Mechanical seal device of large dredger dredge pump with radial adjustment mechanism

Abstract

The invention relates to a mechanical sealing device, provided with a radial adjusting mechanism, for a dredge pump of a large-size dredger. The mechanical sealing device comprises a sealing box, a rotating seal ring seat and a stationary seal ring seat, wherein the sealing box is hermetically connected with the dredge pump; the rotating seal ring seat is positioned inside the sealing box and is equipped with a rotating seal ring; the stationary seal ring seat is equipped with a stationary seal ring; a push ring is arranged between the stationary seal ring seat and the sealing box; the rotating seal ring seat and a shaft sleeve are connected in a fastening manner by using a fastening bolt, and the rotating seal ring seat rotates with a pump shaft; a supporting space is formed between the inner wall of the stationary ring seat and the outer wall of the shaft sleeve; a stationary seal ring radial adjusting mechanism for overcoming gravity-caused sinking of the stationary seal ring and the stationary seal ring seat is mounted inside the supporting space. The mechanical sealing device provided by the invention is used for solving the problem that the rotating seal ring and the stationary seal ring are not concentric because of the gravity of the stationary ring during large-shaft-diameter mechanical seal compensation, as well as the problem that the friction force in the axial circumference direction is not distributed uniformly because of non-uniform circumferential clearance of a sealing ring for sealing the stationary seal ring and the stationary seal ring seat; the mechanical sealing device has the advantages of guaranteeing the stability and reliability of performances of user equipment, also solving the problems of deviation, up-warping, dripping and leakage of shaft seal of the equipment and prolonging the service life of a sealing device.

Description

technical field [0001] The invention relates to the field of mechanical seals, in particular to a mechanical seal device of a large dredging dredger pump with a radial adjustment mechanism. Background technique [0002] At present, the pump shaft sealing device of large dredgers at home and abroad adopts L-shaped rubber gasket sealing device. Its working principle is that three static L-shaped rubber gaskets 101 and the rotating shaft sleeve 104 dynamically rub against each other, and the pressure plate 102 is connected with the sealing chamber 103. , provide high-pressure clean water between the L-shaped rubber gasket seals to lubricate and block the pumped medium, use the elasticity of the rubber itself and the attached spring to provide wear compensation to achieve the purpose of sealing, see figure 1 . This kind of sealing device is suitable for a narrow range of working conditions, and its service life is unstable. The actual service life is mostly 1 to 6 months. It is...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems existing in the known technology, the present invention provides a method for compensating the non-concentricity of the dynamic and static rings caused by the gravity of the static ring of the large shaft diameter mechanical seal, and the uneven circumferential gap of the sealing ring between the static ring and the static ring seat. Causes the problem of uneven distribution of friction force in the axial and circumferential direction, ensures the stability and reliability of the user's equipment performance, and at the same time solves the problems of running, popping, dripping, and leaking of the equipment shaft seal, and prolongs the service life of the sealing device. Mechanical seal device of large dredger dredger pump with adjustment mechanism

Images