摘要
针对目前对一体式活塞连杆结构的空压机振动研究不完善现状,建立该类型空压机主传动部分的简化数学模型,进行曲柄连杆的运动计算,并分析曲柄连杆比λ对活塞侧向力的影响;利用ADAMS建立空压机刚柔混合模型,进行多体动力学仿真,通过对活塞连杆的惯性力和气缸侧向敲击力的计算,分析空压机的振动特性及主要原因。另外根据平衡条件对偏心轮进行优化设计,并进行多工况仿真验证,结果表明优化后的偏心轮使得沿径向主轴所受水平惯性力降低55%左右,所受竖直惯性力降低82%,对减少空压机的惯性振动有良好效果。
To reduce the vibration of the air compressor with piston-rod structure,this paper establishes a simplified mathematical model of the main transmission of the air compressor,to analyze the impact of the crank-rod ratio(λ)on the lateral force which is applied on the piston.Then multi-body dynamics simulation based on ADAMS is established in terms of a rigid-flexible hybrid model of air compressor.Through the calculation of the inertial force of the piston-rod structure and the lateral impact force of the cylinder,the cause of the vibration and corresponding characteristics of the air compressor have been revealed.Additionally,the eccentric wheel is optimized according to the equilibrium conditions,and the multi-case simulation is verified.The results show that the optimized eccentricity reduces the horizontal inertial force along the radial main axisand the vertical inertial force by 55%(approx.)and 82%,respectively.It proves that the proposed investigationis feasible on reducing the inertial vibration of the air compressor.
作者
吴飞
吴振宇
张虎
WU Fei;WU Zhenyu;ZHANG Hu(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)
关键词
空压机
ADAMS柔性建模
惯性力平衡
优化设计
air compressor
ADAMS flexible modeling
inertial force balance
optimized design
