齿轮减速机满载时，噪声增加的解决之道

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yongxiangle1969 发表于 2018-12-21 08:26
齿顶高系数或外圆直径呢？

齿顶高系数就是1.0啊

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明显的一条黑直线，有问题吗？

xjh1986818

载荷增加以后，轴的变形和箱体的变形跟着变化，同时温度升高，齿轮的错位量发生变化，因此修形时候需要同时考虑齿廓修形和螺旋角修形，否则噪音就会增加很多。

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大螺旋角磨齿，齿面会出现扭曲，说法莫衷一是！

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莱斯豪尔说，所有的展成磨齿，在磨削大螺旋角齿轮时，都会出现齿面扭曲现象。

而格里森说，不管是展成磨齿还是成形磨齿，只要有齿向修形，大螺旋角齿轮都会出现齿面扭曲！

是不是齿向不修形，同时用成形磨齿法就不会出现齿面扭曲呢？

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4. 箱体（铸铁材料）设计方面，先是根据经验进行结构设计（主要考虑刚度和声功率的散射），然后用FEA做了变形和强度分析。应该问题不大。



应该做箱体的模态分析，找出箱体结构刚性最弱的变形振动模态及其对应的各阶固有频率，如果齿轮啮合激振频率接近某阶固有频率，则会引起明显的共振噪声，对此可以设法加强箱体以改变固有频率，当然也可以修改齿轮参数达到同样目的！

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一个实例

file.rar (541.23 KB, 下载次数: 4)

2019-6-1 11:04 上传

点击文件名下载附件

一阶固有频率375赫兹，这个是高速轴轴向力特别容易引起振动和辐射噪声！

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只要各方面的加工装配精度达到图纸要求，噪声必然不会高的，或者换言之，只要有噪声问题，一定是某方面没有达到精度指标！

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When grinding helical gears an unwanted production-related twist is generated. This twist can be simulated in advance in the kissoft Release 03/2018 (module ZY6), and the influence on the flank contact can be evaluated with contact analysis.

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When designing hardened and ground gears, the grinding notch must be taken into account with regard to position and rounding radius in order toavoid stress 应力集中.

In addition to the ISO 6336standard and FEM in 2D (module ZA24), KISSsoft also provides evaluation withFEM in 3D (module ZA37): This evaluation is based on the exact loaddistribution over the tooth width and enables the consideration of crowning andaxial misalignments with respect to the load distribution, which results in amuch more precise analysis of the stresses over the tooth width.

Withthe use of protuberance hobs, the grinding notch can be avoided orsignificantly reduced. The protuberance can be specified in KISSsoft on thereference profile as well as on the tool (hobbing cutter, cutting wheel), andchecked in numerous graphics for gear teeth, tools and production.



补充内容 (2019-6-12 16:29):
stress concen-trations

补充内容 (2019-6-12 16:31):
集中，这个单词无论如何在本论坛发不出去，居然说是不良信息被拦截掉了！