News
- 2016-06-03 17:19:37
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Hydraulic seal failure analysis and solution
??Hydraulic seal lip wear too much
??Cause of
??1. insufficient lubrication.
??2. Object and seizure.
??3. shaft through the large surface roughness.
??Solution
??1. Fill with oil; instead lips sealed grease is applied between the two lip; changing the structure near the seal, the oil well back lip portion.
??2. Do not assemble contaminated dust and ash and sand on the shaft seal; in the washing machine, use of lubricants.
??3. Fix the surface roughness of the mating surfaces; replace axis specified surface roughness.
??Hydraulic seal lip portion of the partial wear
??Cause of
??1. Install eccentric great.
??2. Tilt the installation.
??Solution
??1. Increased concentricity shaft and the cavity; increase the stiffness of the shaft.
??2. Use the specified size of the cavity; the chamber is chamfered, appropriately sized; improved assembly fixtures.
??Hydraulic seal lip portion sclerosis
??Cause of
??1. abnormally high temperature.
??2. insufficient lubrication.
??Solution
??1. The investigation of the cause, to prevent the temperature rise; use good heat lip material.
??2. Add lubricant quantitative run again; as acute treatment can be.
??Hydraulic seal lip portion Softening
??Cause of
??1. lip material inappropriate.
??Solution
??1. The choice of material is not swollen lip oil; no cleaning fluid and gasoline to clean oil seal.
??Hydraulic seal lip Injuries
??Cause of
??1. Assemble bad.
??2. improper use.
??3. Adverse shaft chamfer.
??4. The seizure of a foreign body.
??Solution
??1. Use the auxiliary tool to avoid damage during assembly seals; shaft to avoid "flash" and "glitches."
??2. To improve the handling, storage method, try to avoid contact with the lip end.
??3. True Axis chamfer.
??4. Clean the machine to remove impurities sealing medium.
??Hydraulic seal lip portion Flip
??Cause of
??1. Adverse shaft chamfer.
??2. Assemble the poor.
??3. Seal the inner diameter is small.
??Solution
??1. The right chamfer, chamfering is applied when installing grease.
??2. Ensure that the cavity axis concentric shaft grease is applied properly assembled.
??3. Reduce the oil seal lip interference.
??Hydraulic seal lip damage waist
??Cause of
??1. Assemble bad.
??2. The internal pressure is too large.
??Solution
??1. the shaft assembly with the cavity concentric attention.
??2. The test is not to use the seal resistant to pressure than standard stress test; seal pressure switch; pressure does not change the structure of big happened.
??Hydraulic Seals Spring Escape
??Cause of
??1. Adverse shaft chamfer.
??2. Assemble the poor.
??Solution
??1. Use the correct chamfer, chamfering applying grease fitting.
??2. Ensure that the shaft assembly concentric with the cavity, applying grease on the shaft.
??Hydraulic seals Seal deformation
??Cause of
??1. Assemble bad.
??Solution
??1. Improved assembly fixtures.
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