Yaw speed reducer assembly and wind generating set

Abstract

The invention provides a yaw speed reducer assembly and a wind generating set. The yaw speed reducer assembly comprises a speed reduction unit, the speed reduction unit comprises a shell, and a tooth part is arranged on the inner circumferential side of one end close to the input side of the speed reduction unit; the planetary transmission assembly is arranged in the shell, is provided with at least one stage of planetary gear train and comprises an input sun gear, an output planet gear and an output planet carrier, the output planet gear and the output planet carrier are in transmission connection with each other, and peripheral teeth of the output planet gear are matched with the tooth part; and a plurality of rows of rollers, a roller of the plurality of rows of rollers having a cylindrical shape, and the plurality of rows of rollers being interposed between an output side of the housing and the output planet carrier to rotatably support the output planet carrier in an axial direction and a radial direction. According to the yaw speed reducer assembly, the structure is compact, and therefore the overall height can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and particularly to a yaw speed reducer assembly and a wind turbine generator set. Background Art

[0002] A wind turbine generator set includes a yaw system to rotate the nacelle by means of a motor so that the rotor faces the wind.

[0003] The yaw system includes a motor, a yaw speed reducer, a yaw bearing, a yaw brake disc, a yaw brake, etc. Conventional yaw speed reducers are usually supported by two tapered bearings, resulting in a relatively high axial dimension of the yaw speed reducer body and insufficient structural compactness. It works well in a space without size restrictions during installation, but cannot meet the usage requirements when used in a space-limited area. Summary of the Invention

[0004] An object of the present disclosure is to provide a yaw speed reducer assembly and a wind turbine generator set, where the yaw speed reducer assembly can improve the load-bearing capacity to enhance the reliability of the yaw speed reducer assembly and has a compact structure, thereby being able to reduce the overall height of the yaw speed reducer assembly.

[0005] According to an aspect of the present disclosure, there is provided a yaw speed reducer assembly, which includes a reduction unit. The reduction unit includes: a housing having a tooth portion provided on the inner peripheral side at one end near the input side of the reduction unit; a planetary transmission assembly disposed inside the housing, having at least one stage of planetary gear train and including an input sun gear and an output planet gear and an output planet carrier that are in transmission connection with each other, the outer peripheral teeth of the output planet gear being engaged with the tooth portion; and multiple rows of rollers, the rollers in the multiple rows of rollers being cylindrical, and the multiple rows of rollers being disposed between the output side of the housing and the output planet carrier to rotatably support the output planet carrier axially and radially.

[0006] Preferably, the multiple rows of rollers may include: at least one row of radial rollers disposed radially between the housing and the output planet carrier; at least one row of first axial rollers disposed axially between the housing and the output planet carrier; and at least one row of second axial rollers disposed axially between the housing and the output planet carrier and axially spaced apart from the at least one row of first axial rollers.

[0007] Preferably, the output planet carrier may include an annular protrusion on its outer periphery to form an inner raceway for the multiple rows of rollers, the annular protrusion extending radially outward and having a step, and the output side of the housing may include an annular recess on its inner periphery that matches the annular protrusion to form an outer raceway for the multiple rows of rollers.

[0008] Preferably, the at least one row of radial rollers can be arranged radially between the radial bottom surface of the annular recess and the radial top surface of the annular protrusion, the at least one row of first axial rollers can be arranged axially between the axial upper side surface of the annular recess and the axial upper side surface of the annular protrusion, and the at least one row of second axial rollers can be arranged axially between the axial lower side surface of the annular recess and the axial lower side surface of the annular protrusion.

[0009] Preferably, the output planet carrier can include an annular protrusion on its outer periphery to form an inner raceway for the multiple rows of rollers. The annular protrusion extends radially outward and has a step. And the output side of the housing can include an annular recess on its inner periphery that matches the annular protrusion to form an outer raceway for the multiple rows of rollers; or the output planet carrier can include an annular recess on its outer periphery to form an inner raceway for the multiple rows of rollers. The annular recess is recessed radially inward and has a step, and the output side of the housing can include an annular protrusion on its inner periphery that matches the annular recess to form an outer raceway for the multiple rows of rollers.

[0010] Preferably, the housing can include an upper housing and a lower housing connected to each other axially. Wherein, at least one of the ends of the upper housing and the lower housing facing each other constitutes a raceway for at least a partial row of the multiple rows of rollers.

[0011] Preferably, the yaw speed reducer assembly can further include an output unit. The output unit includes: an output shaft splined to the output planet carrier; and an output fixing member fixedly mounting the output shaft and the output planet carrier together axially.

[0012] Preferably, the yaw speed reducer assembly can further include an output unit. The output unit includes an output shaft that is an integral part with the output planet carrier.

[0013] Preferably, the output unit can further include a ring gear that is an integral part with the output shaft or splined to each other.

[0014] Preferably, the input unit can further include an input unit. The input unit includes: a motor including a rotating shaft; and an end cover arranged on the upper part of the reduction unit, and the housing is mounted on the end cover. Wherein, the rotating shaft axially passes through the end cover to be connected to the sun gear.

[0015] According to an aspect of the present disclosure, there is provided a wind turbine generator set, which includes the yaw speed reducer assembly as described above.

[0016] The yaw reducer assembly according to the present disclosure uses a multi-row roller bearing to achieve radial load support and axial load support, so that the bearing capacity can be improved to enhance the reliability of the yaw reducer assembly, and it has a compact structure, thereby being able to reduce the overall height of the yaw reducer assembly.

[0017] In addition, the yaw reducer assembly according to the present disclosure integrates the motor and the reducer, reducing the connecting components, thereby being able to reduce the overall weight and further reduce the overall height of the yaw reducer assembly, and being able to reduce the manufacturing cost.

[0018] In addition, the wind turbine generator set including the yaw reducer assembly as described above according to the present disclosure can ensure the maintainability of the nacelle of the wind turbine generator set and can improve the operating reliability of the yaw system, thereby enabling the wind turbine generator set to operate stably. Description of the Drawings

[0019] Through the following description of the embodiments of the present application in conjunction with the drawings, the above and other objects and features of the present application will become clearer, where:

[0020] Figure 1 Shows an assembly schematic diagram of a conventional yaw reducer for a wind turbine generator set;

[0021] Figure 2 Shows a structural schematic diagram of a yaw reducer assembly for a wind turbine generator set according to the first embodiment of the present disclosure;

[0022] Figure 3 Is Figure 2 A view of region I in;

[0023] Figure 4 Shows a structural schematic diagram of a yaw reducer assembly for a wind turbine generator set according to the second embodiment of the present disclosure;

[0024] Figure 5 Shows a structural schematic diagram of a yaw reducer assembly for a wind turbine generator set according to the third embodiment of the present disclosure.

[0025] Reference Numerals in the Drawings:

[0026] 10 - Motor; 11 - Rotating Shaft; 12 - End Cover;

[0027] 20 - Planetary Transmission Assembly; 210 - First Sun Gear; 211 - First Planet Gear; 212 - First Planet Carrier; 213 - First Snap Ring; 220 - Second Sun Gear; 221 - Second Planet Gear; 222 - Second Planet Carrier; 223 - Second Snap Ring; 224 - Annular Protrusion; 224a - Radial Top Surface; 224b - Axial Upper Side Surface; 224c - Axial Lower Side Surface; 225 - First Retaining Ring;

[0028] 30 - Output shaft; 31 - Ring gear;

[0029] 40 - Housing; 41 - Upper housing; 42 - Lower housing; 43 - Annular recess; 43a - Radial bottom surface; 43b - Axial upper side surface; 43c - Axial lower side surface;

[0030] 50 - Multi - row rollers; 51 - Radial rollers; 52 - First axial roller; 53 - Second axial roller;

[0031] 60 - Output fixing member; 61 - Third snap ring; 62 - Second retaining ring;

[0032] 70 - Sealing ring;

[0033] 81 - Yaw reducer; 810 - Reducer end cover; 813 - Input - end seal; 814 - Input - end bearing; 815 - Input gear shaft; 82 - Motor; 821 - Rotating shaft; 822 - Bearing; 823 - Bearing; 824 - Motor end cover; 825 - Sealing ring. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the technical concept of the present disclosure, the following will clearly, completely, and in detail describe the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be clear that the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present disclosure.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art. The terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. For those of ordinary skill in the art, the specific meaning of the terms used can be understood according to the specific situation in the present disclosure.

[0036] It will be understood that although terms such as "first", "second", etc. may be used herein to describe various elements, these elements will not be limited by these terms. Rather, these terms are only used to distinguish one element from another. Therefore, without departing from the teachings of the exemplary embodiments, the first element referred to in the exemplary embodiments described herein may also be referred to as the second element.

[0037] For ease of description, the "inner", "outer", "upper", and "lower" referred to hereinafter are consistent with the inner, outer, upper, and lower directions of the drawings themselves, but do not limit the structure of the present disclosure.

[0038] In addition, throughout the specification, when an element is described as being "disposed on", "connected to", or "coupled to" another element, the element can be directly "disposed on", directly "connected to", or directly "coupled to" the other element, or there can be one or more other elements therebetween.

[0039] The present disclosure aims to provide a yaw speed reducer assembly capable of reducing the overall height and a wind turbine generator including the yaw speed reducer assembly.

[0040] Figure 1 An assembly schematic diagram of a conventional yaw speed reducer for a wind turbine generator is shown. As Figure 1 shown, in the conventional structure, the yaw speed reducer 81 and the motor 82 are connected to each other. The motor 82 includes a rotating shaft 821, two bearings 822 and 823 for supporting the rotating shaft 821, a motor end cover 824, and a sealing ring 825. The input end of the conventional yaw speed reducer 81 includes a reducer end cover 810, an input end seal 813, an input end bearing 814, and an input gear shaft 815. Among them, the reducer end cover 810 and the motor end cover 824 are connected to each other. The rotating shaft 821 passes through the reducer end cover 810 and the motor end cover 824 and is connected to the input gear shaft 815. The input gear shaft 815 is rotatably connected to the reducer end cover 810 through the input end bearing 814 and is sealed through the input end seal 813.

[0041] Therefore, in the conventional structure, the yaw speed reducer 81 includes its own reducer end cover 810 and connection members (including the input end seal 813, the input end bearing 814, etc.) that cooperate with the reducer end cover 810, resulting in a complex structure and a relatively large axial dimension at the input end of the yaw speed reducer 81. In addition, although not shown, the output end of the conventional yaw speed reducer 81 is usually designed with two tapered bearings for support, resulting in a relatively high axial dimension and insufficient structural compactness of the yaw speed reducer. Therefore, the yaw speed reducer with the conventional structure has a relatively large volume and occupies a large installation space. When it needs to be installed in a space-limited position, it may not meet the usage requirements. In addition, the yaw speed reducer with the conventional structure has a greater impact on the maintenance space of the nacelle of the wind turbine generator, resulting in a decrease in the maintainability of the nacelle.

[0042] The present disclosure proposes a yaw speed reducer assembly that can overcome the above disadvantages. Hereinafter, the yaw speed reducer assembly according to an embodiment of the present disclosure will be described in detail with reference to Figures 2 to 5 A structural schematic diagram of a yaw speed reducer for a wind turbine generator according to a first embodiment of the present disclosure is shown.

[0043] Figure 2 is Figure 3 is Figure 2Illustration of Region I in

[0044] The yaw speed reducer assembly according to the first embodiment may include a speed reduction unit. The speed reduction unit may include: a housing 40 having a tooth portion provided on an inner circumferential side at one end near the output side of the speed reduction unit; a planetary transmission assembly 20 disposed inside the housing 40 and having at least one stage of planetary gear train, the at least one stage of planetary gear train including an input sun gear and an output planet gear and an output planet carrier that are in transmission connection with each other, and the outer circumferential teeth of the output planet gear being engaged with the tooth portion; and multiple rows of rollers 50, the rollers in the multiple rows of rollers 50 being cylindrical, and the multiple rows of rollers 50 being disposed between the output side of the housing 40 and the output planet carrier to rotatably support the output planet carrier axially and radially.

[0045] Although not shown, the yaw speed reducer assembly according to another embodiment provided by the present application may further include a cage for holding each of the multiple rows of rollers 50 in place.

[0046] The yaw speed reducer assembly according to the present embodiment may further include an input unit, and the input unit may include a motor 10 and an end cover 12. Specifically, the motor 10 may include a rotating shaft 11, the end cover 12 may be disposed on the upper part of the speed reduction unit, and the housing 40 may be mounted on the end cover 12. The rotating shaft 11 may axially pass through the end cover 12 to be connected to the input sun gear.

[0047] In addition, the yaw speed reducer assembly according to the present embodiment may further include an output unit, and the output unit includes an output shaft 30 and an output fixing member 60.

[0048] For the sake of convenience of description, in the present embodiment, the case where the planetary transmission assembly 20 has two stages of planetary gear trains is taken as an example for illustration. However, it should be understood that one stage or more stages of planetary gear trains may be provided according to the transmission requirements.

[0049] As Figure 2 shown, in the present embodiment, the planetary transmission assembly 20 may have a first-stage planetary gear train and a second-stage planetary gear train. The first-stage planetary gear train may include a first sun gear 210, a first planet gear 211, and a first planet carrier 212, the second-stage planetary gear train may include a second sun gear 220, a second planet gear 221, and a second planet carrier 222, and the housing 40 may be used as the ring gear of the first-stage planetary gear train and the second-stage planetary gear train. The first sun gear 210 serves as the input sun gear, and the second planet gear 221 and the second planet carrier 222 serve as the output planet gear and the output planet carrier, respectively.

[0050] The rotating shaft 11 may axially pass through the end cover 12 to be key-connected to the first sun gear 210 to transmit torque. Therefore, as Figure 1Compared with the conventional yaw speed reducer shown, the yaw speed reducer assembly according to the present embodiment can omit the speed reducer end cover and the connecting members provided on the end cover, but only use the end cover 12 of the input unit (i.e., the motor end cover) and directly connect the rotating shaft 11 to the first sun gear 210 after axially passing through the end cover 12. Therefore, the yaw speed reducer assembly according to the present embodiment can reduce the number of connecting members, reduce the overall weight, reduce the overall axial dimension and improve the structural compactness. In addition, the cost of the yaw speed reducer assembly can be reduced.

[0051] In addition, as Figure 2 shown, the rotating shaft 11 of the motor 10 is connected to the first sun gear 210, so that the first sun gear 210 rotates with the rotating shaft 11. For example, the rotating shaft 11 of the motor 10 can be connected to the first sun gear 210 by a flat key. The tooth portion of the first planet gear 211 meshes with the outer peripheral teeth of the first sun gear 210, and the tooth portion of the first planet gear 211 meshes with the tooth portion of the housing 40. Therefore, when the first sun gear 210 rotates, the first planet gear 211 rotates with the first sun gear 210.

[0052] The first planet gear 211 is fixedly connected to the first planet carrier 212 to drive the first planet carrier 212 to rotate when rotating. As an example, the first planet gear 211 has an inner hole, and the first planet carrier 212 has a protruding portion axially penetrating the inner hole. In this case, the first-stage planetary gear train may further include a first snap ring 213, and the first snap ring 213 is disposed above the first planet gear 211 to fixedly connect the first planet gear 211 to the first planet carrier 212. In other words, the first snap ring 213 can axially block the first planet gear 211 to prevent the first planet gear 211 from disengaging from the first planet carrier 212.

[0053] The first planet carrier 212 can be connected to the second sun gear 220 on the radially inner side, so that the second sun gear 220 can rotate with the first planet carrier 212. For example, the first planet carrier 212 can be connected to the second sun gear 220 by a flat key. The tooth portion of the second planet gear 221 meshes with the outer peripheral teeth of the second sun gear 220, and the tooth portion of the second planet gear 221 meshes with the tooth portion of the housing 40. Therefore, when the second sun gear 220 rotates, the second planet gear 221 rotates with the second sun gear 220.

[0054] The second planet gear 221 is fixedly connected to the second planet carrier 222 to drive the second planet carrier 222 to rotate. The connection manner between the second planet gear 221 and the second planet carrier 222 is similar to the connection manner between the first planet gear 211 and the first planet carrier 212. For this reason, similarly, the second-stage planetary gear train may also include a second snap ring 223 to prevent the second planet gear 221 from disengaging from the second planet carrier 222.

[0055] In addition, as described above, the speed reduction unit may include multiple rows of rollers 50 and a cage, and the cage may be configured to hold the multiple rows of rollers 50 such that the multiple rows of rollers 50 are interposed between the output side of the housing 40 and the second planet carrier 222 to rotatably support the second planet carrier 222 axially and radially. For simplicity of illustration, the cage is not shown.

[0056] As Figure 2 and Figure 3 shown, in this embodiment, the multiple rows of rollers 50 may include a structure of one row of radial rollers 51, one row of first axial rollers 52, and one row of second axial rollers 53. Among them, one row of radial rollers 51 is arranged radially between the housing 40 and the output planet carrier, one row of first axial rollers 52 is arranged axially between the housing 40 and the output planet carrier, and one row of second axial rollers 53 is arranged axially between the housing 40 and the output planet carrier and is axially spaced apart from one row of first axial rollers 52. However, it is not limited thereto, and two or more rows of radial rollers 51, two or more rows of first axial rollers 52, and two or more rows of second axial rollers 53 may be provided according to load requirements.

[0057] Here, a "radial roller" refers to a roller that provides radial support, and an "axial roller" refers to a roller that provides axial support. In this embodiment, the radial roller 51, the first axial roller 52, and the second axial roller 53 all have a cylindrical structure, so radial deformation can be reduced and transmission accuracy can be improved.

[0058] The second planet carrier 222 includes an annular protrusion 224 on its outer periphery to form an inner raceway for the multiple rows of rollers 50. The annular protrusion 224 may extend radially outward and have a step. The output side of the housing 40 may include an annular recess 43 on its inner periphery that matches the annular protrusion 224 to form an outer raceway for the multiple rows of rollers 50. In this case, the output side of the housing 40 can be used as a stationary outer ring, and the second planet carrier 222 can be used as a rotating inner ring.

[0059] More specifically, as Figure 3 shown, the annular protrusion 224 may have a radial top surface 224a and axially upper surface 224b and axially lower surface 224c that are opposite to each other axially. The annular recess 43 may have a radial bottom surface 43a and axially upper surface 43b and axially lower surface 43c that are opposite to each other axially.

[0060] The radial top surface 224a of the annular protrusion 224 and the radial bottom surface 43a of the annular recess 43 are radially spaced apart from each other to form a space for accommodating the radial roller 51. That is, the radial roller 51 can be radially disposed between the radial bottom surface 43a of the annular recess 43 and the radial top surface 224a of the annular protrusion 224. Here, the radial roller 51 can be in a slightly interference fit with the housing 40 and the second planet carrier 222 to prevent the radial offset of the radial roller 51. As an example, the sum of the interference amounts between the radial roller 51 and the housing 40 and the second planet carrier 222 in the radial direction can be about 10 μm, 12 μm, etc., but is not limited thereto, and the interference amount can be set as needed.

[0061] The axially upper side surface 224b of the annular protrusion 224 and the axially upper side surface 43b of the annular recess 43 are axially spaced apart from each other to form a space for accommodating the first axial roller 52. That is, the first axial roller 52 can be axially disposed between the axially upper side surface 43b of the annular recess 43 and the axially upper side surface 224b of the annular protrusion 224.

[0062] The axially lower side surface 224c of the annular protrusion 224 and the axially lower side surface 43c of the annular recess 43 are axially spaced apart from each other to form a space for accommodating the second axial roller 53. That is, the second axial roller 53 is axially disposed between the axially lower side surface 43c of the annular recess 43 and the axially lower side surface 224c of the annular protrusion 224. Here, each of the first axial roller 52 and the second axial roller 53 can be in a slightly clearance fit with the housing 40 and the second planet carrier 222 to prevent seizure. As an example, the sum of the clearances between each of the first axial roller 52 and the second axial roller 53 and the housing 40 and the second planet carrier 222 in the axial direction can be about 10 μm, 12 μm, etc., but is not limited thereto, and the clearance can be set as needed.

[0063] Optionally, the second planet carrier 222 may include an annular recess on its outer periphery to form an inner raceway for the multi-row rollers 50. The annular recess is recessed inwardly in the radial direction and has a step, and the output side of the housing 40 includes an annular protrusion on its inner periphery that matches the annular recess to form an outer raceway for the multi-row rollers 50.

[0064] Therefore, in this embodiment, the radial roller 51, the first axial roller 52, the second axial roller 53, the output side of the housing 40, and the second planet carrier 222 constitute a three-row roller bearing to achieve the support of axial loads and radial loads. Compared with the structure of two tapered roller bearings with two-point supports in the prior art, the height (i.e., the axial dimension) of the yaw reducer can be shortened, and the load-carrying capacity can be significantly improved.

[0065] Since the occupied space of the yaw speed reducer assembly according to this embodiment can be reduced, it can be installed in a relatively small space, thereby reserving a larger space for nacelle maintenance and improving the maintainability of the nacelle.

[0066] In addition, as Figure 2 shown, the reduction unit may further include a sealing ring 70. The sealing ring 70 may be disposed at the lower part of the housing 40 and is used to prevent external contaminants from entering the raceway for the multi-row rollers 50.

[0067] As Figure 2 and Figure 3 shown, in this embodiment, the housing 40 may include an upper housing 41 and a lower housing 42 that are connected to each other axially. At least one of the ends of the upper housing 41 and the lower housing 42 facing each other may form a raceway for at least a part of the multi-row rollers 50. Referring to Figure 2 and Figure 3 , as an example, the end of the upper housing 41 facing the lower housing 42 may form a raceway for the radial rollers 51. Specifically, the lower housing 42 may have a flange that extends upward axially, and the flange is radially superimposed on a part of the lower end of the upper housing 41 and forms a lower side wall of a groove for accommodating the radial rollers 51.

[0068] Therefore, the lower housing 42 can be installed after the radial rollers 51 are installed, thereby improving the convenience of installation and disassembly. It should be understood that the structure of the housing 40 is not limited thereto, and the dimensions, structures, connection methods, etc. of the upper housing 41 and the lower housing 42 can be adjusted according to requirements, and the housing 40 can also be formed as an integral part according to needs.

[0069] In addition, as described above, in this embodiment, the output unit may include an output shaft 30 and an output fixing member 60.

[0070] Specifically, the output shaft 30 may be splined to the second planet carrier 222 that serves as an output planet carrier. More specifically, the second planet carrier 222 may be splined to the outer peripheral layer of the output shaft 30 on the inner peripheral side.

[0071] The output fixing member 60 may fixedly mount the output shaft 30 and the second planet carrier 222 together axially. As Figure 2 and Figure 3 shown, the output fixing member 60 may fixedly mount the output shaft 30 and the second planet carrier 222 together axially to prevent the output shaft 30 from disengaging. As an example, the second planet carrier 222 may have an annular shoulder, and the output shaft 30 is provided with a step at its upper part. The bottom surface of the step is substantially flush with the upper surface of the shoulder. A second snap ring 62 is disposed on the bottom surface of the step and the upper surface of the shoulder and is fixed by a third circlip 61, thereby preventing the output shaft 30 from moving axially.

[0072] In addition, the output unit may further include a ring gear 31 for connecting to a large ring gear (not shown) of the yaw system. In this embodiment, the ring gear 31 and the output shaft 30 may be an integral part. Therefore, in this embodiment, the second planet carrier 222 and the output shaft 30 provided with the ring gear 31 are two independent components, which can be produced independently and then connected to each other by splines. Therefore, it is convenient for production and can be assembled together by a simple assembly method.

[0073] Hereinafter, the yaw speed reducer assembly according to the second embodiment of the present disclosure and the yaw speed reducer assembly according to the third embodiment of the present disclosure will be described in detail with reference to Figure 4 and Figure 5 FIGs.

[0074] Figure 4 FIG. 13 shows a schematic structural diagram of a yaw speed reducer assembly for a wind turbine according to the second embodiment of the present disclosure. The difference between the yaw speed reducer assembly according to the second embodiment and the yaw speed reducer assembly according to the first embodiment may be that: in the second embodiment, the second planet carrier 222 and the output shaft 30 having the ring gear 31 are an integral part.

[0075] In this embodiment, since the output shaft 30 having the ring gear 31 and the second planet carrier 222 are formed as an integral part, the output fixing member 60 in the first embodiment can be omitted, that is, the third circlip 61 and the second retaining ring 62 can be omitted. Therefore, the yaw speed reducer assembly according to this embodiment is convenient for installation and can further reduce the assembly cost. In addition, the yaw speed reducer assembly according to this embodiment may have a further optimized structure, reduce weight, and has very good economic value.

[0076] Figure 5 FIG. 14 shows a schematic structural diagram of a yaw speed reducer assembly for a wind turbine according to the third embodiment of the present disclosure. The difference between the yaw speed reducer assembly according to the third embodiment and the yaw speed reducer assembly according to the second embodiment may be that: in the third embodiment, the ring gear 31 and the output shaft 30 are connected to each other by splines.

[0077] Therefore, in this embodiment, ring gears 31 of different specifications can be installed on the output shaft 30 as needed, and the ring gear 31 can be flexibly replaced, thereby improving the applicability and maintainability of the yaw speed reducer assembly.

[0078] Although not shown, it is also feasible that the second planet carrier 222, the output shaft 30, and the ring gear 31 are unit components manufactured independently of each other.

[0079] In addition, regarding other components in the yaw speed reducer assembly according to the second embodiment and the yaw speed reducer assembly according to the third embodiment, the descriptions in the first embodiment can be applied in the same manner.

[0080] As described above, the yaw speed reducer assembly according to the present disclosure can utilize multiple rows of roller bearings to achieve radial load support and axial load support. Therefore, the load-bearing capacity can be improved to enhance the reliability of the yaw speed reducer assembly, and it can have a compact structure, thereby reducing the overall height of the yaw speed reducer assembly.

[0081] In addition, the yaw speed reducer assembly according to the present disclosure can integrate the motor and the speed reducer, reducing the connecting components, thereby reducing the overall weight and further reducing the overall height of the yaw speed reducer assembly, and reducing the manufacturing cost.

[0082] In addition, the yaw speed reducer assembly according to the above embodiment can be applied to a wind turbine generator set. The wind turbine generator set according to the present disclosure includes the yaw speed reducer assembly as described above, which can ensure the maintainability of the nacelle of the wind turbine generator set and improve the operation reliability of the yaw system, thereby enabling the wind turbine generator set to operate stably.

[0083] The specific embodiments of the present disclosure have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that, without departing from the principles and spirit of the present disclosure defined by the claims, these embodiments can be combined, modified, and perfected (for example, different technical features of the present disclosure can be combined to obtain a new technical solution). These combinations, modifications, and perfections should also be within the protection scope of the present disclosure.

Claims

1. A yaw speed reducer assembly, characterized in that, the yaw speed reducer assembly includes a speed reduction unit, and the speed reduction unit includes: a housing (40) provided with a tooth portion on the inner peripheral side at one end near the input side of the speed reduction unit; a planetary transmission assembly (20) disposed inside the housing (40), having at least one stage of planetary gear train, and including an input sun gear, an output planet gear and an output planet carrier that are drivingly connected to each other, and the outer peripheral teeth of the output planet gear cooperate with the tooth portion; and a multi-row roller (50), the rollers in the multi-row roller (50) are cylindrical, and the multi-row roller (50) is disposed between the output side of the housing (40) and the output planet carrier to rotatably support the output planet carrier axially and radially.

2. The yaw speed reducer assembly according to claim 1, characterized in that, the multi-row roller (50) includes: at least one row of radial rollers (51) disposed radially between the housing (40) and the output planet carrier; at least one row of first axial rollers (52) disposed axially between the housing (40) and the output planet carrier; and at least one row of second axial rollers (53) disposed axially between the housing (40) and the output planet carrier and axially spaced from the at least one row of first axial rollers (52).

3. The yaw speed reducer assembly according to claim 2, characterized in that, the output planet carrier includes an annular protrusion (224) on its outer periphery to form an inner raceway for the multi-row roller (50), the annular protrusion (224) extends radially outward and has a step, the output side of the housing (40) includes an annular recess (43) on its inner periphery that matches the annular protrusion (224) to form an outer raceway for the multi-row roller (50).

4. The yaw speed reducer assembly according to claim 3, characterized in that, the at least one row of radial rollers (51) is disposed radially between the radial bottom surface (43a) of the annular recess (43) and the radial top surface (224a) of the annular protrusion (224), the at least one row of first axial rollers (52) is disposed axially between the axially upper surface (43b) of the annular recess (43) and the axially upper surface (224b) of the annular protrusion (224), and the at least one row of second axial rollers (53) is disposed axially between the axially lower surface (43c) of the annular recess (43) and the axially lower surface (224c) of the annular protrusion (224).

5. The yaw speed reducer assembly according to claim 1, characterized in that, The output planet carrier includes an annular protrusion (224) on its outer periphery to form an inner raceway for the multi-row rollers (50). The annular protrusion (224) extends radially outward and has a step, and the output side of the housing (40) includes an annular recess (43) on its inner periphery that matches the annular protrusion (224) to form an outer raceway for the multi-row rollers (50); or The output planet carrier includes an annular recess on its outer periphery to form an inner raceway for the multi-row rollers (50). The annular recess is recessed radially inward and has a step, and the output side of the housing (40) includes an annular protrusion on its inner periphery that matches the annular recess to form an outer raceway for the multi-row rollers (50).

6. The yaw reducer assembly according to claim 1, characterized in that the housing (40) includes an upper housing (41) and a lower housing (42) connected to each other axially. Wherein, at least one of the ends of the upper housing (41) and the lower housing (42) facing each other constitutes a raceway for at least a part of the rows of rollers of the multi-row rollers (50).

7. The yaw reducer assembly according to claim 1, characterized in that the yaw reducer assembly further includes an output unit, and the output unit includes: an output shaft (30) splined to the output planet carrier; and an output fixing member (60) fixedly mounting the output shaft (30) and the output planet carrier together axially.

8. The yaw reducer assembly according to claim 1, characterized in that the yaw reducer assembly further includes an output unit, and the output unit includes an output shaft (30) which is an integral part with the output planet carrier.

9. The yaw reducer assembly according to claim 7 or 8, characterized in that the output unit further includes a ring gear (31) which is an integral part with the output shaft (30) or splined to each other.

10. The yaw reducer assembly according to claim 1, characterized in that the yaw reducer assembly further includes an input unit, and the input unit includes: a motor (10) including a rotating shaft (11); and an end cover (12) provided on the upper part of the reduction unit, and the housing (40) is mounted on the end cover (12), wherein, the rotating shaft (11) axially passes through the end cover (12) to connect to the sun gear.

11. A wind turbine generator set, characterized in that the wind turbine generator set includes the yaw reducer assembly according to any one of claims 1 to 10.

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