公开(公告)号：US20240141797A1

公开(公告)日：2024-05-02

申请号：US17979113

申请日：2022-11-02

Applicant: General Electric Company

Inventor： Narendra Anand Hardikar ,  Scott Alan Schimmels

IPC: F01D11/00 ,  F16J15/3284

CPC classification number: F01D11/001 ,  F16J15/3284 ,  F05D2220/32

Abstract: A seal assembly for rotary machines having a wear protection assembly with an abradable covering. The wear protection assembly has one or more wear protection features that enable in-operation opening of the seal assembly by increasing a clearance between a seal rotor and a seal slider of the seal assembly. In particular, the wear protection assembly is configured to open the seal assembly and increase the clearance of the seal rotor and the seal slider during slider air-bearing wear conditions, slider counterbore wear conditions, rotor air-bearing wear conditions, or extreme vibration wear conditions. Under such or similar wear conditions (or under conditions preceding or leading up to a wear condition), the wear protection assembly yields a pressure gradient and/or a fluid flow that oppose the forces acting to decrease the clearance between the seal rotor and the seal slider.

公开(公告)号：US20240026799A1

公开(公告)日：2024-01-25

申请号：US17871063

申请日：2022-07-22

Applicant: General Electric Company

Inventor： Narendra Anand Hardikar ,  Deepak Trivedi ,  Ravindra Shankar Ganiger ,  Scott Alan Schimmels ,  Kevin Richard Graziano

IPC: F01D11/02 ,  F01D11/12

CPC classification number: F01D11/02 ,  F01D11/12 ,  F05D2220/30 ,  F05D2240/55 ,  F05D2260/80

Abstract: A seal assembly at a rotor-stator interface includes at least one non-contacting seal interface and at least one rub detection feature. The rub detection feature(s) is configured to generate a signal upon the rotor and the stator making contact at the rotor-stator interface and causing wear above a certain threshold at the rotor-stator interface. The seal assembly also includes at least one sensor arranged at the rotor-stator interface. The sensor is configured to sense the signal. The seal assembly further includes a controller communicatively coupled with the sensor(s). The controller is configured to receive the signal and estimate at least one of an amount and a location of the wear at the rotor-stator interface based on the signal.

公开(公告)号：US10890082B2

公开(公告)日：2021-01-12

申请号：US16098561

申请日：2017-04-28

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Narendra Anand Hardikar ,  Nathan Evan McCurdy Gibson

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

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. A starter seal tooth and optional deflector seal tooth are mounted on a seal teeth carrier on the rotatable member. The primary seal tooth and non-rotatable face surface are 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.

公开(公告)号：US10359117B2

公开(公告)日：2019-07-23

申请号：US15450130

申请日：2017-03-06

Applicant: General Electric Company

Inventor： Brian Joseph Prenger ,  Richard Alan Wesling ,  Nathan Evan McCurdy Gibson ,  Ravindra Shankar Ganiger ,  Narendra Anand Hardikar ,  Anand Aravindrao Kulkarni

IPC: F16J15/447 ,  F16J15/02 ,  F01D11/02 ,  F04D29/16 ,  F04D29/52 ,  F01D11/00

Abstract: Aspirating face seal between high and low pressure regions of turbomachine between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces, non-rotatable face surface mounted on annular slider on non-rotatable member. Retracting means retracts annular slider away from rotatable member and non-rotatable face surface away from rotatable surface and includes circumferentially spaced apart non-coiled springs axially disposed between slider and non-rotatable engine member. Leaf springs may include first and second ends mounted or attached to first and second mounting lugs or tabs attached to non-rotatable member and slider respectively and middle portion between ends. Springs oriented for retracting slider if slider contacts rotatable member. Primary and starter seal teeth may be mounted on carrier on rotatable member. Primary seal tooth may be on non-rotatable member and starter seal tooth on rotatable member.