Abstract

A Spiral Grooved Self-acting Gas Thrust Collar Bearing, which has high wear resistance is investigated. This thrust bearing has a washer made of hard, wear resistive material at its most inner part, and the surface of this washer stands out from the surface of the other part of the bearing, so that contact with the rotor at the start/stop of rotation occurs only on the surface of the washer. This bearing is also designed for take-off and landing at low rotational velocity to prevent wear. Here, thee design method of this bearing is presented. Also measured are the load-floating height characteristics and the floating height-rotation characteristics. These measured results are compared with theoretical predictions.

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