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一、凸轮机构引起噪声的原因凸轮机构和其他机构一样,其所以成为严重的噪声源,往往是由于设计和制造工艺上存在着问题。因此,为了控制噪声,有必要对凸轮运动曲线和结构的设计进行分析。图1为凸轮机构示意图,当推杆系统完成预定的运动时,凸轮表面和推杆之间会产生作用力。依据动力学基本定律可得系统的运动方程式:mx+cx+Kx=∑F_1(1)由此可知,这一作用力∑F_1,一部分是与推杆系统的瞬时加速度成正比,一部分是与推杆系统的瞬时速度成正比,一部分是与推杆系统的位移成正比。这三部
First, the cause of the noise caused by the cam mechanism Cam mechanism and other institutions, it has become a serious source of noise, often due to design and manufacturing process there are problems. Therefore, in order to control the noise, it is necessary to analyze the cam curve and structure design. Figure 1 is a schematic diagram of the cam mechanism, when the push rod system to complete the scheduled movement, the cam surface and the push rod will produce force. Based on the basic laws of dynamics, we get the equation of motion of the system: mx + cx + Kx = ΣF_1 (1) From this it can be seen that this force ΣF_1 is partly proportional to the instantaneous acceleration of the ram system and partly to The instantaneous speed of the rod system is proportional, in part, to the displacement of the rod system. These three