subject: Discussion On The Stability And Reliability: Slip Ring [print this page] Slip ring with its main technical indicators have insulation performance, anti-interference performance, contact resistance and so on, based on the above three questions, the widely used in celestial navigation, photoelectric tracking, photoelectric measuring and photoelectric search and other equipment precision conductive slip ring, an analysis.
Insulating properties
The slip ring, is of course the insulating properties of the bigger the better, at least, the ring between the insulation resistance is greater than the pressure without breakdown, or slip ring reliability easy problem. The electrical slip ring composed of many rings, the ring between the distance of the smaller the better. But in reality, it depends on whether the processing of the groove, is even more important after the glue can be guaranteed after the ring between the insulation strength. The conductive ring radial dimensions big, glue easily, and small size, the glue is difficult, the insulation strength also depends mainly on the insulating material formula and glue filling process.
Anti jamming performance as the transmission of electrical signals and microwave signals to the conductive slip ring, interference resistance to do better, on the reliability of data transmission is more secure, in reality, the slip ring transmission of dozens of different signals, has high voltage AC power, high frequency alternating current, a weak small HVDC small signal, there is big current alternating current, but the conductive ring ring was very close, a variety of signal transmission in the process of mutual interferences, and electrostatic induction coupling, magnetic coupling and electromagnetic induction coupling. Electrostatic induction coupling interference caused by various interferences and so on, seriously affect the accuracy of information transmission. Therefore, do a good job of slip ring of anti-jamming performance, must from above several main factors.
Contact resistance
Why do you spend the contact resistance as a very important technical indicators? Because, if the conductive slip ring of excessive contact resistance sliding, current through the contact point of temperature will rise a lot, even will cause the wire brush and slip ring welding, at the same time contact pressure drop increase, these will affect the information transmission effect. Therefore, the contact resistance is smaller is better.
The effect of contact resistance, size factors are those? Basically have the following factors:1) the contact part of the materials
2) the contact surface of the contact form and contact pressure.
The requirements for materials are materials with good thermal conductivity, high melting point, high conductivity, small temperature coefficient of resistance, anti sulfide, oxidation resistance, corrosive gases and other characteristics, the wire brush requirements are relatively high, can choose to use gold nickel wire, nickel wire but expensive. According to the different applications, can be used to replace the Yellow wire.
The above three points, whether for slip ring users, or slip ring manufacturing, should be placed in a very important position, also can saying is Chongzhongzhi is weighed, only in this way, we can ensure the slip ring products, our basic components are security, our automated machinery and equipment is security.
