Structural Principle Of Cement Mixer Truck
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Structural principle of concrete mixer truck: Concrete mixer truck consists of automobile chassis and special equipment for concrete mixing and transportation. The chassis of concrete mixer trucks produced in my country mostly adopts the second-class general chassis provided by the vehicle manufacturer. Its special mechanism mainly includes power take-off, front and rear brackets of mixing drum, reducer, hydraulic system, mixing drum, operating mechanism, cleaning system, etc. The working principle is to take out the power of the automobile chassis through the power take-off device, and drive the variable pump of the hydraulic system to convert mechanical energy into hydraulic energy and transmit it to the quantitative motor, and the motor drives the reducer, which drives the mixing device to mix the concrete. There is also a new type of mixer truck produced by Yantai Shenglida, which adopts a rotary seal patent, which can make the mixing drum of the mixer truck and the inlet and outlet fully closed, and solves the series of problems of water evaporation, mortar stratification, concrete material scattering and driving safety of traditional products in a targeted manner, greatly improving the quality of concrete and construction safety, and the effective volume of the mixing drum is increased to more than 80%, and the comprehensive performance of the whole vehicle has reached a new height. The fully enclosed mixer truck has begun to serve the Qingyan Weirong high-speed railway and high-quality construction projects.
1. Power take-off device
The domestic concrete mixer truck adopts the main vehicle engine power take-off method. The function of the power take-off device is to take out the engine power by operating the power take-off switch, and drive the mixing drum through the hydraulic system. The mixing drum rotates forward during the feeding and transportation process to facilitate feeding and mixing of concrete, and rotates in the opposite direction during discharging. After the work is completed, the power connection with the engine is cut off.
2. Hydraulic system
The engine power taken out by the power take-off is converted into hydraulic energy (displacement and pressure), and then output into mechanical energy (speed and torque) through the motor to provide power for the rotation of the mixing drum.
3. Reducer
The speed output by the motor in the hydraulic system is reduced and transmitted to the mixing drum.
4. Operating mechanism
(1) Control the rotation direction of the mixing drum so that it rotates forward during the feeding and transportation process and rotates in the opposite direction during discharging.
(2) Control the speed of the mixing drum.
5. Mixing device
The mixing device is mainly composed of a mixing drum and its auxiliary supporting parts. The mixing drum is a loading container for concrete. When it rotates, the concrete moves along the spiral direction of the blades and is mixed and stirred during the continuous lifting and turning process. During the feeding and transportation process, the mixing drum rotates forward and the concrete moves inward along the blades. When discharging, the mixing drum reverses and the concrete is discharged outward along the blades.
The blades are the main components of the mixing device. Damage or severe wear will cause uneven mixing of concrete. In addition, if the angle of the blades is not designed properly, it will also cause segregation of concrete.
6. Cleaning system
The main function of the cleaning system is to clean the mixing drum, and it is sometimes used for dry mixing during transportation. The cleaning system also cools the hydraulic system.
7. Cab configuration of mixer truck
The semi-floating cab suspension, shock-absorbing seat, fluorescent lighting, air conditioning and other configurations are convenient and practical, and the treatment reflects humanized care.Two-stage steps, upper and lower handrails, 90-degree door opening angle, convenient for drivers and passengers to get on and off The front cover of the front flip cab, the cab forward flip angle of 55 degrees, is convenient for daily maintenance chassis inspection and repair.