Hydraulic cylinder genus Hydraulic system In addition to the reason of the hydraulic oil cylinder itself, the occurrence of its operation failure is also related to the whole system.
Therefore, carefully investigate the symptoms of the hydraulic cylinder when cleaning up the operating problems, and select the method of logical reasoning and item by item coercion.
Carefully analyze the cause of the problem from the outside to the inside, and then determine the cleaning method to prevent blind demolition and unloading.
Failure cause analysis of hydraulic cylinder during operation:
Among the many reasons for hydraulic cylinder operating problems, there are reasons for improper equipment use and protection,
In this paper, we will systematically analyze the common typical operating fault of hydraulic cylinder - poor action.
The poor action of hydraulic oil cylinder is mostly manifested as: the hydraulic oil cylinder cannot act, the hydraulic oil cylinder is not sensitive (there is blocking phenomenon), and the hydraulic oil cylinder is creeping.
The selection of hydraulic cylinder has the following basic conditions: 1. inner diameter; 2. Travel; 3. Application pressure; 4. Out of operation mode
The following conditions are more necessary:
1. When the actuating speed of the hydraulic cylinder after loading reaches a certain specification, it is necessary to select the hydraulic cylinder with buffer equipment.
2. When reaching a higher speed, a reduction valve must be installed outside the hydraulic cylinder.
3. Carefully select hydraulic oil and oil seal. Different hydraulic oils are suitable for oil seals made of different materials to ensure the life of hydraulic cylinders.
In order to reduce the cost, some manufacturers do not adjust and temper the piston rod, the rod coating is poor, and the cylinder barrel finish is not up to standard,
The guide sleeve should be made of copper instead of nodular cast iron. Although the cost is reduced, the quality of the hydraulic cylinder is not up to the requirements.
In order to completely meet the user's requirements, in addition to the above two elements, there is another point that the hydraulic cylinder must be correctly used and protected at a fixed time.
The oil cylinder shall be deflated before use, the buffer regulating valve shall be adjusted to a reasonable position, the oil cleanliness shall be checked regularly, the dust on the oil cylinder shall be sorted out regularly, and other attention shall be paid to waterproof and fireproof.
In the past 20 years, China's hydraulic profession has developed rapidly, and hydraulic cylinders can completely replace imports,
According to our experience, the processing level of the oil cylinder is completely qualified by domestic manufacturers, and the key is the sealing element,
Domestic seals can not completely replace imports, so we advocate that imported seals should be used in important applications, such as Japan's NOK seals.
The phenomenon that the hydraulic oil cylinder cannot act often occurs on the hydraulic oil cylinder that has just finished the equipment.
To eliminate this problem, the main reason should be found outside the hydraulic cylinder,
Whether the resistance of the hydraulic cylinder to perform the moving parts is too great, and whether there are conditions such as jamming, wedging or against other parts; Whether the oil inlet pressure reaches the specified value.
After cleaning the external elements, further check the reasons for the connotation of the hydraulic cylinder and adopt the corresponding cleaning methods.
