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Description of the basic problems of the seal
1. Factors that cause seal leakage
(1) Installation problems: 1 Incorrect sealing direction leads to leakage 2 Mixing during installation, or foreign matter in the pipeline, dust, leaking into the seal 3 Improper assembly causes leakage due to seal damage 4 Scratch on the surface of the sealing rod causes leakage 5 During welding , 6 Concentricity is not enough to lead to eccentricity, partial load causes leakage 7 The coating is unevenly processed, and the paint enters the sealing ring. Seals
(2) Seal selection problem 1 The gap is bitten due to excessive pressure 2 After the air is mixed, the adiabatic compression causes the seal to burn. 3 The sealing material is incompatible with the medium, causing the material such as expansion to deteriorate. 4 The high temperature causes the material to deteriorate. 5 Low temperature Causes the material to harden, shrinkage 2 causes leakage 6 High frequency reciprocating motion causes the seal to heat up, dry grinding 7 low pressure, low speed, slow motion 8 poor lubrication leads to increased seal wear 9 Due to vibration of components due to leakage 10 environmental dust caused by seal Abnormal wear 11 rust in the seal groove causes leakage. Seals
(3) Seal assembly design problem 1 improper selection of guide support material, damage cylinder, piston rod 2 friction pair gap is not suitable, resulting in gap extrusion bite 3 cylinder cylinder piston end of the thread lead angle is not appropriate, damage seal 4 Stiffness, self-weight calculation error caused by poor motion 5 Sealed installation lead angle Improper damage Sealing ring 6 Sliding surface roughness is not suitable, the wear sealing ring 7 is unevenly plated, the hole is sealed through the surface, scratches, wear seal ring 8 Sealing grooves, especially shaft seal groove roughness is not enough, wear, damage seal 9 piston, piston rod plating pores cause leakage 10 lubrication poor wear, bite cylinder, piston rod.
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