A rear end cover structure of a semi-direct drive wind turbine generator

Abstract

The application relates to a rear end cover structure of a semi-direct-drive wind power generator, which comprises an end cover body and a wind channel sealing ring vertically arranged at the middle position of the end cover body, disc wheel device interfaces symmetrically arranged on the circumference of the end face of the end cover body, brake interfaces symmetrically arranged between the oppositely arranged disc wheel device interfaces and inside the wind channel sealing ring, two sides of one of the brake interfaces and on the end cover body symmetrically arranged with high-voltage wiring box interfaces, and two sides of the other brake interface and on the end cover body symmetrically arranged with auxiliary wiring box interfaces. The disc wheel device interface is a semicircular ring, and the opening end faces the center of the end cover body. The rear end cover structure greatly reduces the occupied space and axial space size of the generator parts, the overall layout of the generator structure is more compact, and the problems of realizing the integration of multiple functions on the end cover, the lack of brake space, the daily maintenance of parts and the like are solved.

Description

Technical Field

[0001] This invention belongs to the field of generator end cover technology and relates to a rear end cover structure for a semi-direct drive wind turbine. Background Technology

[0002] Wind power is a crucial component of clean energy and a major force in promoting carbon neutrality in the energy system and society as a whole. High-quality development of the wind power industry is a vital strategic choice for achieving dual-carbon goals. In recent years, to reduce the cost per kilowatt-hour, the power output of individual wind turbine units has been increasing. To meet the cost reduction demands of wind power, a semi-direct-drive permanent magnet wind turbine technology route has been developed. As the power output of the units increases, the generator size also increases accordingly, severely restricting the space layout within the nacelle. This leads to increased difficulty in the layout of the rear-end components of the motor, placing higher demands on the spatial arrangement, mechanical strength, and safety protection of the rear end cover. The existing semi-direct drive permanent magnet wind turbine generators usually have the following problems: (1) There are too many components to be arranged on the rear end cover, which cannot meet the space requirements and there is a risk that the function cannot be realized; (2) The motor braking torque is too large, and the axial position of the braking device is too far from the brake disc, which cannot meet the braking requirements; (3) The rear end cover needs to form a wind passage seal with the motor rotor to ensure the motor cooling effect. Due to the excessive axial distance between the rear end cover and the rotor, the traditional wind passage sealing structure cannot meet the motor operation requirements in terms of weight and strength after being connected to the rear end cover; (4) During the operation of the motor, the rotating parts arranged outside the rear end cover need to be protected, and the carbon brushes, brakes, auxiliary junction boxes and other components need daily maintenance. A split protective mesh plate needs to be designed to solve the protection problem and take into account the daily maintenance of the components. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and propose a multi-functional frame-type rear end cover structure for a semi-direct drive wind turbine. By highly integrating the functions of key generator components such as the generator turning device, brake, grounding device, toner collection device, speed sensor, vibration sensor, high-voltage junction box, auxiliary junction box, and duct sealing ring onto the rear end cover, and designing it as a frame-type welded structure while meeting its own strength requirements, the weight of the components is minimized, greatly reducing the space occupied by the generator components and the axial space dimension, resulting in a more compact overall layout of the generator structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rear end cover structure for a semi-direct drive wind turbine is characterized in that the rear end cover structure includes an end cover body and a duct sealing ring vertically disposed in the middle therebetween. Symmetrical turning gear interfaces are arranged on the circumference of the end face of the end cover body. Brake interfaces are symmetrically arranged between the opposing turning gear interfaces and located inside the duct sealing ring. A high-voltage junction box interface is symmetrically arranged on both sides of one of the brake interfaces and on the end cover body. An auxiliary junction box interface is symmetrically arranged on both sides of the other brake interface and on the end cover body. The turning gear interface is a semi-circular ring with one opening facing the center of the end cover body.

[0006] Furthermore, a speed sensor interface is provided on the edge of the end cap body near the center position, and a vibration sensor interface is also provided on the end cap body.

[0007] Furthermore, grounding device interfaces are provided in the diameter direction of the turning device interface and at the intersection of the end cover body and the air duct sealing ring.

[0008] Furthermore, both ends of the semicircular ring are provided with toner collection device interfaces located at the intersection of the end cap body and the air duct sealing ring.

[0009] Furthermore, the brake interface is fixed on a recessed platform, which is located at the junction of the air duct sealing ring and the end cover body.

[0010] Furthermore, the brake interface is connected to a brake via a recessed design.

[0011] Furthermore, a reinforcing rib is provided on the outer periphery of the end cap body, and the bottom edge of the reinforcing rib is fixed to the end cap body.

[0012] Furthermore, a cover plate is provided on the bottom surface of the end cap body. The cover plate is circular and is located between the symmetrical turning device interfaces.

[0013] Furthermore, the cover plate includes a fixing frame and four fan-shaped mesh plates located within the fixing frame. The mesh plates divide the fixing frame into four equal parts, and adjacent mesh plates are fastened together by fixing strips.

[0014] Furthermore, the end cap body and the air duct sealing ring are welded together to form an integral structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A rear end cover structure for a semi-direct drive wind turbine integrates the functions of key generator components such as the generator turning gear, brake, grounding device, toner collection device, speed sensor, vibration sensor, high-voltage junction box, auxiliary junction box, and duct sealing ring onto the rear end cover. While ensuring its own strength, it is designed as a frame-type welded structure, minimizing the weight of the components and significantly reducing the space occupied by the generator components and their axial dimensions. The overall layout of the generator structure is more compact, solving problems such as insufficient space for multiple functions integrated into the end cover, insufficient duct sealing and strength, protection of rotating parts, and routine maintenance of components.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the rear end cover structure of a semi-direct drive wind turbine according to the present invention;

[0021] Figure 2 This is a schematic diagram of a semi-direct drive wind turbine generator with a brake mounted on the rear end cover according to the present invention.

[0022] Figure 3 This is a perspective view of the rear end cover structure of a semi-direct drive wind turbine according to the present invention;

[0023] Figure 4 This is a schematic diagram of the rear cover plate structure of a semi-direct drive wind turbine according to the present invention.

[0024] The components are: 1. Turning gear interface; 2. Brake interface; 3. Grounding device interface; 4. Carbon powder collection device interface; 5. Speed ​​sensor interface; 6. Vibration sensor interface; 7. High-voltage junction box interface; 8. Auxiliary junction box interface; 9. Brake; 10. End cover body; 11. Air duct sealing ring; 12. Reinforcing rib; 13. Mesh plate. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses consistent with some aspects of the invention as detailed in the appended claims.

[0026] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Example

[0028] like Figure 1-4 As shown, a rear end cover structure for a semi-direct drive wind turbine includes an end cover body 10 and a duct sealing ring 11 vertically positioned in the middle of the end cover. Symmetrically arranged on the circumference of the end face of the end cover body 10 are turning gear interfaces 1. Symmetrically arranged between the opposing turning gear interfaces 1 and inside the duct sealing ring 11 are brake interfaces 2. On both sides of one brake interface 2 and on the end cover body 10 are symmetrically arranged high-voltage junction box interfaces 7, and on both sides of the other brake interface 2 and on the end cover body 10 are symmetrically arranged auxiliary junction box interfaces 8. The turning gear interface 1 is a semi-circular ring with one opening facing the center of the end cover body 10. A speed sensor interface 5 is located near the center edge of the end cover body 10, and a vibration sensor interface 6 is also provided on the end cover body 10. Grounding device interfaces 3 are provided along the diameter of the turning gear interfaces 1 at the intersection of the end cover body 10 and the duct sealing ring 11.

[0029] Both ends of the semicircular ring, at the intersection of the end cap body 10 and the air duct sealing ring 11, are provided with toner collection device interfaces 4.

[0030] The brake interface 2 is fixed on the recessed platform, which is located at the junction of the air duct sealing ring 11 and the end cover body 10.

[0031] Brake interface 2 is connected to brake 9 via a recessed design.

[0032] Eight reinforcing ribs 12 are welded to the outer periphery of the end cap body 10 to meet the overall strength requirements. The bottom edge of the reinforcing ribs 12 is fixed to the end cap body 10. The end cap body 10 and the air duct sealing ring 11 are welded together to form an integral structure. The air duct sealing ring 11 adopts a thin-walled structure, which reduces the weight of the rear end cap structure.

[0033] A circular cover plate is provided on the bottom surface of the end cover body 10, located between the symmetrical turning device interfaces 1. The cover plate includes a fixing frame and four fan-shaped mesh plates 13 located within the fixing frame. The mesh plates 13 divide the fixing frame into four equal parts, and adjacent mesh plates 13 are fastened together by fixing strips. The mesh plates 13 provide protection and facilitate daily observation of the operating status, disassembly, inspection, and maintenance by the user.

[0034] The rear end cover structure proposed in this application maximizes the use of space in the end cover, accommodating interfaces for key generator components such as the turning gear, brake, grounding device, toner collection device, speed sensor, vibration sensor, high-voltage junction box, auxiliary junction box, and duct sealing ring, thus integrating multiple functions. Through finite element analysis, the end cover is partially recessed and reinforced to accommodate the brake, meeting user torque and its own strength requirements while saving axial space and solving the problem of insufficient brake space. The design features a frame-type welded structure, with the duct sealing ring welded integrally to the end cover body. While ensuring its own strength, the duct sealing ring adopts a thin-walled + ribbed structure to minimize its own weight and meet sealing requirements. The design addresses the protection of rotating parts and the daily maintenance of components. The protective cover plate installed on the end cover adopts a split structure, consisting of four mesh plates, which not only provides protection but also facilitates daily observation of the operating status and disassembly for inspection and maintenance.

[0035] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0036] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A rear end cover structure for a semi-direct drive wind turbine, characterized in that, The rear end cover structure includes an end cover body (10) and a duct sealing ring (11) vertically arranged in the middle position. A turning device interface (1) is symmetrically arranged on the circumference of the end face of the end cover body (10). A brake interface (2) is symmetrically arranged between the symmetrically arranged turning device interfaces (1) and inside the duct sealing ring (11). A high-voltage junction box interface (7) is symmetrically arranged on both sides of one of the brake interfaces (2) and on the end cover body (10). An auxiliary junction box interface (8) is symmetrically arranged on both sides of the other brake interface (2) and on the end cover body (10). The turning device interface (1) is a semi-circular ring, and one end of the opening faces the center of the end cover body (10). Grounding device interfaces (3) are provided in the diameter direction of the turning device interface (1) and at the intersection of the end cover body (10) and the air duct sealing ring (11); carbon powder collection device interfaces (4) are provided at both ends of the semi-circular ring and at the intersection of the end cover body (10) and the air duct sealing ring (11).

2. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, A speed sensor interface (5) is provided on the edge near the center of the end cap body (10), and a vibration sensor interface (6) is also provided on the end cap body (10).

3. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, The brake interface (2) is fixed on the recessed platform, which is located at the junction of the air duct sealing ring (11) and the end cover body (10).

4. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, The brake interface (2) is connected to the brake (9) in a recessed manner.

5. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, A reinforcing rib (12) is provided on the outer periphery of the end cap body (10), and the bottom edge of the reinforcing rib (12) is fixed on the end cap body (10).

6. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, The bottom surface of the end cap body (10) is provided with a cover plate, which is circular and located between the symmetrical turning device interfaces (1).

7. The rear end cover structure of a semi-direct drive wind turbine according to claim 6, characterized in that, The cover plate includes a fixing frame and four fan-shaped mesh plates (13) located inside the fixing frame. The mesh plates (13) divide the fixing frame into four equal parts, and adjacent mesh plates (13) are fastened together by fixing strips.

8. The rear end cover structure of a semi-direct drive wind turbine according to claim 1, characterized in that, The end cap body (10) and the air duct sealing ring (11) are welded together to form an integral structure.

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