소형 수문 권양기용 피니언의 강도설계
Abstract
This paper presents an approach for the strength design of the pin jack-type gear system, that is, roller rack pinion (RRP) system, typically employed in small to mid-sized sluice gate devices. First, the load distribution of the pinion in the section of double tooth contact (DTC) was presented by the introduction of the load sharing factor considering the gear precision. Notably, the higher the gear precision, the lower was the contact force, contact stress, and tooth root bending stress (TRBS) in the section of DTC. Meanwhile, as the mounting distance (MD) increased, the pressure angle and geometry factor for the TRBS increased, and the tooth equivalent curvature decreased. Consequently, the change in contact force according to the increase of the MD was insignificant. However, the contact stress and TRBS significantly decreased, and the fatigue lifetime of the pinion increased.
Keywords:
RRP (roller rack pinion) system, Load sharing factor, Gear accuracy grade, MD (mounting distance), Hertz contact stress, TRBS (tooth root bending stress)Acknowledgments
본 연구는 2022년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업의 결과입니다.(2021RIS-003)
References
-
Kado, H., Kohata, K., 2001, Gating Devices Using Pin Rack Structures in Gate Mechanisms for Sluices, Proceeding of MPT2001-Fukuoka The JSME International Conference on Motion and Power Transmissions, 873-875.
[https://doi.org/10.1299/jsmeimpt.II.01.202.873]
-
Nagamura, K., Ikejo, K., Tanaka, E., Yamamoto, K., 2006, Strength of Pin-Rack Gear Mechanism, The Proceedings of the Machine Design and Tribology Division Meeting in JSME, 221-224.
[https://doi.org/10.1299/jsmemdt.2006.6.221]
-
Ikejo, K., Nagamura, K., Tanaka, E., Yamamoto, K., 2009, Driving Performance and Strength of Pin-Rack Gear Mechanism Using a Trochoid Tooth Profile, ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, DETC2007-34243 1061-1069.
[https://doi.org/10.1115/DETC2007-34243]
- Kwon, S. M., Kim, C. H., Nam, H., 2010, Roller_Rack_V1, Korea Copyright Commission, S-2010-008347.
-
Kwon, S. M., 2017, Contact Fatigue Life of Rack-Pinion for Small-Sized Sluice Gate, J. Korean Soc. Manuf. Technol. Eng., 26:3 299-305.
[https://doi.org/10.7735/ksmte.2017.26.3.299]
-
Vullo, V., 2020, Gears - Volume 2: Analysis of Load Carrying Capacity and Strength Design, Springer Nature Switzerland AG, Switzerland.
[https://doi.org/10.1007/978-3-030-38632-0]
-
Sanchez, M. B., Pedrero, J. I., Pleguezuelos, M., 2013, Critical Stress and Load Conditions for Bending Calculations of Involute Spur and Helical Gears, Int. J. Fatigue., 48 28-38.
[https://doi.org/10.1016/j.ijfatigue.2012.11.015]
-
Spitas, V., Papadopoulos, G. A., Spitas, C., Costopoulos, T., 2011, Experimental Investigation of Load Sharing in Multiple Gear Tooth Contact Using the Stress-Optical Method of Caustics, Strain, 47:s1 e227-e233.
[https://doi.org/10.1111/j.1475-1305.2008.00558.x]
-
Pedrero, J. I., Pleguezuelos, M., Artés, M., Antona, J. A., 2010, Load Distribution Model Along the Line of Contact for Involute External Gears, Mech. Mach. Theory., 45:5 780-794.
[https://doi.org/10.1016/j.mechmachtheory.2009.12.009]
- American National Standard, 2004, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth, ANSI/AGMA 2001-D04, American Gear Manufacturers Association, VA, U.S.A..
- Budynas, R. G., Nisbett, J. K., 2015, Shigley’s Mechanical Engineering Design 10th edition, McGraw-Hill, NY, U.S.A..
-
Wang, Y., Ji, D., Zhan, K., 2013, Modified Sprocket Tooth Profile of Roller Chain Drives, Mech. Mach. Theory., 70 380-393.
[https://doi.org/10.1016/j.mechmachtheory.2013.08.006]
-
Kwon, S. M., Cha, D. I., 2018, Tooth Root Bending Stress of Roller-Rack and Pinion System, J. Korean Soc. Manuf. Technol. Eng., 27:6 492-498.
[https://doi.org/10.7735/ksmte.2018.27.6.492]
- ISO, 2006, Calculation of Load Capacity Spur and Helical Gears – Calculation of Tooth Bending Strength, ISO 6336 – 3:2006, International Organization for Standardization, Geneva, Switzerland.
Professor in the School of Mechanical Engineering, Changwon National University. His research interests are pin gearing and speed reducer.
E-mail: smkwon@changwon.ac.kr
M.Sc. candidate in the Department of Mechanical Design and Manufacturing Engineering, Changwon National University. His research interest is pin gear drive unit.
E-mail: chaid7@naver.com
Ph.D. student in the Department of Mechanical Design and Manufacturing Engineering, Changwon National University. His research interest is pin gear drive unit.
E-mail: yonghowave@gmail.com