查询词典 cam lechanism

Firstly, a new design method of cam profile has been developed by using finite terms of Fourier Series in the cycle of cam angle as the basic equation of cam profile, so the difficulty of base circle wave existing in the method of resonant cam design can be eliminated. On the other hand, the method proceeds from the acceleration of cam profile, which makes the acceleration not only smooth and continuous, but also easy to be controlled, and the cam profile with good performance can easily be acquired.

此方法用以凸轮包角为周期的富立叶级数有限项作为凸轮型线的基函数，可以免去谐波凸轮设计时控制基圆波动的困难；此方法又是从凸轮型线的加速度曲线入手进行设计，使型线加速度不但光滑、连续，而且形状容易控制，便于设计出动力性能优良的凸轮型线。

Initially, assuming that the contact between cam and tappet is"dry contart", a dynamics model of Hertzin contact stiffness and impact damping is established. Next, with dynamic load on cam—tappet pair from the model, an analysis is made both to unsteady EHD oil film in cam—tappet pair under condition of full and partial lubrtication and to wear characteristics of cam profile. then, according to the fact that the lubrication in cam—tappet contact surface is EHD lubrication, taking the interaction between stiffness and damping of unsteady EHD oil film and rigidity of solid object contact into account, a dynamics equation of valve train relating to the dynamic effect of EHD oil film is built up and solved. Consequently, a further study is made on the dynamic characteristics of valve train under interaction of EHD oil film dynamic behavior and the problem of EHD lubrication in cam—tappet pair. Finally, the dynamic effect of full and partial EHD oil film is studied accordingly.

首先，通过对凸轮—挺杆接触为&干接触&的假设，建立了考虑赫兹&接触刚度&和冲击&阻尼&的配气机构动力学模型，用由此求得的凸轮—挺杆表面动载荷对凸轮—挺杆进行了全膜状态和部分膜状态非稳态弹流润滑分析，并研究了凸轮轮廓的磨损规律；然后，是在凸轮挺杆表面存在弹流动压油膜这一事实的基础上，相当于在动力学方程中考虑非稳态弹流油膜的&刚度&、&阻尼&和固体接触&刚度&的耦合作用，建立并求解了考虑弹流润滑行为动力学效应的配气机构的动力学方程，从而深入地研究了弹流润滑行为与动力学行为耦合作用下的配气机构动力学特征以及凸轮挺杆弹流润滑问题；作为前面工作的对应部分，考虑弹流油膜动力学效应的研究工作也同样分为全膜状态和部分膜状态进行。

With the map for example, we can obtained following conclusions: the cam turning speed has the most direct influence to the dynamics of valve rain; the cam profilers has also a very important influence, the cam profiler as the kind of compound pendulum dose not suit to high speed engine's valve train and the polydyne cam's characteristics is very different from compound pendulum cam's.

论文还首次利用多质量模型的特点对气门落座速度、气门落座冲击力及落座反跳等气门落座特性参数随凸轮轴转速和结构参数的变化规律进行了研究，考察了不同凸轮型线对上述特性参数的影响。对气门落座特性参数进行这样详细和全面的研究，是本论文的开创性工作之一，在其他的文献中尚未见相同报导。

Based on the kinematic and geometric relationships between the cam and its roller-follower turret, the eOEects on the output of the cam mechanism owing to clearances in the grooved cam and in the roller bearing, preload between the cam and its turret wheel and the cam taper angle have been investigated.

基于运动学和几何关系与凸轮及滚子的跟随者炮塔， eoeects对输出的凸轮机构由于以清拆行动，在沟槽式凸轮，并在滚子轴承，预紧力之间的凸轮和其炮塔车轮及凸轮锥度进行了调查。

In a disk device, a base body (10) has a drawing lever (80) for inserting a disk, a discharge lever (100) for discharging the disk, and a slider mechanism for pivoting the drawing lever (80) and the discharge lever (100). The slider mechanism has a first cam groove for sliding a first pin of the drawing lever (80) and a second cam groove for sliding a second pin of the discharge lever (100). The drawing lever (80) pivots when the first pin slides in the first cam groove as the slider mechanism operates, and the discharge lever (100) pivots when the second pin slides in the second cam groove as the slider mechanism operates.

该光盘装置，在基座本体(10)上设置插入光盘的引入杆(80)、排出光盘的排出杆(100)以及使引入杆(80)和排出杆(100)转动的滑动机构；在滑动机构上具有使引入杆(80)的第一销滑动的第一凸轮槽和使排出杆(100)的第二销滑动的第二凸轮槽；通过第一销随着滑动机构的动作在第一凸轮槽内滑动，引入杆(80)进行转动，通过第二销随着滑动机构的动作在第二凸轮槽内滑动，排出杆(100)进行转动。

This paper expounds the approach to simulation of the roller gear indexing cam based flexible cam axes,and studies the method of forcing between flexible cam axes and rigid graduator to set up the model for simulation of the roller gear indexing cam based rigid-flexible coupling .

阐述了在考虑凸轮轴柔性条件下实现弧面分度凸轮机构运动仿真的途径和步骤，结合有限元技术和虚拟样机技术，研究了如何在柔性体凸轮轴与刚体分度盘之间施加作用力的思想和具体实现方法，为该机构的刚柔耦合运动仿真提供了基础模型

Reducing gear drives cam rotate to top half-turn and link gear of upper gate move, top disc opens and discharges. Spring device makes disc close and replace with displacement of cam. When cam rotates to bottom half-turn link, gear of sub-layer gate moves, below disc opens and discharges. The disc closes little by little with the displacement of cam. These two actions maintain a closed state of either disc on the pipe. So it can discharges and lock air at the same time.?

减速装置带动凸轮旋转至上半圈时，上层阀门的连杆机构互动，阀板逐渐打开卸灰，随着凸轮的旋转，弹簧机构使阀板逐渐关闭复位；凸轮旋转至下半圈时，下层阀门的连杆机构互动，阀板逐渐打开卸灰，随着凸轮的旋转又使阀板逐渐关闭，这样两个动作使管道上阀板始终有一个是关闭状态，因而，可使卸灰与锁气同时达到目的。

This paper summarizes the domestic and overseas study status and developing direction of cam. On basis of the problem that the idler wheel which is the driven part of the cam machine in CT36-110 spring operating mechanism is destroyed easily, the author get much fact material through inner research, and presents a optimal design imagine of disc cam. Through enough compare and argumentation, this paper presents the optimal design model of the disc cam.

本论文阐述了目前国内外对凸轮的研究状况、发展动态和发展方向，根据云南开关厂CT36-110型弹簧操动机构中盘形凸轮机构的从动件——滚轮易损坏的生产实际，深入调查研究，在掌握大量生产应用实际资料的基础上，提出了对盘彤凸轮进行优化设计的思想，并在充分比较和论证的基础上提出了盘形凸轮的优化数学模型。

In the belt grinding for cam a method of by adding medial mechanism to avoid direct contacting of conjugate cam and sand belt so as to prolong conjugate cam's life is put forward in this paper which can solve the problem that conjugate cam is easy to wear.

根据凸轮砂带磨削技术中共轭轮易磨损的情况，提出了一种增加中间摆动机构，避免共轭轮与砂带直接接触，从而增加共轭轮工作寿命的方法，并给出了该机构共轭轮廓形计算的方法。

During the titration of Ca〓CaM by La〓, the hydrid complex La〓Ca〓CaM forms as the intermediate species. La〓 can bind to calmodulin with high affinity (K〓=10nmol/L) and obvious cooperation between the two global domains. The secondary structure of La〓CaM and Ca〓CaM are highly similar, but there are obvious differences in ternary structures. Excessive La〓 changes the conformation of calmodulin greatly.

实验结果表明，La〓在钙调蛋白上的结合位点与钙离子相同；在结合顺序上La〓以较小的优势先结合在钙调蛋白的N末端；La〓Ca〓CaM是La〓与含钙的钙调蛋白作用时的主要产物；La〓强烈地与钙调蛋白结合，其解离常数约10nmol/L，各个结合位点之间存在明显的协同效应；La〓CaM与Ca〓CaM在二级结构上高度相似，但是在高级结构上有明显差异。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？