Repair and Solution of Sealing Oil Leakage in Gear Pump

Oil leakage of gear pump oil seal is one of the common problems, which may be caused by various factors, including but not limited to oil seal aging, improper assembly, pump body deformation, shaft wear, and harsh working environment.

When oil seal leakage is found in the gear pump, the following steps should be taken for troubleshooting and maintenance:

Step 1: Preliminary Inspection

-Observe the location of oil leakage: Determine whether the oil leakage is from the oil seal or other parts (such as interfaces, flange connections).

-* * Evaluate oil leakage volume * *: Treat minor leaks and severe leaks differently, adjust and tighten them if they are mild, and conduct in-depth maintenance if they are severe.

Step 2: Root cause diagnosis

-Oil seal wear: After prolonged use, the oil seal naturally ages and loses its elasticity and sealing performance.

-Axial offset: Radial jumping caused by shaft bending or pump body imbalance, resulting in oil seal failure.

-Excessive pressure: Pressure exceeding the rated value of the oil seal will force the lubricating oil to squeeze out.

-High temperature: High temperature accelerates material aging and may also affect sealing due to thermal expansion and contraction effects.

-Corrosion of the medium: Impurities or corrosive components in the oil attack the oil seal material.

Step 3: Maintenance Strategy

Replace the oil seal

-* * Select matching model * *: Select oil seals of the same specifications based on original factory data or measurement dimensions.

-Thoroughly clean: Remove any residue from the old oil seal and its surrounding area to prevent debris from entering the pump body.

Adjust or replace the shaft

-If the shaft has obvious wear or deformation, it needs to be corrected or replaced with a new shaft to ensure good fit with the oil seal.

Verify installation

-Ensure that all parts are correctly installed in place without tilting or misalignment.

-Check if the washers and screws are properly tightened, neither too tight nor loose.

Cooling and lubrication

-If the oil leakage of the  gear pump seal is caused by high temperature, optimize the cooling system or improve the working environment.

-Use recommended lubricating oil and regularly check and replace it to avoid contamination and aging.

Step 4: Daily Maintenance

-* * Regular inspection * *: Establish a periodic maintenance plan to detect early signs of problems.

-Training personnel: Operators should be familiar with the structure of the pump and common troubleshooting knowledge.

-* * Record file * *: Record details after each repair for future reference and trend analysis.

Through meticulous inspection and appropriate repairs, most oil seal leakage problems can be resolved.

But if the same fault repeatedly occurs or the overall performance of the pump deteriorates, further professional evaluation may be needed, and even upgrading or replacing the gear pump may be considered to avoid greater losses.

Throughout the entire maintenance process, paying attention to details and preventive measures can significantly improve the reliability and lifespan of gear pumps.