CN102071883A - Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling - Google Patents
Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling Download PDFInfo
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- CN102071883A CN102071883A CN2010105716128A CN201010571612A CN102071883A CN 102071883 A CN102071883 A CN 102071883A CN 2010105716128 A CN2010105716128 A CN 2010105716128A CN 201010571612 A CN201010571612 A CN 201010571612A CN 102071883 A CN102071883 A CN 102071883A
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- rotary module
- radome fairing
- cowling
- induced vibration
- stand pipe
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Abstract
The invention discloses an underwater stand pipe vortex induced vibration inhibiter adopting a rotatable cowling, belonging to the technical field of ocean stand pipe facility laying. In the invention, the rotatable cowling capable of changing own direction along with the current flow direction is installed on an underwater stand pipe and comprises a pair of rotating modules, a cowling fixing pad and a cowling. The inhibiter is characterized in that the front part of the cowling is round, the rear part of the cowling is pointed, the surface of the cowling is smooth, and the shape of the cowling is similar to a water drop. The circular arc part of the cowling is coaxial to the stand pipe and is connected with a main pipe by the rotating module which is convenient to install and disassemble to cause the circular arc part to freely rotate around the stand pipe. A small-density buoyant material is added in the hollow part of the cowling, and the structural deformation and pivoting friction resistance brought by the asymmetric gravity of the cowling can be eliminated. Because of effectively inhibiting vortex induced vibration, the underwater stand pipe vortex induced vibration inhibiter can improve the fatigue resistance of the underwater stand pipe, thus greatly lowering the engineering cost. Meanwhile, the inhibiter overcomes limitation on incoming flow directions by various vortex induced vibration inhibiters, and has high application value in the environments with frequently changed flow directions of oceans, rivers and the like.
Description
Technical field
The present invention relates to a kind of submerged riser vortex-induced vibration suppression device, particularly a kind of submerged riser vortex-induced vibration suppression device that adopts rotatable radome fairing belongs to marine riser facility laying technology field.
Background technology
The worsening shortages of oil supply makes the deep-sea oil gas exploitation be subjected to the countries in the world great attention.Numerous slim cylindrical construction things is arranged in the mining system of deep-sea, and as drilling water-separation pipe, production riser and suspended span transfer line etc., their total cost surpasses 50 percent of whole DSPS.When wave, ocean current are flowed through these pipelines, under certain flow velocity, can make the pipeline tail produce periodic vortex and come off, when the intrinsic frequency of pipeline and vortex shedding frequence near the time, just produced the whirlpool and swashed covibration, thereby caused the fatigue failure of standpipe.Pipeline swashs under the effect of resonance in the whirlpool that continues, and finally may produce tired broken ring, thereby have a strong impact on ocean operation, even bring serious engineering and environmental accident.Therefore, the research of deep-sea mining system pipeline vortex-induced vibration inhibition problem has seemed most important.
For reducing and preventing the destruction that vortex-induced vibration causes, increase the application life of off-shore pipeline, in operation, use vortex-induced vibration suppression device usually.Existing vortex-induced vibration suppression device mainly can be divided into and initiatively suppressing and passive inhibition two classes.Initiatively the inhibition technology is immediate development, thereby its principle is to add external energy to the flow field to reach the purpose that suppresses vortex shedding.And passive inhibition technology is meant by changing the pipeline outer shape or attachment device being installed being suppressed pipeline tail vortex shedding.Consider the complexity in flow field, deep-sea, the vortex-induced vibration of off-shore pipeline suppresses to be difficult to use initiatively inhibition technology, more should consider passive inhibition method.In the passive inhibition method, control lever, helical form striped, O type circle, protrusion of surface, separator disk and fixedly method such as radome fairing in some engineering occasions, be used for suppressing vortex-induced vibration.In the prior art, the patent No. is to use the fixedly radome fairing of streamlined structure to suppress vortex-induced vibration for the patent of invention that the US2007/0104542A1 name is called Fairing for a riser.By with the radome fairing circular arc portion over against coming flow path direction, its afterbody can obtain reasonable vortex-induced vibration and suppress effect back to coming flow path direction.When radome fairing cross section wake flow direction shape angle theta within the specific limits the time, its rejection mainly is subjected to radome fairing major diameter direction and comes the influence of the incoming flow angle α between the flow path direction.At incoming flow angle α not simultaneously, the inhibition effect of device may sharply reduce, even can increase the fluid force of pipeline, and this explanation radome fairing is very responsive to coming flow path direction, only the specific vortex-induced vibration that comes to produce on the flow path direction is had and suppresses effect preferably.Therefore, to the operating environment that water (flow) directions such as Yu Haiyang river change often, fixedly the application of radome fairing has significant limitation.
Summary of the invention
In order to overcome the deficiencies in the prior art and defective, the invention provides a kind of submerged riser vortex-induced vibration suppression device that manufactures and designs the rotatable radome fairing of employing that is not subjected to the incoming flow aspect effect simple, easy for installation.
For achieving the above object, the present invention adopts following technical scheme:
The rotatable radome fairing of the present invention is to be made of a pair of rotary module, radome fairing fixed bolster and radome fairing.Wherein rotary module comprises rotary module fixture, rotary module tumbler, roller and axial retention sheet.The rotary module fixture is made up of two semi-ring steel components of symmetry, and the internal diameter of rotary module fixture equals the standpipe outer diameter D, and interior external diameter thickness is got 0.12D to 0.14D, evenly is processed with the roller groove at its end face.The rotary module fixture is enclosed within on the standpipe from both sides, and uses bolt to be connected and fixed.The ball-type roller is positioned in the roller groove of rotary module fixture.The rotary module tumbler also is made up of two semi-ring steel components of symmetry, and the internal diameter of rotary module tumbler is slightly larger than the standpipe external diameter, and interior external diameter thickness is 0.15D to 0.2D, processing roller annular groove on its bottom surface.The axial retention sheet of right-angle structure, be installed in respectively on two semi-rings of rotary module tumbler, guarantee that rotary module installs back rotary module tumbler and can not move vertically, certain space is left in axial retention sheet and rotary module fixture bottom surface, to guarantee that rotation is not rubbed.The rotary module tumbler is enclosed within above the rotary module fixture, and its roller annular groove 8 just in time is placed on above the roller, uses bolt to connect between two semi-rings, and connecting back rotary module tumbler can freely rotate around the axis of standpipe.
Circle metacone before the profile of radome fairing, smooth surface is omited the shape as water droplet.Its cross section is met flow path direction and partly is circular arc, and wake flow direction part is extended one section afterbody that is used to mount and dismount along the circular arc tangential line smooth transition after intersect, intersecting.Radome fairing and radome fairing fixed bolster are installed in the rotary module outside together, and each radome fairing is installed a rotary module respectively in two ends up and down.Connect with bolton respectively between the rotary module at two ends and the radome fairing, the radome fairing circular arc portion is coaxial with standpipe.
If the submerged riser draw ratio is very big, can every a segment distance the described vortex-induced vibration suppression device of multistage be installed thereon, the length of every section described radome fairing is got 4D to 8D.
Beneficial effect of the present invention: 1, radome fairing adopts airflow design, and this kind structure can effectively suppress vortex-induced vibration, thereby reduces the adverse effect of failure modes such as fatigue that vortex-induced vibration causes, fracture to ocean operation.But 2, owing to use free rotation mode that radome fairing is installed; can make this device change direction with flow direction; effectively solve and suppress the defective that effect is come the flow path direction restriction, can adapt to the abyssal environment that the flow direction frequently changes, therefore increased the scope of application on engineering.3, apparatus of the present invention only need a pair of rotary module is installed on standpipe at a certain distance, put streamlined radome fairing again, and manufacturing is installed simple and convenient, and construction technology realizes that more easily the complex structure degree is within tolerance interval.
Description of drawings
Fig. 1 is apparatus of the present invention perspective view
Fig. 2 is apparatus of the present invention radome fairing generalized section
Fig. 3 is apparatus of the present invention rotary module perspective view
Fig. 4 is apparatus of the present invention rotary module fixture end face schematic diagram
Fig. 5 is apparatus of the present invention rotary module tumbler schematic bottom view
Among the figure:
1. standpipe; 2. rotary module fixture; 3. rotary module tumbler; 4. axial retention sheet; 5. radome fairing fixed bolster; 6. radome fairing; 7. fixture roller groove; 8. tumbler roller annular groove; 9. bolt; 10. roller.
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, the present invention includes a pair of rotary module, radome fairing fixed bolster 5 and radome fairing 6.
Wherein rotary module comprises rotary module fixture 2, rotary module tumbler 3, roller 10 and axial retention sheet 4.Rotary module fixture 2 is made up of two semi-ring steel components of symmetry, and the internal diameter of rotary module fixture 2 equals standpipe 1 outer diameter D, and external diameter thickness is got 0.12D to 0.14D in it, evenly is processed with roller groove 7 at its end face.Rotary module fixture 2 is enclosed within on the standpipe 1 from both sides, and uses bolt 9 to be connected and fixed.Roller 10 diameters are 0.5 to 0.8 times of external diameter thickness in the rotary module fixture 2, and roller 10 is positioned over 7 li of each roller grooves of rotary module fixture 2.Rotary module tumbler 3 also is made up of two semi-ring steel components of symmetry, and rotary module tumbler 3 internal diameters are slightly larger than standpipe 1 external diameter, is not rubbed to guarantee to rotate, and interior external diameter thickness is 0.15D to 0.2D, processing roller annular groove 8 on its bottom surface.The axial retention sheet 4 of right-angle structure, be installed in respectively on two semi-rings of rotary module tumbler 3, it can guarantee that rotary module installs back rotary module tumbler 3 and can not move vertically, but axial retention sheet 4 leaves certain space with rotary module fixture 2 bottom surfaces, to guarantee that rotation is not rubbed.Rotary module tumbler 3 is enclosed within above the rotary module fixture 2, and its roller annular groove 8 just in time is placed on above the roller 10, uses bolt 9 to connect between two semi-rings, and connecting back rotary module tumbler 3 can freely rotate around the axis of standpipe 1.
Circle metacone before the profile of radome fairing 6, smooth surface is omited the shape as water droplet.Its cross section is met flow path direction and partly is circular arc, and wake flow direction part is extended one section afterbody that is used to mount and dismount along the circular arc tangential line smooth transition after intersect, intersecting.Radome fairing 6 and radome fairing fixed bolster 5 are installed in the rotary module outside together, and each radome fairing is installed a rotary module respectively in two ends about in the of 6.Be fastenedly connected with bolt 9 respectively between the rotary module at two ends and the radome fairing 6.The circular arc portion of radome fairing 6 is coaxial with standpipe 1, and freely rotates around standpipe 1 axis by rotary module.Radome fairing 6 cross section circular arc part internal diameters equal rotary module tumbler 3 external diameters, and thickness is 0.02D to 0.05D, and cross section wake flow direction shape angle theta is 75 ° to 30 °, and tail length L is 0.2D to 0.4D.
When coming flow path direction to change, under the effect of surperficial pressure at both sides difference, by the rotation of rotary module, radome fairing 6 with automatic stabilisation in two equilbrium positions.Thereby change incoming flow angle α, make vortex-induced vibration suppress to remain at one preferably in the scope.Through experimental verification, when radome fairing 6 reached balance, incoming flow angle α depended on the shape angle theta to a great extent, and the shape angle theta is more little, and α is also more little for the incoming flow angle.Experimental result shows that when the shape angle theta guaranteed in 75 ° to 30 ° scopes, equal resistance and pulsation lift reached about 30% to 60% respectively when this device can reduce standpipe 1, and effectively reduced the vortex-induced vibration amplitude.
If submerged riser 1 draw ratio is very big, can every a segment distance the described vortex-induced vibration suppression device of multistage be installed thereon, the length of every section described radome fairing 6 is got 4D to 8D.
Claims (3)
1. submerged riser vortex-induced vibration suppression device that adopts rotatable radome fairing, comprise: a pair of rotary module, radome fairing fixed bolster (5), radome fairing (6) is characterized in that rotary module comprises rotary module fixture (2), rotary module tumbler (3), roller (10) and axial retention sheet (4); Rotary module fixture (2) is made up of two semi-ring steel components of symmetry, evenly is processed with roller groove (7) at its end face; Rotary module fixture (2) is enclosed within on the standpipe (1) from both sides, and uses bolt (9) to be connected and fixed; Roller (10) is positioned in the roller groove (7) of rotary module fixture (2); Rotary module tumbler (3) also is made up of two semi-ring steel components of symmetry, processing roller annular groove (8) on its bottom surface; The axial retention sheet (4) of right-angle structure is installed in respectively on two semi-rings of rotary module tumbler (3); Rotary module tumbler (3) is enclosed within above the rotary module fixture (2), and its roller annular groove (8) just in time is placed on above the roller (10), uses bolt (9) to connect between two semi-rings; Circle metacone before radome fairing (6) profile, smooth surface is omited the shape as water droplet; Cross section is met flow path direction and partly is circular arc, and wake flow direction part is extended a segment trailer along the circular arc tangential line smooth transition after intersect, intersecting; Radome fairing (6) and radome fairing fixed bolster (5) are installed in the rotary module outside together, and each radome fairing (6) two ends is up and down installed a rotary module respectively; Use bolt (9) to be fastenedly connected between the rotary module at two ends and the radome fairing (6) respectively, radome fairing (6) circular arc portion is coaxial with standpipe.
2. the submerged riser vortex-induced vibration suppression device of the rotatable radome fairing of employing according to claim 1 is characterized in that described rotary module fixture (2) internal diameter equals standpipe (1) outer diameter D, and interior external diameter thickness is got 0.12D to 0.14D; Rotary module tumbler (3) internal diameter is slightly larger than standpipe (1) external diameter, and interior external diameter thickness is 0.15D to 0.2D; Roller (10) diameter is 0.5 to 0.8 times of the interior external diameter thickness of rotary module fixture (2).
3. the submerged riser vortex-induced vibration suppression device of the rotatable radome fairing of employing according to claim 1, it is characterized in that described radome fairing (6) cross section circular arc part internal diameter equals rotary module tumbler (3) external diameter, wall thickness is got 0.02D to 0.05D, cross section wake flow direction shape angle theta is 75 ° to 30 °, and tail length L is 0.2D to 0.4D.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105716128A CN102071883A (en) | 2010-12-03 | 2010-12-03 | Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling |
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| CN2010105716128A CN102071883A (en) | 2010-12-03 | 2010-12-03 | Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865044A (en) * | 2012-10-11 | 2013-01-09 | 江苏科技大学 | Imitated aerofoil adaptive vortex-induced vibration suppression and resistance reduction device for underwater riser |
| CN102943634A (en) * | 2012-11-16 | 2013-02-27 | 西南石油大学 | Free-rotation impeller device for inhibiting eddy induced vibration of marine riser |
| CN103291538A (en) * | 2013-06-21 | 2013-09-11 | 湘电风能有限公司 | Flow guide device and wind driven generator with same |
| CN103604020A (en) * | 2013-11-13 | 2014-02-26 | 青岛迪玛尔海洋工程有限公司 | Pipeline vortex-induced vibration fairing |
| CN104747098A (en) * | 2015-02-14 | 2015-07-01 | 中国石油大学(华东) | Marine riser vortex-induced vibration suppression device |
| CN104790881A (en) * | 2015-02-14 | 2015-07-22 | 中国石油大学(华东) | Marine riser vortex-induced vibration abatement device |
| CN105178617A (en) * | 2015-09-23 | 2015-12-23 | 中国石油集团海洋工程（青岛）有限公司 | Vortex-induced vibration inhibiting device for constructing large jacket |
| CN105201420A (en) * | 2015-10-13 | 2015-12-30 | 西南石油大学 | Active vortex-induced vibration suppression device |
| CN105247160A (en) * | 2013-04-12 | 2016-01-13 | 挪威国家石油公司 | Fairing |
| CN103748311B (en) * | 2011-06-14 | 2016-06-29 | 越洋塞科外汇合营有限公司 | Integrated marine riser trousers |
| CN106917591A (en) * | 2016-04-01 | 2017-07-04 | 山东科技大学 | A kind of Puffer type active driving device for standpipe vortex-induced vibration |
| CN111306148A (en) * | 2020-03-09 | 2020-06-19 | 中国海洋石油集团有限公司 | Marine riser vortex-induced vibration suppression device |
| CN112523267A (en) * | 2021-02-04 | 2021-03-19 | 中国空气动力研究与发展中心计算空气动力研究所 | Damping self-adaptive fairing device for underwater pile vortex-induced suppression |
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| US4078605A (en) * | 1977-02-25 | 1978-03-14 | Cameron Iron Works, Inc. | Riser pipe string |
| US4398487A (en) * | 1981-06-26 | 1983-08-16 | Exxon Production Research Co. | Fairing for elongated elements |
| US5410979A (en) * | 1994-02-28 | 1995-05-02 | Shell Oil Company | Small fixed teardrop fairings for vortex induced vibration suppression |
| US7070361B2 (en) * | 2003-03-06 | 2006-07-04 | Shell Oil Company | Apparatus and methods for providing VIV suppression to a riser system comprising umbilical elements |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103748311B (en) * | 2011-06-14 | 2016-06-29 | 越洋塞科外汇合营有限公司 | Integrated marine riser trousers |
| CN102865044B (en) * | 2012-10-11 | 2015-03-04 | 江苏科技大学 | Imitated aerofoil adaptive vortex-induced vibration suppression and resistance reduction device for underwater riser |
| CN102865044A (en) * | 2012-10-11 | 2013-01-09 | 江苏科技大学 | Imitated aerofoil adaptive vortex-induced vibration suppression and resistance reduction device for underwater riser |
| CN102943634A (en) * | 2012-11-16 | 2013-02-27 | 西南石油大学 | Free-rotation impeller device for inhibiting eddy induced vibration of marine riser |
| CN105247160A (en) * | 2013-04-12 | 2016-01-13 | 挪威国家石油公司 | Fairing |
| CN103291538A (en) * | 2013-06-21 | 2013-09-11 | 湘电风能有限公司 | Flow guide device and wind driven generator with same |
| CN103604020A (en) * | 2013-11-13 | 2014-02-26 | 青岛迪玛尔海洋工程有限公司 | Pipeline vortex-induced vibration fairing |
| CN104747098A (en) * | 2015-02-14 | 2015-07-01 | 中国石油大学(华东) | Marine riser vortex-induced vibration suppression device |
| CN104790881A (en) * | 2015-02-14 | 2015-07-22 | 中国石油大学(华东) | Marine riser vortex-induced vibration abatement device |
| CN104747098B (en) * | 2015-02-14 | 2016-01-06 | 中国石油大学(华东) | A kind of vortex-induced vibration of marine riser restraining device |
| CN104790881B (en) * | 2015-02-14 | 2016-01-06 | 中国石油大学(华东) | A kind of vortex-induced vibration of marine riser restraining device |
| CN105178617A (en) * | 2015-09-23 | 2015-12-23 | 中国石油集团海洋工程（青岛）有限公司 | Vortex-induced vibration inhibiting device for constructing large jacket |
| CN105201420A (en) * | 2015-10-13 | 2015-12-30 | 西南石油大学 | Active vortex-induced vibration suppression device |
| CN105201420B (en) * | 2015-10-13 | 2017-03-22 | 西南石油大学 | Active vortex-induced vibration suppression device |
| CN106917591A (en) * | 2016-04-01 | 2017-07-04 | 山东科技大学 | A kind of Puffer type active driving device for standpipe vortex-induced vibration |
| CN106917591B (en) * | 2016-04-01 | 2019-03-26 | 山东科技大学 | A kind of Puffer type active driving device for standpipe vortex-induced vibration |
| CN111306148A (en) * | 2020-03-09 | 2020-06-19 | 中国海洋石油集团有限公司 | Marine riser vortex-induced vibration suppression device |
| CN112523267A (en) * | 2021-02-04 | 2021-03-19 | 中国空气动力研究与发展中心计算空气动力研究所 | Damping self-adaptive fairing device for underwater pile vortex-induced suppression |
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Application publication date: 20110525 |