FIELD: turbines or turbomachines.
SUBSTANCE: invention relates to the field of turbine construction and can be used as a warning device of a pre-emergency condition in connection with reduction of the radial clearance value in the flow part of the turbomachine in seals on periphery of stages or in end (intermediate) seals of shafts. Upgraded peripheral seal of the impeller includes sensors-signaling devices of movement of honeycomb inserts at grips which are installed above the segments with cellular inserts in the zone of cooling air, and not in the flow part, besides, there is no special cooling for sensors-signaling devices.
EFFECT: higher reliability of the system for diagnosing and alarming of detonations in the flow part and on the shaft of the operating machine during operation, as well as use of inexpensive and reliable equipment in the alarm system and diagnostics of grabs.
1 cl, 1 dwg
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