In this paper the method of transfer arrays was used to calculate the critical speed of the fire pump. Meanwhile the frequency spectrum analysis was applied in comparing the vibration level of fire pump under two different bearing conditions. The result indicates that the original bearing structure is more liable to cause bend vibration. The experiment of dynamic deflection of the pump rotors using eddy current transducer showed that overhung rotor could work reliably within the limited deflection range. S...
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