Its friction coefficient of the viscous roller is similar to that of a real road surface. It can simulate the actual braking situation of the car. After the speed of the car is increased, it is braked to detect the braking force of the left and right wheels on the same car, and the car is evaluated by calculation. The braking performance gives the braking performance when the vehicle is braking and the vehicle stability data when braking. Counter-pressure drum brake test bench, the front wheel and the rear wheel of the car to be tested are respectively placed on two rollers. The two rollers rotate in the same direction under the driving of the motor and drive the wheels to rotate. At this time, the wheel rolling can be measured. resistance. When the brake pressure of the tested automobile is greater than one atmospheric pressure, the motor-driven wheels rotate at the equivalent vehicle speed, and the tested automobile adopts braking. At this time, the wheel gives the drum a force opposite to the driving direction of the drum, namely the braking force. This force causes the entire braking device to rotate with the drum as the axis and is balanced by the balancing device and is relatively stationary. The balance is hung on the test table base and The amount of change of the tension sensor on the free end of the drum gearbox is reflected, and this change quantity is converted into an analog electric signal and transmitted to the secondary instrument panel controlled by the single chip microcomputer. After conversion, the braking force value is displayed on the instrument panel panel. The working time of each brake is seconds. Once the wheel is fully locked, lift the brake pedal. Otherwise, the wheels of the car may be excessively worn. In the automatic automobile detection system, the secondary instrument panel outputs the braking force value at the same time, the microcontroller transmits the digital signal generated by the converter to the main control computer system. The main control microcomputer integrates it with the pre-measured front axle and rear axle axle weight values ​​into international.
Travelling Tower Crane:
Travelling Tower Crane's tower body is fixed on the walking base frame, which can run on the special track with good stability, can carry load, and high work efficiency, so it is widely used in construction and installation engineering.
Rail type tower crane can run along the track, working range is large, widely used, suitable for multi-storey building construction.
Main Types of Travelling Tower Crane:
Application Area:
Because the Travelling Tower Crane is equipped with walking devices, it is flexible and widely used in the construction site of road bridge with high mobility for lifting and installation.
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