• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Bearing with stiffening compensation of overstresses of those using a stiffener to compensate for the stresses that occur in certain arc-shaped areas of critical tension of a raceway ring and those used in wind or similar installations in which the bearing (3) in the arccircumferential zone of critical tension (6) has attached a non-metallic stiffener of multiple structure (10) constituted by a synthetic base structure (11) and tensile-resistant inclusions (12) oriented at least in the direction of the main overburden to be compensated. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2695500A1
    申请号:ES201730868
    申请日:2017-06-30
    公开日:2019-01-08
    发明作者:Santa Cruz Aitor Zurutuza；Agirrebengoa Ioseba Lekuona；Iriarte Mikel Asensio；Irizar Mireia Olave
    申请人:Laulagun Bearings SL；
    IPC主号:
    专利说明:

    [0001]
    [0002] BEARING WITH OVERFLOW COMPENSATION RIGIDIZER
    [0003]
    [0004]
    [0005] This invention concerns a bearing with stress stiffening compensation of employees in wind installations or similar.
    [0006]
    [0007]
    [0008]
    [0009] Currently, there are large size bearings used in different sectors in the market, the wind sector being one in which the use of large bearings is common.
    [0010]
    [0011] One of the places of a wind turbine where these bearings are used is in the blades of the wind turbine. During the operation of the wind turbine in the bearings of the blades of the wind turbine, very complex forces are produced, such as the force due to the wind, the force due to the weight of the blade and the centrifugal force due to the rotation of the wind turbine blade. These stresses are accentuated in the contour of the housings of the raceways. The most damaging stresses in the bearing occur in the area of the direction circumferential to the axis of rotation of the bearing (called direction "hoop") and within that circumferential direction there is an especially critical arccircumferential zone (called zone "hoop") where they produce the greatest forces that must be reduced or compensated using stiffeners attached to the outer (and / or internal) rings of the rolling bearing because oversizing the entire bearing would be a less desirable option in weight, cost and complexity.
    [0012]
    [0013] The use of metallic arc-shaped stiffeners is known as well as their connection by screwing and the use of different cross sections that aim to improve the compensation of overstresses.
    [0014]
    [0015] In this sense, for example, the Spanish Patent ES 200602873 of Gamesa Innovation & Technology, S.L. that reinforces a bearing of a wind turbine blade that contains an arccircifferential stiffener attached to a part of the outer race in which the connection is made by bolted connections.
    [0016]
    [0017] Also known is European Patent EP 08104136 from Siemens Aktiengesellschaft in which advantageous geometrical shapes of the outer and / or inner ring section of an arccircumferential stiffener are shown.
    [0018]
    [0019] In the hitherto known metal stiffeners which are screwed together, there is a significant increase in weight of the overall structure of the wind turbine which is undesirable.
    [0020] Likewise, the bolted joints need more space in the section of the raceway for the screw holes and they need to recalculate their section increasing their surface, which is why stiffeners of larger size and weight are required, which accentuates the detrimental Its use.
    [0021]
    [0022] Thus, for a bearing that has to withstand extreme loads of fifteen thousand kilonewtons per meter (15,000 kNm) requires a bearing diameter of two thousand seven hundred millimeters (2700 mm) and an approximate weight of bearing two thousand five hundred kilograms (2500 kg). The necessary steel stiffener is approximately 10% of the Bearing weight, that is, two hundred and fifty kilograms (250 kg) and spans between one hundred and forty and one hundred and eighty degrees (140 ° -180 °) of the bearing sector.
    [0023]
    [0024] These solutions are difficult to repair or replace in the field because they require unscrewing in very difficult positions and even unscrewing the bearing itself.
    [0025]
    [0026]
    [0027]
    [0028] Faced with this state of the art, the essential object of this invention is a bearing with reinforcing stiffener of overforce that in the arccircumferential zone of critical tension has attached a non-metallic stiffener of multiple structure constituted by a synthetic base structure and inclusions resistant to traction oriented at least in the direction of the main overstrain to compensate.
    [0029]
    [0030] Thanks to this configuration, as it is a non-metallic stiffener of multiple structure, a bearing with a stiffener of resistance not less than that of the metal stiffener is achieved, but with a considerable reduction in weight. Therefore, the overall weight of the wind turbine structure is reduced. In addition, its colocation in the simplest bearing.
    [0031]
    [0032] Another feature of the invention is that the tensile-resistant inclusions are preferably formed by resistant filament elements oriented in the direction of the main overlap to be compensated.
    [0033]
    [0034] The advantages of this configuration is that it achieves a greater resistance to the traction just in the precise place of the cross section and allows, with ease, to perform a specific stiffener with its own resistance for the number, material and section of the incorporated filar elements ; what facilitates its manufacture and even allows a replacement of the bearing is not necessary, but can even be supplemented and easily repaired in the field.
    [0035]
    [0036] Another feature of the invention is that the connection of the non-metallic stiffener of multiple structure to the arccircumferential zone of critical tension will be made with adhesive bond, reinforced or not with bolted metal joints.
    [0037]
    [0038] Thanks to this configuration, a type of union can be made, another, or a complement of the two depending on the characteristics of the type of installation and its location (dry, humid, saline environment ...).
    [0039]
    [0040] Another characteristic of the invention is that the non-metallic stiffener of multiple structure has a configuration in amplitude of the arc, section, material and nature of the inclusions resistant to traction suitable to the concrete reinforcement of each bearing.
    [0041]
    [0042] The advantages of this configuration is that a greater versatility is obtained, being able to adapt the non-metallic stiffener of multiple structure to different situations depending on the characteristics of the installation. It is also possible to perform bearing stiffening and / or repairs in the field, that is, when any type of defect or crack in the bearing is identified, it is possible to decelerate or even stop the advance of the crack by means of the multiple structure non-metallic stiffener. In addition, the multi-structure non-metallic stiffener can be applied during the manufacture of the bearing or in situ, that is, when the bearing is in the assembly facilities, before or after its assembly in the joint hub of the wind turbine blades , being able to be easily replaced in case of finding any type of defect.
    [0043] Another feature of the invention is that it is envisaged that the traction-resistant inclusions may adopt a single-wire form and / or a braided cord, a mesh or tissue shape with complementary resistance in the transverse direction.
    [0044]
    [0045] Thanks to this configuration, a greater resistance of the bearing is obtained, being able the bearing with its non-metallic stiffener of multiple structure to be able to support greater efforts.
    [0046]
    [0047] Another characteristic of this invention is that the adoption of cross sections suitable for possible stresses is foreseen.
    [0048]
    [0049] The advantages of this configuration is that depending on the type of wind installation and the stresses to which the bearing is subjected, a stiffener can be used with one type of section or another.
    [0050]
    [0051] Another feature of the invention is that within the same cross section the variable distribution of the tensile resistant inclusions is foreseen.
    [0052]
    [0053] Thanks to this configuration, you get a greater resistance and rigidity of the bearing, and therefore a greater durability, taking more advantage of the possible available space.
    [0054]
    [0055] Another feature of the invention is that the inclusion of the non-metallic stiffener of multiple structure on the periphery of the outer rolling ring and / or inner rolling ring of the bearing is provided.
    [0056]
    [0057] The advantages of this configuration is that depending on the efforts generated in the installation, it is possible to place the non-metallic stiffener of multiple structure in one area or another.
    [0058]
    [0059] According to the invention, it is provided that the angular amplitude of the non-metallic stiffener of multiple structure can reach up to the complete crown (360 °) if desired.
    [0060]
    [0061] Thanks to the configurations of the invention, it is possible to reinforce the bearing in function of the characteristic efforts of each type of installation.
    [0062]
    [0063] Another feature of the invention is that it is provided that the tensile-resistant inclusions are wholly or partly metallic, maintaining the non-metallic character of the multiple-structure non-metallic stiffener.
    [0064]
    [0065] The advantages of this configuration are that they make the non-metallic rigidizer of multiple structure more versatile, being able to adapt to each type of installation depending on the required requirements.
    [0066]
    [0067]
    [0068]
    [0069] In order to better understand the nature of the invention, the attached drawings show a form of industrial realization that has a merely illustrative and non-limiting example character.
    [0070]
    [0071] Figure 1 shows in the left part a view of the bearing (3) in the joint bushing of the wind turbine blades (2b) with the non-metallic stiffener of multiple structure (10), represented in black, attached to the outer race of the tread (3b) and where the efforts to which it is subjected due to the operation of the wind turbine (2) are observed.
    [0072] In the lower right part an enlarged detail has been represented, for a better understanding, of the cross section (14) of the bearing (3) in which the multiple structure non-metallic stiffener (10) attached to the outer raceway ring is observed (3b)
    [0073]
    [0074] For a better visualization of the multi-structure non-metallic stiffener (10), in the upper right part, the detail has been further enlarged and the composition of the multiple-structure non-metallic stiffener (10), constituted by the synthetic base structure ( 11) and the traction-resistant inclusions (12) and the reinforcing joint (7) to the outer rolling ring (3b), represented in a thicker line.
    [0075]
    [0076] Figure 2 aims to explain the forces acting on wind turbines, which represents on the left side an isometric view of the structure of the wind turbine (2) and the forces and torques to which it is subjected during its operation.
    [0077]
    [0078] In the right part of figure 2 there is an enlarged plan detail of the bearing (3) in the union hub (2b) of the wind turbine blades (2) with the usual stiffener (1) attached to the bearing (3) and where it is also observed the efforts to which it is subject generated by the operation of the wind turbine (2).
    [0079]
    [0080] Figures 3a, 3b, 3c and 3d represent different possible embodiments of the cross section (14) of the multiple structure non-metallic stiffener (10).
    [0081]
    [0082] In these figures are indicated the following references:
    [0083]
    [0084] 1. - usual stiffener
    [0085] 2. - Wind turbine
    [0086] 2a.- Wind turbine blade (2)
    [0087] 2b.- Union joint of the wind turbine blades (2)
    [0088] 2c.- Wind turbine gondola (2)
    [0089] 2d.- Wind turbine tower (2)
    [0090] 3. - Bearing
    [0091] 3a.- Rolling element
    [0092] 3b.- External rolling ring
    [0093] 3c.- Internal rolling ring
    [0094] 3d.- Joining hole of the external rolling ring (3b)
    [0095] 3e.- Joining hole of the internal rolling ring (3c)
    [0096] 4. - Forces generated in the wind turbine (2)
    [0097] 4a.- Force due to the wind
    [0098] 4b.- Force due to the weight of the blade
    [0099] 4c.- Centrifugal force due to the rotation of the blade
    [0100] 5. - Pairs generated in the wind turbine (2)
    [0101] 5a.- Torque generated by the force due to the wind (4a)
    [0102] 5b.- Torque generated by the force due to the weight of the blade (4b)
    [0103] 5c.- Torque generated by the centrifugal force due to the rotation of the blade (4c)
    [0104] 5d.- Torque generated by the force due to the wind (4a) and the force due to the weight of the blade (4b)
    [0105] 6. - Arccircumferential zone of critical tension
    [0106] 10. - Non-metallic stiffener of multiple structure
    [0107] 11. - Synthetic base structure
    [0108] 12. - Traction resistant inclusions
    [0109] 13. - Adhesive union of the multiple structure non-metallic stiffener (10) to the outer race (3b)
    [0110] 14. - Cross section
    [0111]
    [0112] With reference to the drawings and references listed above, a preferred embodiment of the object of the invention is illustrated in the accompanying pianos, which concerns a bearing with stiffening compensation of overstresses of those who use a stiffener to compensate for the stresses that are applied to them. In certain areas they produce arcs of critical tension in a rolling ring and those used in wind or similar installations in which the bearing (3) in the arccircumferential zone of critical tension (6) has a multiple structure non-metallic stiffener ( 10) constituted by a synthetic base structure (11) and traction resistant inclusions (12) oriented at least in the direction of the main overburden to be compensated.
    [0113]
    [0114] In figure 1 we can see in the left part the bearing (3) in the union of union (2b) of the blades of the wind turbine (2). Due to the operation of the wind turbine (2) the bearing (3) is subjected to different types of forces and pairs. In this way, the bearing (3) subjected to the force due to the wind (4a) and the force due to the weight of the blade (4b) are shown, which create the torque generated by the force due to the wind (4a) and the force due to the weight of the blade (4b).
    [0115]
    [0116] It is also observed the arccircumferential zone of critical tension (6) of the bearing (3) in which the greater efforts take place, corresponding with the circumferential direction to the axis of rotation of the bearing (3). This arccircumferential zone of critical tension (6) is reinforced by the non-metallic stiffener of multiple structure (10).
    [0117]
    [0118] The new concept of carrying out the multiple structure non-metallic stiffener (10) allows each of the components of its multiple structure to have a different structural function and the synthetic base structure (11) is favorable for fixing the multiple structure non-metallic stiffener (10) to the outer ring of rolling (3b) and / or inner ring of rolling (3c) and also fix the inclusions resistant to traction (12), which are properly those that most intervene in the compensation of the overstresses and, therefore, , they can be specified in material, section, distribution and even position within the section of the synthetic base structure (11); all this to meet the demands of a specifically programmed execution.
    [0119]
    [0120] The lower section shows the cross section (14) of the bearing (3), in which a detailed view of the multi-structure non-metallic stiffener (10), consisting of a synthetic base structure ( 11) and traction resistant inclusions (12). Thanks to this configuration, being materials lighter than metal, a lower weight of the bearing (3) and, consequently, a lower weight of the overall structure of the wind turbine (2) is obtained.
    [0121]
    [0122] It is also observed that the traction resistant inclusions (12) are preferably formed by resistant thread elements oriented in the direction of the main overburden to be compensated. Thanks to this characteristic, a greater absorption of the forces generated in the bearing (3) and, therefore, greater resistance is allowed.
    [0123]
    [0124] In the enlarged detail of the multiple structure non-metallic stiffener (10), the reinforcement connection (7) to the external rolling ring (3b) of the multiple structure non-metallic stiffener (10) is represented to the arccircumferential zone of critical tension (10). 6) to be made with adhesive union (13), reinforced or not with screwed metal joints. In a preferred embodiment, it is provided that the reinforcement connection (7) to the outer rolling ring (3b) is made by adhesive connection (13). The advantages of this configuration is that when it comes to adhesive joints (13) they need a smaller space than if mechanical joints were used and, consequently, the weight of the structure of the wind turbine (2) is reduced. Also, there is no need to unscrew the outer race (3b) and / or the inner race (3c) of the bearing (3).
    [0125]
    [0126] It is also observed in figure 1, that the non-metallic stiffener of multiple structure (10) has a configuration in amplitude of the arc, section, material and nature of the traction-resistant inclusions (12) suitable to the concrete stress of each bearing (3) ).
    [0127]
    [0128] It is envisaged that the tensile resistant inclusions (12) can adopt a single-wire form and / or braided cord, a mesh or fabric shape with complementary resistance in the transverse direction, the bearing (3) being able to withstand greater stresses in this way.
    [0129]
    [0130] Other possible embodiments of the invention are shown in Figures 3a, 3b, 3c and 3d. In this way, the adoption of cross sections (14) suitable for possible stresses is foreseen. Therefore, it is possible to use a type of cross section (14) or another depending on the strengths to be supported and the type of wind installation.
    [0131]
    [0132] At the same time, within the same cross section (14) the variable distribution of traction-resistant inclusions (12) is foreseen. Thus, it is possible to increase the stiffness of the non-metallic stiffener of multiple structure (3) in a specific area and, therefore, it is possible to withstand greater stresses depending on the characteristics of the wind installations.
    [0133]
    [0134] Another feature of the invention is that the inclusion of the non-metallic stiffener of multiple structure (10) is provided on the periphery of the outer ring (3b) and / or inner ring (3c) of the bearing (3). In this way, it is possible to place the non-metallic stiffener of multiple structure (10) in one area or another depending on the needs required.
    [0135]
    [0136] Another feature of the invention is that it is provided that the angular amplitude of the multiple-structure non-metal stiffener (10) can reach the entire crown (360 °) if desired. In this way, it is possible to reinforce the bearing (3) according to the characteristics of the type of installation.
    [0137]
    [0138] Finally, another characteristic of the invention is that it is provided that the tensile-resistant inclusions (12) are wholly or partially metallic maintaining the non-metallic character of the non-metallic stiffener of multiple structure (10). In this way, a non-metallic stiffener of multiple structure (10) is obtained more versatile, being able to adapt to each type of installation according to the required needs.
    [0139]
    [0140] Thus, according to our invention, the multi-structure non-metallic stiffener (10) can be made with a synthetic base structure (11) of high-modulus carbon fiber reinforcing material. In this way, a stiffness equal to that provided by the usual stiffener (1) is obtained by adding an approximate percentage of 20% more area of material to compensate the difference of the elastic modulus of the steel. Even so, having a much lower density, the final sum of the added weight can be four times smaller than the usual stiffener (1). In this way, in the case of a bearing (3) of two thousand five hundred kilograms of weight (2500 kg), instead of adding a usual stiffener (1) of two hundred and fifty kilograms (250 kg), a stiffener can be obtained not metal of multiple structure (10) of sixty-five kilograms (65 kg).
    [0141]
    [0142] With regard to the adhesive bond (13) of the non-metallic stiffener of multiple structure (10) to the outer ring of rolling (3b), it can be made by rigid adhesives, for example, epoxies or methacrylates, which can reach high strengths similar to screwed joints and with good durability.
    [0143] This invention is applicable to any type of bearing (3) in which the rolling element (3a) can be balls and / or rollers or any of those currently used.
    [0144]
    [0145] The essentiality of this invention does not alter variations in materials, shape, size and disposition of the component elements, described in a non-limiting manner, this being sufficient to proceed to its reproduction by an expert.
    权利要求:
    Claims (10)
    [1]
    1. Bearing with stiffening compensation of overstresses of those using a stiffener to compensate for the stresses that occur in certain arccircular areas of critical tension of a raceway and those used in wind installations or similar characterized by the bearing (3) in the arccircumferential zone of critical tension (6) it has attached a non-metallic stiffener of multiple structure (10) constituted by a synthetic base structure (11) and traction-resistant inclusions (12) oriented at least in the direction of the main overburden to be compensated .
    [2]
    2. Bearing with stiffening compensation stiffener according to claim 1a, characterized in that the tensile-resistant inclusions (12) are preferably formed by resistant thread elements oriented in the direction of the main overhang to be compensated.
    [3]
    3. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that the union of the non-metallic stiffener of multiple structure (10) to the arccircumferential zone of critical tension (6) will be made with adhesive bond (13), reinforced or not with screwed metal joints.
    [4]
    4. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that the non-metallic stiffener of multiple structure (10) has a configuration in amplitude of the arc, section, material and nature of the tensile-resistant inclusions (12) suitable for Concrete stress of each bearing (3).
    [5]
    5. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that it is provided that the tensile-resistant inclusions (12) can adopt a single-wire form and / or braided cord, form a mesh or fabric with complementary resistance in the transverse direction.
    [6]
    6. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that the adoption of cross sections (14) suitable for possible stresses is provided.
    [7]
    7. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that the variable distribution of the tensile resistant inclusions (12) is provided within the same cross section (14).
    [8]
    8. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that the inclusion of the non-metallic stiffener of multiple structure (10) is provided on the periphery of the external rolling ring (3b) and / or inner raceway ring (3c) ) of the bearing (3).
    [9]
    9. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that it is provided that the angular amplitude of the non-metallic stiffener of multiple structure (10) can reach up to the complete crown (360 °) if desired.
    [10]
    10. Bearing with stiffening compensation stiffener according to the preceding claims, characterized in that it is provided that the traction-resistant inclusions (12) are wholly or partially metal maintaining the non-metallic character of the non-metallic stiffener of multiple structure (10).
    类似技术:
    公开号 | 公开日 | 专利标题
    ES2423033T5|2017-02-24|Step bearing for wind turbine rotor blades
    ES2301395B1|2009-05-01|REINFORCED BEARING OF A BLADDER OF A WINDER.
    ES2229508T3|2005-04-16|CONNECTION OF THE ROTOR SHOVEL OF A WIND ENERGY INSTALLATION TO A ROTOR CUBE.
    ES2605679T3|2017-03-15|Hub for the rotor of a wind power turbine
    ES2735227T3|2019-12-17|Shovel insert
    US8777573B2|2014-07-15|Sectional wind turbine blade
    ES2670329T3|2018-05-30|Rotor blade connection
    ES2760526T3|2020-05-14|Aerodynamic Wrap Extension Element Part for a Wind Turbine Blade
    ES2423430T3|2013-09-20|Equipment to be mounted on the hub of a wind turbine and procedure to perform the maintenance of a wind turbine using such equipment
    ES2296531B1|2009-03-01|TOWER FOR AEROGENERATORS ASSEMBLED WITH PREFABRICATED ELEMENTS.
    KR100736154B1|2007-07-06|Rotor blade connection
    ES2655943T3|2018-02-22|Shovel bearing with support structure that has non-uniform stiffness and manufacturing method
    ES2342638A1|2010-07-09|A wind turbine multi-panel blade
    ES2658947T3|2018-03-13|Wind turbine blade with clamping means
    ES2371403A1|2012-01-02|Blade root extender for a wind turbine
    JP5597697B2|2014-10-01|Windmill
    ES2715403T3|2019-06-04|Wind turbine blade
    ES2353325A1|2011-03-01|Stiffening the blade root of a wind turbine
    ES2367933A1|2011-11-11|Blade root extender
    ES2695500B2|2019-09-10|BEARING WITH OVERFLOW COMPENSATION RIGIDIZER
    ES2607960T3|2017-04-04|Disposition of components of a wind turbine
    ES2437199A2|2014-01-09|Method for the "in situ" repair of crowns. |
    ES2274263T3|2007-05-16|SPIRAL OF A TURBOMACHINE.
    ES2874048T3|2021-11-04|Wind turbine and wind turbine pitch bearing
    ES2875123T3|2021-11-08|Rotating needle for wind turbine distributor
    同族专利:
    公开号 | 公开日
    EP3421829A1|2019-01-02|
    ES2695500B2|2019-09-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2532882A1|2011-06-10|2012-12-12|General Electric Company|System and methods for assembling a wind turbine with a pitch assembly|
    US20130177419A1|2011-11-22|2013-07-11|Mitsubishi Heavy Industries, Ltd.|Wind turbine|
    WO2013107452A1|2012-01-20|2013-07-25|Vestas Wind Systems A/S|Blade bearing with support structure having non-uniform stiffness and method manufacture|
    US20140377069A1|2013-06-20|2014-12-25|General Electric Company|Pitch bearing assembly with stiffener|
    US20150003986A1|2013-06-27|2015-01-01|General Electric Company|Pitch bearing assembly with stiffener|
    DE102009056349A1|2009-11-30|2011-06-01|Schaeffler Technologies Gmbh & Co. Kg|roller bearing|
    WO2012160026A1|2011-05-20|2012-11-29|Aktiebolaget Skf|Bearing with fiber composite rings|
    US20130202234A1|2012-02-06|2013-08-08|Mitsubishi Heavy Industries, Ltd.|Slewing bearing structure|
    法律状态:
    2019-01-08| BA2A| Patent application published|Ref document number: 2695500 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190108 |
    2019-09-10| FG2A| Definitive protection|Ref document number: 2695500 Country of ref document: ES Kind code of ref document: B2 Effective date: 20190910 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201730868A|ES2695500B2|2017-06-30|2017-06-30|BEARING WITH OVERFLOW COMPENSATION RIGIDIZER|ES201730868A| ES2695500B2|2017-06-30|2017-06-30|BEARING WITH OVERFLOW COMPENSATION RIGIDIZER|
    EP18172021.0A| EP3421829A1|2017-06-30|2018-05-14|Bearing having a stiffener of overstress compensation|
    [返回顶部]