FAQ
Q
How to extend the use time of the cylinder?
A
How to extend the use time of the cylinder? There are several key points in the maintenance of the hydraulic cylinder system:
1. Keep the hydraulic oil clean. Dirt in the oil can damage the components of the system.
2, keep the hydraulic oil volume. If there is less oil, air will enter and the system will not operate normally.
3. Pay attention to observe whether there is oil leakage in the cylinder. Oil leakage indicates that the seal is broken, and if it is not replaced in time, it not only consumes oil, but also reduces the output, and it does not act in severe cases.
4. Familiar with the sound of system operation. Normal and faulty sounds are different. If you hear abnormal sounds, you will know that there is something wrong, and remove it in time to prevent minor faults from becoming major damages and causing major losses.
5. Pay attention to check whether the tight parts are loose. To maintain its effective tight failure state.
The use of hydraulic cylinders is very common, and is widely cited in mechanical equipment. O-rings are the most easily damaged cylinders. When the "O" seals of the cylinders wear out, the gap between the rod cavity and the rodless cavity of the cylinder increases, which is equivalent to cutting off the oil return path of the cylinder rod cavity. In practice, due to the gap between the two chambers of the cylinder, the pressure oil in the cylinder chamber tends to flow from the high pressure area to the low pressure area. Once the flow occurs, the piston loses balance and moves to the rod chamber to find a new balance point. In this reciprocation, the piston will not stop until it is blocked by external force. The occurrence of the above phenomenon has a great impact on the operation of the hydraulic system. After replacing the "O"-shaped sealing ring of the cylinder piston, the unstable operation of the cylinder can be completely improved. At the same time, it can greatly extend the service life of the cylinder.
Q
How to repair various hydraulic stations
A
How to repair various hydraulic stations
① The material scraps extruded from the scratched groove will be embedded in the seal. During operation, while damaging the working part of the seal, it may cause new scratches in the scratched area.
②Deteriorate the surface roughness of the inner wall of the cylinder, increase friction, and easily cause creeping.
③ Increase the internal leakage of the hydraulic cylinder and reduce the working efficiency of the hydraulic cylinder. The main causes of scratches on the bore surface of the cylinder are as follows.
The hydraulic cylinder is repaired with the number "139, the middle four digits are 4009, and the back is 5915"
(1) Scars caused when assembling hydraulic cylinders
(2) Not serious running wear marks
(3) There is foreign matter mixed in the cylinder body. The traditional repair method is to remove the damaged parts for outsourcing repair, or perform brush plating or overall surface scraping. The repair cycle of hydraulic cylinders is long. , The repair cost is high.
Q
Why should hydraulic cylinders have buffer devices?
A
When the mass of the hydraulic cylinder is large or the load is large, and the moving speed is high (>12m/s), it has a large momentum due to the large inertial force. In this case, when the piston moves to the end of the cylinder, it will mechanically collide with the end cover, which will cause great impact and noise. The weight will affect the machining accuracy and even cause destructive accidents. Therefore, in large, high-speed or high-speed In high-precision hydraulic equipment, a buffer device is often provided, the purpose of which is to increase the oil return resistance when the piston approaches the terminal, thereby slowing down the moving speed of the moving parts and avoiding hitting the end cover of the hydraulic cylinder.