Papers by Keyword: Brake Shoe

Abstract: The foundation brake rigging is an important part of the railway freight cars, as it is an actuator of the rolling stock for deceleration and stop to ensure essential device for running safety. The mechanism clearance of the foundation brake rigging has a great influence on the brake shoe eccentric wear in the braking and releasing process. Especially during the braking process, the contact area between the brake shoe and the wheel tread is very small, resulting in the contact area with high stress. Actual operation manifests that on the upper side of the brake shoe wear severely. In order to build and analyze the model of the mechanism with clearance, the foundation brake rigging for the rigid-flexible coupling and multi-body dynamics simulation is carried out with the RecurDyn software, which provides the flexible body analysis module-FFlex. The method of resolving the problem is proposed, which includes the original model format conversion, the model preprocessing, constructing the rigid-flexible coupling dynamics model and analyzing the simulation results, and then providing the theoretical and technical support to improve the foundation brake system for railway freight cars by analyzing the main factors of influencing brake shoe eccentric wear.

Abstract: The research is presented a kind of cooling device for a vehicles brake cooling system, which comprises a thermoelectric cooling (TEC) chip and a heat exchange system. The disc-brake and drum-brake systems are discussed in the research. After inputting electric power, the TEC chip provides one cooling surface which is stick on the brake system and absorbs the heat from the brake pads or shoes. The other surface releases heat which is absorbed by a recycle water-cooling system to discharge the heat by water-cooled radiator to the surrounding. It decreased the working temperature of the brake system about 30% at most after using this cooling device and increased the braking force about 30% at least. There is a temperature control device for the device which can start the TEC chip when the temperature of the brake pads or shoes exceeded 50, which is the lowest temperature that the brake pads or shoes can maintain the most performance of the braking force. The device can efficiently keep the braking force when the driver uses the brake to reduce the vehicles speed for a long time and provide the safety for the driver.