共查询到20条相似文献,搜索用时 62 毫秒
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装甲车辆液压助力操作系统如果使用维护不当,其故障率会大大提高,严重影响车辆操纵的可靠性和使用寿命.直接影响战斗性能的发挥;从使用与维护的角度出发,在油品使用、系统清洁、防止渗漏和防止油温过高等方面提出了一些预防措施. 相似文献
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我发运站调运的车皮主要是运送煤炭,使用的调度绞车为无极绳调度绞车,配用直径为245mm的6×19钢丝绳,为右交互捻,强度1815N/mm2,总合破断拉力429kN,总长度780m。牵引车皮时,通过绳卡一端的挂车绳头钩在车皮上,绳卡另一端用自锁拉环锁住绞车钢丝绳。该套设备置于铁路专用线和国家铁路线中间,露天作业。钢丝绳经常承受日晒雨淋、煤粉腐蚀和意外损伤等,多年实践经验证明,在这样恶劣环境下,要确保车皮准点安全发运,绞车钢丝绳的正确使用和维护保养是不容忽视的。1 操作时注意事项(1)调度绞车司机要严格按操作规程作业,注意操作平稳,避… 相似文献
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冻干机的选型、使用以及维护保养 总被引:2,自引:0,他引:2
从使用冻干机的生产企业考虑,对冻干机的选型、使用、维护、保养方面的心得作了介绍,供制药企业在冻干机的选型、运行使用和维护保养方面参考。 相似文献
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笔者通过对柴油机检修、组装、试验过程中的清洁度分析,得出预防柴油机碾瓦事故的有效措施是提高柴油机在检修过程中的清洁度,这是确保柴油机检修质量必须加以控制的项目。 相似文献
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Yinnan Yuan Deqing Mei Zhong Wang Tian Zhang 《Frontiers of Mechanical Engineering in China》2008,3(2):189-192
The combustion and heat release of engines using diesel fuel and bio-diesel fuel have been investigated. The results illustrate
that the combustion happens in advance and the ignition delay period is shortened. The initial heat release peak declines
a little, the corresponding crankshaft angle changes in advance, and the combustion duration is prolonged. The economic performance
and emission features of diesel engines using diesel fuel and bio-diesel fuel are compared. The results also show that the
specific fuel consumption of bio-diesel increases by about 12%. The emissions, such as CO, HC, and particulate matter decrease
remarkably whereas NO
x
increases a little.
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Translated from Journal of Jiangsu University (Natural Science Edition), 2006, 27(3): 216–219 [译自: 江苏大学学报(自然科学版)] 相似文献
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Increasingly stringent emission legislation, together with the requirements for improved diesel engine performance, such as fuel economy, friction reduction, and extended drain intervals, have led to attention being focused on engine oil quality. The use of low‐friction engine oils can improve engine fuel efficiency and lead to a significant reduction of gaseous emissions. Therefore, engine oil is of importance when considering engine design parameters. This paper describes a study of the contribution of engine oil to diesel exhaust emissions. The investigations have shown that diesel engine particulate emissions as well as hydrocarbons and NOX emissions depend on the lubricant oil properties, in particular on the sulphur content, volatility, and metal content. 相似文献
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T.‐C. Jao S. Li Kenji Yatsunami Shiahn J. Chen Aladar A. Csontos James M. Howe 《Lubrication Science》2004,16(2):111-126
The hardness of various types of soot produced by heavy‐ and light‐duty diesel engines of European, Japanese, and North American designs was measured by low‐loss electron energy‐loss spectroscopy (EELS). No clear general trend can be established that shows heavy‐duty diesel engine soot is necessarily harder than light‐duty diesel engine soot. The variation in hardness among individual soot particles produced by the same diesel engine can be as large as differences between the hardest soot particles produced by heavy‐duty diesel engines and the softest soot particles produced by light‐duty diesel engines. There are heavy‐duty diesel engines that can produce soot that is softer than that produced by some light‐duty diesel engines and vice versa. Nevertheless, the hardness of all types of soot studied is close to the range of hardness of metal engine parts. Thus, the results indicate that soot is hard enough to abrade some metal engine parts. 相似文献
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针对柴油机轴瓦磨损问题,为了研究滑动轴承磨损影响机理且由于现有设备无法满足试验要求,开发研制了一套滑动轴承磨损试验系统。利用该系统可进行主轴瓦和连杆瓦两种滑动轴承在结构、转速、载荷、磨粒、润滑油状态不同条件下磨损状态的模拟试验研究。在完成试验方法研究的基础上,着重介绍了该试验系统的液压模块、机械承载模块、润滑模块、试验控制模块等子系统的开发设计。该系统采用液压伺服的加载方式对模拟轴进行了拉压加载,采用变频器控制驱动电机转速,润滑油的压力及温度可以自由调节,并利用基于美国NI公司的LabVIEW环境的软件实现了对试验系统的自动控制以及试验数据实时显示和存储,实现了不同工况下的轴瓦磨损的模拟试验。研究结果表明,该试验系统可以实现试验功能,具有良好的试验性能,达到了试验系统开发的预期目标。 相似文献
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Y. Yahagi 《Tribology International》1987,20(6):365-373
Deleterious wear of the cylinder bore in diesel engines can be aggravated by alteration of combustion conditions, such as that brought about by use of Exhaust Gas Recirculation (EGR) equipment and consequent high mileage. This paper describes the influence of combustion products — i.e. sulphuric acid and carbon soot, which can be primarily concerned in corrosive wear — on lubrication under reciprocating sliding of a piston ring and on the bore wear. 相似文献
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以“飞车”与“游车”的形成机理为切入点,着重分析了柴油机“飞车”及“游车”的故障症状、原因,提出了对疑难故障的诊断检修方法。 相似文献
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