How are disc brakes different from drum brakes?

The braking system is directly responsible for road safety. Therefore, there is no discussion - it must be functional and work flawlessly. In modern cars, two types of brakes predominate - disc and drum, although the latter is becoming less common. It is worth knowing their structure and principles of operation, because in the event of a failure or problems, we will know what we are dealing with.

Drum brake system

Drum brake folds from a drum that rotates with the wheel... In the center of the drum, brake pads are installed on a non-rotating wheel disc. This disc is often mistakenly referred to as a brake disc, in which brake linings are located close to the working surface of the drum. Expanding with the brake piston jaws rub against the drum surface, slowing down. The spring or spring system that connects the jaws is responsible for retracting the jaws, which causes the braking to cease.

3 types of drum brake design

According to the design of brake pads and cylinders, the design of drum brakes can be divided into 3 types:

One-sided layout This is the simplest type of drum brake. It's built from one brake cylinder with two pistons that are designed to press against one end of the brake padsand the other end is fixed on fixed pins. In this construction jaws wear unevenlybecause first they brake the upper part and then the lower one. Additionalo other forces act on themwhich also affects their different consumption.

Two-level layout – this type of drum brake is already folded from two cylinders, but its pistons are single... One is at the bottom, the other is at the top, and both are responsible for putting pressure on one end of one jaw. The other end of the jaws is located along the entire pin. They are in a two-level layout. two parallel jaws with the same wear rate. The downside, however, is that the wear of the entire surface of each jaw is uneven.

Self-amplification scheme - the most popular and effective type of drum brake. Self-amplification scheme works the same as the Simplex chip – built with one brake cylinder and two pistons. The difference is that the jaws at the other end are not permanently attached to the pins, but floating and connected with a special connector. As a result, the parallel jaw pushes the oppositely rotating jaw away from itself during braking, thereby the sponges act on the work surface with almost the same force and wear evenly.

Drum brakes have many disadvantages. Basically youthis site does not cool well, which reduces efficiency, and its the weight is too heavy... Moreover, drum brakes do poorly distributed pressure on friction elementswhich makes the braking force less effective than disc brakes. Their handling them is much more difficult and they are more prone to contaminationas the rest of the dust settles in the drum.

Disc brake system

Disc brakes perform much better than drum brakes.... This is because they lighter, more visible and less prone to damageI. They better withstand heavy use, are resistant to overheating and are easy to maintain. However, disc brakes also have disadvantages - they require much more force to create a braking effect than drum brakes, so drums are much better suited as emergency brakes.

How does a disc brake work? The braking force is generated by mounted pistons that are integrated into the brake caliper., release or block the brake disc connected to the wheel with pads. Gotta move the pistons fluid pressure created in the master cylinder and transmitted through the lines.

Sometimes in the car There are fixed-caliper brakes in which pistons, housed in a symmetrical housing, compress the brake disc on both sides. More often used are floating caliper brakes, where the piston or brake pistons are located only on one side, but movable, the piston presses the inner block directly against the disc. At the same time, due to the forced movement of the caliper, the outer friction piece is also pressed against the disc, slowing down the rotation.

Disc brakes are used more often than drum brakes.... Mainly because they can withstand intense driving better, are lighter and more resistant to overheating, and are easier to repair. Are you looking for a brake disc for your car? Visit avtotachki.com - you will find it here discs from the best manufacturers such as Valeo... Come in and check. Be safe with NOCAR!

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