Electromagnetic brakes slow down or stop a moving machine by using an electromagnetic force to apply friction to its wheels. These brakes receive the electromagnetic force they require from a magnetic field comprised of a magnetic coil and a coil shell that is bolted to the machine frame.Know More
A typical electromagnetic brake has three elements in its construction – a magnetic field comprising of a coil and a shell, an armature and the hub. When the brakes are applied, the armature is attracted to the magnetic field developed by the coil.
Simultaneously, a torque working in the opposite direction is transferred into the field to counteract the effect of the magnetic field. As the strength of the field falls, the vehicle begins to slow down and eventually stops. The disengagement process begins as soon as the vehicle stops. As the magnetic flux degrades rapidly, the armature is brought to its initial position ready to work again. This process is quite rapid and usually takes less than three seconds to complete. The smooth working of the coil is crucial to the effective functioning of the electromagnetic brake as it produces the magnetic field. The whole assembly has to be protected against extremes of temperature as well as wear and tear, as both these factors are detrimental to the functioning of the brakes.
Electromagnetic brakes are now used in airplane braking systems in addition to extensive use in train and tram braking systems.Learn more about Brakes
A disc brake uses a set of calipers to press braking pads against a disc attached to the wheel. The friction from this contact slows the wheel and, by extension, slows the vehicle. Most cars have disc brakes attached to the front wheels and older drum brakes on the rear, while some have disc brakes on all four wheels for maximum control.Full Answer >
Brake pads last anywhere from 30,000 to 70,000 miles, and brake rotors can last about three times longer. The exact mileage depends on the type and composition of the pad's friction material, the owner's driving habits and driving conditions.Full Answer >
Gravity bleeding brakes involves attaching clear tubing to the vehicle's bleeders and manipulating the tubing to release trapped air bubbles in the braking system. The required supplies are an automotive jack, four jack stands, 1 quart of brake fluid, 5 feet of 3/16-inch tubing, an empty quart jar, a hammer, masking tape, vise grip pliers and an open-end wrench. This procedure takes about 30 minutes.Full Answer >
Air-over-hydraulic brake systems operate using a combination of compressed air and hydraulic pressure, and the release of the air and hydraulic pressure engages the master cylinder. It then applies pressure to the valves, and the brake fluid is released. The brakes then exert friction on the tires, which stops them.Full Answer >