[en] The availability of components built in CMC technology forms in major areas a prerequisite for the realisation of future reusable launcher engines. Apart from the efforts to introduce CMC components in the hot areas of the engine like nozzles and thrust chambers there exists an important optimisation potential in the engines through the use of CMC components in (cryogenic) turbo-pumps. By replacement of the ball bearings in the pumps by journal bearings, a significantly higher lifetime can be obtained and the inherent limitation of the turning speed of the pumps can be widely extended. The CMC journal bearings of MAN have proven their quality and reliability in numerous applications in industrial pumps. Based on this experience a research program was initiated by DLR and funded by means of the BMBF and MAN to investigate the use of this bearing type under the conditions of a cryogenic turbo-pump. Major results are presented in this paper.
Disciplines :
Mechanical engineering
Author, co-author :
Nelis, M.
Bozet, Jean-Luc ; Université de Liège - ULiège > Département de chimie appliquée > Chimie appliquée - Cryotribologie
BICKEL, M.; MAN Technologie AG, Franz-Josef-Strauss-Strasse 5, 86153 Augsburg, ALLEMAGNE
LEUCHS, M.; MAN Technologie AG, Franz-Josef-Strauss-Strasse 5, 86153 Augsburg, ALLEMAGNE
LANGE, H.; MAN Technologie AG, Franz-Josef-Strauss-Strasse 5, 86153 Augsburg, ALLEMAGNE
Language :
English
Title :
Ceramic Journal Bearing in Cryogenic Turbo-Pumps
Publication date :
June 2003
Journal title :
European Journal of Mechanical and Environmental Engineering
ISSN :
1371-6980
Publisher :
Belgian Society of Mechanical and Environmental Engineering, Bruxelles, Belgium
H. Pfeiffer, Ceramic Body Flap for X-38 and CRV, 2nd Int. Symp. on Atmospheric Re-entry Vehicles and Systems, Arcachon, France, March 2001
K. Gaffal, A.-K. Usbeck, W. Prechtl, Neue Werkstoffe ermöglichen innovative Pumpenkonzepte für die Speisewasserförderung in Kesselanlagen, VDI-Berichte 1331, VDI-Verlag 1997, p. 275.
W. Kochanowski, P. Tillack, New Pump Bearing Materials Prevent Damage to Tubular Casing Pumps, VDI-Berichte No. 1421 (1998), p. 227-242.
M. Leuchs, A. Muehlratzer, Ceramic Matrix Composite Material in Highly Loaded Journal Bearings, ASME Turbo Expo 2002, Amsterdam, paper no. GT-2002-30460
G. Grease, R. Lyda, J. Park, A. Minick, Design and Test Results of an Advanced Liquid Hydrogen Turbopump, 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conf., Los Angeles (1999), paper AIAA 99-2190
A. Muehlratzer, M. Leuchs, Applications of Non-Oxide CMCs, 4th Int. Conf. On High Temperature Ceramic Matrix Composites (HT-CMC4), Munich 2001 Wiliey-VCI, ISBN 3-527-30320-0, p. 288
J.L. Bozet, M. Nelis and M. Leuchs, M. Bickel, Tribology in liquid oxygen of SiC/SiC ceramic matrix composites in connection with the design of hydrostatic bearing, Proc. 9th European Space Mechanisms & Tribology Symposium (ESMAT), Liège, 19-21 Sept. 2001, ESA SP-480, September 2001.
J.L. Bozet et al., Tribologie en Oxygène Liquide, Matériaux et Techniques, No Hors Série, SIRPE, 1999.
J.L. Bozet, M. Nelis, The regularity of the friction coefficient, different means of characterization, Eurotrib, 1993.
NIST Standard Reference Database 12, Copyright 1986-1992 by US Department of Commerce.
J. Frene, D. Nicolas et al., Paliers et Butées, Collection des Etudes et Recherches d'Electricité de France, Eyrolles, 1990.
V.N. Constantinescu, Basic Relationships in Turbulent Lubrication and Their Extension to Include Thermal Effects, Journal of Lubrication Technology, April 1973, 147-154.
I.E. Idel'cik, Coefficients de pertes de charge singulières et de pertes de charge par frottement, Eyrolles, Paris, 1969.
J.K. Scharrer, J. Tellier and R. Hibbs, A Study of the Transient Performance of Hydrostatic Journal Bearings: Part II - Experimental Results, STLE/ASME Tribology Conference in St. Louis, Missouri, October 14-16, 1991. STLE Preprint no 91-TC-3B-2.