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Title: Film riding seals for rotary machines

Abstract

A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward-shoe section and an aft-shoe section having one or more labyrinth teeth therebetween facing the rotor. The sealing device includes a stator interface element having a groove or slot for allowing disposal of a spline seal for preventing segment leakages. The sealing device segment also includes multiple bellow springs or flexures connected to the shoe plate and to the stator interface element. Further, the sealing device segments include a secondary seal integrated with the stator interface element at one end and positioned about the multiple bellow springs or flexures and the shoe plate at the other end.

Inventors:
; ; ; ;
Publication Date:
Research Org.:
General Electric Company, Niskayuna, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1346051
Patent Number(s):
9,587,746
Application Number:
13/562,705
Assignee:
General Electric Company NETL
DOE Contract Number:
FC26-05NT42643
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Jul 31
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Bidkar, Rahul Anil, Sarawate, Neelesh Nandkumar, Wolfe, Christopher Edward, Ruggiero, Eric John, and Raj Mohan, Vivek Raja. Film riding seals for rotary machines. United States: N. p., 2017. Web.
Bidkar, Rahul Anil, Sarawate, Neelesh Nandkumar, Wolfe, Christopher Edward, Ruggiero, Eric John, & Raj Mohan, Vivek Raja. Film riding seals for rotary machines. United States.
Bidkar, Rahul Anil, Sarawate, Neelesh Nandkumar, Wolfe, Christopher Edward, Ruggiero, Eric John, and Raj Mohan, Vivek Raja. Tue . "Film riding seals for rotary machines". United States. doi:. https://www.osti.gov/servlets/purl/1346051.
@article{osti_1346051,
title = {Film riding seals for rotary machines},
author = {Bidkar, Rahul Anil and Sarawate, Neelesh Nandkumar and Wolfe, Christopher Edward and Ruggiero, Eric John and Raj Mohan, Vivek Raja},
abstractNote = {A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward-shoe section and an aft-shoe section having one or more labyrinth teeth therebetween facing the rotor. The sealing device includes a stator interface element having a groove or slot for allowing disposal of a spline seal for preventing segment leakages. The sealing device segment also includes multiple bellow springs or flexures connected to the shoe plate and to the stator interface element. Further, the sealing device segments include a secondary seal integrated with the stator interface element at one end and positioned about the multiple bellow springs or flexures and the shoe plate at the other end.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 07 00:00:00 EST 2017},
month = {Tue Mar 07 00:00:00 EST 2017}
}

Patent:

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  • A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the sealing device segments includes a stator interface element, a shoe plate having an extended portion having one or more labyrinth teeth facing the rotor and a load bearing portion, wherein the shoe plate is configured to generate an aerodynamic force between the shoe plate and the rotor. The sealing device segment further includes a secondary seal configured to be in contact with the stator interface element at a radially outermore » end and configured to be in contact with an elevated nose section of the extended portion of the shoe plate on a radially inner end; and multiple flexible elements attached to the shoe plate and to the stator interface element.« less
  • A seal for the vertical rotary shafts of centrifugal pumps is designed so that the pump can be used for long periods, e.g., in the presence of radioactivity, without maintenance other than oiling the motor or shaft. The seal has one side exposed to the atmosphere and the other to the pump intake and means for feeding lubricant to the side toward the atmosphere and for preventing suction of the lubricant to the other side in the case of seal leakage. (D.L.C.)
  • Gas film riding seals have found wide acceptance in pipeline and process industry turbomachinery. The seals have not found many applications in either industrial or aircraft gas turbines, however. Gas turbine engines currently being designed will have higher compression ratios (greater than 30:1). The combination of increased pressure and more aggressive engine efficiency goals will severely tax the capability of present sealing systems. The film riding face seal (FRFS) has emerged as an attractive candidate for providing sealing for the hot high pressure engine compressor discharge air. Gas turbine relative surface velocity and temperature requirements in general, exceed those ofmore » other applications. In addition, the aerospace nature of the product imposes restrictions on the allowable size and weight of the seal. This paper describes development efforts currently under way to adapt the gas film riding face seal for the aircraft gas turbine engine. Also described are anticipated operational parameters for the next generation of engines, and challenges which need to be overcome to successfully apply these seals to these engines. 10 refs.« less
  • An aerodynamic seal assembly for a rotary machine includes multiple sealing segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward load-bearing section and an aft load-bearing section configured to generate an aerodynamic force between the shoe plate and the rotor. The shoe plate includes at least one labyrinth teeth facing the rotor and positioned between the forward load-bearing section and the aft load-bearing section. The sealing segment also includes at least one spring connected to a pedestal located about midway of an axial length of the shoemore » plate and to a stator interface element. Further, the sealing segment includes a rigid segmented secondary seal attached to the stator interface element at one first end and in contact with the pedestal of the shoe plate at one second end.« less
  • A fluid supply system for a rotary cutter head of mining machines comprises a plurality of nozzles for directing air flow inducing sprays in the vicinity of the cutter head, and sensor means for sensing a preselected operational condition of the fluid supply to the nozzles and for deriving a signal indicative of the sensed preselected condition.