In the design of the Scheffel bogie, based on the principles of the traditional "three-piece" bogie, it connects the left and right bearing saddles of a wheel pair to form a U-shaped subframe. This structure allows the front and rear wheel pairs to be pinned together with the two U-shaped subframes via diagonal rods, forming an autonomous steering mechanism. This innovative design not only enhances the stability of snake motion but also improves the train's ability to pass curves, effectively resolving the conflict between running stability and curve in traditional bogies.
Compared to conventional "three-piece" bogies, the Scheffel bogie has the following advantages:
1. Improved Operational Quality: The new structure provides smoother bogie operation, enhancing overall ride comfort.
2. Higher Operational Speeds: The improved design allows trains to operate at higher speeds while maintaining stability.
3. Enhanced System Stability: The autonomous steering mechanism increases the overall stability of the system, reducing vibrations and deviations during travel.
4. Reduced Wear between Wheel Flanges and Rails: More precise steering reduces friction between wheel flanges and rails, extending their service life.
5. Lower Construction Costs for New Rail Lines: Improved bogie negotiation capabilities reduce the requirements for track precision, thereby lowering construction costs.
6. Increased Transport Efficiency: Higher speeds and better stability directly enhance transport efficiency.
7. Lower Maintenance Costs for Wheels and Rails: Reduced wear decreases maintenance needs, lowering long-term maintenance costs.
8. Reduced Energy Consumption and Noise: Optimized design reduces energy loss and operational noise, minimizing environmental impact.
9. Reduced Derailment Incidents: Enhanced stability and steering capabilities significantly lower the risk of derailment.
Main technical parameters of Scheffel bogie
Gauge(mm) | 1067 | Side bearing center distance (mm) | 1130 |
Wheelbase(mm) | 1753 | Axle load (t) | 14/20 |
Wheel diameter (mm) | 860 | Self-weight ( t ) | Approximately 4.0 |
Disc Diameter（mm） | 396 | Maximum operating speed( km/h) | 100 |
Through the minimum curve radius (m) | 100 | Braking magnification of basic braking system | 5 |
