A blade positioning pin and blade positioning structure of a wind turbine generator system

Abstract

The utility model discloses a kind of blade positioning pin and blade positioning structure of wind turbine unit, for the installation positioning between the hub and blade of wind turbine unit, the blade positioning pin includes cylindrical portion, connecting portion and coniform portion connected in turn;The surface of cylindrical portion is provided with thread, cylindrical portion can be connected with hub by the thread;In the axial direction of blade positioning pin, the diameter of coniform portion gradually increases towards cylindrical portion, coniform portion can extend into the root of blade, to realize the positioning guide between the root of blade and hub;Compared with prior art, the blade positioning pin of the utility model provides positioning guide effect in blade installation process, blade positioning pin does not need to be disassembled after blade installation is completed, avoid the problem that leaf root bolt is replaced into long guide pin in the process of installing blade in prior art and is easily jammed, while improve the installation efficiency of the blade of wind turbine unit.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine blade installation, and in particular to a blade positioning pin and blade positioning structure for a wind turbine. Background Technology

[0002] During the on-site hoisting of wind turbine generators, the alignment of the blades with the hub is crucial. Current technology typically involves pre-installing blade root bolts on the blades, then precisely inserting over a hundred blade root bolts into the pitch bearing mounting holes during installation. If the blade root bolts are misaligned with the mounting holes, they will be sheared, severely impacting their lifespan. The current solution to this problem is to replace one or more blade root bolts with long guide pins before blade installation to assist in alignment. After the blade root bolts are fully inserted, the long guide pins are replaced with normal blade root bolts, and then torque is applied. However, this method still presents problems. If the long guide pins are not perfectly aligned with the mounting holes, they can easily become jammed, preventing removal and thus hindering the replacement with normal blade root bolts for continued installation. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a blade positioning pin and blade positioning structure for wind turbine generator sets. This structure provides positioning guidance during the installation of wind turbine generator set blades without requiring disassembly, thereby smoothly assisting in the alignment of the blade root bolts with the mounting holes and improving the installation efficiency of wind turbine generator set blades.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: a blade positioning pin for a wind turbine generator set, the blade positioning pin being used for installation and positioning between the hub and the blade of the wind turbine generator set; the blade positioning pin includes a cylindrical portion, a connecting portion, and a conical portion connected in sequence; the surface of the cylindrical portion is provided with threads, and the cylindrical portion can be connected to the hub of the wind turbine generator set through the threads; in the axial direction of the blade positioning pin, the diameter of the conical portion gradually increases towards the cylindrical portion, and the conical portion can extend into the root of the blade.

[0005] Furthermore, the two opposite sides of the cone-shaped portion are provided with concave grooves.

[0006] Furthermore, the radial distance between the slots on both sides of the tapered portion is 24 mm.

[0007] Furthermore, the tapered portion includes a variable diameter section and a cylindrical section, the larger end of the variable diameter section is connected to the cylindrical section, and the smaller end of the variable diameter section is a free end.

[0008] Furthermore, the taper of the variable diameter section is 75°.

[0009] Furthermore, the thread on the surface of the cylindrical portion is an M24 thread.

[0010] A blade positioning structure for a wind turbine generator set includes a blade transition flange, a blade, and a plurality of blade positioning pins according to the aforementioned wind turbine generator set. The blade transition flange is mounted on the hub of the wind turbine generator set. The blade transition flange has a plurality of circumferentially distributed blade positioning pin mounting holes. The cylindrical portion of the blade positioning pin is connected to the blade positioning pin mounting holes. The root of the blade has a plurality of pin holes, and the tapered portion of the blade positioning pin passes through the pin holes.

[0011] Furthermore, the blade transition flange is provided with at least three circumferentially distributed blade positioning pin mounting holes, and at least three blade positioning pins are connected to the blade positioning pin mounting holes accordingly. The root of the blade is provided with at least three pin holes.

[0012] Furthermore, the blade transition flange is provided with 6 circumferentially distributed blade positioning pin mounting holes; there are 6 blade positioning pins, which are connected one-to-one with the 6 blade positioning pin mounting holes; the root of the blade is provided with 6 pin holes.

[0013] Furthermore, the mounting hole for the blade positioning pin is an M24 threaded hole.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: The blade positioning pin of this invention provides positioning guidance during the installation of wind turbine blades, thereby assisting in the alignment of the blade root bolts with the mounting holes. The blade positioning pin does not need to be disassembled after the blade installation is completed, fundamentally eliminating the problem of long guide pin jamming that occurs when the blade root bolts are replaced with long guide pins, and improving the installation efficiency of wind turbine blades. Attached Figure Description

[0015] Figure 1 This is a front view of the blade locating pin.

[0016] Figure 2 This is a side view of the blade locating pin.

[0017] Figure 3 This is a schematic diagram of the blade transition flange.

[0018] Figure 4 This is a schematic diagram of the installation structure of the blade transition flange and the hub. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] 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.

[0021] Example 1 See Figures 1 to 2 As shown, the blade positioning pin of the wind turbine generator provided in this embodiment is used for the installation and positioning between the hub (not shown in the figure) and the blade (not shown in the figure) of the wind turbine generator. The blade positioning pin includes a cylindrical part 4, a connecting part 3, and a conical part 1 connected in sequence.

[0022] The cylindrical part 4 has a thread on its surface, and the cylindrical part 4 can be connected to the hub of the wind turbine generator (not shown in the figure) through the thread. Preferably, the thread on the surface of the cylindrical part 4 is an M24 thread.

[0023] Along the axial direction of the blade locating pin, the diameter of the tapered portion 1 gradually increases towards the cylindrical portion 4, and the tapered portion 1 can extend into the root of the blade (not shown in the figure). The tapered portion 1 has concave grooves 2 on opposite sides, and the radial distance between the grooves 2 on both sides of the tapered portion 1 is 24 mm. The tapered portion 1 includes a variable diameter section 101 and a cylindrical section 102. The larger end of the variable diameter section 101 is connected to the cylindrical section 102, and the smaller end of the variable diameter section 101 is a free end. Preferably, the taper of the variable diameter section 101 is 75°.

[0024] Example 2 The blade positioning structure of the wind turbine generator provided in this embodiment includes a blade transition flange 5, a blade (not shown in the figure), and three blade positioning pins as described in Embodiment 1.

[0025] See Figures 3 to 4 As shown, the blade transition flange 5 is installed on the hub 7 of the wind turbine generator set. The blade transition flange 5 has three circumferentially distributed blade locating pin mounting holes 6. The blade locating pin mounting holes 6 are M24 threaded holes. The cylindrical part 4 of the blade locating pin is threadedly connected to the blade locating pin mounting holes 6.

[0026] Meanwhile, the root of the blade (not shown in the figure) is provided with three pin holes (not shown in the figure), and the tapered part 1 of the blade positioning pin passes through the pin holes (not shown in the figure), thereby realizing the positioning guidance between the root of the blade (not shown in the figure) and the blade transition flange 5.

[0027] Example 3 The blade positioning structure of the wind turbine provided in this embodiment differs from that in Embodiment 2 in that the number of blade positioning pin mounting holes, blade positioning pins, and pin holes are all 6.

[0028] The above 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. A blade positioning pin for a wind turbine generator set, characterized in that: The blade positioning pin is used for installation and positioning between the hub and the blade of the wind turbine generator set; the blade positioning pin includes a cylindrical part, a connecting part and a conical part connected in sequence; the surface of the cylindrical part is provided with threads, and the cylindrical part can be connected to the hub of the wind turbine generator set through the threads; in the axial direction of the blade positioning pin, the diameter of the conical part gradually increases towards the cylindrical part, and the conical part can extend into the root of the blade.

2. The blade positioning pin of a wind turbine generator set according to claim 1, characterized in that: The conical section has recessed grooves on its opposite sides.

3. The blade positioning pin of a wind turbine generator set according to claim 2, characterized in that: The radial distance between the slots of the tapered section is 24 mm.

4. The blade positioning pin of a wind turbine generator set according to claim 1, characterized in that: The tapered section includes a variable diameter section and a cylindrical section. The large end of the variable diameter section is connected to the cylindrical section, and the small end of the variable diameter section is a free end.

5. The blade positioning pin of a wind turbine generator set according to claim 4, characterized in that: The taper of the variable diameter section is 75°.

6. The blade positioning pin of a wind turbine generator set according to claim 1, characterized in that: The thread on the surface of the cylindrical part is an M24 thread.

7. A blade positioning structure for a wind turbine generator set, characterized in that: The device includes a blade transition flange, a blade, and a plurality of blade locating pins according to any one of claims 1-6; the blade transition flange is mounted on the hub of the wind turbine, the blade transition flange has a plurality of circumferentially distributed blade locating pin mounting holes, the cylindrical portion of the blade locating pin is connected to the blade locating pin mounting holes; the root of the blade has a plurality of pin holes, and the tapered portion of the blade locating pin passes through the pin holes.

8. The blade positioning structure of a wind turbine generator set according to claim 7, characterized in that: The blade transition flange is provided with at least three circumferentially distributed blade positioning pin mounting holes, and at least three blade positioning pins are connected to the blade positioning pin mounting holes. The root of the blade is provided with at least three pin holes.

9. The blade positioning structure of a wind turbine generator set according to claim 8, characterized in that: The blade transition flange is provided with 6 circumferentially distributed blade positioning pin mounting holes; there are 6 blade positioning pins, which are connected one-to-one with the 6 blade positioning pin mounting holes; the root of the blade is provided with 6 pin holes.

10. The blade positioning structure of a wind turbine generator set according to claim 7, characterized in that: The mounting hole for the blade positioning pin is an M24 threaded hole.

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