WO2023092780A1 - Integrated wind turbine generator - Google Patents

Abstract

An integrated wind turbine generator, comprising a gear box and a generator coaxially connected to an output shaft of the gear box, wherein the end of the generator connected to the gear box is provided with a supporting end cover and a supporting bearing; the supporting end cover is used for sealing the generator and the gear box and isolating the generator from the gear box; the output shaft of the gear box extends into the generator and is connected to a rotor of the generator; and the supporting bearing is used for supporting the output shaft of the gear box. According to the integrated wind turbine generator, the weight of the generator is reduced, the axial length of the generator is shortened, the production costs are reduced, the assembly difficulty is reduced, and later maintenance is facilitated.

Description

An integrated wind generator

This application claims the priority of the Chinese patent application with the application number 202122941564.3 and the title of the invention "An Integrated Wind Power Generator" filed with the China Patent Office on November 26, 2021, the entire contents of which are hereby incorporated by reference in this application .

technical field

The present application relates to the field of motors, in particular to an integrated wind power generator.

Background technique

Vigorously developing clean energy is the development trend of countries all over the world towards low-carbon life, and the proportion of wind power and other new energy power generation in the power market is also increasing day by day. The devices required for wind power generation are called wind turbines. This kind of wind power generating set can be roughly divided into three parts: the wind wheel, the generator and the tower. The wind wheel rotates under the wind force, and the gear box drives the generator to rotate to generate electricity. Both ends of the generator rotor are supported on the machine base by bearings and end covers, and the generator is equipped with shafting and other components separately. The design also needs to consider issues such as generator grease, lubricating oil selection, bearing model and service life, and sealing; At the same time, the structure of the generator end cover and the inner and outer bearing covers is complex, and castings are mostly used, and molds need to be opened separately; in addition, the installation of bearings requires high processing precision for parts such as end covers, bearing chambers, bearing inner and outer covers, and bushings, and these factors are greatly increased. reduce the design and manufacturing costs of wind turbines.

Contents of the invention

The purpose of this application is to provide an integrated wind power generator, which reduces the weight of the generator, shortens the axial length of the generator, reduces the production cost, reduces the difficulty of assembly, and facilitates later maintenance .

In order to achieve the above purpose, the present application provides an integrated wind power generator, including a gear box and a generator coaxially connected with the output shaft of the gear box, and the end of the generator connected to the gear box is provided with a support end Cover and support bearing, the support end cover is used to seal and isolate the generator and the gearbox, the output shaft of the gearbox extends into the generator and is connected with the rotor of the generator, the The support bearing is used to support the output shaft of the gearbox.

Optionally, the generator includes a stator frame, a stator, a rotor, a rear end cover and a rear bearing, and the support end cover and the support bearing are arranged at the front end of the generator and at the rear of the gearbox end.

Optionally, the output shaft of the gearbox and the rotor are fixedly connected through a generator adapter plate.

Optionally, the rear end cover is provided with a brake disc for braking the rotor.

Optionally, the rotor is fixedly connected to the rotor bracket and the bracket transition ring, and the brake disc is arranged on the outer periphery of the bracket transition ring.

Optionally, a generator cooler for cooling the generator is also included.

Optionally, the generator cooler is an air-cooled cooler.

Optionally, the generator cooler is arranged on the periphery of the stator frame or the generator cooler is arranged on the rear end cover.

With respect to the above-mentioned background technology, the integrated wind power generator provided by this application includes a generator and a gearbox. The integrated wind power generator has a compact structure, so that one end of the generator and the output end of the gearbox share a support end cover and a support The bearing greatly reduces the weight of the generator. The output shaft of the gearbox is inserted into the generator to drive the rotor to rotate. The rotor shaft of the generator is eliminated, and the axial length of the generator is shortened. Higher maintainability and more advantages in product cost. At the same time, the integrated wind turbine reduces the difficulty of motor assembly and improves the production efficiency of the generator.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the schematic diagram of the integrated wind power generator provided by the present application;

Fig. 2 is a structural diagram of the generator in Fig. 1 .

in:

1-gearbox, 2-generator, 3-support end cover, 4-support bearing;

11-output shaft, 21-stator base, 22-stator, 23-rotor, 24-generator adapter plate, 25-rotor bracket, 26-bracket transition ring, 27-brake disc, 28-rear end cover, 29 - Rear bearing, 210 - Alternator cooler.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram of the integrated wind power generator provided by the present application, Fig. 2 is the structural diagram of the generator in Fig. 1, and this figure omits the transmission part of gearbox 1, only keeps The rear end cover of the gearbox 1 also supports the end cover 3 and the output shaft 11 .

The embodiment of the present application provides an integrated wind power generator, including a generator 2 and a gear box 1, and the generator 2 and the gear box 1 share a support end cover 3 and a support bearing 4, which greatly reduces the weight of the generator 2 and utilizes The output shaft 11 of the gearbox 1 extends into the generator 2 to drive the rotor 23 to run, the shafting of the generator 2 is canceled, the axial length of the generator 2 is shortened, the reliability of the generator 2 is higher, and the later maintainability is better High, product cost is more advantageous. At the same time, the compact integrated wind power generator reduces the difficulty of motor assembly and improves the production efficiency of the generator 2 .

Specifically, the shaft system of the gearbox 1 includes at least an input shaft and an output shaft 11 connected to the input shaft through multi-stage gear transmission. The input shaft is used to connect the fan blades, and the output shaft 11 is used to connect and drive the generator 2 rotor 23. Generator 2 comprises stator frame 21, the stator 22 that is arranged in stator frame 21 and the rotor 23 that is arranged on stator 22 inner periphery, and rotor 23 is connected with the output shaft 11 of gear box 1 that prolongs setting, and the rear end of rotor 23 Rear end cover 28 is set, and rear bearing 29 is provided as required (rear bearing 29 also can be canceled), and the rear end of generator 2 is sealed by rear end cover 28. The generator 2 and the gear box 1 also include a supporting end cover 3 and a supporting bearing 4 shared by the two, the output shaft 11 of the gear box 1 is coaxially connected with the rotor 23 of the generator 2, the output shaft passes through the supporting end cover 3 and can Supported by the supporting bearing 4, the supporting end cover 3 plays the role of sealing the front end of the generator 2 and the rear end of the gearbox 1, and the rear end cover 28 isolates the generator 2 and the gearbox 1.

In the embodiment of the present application, the output shaft 11 of the gearbox 1 and the rotor 23 of the generator 2 can be fixed coaxially through the generator adapter plate 24 . Exemplarily, the front end of the generator 2 shares the support end cover 3 with the gearbox 1, the output shaft 11 passes through the support end cover 3 and is supported by the support bearing 4, the rotor 23 is connected to the rotor bracket 25, and the rotor bracket 25 is provided with gears and The bolt hole and notch connected to the output shaft 11 of the box 1, the front flange end surface of the stator base 21 is provided with a threaded hole and a notch connected with the gearbox 1 and the supporting end cover 3, the stator base 21 passes through the supporting end cover 3 It is assembled with the gear box 1. The rotor 23 of the generator 2 is driven to rotate by the output shaft 11 of the gearbox 1 to convert mechanical energy into electrical energy.

The rotor bracket 25 can be a welded casting, and the connection method is bolts or bolts with pins to connect the rotor 23 . The rotor bracket 25 can also be transferred and connected with reference to the specifications and standards of the prior art. Further, the rotor bracket 25 is also provided with a bracket transition ring 26 , the outer periphery of the bracket transition ring 26 is connected to a brake disc 27 , and the brake disc 27 acts on the bracket transition ring 26 to brake the rotor 23 in a specific state. In addition, in order to facilitate maintenance, the rotor bracket 25 can also be connected to the output shaft 11 of the gearbox 1 through an adapter flange. The bracket transition ring 26 and the rotor bracket 25 can be integrally cast and formed as an integral structure, or can be set as a split structure. The detachable connection is performed through connecting parts such as bolts, which is not specifically limited in the present application.

On the basis of the above-mentioned embodiments, in order to prevent the integrated wind generator from generating heat during long-term operation, the integrated wind generator also includes a generator for cooling the generator 2, especially the stator 22 of the generator 2. machine cooler 210. The generator cooler 210 can be arranged on the periphery of the stator frame 21 as shown in FIG. Execute with reference to existing technical standards. It should be noted that the generator cooler 210 here is not limited to an air-cooled cooler, and for a high-power, large-capacity integrated wind turbine, the generator cooler 210 may also use a liquid-cooled or water-cooled cooler.

The integrated wind power generator provided by this application integrates the gearbox 1 and the generator 2, the output shaft 11 of the gearbox 1 and the rotor 23 of the generator 2 are coaxially connected, and the supporting end cover 3 and the supporting bearing 4 are powered by the generator. The motor 2 and the gearbox 1 are shared, that is, the support end cover 3 serves as both the rear end cover of the gearbox 1 and the front end cover of the generator 2, and the support bearing 4 serves as both the rear bearing of the gearbox 1 and the generator 2 The front bearing is shared by the support end cover 3 and the support bearing 4, the output shaft 11 replaces the shafting of the generator 2, shortens the axial length of the generator 2, the rotor 23 of the generator 2 and the output shaft 11 of the gearbox 1 connected, driven by the output shaft 11 of the gearbox 1, the rotor 23 is driven to generate electricity.

For the large-capacity wind-driven generator 2 , a lot of material cost and equipment mold opening cost are saved, thereby reducing the manufacturing cost of the large-capacity wind-driven generator 2 . The above-mentioned integrated wind power generator omits part of the shafting structure of the generator 2, and the output shaft 11 of the gearbox 1 is extended into the generator 2 to drive the rotor 23 to run, which simplifies the structure of the generator 2 and improves the assembly efficiency and post-production efficiency. Ease of maintenance.

It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such relationship between these entities. Actual relationship or sequence.

The above describes in detail the integrated wind power generator provided by the present application. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims (8)

1. An integrated wind power generator, characterized in that it includes a gear box and a generator coaxially connected with the output shaft of the gear box, and one end of the generator connected to the gear box is provided with a supporting end cover and a supporting bearing , the support end cover is used to seal and isolate the generator and the gearbox, the output shaft of the gearbox extends into the generator and is connected with the rotor of the generator, and the support bearing is used for The output shaft of the gearbox is supported.
2. The integrated wind power generator according to claim 1, wherein the generator comprises a stator base, a stator, a rotor, a rear end cover and a rear bearing, and the support end cover and the support bearing are arranged on the The front end of the generator and the rear end of the gearbox.
3. The integrated wind power generator according to claim 2, characterized in that, the output shaft of the gearbox and the rotor are fixedly connected through a generator adapter plate.
4. The integrated wind power generator according to claim 2, wherein a brake disc for braking the rotor is provided at the rear end cover.
5. The integrated wind power generator according to claim 4, wherein the rotor is fixedly connected to the rotor bracket and the bracket transition ring, and the brake disc is arranged on the outer periphery of the bracket transition ring.
6. The integrated wind power generator according to any one of claims 2-5, further comprising a generator cooler for cooling the generator.
7. The integrated wind power generator according to claim 6, wherein the generator cooler is an air-cooled cooler.
8. The integrated wind power generator according to claim 6, wherein the generator cooler is arranged on the periphery of the stator frame or the generator cooler is arranged on the rear end cover.

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