工作分析

This paper applies approximate equation to describe the characteristic curve of an axial flow fan, for the purpose of determining its working system,and is intended to apply the equation method for enlarging the extent of the analy-tical method, commonly used for determining the working system of axial flow fan and the ventilating syetem of a mine.

本文应用近似方程来描叙轴流式扇风机的特性曲线，其目的要确定矿井轴流式扇风机的工作制度，并且企图使扇风机工作制度与矿井通风制度上应用方程法来扩大分析法的范围。

The results show that the flow area and the high speed of the solenoid valve are the key factors in all of the factors, in order to improve the performance of the system, a high speed and great flow area solenoid valve must be used.

对所得到的优化结果分析说明，控制电磁阀的通流面积和响应速度是影响系统工作性能的最为关键的参数，要提高系统的工作性能必须要选用高速大流量电磁阀。

The research interest in this thesis is focused on the hydraulic actuator development of dual clutch transmission for passenger cars. Firstly, the principle, structure, characteristics and prospects of DCT are introduced. Analyses and compares the structure, functions and characteristics of the different types of clutch control system.

本课题的研究工作以DCT自动变速器双离合器液压执行机构为研究对象，主要进行了以下几个方面的研究：首先，介绍了双离合器自动变速器的原理、结构、工作特点及其应用前景；对不同类型离合器执行机构的组成、功能及特点进行了分析比较；介绍了液压传动和控制相关知识。

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。

Furthermore the starting control with three-wire method is introduced as well as related working principle, connection method and advantages of this starting way.

介绍了常见变频器起动回路的工作原理，并针对跳闸频繁这一现象分析了其原因，阐述了变频器三线起动控制的工作原理与接线方法，阐明了三线起动控制的优点。

The series resonance type fault current limiter has the advantage of simple operating principle and topological structure etc. It may be designed with serial compensation following the condition of the electrical network. However, from the simulation, we draw the conclucion: in the process of restraining fault current after a fault occurrence in electrical network, capacitor and parallel inverter switch will stand for poor working condition.

串联谐振式限流器具有工作原理、拓扑结构简单等优点，并且可以根据需要设计成带串补型，但通过仿真分析得出：其在电网发生短路故障进入短路限流工况过程中，其电容器及并联转换开关将工作在相当恶劣的条件下。

In order to study the thermodynamic process of the variable displacement swash plate compressor and analyze the factors affecting the performance of this kind of compressor, the thermodynamic model, the dynamic model and the finite element model of suction and discharge valves are developed.

为了了解变排量斜盘式压缩机的工作机理并分析影响变排量斜盘式压缩机性能的主要因素，本文建立了其热力工作过程的热力学及其动力学模型。

The characteristics of two technologies in vacuum-crystallization-system were discussed during the production process of titanium dioxide with sulphate process.

分析了硫酸法钛白生产过程中真空结晶系统的两种工艺技术路线的特点以及硫酸亚铁结晶过程的行为，认为采用两级蒸汽喷射法，可有效保证喷射器工作在最佳工作区间，并对其操作参数的优化进行探讨。

The PLC control program has been developed. After the test, the redesign has been proved success. The machine function has been increased, it not only satisfies the straightening demands of steering gear axle, but also has good reliability, stability, and good man-machine interface.

为保证设备改造后的校直精度及工作可靠性，对转向器性能进行了试验研究，通过与手动校直的对比分析，全自证明全自动校直机测控系统的改进是成功的，扩大了试验台的使用范围，不仅能够满足用户的转向器轴的校直需求，而且具有较高的可靠性、工作稳定性和良好的人机界面。

This paper is on the basis of principle of trigonal height measurement of total station,combined working practice,and analyzed the influence to trigonal height measurement precision of total station by the law of error propagation,we concluded the factors influence the precison of trigonal height survey of total station,so as to call attention to us in our jobs.

根据全站仪三角高程测量原理，结合工作实践，通过误差传播定律对影响全站仪三角高程测量精度进行分析，找出影响全站仪三角高程测量精度的因素，以便在测量工作中能够提高测量精度。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。