A wind turbine generator frame

Abstract

This application discloses a wind turbine generator frame, including a main frame body and a bearing housing body, as well as multiple sets of fasteners connecting the main frame body and the bearing housing body. The bearing housing body is vertically mounted on the main frame body, and the mounting surface of the two is located at the junction of the bottom of the bearing housing body and the end face of the main frame body. This frame connection structure effectively reduces the height of the bearing housing body mounting surface without altering the low-speed axis of the transmission system, increases the rigidity of the connection structure, reduces the weight of the main frame body and the bearing housing body, and lowers manufacturing costs.

Description

Technical Field

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

[0002] With the continuous maturation of wind turbine technology, and especially with the fierce competition in the wind power industry in recent years, minimizing the cost per kilowatt-hour has become a pursuit for wind farm owners and wind turbine manufacturers. While meeting the reliability requirements of wind turbines, continuous research into suitable forming methods and structural schemes for various structural components can improve the overall cost of wind turbines. Currently, the main structural components of wind turbines include the hub, frame, bearing housing, and main shaft, with forming processes encompassing casting, forging, and welding.

[0003] The main frame of a wind turbine generator serves as the load-bearing structure, supporting the transmission system and bearing and transmitting loads from the wind turbine. With the development of large-megawatt wind turbine generators, the swept area, applicable wind speed range, and loads are increasing, placing correspondingly higher demands on the rigidity of the main frame. Casting the main frame has become the mainstream forming solution for large-megawatt generators. Casting allows for thick walls, complex forming, high compressive strength, and high rigidity; its technology and performance can meet the diverse structural designs of current main frames.

[0004] Currently, the connection between the wind turbine main frame and the bearing housing generally adopts a transverse structure. The bearing housing connecting flanges are located on both sides of the top plate of the main frame, with the connection surface close to or even at the same height as the main shaft axis. This structure requires a relatively high bearing housing flange surface on the main frame, necessitating more metal material to raise the flange surface. In addition, the higher flange surface weakens the structural rigidity of the main frame, necessitating further material additions to increase frame rigidity, thus increasing costs.

[0005] Therefore, in view of the above-mentioned technical problems, how to provide a wind turbine generator frame structure that is reasonably designed, cost-effective, and can ensure connection strength is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a wind turbine generator frame that, in response to the current large-megawatt main frame and bearing housing, provides a wind turbine generator frame with a simple structure, reasonable design, high cost performance, and high connection strength.

[0007] To achieve the above objectives, this application provides a wind turbine generator frame, including a main frame body and a bearing housing body, as well as multiple sets of fasteners connecting the main frame body and the bearing housing body. The bearing housing body is vertically mounted on the main frame body, and the mounting surface of the two is located at the junction of the bottom of the bearing housing body and the end face of the main frame body.

[0008] Preferably, the main frame body is cast and hollow inside, and the main frame body includes:

[0009] A base plate is located on the bottom side of the main frame body, and the base plate is provided with a mounting part for installing the yaw system of the wind turbine generator set.

[0010] A middle plate is disposed on the base plate, and the middle plate is provided with a first flange surface for mounting the bearing housing body;

[0011] The top plate is located on the upper part of the middle plate and away from the first flange face. The top plate is provided with a second flange face for installing the elastic support seat of the wind turbine gearbox.

[0012] Preferably, the bottom of the bearing housing body is provided with an extension plate that matches and fits the first flange surface. The extension plate is provided with threaded holes corresponding to the circular holes of the first flange surface, and multiple sets of fasteners are fixed through the circular holes and the threaded holes.

[0013] Preferably, the fastener is a double-ended stud, which passes through the threaded hole and the round hole. One end of the double-ended stud is fixed in the threaded hole, and the other end is fitted with a washer and a nut, and is screwed on from the inside of the main frame body.

[0014] Preferably, the mounting portion includes a mounting surface for mounting the yaw caliper in the yaw system and a mounting hole for mounting the yaw drive in the yaw system.

[0015] The base plate has a central hole in the middle, and the mounting surface is the end face of the base plate away from the middle plate. The yaw calipers are distributed circumferentially along the central hole and are fixed to the mounting surface by bolts. There are multiple mounting holes that penetrate the base plate and are used to install the yaw drive.

[0016] Preferably, the front end of the main frame body is provided with a locking hole for locking the wind turbine, and the axis of the locking hole is parallel to the axis of the bearing housing body; the rear end of the main frame body is provided with a connecting flange for connecting to the rear frame of the wind turbine generator set.

[0017] Preferably, the main frame body is provided with multiple weight reduction holes.

[0018] Preferably, the main frame body is provided with multiple manholes for personnel or equipment to enter the cabin from the tower.

[0019] Preferably, the main frame body is provided with a pair of lifting lugs for hoisting and multiple bosses for installing the wind turbine generator set's auxiliary casting equipment.

[0020] Preferably, the rear end face of the main frame body is provided with a cable hole for the cable to pass through.

[0021] Compared to the aforementioned background technology, this application vertically assembles the main frame and bearing housing, with the connecting surface located at the bottom of the bearing housing. This reduces the height of the assembly surface without altering the low-speed axis of the transmission system. This increases structural rigidity, reduces the weight of the main frame and bearing housing, and lowers manufacturing costs.

[0022] Specifically, the wind turbine frame includes a main frame body and a bearing housing body, which are connected by multiple sets of fasteners. The bottom of the bearing housing body is located on the end face of the main frame body, so that the assembly surface of the two is also located at the junction of the two, thereby avoiding the problems of weak rigidity and high cost caused by excessively high assembly surfaces. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the wind turbine generator frame structure provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the front structure of the main frame of the wind turbine generator set provided in an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the side structure of the main frame of the wind turbine generator set provided in the embodiments of this application;

[0027] Figure 4 This is a top view of the main frame of the wind turbine generator set provided in the embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the mounting structure of the wind turbine generator frame provided in an embodiment of this application.

[0029] In the diagram: 1-Main frame body; 2-Bearing housing body; 3-Fastener; 10-Weight reduction hole; 11-Lock hole; 12-Connecting flange; 13-Top plate; 14-Middle plate; 15-Bottom plate; 16-Manhole; 17-Lifting lug; 18-Boss; 19-Cable hole; 131-Second flange face; 141-First flange face; 151-Mounting part; 1511-Mounting surface; 1512-Mounting hole. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] like Figures 1 to 5 As shown, this embodiment provides a wind turbine generator frame, which mainly connects the main frame body and the bearing housing body. Specifically, it includes the main frame body 1, the bearing housing body 2, and multiple sets of fasteners 3 connecting the two. Typically, the bearing housing body 2 is vertically mounted on the main frame body 1. However, as mentioned in the background art, when the bearing housing body 2 is vertically mounted, the mounting surface height is usually high, approaching or reaching the axis height of the bearing housing. Therefore, it is necessary to add metal material to the main frame body 1 to accommodate the mounting surface height of the bearing housing body 2. In this application, to reduce the mounting surface height of the bearing housing body 2, the bottom of the bearing housing body 2 contacts the end face of the main frame body 1 and is locked with fasteners 3, thereby positioning the mounting surface at the bottom of the bearing housing. This reduces the height of the connection surface between the main frame and the bearing housing without changing the low-speed axis of the transmission system, resulting in both the bearing housing and the main frame having good rigidity and light weight.

[0034] It should be noted that the main frame body 1 of this application is cast and hollow internally. It can be made of materials such as ductile iron and using a casting process, resulting in a simple structure, high strength, and light weight, while providing a good mounting platform for other components. (See attached instruction manual.) Figure 1 and 2 As shown, a locking hole 11 for locking the wind turbine is provided at the front end of the main frame body 1. The axis of the locking hole 11 can be parallel to the axis of the bearing housing body 2 to improve the fit between the locking hole 11 and the bearing housing body 2 and ensure the stability of the wind turbine. In addition, a connecting flange 12 for connecting to the rear frame of the wind turbine generator set is provided at the rear end of the main frame body 1.

[0035] In addition, the main frame body 1 also includes a base plate 15, a middle plate 14, and a top plate 13, as described in the instruction manual. Figures 2 to 4 As shown, the base plate 15 is located on the bottom side of the main frame body 1. To adapt to the setting method of the main frame body 1 in this application, the base plate 15 can be set as a disc-shaped structure. In order to reduce the overall weight of the main frame body 1, some holes can be opened on the base plate 15. A mounting part 151 for installing the yaw system of the wind turbine generator is provided on the base plate 15. The specific setting method of the yaw system can refer to the prior art and will not be described in detail here.

[0036] The middle plate 14 is mounted on the base plate 15 and the two are fixedly connected to form an integral structure, ensuring the stability of the main frame body 1. Figure 4 As shown, a first flange face 141 for mounting the bearing housing body 2 is provided on the middle plate 14. It should be noted that the first flange face 141 here is the aforementioned assembly surface. The first flange face 141 fits against the bottom of the bearing housing, thereby achieving a stable assembly between the two. Alternatively, the middle plate 14 can be configured in other structural forms to ensure a stable connection with the base plate 15, and it only needs to have a partially flat flange face on its upper end surface. No further restrictions are imposed here. Of course, the first flange face 141 can be connected to the upper end surface of the middle plate 14 via a flange, thus making the first flange face 141 flat; alternatively, the upper end surface of the middle plate 14 can be directly used as the flange face for a stable connection. The choice can be made according to actual needs.

[0037] Top plate 13 is located above middle plate 14 and on the side away from first flange face 141, specifically as follows: Figure 4 As shown, the top plate 13 is used to install the gearbox of the wind turbine generator set. Here, a second flange surface 131 is provided on the top plate 13 to provide an elastic support for the gearbox. As for the specific installation method of the gearbox, it will not be described here. Please refer to the prior art.

[0038] It should be noted that, in order to match the first flange face 141, an extension plate is provided at the bottom of the bearing housing body 2. The extension plate is fixedly installed with the bearing housing body 2, and its end face can perfectly fit the first flange face 141. The extension plate is provided to improve the connection stability between the main frame body 1 and the bearing housing body 2. Simultaneously, threaded holes corresponding to the circular holes on the first flange face 141 are provided on the extension plate. Multiple sets of fasteners 3 are fixed through the circular holes and threaded holes, thereby achieving a stable connection between the main frame body 1 and the bearing housing body 2.

[0039] Of course, reinforcing ribs can also be provided on the expansion plate, with the other end of the reinforcing ribs connected to the side wall of the bearing housing body 2, thereby improving the connection strength between the expansion plate and the bearing housing body 2; the methods for improving the connection strength between the two, including but not limited to the above-described embodiments, can be set according to the actual situation and all fall within the protection scope of this application.

[0040] Furthermore, the aforementioned fastener 3 can be a double-ended stud, which is used for fixing after the round hole and the threaded hole are aligned. Specifically, the double-ended stud passes through the threaded hole and the round hole, with one end fixed in the threaded hole and the other end fitted with a washer and nut, and then tightened from the inside of the main frame body 1. In addition, the wind turbine generator frame of this application fully considers the actual assembly space and ease of operation, and can effectively meet the actual assembly process and future maintenance needs.

[0041] As per the instruction manual Figure 5 As shown, the mounting section 151 includes a mounting surface 1511 for mounting yaw calipers in the yaw system and mounting holes 1512 for mounting yaw drives in the yaw system. A central hole is provided on the base plate 15. The mounting surface 1511 is the end face of the base plate 15 facing away from the middle plate 14. Multiple bolt holes are provided on the end face. Multiple yaw calipers are distributed circumferentially along the central hole and are fixed to the mounting surface 1511 by bolts. There are also multiple mounting holes 1512, which penetrate the base plate. Figure 5 As shown, the mounting hole 1512 can specifically be located on the outer periphery of the mounting surface 1511. Of course, the number of mounting holes 1512, mounting surface 1511, and corresponding screw holes can be adjusted according to the different loads of the wind turbine generator set to flexibly adapt to the number of yaw drives and yaw brakes, exhibiting good versatility. It should be noted that the arrangement of the mounting holes 1512, mounting surface 1511, and corresponding screw holes, including but not limited to the arrangement given in this embodiment, can be set according to actual application conditions, and will not be detailed here.

[0042] In addition, multiple weight-reduction holes 10 and manholes 16 are provided on the main frame body 1, specifically at the middle plate 14 or the top plate 13. Of course, the placement of the weight-reduction holes 10 and manholes 16 must not affect the overall structural rigidity of the main frame body 1. While achieving weight reduction and facilitating personnel or equipment access to the nacelle from the tower, the rigidity performance of the main frame body 1 must be ensured. There are various options for the specific locations of the weight-reduction holes 10 and manholes 16, including but not limited to the aforementioned top plate 13 or middle plate 14, and no further restrictions are imposed here.

[0043] Meanwhile, the main frame body 1 is provided with a pair of lifting lugs 17 for hoisting and multiple bosses 18 for installing auxiliary equipment of the wind turbine generator set. Specifically, these can be set on the top plate 13 or the middle plate 14, facilitating the hoisting of the main frame body 1 or the installation of other auxiliary equipment. In addition, a cable hole 19 is provided on the rear end face of the main frame body 1, through which the generator cable and other tail cables of the nacelle can enter the tower.

[0044] In summary, the connection structure between the main frame body 1 and the bearing housing body 2 in this application fully considers the load requirements of the unit during operation. The main frame structure also has excellent load-bearing performance, meeting the assembly requirements of the transmission system, yaw system, rear frame, and other structural components. The wind turbine generator frame of this application adopts a vertical installation method, giving both the main frame and bearing housing excellent rigidity. The cast main frame has a superior structure, is lightweight, and has low cost.

[0045] Of course, the structure and installation methods of other structural components that make up a wind turbine generator will not be described in detail here. Please refer to existing technologies for details.

[0046] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0047] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A wind turbine generator frame, characterized in that, It includes a main frame body and a bearing housing body, as well as multiple sets of fasteners connecting the main frame body and the bearing housing body. The bearing housing body is vertically assembled on the main frame body, and the assembly surface of the two is located at the junction of the bottom of the bearing housing body and the end face of the main frame body. The main frame body is cast and hollow inside, and the main frame body includes: A base plate is located on the bottom side of the main frame body, and the base plate is provided with a mounting part for installing the yaw system of the wind turbine generator set. A middle plate is disposed on the base plate, and the middle plate is provided with a first flange surface for mounting the bearing housing body; The top plate is located above the middle plate and away from the first flange face. The top plate is provided with a second flange face for installing the elastic support seat of the wind turbine gearbox. The bottom of the bearing housing body is provided with an extension plate that matches and fits the first flange surface. The extension plate is provided with threaded holes that correspond to the circular holes of the first flange surface. Multiple sets of fasteners are fixed through the circular holes and the threaded holes.

2. The wind turbine generator frame according to claim 1, characterized in that, The fastener is a double-ended stud, which passes through the threaded hole and the round hole. One end of the double-ended stud is fixed in the threaded hole, and the other end is fitted with a washer and a nut, and is screwed on from the inside of the main frame body.

3. The wind turbine generator frame according to claim 1, characterized in that, The mounting portion includes a mounting surface for mounting the yaw caliper in the yaw system, and a mounting hole for mounting the yaw drive in the yaw system. The base plate has a central hole in the middle, and the mounting surface is the end face of the base plate away from the middle plate. The yaw calipers are distributed circumferentially along the central hole and are fixed to the mounting surface by bolts. There are multiple mounting holes that penetrate the base plate and are used to install the yaw drive.

4. The wind turbine generator frame according to any one of claims 1-3, characterized in that, The front end of the main frame body is provided with a locking hole for locking the wind turbine, and the axis of the locking hole is parallel to the axis of the bearing housing body; the rear end of the main frame body is provided with a connecting flange for connecting to the rear frame of the wind turbine generator set.

5. The wind turbine generator frame according to claim 4, characterized in that, The main frame body is provided with multiple weight reduction holes.

6. The wind turbine generator frame according to claim 4, characterized in that, The main frame is equipped with multiple manholes for personnel or equipment to enter the cabin from the tower.

7. The wind turbine generator frame according to claim 4, characterized in that, The main frame body is provided with a pair of lifting lugs for hoisting and multiple bosses for installing the wind turbine generator set's auxiliary casting equipment.

8. The wind turbine generator frame according to claim 4, characterized in that, The rear end face of the main frame body is provided with a cable hole for the cable to pass through.

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