CN201037448Y - Wind-driven generator group gearbox - Google Patents
Wind-driven generator group gearbox Download PDFInfo
- Publication number
- CN201037448Y CN201037448Y CNU2007201472236U CN200720147223U CN201037448Y CN 201037448 Y CN201037448 Y CN 201037448Y CN U2007201472236 U CNU2007201472236 U CN U2007201472236U CN 200720147223 U CN200720147223 U CN 200720147223U CN 201037448 Y CN201037448 Y CN 201037448Y
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- CN
- China
- Prior art keywords
- bearing
- hollow cylindrical
- cylindrical roller
- wind
- roller bearing
- 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.)
- Expired - Lifetime
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
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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
- F16C2360/00—Engines or pumps
- F16C2360/31—Wind motors
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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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
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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
Abstract
The utility model discloses a gearbox for wind turbine generator system. A bearing used in the gearbox is a hollow cylinder roller bearing. Preferentially, the hollow cylinder roller bearing comprises an outer cup, a hollow cylinder roller and an inner race, the hollow cylinder roller is a rolling body of the bearing and in the hollow cylinder roller bearing, the diameter of the inner raceway is slightly bigger than the diameter of an inscribed circle arranged on the rolling body of the outer cup raceway so as to realize interference fit between the inner raceway and the inscribed circle of the outer cup raceway rolling body. Compared with the prior solid cylinder roller bearing, the rolling body of the hollow cylinder roller bearing is a hollow roller which has better deforming capability and enables the interference fit by adopting slightly bigger diameter of the inner raceway than the diameter of the inscribed circle to realize full stress on the roller, extends the service life of the bearing, reducing bearing failure; the bearing is also capable of reducing the radial swing of the shaft and improving the cooling effect. Owning to the reasons, the gearbox for wind turbine generator system has long trouble-free service life.
Description
Technical field
The utility model relates to wind generating technology, especially relates to a kind of wind-driven generator group wheel box.
Background technique
Current, non-renewable energy resources such as oil, coal are day by day exhausted, and energy problem becomes the matter of utmost importance of puzzlement development of world economy, and the utilization of various renewable energy sourcess is come into one's own day by day.
Wind energy is a kind of extensively renewable energy sources of utilization that once obtained, and under current new energy situation, wind energy is developed the emphasis that becomes current renewable energy utilization, and utilizing wind energy power is the main means of current Wind Power Utilization.
Wind power generating set has obtained broad research.Wind power generating set uses large-scale wind wheel to obtain wind-force, drives generator for electricity generation, thereby realizes wind-power electricity generation.Because the rotational speed of wind wheel under the wind-force effect is slower, does not reach the needed rotating speed of generator for electricity generation far away, therefore, between wind wheel and generator, use the gear-box speed change, increasing than the slow-speed of revolution of wind wheel one side is sufficiently high rotating speed, drive generator for electricity generation.
Be subjected to the impact into irregular break-in varying duty wind-force effect and strong gusts of wind during wind power generating set work, stand the influence of scorching summer and freezing winter, the extreme temperature difference throughout the year, its operating conditions is very abominable.In addition, wind power generating set generally is installed in places such as high mountain, field, barren beach, island, and mounting base often has tens meters height, and its maintenance is extremely difficult.Therefore, to the reliability of wind power generating set with very high requirement is arranged working life, at present, the time between failures to wind power generating set required up to 20 years usually.In wind power generating set, gear-box is as the groundwork position, because complicated in mechanical structure is the highest parts of fault probability, thereby, also be to improve the wind power generating set reliability and the keypoint part in working life.To realize failure-free operation reaching in the vicennial time, each element of gear-box has all been proposed higher requirement.In addition, wind-driven generator group wheel box also needs to satisfy other job requirements of general gear-box.
Different wind power generating set has different gear-box forms, divides according to the transmission type, and gear-box can be divided into the gear-box that make up mutually cylindrical gears speedup box, planetary gearbox and they.No matter how concrete form changes, wind-driven generator group wheel box all has some running shafts, and the part that supports these running shafts is a bearing, in the prior art, in wind-driven generator group wheel box, generally uses rolling bearing.
Because bearing plays a supportive role to the rotation of axle, therefore, its work to gear-box has very big influence.At first, pivot friction is one of main source of gear-box capacity loss; Secondly, bearing also is main noise component; Even more important problem is that during gear-box work, the distortion of axle and bearing can cause the deflection of gear and Bearing gear and bearing enclose axis makes the load distribution of the gear teeth inhomogeneous, reduces the bearing capacity of driving component.When rotating speed was higher, also can sharply reduce the working life of bearing, becomes the primary component that influences the gear-box operating life.
Under the prior art, the structure of rolling bearing as shown in Figure 1.This rolling bearing comprises outer ring 11, roller 12, inner ring 13.The internal diameter of described outer ring 11 forms outer ring raceway, and the external diameter of inner ring 13 forms inner ring raceway.In addition, this rolling bearing and often have retaining clip (figure do not show).
As shown in Figure 1, the inner ring raceway diameter d of inner ring 13
1Diameter d 2 than the inscribed circle that is contained in the outer ring raceway rolling element is slightly little, is generally Spielpassung between the two.In this case, two to three rolling elements that generally only move to the bottom are stressed, the axis that adds Internal and external cycle can not overlap fully, this just makes axle constantly do circumferential swing by a small margin at work, make and occur uneven load between the gear teeth, reduced the bearing capacity of driving component, and because the inhomogeneous easier broken teeth that causes the gear teeth of load.And the periodicity stress alternation that bearing roller itself is altered a great deal causes reduce the fatigue life of bearing.
The model utility content
At above-mentioned defective, the technical problem that the utility model solves is, a kind of wind-driven generator group wheel box is provided, the rolling element of the rolling bearing of this kind gear-box is stressed evenly, can greatly reduce the circumferential swing of the axle that is supported, make between the gear teeth load comparatively even, the bearing capacity of driving component is increased, and can reduce the gear teeth and broken teeth occurs.In addition, rolling bearing fatigue life is effectively prolonged.
The wind-driven generator group wheel box that the utility model provides, the bearing that uses in its gear-box is hollow cylindrical roller bearing.
Preferably, described hollow cylindrical roller bearing comprises outer ring, hollow cylindrical roller and inner ring, and described hollow cylindrical roller is the rolling element of bearing.
Preferably, in the described hollow cylindrical roller bearing, the diameter of inner ring raceway is bigger slightly than the diameter of the inscribed circle that is contained in the outer ring raceway rolling element, realizes interference fit between the two.
Preferably, the outer ring of described hollow cylindrical roller bearing has rib, and inner ring does not have rib; Perhaps opposite, rib is not with in the outer ring of described hollow cylindrical roller bearing, and inner ring has rib.
Preferably, in the described hollow cylindrical roller bearing, roller does not have retaining clip.
Preferably, in the described hollow cylindrical roller bearing, rolling element is the hollow cylindrical roller of single-row, biserial or multiple row.
Preferably, has centre rib between each row of the rolling element of described hollow cylindrical roller bearing.
Preferably, between each row of the rolling element of described hollow cylindrical roller bearing centre rib is not set.
Preferably, in the described hollow cylindrical roller bearing, the hollowness of hollow cylindrical roller is 60%-70%.
The wind-driven generator group wheel box that the utility model provides uses hollow cylindrical roller bearing as its bearing.Because the rolling element of this bearing is a hollow cylindrical roller, compare with the solid cylinder roller bearing that prior art is used, the rolling element of hollow cylindrical roller bearing is a hollow roller, because inside is hollow structure, therefore, it has deformability preferably, make bearing generally can adopt the diameter interference fit form bigger slightly of inner ring raceway than the diameter of the inscribed circle that is contained in the outer ring raceway rolling element, so just can realize that full roller is stressed, and in the prior art, therefore general roller bearing, has only 3-5 grain roller stressed owing to can only use Spielpassung.By contrast, the bearing of the wind-driven generator group wheel box that the utility model provides has less contact stress, and its amplitude of variation is comparatively gentle, and the life-span of bearing is prolonged, thereby can reduce because the maintenance requirement that bearing fault causes.In addition, because above-mentioned interference structure, make the inner ring and the outer ring coaxality of hollow cylindrical roller bearing that very big raising be arranged, axle radially wobbles minimizing in movement process, can realize between the gear teeth cooperates more closely, and its motion thereby more steady makes between the gear teeth load comparatively even, the bearing capacity of driving component increases, and can reduce the gear teeth and broken teeth occurs.
Same the cylinder at its rolling element center can flow through cold oil, and cooling effect is significantly strengthened owing to use the hollow cylinder bearing, can avoid the especially rolling element of the bearing situation of at high temperature working of bearing.In addition,, can not contact lubricant oil is extruded, improve lubricated effect, help improving bearing life equally owing to the rigidity of rolling element and inner ring, outer ring owing to the deformability of hollow cylinder is strong.
In the preferred embodiment of the present utility model, use the bearing of the hollow cylindrical roller of two row or multiple row, the bearing of this form is owing to the roller with two row or multiple row supports, can adopt the roller of littler hollowness, further reduce the center offset of the original raceway of bearing, make axle can realize turning round more stably, improve the working life of bearing and gear.
Description of drawings
Fig. 1 is the structural representation of prior art rolling bearing;
Fig. 2 is the structural representation of the hollow cylindrical roller bearing of the utility model first embodiment employing.
Embodiment
The utility model is first embodiment provide a kind of wind-driven generator group wheel box.This gear-box can adopt multiple gear-box form, and for the utility model, its key point is to adopt special hollow cylindrical roller bearing, and under the prior art, the rolling bearing of wind-driven generator group wheel box all adopts solid cylindrical roller.
Fig. 2 illustrates the hollow cylindrical roller bearing that adopts in this kind wind-driven generator group wheel box.
As shown in Figure 2, this hollow cylindrical roller bearing comprises outer ring 21, hollow cylindrical roller 22, inner ring 23.The aperture surface of described outer ring 21 forms outer ring raceway, and the outer diametric plane of inner ring 23 forms inner ring raceway.Described outer ring 21 band ribs, inner ring 23 is not with rib.
Fig. 2 illustrates simultaneously, and the inner ring raceway diameter d 1 of inner ring 23 is bigger slightly than the diameter d 2 of the rolling element inscribed circle that is contained in outer ring raceway.This be because, rolling element has adopted hollow cylindrical roller, therefore this hollow cylindrical roller, has the certain elastic deformation amount owing to have hollowly.This elastic deformation amount makes between rolling element inscribed circle and the inner ring raceway can adopt interference fit.Under the prior art, owing to adopt the rolling element of solid cylinder roller as bearing, its elastic deformation amount is minimum, must adopt Spielpassung between rolling element inscribed circle and the inner ring raceway.
In this hollow cylindrical roller bearing, roller does not have retaining clip.This is because above-mentioned interference fit makes rolling element be subjected to certain prestressing force all the time, and therefore, roller can remain fixing position, does not need retainer to keep.
Hollow cylindrical roller bearing shown in Figure 2 adopts single-row roller, in fact can also use biserial or multiple row roller.When using biserial or multiple row roller,, can not use middle-grade limit between each roller if rolling element satisfies slenderness ratio L/D≤1.08 o'clock.
The hollowness of described hollow cylindrical roller, promptly the percentage of rolling element diameter of bore and the ratio of external diameter has certain requirement.If this hollowness is too small, as is lower than 50%, and then roller approaches solid roller; If hollowness is excessive, then roller is flexible excessive, and bearing capacity reduces.Therefore, preferably the hollowness scope is 60%-70% when adopting single-row roller, if adopt the multiple row roller, then this hollowness can suitably improve.
Although among this embodiment, adopt outer ring 21 band ribs, inner ring 23 is with the form of rib,, adopts opposite form, promptly a grade limit is not with in outer ring 21, and inner ring 23 band grade limits also are feasible schemes.
Owing to adopt hollow cylindrical roller, make hollow cylindrical roller bearing compared with prior art have remarkable advantages, particularly in the blower fan gear-box, the accident-free duration of original paper is had high requirements, and the operating conditions very severe, this hollow cylindrical roller bearing has remarkable advantages.
At first, this kind hollow cylindrical roller bearing has higher rigidity under rated load.This be because, can adopt interference fit between the rolling element inscribed circle of hollow cylindrical roller bearing and the inner ring raceway, under this fit system, when load was in normal scope, all rolling elements all played the carrying effect.And the solid cylinder roller bearing of prior art when load is in normal range (NR), generally has only two, three rollers to be in loaded state, so its rigidity is on the contrary not as hollow cylindrical roller bearing.Owing to have better rigidity, the longer service life of the hollow cylindrical roller bearing that the utility model provides.
Secondly, this kind hollow cylindrical roller bearing can provide higher rotating accuracy.Because generally speaking, adopt interference fit between the rolling element inscribed circle of hollow cylindrical roller bearing and the inner ring raceway, therefore, do not have radial clearance between the each several part of bearing, so just guaranteed the rotating accuracy of institute's back shaft.There are some researches show that adopt the part of same size precision to assemble, then the rotating accuracy of hollow cylindrical roller bearing is than the high two-stage of precision of solid roller bearing.As long as control the machining accuracy of part and suitable design parameter well, be easy to make the main shaft diameter pendulum less than 1 μ m.Because main shaft diameter pendulum is low, each other impact reduces during the gear movement installed on the main shaft, can reduce the generation of broken teeth.
Once more, this kind hollow cylindrical roller bearing can reach higher limit speed.This be because, the main cause of restriction rotating speed is a temperature, adopt hollow cylindrical roller bearing after because underlying cause can reduce producing following material impact to the lubricated and temperature of bearing.
A, hollow rolling element in light weight, its centrifugal force is corresponding lower;
The surface area of b, hollow rolling element is big, and cool condition is good;
C, owing to adopt interference fit, can impracticable retainer, reduced thermal source, lubricant oil can be fully mobile in bearing, can play better cooling effect;
D, interference structure cause prestressed existence, make rolling element be difficult for sliding, and keep stable gap to each other, are convenient to heat radiation;
E, hollow rolling element flexibility are better, can form oil film in the rolling, and oil can not extruded, and will play lubrication effect preferably like this, reduce friction and give birth to heat.
In a word, for above-mentioned reasons, the wind-driven generator group wheel box that present embodiment provides can better meet the operating conditions and the failure free time requirement of wind power generating set, has better technique effect.
Need explanation in addition, in the hollow cylindrical roller bearing that the utility model first embodiment provides, adopt interference fit between rolling element inscribed circle and the inner ring raceway, this fit form can be given full play to the advantage of this kind bearing.But, do not get rid of the mode of using transition fit or Spielpassung, adopt above-mentioned fit system, because the surface area of rolling element is big, can obtain better cooling effect.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. a wind-driven generator group wheel box is characterized in that, the bearing that uses in this gear-box is hollow cylindrical roller bearing.
2. wind-driven generator group wheel box according to claim 1 is characterized in that described hollow cylindrical roller bearing comprises outer ring, hollow cylindrical roller and inner ring, and described hollow cylindrical roller is the rolling element of bearing.
3. wind-driven generator group wheel box according to claim 2 is characterized in that, in the described hollow cylindrical roller bearing, the diameter of inner ring raceway is bigger slightly than the diameter of the inscribed circle that is contained in the outer ring raceway rolling element, realizes interference fit between the two.
4. wind-driven generator group wheel box according to claim 3 is characterized in that the outer ring of described hollow cylindrical roller bearing has rib, and inner ring does not have rib.
5. wind-driven generator group wheel box according to claim 3 is characterized in that rib is not with in the outer ring of described hollow cylindrical roller bearing, and inner ring has rib.
6. according to each described wind-driven generator group wheel box of claim 1-5, it is characterized in that in the described hollow cylindrical roller bearing, roller does not have retaining clip.
7. according to each described wind-driven generator group wheel box of claim 1-5, it is characterized in that in the described hollow cylindrical roller bearing, rolling element is the hollow cylindrical roller of single-row, biserial or multiple row.
8. wind-driven generator group wheel box according to claim 7 is characterized in that, has centre rib between each row of the rolling element of described hollow cylindrical roller bearing.
9. wind-driven generator group wheel box according to claim 7 is characterized in that, between each row of the rolling element of described hollow cylindrical roller bearing centre rib is not set.
10. according to each described wind-driven generator group wheel box of claim 1-5, it is characterized in that in the described hollow cylindrical roller bearing, the hollowness of hollow cylindrical roller is 60%-70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201472236U CN201037448Y (en) | 2007-05-15 | 2007-05-15 | Wind-driven generator group gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201472236U CN201037448Y (en) | 2007-05-15 | 2007-05-15 | Wind-driven generator group gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201037448Y true CN201037448Y (en) | 2008-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201472236U Expired - Lifetime CN201037448Y (en) | 2007-05-15 | 2007-05-15 | Wind-driven generator group gearbox |
Country Status (1)
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| CN (1) | CN201037448Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102016736A (en) * | 2008-04-29 | 2011-04-13 | 诺迈士科技有限公司 | Methods, apparatus and computer readable storage mediums for model-based diagnosis of gearboxes |
| CN102197219A (en) * | 2008-08-29 | 2011-09-21 | 温纳吉股份公司 | Wind power plant transmission and auxiliary drive for a wind power plant transmission |
| US9467076B2 (en) | 2013-05-21 | 2016-10-11 | Delta Electronics, Inc. | Position limiting device and control method |
| CN108533608A (en) * | 2018-06-25 | 2018-09-14 | 中国航发哈尔滨轴承有限公司 | A kind of single-row roller and ball composite bearing |
| CN111664175A (en) * | 2020-03-18 | 2020-09-15 | 张子生 | Rolling bearing with cylindrical hollow rolling body |
-
2007
- 2007-05-15 CN CNU2007201472236U patent/CN201037448Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102016736A (en) * | 2008-04-29 | 2011-04-13 | 诺迈士科技有限公司 | Methods, apparatus and computer readable storage mediums for model-based diagnosis of gearboxes |
| CN102016736B (en) * | 2008-04-29 | 2015-09-16 | 诺迈士科技有限公司 | Gearbox model formula diagnostic method, instrument |
| CN102197219A (en) * | 2008-08-29 | 2011-09-21 | 温纳吉股份公司 | Wind power plant transmission and auxiliary drive for a wind power plant transmission |
| CN102197219B (en) * | 2008-08-29 | 2014-09-24 | 西门子公司 | Wind power plant transmission |
| US9467076B2 (en) | 2013-05-21 | 2016-10-11 | Delta Electronics, Inc. | Position limiting device and control method |
| CN108533608A (en) * | 2018-06-25 | 2018-09-14 | 中国航发哈尔滨轴承有限公司 | A kind of single-row roller and ball composite bearing |
| CN111664175A (en) * | 2020-03-18 | 2020-09-15 | 张子生 | Rolling bearing with cylindrical hollow rolling body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING JINGYE ROLLING MILL BEARING MANUFACTURE CO Free format text: FORMER OWNER: LUO JIANG Effective date: 20100514 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100054 ROOM 2A609, NO.A88, CAIHUYING EAST STREET, FENGTAI DISTRICT, BEIJING CITY TO: 102600 NO.5, SHENGYU STREET, HUANGCUN TOWN, DAXING DISTRICT, BEIJING CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100514 Address after: 102600 Daxing District, Beijing Huang Village street, No. 5 Patentee after: Beijing Jingye Bearing Manufacture For Rolling Mills Co.,Ltd. Address before: 100054, No. 88, East Street, Beijing, Fengtai District, 2A609 Patentee before: Luo Hong |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 102600 Daxing District, Beijing Huang Village street, No. 5 Patentee after: Beijing Jingye bearing Limited by Share Ltd Address before: 102600 Daxing District, Beijing Huang Village street, No. 5 Patentee before: Beijing Jingye Bearing Manufacture For Rolling Mills Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080319 |