| 摘要 |
PROBLEM TO BE SOLVED: To keep away a dangerous rotation frequency from the rotation frequency of a turbo-pump which varies following to the thrust of an engine. SOLUTION: As a bearing to support the rotary shaft of a turbo-pump, a static pressure type slide bearing is used, and for the pressure feeding to the static pressure type slide bearing, the output pressure of the turbo-pump, that is, a part of the liquid fuel 1 from a liquid outlet, is utilized. The rigidity of the bearing is changed by regulating the feeding pressure, by a pressure governing mechanism 63 provided in a feeding route 61, to convert the natural frequency of the bearing, so as to keep away a dangerous rotation frequency area from the rotation frequency of the turbo-pump.
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