Investigation on damaging of ropeway hauling-ropes by twisting within operation

索道运行中牵引绳扭损事故调查

• 批准号: 288233226
• 负责人: Professor Dr.-Ing. Karl-Heinz Wehking
• 金额: --
• 依托单位: Institut für Fördertechnik und Logistik (IFT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/288233226?language=en
• 关键词: Investigation; damaging; ropeway; hauling; ropes

Running ropes, e.g. hauling ropes of bicable jigback aerial ropeways, rotate around their axis within a ride of the system. The helix-shaped structure of a rope holds the main part of this effect, which can be separated into a non-preventable portion out of physical environmental conditions and a preventable portion due to the mechanical set-up and the combination of system-parameters. This rotation can be stored in the rope as remaining twist. Within research- and service-actions of the Institute of Mechanical Handling and Logistics of the University of Stuttgart (IFT), the results of non-destructive inspections of ropeway ropes revealed that the damage development of a hauling rope cannot be inevitably explained by obvious load-zones out of the working forces or the contact to sheaves and support towers at actual state of art. Detailed analysis of wire-break development, especially the location of wire breaks, made twisting come into focus as an accelerating parameter for rope fatigue [Briem95],[Verreet05].Up to today it has not been possible to measure and image the rotation of a rope over its total travel distance and thus to create a relation to remaining twist, respectively damage behavior. Instead only visual observation had been carried out. A new sensor, which was developed by inhouse-effort and tested successfully at the IFT, now, allows recording rotation digitally in relation to time. This reveals new, yet unknown information about the dynamic rope behavior at any section of the rope. Using these data, the twisting characteristics of hauling ropes of bicable jigback aerial ropeways can be analyzed and set in relation to relevant parameters. The aim of the project is to make the relation between rotation, remaining twist and resulting damage calculable and predictable in the practical operation of ropeways. For the first time, three fields of research will be combined to an integrated model: by continuous bending-over sheave tests with twisted lang-lay ropes, the world-wide approved Feyrer-formula will be extended to these rope constructions (field 1). Theoretical investigations on rope rotation will be developed and additionally complemented and verified by rotation measurements (field 2). Finally, measurement results of non-destructive tests will be analyzed and the residual twist will be quantified (field 3). By specifying and numbering of twist-accelerating parameters in combination with typical damages of ropes known from non-destructive tests, a new calculation method will be developed to dimension ropeway hauling ropes. This is meant to helpfully support optimization of safety, rope life time performance and availability of ropeway systems.

运行绳索，例如，双向回转架空索道的牵引绳索，在系统的乘坐装置内围绕其轴线旋转。绳索的螺旋形结构是这种效应的主要部分，它可以分为物理环境条件不可预防的部分和由于机械设置和系统参数组合而可预防的部分。这种旋转可以作为剩余扭转存储在绳索中。在斯图加特大学机械搬运和物流研究所（IFT）的研究和服务行动中，索道绳索的无损检测结果表明，牵引绳索的损坏发展不可避免地不能用工作力之外的明显载荷区或与滑轮和支撑塔的接触来解释。特别是钢丝断裂的位置，使得扭转成为绳索疲劳加速参数的焦点[Briem 95]，[Verreet 05]。到目前为止，还不可能测量和成像绳索在其总行程距离上的旋转，从而建立与剩余扭转的关系，相应地损害行为。相反，只进行了目视观察。一个新的传感器，这是由内部开发的努力和测试成功的IFT，现在，允许记录旋转数字与时间有关。这揭示了新的，但未知的信息动态绳行为在任何部分的绳子。利用这些数据，可以分析和确定双绳架背式架空索道牵引绳的扭转特性与有关参数的关系。该项目的目的是使旋转之间的关系，剩余的扭曲和由此产生的损害可计算和可预测的索道的实际操作。这是第一次，三个领域的研究将结合到一个集成的模型：通过连续弯曲的滑轮测试与扭曲的长捻绳，世界范围内认可的费勒公式将扩展到这些绳结构（字段1）。将开发绳索旋转的理论研究，并通过旋转测量（现场2）进行补充和验证。最后，将对无损检测的测量结果进行分析，并对残余扭曲进行量化（现场3）。通过对加捻参数的规定和编号，结合无损检测中已知的钢丝绳典型损伤，提出了一种新的索道牵引钢丝绳尺寸计算方法。这意味着有助于支持索道系统的安全性、绳索寿命性能和可用性的优化。