SYSTEM FOR INVESTIGATING TURBO-MACHINE BLADE DEFORMATIONS

摘要

The invention relates to measuring equipment and can be used in aircraft engine or power machine in tests and debugging turbomachines. The aim of the invention is to expand the functionality of the system due to the possibility of measuring radial gaps. The objective is achieved by employing peripheral optical fiber sensor 2 and the special design of the amplitude-code converters 11. Each of the two sensors mounted in the housing around the periphery of a turbomachine blade comprising two pri- emo-transmitting optical fiber 5 and 6, the illuminating fibers which are connected to the emitter 9 and the intake - to the photodetector 10. When the passage of the blade 1 at the sensor 2 at the output of the photodetector 10 is formed a pair of bell-shaped pulses, which are applied to the amplitude-coded pre-forming 11 converts ratio ie pulse amplitude into a digital code that is proportional to the radial gap between the ends of the blade and the housing Turbo- machines. During further processing by the computing unit 24, the gap value is recalculated in the blade deformation in the radial direction. Information on the amount of bending deformation of the blade is the lag time of the first pulse of the pair of sensor pulses relative to the root 2 pulse obtained via the root of the sensor 3. This time interval is converted into a code using the time -kodovyh transducer 19. Information on a turbomachine rotor rotation period is supplied to the bus 25 data from meter 22 the rotation period in which the output pulses generated by the sensor 4 revolutions periodically received. cl cl J C h u of about