Cartridge sealing device with semi-solid mud filler and configured to be mounted to fluid equipment

A cartridge sealing device configured to be mounted to a port of an enclosure of fluid equipment through which a rotating shaft is inserted for preventing fluid within the enclosure from leaking through the port, the cartridge sealing device comprising:

• a shaft sleeve, a locking ring, a shaped sealing ring assembly, a semi-solid mud filler, a cylindrical main gland, an annular auxiliary gland, a support frame, and one or more detachable positioning blocks that are all mounted around the rotating shaft, wherein:
• the main gland has a cylinder at a front end and a step-shaped portion at a rear end, the step-shaped portion extending outwardly relative to the cylinder;
• the step-shaped portion is configured to be fastened to a rear end face of the enclosure surrounding the port, while the cylinder passes through the port, thereby forming a gap between an outer peripheral surface of the cylinder and an inner wall surface of the enclosure that forms the port to allow the fluid to flow therein;
• the cylinder has an inner peripheral surface surrounding an outer peripheral surface of the shaft sleeve to form a cylindrical space within which the shaped sealing ring assembly and the filler are filled and within which the filler is flowable;
• the step-shaped portion comprises a through hole extending from an outer peripheral surface to an inner peripheral surface of the step-shaped portion to communicate with the cylindrical space, the through hole having a portion forming a threaded joint that is close to the outer peripheral surface of the step-shaped portion;
• the shaped sealing ring assembly comprises a first shaped sealing ring and a second shaped sealing ring between which the filler is located;
• the auxiliary gland is fastened to a rear end face of the step-shaped portion by a pre-tightening mechanism such that a front end of the auxiliary gland protrudes axially forward into the cylindrical space from the rear end face of the step-shaped portion and abuts against the second shaped sealing ring;
• the support frame comprises one or more axial rods located between the first shaped sealing ring and the second shaped sealing ring and suspended in the cylindrical space;
• the locking ring surrounds a rear end of the shaft sleeve to secure the shaft sleeve to the rotating shaft;
• the one or more detachable positioning blocks are configured to connect the locking ring to the auxiliary gland such that the cartridge sealing device can be mounted around or removed from the rotating shaft in one step and are configured to be removed from the locking ring and the auxiliary gland such that the locking ring and the shaft sleeve can rotate with the rotating shaft during an operation of the fluid equipment;
• the one or more axial rods are configured such that an interval between the first shaped sealing ring and the second shaped sealing ring can be varied between a minimum interval and a maximum interval;
• and
• the threaded joint is adapted to be connected to an external injector for injecting the filler into the cylindrical space so as to increase a sealing pressure formed in the cylindrical space or to be blocked such that the sealing pressure can be adjusted by the pre-tightening mechanism.