混凝土搅拌车作为大型施工设备，经常性的高强度工作，所以有时候会出现各种问题，需要进行维修。那么混凝土搅拌车发动机什么时候大修呢？
Concrete mixer as a large construction equipment, regular high-intensity work, so sometimes there will be a variety of problems, need to be repaired. So when will the concrete mixer engine be overhauled?
气缸内径磨损过大，圆度偏差差为0.04-0.06mm，圆柱度偏差差为0.08-0.12mm（一般按气缸下半部分和上半部分差的比值测量）。对于多缸发动机，圆度和圆柱度偏差差基于磨损较大的气缸油量显著增加，油压降低，排气管排放黑烟和蓝烟。
Cylinder inner diameter wear is too large, the roundness deviation is 0.04-0.06mm, cylindricity deviation is 0.08-0.12mm （generally measured by the ratio of the difference between the lower part and the upper part of the cylinder）。 For multi-cylinder engines, the difference in roundness and cylindricity is based on the significant increase in cylinder oil volume, decrease in oil pressure, and exhaust pipe emission of black and blue smoke
混凝土搅拌车的功率显著降低，其峰值高马力仅为额定功率的60%左右（不包括高空引起的功率下降），气缸压力小于标准压力的65%曲轴过度磨损，曲轴磨损后各轴颈的圆度和圆柱度差超过使用极限，或失圆度和锥度限制在0.10mm。水温为50^-60℃时，发动机启动或停止时无法平稳启动。
The power of concrete mixer truck is significantly reduced, its peak high horsepower is only about 60% of the rated power （excluding the power drop caused by high altitude）， the cylinder pressure is less than 65% of the standard pressure, and the crankshaft is excessively worn. After the crankshaft is worn, the roundness and cylindricity difference of each journal exceeds the service limit, or the roundness and taper are limited to 0.10mm. When the water temperature is 50^-60℃， the engine cannot start smoothly when starting or stopping
混凝土搅拌车厂家认为发动机发出异常噪音或运转异常的时候要进行大修。发动机热态运转时，气缸（活塞敲缸）有噪音，主轴承或连杆轴承有严重振动或敲击声。另外在有结冰可能的环境中使用，供水系统必须排空存水，防止管路冻裂；经常检查系统的密封性，关键部位涂抹管路用密封胶。
Concrete mixer truck manufacturers think that the engine is abnormal noise or abnormal operation of the time to carry out overhaul. When the engine is running in hot state, the cylinder （piston knocking cylinder） has noise, and the main bearing or connecting rod bearing has serious vibration or knocking sound. In addition, the water supply system must be emptied and stored in the environment where ice may be used to prevent pipeline frostbite; Check the tightness of the system regularly and apply sealant for pipeline in key parts.
因此要保证混凝土搅拌车的工作状态，日常保养尤为重要，使用前后的检查工作必不可少，更多内容就来我们网站www.zkzdsljbc.com咨询吧！
Therefore, in order to ensure the efficient working state of concrete mixer, daily maintenance is particularly important, and the inspection work before and after use is essential. More content will come to our website www.zkzdsljbc.com for consultation!
