MATHEMATICAL AND NUMERICAL MODELING OF FREE TURNING SEGMENTS OF SELF-REGULATED STATIC-DYNAMIC GAS BEARING
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For citation: Beschastnyh V.N., Bulat M.P., Gorbachev A.A., Volobuev I.A. Mathematical and numerical modeling of free turning segments of self-regulated static-dynamic gas bearing. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2017, vol. 17, no. 3, pp. 525–542 (in Russian). doi: 10.17586/2226-1494-2017-17-3-525-542
Subject of Research.The paper deals with the study of a self-regulating radial gas-dynamic bearing. Methodology for its calculation and design is presented. We have developed the modeling methods for the bearing surface rotational segments stable in angle of rotation, load and rotor speed. We have also developed a numerical method for the segment position determining when the zero moments are acting on it and the method of the segment stability analyzing in this position. Main Results. A technique for determining the stable equilibrium position of a segment was described. For different values of the lubricating layer average thickness and the speed of the shaft, the values and direction of the torque on the segment and the resultant forces acting on the segment were determined. The pressure plots in the lubricating layer of the segment were obtained. Parametric dependences of the design characteristics of the bearing on the load on the segment and on the rotational speed of the shaft were defined. Practical Relevance. The developed calculation technique can be used in the design of hybrid air bearings during the selection of the segment rotation axis position. The rotation of the segments enables to extend the range of self-regulation of air bearings and, within certain limits, to parry the overloads that occur on the shaft.
Acknowledgements. This work was supported by the Ministry of Education and Science of the Russian Federation (agreement No. 14.578.21.0203, ID RFMEFI57816X0203 for Applied Scientific Research).
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