CN109086465A - A kind of axial fan hub connect the strength check methods of bolt with main shaft - Google Patents
A kind of axial fan hub connect the strength check methods of bolt with main shaft Download PDFInfo
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- CN109086465A CN109086465A CN201710444486.1A CN201710444486A CN109086465A CN 109086465 A CN109086465 A CN 109086465A CN 201710444486 A CN201710444486 A CN 201710444486A CN 109086465 A CN109086465 A CN 109086465A
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- 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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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The present invention provides the strength check methods that a kind of axial fan hub connect bolt with main shaft, include the following steps: to establish the threedimensional model that axial fan hub connect equipment on bolt load transmission path with main shaft, and the threedimensional model is imported into finite element software, establish the finite element model that axial fan hub connect bolt with main shaft；The finite element model for connecting bolt with main shaft to axial fan hub applies ultimate load, non-linear solution is carried out in finite element analysis software, calculate tensile stress of the bolt under limiting condition, the shear stress that generation is tightened in combination obtains the equivalent stress of bolt, and bond material yield strength and safety coefficient obtain bolt ultimate strength performance.Technical solution provided by the present invention, the axial fan hub of foundation is connect in bolt finite element model with main shaft, contain the equipment that axial fan hub is connect on bolt load transmission path with main shaft, so the path of load transmission is than more complete, thus to the performance that bolt is connected between axial fan hub and main shaft calculate also relatively accurately.
Description
Technical field
The invention belongs to wind generator system performance evaluation technical fields, and in particular to a kind of axial fan hub is connect with main shaft
The strength check methods of bolt.
Background technique
With increasingly consuming for traditional energy and getting worse for environmental problem, people can substitute traditional energy in searching
The new energy in source.And a kind of renewable energy of the wind energy as cleanliness without any pollution, increasingly it is valued by people.
It converts wind energy into electric energy to need using blower, the connection bolt in blower between wheel hub and main shaft is played and taken turns
The left and right of wind wheel torque is transmitted under the action of the gravity and wind load of hub and blade, and is born caused by the gravity and wind pressure of wind wheel
Moment of flexure, therefore the superiority and inferiority of its performance is straight, connects and is related to whether entire wind power generating set can work normally.
In the existing technology for connecting bolt performance evaluation with main shaft about wheel hub, conventional engineering calculating method is difficult
Reach the precision of actual requirement of engineering, only use finite element software, it is true loaded on load transfer path to simulate bolt
Situation just can guarantee the reliability that bolt strength is checked.
Currently, about the research for connecting bolt strength performance with main shaft to wheel hub, if publication No. is CN104699912A, name
The referred to as patent document of " a kind of wind generator unit wheel hub bolt strength calculation method is connect with main shaft ", discloses a kind of use
Finite element software establishes the finite element analysis model of bolt, the method for calculating the fatigue strength of bolt.But it is built in the patent
Vertical wheel hub connect that bolt finite element model is fairly simple with main shaft, and the actual transfer road of bolt load is connect with wheel hub with main shaft
Diameter is not consistent, so the calculated result to bolt strength is not accurate enough.
Summary of the invention
The purpose of the present invention is to provide a kind of axial fan hubs to connect the strength check methods of bolt with main shaft, solves existing
In technology when connecting bolt strength progress finite element analysis with main shaft to axial fan hub, the problem of result inaccuracy is analyzed.
To achieve the above object, present invention provide the technical scheme that
A kind of axial fan hub connect the strength check methods of bolt with main shaft, includes the following steps:
(1) threedimensional model that axial fan hub connect equipment on bolt load transmission path with main shaft is established, and by the three-dimensional
Model imports finite element software, establishes the finite element model that axial fan hub connect bolt with main shaft；
(2) connection in axial fan hub and main shaft connection bolt finite element model between the attribute and component of each component is arranged to close
System；
(3) finite element model for connecting bolt with main shaft to axial fan hub applies ultimate load, and soft in finite element analysis
Non-linear solution is carried out to the finite element model in part, calculates tensile stress of the bolt under limiting condition, generation is tightened in combination
Shear stress obtain the equivalent stress of bolt, bond material yield strength and safety coefficient obtain bolt ultimate strength performance.
Further, the equipment that the axial fan hub is connect on bolt load transmission path with main shaft includes in pitch variable bearings
Connection between circle, pitch variable bearings, pitch variable bearings outer ring, pitch motor, wheel hub, locking plate, main shaft prosthese and wheel hub and main shaft
Bolt is wherein attached between wheel hub and main shaft by two circle studs, and the inner ring bolt of two circle studs passes through wheel
The connection of the blind hole of hub and main shaft, outer ring bolt are attached by wheel hub, main shaft and brake disc.
Further, in the finite element model that axial fan hub connect bolt with main shaft, the axial fan hub and main shaft connect
Connecting bolt is set as beam element, the pitch variable bearings inner ring, pitch variable bearings, pitch variable bearings outer ring, locking plate, main shaft prosthese, spiral shell
The material of gasket is disposed as steel between bolt and each component, pitch motor, wheel hub material be set as QT350.
Further, in the finite element model that axial fan hub connect bolt with main shaft, the pitch variable bearings inner ring and change
Between the paddle shaft bearing outer-ring and engaging portion of pitch motor gear is disposed as connecting by Link10 unit, passes through setting
Link10 unit is arranged by pressure not by pulling force in keyword.
Further, in the finite element model that axial fan hub connect bolt with main shaft, the rotation axis of the pitch motor
Using pipe16 unit simulation, the connection between pitch motor rotation axis and engaging tooth uses beam4 unit simulation, pitch motor
Connection between rotation axis and pitch motor uses pipe16 unit simulation.
Further, it is equipped with gasket between two circle studs and wheel hub, connect having for bolt with main shaft in axial fan hub
It limits in meta-model, the inner ring bolt and outer ring bolt of the two circles studs are all made of beam4 unit and are simulated, and gasket is adopted
It is divided with solid185 solid element, is all made of between two circle studs and gasket and between two circle studs and blind hole
The connection of load umbrella.
Further, CONTACT WITH FRICTION, remaining part are set as between the wheel hub and main shaft and between main shaft and locking plate
Binding contact is set as between part.
Further, in the finite element model that axial fan hub connect bolt with main shaft, to main shaft endpoint node in three-dimensional
The freedom degree of three axial directions carries out displacement constraint in coordinate system.
Further, when applying ultimate load to the finite element model for connecting with main shaft bolt in axial fan hub, first
Establish the constraint equation of root center and pitch variable bearings inner ring, then root center apply load, and will apply load after
It is submitted in finite element analysis software and is calculated in the finite element model that axial fan hub connect with main shaft bolt.
The beneficial effects of the present invention are: technical solution provided by the present invention, the axial fan hub of foundation connect spiral shell with main shaft
In bolt finite element model, the equipment that axial fan hub is connect on bolt load transmission path with main shaft is contained, so load transmission
Path than more complete, so between axial fan hub and main shaft connect bolt performance calculate also relatively accurately.
Detailed description of the invention
Fig. 1 is that axial fan hub connect bolt FEM model schematic diagram with main shaft in embodiment；
Fig. 2 is the pitch motor schematic diagram that axial fan hub connect bolt finite element model with main shaft in embodiment；
Fig. 3 is the pitch variable bearings schematic diagram that axial fan hub connect bolt finite element model with main shaft in embodiment；
Fig. 4 is the bolt schematic diagram that axial fan hub connect bolt finite element model with main shaft in embodiment；
Fig. 5 is the bolt partial sectional view that axial fan hub connect bolt finite element model with main shaft in embodiment；
Fig. 6 is that the bolt fatigue strength calculation method that axial fan hub connect bolt finite element model with main shaft in embodiment is shown
It is intended to；
In figure: 1 is wheel hub, and 2 be brake disc, and 3 be main shaft, and 4 be pitch motor, and 5 be pitch variable bearings inner ring, and 6 be pitch axis
Bearing outer-ring, 7 be the mass21 unit for simulating root center, and 8,9 and 10 be respectively to nibble between simulation pitch motor and pitch variable bearings
Piepe16 unit, beam4 unit and the link10 unit of conjunction, 11 be the link10 unit for simulating pitch variable bearings roller, and 12 be pad
Piece, 13 and 14 be respectively the beam4 unit and piepe16 unit simulating bolt and connecting between gasket, and 15 be simulation wheel hub
The mass21 unit at center.
Specific embodiment
The purpose of the present invention is to provide a kind of axial fan hubs to connect the strength check methods of bolt with main shaft, solves existing
In technology when connecting bolt strength progress finite element analysis with main shaft to axial fan hub, the problem of result inaccuracy is analyzed.
To achieve the above object, present invention provide the technical scheme that
A kind of axial fan hub connect the strength check methods of bolt with main shaft, includes the following steps:
(1) threedimensional model that axial fan hub connect equipment on bolt load transmission path with main shaft is established, and by the three-dimensional
Model imports finite element software, establishes the finite element model that axial fan hub connect bolt with main shaft；
(2) connection in axial fan hub and main shaft connection bolt finite element model between the attribute and component of each component is arranged to close
System；
(3) finite element model for connecting bolt with main shaft to axial fan hub applies ultimate load, and soft in finite element analysis
Non-linear solution is carried out to the finite element model in part, calculates tensile stress of the bolt under limiting condition, generation is tightened in combination
Shear stress obtain the equivalent stress of bolt, bond material yield strength and safety coefficient obtain bolt ultimate strength performance.
Embodiments of the present invention are described further with reference to the accompanying drawing.
The present embodiment provides a kind of axial fan hubs to connect the strength check methods of bolt with main shaft, includes the following steps:
(1) geometrical model that axial fan hub connect bolt with main shaft is established on graphics software, which includes carrying
The pitch variable bearings inner ring of blower on lotus transmission path, pitch variable bearings, pitch variable bearings outer ring, pitch motor, wheel hub, locking plate,
Gasket between main shaft prosthese and each component；Such as Proe software can be used in graphics software；
(2) geometrical model that axial fan hub is connect to bolt with main shaft imports finite element analysis software, in conjunction with pitch motor
Shaft, gear meshing geometry size, using finite element software to carry out finite element modeling for unit, as shown in Figure 1, finite element fraction
Hpermesh etc. can be used in analysis software；Then connection relationship between the attribute and each component of each component is set；
In finite element software, each equipment in the geometrical model of bolt is connect with main shaft to axial fan hub, entity is respectively adopted
Unit carries out grid dividing；
In the finite element model that axial fan hub connect bolt with main shaft, axial fan hub connect bolt with main shaft and is set as beam
Unit, pitch variable bearings inner ring, pitch variable bearings, pitch variable bearings outer ring, locking plate, main shaft prosthese, bolt and each gasket material
It is disposed as steel, the material of pitch motor and wheel hub is set as QT350；
It is set as being attached by two circle studs between axial fan hub and main shaft, the inner ring spiral shell of two circle studs
Bolt is connected by the blind hole of wheel hub and main shaft, and outer ring bolt is attached by wheel hub, main shaft and brake disc；Two circle studs
Gasket is equipped between wheel hub, the inner ring bolt and outer ring bolt of two circle studs are all made of beam4 unit and are simulated, padded
Piece is divided using solid185 solid element, and between two circle studs and gasket and two enclose between studs and blind hole
It is connected using load umbrella.
The finite element model of pitch motor is as shown in Fig. 2, the connection between the engaging portion of pitch motor gear passes through
Link10 unit is simulated, and the link10 unit is arranged by pressure without by pulling force by the way that keyword is arranged；
The rotation axis of pitch motor is simulated using pipe16 unit, between pitch motor rotation axis and engaging tooth
Connection simulated by beam4 unit, the connection between pitch motor rotation axis and pitch motor pass through pipe16 unit into
Row simulation；
The finite element models of pitch variable bearings is as shown in figure 3, company between the inner ring of pitch variable bearings and the outer ring of pitch variable bearings
It connected link10 unit to be simulated, the link10 unit is set by pressure without by pulling force by the way that keyword is arranged；
It is set as CONTACT WITH FRICTION between wheel hub and main shaft and between main shaft and locking plate, is respectively provided between remaining part
For binding contact；
The finite element model of bolt is connect with main shaft for wheel hub as shown in figure 4, cross-sectional view is as shown in figure 5, wheel hub and main shaft connect
Connecting bolt is using beam4 unit simulation and applies pretightning force, and threaded portion is connected by load umbrella；
To in main shaft endpoint node in Ux, Uy, UzThe freedom degree in three directions carries out displacement constraint；
(3) intensity that axial fan hub connect bolt with main shaft is calculated；
The finite element model calculated axial fan hub and main shaft connection applies ultimate load, according to rotary hub center MY
Or the finite element result under the limiting fatigue operating condition of MZ, tri- components of stress of each bolt Sdir, Sbyt, Sbzt are extracted, every
22.5 degree calculate the tensile stress under corresponding angle, load-stress relation curve of the bolt under each angle are constructed, in conjunction with material
Expect SN curve and timing loading spectrum, obtains damage of the bolt under each angle of MY or MZ operating condition；According to defect theory, according to damage
The fatigue strength performance of equivalent available bolt group is carried out equal to 1.
Claims (9)
1. the strength check methods that a kind of axial fan hub connect bolt with main shaft, which comprises the steps of:
(1) threedimensional model that axial fan hub connect equipment on bolt load transmission path with main shaft is established, and by the threedimensional model
Finite element software is imported, the finite element model that axial fan hub connect bolt with main shaft is established；
(2) connection relationship in axial fan hub and main shaft connection bolt finite element model between the attribute and component of each component is set；
(3) finite element model for connecting bolt with main shaft to axial fan hub applies ultimate load, and in finite element analysis software
Non-linear solution is carried out to the finite element model, calculates tensile stress of the bolt under limiting condition, cutting for generation is tightened in combination
Shearing stress obtains the equivalent stress of bolt, and bond material yield strength and safety coefficient obtain bolt ultimate strength performance.
2. the strength check methods that a kind of axial fan hub according to claim 1 connect bolt with main shaft, which is characterized in that
The equipment that the axial fan hub is connect on bolt load transmission path with main shaft includes pitch variable bearings inner ring, pitch variable bearings, variable pitch
Connection bolt between bearing outer ring, pitch motor, wheel hub, locking plate, main shaft prosthese and wheel hub and main shaft, wherein wheel hub and master
It is attached between axis by two circle studs, the inner ring bolt of two circle studs is connected by the blind hole of wheel hub and main shaft
It connects, outer ring bolt is attached by wheel hub, main shaft and brake disc.
3. the strength check methods that a kind of axial fan hub according to claim 2 connect bolt with main shaft, which is characterized in that
In the finite element model that axial fan hub connect bolt with main shaft, the axial fan hub connect bolt with main shaft and is set as beam list
Member, between the pitch variable bearings inner ring, pitch variable bearings, pitch variable bearings outer ring, locking plate, main shaft prosthese, bolt and each component
The material of gasket is disposed as steel, pitch motor, wheel hub material be set as QT350.
4. the strength check methods that a kind of axial fan hub according to claim 2 connect bolt with main shaft, which is characterized in that
In the finite element model that axial fan hub connect bolt with main shaft, between the pitch variable bearings inner ring and pitch variable bearings outer ring, with
And the engaging portion of pitch motor gear is disposed as connecting by Link10 unit, it is mono- that Link10 is arranged by setting keyword
Member is by pressure not by pulling force.
5. the strength check methods that a kind of axial fan hub according to claim 2 connect bolt with main shaft, which is characterized in that
In the finite element model that axial fan hub connect bolt with main shaft, the rotation axis of the pitch motor uses pipe16 unit mould
Quasi-, the connection between pitch motor rotation axis and engaging tooth uses beam4 unit simulation, pitch motor rotation axis and pitch motor
Between connection use pipe16 unit simulation.
6. the strength check methods that a kind of axial fan hub according to claim 2 connect bolt with main shaft, which is characterized in that
Gasket, in the finite element model that axial fan hub connect bolt with main shaft, described two are equipped between two circle studs and wheel hub
The inner ring bolt and outer ring bolt for enclosing studs are all made of beam4 unit and are simulated, and gasket uses solid185 entity list
Member divides, and the connection of load umbrella is all made of between two circle studs and gasket and between two circle studs and blind hole.
7. the strength check methods that a kind of axial fan hub according to claim 2 connect bolt with main shaft, which is characterized in that
It is set as CONTACT WITH FRICTION between the wheel hub and main shaft and between main shaft and locking plate, is set as binding between remaining part
Contact.
8. the strength check methods that a kind of axial fan hub according to claim 1 connect bolt with main shaft, which is characterized in that
In the finite element model that axial fan hub connect bolt with main shaft, to main shaft endpoint node in three-dimensional system of coordinate three axial directions
Freedom degree carries out displacement constraint.
9. the strength check methods that a kind of axial fan hub according to claim 1 connect bolt with main shaft, which is characterized in that
To when axial fan hub connect the finite element model application ultimate load of bolt with main shaft, root center and variable pitch are initially set up
Then the constraint equation of bearing inner race applies load in root center, and will apply connecting after load in axial fan hub and main shaft
The finite element model of connecting bolt, which is submitted in finite element analysis software, to be calculated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710444486.1A CN109086465B (en) | 2017-06-13 | 2017-06-13 | Method for checking strength of connecting bolt of fan hub and main shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710444486.1A CN109086465B (en) | 2017-06-13 | 2017-06-13 | Method for checking strength of connecting bolt of fan hub and main shaft |
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| CN109086465B CN109086465B (en) | 2022-12-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109753756A (en) * | 2019-01-31 | 2019-05-14 | 太原科技大学 | A kind of check method of bipyramid expansion coupling sleeve design size |
| CN110941921A (en) * | 2019-10-24 | 2020-03-31 | 明阳智慧能源集团股份公司 | Method for checking strength of T-shaped nut at blade root of wind generating set |
| CN111444647A (en) * | 2020-03-13 | 2020-07-24 | 许昌许继风电科技有限公司 | Fan variable pitch bearing connecting bolt modeling and strength checking method |
| CN113297711A (en) * | 2021-07-28 | 2021-08-24 | 广东电网有限责任公司中山供电局 | Structure optimization method and device for passive loosening early warning bolt |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113297711A (en) * | 2021-07-28 | 2021-08-24 | 广东电网有限责任公司中山供电局 | Structure optimization method and device for passive loosening early warning bolt |
| CN113297711B (en) * | 2021-07-28 | 2022-01-07 | 广东电网有限责任公司中山供电局 | Structure optimization method and device for passive loosening early warning bolt |
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| CN109086465B (en) | 2022-12-13 |
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