小型高速直喷式柴油机的“快速溢流”喷油系统

小型高速直喷式柴油机的性能在很大程度上取决于喷油系统的平均喷油压力。本文介绍一种新型“快速溢流”式喷油系统,它借助喷油器体内的压力增强机构可以大幅度地提高平均喷油压力,同时通过喷油器的溢流作用使喷油过程快速终止,从而在油泵油咀不变的条件下缩短喷油持续期达30％。文中结合现代柴油机要求的喷油特性阐述了这一系统的构思过程和试验结果。     

10Д,100M型柴油机经济性的提高

为了解决10Д100M型柴油机燃油燃烧过程恶化、部分工况下烟度加大以及排气口烧损现象，试验了具有新断面燃油泵驱动凸轮的燃油设备，并进行了12个月的运行比较试验。试验结果表明：试验型内燃机车的单位运量的燃油消耗量比批量生产型内燃机车低2．9％。     

柴油机活塞材料的选择理念

Federal Mogul公司针对升功率93kW的3．0L高增压柴油机用新型铝活塞的研究表明,铝活塞具有广阔的前景,不过,最高燃烧压力超过22MPa及升功率大于100kW的轿车柴油机必须使用钢活塞,在极其苛刻的条件下,钢活塞的热管理得到高度的关注。介绍了开发铝活塞和钢活塞的不同理念。     

集束塔式立管总体强度分析(英文)

Bundled hybrid offset riser (BHOR) global strength analysis, which is more complex than single line offset riser global strength analysis, was carried out in this paper. At first, the equivalent theory is used to deal with BHOR, and then its global strength in manifold cases was analyzed, along with the use of a three-dimensional nonlinear time domain finite element program. So the max bending stress, max circumferential stress, and max axial stress in the BHOR bundle main section (BMS) were obtained, and the values of these three stresses in each riser were obtained through the "stress distribution method". Finally, the Max Von Mises stress in each riser was given and a check was made whether or not they met the demand. This paper provides a reference for strength analysis of the bundled hybrid offset riser and some other bundled pipelines.     

ЧМЭ3型内燃机车用新型柴油机—发电机组

原苏联铁路约有６０００台ЧМЭ３型内燃机车，这些机车中已有几百台柴油机－发电机组的使用寿命已经到限，必须更换。为了节约外汇，拟用国产的１－ПД４型柴油机或Д４９型柴油机来取代ЧМЭ３型内燃机车上的Ｋ６Ｓ３１０ＤＲ型柴油机。经计算、研究和分析后证明：装用１－ПД４型柴油机比装用Д４９型柴油机更为合适。这样的改造不仅在技术上可行，在经济上也合适。装有１－ПДГ４型柴油机－发电机组的改造机车已通过部级鉴     

为Metra“增加活力”

Wabtec公司为芝加哥Metra市郊铁路运输系统提供的MP36PH-3S机车是Metra现有车队的美学和技术发展的新起点。     

LNG船的燃气和蒸汽轮机推进器(英文)

Propulsion of liquefied natural gas (LNG) ships is undergoing significant change. The traditional steam plant is losing favor because of its low cycle efficiency. Medium-speed diesel-electric and slow-speed diesel-mechanical drive ships are in service, and more are being built. Another attractive alternative is combined gas and steam turbine (COGAS) drive. This approach offers significant advantages over steam and diesel propulsion. This paper presents the case for the COGAS cycle.     

Sensing of chlorpheniramine in pharmaceutical applications by sequential injector coupled with potentiometer

This paper reports on development of a system consisting of a portable sequential injector coupled with potentiometric unit for sensing of chlorpheniramine （CPA）, based on the reaction of CPA with pota...