Friction and Wear of Solid-Lubricated Contact in Gas Turbine Engine Bearings PDF Download
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Author: S. Gray Publisher: ISBN: Category : Languages : en Pages : 108
Book Description
A study was performed for a high temperature solid lubricated ball bearing under conditions representative of a gas turbine engine. The performance predictions were compared to the experimental test behavior of complete ball bearings and showed good correlation. In the pin on disc type material sliding tests, the friction and wear performance of M-50, NC-132, and alpha silicon carbide pairs with HAC-1 type lubricant composite were determined. In the first test mode -- to simulate the interactions between the cage material and other bearing elements -- the pairing of HAC-1 with M-50 and NC-132 at conditions up to 30,000 rpm and 316 C showed that the HAC-1 and NC-132 pair gave the lowest friction and wear and more stable temperatures. In the second test mode--to simulate low speed skidding which occurs between the ball and race materials--rapid wear was found and friction was high. This test data was used to prepare traction coefficient models as input to the ADORE computer program for bearing performance simulation. The analysis predicted that due to the high traction coefficients, the interactive forces are quite large, erratic, and inducive to cage wear and breakage. The good agreement with full scale testing of bearings demonstrated the significance of this combined material evaluation computer modeling technique. Keywords: solid lubricant composites; high temperature ceramics.
Author: S. Gray Publisher: ISBN: Category : Languages : en Pages : 108
Book Description
A study was performed for a high temperature solid lubricated ball bearing under conditions representative of a gas turbine engine. The performance predictions were compared to the experimental test behavior of complete ball bearings and showed good correlation. In the pin on disc type material sliding tests, the friction and wear performance of M-50, NC-132, and alpha silicon carbide pairs with HAC-1 type lubricant composite were determined. In the first test mode -- to simulate the interactions between the cage material and other bearing elements -- the pairing of HAC-1 with M-50 and NC-132 at conditions up to 30,000 rpm and 316 C showed that the HAC-1 and NC-132 pair gave the lowest friction and wear and more stable temperatures. In the second test mode--to simulate low speed skidding which occurs between the ball and race materials--rapid wear was found and friction was high. This test data was used to prepare traction coefficient models as input to the ADORE computer program for bearing performance simulation. The analysis predicted that due to the high traction coefficients, the interactive forces are quite large, erratic, and inducive to cage wear and breakage. The good agreement with full scale testing of bearings demonstrated the significance of this combined material evaluation computer modeling technique. Keywords: solid lubricant composites; high temperature ceramics.
Author: E. Richard Booser Publisher: CRC Press ISBN: 9781420050455 Category : Technology & Engineering Languages : en Pages : 642
Book Description
Volume III extends this handbook series to cover new developments and topics in tribology that have occurred during the past decade. It includes in-depth discussions on revolutionary magnetic bearings used in demanding applications in compressors, high-speed spindles, and aerospace equipment. Extensive coverage is given to tribology developments in office machines and in magnetic storage systems for computers. Monitoring sensors are addressed in the first chapter, followed by chapters on specific monitoring techniques for automobiles, diesels, and rotating machines. One chapter is devoted to procedures used for tracking the remaining life of lubricants. Synthetic lubricants are discussed by outstanding specialists in this rapidly developing field. Synthetics are increasingly important in widely diverse areas, including compressors using the new ozone-layer-friendly refrigerants and a variety of extreme-temperature and environmentally-sensitive applications. Water- and gas-lubricated bearings are given similar attention. The contributors also develop a new, unified coverage for fatigue life of ball and roller bearings; for design and application of porous metal bearings; for self-contained lubrication, involving oil rings, disks, and wicks; and for plastic bearings. Each of these classes of bearings are used by the millions daily throughout industry. The three-volume handbook is an essential reference to tribologists and lubrication, mechanical, and automotive engineers. It is invaluable to lubricant suppliers; bearing companies; those working in the aerospace industry; and anyone concerned with machine design, machinery wear, and maintenance.
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division Publisher: ISBN: Category : Corrosion and anti-corrosives Languages : en Pages : 444
Author: Institution of Mechanical Engineers (Great Britain). Lubrication and Wear Group Publisher: ISBN: Category : Bearings (Machinery) Languages : en Pages : 336
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: E. Richard Booser Publisher: CRC Press ISBN: 9781420050479 Category : Technology & Engineering Languages : en Pages : 1124
Book Description
This handbook is a useful aid for anyone working to achieve more effective lubrication, better control of friction and wear, and a better understanding of the complex field of tribology. Developed in cooperation with the Society of Tribologists and Lubrication Engineers and containing contributions from 74 experts in the field, the Tribology Data Handbook covers properties of materials, lubricant viscosities, and design, friction and wear formulae. The broad scope of this handbook includes military, industrial and automotive lubricant specifications; evolving areas of friction and wear; performance and design considerations for machine elements, computer storage units, and metal working; and more. Important guidelines for the monitoring, maintenance, and failure assessment of lubrication in automotive, industrial, and aircraft equipment are also included. Current environmental and toxicological concerns complete this one-stop reference. With hundreds of figures, tables, and equations, as well as essential background information explaining the information presented, this is the only source you need to find virtually any tribology information.
Author: S. Gray
Author: S. Gray
Author: Mechanical Technology Incorporated
Author: E. Richard Booser
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Author: Institution of Mechanical Engineers (Great Britain). Lubrication and Wear Group
Author: 
Author: 
Author: Bharat Bhushan
Author: E. Richard Booser
Author: Thierry A. Blanchet