摘要
为解决现今秸秆粉碎机的粉碎粒度不均匀、能耗高、剪切无序等问题,设计了一种啮合型粉碎齿辊。阐述了该啮合型秸秆粉碎齿廓的设计理论、建立过程,设计了以渐开线为基础的啮合型齿廓,并应用在粉碎领域。根据粉碎后秸秆作为反刍牲畜饲料的用途,确定啮合齿廓参数,分析压力角、模数、齿数对选取啮合点位置的相对滑动率的影响,从而计算出基本组合参数:齿数为19,模数为3mm,压力角为20°。与初始设计参数组合对比,该参数组合相对滑动率提高了2.02%,且模数的减小使得该粉碎齿辊的体积、重量相应减小,节省制造成本。根据得到的参数建立粉碎齿辊的三维模型,并在500r/min转速条件下进行瞬态动力学分析,发现该粉碎齿辊变形最大和所受应力最大部位皆位于啮合处,最大应力为108.19MPa,小于许用应力,满足使用要求。
To solve the problems of uneven particle size,high energy consumption,and disorderly shearing in current straw crushers,a meshing type crushing toothed roller is designed.The design theory and establishment process of the meshing type straw crushing tooth profile are elaborated,and a meshing type tooth profile based on involute is designed and applied in the crushing field.Considering the use of crushed straw as feed for ruminant livestock,the meshing tooth profile parameters are determined,the influence of pressure angle,modulus,and number of teeth on the relative sliding rate of the selected meshing point position is analyzed leading to the calculation of the basic parameter set:19 teeth,a 3 mm modulus,and a 20°pressure angle.Compared with the initial parameter set,the relative sliding rate is increased by 2.02%,and the reduction of modulus results in a corresponding decrease in the volume and weight of the gear grinding roller,thereby saving the manufacturing costs.A three-dimensional model of the gear grinding roller based on the obtained parameters is established and the transient dynamic analysis on the gear grinding roller at a speed of 500 r/min is conducted.The result shows that the parts with the maximum deformation and stress are located at the meshing point,with a maximum stress of 108.19 MPa,which is less than the allowable stress and meets the requirements for use.
作者
曹伟
余建旬
文一航
吕祥
黄开端
CAO Wei;YU Jianxun;WEN Yihang;LYU Xiang;HUANG Kaiduan(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Shaanxi Hanjiang Machine Tool Co.,Ltd.,Hanzhong 723000,China)
出处
《机械》
2025年第12期17-22,60,共7页
Machinery
关键词
秸秆粉碎
齿廓设计
相对滑动
瞬态动力学
straw crushing
tooth profile design
relative sliding
transient dynamics
