CN106547963A - A kind of check method and device of fan yaw brake disc ultimate strength - Google Patents
A kind of check method and device of fan yaw brake disc ultimate strength Download PDFInfo
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- CN106547963A CN106547963A CN201610919339.0A CN201610919339A CN106547963A CN 106547963 A CN106547963 A CN 106547963A CN 201610919339 A CN201610919339 A CN 201610919339A CN 106547963 A CN106547963 A CN 106547963A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The present invention relates to the check method and device of a kind of fan yaw brake disc ultimate strength, belong to technical field of wind power generation.The present invention initially sets up the geometrical model comprising fan yaw brake load bang path, then the model is directed into finite element analysis software carries out stress and strain model, attachment structure load and boundary condition are set, by setting up node in tower top flange center position, node is coupled together by rigid beam element with mainframe front end flange, apply limiting condition load in tower top flange center position, by rigid beam element by load transmission to mainframe, yaw brake disc is transferred to through yaw brake pincers, to realize the accurate simulation to yaw brake disc stress relation.The stress intensity of the yaw brake disc obtained by said method, the present invention and the danger position degree of accuracy are higher, meet yaw brake disc actual loading relation, can realize the accurate check of fan yaw brake disc ultimate strength.
Description
Technical field
The present invention relates to the check method and device of a kind of fan yaw brake disc ultimate strength, belong to wind generating technology
Field.
Background technology
Now Large-scale Wind Turbines yaw brake disc is mainly calculated using Finite Element Method, mainframe with it is inclined
In the BORDER PROCESSING of boat brake disc, the main method for adopting conode or binding so only accounts for mainframe by driftage
The load of caliper transmission, and the load that mainframe is transmitted by yaw drive motor is simplified, can so cause yaw brake
Disk final calculation result is bigger than normal.Simultaneously because generally using the method for overall conode during simulation yaw, it is impossible to embody
The non-linear relation that pressure is not subject to pulling force is solely subjected to during bearing power transmission, the yaw brake disc ultimate strength for obtaining is also inaccurate.
The content of the invention
It is an object of the invention to provide the check method and device of a kind of fan yaw brake disc ultimate strength, to solve mesh
The not accurate enough problem of fan yaw brake disc ultimate strength that front employing conode or binding method are obtained.
The present invention provides a kind of check method of fan yaw brake disc ultimate strength to solve above-mentioned technical problem, should
Method is comprised the following steps：
1) geometrical model comprising fan yaw brake load bang path is set up, the geometrical model at least includes main frame
Frame, yaw drive motor, yaw, yaw brake pincers, yaw brake disc, tower top flange and tower；
2) above-mentioned geometrical model is directed into finite element analysis software carries out stress and strain model；
3) node is set up in tower top flange center position, and the node and mainframe front end flange are passed through into rigid beam element
Couple together, load is transmitted with simulation framework frame, wherein between yaw ball and yaw and deviation drive device
Gear engagement using be solely subjected to pressure bar unit simulation；Mainframe, yaw drive motor, yaw, yaw brake pincers,
Composition surface between yaw brake disc and tower top flange is attached by binding the way of contact；
4) apply each limiting condition load in tower top flange center position, FEM model under each limiting condition is carried out non-
Linear solution, checks yaw brake disc stress intensity and danger position, checks by the value is compared with part allowable stress value
Yaw brake disc ultimate strength.
Further, the step 4) when tower top flange center position applies limiting condition load, load is by rigidity
Load transmission to mainframe is transferred to yaw brake disc through yaw brake pincers, to simulate receiving for yaw brake disc by beam element
Power situation.
Further, the step 2) when stress and strain model is carried out, driftage drive gear adopts pipe unit and beam element
It is simulated, is attached by rigid beam element between driftage drive gear and yaw drive motor；Mainframe, driftage drive
Motor and yaw brake disc adopt tetrahedron element grid division；Yaw, yaw brake pincers, tower top flange and tower
Using hexahedral element grid division.
Further, the tetrahedron element and hexahedral element 30～100mm is using the size of grid.
Further, the pipe unit and beam element divide number and are 10～20.
Present invention also offers a kind of capacity checking device of fan yaw brake disc ultimate strength, the capacity checking device includes geometry
Module is checked in model building module, stress and strain model module, load and boundary condition setup module and calculating；
The geometrical model set up module for set up comprising fan yaw brake load bang path geometrical model, this
Geometrical model at least include mainframe, yaw drive motor, yaw, yaw brake pincers, yaw brake disc, tower top flange with
And tower；
The stress and strain model module carries out stress and strain model for the geometrical model is directed into finite element analysis software；
The load and boundary condition setup module for setting up node in tower top flange center position, and by the node with
Mainframe front end flange is coupled together by rigid beam element, transmits load with simulation framework frame, wherein yaw ball with
And the gear between yaw and deviation drive device is engaged using the bar unit simulation for being solely subjected to pressure；Mainframe, driftage
Motor, yaw, yaw brake pincers, the composition surface between yaw brake disc and tower top flange are by binding contact
Mode is attached；
Described calculating checks module for applying each limiting condition load in tower top flange center position, to each limiting condition
Lower FEM model carries out non-linear solution, checks yaw brake disc stress intensity and danger position, will be the value and part allowable
Stress value checks yaw brake disc ultimate strength by comparing.
Further, described calculating checks module when tower top flange center position applies limiting condition load, and load is led to
Rigid beam element is crossed by load transmission to mainframe, yaw brake disc is transferred to through yaw brake pincers, to simulate yaw brake
The stressing conditions of disk.
Further, the stress and strain model module is when stress and strain model is carried out, driftage drive gear adopt pipe unit and
Beam element is simulated, and is attached by rigid beam element between driftage drive gear and yaw drive motor；Mainframe, partially
Boat motor and yaw brake disc adopt tetrahedron element grid division；Yaw, yaw brake pincers, tower top flange with
And tower adopts hexahedral element grid division.
Further, the tetrahedron element and hexahedral element 30～100mm is using the size of grid.
Further, the pipe unit and beam element divide number and are 10～20.
The invention has the beneficial effects as follows：The present invention initially sets up the geometry mould comprising fan yaw brake load bang path
Type, the model is directed into finite element analysis software then carries out stress and strain model, arranges attachment structure load and boundary condition, leads to
Crossing and node being set up in tower top flange center position, node is coupled together by rigid beam element with mainframe front end flange,
Tower top flange center position applies limiting condition load, by rigid beam element by load transmission to mainframe, through driftage system
Dynamic pincers are transferred to yaw brake disc, to realize the accurate simulation to yaw brake disc stress relation, embody yaw itself
And the non-linear force-transmitting relation between driftage drive gear and yaw external toothing.By said method, the present invention is obtained
Yaw brake disc stress intensity and the danger position degree of accuracy it is higher, meet yaw brake disc actual loading relation, Neng Goushi
The accurate check of existing fan yaw brake disc ultimate strength.
Description of the drawings
Fig. 1 is the FEM model generalized section that the present invention is arranged；
Fig. 2 is deviation drive device connection diagram；
In figure：1- mainframes, 2- yaw brakes pincers, outside 3- yaw inner rings, 4- yaw balls, 5- yaws
Circle, 6- yaw brakes, 7- tower 8- tower top flanges, 9- rigidity beam element, 10- yaw drive motors, 11- yaw drive shafts,
12- driftage drive gears.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
The embodiment of the check method of fan yaw brake disc ultimate strength of the present invention
The check method of the present invention adopts ANSYS (finite element analysis software) for implementation tool, and this example is with certain fan yaw
The method of brake disc Ship Ultimate Strength Analysis is specifically described, and the check method comprises the steps：
1. the geometrical model comprising fan yaw brake load bang path is set up.
The present embodiment sets up the geometrical model comprising fan yaw brake load bang path in three-dimensional software, is built
Geometrical model mainframe 1, yaw drive motor 10, yaw, yaw brake pincers 2, yaw inner ring 3, yaw rolling
The geometrical model of pearl 4, yaw outer ring 5, yaw brake disc 6, tower top flange 8 and tower 7, as shown in figure 1, driftage drives
Device is as shown in Fig. 2 including yaw drive motor 10, yaw drive shaft 11 and driftage drive gear 12.
2. model is directed into finite element analysis software carries out stress and strain model.
Yaw brake disc 6 and adjacent component geometrical model are directed into ANSYS softwares carries out stress and strain model, specifically divides
Journey is as follows：In finite element analysis software, driftage drive gear 12 adopts pipe unit and beam element to be simulated, and driftage drives
It is attached by rigid beam element between gear 12 and yaw drive motor 10, mainframe 1, yaw drive motor 10 and partially
Boat brake disc 6 adopts tetrahedron element grid division, yaw, yaw brake pincers 2, tower top flange 8 and tower 7 to adopt six
Face body unit grid division.Each component unit facilities refer to table 1；To import 3-D geometric model adopt tetrahedron or
Hexahedral element carries out stress and strain model, meanwhile, unit grid is sized to 30～100mm；For driftage gear shaft is adopted
With pipe unit simulation, its sectional dimension and gear shaft consistent size, unit number is 10～20；Driftage drive gear engagement
It is connected by three-dimensional beam element to be simulated between point and yaw drive shaft 11, beam element number is 10～20.FEM model
Unit arranges concrete as shown in table 1.
Table 1
3. attachment structure load and boundary condition are set.
Node is set up in tower top flange center position, and the node and mainframe front end flange are passed through into rigid beam element 9
Couple together, load is transmitted with simulation framework frame.Composition surface between wherein each part is attached by binding contact setting；
The bar unit engaged by being subjected only to pressure between driftage drive gear and yaw external toothing is simulated；Meanwhile, partially
Boat bearing ball is also adopted by being subjected only to the bar unit of pressure and is simulated.
4. FEM model calculates and solves and check result.
Apply each limiting condition load in tower top flange center position, non-thread is carried out to FEM model under each limiting condition
Property solve, by the value is compared with part allowable stress value check yaw brake disc ultimate strength.
The present embodiment is carried out non-using the newton-La Pusen algorithms of ANSYS softwares to FEM model under each limiting condition
Linear analysis is solved, and FEM model calculates the computational methods solved using non-linear solution, and the non-linear factor in calculating leads to
Bar unit simulation is crossed, specially：By be subjected only to the bar unit of pressure simulate yaw and yaw drive motor gear with
Non-linear force-transmitting relation between yaw.Yaw brake disc stress intensity and danger position are checked by cloud atlas after calculating,
Yaw brake disc ultimate strength is checked by the value is compared with part allowable stress value.
The embodiment of the capacity checking device of fan yaw brake disc ultimate strength of the present invention
In the present embodiment, capacity checking device includes that geometrical model is set up module, stress and strain model module, load and boundary condition and set
Put module and calculate and check module；Geometrical model is set up module and transmits road comprising fan yaw brake load for setting up
The geometrical model in footpath, the geometrical model at least include mainframe, yaw drive motor, yaw, yaw brake pincers, driftage system
Moving plate, tower top flange and tower；Stress and strain model module is carried out for the geometrical model is directed into finite element analysis software
Stress and strain model；Load and boundary condition setup module for setting up node in tower top flange center position, and by the node and master
Frame front end flange is coupled together by rigid beam element, transmits load with simulation framework frame, wherein yaw ball and
Gear between yaw and deviation drive device is engaged using the bar unit simulation for being solely subjected to pressure；Mainframe, driftage are driven
Dynamic motor, yaw, yaw brake pincers, the composition surface between yaw brake disc and tower top flange are by binding contact side
Formula is attached；Calculate module is checked for applying each limiting condition load in tower top flange center position, to each limiting condition
Lower FEM model carries out non-linear solution, checks yaw brake disc stress intensity and danger position, will be the value and part allowable
Stress value checks yaw brake disc ultimate strength by comparing.The means that implement of each module are entered in the embodiment of method
Detailed description is gone, has repeated no more here.
Claims (10)
1. a kind of check method of fan yaw brake disc ultimate strength, it is characterised in that the check method is comprised the following steps：
1) set up the geometrical model comprising fan yaw brake load bang path, the geometrical model at least includes mainframe, partially
Boat motor, yaw, yaw brake pincers, yaw brake disc, tower top flange and tower；
2) above-mentioned geometrical model is directed into finite element analysis software carries out stress and strain model；
3) node is set up in tower top flange center position, and the node is connected by rigid beam element with mainframe front end flange
Get up, load, the wherein tooth between yaw ball and yaw and deviation drive device are transmitted with simulation framework frame
Wheel engagement is using the bar unit simulation for being solely subjected to pressure；Mainframe, yaw drive motor, yaw, yaw brake pincers, driftage
Composition surface between brake disc and tower top flange is attached by binding the way of contact；
4) apply each limiting condition load in tower top flange center position, FEM model under each limiting condition is carried out non-linear
Solve, check yaw brake disc stress intensity and danger position, by the value is compared with part allowable stress value, check driftage
Brake disc ultimate strength.
2. the check method of fan yaw brake disc ultimate strength according to claim 1, it is characterised in that the step
4) when tower top flange center position applies limiting condition load, load passes through rigid beam element by load transmission to mainframe,
Yaw brake disc is transferred to through yaw brake pincers, to simulate the stressing conditions of yaw brake disc.
3. the check method of fan yaw brake disc ultimate strength according to claim 1, it is characterised in that the step
2) when stress and strain model is carried out, driftage drive gear adopts pipe unit and beam element to be simulated, driftage drive gear with it is inclined
It is attached by rigid beam element between boat motor；Mainframe, yaw drive motor and yaw brake disc adopt four
Face body unit grid division；Yaw, yaw brake pincers, tower top flange and tower adopt hexahedral element grid division.
4. the check method of fan yaw brake disc ultimate strength according to claim 3, it is characterised in that the four sides
Body unit and hexahedral element 30～100mm is using the size of grid.
5. the check method of fan yaw brake disc ultimate strength according to claim 3, it is characterised in that the Guan Dan
Unit and beam element divide number and are 10～20.
6. a kind of capacity checking device of fan yaw brake disc ultimate strength, it is characterised in that the capacity checking device includes geometrical model
Set up module, stress and strain model module, load and boundary condition setup module and calculate and check module；
The geometrical model sets up module for setting up the geometrical model comprising fan yaw brake load bang path, should
Geometrical model at least include mainframe, yaw drive motor, yaw, yaw brake pincers, yaw brake disc, tower top flange with
And tower；
The stress and strain model module carries out stress and strain model for the geometrical model is directed into finite element analysis software；
The load and boundary condition setup module for setting up node in tower top flange center position, and by the node and main frame
Frame front end flange is coupled together by rigid beam element, transmits load with simulation framework frame, wherein yaw ball and partially
Gear between boat bearing and deviation drive device is engaged using the bar unit simulation for being solely subjected to pressure；Mainframe, driftage drive
Motor, yaw, yaw brake pincers, the composition surface between yaw brake disc and tower top flange are by binding the way of contact
It is attached；
Described calculating checks module for applying each limiting condition load in tower top flange center position, to having under each limiting condition
Limit meta-model carries out non-linear solution, checks yaw brake disc stress intensity and danger position, by the value and part allowable stress
Value checks yaw brake disc ultimate strength by comparing.
7. the capacity checking device of fan yaw brake disc ultimate strength according to claim 6, it is characterised in that the calculating
Module is checked when tower top flange center position applies limiting condition load, load is by rigid beam element by load transmission to master
Frame, is transferred to yaw brake disc through yaw brake pincers, to simulate the stressing conditions of yaw brake disc.
8. the capacity checking device of fan yaw brake disc ultimate strength according to claim 6, it is characterised in that the grid
When stress and strain model is carried out, driftage drive gear adopts pipe unit and beam element to be simulated to division module, sliding tooth of going off course
It is attached by rigid beam element between wheel and yaw drive motor；Mainframe, yaw drive motor and yaw brake disc
Using tetrahedron element grid division；Yaw, yaw brake pincers, tower top flange and tower are divided using hexahedral element
Grid.
9. the capacity checking device of fan yaw brake disc ultimate strength according to claim 8, it is characterised in that the four sides
Body unit and hexahedral element 30～100mm is using the size of grid.
10. the capacity checking device of fan yaw brake disc ultimate strength according to claim 8, it is characterised in that the pipe
Unit and beam element divide number and are 10～20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919339.0A CN106547963B (en) | 2016-10-21 | 2016-10-21 | Method and device for checking ultimate strength of fan yaw brake disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919339.0A CN106547963B (en) | 2016-10-21 | 2016-10-21 | Method and device for checking ultimate strength of fan yaw brake disc |
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| CN106547963A true CN106547963A (en) | 2017-03-29 |
| CN106547963B CN106547963B (en) | 2020-05-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729597A (en) * | 2017-08-29 | 2018-02-23 | 明阳智慧能源集团股份公司 | A kind of main shaft bearing raceway checks instrument |
| CN108547740A (en) * | 2018-03-21 | 2018-09-18 | 内蒙古久和能源装备有限公司 | A kind of main frame of wind turbine generator system limited strength member computational methods |
| CN109299532A (en) * | 2018-09-17 | 2019-02-01 | 许继集团有限公司 | A kind of blower mainframe connect bolt strength check method and system with rear frame |
| CN109543241A (en) * | 2018-10-30 | 2019-03-29 | 浙江万向系统有限公司 | A kind of brake disc standard normal direction mode automatic identifying method |
| CN109726410A (en) * | 2017-10-31 | 2019-05-07 | 北京万源工业有限公司 | The calculation method that wind energy conversion system yaw connection bolt strength is checked |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103324805A (en) * | 2013-07-04 | 2013-09-25 | 沈阳华创风能有限公司 | Calculation method for checking ultimate strength of fan underframe |
| CN105069223A (en) * | 2015-08-05 | 2015-11-18 | 许继集团有限公司 | Method for checking ultimate strength and fatigue strength of wind turbine tower drum door opening |
| US20160283622A1 (en) * | 2015-03-23 | 2016-09-29 | Alstom Renewable Technologies Wind B.V. | Obtaining Dynamic Properties of a Part of Wind Turbine |
-
2016
- 2016-10-21 CN CN201610919339.0A patent/CN106547963B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103324805A (en) * | 2013-07-04 | 2013-09-25 | 沈阳华创风能有限公司 | Calculation method for checking ultimate strength of fan underframe |
| US20160283622A1 (en) * | 2015-03-23 | 2016-09-29 | Alstom Renewable Technologies Wind B.V. | Obtaining Dynamic Properties of a Part of Wind Turbine |
| CN105069223A (en) * | 2015-08-05 | 2015-11-18 | 许继集团有限公司 | Method for checking ultimate strength and fatigue strength of wind turbine tower drum door opening |
Non-Patent Citations (1)
| Title |
|---|
| 何海建 等: "MW级风力发电机组偏航制动盘强度分析", 《机械与电子》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729597A (en) * | 2017-08-29 | 2018-02-23 | 明阳智慧能源集团股份公司 | A kind of main shaft bearing raceway checks instrument |
| CN107729597B (en) * | 2017-08-29 | 2021-07-30 | 明阳智慧能源集团股份公司 | Tool for checking main shaft bearing raceway |
| CN109726410A (en) * | 2017-10-31 | 2019-05-07 | 北京万源工业有限公司 | The calculation method that wind energy conversion system yaw connection bolt strength is checked |
| CN109726410B (en) * | 2017-10-31 | 2022-12-27 | 广东省风力发电有限公司 | Calculation method for checking strength of yaw connecting bolt of wind turbine |
| CN108547740A (en) * | 2018-03-21 | 2018-09-18 | 内蒙古久和能源装备有限公司 | A kind of main frame of wind turbine generator system limited strength member computational methods |
| CN109299532A (en) * | 2018-09-17 | 2019-02-01 | 许继集团有限公司 | A kind of blower mainframe connect bolt strength check method and system with rear frame |
| CN109299532B (en) * | 2018-09-17 | 2022-12-13 | 许继集团有限公司 | Method and system for checking strength of connecting bolt of main frame and rear frame of fan |
| CN109543241A (en) * | 2018-10-30 | 2019-03-29 | 浙江万向系统有限公司 | A kind of brake disc standard normal direction mode automatic identifying method |
| CN109543241B (en) * | 2018-10-30 | 2023-07-14 | 浙江万向系统有限公司 | Automatic identification method for standard normal mode of brake disc |
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