CN104715118A - Method for calculating strength of yaw bearing connecting bolt of wind generating set - Google Patents
Method for calculating strength of yaw bearing connecting bolt of wind generating set Download PDFInfo
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- CN104715118A CN104715118A CN201510132821.5A CN201510132821A CN104715118A CN 104715118 A CN104715118 A CN 104715118A CN 201510132821 A CN201510132821 A CN 201510132821A CN 104715118 A CN104715118 A CN 104715118A
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Abstract
The invention discloses a method for calculating the strength of a yaw bearing connecting bolt of a wind generating set. The method for calculating the strength of the yaw bearing connecting bolt of the wind generating set comprises the steps that modeling is conducted with existing finite element software as a platform, the material attributes of all components are defined, calculation is conducted, and a deformation and stress nephogram is obtained, wherein the modeling process mainly comprises the steps that a hub, a variable-pitch bearing and a blade are simulated by means of solid units by conducting modeling in the finite element software, and a bolt is simulated by means of a beam unit; all constraint is applied to the pulling contact surface of the hub and a main shaft. The method for calculating the strength of the yaw bearing connecting bolt of the wind generating set has the advantages that the strength of the yaw bearing connecting bolt of the wind generating set can be calculated accurately and easily, multiple working conditions are calculated at the same time, time is saved easily, cost is reduced easily, and the method is suitable for being popularized widely.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly relate to a kind of wind generating set yaw bearing coupling bolt computing method.
Background technology
The connection of mainframe and pylon is realized by bolt, and bolt can not bear the effect of pretightning force, also will bear the load of oneself hub centre, and this proposes very high requirement to driftage bearing coupling bolt.In order to meet requirement of strength, being all generally carry out analytical calculation by the experimental formula that standard provides, and wherein having many simplified conditions to make computational accuracy very low.In order to ensure the safe and reliable operation of the coupling bolt of mainframe and pylon, often adopt the method strengthening safety coefficient.Because carry out accurate optimal design to the coupling bolt of mainframe and pylon and accurate intensive analysis is particularly important.Adopt the method for Conjoint Analysis, utilize UG software and the coupling bolt of ANSYS finite element analysis software to aerogenerator mainframe and pylon to carry out Strength co-mputation and force analysis.Made the illustraton of model of the coupling bolt of mainframe and pylon by UG software, according to the method for mapping and step, Parametric designing has been carried out to illustraton of model.And UG illustraton of model is changed into form and import again in ANSYS analysis software and carry out finite element analysis.Analysis result shows: the method can reflect wheel hub force and deformation situation more exactly, has advantages such as calculating accurately, wheel hub structure is rationally distributed, lightweight, amendment is convenient compared with theoretical calculation.
Summary of the invention
For above defect, the object of this invention is to provide a kind of wind generating set yaw bearing coupling bolt computing method, thus be conducive to can the strength character of the coupling bolt of accurate calculation mainframe and pylon more, and multiple operating mode can be calculated simultaneously, expand the scope of application.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of wind generating set yaw bearing coupling bolt computing method, by existing finite element software be platform implement modeling, finally define all parts material properties, calculate, draw the curve relation figure of load and bolt stress, and then joint bolt standard calculates stress and fatigue lifetime, mainly comprises the following steps in modeling process:
(1) first, be AXIALLY SYMMETRIC PROBLEMS the problem owing to analyzing, mainframe, pylon, driftage bearing only get half
(2) secondly, driftage bearing enclose carrys out the transmission of realizable force by LINK unit
(3) mainframe sets up face and face contact relation with driftage bearing inner race, bolt and driftage bearing, bolt and pylon, realizes power transmission.
(4) mainframe adopts solid element SOLID187; Pylon and driftage bearing adopt the solid element SOLID185 without intermediate node, and body of bolt adopts beam element simulation, and bolt head adopts SHELL unit simulation.Bolt and mainframe adopt conode to realize and are threaded.
(5) push up flange center and set up node, node is set up rigidity by MPC unit and mainframe and is connected.
The beneficial effect of wind generating set yaw bearing coupling bolt computing method of the present invention is: mainframe, pylon and driftage bearing, first by carrying out modeling in finite element software, are adopted solid element simulation by performed step; In addition, Ye Ding flange center node imposed load is also included in, to applying all constraints bottom pylon; Finally define all parts material properties, calculate distortion and Stress Map; Thus be conducive to calculating accurately the strength character of driftage bearing coupling bolt, and multiple operating mode can be calculated simultaneously, be conducive to saving time, cost-saving, be very suitable for promoting on a large scale.
Accompanying drawing explanation
According to embodiment and accompanying drawing, the present invention is described in further detail below.
Fig. 1 is the computation model of wind generating set yaw bearing coupling bolt computing method described in the embodiment of the present invention;
Fig. 2 is the LINK unit of wind generating set yaw bearing coupling bolt computing method described in the embodiment of the present invention.Fig. 3 is the bolt unit of wind generating set yaw bearing coupling bolt computing method described in the embodiment of the present invention.
In figure:
1, mainframe; 2, pylon; 3, driftage bearing;
4, LINK unit; 5, bolt;
Embodiment
As shown in Figure 1, wind generating set yaw bearing coupling bolt computing method of the present invention, its step mainly comprises:
(1) with existing finite element software for platform, implement modeling, first due to analyze problem be AXIALLY SYMMETRIC PROBLEMS, mainframe 1, pylon 2, driftage bearing 3 only get half
(2) secondly, driftage bearing enclose carrys out the transmission of realizable force by LINK4 unit
(3) mainframe 1 sets up face and face contact relation with driftage bearing 3, bolt 5 with pylon 2 with driftage bearing 3 inner ring, bolt 5, realizes power transmission.
(4) mainframe 1 adopts solid element SOLID187; Pylon 2 and driftage bearing 3 adopt the solid element SOLID185 without intermediate node, and body of bolt adopts beam element simulation, and bolt head adopts SHELL unit simulation.Bolt and mainframe adopt conode to realize and are threaded
Moment of flexure is applied to finite element model, obtains a graph of a relation of external force and bolt stress, in conjunction with markov matrix, calculate the fatigue lifetime of bolt.
In addition, the concrete mode applying position constraint is: apply all constraints bottom pylon.
Claims (5)
1. wind generating set yaw bearing coupling bolt computing method, is characterized in that: calculate internal relation that is bolt strained and external force accurately, are conducive to life-span and the intensity of assessing bolt.
2., according to claim 1, because the problem analyzed is AXIALLY SYMMETRIC PROBLEMS, mainframe, pylon, driftage bearing only get half.
3., according to claim 1, driftage bearing enclose carrys out the transmission of realizable force by LINK unit.
4., according to claim 1, mainframe sets up face and face contact relation with driftage bearing inner race, bolt and driftage bearing, bolt and pylon, realizes power transmission; Mainframe adopts solid element SOLID187; Pylon and driftage bearing adopt the solid element SOLID185 without intermediate node, and body of bolt adopts beam element simulation, and bolt head adopts SHELL unit simulation.Bolt and mainframe adopt conode to realize and are threaded.
5. according to claim 1, described wind generating set yaw bearing coupling bolt computing method, is characterized in that: adopt 1/2nd models to calculate, save computational resource.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510132821.5A CN104715118A (en) | 2015-03-25 | 2015-03-25 | Method for calculating strength of yaw bearing connecting bolt of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510132821.5A CN104715118A (en) | 2015-03-25 | 2015-03-25 | Method for calculating strength of yaw bearing connecting bolt of wind generating set |
Publications (1)
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| CN104715118A true CN104715118A (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510132821.5A Pending CN104715118A (en) | 2015-03-25 | 2015-03-25 | Method for calculating strength of yaw bearing connecting bolt of wind generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113408025A (en) * | 2021-06-03 | 2021-09-17 | 中国电建集团华东勘测设计研究院有限公司 | VB language-based wind power steel-concrete tower design tool and parameterized three-dimensional design method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366049A (en) * | 2013-06-25 | 2013-10-23 | 沈阳华创风能有限公司 | Computing method for hub ultimate strength of wind turbine generator system |
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2015
- 2015-03-25 CN CN201510132821.5A patent/CN104715118A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366049A (en) * | 2013-06-25 | 2013-10-23 | 沈阳华创风能有限公司 | Computing method for hub ultimate strength of wind turbine generator system |
Non-Patent Citations (3)
| Title |
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| 何冲: "风电偏航轴承接触应力分析与疲劳寿命研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113408025A (en) * | 2021-06-03 | 2021-09-17 | 中国电建集团华东勘测设计研究院有限公司 | VB language-based wind power steel-concrete tower design tool and parameterized three-dimensional design method |
| CN113408025B (en) * | 2021-06-03 | 2022-06-14 | 中国电建集团华东勘测设计研究院有限公司 | VB language-based wind power steel-concrete tower design tool and parameterized three-dimensional design method |
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Application publication date: 20150617 |