CN209026030U - A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism - Google Patents
A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism Download PDFInfo
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- CN209026030U CN209026030U CN201821712503.1U CN201821712503U CN209026030U CN 209026030 U CN209026030 U CN 209026030U CN 201821712503 U CN201821712503 U CN 201821712503U CN 209026030 U CN209026030 U CN 209026030U
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Abstract
The utility model discloses a kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism, including floating bearing and thrust bearing, thrust bearing uses self-aligning thrust roller bearing.Floating bearing and thrust bearing share a bearing block, seam allowance circle is equipped on the inside of bearing block, floating bearing and thrust bearing are separately positioned on seam allowance circle two sides, there are gaps on the outside of seam allowance circle and main shaft, the inner ring of floating bearing and thrust bearing is interference fitted with main shaft, its outer ring cooperates with bearing block medial gap, and the gap between floating bearing and bearing block is less than the gap between thrust bearing and bearing block.The utility model, as thrust bearing, can bear all axial loads of impeller transmitting using self-aligning thrust roller bearing；It can overcome the problems, such as that main shaft is easily deformed again.Also by using bearing combined structure, guarantee two coaxial bearings, and guarantees that two Bearing inner cavitys communicate, it is convenient for safeguarding, the reliability of base bearing and Wind turbines is improved, the service life of base bearing mechanism is extended.
Description
Technical field
The utility model relates to wind generator set main shafts to hold technical field, straight more particularly to a kind of low wind speed large size double-fed half
Drive base bearing mechanism.
Background technique
Main shaft bearing is one of core component of Wind turbines, and operating condition is special, and application environment is severe, once it loses
Effect, will cause the component costs and renewal cost of great number, while influencing generated energy.
Existing wind generator set main shaft is held generally using double row spherical roller bearing, main reason is that the class bearing have with
Lower advantage: 1) radial bearing capacity is strong；2) two bearings seat rigging error and main shaft deflection deformation be can compensate for, without increasing bearing negative
Load；3) it can compensate for the thermal expansion in the base bearing course of work；4) it assembles, dismantle simply；5) bearing cost of layout is low；6) for many years at
Ripe application experience.And the wind-powered electricity generation overall design quotient of existing mainstream generally uses following two structure:
(1) three-point support structure of " double row spherical roller bearing 3+ gear-box toggle 4 ", as shown in Fig. 1.This 3 points
In support construction, only one base bearing 3 undertakes radial load Fr while undertaking impeller side axial load Fa, the class bearing
3 have very big radial bearing capacity, but axial carrying capacity is poor.When axial load Fa is larger, often there is base bearing 3
There is premature wear failure in single-row loaded situation, the single-row loaded bearing that will cause, and actual life is not able to satisfy design and wants
It asks.
(2) the two o'clock support construction of " double row spherical roller bearing 3+ double row spherical roller bearing 3 ' ", as shown in Fig. 2.
In the two o'clock support construction, the spheric roller bearing 3 of impeller side is floating bearing, mainly undertakes impeller side radial load, another
A double row spherical roller bearing 3 ' is thrust bearing, while for undertaking partially radially load, it is also necessary to undertake very big axis
Similar with three-point support structure to load, thrust bearing is easy to appear single-row loaded, and then leads to initial failure.
Based on above-mentioned analysis it is found that base bearing axial carrying capacity is insufficient in existing structure, and to bearing axial carrying
Capability Requirement is very high, and since space, price limit axial bearing capacity cannot unidirectionally amplify, to solve the above problems, the application
A kind of new low wind speed large size double-fed Ban Zhiqu base bearing mechanism is proposed, it is made to be not only suitable for large-scale double-fed fan motor unit,
Suitable for large-scale half direct-drive unit, and can the good axial load and radial load for carrying impeller side, raising base bearing and wind
The reliability of motor group.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanisms, make
The axial load and radial load of the good carrying impeller side of its energy, improve the reliability of base bearing and Wind turbines, thus gram
Take the deficiency that existing wind generator set main shaft holds mechanism.
In order to solve the above technical problems, the utility model provides a kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism,
Including floating bearing and thrust bearing on the outside of main shaft is arranged in, the thrust bearing uses self-aligning thrust roller bearing.
As a kind of improvement of the utility model, the floating bearing uses double row spherical roller bearing, double row tapered roller
Any one of sub- bearing and Biserial cylindrical roller bearing.
It is further improved, the floating bearing and thrust bearing share a bearing block, and the inside of the bearing block is equipped with
Seam allowance circle, the floating bearing and thrust bearing are separately positioned on the two sides of the seam allowance circle, the seam allowance circle and the main shaft
Outside there are gap,
The inner ring of the floating bearing and thrust bearing is interference fitted with the main shaft, the floating bearing and thrust shaft
The outer ring held cooperates with the bearing block medial gap, and the gap between the floating bearing and bearing block is less than described stop
Gap between thrust bearing and bearing block.
It is further improved, the impeller side of the seam allowance circle is arranged in the thrust bearing, and the floating bearing is arranged in institute
State the gear box side of seam allowance circle.
It is further improved, the rigidity of frame of the bearing block and Wind turbines connects.
Be further improved, the two sides of the bearing block are provided with sealing mechanism, the sealing mechanism include end cover,
Sealing ring and the sealing ring being arranged between the end cover and sealing ring, the end cover are bolted on bearing
On seat, the sealing ring and main shaft are interference fitted, and the sealing ring is embedded on the end cover and sealing loop interface
In seal groove.
It is further improved, the sealing ring is using any one of textile rubber oil seals, V-seal and labyrinth seal.
It is further improved, the gear box side of the seam allowance circle is arranged in the thrust bearing, and the floating bearing setting exists
The impeller side of the seam allowance circle.
It is further improved, the floating bearing and thrust bearing are provided separately, and the floating bearing is positioned close to impeller
Side, the thrust bearing are positioned close to gear box side.
It is further improved, the self-aligning thrust roller bearing is without end-play.
By adopting such a design, the utility model at least has the following advantages:
The utility model, as thrust bearing, can be held by using self-aligning thrust roller bearing using its very strong axial direction
Loading capability, for bearing all axial loads of impeller transmitting；Its good aligning performance can be utilized again, and main shaft is overcome to be easy to become
The problem of shape.
The utility model uses special integrated bearing composite structure, is held respectively by thrust bearing and floating bearing
The axial load and radial load for carrying impeller side, improve the reliability of base bearing and Wind turbines, extend base bearing mechanism
Service life.
The utility model, which passes through, shares a bearing block, it is ensured that two bearings it is coaxial, avoid Separable bearing block
Two base bearing out-of-alignment problems that installation and foozle occur；Two Bearing inner cavitys communicate simultaneously, and when greasing can
Greasing operates while realizing two bearings by a greasing hole, convenient for lubricating oil product sampling and artificial greasing operation.
The structure characteristics of compact layout of the utility model base bearing mechanism, reduces production cost, improves the reliability of unit,
Generated energy is ensured.
Detailed description of the invention
Above-mentioned is only the general introduction of technical solutions of the utility model, in order to better understand the technology hand of the utility model
Section, below in conjunction with attached drawing, the utility model is described in further detail with specific embodiment.
Fig. 1 is the base bearing structural scheme of mechanism in existing Wind turbines with three-point support structure.
Fig. 2 is the base bearing structural scheme of mechanism in existing Wind turbines with two o'clock support construction.
Fig. 3 is the schematic diagram that the utility model floating bearing and thrust bearing are an integral structure.
In figure, 1, main shaft, 2, gear-box, 3, double row spherical roller bearing, 4, gear-box toggle, 5, floating bearing, 6,
Thrust bearing, 7, bearing block, 8, rack, 9, end cover, 10, sealing ring, 11, sealing ring, 12, impeller, 13, seam allowance circle, 14,
Gap between seam allowance circle and main shaft.
Specific embodiment
Referring to shown in attached drawing 3, the present embodiment wind generator set main shaft holds mechanism, the floating axle including 1 outside of main shaft is arranged in
Hold 5 and thrust bearing 6.Specifically, the floating bearing 5 is using double row spherical roller bearing, double row tapered roller bearing or biserial
Any one existing bearing arrangement such as cylinder roller bearing is mainly used for bearing the radial load that impeller 12 transmits.The thrust shaft
Hold 6 overcomes the load that 1 length of main shaft is long, bears to be easy greatly using self-aligning thrust roller bearing with good aligning performance
The deficiency of deformation, and the self-aligning thrust roller bearing is no end-play, has very strong axial carrying capacity, good can be held
All axial loads transmitted by impeller 12.
The floating bearing 5 and thrust bearing 6 share a bearing block 7, the bearing block 7 and Wind turbines in the present embodiment
Rack 8 is rigidly connected, for undertaking the axial load and radial load of impeller side.The inside of the bearing block 7 is equipped with seam allowance circle 13,
There are gaps 14 for the seam allowance circle 13 and 1 outside of main shaft.The floating bearing 5 and thrust bearing 6 are separately positioned on the seam allowance circle 13
Two sides.The impeller side of the seam allowance circle 13 is arranged in the thrust bearing 6 in the present embodiment, then the seam allowance circle 13 can be used for bearing leaf
Wheel 12 is transmitted to the axial load of thrust bearing 6；2 side of gear-box of the seam allowance circle 13 is arranged in the floating bearing 5.The gap 14
Floating bearing 5 and the internal cavity of thrust bearing 6 are communicated, is operated conducive to the greasing of bearing.
Specifically, the inner ring of the floating bearing 5 and thrust bearing 6 is interference fitted with the main shaft 1,5 He of floating bearing
The outer ring of thrust bearing 6 cooperates with 7 medial gap of bearing block, and the gap between the floating bearing 5 and bearing block 7 is less than
Gap between the thrust bearing 6 and bearing block 7, it is therefore an objective to guarantee that radial load acts predominantly on floating bearing 5.
The two sides of the bearing block 7 are provided with sealing mechanism, guarantee that Bearing inner lubricating grease does not leak.The sealer
Structure includes end cover 9, sealing ring 11 and the sealing ring 10 being arranged between the end cover 9 and sealing ring 11, the sealed end
Lid 9 is bolted on bearing block 7, and the sealing ring 11 and main shaft 1 are interference fitted, which is embedded in the sealed end
In seal groove on lid 9 and 11 contact surface of sealing ring.The sealing ring 10 is using textile rubber oil seals, V-seal or fan in the present embodiment
Any one sealing structure in palace sealing etc., has reached good grease sealing.
The working principle that above-mentioned wind generator set main shaft holds mechanism is as follows:
Floating bearing is being solely subjected to radial load, or bears the axial load (Fa/Fr≤1.5tan α) of very little simultaneously
When, bearing load service life L10Calculation formula are as follows:
L10=(Cr/Pr)10/3 (1)
Wherein: Pr=XFr+YFa； (2)
Fr is radial load；Fa is axial load；Cr is rated load；X and Y is design factor；X=1, Y=0.45tan
α is contact angle (11 ° are taken in this programme).
From formula (1) (2), it can be seen that, axial load Fa is bigger, and equivalent load Pr is bigger, the bearing load longevity being calculated
Order L10It is smaller.Axial load Fa is undertaken by thrust bearing 6 in the application, and floating bearing 5 is solely subjected to radial load substantially, so its
Compared with bearing the single spheric roller bearing structure of axial load and radial load structure simultaneously, longer life expectancy.
Certainly, the position of the thrust bearing 6 and floating bearing 5 can also mutually be replaced, i.e., thrust bearing 6 is arranged stops at this
The impeller side of the seam allowance circle 13 is arranged in the gear box side of mouth circle 13, the floating bearing 5.
Also, the floating bearing 5 and thrust bearing 6 can also be provided separately, i.e., connect respectively with a bearing block, distribution
It is positioned close to one end of impeller 12 in the two side ends of main shaft 1, such as floating bearing 5, which is positioned close to gear-box
2 one end.
The utility model base bearing mechanism can be used not only for low wind speed large size double-fed fan motor unit, moreover it can be used to which large size half is straight
Wind turbines are driven, there is the advantages that compact-sized, reliable for operation, Generation Rate height, at low cost.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, those skilled in the art make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above,
It falls within the protection scope of the present utility model.
Claims (10)
1. a kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism, which is characterized in that including the floating on the outside of main shaft is arranged in
Bearing and thrust bearing, the thrust bearing use self-aligning thrust roller bearing.
2. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 1, which is characterized in that the floating axle
It holds using any one of double row spherical roller bearing, double row tapered roller bearing and Biserial cylindrical roller bearing.
3. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 2, which is characterized in that the floating axle
It holds and shares a bearing block with thrust bearing, the inside of the bearing block is equipped with seam allowance circle, the floating bearing and thrust bearing
It is separately positioned on the two sides of the seam allowance circle, there are gap on the outside of the seam allowance circle and the main shaft,
The inner ring of the floating bearing and thrust bearing is interference fitted with the main shaft, the floating bearing and thrust bearing
Outer ring cooperates with the bearing block medial gap, and the gap between the floating bearing and bearing block is less than the thrust shaft
Hold the gap between bearing block.
4. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 3, which is characterized in that the thrust shaft
The impeller side that the seam allowance circle is set is held, the gear box side of the seam allowance circle is arranged in the floating bearing.
5. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 4, which is characterized in that the bearing block
It is connect with the rigidity of frame of Wind turbines.
6. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 4, which is characterized in that the bearing block
Two sides be provided with sealing mechanism, the sealing mechanism include end cover, sealing ring and setting the end cover with
Sealing ring between sealing ring, the end cover are bolted on bearing block, and the sealing ring is matched with main shaft interference
It closes, the sealing ring is embedded in the seal groove on the end cover and sealing loop interface.
7. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 6, which is characterized in that the sealing ring
Using any one of textile rubber oil seals, V-seal and labyrinth seal.
8. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 3, which is characterized in that the thrust shaft
The gear box side that the seam allowance circle is set is held, the impeller side of the seam allowance circle is arranged in the floating bearing.
9. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 2, which is characterized in that the floating axle
It holds and is provided separately with thrust bearing, the floating bearing is positioned close to impeller side, and the thrust bearing is positioned close to gear
Case side.
10. low wind speed large size double-fed Ban Zhiqu base bearing mechanism according to claim 1, which is characterized in that the thrust
Self-aligning roller bearing is without end-play.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821712503.1U CN209026030U (en) | 2018-10-22 | 2018-10-22 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821712503.1U CN209026030U (en) | 2018-10-22 | 2018-10-22 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN209026030U true CN209026030U (en) | 2019-06-25 |
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ID=66906858
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821712503.1U Active CN209026030U (en) | 2018-10-22 | 2018-10-22 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
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| CN (1) | CN209026030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139718A (en) * | 2018-10-22 | 2019-01-04 | 国电联合动力技术有限公司 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
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2018
- 2018-10-22 CN CN201821712503.1U patent/CN209026030U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139718A (en) * | 2018-10-22 | 2019-01-04 | 国电联合动力技术有限公司 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
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