旁通小孔与环形通道并联型轿车磁流变液减振器

发布时间：2019-01-17 07:46

【摘要】：针对磁流变液减振器体积补偿与活塞换向时阻尼力非圆滑过渡问题,提出一种具有串级环形通道、并联旁通小孔、浮动活塞充气补偿的磁流变液减振器结构。依据磁流变液流变学测试数据确定Biplastic-Bingham本构模型参数;建立阻尼通道内磁流变液准稳态流动微分方程,结合本构模型得到流经活塞流量与上下腔压力差的关系;研究活塞旁通小孔节流、导向环状间隙节流、浮动活塞补偿和各部件间摩擦力共同作用下阻尼力的计算方法;依据国产某型号轿车悬架技术参数,设计制作磁流变液减振器样机,并对样机进行示功特性测试。测试结果表明:减振器示功曲线圆润饱满,各种励磁电流下磁流变阻尼器的理论阻尼值与测试值能较好吻合。
[Abstract]:Aiming at the non-smooth transition between the volume compensation of magnetorheological fluid shock absorber and the damping force of piston commutator, a structure of magnetorheological fluid shock absorber with cascade annular passage, parallel bypass hole and floating piston inflatable compensation is proposed. The parameters of the Biplastic-Bingham constitutive model are determined according to the rheological data of the magnetorheological fluid, the differential equation of the magnetorheological fluid flow in the damping channel is established, and the relationship between the flow rate through the piston and the pressure difference between the upper and lower cavity is obtained by combining the constitutive model. The calculation method of damping force under the joint action of piston bypass orifice throttle guide annular clearance throttle floating piston compensation and friction between components is studied. According to the technical parameters of a domestic car suspension, the magneto-rheological fluid damper prototype is designed and fabricated, and the power performance of the prototype is tested. The test results show that the power curve of the damper is round and full, and the theoretical damping value of the magneto-rheological damper under various excitation currents is in good agreement with the measured value.
【作者单位】：重庆大学光电技术及系统教育部重点实验室智能结构中心;中国兵器装备集团隆昌减振器公司;
【基金】：重庆市基础与前沿计划研究项目(CSTC2013JJB60001) 中央高校基本科研业务费项目(106112015CDJZR125517) 国家自然科学基金项目(51575065)
【分类号】：U463.335.1

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