Put a wooden wedge between the supporting wheel and the raceway to control the rotation of the mixing drum. Be sure to pay attention to it; Turn off the engine, remove a high-pressure oil pipe of the hydraulic motor, the mixing drum can rotate freely, control the rotation of the mixing drum, turn the maintenance hole to the lower part, and then open the maintenance hole to clean out the commercial concrete in the drum. At this time, it must be noted that after the product concrete is discharged, the commercial concrete cement mixer truck shall be restored to its original state.

自动上料搅拌机主要由搅拌筒及其辅助支撑部件组成。搅拌筒是混凝土的装载容器，它是由耐磨薄钢板制成，为了能够自动装、卸混凝土，其内壁焊有特殊形状的螺旋叶片。

The automatic feeding mixer is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is a concrete loading container, which is made of high-quality wear-resistant steel plate. In order to automatically load and unload concrete, its inner wall is welded with spiral blades of special shape.

转动时混凝土沿叶片的螺旋方向运动，在不断的提升和翻动过程中受到混合和搅拌。在进料及运输过程中，搅拌筒正转，混凝土沿叶片向里运动，出料时，搅拌筒反转，混凝土沿着叶片向外卸出。搅拌筒的转动则是靠液压驱动装置来保证。

When rotating, the concrete moves along the spiral direction of the blade and is mixed and stirred in the process of continuous lifting and turning. During feeding and transportation, the mixing drum rotates forward, and the concrete moves inward along the blade. When discharging, the mixing drum reverses, and the concrete is discharged outward along the blade. The rotation of the mixing drum is guaranteed by the hydraulic driving device.

装载量为3～6立方自动上料搅拌车一般采用由汽车发动机通过动力输出轴带动液压泵，再由高压油推动液压马达驱动搅拌筒，装载量为9～12立方的则由车载辅助柴油机带动液压泵驱动液压马达。叶片是搅拌装置中的主要部件，损坏或严重磨损会导致混凝土搅拌不均匀。另外，叶片的角度如果设计不合理，还会使混凝土出现离析。

The automatic loading mixer with a loading capacity of 3 ~ 6 cubic meters generally adopts the hydraulic pump driven by the automobile engine through the power output shaft, and then the hydraulic motor driven by the high-pressure oil to drive the mixing cylinder. For the mixer with a loading capacity of 9 ~ 12 cubic meters, the hydraulic pump driven by the on-board auxiliary diesel engine drives the hydraulic motor. Blade is the main component of mixing device. Damage or serious wear will lead to uneven mixing of concrete. In addition, if the design of blade angle is unreasonable, the concrete will be separated.

自动上料搅拌机转动时要注意的，避免在操作中出现操作失误。

Attention shall be paid to when the automatic feeding mixer rotates to avoid operation errors in operation.

磨合不良。测试表明，新的或大修的柴油发动机通常需要运行30到40小时才能达到良好的技术条件。在没有良好磨合的情况下全自动上料搅拌车直接正常负载工作是导致蓝烟的常见原因。全自动上料搅拌车倒角的活塞环或扭曲的环将使方向错位，而油泵（混凝土搅拌机）将进入燃烧室。柴油机长时间低负荷工作（负荷小于30~50％），气缸内压力低。活塞环和缸套的内表面光滑度，椭圆度，锥度和匹配间隙不符合要求，或者由于连杆弯曲，活塞偏心，主轴孔和缸套不垂直，煨油喷出蓝烟。

Poor running in. Tests show that new or overhauled diesel engines usually need to run for 30 to 40 hours to achieve good technical conditions. Under the condition of no good running in, the most common cause of blue smoke is that the full-automatic feeding mixer works directly under normal load. The chamfered piston ring or twisted ring of the full-automatic feeding mixer will cause the direction to be misaligned, The oil pump (concrete mixer) will enter the combustion chamber. The diesel engine will work under low load for a long time (the load is less than 30 ~ 50%), and the pressure in the cylinder is low. The smoothness, ovality, taper and matching clearance of the inner surface of the piston ring and cylinder liner do not meet the requirements, or because the connecting rod is bent, the piston is eccentric, the main shaft hole and cylinder liner are not vertical, and the simmered oil emits blue smoke.

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