Rubber O-ring damage in the state machinery and equipment

??Rubber O-ring damage and damage to state reasons in machinery and equipment, but also to understand the situation related to the hydraulic system.

??1. The rubber O-ring groove is collapsing because the material is not good, causing the elastic bad situation.

??2. The rubber O-ring grooves produce radial bite or broken case might be too much pressure, contacts, sharp corners, moving parts sealing gap is too large or due to improper installation and gasket material is too soft due but nor Exclude extended thermal hydraulic systems and other causes;

??3. The rubber O-ring distorted if the situation occurs, there may be an installation error or poor lubrication.

??4. A rubber O-ring occurrence of fracture, the system may be overheating, this time should be to check the quality of the type of oil, the pressure is too high, whether the other in good condition.

??5. To prevent trench mouth fillet radius in the rubber O-ring is scratched during installation and use and design have a major impact on the sealing performance.

??6. Low pressure medium, notch fillet radius no significant effect on sealing performance. Medium and high pressure, the groove fillet radius on the sealing performance significantly affected. Fillet radius r changes from 0.1 to 0.5, Von Mises stress O-ring inside the 43% increase, seals have obvious material yield, increasing the likelihood of permanent deformation of the ring.

??7. When the low pressure medium, the groove fillet radius guarantee not to stab try to choose a small value when the rubber O-ring; when high media pressure, trench mouth fillet radius recommended choice 0.2≤r≤0.24.

??Improper operation can cause O-ring seal hydraulic performance degradation

??With the rapid development of industry, accounting for more and more important sealing equipment, which relates to the normal functioning of the device, and hydraulic O-ring seal is the most widely used. Hydraulic O-rings can work under high temperature, high-pressure operating conditions. Presenting distorted picture of the main elements of the hydraulic O-ring failure is lasting deformation, and squeeze into the sealing gap movement.