公开(公告)号：US11624290B2

公开(公告)日：2023-04-11

申请号：US17143115

申请日：2021-01-06

Applicant: General Electric Company

Inventor： Nathan Evan McCurdy Gibson ,  Christopher Jon Potokar ,  Hariharan Manickavasagam Sarojini ,  Arnab Sen ,  Bikramjit Chatterjee

IPC: F01D11/02

Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. Primary and starter seal teeth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Non-rotatable face surface is mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region. Biasing means may include coil springs within spring chambers of circumferentially spaced cartridges. Tongues extend inwardly from spring chambers into grooves in slider.

公开(公告)号：US20210148243A1

公开(公告)日：2021-05-20

申请号：US17143115

申请日：2021-01-06

Applicant: General Electric Company

Inventor： Nathan Evan McCurdy Gibson ,  Christopher Jon Potokar ,  Hariharan Manickavasagam Sarojini ,  Arnab Sen ,  Bikramjit Chatterjee

IPC: F01D11/02

Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. Primary and starter seal teeth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Non-rotatable face surface is mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region. Biasing means may include coil springs within spring chambers of circumferentially spaced cartridges. Tongues extend inwardly from spring chambers into grooves in slider.

公开(公告)号：US10900369B2

公开(公告)日：2021-01-26

申请号：US16129218

申请日：2018-09-12

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Nathan Evan McCurdy Gibson ,  Christopher Jon Potokar ,  Hariharan Manickavasagam Sarojini ,  Arnab Sen ,  Bikramjit Chatterjee

IPC: F01D11/02

Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. Primary and starter seal teeth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Non-rotatable face surface is mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region. Biasing means may include coil springs within spring chambers of circumferentially spaced cartridges. Tongues extend inwardly from spring chambers into grooves in slider.

公开(公告)号：US10161259B2

公开(公告)日：2018-12-25

申请号：US14878862

申请日：2015-10-08

Applicant: General Electric Company

Inventor： Nathan Evan McCurdy Gibson ,  Rahul Anil Bidkar ,  Azam Mihir Thatte ,  Narayana Shastry ,  Hariharan Manickavasagam Sarojini

IPC: F01D11/00 ,  F16J15/44 ,  F01D11/02 ,  F01D11/16 ,  F01D11/14 ,  F01D11/08 ,  F01D11/04 ,  F01D11/10 ,  F01D11/12

Abstract: A seal apparatus for a rotary machine, including a plurality of sealing assembly segments surrounding a rotor element which is mounted for rotation about a longitudinal axis and has an outer surface. Each of the segments includes a shoe with one or more labyrinth teeth facing the outer surface and a shoe plate disposed downstream of the one or more labyrinth seal teeth and configured to generate an aerodynamic force between the shoe plate and the outer surface of the rotor element. The shoe is further configured to be flexible in a radial-axial plane in response to fluid film forces generated by interaction of the sealing assembly segment and the rotor element, and an axially-oriented beam spring connects the shoe to a stationary seal body.