导法建立的步进电动机机辅计算程序，定量分析转子永磁体材料和尺寸对电机性能的影响，以提高混合式步进电动机永磁体设计的精确性。

Here quantitatively analyzed the effect on motor rotor magnet material and sizes , through stepping motor CAD calculation program formed by method of teeth coating ratio of magnetic permeance , so as to improve its precision of the design .

以往由于计算机性能的局限性，传统的混合式步进电机的电磁场理论分析多以二维平面分析为主，如齿层比磁导法等。

Due to the limitation of computing performance of the computer , 2D FEM ( Finite Element Method ) was always used for the electromagnetic field analysis of the hybrid stepper motor in the past , such as tooth-layer specific permeability method .

用复数法得出了齿轮五杆机构任意齿数比的轨迹综合方程组，给出了齿数比为±1的数值实例。

The method of complex numbers is used to obtain the track integrated equation group for the ratio of any gear tooth numbers of the geared five bar mechanism with the practical example of ratio of gear tooth number of being ± 1 given .

本文以齿层比磁导法建立五相混合式步进电动机的非线性磁网络模型，并给出计算该类电机基本参数、性能的计算方法和计算机程序。

Applying the tooth layer specific permeability method , the authors in this paper introduce a non-linear equivalent magnetic circuit for a five-phase hybrid stepping motor and describe the calculating method and computer program for the calculation of the basic parameters and performance of the motor .

本方法是采用成型砂轮磨削齿型，比双碟型砂轮磨削生产效率要高。

The working efficiency by this method is higher than that by the method of double small dish emery wheel grinding .

开矩形槽时，槽与齿宽度之比在11时，可以取得较高的加工效率和较低的表面粗糙度。

When the width ratio of groove and tooth of rectangle groove is 1:1 , the highest finishing efficiency can be obtained .

结果表明，复合齿形齿轮比渐开线齿形齿轮具有更高的弯曲强度。

The results are compared to those of the standard involute gear and proof that the bending strength of the composite profile tooth is higher than that of involute one .

实验室化学分析结果：病牛齿氟含量比正常平均值高4～5倍（2260ppm；正常平均值为418ppm）。

3 ) Results of laboratory chemical analyses : Fluorine content of affected teeth was 4 & 5 times higher than normal ( 2260 ppm , while the normal average value is 418 ppm ) .

分析了一种甘蔗压榨机齿轮传动的特点，并提出基于行星架和齿圈转矩比为定值的保证功率二分支均匀的方法。

This paper analyses the feature of sugarcane mill gearing and proposes the method to ensure uniform distribution of power between two branches based upon the constant torque ratio of planet carrier and annular gear .

试验结果表明，冷挤压花键齿面硬度比心部高34%，已相当于调质后硬度。

The experimental results showed that the hardness of tooth surfaces of extruded splines is increased by 34 % than that in the core , which is equivalent to the hardness of seats treated by tempering .