Pneumatic brakes are referred to as disc brakes, pneumatic brakes, air-pressure disc brakes, and air-pressure hydraulic brakes. They are one of the industrial transmission brakes. They use air pressure to stop or slow down the moving parts in the machine. operating units. The utility model has the advantages of simple structure, convenient installation, no damage, anti-pressure, anti-fall and anti-knocking, long service life, generally only need to replace the brake pad, the replacement is easy and convenient, and the magnetite effect is adopted.
The working principle of the pneumatic brake is to push the piston into the linear motion by inputting the pressurized gas into the air bag of the pneumatic brake, and the friction block that lowers the brake presses the brake wheel to generate the friction and brake function. The pneumatic brake is connected by air pressure, and is released by the return spring. The disc slides along the axial direction by the air pressure to contact the friction plate. A disc, a friction plate, and the like are assembled to the hub to form an integrated structure. The friction plate can be disassembled by unscrewing the adjusting nut, and the exchange is simple. Pneumatic brakes are mounted on the shaft with conical bushings with wedges and have a friction plate that can be exchanged while maintaining the mechanical equipment. The heat generated by the friction is radiated by the cooling fins mounted on the disc with the hub. The friction plate is a double-cut split type, and the friction plate can be exchanged by taking out the countersunk screw with a screwdriver through the hole with the hub disk.
Pneumatic brake has the characteristics of simple structure, stable operation, convenient installation, no noise, good linearity, no no-load torque, fast heat dissipation, light weight, convenient adjustment and high temperature resistance during high load. Pneumatic brakes It is also widely used in various industrial machinery transmission systems, which can play the role of cutting, combining, inching, reversing and shifting. Pneumatic brakes typically use a DC24V voltage. Voltage fluctuations must not exceed 5% of rated voltage and the friction surface should not be contaminated with any oil and any debris that can affect the normal operation of the disc brakes. In the case of air-pressure disc brake installation, the axial position should be adjusted. The air gap should be adjusted to the specified value and the coaxial shaft installation should be kept within the range of not more than 0.1 mm in order to maintain the normal operation and characteristics of the pneumatic brake.
Pneumatic brake use precautions
1. A safety cover or other safety measures with good ventilation.
2. The pneumatic brake must be used within the range of allowable joint and brake workload. If it is used beyond the allowable connection brake work during operation, it will cause heat to increase, and the friction surface will turn red and heat. If it is too hot, it may cause fire. In addition, it will directly affect the performance of the pneumatic brake, so be sure to use it in the brake work that allows the connection.
3. Do not increase the number of revolutions without exceeding the allowable number of rotations.
When the number of rotations exceeds the allowable number of rotations, the vibration becomes large, and depending on the occasion, damage or scattering may occur in a very dangerous state. Be sure to use the number of rotations and set the protective cover.
4. The friction plate used should not be stained with water or grease, otherwise it will affect the torque or work performance.
5. Before installing the pneumatic brake, confirm the surrounding environment. If there is moisture, oil, dust or vibration and impact, high humidity environment will directly affect the service life and performance of the pneumatic device.
6. Assembling the position of the brake, use the braking force and the driving force to balance the shaft as much as possible.
7. The air pressure pneumatic brake port should be located above the brake body to facilitate the discharge of air.
8. The position of the supercharger and the oil pressure source should be higher than the brake, and the closer to the brake, the better.
9. The brake disc should be installed at the center of the brake chuck. The deviation should be less than 0.2mm. The amplitude of the brake disc should be controlled within 0.1mm.
10. Before using the air pressure pneumatic brake, the air in the brake body should be completely discharged, the exhaust port bolts should be loosened, and the transparent rubber hose should be put on.