Freight train air brake modelling with emergency valves
The 120-type air brake system is unique around global rail industry and critical for Chinese freight train operation. Existing research about its simulations does not include detailed models for the emergency brake valves. This paper filled this research gap by developing a detailed fluid dynamic ai...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2024-04-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/16878132241242953 |
| _version_ | 1797220042834706432 |
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| author | Fan Jiang Kai Li Honghua Wu Shihui Luo |
| author_facet | Fan Jiang Kai Li Honghua Wu Shihui Luo |
| author_sort | Fan Jiang |
| collection | DOAJ |
| description | The 120-type air brake system is unique around global rail industry and critical for Chinese freight train operation. Existing research about its simulations does not include detailed models for the emergency brake valves. This paper filled this research gap by developing a detailed fluid dynamic air brake system with a focus on the emergency brake valve. The working principle of the emergency brake vale was reviewed. The brake system model was based on gas flow governing equations (mass and momentum) and orifice flow equations. The model was validated by comparing with measured data from a 150-wagon train. Four braking scenarios were compared. The simulated maximum cylinder pressure was only 5 kPa out of the range of the measured data. The maximum difference regarding the time when cylinder pressure reaches maximum pressure was 4 s. The simulation results have also shown variable switch pressure points for the two-stage brake valve. This is agreed by the measured results and was not shown in previously published research. |
| first_indexed | 2024-04-24T12:43:15Z |
| format | Article |
| id | doaj.art-0777c1081749420ca10d2161bb380351 |
| institution | Directory Open Access Journal |
| issn | 1687-8140 |
| language | English |
| last_indexed | 2024-04-24T12:43:15Z |
| publishDate | 2024-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-0777c1081749420ca10d2161bb3803512024-04-07T10:03:45ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402024-04-011610.1177/16878132241242953Freight train air brake modelling with emergency valvesFan Jiang0Kai Li1Honghua Wu2Shihui Luo3Zhuzhou CRRC Times Electric Co., Ltd., Zhuzhou, Hunan, ChinaZhuzhou CRRC Times Electric Co., Ltd., Zhuzhou, Hunan, ChinaState Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, Sichuan, ChinaState Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, Sichuan, ChinaThe 120-type air brake system is unique around global rail industry and critical for Chinese freight train operation. Existing research about its simulations does not include detailed models for the emergency brake valves. This paper filled this research gap by developing a detailed fluid dynamic air brake system with a focus on the emergency brake valve. The working principle of the emergency brake vale was reviewed. The brake system model was based on gas flow governing equations (mass and momentum) and orifice flow equations. The model was validated by comparing with measured data from a 150-wagon train. Four braking scenarios were compared. The simulated maximum cylinder pressure was only 5 kPa out of the range of the measured data. The maximum difference regarding the time when cylinder pressure reaches maximum pressure was 4 s. The simulation results have also shown variable switch pressure points for the two-stage brake valve. This is agreed by the measured results and was not shown in previously published research.https://doi.org/10.1177/16878132241242953 |
| spellingShingle | Fan Jiang Kai Li Honghua Wu Shihui Luo Freight train air brake modelling with emergency valves Advances in Mechanical Engineering |
| title | Freight train air brake modelling with emergency valves |
| title_full | Freight train air brake modelling with emergency valves |
| title_fullStr | Freight train air brake modelling with emergency valves |
| title_full_unstemmed | Freight train air brake modelling with emergency valves |
| title_short | Freight train air brake modelling with emergency valves |
| title_sort | freight train air brake modelling with emergency valves |
| url | https://doi.org/10.1177/16878132241242953 |
| work_keys_str_mv | AT fanjiang freighttrainairbrakemodellingwithemergencyvalves AT kaili freighttrainairbrakemodellingwithemergencyvalves AT honghuawu freighttrainairbrakemodellingwithemergencyvalves AT shihuiluo freighttrainairbrakemodellingwithemergencyvalves |