A bearing seat flange for a wind turbine generator and a wind turbine generator

Abstract

The utility model discloses a bearing seat flange and wind turbine generator for wind power generator unit relates to wind power generation equipment technical field, including flange connecting surface, the first sector, second sector, third sector and fourth sector are set up with the circumference to the flange connecting surface, the first sector and third sector about flange center of circle symmetry setting, second sector and fourth sector about flange center of circle symmetry setting, along bolt distribution circle even distribution in the bolt hole of flange connecting surface, along the small peg distribution circle even distribution in the small peg of first sector and third sector, along the big peg distribution circle even distribution in the big peg of second sector and fourth sector, wherein, the diameter of big peg is greater than the diameter of small peg. The above -mentioned bearing seat flange for wind power generator unit can effectively deal with the uneven stress problem of flange connecting surface under complex working condition, improve the reliability and stability of connection, reduce material cost and maintenance cost simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a bearing seat flange for wind turbine generator sets and a wind turbine generator set. Background Technology

[0002] In the field of wind power generation, wind turbines, as core equipment, undertake the important task of converting wind energy into electrical energy. Due to their long-term operation in harsh outdoor environments, wind turbines must withstand multiple influences, including complex and variable wind loads, mechanical vibrations, and temperature changes.

[0003] In wind turbine generators, the integrated gearbox gear ring and main shaft bearing flange are key components of the transmission system, and the stability of their connection is crucial to ensuring the smooth operation of the entire transmission system. However, in traditional connection methods, uniformly sized and evenly distributed pins are typically used to fix the connection surface between the gear ring and the main shaft bearing flange, but this has revealed many problems in actual operation.

[0004] Due to the varying components of wind force acting on the wind turbine in different directions, and the inherent dynamic characteristics of the transmission system, the stress on the flange connection surface is extremely uneven. Especially during wind turbine operation, the left and right sides of the flange connection surface bear significant shear forces caused by wind shear and yaw torque. Consequently, the pins in this area are under high stress for extended periods, making them prone to fatigue cracks or even shearing, severely impacting the reliability of the connection.

[0005] Meanwhile, on the upper and lower sides of the flange connection surface, where the force is relatively small, the traditional uniformly distributed pin design causes the pins in these areas to bear a large design load, resulting in material waste.

[0006] Therefore, how to provide a bearing housing flange for wind turbine generator sets that ensures sufficient connection strength and stability in areas with high stress, while reducing unnecessary material waste in areas with low stress, is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0007] The purpose of this utility model is to provide a bearing housing flange for wind turbine generator sets and a wind turbine generator set, which solves the technical problems that the pins in areas with large stress are easily sheared off and the material cost is high in areas with relatively small stress.

[0008] To achieve the above objectives, this utility model provides a bearing housing flange for wind turbine generator sets, comprising:

[0009] The flange connection surface is provided with a first sector, a second sector, a third sector and a fourth sector along the circumference. The first sector and the third sector are symmetrically arranged about the center of the flange, and the second sector and the fourth sector are symmetrically arranged about the center of the flange.

[0010] Bolt holes are evenly distributed along the bolt distribution circle on the flange connection surface;

[0011] Small pins are evenly distributed along the distribution circle of small pins in the first sector and the third sector;

[0012] Large pins are evenly distributed along the distribution circle of large pins in the second sector and the fourth sector;

[0013] The diameter of the large pin is greater than the diameter of the small pin.

[0014] Preferably, the fan angles of the first and third sub-sectors are both obtuse angles, and the fan angles of the second and fourth sub-sectors are both acute angles.

[0015] Preferably, the large pins are distributed at equal fan angle densities in the second and fourth sub-sectors, and the included angle between the centers of adjacent large pins is 8°.

[0016] Preferably, the small pins are distributed at equal sector angle densities in the first sector and the third sector, and the included angle between the centers of adjacent small pins is 6°.

[0017] Preferably, the diameter of the large pin is 20%-50% larger than the diameter of the small pin.

[0018] Preferably, the diameter of the large pin distribution circle is larger than the diameter of the bolt distribution circle.

[0019] Preferably, the diameter of the small pin distribution circle is larger than the diameter of the large pin distribution circle.

[0020] Preferably, both the large pin and the small pin have a zinc-plated layer on their surfaces.

[0021] Preferably, both the large pin and the small pin have chamfered ends.

[0022] A wind turbine generator set includes the aforementioned bearing housing flange for a wind turbine generator set.

[0023] Compared to the aforementioned background technology, this utility model provides a bearing housing flange for wind turbine generator sets. Multiple small pins are evenly distributed along a small pin distribution circle, located in the first and third sub-sectors. Simultaneously, multiple large pins are evenly distributed along a large pin distribution circle, located in the second and fourth sub-sectors. The diameter of the large pins is larger than that of the small pins. During wind turbine generator operation, the second and fourth sub-sectors experience greater shear forces due to wind shear and yaw torque, thus requiring large-diameter pins to enhance connection strength. Conversely, the first and third sub-sectors experience relatively less stress, allowing for the use of small-diameter pins. This approach ensures connection reliability while effectively reducing material costs.

[0024] Through the aforementioned differentiated pin layout, the bearing housing flange of this application can effectively address the problem of uneven stress on the flange connection surface under complex working conditions, improve the reliability and stability of the connection, and reduce material and maintenance costs, thus providing a strong guarantee for the long-term stable operation of wind turbine generator sets. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of a bearing housing flange structure for a wind turbine generator set provided in this embodiment of the present invention;

[0027] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0028] in:

[0029] 1-Flange connection surface, 2-First sector, 3-Second sector, 4-Third sector, 5-Fourth sector, 6-Bolt distribution circle, 7-Bolt hole, 8-Small pin distribution circle, 9-Small pin, 10-Large pin distribution circle, 11-Large pin. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See Figures 1-2 This application provides a bearing housing flange for a wind turbine generator set, comprising a flange connection surface 1, wherein the flange connection surface 1 is circumferentially provided with a first sector 2, a second sector 3, a third sector 4, and a fourth sector 5, the first sector 2 and the third sector 4 being symmetrically arranged about the flange center, and the second sector 3 and the fourth sector 5 being symmetrically arranged about the flange center; bolt holes 7 are evenly distributed along bolt distribution circle 6 on the flange connection surface 1; small pins 9 are evenly distributed along small pin distribution circle 8 on the first sector 2 and the third sector 4; and large pins 11 are evenly distributed along large pin distribution circle 10 on the second sector 3 and the fourth sector 5; wherein the diameter of the large pins 11 is larger than the diameter of the small pins 9.

[0033] In other words, the bearing housing flange includes a flange connection surface 1, which is the area where the flange connects to the gearbox gear ring. In order to optimize the stress distribution of the flange connection surface 1 and improve the reliability and stability of the connection, this application divides the flange connection surface 1 into four sub-sectors along the circumference: the first sub-sector 2, the second sub-sector 3, the third sub-sector 4, and the fourth sub-sector 5. In terms of layout, the first sub-sector 2 and the third sub-sector 4 are symmetrically arranged about the center of the flange, and the second sub-sector 3 and the fourth sub-sector 5 are also symmetrically arranged about the center of the flange. The symmetrical layout helps to balance the stress on the flange connection surface 1 in different directions and reduce stress concentration and potential failures caused by uneven stress.

[0034] To ensure a secure connection between the flange and adjacent components, multiple bolt holes 7 are evenly distributed along a bolt distribution circle 6 (the circle is centered on the flange and its radius is predetermined). The bolt holes 7 are used to insert bolts, and through the tightening action of the bolts, the flange and the gearbox gear ring are tightly connected together.

[0035] Regarding the pin layout, this application adopts a differentiated design. Specifically, multiple small pins 9 are evenly distributed along the small pin distribution circle 8, and these small pins 9 are arranged in the first sub-sector 2 and the third sub-sector 4. Simultaneously, multiple large pins 11 are evenly distributed along the large pin distribution circle 10, and these large pins 11 are arranged in the second sub-sector 3 and the fourth sub-sector 5. The diameter of the large pins 11 is larger than the diameter of the small pins 9. During wind turbine operation, the second sub-sector 3 and the fourth sub-sector 5 experience significant shear forces caused by wind shear and yaw torque, therefore large-diameter large pins 11 are used to enhance connection strength. In contrast, the first sub-sector 2 and the third sub-sector 4 experience relatively smaller forces, therefore small-diameter small pins 9 are used. This approach effectively reduces material costs while ensuring connection reliability.

[0036] Through the aforementioned differentiated pin layout, the bearing housing flange of this application can effectively address the problem of uneven stress on the flange connection surface 1 under complex working conditions, improve the reliability and stability of the connection, and reduce material and maintenance costs, thus providing a strong guarantee for the long-term stable operation of wind turbine generator sets.

[0037] Specifically, the main bearing housing flange is equipped with a reinforcing structure, such as a reinforcing rib, in both the first sector 2 and the third sector 4.

[0038] Based on the above embodiments, the fan angles of the first sub-sector 2 and the third sub-sector 4 are both obtuse angles, while the fan angles of the second sub-sector 3 and the fourth sub-sector 5 are both acute angles. That is, the fan angles of the first sub-sector 2 and the third sub-sector 4 are both set to obtuse angles. This obtuse angle design allows the first sub-sector 2 and the third sub-sector 4 to provide sufficient connection area and stability when subjected to relatively small forces, thereby ensuring the reliability of the connection. Correspondingly, the fan angles of the second sub-sector 3 and the fourth sub-sector 5 are set to acute angles. This acute angle design allows the second sub-sector 3 and the fourth sub-sector 5 to fit more tightly against adjacent components, especially when subjected to shear forces caused by large wind shear forces, yaw torques, etc., providing stronger connection strength and shear resistance.

[0039] Based on the above embodiments, the large pins 11 are distributed with equal fan angle density in the second sector 3 and the fourth sector 5, and the included angle between the centers of adjacent large pins 11 is 8°. The small pins 9 are distributed with equal fan angle density in the first sector 2 and the third sector 4, and the included angle between the centers of adjacent small pins 9 is 6°.

[0040] In other words, the second sector 3 and the fourth sector 5 are designated as critical stress areas due to the significant shear forces caused by wind shear and yaw torque. Within these areas, the large pins 11 are distributed at an equal sector angle density, meaning the included angle between the centers of adjacent large pins 11 is 8°. This ensures the uniform distribution of the large pins 11 within the critical stress areas, effectively enhancing the connection strength and shear resistance of these areas.

[0041] Correspondingly, in the first sector 2 and the third sector 4, the small pins 9 are also distributed with equal sector angle density, but the center angle between adjacent small pins 9 is 6°, which is more dense than the distribution of large pins. This ensures the reliability of the connection and avoids excessive use of materials, thus achieving effective cost control.

[0042] Based on the above embodiments, the diameter of the large pin 11 is 20%-50% larger than the diameter of the small pin 9. In other words, this application differentiates the diameters of the large pin 11 and the small pin 9; specifically, the diameter of the large pin 11 is 20%-50% larger than the diameter of the small pin 9. This ensures that in the second and fourth sub-sectors 3 and 5, where the stress is greater, the large pin 11 provides sufficient connection strength and shear resistance; while in the first and third sub-sectors 2 and 4, where the stress is less, the small pin 9 effectively reduces material costs while maintaining connection reliability.

[0043] Based on the above embodiments, the diameter of the large pin distribution circle 10 is larger than the diameter of the bolt distribution circle 6; the diameter of the small pin distribution circle 8 is larger than the diameter of the large pin distribution circle 10.

[0044] Specifically, the large pin 11 is arranged on the large pin distribution circle 10, and the diameter of the large pin distribution circle 10 is larger than the diameter of the bolt distribution circle 6. This allows the large pin 11 to provide stronger support and shear resistance when subjected to large shear forces, thereby effectively enhancing the connection strength of the flange connection surface 1 in the critical stress area. Secondly, the small pin 9 is arranged on the small pin distribution circle 8, and the diameter of the small pin distribution circle 8 is larger than the diameter of the large pin distribution circle 10. This allows the small pin 9 to provide additional connection stability in areas with relatively small stress, while avoiding interference with the large pin 11, ensuring a more reasonable and uniform stress distribution on the entire flange connection surface 1.

[0045] Based on the above embodiments, both the large pin 11 and the small pin 9 have a galvanized layer on their surfaces; both the large pin 11 and the small pin 9 have a chamfered structure at their ends. In other words, the galvanized layer on the surfaces of the large pin 11 and the small pin 9 can effectively prevent the wind power equipment from rusting in harsh environments such as humidity and salt spray, extend its service life, and reduce maintenance costs. The chamfered structure at the ends of the large pin 11 and the small pin 9 facilitates alignment during installation, reduces assembly resistance, improves assembly efficiency, and prevents the pin edges from scratching the mating surfaces.

[0046] This application also provides a wind turbine generator set, which includes the above-described bearing housing flange for a wind turbine generator set.

[0047] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A bearing housing flange for a wind turbine generator set, characterized in that, include: The flange connection surface (1) is provided with a first sector (2), a second sector (3), a third sector (4) and a fourth sector (5) along the circumferential direction. The first sector (2) and the third sector (4) are symmetrically arranged about the center of the flange, and the second sector (3) and the fourth sector (5) are symmetrically arranged about the center of the flange. Bolt holes (7) are evenly distributed along the bolt distribution circle (6) on the flange connection surface (1); Small pins (9) are evenly distributed along the small pin distribution circle (8) in the first sector (2) and the third sector (4); Large pins (11) are evenly distributed along the large pin distribution circle (10) in the second sector (3) and the fourth sector (5); The diameter of the large pin (11) is greater than the diameter of the small pin (9).

2. A bearing housing flange for a wind turbine generator set according to claim 1, characterized in that, The fan angles of the first sector (2) and the third sector (4) are both obtuse angles, while the fan angles of the second sector (3) and the fourth sector (5) are both acute angles.

3. A bearing housing flange for a wind turbine generator set according to claim 2, characterized in that, The large pins (11) are distributed in the second sector (3) and the fourth sector (5) with equal sector angle density, and the center angle between adjacent large pins (11) is 8°.

4. A bearing housing flange for a wind turbine generator set according to claim 3, characterized in that, The small pins (9) are distributed at equal fan angle densities in the first sector (2) and the third sector (4), and the center angle between adjacent small pins (9) is 6°.

5. A bearing housing flange for a wind turbine generator set according to claim 4, characterized in that, The diameter of the large pin (11) is 20%-50% larger than the diameter of the small pin (9).

6. A bearing housing flange for a wind turbine generator set according to claim 1, characterized in that, The diameter of the large pin distribution circle (10) is larger than the diameter of the bolt distribution circle (6).

7. A bearing housing flange for a wind turbine generator set according to claim 6, characterized in that, The diameter of the small pin distribution circle (8) is larger than the diameter of the large pin distribution circle (10).

8. A bearing housing flange for a wind turbine generator set according to claim 7, characterized in that, Both the large pin (11) and the small pin (9) have a galvanized layer on their surfaces.

9. A bearing housing flange for a wind turbine generator set according to claim 8, characterized in that, Both the large pin (11) and the small pin (9) have chamfered ends.

10. A wind turbine generator set, characterized in that, It includes a bearing housing flange for a wind turbine generator set as described in any one of claims 1-9.

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