In the process of vibration, gear noise is also a source worthy of attention due to the meshing of gears. The synchronous gear used in the general ultrafine vertical milll works in the strong vibration environment. Because of the larger impact of rodent, the impact noise is higher. Because of the large internal resistance and large elastic deformation of rubber, it can not only reduce the impact of rodent but also absorb more vibration energy. Therefore, flexible spoke gear can be used to reduce noise.

 

During the vibration, the spring end and the support produce relative sliding. Because of dry friction, the friction noise frequency is high and the sound is large, which makes the local noise of the ultra fine vertical mil spring position increase obviously. After using rubber spring, the noise can be reduced obviously.

 

Ultrafine vertical mil has feeding chute and discharge chute. The chute is welded with steel plate. The collision and friction of materials in the chute will also affect the noise of ultra fine vertical mil. Therefore, the noise of chute can be reduced by laying rubber lining plate on the inner wall of feed and discharge chute.