A rotordynamic analysis was performed with a decant-type centrifuge, which is a kind of industrial centrifuge. The system is composed of screw rotor, bowl rotor, driving motors, gear box, and support rolling element bearings. These rotors have a rated speed of 4300 rpm, and were modeled utilizing a ...
A rotordynamic analysis was performed with a decant-type centrifuge, which is a kind of industrial centrifuge. The system is composed of screw rotor, bowl rotor, driving motors, gear box, and support rolling element bearings. These rotors have a rated speed of 4300 rpm, and were modeled utilizing a rotordynamic FE method for analysis, which was verified through 3-D FE analysis. Design goals are to achieve wide separation margins of lateral critical speeds, and favorable unbalance responses of the rotor in the operating range. Then, a complex analysis rotordynamic analysis of the system was carried out to evaluate its forward synchronous critical speeds and mode shapes, whirl natural frequencies, and unbalance responses under various balance grade. As a result of analysis, the rotordynamic analysis performed by separating a screw rotor and bowl rotor may cause an error in predicting critical speed of entire system. Therefore, the rotordynamic analysis of a coupled rotor combining a screw and bowl rotor must be performed in order to more accurately estimate dynamic characteristics of the decanter-type centrifuge as presented in this paper. Also, rolling element bearings with suitable stiffness should be selected to keep enough separation margin. In addition, in establishing balance grade of a screw and bowl rotor, ISO G2.5 balance grade is more recommended than ISO G6.3, in particular balancing correction of a screw rotor based on ISO G2.5 grade is strongly recommended.
A rotordynamic analysis was performed with a decant-type centrifuge, which is a kind of industrial centrifuge. The system is composed of screw rotor, bowl rotor, driving motors, gear box, and support rolling element bearings. These rotors have a rated speed of 4300 rpm, and were modeled utilizing a rotordynamic FE method for analysis, which was verified through 3-D FE analysis. Design goals are to achieve wide separation margins of lateral critical speeds, and favorable unbalance responses of the rotor in the operating range. Then, a complex analysis rotordynamic analysis of the system was carried out to evaluate its forward synchronous critical speeds and mode shapes, whirl natural frequencies, and unbalance responses under various balance grade. As a result of analysis, the rotordynamic analysis performed by separating a screw rotor and bowl rotor may cause an error in predicting critical speed of entire system. Therefore, the rotordynamic analysis of a coupled rotor combining a screw and bowl rotor must be performed in order to more accurately estimate dynamic characteristics of the decanter-type centrifuge as presented in this paper. Also, rolling element bearings with suitable stiffness should be selected to keep enough separation margin. In addition, in establishing balance grade of a screw and bowl rotor, ISO G2.5 balance grade is more recommended than ISO G6.3, in particular balancing correction of a screw rotor based on ISO G2.5 grade is strongly recommended.
Na, E. S., 2002, "Study on the Characteristics of Solid-liquid Separation from Swine Wastewater by Screw Decanter", Ph. D Dissertation, Chung Nam Natioal University
Leung, W. W.-F., Shapiro, A. H. and Yarnell, R., 1999, "Improvements in the Clarification of Finite-particles Slurries Using Decanter Centrifuges", Filtration & Separation, Vol. 36, No. 9, pp. 32-37
Leung, W. W.-F. and Shapiro, A. H., 1999, Dewatering of Finite-particles Slurries Using a Compound-beach Decanter with Cake-flow Control", Filtration & Separation, Vol. 36, No. 10, pp. 49-56
Bart, P. and Stefan, W., 2004, "Relationship between Pool Depth and Internal Washing on the Beach of a Solid Bowl Decanter Centrifuge", Filtration & Separation, Vol. 41, No. 6, pp. 36-40
Suh, Y. K., 2003, "Channel Design of Decanter-type Centrifuge(I)-Particle's Suspension and the Channel Size", J. of the Korean Society of Precision Engineering, Vol. 20, No. 10, pp. 148-155
Suh, Y. K., 2003, "Analysis of the Power for a Decanter-type Centrifuge(I)-Sludge Removal Power", J. of the Korean Society of Mechanical Engineering, Vol. 27, No. 7, pp. 929-937
Shin, C. H., Lee, D. C., Kim, W. H., Choi, T. J. and Chung, J. T., 2004, "A Study on the Failure Analysis and Performance Improvement of a Decanter", J. of the Korean Society of Mechanical Engineering, Vol. 28, No. 5, pp. 586-592
Han, G. J., Lee, S. W., Shim, J. J., et al., 2003, "Stress and Vibration Analysis with Respect to the Change of the Shape of Screw Blade and the Hole for Centrifuge", J. of the Korean Society of Mechanical Engineering, Vol. 20, No. 9, pp. 118-125
Kim, B. O., Lee, A. S. and Noh, M. K., 2007, "A Rotordynamics Analysis of High Efficiency and Hybrid Type Vacuum Pump", Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 17, No. 10, pp. 967-975
※ AI-Helper는 부적절한 답변을 할 수 있습니다.