空压机有限寿命活塞设计  

Design of Limited Life Piston for Air Compressor

作　　者：李大伟 LI Da-wei(School of Automatic Control Engineering,Liaoning Equipment Manufacturing Vocational and Technical College,Shenyang,Liaoning 110161)

机构地区：[1]辽宁装备制造职业技术学院自动控制工程学院,辽宁沈阳110161

出　　处：《液压与气动》2021年第6期171-177,共7页Chinese Hydraulics & Pneumatics

摘　　要：针对采用传统经验方法设计的空压机活塞存在材料浪费、笨重、寿命无法预期等问题,提出了采用有限元设计方法。应用到空压机有限寿命活塞设计当中,实现了空压机活塞材料、结构、寿命的优化设计。主要通过对空压机活塞功能的分析及边界条件的界定,完成活塞外部受力、静应力、热应力以及寿命的计算,并采用误差评估方法对计算结果进行评估,最后对空压机有限寿命活塞进行试验测试,验证了该方法的有效性和准确性。研究结果表明:采用有限元设计方法设计的空压机活塞解决了传统经验设计带来的笨重问题,还能对活塞的寿命进行计算、预测。应用有限元预测出活塞的寿命,即可以为空压机制定维护保养计划提供更准确的依据,又可以精确确定空压机维修周期,这对提高空压机的工作可靠性和耐久性具有极其重要的意义。Aiming at the problems of material waste,bulkiness and unpredictable life of air compressor piston designed by traditional empirical method,proposes the finite element design method and put it applied to the design of air compressor piston with finite life,which realizes the optimal design of material,structure and life of air compressor piston.Mainly through the analysis of the air compressor piston functions and to define the boundary conditions,complete piston external stress,static stress,thermal stress and calculation of the life,and uses the error evaluation method to evaluate the calculation results.Finally,for the piston with limited life of the air compressor,carry out a trial test,which verifies the validity and accuracy of the method.The results show that the piston of air compressor designed by finite element method can solve the bulky problem caused by the traditional experience design,and also calculates and predicts the piston life.The application of finite element to predict the life of piston can provide more accurate basis for the development of maintenance plan of air compressor and accurately determine the maintenance period of air compressor,which is of great significance to improve the working reliability and durability of air compressor.

关 键 词：空压机 活塞 有限元 有限寿命 

分 类 号：TH138[机械工程—机械制造及自动化] TH122