活塞

At this time, the caulking portions (26) are formed at upper and lower ends of an interference preventive portion (24) defined within the connecting chamber (22) and cause the upper and lower ends of the piston pin (30) to be fastened to the piston (20) within the connecting chamber (22) of the piston.

这时，箍紧部分(26)形成在连接室(22)中干涉预防部分(24)的上端和下端，并使得活塞销(30)的上端和下端在活塞连接室(22)中被固定到活塞(20)。

A single power piston is arranged coaxially with a displacer piston and both pistons move within this cylinder.

一个单电源活塞同轴排列与位移活塞和活塞都内移动此缸。

Based on the comprehension of the researches of CO2 expressor, rolling piston expresser has been designed independently with the roilling pistons of expansion chamber and compression chamber integrated with the same shaft. Design parameters have also been calculated concretely

综述了国内外CO2膨胀压缩机的研究现状，分析了现有膨胀压缩机的技术特点，独立设计了膨胀腔活塞与压缩腔活塞同轴联接的滚动活塞式膨胀压缩机，同时，还进行了具体的参数计算。

After the piston reaches BDC, or the lower limit of its travel, it begins to move upward.

在活塞到达下止点时，或者是活塞下限时，活塞开始向上运动。

When the balance of the piston, the pressure difference between the two parts form a cavity upward oil pressure and spring pressure, friction, balance piston weight in balance, the balance of the piston to maintain a certain distance from opening up.

当平衡活塞上、下两腔压力差形成向上的油液压力和弹簧压力、摩擦力、平衡活塞自重处于平衡状态时，平衡活塞上升距离保持一定开度。

The piston is attached to the top of a connecting rod by a pin,called a piston pin or wrist pin.the bottom of the connecting rod is attached to the crankshaft.the connecting rod transmits the up-and-down motion of the piston to the crankshaft,which changes it into rotary motion.the connecting rod is mounted on the crankshaft with large bearings called rod bearings.

这个活塞被一个叫活塞销或轴颈销的销子连接在连杆的上部。连杆的底部被连接在曲轴上。连杆把活塞的上下运动传递给曲轴转变成旋转运动。连杆通过一个大的叫做杆轴承的轴承（其实就是滑动轴承，分成两个半圆轴瓦）安装在曲轴上。

When the flow rate through the Poppet head reaches a certain size, balance piston upper and lower chamber of the two oil pressure difference will create upward hydraulic pressure exceeds the spring preload and balanced piston friction and balance the sum of the piston weight and other forces, balance piston upward, so that the pressure port and overflow port interlinked, a large number of pressure from the oil will flow back into the fuel tank from the overflow port.

当通过提动头的流量达到一定大小时，平衡活塞上、下两腔的油压力差将形成向上的液压力超过弹簧的预紧力和平衡活塞的摩擦阻力及平衡活塞自重等力的总和，平衡活塞上移，使压力口和溢流口相通，大量压力油便由溢流口流回油箱。

A detailed three-dimensional solid model of the piston is established by means of Ansys 11.0 Workbench Environment, which is issued in March 2007. Using the third thermal boundary conditions, analysis of the three-dimensional piston, including temperature, displacement and thermal stress field are performed by means of thermal-structural coupling. Structural optimization is also accomplished and a new piston has been designed, which performance is getting improved.

本文在2007年3月发布的Ansys 11.0协同仿真环境中建立了详细的活塞三维实体模型，运用第三类热边界条件，结合热耦合分析方法完成了活塞的三维温度场，位移场及热应力场的仿真，在此基础上对活塞的结构优化进行了探索，并设计出一款性能得以改善的活塞，实现了真正意义上的仿真驱动产品设计。

The gap between piston and cylinder wall of an internal combustion engine is small, however it may induce the piston secondary motion periodically and generate unwanted sound and vibration.

由于活塞缸套之间存在间隙，活塞在缸套内会产生横向及绕活塞销旋转运动，称之为活塞二阶运动。

The project for passenger cars with engine piston aluminum alloy, alloy components through optimal design, rare earth - Modification of phosphorus salt air and bottom melting slabs, metal-cast aluminum piston at the end of riser feeding process, heat treatment process parameters of choice , Nano-Detroit surface coating materials, such as key technology research and development with a density of small, light weight, thermal conductivity, and coefficient of thermal expansion of small, high temperature and have sufficient strength, wear and corrosion resistance , Aluminum piston size and good stability, its integrated technical indicators have reached the leading domestic level.

项目介绍（简介、技术特点、应用范围、市场前景、效益分析及对投资者要求。500字以内）本项目针对乘用车发动机用铝合金活塞，通过合金成分优化设计、稀土－磷盐复合变质处理与炉底透气砖熔炼技术、铝活塞金属型铸造底冒口补缩工艺、热处理工艺参数的选择、纳米级活塞表面涂层材料等关键技术的研究，开发出具有密度小、质量轻、热传导性好、热膨胀系数小，并具有足够的高温强度、耐磨和耐蚀性能、尺寸稳定性好的铝合金活塞，其综合技术指标达到国内领先水平。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。