METHOD AND MONITORING SYSTEM FOR CONTROLLING CONDITION AND EMERGENCY PROTECTION OF BLADE DEVICES OF ROTOR ENGINES Russian patent published in 2004 - IPC

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 2π/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 2π/m radians, while current values of relative angular oscillations ϕ_j for each separate j blade is determined from current values of time interval τ between adjacent impulses generated by impulse locating sensor, and time deviation θ_j between matched pairs of impulses from impulse locating sensor and impulses, consecutively along shaft rotation, from m impulse marker sensors from formula ϕ_j = (2π/n·τ)·θ_j. 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