Analysis of the factors affecting the transmission signal of the conductive slip ring

Conductive slip ring is a device that can transmit energy and data signals between two relative rotating mechanisms , It mainly includes brush components 、 Bearing 、 Conductive ring, combined support and other parts . How does this conductive slip ring transmit signals ? Brush assembly the brush is processed and formed with alloy wire , Assemble as a whole , Symmetrical double contact with the corresponding conductive ring groove , Sliding contact with the ring groove by the elastic pressure of the brush wire , To transmit signals and energy . at present , Widely used in the sea 、 lu 、 Air and other fields . During the operation of the conductive slip ring , The static contact resistance and dynamic contact resistance change affect the stability of the slip ring , Thus affecting the signal transmission quality .

In order to ensure the stability and reliability of signal transmission of mofuron technology conductive slip ring , We tested the contact resistance of slip ring , It is found that when the dynamic contact resistance or variation of a certain ring of the conductive slip ring is large , The quality of slip ring signal transmission is poor , Analyze and summarize the reasons , There are two specific aspects ：

firstly , Slip Ring V Roughness of A-shaped surface . The working principle of this device is actually that the brush wire slides relative to the slip ring , Dry friction for signal transmission ., therefore , The conductive ring acts as a friction contact surface , The surface roughness should meet certain requirements . If the conductive slip ring V The surface is rough , The dynamic resistance of the slip ring cannot be guaranteed , And the service life of the slip ring will also be greatly affected . at present . There are many factors that affect the surface roughness of conductive ring , The main printing is the dielectric produced by the wear of brush and ring , If the user does not clean up in time , It will affect the dynamic contact resistance change of the conductive slip ring . Usually, professionals will use absolute ethanol for repeated cleaning .

second , Insufficient contact pressure of conductive slip ring , Poor contact between the brush and the conductive slip ring , Thus affecting the transmission of data signals . Because the contact pressure of the conductive slip ring is inversely proportional to the contact resistance , therefore , The contact pressure between the conductive ring and the brush is too small , It is the main cause of excessive contact resistance . therefore , In order to ensure the normal operation of the conductive slip ring , The user needs to adjust the contact pressure to the appropriate range .