CN216430286U - Bearing roller, bearing and wind driven generator - Google Patents
Bearing roller, bearing and wind driven generator Download PDFInfo
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- CN216430286U CN216430286U CN202122984476.1U CN202122984476U CN216430286U CN 216430286 U CN216430286 U CN 216430286U CN 202122984476 U CN202122984476 U CN 202122984476U CN 216430286 U CN216430286 U CN 216430286U
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Abstract
The utility model relates to the technical field of bearings, a bearing roller, bearing and aerogenerator are provided, wherein, the bearing roller is including the roller body that is revolution solid structure, roller body's generating line is including the straightway that is located the middle part and being located the segmental arc at straightway both ends, the plain line fitting of straightway and raceway curved surface, the first end of segmental arc with straightway smooth connection, the segmental arc with distance between roller body's the axis is followed the direction of segmental arc first end to second end reduces gradually, the second end of segmental arc with roller body's terminal surface is tangent. So set up, solved in the prior art through bearing roller of modification easily produce in the bearing and rock the problem that the bearing operation is unstable that leads to.
Description
Technical Field
The utility model relates to a bearing technical field especially relates to a bearing roller, bearing and aerogenerator.
Background
The variable pitch bearing is used for being installed between a blade and a hub of the wind driven generator, and an inner ring and an outer ring of the variable pitch bearing are respectively connected with the blade and the hub through connecting bolts, so that the blade can rotate around the axis of the blade, and the purpose of changing the pitch is achieved. At present, a variable pitch bearing of a wind turbine generator adopts three rows of column bearings, and rollers of the three rows of column bearings are generally cylindrical rollers.
In order to avoid excessive stress concentration at the end part of the roller, the roller needs to be modified. However, in the prior art, the roller after the modification is easy to shake in the bearing, so that the bearing is unstable under the action of external load.
Therefore, how to solve the problem of unstable bearing operation caused by the easy shake of the modified bearing roller in the bearing in the prior art becomes an important technical problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bearing roller, bearing and aerogenerator for solve the bearing roller of modification in prior art and easily produce in the bearing and rock the unstable defect of bearing operation that leads to.
The utility model provides a bearing roller, including the roller body who is revolution solid structure, roller body's generating line is including the straightway that is located the middle part and being located the segmental arc at straightway both ends, the plain line fit of straightway and raceway curved surface, the first end of segmental arc with straightway smooth connection, the segmental arc with distance between roller body's the axis is followed the direction of segmental arc first end to second end reduces gradually, the second end of segmental arc with roller body's terminal surface is tangent.
When the bearing roller is modified, the sectional modification is carried out, only the two ends of the bearing roller are modified, the middle part of the bearing roller is not modified, when the bearing roller is matched with the raceway for bearing, the stress concentration at the end part of the bearing roller is avoided, meanwhile, the bearing roller is ensured to be in line contact with the raceway, the shaking of the bearing roller in the raceway can be reduced, the bearing capacity of the bearing roller is improved, the stable operation of the bearing is facilitated, the service lives of the bearing roller and the bearing are prolonged, and meanwhile, the fatigue life of the bearing raceway can be prolonged. The problem of bearing operation unstability that the bearing roller of warp modification easily produces to rock in the bearing content and leads to in prior art is solved.
According to the utility model provides a pair of bearing roller, the segmental arc includes first section and second section, first section is located the second section with between the straightway, the both ends of first section respectively with the straightway with second section smooth connection.
According to the utility model provides a pair of bearing roller, first section and logarithmic curve, elliptic curve or parabola fit.
That is, the portion of the bearing roller corresponding to the first segment is subjected to logarithmic modification, the contact stress of the bearing roller subjected to logarithmic modification is uniformly distributed, and the problem of concentration of stress at the end portion does not occur even under heavy load. When the inner ring and the outer ring of the bearing are relatively inclined, the contact stress of the bearing roller subjected to logarithmic modification is the smallest compared with the stress variation when the bearing roller is not inclined, the problem of stress concentration at the end part still can not occur, and the bearing roller has strong adaptability.
According to the utility model provides a pair of bearing roller, the second section is convex, perhaps second section and elliptic curve fit.
And the arc-shaped curved surface corresponding to the second section on the bearing roller is used as a transition curved surface between the arc-shaped curved surface corresponding to the first section on the bearing roller and the end surface of the bearing roller. The second section is arranged to be arc-shaped, correspondingly, the arc-shaped curved surface corresponding to the second section on the bearing roller is formed into the radius of the end part of the bearing roller, so that the processing is convenient, and the cost is reduced.
According to the utility model provides a pair of bearing roller, the straightway is followed the axial length of roller body with the ratio of roller body's length is 15% -30%.
According to the utility model provides a pair of bearing roller, every first section is followed the axial length of roller body and the ratio of roller body's length is 32% -40%.
According to the utility model provides a pair of bearing roller, every the second section is followed the axial length of roller body with the ratio of the length of roller body is 3% -7%.
According to the utility model provides a pair of bearing roller, the roller body is cylindrical roller or tapered roller.
The utility model also provides a bearing, include as above-mentioned bearing roller.
The utility model also provides a wind-driven generator, including becoming the oar bearing, it includes as above-mentioned bearing roller to become the oar bearing.
The utility model provides an among the bearing roller, the middle part of roller body's generating line be can with the straightway of the plain line fit of raceway curved surface, the both ends of roller body's generating line are the segmental arc, and the second end of segmental arc is tangent with roller body's terminal surface. Namely, only the two ends of the bearing roller are modified, the middle part of the bearing roller is not modified, when the bearing roller is matched with the raceway for bearing, the stress concentration at the end part of the bearing roller is avoided, and meanwhile, the linear contact between the bearing roller and the raceway is ensured, so that the shaking of the bearing roller in the raceway can be reduced, and the stable operation of the bearing is facilitated. The problem of bearing operation unstability that the bearing roller of warp modification easily produces to rock in the bearing content and leads to in prior art is solved.
Further, the present invention provides a bearing having the above-described bearing roller, and therefore having various advantages as described above.
Further, the wind turbine according to the present invention includes the bearing roller as described above, and thus has various advantages as described above.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic profile view of an axial cross-section of a bearing roller provided by the present invention;
FIG. 2 is a schematic diagram of the setting position of the xoy plane when determining the modification amount;
fig. 3 is a schematic diagram of relative positions between the bearing roller and the inner ring and the outer ring provided by the present invention.
Reference numerals:
1: a roller body; 2: a straight line segment; 3: an arc-shaped section; 31: a first stage; 32: a second section; 4: an inner ring; 5: an outer ring; l: the overall length of the roller body.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The bearing roller of the present invention will be described below with reference to fig. 1 to 3.
As shown in fig. 1 to fig. 3, the embodiment of the present invention provides a bearing roller, including a roller body 1, the roller body 1 is a revolving structure and has a bus. The generating line of roller body 1 includes straightway 2 and segmental arc 3, and wherein straightway 2 is located the middle part, and segmental arc 3 is located the both ends of straightway 2.
The first end of segmental arc 3 and 2 smooth connections of straightway, the distance between the axis of segmental arc 3 and roller body 1 reduces along the direction of 3 first ends of segmental arc to second end gradually, and the second end of segmental arc 3 is tangent with roller body 1's terminal surface, and the both ends of bearing roller are the rounding off curve promptly, and smooth connection between the middle part of rounding off curve and bearing roller and the terminal surface can reduce the stress concentration effect of bearing roller tip.
The straight line segment 2 can be fitted with a plain line of a curved surface of the raceway, and the bearing roller is in line contact with the raceway. When the bearing roller is modified, the sectional modification is carried out, only the two ends of the bearing roller are modified, the middle part of the bearing roller is not modified, when the bearing roller is matched with the raceway for bearing, the stress concentration at the end part of the bearing roller is avoided, meanwhile, the bearing roller is ensured to be in line contact with the raceway, the shaking of the bearing roller in the raceway can be reduced, the bearing capacity of the bearing roller is improved, the stable operation of the bearing is facilitated, the service lives of the bearing roller and the bearing are prolonged, and meanwhile, the fatigue life of the bearing raceway can be prolonged. The problem of bearing operation unstability that the bearing roller of warp modification easily produces to rock in the bearing content and leads to in prior art is solved.
The embodiment of the utility model provides an in, set up 3 segmentation of above-mentioned segmental arc, specifically include first section 31 and second section 32, first section 31 is located between second section 32 and straightway 2, the both ends of first section 31 respectively with straightway 2 and second section 32 smooth connection.
In this embodiment, the first segment 31 is fitted to a logarithmic curve, an elliptic curve or a parabola. The logarithmic curve, the elliptic curve and the parabola all have sections with smaller curvature, and the degree of curvature is smaller and is relatively gentle. Correspondingly, the change of the modification quantity of the two ends of the bearing roller is small, the diameter shock of the bearing roller can not occur, and the stability and the bearing capacity of the bearing roller are ensured.
The second segment 32 is rounded or the second segment 32 is fitted to an elliptical curve.
In a preferred embodiment, the first segment 31 is fitted with a logarithmic curve, that is, a part of the bearing roller corresponding to the first segment 31 is subjected to logarithmic modification, so that a side surface of the bearing roller corresponding to the first segment 31 is a logarithmic modification arc surface. The contact stress of the bearing roller after logarithmic modification is uniformly distributed, and the problem of end stress concentration can not occur even under heavy load. When the inner ring and the outer ring of the bearing are relatively inclined, the contact stress of the bearing roller subjected to logarithmic modification is the smallest compared with the stress variation when the bearing roller is not inclined, the problem of stress concentration at the end part still can not occur, and the bearing roller has strong adaptability.
It should be noted that, when the bearing roller is modified, the modification amount directly affects the working performance of the bearing, and in order to obtain a high-performance bearing, the modification amount must be optimally selected according to specific working conditions.
Specifically, referring to fig. 2, an axial cross section of the bearing roller may be taken as an xoy plane, where an axis of the bearing roller is taken as an x-axis, an origin of the x-axis is located on a middle cross section of the bearing roller, and accordingly, a straight line passing through the origin of the x-axis and perpendicular to the x-axis on the axial cross section is taken as a y-axis.
The middle point of the straight line section 2 is positioned on the y axis, and the part of the axial roller corresponding to the straight line section 2 is not modified, so that the vertical coordinate corresponding to the straight line section 2 is the radius of the bearing roller.
The modification amount for the portion of the bearing roller corresponding to the first segment 31 is calculated according to the following formula:
wherein, L is the total length of the roller body 1, x is the abscissa of the modification position point, that is, the distance between the modification position point and the middle section, α is a proportionality coefficient, and the specific numerical value of α needs to be determined according to the specific working condition of the bearing roller and the requirement on the bearing capacity of the bearing roller.
After the shape modification amount of each shape modification position point is determined according to the formula, the radius of each shape modification position point of the bearing roller is subtracted by the calculated shape modification amount, and the obtained shape modification amount is the corresponding longitudinal coordinate of the corresponding shape modification position point after shape modification and is also the radius value of the corresponding shape modification position point after shape modification.
The arc-shaped curved surface corresponding to the second segment 32 on the bearing roller is used as a transition curved surface between the arc-shaped curved surface corresponding to the first segment 31 on the bearing roller and the end surface of the bearing roller, in some specific embodiments, the second segment 32 is arranged to be arc-shaped, and correspondingly, the arc-shaped curved surface corresponding to the second segment 32 on the bearing roller is formed into a radius of the end part of the bearing roller, so that the processing is convenient, and the cost is reduced.
In the embodiment of the utility model provides an in, the ratio scope of straightway 2 along 1 axial length of roller body and 1 length of roller body is 15% -30%, specifically can select to be 23%. And a sufficient contact amount between the bearing roller after the modification and the raceway is ensured, and the running stability of the bearing is ensured.
In this embodiment, the ratio of the length of each first segment 31 in the axial direction of the roller body 1 to the length of the roller body 1 is in the range of 32% to 40%, and specifically can be selected to be 36%.
The ratio of the length of each second segment along the axial direction of the roller body 1 to the length of the roller body 1 is in a range of 3% -7%, and specifically can be selected to be 5%.
In an alternative embodiment, when the second segment 32 is in the shape of a circular arc, the length of the second segment 32 along the axial direction of the roller body 1 is generally set to 1-5 mm, and specifically may be set to 2 mm.
In the embodiment of the present invention, the roller body 1 can be a cylindrical roller, and can also be a tapered roller.
On the other hand, the embodiment of the utility model provides a still provide a bearing, including the bearing roller that any above-mentioned embodiment provided, the bearing roller sets up between bearing inner race 4 and outer lane 5. The bearing roller in the above embodiment has a small amount of shake between the inner ring 4 and the outer ring 5 of the bearing, and the end stress concentration effect is small, so that the bearing in the embodiment has the advantages of smooth operation, high bearing capacity and long service life. The embodiment of the utility model provides an in the beneficial effect of bearing derive the process similar with the derivation process of the beneficial effect of above-mentioned bearing roller roughly, so here is no longer repeated.
In another aspect, an embodiment of the present invention further provides a wind turbine, including a pitch bearing. The pitch bearing comprises the bearing roller provided by any one of the embodiments. The bearing roller in the embodiment has small shaking amount between the inner ring 4 and the outer ring 5 of the bearing, and the stress concentration effect of the end part is small, so that the variable pitch bearing has the advantages of stable operation, high bearing capacity and long service life, and the operation stability of the wind driven generator is improved. The embodiment of the utility model provides an in aerogenerator's beneficial effect derive the process similar with the derivation process of above-mentioned bearing roller's beneficial effect roughly, the unnecessary repeated description here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a bearing roller, its characterized in that, is including the roller body that is revolution solid structure, the generating line of roller body is including the straightway that is located the middle part and being located the segmental arc at straightway both ends, the straightway fits with the plain line of raceway curved surface, the first end of segmental arc with straightway smooth connection, the segmental arc with distance between the axis of roller body is followed the direction of segmental arc first end to second end reduces gradually, the second end of segmental arc with the terminal surface of roller body is tangent.
2. The bearing roller of claim 1 wherein the arcuate segment comprises a first segment and a second segment, the first segment being positioned between the second segment and the straight segment, both ends of the first segment being smoothly connected with the straight segment and the second segment, respectively.
3. The bearing roller of claim 2 wherein the first segment is fitted to a logarithmic curve, an elliptical curve or a parabola.
4. The bearing roller of claim 2 wherein the second segment is circular or fits an elliptical curve.
5. The bearing roller of claim 1 wherein the ratio of the length of the straight segment in the axial direction of the roller body to the length of the roller body is 15% to 30%.
6. The bearing roller of claim 2, wherein a ratio of a length of each of the first segments in an axial direction of the roller body to a length of the roller body is 32-40%.
7. The bearing roller of claim 2, wherein a ratio of a length of each of the second segments in an axial direction of the roller body to a length of the roller body is 3-7%.
8. The bearing roller of claim 1 wherein the roller body is a cylindrical roller or a tapered roller.
9. A bearing comprising a bearing roller according to any one of claims 1 to 8.
10. A wind power generator comprising a pitch bearing comprising a bearing roller according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122984476.1U CN216430286U (en) | 2021-11-30 | 2021-11-30 | Bearing roller, bearing and wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122984476.1U CN216430286U (en) | 2021-11-30 | 2021-11-30 | Bearing roller, bearing and wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216430286U true CN216430286U (en) | 2022-05-03 |
Family
ID=81341755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122984476.1U Active CN216430286U (en) | 2021-11-30 | 2021-11-30 | Bearing roller, bearing and wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216430286U (en) |
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2021
- 2021-11-30 CN CN202122984476.1U patent/CN216430286U/en active Active
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