机械

根据滑块工作行程的最大速度与平均速度的比值要求设计曲柄滑块机构,首要问题是确定滑块工作行程的最大速度位置。对不同类型的曲柄滑块机构中滑块最大速度的位置问题进行探讨得出结论:偏置的曲柄滑块机构,滑块最大速度出现在曲柄与连杆相互垂直处;对心的曲柄滑块机构,滑块最大速度一般不出现在曲柄与连杆相互垂直处,随着杆长比的增大,滑块在最大速度处曲柄与连杆越接近90°。利用Excel软件对一实例求出其滑块最大速度时的位置。

It is important to determine the position of the maximum slider velocity in design of slider-crank mechanism with the ratio of maximum and average velocity of slider.The position of the maximum slider velocity in different type of slider-crank mechanism has been researched in this paper,some conclusions have been obtained,with regard to the offset slider-crank mechanism,the maximum velocity of slider is in the position where crank and linkage are in right angle,but to the centric slider-crank mechanism,the maximum velocity of slider is not in the position where crank and linkage are perpendicular,with increment of linkage-crank length ratio,a linkage and crank are more nearly perpendicular in the position of maximum slider.And then giving an example,the position of the maximum slider velocity has been solved with Excel software.