Qingdao Vanhon Machinery Technology Co.,Ltd.

Industry News
Relation between noise reduction of helical gear transmission and modification of shape
Jan 18, 2022

The drive noise generated by helical gear processing has always been a difficult problem in the drive industry. Common solutions are as follows: 

1. Mixing between the helical gear and other parts; 

2. The shape of the helical gear itself;


Helical gear machining can control the diameter of the system gear by using a helical gear drive, reduce the linear speed of the helical gear and distribute the force evenly. As a result, the sliding friction force and impact force on the tooth surface when the helical gear is meshed can be effectively suppressed, and the noise of the helical gear drive can be effectively reduced.

Relation between noise reduction of helical gear transmission and modification of shape(图1)

Machining of helical gears can improve the design structure and machining accuracy of gears. Gear structure design is also directly related to noise reduction. Appropriately improve the machining accuracy of helical gears and reduce errors. When the gears are meshed, the manufacturing precision of the gears directly affects the noise intensity. The lower the accuracy, the higher the joint noise. On the other hand, if the machining accuracy of the gear is properly improved and the gear error is reduced, the meshing performance can be improved and the noise can be reduced. For example, the pitch error of the gears is reduced by causing the meshing shock of the gears. When the gear rotates due to pitch error, the angular velocity changes rapidly, and the shock causes the entire gear shafting to vibrate. Especially when the gear rotates at high speed, it will generate strong noise.

 

The pitch error of helical gear machining has a great influence on the noise in the single error of the gear. The pitch error is getting bigger and bigger, and the noise is bigger. But since the two are not just proportional. Even if we have gears with different levels of error for the enterprise, the rate of change of noise will vary depending on the speed. Every time a stressful load is applied to the gear, the bending deformation of the gear teeth far exceeds the pitch error. At this time, the factors affecting the environmental noise mainly depend on the deformation of the gear teeth after the load is applied.




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