How to test and evaluate the sealing performance of hydraulic seals?

The sealing performance test and evaluation of the hydraulic seal ring is one of the important steps to ensure the normal operation of the hydraulic system. This test ensures that the seals are effective in preventing leakage and contamination problems in the hydraulic system. The following details how to test and evaluate the sealing performance of hydraulic seals.

Environment check: Before starting the test, you need to check the test environment. Ensure that the environment is free of dust, oil, or other impurities, and that there is sufficient light for inspection and recording of results.

Preparation before the test: Adjust the pressure of the hydraulic system to the standard working pressure, and ensure that the system temperature is stable. The hydraulic pump and related valves shall be in the standard working position.

Check the hydraulic seal: Check the appearance of the hydraulic seal to ensure that there is no wear, crack or other damage. If any problem is found, replace the seal ring.

Hydraulic leakage test: In the adjusted hydraulic system, the leak detection instrument is connected to the possible leakage points in the system, such as hydraulic cylinders, pipe joints, etc. Then, at standard working pressure, the number and location of leaks are recorded. If a leak is detected, the polyurethane hydraulic seal needs to be inspected to determine whether it is caused by a seal failure or due to other reasons, such as loose pipe joints. If the leak is caused by the sealing ring problem, the sealing ring should be replaced.

Seal performance test: The hydraulic seal compression device is used to test the seal ring compression. Place the seal in the device, apply pressure, and record the degree of compression. The pressure and time should be kept stable during the measurement. After the test, remove the compression seal and check for indentation or deformation. If there is any abnormal condition, the sealing ring needs to be replaced.

Leakage rate test: The compression-tested seal is installed in the hydraulic system and its leakage rate is tested at standard working pressure. Record the leakage rate and duration. If the leakage rate exceeds the standard requirements, the installation and selection of the seal need to be checked, and the seal may need to be replaced.

Seal durability test: Evaluate the durability of the seal through continuous operating time testing. Record the working time of the hydraulic system under standard operating conditions. Check the appearance and performance of the seal regularly and record any damage or leakage. The durability of the seal is assessed based on the test results and the seal is replaced if necessary.

Data analysis and evaluation: According to the test results, the sealing performance of the hydraulic seal ring of the binding machine is evaluated. Compare test results with standard requirements and determine if the requirements are met. If the requirements are not met, it is necessary to further analyze the cause of the problem and take appropriate measures, such as replacing the sealing ring, adjusting the system pressure or improving the lubrication conditions.

To sum up, testing and evaluating the sealing performance of hydraulic seals requires a series of experiments and observations. By properly performing these test steps and making correct evaluations and decisions based on the test results, the normal operation of the hydraulic system can be ensured and the service life of the seal can be extended.