时间：2014-12-15 19:18　作者：admin　点击： 次

Commonly used brakes include external brake pad brakes, internal expansion shoe brakes, band brakes, disc brakes, and magnetic powder brakes.
Outer holding pad brake: simple and reliable structure, good heat dissipation.The tiles have sufficient and more uniform back distance, which is convenient to adjust the gap.For a straight brake arm, the braking torque has nothing to do with the steering, and the brake axle is not bent.However, the wrap angle and braking torque are small, the manufacturing is more complicated than the band brake, the lever system is complicated, and the overall size is large.Wide application, suitable for frequent work and large space occasions.
Inner-shoe brake, two built-in brake shoes squeeze the brake drum radially outwards to generate braking torque.Compact structure, good heat dissipation and easy sealing.It can be used in occasions where the installation space is limited, and is widely used in wheeled cranes and the wheels of various vehicles (such as automobiles, tractors, etc.).
Band brake: simple and compact structure, large wrap angle, large braking torque.The brake wheel shaft is subjected to greater bending force, and the specific pressure and wear of the brake band are uneven.The braking torque of simple and differential band brakes is related to the direction of rotation, which limits the scope of application and poor heat dissipation.It is suitable for large-scale and compact brakes, such as in mobile cranes.
Disc brakes use axial pressure to compress discs or conical friction surfaces to achieve braking.The brake wheel shaft is free from bending and has a compact structure.Compared with band brakes, the wear is even, and the braking torque has nothing to do with the direction of rotation. It is used to prevent dust and moisture and can be made into a closed form.The heat dissipation condition of the friction surface is inferior to the block type and the belt type, and the temperature is higher. It is suitable for applications where compactness is required, such as the wheels of vehicles and electric hoists.
Magnetic powder brakes mainly use the shear force generated when the magnetic powder is magnetized to brake.Small size, light weight, small excitation power and braking torque has nothing to do with the rotation speed of the rotating parts.Magnetic powder can cause wear of parts, and is suitable for automatic control and drive systems of various machines.