CN212319088U - Large-caliber ultralow-temperature dynamic rotary sealing joint - Google Patents
Large-caliber ultralow-temperature dynamic rotary sealing joint Download PDFInfo
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- CN212319088U CN212319088U CN202020750849.1U CN202020750849U CN212319088U CN 212319088 U CN212319088 U CN 212319088U CN 202020750849 U CN202020750849 U CN 202020750849U CN 212319088 U CN212319088 U CN 212319088U
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Abstract
The utility model discloses a large-caliber ultralow-temperature dynamic rotary sealing joint, which comprises an inner ring flange, an inner ring, an outer ring flange, balls, an isolating ring, a replaceable slideway and a medium flow blocking ring; the inner ring flange is fixed on the inner ring through bolts, and a fluid medium seal and a nitrogen seal are arranged between the inner ring flange and the inner ring; an outer ring flange is fixed on the outer ring through bolts, and nitrogen gas seal is arranged between the outer ring flange and the outer ring; the inner ring and the outer ring are respectively provided with a slideway fixing groove, and the replaceable slideway is arranged in the slideway fixing groove to form a moving slideway of the ball; the ball is arranged in the replaceable slideway; the inner ring and the outer ring are both provided with medium flow blocking rings; a seal is arranged between the outer ring and the inner ring flange to prevent dust and moisture from entering; the inner and outer ring flanges are respectively provided with a leakage detection port for dynamic and static main sealing; the inner ring flange and the outer ring are provided with nitrogen purging channels, and a nitrogen purging loop is formed by the flow of nitrogen between the inner ring cavity and the slideway. The invention improves the reliability of the joint.
Description
Technical Field
The utility model belongs to the core component field of LNG loading and unloading arm, especially a heavy-calibre ultra-low temperature dynamic rotary seal connects.
Background
At present, medium conveying, loading and unloading between an LNG ship and a storage area are mainly realized through a large-caliber loading and unloading arm, the loading and unloading arm is required to realize rotation with multiple degrees of freedom in the conveying process, a rotary joint is a key part for realizing multi-degree-of-freedom combination, and the rotary joint is required to adapt to the working conditions of an LNG ultralow-temperature environment and rotary dynamic sealing and prevent leakage of low-temperature fluid.
The structure of the rotary joint essentially determines the bearing capacity and the service performance of the rotary joint, and Chinese patent CN103104767A discloses a special rotary joint for ultralow temperature, wherein the nitrogen purging channel structure of the joint is complex, the balls are arranged on a steel ball roller way between an outer ring and an inner ring, the balls in the rotary joint rub against each other to easily cause movement blockage, and meanwhile, the long-time work easily causes serious abrasion of the roller way between the inner ring and the outer ring, and the service life is reduced; under the condition of low temperature, the cold deformation of the roller path is large, and the balls are easy to block, so that the movement condition of the balls is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a heavy-calibre ultra-low temperature developments rotary seal connects to realize the inside aqueous vapor replacement of raceway, the nitrogen lubrication of ball and main seal circle's protecting against shock, improve the reliability that connects the use.
Realize the utility model discloses the technical solution of purpose does:
a large-caliber ultralow-temperature dynamic rotary sealing joint comprises an inner ring flange, an inner ring, an outer ring flange, balls, a replaceable slideway, a first medium flow blocking ring and a second medium flow blocking ring;
the inner ring flange is fixedly connected to the upper end of the inner ring, and a static sealing device is arranged between the contact end surface of the inner ring flange and the inner ring; the outer ring is sleeved outside the inner ring, an annular slideway fixing groove is formed between the outer ring and the inner ring, and a plurality of replacement type slideways are fixed in the slideway fixing grooves of the outer ring and the inner ring and arranged in the annular slideway formed by the two replacement type slideways; a dynamic water-gas sealing device is arranged between the contact end surfaces of the outer ring and the inner ring flange; the outer ring flange is fixedly connected to the lower end of the outer ring; a static sealing device is also arranged between the contact end surfaces of the outer ring flange and the outer ring; a dynamic sealing device is arranged between the contact end surfaces of the outer ring flange and the inner ring; the first medium flow blocking ring and the second medium flow blocking ring are respectively in close fit with the inner walls of the inner ring flange and the outer ring flange and are respectively used for blocking mounting grooves of the first static sealing device and the second static sealing device; the inner ring flange is provided with a first gas port, and the outer ring is provided with a second gas port; an annular cavity is arranged in the inner ring; the first gas port, the gap between the outer ring and the inner ring of the annular cavity and the second gas port are communicated to form a gas purging loop.
Compared with the prior art, the utility model, it is showing the advantage and is:
(1) the joint of the utility model can realize the water-gas replacement in the roller path and the nitrogen lubrication of the ball; the inner and outer ring flanges are provided with the flow blocking ring, so that the impact of a fluid medium on the sealing device is reduced, the sealing performance of the sealing device is improved, and the service life of the sealing device is prolonged.
(2) The spacer rings are arranged between the balls, so that collision and friction between the adjacent balls are avoided, effectiveness and flexibility of rotation of the rotary joint are guaranteed, and the service life of the rotary joint is prolonged.
(3) The rotary joint is provided with the replaceable slideway, so that the structural performance of the slideway is guaranteed, and the replaceability can reduce the maintenance cost and the maintenance time of the rotary joint.
Drawings
Fig. 1 is a cross-sectional view of the rotary joint of the present invention.
Fig. 2 is a sectional view of the isolating ring and the schematic view of the installation of the isolating ring and the balls.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
The utility model discloses a large-caliber ultralow-temperature dynamic rotary sealing joint, which comprises an inner ring flange 1, an inner ring 8, an outer ring 9, an outer ring flange 18, balls 11, a replaceable slideway 10, a first medium flow blocking ring 4 and a second medium flow blocking ring 17;
the inner ring flange 1 is fixedly connected to the upper end of the inner ring 8 through a bolt 3, and a first static sealing device 5 and a second static sealing device 6 are arranged between the contact end surfaces of the inner ring flange 1 and the inner ring 8; the first static sealing device 5 is close to the inner side of the contact end face and used for sealing a medium, and the second static sealing device 6 is close to the outer side of the contact end face and used for sealing a gap between the inner ring 8 and the outer ring 9 by nitrogen; the outer ring 9 is sleeved outside the inner ring 8, an annular slideway fixing groove is formed between the outer ring 9 and the inner ring 8, replacement type slideways 10 are fixed in the slideway fixing grooves of the outer ring 9 and the inner ring 8, and the two replacement type slideways 10 with semicircular cross sections form an annular slideway with a circular cross section; a plurality of balls 11 are arranged in a circular slideway formed by the two replacement type slideways 10; the outer ring 9 can slide relative to the inner ring 8, so that the function of dynamic rotation of the rotary joint is realized; the corresponding structural mechanical property of the replaceable slideway 10 is superior to that of the inner ring 8 and the outer ring 9, and the replaceable slideway has better wear resistance, so that the service life of the inner ring and the outer ring of the rotary joint and the use reliability of the rotary joint are ensured, and the maintenance cost and time of the rotary joint can be reduced; the ball bearing 11 is arranged in the replaceable slideway 10 and forms a rotating system with the inner ring 8 and the outer ring 9; a dynamic water vapor sealing device 7 is arranged between the contact end surfaces of the outer ring 9 and the inner ring flange 1, so that water vapor and dust can be prevented from entering a gap between the outer ring 9 and the inner ring flange 1; the outer ring flange 18 is fixedly connected to the lower end of the outer ring 9 through a bolt 14; a third static sealing device 12 is arranged between the contact end surfaces of the outer ring flange 18 and the outer ring 9; a first dynamic sealing device 13 and a second dynamic sealing device 16 are arranged between the contact end surfaces of the outer ring flange 18 and the inner ring 8; the first dynamic sealing device 13 is embedded into the end face of the inner ring 8, and the second dynamic sealing device 16 is embedded into the outer ring flange 18; the first medium flow blocking ring 4 and the second medium flow blocking ring 17 are respectively installed in a close fit mode with the inner walls of the inner ring flange 1 and the outer ring flange 18, the first medium flow blocking ring 4 is used for blocking an installation groove of the first static sealing device 5, so that impact damage of fluid medium to the first static sealing device 5 is avoided, and the service life of the first static sealing device 5 is prolonged; the second medium flow blocking ring 17 is used for blocking an installation groove of the second dynamic sealing device 16, so that impact damage of fluid medium to the second dynamic sealing device 16 is avoided, and the service life of the second dynamic sealing device 16 is prolonged; a first gas port 20 is formed in the inner ring flange 1, and a second gas port 19 is formed in the outer ring 9; an annular cavity 80 is arranged in the inner ring 8; a first air passage 81 and a second air passage 82 are arranged in the inner ring 8 and are respectively used for communicating the first air port 20 with the annular cavity 80 and the gap between the outer ring 9 and the inner ring 8 with the annular cavity 80; the outer ring 9 is provided with a third air passage 83 for communicating a gap between the outer ring 9 and the inner ring 8 with the second air port 19; the first gas port 20, the annular cavity 80, the gap between the outer ring 9 and the inner ring 8 and the second gas port 19 form a gas purging loop, so that water gas replacement and gas lubrication of the balls in the slide way 10 are realized.
Furthermore, a spacer ring 21 is arranged between the balls 11 to prevent mutual friction and motion locking between the balls, and ensure the motion flexibility of the rotary joint.
Furthermore, the two ends of the isolating ring 21 are provided with grooves matched with the balls 11, the balls 11 can be wrapped in the grooves, and vent holes are formed between the grooves.
Further, a first medium leakage detection port 2 is further formed in the inner ring flange 1, and the first medium leakage detection port 2 is communicated with contact end faces between the inner ring flange 1 and the inner ring 8 and is used for detecting whether a fluid medium leaks between the inner ring flange 1 and the inner ring 8.
Further, a second medium leakage detection port 15 is further formed in the outer ring flange 18, and the second medium leakage detection port 15 is communicated with a contact end face between the outer ring flange 18 and the inner ring 8 and is used for detecting whether a fluid medium leaks between the outer ring flange 18 and the inner ring 8.
The rotary sealing joint can be used for LNG loading and unloading arms with the size of 16 inches or more, a nitrogen purging loop of the whole rotary sealing joint is formed through sealing devices such as sealing rings for sealing, and during working, a nitrogen gas supply device inputs nitrogen gas into the gas purging loop through a first gas port 20 to ensure that the nitrogen purging loop is filled with nitrogen gas and then is discharged through a second gas port 19 to take away water vapor in the gas purging loop. On-line detection sensing devices can be arranged at the first medium leakage detection port 2 and the second medium leakage detection port 15, so that the leakage condition of the rotary joint can be detected in real time in the use process of the rotary joint, and the dynamic density effect and the confirmation of the replacement period of the rotary joint can be analyzed in time. When in use, the second gas port 19 can be used as a gas inlet gas purging inlet, and the first gas port 20 can be used as a gas outlet gas purging outlet. When the fluid medium leaks, the first gas port 20 and the second gas port 19 are closed at the same time, and the pipe joints provided in the first medium leakage detection port 2 and the second medium leakage detection port 15 are opened to discharge the fluid medium from the pipe joints.
Claims (10)
1. A large-caliber ultralow-temperature dynamic rotary sealing joint comprises an inner ring flange (1), an inner ring (8), an outer ring (9), an outer ring flange (18) and balls (11), and is characterized by further comprising a replaceable slideway (10), a first medium flow blocking ring (4) and a second medium flow blocking ring (17);
the inner ring flange (1) is fixedly connected to the upper end of the inner ring (8), and a static sealing device is arranged between the contact end surfaces of the inner ring flange (1) and the inner ring (8); the outer ring (9) is sleeved outside the inner ring (8), an annular slideway fixing groove is formed between the outer ring (9) and the inner ring (8), replacement type slideways (10) are fixed in the slideway fixing grooves of the outer ring (9) and the inner ring (8), and a plurality of balls (11) are arranged in the annular slideway formed by the two replacement type slideways (10); a dynamic water-gas sealing device (7) is arranged between the contact end surfaces of the outer ring (9) and the inner ring flange (1); the outer ring flange (18) is fixedly connected to the lower end of the outer ring (9); a static sealing device is also arranged between the contact end surfaces of the outer ring flange (18) and the outer ring (9); a dynamic sealing device is arranged between the contact end surfaces of the outer ring flange (18) and the inner ring (8); the first medium flow blocking ring (4) and the second medium flow blocking ring (17) are respectively in tight fit with the inner walls of the inner ring flange (1) and the outer ring flange (18), and the first medium flow blocking ring (4) and the second medium flow blocking ring (17) are respectively used for blocking mounting grooves of the first static sealing device (5) and the second dynamic sealing device (16); a first gas port (20) is formed in the inner ring flange (1), and a second gas port (19) is formed in the outer ring (9); an annular cavity (80) is arranged in the inner ring (8); the first gas port (20), the gap between the outer ring (9) and the inner ring (8) of the annular cavity (80) and the second gas port (19) are communicated to form a gas purging loop.
2. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: and the inner ring flange (1) is also provided with a first medium leakage detection port (2).
3. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: and a second medium leakage detection port (15) is also arranged on the outer ring flange (18).
4. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: the inner ring flange (1) is fixedly connected to the upper end of the inner ring (8) through bolts.
5. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: the outer ring flange (18) is fixedly connected to the lower end of the outer ring (9) through bolts.
6. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: and a spacer ring (21) is arranged between the balls (11).
7. The large caliber ultra-low temperature dynamic rotary seal joint of claim 6, wherein: the two ends of the isolating ring (21) are concave, the ball (11) can be wrapped in the isolating ring, and a through hole is formed in the middle of the isolating ring (21).
8. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: the static sealing device between the contact end surfaces of the inner ring flange (1) and the inner ring (8) comprises a first static sealing device (5) and a second static sealing device (6); the first static sealing device (5) is used for sealing a medium, and the second static sealing device (6) is used for sealing a gap between the inner ring (8) and the outer ring (9) in a gas mode.
9. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: the first gas port (20) serves as a gas purge inlet and the second gas port (19) serves as a gas purge outlet.
10. The large caliber ultra-low temperature dynamic rotary seal joint of claim 1, wherein: the first gas port (20) serves as a gas purge outlet and the second gas port (19) serves as a gas purge inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020750849.1U CN212319088U (en) | 2020-05-09 | 2020-05-09 | Large-caliber ultralow-temperature dynamic rotary sealing joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020750849.1U CN212319088U (en) | 2020-05-09 | 2020-05-09 | Large-caliber ultralow-temperature dynamic rotary sealing joint |
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| Publication Number | Publication Date |
|---|---|
| CN212319088U true CN212319088U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020750849.1U Active CN212319088U (en) | 2020-05-09 | 2020-05-09 | Large-caliber ultralow-temperature dynamic rotary sealing joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550625A (en) * | 2020-05-09 | 2020-08-18 | 中国船舶重工集团公司第七一六研究所 | Large-caliber ultralow-temperature dynamic rotary sealing joint |
-
2020
- 2020-05-09 CN CN202020750849.1U patent/CN212319088U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550625A (en) * | 2020-05-09 | 2020-08-18 | 中国船舶重工集团公司第七一六研究所 | Large-caliber ultralow-temperature dynamic rotary sealing joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JARI AUTOMATION Co.,Ltd. CHINA Assignor: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. Contract record no.: X2020980007928 Denomination of utility model: A large diameter super low temperature dynamic rotary sealing joint Granted publication date: 20210108 License type: Exclusive License Record date: 20201116 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 222061 No.18, Shenghu Road, Lianyungang City, Jiangsu Province Patentee after: The 716th Research Institute of China Shipbuilding Corporation Address before: 222061 No.18, Shenghu Road, Lianyungang City, Jiangsu Province Patentee before: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
|
| CP01 | Change in the name or title of a patent holder |