CQPD25.4B Model Pneumatic Disc Braking Mechanism

Working Principle

• When the braking command is given, the directional control valve is activated, allowing compressed air to enter the appropriate chamber of the pneumatic cylinder. The pressure of the compressed air causes the piston to move, which in turn moves the piston rod. The piston rod is connected to the caliper assembly of the disc brake. As the piston rod moves, it causes the caliper to apply pressure to the brake pads, forcing them against the rotating brake disc. The friction between the brake pads and the disc generates a braking torque, which slows down or stops the rotation of the shaft.
• When the braking command is removed, the directional control valve changes its position, allowing the compressed air in the cylinder to vent to the atmosphere. A spring (either internal or external to the cylinder) then returns the piston to its original position, releasing the pressure on the brake pads and allowing the disc to rotate freely again.

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