内燃机配气机构系统刚度的虚拟设计  

Virtual design of rigidity for valve train system in internal combustion engine

作　　者：李佳[1] 刘震涛[1] 刘忠民[2] 张鹏伟[1] 俞小莉[1] 

机构地区：[1]浙江大学能源工程学系动力机械及车辆工程研究所,杭州310027 [2]杭州电子科技大学机械工程学院,杭州310018

出　　处：《农业工程学报》2012年第6期44-49,I0004,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：浙江省自然科学基金(Y1111044)

摘　　要：为了确定内燃机配气机构两质量简化模型中配气机构系统刚度这一关键参数,对现有WD615机型的配气机构进行了三维建模,应用不同结构单元划分方式进行了有限元计算,在此基础上求解了多种型号配气机构系统刚度。在标定试验系统精度的基础上,采用激光传感技术对仿真结果进行了试验验证。研究结果表明:应用有限元方法计算配气机构刚度较为准确,计算结果和试验结果误差在5%之内。以刚度统计结果为基础,得出随着气门质量的增加配气机构系统刚度近似成二次多项式增加,气门系统自振频率位于30000～50000次/min。该研究为开发新型配气机构提供了依据。In order to define the stiffness of the two-mass valve train model which is the key parameter of the valve train system, the finite element calculation was carried out by using different methods of compartmentalizing component based on the creation of the 3D models of every component of the valve train of WD615. The stiffness values of various valve train systems were calculated by using the simulation method mentioned above. After the calibration of the test system, the simulation results were tested by using the technique of laser measurement. The simulation and test result showed the reasonability and accuracy of the FEM method and the measurement error was limited to 5%. It coule be concluded that there was a quadratic polynomial increase between the valve train stiffness and the quality of the valve while the natural frequency of valve system waved between 30 000 to 50 000 times/min based on the statistical results. This research could provide the theory basis of developing the new valve train system.

关 键 词：有限元法 刚度 内燃机 配气机构 

分 类 号：S218.5[农业科学—农业机械化工程]