Browse > Article
http://dx.doi.org/10.7837/kosomes.2017.23.4.393

Transient Structural Analysis of Piston and Connecting Rods of Reciprocating Air Compressor Using FEM  

Pham, Minh-Ngoc (Graduate School, Department of Marine System Engineering, Mokpo National Maritime University)
Yang, Chang-Jo (Division of Marine Engineering, Mokpo National Maritime University)
Kim, Jun-Ho (Division of Mechatronics Engineering, Mokpo National Maritime University)
Kim, Bu-Gi (Division of Mechatronics Engineering, Mokpo National Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.4, 2017 , pp. 393-399 More about this Journal
Abstract
In a reciprocating compressor, the piston and connecting rod are important parts. Excess mechanical stress on these parts may cause damage, and broken parts are expensive and difficult to replace. Therefore, it is necessary to analyze the mechanical stress affecting durability and longevity. The main purpose of this study was to identify locations of maximum stress on pistons and connecting rods. Based on dynamic calculation of the working process of a specific air compressor, an analysis of piston and connecting rod performance has been completed. A three-dimensional model for the air compressor's pistons and connecting rods was built separately, and FEM analysis of these components was carried out using a numerical method. The pistons were loaded by pressure which was changed according to crankshaft angle without thermal boundary conditions. The simulation results were used to predict and estimate stress concentration as well as the value of this stress on pistons and connecting rods. The maximum equivalent stress calculated are over 190 MPa on pistons and 123 MPa on connecting rods at crank angle $135^{\circ}$ and $225^{\circ}$ but these are under tensile yield strength. Besides, the calculated safety factors of connecting rods and pistons is higher than 1. Moreover, the results obtained can be used to provide manufacturers with references to optimize the design of pistons and connecting rods for reciprocating compressors.
Keywords
Piston; Connecting rod; Mechanical stresses; Crank shaft angle; Reciprocating compressors;
Citations & Related Records
연도 인용수 순위
  • Reference
1 ANSYS(2016), Inc. ANSYS Mechanical ADPL Structural Analysis Guide.
2 Ilman, M. N. and R. A. Barizy(2015), Failure analysis and fatigue performance evaluation of a failed connecting rod of reciprocating air compressor Engineering Failure Analysis, pp. 142-149.
3 Lingaiah, K. and B. R. Narayana Iyengar(2006), Machine Design Data Handbook, Suma publishers.
4 Malhotra, D., A. Bansal and S. Chaudhry(2014), Thermo Mechanical Analysis and Weight Reduction of Air Compressor Piston using CATIA and ANSYS, International Journal of Engineering Research and Technology, Vol. 3, Issue 10, pp. 1178-1181.
5 Manjunatha, T. R., H. V. Byre Gowda and G. S. Prabhunandan(2013), Design and Static Structural Analysis of Cylinder and Piston of Two Stage Reciprocating Compressor Using ANSYS, International Journal of Innovative Research in Science Engineering and Technology, Vol. 2, Issue 12, pp. 7590-7596.
6 Shenoy, P. S. and A. Fatemi(2006), Dynamic analysis of loads and stresses in connecting rods, IMechE, pp. 615-624.
7 Hanlon, P. C.(2001), Compressor Handbook.