TJ12／50A（B）型轮式通井机的研制与应用

从技术的先进性和经济的可行性出发,研制的TJ12/50A(B)型轮式通井机采用整体式专用底盘,辅以工程机械用转向桥和大轮胎,使整机具有良好的运移性和越野性;自携作业井架,减少了修井作业中的辅助配套设备,降低了劳动强度;采用柔性传动部件—液力变矩器和液力换档变速箱,使传动系统的可靠性大为提高。     

SQ—1200型顺槽连续牵引车在超化煤矿的研究与应用

通过SQ— 12 0 0型顺槽连续牵引车的应用 ,结合现场实际 ,论述了其合理性。又剖析了在使用过程中出现的问题 ,对产品的使用和升级改造提出一些经验和建议 ,供使用和设计时参考     

拖拉机油概述

介绍了国内外拖拉机油的发展状况。随着拖拉机的发展，国外拖拉机油从单用途油发展到超级通用油。国内目前的拖拉机油大多为液压传动油，与国外先进水平相比，国内拖拉机油存在着较大的差距。     

拖拉器在水平井生产测井中的应用

文章介绍了水平井拖拉器的基本结构及性能指标；总结了使用拖拉器进行水平井生产测井的测并工艺：介绍了在塔里木油田水平井生产测井的实际应用情况，给出了测井解释结果。     

半挂牵引车车架的强度特性分析

根据某型半挂牵引车车架的结构特点和使用工况,详细讨论了半挂牵引车车架不同结构有限元组件的连接和边界条件的设定,建立了半挂牵引车车架系统的有限元模型,计算了四种载荷工况时的车架应力并进行了车架的固有模态特性分析。发现该车架具有较好的静态强度和动态特性：弯扭工况时车架纵梁后部出现最大应力,但也能满足强度要求;车架的固有频率避开了悬架振动频率和发动机激励频率;但前后钢板弹簧支架处于两种振型的拐点,会出现较大应力。     

自行轮式通井机液压系统设计

为了满足油田不断增加的修井作业量，近年来自行轮式通井机的开发与研制受到油田的普遍关注，作为其关键部分的液压系统的设计对通井机的工作性能有较大的影响。本文对通井机的液压系统进行了设计，详细介绍了其工作原理，分析了所设计液压系统的特点。     

On Dual-Mode Driving Control Method for a Novel Unmanned Tractor With High Safety and Reliability

Due to the non-standardization and complexity of the farmland environment, it is always a huge challenge for tractors to achieve fully autonomy (work at Self-driving mode) all the time in agricultural industry. Whereas, when tractors work in the Tele-driving (or Remote driving) mode, the operators are prone to fatigue because they need to concentrate for long periods of time. In response to these, a dual-mode control strategy was proposed to integrate the advantages of both approaches, i.e., by combing Self-driving at most of the time with Tele-driving under special (complex and hazardous) conditions through switching control method. First, the state switcher was proposed, which is used for smooth switching the driving modes according to different working states of a tractor. Then, the state switching control law and the corresponding subsystem tracking controllers were designed. Finally, the effectiveness and superiority of the dual-mode control method were evaluated via actual experimental testing of a tractor whose results show that the proposed control method can switch smoothly, stably, and efficiently between the two driving modes automatically. The average control accuracy has been improved by 20% and 15% respectively, compared to the conventional Tele-driving control and Self-driving control with low-precision navigation. In conclusion, the proposed dual-mode control method can not only satisfy the operation in the complex and changeable farmland environment, but also free drivers from high-intensity and fatiguing work. This provides a perfect application solution and theoretical support for the intelligentization of unmanned farm agricultural machinery with high safety and reliability.      

液压系统在石油钻机上应用的研究进展

随着石油钻采的不断发展,钻井施工难度日益加大,很难满足井下石油钻采作业强度和效率的需要。在对国内外石油装备资料进行广泛调研的基础上,详细介绍了石油钻机关键设备中钻孔器、防喷器、泄油器和油管牵引器的液压系统。为推动国产石油钻采系统关键设备技术水平的提高,在分析井下石油钻采关键设备中液压系统的主要特征并对其组成和功能进行评述的基础上,对国内外液压系统在石油钻机上的应用现状进行综述。结合国内外研究进展,提出了井下石油钻采关键设备中液压系统向高可靠性、高劳动强度、高工作效率和低故障率方向发展的建议。     

用盘锦基础油调试农用小型拖拉机油的可行性探讨

通过对盘锦基础油进行了数据分析,用盘锦基础油调试了不同粘度级别的农用小型拖拉机油,进行模拟性能分析,并与大庆润滑油一厂生产的农用小型拖拉机油的分析数据进行对比.结果表明:盘锦基础油不适用于生产农用小型拖拉机油.     

虚拟设计与制造在SQ-1200型无极绳连续牵引车上的应用

随着科学发展和信息技术的应用,虚拟设计与制造技术已开始用于企业的生产和制造中。结合SQ-1200型无极绳连续牵引车,论述虚拟设计与制造技术的应用及其优点。