摘要
为了增强弹簧强度,克服当电控单体泵的凸轮轴升程增加时柱塞弹簧的剪切应力随之增加,可能会超过弹簧钢丝的许用应力而引发弹簧断裂的安全隐患,在受实际安装条件限值弹簧安装尺寸不变的情况下,通过优化选型和设计,采用椭圆形截面柱塞弹簧钢丝,运用Ansys软件对原设计的圆形弹簧钢丝和改进优化的椭圆形弹簧钢丝进行受力分析和对比。结果表明:采用优化参数设计的椭圆形截面柱塞弹簧截面圆周上应力分布相对比较均匀,消除了圆形钢丝内侧的应力集中;有效地降低弹簧的最大剪切应力,满足升程增加对弹簧强度的要求。
In order to enhance the spring strength, overcome the increase of the shear stress of the plunger spring when the camshaft lift of the electric control unit pump is up, which may exceed the hidden danger of spring breakage caused by the allowable stress of the spring steel wire, and in the case of the limitation of the actual installation condition and with no change of the spring installation size, through the optimization of the selection and design, the plunger spring adopts the elliptical section steel wire, which effectively reduces the maximum shear stress of the spring and satisfies the requirement of increasing the spring strength. Ansys software is used to make the mechanical analysis and comparison of the originally-designed circular spring steel wire and the improved elliptical spring steel wire. The results show that the stress distribution on the cross section circumference of the elliptic section plunger spring is relatively uniform by using the optimization parameters and the stress concentration inside the circular steel wire is eliminated.
作者
李勇
张大升
刘力
LI Yong;ZHANG Dasheng;LIU Li(Shandong Knng Da Precision MachiNery ManUFActUring Co.,Ltd.,LongkoU 265701,China)
出处
《内燃机与动力装置》
2018年第4期32-36,75,共6页
Internal Combustion Engine & Powerplant
关键词
柱塞弹簧
椭网钢丝
剪切应力
弹簧刚度
plunger spring
elliptical steel wire
shear stress
spring stiffness
