Browse > Article
http://dx.doi.org/10.11627/jkise.2018.41.3.186

Structural Safety of Nozzle Plate using Simulation  

Jung, Jong Yun (School of Industrial Engineering and Naval Architecture, Changwon National University)
Park, Heesung (School of Mechanical Engineering, Changwon National University)
Kim, Joon-Seob (JinyoungTBX)
Publication Information
Journal of Korean Society of Industrial and Systems Engineering / v.41, no.3, 2018 , pp. 186-193 More about this Journal
Abstract
Modern manufacturing industries is to produce both precise and robust mechanical parts without failure while they are in service. In order to prevent a part failure for its lifetime, a mechanical design for a part should be examined on a basis of mechanical simulation. A nozzle plate, being a key part in steam engines, changes flow directions of steam in a turbine used in power plant. This paper is to the design and test for part safety and durability. Currently, nozzle plates are fabricated by welding nozzles to their plates. Welding causes some defects on the used materials while they are being manufactured. Another major defect is un-even pitches between welded nozzles. Welding causes phase changes because of high melting temperature of metal. This leads to decay on the welding spots, which weakens their structural strength and then, may lead to early damages on mechanical structures. This research proposes assembly-typed nozzle plate without welding. From the beginning, nozzle and plate are designed for insertion-typed assembly. Nozzle head and foot are designed in accordance with the grooves on outer ring and inner ring of a plate to make mating surfaces. Then the nozzle plate should be proved for structural and fatigue safety before they are put in manufacturing. This research adopts commercial softwares for modeling and mechanical simulation. The test result shows that the design with smaller mating area and deeper insertion produces higher safety in terms of structure and durability. From the conclusion, this paper proposes the assembly-typed nozzle plate to replace the welding typed.
Keywords
Nozzle Plate; Structural Analysis; Fatigue Analysis;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Jung, J.Y., Park, H., and Kim, J.S., Structural Test and Analysis of Assembled Nozzle Plates, Proceedings of Asia Conference on Engineering and Information, 2018.
2 Budynas, R.G. and Nisbett, J.K., Mechanical Engineering Design : Mac Graw Hill, 9th Ed., 2013.
3 Choi, D.-H. and Lee, K.-H., Structural Analysis and Optimization of a Pedestal for Deck Crane, Journal of the Korean Society of Manufacturing Process Engineers, 2012, Vol. 11, No. 1, pp. 95-100.
4 Jeong, J., Kwon, S.J., Chu, B., and Park, J., Unified-type Design and Structural Analysis for Mecanum Wheel Performance Improvement, Journal of the Korean Society of Manufacturing Process Engineers, 2014, Vol. 13, No. 2, pp. 117-123.   DOI
5 Jung, W., Redesign a Component of Automotive Propeller Shaft to Improve Productivity, Journal of Society of Korea Industrial and Systems Engineering, 2009, Vol. 32, No. 1, pp. 157-163.
6 Lee, J.-H., Park, H. S., Jung, J. Y., Kim, J. S., Jung, Y. L., and Park, S. W., A Numerical Investigation on the Isentropic Efficiency of Steam Turbine Nozzle Stage with Varying Mass Flow Rate, Transactions of the Korean Society of Mechanical Engineers-B, 2017, Vol. 41, No. 10, pp. 685-691.
7 Lee, M.J. and Lee, C.M., A Study on Structural Analysis and Optimum Shape Design of Tilting Index Table, Journal of the Korean Society for Precision Engineering, 2010, Vol. 27, No. 2, pp. 86-93.
8 Lee, T.-H. and Choi, J.-W., Structural Analysis on Horizontal CNC Lathe, Journal of Korean Society of Manufacturing Technology Engineers, 2011, Vol. 20, Mo. 6, pp. 298-303.
9 Oh, M.-S., Nam, S.-H., and Lee, B.-G., Structure Analysis for Damper Stopper of Lock-up Clutch, Journal of the Korea Academia-Industrial Cooperation Society, 2014, Vol. 15, No. 4, pp. 1865-1870.   DOI
10 Park, H., Kim, J.-S., and Jung, J. Y., Improvement of A Structure and An Efficiency for Nozzle Plates, Proceedings of the 2017 Korea Society of Industrial and Systems Engineering, Fall, 2017.
11 Vanderplaats, G.N., Structural Design Optimization Status and Direction, Journal of Aircraft, 1999, Vol. 36, No. 1, pp. 11-20.   DOI
12 Zaeh, M. and Siedl, D., A New Method for Simulation of Machining Performance by Integrating Finite Element and Multi-Body Simulation for Machine Tools, Annals of the CIRP, 2007, Vol. 56, No. 1, pp. 383-386.   DOI