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A Study on the Safety Estimation of Table Liner for Vertical Roller Mill Using HDM

구멍뚫기법을 이용한 수직형 롤러 분쇄기용 테이블 라이너의 안전성 평가에 관한 연구

  • 이동우 (동아대학교 대학원 기계공학과) ;
  • 홍순혁 (동아대학교 대학원 기계공학과) ;
  • 조석수 (삼척대학교 기계 정밀기계 자동차공학부) ;
  • 주원식 (동아대학교 기계공학과)
  • Published : 2004.08.01

Abstract

The vertical roller mill is the important machine grinding and mixing various crude materials in the manufacturing process of portland cement. Table liner is one of grinding elements of vertical roller mill and is subjected to the cyclic bending stress by rollers load and the centrifugal force by rotation of table. It demands $4{\times}10^7$ cycle but has $4{\times}10^6{\sim}8{\times}10^6$ cycle. It fractures at the edge of grinding path of outside roller. The repair expense for it amounts to $30\%$ of total maintenance of vertical roller mill. Therefore, this study shows the fracture mechanism of table liner for vertical roller mill using HDM and fatigue analysis and makes the estimation for safety of vertical roller mill.

Keywords

Fatigue Fracture;Goodman Diagram;Hole-drilling method;Stress Intensity Factor;Plastic Zone Depth;Table Liner;Vertical Roller Mill

References

  1. Tongyang Cement Co., 1993, 'Maintenance of Table Liner for Vertical Roller Mill,' pp. 16-19
  2. Minoshima, K., Endo, Mo, Miyawaki, T. and Komai, K, 1995, 'Three Dimensional Quantitative Analysis of Brittle Fracture Surface with SEM/STM/AFM,' JSME, Vol. 67, No.2, pp. 1587-1594
  3. Chiaki Tsubouchi, Takeshi Horikawa, 2000, 'Analysis of Connecting Rod Fatigue Fracture Surface by X-Ray Fractography,' J. Society Material Science, Japan, Vol. 49, No. 10. pp. 1143-1147 https://doi.org/10.2472/jsms.49.1143
  4. ASTM Standard E647-95, 1995, 'Standard Test Method for Measurement of Fatigue Crack Growth Rates,' ASTM standards Sec.3, Vol. 3. No.1, pp. 591-596
  5. Gross B. and Srawley, J. E., 1965, 'Stress Intensity Factor for Single - Edge-Notch Specimens in Bending or Combined Bending and Tension by Boundary Collocation of a Stress Function,' NASA, Technical Note, D-2603
  6. ASTM E837-99, 1999, 'Standard Test Method for Determining Residual Stresses by the Hole-drilling Strain-Gage Method,' Annual Book of ASTM, pp. 1-6
  7. Levy, N., Marcal, P. V., Ostengren, W. J. and Rice, J. R., 1971, Int. J. Fract. Mech, 7, 143
  8. Boo, M. H., Park, Y. C., Yun, D. P., Huh S. C. and Kim, T. H., 1999, 'Evaluation of Fracture Mechanics Parameter using X-Ray Fractography Method of WC-Co Cemented Carbides,' J. of KSME(A), Vol. 23, No. 10, pp. 1709-1715
  9. Newman, J. C., Jr. and Raju, I. S., 1979, 'Analysis of Surface Cracks in Finite Plates under Tension or Bending Loads,' NASA, Technical Note, TP-1578
  10. Smith, J. O., 1942, The Effect of Range of Stress on the Fatigue Strength of Metals, Univ. of Ill., Eng. Exp. Sta. Bull., p. 334
  11. Shigley, J. E. and Mitchell, L. D., 1983, 'Mechanical Engineering Design. 4th ed.,' McGraw-Hill: New York, p. 293
  12. Jubvinall, R. C., 1967, 'Engineering Considerations of Stress, Strain and Strength,' McGraw-Hill : New York, pp. 233-234
  13. Shigley, J. E. and Mitchell, L. D., 1983, 'Mechanical Engineering Design. 4th ed.,' McGraw-Hill : New York, p. 300
  14. Haugen, E. B. and Wirsching, P. H., 'Probabilistic Design,' Machine Design, Vol .47, pp. 10-14