IMPROVING THE WEAR RESISTANCE OF THE PROTECTIVE SLEEVES OF THE CRADLE-MOUNTED PUMP WITH ELECTROMECHANICAL SURFACE HARDENING
https://doi.org/10.26897/2687-1149-2022-1-55-59
Abstract
Based on the analysis of the working condition of the cradle-mounted pumps and the specific defects of protective bushings, the authors offer a technological solution for increasing the wear resistance of the outer surface of parts by the method of electromechanical surface hardening (ESH). The article describes the effects of progressions in the structure and microhardness of the surface layer of bushings made of steel 45 and U8. The authors experimentally found that the microhardness of the samples after ESH increased from 240 НV to 765 НV for steel 45 and from 340 НV to 876 НV for steel U8. The authors designed a stand, conducted wear tests of the samples, and reproduced the application environment of the "protective sleeve - stuffing box" connection of the cradle-mounted pump. The test results have shown that, compared with standard technologies for strengthening bushes, ESH increased the wear resistance of specimens from steel 45 in 3.1 times, while those of steel U8-1.9 times. In particular, using samples made of U8 steel after ESH, instead of serial bushes made of steel 45, may increase the wear resistance of products in 6.1 times. The research results give reasons to recommend the ESH technology to improve the wear resistance of protective bushings during their manufacture and the repair of the cradle-mounted pump.
About the Authors
LILIYA V. Fedorova
Bauman Moscow State Technical University (National Research University)
Russian Federation
Russian Federation
VAN TUYEN Ngo
Bauman Moscow State Technical University (National Research University)
Russian Federation
Russian Federation
YULIYA S. Ivanova
Bauman Moscow State Technical University (National Research University)
Russian Federation
Russian Federation
TAT KIEN Nguyen
Vietnam State Technical University named after Le Qui Don
Russian Federation
Russian Federation
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Review
For citations:
Fedorova L.V., Ngo V.T., Ivanova Yu.S., Nguyen T.K. IMPROVING THE WEAR RESISTANCE OF THE PROTECTIVE SLEEVES OF THE CRADLE-MOUNTED PUMP WITH ELECTROMECHANICAL SURFACE HARDENING. Agricultural Engineering (Moscow). 2022;24(1):55-59. (In Russ.) https://doi.org/10.26897/2687-1149-2022-1-55-59
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