How to extend the service life of hydraulic seals?
How to prolong the service life of hydraulic seals, it is necessary to analyze and understand the causes of seal failures? The failure cause can be divided into four aspects of inspection and inspection, seal manufacturing, design, use, and maintenance. Therefore, contingency measures should be taken based on two major aspects and four important factors. Secondly, to prolong the service life of hydraulic seals, we should pay attention to the familiar analysis of hydraulic oil (grease) conditions and auxiliary components used by construction machinery.
1. Selection of qualified seals:
Select the seals that meet the requirements according to the movement characteristics, oil type, oil pressure, speed, and temperature of the seal. Before installing the hydraulic seals, check according to the instructions or drawings. The external dimensions of the seal should conform to the standard: the surface should be smooth, flat, without aging and cracking. For the skeleton oil seal, the lips should be sharp and free from scratches, and the spilled rubber at the part of the lips should be rounded and smoothed.
2. Correct assembly:
Before installing hydraulic seals, check the curvature of the shaft to prevent eccentric rotation and vibration, and correct or replace it in time. When installing hydraulic seals, also pay attention to ensure a reasonable installation gap, O-ring seals used for dynamic sealing. When the hydraulic cylinder is disassembled due to repair and disassembly, the assembled cylinder should be placed on the test stand. After the hydraulic hose is installed, the full stroke action should be more than 8 times. The first few times should be moved quickly to use the impact effect to discharge the cylinder gas.
3. Periodically check the oil quality:
Regularly check the quality of the oil, replace the degraded oil in time, and periodically clean and replace the oil filter element, so that the oil can be kept clean, which is conducive to extending the life of the oil seal.
4. Prevent vibration and shock:
Because the hydraulic pulsation and vibration will occur in the hydraulic transmission, the impact of the construction machinery is also greater, so the fasteners of the hydraulic system should be regularly checked and fastened in time. Practice has shown that when the viscosity of the hydraulic oil is high and the temperature is low, the hydraulic pump is likely to cause cavitation. Therefore, when working in the cold season, you should use a high gradient working oil with a wide temperature range.
5. Other measures:
There are many measures to prolong the service life of hydraulic seals, such as paying attention to the operation and maintaining the proper oil pressure; carefully checking the roughness of the sealed part to make it meet the standard.
