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Development and performance evaluation of traction system for steep gradient and sharp curve track

급구배 및 급곡선 궤도 추진시스템 개발 및 성능 평가

  • Seo, Sungil (New Transportation System Research Center, Korea Railroad Research Institute) ;
  • Mun, Hyung-Suk (New Transportation System Research Center, Korea Railroad Research Institute) ;
  • Moon, Ji-Ho (New Transportation System Research Center, Korea Railroad Research Institute) ;
  • Suk, Myung-Eun (New Transportation System Research Center, Korea Railroad Research Institute)
  • 서승일 (한국철도기술연구원 신교통연구본부) ;
  • 문형석 (한국철도기술연구원 신교통연구본부) ;
  • 문지호 (한국철도기술연구원 신교통연구본부) ;
  • 석명은 (한국철도기술연구원 신교통연구본부)
  • Received : 2016.07.05
  • Accepted : 2016.09.09
  • Published : 2016.09.30

Abstract

In this study, core technologies of a traction system on a mountain tram operating on the track of mountain road full of sharp curves and steep gradients were developed. In domestic mountain resort areas, sometimes the transportation service is not provided in winter because of ice and heavy snow on roads, so a mountain railway service independent of the climate and geographic conditions is needed. A traction system was designed taking into account of the power of a traction motor to climb the gradient of 120 ‰, which is common in domestic mountainous areas. and power transmission system was designed to consider the installation space for the traction system. In addition, a reduction gear and a propeller shaft were developed. An elastic pinion was developed and applied to the rack & pinion bogie system for steep gradient so that noise and vibration generated by contact between the steel gears could be reduced. Impact comparison tests showed that the vibration level of the elastic pinion is one-third lower than that of previous steel pinion. Independent rotating wheels and axles were developed for the bogie system to operate on the sharp curve of a 10 meter radius. In addition, the band braking system was developed to enhance the braking force during running on the steep gradient. A test for the braking force showed it exerts the required braking force. The performance of the developed core components were verified by the tests and finally they were applied to the bogie system running on the track of steep gradient and sharp curve.

본 연구에서는 급곡선과 급구배가 많은 산악 도로 상의 궤도에서 운행할 수 있는 산악트램의 추진시스템 핵심 기술을 개발하였다. 국내 산악 관광지는 겨울철 폭설과 결빙에 의해 교통이 통제되고 있어 지형 조건 뿐만 아니라 기후 조건에도 무관한 산악철도가 필요하다. 먼저, 일반적인 120‰ 구배 등반에 소요되는 견인전동기 출력을 고려하여 추진시스템을 설계하였으며, 추진장치 설치 공간을 고려하여 동력 전달 계통을 설계하고 감속기 및 동력 전달축을 개발하였다. 급구배 상승을 위해 필요한 랙앤피니언 추진장치의 강체 접촉에 의한 진동 소음을 줄이기 위해 탄성 피니언을 개발하여 적용하였으며, 충격 비교 시험을 통해 기존 강체 피니언에 비해 진동이 1/3이하로 감소됨을 확인하였다. 반경 10m의 급곡선을 운행할 수 있도록 개별 회전 차륜 차축을 개발하였다. 또한 급구배 주행중 제동력 향상을 위해 밴드 제동장치를 개발하였으며, 제동력 시험을 통해 요구 제동력을 발휘할 수 있음을 확인하였다. 개발된 주요 부품은 시험을 통해 성능을 검증하였고, 최종적으로 급구배 및 급곡선 운행 대차시스템에 적용된다.

Keywords

References

  1. N. P. Christos, Railway Transportation Systems, Design, Construction, Operation, CRC Press, pp. 237-250, 2016.
  2. S. I. Seo, J. G. Kim, H. S. Jung, A study on the applicability of newly developed stainless steel for weight reduction of carbody of intermodal tram, J. of the Korea Academia-Industrial cooperation Society, vol. 17, no. 3, pp. 457-463, 2016. DOI: http://dx.doi.org/10.5762/KAIS.2016.17.3.457
  3. S. I. Seo, et al., "State-of-arts of technologies on mountain railway and proposal of concept design of mountain tram", Railway J., The Korean Society for Railway, vol. 15, no. 6, pp. 53-58, 2012.
  4. M. H. Hwang, K. M. Yun, S. C. Kim, N. H. Lim, A study on the optimized cross-section of embedded rail system, J. of the Korea Academia-Industrial cooperation Society, vol. 15, no. 4, pp. 2511-2518, 2014. DOI: http://dx.doi.org/10.5762/KAIS.2014.15.4.2511
  5. MOLT, Technical Specifications for Urban Railway Vehicles, Enforcement 2014-434, KRTS-VE-Part51, Ministry of Land and Transport, pp. 37-50, 2014.
  6. S. H. Kim, Introduction of railway system, Jajak Academy, pp. 100-120, 2007.
  7. S. I. Seo, H. S. Mun, "Development of a low vibration rack&pinion traction system for more comfortable cabin on mountain tram", J. of Korean Society of Hazard Mitigation, vol. 15, no. 3, pp. 23-26, 2015. DOI: http://dx.doi.org/10.9798/KOSHAM.2015.15.3.23
  8. S. M. Jung, D. C. Han, Standard machine design, Dongmyungsa, pp. 691-695, 1983.