The function of the cylinder is to convert the pressure energy of compressed air into mechanical energy. The cylinder is a part that is easy to be ignored in the maintenance and repair of the concrete mixing plant. Here is the fault and repair method of the cylinder from the loading mixer: under normal circumstances, the cylinder should be in place quickly with the on-off switch of the solenoid valve power source; As the cylinder piston moves repeatedly, it is very important to lubricate the cylinder wall and piston. Due to improper assembly and long-term use of the cylinder, the pneumatic actuator (cylinder) is prone to internal and external leakage, insufficient output force and unstable action, poor cushioning effect, damage of piston rod and cylinder head and other faults.

1、气缸出现内、外泄漏，内漏是指气缸活塞组件磨损严重，造成那个活塞前后窜气，影响气缸动作的快慢，严重时造成开关不到位；外漏是指活塞杆与气缸接触的端部密封件磨损严重而漏气，造成活塞杆回复速度慢，甚回复不到位。

1. The cylinder has internal and external leakage. Internal leakage refers to the serious wear of the cylinder piston assembly, resulting in the front and rear blow by of the piston, affecting the speed of the cylinder action, and causing the switch not in place when it is serious; External leakage refers to the serious wear and leakage of the end seal between the piston rod and the cylinder, resulting in the slow recovery speed of the piston rod, or even the recovery is not in place.

2、自上料搅拌车，气缸的输出力不足和动作不平稳，一般是因活塞或活塞杆被卡住、润滑不良、供气量不足，或缸内有冷凝水和杂质等原因造成的。对此，应调整活塞杆的中心；检查油雾器的工作是否可靠；供气管路是否被堵塞。当气缸内存有冷凝水和杂质时，应及时。

2. Since the loading mixer truck, the output force of the cylinder is insufficient and the action is unstable, which is generally caused by the piston or piston rod being stuck, poor lubrication, insufficient air supply, or condensate and impurities in the cylinder. In this regard, the center of the piston rod should be adjusted; Check whether the oil atomizer works reliably; Check whether the air supply pipeline is blocked. When there is condensate and impurities in the cylinder, it shall be removed in time.

3、自上料搅拌车，气缸的缓冲效果不良，一般是因缓冲密封圈磨损或调节螺钉损坏所致。此时，应更换密封圈和调节螺钉。

3. Since the loading mixer truck, the buffer effect of the cylinder is poor, which is generally caused by the wear of the buffer seal ring or the damage of the adjusting screw. At this time, replace the sealing ring and adjusting screw.

4、自上料搅拌车，气缸的活塞杆和缸盖损坏，一般是因活塞杆安装偏心或缓冲机构不起作用而造成的。对此，应调整活塞杆的中心位置；更换缓冲密封圈或调节螺钉。

4. Since the loading mixer truck, the damage of the piston rod and cylinder head of the cylinder is generally caused by the eccentric installation of the piston rod or the failure of the buffer mechanism. In this regard, the central position of the piston rod should be adjusted; Replace the buffer seal ring or adjusting screw.

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