Shaft seal device using gland packing

摘要

A shaft seal apparatus that exhibits a good and reliable sealing performance, even when a rotating shaft undergoes axial vibration, eccentric revolution, or the like. This shaft seal apparatus has gland packings (2) stuffed in a sealed space (10) formed between a rotating shaft (9) and a stuffing box (1), with gland packings (2) pressed between a first packing gland (3) on a sealed liquid region side (7) and a second packing gland (4) on an atmospheric region side (8). The first packing gland (3) is fixed to a rotary equipment body (6) and the second packing gland (4) is to the stuffing box (1). A screw bolt (15) extending in the axial direction of the rotating shaft (9) is anchored to the first packing gland (3). The stuffing box (1) is provided with a through hole (16) larger than the screw bolt (15) in the flange (1a). The screw bolt (15) running through the through hole (16) has a tightening nut (17) thereon at a place which is out of and backward of the hole (16). A compression coil spring (18) is mounted on screw bolt (15) between flange (1a) and tightening nut (17).