What are the reasons for the noise of the hydraulic press

1. The relief valve is unstable, such as due to improper combination of the slide valve and the valve hole or the contact between the cone valve and the seat is stuck with dirt, the damping hole is blocked, the spring is skewed or

Failure causes the spool to jam or move inefficiently in the valve hole, causing system pressure fluctuation and noise. In this regard, attention should be paid to cleaning and dredging Yin hole; Check the relief valve, if found

If there is damage, or if the wear exceeds the regulations, it should be repaired or replaced in time;

2 Hydraulic pump or hydraulic motor quality is not good, is usually the main part of the hydraulic transmission noise. The manufacturing quality of the hydraulic pump of the small hydraulic machine is not good, and the accuracy is not consistent

In accordance with the technical requirements, the pressure and flow fluctuation, the oil trapping phenomenon is not well eliminated, the sealing is not good, and the bearing quality is poor, which are the main reasons for the noise. In use, by

The hydraulic pump parts wear, the gap is too large, the flow is insufficient, and the pressure is easy to fluctuate, which will also cause noise. In the face of the above reasons, one is to choose a good quality hydraulic pump or hydraulic motor

The second is to strengthen the repair and maintenance, for example, if the tooth shape accuracy of the gear is low, the gear should be researched to meet the contact surface requirements; If the vane pump has trapped oil phenomenon, the three of the oil distribution pan should be corrected

Angle groove to eliminate trapped oil; If the axial clearance of the hydraulic pump is too large and the amount of oil is insufficient, it should be repaired so that the axial clearance is within the allowable range; If the hydraulic pump is not selected, it should be replaced

3. Air intrusion into the hydraulic system is the main cause of noise. Because the hydraulic system of the small hydraulic machine invades the air, its volume is larger in the low pressure area, and when it flows to high pressure

When the area is compressed, the volume suddenly decreases, and when it flows into the low pressure area, the volume suddenly increases, and the sudden change in the volume of the bubble produces an "explosion" phenomenon, thus producing noise

This phenomenon is often referred to as a "hole". For this reason, an exhaust device is often set on the hydraulic cylinder for exhaust. In addition, after driving, the actuator is made to travel quickly and fully Exhaust several times is also a common method

Four column press