The principle of air brake air brake for semi-trailer?
The semi-trailer custom manufacturer Xiaobian explains to you the general working principle of the brake brake system. It uses the non-rotating components connected to the body (or the frame) and the rotating elements connected to the wheels (or the drive shaft). Friction to prevent the tendency of the wheel to rotate or rotate.
There is a gap between the hoof drums, the wheels and the brake drum can be freely rotated to decelerate the car, and the brake pedal is pushed down by the push rod and the master cylinder, so that the master cylinder oil flows into the wheel cylinder under a certain pressure, and is pushed through the two-wheel cylinder piston. The brake shoe is rotated about the support pin, and the upper end is separated to both sides to be pressed against the inner circumferential surface of the brake drum by the friction plate. The non-rotating brake shoe generates a frictional moment to the rotating brake drum, thereby generating a brake.
Before the car starts, the joystick of the manual control valve should be pulled back to release the parking brake position, so that the compressed air is charged into the parking brake air chamber from the parking brake air reservoir, and the energy storage spring is compressed to make the parking brake The piston returns to the non-braking position, and the service brake piston is also returned to the position by the return spring.
At this point, the parking brake is released and the car can start. However, if the air pressure of the air reservoir does not reach the minimum safe value, it is impossible to compress the spring, so the car is not likely to start. This is the main use of the energy storage spring for parking brake. advantage.
When the driver manipulates the manual brake valve, the core tube acts as a spring against the steering cam. At this time, the intake valve is closed, the exhaust valve is opened, and the air outlet is open to the atmosphere through the core tube and the exhaust port, and the composite brake gas is simultaneously The energy storage brake chamber in the chamber is also open to the atmosphere via a quick release valve. The car is then in the parking brake state.
Driving on a rainy night, semi-trailer should pay attention to safety. Rainy days are also a high incidence of accidents. In heavy rainy days, heavy-duty semi-trailers must also pay attention to the skill. The water mist that is rolled up due to the rotation of the semi-trailer wheels will be very large, behind it or The side will make your front glass ambiguous, so in addition to the horn and flash, the state of the wiper should be in continuous operation. It is best to increase the first or second gear under normal conditions. Semi-trailer custom manufacturers introduce you:
1. Check the semi-trailer engine compartment oil, antifreeze, brake fluid, booster pump oil, tubing, bolt torque, etc.
2. When checking the tire pressure of the semi-trailer and the tire pattern is shallow, the adhesion performance during driving is reduced, and the tire is replaced if necessary;
3, the chassis focuses on checking the direction system, tubing, bolt torque, etc.;
