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Tips for 离合器片减震盘断裂技术分析 and how it is implemented | Valeo Service

Technical Service Bulletin for 离合器片减震盘断裂技术分析 803556 - Valeo Service

离合器片减震盘断裂技术分析

&nbsp; &nbsp; &nbsp; &nbsp; 近期接到经销商的反馈,修理厂部分客户同一台车更换两次以上离合片或者两件套,短期内出现离合器片减震波形片断裂。车辆无法行驶。接到反馈后,跟踪了多台故障车辆,并且进行了车况分析。 均发现离合器片断裂故障,并非离合器片本身质量问题。技术分析如下,并希望各修理厂维修技师,仔细检查问题车辆,彻底排除故障,减少返修次数。

部分客户同一台车,更换多次离合器片,均出现减震盘断裂

&nbsp; &nbsp; &nbsp; &nbsp; 经过分析,发现故障车辆飞轮平面跳动量超出维修极限。对于工作直径小于430mm的飞轮,我们建议飞轮的平面跳动量,必须小于0.15mm (在车辆上测量)。否则会导致离合器片与飞轮接触面不平整,轻微症状是离合器抖动,如果偏差较大,可能导致离合器面片受力不均,导致离合器崩簧,散架或者波形片断裂。在使用中,超出离合器最大承载扭矩,也会导致波形片断裂。

技术分析

&nbsp; &nbsp; &nbsp; &nbsp; 经过分析,发现部分故障车辆的变速箱输入轴径向跳动量超标。我们建议的输入轴径向跳动量,在花键根部位置,应不大于0.5mm 。输入轴径向跳动量超标,有部分原因是输入轴导向轴承过度磨损(部分车型无导向轴承)必须更换,部分输入轴支撑轴承过度磨损。输入轴径向跳动量过大,导致离合器片工作中翘曲变形,会导致离合器抖动。严重时则造成波形片断裂。

&nbsp; &nbsp; &nbsp; &nbsp; 针对此种情况技术分析为:使用中超出离合器最大承载扭矩。导致弹簧压缩过度,最终从弹簧座中挤出。另外有部分车辆的输入轴径向跳动量超标,也会导致离合器片受旋转力的时候,面片产生了扭转变形,最终弹簧崩出。