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Title: Regenerator seal

Abstract

A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side of a rotary regenerator matrix includes the steps of forming a flat cross arm substrate member of high nickel alloy steel; fixedly securing the side edges of the substrate member to a holding fixture with a concave surface thereacross to maintain the substrate member to a slightly bent configuration on the fixture surface between the opposite ends of the substrate member to produce prestress therein; applying coating layers on the substrate member including a wear coating of plasma sprayed nickel oxide/calcium flouride material to define a wear surface of slightly concave form across the restrained substrate member between the free ends thereon; and thereafter subjecting the substrate member and the coating thereon to a heat treatment of 1600.degree. F. for sixteen hours to produce heat stabilizing growth in the coating layers on the substrate member and to produce a thermally induced growth stress in the wear surface that substantially equalizes the prestress in the substrate whereby when the crossmore » arm is removed from the fixture surface following the heat treatment step a wear face is formed on the cross arm assembly that will be substantially flat between the ends.« less

Inventors:
 [1];  [1];  [1]
  1. (Indianapolis, IN)
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
OSTI Identifier:
863961
Patent Number(s):
4284658
Assignee:
General Motors Corporation (Detroit, MI) SNL
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
regenerator; seal; method; manufacturing; hot; arm; assembly; thermally; stablilized; wear; coating; substantially; flat; surface; thereon; pressure; passages; inboard; rotary; matrix; steps; forming; substrate; nickel; alloy; steel; fixedly; securing; edges; holding; fixture; concave; thereacross; maintain; slightly; bent; configuration; opposite; produce; prestress; therein; applying; layers; including; plasma; sprayed; oxide; calcium; flouride; material; define; form; restrained; free; thereafter; subjecting; heat; treatment; 1600; degree; sixteen; hours; stabilizing; growth; induced; stress; equalizes; whereby; removed; following; step; formed; substrate whereby; coating thereon; coating layer; regenerator seal; treatment step; substantially flat; thermally induced; plasma spray; seal assembly; heat treatment; nickel oxide; substantially equal; surface thereon; alloy steel; concave surface; plasma sprayed; nickel alloy; rotary regenerator; wear surface; arm assembly; produce heat; holding fixture; arm seal; /427/29/148/219/432/

Citation Formats

Davis, Leonard C., Pacala, Theodore, and Sippel, George R. Regenerator seal. United States: N. p., 1981. Web.
Davis, Leonard C., Pacala, Theodore, & Sippel, George R. Regenerator seal. United States.
Davis, Leonard C., Pacala, Theodore, and Sippel, George R. Thu . "Regenerator seal". United States. https://www.osti.gov/servlets/purl/863961.
@article{osti_863961,
title = {Regenerator seal},
author = {Davis, Leonard C. and Pacala, Theodore and Sippel, George R.},
abstractNote = {A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side of a rotary regenerator matrix includes the steps of forming a flat cross arm substrate member of high nickel alloy steel; fixedly securing the side edges of the substrate member to a holding fixture with a concave surface thereacross to maintain the substrate member to a slightly bent configuration on the fixture surface between the opposite ends of the substrate member to produce prestress therein; applying coating layers on the substrate member including a wear coating of plasma sprayed nickel oxide/calcium flouride material to define a wear surface of slightly concave form across the restrained substrate member between the free ends thereon; and thereafter subjecting the substrate member and the coating thereon to a heat treatment of 1600.degree. F. for sixteen hours to produce heat stabilizing growth in the coating layers on the substrate member and to produce a thermally induced growth stress in the wear surface that substantially equalizes the prestress in the substrate whereby when the cross arm is removed from the fixture surface following the heat treatment step a wear face is formed on the cross arm assembly that will be substantially flat between the ends.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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