活塞顶

电子束焊活塞顶圈毛坯质量的超声波检测

Ultrasonic inspection of quality of pre-machined crown ring for electron-beam welding piston

陶瓷材料特性的参数研究及活塞顶材料的优选

Parameter Study for Properties of Ceramic Material and Optimization for Material of Piston Crown

利用MSC有限元软件进行了温度场、机械应力场、热应力场、耦合应力场及活塞顶与活塞裙接触计算分析研究。

Define the temperature , force and contact boundary conditions of the 3-D model . The temperature field , structural stress field , thermal stress field , thermal & mechanical stress field and contact analysis were calculated by MSC software .

介绍了GE公司新式活塞顶的改进方式，分析了活塞顶存在问题的原因，结合ND5型机车的实际情况，对新式活塞顶进行了国产化开发。

The improvement method of new GE piston crowns is presented . The reasons of problems of piston crowns are analyzed . Based on the actual situations of ND 5 locomotives , the domestication development of new piston crowns is conducted .

发动机活塞顶面与缸盖间隙的控制

Controlling the Clearance Between Engine Piston Top and Cylinder Head

柴油机活塞顶面油膜分布规律的研究

A Study of Fuel Film Distribution on the Piston Top of Diesel Engine

活塞顶上油膜蒸发规律的数学研究

The Numerical Study of the Law of the Evaporation of Fuel Film on Pistons

陶瓷活塞顶断裂概率的预测

Failure Probability Prediction for a Ceramic Piston Head

应用边界元法分析柴油机活塞顶的温度场

Analysis of Diesel Engine Piston Head Temperature Field by Means of Boundary Element Method

沙漠车用陶瓷活塞顶的研制

Ceramic Piston Crown for Truck Run in Desert

气压烧结氮化硅陶瓷活塞顶

Silicon Nitride Ceramic Piston Crown by GPS

车用柴油机活塞顶导向槽的挤压涡流效应

The effect of squish swirl on conduct channel of piston crown for automotive diesel engine

大型柴油机活塞顶环槽激光淬火层的耐磨性研究

Research on Wear Resistance of the Laser Quenched Groove of the Piston Head in Large Diesel Engine

40/45柴油机活塞顶环槽的激光淬火研究

Study on Laser Quenching on the Piston Top Ring Groove of 40 / 45 Type Diesel Engine

内燃机活塞顶面激光重熔陶瓷层及其隔热效果

Ceramic Coating Remelted with Laser on the Piston Top of Internal Combustion Engines and Its Heat Insulating Effect

其中结构参数包括楔形燃烧室角度、活塞顶形状和火花塞位置，运行参数包括点火时刻、混合气浓度和残余废气量。

The structure parameters include wedge-shaped combustion chamber angle , piston top shape and the locations of dual-spark .

本文应用有限元法和光弹性试验对活塞顶的裂纹进行断裂力学分析。

This paper studies the fracture mechanics of piston crown crack by means of finite element method and photoelastic method .

富油区大直径油滴的燃烧裂解和活塞顶隙处外溢燃气的低温燃烧是柴油机产生碳烟微粒排放的主要原因。

The cracking of big diameter fuel droplet and the combustion of the overflowing gas from the combustion chamber at low temperature in the piston crown clearance are the main reasons of soot emission from diesel engine .

根据企业对活塞顶面硬质阳极氧化膜膜层性能的要求，实验室自行设计了一套在大脉冲电流下进行硬质阳极氧化处理的装置。

According to the enterprise 's request for the property of the hard anodizing film on the top surface of piston , a set of equipment for hard anodizing at high pulse current was auto-designed by the laboratory .

对带有二次喷射导向壁面的小口径比和小径深比的ω型燃烧室，充分利用活塞顶面以上氧气的问题仍有待解决。

The ω - combustion chamber with small caliber ratio , small surface-volume ratio and leading wall of secondary spray is not very well to make use of oxygen above piston surface and in the upper portion of combustion chamber .

缸盖底面和活塞顶面对流换热系数时均值云图分布规律基本相同，中心区域和边缘区域对流换热系数较低，中间环形区域形成高值区。

The distribution of time averaged HTC at the bottom of the cylinder head is basically the same as what at the top surface of the piston , lower at the central region and the edge region , higher at the intermediate annular region .

根据传热学原理，利用偏微分方程和断裂力学等方面的知识，计算了活塞顶面的交变温度场、交变热应力及其穿透深度。

Based on the theory of thermal conductivity , the alternate fields of temperature and thermal stress , and the penetrating depth on the top surface of a piston are calculated , by the thinking of partial differential equation , fracture mechanics and other knowledge .

为了更好地弄清起动和怠速时发动机缸内未燃碳氢生成过程以及顶岸间隙和油膜对缸内未燃碳氢的影响，测量了起动和怠速过程活塞顶岸壁面和缸套壁面温度。

In order to understand better the process of hydrocarbon formation and the effect of the top land crevice and the oil layer of the cylinder liner on unburned hydrocarbons during cold start and idling period , the temperature of piston top land and liner has been measured .

该工艺提高了硬质阳极氧化膜得生成速度，成膜速率为15μm/min，电流密度高达7A/dm2，已用于铝活塞顶面阳极氧化，可使生产效率提高2～3倍。

The process was improved in film forming speed of hard anodizing with ( 1.5 μ m / min ) and usable current density up to 7 A / dm ~ 2 . The productivity of anodizing top face of aluminium piston is raised by 2 ~ 3 times .

240组合活塞钢顶氮化及工艺优化

Ion Nitridation and Technology Optimization for 240 Two - pieces Piston Top

机车柴油机活塞环顶环结构特点及其优化

The structure characteristic & optimization of locomotive diesel engine piston top ring s

例如，组合活塞中活塞顶与活塞裙之间的不同配合方式将严重地影响活塞的应力分布。

For example , the stress distribution over a composite piston depends very much on the way the crown and skirt are built up together .

活塞的顶部是活塞头或者活塞顶。

The top part of the piston is the head , or crown .

本文以机车柴油机钢顶铝裙组合活塞为对象，建立组合活塞钢顶铝裙连接螺栓-活塞销的四体接触计算模型。

This paper introduced a four-body contact model of steel crown-the nodular cast-iron skirt-piston pin-connecting bolt for the steel-crown aluminum-skirt composite piston of locomotive diesel engines .

文中以一陶瓷柴油机发动机活塞为例，介绍了该模型用于预测活塞顶温度波动现象的结果，并讨论了发动机转速和陶瓷镀层对温度波动现象的影响。

With the piston of a ceramic engine as an example , the results of the temperature fluctuation predicted by the model proposed are presented , and the effect of engine speed and ceramic coating on the temperature fluctuation are also discussed .