| 摘要 |
FIELD: turbine devices diagnostics technologies. ^ SUBSTANCE: method for monitoring vibration state of multiple blades on rotating operation wheel of machine includes measuring angular shaft position in plane of blade device rotation by noncontact impulse locating sensor of shaft angular position generating one impulse with each turn of shaft for 2pi/n radians angle, where n - number of blades of operation wheel, concurrently angular positions of peripheral ends of each blade are measured in rotation plane with m noncontact marker sensors placed on body along perimeter of blade device above outer ends of blades with angular step of 2pi/m radians, while current values of relative angular oscillations ϕj for each separate j blade is determined from current values of time interval tau between adjacent impulses generated by impulse locating sensor, and time deviation thetaj between matched pairs of impulses from impulse locating sensor and impulses, consecutively along shaft rotation, from m impulse marker sensors from formula ϕj = (2pi/n.tau).thetaj. Also described is system for monitoring vibration state and emergency protection of blade devices of rotor machines. ^ EFFECT: higher precision and reliability of measurements. ^ 2 cl, 3 dwg |
