公开(公告)号：US20190093496A1

公开(公告)日：2019-03-28

申请号：US16098561

申请日：2017-04-28

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Narendra Anand HARDIKAR ,  Nathan Evan McCurdy GIBSON

IPC: F01D11/02 ,  F02C7/28 ,  F16J15/16 ,  F16J15/34 ,  F16J15/447 ,  F01D11/00

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. Starter seal tooth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Primary seal tooth and non-rotatable face surface are mounted on an annular slider on non-rotatable member. 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 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：US20240328325A1

公开(公告)日：2024-10-03

申请号：US18190403

申请日：2023-03-27

Applicant: General Electric Company

Inventor： Tajinder SINGH ,  Rajesh KUMAR ,  David Raju YAMARTHI ,  Bryan Jung Woo HONG ,  Narendra Anand HARDIKAR ,  Ravindra Shankar GANIGER ,  Jeffrey Douglas RAMBO

IPC: F01D11/10

CPC classification number: F01D11/10 ,  F05D2220/323 ,  F05D2240/55

Abstract: A turbine engine includes a rotor, a stator, and a seal assembly disposed between the rotor and the stator. The seal assembly includes seal segment. The seal segment includes a seal face that is configured to form a fluid bearing with the rotor. A lift channel extends within the seal segment from an opening on the seal face. The turbine engine further includes a spring assembly disposed within the lift channel. The spring assembly including a biasing element and a piston element coupled to the biasing element. The lift channel includes a lift volume portion extending is between the opening and the piston element. The piston element is movable within the lift channel based on a pressure within the fluid bearing to adjust a size of the lift volume portion.