High damping labyrinth seal with helicoidal or helicoidal-cylindrical mixed pattern

摘要

The device is used for sealing a high pressure region in a turbomachine from a low pressure region in the turbomachine; the turbomachine has one or more statoric parts and one or more rotoric parts; the device comprises a labyrinth seal 502 having a first plurality of grooves 504 and a second plurality of grooves 506; the first plurality of grooves is disposed in a helical pattern and the second plurality of grooves is disposed in a cylindrical pattern; the labyrinth seal 502 is disposed between at least one of the one or more rotoric parts of the turbomachine and at least one of the one or more statoric parts of the turbomachine between the high pressure region and the low pressure region of the turbomachine; the helical pattern has a helix angle less than or equal to 10°, preferably between 0,5° and 5°; therefore, a stabilization effect of the turbomachine is obtained and leakage due to the second plurality of grooves is negligible.