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Performance Characteristics And Operating Principle Of Disc Brake
Jul 05, 2017

            The rotating element in the friction pair of disc brake is a metal disc working on the end face, called the brake disc. The friction element is clamped on both sides to create a brake. The fixed element has many kinds of structural forms, the disc brake can be divided into two types: Clamp disc type and overall type.

            Compared with drum brakes, disc brakes work on the surface of the plane and both sides of the heat transfer, circle-circling easy to cool, not easy to occur large deformation, braking efficiency is more stable, after prolonged use of the brake disc due to high temperature expansion to enhance the braking effect, and drum brake single-sided heat transfer, both inside and outside the large temperature difference, resulting in easy deformation of the brake drum, at the same time after a long time braking, brake drum due to In addition, the disc brake structure is simple, easy to maintain, easy to achieve the braking clearance automatic adjustment.Disc Brake

            The disadvantage of disc brakes is that the friction plate is directly acting on the disk without the automatic friction force, brake performance is low, so used in the hydraulic braking system if the required braking to promote the pipeline pressure is higher, it is necessary to install additional power auxiliary devices; while used for parking brake, the installed parking brake gear is more complicated than drum brakes, so the application in the rear wheel is limited.Disc Brake

             When braking, the oil is pressed into the inner and outer two-wheel cylinder, and its piston presses the brake disc under the action of hydraulic pressure, which produces friction moment and braking. At this time, the edge of the rectangular rubber seal ring in the cylinder groove produces the micro-elastic deformation under the action of the piston friction. When relaxing braking, the pistons and brake blocks rely on the elasticity of the seal ring and the spring's elastic return position. Because the rectangular seal ring edge deformation is very small, in the absence of braking, friction between the disc and the gap between the disk is only 0. Around 1mm, it is enough to guarantee the lifting of the brake. Due to the expansion of the brake disc, its thickness only traces of change, it will not occur "delay" phenomenon. The rectangular rubber seal ring plays the role of the piston back position and the automatic adjustment clearance in addition to the sealing function. If the brake block friction plate and disk gap wear increased, the brake when the seal ring deformation to reach the limit, the piston can still continue to move until the friction plate pressed to tighten the brake disc. After lifting the brake, the rectangular rubber seal ring will push the piston back to the same distance as before wear, still maintain the standard value.Disc Brake