A Rotatable Sealing Coupling for Cryogenic Uses
The need has arisen, in the past few years, for extremely rigorous environmental testing. The requirements for these tests have increased in complexity almost immeasurably, while the ability to satisfy these requirements has been somewhat lagging. Recent interest, and need, has been exhibited in the introduction of cryogenic fluids to rotating, spinning, and oscillating objects while under vacuum—specifically, spacecraft and thermal conditioning shrouds. Rotating or spinning objects are presently unable to receive a continuous feeding of fluids, cryogenic or otherwise. Flexible tubing has little application here if rotation is more than a few revolutions in one direction. This unavoidable deficiency emphasizes the need for a new type of cryogenic seal for continuously rotating or spinning objects. This paper introduces such a device called the Rotatable Sealing Coupling.
KeywordsRotational Velocity Leak Rate Leak Detector Coupling Temperature Feed Pressure
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