Patent ID: 6382633
Filing Date: 2002-05-07
Classification: F16J

Abstract:
A shaft seal apparatus for sealing a rotating shaft of a rotary equipment body having a sealed liquid region therein, said shaft having radial and axial directions, said apparatus having a scaled liquid side and an atmospheric region side, said apparatus comprising:a stuffing box mounted around a rotating shaft; a plurality of gland packings stuffed in a cylindrical sealed space formed between said rotating shaft and said stuffing box; and a first packing gland on the sealed liquid region side and a second packing gland on the atmospheric region side, wherein said gland packing are pressed between said first and second packing glands, thereby sealing a sealed liquid region within a rotary equipment body; wherein said first packing gland is fixed to the rotary equipment body; wherein a first packing tightening mechanism is provided between and connects said first packing gland and said stuffing box, such that said first packing gland and said stuffing box are movable relative to one another in the axial and radial directions of the rotating shaft within specific ranges, urged in the axial direction and held at specific, relatively movable positions; and wherein a second packing tightening mechanism is provided between and connects said second packing gland and said stuffing box, such that said second packing gland and said stuffing box are movable relative to one another in the axial and radial directions of the rotating shaft within specific ranges and are urged in the axial direction and held at specific, relatively movable positions.