Power generation transmission device and wind power generation equipment

Abstract

The invention discloses a power generation transmission device and wind power generation equipment. According to the power generation transmission device, at least the Nth-stage planetary acceleration mechanism in a speed increaser is arranged in a machine shell of a power generator, and the Nth-stage planetary acceleration mechanism is in transmission connection with a rotating shaft of the power generator. In other words, one part of the speed increaser is embedded into the generator, so that the integration level of the power generation transmission device is improved, and the axial length and size of the power generation transmission device and the wind power generation equipment carrying the power generation transmission device are reduced. When wind power generation equipment is installed, the axial length of the power generation transmission device is reduced, so that the arrangement difficulty of a speed increaser in a cabin is reduced, the power generation transmission device has higher rigidity, the bending stress of the power generation transmission device is obviously reduced, and the bending deformation of the power generation transmission device can be reduced; therefore, the risks of compression deformation and damage of the internal structure of the wind power generation equipment due to insufficient rigidity of the power generation transmission device are reduced, and the service life of the wind power generation equipment is prolonged.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a power generation transmission device and wind power generation equipment. Background Technology

[0002] In wind power generation equipment, speed increasers are used to transmit torque through multi-stage transmissions, thereby accelerating the rotor speed inside the generator and enabling it to rotate at high speed, thus achieving high-power generation. Wind power generation equipment is developing towards higher power and higher integration. To further improve power generation, the most effective way is to increase the torque density of the transmission chain.

[0003] However, due to the inherent space constraints of the nacelle, it is difficult to increase the torque density of the drivetrain by increasing the number of acceleration stages. In other words, the specifications of the drivetrain become the main limiting factor for improving the torque density of the speed increaser. Furthermore, when installing wind power generation equipment, larger-scale wind power generation equipment poses greater challenges to the joint strength and balance performance of various modules during installation. Summary of the Invention

[0004] The purpose of this application is to provide a power generation transmission device and a wind power generation equipment, which can improve the integration of the wind power generation equipment and reduce its size.

[0005] To solve the above-mentioned technical problems, the first aspect of this application provides a power generation transmission device, comprising: spindle; The speed increaser includes N stages of planetary acceleration mechanisms arranged sequentially and connected in a driving manner along the axial direction of the main shaft, wherein the first stage of the planetary acceleration mechanism is connected in a driving manner to the main shaft, and N is an integer greater than or equal to 1; A generator includes a shaft, a rotor, a stator, and a housing. The shaft, the rotor, and the stator are all located inside the housing. The rotor is fixedly connected to the outer periphery of the shaft, the stator surrounds the outer periphery of the rotor, and the stator is also fixed to the housing. At least a portion of the Nth-stage planetary acceleration mechanism is located inside the housing and is connected to the rotating shaft via a transmission. The Nth-stage planetary acceleration mechanism is used to drive the rotating shaft and the rotor to rotate relative to the stator.

[0006] The power generation transmission device of the first aspect of this application houses at least the Nth stage planetary acceleration mechanism of the speed increaser inside the generator housing, and the Nth stage planetary acceleration mechanism is drive-connected to the generator shaft. That is, by embedding a portion of the speed increaser inside the generator, the integration of the power generation transmission device is improved, and the axial length and volume of the power generation transmission device and the wind turbine equipment equipped with it are reduced, thereby reducing the mechanical design complexity of the wind turbine equipment. Furthermore, during the installation of the wind turbine equipment, the reduced axial length of the power generation transmission device helps to simplify the arrangement of the speed increaser within the nacelle, and the higher rigidity of the power generation transmission device significantly reduces bending stress, thus reducing bending deformation and lowering the risk of internal structural deformation and damage due to insufficient rigidity of the power generation transmission device, thereby extending the service life of the wind turbine equipment.

[0007] Optionally, the speed increaser further includes N stages of housings arranged and connected sequentially along the axial direction of the main shaft, with the Nth stage planetary acceleration mechanism correspondingly disposed in the housing, at least a portion of the Nth stage housing disposed in the housing and fixedly connected to the housing, and the Nth stage housing disposed between the rotor and the Nth stage planetary acceleration mechanism.

[0008] Optionally, when N > 1, the (N-1)th stage housing is fixedly connected to the outside of the casing, the (N-1)th stage planetary acceleration mechanism is disposed in the (N-1)th stage housing, and the (N-1)th stage planetary acceleration mechanism is drively connected to the Nth stage planetary acceleration mechanism.

[0009] Optionally, when N > 1, in the direction from the first-level housing to the Nth-level housing, the radial dimension of each level housing on the main shaft is smaller than the radial dimension of the previous level housing on the main shaft.

[0010] Optionally, when N > 1, the Nth stage planetary acceleration mechanism includes a final stage sun gear, a final stage planetary support, a final stage ring gear, and multiple final stage planetary gears. The final stage sun gear is coaxially and fixedly connected to the rotating shaft. The multiple final stage planetary gears are arranged around the final stage sun gear and mesh with it. The multiple final stage planetary gears are rotatably connected to the final stage planetary support. The final stage planetary support is drively connected to the (N-1)th stage planetary acceleration mechanism. The final stage ring gear is fixedly connected to the Nth stage housing. The final stage ring gear is arranged around the multiple final stage planetary gears and meshes with them.

[0011] Optionally, the Nth stage housing includes a first final stage sub-housing and a second final stage sub-housing arranged axially spaced along the main shaft. In the axial direction of the main shaft, the final stage gear ring is sandwiched between the first final stage sub-housing and the second final stage sub-housing, so as to jointly construct the housing of the Nth stage planetary acceleration mechanism with the first final stage sub-housing and the second final stage sub-housing.

[0012] Optionally, the Nth stage planetary acceleration mechanism further includes two final stage rotary bearings arranged axially spaced along the main shaft, with the two final stage rotary bearings sandwiched between the final stage planetary support and the Nth stage housing in the radial direction of the main shaft.

[0013] Optionally, when N > 1, the generator further includes a bracket disposed within the housing, and the bracket is located on the side of the Nth stage housing away from the (N-1)th stage housing, one end of the bracket is fixedly connected to the rotating shaft, and the other end of the bracket is fixedly connected to the rotor.

[0014] Optionally, the first-stage planetary acceleration mechanism includes a primary sun gear, a primary planetary support, a primary ring gear, and multiple primary planetary gears. The end of the primary sun gear near the generator is coaxially connected to the next-stage planetary acceleration mechanism. The multiple primary planetary gears are arranged around the primary sun gear and meshed with it. The multiple primary planetary gears are also rotatably connected to the primary planetary support. The primary ring gear is arranged around the multiple primary planetary gears and meshes with them.

[0015] The second aspect of this application provides a wind power generation device, which includes the power generation transmission device described in any of the first aspects.

[0016] The wind power generation equipment of this application, by incorporating the power generation transmission device described in the first aspect, can improve the integration of the power generation transmission device, reduce the axial length and volume of the power generation transmission device and the wind power generation equipment incorporating the power generation transmission device, and reduce the mechanical design difficulty of the wind power generation equipment. Furthermore, the reduced axial length of the power generation transmission device helps to simplify the arrangement of the speed increaser within the nacelle, and the power generation transmission device has higher rigidity, significantly reducing its bending stress and thus minimizing bending deformation. This reduces the risk of internal structural deformation and damage to the wind power generation equipment due to insufficient rigidity of the power generation transmission device, thereby extending the service life of the wind power generation equipment.

[0017] The power generation transmission device of this application has at least the following advantages compared with the prior art: The generator transmission device of this application can improve the integration of the generator transmission device, reduce the axial length and volume of the generator transmission device and the wind power generation equipment equipped with the generator transmission device, and reduce the mechanical design difficulty of the wind power generation equipment. Furthermore, the reduced axial length of the generator transmission device helps to simplify the placement of the speed increaser within the nacelle, and the generator transmission device has higher rigidity, significantly reducing its bending stress and thus reducing bending deformation. This lowers the risk of internal structural deformation and damage to the wind power generation equipment due to insufficient rigidity of the generator transmission device, thereby extending the service life of the wind power generation equipment. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the power generation transmission device in the embodiments of this application; Figure 2 yes Figure 1 The diagram shows a side view of the power generation transmission device. Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the power generation transmission device along the A-A' direction; Figure 4 This is a cross-sectional schematic diagram of a power generation transmission device equipped with a rotating bearing in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures 1. Generator transmission device; 11. Main shaft; 111. Main shaft bearing; 12. Speed ​​increaser; 121. Primary gearbox; 1211. First primary sub-gear; 1212. Second primary sub-gear; 122. Secondary gearbox; 1221. First and second secondary sub-gears; 1222. Second and second secondary sub-gears; 123. Tertiary gearbox; 1231. First and third tertiary sub-gears; 1232. Second and third tertiary sub-gears; 124. Final gearbox; 1241. First final stage sub-gear; 1242. Second final stage sub-gear; 125. Primary planetary acceleration mechanism; 1251. Primary sun gear; 1252. Primary planetary support; 1253. Primary gear ring; 1254. Primary... 126. Second-stage planetary gear, 1261. Second-stage planetary acceleration mechanism, 1262. Second-stage sun gear, 1263. Second-stage planetary support, 1264. Second-stage planetary gear, 127. Third-stage planetary acceleration mechanism, 1271. Third-stage sun gear, 1272. Third-stage planetary support, 1273. Third-stage planetary support, 1274. Third-stage planetary gear, 128. Final-stage planetary acceleration mechanism, 1281. Final-stage sun gear, 1282. Final-stage planetary support, 1283. Final-stage planetary support, 1284. Final-stage planetary gear, 13. Generator, 131. Shaft, 132. Rotor, 133. Stator, 134. Housing, 135. Support. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0022] In the embodiments of this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "opening," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] Wind power generation equipment uses multi-stage transmissions to convert the slow rotation of the wind turbine blades into high-speed rotation of the rotor inside the generator, thereby achieving high power generation efficiency. To further increase the power output of wind power generation equipment, the number of transmission stages can be increased to increase the rotor speed. However, wind power generation equipment is developing towards higher power and higher integration, and increasing the number of transmission stages directly leads to an increase in the size of the wind power generation equipment and a longer axial length of the power transmission device. When the axial length of the power transmission device increases, the mechanical relationship between the various modules of the wind power generation equipment changes significantly, and the balance may decrease. During the installation of wind power generation equipment, the coordination between the modules needs to be considered more carefully, which increases the installation difficulty. Furthermore, the increased axial length of the power transmission device directly increases its lever arm, resulting in a decrease in the stiffness of the power transmission device and an increase in its bending deformation. Considering that wind turbine blades are typically tens of meters to over 100 meters long and have a lot of weight, the bending deformation caused by the increased axial length of the power transmission device is also very significant, which in turn causes compressive deformation and damage to the internal structure of the wind power generation equipment, shortening its service life. Especially in the field of offshore wind power generation, the working environment of wind power equipment is more complex and variable, and the relevant usage scenarios place higher demands on the rigidity and stability of wind power equipment.

[0027] To address the aforementioned technical problems, one embodiment of this application provides a power generation transmission device that improves the integration of the power generation transmission device, reduces the axial length and volume of the power generation transmission device and the wind power generation equipment equipped with it, and reduces the mechanical design complexity of the wind power generation equipment. Furthermore, the reduced axial length of the power generation transmission device helps to simplify the arrangement of the speed increaser within the nacelle, and the device has higher rigidity, significantly reducing bending stress and thus minimizing bending deformation. This reduces the risk of internal structural deformation and damage to the wind power generation equipment due to insufficient rigidity of the power generation transmission device, thereby extending the service life of the wind power generation equipment.

[0028] The following is a detailed description of the implementation details of the power generation transmission device and wind power generation equipment in this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0029] Please see also Figures 1 to 4 , Figure 1 This is a three-dimensional structural schematic diagram of the power generation transmission device in the embodiments of this application. Figure 2 yes Figure 1 The diagram shown is a side view of the power generation transmission device. Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the power generation transmission device along the A-A' direction. Figure 4 This is a cross-sectional schematic diagram of a power generation transmission device equipped with a rotating bearing in an embodiment of this application.

[0030] The first aspect of this application provides a power generation transmission device 1, which is applied in a wind power generation device to transmit the torque generated when the wind drives the blades to rotate to its generator and accelerate the slow rotation of the blades, so that the generator can achieve high-efficiency power generation.

[0031] In this embodiment, the power generation transmission device 1 includes a main shaft 11, a speed increaser 12, and a generator 13. One end of the main shaft 11 is connected to a wind turbine blade (not shown), and the other end is connected to the speed increaser 12. The end of the speed increaser 12 away from the main shaft 11 is connected to the generator 13. Thus, the rotation of the wind turbine blade under wind force drives the main shaft 11 to rotate. The rotation of the main shaft 11 is accelerated by the speed increaser 12, resulting in high-speed rotation at the output of the speed increaser 12, which is then input to the generator 13, enabling the generator 13 to generate high-power electricity. A portion of the speed increaser 12 is embedded inside the generator 13, reducing the overall axial length of the power generation transmission device 1. This improves the integration of the power generation transmission device 1, reduces the axial length and volume of the power generation transmission device 1 and the wind power generation equipment equipped with it, and reduces the mechanical design complexity of the wind power generation equipment. Furthermore, the reduced axial length of the power generation transmission device 1 helps to reduce the difficulty of arranging the speed increaser in the nacelle. In addition, the power generation transmission device 1 has higher rigidity and its bending stress is significantly reduced, which can reduce the bending deformation of the power generation transmission device 1. This reduces the risk of compression deformation and damage to the internal structure of the wind power generation equipment due to insufficient rigidity of the power generation transmission device 1, thereby extending the service life of the wind power generation equipment.

[0032] Specifically, the speed increaser 12 includes N stages of planetary acceleration mechanisms arranged sequentially and connected along the axial direction of the main shaft 11. In the N stages, the first stage (primary planetary acceleration mechanism) is connected to the main shaft 11, and the Nth stage is connected to the generator 13. The generator 13 includes a shaft 131, a rotor 132, a stator 133, and a housing 134. The shaft 131, rotor 132, and stator 133 are all housed within the housing 134. The shaft 131 is connected to the Nth stage planetary acceleration mechanism. The rotor 132 is fixedly connected to the outer periphery of the shaft 131, and the stator 133 surrounds the outer periphery of the rotor 132 and is fixed to the housing 134. At least the Nth stage planetary acceleration mechanism is located within the housing 134 and is used to drive the shaft 131 and rotor 132 to rotate relative to the stator 133.

[0033] It is understandable that N is an integer greater than or equal to 1. When N=1, the Nth stage planetary acceleration mechanism is the first stage planetary acceleration mechanism / primary planetary acceleration mechanism. Correspondingly, the primary planetary acceleration mechanism is driven by the main shaft 11 and is located inside the housing 134, and is driven by the rotating shaft 131.

[0034] In some embodiments, the speed increaser 12 further includes N-stage housings sequentially arranged and connected along the axial direction of the main shaft 11, with the N-stage planetary acceleration mechanism correspondingly disposed within the N-stage housing. At least a portion of the N-stage housing is disposed within and fixedly connected to the housing 134, and the N-stage housing is located between the rotor 132 and the N-stage planetary acceleration mechanism. The N-stage housing and the rotor 132 are clearance-fitted.

[0035] When N=1, the Nth stage housing is the first stage housing / primary housing, and part of the primary housing can be located inside the housing 134, while another part can extend from inside the housing 134 to the outside of the housing 134 to be fixedly connected to the bearing seat (not shown) of the spindle 11. When N≥3, the last stage housing can also be called the rear housing, and the remaining housings between the first stage housing and the last stage housing can be called the intermediate housings.

[0036] In some embodiments, when N > 1, the (N-1)th stage housing is fixedly connected to the outside of the housing 134. Of course, when the (N-1)th stage planetary acceleration mechanism is also located inside the housing 134, the (N-1)th stage housing can also be located inside the housing 134.

[0037] In some embodiments, the generator 13 further includes a bracket 135 disposed within the housing 134. When N > 1, the bracket 135 is located on the side of the Nth stage housing away from the (N-1)th stage housing. The bracket 135 has two opposing ends. One end of the bracket 135 is fixedly connected to the rotating shaft 131, and the other end is fixedly connected to the rotor 132, so that the rotor 132 is clearance-fitted with the Nth stage planetary acceleration mechanism.

[0038] In some embodiments, multiple supports 135 may be provided, with the multiple supports 135 arranged at intervals around the rotating shaft 131, and all of the multiple supports 135 connected between the rotating shaft 131 and the rotor 132. By increasing the number of supports 135 to strengthen the connection between the rotating shaft 131 and the rotor 132, the overall stability of the power generation transmission device 1 can be improved.

[0039] It is understandable that when N > 1, the speed increaser 12 may include two or more stages of planetary acceleration mechanisms, such as three, four, five, or even more stages, and the planetary acceleration mechanism embedded in the housing 134 may be one stage or more. The following description uses N = 4 and the last stage of planetary acceleration mechanism embedded in the housing 134 as an example, but it is not intended to imply that the following content applies only to this example.

[0040] When N=4, the speed increaser 12 includes four stages of housings arranged sequentially and connected along the axial direction of the main shaft 11: primary housing 121, secondary housing 122, tertiary housing 123, and final housing 124. Correspondingly, the four planetary acceleration mechanisms are primary planetary acceleration mechanism 125, secondary planetary acceleration mechanism 126, tertiary planetary acceleration mechanism 127, and final planetary acceleration mechanism 128. Accordingly, the four planetary acceleration mechanisms are correspondingly located in the four housings and are sequentially connected for transmission.

[0041] It is understandable that when N is any other value, the number of stages in the enclosure is also N, and the N-stage planetary acceleration mechanism is correspondingly located in the N-stage enclosure.

[0042] In some embodiments, as the number of acceleration stages increases, the radial dimension of the corresponding planetary acceleration mechanism on the main shaft 11 decreases. That is, the radial dimension of the second-stage planetary acceleration mechanism 126 on the main shaft 11 is smaller than that of the primary planetary acceleration mechanism 125 on the main shaft 11, and so on for the remaining planetary acceleration mechanisms. Correspondingly, the size of the housing decreases as the number of stages increases. That is, the radial dimension of the second-stage housing 122 on the main shaft 11 is smaller than that of the primary housing 121 on the main shaft 11, and so on for the remaining housings. This arrangement improves the overall integration of the power generation transmission device 1, thereby reducing the size and weight of the power generation transmission device 1. At the same time, since the final-stage planetary acceleration mechanism 128 is embedded in the generator 13, the fixed connection to the end of the housing 134 is still the third-stage planetary acceleration mechanism 127, rather than the smaller final-stage planetary acceleration mechanism 128. This allows for an increase in the power generation of the generator 13 by increasing the number of transmission stages while maintaining the connection rigidity of the power generation transmission device 1.

[0043] In some embodiments, the primary housing 121 also accommodates a portion of the main shaft 11, that is, a portion of the main shaft 11 extends into the primary housing 121 and is drive-connected to the primary planetary accelerator mechanism 125, and the main shaft 11 is rotatable relative to the primary housing 121. At least one main shaft bearing 111 is provided within the primary housing 121, and the main shaft bearing 111 is located radially between the main shaft 11 and the primary housing 121. In this case, the primary housing 121 can serve as the bearing housing for the main shaft bearing 111, or it can be considered that the bearing housing for the main shaft bearing 111 can also serve as part of the primary housing 121. Optionally, the main shaft bearing 111 is a rotary bearing, which can be a ball bearing or other types of bearings; this application does not specifically limit this.

[0044] Preferably, there can be two or more bearings 111 for the main shaft, which can provide more support for the main shaft 11 and make the power generation transmission device 1 more stable and reliable.

[0045] In some embodiments, the primary planetary acceleration mechanism 125 includes a primary sun gear 1251, a primary planetary carrier 1252, a primary ring gear 1253, and a plurality of primary planetary gears 1254. The primary sun gear 1251 is coaxially connected to the secondary planetary acceleration mechanism 126 near the end of the generator 13. The primary planetary carrier 1252 surrounds the outer periphery of the primary sun gear 1251 and is fixedly connected to the main shaft 11. The plurality of primary planetary gears 1254 are arranged around the primary sun gear 1251 and meshed with it. The plurality of primary planetary gears 1254 are also rotatably connected to the primary planetary carrier 1252. The primary ring gear 1253 is arranged around the plurality of primary planetary gears 1254 and meshes with them. Thus, when the main shaft 11 rotates, the main shaft 11 drives the primary planetary support 1252 to rotate. The primary planetary support 1252 drives multiple primary planetary gears 1254 to revolve around the primary sun gear 1251. At the same time, due to the action of the primary ring gear 1253, each primary planetary gear 1254 rotates on its own axis while revolving around the sun gear. The rotation of multiple primary planetary gears 1254 drives the primary sun gear 1251 to rotate, and the primary sun gear 1251 then transmits the rotation to the secondary planetary acceleration mechanism 126.

[0046] In some embodiments, the main shaft 11 and the primary planetary support 1252 can be constructed as a single unit. And / or, the primary sun gear 1251 and the gear shafts fixedly connected to the secondary planetary support 1262 can be separately configured or constructed as a single unit. And / or, the shafts of the primary planetary support 1252 and the plurality of primary planetary gears 1254 can be separately configured. It is understood that other planetary acceleration mechanisms can also have similar configurations.

[0047] It should be noted that the multiple primary planetary gears 1254 arranged around the primary sun gear 1251 can be regarded as a rotatable gear ring around the primary sun gear 1251, the radius of which is larger than the radius of the primary sun gear 1251.

[0048] Understandably, in a planetary acceleration mechanism, when the planetary carrier acts as the driving element and the external gear ring is fixed, power / torque is input to the planetary carrier. The planetary gears rotate on their own axes while revolving around the sun gear, driving the sun gear to rotate. The transmission ratio is less than 1, achieving speed increase. Specifically, since the planetary gears rotate in the same direction as their revolution, their rotational speed is superimposed on their revolution speed. With the external gear ring fixed, the rapid rotation of the planetary gears drives the sun gear to rotate, resulting in the sun gear's output speed being higher than the input speed to the planetary carrier, thus achieving acceleration. For example, when the number of teeth on the gear ring is Zr and the number of teeth on the sun gear is Zs, the speed increase ratio (output speed / input speed) of the planetary acceleration mechanism is: i = 1 + (Zs / Zr). Since Zs / Zr is greater than 0, i.e., 1 + (Zs / Zr) is greater than 1, the output speed of the planetary acceleration mechanism increases. Therefore, the speed input from the main shaft 11 to the primary planetary carrier 1252, after passing through the primary planetary acceleration mechanism 125, is output by the primary sun gear 1251 at a higher speed.

[0049] The specific radius ratio / size among the primary sun gear 1251, primary ring gear 1253 and primary planetary gear 1254 can be selected and set according to actual needs, and this application does not impose specific limitations on this.

[0050] Understandably, the number of teeth on the primary sun gear 1251, the primary ring gear 1253, and the primary planetary gear 1254 can be selected and designed according to the actual required speed increase ratio, which will not be elaborated here.

[0051] In some embodiments, the primary gear ring 1253 may be configured as part of the primary housing 121. Specifically, the primary housing 121 includes a first primary sub-housing 1211 and a second primary sub-housing 1212 arranged axially spaced along the main shaft 11, with the primary gear ring 1253 sandwiched between the first primary sub-housing 1211 and the second primary sub-housing 1212, thus constructing the primary housing 121 as described above.

[0052] In some embodiments, a sealing structure may be provided between the primary gear ring 1253 and the first primary sub-box 1211 and the second primary sub-box 1212, respectively, to prevent the lubricating oil in the speed increaser 12 from leaking. At the same time, it can also prevent moisture, dust and other impurities from entering the speed increaser 12, thereby preventing the inside of the speed increaser 12 from being contaminated or corroded.

[0053] In some embodiments, the secondary planetary acceleration mechanism 126 includes a secondary sun gear 1261, a secondary planetary carrier 1262, a secondary ring gear 1263, and a plurality of secondary planetary gears 1264. The end of the secondary sun gear 1261 near the generator 13 is coaxially connected to the tertiary planetary acceleration mechanism 127. The secondary planetary carrier 1262 surrounds the outer periphery of the secondary sun gear 1261 and is fixedly connected to the primary sun gear 1251. The plurality of secondary planetary gears 1264 are arranged around the secondary sun gear 1261 and meshed with it. The plurality of secondary planetary gears 1264 are also rotatably connected to the secondary planetary carrier 1262. The secondary ring gear 1263 is arranged around the plurality of secondary planetary gears 1264 and meshes with them. Thus, when the primary sun gear 1251 rotates, it drives the secondary planetary support 1262 to rotate. The secondary planetary support 1262 drives multiple secondary planetary gears 1264 to revolve around the secondary sun gear 1261. At the same time, due to the action of the secondary ring gear 1263, each secondary planetary gear 1264 rotates on its own axis while revolving around the sun gear 1261. The rotation of multiple secondary planetary gears 1264 drives the secondary sun gear 1261 to rotate, and the secondary sun gear 1261 then transmits the rotation to the tertiary planetary acceleration mechanism 127.

[0054] It is understandable that the acceleration principle of the secondary planetary acceleration mechanism 126 is the same as that of the primary planetary acceleration mechanism 125, and will not be elaborated here. In this way, the rotational speed input to the spindle 11 can be accelerated by the primary planetary acceleration mechanism 125 and the secondary planetary acceleration mechanism 126 to output a higher rotational speed.

[0055] In some embodiments, the secondary gear ring 1263 can be configured as part of the secondary housing 122. Specifically, the secondary housing 122 includes a first secondary sub-housing 1221 and a second secondary sub-housing 1222 arranged axially spaced along the main shaft 11, with the secondary gear ring 1263 sandwiched between the first secondary sub-housing 1221 and the second secondary sub-housing 1222 to construct the aforementioned secondary housing 122. This improves the integration of the power generation transmission device 1 and facilitates its miniaturization design.

[0056] In some embodiments, a sealing structure may be provided between the secondary gear ring 1263 and the first secondary sub-box 1221 and the second secondary sub-box 1222, respectively, to prevent the lubricating oil in the speed increaser 12 from leaking. At the same time, it can also prevent moisture, dust and other impurities from entering the speed increaser 12, thereby preventing the inside of the speed increaser 12 from being contaminated or corroded.

[0057] It is understood that the first secondary sub-box 1221 is fixedly connected to the second primary sub-box 1212, and the radial dimension of the first secondary sub-box 1221 on the main shaft 11 is smaller than the radial dimension of the second primary sub-box 1212 on the main shaft 11.

[0058] In some embodiments, the first secondary sub-box 1221 and the second primary sub-box 1212 can be constructed as an integral structure, that is, the first secondary sub-box 1221 and the second primary sub-box 1212 are integrally formed into a single component, which can increase the overall rigidity of the power generation transmission device 1.

[0059] In some embodiments, the secondary planetary accelerator mechanism 126 further includes a secondary rotary bearing 1265 disposed between the secondary housing 122 and the secondary planetary support 1262, the secondary rotary bearing 1265 supporting the secondary planetary support 1262. In the axial direction of the main shaft 11, multiple secondary rotary bearings 1265 can be arranged at intervals, for example, two, with the two secondary rotary bearings 1265 disposed on opposite sides of the secondary planetary gear 1264. This provides multi-point support for the secondary planetary support 1262, improving its stability and thus enhancing the reliability of the power generation transmission device 1.

[0060] In some embodiments, the three-stage planetary accelerator mechanism 127 includes a third-stage sun gear 1271, a third-stage planetary carrier 1272, a third-stage ring gear 1273, and a plurality of third-stage planetary gears 1274. The end of the third-stage sun gear 1271 near the generator 13 is coaxially connected to the final-stage planetary accelerator mechanism 128. The third-stage planetary carrier 1272 surrounds the outer periphery of the third-stage sun gear 1271 and is fixedly connected to the second-stage sun gear 1261. The plurality of third-stage planetary gears 1274 are arranged around the third-stage sun gear 1271 and meshed with it. The plurality of third-stage planetary gears 1274 are also rotatably connected to the third-stage planetary carrier 1272. The third-stage ring gear 1273 is arranged around the plurality of third-stage planetary gears 1274 and meshes with them. Thus, when the second-stage sun gear 1261 rotates, it drives the third-stage planetary support 1272 to rotate. The third-stage planetary support 1272 drives multiple third-stage planetary gears 1274 to revolve around the third-stage sun gear 1271. At the same time, due to the action of the third-stage ring gear 1273, each third-stage planetary gear 1274 rotates on its own axis while revolving around the sun gear 1271. The rotation of multiple third-stage planetary gears 1274 drives the third-stage sun gear 1271 to rotate, and the third-stage sun gear 1271 then transmits the rotation to the final-stage planetary acceleration mechanism 128.

[0061] Understandably, the rotational speed input from the spindle 11 is accelerated by the primary planetary acceleration mechanism 125 and the secondary planetary acceleration mechanism 126, and then further accelerated by the tertiary planetary acceleration mechanism 127.

[0062] In some embodiments, the three-stage gear ring 1273 can be configured as part of the three-stage housing 123. Specifically, the three-stage housing 123 includes a first three-stage sub-housing 1231 and a second three-stage sub-housing 1232 arranged axially spaced along the main shaft 11, with the three-stage gear ring 1273 sandwiched between the first three-stage sub-housing 1231 and the second three-stage sub-housing 1232 to form the aforementioned three-stage housing 123. This improves the integration of the power generation transmission device 1 and facilitates its miniaturization design.

[0063] In some embodiments, a sealing structure may be provided between the third-stage gear ring 1273 and the first third-stage sub-box 1231 and the second third-stage sub-box 1232, respectively, to prevent the lubricating oil in the speed increaser 12 from leaking. At the same time, it can also prevent moisture, dust and other impurities from entering the speed increaser 12, thereby preventing the inside of the speed increaser 12 from being contaminated or corroded.

[0064] It is understandable that the first and third level sub-boxes 1231 are fixedly connected to the second and second level sub-boxes 1222, and the radial dimension of the first and third level sub-boxes 1231 on the main shaft 11 is smaller than the radial dimension of the second and second level sub-boxes 1222 on the main shaft 11.

[0065] In some embodiments, the first tertiary sub-box 1231 and the second secondary sub-box 1222 can be constructed as an integral structure, that is, the first tertiary sub-box 1231 and the second secondary sub-box 1222 are integrally formed into a single component, which can increase the overall rigidity of the power generation transmission device 1.

[0066] Understandably, the second and third level sub-boxes 1232 are fixedly connected to the housing 134, which can be by bolt connection, welding, or forming a single piece.

[0067] In some embodiments, the three-stage planetary accelerator mechanism 127 further includes a three-stage rotary bearing 1275 disposed between the three-stage housing 123 and the three-stage planetary support 1272, the three-stage rotary bearing 1275 being used to support the three-stage planetary support 1272. Specifically, multiple three-stage rotary bearings 1275 can be arranged at intervals along the axial direction of the main shaft 11, for example, two, with the two three-stage rotary bearings 1275 disposed on opposite sides of the three-stage planetary gear 1274. This provides multi-point support for the three-stage planetary support 1272, improving its stability and thus enhancing the reliability of the power generation transmission device 1.

[0068] In some embodiments, the final-stage planetary acceleration mechanism 128 includes a final-stage sun gear 1281, a final-stage planetary support 1282, a final-stage ring gear 1283, and a plurality of final-stage planetary gears 1284. The end of the final-stage sun gear 1281 away from the main shaft 11 is coaxially and fixedly connected to the rotating shaft 131 of the generator 13. The final-stage planetary support 1282 surrounds the outer periphery of the final-stage sun gear 1281 and is fixedly connected to the third-stage sun gear 1271. The plurality of final-stage planetary gears 1284 are arranged around the final-stage sun gear 1281 and meshed with the final-stage sun gear 1281. The plurality of final-stage planetary gears 1284 are also rotatably connected to the final-stage planetary support 1282. The final-stage ring gear 1283 is arranged around the plurality of final-stage planetary gears 1284 and meshes with the plurality of final-stage planetary gears 1284. Thus, when the third-stage sun gear 1271 rotates, it drives the final-stage planetary support 1282 to rotate. The final-stage planetary support 1282 drives multiple final-stage planetary gears 1284 to revolve around the final-stage sun gear 1281. At the same time, due to the action of the final-stage ring gear 1283, each final-stage planetary gear 1284 rotates on its own axis while revolving around the sun gear. The rotation of multiple final-stage planetary gears 1284 drives the final-stage sun gear 1281 to rotate, and the final-stage sun gear 1281 then transmits the rotation to the shaft 131 and the rotor 132.

[0069] Understandably, the rotational speed input from the spindle 11 is accelerated through three stages: the primary planetary acceleration mechanism 125, the secondary planetary acceleration mechanism 126, and the tertiary planetary acceleration mechanism 127, and then further increased through the final planetary acceleration mechanism 128.

[0070] In some embodiments, the final stage gear ring 1283 can be configured as part of the final stage housing 124. Specifically, the final stage housing 124 includes a first final stage sub-housing 1241 and a second final stage sub-housing 1242 arranged axially spaced along the main shaft 11, with the final stage gear ring 1283 sandwiched between the first final stage sub-housing 1241 and the second final stage sub-housing 1242 to construct the aforementioned final stage housing 124. This improves the integration of the power generation transmission device 1 and facilitates its miniaturization design.

[0071] It is understandable that the first final stage sub-box 1241 is fixedly connected to the housing 134, and the radial dimension of the first final stage sub-box 1241 on the main shaft 11 is smaller than the radial dimension of the second and third stage sub-boxes 1232 on the main shaft 11.

[0072] In some embodiments, the first final stage sub-box 1241, the second and third stage sub-box 1232, and the housing 134 can be constructed as an integral structure, that is, the second and third stage sub-box 1232, the housing 134, and the first final stage sub-box 1241 are integrally formed into a single component, which can increase the overall rigidity of the power generation transmission device 1.

[0073] Understandably, the second and third level sub-boxes 1232 are fixedly connected to the housing 134, which can be by bolt connection, welding, or forming a single piece.

[0074] It should be noted that the first final stage sub-box 1241 and the second final stage sub-box 1242 are respectively sealed to the final stage gear ring 1283 to prevent the lubricating oil in the speed increaser 12 from leaking into the generator 13. Furthermore, a sealing structure can also be provided between the second final stage sub-box 1242 and the shaft 131 to prevent lubricating oil leakage.

[0075] In some embodiments, the final-stage planetary accelerator mechanism 128 further includes a final-stage rotary bearing 1285 disposed between the final-stage housing 124 and the final-stage planetary support 1282, the final-stage rotary bearing 1285 supporting the final-stage planetary support 1282. In the axial direction of the main shaft 11, multiple final-stage rotary bearings 1285 can be arranged at intervals, for example, two, with the two final-stage rotary bearings 1285 disposed on opposite sides of the final-stage planetary gear 1284. This provides multi-point support for the final-stage planetary support 1282, improving its stability and thus enhancing the reliability of the power generation transmission device 1.

[0076] like Figure 4 As shown, each stage of the housing has a portion protruding toward the rotating bearing at the position of the corresponding rotating bearing. This portion can form the bearing seat of the corresponding housing, and each stage of the housing can be fixedly connected to the bearing seat of the previous stage of the housing.

[0077] The second aspect of this application provides a wind power generation device (not shown), which includes the power generation transmission device 1 described in the fourth aspect.

[0078] Typically, wind power generation equipment includes a tower (not shown), blades (not shown), and the aforementioned power generation transmission device 1. The tower is mounted on the ground or an artificially constructed platform, while the power generation transmission device 1 is mounted at the top of the tower. The blades are fixed to or driven by the main shaft 11 of the power generation transmission device 1. When airflow blows and drives the blades to rotate, the blades drive the main shaft 11 to rotate. The rotation of the main shaft 11 is accelerated by the speed increaser 12, causing the rotor of the generator 13 to rotate at high speed, thereby achieving high-power power generation.

[0079] The wind power generation equipment of this application, by incorporating the power generation transmission device 1 described in the first aspect, can improve the integration of the power generation transmission device 1, reduce the axial length and volume of the power generation transmission device 1 and the wind power generation equipment incorporating the power generation transmission device 1, and reduce the mechanical design difficulty of the wind power generation equipment. Furthermore, the reduced axial length of the power generation transmission device 1 helps to simplify the arrangement of the speed increaser within the nacelle, and the power generation transmission device 1 has higher rigidity, significantly reducing its bending stress and thus reducing bending deformation. This lowers the risk of internal structural deformation and damage to the wind power generation equipment due to insufficient rigidity of the power generation transmission device 1, thereby extending the service life of the wind power generation equipment.

[0080] The power generation transmission device and wind power generation equipment provided by the embodiments of this application have been described in detail above. Specific examples have been used in this document to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the ideas of this application. There may be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A power generation transmission device, characterized in that, include: spindle; The speed increaser includes N stages of planetary acceleration mechanisms arranged sequentially and connected in a driving manner along the axial direction of the main shaft, wherein the first stage of the planetary acceleration mechanism is connected in a driving manner to the main shaft, and N is an integer greater than or equal to 1; A generator includes a shaft, a rotor, a stator, and a housing. The shaft, the rotor, and the stator are all located inside the housing. The rotor is fixedly connected to the outer periphery of the shaft, the stator surrounds the outer periphery of the rotor, and the stator is also fixed to the housing. At least a portion of the Nth-stage planetary acceleration mechanism is located inside the housing and is connected to the rotating shaft via a transmission. The Nth-stage planetary acceleration mechanism is used to drive the rotating shaft and the rotor to rotate relative to the stator.

2. The power generation transmission device according to claim 1, characterized in that, The speed increaser also includes N-stage housings arranged and connected sequentially along the axial direction of the main shaft. The N-stage planetary acceleration mechanism is correspondingly disposed in the housing. At least a part of the N-stage housing is disposed in the housing and fixedly connected to the housing. The N-stage housing is disposed between the rotor and the N-stage planetary acceleration mechanism.

3. The power generation transmission device according to claim 2, characterized in that, When N > 1, the (N-1)th stage housing is fixedly connected to the outside of the casing, the (N-1)th stage planetary acceleration mechanism is located inside the (N-1)th stage housing, and the (N-1)th stage planetary acceleration mechanism is drively connected to the Nth stage planetary acceleration mechanism.

4. The power generation transmission device according to claim 2, characterized in that, When N > 1, in the direction from the first-level housing to the Nth-level housing, the radial dimension of each level housing on the main shaft is smaller than the radial dimension of the previous level housing on the main shaft.

5. The power generation transmission device according to claim 2, characterized in that, When N > 1, the Nth stage planetary acceleration mechanism includes a final stage sun gear, a final stage planetary support, a final stage ring gear, and multiple final stage planetary gears. The final stage sun gear is coaxially and fixedly connected to the rotating shaft. The multiple final stage planetary gears are arranged around the final stage sun gear and mesh with it. The multiple final stage planetary gears are rotatably connected to the final stage planetary support. The final stage planetary support is drively connected to the (N-1)th stage planetary acceleration mechanism. The final stage ring gear is fixedly connected to the Nth stage housing. The final stage ring gear is arranged around the multiple final stage planetary gears and meshes with them.

6. The power generation transmission device according to claim 5, characterized in that, The Nth stage housing includes a first final stage sub-housing and a second final stage sub-housing arranged axially along the main shaft. The final stage gear ring is sandwiched between the first final stage sub-housing and the second final stage sub-housing in the axial direction of the main shaft, so as to construct the housing of the Nth stage planetary acceleration mechanism together with the first final stage sub-housing and the second final stage sub-housing.

7. The power generation transmission device according to claim 5, characterized in that, The Nth stage planetary acceleration mechanism further includes two final stage rotary bearings arranged axially spaced along the main shaft, with the two final stage rotary bearings sandwiched between the final stage planetary support and the Nth stage housing in the radial direction of the main shaft.

8. The power generation transmission device according to claim 2, characterized in that, When N > 1, the generator further includes a bracket disposed inside the housing, and the bracket is located on the side of the Nth stage housing away from the (N-1)th stage housing. One end of the bracket is fixedly connected to the rotating shaft, and the other end of the bracket is fixedly connected to the rotor.

9. The power generation transmission device according to any one of claims 1-8, characterized in that, The first-stage planetary acceleration mechanism includes a primary sun gear, a primary planetary support, a primary ring gear, and multiple primary planetary gears. The primary sun gear is coaxially connected to the next-stage planetary acceleration mechanism at its end near the generator. The multiple primary planetary gears are arranged around the primary sun gear and meshed with it. The multiple primary planetary gears are also rotatably connected to the primary planetary support. The primary ring gear is arranged around the multiple primary planetary gears and meshes with them.

10. A wind power generation device, characterized in that, Includes the power generation transmission device as described in any one of claims 1-9.

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