Steam turbine labyrinth seal
Steam turbine labyrinth seal
(OP)
Hello
Have any body have installed 4 part labyrinth seal instead of 2 part?. These is because due to external leakage we are planning to replace the labyrinth seals and after checking them we noticed that the new ones have 4 portions and the old one have 2 portions; beside that difference, everything is Ok.
The steam turbine is a Coppus model RLHA244IN202COPPUS.
Regards,
Miguel Díaz.Due to vapor RLHA244IN202
Have any body have installed 4 part labyrinth seal instead of 2 part?. These is because due to external leakage we are planning to replace the labyrinth seals and after checking them we noticed that the new ones have 4 portions and the old one have 2 portions; beside that difference, everything is Ok.
The steam turbine is a Coppus model RLHA244IN202COPPUS.
Regards,
Miguel Díaz.Due to vapor RLHA244IN202





RE: Steam turbine labyrinth seal
As long as the ends are machined at the proper angle and the supplier provides you with the proper butt gapp clearances, I would think 4 piece would be better than 2 since this would allow more contact with the hook fit, which should establish your cold radial clearances.
IF your design does not utilize hook fits, but some type of a floating ring, the 2 piece might be better, but a 4 piece should suffiece
RE: Steam turbine labyrinth seal
RE: Steam turbine labyrinth seal
But there are lots of designs that have multiple segments.. where each segment is held towards the shaft with springs under the segment. which slides in a tee groove
RE: Steam turbine labyrinth seal
if you talking about stages then they vary