Design of sealing ring, groove and bottom fillet of sealing ring
The O ring seal is a typical extrusion seal. The compression ratio and stretch of the section diameter of O ring are the main contents of sealing design, which are important for sealing performance and service life. The O ring is usually installed in the sealing groove to seal. The good sealing effect of O shape seal ring depends largely on the proper matching of the size of the O ring and the groove size, forming a reasonable sealing ring, the amount of compression and the amount of tension. Sealing device design, processing, if the O ring compression is too small, it will cause leakage; too much compression will lead to O ring rubber stress relaxation caused by leakage. Similarly, excessive stretching in the work of the O ring will also accelerate aging and cause leakage. The standards of the countries all over the world have strict regulations.
The rounded corners at the bottom of the groove are mainly designed to avoid stress concentration. The value of fillet radius, dynamic sealing groove desirable R=0.3~1mm, static sealing groove, it is recommended that its O ring section diameter of half, that is R=d/2
Hello, Lei Xin sealing ring, the outer corner of the groove of the sealing ring is designed to prevent the scratch of the O ring assembly. It generally uses a smaller rounded radius, that is, r=0.1~0.2mm. This avoids the formation of a sharp edge, the O ring does not dare to squeeze out the gap, and can make the retainer stable
