CN221323651U - Novel rotary sealing structure of fluid rotary joint - Google Patents
Novel rotary sealing structure of fluid rotary joint Download PDFInfo
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- CN221323651U CN221323651U CN202322758274.4U CN202322758274U CN221323651U CN 221323651 U CN221323651 U CN 221323651U CN 202322758274 U CN202322758274 U CN 202322758274U CN 221323651 U CN221323651 U CN 221323651U
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- 238000007789 sealing Methods 0.000 title claims abstract description 50
- 239000012530 fluid Substances 0.000 title claims abstract description 44
- 238000003825 pressing Methods 0.000 claims abstract description 41
- 238000012856 packing Methods 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims description 14
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model discloses a novel rotary sealing structure of a fluid rotary joint, which belongs to the field of ocean engineering mooring, and comprises the following components: a novel rotary seal structure of a fluid rotary joint, comprising: the rotary sealing device comprises an upper rotary cavity, a lower fixed cavity, a pressing sleeve bearing, a lower fixed cavity bearing, packing fillers and sealing rings, wherein the lower fixed cavity is fixed with the pressing sleeve, the pressing sleeve bearing and the lower fixed cavity bearing are both arranged between the pressing sleeve and the upper rotary cavity, and the upper rotary cavity and the lower fixed cavity can do relative rotary motion around the same axis. The H-shaped upper and lower cavity structure adopted by the utility model enlarges the selectable range of the sealing space and the sealing mode, and the double sealing mode with packing sealing as the main and sealing rings as the auxiliary is more effective than the single sealing ring sealing.
Description
Technical Field
The utility model relates to the field of ocean engineering mooring, in particular to a novel rotary sealing structure of a fluid rotary joint.
Background
The FPSO, i.e. the floating production oil storage and discharge device, is an important component of a marine oil and gas development system, and is used for completing the exploitation of underwater petroleum together with an underwater oil extraction device and a shuttle cruise ship. To improve the stability of the FPSO when in operation, the FPSO is often used in conjunction with a single point mooring system. The single point mooring system mainly comprises pontoons, pile leg members, mooring ropes, oil hoses and fluid rotary joints. The fluid rotary joint is used as a key component of a single-point mooring system, is a conversion device for connecting various fluid channels of a static part and a rotary part, and can transmit fluid, electric power and signals.
In single point mooring systems, fluid swivel devices pass through high temperature, high pressure and corrosive media, and in addition to meeting the stability of the device operation during media transport, it should be ensured that leakage cannot be caused by dynamic seal failure of the swivel. In the prior art, the sealing space of the fluid rotary joint of the single-point mooring system is insufficient, the sealing mode is limited, the fluid rotary joint is often sealed by adopting a single sealing ring, the difficulty of rotary sealing is greatly increased due to single sealing condition, and the sealing failure problem is serious.
Disclosure of Invention
The utility model aims to solve the problems of limited sealing mode and poor sealing reliability of the conventional fluid rotary joint, and discloses a novel rotary sealing structure of the fluid rotary joint, which is characterized by comprising the following components: the rotary sealing device comprises an upper rotary cavity, a lower fixed cavity, a pressing sleeve bearing, a lower fixed cavity bearing, packing fillers and sealing rings, wherein the lower fixed cavity is fixed with the pressing sleeve, the pressing sleeve bearing and the lower fixed cavity bearing are both arranged between the pressing sleeve and the upper rotary cavity, and the upper rotary cavity and the lower fixed cavity can do relative rotary motion around the same axis.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, a gap is reserved between the upper rotary cavity and the pressing sleeve, the packing filler is arranged in the gap between the upper rotary cavity and the pressing sleeve, and the sealing ring is in an annular structure and is sleeved at the butt joint position of the upper rotary cavity and the lower fixed cavity.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, the upper rotary cavity includes: the upper oil storage cavity is provided with an upper oil delivery pipe, and the middle oil delivery pipe is provided with a first annular bulge and a second annular bulge.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, the outer wall of the first annular protrusion is connected with the press sleeve bearing inner ring, and the second annular protrusion is connected with the lower fixed cavity bearing inner ring.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, the pressing sleeve is of a thin-wall cylinder structure with a stepped inner wall, the pressing sleeve wraps the pressing sleeve bearing, and the packing filler and the lower fixed cavity bearing are arranged on the pressing sleeve.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, the packing filler is in an annular structure and is sleeved on the outer wall of the middle oil delivery pipe.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, an annular groove is formed in the lower bottom surface of the lower fixed cavity, and an oil delivery hole concentric with the middle oil delivery pipe is formed in the lower bottom surface of the annular groove.
Preferably, in the novel rotary sealing structure of a fluid rotary joint, the lower fixing cavity is provided with a lower oil delivery pipe.
The utility model achieves the following technical effects:
1) The middle oil delivery pipe is communicated with the upper oil storage cavity and the lower fixed cavity, the upper cavity and the lower cavity are in an I shape, and high-temperature and high-pressure fluid enters the fluid rotary joint to be subjected to secondary buffering, so that the rotary sealing difficulty is effectively reduced, and the working stability of the fluid rotary joint is improved.
2) The packing soft material in the packing seal is compressed by the clamping force generated by the gravity of the upper oil storage cavity and the pressing sleeve to generate deformation; the outer wall of the middle oil delivery pipe is microscopically uneven and generates a labyrinth effect after being attached to the packing, so that the medium throttling is sealed; in addition, the butt joint of the middle oil delivery pipe and the lower part fixing cavity adopts a plurality of sealing rings for dynamic sealing, so that the rotary sealing performance of the fluid rotary joint is further improved.
3) The upper bottom surface of the lower part fixed cavity is provided with the annular groove which can compensate the displacement generated when the pressing sleeve moves downwards, and plays a role in fixing the pressing sleeve, the pressing sleeve has a holding effect on the middle oil delivery pipe, the stability of the fluid rotary joint can be obviously improved, the working condition that the middle oil delivery pipe is stressed complex when the fluid rotary joint works in severe sea areas and deep sea environments and is easy to fatigue and damage is improved, the stability of a system is improved, and the service life of the fluid rotary joint is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a fluid rotary joint;
FIG. 2 is a front view of the upper rotating chamber;
FIG. 3 is a schematic view of the structure of the press jacket;
FIG. 4 is a partial block diagram of a fluid rotary joint;
Reference numerals illustrate:
The oil pipe comprises a 1-upper rotating cavity, a 11-upper oil storage cavity, a 12-middle oil conveying pipe, a 121-first annular bulge, a 122-second annular bulge, a 2-upper oil conveying pipe, a 3-press sleeve bearing, a 4-press sleeve, a 41-press sleeve first step, a 42-press sleeve second step, a 43-press sleeve third step, a 44-press sleeve fourth step, a 5-packing filler, a 6-lower fixed cavity bearing, a 7-sealing ring, an 8-lower fixed cavity, an 81-annular groove and a 9-lower oil conveying pipe.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, the rotary seal structure of the fluid rotary joint of the present utility model includes: the upper rotary cavity 1, the lower fixed cavity 8, the pressing sleeve 4, the pressing sleeve bearing 3, the lower fixed cavity bearing 6, the packing filler 5 and the sealing ring 7, the lower fixed cavity 8 and the pressing sleeve 4 are fixed, the pressing sleeve bearing 3 and the lower fixed cavity bearing 6 are arranged between the pressing sleeve 4 and the upper rotary cavity 1, the upper rotary cavity 1 and the lower fixed cavity 8 can do relative rotary motion around the same axis, a gap is reserved between the upper rotary cavity 1 and the pressing sleeve 4, the packing filler 5 is arranged in the gap between the upper rotary cavity 1 and the pressing sleeve 4, and the sealing ring 7 is of an annular structure and is sleeved at the joint of the upper rotary cavity 1 and the lower fixed cavity 8;
The upper rotary chamber 1 includes: the upper oil storage cavity 11 and the middle oil delivery pipe 12 are of a T-shaped structure, the upper oil storage cavity 11 is connected with the middle oil delivery pipe 12 and the upper oil delivery pipe 2, and the T-shaped structure of the upper rotary cavity 1 can play roles in oil storage and buffering when a fluid medium flows through the upper oil storage cavity 11 from the middle oil delivery pipe 12;
The middle oil delivery pipe 12 is in an I-shaped structure, the middle oil delivery pipe 12 is provided with a first annular bulge 121 and a second annular bulge 122, the outer wall of the first annular bulge 121 is matched with the inner ring of the press sleeve bearing 3, and the outer wall 122 of the second annular bulge is matched with the inner ring of the lower fixed cavity bearing 6;
The lower fixed cavity 8 is of a cylindrical cavity structure with the same diameter as the upper oil storage cavity 11, and a fluid medium flows through the lower fixed cavity 8 from the lower oil delivery pipe 9 to enter the middle oil delivery pipe 12, so that the lower fixed cavity 8 has the oil storage and buffering functions;
The upper bottom surface of the lower fixed cavity 8 is provided with a groove 81 in a ring shape, the lower bottom surface of the annular groove 81 is provided with an oil through hole, the annular groove 81 can compensate the displacement generated when the pressing sleeve moves downwards under the bearing, and the function of fixing the pressing sleeve 4 is achieved;
the sealing ring sleeve 7 is arranged at the joint of the middle oil delivery pipe 12 and the oil through hole at the upper bottom surface of the lower fixed cavity 8, and 3 sealing rings are adopted for sealing, so that the leakage of fluid can be prevented when the fluid flows through the middle oil delivery pipe 12 through the lower fixed cavity 8;
The inner wall of the pressing sleeve 4 is of a stepped thin-wall cylinder structure, wherein the inner wall of a first step 41 of the pressing sleeve is connected with the outer ring of the pressing sleeve bearing 3, the inner wall of a second step 42 of the pressing sleeve is in clearance fit with the outer wall of the middle oil delivery pipe 12, packing filler 5 is arranged in a gap between the inner wall of a third step 43 of the pressing sleeve and the outer wall of the middle oil delivery pipe 12, the inner wall of a fourth step 44 of the pressing sleeve is connected with the outer ring of the lower fixed cavity bearing 6, the outer wall of the fourth step 44 of the pressing sleeve is in interference fit with the inner wall of the annular groove 81, and in the process of inputting a fluid medium from the lower oil delivery pipe 9 and outputting the fluid medium from the upper oil delivery pipe 2, the upper rotary cavity 1 can be ensured to relatively rotate around the same axis with respect to the lower fixed cavity 8;
the packing 5 is made of materials including: the packing filler 5 is sleeved at a gap between the outer wall of the middle oil delivery pipe 12 and the pressing sleeve 4, the outer wall of the middle oil delivery pipe 12 is uneven in microcosmic, the pressing sleeve 4 bears the gravity of the upper oil storage cavity 11, and a labyrinth effect is generated after the packing filler 5 is attached to the packing sleeve 4, so that further leakage of fluid due to sealing failure leakage of the sealing ring 7 can be further prevented.
The utility model and its embodiments have been described above, which description is not intended to be limiting. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an implementation case similar to the technical solution are not creatively designed without departing from the inventive concept of the present utility model, and all the structural manners and implementation cases shall fall into the protection scope of the present utility model.
Claims (6)
1. A novel rotary seal structure of a fluid rotary joint, comprising: the upper portion rotatory cavity (1), fixed cavity in lower part (8), press cover (4), press cover bearing (3), fixed cavity in lower part bearing (6), packing filler (5) and sealing washer (7), rotatory cavity in upper portion (1) include: upper portion oil storage chamber (11) and middle oil pipe (12), upper portion oil storage chamber (11) are equipped with upper portion oil pipe (2), middle oil pipe (12) are equipped with first annular arch (121) and second annular arch (122), upper portion rotatory cavity (1) with leave the clearance between pressing cover (4), packing filler (5) are located in upper portion rotatory cavity (1) with press in the clearance between cover (4), sealing washer (7) are annular structure and cover and locate upper portion rotatory cavity (1) with fixed cavity of lower part (8) butt joint department, fixed cavity of lower part (8) with press cover (4) fixed, press cover bearing (3) with fixed cavity of lower part bearing (6) all are located press cover (4) with between upper portion rotatory cavity (1), upper portion rotatory cavity (1) with fixed cavity of lower part (8) can make relative motion around same axis of revolution.
2. The novel rotary sealing structure of the fluid rotary joint according to claim 1, wherein the outer wall of the first annular protrusion (121) is connected with the inner ring of the pressure sleeve bearing (3), and the second annular protrusion (122) is connected with the inner ring of the lower fixed cavity bearing (6).
3. The novel rotary sealing structure of the fluid rotary joint according to claim 1, wherein the pressing sleeve (4) is of a thin-wall cylinder structure with a stepped inner wall, the pressing sleeve (4) wraps the pressing sleeve bearing (3), and the packing filler (5) and the lower fixed cavity bearing (6) are arranged on the pressing sleeve bearing.
4. The novel rotary sealing structure of the fluid rotary joint according to claim 1, wherein the packing filler (5) is in an annular structure and sleeved on the outer wall of the middle oil delivery pipe (12).
5. The novel rotary sealing structure of the fluid rotary joint according to claim 1, wherein an annular groove (81) is formed in the lower bottom surface of the lower fixed cavity (8), and an oil through hole concentric with the middle oil delivery pipe (12) is formed in the lower bottom surface of the annular groove (81).
6. A novel rotary seal structure of a fluid rotary joint according to claim 1, characterized in that the lower stationary cavity (8) is provided with a lower oil delivery pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322758274.4U CN221323651U (en) | 2023-10-16 | 2023-10-16 | Novel rotary sealing structure of fluid rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322758274.4U CN221323651U (en) | 2023-10-16 | 2023-10-16 | Novel rotary sealing structure of fluid rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221323651U true CN221323651U (en) | 2024-07-12 |
Family
ID=91808784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322758274.4U Active CN221323651U (en) | 2023-10-16 | 2023-10-16 | Novel rotary sealing structure of fluid rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221323651U (en) |
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2023
- 2023-10-16 CN CN202322758274.4U patent/CN221323651U/en active Active
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