SYSTEM FOR CONTROL OF COOLING OF TURBOMACHINE DISKS AT THERMOCYCLIC TESTS FOR STRENGTH

摘要

FIELD: manufacture of turbomachines. SUBSTANCE: disk 2 of turbomachine rotates in thermal vacuum chamber according to preset program; disk 2 is heated by means of automatic induction heating control devices 3 and is cooled with air fed via supply pipe lines 9 through cut-off valves 22 and control members 10 with aerodynamic nozzles 11; heating and cooling will be effected according to the signals furnished from automatic jet cooling control device 4. Error signal at output of summing-up unit 6 between signals from temperature sensor 21 and program-setting device 5 acts on induction heating control device and temperature regulator which forms through third switch 18 control signal to flow regulator 15 which controls position of control member 10 by this signal and by signals from flow sensor 12 and sensor 13 showing the position of actuator 8. Cut-off valve 22 opens or closes by the signal from comparator 19. EFFECT: enhanced accuracy of temperature control of disk 2 due to initial opening of control members 10 before beginning of cooling. 3 dwg