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Research Article | Open Access

Friction and wear behavior of different seal materials under water-lubricated conditions

Weigang ZHAO1, Guoyuan ZHANG2(), Guangneng DONG3
School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China
School of Mechano-Electronic Engineering, Xidian University, Xi’an 710071, China
Key Laboratory of Modern Design and Rotor-bearing System of Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China
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Abstract

The shaft mechanical face seal in a high-speed turbopump of a liquid rocket engine often operates under extremely harsh conditions. For example, a low-temperature and low-viscosity fluid (such as liquid oxygen or liquid hydrogen) is used as a lubricant. The performance of the seal rings, especially the friction and wear behavior, directly determines whether the seal functions normal. In this study, the friction and wear behavior of several ring materials are tested using a pin-on-disk tribo-tester, and the wear morphology of the ring is investigated. The friction coefficients (COFs) and mass-wear rates under dry-friction and water-lubricated conditions, which are used to simulate low-viscosity conditions, are obtained. The results show that at a pressure-velocity (PV) value of 2.4 MPa·(m/s), the COF between the copper graphite (stator) and copper-chrome alloy disk (rotor) is low (with a value of 0.18) under the dry-friction conditions, and the 5-min wear mass of the copper graphite is approximately 2 mg. Under the water-lubricated conditions, compared with other materials (such as copper-chrome alloy, S07 steel, alumina ceramic coating, and nickel-based calcium fluoride), the S07 steel with a diamond-like carbon film is preferred for use in a high-speed turbopump under extreme conditions. The results of this study can provide theoretical and experimental guidance in the design of mechanical face seals in liquid rocket engines.

Keywords

frictionwearmechanical face sealwater-lubricatedhigh-speed turbopump

References

[1]
Zhang G Y, Zhao W G. Design and experimental study on the controllable high-speed spiral groove face seals. Tribol Lett 53(2): 497-509 (2014)
Crossref Google Scholar
[2]
Zhang G Y, Chen G Z, Zhao W G, Yan X T, Zhang Y. An experimental test on a cryogenic high-speed hydrodynamic non-contact mechanical seal. Tribol Lett 65(3): 80 (2017)
Crossref Google Scholar
[3]
Yi M Z, He J W, Huang B Y, Zhou H J. Friction and wear behaviour and abradability of abradable seal coating. Wear 231(1): 47-53 (1999)
Crossref Google Scholar
[4]
Déprez P, Hivart P, Coutouly J F, Debarre E. Friction and wear studies using taguchi method: Application to the characterization of carbon-silicon carbide tribological couples of automotive water pump seals. Adv Mater Sci Eng 2009: 830476 (2009)
Crossref Google Scholar
[5]
Hirani H, Goilkar S S. Formation of transfer layer and its effect on friction and wear of carbon-graphite face seal under dry, water and steam environments. Wear 266(11-12): 1141-1154 (2009)
Crossref Google Scholar
[6]
Wang J L, Jia Q, Yuan X Y, Wang S P. Experimental study on friction and wear behaviour of amorphous carbon coatings for mechanical seals in cryogenic environment. Appl Surf Sci 258(24): 9531-9535 (2012)
Crossref Google Scholar
[7]
Young L, Benedict J, Davis J. Investigation of a unique macro/micro laser machined feature for mechanical face seals with low leakage, low friction, and low wear. In Proceedings of the ASME/STLE 2011 International Joint Tribology Conference, Los Angeles, California, USA, 2011: 211-214.
Crossref
[8]
Zhao X Y, Liu Y, Wen Q F, Wang Y M. Frictional performance of silicon carbide under different lubrication conditions. Friction 2(1): 58-63 (2014)
Crossref Google Scholar
[9]
Frölich D, Magyar B, Sauer B. A comprehensive model of wear, friction and contact temperature in radial shaft seals. Wear 311(1-2): 71-80 (2014)
Crossref Google Scholar
[10]
Cui G J, Li J X, Wu G X. Friction and wear behavior of bronze matrix composites for seal in antiwear hydraulic oil. Tribol Trans 58(1): 51-58 (2015)
Crossref Google Scholar
[11]
Towsyfyan H, Gu F, Ball A D, Liang B. Tribological behaviour diagnostic and fault detection of mechanical seals based on acoustic emission measurements. Friction 7(6): 572-586 (2019).
Crossref Google Scholar
[12]
Zhang G Y, Yan X T, Zhang Y, Zhao W G, Chen G Z. Study on the water-lubricated high-speed non-contact mechanical face seal supported by a disc spring. J Braz Soc Mech Sci Eng 40(7): 351 (2018)
Crossref Google Scholar
[13]
Vila M, Carrapichano J M, Gomes J R, Camargo S S Jr, Achete C A, Silva R F. Ultra-high performance of DLC-coated Si3N4 rings for mechanical seals. Wear 265(5-6): 940-944 (2008)
Crossref Google Scholar
[14]
Shankar S, Kumar P K. Frictional characteristics of diamond like carbon and tungsten carbide/carbon coated high carbon high chromium steel against carbon in dry sliding conformal contact for mechanical seals. Mech Ind 18(1): 115 (2017)
Crossref Google Scholar
[15]
Erdemir A, Martin J M. Superior wear resistance of diamond and DLC coatings. Curr Opin Solid State Mater Sci 22(6): 243-254 (2018)
Crossref Google Scholar
[16]
Zhang G Y, Dang J Q, Zhao W G, Yan X T. Tribological behaviors of the thick metal coating for the contact mechanical seal under the water-lubricated conditions. Ind Lubr Tribol 71(2): 173-180 (2019)
Crossref Google Scholar
[17]
Gao S Y, Xue W H, Duan D L, Li S. Tribological behaviors of turbofan seal couples from friction heat perspective under high-speed rubbing condition. Friction 4(2): 176-190 (2016)
Crossref Google Scholar
[18]
Zhang G Y, Yuan X Y, Dong G N. The tribological behavior of Ni-Cu-Ag-based PVD coatings for hybrid bearings under different lubrication conditions. Tribol Int 43(1-2): 197-201 (2010)
Crossref Google Scholar
[19]
Zhang G Y, Zhao W G, Yan X T, Yuan X Y. A theoretical and experimental study on characteristics of water-lubricated double spiral-grooved seals. Tribol Trans 54(3): 362-369 (2011)
Crossref Google Scholar
[20]
Zhang G Y, Zhao W G, Tian Y X. Experimental study on the water lubrication of non-contacting face seals for turbopumps. Ind Lubr Tribol 66(2): 314-321 (2014)
Crossref Google Scholar
Friction
Volume 9 Issue 4,
August 2021
Pages 697-709
DOI: 10.1007/s40544-020-0364-5
Cite this article:
ZHAO W, ZHANG G, DONG G. Friction and wear behavior of different seal materials under water-lubricated conditions. Friction, 2021, 9(4): 697-709. https://doi.org/10.1007/s40544-020-0364-5
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