Spinning oil pump interface leaks are common but preventable faults, mainly referring to seal failures at connections such as flanges and threads.
Main causes:
1. Seal aging or damage: O-rings and sealing gaskets lose elasticity or crack due to prolonged pressure, chemical corrosion from the oil, or temperature changes.
2. Improper fastening: Bolts not tightened according to the correct sequence and torque, causing uneven stress; or loosening due to vibration or thermal expansion and contraction.
3. Damage to the interface surface: Flange sealing surfaces with scratches, corrosion, or deformation, preventing tight contact with the seal.
4. Pipeline stress: Excessive stress when installing connecting pipelines causes long-term stress at the interface leading to leaks.
Solutions:
1. Replace seals: Use new seals that are compatible with the oil and properly sized (e.g., fluororubber O-rings).
2. Proper fastening: Use a torque wrench and tighten bolts step-by-step in a diagonal sequence to the specified torque.
3. Inspect interface surfaces: Clean and check sealing surfaces; repair or replace parts if damaged.
4. Eliminate stress: Adjust pipeline supports to ensure connections are natural and free of forced stress.
Core point: Regularly check fastening status and use compliant seals to effectively prevent most interface leaks.