CN213361083U

CN213361083U - FPSO hypergravity sea water deoxidation system pivot seal structure

Info

Publication number: CN213361083U
Application number: CN202021984261.9U
Authority: CN
Inventors: 张祥; 盛晨军
Original assignee: Bomesc Offshore Engineering Co Ltd
Current assignee: Bomesc Offshore Engineering Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-06-04
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses a FPSO hypergravity sea water deoxidation system pivot seal structure, including the static contact between end cover and casing sealed, the static contact between sealed clamp plate and the axle is sealed and the sliding seal structure between clamp plate and the end cover. In the sliding sealing structure, the pressure of a contact surface is provided by compressing the spring, the shaft end sealing gasket is in close contact with the end cover sealing gasket to form sealing, the rotating shaft is used for rotating to drive the centrifugal gravity block to rotate, centrifugal force is generated, and the centrifugal force is applied to the end sealing gasket and the end cover sealing gasket through the connecting rod mechanism to form larger pressing force, so that the sealing effect between the sealing gaskets when relative sliding is generated in the rotating process of the shaft is improved. In FPSO hypergravity sea water deoxidation system, the utility model discloses a can provide better sealed effect when the axle rotates.

Description

FPSO hypergravity sea water deoxidation system pivot seal structure

Technical Field

The utility model relates to a seal structure of mechanical system pivot especially relates to a FPSO hypergravity sea water deoxidation system pivot seal structure.

Background

In order to reduce the oxygen content of seawater in a pipeline, the oxygen content of the seawater needs to be reduced to a certain value, so that the service life of the pipeline is prolonged.

The traditional mechanical system sealing device is mature, but the sealing of the rotating shaft is unstable and the sealing effect is unstable in the rotating process of the shaft for the gas-liquid two-phase medium sealing of the hypergravity seawater deoxygenation system.

Disclosure of Invention

An object of the utility model is to overcome prior art's shortcoming, provide one kind and make the pivot in the course of the work, realize the contact pressure of the sealed contact surface of pad of automatic increase to reach the FPSO hypergravity sea water deoxidation system pivot seal structure of better sealed effect.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

a rotating shaft sealing structure of an FPSO super-gravity seawater deoxygenation system comprises a shell of the deoxygenation system, wherein an opening is formed in the top surface of the shell, an end cover is connected to the opening through a bolt, a rotating shaft penetrates through a middle hole in the middle of the end cover, a middle hole in the middle of a sealing gasket pressing plate and a middle hole in the middle of a locking ring sleeve in the vertical direction, a bottom wall groove is upwards formed in the middle of the bottom surface of the end cover, an end cover sealing gasket sleeved on the rotating shaft is installed in the bottom wall groove, the sealing gasket pressing plate comprises a disc, a boss is downwards arranged in the middle of the bottom surface of the disc, an annular wall groove is formed in the inner wall of the middle hole of the sealing gasket pressing plate in the circumferential direction, a sealing ring sleeved on the rotating shaft is installed in the annular wall groove, and a top surface groove is formed in the middle of the top surface of, the bottom wall of a cylindrical shaft end sealing gasket is arranged in a groove on the top surface and is sleeved on the rotating shaft, the annular top wall of the cylindrical shaft end sealing gasket is pressed on the bottom wall of the end cover sealing gasket, a spring and a spring supporting plate are sleeved on the rotating shaft between the boss and the locking ring sleeve, wherein the upper end and the lower end of the spring are respectively in direct contact with the boss and the spring supporting plate, and the bottom surface of the spring supporting plate is supported on the top wall of the locking ring sleeve for positioning;

two connecting seats are fixed on the outer side of the bottom wall of the disc, a first pin shaft is fixed on each connecting seat along the horizontal direction, the two connecting seats are symmetrically arranged about the central axis of the disc, each first pin shaft is rotatably connected with the upper end of a connecting rod, and a long circular hole is formed in the lower end of each connecting rod;

the lateral wall of locking ring cover on install two second axis pins that set up along the horizontal direction, two the second axis pin set up about the central axis symmetry of locking ring cover, two centrifugal gravity pieces constitute by centrifugal lever and balancing weight, centrifugal lever include montant and an down tube that sets up along vertical direction, the top and the montant top of down tube integrative setting, the crossing department of the down tube of each centrifugal gravity piece and montant rotates with first two axis pins respectively and is connected, every the bottom of down tube rotate with the third round pin axle of inserting in the slotted hole and link to each other, the third round pin axle can reciprocate in the slotted hole and be in the third round pin axle around both ends be connected with the nut respectively with the location, all be fixed with a balancing weight in the bottom of each montant.

The utility model has the advantages that:

through the rotation of axle, drive the epaxial centrifugal gravity piece of pivot and produce centrifugal inertial force, the rethread link mechanism is used centrifugal inertial force to the sealed pad of end cover and the axle head sealing gasket, increases the contact pressure between sealed pad to the realization provides better sealed effect at the axle rotation in-process.

Drawings

FIG. 1 is a schematic structural view of a sealing structure of a rotating shaft of the FPSO super-gravity seawater deoxygenation system of the present invention;

fig. 2 is a schematic diagram of the centrifugal gravity block of the structure shown in fig. 1.

Detailed Description

The present invention will be further described with reference to the following detailed description.

As shown in the attached drawing, the utility model discloses a FPSO hypergravity sea water deoxidation system pivot seal structure, casing 1 including deoxidation system the top surface of casing 1 be provided with the opening part have an end cover 2 through bolted connection, preferred casing 1 and the position of end cover opening inner wall contact be provided with sealing ring 4 with sealed. A rotating shaft 3 is arranged along the vertical direction and penetrates through a middle hole arranged in the middle of the end cover 2, a middle hole arranged in the middle of the sealing gasket pressing plate 8 and a middle hole arranged in the middle of the locking ring sleeve 10, a bottom wall groove is upwards formed in the middle of the bottom surface of the end cover 2, an end cover sealing gasket 6 sleeved on the rotating shaft 3 is arranged in the bottom wall groove, the sealing gasket pressing plate 8 comprises a disc, a boss is arranged downwards in the middle of the bottom surface of the disc, a ring wall groove is arranged on the inner wall of the middle hole of the sealing gasket pressing plate 8 along the circumferential direction, a sealing ring 5 sleeved on the rotating shaft 3 is arranged in the annular wall groove, a top surface groove is arranged in the middle of the top surface of the disc, the bottom wall of a cylindrical shaft end sealing gasket 7 is arranged in the top surface groove and sleeved on the rotating shaft 3, the annular top wall of the cylindrical shaft end sealing gasket 7 is pressed on the bottom wall of the end cover sealing gasket 6. The rotating shaft 3 between the boss and the locking ring sleeve 10 is sleeved with a spring 12 and a spring supporting plate 13, wherein the upper end and the lower end of the spring are respectively in direct contact with the boss and the spring supporting plate 13 without connection and fixation. The bottom surface of the spring supporting plate 13 is supported on the top wall of the locking ring sleeve 10 for positioning, so that the spring 12 presses the boss of the sealing pressure plate, and the shaft end sealing gasket 7 and the end cover sealing gasket 6 are seamlessly combined to form sealing.

Two connecting seats are fixed on the outer side of the bottom wall of the disc, a first pin shaft is fixed on each connecting seat in the horizontal direction, the two connecting seats are symmetrically arranged about the central axis of the disc, each first pin shaft is rotatably connected with the upper end of one connecting rod 9, and a long circular hole is formed in the lower end of each connecting rod 9.

The lateral wall of locking ring cover 10 on install two second axis pins that set up along the horizontal direction, two the second axis pin about the central axis symmetry setting of locking ring cover 10, two centrifugal gravity pieces 11 constitute by centrifugal lever 111 and balancing weight 112, centrifugal lever 111 include montant and an down tube that sets up along vertical direction, the top and the montant top of down tube set up integratively, the crossing department of the down tube of each centrifugal gravity piece 11 and montant rotates with first two axis pins respectively and is connected, every the bottom of down tube rotate with the third round pin axle of inserting in the slotted hole and link to each other, the third round pin axle can reciprocate in the slotted hole and be in the third round pin axle around both ends be connected with the nut respectively with the location. A counterweight 112 is fixed at the bottom of each vertical rod.

The working process and the principle of the device are as follows: when the rotating shaft 3 rotates, the shaft end sealing gasket 7 and the sealing pressure plate 8 rotate together with the rotating shaft 3, relative sliding is generated between the end cover sealing gasket 6 and the shaft end sealing gasket 7, and sealing is formed by pressing force. When the rotating shaft 3 rotates at a lower speed, the sealing gasket pressing plate 8 is pressed tightly through the spring 12, and then the end cover sealing gasket 6 and the shaft end sealing gasket 7 are pressed tightly to form sealing; when the rotating shaft 3 rotates at a higher working speed, the locking ring sleeve 10 drives the centrifugal gravity block 11 to rotate, the balancing weight 112 is far away from the rotating shaft under the action of centrifugal force and drives the centrifugal lever 111 to rotate, the connecting rod 9 is connected with the sealing pressure plate 8 and generates larger pressing force to the sealing pressure plate, and then the pressure between the shaft end sealing gasket 7 and the end cover sealing gasket 6 is increased, so that the sealing effect is improved. And the higher the shaft rotating speed is, the larger the centrifugal force generated by the balancing weight 112 is, the larger the pressure between the shaft end sealing gasket 7 and the end cover sealing gasket 6 is, and the stability of the sealing effect is ensured.

Claims

1. The utility model provides a FPSO hypergravity sea water deoxidation system pivot seal structure, includes deoxidation system's casing (1) the top surface of casing be provided with the opening part have end cover (2), its characterized in that through bolted connection: a rotating shaft (3) penetrates through a middle hole in the middle of the end cover, opens a middle hole in the middle of a sealing gasket pressing plate (8) and opens a middle hole in the middle of a locking ring sleeve (10) along the vertical direction, the middle of the bottom surface of the end cover is upwards opened with a bottom wall groove, the bottom wall groove is internally provided with an end cover sealing gasket (6) sleeved on the rotating shaft (3), the sealing gasket pressing plate comprises a disc, a boss is downwards arranged in the middle of the bottom surface of the disc, the inner wall of the middle hole of the sealing gasket pressing plate is opened with a ring wall groove along the circumferential direction, a sealing ring (5) sleeved on the rotating shaft is arranged in the ring wall groove, the middle of the top surface of the disc is opened with a top surface groove, the bottom wall of a cylindrical shaft end sealing gasket (7) is arranged in the top surface groove and sleeved on the rotating shaft, the annular top wall of the cylindrical shaft end sealing gasket (7) is pressed on the bottom wall of, a spring (12) and a spring supporting plate (13) are sleeved on the rotating shaft between the boss and the locking ring sleeve (10), wherein the upper end and the lower end of the spring are respectively in direct contact with the boss and the spring supporting plate (13), and the bottom surface of the spring supporting plate is supported on the top wall of the locking ring sleeve for positioning;

two connecting seats are fixed on the outer side of the bottom wall of the disc, a first pin shaft is fixed on each connecting seat along the horizontal direction, the two connecting seats are symmetrically arranged about the central axis of the disc, each first pin shaft is rotatably connected with the upper end of a connecting rod (9), and a long circular hole is formed in the lower end of each connecting rod;

the lateral wall of locking ring cover (10) on install two second axle pins that set up along the horizontal direction, two the second axle pin set up about the central axis symmetry of locking ring cover, two centrifugal gravity piece (11) constitute by centrifugal lever (111) and balancing weight (112), centrifugal lever include montant and an down tube that sets up along vertical direction, the top and the montant top of down tube set up integratively, the crossing department of the down tube of each centrifugal gravity piece and montant rotates with first two axle pins respectively and is connected, every the bottom of down tube rotate with the third round pin axle of inserting in the slotted hole and link to each other, third round pin axle can reciprocate in the slotted hole and be in the third round pin axle around both ends be connected with the nut respectively with the location, all be fixed with a balancing weight (112) in the bottom of each montant.