Assembly type main frame of wind power generator cabin

Abstract

The invention provides a wind power generator cabin assembly type main rack, and belongs to the field of wind power generation equipment. The wind power generator cabin assembly type main rack comprises a main frame, a rear frame and a concrete pouring channel. The main frame is provided with a tower barrel butt joint position; the front end of the rear frame is connected with the rear end of the main frame; after the main frame and the rear frame are connected, the concrete pouring channel extends from the main frame to the rear frame and is located on the pressed sides of the main frame and the rear frame, and after the main frame and the rear frame are in butt joint, concrete is poured into the concrete pouring channel located on the pressed sides of the main frame and the rear frame, so that the main frame and the rear frame are connected. The solidified concrete is supported on the pressed sides of the main frame and the rear frame, and the overall strength after the main frame and the rear frame are connected is improved by utilizing the characteristics of light weight (relative to a cast iron material) and high compressive strength of the concrete, so that the strength is improved while the weight of the main frame is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of wind power generation equipment, and more specifically, to an assembled main frame of a wind turbine generator cabin. Background Art

[0002] The main frame is the main load-bearing component of the wind turbine. It is mainly used to install the wind rotor shaft, reducer, rear frame and other parts. It is used to transfer the loads of the wind rotor, reducer, generator and other parts to the tower. The strength of the main frame directly determines the safety of the wind turbine.

[0003] The current main frame is made of cast iron or steel, and is usually connected by bolts to the front and rear parts. In order to ensure the connection strength between the front and rear parts, it is usually strengthened by increasing the wall thickness, adding reinforcing ribs and connectors, but this will cause the overall mass of the main frame to increase sharply. As the weight of the main bracket increases, the difficulty of transportation and installation of the main frame will also increase further, thereby increasing the overall cost. In this regard, although it is possible to reduce the weight while ensuring the connection strength by replacing the connectors and reinforcing ribs with lightweight and high-strength materials, or directly replacing the main frame with other lightweight and higher-strength materials, it is difficult to achieve the current cost and cannot be mass-produced. Therefore, there is an urgent need for a new solution that can reduce the mass of the main frame while ensuring the strength of the main frame. Summary of the invention

[0004] In view of this, an embodiment of the present application provides an assembled main frame of a wind turbine cabin to solve the technical problem of the heavy weight of the main frame existing in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] On the one hand, a wind turbine cabin assembled main frame is provided, comprising:

[0007] Main frame, with tower docking position;

[0008] A rear frame, the front end of which is suitable for connection with the rear end of the main frame;

[0009] The concrete pouring channel extends from the main frame to the rear frame after the main frame is connected to the rear frame, and is located at the compression side of the main frame and the rear frame.

[0010] In some embodiments, the main frame is provided with a reducer bracket, which includes a reducer rear support, which is located at the rear end of the main frame and protrudes in a direction away from the concrete pouring channel, so that when the prestressed cable pulls the main frame and the rear frame, the top of the rear bracket supports the cable, so that the main frame and the rear frame are flexed and deformed in a direction opposite to the flexing direction when in use.

[0011] In some embodiments, the top surface of the reducer rear support is a support surface, the support surface is provided with a through groove along the front-back direction, a rolling wheel is provided in the through groove, and the rolling wheel is completely immersed in the through groove;

[0012] The through groove is suitable for the prestressed cable to pass through, and when the prestressed cable passes through, it is supported by the rolling wheel to form a rolling fit.

[0013] In some embodiments, the depth of the through groove is sufficient to allow the prestressed cable to be completely immersed when passing through.

[0014] In some embodiments, the reducer bracket includes a reducer front support, and the reducer front support is provided with a front cable connection position; the rear frame is provided with a generator bracket, and the generator bracket includes a generator rear support, and the generator rear support is provided with a rear cable connection position; in the height direction of the tower, the height of the rolling wheel is higher than the height of the front cable connection position and the rear cable connection position.

[0015] In some embodiments, the front cable connection position includes a front through hole provided on the front side of the reducer front support, the front through hole faces the proximal end of the through slot and is suitable for installing an anchor for fixing the prestressed cable; and / or

[0016] The rear cable connection position includes a rear through hole arranged on the rear side of the generator rear support, the rear through hole faces the proximal end of the through slot and is suitable for installing an anchor for fixing the prestressed cable.

[0017] In some embodiments, the concrete pouring channel comprises:

[0018] A front channel is provided at the lower side of the main frame; the front channel comprises two sub-channels respectively along the front and rear directions, the two sub-channels are respectively located on both sides of the tower docking position, and the rear ends of the two sub-channels are connected and surround the rear side of the tower docking position in an arch shape

[0019] The rear channel is arranged at the lower side of the rear frame, and the rear channel includes a plurality of single channels along the front-to-back direction, and the front end of each single channel is connected with the rear side of the front channel surrounding the tower tube docking position.

[0020] In some embodiments, a plurality of threaded holes are disposed on the top of the concrete pouring channel, and the plurality of threaded holes are distributed along the extension axis of the concrete pouring channel.

[0021] In some embodiments, the toughness of the material used for the concrete casting channel is greater than the toughness of the material used for the main frame or the rear frame.

[0022] In some embodiments, the main frame and the rear frame are made of cast iron, and the concrete pouring channel is made of wrought iron.

[0023] The beneficial effect of the assembled main frame of the wind turbine cabin provided by the embodiment of the present application is that compared with the prior art, the assembled main frame of the wind turbine cabin in the embodiment of the present application, after the main frame and the rear frame are docked, concrete is poured into the concrete pouring grooves located on the compression sides of the main frame and the rear frame, so that the solidified concrete is supported on the compression sides of the main frame and the rear frame, and the characteristics of light weight (relative to cast iron materials) and high compressive strength of concrete are utilized to increase the overall strength after the main frame and the rear frame are connected, thereby reducing the weight of the main frame while improving the strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of the top view of the assembled main frame of a wind turbine cabin provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the assembled main frame of a wind turbine cabin from a top view;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross section of the center split slot;

[0028] Figure 4 for Figure 1 A side structural diagram of the assembled main frame of a wind turbine cabin.

[0029] Among them, the reference numerals in the figure are:

[0030] 1-main frame; 11-tower docking position; 12-reducer rear support; 13-through groove; 14-rolling wheel; 15-reducer front support; 16-front through hole; 2-rear frame; 21-generator rear support; 22-rear through hole; 3-concrete pouring channel; 31-sub-groove; 32-single groove; 33-threaded hole; 4-prestressed cable. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0035] Please also read Figures 1 to 4 The assembled main frame of the wind turbine nacelle provided in the embodiment of the present application is now described. An assembled main frame of the wind turbine nacelle comprises:

[0036] Main frame, with tower docking position;

[0037] A rear frame, the front end of which is adapted to be connected to the rear end of the main frame;

[0038] The concrete pouring channel extends from the main frame to the rear frame after the main frame is connected to the rear frame and is located on the compression side of the main frame and the rear frame.

[0039] Compared with the prior art, the assembled main frame of the wind turbine cabin in the embodiment of the present application, after the main frame and the rear frame are docked, concrete is poured into the concrete pouring grooves located on the compression sides of the main frame and the rear frame, so that the solidified concrete is supported on the compression sides of the main frame and the rear frame, and the overall strength of the main frame after the connection with the rear frame is increased by utilizing the characteristics of light weight (relative to cast iron materials) and high compressive strength of concrete, thereby reducing the weight of the main frame while improving the strength.

[0040] In this embodiment, the specific structure of the main frame and the rear frame can refer to the prior art. Usually, the main frame and the rear frame can be cast from cast iron materials, or welded from steel. The tower docking position of the main frame is used to be rotatably connected to the top of the tower and to install the yaw system. The main frame can be used to fix components such as the wind rotor shaft and the reducer, and the rear frame can be used to fix components such as the reducer, the generator and the cooling system. The first docking portion and the second docking portion can be connecting plates with multiple bolt holes, and the two connecting plates are fixed with bolts after being fitted.

[0041] When in use, the assembled main frame of the wind turbine cabin is assembled with the rotor shaft, reducer, generator and other components at the top of the tower to form a complete generator set. The main frame and rear frame are bent and deformed under the force of the rotor shaft, reducer, generator and other components (mainly the gravity of each component), so that one side is tensile and the other side is compressed. The concrete pouring channel is located on the compression side of the main frame and rear frame. Normally, the upper side of the main frame and rear frame is the tension side, and the lower side is the compression side.

[0042] The concrete pouring trough may be a separate structure from the main frame and the rear frame. After the concrete pouring trough is independently processed, it is fixed to the main frame and the rear frame with bolts. More specifically, the concrete pouring trough may be an integral structure. After the main frame and the rear frame are connected, it is fixed to the compression side of the main frame and the rear frame as a whole. The concrete pouring trough may also be a split structure divided into two sections. The two sections are respectively fixed to the compression side of the main frame and the rear frame by bolts. When the main frame and the rear frame are connected, the two sections are butt-jointed to form a complete concrete pouring trough. In addition, the concrete pouring trough may be a split structure divided into two sections. The two sections are respectively integral structures with the main frame and the rear frame. When the main frame and the rear frame are connected, the two sections are butt-jointed to form a complete concrete pouring trough. It is worth noting that when the concrete pouring trough is divided into two sections, the butt joint of the two sections can be plugged in to avoid concrete leakage.

[0043] See also Figure 1 and Figure 4As a specific embodiment of the assembled main frame of the wind turbine cabin provided in the present application, the main frame is provided with a reducer bracket, the reducer bracket includes a reducer rear support, the reducer rear support is located at the rear end of the main frame, and protrudes in the direction away from the concrete pouring channel, so that when the prestressed cable pulls the main frame and the rear frame, the top of the rear bracket supports the cable, so that the main frame and the rear frame are flexed and deformed in the direction opposite to the flexure direction when in use.

[0044] In this embodiment, during the installation process, prestressed cables are used to bypass the top of the rear bracket, and the main frame and the rear frame are pulled at both ends, so that the main frame and the rear frame produce a certain degree of flexural deformation, and the direction is opposite to the flexural deformation direction when in use. At this time, concrete is poured into the concrete pouring channel and wait for the concrete to harden, so that the concrete is prestressed, so that after the assembled main frame of the wind turbine cabin and the wind rotor shaft, reducer, generator and other components are assembled into a complete generator set at the top of the tower, the deformation of the main frame and the rear frame is reduced.

[0045] In the specific implementation, one end of the prestressed cable is fixed to the front end of the main frame by a hook, the middle part is passed around the top of the rear bracket, and the other end passes through the hole at the rear end of the rear frame (which can be formed by fixing a steel pipe or punching a hole at the rear end of the rear frame), and then the prestressed cable is tightened using an anchor in conjunction with an anchor cable tensioning machine.

[0046] More specifically, the reducer bracket also includes a reducer front support, and the reducer is supported by the front and rear supports. The rear frame is provided with a generator bracket, and in the height direction of the tower, the height of the reducer rear support is higher than the height of the reducer front support and the generator bracket.

[0047] See also Figures 1 to 4 As a specific implementation of the assembled main frame of the wind turbine cabin provided by the present application, the top surface of the rear support of the reducer is the support surface, and the support surface is provided with a through groove along the front-back direction, and a rolling wheel is provided in the through groove, and the rolling wheel is completely immersed in the through groove;

[0048] The through groove is suitable for the prestressed cable to pass through, and when the prestressed cable passes through, it is supported by the rolling wheel to form a rolling fit.

[0049] In this embodiment, the top surface of the reducer rear support is a support surface for supporting the docking point of the reducer. The rolling wheel is completely immersed in the through groove of the docking surface of the reducer rear support, so that the rolling wheel does not affect the docking point of the reducer and the support surface. The prestressed cable is supported by the rolling wheel in the through groove, reducing the friction with the reducer rear support.

[0050] During the implementation process, the two ends of the prestressed cable are respectively connected to the main frame and the rear frame, and the middle passes through the through groove and is supported by the rolling wheel. Then concrete is poured into the concrete pouring channel. After the concrete solidifies, the prestressed cable is removed, and then the reducer is installed so that the docking point of the reducer is butted against the support surface of the rear support of the reducer.

[0051] See also Figure 1 and Figure 4 As a specific implementation of the assembled main frame of the wind turbine cabin provided by the present application, the depth of the through groove is sufficient to allow the prestressed cable to be completely immersed when passing through.

[0052] In this embodiment, the prestressed cable is completely immersed in the through groove, and the reducer can be directly installed without removing the prestressed cable. The prestressed cable will not affect the connection between the reducer's docking point and the support surface of the reducer rear support.

[0053] During the implementation process, when the prestressed cables pull the main frame and the rear frame, the reducer can be directly installed without waiting for the concrete in the concrete pouring channel to solidify. The prestressed cables can be removed after the concrete in the concrete pouring channel solidifies, or the prestressed cables can be used as part of the assembled main frame of the wind turbine cabin without being removed.

[0054] See also Figure 4 As a specific embodiment of the assembled main frame of the wind turbine cabin provided in the present application, the reducer bracket includes a reducer front support, and the reducer front support is provided with a front cable connection position; the rear frame is provided with a generator bracket, and the generator bracket includes a generator rear support, and the generator rear support is provided with a rear cable connection position; in the height direction of the tower, the height of the rolling wheel is higher than the height of the front cable connection position and the rear cable connection position.

[0055] In this embodiment, the front cable connection position is set at the reducer front support, and the rear cable connection position is set at the generator rear support, and the high-strength reducer bracket and generator bracket are used as the force points to avoid damage to the overall structure. In addition, since the reducer and the generator are the main weight components of the wind turbine generator set, the reverse deflection formed by the main frame and the rear frame as a whole can be closer to the deflection during use (the deflection direction is opposite) by using prestressed cables, so that the support of the main frame and the rear frame by the concrete in the concrete pouring channel can better match the weight distribution of the reducer and the generator on the assembled main frame of the wind turbine cabin.

[0056] During implementation, the reducer bracket may include multiple support parts distributed front and back, and the reducer front support is the support part that is located forward relative to the center of gravity of the reducer; similarly, the generator bracket may include multiple support parts distributed front and back, and the generator rear support is the support part that is located backward relative to the center of gravity of the generator.

[0057] It should be noted that the height direction of the tower is the direction from the bottom of the tower to the top. Figure 4 In the upward direction.

[0058] See also Figure 4 As a specific embodiment of the assembled main frame of the wind turbine cabin provided by the present application, the front cable connection position includes a front through hole arranged on the front side of the reducer front support, the front through hole faces the proximal end of the through groove and is suitable for installing an anchor for fixing the prestressed cable; and / or

[0059] The rear cable connection position comprises a rear through hole arranged on the rear side of the rear support of the generator, the rear through hole faces the proximal end of the through slot and is suitable for installing an anchor for fixing the prestressed cable.

[0060] In this example, at least one of the front cable connection position and the rear cable connection position can be installed with an anchor, so that the prestressed cable can be tensioned using existing anchor tensioning equipment.

[0061] In a specific implementation, a front through hole is provided on the front side of the reducer front support, and the front through hole faces the proximal end of the through slot. The shape of the front through hole is determined according to the prestressed anchor on the market, for example, it can be trumpet-shaped.

[0062] Similarly, a rear through hole is provided on the rear side of the rear support of the generator, the rear through hole faces the proximal end of the through slot, and the shape of the rear through hole is determined according to the prestressed anchor on the market, for example, it may be trumpet-shaped.

[0063] It should be noted that the proximal end of the through slot refers to an end of the through slot close to a certain main body, so for different main bodies, the end referred to by the proximal end of the through slot may be different.

[0064] See also Figure 2 As a specific implementation of the assembled main frame of the wind turbine cabin provided in this application, the concrete pouring channel includes:

[0065] The front channel is arranged at the lower side of the main frame; the front channel includes two sub-channels along the front and rear directions, the two sub-channels are respectively located on both sides of the tower docking position, and the rear ends of the two sub-channels are connected and surround the rear side of the tower docking position in an arch shape.

[0066] The rear channel is arranged at the lower side of the rear frame, and comprises a plurality of single channels along the front-to-back direction, and the front end of each single channel is connected with the rear side of the front channel surrounding the tower tube docking position.

[0067] In this embodiment, the two branch grooves of the front channel are along the front-to-back direction, so that the concrete inside can increase the strength of the main frame in the front-to-back direction; the multiple single grooves of the rear channel are along the front-to-back direction, so that the concrete inside can increase the strength of the rear frame in the front-to-back direction. The rear ends of the two branch grooves of the front channel form an arched connecting part on the rear side of the tower tube docking position, and the front end of the single groove of the rear channel is connected to the connecting part, so that the concrete in the front channel can better withstand the pressure of the concrete in the rear channel.

[0068] See also Figure 2 and Figure 3 As a specific implementation of the assembled main frame of the wind turbine cabin provided in the present application, a plurality of threaded holes are provided on the top of the concrete pouring channel, and the plurality of threaded holes are distributed along the extension axis of the concrete pouring channel.

[0069] In this embodiment, the threaded hole can be used as an exhaust hole when pouring concrete into the concrete pouring channel. After the concrete pouring is completed and before the concrete is solidified, a long bolt can be screwed into the concrete pouring channel through the threaded hole so that the long bolt is buried in the internal concrete, thereby making the internal concrete and the concrete pouring channel more firmly combined.

[0070] In a specific implementation, the inner cavity of the concrete pouring channel is a pipe structure. When pouring, pouring is performed from the opening at either end of the concrete pouring channel, and the air in the concrete pouring channel is discharged from the threaded hole. The threaded hole is set at the top of the concrete pouring channel to avoid leakage of concrete during pouring, and can also prevent concrete from contaminating the thread to a certain extent.

[0071] As a specific implementation of the assembled main frame of the wind turbine cabin provided in the present application, the toughness of the material used for the concrete pouring channel is greater than the toughness of the material used for the main frame or the rear frame.

[0072] In this embodiment, the main frame or the rear frame is made of a material with lower toughness, which can improve their respective rigidity, while the concrete pouring channel is made of a material with better toughness, which can prevent the concrete poured inside from expanding and cracking, and use the concrete inside to improve the pressure bearing capacity.

[0073] In specific implementation, the main frame or rear frame is made of cast iron material, and the concrete pouring channel is made of wrought iron material with greater toughness than cast iron material. Of course, the main frame or rear frame can also be welded with steel with a higher carbon content, and the concrete pouring channel can be made of steel with a lower carbon content with higher toughness.

[0074] As a specific implementation of the assembled main frame of the wind turbine cabin provided in the present application, the main frame and the rear frame are made of cast iron, and the concrete pouring channel is made of wrought iron.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The assembled main frame of the wind turbine cabin is characterized by: include: Main frame, with tower docking position; A rear frame, the front end of which is suitable for connection with the rear end of the main frame; The concrete pouring channel extends from the main frame to the rear frame after the main frame is connected to the rear frame, and is located at the compression side of the main frame and the rear frame.

2. The assembled main frame of the wind turbine cabin according to claim 1, characterized in that: The main frame is provided with a reducer bracket, and the reducer bracket includes a reducer rear support. The reducer rear support is located at the rear end of the main frame and protrudes in the direction away from the concrete pouring channel, so that when the prestressed cable pulls the main frame and the rear frame, the top of the rear bracket supports the cable, so that the main frame and the rear frame are flexed and deformed in the direction opposite to the flexure direction when in use.

3. The assembled main frame of the wind turbine cabin as claimed in claim 2, characterized in that: The top surface of the rear support of the reducer is a support surface, and the support surface is provided with a through groove along the front-back direction, and a rolling wheel is provided in the through groove, and the rolling wheel is completely immersed in the through groove; The through groove is suitable for the prestressed cable to pass through, and when the prestressed cable passes through, it is supported by the rolling wheel to form a rolling fit.

4. The assembled main frame of the wind turbine cabin as claimed in claim 3, characterized in that: The depth of the through groove is such that the prestressed cable can be completely immersed when passing through.

5. The assembled main frame of the wind turbine cabin as claimed in claim 3, characterized in that: The reducer bracket includes a reducer front support, and the reducer front support is provided with a front cable connection position; the rear frame is provided with a generator bracket, and the generator bracket includes a generator rear support, and the generator rear support is provided with a rear cable connection position; in the height direction of the tower, the height of the rolling wheel is higher than the height of the front cable connection position and the rear cable connection position.

6. The assembled main frame of the wind turbine cabin as claimed in claim 5, characterized in that: The front cable connection position includes a front through hole provided on the front side of the reducer front support, the front through hole faces the proximal end of the through slot and is suitable for installing an anchor for fixing the prestressed cable; and / or The rear cable connection position includes a rear through hole arranged on the rear side of the generator rear support, the rear through hole faces the proximal end of the through slot and is suitable for installing an anchor for fixing the prestressed cable.

7. The assembled main frame of the wind turbine cabin according to claim 1, characterized in that: The concrete pouring channel comprises: A front channel is provided at the lower side of the main frame; the front channel comprises two sub-channels respectively along the front and rear directions, the two sub-channels are respectively located on both sides of the tower docking position, and the rear ends of the two sub-channels are connected and surround the rear side of the tower docking position in an arch shape The rear channel is arranged at the lower side of the rear frame, and the rear channel includes a plurality of single channels along the front-to-back direction, and the front end of each single channel is connected with the rear side of the front channel surrounding the tower tube docking position.

8. The assembled main frame of the wind turbine cabin as claimed in claim 1, characterized in that: A plurality of threaded holes are arranged on the top of the concrete pouring channel, and the plurality of threaded holes are distributed along the extension axis of the concrete pouring channel.

9. The assembled main frame of the wind turbine cabin according to claim 1, characterized in that: The toughness of the material used for the concrete pouring channel is greater than the toughness of the material used for the main frame or the rear frame.

10. The assembled main frame of the wind turbine cabin according to claim 9, characterized in that: The main frame and the rear frame are made of cast iron, and the concrete pouring channel is made of wrought iron.

Images