The objective of this investigation is to develop a novel powder-lubricated rotor bearing system damper concept for use in high-temperature, high-speed rotating machinery such as advanced aircraft gas turbine engines. The approach discussed herein consists of replacing a conventional oil lubrication or frictional damper system with a powder lubrication system that uses the process particulates or externally-fed powder lubricant. Unlike previous work in this field, this approach is based on the postulate of the quasi-hydrodynamic nature of powder lubrication. This postulate is deduced from past observation and present verification that there are a number of basic features of powder flow in narrow interfaces that have the characteristic behavior of fluid film lubrication. In addition to corroborating the basic mechanism of powder lubrication, the conceptual and experimental work performed in this program provides guidelines for selection of the proper geometries, materials and powders suitable for this tribological process. The present investigation describes the fundamentals of quasi-hydrodynamic powder lubrication and defines the rationale underlying the design of the test facility. The performance and the results of the experimental program present conclusions reached regarding design requirements as well as the formulation of a proper model of quasi-hydrodynamic powder lubrication.
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ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
June 3–6, 1991
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7902-3
PROCEEDINGS PAPER
The Basics of Powder Lubrication in High-Temperature Powder-Lubricated Dampers Free
Hooshang Heshmat,
Hooshang Heshmat
Mechanical Technology Incorporated, Latham, NY
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James F. Walton
James F. Walton
Mechanical Technology Incorporated, Latham, NY
Search for other works by this author on:
Hooshang Heshmat
Mechanical Technology Incorporated, Latham, NY
James F. Walton
Mechanical Technology Incorporated, Latham, NY
Paper No:
91-GT-248, V005T14A040; 12 pages
Published Online:
March 10, 2015
Citation
Heshmat, H, & Walton, JF. "The Basics of Powder Lubrication in High-Temperature Powder-Lubricated Dampers." Proceedings of the ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General. Orlando, Florida, USA. June 3–6, 1991. V005T14A040. ASME. https://doi.org/10.1115/91-GT-248
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