Integrated main frame of wind turbine generator system

Abstract

The application discloses a wind turbine integrated mainframe, which comprises an upper half, a lower half and a rear half, the upper half is connected with a nacelle, the lower half is connected with a tower, the upper half and the rear half of the mainframe are used as general parts, the lower half of the mainframe is used as a modular part, the modular part is provided with a first interface and a second interface, the first interface is used for mounting a yaw bearing of a rolling yaw system, and the second interface is used for mounting a yaw bearing of a sliding yaw system, so that the mainframe can be compatible with the rolling and sliding yaw systems for installation, the applicability of the mainframe is improved, and the mold cost of the mainframe is saved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator technology, and more specifically to an integrated main frame for a wind turbine generator. Background Technology

[0002] The main frame, as the primary supporting component in the nacelle of a wind turbine generator, has an upper section that mainly supports the bearing housing and gearbox, a rear section that mainly supports the generator base, and a lower section that mainly connects to the yaw system, thus integrating the nacelle into a unified whole. The yaw system is an indispensable part of the wind turbine generator; its function is to quickly and smoothly align with the wind direction when the wind speed vector changes, so that the wind turbine can obtain maximum wind energy.

[0003] Currently, there are two main types of yaw systems for wind turbine generators: a rolling yaw system using a four-point contact ball bearing, hydraulic yaw brake, and yaw brake disc; and a sliding yaw system using a yaw gear ring, mechanical yaw brake, and friction pads. Because the interfaces between these two types of yaw systems and the main frame are inconsistent, existing main frames do not employ an integrated design and only have one type of interface, making it impossible to achieve compatibility between the rolling and sliding yaw systems. Therefore, different main frame molds are required for manufacturing the main frame, resulting in higher costs and poorer applicability of the generator. Furthermore, due to the different structural forms of the two yaw systems, current main frames cannot accommodate both yaw system options for the same generator, leading to increased development cycles and costs. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides an integrated main frame for wind turbine generator sets, which is compatible with both rolling and sliding yaw systems, thereby improving the applicability of the main frame.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect of the invention, an integrated main frame for a wind turbine generator is provided, comprising an upper part, a lower part, and a rear part. The upper part is connected to the nacelle, and the lower part is connected to the tower. The upper and rear parts of the main frame serve as general-purpose parts, while the lower part serves as a modular part. The modular part is provided with a first interface and a second interface. The first interface is used to install a yaw bearing for a rolling yaw system, and the second interface is used to install a yaw bearing for a sliding yaw system, so that the main frame can be compatible with both rolling and sliding yaw system installations.

[0007] In some embodiments of the present invention, a circular channel hole is provided at the center of the modular part, and the first interface consists of a plurality of bolt holes evenly distributed along the circular channel hole on the modular part.

[0008] In some embodiments of the present invention, the rolling yaw system includes a yaw bearing, a yaw brake disc, a first yaw drive, and a hydraulic yaw brake, wherein the inner ring of the yaw bearing is bolted to a modular part on the main frame, and the outer ring of the yaw bearing and the yaw brake disc are bolted to the top flange of the tower.

[0009] In some embodiments of the present invention, the first yaw drive is bolted to a modular part of the main frame, and the small teeth of the yaw drive mesh with the large teeth of the outer ring of the yaw bearing.

[0010] In some embodiments of the present invention, the second interface is a circumferential mounting groove formed on the modular part, the circumferential mounting groove being used to install the yaw bearing of the sliding yaw system.

[0011] In some embodiments of the present invention, the sliding yaw system includes a yaw gear ring, a second yaw drive, a mechanical yaw brake, and a friction pad; wherein the yaw gear ring is bolted to the top flange of the tower, and the yaw gear ring is in contact with the modular part of the main frame through the friction pad.

[0012] In some embodiments of the present invention, the friction pad is disposed in a circular mounting groove of the yaw system mounting plate, and the mechanical yaw brake contacts the inner diameter surface and lower end surface of the yaw gear ring through the friction pad.

[0013] In some embodiments of the present invention, the second yaw drive is bolted to a modular part of the main frame, and the pinion of the yaw drive meshes with the large pinion of the yaw gear ring.

[0014] In some embodiments of the present invention, the modular portion is further provided with yaw drive mounting holes and yaw brake mounting holes.

[0015] In some embodiments of the present invention, the yaw drive and the yaw brake are both mounted in the yaw drive mounting hole and the yaw brake mounting hole by bolts.

[0016] One or more technical solutions of the present invention have the following beneficial effects:

[0017] The integrated mainframe provided by this invention includes a general part and a modular part. The modular part is provided with a first interface and a second interface. The first interface is used to install the yaw bearing of the rolling yaw system, and the second interface is used to install the yaw bearing of the sliding yaw system, so that it can be adapted to two different yaw systems at the same time.

[0018] Compared to traditional mainframes, the integrated mainframe provided by this invention features a universal main body and a modular interface with the yaw system. This integrated design allows the mainframe to be compatible with both rolling and sliding yaw systems, saving on mold costs and improving the unit's adaptability, thereby shortening the unit development cycle and reducing development costs. Furthermore, the separation between the universal and modular parts of the mainframe is at the cross-section where the friction pad is located; this planar position facilitates mold processing and forming, further reducing mold costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main frame of the present invention. In the figure, I is the upper half of the main frame, II is the rear half of the main frame, and III is the lower half of the main frame.

[0020] Figure 2 This is a bottom view of the main frame of the present invention;

[0021] Figure 3 for Figure 1 A magnified view of a portion of point A in the diagram; the solid line represents the first interface, and the dashed line represents the second interface.

[0022] Figure 4 A bottom view of the main frame of the present invention after the rolling yaw system has been installed;

[0023] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0024] Figure 6 A bottom view of the main frame of the present invention after the sliding yaw system has been installed;

[0025] Figure 7 for Figure 6 The cross-sectional view at point BB.

[0026] In the diagram: 1. First interface; 2. Second interface; 3. Rolling yaw system; 301. First yaw bearing; 302. Yaw brake disc; 303. First yaw drive; 304. Hydraulic yaw brake; 305. First connecting bolt; 306. First connecting nut; 307. Second connecting bolt; 308. Second connecting nut; 4. Sliding yaw system; 401. Yaw gear ring; 402. Second yaw drive; 403. Mechanical yaw brake; 404. Friction pad; 405. Third connecting bolt; 406. Third connecting nut; 5. Yaw drive mounting hole; 6. Yaw brake mounting hole. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] In a typical embodiment of the present invention, an integrated main frame for a wind turbine generator is proposed, such as... Figure 1 As shown, the main frame is divided into an upper part I, a rear part II, and a lower part III. The upper part I connects to the nacelle and supports the bearing housing, gearbox, and generator base. The lower part III connects to the tower. The upper part I and the rear part II of the main frame are general-purpose parts, while the lower part III is a modular part. The modular part is provided with a first interface 1 and a second interface 2. The first interface 1 is used to install the yaw bearing of the rolling yaw system, and the second interface 2 is used to install the yaw bearing of the sliding yaw system, so that the main frame can be compatible with the installation of both rolling and sliding yaw systems.

[0030] like Figure 2 and Figure 3 As shown, a circular channel hole is provided at the center of the modular part. The first interface 1 consists of multiple bolt holes evenly distributed along the circular channel hole on the modular part. The second interface 2 is a circumferential mounting groove opened on the modular part. The circumferential mounting groove is used to install the yaw bearing of the sliding yaw system. The first interface and the second interface correspond to different yaw system forms. The two interfaces can be switched arbitrarily according to the form of the yaw system to meet the use of the two yaw systems.

[0031] The modular part is also provided with a yaw drive mounting hole 5 and a yaw brake mounting hole 6. The yaw drive and the yaw brake are both installed in the yaw drive mounting hole and the yaw brake mounting hole by bolts.

[0032] like Figure 4 and Figure 5As shown, the rolling yaw system 3 includes a first yaw bearing 301, a yaw brake disc 302, a first yaw drive 303, and a hydraulic yaw brake 304. The inner ring of the first yaw bearing 303 is bolted to a modular portion on the main frame, and the outer ring of the first yaw bearing 303 and the yaw brake disc 302 are bolted to the tower top flange. The first yaw drive 303 is connected to the modular portion of the main frame via a first connecting bolt 305 and a first connecting nut 306, with the small teeth of the first yaw drive 303 meshing with the large teeth of the outer ring of the yaw bearing. The hydraulic yaw brake 304 is connected to the modular portion of the main frame via a second connecting bolt 307 and a second connecting nut 308.

[0033] During yaw, the hydraulic yaw brake 304 depressurizes and releases the yaw brake disc 302. Driven by the motor of the first yaw drive 303, the nacelle rotates along the outer ring of the first yaw bearing 301 to achieve yaw. During yaw braking, the hydraulic yaw brake 304 depressurizes and holds the yaw brake disc 302 to fix the position of the nacelle.

[0034] like Figure 6 and Figure 7 As shown, the sliding yaw system includes a yaw gear ring 401, a second yaw drive 402, a mechanical yaw brake 403, and a friction pad 404. The yaw gear ring 401 is bolted to the top flange of the tower and not bolted to the main frame. The yaw gear ring 401 contacts the modular part of the main frame via the friction pad 404, which is disposed in a circular mounting groove on the yaw system mounting plate. The mounting groove can be rectangular or other shapes, and the friction pad 404 and the mounting groove have a clearance fit. The second yaw drive 402 is bolted to the modular part of the main frame, and the small teeth of the yaw drive mesh with the large teeth of the yaw gear ring. The mechanical yaw brake 403 is connected to the modular part of the main frame via a third connecting bolt 405 and a third connecting nut 406. The mechanical yaw brake 403 contacts the inner diameter surface and lower end surface of the yaw gear ring 401 via the friction pad.

[0035] During yaw, the nacelle rotates along the large tooth of the yaw gear ring driven by the yaw drive motor to achieve yaw. During yaw braking, the electromagnetic brake of the yaw drive locks the nacelle position to fix it.

[0036] Modular Components: The modular components include two different connection interfaces: a rolling yaw system and a sliding yaw system. A rolling yaw system typically consists of a yaw bearing, a hydraulic yaw brake, a yaw brake disc, a yaw drive, and connecting bolts. A sliding yaw system typically consists of a yaw gear ring, a mechanical yaw brake, friction pads, a yaw drive, and connecting bolts. The connection between the rolling yaw system and the main frame is as follows: the inner ring of the yaw bearing is bolted to the main frame; the outer ring of the yaw bearing and the yaw brake disc are bolted to the tower top flange; the hydraulic yaw brake is bolted to the main frame; and the yaw drive is bolted to the main frame. The small teeth of the yaw drive mesh with the large teeth of the outer ring of the yaw bearing. During yaw, the hydraulic yaw brake depressurizes, releasing the yaw brake disc. Driven by the yaw drive motor, the nacelle rotates along the large teeth of the outer ring of the yaw bearing to achieve yaw. During yaw braking, the hydraulic yaw brake reduces... The yaw brake disc is held in place by pressure, thus fixing the nacelle position. The sliding yaw system is connected to the main frame as follows: the yaw gear ring is bolted to the top flange of the tower and is not bolted to the main frame. The yaw gear ring and the main frame are in contact through friction pads. The mechanical yaw brake is bolted to the main frame and is in contact with the inner diameter surface and lower end face of the yaw gear ring through friction pads. The yaw drive is bolted to the main frame. The small teeth of the yaw drive mesh with the large teeth of the yaw gear ring. During yaw, the nacelle rotates along the large teeth of the yaw gear ring under the drive of the yaw drive motor to achieve yaw. During yaw braking, the electromagnetic brake of the yaw drive locks the nacelle position. The integrated main frame design can accommodate both rolling and sliding yaw systems, saving on main frame mold costs and improving the unit's adaptability, thereby shortening the unit's development cycle and reducing development costs.

[0037] The integrated main frame of the wind turbine generator provided in this embodiment can be adapted to both rolling yaw systems and sliding yaw systems. Compared with traditional main frames, its main body is universal, and the interface with the yaw system is modular. By designing the main frame as an integrated unit, the main frame on the same platform can be compatible with both rolling and sliding yaw systems. This saves on the cost of main frame molds and improves the adaptability of the unit, thereby shortening the unit development cycle and reducing the unit development cost.

[0038] The integrated main frame of the wind turbine generator provided in this embodiment can be divided into general parts or modular parts according to actual product needs, but it still meets the integrated design of the main frame and can be compatible with two different types of yaw systems: rolling and sliding.

[0039] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An integrated main frame for a wind turbine generator set, comprising an upper part, a lower part, and a rear part, wherein the upper part is connected to the nacelle, and the lower part is connected to the tower, characterized in that, The upper and rear halves of the main frame are general-purpose parts, while the lower half of the main frame is a modular part. The modular part is provided with a first interface and a second interface. The first interface is used to install the yaw bearing of the rolling yaw system, and the second interface is used to install the yaw bearing of the sliding yaw system, so that the main frame can be compatible with the installation of two different yaw systems, rolling and sliding. A circular channel hole is provided at the center of the modular part; the first interface is a plurality of bolt holes evenly distributed along the circular channel hole on the modular part; the second interface is a circumferential mounting groove formed on the modular part. The separation point between the general-purpose part and the modular part is the cross-sectional position of the friction pad, which is a plane; The sliding yaw system includes a yaw gear ring, a second yaw drive, a mechanical yaw brake, and a friction pad; the yaw gear ring is bolted to the top flange of the tower, and the yaw gear ring is in contact with the modular part of the main frame through the friction pad, and is not bolted to the main frame. The rolling yaw system includes a yaw bearing, a yaw brake disc, a first yaw drive, and a hydraulic yaw brake. The inner ring of the yaw bearing is bolted to a modular part on the main frame, and the outer ring of the yaw bearing and the yaw brake disc are bolted to the top flange of the tower. The first yaw drive is bolted to the modular part of the main frame, and the small teeth of the yaw drive mesh with the large teeth of the outer ring of the yaw bearing; The friction pad is set in the circular mounting groove of the yaw system mounting plate, and the mechanical yaw brake contacts the inner diameter surface and lower end surface of the yaw gear ring through the friction pad. The second yaw drive is bolted to the modular part of the main frame, and the small tooth of the yaw drive meshes with the large tooth of the yaw gear ring.

2. The integrated main frame of the wind turbine generator as described in claim 1, characterized in that, The circumferential mounting groove is used to install the yaw bearing of the sliding yaw system.

3. The integrated main frame of the wind turbine generator as described in claim 1, characterized in that, The modular part is also provided with yaw drive mounting holes and yaw brake mounting holes.

4. The integrated main frame of the wind turbine generator as described in claim 3, characterized in that, Both the yaw drive and the yaw brake are bolted into the yaw drive mounting holes and the yaw brake mounting holes.

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