METHOD AND SYSTEM FOR TURBO-MACHINE DISK TEMPERATURE CONTROL BY CYCLIC BENCH TESTS Russian patent published in 1994 - IPC

FIELD: turbine manufacturing. SUBSTANCE: disk temperature, cooling air flow rate, and heating power are measured. Judging upon these parameters, a simulating temperature signal of pick-up 12 is formed, with sliding contacts of current collector device assumed closed. A control signal is formed and simulating signal is adjusted upon signal of pick-up 12. From time to time the contacts are broken and a control signal is formed upon simulating signal of pick-up 12. The system includes programmable driver 1; temperature regulator 2; induction heaters power control circuit 6; cooling air flow rate control circuit 7; disk 11; temperature pick-up 12; normalizing converter 14; switches 15, 16, 17; comparator 18; frequency divider 19; self-adjusting simulator 20 having three inputs and an output; and simulator adjusting unit 25 having two signal inputs, two control inputs, a signal output, and a control output. The simulator comprises series summer 21; multiplier unit 23; integrator 24 which output is the simulator output; and summer 22. Simulator adjusting unit 25 comprises controllable switches 28, 29, 30, 31, 34, 35, 37; summers 26, 36, integrators 32, 33; and comparators 27, 38. In the case of the current collector device fault, the feedback until the test end is make upon the simulator output signal. To this end, switch 28 is opened and switch 17 is closed because the output signal of comparator 27 by feedback break becomes equal to zero. The automatic simulator adjustment is caused by the fact that the heat transfer coefficient may be determined with possible error of 25-30% . EFFECT: enlarged operating capabilities. 5 cl, 1 dwg