1. Power take-off system
The domestic concrete mixer truck adopts chassis engine power taking mode. The function of the power take-off device is to take out the power of the engine through the full power driver, and drive the mixing drum through the hydraulic system. The mixing drum rotates in the positive direction during the feeding and transportation process, so as to facilitate the feeding and mixing of the concrete. It rotates in the reverse direction during the discharging, and cuts off the power connection with the engine after the end of the work.
2. Hydraulic system
The main function of the hydraulic system is to convert the power of the power take-off into hydraulic energy (displacement and pressure), and then output it to mechanical energy (speed and torque) through the motor, so as to provide power for the rotation of the mixing drum.
The output speed of the hydraulic motor is decelerated and then transmitted to the mixing drum.
4. Control mechanism
4.1 control the rotation direction of the mixing drum to make it rotate in the forward direction during the feeding and transportation, and rotate in the reverse direction during the discharging.
4.2 control the rotating speed of mixing drum.
5. Mixing system
The mixing device is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is the container of concrete. When it rotates, the concrete moves along the spiral direction of the blade, and is mixed and stirred in the process of continuous lifting and turning. In the process of feeding and transportation, the mixing drum rotates positively, the concrete moves inward along the blade, and when discharging, the mixing drum reverses, and the concrete is discharged outward along the blade. The blade is the core part of the mixing device, which will lead to uneven mixing of concrete if it is damaged or severely worn. In addition, if the blade angle is not designed properly, the concrete will be separated.
6. Cleaning system
The main function of the cleaning system is to clean the mixing drum, sometimes it is also used for dry material mixing drum during transportation. The cleaning system also cools the hydraulic system.
7. Cooling system
The heat dissipation system adopts high temperature circulating oil to the hydraulic pump, and the heat generated by the hydraulic motor in the working process is emitted through the radiator and fan, so as to avoid the damage and abnormal operation of the hydraulic system caused by high temperature.
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