齿形链是否有多边形效应
问答
链条传动中的多边形效应是指由于链条与链轮啮合时形成的非圆形路径而引起的一种现象。具体来说，当链条绕过链轮时，它实际上沿着一个由链节顶点构成的多边形路径移动，而不是沿着理想的圆形路径。
当链条从一个链节过渡到下一个链节时，链轮的转动半径会发生微小的变化，因为链条不是连续的而是由离散的链节组成的。随着链轮的旋转，链条上的每一个链节都会依次与链轮齿接触并脱离，这就造成了一种类似多边形的效果。多边形效应会导致链条传动系统的动力传输不稳定，会引起振动、噪音以及额外的磨损。
四川理工学院学报http://xb.suse.edu.cn/xbzk/files/2013/4/20190604154242_3742.pdf
这里面已经写明了降低多边形效应的几种方式，即使是传统的齿形链传动也照样存在多边形效应。
只是有一些齿形链（比如美国Ramsey的RPV系列齿形链）的链轮使用渐开线齿廓.
你可以把这种齿形链的传动过程想像成渐开线齿轮的内啮合传动方式。
还有这种新型Hy-Vo齿形链，采用的是变节距方式，来降低多边形效应。
A Hy-Vo chain is a type of silent chain with rocker pin joints. Benefiting from the construction of the rocker pin joint, the Hy-Vo chain can not only carry a higher torque, but also has a lower system polygon action . Therefore, the Hy-Vo chain is extensively applied to areas of heavy loads and high speeds, such as the transfer case in hybrid vehicles. The previous studies have already proved that the internal–external composite meshing mechanism is the best way to improve the transmission performance of a round pin jointed silent chain system . When an external meshing Hy-Vo chain meshes with a sprocket with the involute profile, because the essence of the external meshing is a kind of positioning, the meshing impact between the chain plate external profiles and the sprocket involute profiles is not avoidable . Supposing that the internal–external composite meshing mechanism exists in the Hy-Vo chain system, as Figure 1 shows, the left internal profile of chain plate 3 will first mesh with the sprocket before the external profiles of chain plate 2 come into contact with the sprocket; thus, the meshing impact can be mitigated. Moreover, the classical meshing theory also holds that the internal meshing profile for the internal–external composite meshing Hy-Vo chain should be a kind of arc with a certain convexity . However, the above analysis is only a kind of hypothesis, and it is just suitable for the round pin jointed silent chain system. Furthermore, whether in engineering or in a laboratory, there is no feasible internal–external composite meshing Hy-Vo chain system . Although an internal–external composite meshing Hy-Vo chain does not exist, as Figure 2 displays, some researchers have found that the transmission performance of the Hy-Vo chain system can be improved if the internal–external composite meshing chain plates can be added to the external meshing Hy-Vo chain, and they named the mixed assembly silent chain as a new type Hy-Vo chain . However, the mixed assembly Hy-Vo chain is not applied on a large scale because of its unstable performance. As a result, studying and analyzing the internal meshing profile and internal–external composite meshing mechanism of the Hy-Vo chain are necessary to perfect the meshing theory of the silent chain.
详细解释：https://www.mdpi.com/2076-3417/13/17/9581
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