METHOD FOR IMPROVING VIBRATION CHARACTERISTICS AND ELIMINATING VIBRATION OF TURBINE ROTORS OR ICE CRANKSHAFTS

摘要

FIELD: engines and pumps.;SUBSTANCE: invention relates machine building and can be used to improve vibration characteristics and to eliminate vibrations in structures incorporating rotary components. Method allows reducing vibration by fitting, at least, one load bearing onto the shaft to be thrown into operation prior to starting or in speeding up the shaft for the turbine or ICE to reach critical rpm and to be thrown out of operation after the above critical rpm. The aforesaid bearing is again thrown into operation with the turbine or ICE being cut off since both follow, but in a reverse sequence, the same critical rpm zone which results in the shaft being pressed against the lower part of, at least, one thrust bearing or several such bearings, thus, creating normal operating conditions for a friction pair "shaft-bearing". To determine an optimum pressing force, the ICE or turbine operating conditions are varied to pass the critical rpm zone along with measurement of the shaft vibration level. Proceeding from the minimum vibration, an optimum force of pressing the load bearing to the shaft from above is determined.;EFFECT: improved vibration characteristics, elimination of vibration in structures incorporating rotary components.;3 cl, 8 dwg