Research onto the crowned design of rock bit cylindrical roller bearing

In this study, the crowned shape and size of cylindrical roller are accomplished based on contact analysis and mechanical property of the cylindrical crowned roller bearing is also researched. Firstly, a solution method for finite length cylinder contact is built with slice method.

本文在接触分析的基础上针对圆柱滚动体轴承的修形方式、凸度量大小以及滚动体修形之后对轴承的力学性能影响等方面做了研究。

The Research on the Crowned Rollers of Cylindrical Roller Bearings

圆柱滚子轴承滚动体修形技术的研究

Based on a systematical discussion on the theoretical research methods of crowned design in roller bearing, several crowned types adopted in the engineering practice are introduced in this paper, and research direction in the future is illustrated based on the authors' experience.

在系统沦述滚动轴承滚子凸度设计研究方法的基础上，介绍了工程实际中采用过的几种滚子凸型，给出相应的母线方程和表面间隙表达式，并阐述了今后的研究方向。

Theoretical Research on Crowned Design of Roller Bearing

滚动轴承滚子凸度设计的理论研究进展

Control of Speed With Frequency Conversion for Crowned Taper Roller Superfinisher

圆锥滚子凸度超精研机的变频调速控制

By analyzing and computing the force of big rib of bearing and the force of cone and cup raceway, the contact stress between the tapered roller and bearing raceway is computed and the form of crowned roller is selected;

通过分析计算轴承的大挡边以及内、外滚道的受力，计算滚子和轴承滚道间的接触应力，进行滚子凸度选形；

A new crowned roller of cylindrical roller bearings

圆柱滚子轴承滚动体新的修形曲线

The gathered teenagers suddenly break into cheers as they crowd round to get a closer look, patting Collin on the back and shaking his hand.

聚拢过来的少年们也突然欢呼起来，纷纷跟他拍肩、握手。

Don't crowd round him.

别挤在他的周围。

He soon gathered a crowd round him.

他很快便集合了一群人在他周围。

When the wind was getting stronger and stronger, the sailors immediately crowd on more sail.

当风越来越大时，水手们立刻升起更多的帆。

Crowd on sail The ship tore ahead through mountainous waves.

扯更多的帆来加快船速船穿过巨澜快速地前进。

The "Crowding factor" can be used to characterize flocculation or dispersion of fibers in water suspension.

利用拥挤因子可以较好地评价与判断纤维在水中的分散性和絮聚性。

We use the crowding factor both in the rule and message system and the process of the genetic algorithm.

定理表明在分类器系统中，规则的权值是否处于稳定状态，对遗传算法的学习过程很大影响。

Conclusion ( 1) Insufficient basal bone width and excessive tooth size were the main causes of tooth crowding and tooth removing treatment.

结论：1.基骨宽度不足、牙齿过大是造成牙列拥挤和拔牙矫治的主要原因。

On the upper arch moderate to severe dental crowding is corrected by changes in anterior lip inclination and arch width when crowding cases were treated with Damon self-ligating system. 3.

Damon自锁托槽技术对上颌中重度牙列拥挤解除后表现为牙弓宽度的改变和前牙出现唇倾。

This article is to investigate the clinical effect of mild dental crowding cases applying bracketless invisible appliance by manual tooth arrangement.

本文旨在探讨应用人工排牙法制作无托槽隐形矫治器治疗轻度牙列拥挤的临床效果。

Objective To study the effects of environmental and genetic factors on dental crowding, and to further study on the influencing factors on permanent dentition.

目的通过双生子研究遗传和环境因素对恒牙列拥挤形成所起的作用，以进一步研究恒牙列拥挤的影响因素。

A Twin Study of Dental Crowding on Permanent Dentition

恒牙列拥挤的双生子研究

An Investigation of Food Influenced on Dentition Development and Dental Crowding in the Only Child

独生子女人群饮食因素对口颌系统发育影响的调查研究