Can a bogie shorten the fixed wheelbase and what is a bogie wheelbase?

Of course, it can, depending on whether the mechanical structure allows it, and the suspension parameters may need to be optimized and modified. In general, shortening the wheelbase will reduce the speed on the street. This needs to be compensated for by adjusting the elaboration. Of course, if the change is small (into 50mm), it can be ignored.

The minimum passing curve radius of the rolling stock is written into the design specification, at 5km h, the locomotive is 145m (DF7D and shunting machine have actually reached 100m, and several have reached 80m), the passenger car is 145m, and the single car is 100m; Trucks (special trucks, except for D trucks) are 80m for single vehicles and 145m for continuous hanging.

Depending on whether the mechanical structure allows it, the suspension parameters may need to be optimized and modified. In general, shortening the wheelbase will reduce the speed on the street. This needs to be compensated for by adjusting the elaboration.

Of course, if the change is small (into 50mm), it can be ignored.

Precautions: 1. Air springs with low lateral stiffness: air springs with low lateral stiffness are used to improve vehicle riding comfort.

2. Axle box rubber spring with low lateral stiffness Due to the use of axle box rubber spring with low lateral stiffness, the lateral force when the vehicle passes through the curve is reduced, thereby improving the running performance of the vehicle on the curve.

3. Pillow-free car body support mode and rubber spring axle box positioning These measures eliminate the bolster and friction parts, simplify the bogie structure and reduce the number of parts. This helps to simplify maintenance and reduce maintenance costs.

The bogie wheelbase is the distance between the axle centerlines at both ends of a bogie.

Bogie wheelbase: The distance between the centerline of the axle in the front position and the last position of the same bogie.

The center spacing of the bogie can be called the fixed distance of the car stove judgment cover, which refers to the distance between the front and rear running parts of the car body, if it is a vehicle with a bogie, except for the big car, it is mostly within 18000.

The role of the bogie:

1. Traction function. Under a given adhesive weight, the locomotive bogie should be able to transmit the circular traction generated by the hidden contact between the wheel and the rail to the frame and coupler, and pull the train behind it forward.

2. Supporting and transmitting functions. The bogie does not make a single and bears the weight of the locomotive frame and above in the vertical direction.

3. Straight line and curve guiding function. For locomotives running on tracks, the driver cannot control the change in the direction of its running, but relies on the automatic guidance function of the locomotive running part itself.

The center spacing of the bogie can be called the vehicle distance, which refers to the distance between the front and rear running parts of the car body, if it is a vehicle with a bogie, except for the large car Zhaoqiao, it is mostly within 18000.

The role of the bogie:

1. Traction function. Under a given adhesive weight, the locomotive bogie should be able to transfer the wheel traction generated at the contact of the wheel-rail connector to the frame and coupler, and pull the train behind it forward.

2. Supporting and transmitting functions. The bogie not only bears the weight of the locomotive frame and above in the vertical direction.

3. Straight line and curve guiding function. The driver cannot control the change in the direction of the locomotive running on the track, but relies on the automatic guidance function of the locomotive running part itself.

The center spacing of the bogie can be called the vehicle distance, which refers to the distance between the front and rear running parts of the car body, if it is a vehicle with a bogie, except for the large car, it is mostly within 18000.

The role of the bogie:

1. Traction function. Under the given sticky weight, the locomotive bogie should be able to transfer the traction around the wheel generated at the contact between the wheel and the rail to the frame and coupler, and pull the train behind it forward.

2. Supporting and transmitting functions. The bogie not only bears the weight of the locomotive frame and above in the vertical direction.

3. Straight line and curve guiding function. For a locomotive running on the track, the driver cannot control the change in the direction of its operation, but relies on the automatic guidance function of the locomotive itself.