Fan blade structure

Abstract

The utility model provides a fan blade structure, relates to the technical field of air treatment equipment, and solves the technical problem of high installation difficulty in the prior art. The fan blade structure comprises a blade disc assembly, a shaft and a connecting piece, a mounting hole is formed in the blade disc assembly, a connecting part is arranged at one end of the shaft, the connecting part penetrates through the mounting hole and is detachably connected with the connecting piece, the mounting hole close to the connecting part is a non-cylindrical hole, and the shaft close to the connecting part is matched with the non-cylindrical hole. According to the utility model, through the non-rotating connection of the shaft and the non-cylindrical hole and the fixed connection mode of the connecting piece, the non-rotating installation is ensured, and the installation difficulty can be reduced at the same time.

Description

Technical Field

[0001] This utility model relates to the field of air handling equipment technology, and in particular to a fan blade structure. Background Technology

[0002] Traditional fan blades and shafts are usually connected by an interference fit. In actual operation, interference fits require extremely high precision in machining dimensions. The installation process often requires specialized equipment and tools, which not only makes installation difficult, but also makes it easy to damage the parts during disassembly. Utility Model Content

[0003] The purpose of this utility model is to provide a fan blade structure that solves the technical problem of high installation difficulty in the prior art. The various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The wind turbine structure provided by this utility model includes a blade disk assembly, a shaft, and a connector. The blade disk assembly has a mounting hole, and one end of the shaft has a connecting part. The connecting part passes through the mounting hole and is detachably connected to the connector. The mounting hole near the connecting part is a non-cylindrical hole, and a portion of the shaft near the connecting part is adapted to the non-cylindrical hole.

[0006] Preferably, the impeller assembly includes an impeller and a limiting connection part. The impeller has a shaft hole at its center and a limiting groove at one end of the impeller near the connector. The limiting connection part is disposed in the limiting groove and has a non-cylindrical insertion hole on it. The insertion hole communicates with the shaft hole to form the mounting hole.

[0007] Preferably, the shaft includes a first shaft segment, a second shaft segment, a third shaft segment, and the connecting portion arranged sequentially. The diameter of the first shaft segment is larger than the diameter of the second shaft segment. A step is formed at the connection between the first shaft segment and the second shaft segment. The step abuts against the impeller. The second shaft segment passes through the shaft hole. The third shaft segment is adapted to be inserted into the insertion hole.

[0008] Preferably, the insertion hole is an oblong hole, and the third shaft segment is a column with an oblong cross-section.

[0009] Preferably, the limiting connection part is a block-shaped body, and the limiting connection part is embedded in the limiting groove.

[0010] Preferably, the connecting part is a stud, and the connecting element is a nut.

[0011] Preferably, the impeller assembly further includes blades, wherein multiple blades are evenly arranged on the impeller.

[0012] Preferably, the leading edge of the blade has a smooth transition, and the trailing edge of the blade has a sharp point.

[0013] The application employs the above technical solution and has at least the following beneficial effects:

[0014] The wind turbine structure includes a bladed disk assembly, a shaft, and a connector. The bladed disk assembly has mounting holes, and one end of the shaft has a connecting part. The connecting part passes through the mounting holes and is detachably connected to the connector. The mounting holes near the connecting part are non-cylindrical, and a portion of the shaft near the connecting part is adapted to the non-cylindrical holes. This method restricts the non-rotational connection between the shaft and the bladed disk assembly, and the installation of the shaft and the bladed disk assembly is achieved through the connector, making installation easy.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the wind turbine structure provided in an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the bladed disk assembly provided in an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the wind turbine structure provided in this embodiment of the utility model;

[0020] Figure 4 This is an exploded view of the wind turbine blade structure provided in this embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the shaft structure provided in an embodiment of the present utility model.

[0022] In the figure: 1. Impeller assembly; 2. Shaft; 3. Connector; 4. Mounting hole; 5. Connection part; 6. Impeller; 7. Shaft hole; 8. Limiting groove; 9. Insertion hole; 10. First shaft section; 11. Second shaft section; 12. Third shaft section; 13. Blade; 14. Limiting connection part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] A specific embodiment of this utility model provides a wind turbine structure, combined with an attached... Figure 1 -Appendix Figure 5 As shown, the assembly mainly includes an impeller assembly 1, a shaft 2, and a connector 3. The impeller assembly 1 has a mounting hole 4 for mounting the shaft 2. One end of the shaft 2 has a connecting part 5, which can pass through one end of the mounting hole 4 and be exposed at the other end. The connecting part 5 and the connector 3 are detachably connected, allowing for quick assembly and disassembly. The mounting hole 4 near the connecting part 5 is a non-cylindrical hole, and a portion of the shaft 2 near the connecting part 5 is adapted to this non-cylindrical hole. This adaptation connection between the non-cylindrical hole and the portion of the shaft 2 achieves a non-rotational connection. Therefore, the non-cylindrical hole can be a polygonal cylindrical hole, an oblong hole, or a cylindrical body with a cross-section composed of line segments and arcs of any shape. Thus, this application achieves detachable installation through the non-rotational connection between the shaft 2 and the mounting hole 4, and the detachability of the connecting part 5 and the connector 3, ensuring a non-rotational connection while reducing the difficulty of assembly and disassembly.

[0025] In the embodiments of this application, the impeller assembly 1 includes an impeller 6 and a limiting connection part 14. A columnar body coaxial with the impeller 6 is provided at the center of one end face of the impeller 6. A through shaft hole 7 is provided in this columnar body. A limiting groove 8 is provided at one end of the impeller 6 near the connector 3. The limiting connection part 14 is disposed in the limiting groove 8. The limiting connection part 14 and the limiting groove 8 are non-rotatably connected. A non-cylindrical insertion hole 9 is provided on the limiting connection part 14. The insertion hole 9 communicates with the shaft hole 7 to form a mounting hole 4. In this way, by setting the limiting connection part 14, the mounting hole 4 is divided into two parts: the insertion hole 9 and the shaft hole 7, which facilitates the production of the impeller assembly 1. The shaft hole 7 can be a cylindrical hole, while the insertion hole 9 is a non-cylindrical hole, so it is easier to process the limiting connection part 14 separately.

[0026] In some embodiments, in conjunction with the appendix Figure 5As shown, the shaft 2 includes a first shaft segment 10, a second shaft segment 11, a third shaft segment 12, and a connecting part 5 arranged sequentially. The shaft 2 is an integral structure. The diameter of the first shaft segment 10 is larger than the diameter of the second shaft segment 11. A step is formed at the connection between the first shaft segment 10 and the second shaft segment 11. When the shaft 2 is inserted into the shaft hole 7, the step will abut against the impeller 6. The second shaft segment 11 passes through the shaft hole 7. The third shaft segment 12 is fitted and inserted into the insertion hole 9. Finally, it is connected to the connector 3 through the connecting part 5, thereby realizing the fixed connection between the shaft 2 and the impeller assembly 1.

[0027] In some embodiments, the insertion hole 9 can be an oblong hole, for which the third shaft segment 12 is a column with an oblong cross section, and the two arc-shaped portions of the oblong hole can also have the same arc curvature as the shaft hole 7.

[0028] In some embodiments, the limiting connection part 14 is a block-shaped body, and the limiting connection part 14 is embedded in the limiting groove 8. The embedded setting allows the limiting connection part 14 and the limiting groove 8 to be controlled within a very small tolerance range, so as to ensure that the impeller assembly 1 and the shaft 2 can achieve high-precision coaxial cooperation.

[0029] In some embodiments, the connecting part 5 is a stud and the connecting member 3 is a nut, and the nut connection method makes the connection more convenient.

[0030] Alternatively, the connection between the insertion hole 9 and the third shaft section 12 can be strengthened by using an interference fit or a pin connection, making the connection between the fan blade and the shaft more robust and reliable. It should be noted that since the thickness of the limiting connection part 14 is much smaller than the depth of the shaft hole 7 on the blade disk 6, the disassembly and assembly are relatively simple compared to the traditional integral interference fit method.

[0031] In some embodiments, the bladed disk assembly 1 further includes blades 13, which are multiple and evenly arranged on the bladed disk 6. The leading edge of the blades 13 has a smooth transition, which can effectively reduce the resistance when air enters; the trailing edge of the blades 13 has a sharp shape, which helps to reduce the generation of eddies in the wake region and reduce energy loss.

[0032] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A wind turbine blade structure, characterized in that, The device includes an impeller assembly, a shaft, and a connector. The impeller assembly has a mounting hole, and one end of the shaft has a connecting part. The connecting part passes through the mounting hole and is detachably connected to the connector. The mounting hole near the connecting part is a non-cylindrical hole, and a portion of the shaft near the connecting part is adapted to the non-cylindrical hole.

2. The wind turbine blade structure according to claim 1, characterized in that, The impeller assembly includes an impeller and a limiting connection part. The impeller has a shaft hole at its center and a limiting groove at one end of the impeller near the connector. The limiting connection part is disposed in the limiting groove and has a non-cylindrical insertion hole on it. The insertion hole communicates with the shaft hole to form the mounting hole.

3. The wind turbine blade structure according to claim 2, characterized in that, The shaft includes a first shaft segment, a second shaft segment, a third shaft segment, and the connecting part arranged sequentially. The diameter of the first shaft segment is larger than the diameter of the second shaft segment. A step is formed at the connection between the first shaft segment and the second shaft segment. The step abuts against the impeller. The second shaft segment passes through the shaft hole. The third shaft segment is adapted to be inserted into the insertion hole.

4. The wind turbine blade structure according to claim 3, characterized in that, The insertion hole is a waist-shaped hole, and the third shaft segment is a column with a waist-shaped axial cross-section.

5. The wind turbine blade structure according to claim 2, characterized in that, The limiting connection part is a block-shaped body, and the limiting connection part is embedded in the limiting groove.

6. The wind turbine blade structure according to any one of claims 1-5, characterized in that, The connecting part is a stud, and the connecting element is a nut.

7. The wind turbine blade structure according to claim 2, characterized in that, The bladed disk assembly also includes blades, which are multiple and evenly arranged on the bladed disk.

8. The wind turbine blade structure according to claim 7, characterized in that, The leading edge of the blade has a smooth transition, and the trailing edge of the blade is sharp.

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