CN219035454U

CN219035454U - Damping vibration attenuation device and blade

Info

Publication number: CN219035454U
Application number: CN202320075714.3U
Authority: CN
Inventors: 崔浩; 李琳; 钱赫; 唐波; 余清清; 陈梦萍; 李毅; 张皓
Original assignee: Zhejiang Windey Co Ltd
Current assignee: Zhejiang Windey Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-05-16
Anticipated expiration: 2033-01-10

Abstract

The application discloses damping vibration attenuation device and blade for to the blade body damping of fan, include: the damper is arranged on the supporting rod, the two supporting seats are respectively arranged at two ends of the supporting rod, the supporting rod is arranged between the two webs of the blade body, and the supporting seat is fixedly connected with the inner wall of the blade body. The damping vibration absorbing device provided by the utility model is arranged near the fatigue points of the blade body, can effectively eliminate the stress in the vibration direction near the blade body by vibration of the damper, is suitable for all fan blades, does not need to modify the blades, has simple structure, is convenient to install, has low production cost, and has good manufacturability and economy. The blade includes the blade body, is equipped with a plurality of webs in the blade body, two of blade body be equipped with damping damper between the web, damping damper can a plurality of installations, the combined action effectively reduces the vibration when blade load.

Description

Damping vibration attenuation device and blade

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a damping device and a blade.

Background

Wind power generation is to convert kinetic energy of wind into electric energy, wind energy is taken as a clean renewable energy source, and is increasingly valued in all countries of the world, along with continuous development of wind power generation, the longer the diameter of an impeller is, the larger the wind sweeping area is, the larger the generated energy is, the cost of wind power generation can be reduced, and therefore, the size of blades is also continuously increased. The weight increase of the blade is proportional to the cube of the length of the blade, the rapid lifting of the length of the blade means the rapid increase of the weight of the blade, and in order to reduce the weight of the blade, the blade material can develop to light weight, but as the weight of the blade becomes light, the blade can be unstable and flutter under the vibration coupling action of various stresses such as centrifugal force, inertial force, gravity, aerodynamic force and the like. When the blade moves, the blade vibration is great, and duration is long, lacks rigid support between upper and lower shell, and concentrated stress easily on the shell, stress can't release, can lead to appearing fatigue point, takes place fatigue crack, takes place fracture destruction even, reduces the life of blade and unit, leads to the output of wind wheel to reduce, and the generated energy reduces, and more serious can lead to taking place to sweep the tower accident.

In the prior art, wind turbine blades of viscoelastic damping material are proposed, wherein the damping material is a viscoelastic material, which is sandwiched between an outer bearing layer and an inner bearing layer, respectively. As the structure of the blade undergoes oscillatory bending, the viscoelastic material enters a shear state, expends energy through hysteresis, and provides a damping effect on the action of the structure. However, this method requires modification of the blade, and is complicated in structure and high in cost.

In summary, how to provide a damping device with good damping effect, simple structure and convenient installation is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present utility model is to provide a damping device, which can effectively alleviate local vibration and stress concentration, and has a simple structure and low cost.

In order to achieve the above object, the present utility model provides the following technical solutions:

a damping vibration attenuation device for damping vibration of a blade body of a wind turbine, comprising: the damper is arranged on the supporting rod, the two supporting seats are respectively arranged at two ends of the supporting rod, the supporting rod is arranged between the two webs of the blade body, and the supporting seat is fixedly connected with the inner wall of the blade body.

The damping device comprises a damping rod, a damping ring and a damping ball, wherein the damping ring is sleeved on the supporting rod, the damping rod is arranged on two sides of the supporting rod, one end of the damping rod is connected with the damping ring, and the other end of the damping rod is connected with the damping ball.

A thread is arranged at the connection position of the supporting rod and the damping ring, and first nuts are arranged at two ends of the damping ring and used for fixing the damper.

A damping device is provided with an elastic washer between the first nut and the end face of the damping ring.

A damping device is provided, wherein the supporting seat is adhered to the inner wall of the blade body and the damping ring is adhered to the first nut.

A damping device has a damping ball with a diameter larger than that of the supporting rod.

A damping device comprises a damping rod, a damping ring and a damping ball which are integrally formed.

The damping vibration attenuation device comprises a support rod, a support seat, a first nut, a second nut, a damping vibration attenuation device and a damping vibration attenuation device.

A damping device has a damper as an elastic member.

A blade comprises a blade body, wherein a plurality of webs are arranged in the blade body, and any one damping and shock-absorbing device is arranged between two webs of the blade body.

Compared with the background art, the damping device provided by the utility model is used for damping the blade body of the fan and comprises the following components: the damper is arranged on the supporting rod, the two supporting seats are respectively arranged at two ends of the supporting rod, the supporting rod is arranged between the two webs of the blade body, and the supporting seat is fixedly connected with the inner wall of the blade body. By adopting the damping device provided by the utility model, the stress in the vibration direction near the blade body can be effectively eliminated through the vibration of the damper when the damping device is installed near the fatigue point easily occurring on the blade body. Wherein, the rigid support bar is fixed between the inner walls of the blade body, can consolidate the support between two shells of the blade. The damping vibration attenuation device provided by the utility model is applicable to all fan blades, does not need to modify the blades, and has the advantages of simple structure, convenience in installation, low production cost, good manufacturability and economy.

In addition, the utility model also provides a blade, which comprises a blade body, wherein a plurality of webs are arranged in the blade body, and a damping device is arranged between the two webs of the blade body. The damping vibration absorbing device can be installed in a plurality of modes to act together, so that vibration of the blade during loading is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a damping device according to the present utility model mounted on a blade;

FIG. 2 is a block diagram of a damping device according to the present utility model;

FIG. 3 is a block diagram of a damper according to the present utility model;

wherein:

01-blade body, 011-web plate,

1-damper, 11-damping rod, 12-damping ring, 13-damping ball,

2-bracing piece, 3-supporting seat, 4-first nut, 5-second nut.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The present utility model will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present utility model.

The damping vibration attenuation device that this application provided for to the blade body 01 damping of fan, can refer to description figure 1 to figure 3, include: the damper comprises a damper 1, a supporting rod 2 and a supporting seat 3, wherein the damper 1 is arranged on the supporting rod 2, the supporting seat 3 is provided with two supporting rods, the two supporting rods are respectively arranged at two ends of the supporting rod 2, the supporting rod 2 is arranged between two webs 011 of the blade body 01, and the supporting seat 3 is fixedly connected with the inner wall of the blade body 01.

The damper 1 is a device for reducing mechanical vibration and dissipating kinetic energy by utilizing damping characteristics. The damping vibration absorbing device is arranged between two webs 011, is fixed in the inner walls of the upper shell and the lower shell of the blade body 01 through the rigid supporting rods 2, and the elastic damper 1 vibrates along with the vibration of the blade body 01, so that the vibration stress near the supporting seat 3 is dissipated through the vibration acting of the damper 1, the purpose of relieving material fatigue is achieved, and meanwhile, the supporting rods 2 can also play a role of rigidly connecting the upper shell and the lower shell of the blade body 01 and reinforcing the two shells. The damping device may be mounted on the blade body 01 in plurality together while reducing vibrations on the blade body 01.

As shown in fig. 1 of the specification, the damper 1 comprises a damping rod 11, a damping ring 12 and a damping ball 13, wherein the damping ring 12 is sleeved on the supporting rod 2, the damping rod 11 is arranged on two sides of the supporting rod 2, one end of the damping rod 11 is connected with the damping ring 12, and the other end of the damping rod 11 is connected with the damping ball 13. The length of the damper 1 is smaller than the distance between the two webs 011, and the damper 1 does not collide with the blade shell when vibrating. In order to improve the damping effect of the damper 1, the extension direction of the damper rod 11 is perpendicular to the main vibration direction of the blade body 01 after the damping device is installed.

As shown in fig. 2 of the specification, the connection position of the support rod 2 and the damping ring 12 is provided with threads, and both ends of the damping ring 12 are provided with first nuts 4, wherein the first nuts 4 are used for fixing the damper 1. After the damping ring 12 penetrates into the supporting rod 2, the two first nuts 4 are screwed in from two ends of the supporting rod 2 respectively and are screwed in the direction of the damping ring 12, so that two end faces of the damping ring 12 are tightly attached to the end faces of the first nuts 4, the positions of the damping ring 12 are fixed through the first nuts 4, and the positions of the damping ring 12 along the length direction of the supporting rod 2 in the range of the rotation movement of the first nuts 4 can be adjusted. According to practical requirements, the upper and lower planes of the damping ring 12 can be curved, planar, and serrated, in addition, the connection mode of the damper 1 and the supporting rod 2 can be various, and the damper can also be in buckle connection, etc., which is not limited herein.

An elastic washer is optionally arranged between the first nut 4 and the end face of the damping ring 12. The arrangement of the elastic washer can facilitate the first nut 4 to fix the damping ring 12, and meanwhile, the elastic washer can absorb the kinetic energy of vibration, so that the damping effect is improved.

The support seat 3 is adhered to the inner wall of the blade body 01, and the damping ring 12 is adhered to the first nut 4. In order to improve the fixing effect between the damping device and the inner wall of the blade body 01 and between the damping ring 12 and the first nut 4, the inner wall of the blade body 01 and the damping ring 12 and the first nut 4 can be further bonded by using glue after being fixed, so that the stability of the damping device is improved.

The diameter of the damping ball 13 is larger than the diameter of the support rod 2. The diameter of the damping ball 13 is larger than the diameter of the section of the support rod 2, so that vibration of the damper 1 is facilitated, the vibration amplitude of the damper 1 is increased, after the vibration on the blade body 01 is transmitted to the damper 1, the vibration of the damper 1 can be accelerated to consume energy, and the specific size of the damping ball 13 is set according to actual requirements. The damping ball 13 may also be a cube, cone, cylinder, truncated cone, ring, etc.

The damping rod 11, the damping ring 12 and the damping ball 13 are all integrally formed. The integrated structural design can effectively avoid the defect of concentrated external force or internal stress, so that the damper 1 is stable and durable, and in addition, the integrated forming can reduce the cost and is convenient to install.

Both ends of the supporting rod 2 are provided with threads, both ends of the supporting rod 2 are also provided with second nuts 5, the supporting seats 3 are respectively sleeved at both ends of the supporting rod 2, and the second nuts 5 are contacted with and fix the supporting seats 3. Taking the supporting seat 3 in fig. 2 as an example, the supporting seat 3 is in a hollow round table shape, one end of the supporting seat 3 with smaller diameter is inserted into the supporting rod 2, the supporting rod 2 is sleeved with the second nut 5, the second nut 5 is arranged on the end face of one end of the supporting seat 3 with smaller diameter, the second nut 5 rotates towards the end of the supporting rod 2, and the supporting seat 3 is tightly pressed on the inner wall of the blade body 01 after screwing.

The damper 1 is provided as an elastic member. The elastic member is made of an elastic material, which can facilitate vibration of the damper 1, and may be specifically made of other elastic materials such as TPU (Thermoplastic polyurethanes), PVC (Polyvinyl chloride), silicone rubber, and the like.

As shown in the attached figure 1 of the specification, the application further provides a blade, which comprises a blade body 01, wherein a plurality of webs 011 are arranged in the blade body 01, any one damping and shock absorbing device is arranged between the two webs 011 of the blade body 01, the damping and shock absorbing device can reduce vibration when the blade is loaded, and the safety and the service life of the blade are improved.

It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The damping device provided by the application is described above in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims

1. Damping vibration attenuation device for to blade body (01) vibration attenuation of fan, characterized in that includes: the novel blade comprises a damper (1), a supporting rod (2) and a supporting seat (3), wherein the damper (1) is arranged on the supporting rod (2), the supporting seat (3) is provided with two supporting rods which are respectively arranged at two ends of the supporting rod (2), the supporting rod (2) is arranged between two webs (011) of the blade body (01), and the supporting seat (3) is fixedly connected with the inner wall of the blade body (01).

2. Damping device according to claim 1, characterized in that the damper (1) comprises a damping rod (11), a damping ring (12) and a damping ball (13), the damping ring (12) is sleeved on the support rod (2), the damping rod (11) is arranged on two sides of the support rod (2), one end of the damping rod (11) is connected with the damping ring (12), and the other end of the damping rod (11) is connected with the damping ball (13).

3. Damping device according to claim 2, characterized in that the position of the support rod (2) connected with the damping ring (12) is provided with threads, both ends of the damping ring (12) are provided with first nuts (4), and the first nuts (4) are used for fixing the damper (1).

4. A damping device according to claim 3, characterized in that an elastic washer is optionally provided between the first nut (4) and the end face of the damping ring (12).

5. A damping device according to claim 3, characterized in that the support seat (3) is glued to the inner wall of the blade body (01) and the damping ring (12) is glued to the first nut (4).

6. Damping device according to claim 2, characterized in that the diameter of the damping ball (13) is larger than the diameter of the support rod (2).

7. Damping device according to claim 2, characterized in that the damping rod (11), the damping ring (12) and the damping ball (13) are all integrally formed.

8. The damping vibration attenuation device according to claim 1, wherein both ends of the supporting rod (2) are provided with threads, both ends of the supporting rod (2) are further provided with second nuts (5), the supporting seats (3) are respectively sleeved at both ends of the supporting rod (2), and the second nuts (5) are in contact with and fix the supporting seats (3).

9. Damping device according to claim 1, characterized in that the damper (1) is provided as an elastic element.

10. A blade comprising a blade body (01), wherein a plurality of webs (011) are arranged in the blade body (01), and the damping and shock absorbing device according to any one of claims 1-9 is arranged between two webs (011) of the blade body (01).