Measurement and Analysis on Bearing Characteristics of Gas Bearing Circulator(B/Sub 1/)

摘要

The bearing loads were measured and analyzed for the gas bearing type circulator of the Helium loop HENDEL. From results of the study, it was found that the static load acting to bearing pads in the journal bearing does not remain constant as expected and is not isogonal due to the external forces from momentum changes and pressure gradient of the working gas and from electromagnetic force in the driving motor. As to the dynamic load in the bearing, it was found to depend on the static load and was also found that the absolute value of its vector is not constant in a rotation of the shaft. It was predicted and reasoned that the divergent shaft vibration is caused by the vibrational dynamic load in absolute value and relatively low stiffness of the spring-pivot. To improve weak points of the gas bearing circulator, some new design criteria are offered and the substantial methods are also indicated to realize those criteria. (Atomindex citation 18:010106)