Gantry Truss Crane Wheel

The core working process of the brake wheel of the drum brake of the gantry crane:
     Braking state (power-off/power off): The brake spring releases its elastic force, pushing the brake arms and brake pads on both sides to open outward, causing the friction lining to tightly adhere to the inner cylindrical surface of the brake wheel, generating friction torque to hinder the rotation of the brake wheel, thereby locking the crane mechanism (lifting/running/rotating), preventing heavy objects from sliding down or equipment from slipping.
     Release state (powered/supplied): An external power source (such as an electric hydraulic thruster motor running or air pressure entering) generates thrust, compresses the brake spring, and pulls the brake arm back, causing the brake pad to separate from the brake wheel to form a specified gap (usually 1.0-1.5mm). 

    The brake wheel rotates freely with the transmission shaft, and the equipment operates normally.
     Energy conversion: During the braking process, the surface of the brake wheel vigorously rubs against the friction lining, converting the kinetic energy of the motion mechanism into thermal energy for dissipation, forcing the brake wheel speed to decrease until it stops. ‌‌
Key structures and characteristics:
     Brake wheel role: Made of high-quality cast iron or steel, fixed on the transmission shaft and rotating synchronously with the shaft. Its inner cylindrical surface is a friction working surface, requiring high wear resistance, good heat dissipation, and thermal stability to prevent thermal degradation.
     Normally closed design: Following the safety principle of "braking upon power failure", it ensures that the crane automatically and safely stops in case of sudden situations such as power outages or malfunctions, eliminating the risk of heavy objects falling.
     Self increasing force effect: In some designs, the rotation direction of the brake wheel can be matched with the force direction of the brake shoe to produce a "leading shoe" self increasing force effect, improving braking efficiency, but strict control is required to prevent anti lock or shaking. ‌‌