Do you know the design knowledge of the groove width of the O-ring? Let's follow the Cheap moulded rubber o-rings editor for a simple understanding.
1. After the O-ring is installed in the groove, it is subjected to 3% to 30% compression, and the rubber material itself is incompressible, so there should be room for the deformed part of the O-ring.
2. The O-ring in the oil, in addition to the expansion of the rubber material that may be bowed due to the immersion of the oil, may also have the expansion phenomenon of the rubber material with the increase of the working temperature of the liquid: . Therefore, the groove needs to leave a certain margin.
3. The groove should not be too narrow. If the section of the O-ring fills the section of the groove, the frictional resistance during movement will be particularly large, and the O-ring cannot roll and cause serious wear. The groove should not be too wide, because when the groove is too wide, the O-ring has a large swimming range and is easy to wear. Especially when the static seal is used, if the working pressure is pulsating, the static seal will not be static, it will swim at the same pulsating frequency in the unsuitable wide groove, abnormal wear occurs, and the O-ring will fail quickly.

4. The cross-sectional area of ​​the O-ring should account for at least 85% of the cross-sectional area of ​​the rectangular groove, and the groove width should be larger than the diameter of the O-ring after compression and deformation. In many cases, the width of the groove is guaranteed to be 1.1 to 1.5 times the diameter of the O-ring section. When the internal pressure is very high, a retaining ring needs to be used, and the groove width should also be increased accordingly.
The above is the introduction of Cheap moulded rubber o-rings: the knowledge of groove width design of O-rings.