How to reduce the noise of the hydraulic lifting platform
The noise generated by the hydraulic system of the hydraulic lifting platform mainly has the following aspects: hydraulic valves and pipelines, oil cylinders, hydraulic pumps, and mechanical systems. Electric motors, AC contactors or electromagnetic reversing valves can also cause high noise in the hydraulic lifting platform. 1. The overflow valve of the hydraulic lifting platform can also produce high noise. When the hydraulic oil is mixed with air, the overflow valve is stuck or worn seriously, the spring fatigue deformation of the overflow valve causes the pressure adjustment of the overflow valve to be unstable, and the pressure relief time of the overflow valve is too short, etc., it is easy to cause the overflow valve The performance of the pilot valve is partially stable, causing air vibration in the pilot valve to generate noise. Therefore, we have to clean the overflow valve frequently. The overflow valve should be replaced when it is damaged or severely worn. . 2. When the hydraulic oil is insufficient, the hydraulic pump will have a hollow phenomenon, which will cause air to enter the hydraulic oil and generate high noise. 4. Noise is generated in the hydraulic cylinder. When replacing the hydraulic oil of the hydraulic lifting platform, due to operating errors, there is air in the hydraulic cylinder. Under the action of high pressure, cavitation is prone to occur and high-frequency noise is generated. When the piston rod is bent or when the new seal is replaced with a new seal, the new seal is too tight, which will also produce louder noise. If the problem is that the seal is too tight, the noise can be reduced after a period of running-in. If the piston rod is bent, it needs to be corrected. In addition, use hoses as much as possible for hydraulic pipelines, even if the pipelines are arranged, they can reduce vibration and noise, and the pipelines should avoid dead bends as much as possible. 5. After the hydraulic lifting platform repairs the hydraulic system, there are problems with the hydraulic pump, motor, valve and hydraulic installation and fixation, which can easily cause vibration and generate louder noise. 3. The hydraulic pump generates noise. When the hydraulic lifting platform rises, the hydraulic pump tells it to run. If the gear or bearing of the hydraulic pump has a problem, which causes the pressure of the hydraulic system to change periodically, it will also cause the hydraulic system to resonate and generate noise. 6. The AC contactor can also produce high noise. When the power supply voltage is lower than 85% of the rated voltage, the short-circuit ring of the contactor's E-shaped iron core is broken, the contact surface between the yoke and the armature is skewed, there is dust or rust, the contactor will produce 'buzzing'. noise. 7. The solenoid coil of the electromagnetic reversing valve is not firmly fixed, and the frequent separation and pull-in of the armature can also produce high noise. 8. The main reasons for the high noise produced by the electric motor are: the motor rotor is bent, severely worn or the bearing is damaged, which causes the electric motor to sweep the bore and produce noise; the electric motor cooling fan is damaged or is not firmly fixed to produce high noise; the electric motor is not firmly fixed, It can also cause vibration and generate high noise.
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