CN102477958A - Novel bearing box - Google Patents

Novel bearing box Download PDF

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Publication number
CN102477958A
CN102477958A CN2010105547469A CN201010554746A CN102477958A CN 102477958 A CN102477958 A CN 102477958A CN 2010105547469 A CN2010105547469 A CN 2010105547469A CN 201010554746 A CN201010554746 A CN 201010554746A CN 102477958 A CN102477958 A CN 102477958A
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CN
China
Prior art keywords
bearing housing
flange
wind turbine
rotor shaft
mainframe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010105547469A
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Chinese (zh)
Inventor
董海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian Chuangda Technology Trade Market Co Ltd
Original Assignee
Dalian Chuangda Technology Trade Market Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dalian Chuangda Technology Trade Market Co Ltd filed Critical Dalian Chuangda Technology Trade Market Co Ltd
Priority to CN2010105547469A priority Critical patent/CN102477958A/en
Publication of CN102477958A publication Critical patent/CN102477958A/en
Pending legal-status Critical Current

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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Abstract

The invention provides a novel bearing box which is used for containing a rotor shaft of a wind turbine. The bearing box comprises a flange which is used for leading the bearing box and a main frame of a wind turbine to be connected. The flange is provided with a connecting surface which is attached on the main frame. Therefore, when the connecting surface is observed from the top of the bearing box, at least one part of the connecting surface is arranged under the rotor shaft.

Description

The novel bearing case
Technical field
The present invention relates to wind turbine.In addition, the present invention relates to the load conveying element of wind turbine.Particularly, the present invention relates to bearing housing, mainframe and wind turbine.
Background technique
Wind turbine provides the main energy sources that is convertible into electric energy and is used for practical electrical network.Through driving generator (being generally the AC influence generator), in wind turbine, realize the conversion of wind energy to electric energy.Recently, aspect the Environmental security and the relatively inexpensive convertible energy, wind turbine has received more concern.Along with the concern of this growth, reliable to researching and developing, effectively and the wind turbine that has increased practicability carried out considerable effort.
, aspect high wind speed or for big wind turbine, the energy that rotor obtains from wind can produce the big load that acts on the mechanical component.Send load to pylon necessary all elements and bear these big loads.Therefore, the element that resembles bearing housing and mainframe need have enough intensity.The general quantity of material that bears these loads that increases of prior art system.And this is considered to a kind of unaccommodated method.Increase the intensity of material, for example also brought the disadvantage of gaining in weight.Therefore, need improve each element.
Summary of the invention
According to an aspect of the present invention, the bearing housing that is used to hold the rotor shaft of wind turbine comprises: be used to a flange that said bearing housing is connected with the mainframe of said wind turbine; Said flange has and will be attached at one on the said mainframe and connect the surface, and from the top view of said bearing housing the time, at least a portion on said connection surface is positioned at below the said rotor shaft.
According to a further aspect in the invention, the bearing housing that is used to hold the rotor shaft of wind turbine comprises: be used to a flange that said bearing housing is connected with the mainframe of said wind turbine; Said flange has can be by an average connection surface, a plane, and said plane is with respect to the axis tilt at least 20 of said rotor shaft oThe angle.
Wind turbine according to the present invention comprises: a pylon of definition z axle; One rotor; One rotor shaft of definition x axle, the axis of said rotor shaft is positioned at y-position y.And rotor shaft has radius r; One mainframe; A bearing housing that holds said rotor shaft, said bearing housing comprise a flange that is used to connect said bearing housing and said mainframe; Wherein said flange comprises that part is positioned at the z position below the said rotor shaft and is positioned at y simultaneously sOne r and y sOne of y position between the+r connects the surface.
Mainframe according to wind turbine of the present invention comprises: a flange; It has the bearing housing that is used to connect said mainframe and said wind turbine one with the surface that is connected of bearing housing coupling; Wherein from top view the time, said at least a portion that is connected the surface with the bearing housing coupling is positioned at below the rotor shaft.
Other advantages of the present invention, characteristic, aspect and details are conspicuous in dependent claims, specification and accompanying drawing.
According to an aspect of theme invention, provide one be used to hold the rotor shaft of wind turbine bearing housing.Said bearing housing comprises and is used to a flange (flange) that bearing housing is connected with the mainframe of wind turbine.Said flange has and bearing housing is attached at one on the mainframe connects the surface.Wherein, when when the end face of bearing housing is observed, at least a portion that connects the surface is positioned at the below of rotor shaft present position.
According on the other hand, the flange of bearing housing have can by a plane average one connect the surface.Connect the axis tilt at least 20 of the plane on surface with respect to rotor shaft oThe angle.Generally, said angle is 35 oWith 65 oBetween.
On the big rotor shaft of load at wind turbine the time, these loads receive and are transferred into bearing housing by the bearing of rotor shaft.Independent (singular) load that uses for fear of routine transmits point, and the flange of above-mentioned bearing housing is provided.Therefore, load more effectively is sent to pylon, and has reduced through using more material compensations to increase the necessity of load.This point can be achieved through new design.Utilize above-mentioned aspect, can comprehensive several advantages.On the one hand, the layout of bearing housing can be continuous with the layout of main frame body.This load that can be used for improving between the element transmits.On the other hand, construct said flange, to reduce the shear rate between the element and to make bearing housing and mainframe to separate.Help like this making, transport and assembling.Therefore, enough structure aspect and Load distribution aspect are combined through inclination flange surface energy.
According on the other hand, bearing housing is cast into discrete component basically.Therefore, in the bearing housing main body, do not introduce under the situation of unnecessary stress, can make the shape of the load transmittal optimized of sening as an envoy to.
According on the other hand, provide one hold the rotor shaft of wind turbine bearing housing.Said bearing housing comprises a flange of the mainframe that is used for connection bearing case and wind turbine.Said flange has and bearing housing is attached at one on the mainframe connects the surface.The flange of said bearing housing comprises the part with curvature.
This aspect can realize improving the more linkage surface area to the load transmission of mainframe equally.
According on the other hand, said bearing housing is suitable for holding two bearings.Generally, these bearings are a location bearing and a floating bearing.In a casing, have two bearings and can obtain compact wind turbine design.
According on the other hand, for the wind turbine in 1MW and the 4MW scope, flange has perpendicular to the thickness less than 120mm that connects the surface.Generally, this thickness is between 60mm and the lOOmm.Reduce the load that acts on the independent load transmission point, can realize the strength of materials that reduces.Therefore, can reduce element weight.
According on the other hand, a mainframe is provided, it comprises a flange that is used to connect mainframe and bearing housing.The flange of said mainframe is configured to meet the above arbitrary characteristics of describing with regard to bearing housing.
According on the other hand, a wind turbine is provided, it comprises that a pylon, of definition z axle transfers to and define a rotor shaft of x axle.The axis of rotor shaft is positioned at y position y sAnd rotor shaft has radius r.In addition, also comprise a mainframe and a bearing housing that holds rotor shaft.Bearing housing comprises a flange that is used for connection bearing case and mainframe.Wherein, flange comprises that part is positioned at the z position below the rotor shaft and is positioned at y simultaneously sOne r and y sOne of the y position connects the surface between the+r.
According on the other hand, wind turbine comprises above bearing housing and the arbitrary characteristics described with regard to wind turbine.
The present invention also relates to make the method for the said equipment.This method comprises the method step of making said each characteristic of equipment.
Description of drawings
Specification with the bottom in, with reference to accompanying drawing, more specifically described of the present invention all with the disclosure that makes that those skilled in the art can embodiment of the present invention, comprising most preferred embodiment of the present invention, in said accompanying drawing:
Figure la shows the schematic side elevation of one embodiment of the invention;
Figure lb shows the view that the gear-box unilateral observation of embodiment's among the figure la bearing housing is arrived;
Fig. 2 shows the schematic survey view of another embodiment of the present invention;
Fig. 3 shows the side view of another embodiment of the present invention, and wherein bearing housing links to each other with corresponding mainframe:
Fig. 4 shows another embodiment's of bearing housing schematic side elevation;
Fig. 5 shows the 3-D view on the connection surface of flange in the bearing housing;
Fig. 6 shows the structure of wind turbine.
Embodiment
Existing at length with reference to each embodiment of the present invention, one or more examples of embodiment have been shown in said figure.In following explanation and figure, identical label refers to similar elements.Through explanation of the present invention each example is provided, and each example can not be thought limitation of the present invention.For example, as the characteristic that embodiment's part is explained or described, can be used for other embodiments or be incorporated into and produce another embodiment with it.This means and the present invention includes such modification and variation.
Figure la and lb show bearing housing 10 according to an embodiment of the invention.Figure la is the schematic side elevation of bearing housing, and figure lb is from the observed view of plane A-A shown in the figure la.
Bearing housing comprises cast iron body 11.In addition, bearing housing comprises the opening 15 of the rotor shaft that is used to hold wind turbine.The axis of label 13 expression rotor shafts.
Main body 11 is formed can improve the transmission via the rotor axial mainframe of the load that obtained.Via flange 12 load is sent to mainframe.
As scheme shown in the lb, the surface of flange 12 reaches the rotor shaft right side with curved shape from rotor shaft opening left side.Therefore, flange 12 bendings are in the below of rotor shaft opening 15.The curved section of flange has the radius of 500mm at least, is generally between 1200mm and the 2000mm.When from the top view of bearing housing, the shape of flange 12 comprises the part that is positioned at below the rotor shaft.
Flange 12 is formed single-piece (one piece), connects surface area so that increase.Owing to increased surface area, made that the load on the flange reduces.Load is sent to mainframe effectively, and this will illustrate in greater detail with reference to Fig. 3.
Prior art system generally has one or two flange in each side of rotor shaft; Flange is used for connection bearing case and mainframe.Therefore, some the needs discrete and part can transmit load.The Load distribution at discrete point place need increase the strength of materials, especially for the wind turbine that produces a few megawatt power.
As scheme shown in la and the lb, the magnification region on the connection surface of the flange 12 of bearing housing 10 has the improvement characteristic that load is sent to the wind turbine mainframe.Therefore, flange thickness d can reduce to 70 and 90mm between a value.
The area that connects the surface can increase, and this is not limited to specific embodiments.Generally, this area is at least 1.5 ㎡.That is, as an example, said area can be between 2 ㎡ and 4 ㎡.
From figure la and lb, can find out further that rotor stop body (stop body) 14 directly links to each other with the main body 11 of bearing housing 10.Rotor stop body 14 is used to guide arresting stop under the situation that rotor should not rotate, to block rotor.For example, this can be the situation that wind turbine is in dead status in safeguarding or maintaining.In this embodiment, shown in figure la and lb, rotor stop body 14 is cast into a single-piece with the bearing housing main body., rotor stop body also can be installed on the bearing housing.
From embodiment shown in Figure 2, can find out other details.Wherein show and scheme the suitable bearing housing 10 of la middle (center) bearing case.Following explanatory drawing 2 and figure la difference relatively.
Fig. 2 shows two bearings that are included in the bearing housing 10.Both hold rotor shaft positioning bearing 21 and floating bearing 22.Positioning bearing and floating bearing are all placed in the bearing housing, can in gear-box, remove bearing from.Therefore, closely place together two bearings of (about 1m to 2m) to take less space in a casing.This has obtained the selection scheme of the more compact design of wind turbine nacelle.
Can be not limited to specific embodiments equally and are assemblings and safeguard opening 23 by other details shown in the Fig. 2 that uses.Bearing housing main body 11 is cast into for having an opening 23, so that can be more easily near being contained in bearing and the rotor shaft in the bearing housing in assembling or maintenance process.
Below will be with reference to Fig. 3.Wherein, show the bearing housing 10 that is connected to mainframe 30.Bearing housing 10 comprises bearing housing main body 11 and flange 12.In addition, also comprise rotor stop body 14.Rotor shaft 33 is arranged in bearing housing.
The flange 12 of bearing housing links to each other with the corresponding flange 32 of mainframe.Main frame body 31 is shaped as equally reposefully will be sent to pylon owing to the load that wind obtains.Bearing housing main body 11 limits a kind of layout with main frame body.This layout is best for load being sent to tower head (tower head), and said tower head links to each other with mainframe at tower head flange 35 places.
Separating of main frame body 31 and bearing housing main body 11, and other factors, brought following advantage.At first, can more easily make this two cast components.Secondly, can more easily transport individual component.The 3rd, can simplify the assembling and the maintenance of wind turbine.
Yet for little wind turbine, bearing housing and mainframe can be cast as single-piece.Thereby, can reduce the interference that load is transmitted.
Assembling device 34 shown in Fig. 3 is used for the gear-box of wind turbine is assembled into mainframe.And then the transverse force that acts on the gear-box also can be obtained by mainframe.Therefore, strong or load (for example being transmitted) through rotor shaft 33 can be transferred into tower head through flange 35.
Another embodiment has been shown among Fig. 4.The difference of the comparison of this bearing housing and Fig. 2 below is described.The bearing housing 10 of Fig. 4 has the flange that comprises two section 12a and 12b.These sections have side-play amount.In order to confirm the characteristic of this segmentation flange with simple mode, can use a mean level of the sea.This plane is represented with label 41 in Fig. 4.
In Fig. 5, can observe flange 12 in more detail and be connected the surface.Fig. 5 shows the 3-D view of observing from flange 12 bottoms.The flange of bearing housing has the connection surface of explaining hereinafter.On the one hand, flange 12 comprises a curved surface 51.On the other hand, connect the surface and comprise that two two arm shapes towards curved surface 51 inside region connect surface 52.
In this embodiment, the connection surface of flange is continuous.That is to say that the contact between the connection surface of flange and the connection surface of companion flange is continuous.Therefore, this invention aspect that connects continuously the surface is interpreted as comprising owing to groove or recess are less relatively small discontinuous.This continuous surface on the whole should be for quasi-continuous.
All Ranges with flange of continuous surface has the opening that one or two rows are used for securing means.The securing means that is fit to of similar pin or rivet etc. can pass the respective openings in the counterpart (counterpiece) of these openings and bearing housing flange.Said counterpart can be the flange of mainframe.The curved section that connects surface 51 has and is arranged in opening on the buckling curve, that be used for securing means.This curve has the radius of 500mm at least.
Fig. 5 shows typical three rotor blade gear wind turbine, and it can use above-mentioned bearing housing., bearing housing can be integrated in the wind turbine of any horizontal rotor shaft.Said wind turbine comprises the cabin 102 that is arranged on by on the pylon 100 of base supports.Cabin 102 holds the chain that is used for the rotation transmission of rotor 106 is given the live axle 118 of generator 114.Chain comprises rotor 106 is connected to gear-box 112 so that increase the live axle 118 rotor rotated axles 1 04 of generator 114.Live axle 118 so-called high speed shafts and rotor shaft 104 is known as lower velocity shaft.Rotor shaft 104 links to each other with the hub 108 of rotor, and said hub supports three rotor blades 110 usually.Gear-box can be removed selectively, links to each other with generator 114 directly to make rotor 1 06.This structure is known as direct driving generator.Generator 114 is admitted to electrical network through the electrical network connector 126 that has used the electric installation such as frequency converter and/or transformer via cable 124.Electric energy also can directly directly be consumed by consumption device, and is not admitted to public electric wire net.
In Fig. 6, show z axle by the pylon definition.X axle by the rotor shaft definition is substantially perpendicular to the z axle.That is, the angle between pylon (z axle) and the rotor shaft (x axle) is 90 oWith 100 oBetween.The y-axle is perpendicular to the X-Z plane.Below according to these system of coordinates explanation bearing housing 10.If the axis of rotor shaft is positioned at y-position 0 and rotor shaft has radius r, then the flange of bearing housing is positioned at the Z-position of rotor shaft below at least in part.The y-position of same parts between-r and r.
When the air stream 116 that gets into rotated rotor 106, the kinetic energy of wind was converted into the energy of rotation of rotor 106 and sends generator to through chain, and this generator converts energy of rotation to electric energy at last.
The usefulness of wind turbine depends on a lot of parameters, and it comprises the orientation in cabin, or specifically, comprises the position of rotor plane with respect to airflow direction.This is generally controlled by flat pendulum driver (yaw drive) or azimuth driver, and it is orientated kibli with the cabin.In the wind turbine, flat pendulum driver is made up of electricity component and mechanical component in modern times.Particularly, the high-speed drive motor of electricity is coupled through gear reducer, and said gear reducer has the driving pinion with the gearwheel engagement.Usually, electric drive motor, gear reducer and driving pinion all are installed on the platen (bedplate) in cabin, and gearwheel is fixed on the pylon 100.In order to control flat pendulum driver, used the wind detection sensor that to measure wind direction.
Similarly structure is applicable to the blade pitch drives 107 of the inclination (pitch) that is used to regulate each rotor blade 106.This influences the efficient of wind turbine equally significantly.
For the wind turbine of above-mentioned three rotor blade, blade pitch system comprises three blade pitch drives and three power controllers.Generally, power control module be set in the hub, blade pitch drives near.
Except that sending generator to and being converted into the energy of rotation of electric energy, also have other loads and masterpiece to be used for system.The load and the power that act on the rotor shaft 1 04 are imported bearing housing into through bearing.Load imports pylon and pedestal 128 into through tower head.The load transmission needs the element of enough strengths of materials.Therefore, need pay close attention to the adpting flange between the individual component.The bearing housing of having described in detail with reference to figure la to Fig. 3 10 can realize that with mainframe 30 and flange thereof best load transmits.
Therefore, although described the present invention in detail, be to be understood that under the situation of spirit that does not deviate from accompanying claims and scope and can carry out various modifications in the present invention.
Label list
10 bearing housings
11 bearing housing main bodys
12 flanges (bearing housing)
The axis of 13 roller axles
14 roller stop members
15 rotor shaft openings
21 clutch shaft bearings
22 second bearings
23 assemble/safeguard opening
30 mainframes
31 main frame body
32 mainframe flanges
33 rotor shafts
34 gear-box assembling device
35 are used for the mainframe flange of tower head
41 connect the mean level of the sea on surface
The connection surface of 51 bendings
52 arm shapes connect the surface
53 are used for the opening of securing means
100 pylons
102 cabins
104 rotor shafts
106 rotors
107 tilt drive
108 hubs
110 rotor blades
112 gear-boxes
114 generators
116 air-flows
The live axle of 118 generators
124 cables
126 electrical network connectors
128 pedestals

Claims (2)

  1. One be used to hold the rotor shaft of wind turbine bearing housing, it comprises:
    Be used to a flange that said bearing housing is connected with the mainframe of said wind turbine;
    Said flange has can be by an average connection surface, a plane, and said plane is with respect to axis tilt at least 200 angles of said rotor shaft.
  2. 2. bearing housing according to claim 1, wherein
    When from the top view of said bearing housing, at least a portion on said connection surface is positioned at
    Below the said rotor shaft.
CN2010105547469A 2010-11-23 2010-11-23 Novel bearing box Pending CN102477958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105547469A CN102477958A (en) 2010-11-23 2010-11-23 Novel bearing box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105547469A CN102477958A (en) 2010-11-23 2010-11-23 Novel bearing box

Publications (1)

Publication Number Publication Date
CN102477958A true CN102477958A (en) 2012-05-30

Family

ID=46090701

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105547469A Pending CN102477958A (en) 2010-11-23 2010-11-23 Novel bearing box

Country Status (1)

Country Link
CN (1) CN102477958A (en)

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C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120530