Gearbox and wind turbine

Abstract

The utility model relates to the field of wind power technology, concretely relates to gear box and wind turbine. The first tooth piece and the second tooth piece that are arranged in parallel and mutually meshed are arranged in the gear box, the first tooth piece is located the oblique upper side of the second tooth piece, and the box body of gear box includes: integral type casing, the corner part of integral type casing is provided with arc profile, and the arc profile is matched with the first tooth piece gap, opening, setting up on integral type casing, the aperture of opening is respectively greater than the outside diameter of first tooth piece and second tooth piece, and the first tooth piece and opening are located the opposite side of second tooth piece respectively, and the oil level of opening is higher than gear box, cover, seal cover opening. The utility model changes the opening position and casing structure of gear box, can minimize the volume of box body, reduces the material of box body, realizes the weight reduction and the cost reduction, and the design of opening avoids the bottom of gear box, avoids the loosening of cover, ensures the rigidity and the sealing property of box body.

Description

Technical Field

[0001] This utility model relates to the field of wind power technology, specifically to gearboxes and wind turbines. Background Technology

[0002] In the wind power sector, gearbox design needs to consider both rigidity and weight reduction / cost reduction. In traditional solutions, gears are typically inserted from the top or bottom of the gearbox.

[0003] The problem with inserting the gears from the top of the gearbox is that, in the case where the gears are arranged in parallel and not horizontally, taking the scenario where the first gear is located diagonally above the second gear as an example, if the gearbox opens from the top, additional material is needed at the opening to ensure that the dividing surface is flat so that the cover can be assembled and to accommodate the first gear. This results in an increase in the size of the gearbox and an increase in the amount of material used, which fails to meet the requirements for weight reduction and cost reduction.

[0004] The problems with inserting gear components from the bottom of the gearbox are: on the one hand, the wind power industry faces strong vibrations and sea wind corrosion, and the cover installed at the bottom is prone to loosening and cannot meet the rigidity requirements; on the other hand, the bottom of the gearbox is usually equipped with an oil sump, and the connection between the cover and the gearbox opening is prone to leakage.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a gearbox and a wind turbine. By changing the opening position and shell structure of the gearbox, the gearbox volume can be minimized, the material used in the gearbox can be reduced, and weight reduction and cost reduction can be achieved. Moreover, the opening design avoids the bottom of the gearbox, prevents the cover from loosening, and ensures the rigidity and sealing of the gearbox.

[0007] According to one aspect of the present invention, a gearbox is provided for use in wind power generation equipment. The gearbox contains a first gear and a second gear arranged in parallel and meshing with each other. The first gear is located obliquely above the second gear. The gearbox housing includes: an integral shell with an arc-shaped profile at one corner, the arc-shaped profile being clearance-fitted with the first gear; an opening disposed on the integral shell, the diameter of the opening being larger than the outer diameters of the first gear and the second gear, the first gear and the opening being located on opposite sides of the second gear, and the opening being higher than the oil level of the gearbox; and a cover sealingly covering the opening.

[0008] In some embodiments, the gearbox is further provided with an oil pump, which is located diagonally below the second gear and on the same side as the first gear.

[0009] In some embodiments, the distance between the oil pump and the integrated housing, and the distance between the second toothed member and the cover and the integrated housing, are both less than a set distance.

[0010] In some embodiments, the geometrically changing regions of the integral housing are smoothly transitioned.

[0011] In some embodiments, the gearbox has different oil levels corresponding to different operating conditions, and the lowest position of the opening is higher than the highest oil level of the gearbox.

[0012] In some embodiments, the cover and the integral housing are fastened together by fasteners.

[0013] In some embodiments, the end edge of the cover and the end edge of the opening are also sealed and pressed together by a sealing ring.

[0014] In some embodiments, the cover is mounted vertically or obliquely on the side of the second toothed member opposite to the first toothed member.

[0015] According to another aspect of the present invention, a wind turbine is provided, the wind turbine being configured with a gearbox as described in any of the above embodiments.

[0016] In some embodiments, the first gear of the gearbox is connected to the generator of the wind turbine.

[0017] The beneficial effects of this utility model compared with the prior art include at least the following:

[0018] This utility model's gearbox adopts a one-piece shell, improving rigidity and stability. One corner of the one-piece shell features an arc-shaped contour that fits with the first gear tooth, reducing the gearbox volume at the location of the first gear tooth. An opening in the one-piece shell allows the first and second gear teeth to be inserted into the gearbox. The opening is located away from the first gear tooth, and both the opening and the first gear tooth are positioned on opposite sides of the second gear tooth. Therefore, the design of the opening eliminates the need for additional material to accommodate the first gear tooth and facilitate the connection of the cover, reducing the material usage of the gearbox. Thus, by changing the opening position and shell structure design, this utility model minimizes the gearbox volume and reduces material usage, achieving weight reduction and cost reduction. Furthermore, the opening is higher than the oil level in the gearbox, avoiding the bottom of the gearbox, maintaining a sealed connection with the cover, preventing the cover from loosening, ensuring the rigidity of the gearbox, and placing the connection between the cover and the opening above the oil sump, preventing oil leakage and ensuring the oil tightness of the gearbox.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] Figure 1 This diagram shows a front view of the gearbox in an embodiment of the present invention.

[0022] Figure 2 The diagram shows an exploded view of the gearbox in an embodiment of this utility model. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0024] The accompanying drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0025] The terms "first," "second," and similar words used in the specific description do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "left" and "right" indicate the orientation and positional relationship based on the orientation and positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, in the description of the present invention, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0026] It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0027] This utility model discloses a gearbox for use in wind power generation equipment. It is suitable for gearbox structures with parallel and meshing first and second gears inside, and the first gear located obliquely above the second gear. It can solve the problems of large gearbox volume caused by inserting the gears from the top of the gearbox, and easy loosening of the cover and oil leakage at the connection caused by inserting the gears from the bottom of the gearbox. It can reduce the weight and cost of the gearbox, while ensuring its rigidity and sealing performance.

[0028] Figure 1 The diagram illustrates the front view of the gearbox in an embodiment of this utility model. Figure 2 The diagram illustrates the exploded structure of the gearbox in an embodiment of this utility model, combined with... Figure 1 and Figure 2 As shown, the gearbox 100 provided in this embodiment of the present invention has a first tooth 111 and a second tooth 112 arranged in parallel and meshing with each other (the first contour 111' and the second contour 112' on the surface of the gearbox 100 correspond to the positions of the first tooth 111 and the second tooth 112, respectively). The first tooth 111 is located obliquely above the second tooth 112. The gearbox 100 housing includes:

[0029] The one-piece housing 121 has an arc-shaped profile 121a at one corner, and the arc-shaped profile 121a is in clearance fit with the first toothed member 111.

[0030] An opening 121b is provided on the integral housing 121. The diameter of the opening 121b is larger than the outer diameter of the first tooth 111 and the second tooth 112. The first tooth 111 and the opening 121b are located on opposite sides of the second tooth 112, and the opening 121b is higher than the oil level S of the gearbox 100.

[0031] Cover 122, sealing and closing opening 121b.

[0032] The parallel arrangement and mutual meshing of the first gear 111 and the second gear 112 means that the axis of the first gear 111 is parallel to the axis of the second gear 112, and the tooth surface of the first gear 111 meshes with the tooth surface of the second gear 112. The first gear 111 and the second gear 112 can be gears, transmission shafts with toothed structures, or other transmission components.

[0033] The first gear 111 being located diagonally above the second gear 112 means that, in the gearbox 100's installed and operational state, the first gear 111 is positioned between the horizontal side and the vertical top of the second gear 112. Specifically, an XY coordinate system is established with the axis Z2 of the second gear 112 as the origin, the horizontal extension direction as the X-axis, and the vertical extension direction as the Y-axis. The axis Z1 of the first gear 111 is located within the first or second quadrant, and the upper surface of the first gear 111 is higher than the upper surface of the second gear 112, forming a layout where the first gear 111 is diagonally above the second gear 112. In this layout, the first gear 111 is offset at one corner of the gearbox 100. The design of the opening 121b needs to avoid this corner to reduce material usage and also avoid the bottom oil sump 130 to ensure the rigidity and sealing of the gearbox.

[0034] The fact that the first tooth 111 and the opening 121b are located on opposite sides of the second tooth 112 means that, in the established XY coordinate system, the first tooth 111 (which can be the axis Z1 of the first tooth 111) and the opening 121b are located on the positive and negative sides of the X-axis, respectively. That is, the radial symmetry of the first tooth 111 and the opening 121b with respect to the second tooth 112 is not strictly required. As long as the vertical plane containing the Y-axis is used as the dividing plane, and the first tooth 111 and the opening 121b are located on opposite sides of the dividing plane, so that the opening 121b avoids the area where the first tooth 111 is located, and avoids adding material to accommodate the first tooth 111 and facilitate the connection of the cover 122, it is acceptable.

[0035] The gearbox 100 of this invention employs a one-piece housing 121 to enhance rigidity and stability. The one-piece housing 121 can be manufactured, for example, by integral casting. One corner of the one-piece housing 121 features an arc-shaped profile 121a that engages with the first gear 111 with a clearance fit, reducing the volume of the gearbox at the location of the first gear 111. An opening 121b allows the first gear 111 and the second gear 112 to be inserted into the gearbox 100. The opening 121b is located away from the first gear 111, and is situated on opposite sides of the first gear 111 and the second gear 112. Therefore, the design of the gearbox at the opening 121b eliminates the need for additional material to accommodate the first gear 111 and facilitate the connection of the cover 122, thus reducing the material usage of the gearbox 100. By modifying the position of the opening 121b and the design of the housing structure, this invention minimizes the gearbox volume, reduces material usage, and achieves weight and cost reduction. In addition, the opening 121b is higher than the oil level S of the gearbox 100 and avoids the bottom of the gearbox 100, which can maintain a sealed connection with the cover 122, prevent the cover 122 from loosening, ensure the rigidity of the gearbox, and make the connection between the cover 122 and the opening 121b above the oil sump 130 to prevent oil leakage at the connection and ensure the oil tightness of the gearbox 100.

[0036] In some embodiments, an oil pump 140 is also provided inside the gearbox 100. The oil pump 140 is located diagonally below the second gear 112, and the oil pump 140 and the first gear 111 are located on the same side of the second gear 112. That is, with the vertical plane containing the Y-axis as the dividing plane, the oil pump 140 (which may be the center of the oil pump 140) and the first gear 111 are located on one side of the dividing plane, and the opening 121b is located on the other side of the dividing plane. This design makes full use of the empty space on the side where the first gear 111 is located in the integrated housing 121, and achieves a reasonable layout inside the gearbox 100 while minimizing the volume of the housing.

[0037] In some embodiments, the distance between the oil pump 140 and the integrated housing 121, and the distance between the second toothed member 112 and the cover 122 and the integrated housing 121, are both less than a set distance. The set distance can be set as needed, for example, within a range of several millimeters to several centimeters, to minimize the volume of the housing while ensuring the stability of the housing shape. One feasible way to ensure the stability of the housing shape is to smoothly transition the geometric change areas of the integrated housing 121, for example, through rounded corner transitions, gradual curved surface transitions, etc., to avoid the integrated housing 121 being designed too close to components such as the second toothed member 112 and the oil pump 140 due to only considering minimization, resulting in stress concentration areas such as sharp points and concave corners.

[0038] In some embodiments, the gearbox 100 has different oil levels S under different operating conditions, and the lowest position of the opening 121b is higher than the highest oil level of the gearbox 100. Generally, after the gearbox 100 is completely stationary and the oil has fully returned, the oil level S reaches the highest oil level, and the lowest position of the opening 121b needs to be higher than this highest oil level to ensure that oil leakage can be effectively avoided under various operating conditions.

[0039] In some embodiments, the cover 122 and the integrated housing 121 are fastened together by fasteners 123. For example, the cover 122 and the integrated housing 121 can be fastened together by screwing, riveting, or other methods. Furthermore, the cover 122 and the integrated housing 121 can also be positioned using locating pins. Since the cover 122 is not located at the bottom of the gearbox 100, there is no issue of easy loosening; therefore, a stable connection can be achieved using fasteners such as bolts. In some embodiments, to ensure a tight fit between the cover 122 and the integrated housing 121, the end edge of the cover 122 and the end edge of the opening 121b can also be sealed and pressed together by a sealing ring (not specifically shown in the figure).

[0040] In the above embodiments, the cover 122 can be installed vertically or obliquely on the side of the second toothed member 112 opposite to the first toothed member 111. Specifically, in Figure 1 and Figure 2From this perspective, the first toothed member 111 is located at the upper right corner of the second toothed member 112. Therefore, the cover 122 can be installed vertically to the left of the second toothed member 112, tilted to the left of the second toothed member 112, or tilted to the upper left corner of the second toothed member 112. These three installation positions of the cover 122 all avoid the area where the first toothed member 111 is located, thus reducing the material used in the housing, and also avoid the oil sump 130 at the bottom, ensuring the rigidity and sealing of the housing.

[0041] This utility model embodiment also provides a wind turbine equipped with a gearbox 100 as described in any of the above embodiments. In one specific implementation, the first gear 111 of the gearbox 100 serves as a high-speed shaft connected to the generator of the wind turbine, and the second gear 112 of the gearbox 100 serves as a high-speed gear, transmitting torque to the high-speed shaft. In other implementations, the first gear 111 / second gear 112 can be connected to other components in the wind turbine. The wind turbine equipped with the aforementioned gearbox 100 can achieve weight and cost reduction, ensure structural stability, prevent oil leakage, and thus improve working performance.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A gearbox for use in wind power generation equipment, wherein the gearbox contains a first gear and a second gear arranged in parallel and meshing with each other, the first gear being located obliquely above the second gear, characterized in that, The gearbox housing includes: An integral housing, wherein one corner of the integral housing is provided with an arc-shaped profile, and the arc-shaped profile is in clearance fit with the first toothed member; An opening is provided on the integral housing, the diameter of the opening is larger than the outer diameter of the first gear and the second gear respectively, the first gear and the opening are located on opposite sides of the second gear respectively, and the opening is higher than the oil level of the gearbox; The cover seals and closes the opening.

2. The gearbox as described in claim 1, characterized in that, The gearbox is also equipped with an oil pump, which is located diagonally below the second gear and on the same side as the first gear.

3. The gearbox as described in claim 2, characterized in that, The distance between the oil pump and the integrated housing, as well as the distance between the second toothed member and the cover and the integrated housing, are both less than the set distance.

4. The gearbox as described in claim 3, characterized in that, The geometrically varied regions of the unibody shell transition smoothly.

5. The gearbox as described in claim 1, characterized in that, The gearbox has different oil levels corresponding to different operating conditions, and the lowest position of the opening is higher than the highest oil level of the gearbox.

6. The gearbox as claimed in claim 1, characterized in that, The cover and the integrated housing are fastened together by fasteners.

7. The gearbox as described in claim 6, characterized in that, The end edge of the cover and the end edge of the opening are also sealed and pressed together by a sealing ring.

8. The gearbox as claimed in claim 1, characterized in that, The cover is installed vertically or at an angle on the side of the second toothed member opposite to the first toothed member.

9. A wind turbine, characterized in that, It is equipped with a gearbox as described in any one of claims 1-8.

10. The wind turbine as described in claim 9, characterized in that, The first gear of the gearbox is connected to the generator of the wind turbine.

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