CN102022518B - Rack for marine self-elevating platform lock device and design method thereof - Google Patents
Rack for marine self-elevating platform lock device and design method thereof Download PDFInfo
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- CN102022518B CN102022518B CN2010106080139A CN201010608013A CN102022518B CN 102022518 B CN102022518 B CN 102022518B CN 2010106080139 A CN2010106080139 A CN 2010106080139A CN 201010608013 A CN201010608013 A CN 201010608013A CN 102022518 B CN102022518 B CN 102022518B
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Abstract
The invention provides a rack for a marine self-elevating platform lock device at sea and a design method thereof. The pitches for the rack teeth of a lock device are gradually decreased from top to bottom, and the lower tooth surface of each tooth is spherical. The scheme is adopted for the rack, thus solving the problem that the stress distribution of the rack tooth surfaces for legs is uneven under the condition of inconsistent load bearing of each rack for the legs and occurrence of the leg deflection in a locking state, improving the stress state of each rack tooth of the legs, and greatly prolonging the service life of the rack.
Description
Technical field
The present invention relates to the offshore drilling platform technical field, refer in particular to a kind of tooth bar and design method thereof that is used for marine jack-up unit locking device.
Background technique
At present in self-elevating drilling platform, particularly big, the abominable platform of operating environment of operating water depth has mostly used locking device, is used for when the platform standing state or during towage, the weight of platform is transferred on the locking device from lowering or hoisting gear.The locking device tooth bar is identical with spud leg tooth bar profile of tooth, thereby the contact between the two is face contact, has reduced the contact stress of the two greatly, helps improving the stress of spud leg tooth bar, improves its life-span.
But this locking device tooth bar has following deficiency: 1) platform spud leg when standing state generally is not to be in desirable plumbness, but deflection is arranged.Sometimes the locking device tooth bar can be fitted closely with the spud leg tooth bar, but deviation appears in the axis of the two sometimes, causes spud leg tooth bar local pressure excessive, causes excessive damage; 2) though the locking device tooth bar is identical with spud leg tooth bar profile of tooth; But because spud leg is different with locking device rigidity; The amount of deformation of each tooth of locking device tooth bar is different during locking state; The locking device tooth bar is also different with the load that each tooth of spud leg tooth bar bears, and the stressed of the tooth that when severe environmental conditions, has possibly surpass allowable load, causes the tooth bar damage.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing technology, provide a kind of when locking state the consistent locking device tooth bar and the design method thereof that are used for self-elevating drilling platform of the magnitude of load that each tooth bore of spud leg tooth bar.
For realizing above-mentioned purpose, technological scheme provided by the present invention is: a kind of tooth bar that is used for marine jack-up unit locking device, the pitch of described locking device rack tooth is successively decreased from top to bottom, and the Dedendum surface of each tooth is sphere.
The said adjacent teeth pitch ratio of successively decreasing is the 0.1%-1% of pitch of teeth.
Be rounding off between the Dedendum surface of said tooth, tooth root and the tooth top.
The centre of sphere of said Dedendum surface is positioned on the vertical line of tooth top and tooth root line mid point.
The 2-20 of the tooth depth that said Dedendum surface spherical radius is said tooth doubly.
Said tooth is 3 to 30.
The design method of accomplishing above-mentioned said locking device tooth bar may further comprise the steps:
1) the basic design condition of environmental conditions, platform that, is suitable for according to platform design is calculated the maximum vertical force F that acts on the locking device tooth bar
VAnd moment M;
2), utilize Machine Design software proposal plan locking device tooth bar Dedendum surface spherical geometry parameter, be that intersection point is made the straight line perpendicular to the former flank of tooth with the intersection point of the pitch line and the former flank of tooth, the centre of sphere is positioned on this straight line; Proposal plan spherical radius SR;
3), set up the FEM model of locking device tooth bar monodentate and spud leg tooth bar monodentate contact condition, the pressure that makes the two is F
V/ n, wherein, n is the locking device tooth bar number of teeth, and calculates contact stress, the 4th equivalent stress and locking device tooth bar radial-deformation;
4), regulate the Dedendum surface spherical radius, and repeatedly repeat the computational methods in the 2nd, 3 steps, make the allowable stress of surface of contact the 4th equivalent stress less than locking device tooth bar monodentate, spud leg rack material, obtain optimum spherical radius SR;
5), set up the FEM model of locking device tooth bar and spud leg tooth bar contact condition by number of actual teeth; By its locking state constraint locking device; And on the spud leg tooth bar, apply above-mentioned maximum vertical force and moment of flexure; Direction and actual direction are opposite, calculate load and amount of deformation that each tooth of locking device tooth bar bears;
6), the load calculated according to the 5th step and the pitch of amount of deformation adjustment locking device rack tooth, and repeatedly repeat the computational methods in the 5th step, the load that each tooth of locking device tooth bar is born is F
V/ n.
The present invention is after having adopted such scheme; Each tooth bar of spud leg carries inconsistent and the uneven problem of spud leg tooth bar flank of tooth stress distribution under the deflection situation appears in spud leg when having overcome locking state; Improve the stress of each tooth of spud leg tooth bar, prolonged its working life greatly.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention.
Fig. 2 is the enlarged diagram at the A place among Fig. 1.
Fig. 3 is a perspective view of the present invention.
Embodiment
Be described further with 3 couples of the present invention of accompanying drawing below in conjunction with accompanying drawing 1, preferred embodiment of the present invention is: the locking device tooth bar of the said self-elevating drilling platform of present embodiment is provided with 3 to 30 teeth 2 and is respectively h1 ~ hi; The pitch of h1 ~ hi is successively decreased from top to bottom, and the adjacent teeth 2 pitches ratio of successively decreasing is the 0.1%-1% of tooth 2 pitches.And the Dedendum surface of each tooth is sphere; Dedendum surface 3 spherical radius be said tooth 2 tooth depth 2-20 doubly.And be rounding off between the Dedendum surface 3 of tooth 2, tooth root 4 and the tooth top 5.
The design method of accomplishing above-mentioned said locking device tooth bar may further comprise the steps:
1), in the design initial of self-lifting pier; The shipowner claims to the possible environmental conditions of platform work capacity, operation in the future etc.; Can carry out platform on this basis and design basically, and calculate the maximum vertical force F that under most severe condition, acts on the locking device tooth bar
VAnd moment M; Then according to the number of teeth of design such as platform structure size locking device tooth bar.
2), utilize Machine Design software proposal plan locking device tooth bar Dedendum surface spherical geometry parameter, be that intersection point is made the straight line 5a perpendicular to former flank of tooth 4a with the intersection point of pitch line 3a and former flank of tooth 4a, the centre of sphere is positioned on this straight line 5a; Proposal plan spherical radius SR guarantees the rounding off of sphere and tooth top 1a, tooth root 2a and guarantees that tooth root 2a is not thinned.
3), set up the FEM model of locking device tooth bar monodentate and spud leg tooth bar monodentate contact condition, the pressure that makes the two is F
V/ n, wherein, n is the locking device tooth bar number of teeth, and calculates contact stress, the 4th equivalent stress and locking device tooth bar radial-deformation.
4), regulate the Dedendum surface spherical radius, and repeatedly repeat the computational methods in the 2nd, 3 steps, make the allowable stress of surface of contact the 4th equivalent stress less than locking device tooth bar monodentate, spud leg rack material, obtain optimum spherical radius SR.
5), set up the FEM model of locking device tooth bar and spud leg tooth bar contact condition by number of actual teeth; By its locking state constraint locking device; And on the spud leg tooth bar, apply above-mentioned maximum vertical force and moment of flexure; Direction and actual direction are opposite, calculate load and amount of deformation that each tooth of locking device tooth bar bears.
6), the load calculated according to the 5th step and the pitch of amount of deformation adjustment locking device rack tooth, and repeatedly repeat the computational methods in the 5th step, the load that each tooth of locking device tooth bar is born is F
V/ n.
Each tooth bar of spud leg carried inconsistent and the uneven problem of spud leg tooth bar flank of tooth stress distribution under the deflection situation appears in spud leg when the locking device tooth bar that adopts above-mentioned design method to produce had overcome locking state; Improve the stress of each tooth of spud leg tooth bar, prolonged its working life greatly.
The embodiment of the above only is the present invention's preferred embodiment, is not to limit practical range of the present invention with this, so the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (3)
1. tooth bar that is used for marine jack-up unit locking device, it is characterized in that: the pitch of described locking device rack tooth is successively decreased from top to bottom, and the Dedendum surface of each tooth is sphere; Adjacent teeth (2) the pitch ratio of successively decreasing is the 0.1%-1% of tooth (2) pitch; Be rounding off between the Dedendum surface (3) of said tooth (2), tooth root (4) and the tooth top (5); The centre of sphere of said Dedendum surface (3) is positioned on the vertical line of tooth top (5) and tooth root (4) line mid point; Said Dedendum surface (3) spherical radius be said tooth (2) tooth depth 2-20 doubly.
2. a kind of tooth bar that is used for marine jack-up unit locking device as claimed in claim 1 is characterized in that: said tooth (2) is 3 to 30.
3. design method that is used for the described locking device tooth bar of claim 1, it is characterized in that: the design method of this locking device tooth bar may further comprise the steps:
1) the basic design condition of environmental conditions, platform that, is suitable for according to platform design is calculated the maximum vertical force F that acts on the locking device tooth bar
VAnd moment M;
2), utilize Machine Design software proposal plan locking device tooth bar Dedendum surface spherical geometry parameter, be that intersection point is made the straight line perpendicular to the former flank of tooth with the intersection point of the pitch line and the former flank of tooth, the centre of sphere is positioned on this straight line; Proposal plan spherical radius SR;
3), set up the FEM model of locking device tooth bar monodentate and spud leg tooth bar monodentate contact condition, the pressure that makes the two is F
V/ n, wherein, n is the locking device tooth bar number of teeth, and calculates contact stress, the 4th equivalent stress and locking device tooth bar radial-deformation;
4), regulate the Dedendum surface spherical radius, and repeatedly repeat the computational methods in the 2nd, 3 steps, make the allowable stress of surface of contact the 4th equivalent stress less than locking device tooth bar monodentate, spud leg rack material, obtain optimum spherical radius SR;
5), set up the FEM model of locking device tooth bar and spud leg tooth bar contact condition by number of actual teeth; By its locking state constraint locking device; And on the spud leg tooth bar, apply above-mentioned maximum vertical force and moment of flexure; Direction and actual direction are opposite, calculate load and amount of deformation that each tooth of locking device tooth bar bears;
6), the load calculated according to the 5th step and the pitch of amount of deformation adjustment locking device rack tooth, and repeatedly repeat the computational methods in the 5th step, the load that each tooth of locking device tooth bar is born is F
V/ n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106080139A CN102022518B (en) | 2010-12-28 | 2010-12-28 | Rack for marine self-elevating platform lock device and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106080139A CN102022518B (en) | 2010-12-28 | 2010-12-28 | Rack for marine self-elevating platform lock device and design method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102022518A CN102022518A (en) | 2011-04-20 |
| CN102022518B true CN102022518B (en) | 2012-07-25 |
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| CN2010106080139A Active CN102022518B (en) | 2010-12-28 | 2010-12-28 | Rack for marine self-elevating platform lock device and design method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102996735B (en) * | 2011-09-15 | 2016-02-24 | 山东科瑞机械制造有限公司 | A kind of method improving jack-up unit gear rack lowering or hoisting gear bearing capacity |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3343371A (en) * | 1965-01-25 | 1967-09-26 | Mcdermott & Co Inc J Ray | Locking device for establishing a loadbearing joint between two structures |
| EP0024939A2 (en) * | 1979-08-29 | 1981-03-11 | Friede And Goldman Limited | A system for a jack-up rig unit for offshore use and a method of securing the support legs of such a unit |
| FR2560247A1 (en) * | 1984-02-28 | 1985-08-30 | Thomas Pierre Armand | Pillar, in particular leg of an oil rig with incorporated rack. |
| CN1259181A (en) * | 1997-06-26 | 2000-07-05 | 莱都诺股份有限公司 | Jack-up platform locking apparatus |
| CN201525488U (en) * | 2009-11-03 | 2010-07-14 | 上海振华重工(集团)股份有限公司 | Self-lifting type engineering platform locking device |
| CN201973207U (en) * | 2010-12-28 | 2011-09-14 | 中海油田服务股份有限公司 | Rack used in locking device of offshore jack-up drilling platform |
-
2010
- 2010-12-28 CN CN2010106080139A patent/CN102022518B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3343371A (en) * | 1965-01-25 | 1967-09-26 | Mcdermott & Co Inc J Ray | Locking device for establishing a loadbearing joint between two structures |
| EP0024939A2 (en) * | 1979-08-29 | 1981-03-11 | Friede And Goldman Limited | A system for a jack-up rig unit for offshore use and a method of securing the support legs of such a unit |
| FR2560247A1 (en) * | 1984-02-28 | 1985-08-30 | Thomas Pierre Armand | Pillar, in particular leg of an oil rig with incorporated rack. |
| CN1259181A (en) * | 1997-06-26 | 2000-07-05 | 莱都诺股份有限公司 | Jack-up platform locking apparatus |
| CN201525488U (en) * | 2009-11-03 | 2010-07-14 | 上海振华重工(集团)股份有限公司 | Self-lifting type engineering platform locking device |
| CN201973207U (en) * | 2010-12-28 | 2011-09-14 | 中海油田服务股份有限公司 | Rack used in locking device of offshore jack-up drilling platform |
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| Publication number | Publication date |
|---|---|
| CN102022518A (en) | 2011-04-20 |
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Address after: 101149 East Yanjiao Development Zone, Beijing (232 mailbox, Beijing) Patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: KEEN OFFSHORE ENGINEERING Co.,Ltd. Address before: 101149 East Yanjiao Development Zone, Beijing (232 mailbox, Beijing) Patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: GUANGDONG JINGYIN MACHINERY Co.,Ltd. Address after: 101149 East Yanjiao Development Zone, Beijing (232 mailbox, Beijing) Patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: GUANGDONG JINGYIN MACHINERY Co.,Ltd. Address before: 101149 East Yanjiao Development Zone, Beijing (232 mailbox, Beijing) Patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: FOSHAN JINGYIN MACHINERY Co.,Ltd. |