Distributed couplings used in wind turbines

Abstract

This utility model provides a distributed coupling for wind turbines. The driving wheel connected to the wind turbine shaft is axially connected to the driven wheel connected to the generator shaft via bearings and steel ropes. This allows the driving wheel to drive the driven wheel to rotate with a delay by taut steel ropes. The elastic deformation of the steel ropes absorbs the instantaneous impact loads during wind turbine operation, while simultaneously achieving delayed transmission to reduce mechanical stress concentration. This effectively buffers instantaneous impact loads and noise, achieving delayed transmission and improving the reliability of the transmission system. The metal steel ropes also avoid aging problems caused by environmental factors, improving the stability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine coupling technology, specifically to a distributed coupling applied to wind turbines. Background Technology

[0002] In wind power generation systems, couplings are key components connecting the drive shaft and driven shaft, and their performance directly affects the operational stability and reliability of the equipment. Currently, commonly used couplings are mainly star-shaped couplings and belt couplings.

[0003] The star-shaped perforated coupling relies on elastic perforated pads to transmit torque and can accommodate a certain degree of misalignment between the driving and driven shafts, achieving synchronous rotation of the driven shaft when the driving shaft rotates. However, this coupling lacks the ability to adjust the angle lag between the two shafts. During fan operation, it cannot buffer the instantaneous impact caused by speed fluctuations and mechanical vibrations, which can easily lead to accelerated wear of transmission components and shorten the service life of the equipment.

[0004] Belt couplings utilize the elastic deformation of belts to accommodate misalignment between the drive and driven shafts, allowing the driven shaft to lag behind the drive shaft by a certain angle before rotating, thus providing a buffering effect. However, belts are typically made of rubber or synthetic fibers, which are susceptible to aging and wear due to ultraviolet radiation, wind, sand, rain, and snow during long-term outdoor operation of wind turbines. This leads to decreased transmission efficiency and even belt breakage, resulting in high maintenance costs. Utility Model Content

[0005] In view of this, the problem to be solved by this utility model is to provide a distributed coupling for use in wind turbines.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A distributed coupling used in wind turbines connects the driving wheel of the wind turbine shaft to the driven wheel of the generator shaft via bearings and steel ropes in the axial direction. This allows the driving wheel to drive the driven wheel to rotate with a delay by tucking the steel ropes.

[0008] The length of the steel rope is greater than the straight-line distance between the driving pulley and the driven pulley.

[0009] The driving wheel and the driven wheel are evenly provided with through grooves that are adapted to the steel rope fixing head of the steel rope. The steel rope fixing head passes through the through groove and is detachably connected to the driving wheel and the driven wheel by a locking member.

[0010] The outer periphery of the steel rope fixing head is provided with an annular protrusion, the diameter of which is larger than the diameter of the through groove. The outer periphery of the steel rope fixing head is provided with a threaded portion, and the locking element is a nut.

[0011] The steel rope fixing head is a tubular structure, and the steel rope is axially connected to the steel rope fixing head through a sleeve.

[0012] The outer periphery of the steel rope fixing head is provided with a through hole that communicates with the inner cavity, and the fastening nail is fixed in the through hole with its end tightly abutting the steel rope.

[0013] Both the driving wheel and the driven wheel are tubular wheel and axle structures, including the shaft portion I of the driving wheel which is fixedly connected to the inner ring of the bearing, and the wheel portion II of the driven wheel which is fixedly connected to the outer ring of the bearing.

[0014] The driven wheel's shaft II is connected to the generator via the generator shaft, and the driving wheel's wheel I is connected to the fan shaft via the fan flange.

[0015] The advantages and positive effects of this utility model are:

[0016] In this invention, the driving wheel connected to the fan shaft is axially connected to the driven wheel connected to the generator shaft via bearings and a steel rope. This allows the driving wheel to drive the driven wheel to rotate with a delay by tucking the steel rope. The elastic deformation of the steel rope absorbs the instantaneous impact load during fan operation, while simultaneously achieving delayed transmission to reduce mechanical stress concentration. This effectively buffers instantaneous impact loads and noise, achieving the advantages of delayed transmission and improving the reliability of the transmission system. The metal steel rope also avoids aging problems caused by environmental factors, improving the stability of equipment operation. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 This is an overall structural diagram of the distributed coupling of this utility model applied to a wind turbine in the unstretched state of the steel rope.

[0020] Figure 2 This is a schematic diagram of the bearing position in a distributed coupling of a wind turbine, according to the present invention.

[0021] Figure 3 This is an overall structural diagram of the distributed coupling of this utility model applied to a wind turbine under steel rope tension.

[0022] Figure 4 This is a structural diagram of the steel rope fixing head in the distributed coupling of a wind turbine, which is an application of this utility model.

[0023] Figure 5This is a structural diagram of the distributed coupling of this utility model used to connect the wind turbine flange and the generator;

[0024] Figure 6 yes Figure 5 Enlarged view at point A;

[0025] In the diagram: drive wheel 12, shaft I121, wheel I122, driven wheel 22, shaft II221, wheel II222, bearing 3, steel rope 4, steel rope fixing head 41, generator 5, fan flange 6. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figures 1 to 4 As shown, this utility model provides a distributed coupling for wind turbines. The driving wheel 12 connected to the wind turbine shaft is axially connected to the driven wheel 22 connected to the generator shaft via a bearing 3 and a steel rope 4, so that the driving wheel 12 drives the driven wheel 22 to rotate with a delay by tightening the steel rope 4.

[0030] Specifically, the drive wheel 12 is fixedly connected to the fan shaft. When the fan shaft rotates, it drives the drive wheel 12 to rotate. The two ends of the steel rope 4 are fixed to the drive wheel 12 and the driven wheel 22 respectively. The bearing 3 is installed between the drive wheel 12 and the driven wheel 22. As the drive wheel 12 rotates, the steel rope 4 is tightened, causing a relative rotation angle difference between the drive wheel 12 and the driven wheel 22. The elastic deformation of the steel rope 4 can absorb some of the impact energy. When the steel rope 4 is tightened, the drive wheel 12 drives the driven wheel 22 to start rotating through the tension. That is, through the design of the steel rope 4, this utility model makes the rotation of the driven wheel 22 time-delayed relative to the drive wheel 12, forming a flexible transmission. In this process, the elastic characteristics of the steel rope 4 can also buffer the instantaneous impact transmitted by the fan shaft. In addition, the metal material also avoids the aging problem caused by environmental factors.

[0031] Specifically, the length of the steel rope 4 is greater than the straight-line distance between the driving wheel 12 and the driven wheel 22, so that the steel rope 4 forms a natural sag during transmission. When the driving wheel 12 drives the steel rope 4, the sag of the steel rope 4 allows it to undergo elastic bending deformation, thereby buffering the instantaneous impact caused by speed fluctuations or mechanical vibrations. At the same time, the flexible bending characteristics of the steel rope 4 avoid local stress concentration in the contact area with the driving wheel 12 and the driven wheel 22, thus extending the service life of the steel rope 4, the driving wheel 12, and the driven wheel 22.

[0032] Specifically, through grooves adapted to the steel rope fixing head 41 of the steel rope 4 are evenly opened on the wheel surface of the driving wheel 12 and the wheel surface of the driven wheel 22. After passing through the through groove, the steel rope fixing head 41 is detachably connected to the driving wheel 12 and the driven wheel 22 through the locking member.

[0033] The through groove is a through hole structure opened on the wheel surface. The size of the through groove matches the shape of the steel rope fixing head 41 and is used to constrain the displacement of the steel rope fixing head 41. The outer periphery of the steel rope fixing head 41 is constructed with an annular protrusion 411. The diameter of the annular protrusion 411 is larger than the diameter of the through groove. The outer periphery of the steel rope fixing head 41 is constructed with a threaded part. The locking element is a nut 42. After the steel rope fixing head 41 is inserted into the through groove, the annular protrusion 411 forms a limiting contact with the wheel body surface. At this time, the exposed threaded part of the steel rope fixing head 41 is tightened and fixed by the nut 42, so that the steel rope 4 and the wheel body form a rigid connection. When the steel rope 4 needs to be replaced, only the nut 42 needs to be removed to take the steel rope fixing head 41 out of the through groove without damaging the wheel body structure.

[0034] Precise positioning is achieved through the matching structure of the through groove and the steel rope fixing head 41, avoiding connection failure caused by radial offset. The detachable locking structure improves the efficiency of steel rope 4 replacement. During maintenance, there is no need to disassemble the wheel body or the entire coupling, reducing downtime. The evenly distributed through groove layout effectively disperses dynamic loads and extends the service life of the driving wheel 12, driven wheel 22 and steel rope 4.

[0035] like Figures 5 to 6 As shown, specifically, the steel rope fixing head 41 is a tubular structure, which can be made of metal tubing. Its inner diameter is adapted to the outer diameter of the steel rope to achieve axial insertion. The steel rope 4 is axially inserted and connected to the steel rope fixing head 41. The outer circumference of the steel rope fixing head 41 has a through hole that communicates with the inner cavity. The fastening nail 43 is fixed in the through hole and its end is tightly against the steel rope 4. The fastening nail 43 is a metal part with a threaded or conical structure, which can be implemented by bolts or pins. Radial fixation is formed by pressing the surface of the steel rope 4. That is, after the steel rope 4 passes through the inner cavity of the tubular steel rope fixing head 41, the fastening nail 43 is embedded from the through hole and abuts against the surface of the steel rope 4. The inner wall of the tubular structure applies a circumferential wrapping force to the steel rope 4, restricting the radial displacement of the steel rope 4. The end of the fastening nail 43 presses into the surface of the steel rope 4 to generate friction, preventing the steel rope 4 from slipping under axial load, thereby forming a multi-directional constraint and making the steel rope and the fixing head rigidly connected.

[0036] Specifically, both the driving wheel 12 and the driven wheel 22 are tubular wheel and axle structures. The shaft portion I121 of the driving wheel 12 is fixedly connected to the inner ring of the bearing 3, and the wheel portion II222 of the driven wheel 22 is fixedly connected to the outer ring of the bearing 3. The shaft portion II221 of the driven wheel 22 is connected to the generator 5 through the generator shaft, and the wheel portion I122 of the driving wheel 12 is connected to the fan shaft through the fan flange 6. By using fully rigid metal connectors, the impact of material aging on transmission efficiency is fundamentally eliminated, while the split connection structure retains the convenience of maintenance.

[0037] The working principle and process of this utility model are as follows:

[0038] The drive wheel 12 is connected to the wind turbine shaft via the wind turbine flange 6. When the wind turbine blades drive the wind turbine shaft to rotate, the drive wheel 12 rotates synchronously. Since the drive wheel 12 is connected to the driven wheel 22 via the bearing, the drive wheel 12 cannot apply transmission force to the driven wheel 22 before the steel cable 4 is tightened. Therefore, the drive wheel 12 rotates relative to the driven wheel 22, causing a relative rotation angle difference between the drive wheel 12 and the driven wheel 22. Furthermore, the elastic deformation of the steel cable 4 can absorb some of the impact energy.

[0039] When the steel rope 4 is taut, the driving wheel 12 drives the driven wheel 22 to start rotating through the steel rope 4, which causes a time delay in the rotation of the driven wheel 22 relative to the driving wheel 12. The elasticity of the steel rope 4 can also buffer the instantaneous impact transmitted by the fan shaft. In addition, the metal material also avoids aging problems caused by environmental factors.

[0040] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A distributed coupling applied to wind turbines, characterized in that, The drive wheel (12) connected to the wind turbine shaft is axially connected to the driven wheel (22) connected to the generator shaft via a bearing (3) and a steel rope (4), so that the drive wheel (12) drives the driven wheel (22) to rotate in a delayed manner by tightening the steel rope (4).

2. The distributed coupling applied to a wind turbine according to claim 1, characterized in that, The length of the steel rope (4) is greater than the straight-line distance between the driving wheel (12) and the driven wheel (22).

3. The distributed coupling applied to a wind turbine according to claim 1, characterized in that, The drive wheel (12) and the driven wheel (22) are evenly provided with through grooves that are adapted to the steel rope fixing head (41) of the steel rope (4). The steel rope fixing head (41) passes through the through groove and is detachably connected to the drive wheel (12) and the driven wheel (22) through a locking member.

4. The distributed coupling applied to a wind turbine according to claim 3, characterized in that, The outer periphery of the steel rope fixing head (41) is provided with an annular protrusion (411), the diameter of which is larger than the diameter of the through groove. The outer periphery of the steel rope fixing head (41) is provided with a threaded portion, and the locking element is a nut (42).

5. The distributed coupling for wind turbines according to claim 4, characterized in that, The steel rope fixing head (41) is a tubular structure, and the steel rope (4) is axially connected to the steel rope fixing head (41); The outer periphery of the steel rope fixing head (41) is provided with a through hole that communicates with the inner cavity, and the fastening nail (43) is fixed in the through hole with its end tightly abutting the steel rope (4).

6. The distributed coupling applied to a wind turbine according to claim 1, characterized in that, Both the driving wheel (12) and the driven wheel (22) are tubular wheel and axle structures. The shaft part I (121) of the driving wheel (12) is fixedly connected to the inner ring of the bearing (3), and the wheel part II (222) of the driven wheel (22) is fixedly connected to the outer ring of the bearing (3).

7. The distributed coupling applied to a wind turbine according to claim 1, characterized in that, The driven wheel (22) has its shaft II (221) connected to the generator (5) via the generator shaft, and the driving wheel (12) has its wheel I (122) connected to the fan shaft via the fan flange (6).

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