Causes of short circuit of conductive slip ring and Countermeasures

The conductive slip ring is a complex and accurate component of the electromechanical system , The service life is 5 Year to 20 year , It depends on the material used and the manufacturing process of the brush slip ring . The whole life cycle needs 360° Rotational motion of . Energy to transmit various signals . therefore , Problems such as failure or signal distortion may occur in use . There are many reasons for the failure of conductive slip rings , There are mainly three aspects ：

1. Structural damage . In the carbon brush slip ring assembly , The weakest part is the bearing in the transmission system . During the operation of the equipment , Bearings are prone to aging and deflection , Cause the slip ring to fail . Different bearings have no service life , Bearing manufacturing accuracy is good , Long service life , It can basically achieve 20 year ,30 year . This has a lot to do with the price of bearings . therefore , When buying bearings , Not only can cost savings be considered .

2. Solder joint aging . According to the internal design drawings , Each conductive slip ring is an independent precious metal brush wire , The lead wire of the brush slip ring is connected with the slip ring through welding points . The slip ring has been affected by the harsh environment for a long time . as time goes on , The solder joint becomes loose , Cause abnormal signal transmission of slip ring . therefore , In the process of manufacturing this slip ring , The welding process must be strict , To ensure that each solder joint is secure . meanwhile , We also need technological innovation . at present , The long-life and durable slip ring in China adopts the integral casting process , Cause solder joint falling off and aging . And prolong the service life .

3. When the contact resistance increases , Contact resistance decreases , The contact resistance increases when the brush slip ring rotates . The current stability through the slip ring is increased , The contact pressure drop becomes more severe , The contact resistance increases . But the brush wire and slip ring are welded . The main reason for the excessive contact resistance is that the brush wire has too much pressure on the slip ring , Poor contact between brush wire and ring groove , The surface of the ring groove is rough . therefore , During the design of slip ring , The designer must calculate the reasonable brush pressure , The brush pressure is refined in the process of brush pressure modulation 、 Precise modulation , To meet the ideal brush pressure requirements to the greatest extent .

There are many reasons for the failure of mofuron conductive slip ring , And its performance 、 Reliability and life are related to many factors . And it is located in the center of the device , It's very inconvenient to maintain . Once there is a problem with the slip ring , A lot of disassembly and time cost will be wasted . therefore , When developing conductive slip rings , Not only strictly control the materials 、 Details of process and production process , We should also do well in all aspects of the test , Simulate the working environment of the conductive slip ring during the test , Comprehensively control and avoid problems and expected failures in use . meanwhile , stay R&D And manufacturing process , It is necessary to establish a slip ring manufacturer to establish an emergency mechanism for slip ring failure . Ensure that the slip ring can be timely and effectively solved in case of failure .