CN109139718A - 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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- CN109139718A CN109139718A CN201811232266.3A CN201811232266A CN109139718A CN 109139718 A CN109139718 A CN 109139718A CN 201811232266 A CN201811232266 A CN 201811232266A CN 109139718 A CN109139718 A CN 109139718A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 31
- 238000007667 floating Methods 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims description 30
- 239000004753 textile Substances 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention 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, the inside of bearing block is equipped with seam allowance circle, 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 present invention, as thrust bearing, can bear all axial loads of impeller transmitting by 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 present invention relates to wind generator set main shafts to hold technical field, drives master more particularly to a kind of low wind speed large size double-fed half is straight
Bearning 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.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanisms, can
The axial load and radial load of good carrying impeller side, improve the reliability of base bearing and Wind turbines, to overcome existing
Some wind generator set main shafts hold the deficiency of mechanism.
In order to solve the above technical problems, the present invention 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 are set, and the thrust bearing uses self-aligning thrust roller bearing.
As an improvement of the present invention, the floating bearing uses double row spherical roller bearing, double-row conical axis
Any one of hold with 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 present invention has at least the following advantages:
The present invention, as thrust bearing, can utilize its very strong axial carrying energy by using self-aligning thrust roller bearing
Power, for bearing all axial loads of impeller transmitting；Its good aligning performance can be utilized again, and main shaft is overcome to be easily deformed
Problem.
The present invention uses special integrated bearing composite structure, carries leaf respectively by thrust bearing and floating bearing
The axial load and radial load for taking turns side, improve the reliability of base bearing and Wind turbines, extend the longevity of base bearing mechanism
Life.
The present invention, which passes through, shares a bearing block, it is ensured that two bearings it is coaxial, avoid Separable bearing block from installing
The two base bearing out-of-alignment problems occurred with foozle；Two Bearing inner cavitys communicate simultaneously, and when greasing can pass through
Greasing operates while two bearings are realized in one greasing hole, convenient for lubricating oil product sampling and artificial greasing operation.
The structure characteristics of compact layout of base bearing mechanism of the present invention, reduces production cost, improves the reliability of unit, ensures
Generated energy.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention 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 floating bearing and thrust bearing of the present invention 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.
Base bearing mechanism of the present invention can be used not only for low wind speed large size double-fed fan motor unit, moreover it can be used to large-scale semi-direct driving wind
Motor group has the advantages that compact-sized, reliable for operation, Generation Rate height, at low cost.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
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 |
|---|---|---|---|
| CN201811232266.3A CN109139718A (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 |
|---|---|---|---|
| CN201811232266.3A CN109139718A (en) | 2018-10-22 | 2018-10-22 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109139718A true CN109139718A (en) | 2019-01-04 |
Family
ID=64809316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811232266.3A Pending CN109139718A (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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| Country | Link |
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| CN (1) | CN109139718A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489267A (en) * | 2021-06-30 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Large synchronous motor rotor axial thrust mounting process |
| CN113757045A (en) * | 2021-08-20 | 2021-12-07 | 浙江运达风电股份有限公司 | Large double-fed wind turbine generator system with integrated bearing seat |
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|---|---|---|---|---|
| CN201515291U (en) * | 2009-09-29 | 2010-06-23 | 沈阳华创风能有限公司 | Direct-drive wind generator |
| CN101839218A (en) * | 2009-09-29 | 2010-09-22 | 沈阳华创风能有限公司 | Direct-drive wind generating set |
| CN201884219U (en) * | 2010-12-15 | 2011-06-29 | 北车风电有限公司 | Integral bearing block type wind driven generator low-speed shaft transmission system with double bearings |
| CN102502423A (en) * | 2011-10-14 | 2012-06-20 | 三一集团有限公司 | Crane for offshore wind turbine installation vessel |
| CN203272023U (en) * | 2013-04-27 | 2013-11-06 | 沈阳华创风能有限公司 | Connecting structure of cabin under frame and main shaft |
| WO2016008958A1 (en) * | 2014-07-16 | 2016-01-21 | Aktiebolaget Skf | Bearing arrangement for a tidal current power plant |
| CN209026030U (en) * | 2018-10-22 | 2019-06-25 | 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 |
-
2018
- 2018-10-22 CN CN201811232266.3A patent/CN109139718A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201515291U (en) * | 2009-09-29 | 2010-06-23 | 沈阳华创风能有限公司 | Direct-drive wind generator |
| CN101839218A (en) * | 2009-09-29 | 2010-09-22 | 沈阳华创风能有限公司 | Direct-drive wind generating set |
| CN201884219U (en) * | 2010-12-15 | 2011-06-29 | 北车风电有限公司 | Integral bearing block type wind driven generator low-speed shaft transmission system with double bearings |
| CN102502423A (en) * | 2011-10-14 | 2012-06-20 | 三一集团有限公司 | Crane for offshore wind turbine installation vessel |
| CN203272023U (en) * | 2013-04-27 | 2013-11-06 | 沈阳华创风能有限公司 | Connecting structure of cabin under frame and main shaft |
| WO2016008958A1 (en) * | 2014-07-16 | 2016-01-21 | Aktiebolaget Skf | Bearing arrangement for a tidal current power plant |
| CN209026030U (en) * | 2018-10-22 | 2019-06-25 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489267A (en) * | 2021-06-30 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Large synchronous motor rotor axial thrust mounting process |
| CN113757045A (en) * | 2021-08-20 | 2021-12-07 | 浙江运达风电股份有限公司 | Large double-fed wind turbine generator system with integrated bearing seat |
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