机械工程

This paper we introduce a new hydraulic pump and motor bedstand ,which is mainly used for testing hydraulic pump and motor.

本文介绍了一种新型液压泵、液压马达实验台，主要针对工程机械行业使用的油泵油马达入行试验。

The results showed that the dipped 500dtex nylon 6 bristlelike monofilament net fabric could be used instead of the bead flippers and chafers in 18.4-26 12PR tubeless agricultural tire with R4 block tread patterns,18.00-25 32PR tubeless OTR tire with general block tread patterns and ST205/75D15 6PR tubeless trailer tire to ensure the air tightness of tire,significantly improve the appearance,increase the productivity and decrease the production cost.

结果表明，以500dtex锦纶6浸胶鬃丝网眼布替代胎圈密封胶和胎圈包布应用于18.4-26 12PR块状R4花纹无内胎农业轮胎、18.00-25 32PR通用块状花纹无内胎工程机械轮胎和ST205/75D15 6PR混合花纹无内胎挂车轮胎，在确保轮胎气密性的前提下，可显著改善胎圈外观质量，同时可提高劳动效率，降低生产成本。

At the same time, on the base of analysis of the present situation, the development trend and the leading edge technology, the necessity and feasibility about the exploitation of the full hydraulic bulldozer"s sate monitoring and fault diagnosis system is given; According to the structure, working feature and working environment, it works out system schema and system composition; The system is divided into display module, communication module and fault diagnosis module by means of block design, the implementation method and key parameter are also given; In light of the features of the full hydraulic bulldozer, the state monitoring and fault diagnosis platform composed of controller RC6-9 and display DI2/10 is designed based on CAN-Bus and the hardware design is completed; It lists the measured values and state of monitored parameters which should be real-time displayed in monitoring module as well as the data which will be transmitted; Furthermore, On the base of the study of, it gives 34 kinds of constant faults" diagnosis methods; Using BODAS software and DPS software, it compile the program code of the controller and the displayer; At last, this paper design and make the simulation test device of control system of construction machinery, through the experiment, the realizability, the categoricalness, the reliability, the stability and real-time are tested, in addition, the improved methods are given.

本文收集整理了国内外智能推土机研究的相关文献资料，综合分析了国内外智能推土机的研究现状、发展趋势和前沿技术，论证了开发全液压推土机智能系统的重要组成部分&全液压推土机状态监测与故障诊断系统&的必要性和可行性；根据全液压推土机的结构、作业特点和作业环境，制定了全液压推土机状态监测与故障诊断系统方案，确定了系统的结构组成；采用模块化设计方法，将整个系统分成了显示、通信和故障诊断三个模块，给出了各模块功能的实现方法，确定了各模块的关键技术参数：选用RC6-9和DI2／10作为系统的控制器和显示器，用CAN总线搭建了系统的通信平台，完成了系统的硬件设计；确定了系统监测参数和通信数据，对全液压推土机常见故障特征进行了分析，给出了34种常见故障的诊断方法；在BODAS软件和DPS软件的集成编程环境下，编写了控制器和显示器程序；设计并制作了工程机械控制系统模拟试验板，并在此基础上通过多次的程序调试与试验，对所设计的全液压推土机状态监测与故障诊断系统功能的可实现性、完备性、可靠性、稳定性和实时性进行了检验，证实了此系统的可行性，并提出了进一步的改进方案和措施。

There are disaccordant conclusions of Multi-Point Input Analys

本文的多点输入地震反应的结论可供土石坝抗震设计时参考，提出的新方法以及进一步完善后的原方法可应用到岩土工程相关领域，基于不规则动应力极值的损伤值计算方法有应用到机械等其它领域的前景。

In this case, in order to support the durative development of engineering machinery manufacture, reasonable, adaptive and effective marketing strategy should be established.

这种情况下，工程机械生产企业必须制定合理性、适应性、高效性的市场营销战略和成熟可靠的营销策略，以支持企业的可持续性发展。

The main products of the company includes road bridge engineering equipment such as single-beam crane, double-beam crane, gantry crane, foundery crane, bridge girder erection machine, etc.

公司主要产品有单梁起重机、双梁起重机、门式起重机、铸造起重机、架桥机等路桥工程设备及各种非标起重设备，为冶金、电力、机械、矿山、港门、石化等行业配套服务，产品远销国内外。

Freet has become the key manufacturing base of Sinopec and Shengli Oilfield Petroleum Machinery Equipment and a new force in the International Petroleum Equipment Manufacturing and Engineering Technique Service.

业已成为中石化及胜利油田石油机械设备制造的重点生产基地，并成为国际石油装备制造和工程技术服务的一支生力军。2007年全公司销售收入达15亿元。

There are over 80 first tier dealers in China; its sales network covers all domestics markets; and its products are sold to overseas markets. Over 3000 sets of forklifts are sold in 2005; about 600 sets are sold to major markets in Europe and America, the sales income is nearly 300 million Yuan. The company has become the most growable forklift and construction machinery manufacturer and major base of forklift development and export in China.

公司已经在国内建立了80多家一级代理经销商，营销网络全面覆盖国内市场，产品批量出口国际市场。2005年叉车产品销售3000余台，销售收入近3亿元，出口欧美主流市场600余台，成为国内最具成长优势的叉车及工程机械强式品牌和国内主要的叉车出口及研发基地。

The universality of application of helicoidal surfaces in the engineering, the importance of their performance in the certain field and the non-replaceability of their functions in the specified mechanical systems have resulted in that the technology of measurement for helicoidal surfaces has been a critical research project in the field of dimensional measurements.

螺旋曲面在工程中应用的广泛性、在一定领域中其性能的关键性以及在特定机械系统中其功能的不可替代性，决定了螺旋曲面测量技术历来是几何量计测技术中一项重要研究课题。

This paper analyzes the theory and the characteristic of hydrostatic transmission with secondary regulation, and introduces the configuration and the working principle in the technique.

分析了二次调节静液传动技术的原理和特点，介绍了采用该技术的工程机械多功能试验台的结构和工作原理。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。