查询词典 piston

When the speed of piton changes from several positive meters per second to negative during short time , a huge transient impacting force acts on the piston. The force spreads in the piston with stress wave. Converging force will become at some sections, which can destroy the piston.

从风动冲击器的工作原理可以得知，风动冲击器的活塞在高压气流的推动下，反复冲击钻头，冲击时活塞的速度由向下的几米每秒在极短时间内反弹为向上的速度，因而对活塞产生一个极大的瞬时冲击力，该力以应力波的形式在活塞内传播，就会在活塞的某些断面产生应力集中，造成活塞的破坏。

The dual-piston valve comprises a valve housing having a pair of piston operation spaces defined therein and a pair of pistons disposed in the piston operation spaces of the valve housing such that the pistons can be vertically moved to open or close inner and outer outlet ports formed at a cylinder.

该双活塞阀包括：阀壳，其中限定有一对活塞运行空间；以及一对活塞，其设置在阀壳的活塞运行空间中，以使活塞能垂直移动以打开或关闭在气缸处形成的内出口和外出口。

Load increased on piston,unreasonable design of piston pin boss,unevenly distributed positive stress on pin hole,stress on inside upper area of pin hole much higher than that on outside,the quality problem in machining and assembly are main reasons of fracture of steel-topped aluminium-skirted piston skirt .

活塞承受的负荷不断提升，活塞销座设计不合理，销孔正应力分布不均匀，销孔内侧上方区域应力远高于外侧应力以及加工和装配中存在的质量问题是柴油机钢顶铝裙组合活塞裙部裂损的主要原因。

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。

As a company assembling best quality of cylinder liner, piston, piston ring and piston pin, Zhengda Industrial believes that best quality products are derived from modernized management. We adopted ISO 9001,2000 quality management system to direct our producing so that we could minimize the difference and waste in assembling.

作为一个选装最优品质四配套产品的企业，中桓经贸确信优质的产品来自于现代化的管理，为此我们采用ISO9001：2000质量管理体系指导生产，使我们尽可能的减少选装过程中的变差和浪费，并使最终客户获得最大利益。

As a company assembling best quality of cylinder liner, piston, piston ring and piston pin, Zhengda Industrial believes that best quality products are derived from modernized management. We adopted ISO 9001,2000 quality management system to direct our producing so that we could minimize the difference and waste in assembling.

作为一个选装最优品质四配套产品的企业，正大实业确信优质的产品来自于现代化的管理，为此我们采用ISO9001：2000质量管理体系指导生产，使我们尽可能的减少选装过程中的变差和浪费，并使最终客户获得最大利益。

It is specialized in manufacturing piston ring ,piston ,piston pin and cylinder liner of engines used for minicar ,car ,motorcycle and vehicle of light, medium and heavy duty .

公司为轿车、微型车、摩托车和轻、中、重型卡车等各类发动机活塞环、活塞、活塞销、缸套四大类产品的专业制造企业，产品种类、规格达1000多种，年产值2.5亿元。

This company is specialized in the production of ANKANG piston ring,piston,piston pin and bush series used for various imported and homemade benzene engine ,farm truck ,motorcycle , air compressor ,ship and internal-combustion engine of engineering machinery.

公司十年来一直以出口为主，现有员工300余人，技术人员20余人，专业生产&安康&牌各种进口，国产汽油机车、农用车、摩托车、空压机、船用及工程机械内燃机的活塞环、活塞、活塞销、轴瓦等系列产品。

Our products have the specialty of strong driving, low noise, high performance, energy-saving and environment-protecting! We guarantee 100000 kilometers 0-risk running. Our products are the most ideal accessory products of FAW Dalian Diesel and Wuxi Diesel. We have taken 40% of the cylinder liner, piston, piston ring and piston pin market. Our company was authorized as premier agent of FAW Dalian Diesel, which makes our service better and wider.

产品主要特点动力强劲、低噪音、高效节能、绿色环保、保用十万公里等特点确保用户十万公里零风险使用，是一汽大柴、锡柴机售后维修时最理想的配套产品，国内四配套行业市场占有率已达到40%，2001年公司被一汽大连柴油机厂授予一级代理商，使我们更好的、更大范围的为广大用户服务。

The practical application of HVD in Liaohe Oilfield shows that castiron piston rings wear rapidly if they are designed according to JB/T 8547－97, and the piston rings made of PTFE have long working life. Leakage is permitted to some extent in rotating seal in HVD, consequently, O rings can work for about 1 month instead of piston rings and can be used when urgent.

通过在辽河油田注水泵的现场运行表明，根据JB/T 8547－97设计的铸铁涨圈磨损快，而采用填充聚四氟乙烯材料的涨圈寿命长；根据HVD旋转密封允许一定泄漏的特点，采用O形圈代替涨圈也可获得约1个月的使用寿命，可作短期应急使用。

But it is not a responsibility that fazes him one ounce.

但是这种责任并不会让他感到不安。

We should try to curtail our spending.

我们应该缩减开支。