Effect of Tool-Operating Mode on Circularity Deviation in Multilobed Turbine Rotor Journal Restoration with Location on Bearing Bottom Half

  • A. V. ShchurovaEmail author
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


A progressive method of a worn turbine rotor journal restoration is machining on mounting bearing of turbine plant directly. Grinding head machines rotor journal moving to its axis while the restored journal in its rotation is located on the bearing bottom half. Thus, rotor center position keeps changing, thus, a required circularity accuracy is not achieved. The best law of grinding head radial feed speed variation is one of the methods providing machining accuracy increase. The effect of feed variation on machined surface circularity accuracy for various numbers of worn rotor journal cross section lobes is investigated. The generation of geometry computer modeling using voxel approach has detected that feed variation practically has no effect on circularity accuracy if lobes number is even. However, for the machining of rotor journals with a three-lobed radial section, the sine variation of the radial tool feed is efficient. Machining accuracy has been increased by 20% compared to the case of machining at constant feed. In all cases, using the same number of workpiece spark-out revolutions as the number of workpiece revolutions at constant tool radial feed has an essential effect on circularity accuracy.


Turbine restoration Rotor journal Location on journal Location on bearing Centerless grinding Circularity deviation Voxel modeling 



The work was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0011.


  1. 1.
    Mobile Lathe Information Sheet (2008) Alstom. France, Saint-Ouen, p 2008Google Scholar
  2. 2.
    High precision grinding machines (2008) DanobatGroupGoogle Scholar
  3. 3.
    Bloch HP, Geitner FK (2005) Machinery component maintenance and repair: practical machinery management for process plants. Elsevier Inc, USA, 630 pCrossRefGoogle Scholar
  4. 4.
    Orbital Tool Technologies (2012) Shaft and Journal Repair, USAGoogle Scholar
  5. 5.
    Portable machine tools (2011) Solutions for all in situ site machining applications. Acteon, DerbyGoogle Scholar
  6. 6.
    Brian RW (2009) Principles of modern grinding technology. William Andrew, USA, p 2009Google Scholar
  7. 7.
    Kang K (2003) Modelling of the centerless infeed (Plunge) grinding process. KSME Int J. 17(7):1026–1035CrossRefGoogle Scholar
  8. 8.
    Wu Y, Kondo T, Kato T (2005) A new centerless grinding technique using a surface grinder. J Mater Process Technol 162–163:709–717. Scholar
  9. 9.
    Xua W, Wu Y, Sato T, Lin W (2010) Effects of process parameters on workpiece roundness in tangential-feed centerless grinding using a surface grinder. J Mater Process Technol 210:759–766. Scholar
  10. 10.
    Xu W, Wu W (2011) A new in-feed centerless grinding technique using a surface grinder. J Mater Process Technol 211:141–149. Scholar
  11. 11.
    Xu W, Wu Y (2011) A new through-feed centerless grinding technique using a surface grinder. J Mater Process Technol 211:1599–1605. Scholar
  12. 12.
    Weixing X, Yongbo W (2012) Simulation investigation of through-feed centerless grinding process performed on a surface grinder. J Mater Process Technol 212:927–935. Scholar
  13. 13.
    Zakharov OV, Brzhozovskii BM (2006) Accuracy of centering during measurement by roundness gauges. Meas Tech 49(11):1094–1097CrossRefGoogle Scholar
  14. 14.
    Zakharov OV (2006) Minimizatsiya pogreshnostey formoobrazovaniya pri bestsentrovoy abrazivnoy obrabotke (Minimization of form shaping errors at centerless abrasive machining). Saratov state Technical University, SaratovGoogle Scholar
  15. 15.
    Brzhozovskii BM, Zakharov OV (2010) More precise superfinishing by means of statistical modeling. Russ Eng Res 30(12):1271–1275. Scholar
  16. 16.
    Brzhozovskii BM (2010) Obespecheniye tekhnologicheskoy nadezhnosti pri bestsentrovoy abrazivnoy obrabotke (Providing of technological reliability at centerless abrasive processing). Saratov state Technical University, SaratovGoogle Scholar
  17. 17.
    Jerard RB, Angleton JM, Drysdale RL, Su P (1990) The use of surface points sets for generation, simulation, verification and automatic correction of NC machining programs. In: Proceedings of NSF design and manufacturing systems conference, pp 143–148Google Scholar
  18. 18.
    Ilushin O, Elber G, Halperin D, Wein D, Kim M-S (2005) Precise global collision detection in multi-axis NC-machining. Comput Aided Des 37:909–920. Scholar
  19. 19.
    Liu SQ, Ong SK, Chen YP, Nee AYC (2006) Real-time, dynamic level-of-detail management for three-axis NC milling simulation. Comput Aided Des 38:378–391. Scholar
  20. 20.
    Shchurova AV (2013) Imitatsionnoye modelirovaniye obrabotki tocheniyem s bazirovaniyem po obrabatyvayemoy poverkhnosti na dve tochechnyye opory (Simulation modeling of ring workpiece which is located on machining surface turning). Bull South Ural State Uni Ser, Mech Eng Ind 13(1):86–90Google Scholar
  21. 21.
    Shchurova AV (2013) Modelirovaniye obrabotki frezerovaniyem sheyek valov turbin bazirovaniyem ikh na obrabotannuyu poverkhnost’ (Modeling of the processing by milling the necks of turbine shafts by basing them on the treated surface). In: Technological support of machine-building production: proceedings and an international correspondence scientific-technical conference, Chelyabinsk, pp 594–599Google Scholar
  22. 22.
    Shchurova AV (2016) Resheniye zadachi formoobrazovaniya tsilindricheskogo vala pri bazirovanii zagotovki na obrabatyvayemuyu poverkhnost’ (A solution of the surface generation problem for cylindrical shaft by location on its machining surface). Izvestiya tulskogo gosudarstvennogo universiteta, Tekhnicheskie nauki 8(2):44–51Google Scholar
  23. 23.
    Shchurova AV (2016) Modeling of the turbine rotor journal restoration on horizontal balancing machines. Proc Eng 150:854–859. Scholar
  24. 24.
    Shchurova AV (2017) Modeling of the turbine rotor journal restoration with location on cylindrical surface of supporting bearer. Proc Eng 206:1142–1147. Scholar
  25. 25.
    Shchurova AV (2017) Shaft axis location deviation when it grind with location on a bearing bottom half (Izmeneniye polozheniya osi vala pri yego shlifovanii s bazirovaniyem v polutsilindricheskoy opore). Izvestiya tulskogo gosudarstvennogo universiteta, Tekhnicheskie nauki 8(1):338–344Google Scholar

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.South Ural State UniversityChelyabinskRussia

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