寿命

Technical Analysis of Ballastless Track of DB and ProposalsXin Xuezhong Abstract Ballastless track features little maintenance,high reliability,long service life,low cost compared to its service life, low structure height, large transverse track resistance, ballast splashing—proof,and flexible superelevation and gradient.

由于无碴轨道具有维修量小，稳定性好，使用寿命长，全寿命周期费用低，结构高度低，横向轨道阻力大，可避免飞碴，超高、坡度设置灵活等优点，在德国高速铁路建设中受到重视，得到了广泛应用，并形成了Rheda、Zt~BLIN、BERLIN、B6GL等系列产品。

Swing Beam Shear Cut the last knife in the process of arc around a fixed axis to swing through leverage, the fulcrum force is small, can increase cutting-edge life, the machine life, the whole structure is compact, and can non-polar adjust the amount of the trip on the tool carrier, greatly improving efficiency.

摆式剪板机的上刀架在剪切过程中绕一固定轴线作圆弧摆动，通过杠杆作用，支点受力小，可提高剪切刃寿命、机器寿命，整机结构紧凑，并能无极调节上刀架的行程量，大大提高工作效率。

Ceramic bearings can produce oxidation-ho, silicon carbide, silicon nitride and so on, diameter from 3mm-50mm, precision Machinable P0, P6, P5 level; its performance characteristics are: high temperature, oil-free self-lubricating, acid, alkali and salt corrosion , wear resistance, low noise, insulating diamagnetic, since high-speed operation; metal nano-ceramic bearing its production process for a new generation of high content of nano-particles in the heat and pressure infiltration of metal surface is activated to fill the cracks and pits the metal so that 3-5 micron metal surface is more smooth solid surface, greatly reduce the friction, improve Chennai base metals, and greatly increased the life span of bearings, and its characteristics are: long life (as an ordinary stainless steel bearings 2 -- 10-fold), low noise (as an ordinary stainless steel bearings, 70%), wear-resisting, acid, alkali, salt corrosion, high temperature, load large; ceramic bearing and metal nano-ceramic bearing design and development to meet the needs of the market for high-speed, low - noise, high load, the demand for corrosion-resistant; Machinery Production Department to produce aircraft rod end joint bearing, linear guide bearings, the fuel tank of earrings, plastic bearing, non-standard side bearing components, glass door hardware, such as high-precision control products; and provide CNC machining.

陶瓷轴承可生产氧化镐、碳化硅、氮化硅等，内径从3mm-50mm，精度可加工P0、P6、P5级；其性能特点为：耐高温、无油自润滑、耐酸、碱、盐腐蚀、耐磨、低噪音、绝缘抗磁、起高速运转；金属纳米陶瓷轴承其生产工艺为新一代的高含量纳米级微粒在热和压力的作用下被激活渗入金属表面，填补金属缝隙和凹坑，使金属表面3-5微米表面更光滑坚固，大大降低其摩擦力，提高金属的奈酸碱性，并大大提高了轴承的寿命，其特性为：长寿命（为普通不锈钢轴承的2-10倍）、低噪音（为普通不锈钢轴承的70%）、耐磨、耐酸、碱、盐腐蚀、耐高温、负载大；陶瓷轴承与金属纳米陶瓷轴承的设计开发以满足市场对高转速、低噪音、高负载、耐腐蚀的需求；机械生产部以生产机杆端关节轴承、直线导轨轴承、油缸耳环、塑料轴承、非标端轴承零部件、玻璃门控五金等高精度产品；并对外提供数控加工。

Introduced to settle the function that path machine settle path Roll box,The analysis settles the reason of the path Roll an inside bearings damage,Put forward the method of the concrete improvement of the extension bearings service life,And take in to put into practice,Actual usage proof,Bearings service life extension,Settle the path Roll an usage effective.

介绍了定径机定径辊箱的作用，分析定径辊箱内轴承损坏的原因，提出了延长轴承使用寿命的具体改进的方法，并加以实施，实际使用证明，轴承使用寿命延长，定径辊箱使用效果很好。

Results show that the servic.e life of TiB2/Cu electrode with a TiB2 content of 1.5 wt% reaches 7700 weld spots, which is 4 to 8 times that of Cr-Zr-Cu electrode materials when coated steel sheets are spot welded; the service life of the composite electrode reaches 30000 weld spots, 2 to 3 times that of Cr-Zr-Cu electrode materials when conventional carbon steel sheets are spot welded.

对 T i B2增强铜基复合材料作点焊电极点焊镀层钢板时的失效进行了分析，结果表明：含TiB2为1.5wt％的铜基复合材料作电极，焊接镀锌钢板的使用寿命约为7700点，是普通电极材料Cr－Zr－Cu的4～8倍，焊接普通钢板的使用寿命约为30000点，是普通电极材料Cr－Zr－Cu的2～3倍。

In order to raise the service life homemade coal cutter s, a new kind of coal cutter s suited for the conditions of our country is manufactured after analyzing the reasons why the "trump card" coal cutter s have the longest service life.

在剖析世界王牌截齿——德国截齿具有较高使用寿命原因的基础上，研制出了适合我国国情的模拟截齿，以达到提高现有国产截齿使用寿命的目的。

This paper discusses failure pattern and force of link chain hook of link chain bucket elevator, finds out the causes of short periodical fatigue failure of link chain hook and points out the key factors that influence fatigue life of the link chain hook is the fitting gap .

通过对环链斗式提升机链环钩失效形式和受力情况的分析，揭示了链环钩产生低周疲劳失效的原因，指出了在影响链环钩疲劳寿命的诸多因素中，链环钩与料斗之间的装配间隙是决定其疲劳寿命的主要因素，重新设计的链环钩解决了疲劳断裂问题，说明设计中所采取的措施是有效的。

The link plates manufactured by using high-precision friction press ensures long wear life and high fatigue strength of chain joint links, and special medium-frequency heater ensures the highest hardness, thickest hardfacing layer and longest wear life of chain pin surface and avoids sudden breaking of chain pins due to the impact force.

专用的铰孔技术确保了链条链板的节距与孔径的统一性；精密摩擦压力机锻制的链板确保了链条链板的高耐磨寿命与高抗疲劳，专用的中频加热设备确保了链条销轴表面的最高硬度与最替代日本链条的高速板链链条深的硬度层、最长的耐磨寿命，避免了链条的削轴的冲击突然断裂。

The factors to influence fatigue life of chain plate are concluded by experimental methods.

用试验方法确定了挤孔对链板疲劳寿命的影响，从理论上分析了在最佳挤孔量下，链板疲劳寿命提高的因素，用有限元法计算了 16 A链板的最佳挤孔量，并与试验结果进行了比较。

Factors that influence fatigue life of chain plate are determined with experimental methods. Factors to raise life of chain plate are analyzed with theoretical methods.

用试验方法确定了挤孔对链板疲劳寿命的影响，从理论上分析了在最佳挤孔量下链板疲劳寿命提高的因素。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。