Determining patterns of some defect-symptom type diagnostic relations for a turboset in steady-state operation and rundown conditions

• Autorzy: Rybczyński J.
• Języki publikacji: EN

Abstrakty

EN

The article presents results of the research oriented on determining a set of diagnostic relations referring to a special, but relatively common class of turboset defects, consisting in the misalignment of great turbine set bearings with respect to their designed base positions. The paper discusses a collection of types of the diagnostic relations obtained via simulation calculations of the dynamic state of the machine in steady-state operation and transient conditions. Numerical calculations were carried-out, with the aid of a package of MESWIR codes, on a model turbine set in which the bearings have been dislocated by the maximum permissible range. For this purpose the maximum permissible misalignments of all seven turbine set bearings were calculated. The research makes it possible to formulate a system of diagnostic relations connected with the bearing lateral dislocation defect, which can make the knowledge basis for a diagnostic system.

Słowa kluczowe

EN

mechanical vibration; technical diagnostics; rotating machine; misalignment

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2007
• Tom: nr 120
• Strony: 23--51
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

Rybczyński J.

• The Szewalski Institute of Fluid-Flow Machinery, Rotor Dynamics and Slide Bearings Dept., Gdańsk, ul. Fiszera 14 80-952 Gdańsk, Poland,

Bibliografia

• [1] Vance J. M.: Rotordynamics of Turbomachinery. A Wiley - Interscience Publications, New York 1985.
• [2] Rybczyński J.: The possibilities of diagnosing of dynamic state of a rotating machine on the basis of measured trajectories of slider bearing Pins, Machine Exploitation Problems, No. 2/99 (33), 123-131, Nat. Conf. on Bearing Engineering '99, Gdańsk - Gdynia - Sopot, May 19-21, 1999 (in Polish).
• [3]Sudmersen U., Stegemann D., Reimche W., Liu Y.: Vibrational diagnostic of rotating machinery in power plants, Proc. of ISROMAC-7 Conf., Honolulu, Hawaii, USA, 1977.
• [4] Rybczyński J.: Capabilities of estimation of rotor dynamic state on the ground of trajectories of bearing journals, Transactions of the Institute of Fluid Flow Machinery, No. 116, 2005, 43-56.
• [5] Zakrzewski E.: Investigations into foundation and shaft line deformation, Proc. of Conference "25-Year-Contribution of Heat Engineering Institute to Heat Energy System Development", Łódź 1973 (in Polish).
• [6] Gerlach T., Rybczyński J., Makowiecki L.: Experiences in experimental determination of dynamical properties of selected structures, Machine Exploitation Problems, No. 3 (115) 1998, 527-550 (in Polish).
• [7] Rybczyński J.: Attempts of explanation of the reasons of vibrations of three- supported rotor recorded on the research rig for investigations of rotor dynamics, Proc. Of II Intern. Cong, of Techn. Diagnostics, Warsaw, Sept. 19 - 22, Vol. 2 (2000), 219.
• [8] Piotrowski J.: Shaft Alignment Handbook, Marcel Dekker, New York 1995.
• [9] Hainrock B. J.: Fundamentals of Fluid Film Lubrication, McGraw-Hill Inc, New- York, 1994.
• [10] Rao J., S: Vibratory Condition Monitoring of Machines, Narosa Publishing House. New Delhi, Chennai, Mumboi, Calcuta, London.
• [11] Rao J. S., Manu Sharma: Dynamic analysis of bowed rotors, Proc. of VETOMAC-1 Conf., Oct. 25-27, 2000, Bangalore, India.
• [12] Sekhar A. S., Prabhu B.S.: Effects of coupling misalignment on vibrations of rotating machinery, J. of Sound and Vibration, Vol. 185, No. 4 (1995), 655-671.
• [13] Chu F.: Stability and non-linear responses of a rotor-bearing system with pedestal looseness, J. of Sound and Vibration, Vol. 241 (2000), 879.
• [14] Rao J. S., Sreenivas R.: Dynamic analysis of misaligned rotor systems, Proc. of VETOMAC-1 Conf., Oct. 25-27, 2000, Bangalore, India.
• [15] Kiciński J., Drozdowski R., Materny P.: The non-linear analysis of the effect of support construction properties on the dynamic properties of multi support rotor systems, J. of Sound and Vibration, 206(4), 1997, 523-539.
• [16] Cholewa W., Cholewa A., Chrzanowski P., Psiuk K.: The diagnostic cards containing selected data gained from DT200 system for different load state, Study of KPKM Silesian Technical University, Gliwice 2003 (in Polish).
• [17] Rybczyński J.: Acquisition of some relations concerning bearing misalignment defects applicable in technical diagnostics, Diagnostics, No. 2 (38)/2006, 17-20, AI- METH 2006 Workshop on "Artificial Intelligence Methods on Heuristic Modeling of Objects and Processes", Ustroń, 22-24.08.2006.
• [18] Rybczyński J.: Diagnosing turbine set bearing dislocation defects based on cascade rundown characteristics, Trans, of the IFFM, No. 117, 2005, 17-38.
• [19] Rybczyński J.: Optimization of rotor critical speeds by change of features of machine's bearings, Proc. of ASME Turbo Expo 2004, Power for Land, Sea, and Air. June 14-17, 2004, Vienna, Austria, No. GT2004-54291.
• [20] Moczulski W.: Knowledge discovery in diagnostic databases, Proc. of the II Symposium on Methods of Artificial Intelligence in Mechanics and Mechanical Engineering. Gliwice, Nov. 14-16, 2001, 149-154.
• [21] Moczulski W., Szulim R.: On case-based control of dynamic industrial processes with the use of fuzzy representation, Engineering Applications of Artificial Intelligence. Special Issue on Methods of Knowledge Representation, No. 17 (4), June 2004, 371- 381.
• [22] Rybczyński J.: Permissible displacements of pairs of neighboring turbo-set bearings in relation to constructional shaft line, , Tribologia, Vol. 4/2004 (196), 142-150. Proc. of Conf. on Bearing Engineering'04, Stare Jabłonki, Sept. 22-24, 2004 (in Polish).
• [23] Rybczyński J.: Analysis of acceptable nonalignment of bearings of large power turboset, Diagnostyka, Vol. 30/2 (2004), 97; Proc. of 3rd Intern. Congr. of Techn. Diagnostics DIAGNOSTICS'2004, Poznań, Sept. 6 - 9, 2004.
• [24] Rybczyński J.: Evaluation of tolerable misalignment areas of bearings of multi- support rotating machine, Proc. of ASME Turbo Expo 2006, May 8-11, 2006, Barcelona, Spain.
• [25] Rybczyński J.: Acceptable dislocation of bearings of the turbine set considering permissible vibration and load of the bearings, Key Engng. Materials, Vols. 293-294, Sept. 2005, 433-440, Proc. of DAMAS 2005, Gdańsk, 4-6th July 2005.
• [26] Rybczyński J.: Assessment of the dynamic state of a rotating machine on the basis of bearing shaft trajectories, Tribologia, No. 2/2002, 661-676, Nat. Conf. on Bearing Engineering'02, Jastrzębia Góra, May 22-24, 2002 (in Polish).
• [27] Cholewa W., White M., F.: Inverse modelling in rotordynamics for identification of unbalance distribution, Machine Vibration (2):157-167, 1993.
• [28] Cholewa W., Kiciński J. (Eds.): Technical Diagnostics. The Methods of Inversing of Nonlinear Models of Objects, KPKM Silesian Technical Univ., Vol. 120, Gliwice 2001 (in Polish).