“MPS-Mash” JSC (Magnitogorsk, Russia):

Dudorov E. A., Chief Designing Engineer

Magnitogorsk State Technical University, Magnitogorsk, Russia:

Zhirkin Yu. V., Cand. Eng., Prof.

E-mail (common): dea-konstruktor@mail.ru

Equipment reliability is a key indicator of preproduction. Ensuring of high-level reliability is a difficult task, for both attendants and technological personnel. One of the possible ways to increase the equipment reliability is using “oil-air” lubrication systems. The results of us ing “oil-air” lubrication systems to lubricate rolling-element bearings of work rolls a part of 2000 hot rolling mill at Magnitogorsk Integrated Metallurgical Works are considered in this work. Application of lubrication  system has caused a decrease of the lubricant consumption in eight times and sizeable increase of average resource of rolling-element bearings of work rolls (by 2.1 times). Thus the distribution of average resource of rolling-element bearings varies depending on stand, place of installation in the stand and bearing’s manufactu rer. It is revealed that the average resource of rolling-element bearings decreases at increase of rolling speed. In most cases rolling-element bearing failures occur on the fixed support as a result of axial efforts influence on it. Water and scale getting into the rolling-element bearing also take negative affect to its resource. Design changes in bearing unit have allowed to exclude this influence partially. The analysis of the data on bearing resources and variety of manufacturers has shown that the best average resource values have bearings of foreign manufacturers; domestically produced bearings give the satisfactory result thus not always correspond to the result declared by the manufacturer. In the future the received attainments will allow technicians to choose the bearings which have good resource characteristics depending on a place of their installation.

1. Zhirkin Yu. V.  Nadezhnost, ekspluatatsiya i remont metallurgicheskikh mashin : uchebnoe posobie (Reliability, exploitation and maintenance of metallurgical machines : tutorial). Moscow : Teplotekhnik, 2009. 336 p.

2. Lelikov O. P. Valy i opory s podshipnikami kacheniya. Konstruirovanie i raschet (Rolls and supports with the rolling element bearings. Construction and calculation). Moscow : Mashinostroenie, 2006.

3. Ortman G. Chernye Metally — Ferrous metals. 1985. No. 5. pp. 30– 33.

4. Dudorov E. A., Korogodina G. P., Takhautdinov R. S. et al. Sposob avtomatizirovannogo mikrodozirovannogo smazyvaniya uzlov mashin s obrazovaniem elastogidrodinamicheskoy tekushchey plenki (Method of automated ultra low dose lubrication of the machines’ parts with the formation of elastohydrodynamic flo wing film). Patent RF, No. 2414643, MPK⁷ F16N 7/30. Published: March 20, 2011. Bulletin No. 8.

 5. Zhirkin Yu. V., Dudorov E. A., Mironenkov E. I., Semenyakin E. B. Ispytanie na nadezhnost podshipnikov kacheniya rabochikh valkov chistovoy gruppy kletey stana 2000 goryachey prokatki (Reliability test of the finishing train’s rolling element bearings of working rolls of the hot-rolling mill 2000). Matematika. Prilozhenie matematiki v ekonomicheskikh, tekhnicheskikh i pedagogicheskikh issledovaniyakh : sbornik nauchnykh trudov (Mathematics. Application of mathematics in economical, engineering and pedagogical researches : collection of scientific proceedings). Under the editorship of M. V. Bushmanova. Issue 4. Magnitogorsk : Magnitogorsk State Technical University named after G. I. Nosov, 2006. pp. 147–150.

6. Mironenkov E. I., Zhirkin Yu. V., Dudorov E. A.  Issledovaniya izmeneniya svoystv smazochnogo materiala v podshipnikovykh uz lakh rabochikh valkov chistovoy gruppy kletey stana 2000 goryachey prokatki Otkrytogo Aktsionernogo Obshchestva “MMK” (Researches of changes of the lubricating material properties in the bearing units of the finishing train’s working rolls of the hot-rolling mill 2000 (“MMK” JSC)). Materialy nauchno-tekhnicheskoy konferentsii po itogam nauchno-issledovatelskikh rabot za 2004–2005 goda (Materials of scientific and technical conference on the results of the scientific and research works for 2004–2005). Magnitogorsk : Magnitogorsk State Technical University named after G. I. Nosov, 2005.

7. Klamann D.  Smazki i rodstvennye produkty. Sintez. Svoystva. Primenenie. Mezhdunarodnye standarty (Lubricants and related products. Synthesis. Properties. Application. International standarts). Translated from English. Under the editorship of Yu. S. Zaslavskiy. Moscow : Khimiya, 1988. 488 p.

8. Dudorov E. A., Zhirkin Yu. V.  Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta imeni G. I. Nosova — Bulletin of Magnitogorsk State Technical University named after G. I. Nosov. 2007. No. 4. pp. 94–96.

9. Dudorov E. A., Zhirkin Yu. V., Parshin P. R. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta imeni G. I. Nosova — Bulletin of Magnitogorsk State Technical University named after G. I. Nosov. 2009. No. 3. pp. 58–61.

10. Tekhnologicheskaya instruktsiya listoprokatnogo tsekha No. 10 Otkrytogo Aktsionernogo Obshchestva “MMK” (Technological instructions of the sheet rolling shop No. 10 of “MMK” JSC).

11. Khalafyan A. A. SТАТISТIСА 6. Statisticheskiy analiz dannykh. Trete izdanie (SТАТISТIСА 6. Statistical data analysis. Third edition). Moscow : “Binom-Press” LLC , 2007. 512 p.