Disc slip ring is a kind of slip ring, specially used to solve the problem of rotation and electric conduction in small spaces. The biggest feature of this slip ring is its small footprint. When the height is limited, the disc slip ring is the best solution. The rotor part of the disc slip ring uses concentric rings to transmit current and signals, and the concentric rings are isolated by insulating materials. The brushes are distributed on the top of the concentric ring as a stator. This slip ring can be stacked in multiple layers to provide enough passages at a limited height.
The maintenance cost of the disc slip ring is high, and dust generated by friction is easy to accumulate, resulting in insufficient pressure resistance between adjacent rings and signal interference. Therefore, the difficulty of this slip ring lies in the manufacturing process and the selection of contact materials. To ensure quality, strong development experience and high processing technology are required.
Ordinary high frequency slip rings, some capacitor slip rings and mercury slip rings belong to this category in structure. The advantages of disc slip rings are small size and high height; the disadvantages are complex structure, high cost, and high process requirements.