Application and characteristics of rubber elastic wheels(橡胶弹性车轮的运用特点)

 

With the increasing demand of environmental protection concept and ride comfort, people put forward high requirements on the running stability and noise control of light rail vehicles passing through the urban center.The city street light rail route must adapt to the terrain, curve radius is very small, plus the line for Subgrade of concrete structures, therefore, to improve the rigidity; light rail vehicle running stability, reduce noise and reduce the wear of the rubber wheel, which is a very effective measures for.

  Usually the wheelset and its axle box all belong to the quality under the spring. The impact of line irregularity on the wheel rail is directly proportional to the sprung mass, which results in serious wheel and rail wear and large noise. Rubber elastic wheels can be used to improve the vibration, noise and wheel rail wear in three aspects.

  Rubber elastic wheel can reduce the vertical impact acceleration between wheel and rail, mainly because compared with ordinary wheels, elastic wheels can greatly reduce the quality of wheelset.

  Rubber elastic wheel can significantly reduce the noise, mainly due to rubber can absorb high-frequency vibration, reduce impact, and make the wheel and rail friction between improved. Of course, lower wheel mass, resulting in wheel rail impact reduction, rubber elastic wheel is also an important reason to reduce noise.

  In addition, the ordinary wheel, because the diaphragm effect tyre rolling on a track and the noise through the wheel core and greatly strengthened, and in the form of noise transmitted to the vehicle body, and the elastic rubber wheels, the noise can be isolated from the rubber layer.

  Due to the axial elastic rubber elastic wheels, the wheel flange wear is greatly reduced. In addition, rubber elastic wheels can reduce the tangential impact force caused by sudden acceleration and deceleration, which can also reduce wheel wear.

 

  In foreign countries, rubber elastic wheels in railway vehicles (especially in the use of light rail vehicles) has been more common, more than three of the elastic wheel is a kind of fundamental reason it can be widely used in light rail vehicles.

在环境保护观念和乘座舒适性要求日益增强的今天,人们对穿行于城市中心地带的轻轨车辆的运行平稳性和噪音控制提出了很高的要求。由于轻轨路线必须适应城市街道地形,曲线半径很小,再加上线路路基多为混凝土结构,刚性很大;因此,采用橡胶弹性车轮来提高轻轨车辆的运行平稳性、降低噪音和减少轮轨磨耗,是一项非常行之有效的措施。

  通常轮对及其轴箱的全部质量均属于簧下质量。线路不平顺在轮轨间造成的冲击与簧下质量成正比,会导致车轮与钢轨磨损严重并伴有较大噪音。采用橡胶弹性车轮,就可在冲击振动、噪声和轮轨磨耗等三个方面得到明显的改善。

  橡胶弹性车轮之所以能够降低轮轨间的垂向冲击加速度,主要是因为与普通车轮相比,弹性车轮能大大减少轮对中的质量。

  橡胶弹性车轮之所以能明显降低噪声,主要是由于橡胶能吸收高频振动、降低冲击、并使轮轨间的摩擦得到改善。当然轮对簧下质量减少,导致轮轨冲击降低,也是橡胶弹性车轮运行噪音降低的重要原因。

  另外,采用普通车轮时,由于轮箍在轨道上滚动而出现的噪声会通过轮芯的膜片作用而大大强化,并以体噪声的形式传至车体,而采用橡胶弹性车轮时,该噪声可以被橡胶层隔绝。

  由于橡胶弹性车轮的轴向弹性,使得轮缘磨耗大大降低。另外,橡胶弹性车轮可以降低由于突然加速、减速而引起的轮轨间的切向冲击力,这同样可以降低车轮的磨耗。

  在国外,橡胶弹性车轮在铁路机车车辆(特别是在轻轨车辆)上的运用已经比较普遍,弹性车轮以上的三个有点是其能在轻轨车辆上得到广泛运用的根本原因。




Writen by: Railteco 66 like 2018-01-21




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