Spiral Seal is a use of hydrodynamic radial anti lost non-contact shaft seal. Abroad from 1916 began to spiral centrifugal pump wire seals, and later successfully extended to many harsh conditions such as high temperature, cryogenic, corrosive particles and the liquid medium with seal. In recent decades, the domestic first nuclear-powered space devices and other cutting-edge technology in the field, as well as in high-speed centrifugal compressor successfully applied on the screw seal, and then in the general technical field of centrifugal pumps and other chemical acid solution was centrifuged sealed with a screw on the pump to get good results.
Spiral sealed into two categories:
One common screw seal, which is part of the shaft or the sealing surface of one of the holes turning the spiral groove;
Second spiral labyrinth seal, which is part of the shaft and the sealing surface of the pores, respectively turning the spiral groove in the opposite rotation.
Usually referred to as normal screw spiral metal seal seal. Spiral Labyrinth aka "composite spiral seal."
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