Impeller system and wind turbine generator set

Abstract

The utility model discloses a kind of impeller system and wind generating set, the impeller system includes girder, blade and variable pitch mechanism, the both ends of the girder are connected with blade through variable pitch mechanism respectively;Wherein, the middle part of the girder is rigidly connected with wind generating set host computer;The utility model girder middle part is embedded with flange, can strengthen girder internal structure support rigidity simultaneously, and rigidly connected with host computer, the kinetic energy of impeller system is transmitted to host computer, i.e. girder whole actually as the hub of impeller system is used.Simultaneously the girder whole structure is smooth, rigidity meets requirements, can support both end blade and attitude control, and light in weight, length is moderate, convenient for transportation.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine generator impeller systems, and in particular to an impeller system and a wind turbine generator set. Background Technology

[0002] Conventional horizontal-axis wind turbines can only be designed up to a maximum power rating of 30MW. They typically use cylindrical towers, and the base supporting the drive train inside the nacelle is a cast iron, which is heavy and difficult to expand in size. This results in limited space in the wind turbine nacelle, and blades exceeding 150 meters in length become too long, causing transportation difficulties. Furthermore, longer blades reduce stiffness and become more flexible, making them more susceptible to extreme operating conditions during operation, potentially leading to excessive blade deformation and tower sweep. These issues limit the maximum power rating of horizontal-axis wind turbines. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing an impeller system and a wind turbine generator set, wherein the main beam is structurally designed to solve the transportation difficulties caused by the large power output of the wind turbine generator set, while also strengthening the overall rigidity of the impeller system.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: an impeller system, including a main beam, blades and a pitch mechanism, wherein the two ends of the main beam are respectively connected to the blades through the pitch mechanism; wherein, a flange penetrating the main beam is pre-embedded in the middle part of the main beam for rigid connection with the main unit of the wind turbine generator set.

[0005] Furthermore, the middle part of the main beam is in the shape of a flat cylinder, a cylindrical shape, or a hollow structure.

[0006] Furthermore, the flange is a metal cylindrical flange.

[0007] Furthermore, the main beam is one of a carbon fiber main beam, a fiberglass main beam, and a steel structure main beam.

[0008] Furthermore, the length of the main beam is not less than 3% of the swept diameter of the impeller system.

[0009] Furthermore, the length of the main beam is not less than 10% of the swept diameter of the impeller system.

[0010] A wind turbine generator set includes the aforementioned rotor system, main unit, and tower; the main unit is horizontally mounted on the top of the tower, and the rotor system is rigidly connected to the main unit.

[0011] Furthermore, the host computer has a built-in yaw system.

[0012] Furthermore, the tower is a metal truss tower.

[0013] Furthermore, the metal truss tower is a steel pipe truss tower.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. The main beam used in this utility model has a smooth overall structure and its rigidity meets the operation and maintenance requirements of wind turbine units. It can support the blades at both ends and attitude control. It is also lightweight and of moderate length, which solves the problems of transportation difficulties and reduced rigidity caused by the single blade length exceeding 150 meters after the wind turbine units are enlarged, thus achieving convenient transportation.

[0015] 2. The main beam has a metal cylindrical flange embedded in the middle section, which can strengthen the internal structural support rigidity of the main beam and rigidly connect it with the main unit, so as to transfer the kinetic energy of the impeller system to the main unit. In other words, the main beam as a whole can actually be used as the hub of the impeller system, which meets the operating rigidity requirements of the wind turbine impeller system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a structural schematic diagram of the main beam.

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0019] Figure 4 This is a radial structural sectional view of the main beam.

[0020] Figure 5 This is a schematic diagram of the structure of a wind turbine generator set that utilizes this invention. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Example 1 See Figures 1 to 4As shown, the impeller system provided in this embodiment includes a main beam 011, blades 012 and a pitch mechanism 013. The two ends of the main beam 011 are connected to the blades 012 through the pitch mechanism 013. Preferably, the impeller system in this embodiment is a double-blade impeller system, and the pitch position of the blades 012 is in the middle.

[0024] Preferably, the main beam 011 is made of carbon fiber, and the length of the main beam 011 is not less than 10% of the swept diameter of the impeller system. The middle part of the main beam 011 is flat cylindrical, and the two ends of the main beam 011 are cylindrical. It is manufactured by an integral molding process, and the overall structure is smooth. In this embodiment, a steel cylindrical flange 0111 that penetrates the main beam is pre-embedded in the middle part of the main beam 011. Preferably, the steel cylindrical flange 0111 is a steel cylindrical flange, which is used to rigidly connect with the wind turbine generator host 02 and improve the internal support rigidity of the main beam 011. In addition, the cross-sectional shape of the cylindrical flange can be elliptical or polygonal. The main beam 011 as a whole acts as the hub of the wind turbine generator impeller system.

[0025] Example 2 See Figure 5 As shown, the wind turbine generator set provided in this embodiment includes the rotor system 01, main unit 02, and steel pipe truss tower 03 described in embodiment 1; the main unit 02 is horizontally installed on the top of the steel pipe truss tower 03, the rotor system 01 is rigidly connected to the main unit 02 through the steel cylindrical flange 0111, and the main unit 02 has a built-in yaw system.

[0026] The impeller system 01 converts wind energy into mechanical energy, which is then input into the main unit 02 to generate electricity. The main unit 02 is equipped with a yaw system that yaws in real time at the top of the tower to align with the wind direction. The impeller system 01 is equipped with a pitch system that adjusts the angle of attack of the blades at both ends to ensure maximum wind energy absorption. The middle section of the impeller system 01 is a pre-set length of carbon fiber main beam structure, rigidly connected to the main unit 02, allowing mechanical energy to be input into the main unit 02 without a hub.

[0027] Example 3 The impeller system provided in this embodiment differs from that in Embodiment 1 in that it is a three-blade impeller system, with the blades' pitching position closer to their tips.

[0028] Example 4 The impeller system provided in this embodiment differs from that in Embodiment 1 in that the main beam is a fiberglass main beam, and the length of the main beam is not less than 3% of the swept diameter of the impeller system.

[0029] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An impeller system, characterized in that: It includes a main beam, blades, and a pitch mechanism. The two ends of the main beam are connected to the blades through the pitch mechanism. A flange that penetrates the main beam is embedded in the middle part of the main beam for rigid connection with the main unit of the wind turbine generator.

2. The impeller system according to claim 1, characterized in that: The middle part of the main beam is in the shape of a flat cylinder, a cylindrical shape, or a hollow structure.

3. The impeller system according to claim 1, characterized in that: The flange is a metal cylindrical flange.

4. The impeller system according to claim 1, characterized in that: The main beam is one of the following: carbon fiber main beam, fiberglass main beam, and steel structure main beam.

5. An impeller system according to claim 1, characterized in that: The length of the main beam is not less than 3% of the swept diameter of the impeller system.

6. An impeller system according to claim 5, characterized in that: The length of the main beam is not less than 10% of the swept diameter of the impeller system.

7. A wind turbine generator set, characterized in that: It includes the impeller system, main unit, and tower as described in any one of claims 1-6; the main unit is horizontally mounted on the top of the tower, and the impeller system is rigidly connected to the main unit.

8. A wind turbine generator set according to claim 7, characterized in that: The main unit has a built-in yaw system.

9. A wind turbine generator set according to claim 7, characterized in that: The tower is a metal truss tower.

10. A wind turbine generator set according to claim 9, characterized in that: The metal truss tower is a steel pipe truss tower.

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