Abradeable labyrinth stator seal

Details Abradeable labyrinth stator seal Abradeable labyrinth stator seal

1991-08-15

1994-05-24

Look, Edward K.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

4151744, 277 53, 277DIG6, 428593, 428632, F01D 1108

Patent

active

053143043

ABSTRACT:
In a gas turbine engine having a laybrinth seal between an annular rotor and stator therein, in which the stator is surmounted by a honeycomb structure and the rotor has a knife edge which is mounted to rotate in close annular proximity with said honeycomb structure, an improvement is provided wherein such labyrinth seal has a layer of abradeable coating atop the honeycomb structure for the rotor knife edge to rotate proximate thereto and to rub in, without substantially damaging the knife edge nor the honeycomb structure. In one embodiment the layer of abradeable coating is mounted on a metalic foil which is mounted in turn, atop the honeycomb structure. The abradeable coating thus provided, is more yieldable and less damaging to a rotor knife edge than is the honeycomb structure of the prior art, to better preserve rotor and stator and thus the labryrinth seal. Because of such protection, the rotor knife edge can be thinner and of lighter weight and the honeycomb structure can be made of larger cell sizes, again resulting in weight savings for each lab seal, which can have one or a plurality of rotor (knife edge)-stator pairs. Further, the abradable coating seals the top of the honeycomb structure and thus blocks air flow into the honeycomb cells beneath and behind the knife edge and thus reduces losses in seal efficiency.

REFERENCES:
patent: 3053694 (1962-09-01), Daunt et al.
patent: 3423070 (1969-01-01), Corrigan
patent: 3970319 (1976-07-01), Carroll et al.
patent: 4135851 (1979-01-01), Bill et al.
patent: 4218066 (1980-08-01), Ackermann
patent: 4409054 (1983-10-01), Ryan
patent: 4460311 (1984-07-01), Trappmann et al.
patent: 4525998 (1985-07-01), Schwarz
patent: 4662821 (1987-05-01), Kervistin et al.
patent: 4936745 (1990-06-01), Vine et al.

Affiliated with

Also associated with

Rating

Abradeable labyrinth stator seal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Abradeable labyrinth stator seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abradeable labyrinth stator seal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1968949