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US 12,674,398 B2Granted
Hybrid bonded configuration for blade outer air seal (BOAS)
AssigneeRtx Corporation
InventorsPaul M. Lutjen, John R. Farris, Brian T. Hazel, Matthew A. Devore, John A. Sharon, James F. Wiedenhoefer, Mario P. Bochiechio
Life of this patent
Estimating the term…
Abstract
A method of assembling a part is provided and includes forming a first section of the part, defining, in the first section, passages with dimensions as small as 0.005 inches (0.127 mm), forming a second section of the part, metallurgically bonding the first and second sections whereby the passages are delimited by the first and second sections and executing the metallurgically bonding without modifying a condition of the passages.
Claims17
A method of assembling a part, the method comprising:
- building up a multi-layered first section of the part;
- defining passages in the multi-layered first section;
- building up a multi-layered second section of the part;
- metallurgically bonding each layer of the multi-layered first and second sections to neighboring layers whereby the passages are delimited by respective layers of the multi-layered first and second sections;
- and
- executing the metallurgically bonding without modifying a condition of the passages,
- wherein the passages are fluidly coupled to a cooling circuit, the method further comprises defining additional passages that mirror the passages of the multi-layered first section in the multi-layered second section and the metallurgically bonding of the multi-layered first and second sections comprises metallurgically bonding the multi-layered first and second sections by FAST along a line centered between the passages and the additional passages.
4 more elements
A method of assembling a part, the method comprising:
- building up a multi-layered first curved section of the part;
- defining passages in the multi-layered first curved section;
- building up a multi-layered second curved section of the part;
- metallurgically bonding each layer of the multi-layered first curved and second curved sections to neighboring layers whereby the passages are delimited by respective layers of the multi-layered first curved and second curved sections;
- and
- executing the metallurgically bonding without modifying a condition of the passages,
- wherein the metallurgically bonding comprises field assisted sintering technology (FAST) utilizing high amperage pulsed direct current (DC) to heat the multi-layered first curved and second curved sections for bonding through Joule heating while under uniaxial compression that accommodates respective curvatures of the multi-layered first curved and second curved sections,
- wherein the passages are fluidly coupled to a cooling circuit, the method further comprises defining additional passages that mirror the passages of the multi-layered first curved section in the multi-layered second curved section and the metallurgically bonding of the multi-layered first curved and second curved sections comprises metallurgically bonding the multi-layered first curved and second curved sections by FAST along a line centered between the passages of the multi-layered first curved section and the additional passages.
5 more elements
A method of assembling a blade outer seal (BOAS) of a gas turbine engine to form a curved outer air passage with a distal tip of a turbine blade, the method comprising:
- building up a multi-layered first curved section of the BOAS;
- defining passages in the multi-layered first curved section;
- building up a multi-layered second curved section of the BOAS;
- metallurgically bonding each layer of the multi-layered first curved and second curved sections to neighboring layers whereby the passages are delimited by respective layers of the multi-layered first curved and second curved sections;
- and
- executing the metallurgically bonding without modifying a condition of the passages,
- wherein the metallurgically bonding comprises field assisted sintering technology (FAST) utilizing high amperage pulsed direct current (DC) to heat the multi-layered first curved and second curved sections for bonding through Joule heating while under uniaxial compression that accommodates respective curvatures of the multi-layered first curved and second curved sections,
- wherein the passages are fluidly coupled to a cooling circuit of the BOAS, the method further comprises defining additional passages that mirror the passages of the multi-layered first curved section in the multi-layered second curved section, and the metallurgically bonding of the multi-layered first curved and second curved sections comprises metallurgically bonding the multi-layered first curved and second curved sections by FAST along a line centered between the passages of the multi-layered first curved section and the additional passages.
5 more elements
Dependencies are inferred from the claim text.