作者：吴红梅
作者单位：杭州职业技术学院信息工程学院, 浙江 杭州 310018
关键词：弹簧缸;密封性测试;失效模型;有限元仿真;疲劳试验
摘要：
由于汽车弹簧缸长期制动造成的气密性衰减，很难动态分析不同摩擦系数的密封圈对腔压泄露的影响。因此，该文利用双参数mooney-rivlin分析法，建立汽车弹簧缸的腔体密封性失效模型。该模型能根据密封圈的摩擦系数，动态计算出弹簧缸的气体泄漏量，通过腔压和泄漏量的比较，判断出密封圈是否失效。利用汽车弹簧缸气密性检测仪对某型弹簧缸进行测试，实验结果表明，当摩擦系数0.1时，密封圈应力分布最佳，腔体泄漏量5 kpa；当摩擦系数0.1时，密封圈应力集中而产生气密性失效，腔体泄漏量超过5 kpa。失效模型的仿真结果与试验结果相同，该失效模型正确有效。
numerical simulation on sealing test model of brake chamber
wu hongmei
college of information engineering, hangzhou vocational and technical college, hangzhou 310018, china
abstract: due to the attenuation of air impermeability, the gas leakiness of a brake chamber cannot be dynamically analyzed by its friction coefficient. therefore, a sealing model of brake chamber is proposed based on the double parameters mooney-rivlin algorithm and the von-mises stress distribute model. the leakage rate, solved by this sealing model under different friction coefficient, is used for evaluating sealing failure of brake chamber. besides, the sealing performance of a brake chamber is detected by a sealing tester of brake chamber to verify this sealing model. the experimental result shows that the leakage is less than 5 kpa when μ≤0.1 and the stress distribution of the seal ring is optimal. however, the leakage is greater than 5 kpa when μ>0.1 by reason of the seal ring failure. it indicates that the sealing model of brake chamber is valid.
keywords: brake chamber;sealing test;failure model;finite element simulation analysis;fatigue test
2016, 42(7): 141-144 收稿日期: 2016-1-16;收到修改稿日期: 2016-2-12
基金项目:
作者简介: 吴红梅(1981-),女,浙江金华市人,讲师,硕士,研究方向为机电工程、应用电子技术。
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