Key points of material selection of conductive slip ring (also known as slip ring, confluence ring or central rotating joint),
In practical application, we need to pay attention to several key points in material selection:
1. Actual installation conditions of conductive slip rings
2. Whether there is an estimated value of vibration or acceleration.
3. Working speed and wear resistance of conductive slip ring
4. Insulation characteristics of conductive slip rings
When selecting the conductive slip ring, we should pay attention to the following points, otherwise it may lead to improper selection and affect the customer's use: the working conditions of the slip ring: speed, temperature, environmental moisture content, the direction of the field cable, the current and voltage of the field power supply and signal, and how to improve the reliability of the precious metal wire conductive slip ring; To improve the reliability of the precious metal wire conductive slip ring, we must start from the following aspects: Compared with the mercury slip ring, the precious metal wire conductive slip ring has the following characteristics:
1. Mercury slip ring contains toxic metal mercury, which is not environmentally friendly and has poor maintainability.
Compared with precious metal wire slip rings, mercury slip rings are difficult to solve the electromagnetic interference problem.
3. When there are many loops, such as dozens of loops, the mercury slip ring cannot solve the problem. Generally speaking, when the number of loops is small and the current is large,
Mercury slip rings will have some advantages. 1. The structure design of the conductive slip ring must be reasonable and shaped according to the field application. 2. The material selection of the conductive slip ring should be appropriate. 3. The production process of slip rings should be perfect. 4. The installation and use of conductive slip rings must be reasonable. 5. You should keep sliding regularly.
At present, some manufacturers of conductive slip rings only provide customers with a product with similar appearance, ignoring the important links such as selection, design, manufacture, installation and maintenance of conductive slip rings, and the user experience is not good. Including some imported products, have similar problems. Therefore, it is necessary to provide users with a complete solution rather than just selling a product.
Precious metal wire multi-contact conductive slip ring originated from American patent. Compared with carbon brushes, precious metal conductive slip rings have the following characteristics: 1. Reliable contact. Precious metal multi-brush wire (via series) is a typical multi-contact contact. Compared with carbon brushes, contact is geometric multiple. 2. Good wear resistance. 3. Less wear debris easily leads to short circuit between conductive rings in application practice. In the typical power plant power generation production, an important daily maintenance is to clean the carbon powder regularly, otherwise the conductive slip ring will be short-circuited and caught fire.
The structure of conductive slip rings can be divided into three types, one is a cap-type conductive slip ring, the other is a through-hole conductive slip ring and the other is a disk-type conductive slip ring. So, what is a cap-type conductive slip ring? As the name implies, because it looks like a hat, people in the industry call it a hat-type conductive slip ring, which is mainly distinguished from its appearance. There are two main types of conductive slip rings, one is based on conductive media, such as electric slip rings, optical fiber slip rings and mercury slip rings. The other is the structure based on conductive slip rings, such as through-hole slip rings (also known as hollow shaft slip rings), cap slip rings and disk slip rings.