Regenerator seal

Patent · Tue Aug 18 00:00:00 EDT 1981

OSTI ID:7009208

Davis, L C; Pacala, T; Sippel, G R

A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stabilized 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 there across 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 fluoride 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 1,600 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. 4 figs.

• Assignee: General Motors Corp., Detroit, MI (United States)
• Patent Number(s): US 4284658; A
• Application Number: PPN: US 6-096924
• OSTI ID: 7009208
• Resource Relation: Patent File Date: 23 Nov 1979
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
REGENERATORS
SEALS
MANUFACTURING
CALCIUM FLUORIDES
HEAT TREATMENTS
NICKEL OXIDES
NICKEL STEELS
PROTECTIVE COATINGS
WEAR RESISTANCE
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHALCOGENIDES
COATINGS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
NICKEL ALLOYS
NICKEL COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
STEELS
TRANSITION ELEMENT COMPOUNDS
250600* - Energy Storage- Thermal