The key technologies and maintenance system
Gan Dunwen Associate Researcher
China Academy of Railway Sciences
中国高速铁路网规划
China high speed railway development planning
¾ Speed upgrade on existing railways: 200 ~ 250km/h,
8000 km
¾ 41 Passenger Dedicated
Lines by 2012, more than 13000 km;
¾ 16000km by 2020
CRH R&D System
CRH R&D System
Contents
Key technologies for High Speed Trains
HSTs Maintenance System in China
Challenges to CRH
Key technologies for HSTs
Key technologies --
System Integration
Key technologies --
System Integration
HSTs’ systems integrators – CSR & CNR
A high level of technology platform and R&D team of innovation
The world first-class bogie, car body, assembly, debugging production lines
Bogies Lines
Car-body Lines
Assembly Lines
Debugging Lines
• new-built 300 EMUs /year
• overhaul 200 EMUs/year
The whole manufacturing process technology design, craft standard system
Continuous improvement technology innovation system
Key technologies --
Bogies
Structure function
• Running Machinery
•The core of HSTs
• Loading, directing, suspension, traction and braking etc.
Keys
• Anti-roll movement
• Derailment safety
• Structural strength and reliability
Key technologies --
Bogies
Yaw damper
Nonlinear critical speed >550 km/h
• Improving box positioning stiffness according to line
Postioning Stiffness
conditions
• Selecting yaw damper parameters, and ensuring redundancy
• Determining the maintenance cycle to ensure a good equivalent
equivalent conicity
conicity
Wheel/rail surface
Matching
Key technologies --
Bodies
Structure characteristics
• Thin-walled cylindrical aluminum alloy welding structure • Drum wide body (3.3m), Large sections(11.2m2)
• Thin (1.5mm) and long (25m) profiles
• Overall carrying, hanging equipment to the base plate Keys z Structure strength z Modal designing z Vibration and noise reducing z drag reducing
气动
作用
Key technologies --
Bodies
Aluminum alloy