Concrete wind turbine main frame and wind turbine

Abstract

The concrete wind turbine main frame and wind turbine belong to the technical field of wind turbines, and comprise a main frame reinforcement cage, a first connecting reinforcement cage arranged at the top end of the main frame reinforcement cage, and a second connecting reinforcement cage arranged at the bottom end of the main frame reinforcement cage; and the first connecting reinforcement cage, the main frame reinforcement cage, and the second connecting reinforcement cage are internally poured with concrete. After the main frame reinforcement cage, the first connecting reinforcement cage, and the second connecting reinforcement cage are combined to form the shape of the main frame, the internal pouring of the concrete realizes the cooperation with the reinforcement cage to improve the overall main frame structural strength. The density of the concrete in a unit area is less than that of nodular cast iron, and the price is lower than that of nodular cast iron, thereby realizing the reduction of self-weight and material cost, reducing the manufacturing cost, and improving the price reduction space.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically a concrete wind turbine main frame and a wind turbine. Background Technology

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current (AC). A wind turbine typically consists of components such as a wind turbine rotor, generator (including the generator itself), directional control unit (tail fin), tower, speed limiting safety mechanism, and energy storage device.

[0003] The working principle of a wind turbine is relatively simple. The wind turbine rotates under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the turbine shaft. The generator then rotates under the drive of the turbine shaft to generate electricity. Broadly speaking, wind energy is also solar energy, so a wind turbine can also be described as a thermal energy generator that uses the sun as a heat source and the atmosphere as a working medium.

[0004] With the rapid development of the wind power industry, large-blade and large-megawatt turbines are constantly being introduced, leading to increasingly fierce market competition. Currently, the price of a single-unit wind turbine has entered the thousand-yuan era, and manufacturers are actively seeking effective cost reduction solutions. The main frame, as a supporting component located within the wind turbine nacelle, primarily supports the main shaft and connects to the yaw mechanism. Therefore, as a crucial component of the overall support system, the main frame is typically made of ductile iron, resulting in significant weight and cost. With the standardization of main frame structures, the cost reduction effect of ductile iron main frames is not significant, limiting the potential for price reductions in wind turbines. Summary of the Invention

[0005] To address the problem that the main frame of existing wind turbines is made of ductile iron, resulting in high weight and cost, this invention provides a concrete wind turbine main frame and wind turbine that can reduce weight and save costs.

[0006] This invention is achieved through the following technical solution:

[0007] A concrete-type wind turbine main frame includes a main frame steel cage, a first connecting steel cage at the top of the main frame steel cage, and a second connecting steel cage at the bottom of the main frame steel cage; the first connecting steel cage, the main frame steel cage, and the second connecting steel cage are filled with concrete.

[0008] After the main frame is formed by the main frame steel cage, the first connecting steel cage and the second connecting steel cage, concrete is poured inside it to improve the overall structural strength of the main frame by cooperating with the steel cage. The density of concrete per unit area is less than that of ductile iron, and the price is lower than that of ductile iron, which can reduce the self-weight and material costs, reduce manufacturing costs, and increase the room for price reduction.

[0009] A further improvement of the present invention is that two first connecting steel cages are provided, and the two first connecting steel cages are spaced apart on both sides of the main frame steel cage; the upper part of the main frame steel cage is provided with a main shaft clearance groove, and the main shaft clearance groove is disposed between the two first connecting steel cages. The main shaft clearance groove is used for the passage of the main shaft connecting the rotor blades and the generator, which helps to save space occupied when the main shaft is fitted with the main frame, and creates space for subsequent installation of accessories supporting the main shaft.

[0010] A further improvement of the present invention is that a main frame connecting plate is provided inside the main frame reinforcement cage. By pre-setting the main frame connecting plate inside the main frame reinforcement cage, it helps to improve the forming efficiency of the main frame reinforcement cage during concrete pouring, and the pre-setting of the main frame connecting plate can also improve the overall structural strength.

[0011] A further improvement of the present invention is that a yaw drive embedded connecting plate is provided inside the second connecting steel cage. By pre-setting the yaw drive embedded connecting plate inside the second connecting steel cage, the forming efficiency of the second connecting steel cage during concrete pouring is improved, and the pre-setting of the yaw drive embedded connecting plate also enhances the overall structural strength.

[0012] A further improvement of the present invention is that the aforementioned yaw drive embedded connecting plate is provided with a yaw drive connecting threaded hole. The yaw drive connecting threaded hole facilitates the connection operation with the yaw device.

[0013] A further improvement of the present invention is that the bottom surface of the aforementioned yaw drive embedded connection plate is provided with a yaw gear ring and a brake embedded connection plate. The pre-installation of the yaw gear ring and brake embedded connection plate further enhances the structural strength of the bottom of the main frame steel cage.

[0014] A further improvement of the present invention is that the aforementioned yaw gear ring and brake embedded connecting plate are provided with a brake connection threaded hole. The brake connection threaded hole facilitates connection with the structural components acting on the spindle brake.

[0015] A further improvement of the present invention is that a first embedded connecting plate is provided inside the first connecting steel cage; the first embedded connecting plate includes a first plate segment and a second plate segment connected end to end and forming an L-shape; the first plate segment extends into the first connecting steel cage, and the second plate segment extends into the main frame steel cage. The L-shaped first embedded connecting plate helps to improve the connection strength between the first connecting steel cage and the main frame steel cage, and the first plate segment serves as the connection part for the bearing seat and elastic support, while the second plate segment serves as the connection part for the yaw drive. While improving the structural strength of the main frame, it also considers reserving installation space for the fixed support of nearby components.

[0016] A further improvement of the present invention is that the end of the first plate segment away from the second plate segment is provided with a bearing seat connecting threaded hole, the end of the first plate segment near the second plate segment is provided with an elastic support connecting threaded hole, and the second plate segment is provided with a generator base connecting threaded hole.

[0017] The present invention provides a wind turbine generator, comprising the aforementioned concrete wind turbine generator main frame.

[0018] As can be seen from the above technical solutions, the beneficial effects of the present invention are: after the main frame steel cage, the first connecting steel cage and the second connecting steel cage are used to form the shape of the main frame, concrete is poured inside it to achieve the cooperation with the steel cage and improve the overall structural strength of the main frame. The density of concrete per unit area is less than that of ductile iron, and its price is lower than that of ductile iron, thereby reducing the self-weight and material costs, reducing manufacturing costs, and increasing the room for price reduction. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. 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 a steel cage structure according to a specific embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal connecting plate structure of the reinforcing cage according to a specific embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the first pre-embedded connecting plate according to a specific embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the top surface of the yaw drive embedded connection plate according to a specific embodiment of the present invention.

[0024] Figure 5This is a schematic diagram of the bottom surface of the yaw drive embedded connection plate according to a specific embodiment of the present invention.

[0025] In the attached diagram: 10, main frame reinforcing cage; 11, main shaft clearance groove; 20, first connecting reinforcing cage; 30, second connecting reinforcing cage; 40, main frame connecting plate; 50, first embedded connecting plate; 51, first plate segment; 511, bearing seat connecting threaded hole; 512, elastic support connecting threaded hole; 52, second plate segment; 521, generator base connecting threaded hole; 60, yaw drive embedded connecting plate; 61, yaw drive connecting threaded hole; 70, yaw gear ring and brake embedded connecting plate; 71, brake connecting threaded hole. Detailed Implementation

[0026] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] As attached Figure 1-5 As shown, this invention provides a concrete-type wind turbine main frame, including a main frame reinforcing cage 10. A first connecting reinforcing cage 20 is provided at the top of the main frame reinforcing cage 10, and a second connecting reinforcing cage 30 is provided at the bottom of the main frame reinforcing cage 10. Concrete is poured into the interiors of the first connecting reinforcing cage 20, the main frame reinforcing cage 10, and the second connecting reinforcing cage 30. Connecting plates are provided within all three reinforcing cages, which helps improve the forming efficiency during concrete pouring and enhances the overall structural strength of the main frame.

[0028] Specifically, the main frame reinforcement cage 10 is equipped with a main frame connecting plate 40. Pre-installing the main frame connecting plate 40 within the main frame reinforcement cage 10 helps improve the forming efficiency of the main frame reinforcement cage 10 during concrete pouring, and the pre-installation of the main frame connecting plate 40 also enhances the overall structural strength. The upper part of the main frame reinforcement cage 10 is equipped with a main shaft clearance groove 11, which allows the main shaft connecting the rotor blades and the generator to pass through. This helps save space occupied when the main shaft mates with the main frame and creates space for the subsequent installation of accessories supporting the main shaft.

[0029] Two first connecting steel cages 20 are provided, and the two first connecting steel cages 20 are spaced apart on both sides of the main shaft clearance groove 11; the main shaft clearance groove 11 is located between the two first connecting steel cages 20. A first embedded connecting plate 50 is provided inside the first connecting steel cage 20; the first embedded connecting plate 50 includes a first plate segment 51 and a second plate segment 52 connected end to end and in an L-shape; the first plate segment 51 extends into the first connecting steel cage 20, and the second plate segment 52 extends into the main frame steel cage 10. The L-shaped first embedded connecting plate 50 helps to improve the connection strength between the first connecting steel cage 20 and the main frame steel cage 10, and the first plate segment 51 serves as the connection part of the bearing seat and elastic support, and the second plate segment 52 serves as the connection part with the yaw drive. While improving the structural strength of the main frame, it also considers reserving installation space for the fixed support of nearby components.

[0030] The first plate segment 51 has 9 non-uniformly distributed bearing housing connection threaded holes 511 for fixing bearing housings at one end away from the second plate segment 52; the first plate segment 51 has 8 elastic support connection threaded holes 512 for fixing elastic supports at one end near the second plate segment 52; and the second plate segment 52 has 9 generator base frame connection threaded holes 521 for fixing generator base frame.

[0031] The second connecting steel cage 30 is equipped with a yaw drive embedded connecting plate 60. The pre-embedded yaw drive connecting plate 60 within the second connecting steel cage 30 helps improve the forming efficiency of the second connecting steel cage 30 during concrete pouring, and the pre-embedded yaw drive connecting plate 60 also enhances the overall structural strength. The yaw drive embedded connecting plate 60 has 10 yaw drive connecting threaded holes 61, evenly distributed along the circumference of the yaw drive embedded connecting plate 60. Each yaw drive mounting hole has 24 support threaded holes along the circumference. The yaw drive connecting threaded holes 61 facilitate connection with the yaw device.

[0032] The bottom surface of the yaw drive embedded connecting plate 60 is provided with a yaw gear ring and a brake embedded connecting plate 70. The pre-installation of the yaw gear ring and brake embedded connecting plate 70 further enhances the structural strength of the bottom of the main frame steel cage 10. The yaw gear ring and brake embedded connecting plate 70 is provided with brake connection threaded holes 71. There are 18 sets of brake connection threaded holes 71, evenly distributed along the circumference of the yaw gear ring and brake embedded connecting plate 70. The brake connection threaded holes 71 facilitate convenient connection with structural components acting on the main shaft brake.

[0033] The first embedded connecting plate 50, the main frame connecting plate 40, the yaw drive embedded connecting plate 60, and the yaw gear ring and brake embedded connecting plate 70 are connected together in sequence. This helps to improve the structural support strength of the connecting plates inside the steel cage in conjunction with the concrete.

[0034] Another aspect of the present invention provides a wind turbine generator, including the above-described concrete wind turbine generator main frame.

[0035] As can be seen from the above technical solutions, the beneficial effects of the present invention are: after the main frame steel cage, the first connecting steel cage and the second connecting steel cage are used to form the shape of the main frame, concrete is poured inside it to achieve the cooperation with the steel cage and improve the overall structural strength of the main frame. The density of concrete per unit area is less than that of ductile iron, and its price is lower than that of ductile iron, thereby reducing the self-weight and material costs, reducing manufacturing costs, and increasing the room for price reduction.

[0036] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0037] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use 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. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A concrete-type wind turbine main frame, characterized in that, The main frame steel cage (10) is provided with a first connecting steel cage (20) at the top and a second connecting steel cage (30) at the bottom; the first connecting steel cage (20), the main frame steel cage (10) and the second connecting steel cage (30) are filled with concrete. There are two first connecting steel cages (20), and the two first connecting steel cages (20) are spaced apart on both sides of the main frame steel cage (10); the upper part of the main frame steel cage (10) is provided with a main shaft clearance groove (11), and the main shaft clearance groove (11) is located between the two first connecting steel cages (20); The first connecting steel cage (20) is provided with a first embedded connecting plate (50); the first embedded connecting plate (50) includes a first plate segment (51) and a second plate segment (52) that are connected end to end and form an L shape; the first plate segment (51) extends into the first connecting steel cage (20), and the second plate segment (52) extends into the main frame steel cage (10); The first plate segment (51) is provided with a bearing seat connecting threaded hole (511) at the end away from the second plate segment (52), and the first plate segment (51) is provided with an elastic support connecting threaded hole (512) at the end near the second plate segment (52). The second plate segment (52) is provided with a generator base connecting threaded hole (521). Each of the three steel cages is equipped with a connecting plate. The first embedded connecting plate (50), the main frame connecting plate (40), the yaw drive embedded connecting plate (60), and the yaw gear ring and brake embedded connecting plate (70) are connected together in sequence.

2. The concrete wind turbine main frame according to claim 1, characterized in that, The main frame steel cage (10) is equipped with a main frame connecting plate (40).

3. The concrete wind turbine main frame according to claim 2, characterized in that, The second connecting steel cage (30) is equipped with a yaw drive embedded connecting plate (60).

4. The concrete wind turbine main frame according to claim 3, characterized in that, The yaw drive pre-embedded connection plate (60) is provided with a yaw drive connection threaded hole (61).

5. A concrete wind turbine main frame according to claim 4, characterized in that, The bottom surface of the yaw drive embedded connecting plate (60) is provided with a yaw gear ring and a brake embedded connecting plate (70).

6. A concrete wind turbine main frame according to claim 5, characterized in that, The yaw gear ring and brake pre-embedded connecting plate (70) is provided with a brake connection thread hole (71).

7. A wind turbine generator, characterized in that, Including the concrete wind turbine mainframe as described in any one of claims 1 to 6.

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