Integral auxiliary sealing ring for split mechanical seal and online preparation method thereof

Abstract

The invention discloses an integral auxiliary seal ring for a split mechanical seal. The integral auxiliary seal ring is in a closed round ring shape without a joint in the middle. The seal ring is prepared by using an adhesive tape. The seal ring is prepared by the following steps: carrying out primary irradiation crosslinking on a middle section of the adhesive tape to form a crosslinked section; stretching the crosslinked section; bonding the two ends together; and carrying out secondary irradiation crosslinking on the bonded two ends of the adhesive tape to form the seal ring. The invention also discloses an online preparation method of the auxiliary seal ring. The seal ring is simple in structure and convenient to manufacture. The product seal ring is free of a split face and the joint, and an end coupling structure for the seal strip is not designed. The seal ring solves the problem that the split auxiliary seal ring is weak in coupling strength or great in rigidity and poor in flexibility of the joint, an arc joint has a leakage gap after a standard seal ring is folded to a C-shaped arc, so that the reliability and the sealing ability of the integral auxiliary seal ring forthe split mechanical seal are improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical seals, in particular to an integral auxiliary seal ring for split mechanical seals and an online preparation method thereof. Background technique [0002] The split mechanical seal is mainly used for the shaft seal of the power input shaft of pumps, mixers, compressors and other equipment, which solves the problem of dismantling the shaft end parts when repairing and replacing the shaft seal of large equipment. For this reason, the split mechanical seal adopts split dynamic and static rings, and the elastic element adopts multiple sets of small springs to seal the gap between the dynamic ring and the main shaft or the shaft sleeve and seal the gap between the static ring and the housing. All O-rings are also split O-rings or two standard O-rings are folded into a semi-arc and opposed to form a relative ring. [0003] In the current known technology, there are many types of split surface joints...

AI Technical Summary

Problems solved by technology

One is to fold two standard O-rings into semicircular arcs to form opposite rings, and then place them in the preset seal groove, such as ZL200910208462.1, without breakpoints and not easy to tear, but the joints are due to There are large gaps in the circular cross-section, and the seal is not reliable

The other is to add a relative ring seal on the basis of this design concept, and displace two relative ring interfaces to form a double seal similar to a labyrinth seal, such as ZL201310287757.9, which has a reliable seal and will not tear. At the same time, standard parts can still be used, but this invention has the problem of large frictional resistance of the O-ring when the compensation ring moves

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