In the process of using the agitator of the hydraulic pump, if the hydraulic system breaks down, the performance of the agitator will be greatly reduced. It is necessary to understand the causes of the hydraulic system faults well, to be able to check and repair them well, so that the mixer can return to normal operation without affecting the work progress. Let's take a look at the detection method of the failure of the hydraulic pump of the automatic feeding mixer.

　　气味诊断方法:是指鼻子闻到液压油是否有异味，如果闻到液压油局部有异味，液压泵等液压元件局部发热，导致液压油燃烧冒烟，根据发热程度可以判断。闻一下液压油是否有恶臭或辛辣味，如果有说明液压油已被严重污染，不能继续使用。

　　Odor diagnosis method: it refers to whether the nose smells the peculiar smell of the hydraulic oil. If the nose smells the peculiar smell of the hydraulic oil, the hydraulic pump and other hydraulic components are locally heated, which causes the hydraulic oil to burn and smoke, it can be judged according to the degree of heating. Smell the hydraulic oil to see if it has a bad smell or pungent smell. If so, it means that the hydraulic oil has been seriously polluted and cannot be used again.

　　视觉诊断方法:用肉眼观察液压系统的工作状态，观察液压系统各压力点的压力值和温度变化，检查油液是否干净，油液量是否充足。观察液压阀、管路接头、液压缸端盖、液压泵传动轴是否漏油。观察设备加工后的产品或进行性能测试，识别运动机构的工作状态，系统压力和流量的稳定性，电磁阀的工作状态。

　　Visual diagnosis method: observe the working state of the hydraulic system with naked eyes, observe the pressure value and temperature change of each pressure point of the hydraulic system, and check whether the oil is clean and sufficient. Observe whether the hydraulic valve, pipeline joint, end cover of hydraulic cylinder and transmission shaft of hydraulic pump leak oil. Observe the processed products or conduct performance test to identify the working state of the moving mechanism, the stability of the system pressure and flow, and the working state of the solenoid valve.

　　听觉诊断方法:是用耳朵判断液压系统或部件是否正常工作。听液压泵及液压系统噪音是否过大;听溢流阀等部件是否有异常声音;听工作台换向时，冲击声是否过大;注意听活塞撞击液压缸底部的声音。

　　Auditory diagnosis method: it is to judge whether the hydraulic system or components work normally by ears. Listen to whether the noise of hydraulic pump and hydraulic system is too loud; listen to whether there is abnormal sound of overflow valve and other components; listen to whether the impact sound is too loud when the workbench changes direction; pay attention to the sound of piston hitting the bottom of hydraulic cylinder.

　　触摸诊断方法:用手触摸运动部件的温度和工作状态，用手触摸液压泵壳体、油箱外壁、阀体壳体的温度。正常温度应在55℃左右，如超过60℃应加以识别。用手触摸活动部件和油管，看是否有明显的振动。

　　Touch diagnosis method: touch the temperature and working state of moving parts by hand, and touch the temperature of hydraulic pump housing, oil tank outer wall and valve body housing by hand. The normal temperature should be about 55 ℃. If it exceeds 60 ℃, it should be identified. Touch moving parts and oil pipes with hands to see if there is obvious vibration.

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