What are the Applications of Pneumatic Slip Rings?

 

Introduction

Pneumatic slip rings, also known as pneumatic-electric rotary joints or pneumatic-liquid slip rings. We use them to transfer pressurized or vacuum gases from the static inlet of a rotating device to the rotating outlet. Unlike common electrical slip rings, they are more suitable for transmitting fluid media, including steam, hydraulic oil and vacuum gases. Moreover, it can maintain a stable and separated liquid connection while rotating 360 degrees. But how exactly is this achieved?


Working Principle of Pneumatic Slip Rings

The main components include the stator, rotor, seals, bearings and transmission wires. Among them, the stator is usually stationary and connected to the external gas and liquid supply sources. The rotor rotates together with the rotating parts and transfers gas or liquid from the stator to the rotor through the internal channels and then distributes them to the corresponding working parts.


Features of Pneumatic Slip Rings

  1. Continuous Rotation: This slip ring allows unrestricted continuous rotation in 360° direction while maintaining a sealed connection. Even if a part of the device moves, the pressurized air or gas can flow freely without interruption.
  2. High Sealing Technology: It is made of high-quality seals such as PTFE and POM to prevent leakage and maintain pressure integrity, especially in high-speed or high-pressure applications.
  3. Multiple Channels: It has multiple channels, and each channel is independently sealed to prevent cross-contamination. Therefore, it can simultaneously transmit different gases or fluids or connect multiple circuits.
  4. Multi-Material Compatibility: The slip ring is made of materials compatible with the type of gas or fluid they are going to transmit and can resist corrosion during transmission. Common options include stainless steel, aluminum and POM polymers.

Different Applications of Pneumatic Slip Rings

  1. Industrial Automation: Pneumatic slip rings are commonly found in equipment such as rotating machinery, robotic arms and assembly lines. Take the automotive assembly line as an example. The slip ring connects the fixed air source with the rotating joints of the robotic arm. When the pneumatic grippers on the robotic arm are grabbing automotive parts, the pneumatic slip ring continuously provides compressed air with appropriate pressure.
  2. Packaging Machines: When the packaging machine heat-seals food packaging bags, the rotating heat-sealing parts need compressed air to drive the cylinders to complete the opening and closing of the heat-sealing molds. Pneumatic slip rings supply air to the machine parts responsible for sealing, cutting or material handling to keep the automated packaging process.
  3. Rotary Platforms: In the rotary worktables of CNC or the rotary loading platforms of testing equipment, they firmly clamp the material blocks for turning and milling. Pneumatic slip rings transfer compressed air to the clamping devices of the rotary platform, and through the pneumatic fixtures, sufficient clamping force is generated to make them operate normally.
  4. Tire Manufacturing: In the tire forming stage, various rubber components are bonded together through molds. And the pneumatic slip ring is responsible for connecting the inflation equipment with the tire valve to transfer air into the molds or inflate the tires.
  5. Medical Equipment: When an MRI machine cools its superconducting magnets, it needs to transfer cooling gas to the rotating cooling pipeline system through a pneumatic slip ring. At the same time, it also assists some rotating scanning parts to adjust the scanning angles and positions, so as to obtain more accurate human body image data.

Conclusion

In conclusion, pneumatic slip rings are widely used in industrial automation, packaging machines, rotary platforms, tire manufacturing and medical equipment fields. If you want to know more about relevant knowledge, please feel free to get professional purchasing insights and customized solutions from the experts of ByTune, the industry leader. 

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