Turbo machine having a device for suppression of vibrations

摘要

The turbine, having a symmetrical wall surrounding its blades (6) with apertures (13) linked to an outer cavity (11), incorporates a symmetry breaker in the cavity to prevent acoustic resonance at certain turbine speeds. The symmetry breaker is in the form of a section of tube (15) fitted with a pre-stressed locking force inside the cavity, or a part of the cavity's outer wall with a convex surface projecting into the cavity.