CN116378907A - Novel transmission chain of large-scale wind turbine generator and wind turbine generator - Google Patents

Abstract

The application discloses a novel transmission chain of a large-scale wind turbine and a wind turbine, which comprises a main shaft for connecting wind turbine blades, wherein a main shaft front bearing and a main shaft rear bearing which are fixedly sleeved on the circumferential side wall of the main shaft are respectively and rotatably connected with a front bearing seat and a rear bearing seat, and a parallel-stage large gear and a plurality of circumferentially distributed planetary transmission mechanisms are fixedly connected to the main shaft; any planetary transmission mechanism is provided with a parallel-stage pinion meshed with the parallel-stage large gear and an output shaft used for driving and connecting a generator set. Compared with the prior art, the utility model realizes first-stage speed increasing through one-stage parallel transmission, the installation position of the utility model is positioned behind the front bearing of the main shaft, the whole gear box is positioned between the front and rear main bearings, the space of the transmission chain is fully utilized, the structure is very compact, the size and the space of the whole engine room are saved, and the cost of other non-transmission chain parts such as a rear frame, an engine room cover and the like is reduced.

Description

Novel transmission chain of large-scale wind turbine generator and wind turbine generator

Technical Field

The utility model relates to the technical field of wind power generation equipment, in particular to the technical field of transmission mechanisms and speed increasing box devices of high-power wind power generation equipment, and specifically relates to a novel transmission chain of a large-scale wind turbine and a wind turbine.

Background

Wind power generation refers to converting kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source, is used by people for a long time, is very environment-friendly by utilizing wind power, has huge wind energy accumulation, and is therefore increasingly valued in all countries of the world. The wind energy resources in China are rich, the wind energy reserves which can be developed and utilized are about 10 hundred million kW, wherein the land wind energy reserves are about 2.53 hundred million kW, and the offshore wind energy reserves which can be developed and utilized are about 7.5 hundred million kW, which is 10 hundred million kW in total.

The applicant has searched for one of the most typical gearbox structures in the prior art by search ((wind power) AND (gearbox) OR (planetary gear) OR), concretely as follows:

the Chinese patent, publication No. CN201293074Y, discloses a duplex planetary double-arm wind power accelerating box, an input shaft is supported in a front box body through a bearing, a large planet wheel is fixedly arranged on a planet gear shaft and meshed with a sun wheel, and the main point is that a planet carrier is formed by connecting a front side plate and a rear side plate of the planet carrier through pins, the planet gear shaft is supported on the front side plate and the rear side plate of the planet carrier through the bearing, the front side plate of the planet carrier is integrated with the input shaft, the rear end of the planet gear shaft is supported on the rear side plate of the planet carrier, and the large planet wheel is positioned between the front side plate and the rear side plate of the planet carrier; the planet carrier rear side plate is supported on the rear box body through a bearing, the front end of the middle box body is fixedly connected with the annular gear and the front box body in sequence through a double-end stud, and the annular gear is meshed with the planet gear shaft. The utility model has compact structure, small volume and large speed increasing ratio, effectively solves the unbalanced load problem of the planetary gear, has stable transmission and high reliability, and improves the strength of the gear teeth of the sun gear.

The technology adopts a structural design similar to that of the existing mainstream wind power product, and wind power generation is performed in a single input and output mode. In order to improve the reliability of a gearbox, a transmission chain of the current speed-increasing high-power wind generating set removes a high-speed stage with higher failure rate on the basis of a high-speed transmission gearbox, namely, adopts medium-speed transmission of one-stage or multi-stage planetary transmission, greatly reduces the output rotating speed of the gearbox from about 1800rpm to about 300-600 rpm, and does not deeply consider proper output rotating speed from one extreme to the other extreme. Along with the acceleration of the wind generating set to the large-scale development, the speed-increasing type wind generating set gearbox increasingly adopts a multistage planetary serial structure. In order to make the whole drive chain relatively lighter in weight, the drive chain is relatively shorter, and the gear box is fully integrated or semi-integrated with the main shaft component and the generator. The main bearing generally adopts two single-row tapered roller bearings or single bearings with large taper angle double-row tapered rollers, and the two single-row tapered roller bearings are most common. Because the large-scale wind turbine is restricted by the tip speed ratio, the wind wheel rotating speed is very low, the torque is very large, and the first-stage planet of the gear box usually adopts 6, 7 or even 8 planet gears to carry out power division so as to improve the bearing capacity of the gear box, the first-stage planet transmission speed ratio is very small, generally about 2-3, closely related to the number of the planet gears, the more the number of the planet gears is, the smaller the achievable speed ratio is, therefore, the wind wheel rotating speed of the current large-scale wind turbine is only improved to the level of the wind wheel rotating speed of the small megawatt wind turbine after the first-stage planet transmission, and the effect of improving the rotating speed is very limited. And the planetary transmission is very sensitive to the position precision of the planetary wheel shaft mounting hole on the planet carrier, the uniform load coefficient can be greatly influenced by the position precision difference, the processing difficulty is definitely greatly increased for large-size parts, and the meshing load of each planet wheel, the inner gear ring and the sun wheel is mutually related, so that the reliability is also influenced. In addition, the primary annular gear is used as a large thin-wall part, the heat treatment deformation is difficult to control, and the large deformation has great influence on the hardening layer depth of the gear, the subsequent processing, the hardness and the strength of the gear. At present, in order to improve the power density of a gear box, a planetary gear is often supported by adopting a bearing without an outer ring, and an inner hole of the planetary gear is used as a bearing raceway, so that the heat treatment and processing difficulty of the planetary gear are also greatly improved. Therefore, the first-stage planetary-related parts are the most difficult and costly parts to manufacture of the gearbox, but are not matched with the effects that they can perform. Because the first-stage planetary speed ratio is very small, the whole transmission ratio of the gear box is not large, and the output rotating speed of the gear box is not high. The generator is generally a medium-speed permanent magnet generator, and the generator has the advantages of large size, heavy weight, difficult design and processing due to low rotating speed, and high price due to high cost of permanent magnet materials adopted by the generator. The structure of the speed-increasing wind turbine generator in the industry tends to be similar, along with the acceleration of the large-scale steps of the wind turbine generator, the transmission chain structure only carries out simple size amplification and local adaptive modification, the inner diameter of the tapered roller bearing is basically more than 2 meters and even exceeds 2.5 meters, and the size of a single bearing, namely the large-cone-angle double-row tapered roller bearing, is larger, the application is less, and the cost is more expensive. If the external diameter of the primary gear ring of the gear box reaches more than 3 meters and even exceeds 3.5 meters, and if the unit exceeds 15MW and even more than 20MW, the size and weight of relevant parts can be huge, which brings great challenges to the design and manufacturing limits of manufacturers in the industry, particularly bearing, gear box and generator suppliers, and equipment capacity and process capacity need to be continuously improved, so that the cost is high. Large and ultra-large wind turbines are often used in offshore wind farms with poor accessibility, have poor maintenance conditions and high maintenance cost, and once related important components fail, the tower needs to be replaced and maintained, so that the quality risk and the quality loss are very large. The current situation of the industry deviates from the social development trend of wind power price reduction and the national policy big environment. Therefore, to adapt to the requirements of large-scale wind turbines, especially large-scale offshore wind turbines, on economy, reliability and maintainability, the large-scale development of wind turbines cannot be simply duplicated and amplified, so that a novel method for solving the problems of large-scale generation of the existing high-power wind power transmission chain is needed: the processing difficulty is high, the assembly and the hoisting are difficult, the manufacturing and maintenance costs are high, and the volume and the mass of the equipment are large.

Disclosure of Invention

In order to solve the problems that the size of a gear set of a speed increasing box is increased, the space of a cabin is large, the volume and the mass of equipment are obviously increased, the load of a main bearing is multiplied and the like when the capacity of a wind turbine generator is increased under the single-shaft input and single-shaft output modes of the existing wind turbine speed increasing box; secondly, as the equipment size is increased, the difficulty and cost of manufacturing, installing and maintaining the whole equipment are increased for the wind power equipment installed and operated at high altitude; furthermore, once the equipment failure occurs in the speed increasing box structure adopting single input/output, the equipment must be completely stopped for maintenance, which further reduces the power generation efficiency. The novel transmission chain of the large wind turbine generator is used for replacing an existing speed increasing box with a single input/output mode, a fault unit can be stopped when a certain group of generators or the transmission chain is in fault, other parallel units are not affected, normal power generation can be continuously performed, and the problem of sudden reduction of generated energy caused by faults is solved; meanwhile, as the multi-generator set is adopted for sharing, the size of the equipment is obviously reduced, and the difficulty in manufacturing, assembling and hoisting is further reduced. The utility model also provides a wind generating set which is used for replacing the existing wind generating set, so that the equipment is smaller in size and lower in manufacturing, transporting and hoisting difficulties on the premise of the same installed capacity.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

the novel transmission chain of the large wind turbine generator comprises a main shaft for connecting wind turbine blades, wherein a main shaft front bearing and a main shaft rear bearing which are fixedly sleeved on the circumferential side wall of the main shaft are respectively and rotatably connected with a front bearing seat and a rear bearing seat, and a parallel-stage large gear and a plurality of circumferentially distributed planetary transmission mechanisms are fixedly connected to the main shaft; any planetary transmission mechanism is provided with a parallel-stage pinion meshed with the parallel-stage large gear and an output shaft used for driving and connecting a generator set.

Preferably, the parallel stage bull gear is mounted between and adjacent to the front and rear spindle bearings.

Preferably, the parallel-stage large gear and any parallel-stage small gear adopt helical gears, and the direction of an axial force F generated by meshing the parallel-stage large gear and the parallel-stage small gear is opposite to the direction of an axial force F generated by rotation of the wind power blade.

Preferably, the planetary transmission mechanism comprises an outer shell detachably and fixedly connected with the rear bearing seat, the outer shell is internally provided with the parallel pinion, the first planetary transmission unit and the second planetary transmission unit in a driving force output direction in a driving mode, and the second planetary transmission unit comprises the output shaft.

Preferably, the first planetary transmission unit comprises a first planet carrier, a plurality of first planet gears mounted on the first planet carrier according to a circumferential array, a first sun gear meshed with any first planet gear, the first planet carrier and the parallel-stage pinion are coaxially and fixedly connected, and the first sun gear is in driving connection with the second planetary transmission unit.

Preferably, the second planetary transmission unit comprises a second planet carrier, a plurality of second planet gears are arranged on the second planet carrier according to a circumferential array, a second sun gear is meshed with any second planet gear, the second sun gear is fixedly connected with the output shaft coaxially, and the second planet carrier is in driving connection with the first planetary transmission unit.

On the basis of refinement of the first planetary transmission unit, the second planetary transmission unit is further refined and combined, preferably, the second planetary transmission unit comprises a second planet carrier, a plurality of second planet gears are arranged on the second planet carrier according to a circumferential array, a second sun gear meshed with any second planet gear is fixedly connected with the output shaft coaxially, and the second planet carrier is in driving connection with the first sun gear.

Preferably, the second planet carrier and the output shaft are respectively provided with an output front bearing and an output rear bearing for connecting the outer shell.

In order to meet the manufacturing cost and meet the working stability requirement of the large wind turbine, preferably, the front bearing of the main shaft adopts a cylindrical roller bearing, and the rear bearing of the main shaft adopts a double-row tapered roller bearing.

Noteworthy are: as a technical complement to the utility model, on the basis of the technical content already disclosed, the utility model is based on different, especially special application scenes; for example, in consideration of the dual requirements of the radial dimension of the drive chain and the multiple sets of power output, a gear box or any other prior art transmission structure capable of being used for increasing speed can be connected to the output end of the main shaft in a driving manner to perform another set of power output, so as to realize a power output mode of 'n+1', wherein 'N' represents the number of pinion gears in parallel stages, and '1' represents the power output of the main shaft. Further, if the 'n+1' mode is adopted for output, the gravity center of the whole transmission chain structure can be moved backwards, the gravity center of the whole wind turbine generator is further balanced, and the structural design between the electric pile and the wind turbine generator is facilitated. Because the installation position of the output end of the main shaft is not limited by space, a gear box or a planetary transmission mechanism with the same output rotation speed as that of the parallel-stage pinion can be adopted, but if the application scene needs, the output rotation speed can be further increased or reduced so as to improve the compatibility of matching with different subsequent models and power generating sets.

The application also provides a large-scale wind generating set, including wind-powered electricity generation blade, speed increasing box and the generating set that the drive is connected, the speed increasing box adopts the novel drive chain of a large-scale wind generating set to realize that above-mentioned.

The beneficial effects are that:

1. compared with the prior art, the transmission structure with the transmission chain as the speed increasing box realizes first-stage speed increasing through one-stage parallel transmission, the installation position of the transmission chain is positioned behind the front bearing of the main shaft, the whole gear box is positioned between the front main bearing and the rear main bearing, the space of the transmission chain is fully utilized, the structure is very compact, the size and the space of the whole engine room are saved, and the cost of other non-transmission chain parts such as a rear frame, an engine room cover and the like is reduced.

2. The parallel-stage big gears are meshed with the plurality of parallel-stage small gears, the requirement on the circumferential distribution size precision of the mounting holes of the small gears of each parallel stage is not high, the precision of the center distance between the small gears of each parallel stage is only required to be ensured, and the processing difficulty is greatly reduced. The first-stage parallel transmission adopts a helical gear, so that the axial force generated by a part of wind wheels can be counteracted, the load of a bearing behind a main shaft can be reduced, a smaller-sized bearing model can be selected, and the bearing in front of the main shaft adopts a cylindrical roller bearing, so that the original high bearing price can be reduced.

3. The first-stage parallel transmission speed ratio is large, the input rotation speed of the subsequent planetary transmission can be obviously improved, the input torque is reduced, for example, 12 MW-30 MW, the first-stage planetary input torque is only equivalent to the level of the original gear box with the size of about 1MW through arranging different pinion boxes and adjusting the proper speed ratio, and the processing and the manufacturing are very easy for gear box manufacturers. Because the speed ratio of the whole gear box is high and is more than 2 times that of the existing medium-speed transmission gear box, the transmission chain can also adopt a high-speed permanent magnet generator and can also adopt a medium-speed permanent magnet generator in a compatible way.

4. The multi-output shaft provided by the utility model can be used for dispersing the power of the whole unit, so that the power of a high-speed permanent magnet generator can be effectively reduced, for example, if a large-scale wind turbine generator with the power of 12 MW-30 MW is used, the power of the high-speed permanent magnet generator can be between 2MW and 4MW, the size is smaller, and the weight is lighter.

5. The transmission chain has the advantages that most parts are relatively small, so that the transmission chain is convenient to maintain and replace, and besides parts and main bearing seats arranged on a main shaft, other parts such as parallel-stage pinions, planetary stages, bearings, generators and the like can be maintained and replaced even on a tower, so that the maintenance cost is greatly reduced. In addition, when a certain power transmission route breaks down and needs to be maintained and replaced, during the period of waiting for maintenance and replacement, the power transmission route which breaks down can be disconnected, for example, a coupling is removed, or load torque is not applied to a generator of the route, and the generators of the other routes can normally generate power, so that a lot of power generation losses can be recovered for owners, and the power transmission route is more remarkable in an ultra-large generator set.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an isometric view of a structure of an embodiment of the utility model.

Fig. 2 is a partial view of the structure of the present utility model according to an embodiment.

Fig. 3 is an enlarged view of the structure of the region a in fig. 2.

Fig. 4 is a front view of fig. 1.

Fig. 5 is a full cross-sectional view taken along section symbol B-B in fig. 4.

In the figure: 1-a main shaft; 2-a main shaft front bearing; 3-parallel stage large gear; 4-front bearing seats; 5-a rear bearing seat; 6-a main shaft rear bearing; 7-parallel stage pinions; 8-pinion front bearing; 9-pinion rear bearings; 10-a first planet carrier; 11-a first planetary gear; 12-a first ring gear; 13-a first sun gear; 14-a second planet carrier; 15-a second planetary gear; 16-a second sun gear; 17-an output shaft; 18-output rear bearings; 19-output front bearing; 20-planetary gear.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Example 1:

the present embodiment is taken as an example in the schemes provided in the present application, and details will be described with respect to the structure of the 5 parallel-stage pinions, however, the present embodiment is only for convenience of describing the principles of the present utility model, and under the same working principle, a person skilled in the art can fully realize schemes for arranging more than the 5 parallel-stage pinions provided in the present embodiment, for example, schemes for arranging 6, 7, and 8 parallel-stage pinions; at the same time, a scheme of arranging fewer, for example 4, 3 or two parallel-stage pinions may be adopted, and the number of planetary transmission mechanisms 20 and the number of subsequent generator sets are synchronously reduced/increased by adopting different parallel-stage pinions, but no matter how many groups are adopted, the scheme of only adjusting the number of planetary transmission mechanisms 20 for power output or the scheme of adaptively adjusting other mechanisms without making creative labor is reasonably understood to be an improvement which is not substantially different from the utility model.

Specifically, the embodiment provides a novel transmission chain of a large wind turbine, which comprises a main shaft 1 for connecting wind power blades, wherein the main shaft 1 is respectively and rotatably connected with a front bearing seat 4 and a rear bearing seat 5 through a main shaft front bearing 2 and a main shaft rear bearing 6 which are fixedly sleeved on the circumferential side wall of the main shaft 1, and the main shaft 1 is also fixedly connected with a parallel-stage large gear 3 and a plurality of circumferentially distributed planetary transmission mechanisms 20; any of the planetary gear sets 20 has a parallel stage pinion 7 meshed with the parallel stage bull gear 3, and an output shaft 17 for driving a connection generator set.

The main shaft 1 has the same function as the existing wind driven generator, and the free end of the main shaft 1 is used for being connected with a mounting seat of a wind power blade, so that the rotating torque generated by the wind power blade is directly transmitted to drive the main shaft 1 to rotate. The main shaft 1 and the parallel-stage big gear 3 are coaxially and fixedly connected and synchronously rotate, under the fixation of the main shaft front bearing 2 and the main shaft rear bearing 6, all movements of the main shaft 1 except the axial rotation are limited, under the drive of the main shaft 1, the parallel-stage big gear 3 rotates and simultaneously drives any parallel-stage small gear 7 to rotate, so that the torque provided by the rotation of the parallel-stage small gear 7 is increased in speed through the planetary transmission mechanism 20, and then the final high rotation speed and low torque are transmitted to the generator set through the output shaft 17 for generating electricity. It should be noted that, the high rotation speed in the embodiment means that the rotation speed of the output shaft 17 is greatly improved compared with that of the main shaft 1, and does not specifically refer to a certain rotation speed value; similarly, low torque means that the torque output from the output shaft 17 is greatly reduced as compared with that of the main shaft 1, and a specific torque value that is not changeable is not specified. The parameters set in the output are not the focus of the requirements of the structural scheme provided by the application, and the man skilled in the art can completely realize the adjustment of the rotation speed and the torque between the main shaft 1 and the output shaft 17 by changing the speed ratio between gears according to the scheme provided by the embodiment.

The output shaft 17 of this embodiment has 5, can drive 5 sets of generating sets simultaneously and work, and the electricity generation simultaneously, and its stability is better, and the size is also less than current wind-powered electricity generation set has and only one set, and is lower to the requirement of components and parts, more does benefit to manufacturing, installation, transportation and maintenance.

Example 2:

in this embodiment, the structure is refined on the basis of embodiment 1, specifically, as shown in fig. 2 and 3 in conjunction with the description, the parallel-stage large gear 3 is installed between the front spindle bearing 2 and the rear spindle bearing 6 and near the front spindle bearing 2. The parallel-stage large gear 3 is positioned behind the front bearing of the main shaft, the whole gear box is positioned between the front main bearing and the rear main bearing, the space of the transmission chain is fully utilized, the structure is very compact, the size and the space of the whole engine room are saved, and the cost of other non-transmission chain parts such as a rear frame, an engine room cover and the like is reduced.

In this embodiment, the parallel-stage large gear 3 and any parallel-stage small gear 7 are helical gears, and the direction of an axial force F1 generated by meshing the parallel-stage large gear 3 and the parallel-stage small gear 7 is opposite to the direction of an axial force F0 generated by rotation of the wind power blade. By adopting the helical gear, the axial force generated by a part of wind wheel can be counteracted, the load of the bearing behind the main shaft can be reduced, the bearing model with smaller size can be selected, and the bearing in front of the main shaft adopts a cylindrical roller bearing, so that the original high bearing price can be reduced.

Example 3:

on the basis of any one of the above embodiments, as further shown in fig. 1-5 in combination with the description, the planetary transmission mechanism 20 includes an outer housing detachably and fixedly connected to the rear bearing seat 5, and the outer housing is sequentially and drivingly connected with the parallel pinion 7, the first planetary transmission unit, and the second planetary transmission unit along the driving force output direction, and the second planetary transmission unit includes the output shaft 17.

In this embodiment, as shown in fig. 3, the first planetary transmission unit includes a first planet carrier 10, a plurality of first planet gears 11 mounted on the first planet carrier 10 in a circumferential array, a first sun gear 13 engaged with any one of the first planet gears 11, the first planet carrier 10 is fixedly connected coaxially with the parallel pinion 7, and the first sun gear 13 is in driving connection with the second planetary transmission unit.

On the basis of refinement of the first planetary transmission unit, the second planetary transmission unit is further refined and combined, as shown in the structure of fig. 3 and 5, the second planetary transmission unit comprises a second planet carrier 14, a plurality of second planet gears 15 mounted on the second planet carrier 14 according to a circumferential array, and a second sun gear 16 meshed with any second planet gear 15, the second sun gear 16 is fixedly connected with the output shaft 17 coaxially, and the second planet carrier 14 is in driving connection with the first sun gear 13.

In this embodiment, the second planet carrier 14 and the output shaft 17 are respectively provided with a front output bearing 19 and a rear output bearing 18 for connecting with the outer casing.

In order to meet the manufacturing cost and meet the working stability requirement of the large wind turbine, preferably, the front main shaft bearing 2 is a cylindrical roller bearing, and the rear main shaft bearing 6 is a double-row tapered roller bearing.

Example 4:

the application also provides a large-scale wind generating set, including wind-powered electricity generation blade, speed increasing box and the generating set that the drive is connected, the speed increasing box adopts the novel drive chain of a large-scale wind generating set to realize that above-mentioned.

The mode that this embodiment adopted multiple generator set simultaneous working's advantage lies in solving current single transmission electricity generation and once breaking down, can only lower the tower and change the problem of handling. Because most parts of the generator set provided by the embodiment are relatively small, the generator set is convenient to maintain and replace, and besides parts and main bearing seats arranged on a main shaft, other parts such as the parallel-stage pinion 7, the first planetary gear 11, the second planetary gear 15, various bearings, a generator and the like can be maintained and replaced even on a tower, so that the maintenance cost is greatly reduced. In addition, when a certain power transmission route breaks down and needs to be maintained and replaced, during the period of waiting for maintenance and replacement, the power transmission route which breaks down can be disconnected, for example, a coupling is removed, or load torque is not applied to a generator of the route, and the generators of the other routes can normally generate power, so that a lot of power generation losses can be recovered for owners, and the power transmission route is more remarkable in an ultra-large generator set. The power generation loss of operation and maintenance is a matter of frequent complaints of owners and is frequently claimed to host factories and component suppliers, and the transmission chain can minimize the operation and maintenance loss for all parties in the industry.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a novel drive chain of large-scale wind turbine, is including main shaft (1) that are used for connecting wind-powered electricity generation blade, its characterized in that: the main shaft (1) is respectively and rotatably connected with a front bearing seat (4) and a rear bearing seat (5) through a main shaft front bearing (2) and a main shaft rear bearing (6) which are fixedly sleeved on the circumferential side wall of the main shaft (1), and the main shaft (1) is also fixedly connected with a parallel-stage large gear (3) and a plurality of planetary transmission mechanisms (20) which are circumferentially distributed; any of the planetary gear sets (20) has a parallel-stage pinion (7) which meshes with the parallel-stage gearwheel (3), and an output shaft (17) for driving a connection to a generator set.

2. The novel transmission chain of the large-scale wind turbine according to claim 1, wherein the novel transmission chain is characterized in that: the parallel-stage large gear (3) is arranged between the main shaft front bearing (2) and the main shaft rear bearing (6) and is close to the main shaft front bearing (2).

3. The novel transmission chain of the large-scale wind turbine according to claim 1, wherein the novel transmission chain is characterized in that: the parallel-stage large gear (3) and any parallel-stage small gear (7) are bevel gears, and the direction of an axial force F1 generated by meshing the parallel-stage large gear (3) and the parallel-stage small gear (7) is opposite to the direction of an axial force F0 generated by rotation of the wind power blade.

4. The novel transmission chain of the large-scale wind turbine according to any one of claims 1-3, wherein: the planetary transmission mechanism (20) comprises an outer shell body which is detachably and fixedly connected with the rear bearing seat (5), the outer shell body is internally provided with the parallel-stage pinion (7), the first planetary transmission unit and the second planetary transmission unit in a driving force output direction in a driving mode, and the second planetary transmission unit comprises an output shaft (17).

5. The novel transmission chain of the large-scale wind turbine according to claim 4, wherein: the first planetary transmission unit comprises a first planet carrier (10), a plurality of first planet gears (11) arranged on the first planet carrier (10) according to a circumferential array, and a first sun gear (13) meshed with any one of the first planet gears (11), wherein the first planet carrier (10) is fixedly connected with the parallel-stage pinion (7) coaxially, and the first sun gear (13) is in driving connection with the second planetary transmission unit.

6. The novel transmission chain of the large-scale wind turbine according to claim 4, wherein: the second planetary transmission unit comprises a second planet carrier (14), a plurality of second planet gears (15) arranged on the second planet carrier (14) according to a circumferential array, and a second sun gear (16) meshed with any second planet gear (15), wherein the second sun gear (16) is fixedly connected with the output shaft (17) in a coaxial way, and the second planet carrier (14) is in driving connection with the first planetary transmission unit.

7. The novel transmission chain of the large-scale wind turbine according to claim 5, wherein: the second planetary transmission unit comprises a second planet carrier (14), a plurality of second planet gears (15) arranged on the second planet carrier (14) according to a circumferential array, and a second sun gear (16) meshed with any second planet gear (15), wherein the second sun gear (16) is fixedly connected with the output shaft (17) in a coaxial way, and the second planet carrier (14) is in driving connection with the first sun gear (13).

8. The novel transmission chain of the large-scale wind turbine according to claim 7, wherein: the second planet carrier (14) and the output shaft (17) are respectively provided with an output front bearing (19) and an output rear bearing (18) which are used for being connected with the outer shell.

9. The novel transmission chain of the large-scale wind turbine according to claim 1, wherein the novel transmission chain is characterized in that: the front spindle bearing (2) adopts a cylindrical roller bearing, and the rear spindle bearing (6) adopts a double-row tapered roller bearing.

10. The utility model provides a large-scale wind generating set, includes wind-powered electricity generation blade, speed increasing box and the generating set of drive connection, its characterized in that: the speed increasing box is realized by adopting the novel transmission chain of the large-scale wind turbine set according to any one of claims 1-3 and 5-9.

Images