In the design and manufacture of conductive slip rings, many factors need to be considered. We know that conductive slip rings belong to electrical contact applications and usually fall into two categories. One is a rotating electrical contact, that is, a conductive slip ring, an electrical rotary joint, and the other is a linear sliding electrical contact. The most widely used one is electric locomotive pantograph, which is currently widely used on high-speed trains and high-speed trains. The electric pantograph is a complex electromechanical system integrating tribology, hydraulics, pneumatic pressure and tension control. A conductive slip ring is a frictional electrical contact driven by carbon brushes. Later came sheet metal and mercury. At present, the multi-contact structure of precious metal wires is becoming more and more popular. This structure originated from the invention patent of American engineer Norris in the 1980s. Compared with traditional carbon brushes and mercury slip rings, electric slip rings have extremely important applications and obvious advantages in complex systems. Conductive slip rings are also called brushes, bus rings or collector rings. In practical applications, a very important issue is the working life of the slip ring. There are several factors that affect the working life of the slip ring: the structure of the conductive slip ring, the life span of different structures varies dozens or hundreds of times, the material of the conductive slip ring, the assembly process of the slip ring, the working speed of the conductive slip ring, the Ring design. The rotation speed of the slip ring itself and the temperature rise of the bearing; Joule heat of the electrical contact of the slip ring: Since temperature rise will affect the reliability of the slip ring, the influence of temperature must be considered during design and selection. Key points in material selection for conductive slip rings, also known as slip rings, bus rings or central rotary joints. In practical applications, several key points should be paid attention to when selecting materials: 1. The actual working conditions of the slip ring installation; 2. An estimate of whether there is vibration or acceleration; 3. The working speed and wear resistance of the slip ring; 4. The insulation characteristics of the conductive slip ring. When selecting the type of conductive slip ring, you should pay attention to the following points. Otherwise, it may lead to improper selection and affect customer use: on-site slip ring working conditions: speed, temperature, environmental water vapor content, on-site cable direction, on-site power and signal current and voltage, how to improve the reliability of precious metal wire conductive slip rings; precious metal wires must be provided The reliability of conductive slip rings must start from the following aspects: Compared with mercury slip rings, precious metal wire conductive slip rings have the following characteristics: 1. Mercury slip rings contain toxic metal mercury, which is not environmentally friendly and has poor maintainability. 2. Compared with precious metal wire slip rings, the electromagnetic interference of mercury slip rings is difficult to solve. 3. When there are many loops, such as dozens of loops, the mercury slip ring cannot be untied. Generally speaking, when the number of turns is small and the current is large, mercury slip rings will have some advantages. 1. The structural design of the conductive slip ring must be reasonable and must be formed according to the on-site application. 2. The material selection of the conductive slip ring should be appropriate. 3. The production process of the slip ring must be perfect. 4. The installation and use of slip rings must be reasonable. 5. Regular maintenance of sliding rings. At present, some slip ring manufacturers only provide customers with a product with a similar appearance, while ignoring important aspects such as slip ring selection, design, manufacturing, installation, and maintenance, resulting in poor user experience. Some imported products also have similar problems. Therefore, it is necessary to provide users with a complete solution rather than just selling a product. Precious metal multi-contact conductive slip rings originate from U.S. patents. Compared with carbon brushes, precious metal slip rings have the following characteristics: 1. Reliable contact. Precious metal multi-brush wires (via series) are typical multi-contact contacts. Compared with carbon brushes, the contact points are geometric multiples. 2. Good wear resistance. 3. There is less wear debris and it is easy to cause short circuit between conductive rings in application practice. In typical power plant production, an important daily maintenance is that the carbon powder must be cleaned regularly, otherwise it will cause the slip ring to short circuit and catch fire. Selection of conductive slip ring shell materials The selection of conductive slip ring shell materials has the following principles: 1. It must meet the needs of the on-site working environment, such as inside the rack and indoor dustproofing. Most engineering plastics can meet the requirements. If the size is too large, aluminum alloy, copper, carbon steel or stainless steel should be used. 2. Working speed and material strength must be considered. If the working speed is high, large vibration and centrifugal force will be generated, and the shell must be made of materials with sufficient strength. 3Manufacturability must be considered.