Introducing motion into a simulated void
Space simulation chambers are complex environments where equipment must function under ultra-high vacuum. A primary engineering challenge is introducing reliable rotational motion for components like solar array actuators or sensor platforms without breaching the vacuum seal. Magnetic Fluid Vacuum Rotary Feedthrough units are recognized as optimal solutions for introducing rotational motion into vacuum or differential pressure environments. They are gaining attention as a high-performance vacuum feedthrough technology for this exact purpose.
Technical demands of cryogenic testing
These chambers often operate under extreme conditions to simulate the space environment. For example, to achieve the tremendous pumping speed needed for space simulation in the presence of xenon, cold panels are added to the chamber. The panels are cooled to temperatures below 50K by single stage cryocoolers. A small cryo panel of 600mm in diameter has a pumping speed of 16,000 l/s inside the chamber. Any feedthrough connecting a drive motor outside the chamber to a device inside must maintain its seal integrity across this thermal gradient and under continuous rotation.
The dual axle advantage and recent improvements
A dual axle configuration is necessary when two independent, concentric shafts must be driven into the vacuum chamber. This design complicates the sealing challenge. Manufacturers are working to improve these components by making them more reliable and reducing potential leakage points. One significant development involves changes to the ferrofluid used inside the feedthrough to form the rotational seal. Customers can benefit from reduced operating torque as a result. This is particularly valuable for dual axle systems where minimizing friction and heat generation is important for long-duration tests.
Reliability as the foremost criterion
In space simulation, where tests can run for months to qualify satellite components, failure is not an option. The products have been widely adopted as clean shaft bearings to address various challenges faced by customers who prioritize reliability above all. With over 30 years of dedicated experience from established manufacturers, the technology is mature. The latest generation of vacuum fittings is critical in maintaining ultra high vacuum conditions needed for many advanced research projects.
We manufacture a range of magnetic fluid feedthroughs, including single and dual axle models, for such demanding research and development applications.