TY  - JOUR
AB  - Purpose The serious friction and wear problem occurs on the mechanical seal’s faces during the start-up stage of the high-speed turbopump for a liquid rocket engine. This paper aims to propose a kind of thick metal alloy coatings on the surface of the seal’s rotor so as reduce the friction and wear.Design/methodology/approach With the pin-disk (the graphite pin and the disk with the metal coating) tribology-tester, the tribological behaviors of four metal coatings are investigated. The special friction coefficients under the dry friction, boundary friction and different temperatures of water-lubricated conditions were obtained.Findings The test results show that the thick metal coating has a good performance of the wear resistance and friction reduction; and the friction coefficients of a Sn-Sb-Cu coating under the dry friction and water-lubricated conditions are 0.377 and 0.043, respectively, and the corresponding mass wear volumes are only 2.74 and 0.81 mg, respectively.Originality/value The thick metal coating scheme for the mechanical seal’s faces might lend itself to the harsh working conditions of the low-viscosity liquid rocket engine.
VL  - 71
IS  - 2
SN  - 0036-8792
DO  - 10.1108/ILT-01-2018-0047
UR  - https://doi.org/10.1108/ILT-01-2018-0047
AU  - Zhang Guo-yuan
AU  - Dang Jia-qi
AU  - Zhao Wei-gang
AU  - Yan Xiu-tian
PY  - 2019
Y1  - 2019/01/01
TI  - Tribological behaviors of the thick metal coating for the contact mechanical seal under the water-lubricated conditions
T2  - Industrial Lubrication and Tribology
PB  - Emerald Publishing Limited
SP  - 173
EP  - 180
Y2  - 2024/04/23
ER  -