Rail Shoulder size and shape affect performance

Width: The width of the rail shoulder directly affects the contact area between the wheel and the rail. A wider shoulder can provide a larger contact area, thereby spreading the vertical load of the wheel on the rail, reducing the pressure per unit area, helping to reduce wear and extend service life. However, too wide rail shoulders may also increase the friction resistance between the wheel and the rail, affecting the efficiency of the train.
Height: The height of the rail shoulder determines the position of the contact point between the wheel and the rail. The proper height ensures good contact between the wheel and the rail while providing adequate guidance. If the rail shoulder height is insufficient, it may cause the contact point between the wheel and the rail to deviate from the ideal position, affecting the stability and safety of the train.

Profile: The profile design of the rail shoulder is crucial to the steering and stability of the wheel. The ideal contour shape should ensure that the wheel remains on the center line of the track during driving, reducing lateral offset and shaking. In addition, the design of the contour should also take into account the wear of the wheel to ensure that good contact and guidance can still be maintained during long-term use.
Tilt Angle: The tilt Angle of the rail shoulder also has an effect on the rolling resistance and steering performance of the wheel. The proper tilt Angle can reduce the friction resistance between the wheel and the rail and improve the running efficiency of the train. At the same time, the tilt Angle can also help the wheels better fit the track curve when turning, improving the stability and safety of the train.

The size and shape of the shoulder not only affect the performance individually, but also interact with each other. For example, a wider shoulder may require a more suitable profile and tilt Angle to ensure good contact and guidance. Therefore, when designing and manufacturing the rail, it is necessary to consider the size, shape and coordination relationship with other components of the rail shoulder to ensure that its overall performance reaches the best state.