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Analysis of the Noise Origin and Solution of the Speed Reducing Motor in Feiteng Motor.
The impact of internal gear errors in the reduction motor
The main errors that cause transmission noise in planetary reduction motors are tooth shape errors, base pitch errors, tooth orientation errors, and radial runout errors of gear rings during the gear manufacturing process. It is also a problem point in controlling the transmission power of planetary reduction motors. Let's briefly explain the tooth shape error and tooth orientation error.
Under the same experimental conditions, the noise of gears with small tooth shape errors and small tooth surface roughness is 10 dB lower than that of ordinary gears. Under the same experimental conditions, the noise level of gears with small pitch errors is 6-12 dB lower than that of general gears. But if there is a pitch error, the impact of load on gear noise will be reduced.
Tooth alignment errors will result in transmission power not being transmitted across the full tooth width, and the contact area will shift towards this or that end face of the teeth, causing increased tooth deflection due to partial force, resulting in an increase in noise levels. But at high loads, tooth deformation can partially compensate for tooth orientation errors.
Installation concentricity and dynamic balance
Uneven installation will lead to imbalanced shaft system operation, and the noise will be exacerbated due to loose and tight meshing on half of the teeth. The imbalance during the installation of high-precision gear transmission will seriously affect the accuracy of the transmission system.
Internal tooth surface hardness of the reduction motor
With the development of gear hard tooth surface technology, its large load-bearing capacity, small size, light weight, and advanced transmission accuracy characteristics have made its application fields increasingly widespread. However, the carburizing and quenching used to obtain hard tooth surfaces causes deformation of the gears, resulting in increased transmission noise and shortened lifespan. To reduce noise, it is necessary to perform precision machining on the tooth surface. Now, in addition to using traditional gear grinding methods, a hard tooth surface scraping method has been developed. After correcting the tooth top and root, or reducing the tooth shape of the driving and driving wheels, the impact of gear meshing and meshing can be reduced, and then the gear transmission noise can be reduced.
Target verification of deceleration motor system
The machining accuracy of components before installation and the selection methods for components (thorough exchange, group selection, single piece selection, etc.) will affect the accuracy level of the system after installation, and its noise level is also within the scope of impact. Therefore, it is crucial to verify (or calibrate) the various objectives of the system after installation to control system noise.