Rotating Slip Ring

Rotating Slip Ring is an electromechanical device that enables continuous transmission of electrical energy, signals, or data through a rotating interface. Its core function is to solve the electrical connection problem between rotating and fixed components. Traditional Slip Rings rely on the physical contact between electric brushes and conductive rings, which can easily cause wear, noise, and electromagnetic interference due to friction. However, Rotating Slip Rings significantly improve transmission efficiency and equipment lifespan by optimizing contact materials and structural design, and are widely used in industrial automation, medical equipment, security monitoring, and aerospace fields.

Technical Characteristics

High conductivity and low contact resistance

The rotating slip ring uses precious metals (such as gold and silver) or copper alloys as conductive materials, and its contact resistance can be stably controlled at ≤ 10m Ω (industry standards usually ≤ 50m Ω), ensuring a temperature rise of ≤ 40 ℃ when transmitting high currents (such as 100A/690V). For example, in a wind turbine pitch system, a certain type of slip ring can continuously transmit 50A current, with a contact resistance fluctuation range of less than 0.5m Ω and a lifespan of over 100 million revolutions per minute. In addition, its dynamic contact resistance stability (≤ 0.01 Ω) is improved by 99% compared to traditional carbon brush slip rings (fluctuation range>5m Ω), significantly reducing signal attenuation and power loss.

High speed rotation and low-noise design

The rotating slip ring supports a maximum speed of 20000 revolutions per minute (traditional slip rings usually have 8000 revolutions per minute), and the contact pressure between the electric brush and the conductive ring is precisely tuned (2-3N), combined with self-lubricating materials, to make the operating noise ≤ 50dB (A), which is about 60% lower than that of carbon brush slip rings. In the application of industrial robot joints, a certain type of slip ring can stably transmit EtherCAT bus signals (100Mbps) at 15000 revolutions per minute, with a delay of less than 1ms, and the noise level meets the ISO 15665 standard.

Multi channel signal transmission and anti-interference capability

The rotating slip ring supports synchronous transmission of multi-channel signals (such as power, video, and control commands), with a bandwidth of up to 1Gbps (fiber optic slip ring) or 100MHz (telecommunication signal slip ring). In medical CT equipment, a certain type of slip ring can simultaneously transmit 48V/10A power and 1080P@60Hz High definition video signal, and under strong electromagnetic interference environment (such as 100V/m electromagnetic field strength), the signal error rate is less than 10 ⁻¹ ². In addition, its insulation resistance is greater than 10 ¹⁴ Ω, and its dielectric strength is greater than 5kV (DC), effectively shielding external interference.

Application scenarios and industry value

Medical equipment field

In spiral CT equipment, the rotating slip ring needs to support continuous rotation of the X-ray tube at a rate of 3-5 revolutions per second, while transmitting high-power (30kW) and high-definition video signals. A certain type of slip ring has achieved optical fiber transmission technology 4K@60fps The lossless transmission of medical images can maintain stable performance even at extreme temperatures ranging from -40 ℃ to+85 ℃. According to market research, the global market size of medical imaging equipment slip rings is expected to grow from 180 million yuan in 2023 to 280 million yuan in 2030. Rotary Slip Rings occupy over 40% of the high-end market share due to their high reliability and low maintenance costs.

Industrial Automation and New Energy

In industrial robot joints, the rotating slip ring can synchronously transmit power (48V/20A) and real-time control signals (such as EtherCAT bus) with a response delay of less than 1ms. In wind power pitch systems, a certain type of slip ring supports power transmission (690V/100A) and synchronous transmission of SCADA monitoring data, with an anti vibration ability of 10g (acceleration), meeting the IEC 61400-1 standard. In addition, the modular design of the slip ring supports quick replacement of conductive rings and brushes, reducing maintenance time by 70% compared to traditional solutions.

Aerospace and Military Industry

In satellite communication antennas, the rotating slip ring needs to withstand high radiation (total dose>100krad) and extreme temperature differences (-180 ℃ to+120 ℃) in the space environment, and its fiber transmission loss is less than 0.3dB/km in the C-band (4-8GHz). In military radar systems, a certain type of slip ring supports 360 ° unrestricted rotation of phased array antennas, with a transmission power density of 50W/cm ², while controlling the signal phase error to<0.1 ° to ensure radar detection accuracy.