HELICAL SPRING CYLINDER TYPE DYNAMIC ROTARY SEAL CONSTRUCTED WITH C-TYPE PARTIAL RINGS WHICH JOINED BY DOVETAIL JOINT METHOD

摘要

A rotary body dynamic sealing apparatus with a pipe wound along a spiral by connecting a plurality of C-type partial rings in a dovetail joint method is provided to supply a perfect dynamic rotary sealing apparatus by removing all defects of a currently circulated mechanical seal. In a rotary body dynamic sealing apparatus with a pipe wound along a spiral by connecting a plurality of C-type partial rings in a dovetail joint method, a thin metal plate is formed so as to have a C-type partial ring(1). Both ends of the partial ring have male and female shapes of a dovetail joint. A plurality of C-type partial rings are continuously connected along a spiral and are permanently bonded by a welding or brazing method so as to have a spiral spring pipe shape. A rotary shaft sealing apparatus is manufactured of a spiral spring pipe(5). The inner and outer surfaces of the spiral spring pipe are machined to construct a function ring on the spiral spring pipe. A compression ring is provided to prevent leakage between the function rings.