The last part of the brake system is the brake disc. Th […]
The last part of the brake system is the brake disc. The old-fashioned hub brake has been slowly eliminated. Because he does not dissipate heat well, the grinding debris can not be eliminated. There are many drawbacks. Now it is only in a cheap car. Can be seen, is a form that is slowly being eliminated, and now the common one is the disc brake, which is the brake disc.
Disc brakes have been widely used in cars, and mid- to high-end cars are used for all wheels. As mentioned earlier, low-end car rear brakes are cost-effective and use hub brakes. The disc brake, also known as the disc brake, is the brake disc. It is hydraulically controlled. The main components are fixed on the floor of the brake disc, sub-pump and brake. The two friction discs on the brake caliper are pressed. The friction plate brakes and acts like a pliers to clamp the rotating plate and force it to stop.
The disc brake has fast heat dissipation, light weight, simple structure and convenient adjustment. Especially when the load is high, the high temperature resistance is good, the braking effect is stable, and it is not afraid of muddy water attack. In winter and bad road conditions, the disc brake is easier to stop in a shorter time than the hub brake. Disc brakes used in many cars include flat brake discs, perforated brake discs, and scribing discs, among which the scribing discs have better braking and ventilation.
The performance of the disc brake is less affected by the friction coefficient, and the performance is more stable. After the immersion, the efficiency is reduced less, and it only needs to be braked once or twice to return to normal. When the output braking torque is the same, the size and weight are generally better. Small; the brake disc has a very small amount of thermal expansion along the thickness direction, which does not cause the brake gap to increase significantly as the thermal expansion of the brake hub causes the brake pedal stroke to be too large; it is easier to achieve automatic gap adjustment, and other maintenance and repair operations are also relatively small. Simple.
Because the size of the brake friction pad is not long, the working surface area is only 6%-12% of the brake disk area, so the heat dissipation is good.
Because the brake pad has a high unit pressure on the disc, it is easy to squeeze out the water, and at the same time, it is easy to dry after being wetted by the centrifugal force, and the wiping effect of the pad on the disc, so that only after the water is discharged One or two brakes can return to normal; the hub brakes require more than ten brakes to restore normal braking performance.