CN104879280A - Tower drum doorframe gradually varied in thickness - Google Patents
Tower drum doorframe gradually varied in thickness Download PDFInfo
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- CN104879280A CN104879280A CN201510243159.0A CN201510243159A CN104879280A CN 104879280 A CN104879280 A CN 104879280A CN 201510243159 A CN201510243159 A CN 201510243159A CN 104879280 A CN104879280 A CN 104879280A
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Abstract
The invention relates to a tower drum doorframe gradually varied in thickness. The tower drum doorframe gradually varied in thickness is shaped through integrated forging or casting, of a ring structure, and formed by sequentially connecting the doorframe upper end, the doorframe lower end and the arc doorframe middle together, and a smooth transition is adopted among the doorframe upper end, the doorframe lower end and the doorframe middle. The outer side wall of the tower drum doorframe gradually varied in thickness is connected with the side wall of a tower drum door opening. The outer wall of the tower drum doorframe gradually varied in thickness is of the same radian as the outer wall of a tower drum, and another smooth transition is adopted between the inner wall of the tower drum doorframe gradually varied in thickness and the inner wall of the tower drum. The thickness of the inner side wall of the tower drum doorframe is larger than the thickness of the outer side wall of the tower drum doorframe, and the tower drum doorframe gradually varied in thickness and the walls of the tower drum are connected through full penetration butt welding seams. Compared with annular reinforced doorframes usually used at present, the full penetration butt welding seams are used to connect the tower drum doorframe gradually varied in thickness with the walls of tower drum, stress concentration on the connecting welding seams is reduced, fatigue stress amplitude of the welding seams is reduced, fatigue resistance of the welding seams after being ground flush is high, and simultaneously the tower drum doorframe gradually varied in thickness can prevent the walls of the tower drum at the bottom of the tower drum doorframe gradually varied in thickness from being thickened, reduces welding quantity and welding deformation of the welding seams between the walls of the bottom tower drum, among the walls of the tower drum and the tower drum doorframe gradually varied in thickness, and among the walls of the tower drum and a flange at the bottom of the tower drum, improves economical efficiency of the tower drum, and reduces transportation difficulty. The tower drum doorframe gradually varied in thickness nearly has no effect on low order self-vibration characteristics of a wind turbine generator tower.
Description
Technical field
The invention belongs to wind power tower drum technical field of structures, be specifically related to a kind of gradient thickness type tower cylinder doorframe.
Background technique
Wind power generation stepped common be tower barrel structure 1,2 to be connected with basis bottom it, generator 3 and wind wheel 4 are installed in top, and the tower cylinder internal placement confession cat ladder of upper and lower traffic and the cable etc. of electric energy transmitting, therefore need perforate to arrange door opening 5 bottom tower cylinder.Tower cylinder 1 weakens the influence by perforate often to be needed to take reinforcement measure to strengthen, and the reinforcement of common tower cylinder 1 adopts annular stiffened plate 6, and annular stiffened plate 6 adopts the T-shaped solder design 8 of full-penetration with barrel.Because T-shaped weld seam 8 place stress is concentrated comparatively greatly, allowed that Fatigue Stress Amplitude is lower, usual employing increases door opening 5 region wall thickness to reduce maximum stress and Fatigue Stress Amplitude, and it is concentrated to alleviate the suddenly change stress that causes of wall thickness that the thinner barrel do not thickeied compared with thickness bucket wall and top that door opening 5 region thickeies arranges certain compensation grade 11.
The measure of annular stiffened plate 6 and thickening bottom barrel thereof causes bottom column cylinder weight greatly to increase, increases tower cylinder 1 hoisting difficulty, less economical; In addition, due to the increase of wall thickness, cause weld seam 10 between bottom column cylinder barrel, weld seam 8 between barrel and annular stiffened plate, between barrel and end flange, weld seam 9 welding capacity increases greatly, the welding heat therefore caused and welding deformation increase, and add weld industry difficulty.And the compensation grade 11 arranged between the thinner barrel do not thickeied compared with thickness bucket wall and top that thickeies of door opening 5 region is also difficult to avoid stress herein to concentrate completely, causes structural damage easily to occur herein.
Summary of the invention
The object of the present invention is to provide a kind of gradient thickness type tower cylinder doorframe.
The present invention proposes a kind of gradient thickness type tower cylinder doorframe, described doorframe adopts solid forging or casting, structure in the form of a ring, one is connected to form successively by the middle part of doorframe upper end, doorframe and doorframe lower end, the space of ring-type doorframe inside forms door opening, described doorframe upper end and doorframe lower end curved, be straight line or camber line in the middle part of doorframe, in the middle part of doorframe upper end and doorframe, joint adopts and seamlessly transits, and in the middle part of doorframe lower end and doorframe, joint adopts and seamlessly transits; Described ring-type doorframe outer side wall is connected with tower cylinder door opening sidewall, described ring-type doorframe outer wall and the same radian of tower drum outer wall, and described ring-type doorframe inwall and tower cylinder inwall adopt and seamlessly transit; The thickness of described doorframe madial wall is thick compared with the thickness of doorframe outer side wall, offers the weakening of door opening to tower cylinder strength and stiffness to make up.
In the present invention, described doorframe upper end and doorframe lower end curve, adopt any one in circular arc, elliptic arc or other high order curves according to actual conditions.
In the present invention, described gradient thickness type tower cylinder doorframe adopts full-penetration butt weld to be connected with tower cylinder barrel.
The technology of the present invention principle makes up door opening weakening to tower cylinder strength and stiffness by doorframe thickness by being thinned to thick smooth gradual change when not thickening bottom column cylinder, and adopt full-penetration butt weld to connect doorframe and barrel, greatly reduce rolled steel dosage and welding capacity, the stress alleviating doorframe and barrel joint is concentrated, improve the fatigue problem of doorframe weld seam, and bottom column barrel thickness does not increase the problem of stress concentration that it also avoid upper and lower tower cylinder joint.
Beneficial effect of the present invention is:
1. provide a kind of gradient thickness type tower cylinder doorframe, doorframe and tower cylinder weld seam are full-penetration butt weld, and the stress reducing this attachment weld place is concentrated, and reduces its Fatigue Stress Amplitude, polishes rear anti-fatigue performance high.
2. gradient thickness type tower cylinder doorframe can avoid the wall thickness thickening bottom column cylinder, reduce welding capacity and the welding deformation of weld seam between bottom column cylinder barrel, between barrel and doorframe, between barrel and end flange, improve the Economy of tower cylinder, reduce transport difficulty.
3. adopt gradient thickness type tower cylinder doorframe to carry out reinforcement to wind power generation stepped door opening almost not affect wind power generation stepped low order self-vibration characteristic own.
Accompanying drawing explanation
Fig. 1 is wind power generation stepped side view;
Fig. 2 is that annular is put more energy into doorframe plan view;
Fig. 3 is the side view of Fig. 2;
Fig. 4 is the plan view of Fig. 2;
Fig. 5 is gradient thickness type tower cylinder doorframe plan view;
Fig. 6 is the side view of Fig. 5;
Fig. 7 is the plan view of Fig. 5;
Fig. 8 is the three-dimensional plan view of gradient thickness type tower cylinder doorframe.
Number in the figure: 1 is tower cylinder, based on 2, 3 is generator, 4 is wind wheel, 5 is door opening, 6 is annular stiffened plate, 7 is barrel, 8 is barrel and the T-shaped weld seam of annular stiffened plate, 9 is barrel and end seam flange, 10 is weld seam between barrel, 11 is compensation grade between different-thickness barrel, 12 is gradient thickness type doorframe, 13 is doorframe upper end, 14 is in the middle part of doorframe, 15 is doorframe lower end, 16 is barrel and the butt weld of gradient thickness type doorframe, 17 is doorframe outer wall, 18 is doorframe inwall, 19 is doorframe outer side wall, 20 is doorframe madial wall, 21 is tower cylinder door opening sidewall.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings below by embodiment:
Embodiment 1: as shown in Figure 5-Figure 7, to the present invention includes in the middle part of doorframe upper end 13, doorframe 14 and doorframe lower end 15 and, seamlessly transit between 14 in the middle part of doorframe upper end 13, doorframe lower end 15 and doorframe, doorframe outer wall 17 and the same radian of tower cylinder 1 outer wall, doorframe inwall 18 and tower cylinder 1 inwall adopt and seamlessly transit, the thickness of doorframe madial wall 20 is thick compared with the thickness of doorframe outer side wall 19, adopts full-penetration butt weld 16 to be connected between doorframe outer side wall 19 with tower cylinder door opening sidewall 21.
For the high wind power generation stepped engineering of the 80m shown in Fig. 1-Fig. 4, if do not offer door opening, bottom column barrel is thick can be taken as 28mm, and bottom column cylinder gross weight is 59.3 tons, wind power generation stepped tower body gross weight is 194.1 tons, and single order, Second Vibration Mode of Natural Frequencies are 0.86288Hz; If offer door opening and adopt annular doorframe 6 of putting more energy into strengthen hole, the thick need of bottom column barrel thicken to 37mm, bottom column cylinder and upper column cylinder joint adopt compensation grade to carry out the transition of thickness, bottom column cylinder gross weight is 64.7 tons, wind power generation stepped tower body gross weight is 199.5 tons, bottom column cylinder gross weight increases by 9.1%, and wind power generation stepped tower body gross weight increases by 2.8%.
According to technical solution of the present invention, 3 d modeling software UG and common finite element program-ABAQUS is utilized to carry out modeling to gradient thickness type tower cylinder doorframe, calculate and optimize, determine doorframe profile and size, make doorframe intensity, the fatigue strength of rigidity and doorframe weld seam all meets the demands, after then optimizing, bottom column barrel thickness is still 28mm, bottom column cylinder gross weight is 59.8 tons, wind power generation stepped tower body gross weight is 194.6 tons, compare and do not offer the wind power generation stepped of door opening, wind power generation stepped bottom column cylinder gross weight of the present invention is adopted only to increase by 0.8%, wind power generation stepped tower body gross weight only increases by 0.3%, compare and adopt annular to put more energy into the technological scheme of doorframe, adopt wind power generation stepped bottom column cylinder of the present invention can save the steel of 7.6%, whole wind power generation stepped can save 2.5% steel, effect is considerable.And wind power generation stepped single order, Second Vibration Mode of Natural Frequencies are respectively 0.86279Hz and 0.86325Hz, only differ 0.01% and 0.04% respectively with wind power generation stepped single order, the Second Vibration Mode of Natural Frequencies of not offering door opening, visible employing the present invention carries out reinforcement to wind power generation stepped door opening almost not to be affected wind power generation stepped low order self-vibration characteristic own.
Claims (3)
1. a gradient thickness type tower cylinder doorframe, it is characterized in that, described doorframe adopts solid forging or casting, structure in the form of a ring, connects to form one successively by the middle part of doorframe upper end, doorframe and doorframe lower end, and the space of ring-type doorframe inside forms door opening, described doorframe upper end and doorframe lower end curved, be straight line or camber line in the middle part of doorframe, in the middle part of doorframe upper end and doorframe, joint adopts and seamlessly transits, and in the middle part of doorframe lower end and doorframe, joint adopts and seamlessly transits; Described ring-type doorframe outer side wall is connected with tower cylinder door opening sidewall, described ring-type doorframe outer wall and the same radian of tower drum outer wall, and described ring-type doorframe inwall and tower cylinder inwall adopt and seamlessly transit; The thickness of described doorframe madial wall is thick compared with the thickness of doorframe outer side wall, offers the weakening of door opening to tower cylinder strength and stiffness to make up.
2. gradient thickness type doorframe according to claim 1, is characterized in that described doorframe upper end and doorframe lower end curve, adopts any one in circular arc, elliptic arc or other high order curves according to actual conditions.
3. gradient thickness type doorframe according to claim 1, is characterized in that described gradient thickness type tower cylinder doorframe adopts full-penetration butt weld to be connected with tower cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243159.0A CN104879280A (en) | 2015-05-14 | 2015-05-14 | Tower drum doorframe gradually varied in thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243159.0A CN104879280A (en) | 2015-05-14 | 2015-05-14 | Tower drum doorframe gradually varied in thickness |
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| Publication Number | Publication Date |
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| CN104879280A true CN104879280A (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510243159.0A Pending CN104879280A (en) | 2015-05-14 | 2015-05-14 | Tower drum doorframe gradually varied in thickness |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3219982A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Door frame of a wind turbine tower |
| EP3219985A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Wind turbine tower door frame |
| CN109869282A (en) * | 2019-03-14 | 2019-06-11 | 北京金风科创风电设备有限公司 | Tower section, manufacturing method of tower section, tower and wind generating set |
| CN110067707A (en) * | 2019-06-12 | 2019-07-30 | 新疆金风科技股份有限公司 | Mounting device, tower door opening reinforce method of plate installation and tower barrel of wind generating set |
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| US20070148004A1 (en) * | 2001-10-24 | 2007-06-28 | Jens-Thomas Wernicke | Structural member for manufacturing a tower of a wind turbine |
| CN101057074A (en) * | 2004-11-10 | 2007-10-17 | 维斯塔斯风力***有限公司 | A tower part for a wind turbine, an aperture cover system, a method for manufacturing a tower part and uses thereof |
| CN201588746U (en) * | 2010-01-28 | 2010-09-22 | 山东伊莱特重工有限公司 | Fan tower doorframe |
| CN102434408A (en) * | 2011-12-23 | 2012-05-02 | 北京金风科创风电设备有限公司 | Wind generating set tower frame door opening and design method thereof |
| CN104405597A (en) * | 2014-10-15 | 2015-03-11 | 新疆金风科技股份有限公司 | Door frame of fan tower, door frame unit, production method of door frame and fan tower |
| CN204646558U (en) * | 2015-05-14 | 2015-09-16 | 同济大学 | A kind of gradient thickness type tower cylinder doorframe |
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2015
- 2015-05-14 CN CN201510243159.0A patent/CN104879280A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070148004A1 (en) * | 2001-10-24 | 2007-06-28 | Jens-Thomas Wernicke | Structural member for manufacturing a tower of a wind turbine |
| CN101057074A (en) * | 2004-11-10 | 2007-10-17 | 维斯塔斯风力***有限公司 | A tower part for a wind turbine, an aperture cover system, a method for manufacturing a tower part and uses thereof |
| CN201588746U (en) * | 2010-01-28 | 2010-09-22 | 山东伊莱特重工有限公司 | Fan tower doorframe |
| CN102434408A (en) * | 2011-12-23 | 2012-05-02 | 北京金风科创风电设备有限公司 | Wind generating set tower frame door opening and design method thereof |
| CN104405597A (en) * | 2014-10-15 | 2015-03-11 | 新疆金风科技股份有限公司 | Door frame of fan tower, door frame unit, production method of door frame and fan tower |
| CN204646558U (en) * | 2015-05-14 | 2015-09-16 | 同济大学 | A kind of gradient thickness type tower cylinder doorframe |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3219982A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Door frame of a wind turbine tower |
| EP3219985A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Wind turbine tower door frame |
| CN109869282A (en) * | 2019-03-14 | 2019-06-11 | 北京金风科创风电设备有限公司 | Tower section, manufacturing method of tower section, tower and wind generating set |
| CN109869282B (en) * | 2019-03-14 | 2022-12-27 | 北京金风科创风电设备有限公司 | Tower section, manufacturing method of tower section, tower and wind generating set |
| CN110067707A (en) * | 2019-06-12 | 2019-07-30 | 新疆金风科技股份有限公司 | Mounting device, tower door opening reinforce method of plate installation and tower barrel of wind generating set |
| CN110067707B (en) * | 2019-06-12 | 2022-09-30 | 新疆金风科技股份有限公司 | Mounting device, mounting method of door opening reinforcing plate of tower drum and tower drum of wind generating set |
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Application publication date: 20150902 |
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| WD01 | Invention patent application deemed withdrawn after publication |