Gearbox and wind turbine testing device

Abstract

The embodiment of the present application provides a gear box and a wind turbine testing device, the gear box comprises a support frame, an input assembly and an output assembly, the input assembly is arranged on the support frame, the input assembly comprises an input shaft and an input gear arranged on the input shaft, the input assembly is multiple, the output assembly is arranged on the support frame, the output assembly comprises an output shaft and an output inner ring gear arranged on the output shaft, the output inner ring gear surrounds the input gears of the multiple input assemblies and is engaged with the multiple input gears simultaneously. The gear box of the embodiment of the present application is provided with the output inner ring gear on the output shaft and the multiple input gears are engaged simultaneously, since the inner ring gear is adopted for transmission, therefore the strength of the transmission structure is large, and the gear box can have a smaller structural volume.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission devices, in particular to a gear box and a wind turbine testing device. BACKGROUND

[0002] The gear box is a basic transmission device for increasing speed or reducing speed, which includes single-input single-output and multi-input single-output structures. In the related art, the multi-input single-output gear box is realized by using an external gear set for transmission, which results in the problems of low structural strength and large structure volume of the gear box. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the embodiments of the present application propose a gear box which has the advantages of large structural strength and small structure volume.

[0004] The embodiments of the present application also propose a wind turbine testing device.

[0005] The gear box of the embodiments of the present application comprises:

[0006] a support frame;

[0007] input assemblies provided on the support frame, the input assemblies comprising input shafts and input gears provided on the input shafts, and the input assemblies being a plurality of;

[0008] an output assembly provided on the support frame, the output assembly comprising an output inner ring gear provided on an output shaft, and the output inner ring gear surrounding and simultaneously engaging with the input gears of the plurality of input assemblies.

[0009] The gear box of the embodiments of the present application is provided with an output inner ring gear on an output shaft to simultaneously engage with a plurality of input gears. Since the inner ring gear is used for transmission, the strength of the transmission structure is large, and the gear box can have a small structure volume.

[0010] In some embodiments, the support frame is provided with a plurality of accommodation cavities, the input gears of the plurality of input assemblies are one-to-one provided in the plurality of accommodation cavities, and part of the teeth of the input gears can protrude out of the corresponding accommodation cavities in the radial direction of the input shaft to engage with the output inner ring gear.

[0011] In some embodiments, the input assembly further comprises at least two first bearings provided on the support frame, the two sides of the accommodation cavities corresponding to the input assemblies are respectively provided with the first bearings, and the first bearings are sleeved on the input shafts of the input assemblies.

[0012] In some embodiments, the output shaft includes a shaft body and a connecting seat, the connecting seat being disposed on the shaft body and arranged around the central axis of the shaft body, and the output internal gear ring being disposed on the connecting seat and arranged around the central axis of the shaft body.

[0013] In some embodiments, the connector is disc-shaped.

[0014] In some embodiments, the output shaft further includes a connecting shaft connected to the shaft body, wherein the central axis of the connecting shaft is collinear with the central axis of the shaft body, and the output internal gear ring is disposed around the connecting shaft;

[0015] The output component includes a second bearing sleeved on the connecting shaft. The support frame has a connecting hole. Both the connecting shaft and the second bearing are located in the connecting hole, and the second bearing is connected to the wall of the connecting hole.

[0016] In some embodiments, there are at least two second bearings, and the second bearings are provided at least at both ends of the connecting shaft.

[0017] In some embodiments, the input gear is disposed at the first end of the support frame, the first end of the support frame is located inside the output internal gear ring, and the second end of the support frame is used to connect to the drive member that drives the input component.

[0018] In some embodiments, on a projection plane orthogonal to the axial direction of the input shaft, the maximum linear distance of the projection of the support frame is greater than or equal to the outer diameter of the output internal gear ring.

[0019] The wind turbine testing device of this invention includes:

[0020] Base;

[0021] The gearbox is the gearbox described in any of the above embodiments, the gearbox is disposed on the base, and the support frame is connected to the base;

[0022] A driving component is connected to the support frame. There are multiple driving components, and each of the multiple driving components is connected to a corresponding input component.

[0023] A coupling, one end of which is connected to the output assembly;

[0024] A wind turbine generator set, wherein the wind turbine generator set is connected to the other end of the coupling.

[0025] The wind turbine testing device of this invention uses the gearbox of this invention, and because the gearbox has high structural strength, it can meet the structural strength requirements of the gearbox during type testing of wind turbines, thus ensuring the smooth progress of type testing. Attached Figure Description

[0026] Figure 1 This is a front sectional view of the gearbox according to an embodiment of the present invention;

[0027] Figure 2 yes Figure 1 Right view of the middle gearbox;

[0028] Figure 3 This is a schematic diagram of the wind turbine testing device according to an embodiment of the present invention.

[0029] Figure label:

[0030] 1. Support frame; 11. Receiving cavity; 12. Connecting hole; 2. Input component; 21. Input shaft; 22. Input gear; 23. First bearing; 3. Output component; 31. Output shaft; 311. Shaft body; 312. Connecting seat; 313. Connecting shaft; 32. Output internal gear ring; 33. Second bearing; 4. Base; 5. Drive component; 6. Coupling; 7. Wind turbine; 8. Foundation. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following is a reference appendix. Figure 1 -Appendix Figure 3 A gearbox and wind turbine test apparatus according to embodiments of the invention is described.

[0033] like Figures 1-2 As shown, the gearbox in this embodiment of the invention includes a support frame 1, an input component 2, and an output component 3.

[0034] Input component 2 is mounted on support frame 1. Input component 2 includes input shaft 21 and input gear 22 mounted on input shaft 21. Multiple input components 2 may be configured. Specifically, as shown... Figure 1As shown, the support frame 1 is a frame whose projection on a projection plane orthogonal to the left and right directions is annular. Multiple input components 2 are arranged around the central axis of the frame. The central axis directions of the input shaft 21 and the input gear 22 are in the left and right directions. Preferably, the input shaft 21 and the input gear 22 are an integral structure. It is understood that in other embodiments, when the gearbox has a housing, the support frame can also be part of the gearbox housing and located within the housing cavity, with both the input and output components also located within the housing cavity; or the support frame can also be a frame whose projection on a projection plane orthogonal to the left and right directions is rectangular or other polygonal; the input shaft 21 and the input gear 22 can also be connected by a key.

[0035] The output component 3 is mounted on the support frame 1. The output component 3 includes an output shaft 31 and an internal gear ring 32 mounted on the output shaft 31. The internal gear ring 32 surrounds and meshes with the input gears 22 of the multiple input components 2 simultaneously. Specifically, as shown... Figure 1 As shown, the left end face of the output internal gear ring 32 is provided with multiple bolt holes so that the output internal gear ring 32 can be connected to the output shaft 31 by bolts. The central axis of the output internal gear ring 32 and the output shaft 31 is in the left-right direction. The output internal gear ring 32 surrounds the outer circumference of multiple input gears 22 and meshes with multiple input gears 22 at the same time.

[0036] The gearbox of this embodiment of the invention has an output internal gear ring on the output shaft that meshes with multiple input gears simultaneously. Because an internal gear ring is used for transmission, the transmission structure has greater strength. At the same time, when the gearbox of this embodiment of the invention has the same transmission ratio as gearboxes in related technologies, the gearbox of this embodiment of the invention can have a smaller structural volume, or when the gearbox of this embodiment of the invention has the same volume as gearboxes in related technologies, the gearbox of this embodiment of the invention can have a larger transmission ratio.

[0037] In some embodiments, the support frame 1 is provided with a plurality of receiving cavities 11, and the input gears 22 of the plurality of input components 2 are respectively provided in the plurality of receiving cavities 11, and some teeth of the input gears 22 can extend out of the corresponding receiving cavity 11 in the radial direction of the input shaft 21 to mesh with the output internal gear ring 32.

[0038] like Figure 1 As shown, the support frame 1 is provided with multiple receiving cavities 11 arranged around its central axis. Each receiving cavity 11 has an opening on the outer circumferential surface of the support frame 1. Each receiving cavity 11 is provided with an input gear 22. During the rotation of the input gear 22 in the left and right direction, some teeth of the input gear 22 always protrude from the opening of the corresponding receiving cavity 11, so that the multiple input gears 22 can mesh with the output internal gear ring 32 to drive the output internal gear ring 32 and the output shaft 31 to rotate.

[0039] It is understood that the input gear is not limited to having some teeth protruding from the receiving cavity. In other embodiments, the input gear is located inside the support frame, and the outer circumferential surface of the annular support frame is provided with an annular groove around its circumference. The output internal gear ring is embedded in the annular groove and simultaneously meshes with multiple input gears.

[0040] In some embodiments, the input component 2 further includes at least two first bearings 23 disposed on the support frame 1, and the first bearings 23 are respectively disposed on both sides of the receiving cavity 11 corresponding to the input component 2, and the first bearings 23 are sleeved on the input shaft 21 of the input component 2.

[0041] like Figure 1 As shown, a first bearing 23 is provided on the left side of the receiving cavity 11 and a first bearing 23 is provided on the right side of the receiving cavity 11. Both first bearings 23 are provided on the support frame 1. The input shaft 21 of the input component 2 corresponding to the receiving cavity 11 passes through the two first bearings 23, and the input gear 22 located on the input shaft 21 is located in the receiving cavity 11.

[0042] The first bearing connects the input shaft and the support frame, and supports the input shaft and input gear, enabling the input gear to rotate stably within the housing cavity.

[0043] It is understood that, in some other embodiments, multiple first bearings may be provided on each side of the receiving cavity, depending on the stress conditions.

[0044] In some embodiments, the output shaft 31 includes a shaft body 311 and a connecting seat 312. The connecting seat 312 is disposed on the shaft body 311 and arranged around the central axis of the shaft body 311, and the output internal gear ring 32 is disposed on the connecting seat 312 and arranged around the central axis of the shaft body 311.

[0045] like Figure 1 As shown, the connecting seat 312 is located on the right end face of the shaft body 311 and extends outward. The output internal gear ring 32 is connected to the outer edge of the connecting seat 312 by multiple bolts and is located on the right side of the connecting seat 312. The central axis of the output internal gear ring 32 is collinear with the central axis of the shaft body 311. Preferably, the shaft body 311 and the connecting seat 312 are an integral structure.

[0046] It is understood that in other embodiments, the shaft body and the connecting seat may also be welded together or connected by a key.

[0047] In some embodiments, the connector 312 is disc-shaped.

[0048] like Figure 1As shown, the connecting seat 312 is a disc-shaped structure that extends radially outward from the shaft body 311 and surrounds the shaft body 311 circumferentially. The central axis of the disc-shaped connecting seat 312 is collinear with the central axis of the shaft body 311. The outer periphery of the connecting seat 312 has a horizontal section extending to the right from the connecting seat 312 and surrounds the shaft body 311 axially. The right end of the horizontal section has a vertical section that extends radially outward from the shaft body 311 and surrounds the shaft body 311 circumferentially. The left end face of the output internal gear ring 32 abuts against the right end face of the vertical section, and the output internal gear ring 32 is connected to the vertical section by multiple bolts, so that the connecting seat 312 is connected to the output internal gear ring 32.

[0049] It is understood that in other embodiments, the connecting seat may also be a disc with a hollowed-out shape, or the connecting seat may also be a connecting bracket, as long as the connecting bracket can connect the output internal gear ring and the shaft body.

[0050] In some embodiments, the output shaft 31 further includes a connecting shaft 313 connected to the shaft body 311, the central axis of the connecting shaft 313 being collinear with the central axis of the shaft body 311, and the output internal gear ring 32 being arranged around the connecting shaft 313; the output assembly 3 includes a second bearing 33 sleeved on the connecting shaft 313, the support frame 1 having a connecting hole 12, the connecting shaft 313 and the second bearing 33 both being disposed in the connecting hole 12, and the second bearing 33 being connected to the wall of the connecting hole 12.

[0051] like Figure 1 As shown, a connecting shaft 313 is provided at the right end of the shaft body 311. The central axis of the shaft body 311, the central axis of the connecting shaft 313 and the central axis of the output internal gear ring 32 are collinear. A connecting hole 12 is provided in the center of the support frame 1. The connecting shaft 313 passes through the connecting hole 12, and the wall of the connecting hole 12 is connected to the connecting shaft 313 through the second bearing 33, so that the output shaft 31 can rotate in the left and right directions relative to the support frame 1.

[0052] A connecting shaft is provided that is surrounded by an output internal gear ring, and the output shaft is connected to the support frame by passing the connecting shaft through the connecting hole. The output internal gear ring is arranged to surround multiple input gears, and the multiple input gears are arranged to surround the connecting shaft, thereby making full use of the space of the support frame, making the gearbox structure of the invention embodiment compact and able to have a smaller structural volume.

[0053] It is understood that in some other embodiments, when the gearbox has a housing, the output shaft may not have a connecting shaft, and the shaft body is connected to the housing via bearings.

[0054] In some embodiments, there are at least two second bearings 33, and at least two second bearings 33 are provided at both ends of the connecting shaft 313.

[0055] likeFigure 1 As shown, a second bearing 33 is fitted on the left end of the connecting shaft 313, and another second bearing 33 is fitted on the right end of the connecting shaft 313.

[0056] It is understood that in some other embodiments, any number of second bearings may be fitted onto the middle of the connecting shaft; or when the second bearings are a certain distance apart in the left and right directions, only one second bearing may be fitted onto the connecting shaft.

[0057] In some embodiments, the input gear 22 is disposed at the first end of the support frame 1, the first end of the support frame 1 is located inside the output internal gear ring 32, and the second end of the support frame 1 is used to connect the drive member 5 of the drive input component 2.

[0058] like Figure 1 As shown, the input gear 22 is located at the left end of the support frame 1, and the left end of the support frame 1 is located inside the output internal gear ring 32. The right end of the support frame 1 is located to the right of the output internal gear ring 32, and the drive component 5 of the drive input assembly 2 is located on the right end of the support frame 1. In other words, the output internal gear ring 32, the shaft body 311, and the connecting seat 312 are exposed outside the support frame 1.

[0059] The support frame has a simple structure and enables the input and output components to transmit power without the need for a housing. Therefore, the gearbox structure of this embodiment of the invention is simpler and lighter.

[0060] It is understood that in other embodiments, in order to avoid dust contamination of the input and output components, a housing or dust cover may be provided on the outside of the support frame, the input components, and the output components as a whole.

[0061] In some embodiments, on a projection plane orthogonal to the axial direction of the input shaft 21, the maximum linear distance of the projection of the support frame 1 is greater than or equal to the outer diameter of the output internal gear ring 32.

[0062] like Figure 2 and Figure 2 As shown, on the projection plane orthogonal to the axial direction of the input shaft 21, the outer periphery of the projection of the support frame 1 is circular. The left end of the support frame 1 has a first outer periphery surface with a circular projection, and the right end of the support frame 1 has a second outer periphery surface with a circular projection. The diameter of the second outer periphery surface is greater than the diameter of the first outer periphery surface. The diameter of the second outer periphery surface is greater than or equal to the outer diameter of the output internal gear ring 32, so that the gearbox can be fixedly installed through the right end of the support frame 1.

[0063] Understandably, the shape of the support frame is not limited to... Figure 3As shown, in some other embodiments, the projection of the support frame on the projection plane orthogonal to the axial direction of the input shaft 21 can also be rectangular, rhomboid, or irregular in shape. The maximum straight-line distance of the projection of the support frame is greater than or equal to the outer diameter of the output internal gear ring. In other words, at least a portion of the right end of the support frame is flush with or protrudes from the outer periphery of the output internal gear ring in a direction orthogonal to the left and right directions, so as to fix the support frame in place.

[0064] like Figure 3 As shown, the wind turbine testing device of this embodiment includes a base 4, a gearbox, a drive component 5, a coupling 6, and a wind turbine 7. The gearbox is the gearbox of this embodiment, which is mounted on the base 4 and the support frame 1 is connected to the base 4. The drive component 5 is connected to the support frame 1. There are multiple drive components 5, and each drive component 5 is connected to a corresponding input component 2. One end of the coupling 6 is connected to the output component 3, and the wind turbine 7 is connected to the other end of the coupling 6.

[0065] like ​ As shown, the wind turbine 7 and the base 4 are mounted on the foundation 8 to prevent the wind turbine 7 and the base 4 from moving. The base 4 is adjacent to the support frame 1 so that the gearbox can be mounted on the base 4. The shaft body 311 of the output shaft 31 is connected to the wind turbine 7 through the coupling 6. Multiple drive components 5 are connected to multiple input components 2 in a one-to-one correspondence. The drive component 5 is preferably a motor.

[0066] The wind turbine testing device of this invention uses the gearbox of this invention, and because the gearbox has high structural strength, it can meet the structural strength requirements of the gearbox during type testing of wind turbines, thus ensuring the smooth progress of type testing.

[0067] During type testing, multiple drive motors can be used with different power levels. In other words, multiple drive motors produce different torques at the same speed. Therefore, multiple input shafts and input gears also have different torques. The output internal gear ring is simultaneously driven by input gears with different torques, so that the power of the output internal gear ring and the output shaft is the sum of the power of multiple drive motors. Of course, any number of the multiple drive motors can also be used to drive, thereby achieving different combinations of drive power and output power to adapt to the rapid changes in the power level of wind turbine units and reduce energy loss.

[0068] In the description of this invention, it should be understood that the terms "left", "right", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0069] Furthermore, the terms "first" and "second" are used only to distinguish components and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A gear box, characterized in that, The utility model relates to a kind of input-output gear box, including: Support frame (1); Input assembly (2), the input assembly (2) is arranged on the support frame (1), the input assembly (2) includes input shaft (21) and is arranged on the input gear (22) of input shaft (21), the input assembly (2) is multiple; Output assembly (3), the output assembly (3) is arranged on the support frame (1), the output assembly (3) includes output shaft (31) and is arranged on the output inner ring gear (32) of output shaft (31), the output inner ring gear (32) surrounds multiple input gear (22) of the input assembly (2) and simultaneously engages multiple input gear (22); The input gear (22) is arranged at the first end of the support frame (1), the first end of the support frame (1) is located in the output inner ring gear (32), and the second end of the support frame (1) is used to connect the driving member (5) for driving the input assembly (2); The outer circumferential surface of the support frame (1) is provided with an annular groove around it, and the output inner ring gear (32) is embedded in the annular groove and simultaneously engages multiple input gears (22); The support frame (1) is provided with a plurality of accommodating cavities (11), and the input gears (22) of the plurality of input assemblies (2) are one-to-one corresponding to the plurality of accommodating cavities (11) and arranged in the plurality of accommodating cavities (11), and part of the teeth of the input gears (22) can be stretched out of the corresponding accommodating cavities (11) in the radial direction of the input shaft (21) to engage the output inner ring gear (32); The output shaft (31) includes a shaft body (311) and a connecting seat (312), the connecting seat (312) is arranged on the shaft body (311) and surrounds the central axis of the shaft body (311), and the output inner ring gear (32) is arranged on the connecting seat (312) and surrounds the central axis of the shaft body (311); The output shaft (31) further includes a connecting shaft (313) connected with the shaft body (311), the central axis of the connecting shaft (313) is collinear with the central axis of the shaft body (311), and the output inner ring gear (32) surrounds the connecting shaft (313); The output assembly (3) includes a second bearing (33) sleeved on the connecting shaft (313), the support frame (1) is provided with a connecting hole (12), the connecting shaft (313) and the second bearing (33) are arranged in the connecting hole (12), and the second bearing (33) is connected with the wall surface of the connecting hole (12).

2. The gear case of claim 1, wherein, The input assembly (2) further includes at least two first bearings (23) arranged on the support frame (1), and the first bearings (23) are arranged on both sides of the accommodating cavities (11) corresponding to the input assembly (2) and sleeved on the input shaft (21) of the input assembly (2).

3. The gear case of claim 2, wherein, The connecting seat (312) is disc-shaped.

4. The gear case of claim 3, wherein, The second bearing (33) is at least two, and at least two second bearings (33) are arranged at both ends of the connecting shaft (313).

5. The gear case of claim 4, wherein, In a projection plane orthogonal to the axial direction of the input shaft (21), the maximum straight-line distance of the projection of the support frame (1) is greater than or equal to the outer diameter of the output inner ring gear (32).

6. A wind turbine generator testing apparatus characterized by, Comprise: a base (4); a gear box, the gear box is described in any one of claims 1-5, the gear box is arranged on the base (4), and the support frame (1) is connected with the base (4); a driving member (5), the driving member (5) is connected with the support frame (1), the driving member (5) is multiple, and multiple driving members (5) are connected one by one with multiple input assemblies (2); a shaft coupling (6), one end of the shaft coupling (6) is connected with the output assembly (3); a wind turbine (7), the wind turbine (7) is connected with the other end of the shaft coupling (6).

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