CN113266640B - Main bearing system for single-column mooring production system - Google Patents
Main bearing system for single-column mooring production system Download PDFInfo
- Publication number
- CN113266640B CN113266640B CN202110480410.0A CN202110480410A CN113266640B CN 113266640 B CN113266640 B CN 113266640B CN 202110480410 A CN202110480410 A CN 202110480410A CN 113266640 B CN113266640 B CN 113266640B
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- CN
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- Prior art keywords
- bearing
- stud
- stator
- nut
- rotor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/50—Other types of ball or roller bearings
- F16C19/505—Other types of ball or roller bearings with the diameter of the rolling elements of one row differing from the diameter of those of another row
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
Abstract
The invention relates to the technical field of petroleum engineering, in particular to a main bearing system for a single-column mooring production system, which has a simple structure and is convenient to replace and maintain, and comprises a bearing stud, a lock nut, a slewing bearing, a stator and a rotor; the outer ring of the rotary support bearing is fixedly connected with the rotor through the bearing stud and the locking nut, the inner ring of the rotary support bearing is fixedly connected with the stator through the bearing stud and the locking nut, the stator is fixedly connected with the center column, the stator and the ground are relatively static, the rotor rotates 360 degrees around the stator, the structure is simple, the rotary precision is high, and meanwhile, the bearing stud is convenient to disassemble and assemble, and the stator is easy to replace and maintain.
Description
Technical Field
The invention relates to the technical field of petroleum engineering, in particular to a main bearing system for a single-column mooring production system.
Background
The Bohai sea area has a plurality of small marginal oil fields, huge total reserves, and has the characteristics of geological oil reservoirs such as structural breaking, fracture development, complex oil reservoirs and the like, and has large development uncertainty and unsuitable and excessively high engineering investment. Because the flexible risers cannot accommodate very shallow waters with water depths below 50 meters (flexible risers need to maintain a specific shape of design to avoid overloads, which is not easily achieved with shallow waters), the floating production storage and offloading FPSO (FloatingProduction StorageandOffloading) cannot be positioned using conventional catenary mooring systems, to fully exploit small marginal fields, reduce the overall life cycle costs of drilling, workover, construction, installation, production, operation and maintenance by simplifying the platform design, and improve engineering benefits, enabling economic exploitation of such small marginal fields. A single column mooring system was developed from this design. The design and development of the main bearing system is particularly important as a core component of a single column mooring system. The existing main bearing system is complex in structure and difficult to replace and maintain.
Disclosure of Invention
The main bearing system for the single-column mooring production system is simple in structure and convenient to replace and maintain.
The technical scheme adopted for solving the technical problems is as follows:
the main bearing system for the single-column mooring production system comprises a bearing stud, a lock nut, a slewing bearing, a stator and a rotor; the outer ring of the rotary support bearing is fixedly connected with the rotor through the bearing stud and the locking nut, the inner ring of the rotary support bearing is fixedly connected with the stator through the bearing stud and the locking nut, the stator is fixedly connected with the center column, the stator and the ground are relatively static, the rotor rotates 360 degrees around the stator, the structure is simple, the rotary precision is high, and meanwhile, the bearing stud is convenient to disassemble and assemble, and the stator is easy to replace and maintain.
Further, the slewing bearing adopts three rows of roller bearings capable of bearing axial load, overturning moment and radial load at the same time.
Furthermore, the axis of the slewing bearing is horizontally provided with two groups of rollers a for bearing axial load and overturning moment, the axis of the slewing bearing is vertically provided with a group of rollers b capable of bearing radial load, and the bearing can bear large load, and can rotate and repeatedly rotate.
Furthermore, the main bearing system further comprises a core-supplementing nut, the core-supplementing nut is arranged at the other end of the bearing stud relative to the locking nut, the external thread of the core-supplementing nut is fixedly connected with the stator and the rotor, and the other end of the bearing stud relative to the locking nut is arranged in the core-supplementing nut, so that the fixing of the core-supplementing nut is facilitated, the dismounting of the bearing stud is facilitated, the contact area (thread and bottom surface) between the bearing stud and the stator and the rotor is increased, and the stress is reduced.
Furthermore, the main bearing system for the single-column mooring production system further comprises a waterproof cover plate assembly, wherein the waterproof cover plate assembly is arranged above the slewing support bearing and is used for separating the bearing from the external environment, protecting the bearing, fastening pieces attached to the surface of the bearing, supporting the contact surface of a casting and the like.
Further, the periphery of the rotor is connected with a plurality of cantilevers, preferably four cantilevers, which are connected with the turntable through the cantilevers, and the cantilevers are used for providing support for the turntable and the hose tower so that the turntable and the hose tower rotate together with the rotor around the center column.
Compared with the prior art, the main bearing system for the single-column mooring production system is connected with the FPSO floating oil storage ship through the soft rigid arm system, and the mooring force of the FPSO is transmitted to the central tower through the soft rigid arm system, so that the FPSO rotates 360 degrees around the central tower under the action of wind, waves and ocean currents. The principle of a wind vane is adopted, so that the FPSO or other marine facilities are positioned in the downwind concurrent flow position, the stress condition of the system is improved, and the stress of the FPSO or other marine facilities is minimized, thereby ensuring that the FPSO or other marine facilities can continuously operate on the sea for a long time, and can bear vertical load, radial load, overturning moment and the like generated by mooring the FPSO; the whole structure is reasonable in design and convenient to operate and maintain.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a top view of the present invention;
fig. 3 is an enlarged view of a partial structure of the present invention.
In the figure, a waterproof cover plate assembly 1, a bearing stud 2, a lock nut 3, a slewing bearing 4, a stator 5, a bushing nut 6, a rotor 7, a center column 8, a roller a9, a roller b10, a soft rigid arm 11, a cantilever 12 and a flange 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings of the specification.
Example 1:
the main bearing system for the single-column mooring production system comprises a waterproof cover plate assembly 1, a bearing stud 2, a lock nut 3, a slewing bearing 4, a stator 5, a bushing nut 6 and a rotor 7.
The rotary support bearing 4 adopts three rows of roller bearings, two groups of rollers a9 are horizontally arranged on the axis, one group of rollers b10 are vertically arranged on the axis, the three rows of roller bearings can bear axial load, overturning moment and radial load at the same time, wherein the axial load and the overturning moment are borne by the two groups of rollers a9 horizontally arranged on the axis, the radial load is borne by the group of rollers b10 vertically arranged on the axis, the bearing can bear large load, can rotate and repeatedly rotate, and the like, and has higher rotary precision.
The rotor 7 is fixed with the outer ring of the slewing bearing 4 and rotates around the stator 5; the rotor 7 adopts a V-shaped structure and is fixedly connected with the soft rigid arm 11. The V-shaped structure is adopted, so that the positioning contact area is large, the contact inequality caused by stress or other reasons is avoided, and the axial load and the radial load can be borne simultaneously.
The periphery of the rotor 7 is connected with four cantilevers 12, and the rotor 7 is connected with the turntable through the four cantilevers 12, and the turntable and the hose tower are supported by the four cantilevers 12 so as to rotate together with the rotor 7 around the central column 8. The cantilever 12 adopts the flange 13 with the tang with the revolving stage junction, adopts this mode, and firstly, convenient to detach, installation location, secondly, two flange lock bolts only bear axial force, and tang part bears the moment of torsion.
The stator 5, the stator 5 is connected with the inner ring of the support bearing 4, and the stator 5 is fixedly connected with the upper part and the lower part of the center column 8, so that the stator is relatively static with the ground.
The bearing stud 2 adopts a stud or a stud, and the bottom of the stator 5 and the bottom of the rotor 7 are small in disassembly and assembly space, and the embodiment adopts a stud structure, so that the replacement and the maintenance are more convenient.
And the lock nuts 3 are used for respectively connecting and fixing the stator 5 and the rotor 7 with the slewing bearing 4.
The core-supplementing nut 6 improves the strength of a connecting thread with the bearing stud 2, the external thread of the core-supplementing nut is fixed with the stator 5 and the rotor 7, the internal thread of the core-supplementing nut is connected with the other end of the bearing stud 2 relative to the lock nut 3 by threads, and the core-supplementing nut 6 is convenient to fix and disassemble the bearing stud 2; and secondly, the contact area (screw thread and bottom surface) between the stator and the rotor is increased, and the stress is reduced.
The waterproof cover plate assembly 1 separates the bearing from the external environment, protects the bearing, a fastening system attached to the surface of the bearing, supports the contact surface of a casting and the like, and is convenient for sealing, maintenance and replacement by adopting the structure.
The main bearing system is used as a core component of a single-column mooring system, and has the main function of being connected with an FPSO floating oil storage ship through a soft rigid arm system, so that the mooring force of the FPSO is transmitted to a central tower through the soft rigid arm system, and the FPSO rotates 360 degrees around the central tower under the action of wind, waves and ocean currents. The principle of the wind vane is adopted, so that the FPSO or other marine facilities are positioned in the downwind concurrent flow position, the stress condition of the system is improved, and the stress of the FPSO or other marine facilities is minimized, thereby ensuring that the FPSO or other marine facilities can continuously operate on the sea for a long time, and bearing the vertical load, the radial load, the overturning moment and the like generated by mooring the FPSO.
The foregoing embodiments are merely examples of the present invention, and the scope of the present invention includes, but is not limited to, the forms and styles of the foregoing embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present invention, shall fall within the scope of the present invention.
Claims (5)
1. The main bearing system for the single-column mooring production system is characterized in that: the device comprises a bearing stud, a lock nut, a slewing bearing, a stator and a rotor; the outer ring of the rotary support bearing is fixedly connected with the rotor through a bearing stud and a locking nut, the inner ring of the rotary support bearing is fixedly connected with the stator through a bearing stud and a locking nut, and the stator is fixedly connected with the center column; the main bearing system further comprises a core-supplementing nut, wherein the core-supplementing nut is arranged at the other end of the bearing stud relative to the locking nut, an external thread of the core-supplementing nut is fixedly connected with the stator and the rotor, and the other end of the bearing stud relative to the locking nut is arranged in the core-supplementing nut; the periphery of the rotor is connected with the cantilever and is connected with the turntable through the cantilever; the joint of the cantilever and the turntable adopts a flange with a spigot, and the flange with the spigot is adopted, so that the disassembly, the installation and the positioning are convenient, and the two flange locking bolts only bear axial force, and the spigot part bears torque;
the slewing bearing adopts three rows of roller bearings capable of bearing axial load, overturning moment and radial load simultaneously;
the axis of the slewing bearing is horizontally provided with two groups of rollers a used for bearing axial load and overturning moment, and the axis of the slewing bearing is vertically provided with one group of rollers b capable of bearing radial load.
2. The main bearing system for a single column mooring production system according to claim 1, wherein: the bearing stud is a double-end stud.
3. The main bearing system for a single column mooring production system according to claim 1, wherein: the bearing stud is a single-head stud.
4. A main bearing system for a single column mooring production system according to claim 3, wherein: and the internal thread of the bushing nut is in threaded connection with the other end of the bearing stud relative to the locking nut.
5. The main bearing system for a single column mooring production system according to claim 1, wherein: the water-proof cover plate assembly is arranged above the slewing bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110480410.0A CN113266640B (en) | 2021-04-30 | 2021-04-30 | Main bearing system for single-column mooring production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110480410.0A CN113266640B (en) | 2021-04-30 | 2021-04-30 | Main bearing system for single-column mooring production system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113266640A CN113266640A (en) | 2021-08-17 |
| CN113266640B true CN113266640B (en) | 2023-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110480410.0A Active CN113266640B (en) | 2021-04-30 | 2021-04-30 | Main bearing system for single-column mooring production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113266640B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1889779A1 (en) * | 2006-08-15 | 2008-02-20 | Bluewater Energy Services B.V. | Roller bearing system for mounting a turret in a vessel |
| CN205401445U (en) * | 2016-03-03 | 2016-07-27 | 中国港湾工程有限责任公司 | Slewing main bearing of single -point mooring system |
| US10183727B1 (en) * | 2017-10-04 | 2019-01-22 | Sofec, Inc. | In-situ turret bearing repair and assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8002472B2 (en) * | 2008-06-30 | 2011-08-23 | Nucor Corporation | Slew bearing system |
| PT2145819E (en) * | 2008-07-17 | 2012-08-22 | Bluewater Energy Services Bv | Mooring assembly |
| US10538291B2 (en) * | 2017-11-15 | 2020-01-21 | Sofec, Inc. | In situ turret bearing remediation and assembly |
-
2021
- 2021-04-30 CN CN202110480410.0A patent/CN113266640B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1889779A1 (en) * | 2006-08-15 | 2008-02-20 | Bluewater Energy Services B.V. | Roller bearing system for mounting a turret in a vessel |
| CN205401445U (en) * | 2016-03-03 | 2016-07-27 | 中国港湾工程有限责任公司 | Slewing main bearing of single -point mooring system |
| US10183727B1 (en) * | 2017-10-04 | 2019-01-22 | Sofec, Inc. | In-situ turret bearing repair and assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113266640A (en) | 2021-08-17 |
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