Rubber O-rings are typically extruded seals. The compression ratio and elongation of the cross-sectional diameter of the O-ring are the main contents of the seal design, which are of great significance to the sealing performance and service life. The good sealing effect of the O-ring mainly depends on the correct matching of the size of the O-ring and the size of the groove to form a reasonable compression and tension.
1. The amount of tightening and the amount of stretching are indispensable factors
Because the composition of rubber O-ring plastic pellets is different, the amount of compression and stretching of rubber O-rings manufactured by different companies are also different. The imagination of the stress relaxation that the commodity can cause under the condition of long-term contraction, this kind of condition will follow the slow expansion all the time, and the longer the time, the smaller the amount of contraction and stretching, making it ductile The lack of leakage causes the occurrence of leakage, and the immediate method of change is to increase the cross-sectional limit of the product, but it will also lead to the expansion of the structural characteristics of the product.
2. Temperature is a very critical factor
Temperature is very important for the relaxation of rubber O-rings. No matter what kind of rubber raw material, it will accelerate its aging rate under continuous high temperatures. When the deformation of the product exceeds 40%, the O-ring will gradually lose its ductility and workability, resulting in leakage.
I hope this content can give you a further understanding of O-rings. If you want to know more about rubber sealing rings, please continue to pay attention to us!