混凝土搅拌车正常的噪音是没有问题的，但如果搅拌车发生不正常的噪音，那就是车辆的某个部位出现问题了，在混凝土搅拌车，液压系统出现异常噪音比较多，一起来看看搅拌车液压系统的噪音办法。搅拌车液压系统发生噪音主要是先导阀功能不稳定造成的，就是先导阀前腔压力高频振动引起空气振动而产生的噪音。混凝土搅拌车液压溢流阀引发噪音的原因及办法：
There is no problem with the normal noise of the concrete mixer, but if there is abnormal noise in the mixer, it is a problem in some part of the vehicle. In the concrete mixer, there is more abnormal noise in the hydraulic system. Let's take a look at the noise solutions of the hydraulic system of the mixer. The noise of the mixer hydraulic system is mainly caused by the unstable function of the pilot valve, which is the noise caused by the air vibration caused by the high frequency vibration of the pressure in the front chamber of the pilot valve. Causes and solutions of noise caused by hydraulic relief valve of concrete mixer truck:
1. 油液中混入空气，在先导阀前腔内形成气穴现象而引发高频噪音，此时要做的就是及时的排尽空气并避免外界空气的进入。
1. When air is mixed into the oil, cavitation will be formed in the front cavity of the pilot valve, which will cause high-frequency noise. At this time, what we need to do is to exhaust the air in time and avoid the entry of external air.
2. 针阀在使用过程中因频频敞开而过度磨损，使针阀锥面与阀座不能密合，形成先导流量不稳定，产生压力波动而引发噪音，此时应及时修理或者替换针阀。
2. The needle valve is excessively worn due to frequent opening in the process of use, so that the cone surface of the needle valve and the valve seat can not be closed, resulting in unstable pilot flow, pressure fluctuation and noise. At this time, the needle valve should be repaired or replaced in time.
3. 先导阀因弹簧疲劳变形形成其调压功能不稳定，使得压力波动大而引发噪音，此时需要更换弹簧。
3. The pressure regulating function of the pilot valve is unstable due to the fatigue deformation of the spring, which makes the pressure fluctuate greatly and causes noise. At this time, the spring needs to be replaced.
混凝土搅拌车液压油缸噪音原因及办法：
Causes and solutions of hydraulic cylinder noise of concrete mixer truck:
1. 油液中混入空气或者液压缸中空气未彻底排尽，在高压效果下产生气穴现象而引发较大噪音，此时应尽快排尽空气。
1. The air in the oil or the air in the hydraulic cylinder is not completely exhausted, resulting in cavitation under the high pressure effect and causing large noise. At this time, the air should be exhausted as soon as possible.
2. 缸头油封过紧或活塞杆弯曲，在运行过程中也会因为别劲而产生噪音，此时必须更换油封或者校正活塞杆。
2. If the oil seal of the cylinder head is too tight or the piston rod is bent, the noise will be produced due to other force during operation. At this time, the oil seal must be replaced or the piston rod must be corrected.
