How To Extend The Service Life Of Hydraulic Seals?

How to extend the service life of hydraulic seals, which requires analysis and understanding of the reasons for the failure of the seals? The failure causes can be divided into four aspects for inspection and inspection, seal manufacturing, design, use, and maintenance. Therefore, it is necessary to integrate two major aspects and four important factors to take contingency measures. Secondly, to prolong the service life of hydraulic seals, attention should also be paid to the conditions of hydraulic oil (grease) used by construction machinery, auxiliary components and other related parts.

Hydraulic seals

1. Choose qualified seal specifications:

According to the movement characteristics of the sealing part, the type of oil, the oil pressure, the speed, and the temperature, the seals that meet the requirements should be selected. Before installing the hydraulic seals, they should be inspected according to the instructions or drawings. The external dimensions of the seal should meet the standard: the surface should be smooth, flat, free from aging and cracks. For the skeleton oil seal, the lip should be sharp, free from scratches, and the parting part of the lip should be smooth and rounded.

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, attention should also be paid to ensuring a reasonable installation clearance, and the O-ring used for dynamic sealing. When the hydraulic cylinder is assembled after being repaired and disassembled, the assembled cylinder should be placed on the test bench. 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. Regularly check the oil quality:

Regularly check the quality of the oil, replace the degraded oil in time, clean and replace the oil filter element regularly, so as to keep the oil clean and prolong the service life of the oil seal.

4. Prevent vibration and shock:

As hydraulic pulsation and vibration are generated in the hydraulic transmission, and the impact on the construction machinery is relatively large, the fasteners of the hydraulic system should be checked regularly and tightened in time. Practice has shown that when the hydraulic oil has high viscosity and low temperature, it is easy to cause cavitation in the hydraulic pump. Therefore, when constructing in cold seasons, high gradient working oil with a wide temperature range should be used instead.

5. Other measures:

There are many measures to prolong the service life of hydraulic seals, such as paying attention to operation and maintaining proper oil pressure; carefully detecting the roughness of the sealed part to make it reach the standard.