A wind turbine main shaft mounting structure

Abstract

The utility model provides a kind of wind generator main shaft installation structure, the wind generator main shaft installation structure includes mounting bracket, bearing seat, positioning key and fixed rib. The utility model is provided with mounting bracket, two bearing seats are installed on the mounting bracket along the axial direction of main shaft with interval, positioning key is arranged between two bearing seats and mounting bracket, the position of two bearing seats on mounting bracket can be positioned by positioning key. And fixed rib is inserted between two bearing seats. When disassembling and maintaining in later period, main shaft and bearing seat can be disassembled from mounting bracket, after ground repair is completed, main shaft and bearing seat are installed to mounting bracket again, by the positioning of positioning key and fixed rib, the installation and debugging of bearing seat position in auxiliary installation process can be assisted, the relative position of main shaft and wind blade rotating shaft and generator input shaft is conveniently aligned, to facilitate the installation of main shaft, reduce operation difficulty, improve repair efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, specifically relating to a wind turbine main shaft mounting structure. Background Technology

[0002] The main shaft of a small wind turbine is used to connect the fan blades and the generator. The main shaft is typically mounted on the wind turbine using bearing housings. To ensure stability during rotation, bearing housings are installed at both ends of the main shaft, and both ends are rotatably mounted on these housings. The accuracy of the main shaft's installation position affects the lifespan of both the main shaft and the bearings. Therefore, during installation, the position of the bearing housings needs to be adjusted to ensure the stability of the main shaft during rotation.

[0003] Designing two bearing housings as a single unit increases the stability of their relative positions, but it also increases the overall weight of the equipment. Therefore, most wind turbine generators use two separate bearing housings. However, when replacing bearings or disassembling and reinstalling the main shaft for later maintenance, the two bearing housings need to be reinstalled, requiring readjustment of their positions. This complicates the maintenance process and reduces its efficiency. Utility Model Content

[0004] This utility model provides a wind turbine main shaft mounting structure, which aims to solve the problems of complex operation and low maintenance efficiency of the main shaft and bearings of wind turbines in the later maintenance process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a wind turbine main shaft mounting structure, comprising:

[0006] Mounting rack;

[0007] Two bearing seats are provided, which are spaced apart and detachably mounted on the mounting bracket. The two ends of the spindle are rotatably mounted on the two bearing seats respectively, and the axial direction of the spindle is defined as the first direction.

[0008] A positioning key is installed between the bearing housing and the mounting bracket to prevent the two bearing housings from shifting along a first direction on the mounting bracket.

[0009] A fixing rib is inserted at both ends between the two bearing seats to fix the relative position between the two bearing seats.

[0010] In one possible implementation, the two ends of the fixing rib are respectively inserted into the two bearing seats, and a positioning pin is provided between the fixing rib and the bearing seat.

[0011] In one possible implementation, the fixing ribs are installed on the top side and both sides of the bearing housing.

[0012] In one possible implementation, a support rod is also connected between the two bearing housings, and both ends of the support rod are provided with fixing components for fixing to the bearing housings.

[0013] In one possible implementation, the fixing assembly includes two fasteners threaded to the same end of the support rod, the two fasteners abutting against the two sides of the bearing housing along a first direction.

[0014] In one possible implementation, two longitudinal beams are fixedly installed on the mounting bracket, with the two longitudinal beams spaced apart and a crossbeam fixedly connected between them. The positioning key is installed between the longitudinal beams and the crossbeam.

[0015] In one possible implementation, both the longitudinal beam and the transverse beam are provided with mounting holes for fixing the bearing housing.

[0016] In one possible implementation, the crossbeam includes vertical ribs with a width along the vertical direction, the vertical ribs extending into the interior of the longitudinal beam, and the positioning key abutting against the vertical ribs.

[0017] In one possible implementation, a gearbox for connection to the main shaft is fixedly mounted on one of the bearing housings, and a universal coupling is connected between the output shaft of the gearbox and the generator.

[0018] In one possible implementation, the ends of the input shaft and the main shaft of the gearbox are coaxially provided with positioning holes, and a shaft pin is slidably disposed inside the positioning holes.

[0019] The solution shown in this application, compared with the prior art, utilizes a mounting frame on which the wind turbine blades are rotatably mounted. The generator is fixedly mounted on the mounting frame, and a main shaft drive connects the generator and the blades. Two bearing seats are spaced apart along the axis of the main shaft on the mounting frame, and each bearing seat has a positioning key between it and the mounting frame. The positioning key allows for positioning of the two bearing seats on the mounting frame. Multiple fixing ribs are inserted between the two bearing seats, spaced apart circumferentially along the main shaft. This allows for positioning of the two bearing seats relative to each other in a direction perpendicular to the first direction. The relative mounting positions of the two bearing seats can be determined by the fixing ribs and positioning keys. During later disassembly and maintenance, the main shaft and bearing housing can be removed from the mounting frame. After the ground maintenance is completed, the main shaft and bearing housing can be installed back onto the mounting frame. The positioning key and fixing ribs can assist in the installation and adjustment of the bearing housing position during the installation process, making it easier to align the relative position of the main shaft with the fan blade rotation shaft and the generator input shaft. This facilitates the installation of the main shaft, reduces the difficulty of operation, and improves maintenance efficiency. Attached Figure Description

[0020] Figure 1 A schematic diagram of the wind turbine main shaft mounting structure provided in this embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of the mounting bracket provided in an embodiment of this utility model;

[0022] Figure 3 for Figure 1 Enlarged view of part A in the middle;

[0023] Figure 4 A schematic diagram of the connection structure between the gearbox and the main shaft provided in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Mounting bracket; 11. Longitudinal beam; 12. Crossbeam; 121. Vertical rib; 2. Bearing housing; 3. Locating key; 4. Fixing rib; 5. Locating pin; 6. Support rod; 7. Fastener; 8. Gearbox; 9. Generator; 91. Universal coupling; 10. Main shaft. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Please refer to the following: Figures 1 to 4The wind turbine main shaft mounting structure provided by this utility model is now described. The wind turbine main shaft mounting structure includes a mounting frame 1, bearing seats 2, positioning components, and fixing ribs 4. There are two bearing seats 2, spaced apart and detachably mounted on the mounting frame 1. The two ends of the main shaft 10 are rotatably mounted on the two bearing seats 2, and the axial direction of the main shaft 10 is defined as the first direction. Positioning keys 3 are installed between the bearing seats 2 and the mounting frame 1 to prevent displacement of the two bearing seats 2 along the first direction on the mounting frame 1. The fixing ribs 4 are inserted at both ends between the two bearing seats 2 to fix the relative position between the two bearing seats 2.

[0028] The wind turbine main shaft mounting structure provided in this embodiment, compared with the prior art, features a mounting frame 1 on which the blades of the wind turbine 9 are rotatably mounted. The generator 9 is fixedly mounted on the mounting frame 1, and a main shaft 10 drives the connection between the generator 9 and the blades. Two bearing seats 2 are spaced apart on the mounting frame 1 along the axial direction of the main shaft 10. Positioning keys 3 are provided between each bearing seat 2 and the mounting frame 1, allowing the bearing seats 2 to be positioned on the mounting frame 1. Multiple fixing ribs 4 are inserted between the two bearing seats 2, spaced apart circumferentially along the main shaft 10. This allows for positioning of the two bearing seats 2 relative to each other in a direction perpendicular to the first direction. The relative mounting positions of the two bearing seats 2 are determined by the fixing ribs 4 and the positioning keys 3. During later disassembly and maintenance, the main shaft 10 and bearing housing 2 can be removed from the mounting bracket 1. After the ground maintenance is completed, the main shaft 10 and bearing housing 2 can be installed back onto the mounting bracket 1. The positioning key 3 and fixing rib 4 can assist in the installation and adjustment of the bearing housing 2 during the installation process, making it easier to align the relative position of the main shaft 10 with the fan blade rotation shaft and the generator 9 input shaft. This facilitates the installation of the main shaft 10, reduces the difficulty of operation, and improves maintenance efficiency.

[0029] Specifically, in this embodiment, mounting holes for mounting the fixing ribs 4 are provided on both bearing seats 2, and the outer side of the fixing ribs 4 slides in fit with the inner wall of the mounting holes.

[0030] In some embodiments, the aforementioned fixing rib 4 can be adopted as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3The two ends of the fixing rib 4 are respectively inserted into the two bearing seats 2, and a positioning pin 5 is provided between the fixing rib 4 and the bearing seat 2. The bearing seat 2 has mounting holes for installing the fixing rib 4, and the fixing rib 4 is inserted into the mounting holes. Pin holes for installing the positioning pin 5 are provided on the side wall of the mounting holes and on the fixing rib 4. After the bearing seat 2 and the spindle 10 are initially installed onto the mounting bracket 1, the relative position of the fixing rib 4 and the bearing seat 2 is fixed. The pin holes are machined using a machine tool, and finally the positioning pin 5 is installed into the pin holes, thereby achieving the positioning of the fixing rib 4. During subsequent maintenance and reassembly, the relative position between the fixing rib 4 and the bearing seat 2 can be positioned using the positioning pin 5.

[0031] Specifically, in this embodiment, the mounting holes for mounting the fixing ribs 4 on the bearing seat 2 are located on the side of the bearing seat 2, thereby facilitating the installation and removal of the positioning pins 5.

[0032] In some embodiments, the bearing housing 2 may be adopted as follows: Figure 1 The structure shown. See also Figure 1 Fixing ribs 4 are installed on the top side and both sides of the bearing housing 2. When the bearing housing 2 is installed on the mounting bracket 1, fixing ribs 4 are installed on the sides perpendicular to the first direction, and the axis of the locating pin 5 on the fixing rib 4 is horizontal and perpendicular to the first direction. The axis of the locating pin 5 on the fixing rib 4 at the top of the bearing housing 2 is vertical. By setting multiple fixing ribs 4, the relative positions of the two bearing housings 2 perpendicular to the first direction can be fixed, thereby facilitating the subsequent installation of the spindle 10.

[0033] Specifically, in this embodiment, mounting holes for installing bearings are provided on both bearing seats 2. After subsequent maintenance, the two bearing seats 2 can be connected together by fixing ribs 4. The fixing ribs 4 can initially position the relative positions of the two bearing seats 2, and then the spindle 10 is installed onto the two bearing seats 2. Since the relative positions of the two bearing seats 2 are fixed, the bearings on the two bearing seats 2 can be ensured to be coaxial when installing the spindle 10, thus facilitating the installation of the spindle 10. After the spindle 10 is installed, it is then hoisted onto the mounting frame 1 for the next step of installation.

[0034] In some embodiments, the bearing housing 2 may be adopted as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3A support rod 6 is connected between the two bearing seats 2. Both ends of the support rod 6 are equipped with fixing components for securing it to the bearing seats 2. Both ends of the support rod 6 are fixedly installed on the two bearing seats 2 via these fixing components. After the bearing seats 2 and the spindle 10 are installed, the support rod 6 is then fixed between the two bearing seats 2. The support rod 6 provides support and fixation for the relative position of the two bearing seats 2, reducing vibration and noise during operation. Furthermore, the support rod 6 reduces the force on the locating pin 5, further ensuring the stability of the relative position between the two bearing seats 2.

[0035] Specifically, in this embodiment, there are multiple support rods 6, which surround the outside of the main shaft 10 and are evenly spaced along the circumference of the main shaft 10.

[0036] In some embodiments, the aforementioned fixing component may employ, for example... Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3 The fixing assembly includes two fasteners 7 threaded to the same end of the support rod 6, with the two fasteners 7 respectively abutting against the two side surfaces of the bearing housing 2 along the first direction. Both ends of the support rod 6 are threaded rods, and the bearing housing 2 has through holes for accommodating the threaded rods. Two fasteners 7, which are nuts, are threaded onto the threaded rods. By rotating the nuts, the two fasteners 7 on the threaded rods abut against the outer side walls of the bearing housing 2 on both sides, thereby fixing the threaded rods to the bearing housing 2. Simultaneously, when the relative positions of the two bearing housings 2 along the first direction change, the position of the fasteners 7 on the support rod 6 can be adjusted to achieve a re-tightening operation of the support rod 6.

[0037] In some embodiments, the mounting bracket 1 described above may be as follows: Figure 2 The structure shown. See also Figure 2 Two longitudinal beams 11, arranged along a first direction, are fixedly mounted on the mounting frame 1. The two longitudinal beams 11 are spaced apart, and a crossbeam 12 is fixedly connected between them. A positioning key 3 is installed between the longitudinal beams 11 and the crossbeam 12. Two longitudinal beams 11 are fixedly mounted on the top of the mounting frame 1, and a crossbeam 12 is fixedly mounted between them. The top surfaces of the longitudinal beams 11 and 12 are flush. A keyway for installing the positioning key 3 is provided at the connection between the longitudinal beams 11 and 12. When the positioning key 3 is placed inside the keyway, it is positioned between the crossbeam 12 and the longitudinal beams 11, further reinforcing the relative position between them.

[0038] Specifically, in this embodiment, the longitudinal beam 11 can enhance the force along the first direction, and the transverse beam 12 can enhance the force along the horizontal direction and perpendicular to the first direction. The positioning key 3 is placed between the transverse beam 12 and the longitudinal beam 11, thereby ensuring the stability of the installation position of the positioning key 3.

[0039] Specifically, in this embodiment, both the longitudinal beam 11 and the transverse beam 12 are made of I-beams.

[0040] In some embodiments, the bearing housing 2 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 Both the longitudinal beam 11 and the transverse beam 12 are provided with mounting holes for fixing the bearing housing 2. Mounting holes for installing the bearing housing 2 are also provided at the top of both the longitudinal beam 11 and the transverse beam 12. The bearing housing 2 is fixed to the longitudinal beam 11 and the transverse beam 12 using bolts and nuts. This facilitates the disassembly and installation of the bearing housing 2. Simultaneously, the mounting holes on both the longitudinal beam 11 and the transverse beam 12 allow the bearing housing 2 to be installed between the transverse beam 12 and the longitudinal beam 11 using bolts, improving the stability of the bearing housing 2. Furthermore, the simultaneous fixing of the bearing housing 2 between the transverse beam 12 and the longitudinal beam 11 enhances the bearing strength of the bearing housing 2 in both the transverse and longitudinal directions.

[0041] In some embodiments, the aforementioned crossbeam 12 may be as follows: Figure 2 The structure shown. See also Figure 2 The crossbeam 12 includes vertical ribs 121 with their width extending vertically into the interior of the longitudinal beam 11, and the positioning key 3 abuts against the vertical ribs 121. The vertical ribs 121 on the crossbeam 12 extend into the interior of the longitudinal beam 11 and are located inside the keyway, serving to support the positioning key 3. A keyway is formed on the top panel of the longitudinal beam 11, and the combination of the vertical ribs 121 and the top panel of the longitudinal beam 11 forms the keyway for placing the positioning key 3. The structure is simple, and the keyway can be machined without increasing the thickness of the top panel of the longitudinal beam 11.

[0042] In some embodiments, the spindle 10 described above can be as follows: Figure 1 The structure shown. See also Figure 1One of the bearing housings 2 is fixedly mounted with a gearbox 8 for connection to the main shaft 10. A universal coupling 91 connects the output shaft of the gearbox 8 to the generator 9. There are two bearing housings 2. Both ends of the main shaft 10 are rotatably mounted on the two bearing housings 2 via bearings, and the insertion ends of the main shaft 10 are located on the same side of each bearing housing 2. After the two bearing housings 2 are relatively fixed, the main shaft 10 can be inserted into the two bearing housings 2 from one side. The output end of the main shaft 10 is driven by the gearbox 8, and the output end of the gearbox 8 is driven by the generator 9. The generator 9 is fixedly mounted on the mounting bracket 1, and the input shaft of the generator 9 is connected to the main shaft 10 using a universal coupling 91. This reduces the connection precision of the generator 9 and facilitates its installation and debugging.

[0043] In some embodiments, the gearbox 8 described above may employ, for example... Figure 1 , Figure 4 The structure shown. See also... Figure 1 , Figure 4 Both the input shaft and the end of the main shaft 10 of the gearbox 8 are coaxially provided with positioning holes, and a pin slides inside the positioning holes. The gearbox 8 is fixedly mounted on the outer surface of the bearing housing 2 via a flange, and a positioning hole is provided on the input shaft of the gearbox 8, which passes through the input shaft and is coaxial with the input shaft. A positioning hole of the same size is provided at the end of the main shaft 10. When connecting the main shaft 10 and the gearbox 8, the pin can be inserted into the positioning hole to achieve coarse positioning between the main shaft 10 and the input shaft, which facilitates the alignment of the main shaft 10 into the gearbox 8. After subsequent debugging, the pin is removed, and a pin is added between the flange and the bearing housing 2 to fix the relative position of the gearbox 8 and the bearing housing 2.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind turbine main shaft mounting structure, characterized in that, include: Mounting bracket (1); There are two bearing seats (2), which are spaced apart and detachably mounted on the mounting frame (1). The two ends of the main shaft (10) are respectively rotatably mounted on the two bearing seats (2). The axial direction of the main shaft (10) is defined as the first direction. A positioning key (3) is installed between the bearing seat (2) and the mounting bracket (1) to prevent the two bearing seats (2) from being displaced along the first direction on the mounting bracket (1); The fixing rib (4) is inserted at both ends between the two bearing seats (2) to fix the relative position between the two bearing seats (2).

2. The wind turbine main shaft mounting structure as described in claim 1, characterized in that, The two ends of the fixing rib (4) are respectively inserted into the two bearing seats (2), and a positioning pin (5) is provided between the fixing rib (4) and the bearing seat (2).

3. The wind turbine main shaft mounting structure as described in claim 2, characterized in that, The fixing ribs (4) are installed on the top side and both sides of the bearing seat (2).

4. The wind turbine main shaft mounting structure as described in claim 1, characterized in that, A support rod (6) is also connected between the two bearing seats (2), and both ends of the support rod (6) are provided with fixing components for fixing to the bearing seats (2).

5. The wind turbine main shaft mounting structure as described in claim 4, characterized in that, The fixing assembly includes two fasteners (7) threaded to the same end of the support rod (6), and the two fasteners (7) respectively abut against the two sides of the bearing seat (2) along the first direction.

6. The wind turbine main shaft mounting structure as described in claim 1, characterized in that, Two longitudinal beams (11) are fixedly installed on the mounting bracket (1) along the first direction. The two longitudinal beams (11) are spaced apart, and a crossbeam (12) is fixedly connected between the two longitudinal beams (11). The positioning key (3) is installed between the longitudinal beams (11) and the crossbeam (12).

7. The wind turbine main shaft mounting structure as described in claim 6, characterized in that, Both the longitudinal beam (11) and the transverse beam (12) are provided with mounting holes for fixing the bearing seat (2).

8. The wind turbine main shaft mounting structure as described in claim 6, characterized in that, The crossbeam (12) includes vertical ribs (121) with a width along the vertical direction, the vertical ribs (121) extending into the interior of the longitudinal beam (11), and the positioning key (3) abutting against the vertical ribs (121).

9. The wind turbine main shaft mounting structure as described in claim 1, characterized in that, One of the bearing housings (2) is fixedly mounted with a gearbox (8) for connection with the main shaft (10), and a universal coupling (91) is connected between the output shaft of the gearbox (8) and the generator (9).

10. The wind turbine main shaft mounting structure as described in claim 9, characterized in that, The input shaft and the end of the main shaft (10) of the gearbox (8) are both provided with positioning holes on the same axis, and a shaft pin is slidably provided inside the positioning hole.

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