Main shaft hoisting device of wind driven generator

Abstract

The utility model discloses a hoisting device for a main shaft of a wind driven generator, which comprises a semicircular ring, a plurality of connecting holes which are formed in the semicircular ring and correspond to connecting holes of a wind wheel hub in position, an extension part arranged on the semicircular ring, and a cross beam which is arranged on the extension part and is distributed along the axial direction of the main shaft, the lifting lug is arranged on the cross beam and is provided with at least one lifting lug; the connecting holes are connected with the wind wheel hub connecting holes through bolts. By means of the scheme, the connecting structure has the advantages of being simple in structure, reliable in connection and the like, and has high practical value and popularization value in the technical field of maintenance and installation of wind driven generators.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine maintenance and installation technology, and in particular to a wind turbine main shaft hoisting device. Background Technology

[0002] The main bearing of a wind turbine is a key component of a wind turbine generator set. Its main function is to support the rotational movement of the turbine's main shaft, ensuring the smooth rotation of the impeller and main shaft, thereby enabling the transfer of mechanical energy. Figure 1 and Figure 2 As shown, the main bearing of a wind turbine mainly consists of a main shaft 200 and a bearing housing 100. This technology is primarily aimed at the maintenance and installation of the main bearing of a GE 2.75MW wind turbine. The bearing housing 100 is a single unit design, and the main shaft 200 is not horizontally arranged; it has a certain tilt angle. Currently, separating (assembling) the main shaft and bearing housing on-site at the wind farm is very inconvenient.

[0003] Therefore, there is an urgent need to propose a wind turbine main shaft hoisting device with a simple structure and reliable connection. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a wind turbine main shaft hoisting device. The technical solution adopted by this utility model is as follows:

[0005] A wind turbine main shaft hoisting device connects to the front end of the main shaft and hoists the main shaft into or out of a bearing housing; the front end of the main shaft is provided with several wind turbine hub connection holes. The wind turbine main shaft hoisting device includes a semi-circular ring, several connection holes on the semi-circular ring corresponding to the positions of the wind turbine hub connection holes, an extension portion on the semi-circular ring, a crossbeam on the extension portion arranged along the axial direction of the main shaft, and at least one lifting lug on the crossbeam; the connection holes are bolted to the wind turbine hub connection holes.

[0006] Furthermore, the crossbeam is provided with a first counterweight mounting part and a second counterweight mounting part.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] (1) This utility model ingeniously utilizes the wind turbine hub connection hole. After the wind turbine hub is disassembled, it can be connected to the connection hole using the wind turbine hub connection hole, and its installation is reliable.

[0009] (2) By setting a semi-circular ring and a crossbeam, the semi-circular ring is matched with the front end of the main shaft, and the crossbeam is arranged along the axial direction of the main shaft, which can not only ensure reliable connection, but also reduce the volume occupied, making hoisting more convenient and reliable.

[0010] (3) By setting up a first counterweight mounting part and a second counterweight mounting part, this utility model facilitates the connection of external counterweights during the installation and hoisting process of the lifting equipment, thus ensuring more reliable hoisting.

[0011] In summary, this utility model has the advantages of simple structure and reliable connection, and has high practical and promotional value in the field of wind turbine maintenance and installation technology. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope of protection. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a main bearing in the prior art.

[0014] Figure 2 This is a cross-sectional schematic diagram of a main bearing in the prior art.

[0015] Figure 3 This is a schematic diagram of the hoisting and installation of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of this utility model.

[0017] In the above figures, the component names corresponding to the reference numerals are as follows:

[0018] 100. Bearing housing; 200. Main shaft; 201. Wind turbine hub connection hole; 1. Semicircular ring; 2. Crossbeam; 3. Connection hole; 4. Extension part; 5. Lifting lug; 6. First counterweight mounting part; 7. Second counterweight mounting part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of this utility model include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0020] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0021] The terms "first" and "second," etc., used in the specification and claims of this embodiment are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0022] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0023] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0024] like Figures 1 to 4 As shown, this embodiment provides a wind turbine main shaft hoisting device, which connects to the front end of the main shaft 200 and hoists the main shaft 200 into or out of the bearing housing 100. Several wind turbine hub connection holes 201 are provided at the front end of the main shaft 200. These wind turbine hub connection holes 201 are bolted to the wind turbine hub. When maintenance is required on the main bearing of the wind turbine, the wind turbine hub must first be removed from the main bearing. The wind turbine hub connection holes 201 are cleverly used for connection when hoisting the main shaft 200.

[0025] Specifically, the wind turbine main shaft hoisting device includes a semi-circular ring 1, several connecting holes 3 on the semi-circular ring 1 corresponding to the positions of the wind turbine hub connecting holes 201, an extension 4 on the semi-circular ring 1, a crossbeam 2 on the extension 4 and arranged along the axial direction of the main shaft 200, and at least one lifting lug 5 on the crossbeam 2. The connecting holes 3 are bolted to the wind turbine hub connecting holes 201. During hoisting, the crossbeam 2 is placed on top of the bearing housing 100 and connected to the lifting equipment via the lifting lug 5, allowing the main shaft 200 to be hoisted (the hoisting movement direction is along the axial direction of the main shaft 200). In addition, since the center of gravity and stress point of the wind turbine main shaft hoisting device differ when it is hoisting the main shaft 200 and when it is not connected to the main shaft 200, this embodiment provides a first counterweight hanging part 6 and a second counterweight hanging part 7 on the crossbeam 2 to facilitate external configuration adjustments and ensure the balance of the wind turbine main shaft hoisting device.

[0026] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any changes made based on the design principles of this utility model, or any non-creative changes made on this basis, shall fall within the scope of protection of this utility model.

Claims

1. A wind turbine main shaft hoisting device, which connects to the front end of a main shaft (200) and hoists the main shaft (200) into or out of a bearing housing (100); the front end of the main shaft (200) is provided with a plurality of wind turbine hub connection holes (201), characterized in that, The wind turbine main shaft hoisting device includes a semi-circular ring (1), several connecting holes (3) opened on the semi-circular ring (1) and corresponding to the wind turbine hub connecting hole (201), an extension (4) set on the semi-circular ring (1), a crossbeam (2) set on the extension (4) and arranged along the axial direction of the main shaft (200), and a lifting lug (5) set on the crossbeam (2) and at least one of them; the connecting holes (3) and the wind turbine hub connecting hole (201) are bolted together.

2. The wind turbine main shaft hoisting device according to claim 1, characterized in that, The crossbeam (2) is provided with a first counterweight mounting part (6) and a second counterweight mounting part (7).

Images