摘要
针对汽车助力器输入力加载与释放作用阶段存在的特性曲线不便观测的问题,对影响真空助力器特性曲线的因素进行了研究。对助力器特性曲线中输入力释放阶段的影响因素进行了分析和归纳,提出了一种适用于研究助力器输入力加载与释放整个过程的真空助力器建模仿真方法,利用万能试验机对助力器关键部件橡胶反作用盘进行了压缩试验,测量了非线性条件下反馈盘受力情况和变形值;建立了控制阀模型、反馈盘模型和助力器前后腔模型,并通过数值仿真的方法,研究了各个部件对助力器特性曲线的影响。研究结果表明:在真空助力器释放与加载整个阶段中,柱塞刚度对助力器特性曲线滞后力的影响较为明显,反馈盘刚度对跳跃值和跳减值的影响较大;通过将仿真结果与理论计算值进行对比可知,输出力在理论设计特性曲线的±10%内,说明所建仿真模型可以作为助力器的设计工具。
Aiming at the problem that it was inconvenient to observe the characteristic curve in the loading and release phase of the input force of the car booster,the factors affecting the characteristic curve of the vacuum booster were studied,the influencing factors of the input force release stage in the booster characteristic curve were analyzed and summarized;a model and simulation idea of vacuum booster suitable for studying the entire process of booster input force loading and release was proposed;a universal testing machine was used to perform compression tests on the rubber reaction disk;a key component of the booster,and the force and deformation of the feedback disk under non-linear conditions were measured.The control valve model,the feedback disc model and the front and rear cavity models of the booster were established,and the influence of each component on the characteristic curve of the booster was studied by means of numerical simulation.The results indicate that the stiffness of the plunger has a significant influence on the hysteresis of the booster characteristic curve during the entire stage of the vacuum booster s release and loading,and the stiffness of the feedback disc has a greater influence on the jump value and the jump loss value.Comparing the simulation result with the theoretical calculation value,the output force is within±10%of the theoretical design characteristic curve,which indicates that the built simulation model can be used as a design tool for the booster.
作者
康梦南
王先云
杨铎
李玉光
付少华
KANG Meng-nan;WANG Xian-yun;YANG Duo;LI Yu-guang;FU Shao-hua(School of Mechanical Engineering,Dalian University,Dalian 116622,China)
出处
《机电工程》
CAS
北大核心
2021年第4期489-493,共5页
Journal of Mechanical & Electrical Engineering
基金
航空动力装备振动及控制教育部重点实验室开放课题基金资助项目(VCAME201805)。
