The brake chamber is one of the core components of the commercial vehicle braking system, and its working principle is based on the basic principles of aerodynamics.
Structure and composition:
The brake chamber is mainly composed of key components such as air chamber, piston, push rod, spring and sealing device. An air chamber is an enclosed space used to store and compress air. The piston is the movable part in the air chamber and is connected to the push rod. One end of the push rod is connected to the piston, while the other end is connected to the brake drum or disc.
Initial state:
When the vehicle is running normally, the brake chamber is in its initial state. At this time, the air in the air chamber is at normal pressure, the piston and push rod remain relatively stationary, and the spring remains in a relaxed state. The braking system does not receive any activation signal and the vehicle is running freely.
Brake signal activated:
When the driver applies braking force via the brake pedal, the pressure inside the brake system's chamber increases. This signal activates the brake chamber, causing the pressure of the air in the chamber to increase. As the pressure in the chamber increases, the piston is pushed and begins to move.
Piston movement:
The movement of the piston is a key step in the work of the brake chamber. As the pressure inside the chamber increases, the piston pushes outward, pushing the push rod attached to it. The movement of the push rod is transmitted by the piston to the brake drum or disc, thereby generating braking force. During this process, the compressed air in the air chamber acts as a medium for transmitting braking force.
The braking effect produces:
The movement of the push rod transfers braking force to the brake drum or disc, causing friction. The brake drum is usually located inside the wheel, while the brake disc is attached to the wheel. Under the action of braking force, the brake drum or brake disc begins to be compressed by the brake lining, causing friction. This friction converts braking force into heat energy, causing the relative movement of the brake drum or disc and wheel to slow down, slowing the vehicle down.
Brake release:
Once the driver releases the brake pedal, the pressure in the cylinder decreases and the piston and push rod return to their original position. This reduces the friction between the brake drum or brake disc and the wheel, and the braking effect disappears. The vehicle returns to free driving and the brake chamber is ready to respond to the brake signal again.
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