What is the working principle of conductive slip ring?

Slip rings using conductive parts of sliding or rolling contact, electrostatic coupling or electromagnetic coupling, the antenna mount rotating parts and stationary parts passed between electrical signal and power device. In rotating components drive components, measuring element, and control components, must from the room to offer their transmission control signal and power supply. This requires a variety of slip ring assemblies to transmit signals and energy. Some radar need to rotate the connection line up to more than one hundred. Slip ring components according to the transmission signal frequency can be divided into: the low-frequency slip ring slip ring, intermediate and high frequency rotating hinge. Slip ring usually means only the first two. Slip ring component's performance indicators are: insulation resistance and contact resistance, medium intensity and crosstalk. For intermediate frequency slip ring, because high frequency consider shielding, impedance matching, noise voltage, etc. First of all to ensure the reliable contact, in the structural design of straight through to ensure that all lines. , therefore, request the material of brush conductive performance is good, the pressure to the slip ring, appropriate to the eccentricity of the slip ring and shaking a little, good wear resistance and friction torque is small, easy to maintain.

Low slip ring

      Use of sliding contact of the low frequency signal and energy transmission slip ring assembly . There are the usual cylindrical slip ring slip ring slip ring and the differential two kinds. Cylindrical conductive ring slip ring is divided into flat ring and V -ring . Conductive ring more wear-resistant material commonly used pure copper, silver and gold coins . Brush with palladium, gold alloy or gold-plated copper wire brushes and synthetic graphite brushes . If a larger number of slip rings , a cylindrical slip ring from the upper and lower two brushes and a differential adapter plate (Figure 1 Schematic differential slip ring ) , but its axial dimension is large, the differential slip ring can significantly reduce the axial dimension , to reduce the volume and weight. Differential slip ring from the upper and lower two brushes and a differential adapter plate components. With the antenna position on the rotating brush , the brush is fixed, the differential adapter plate up and down two contact pieces , and the corresponding contact pads connected by a wire , a differential mechanism for the orientation speed to speed 1/ 2 . Antenna rotates , a current flows to each lower brush , through a differential on the turntable one or two contact pieces circuit flow from the corresponding upper brush in order to ensure between the fixed part and the rotating part of the circuit is always on . fiber optic rotary joint sliding contact wear powder may cause a short circuit between the rings . Therefore, from the structure should ensure easy cleaning , usually with modular structure, so that on-site repair or replace components.


IF slip ring

      Used to transmit the radar frequency ( tens of MHz ) signal and the energy slip ring assembly . The slip ring high frequency need to be shielded . Transmission signals below 12 MHz can use ordinary slip ring . A ring connected to the center conductor , an outer ring over cable as shielding ring ( Figure 2 IF slip ring ) . Transmission signals above 12 MHz usually shielded coaxial type slip ring . The cross section of the slip ring groove , is essentially rectangular coaxial conductors. IF there is a capacitive slip ring ( Figure 3 capacitive slip ring frequency ) , the center conductor is annular with an insulating pad supporting the shield , the rotating part and a gap between the fixed part , and do not touch , IF signal by capacitive coupling. A limited range of rotation of the antenna case can not rotary joints , but with the cable winding device .

Slip ring applications:
● Reactor
● rotating light
● dairy production equipment
● Helicopters
● Winder
● Tanks
● beer production equipment
● Intelligent Dynamic toys
● Horizontal copper production line
● rides
● Road and Bridge Machinery
● mechanical arm
● rotary stage
● crystal furnace surgical lights
● Drilling Equipment
● smart appliances
● circular knitting machine
● Filling glucose production equipment
● aviation equipment
● heat roller
● Rotate the camera
● radar communication equipment
● tube cameras
● Shield
● cable winch
● Food Machinery
● mechanical
● Heating shaft