查询词典 friction coefficient

According to experiment study of anti corrosive-wear capability about tube and rod friction pair which are made of ordinary materials and surface treatments,some straight figures were drawn about selecting friction pair's corrosive-wear ratio.

对抽油井常用管杆材料以及表面处理后的管杆材料摩擦副耐磨蚀性能进行了试验研究，结果表明：J55与N80普通油管与QT60接箍配合时，接箍磨蚀最小；而无论与哪种接箍对磨，涂层油管最耐磨，并且与非调质钢(FG20)接箍磨蚀时，接箍最耐磨。

Possible cause is that top roller bearing failure "" flufenoxuron, cots from being subjected to excessive friction, or other mechanical reasons, such as inking rollers rupture Peel, with water in chrome-plated iron roller surface is "" Burr "" Peel, and so on, may cause abnormal COTS bear "" friction cause unexpected damage cot.

不定的来因是胶辊轴承生效&卡活&，胶辊秉承超度磨擦而毁坏，或是其它板滞上的来因，如串不朱软辊分裂起皮，带火镀铬铁辊暗不天有&毛刺&，&起皮&等，城市使胶辊秉承&否变态&磨擦造不败胶辊的否预期毁坏。

By experiments,three sources of the antilock friction moment and the static antilock friction performance on the Fe-based SMA locknut were tested separately,as a result the feasibility of the new-type nut was proved.

通过试验对铁基SMA螺母防松摩擦力矩的三个来源和静态防松性能分别进行了测定，从试验的角度证明了这种螺母的防松性能。

Since the last century, with the industrial and technological development in the theoretical study of friction further to the mid-century, the birth of a new adhesion of friction.

自上个世纪，随着工业和技术的发展，在理论学习中的摩擦，进一步向本世纪中叶，诞生了一个新的粘附摩擦。

By designing and selecting oils that minimised friction between the moving parts of the engine, it is possible to minimise the power and friction losses in an engine.

通过设计和选用适当的润滑油，可以减小发动机活动部件之间的摩擦，就可以降低发动机中的功率和摩擦损失。

In order to analyze force easily,we simplify the model of FA cyloid,taking no account of friction,supposing that there is the maximum of distortion in the largest arm of force,but in fact,friction must be exist and there is not always needle tooth in the largest arm of force.

为了便于分析受力，传统齿形简化FA针摆传动模型：不考虑摩擦因素、假定在摆线轮最大力臂处产生最大变形等，而实际上摩擦一定存在、在线轮最大力臂处未必有针齿存在。

The paper folding machine also consists of air-breathing into the paper and friction type feed two, the best selection of air-breathing into the paper-folding machine, because friction type feed easily damaged, as good as a digital business card printing and membership card making prints.

折页机的给纸部分又分为吸气式进纸和摩擦式进纸两种，最好选择吸气式进纸方式的折页机，因为摩擦式进纸容易损坏已印好的数码制卡和会员卡制作印品。

Firstly, saltating sand grains in various height layers mostly rotate clockwise; the rate of counterclockwise rotation changes from 16.7 to 33.3% for three different friction wind speed (u*= 0.67, 0.83, and 0.87 m/s). However, their mean rotational speeds were not significantly different, irrespective of whether the grains rotated clockwise or counterclockwise. The mean counterclockwise rotational speeds of sand grains for friction wind speed u*= 0.67, 0.83, and 0.87 m/s were 427, 519, and 604 rev/s, versus 429, 522, and 609 rev/s, respectively, in the clockwise direction.

首先，风沙流中各高度层内跃移沙粒旋转均以顺时针方向为主，逆时针方向旋转的沙粒数仅占总数的16.7-29.5%，但是无论逆时针还是顺时针旋转的沙粒，它们的平均旋转速度几乎没有差别(如u*＝0.67 m/s时，分别为427 rev/s和429 rev/s；u*＝0.83 m/s，分别为519 rev/s和522 rev/s；u*＝0.87 m/s，分别为604 rev/s和609 rev/s)；不同摩阻风速条件下各高度层内沙粒的旋转速度均服从Lorentzian分布。

The effect of the friction moment of bearings on performance is researched. The forming mechanic and influence factors of the friction moment of ball bearing are analyzed. Suitable clearness and groove radius of ball bearings are obtained by experiment and calculation. The relationship between starting moment of ball bearing and various lubricants is analyzed. The measure for reducing the starting moment of ball bearing is put forward, it is the theory basis and reference for ball bearing design of small power unit system.The system is an unstable system when the 24-station ball pen tip production machine is running because of various interferences. It is too hard to describe the system by linear method, so the nonlinear formulation must be used.

研究了小动力头系统轴承摩擦力矩对运转性能的影响，分析了球轴承摩擦力矩的产生机理及影响因素，采用实验和计算的方法得到了动力头球轴承的合理间隙及球轴承沟曲率半径，分析了各种润滑剂与球轴承启动力矩的关系，并提出了减小轴承启动力矩的措施，为小动力头系统的轴承设计提供了理论依据及实践参考。24工位笔头加工机械在笔头的生产加工过程中，由于受到各种因素的干扰是一个不稳定系统，其稳定性会发生一定变化，而且很难用线性方法表述。

Compact pentroof combustion chambers and high-strength pistons that are resin-coated to reduce friction, low-tension piston rings and a low-friction valve train that uses roller rocker arms also are important features of this engine, as is an Acoustic Control Induction System that changes the length of the intake manifold runners based on engine speed and throttle opening.

紧凑pentroof燃烧室和高强度的活塞是树脂涂层以减少摩擦，低张力活塞环和低摩擦气门，使用滚子摇臂也是这个引擎的重要特色，是一种声学控制感应系统这改变了进气长度发动机转速和节气门开度为基础的多方面的选手。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044