Patent ID: 8448950
Filing Date: 2013-05-28
Classification: F16J

Abstract:
1. A split mechanical seal comprising split seal rings in which a static seal ring provided on the side of a housing, or a rotating seal ring provided to a rotary shaft inserted through a housing, is split along the circumferential direction; and split flanges in which split contact surfaces of the split seal rings are placed together, the split flanges being fitted on external peripheral surfaces of the split seal rings; the split mechanical seal being configured so that a seal is formed by seal end surfaces that are the opposing end surfaces of the static seal ring and the rotating seal ring; said split mechanical seal characterized in that split ring fitting holes into which split rings having a rectangular cross-section are fitted are formed along the entire length in the circumferential direction between the split seal rings and the split flanges; the split rings rectangular in cross-section are provided in the split ring fitting holes with the phases of the split seal rings and the split flanges shifted from each other in the circumferential direction such that one end of each split ring protrudes from the split contact surface; and protruding portions of the split seal rings fit into corresponding split ring fitting holes when the split seal rings and the split flanges are placed together at the split contact surfaces.