CN114017253B

CN114017253B - Wind driven generator blade damping device

Info

Publication number: CN114017253B
Application number: CN202111306190.6A
Authority: CN
Inventors: 庞帅; 张婷; 刘敬
Original assignee: Binzhou University
Current assignee: Chongqing Science City Intellectual Property Operation Center Co ltd; Shaanxi Yuneng Kerui Electric Power Engineering Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2023-03-31
Anticipated expiration: 2041-11-05
Also published as: CN114017253A

Abstract

The invention discloses a blade damping device of a wind driven generator, which comprises a tower, a generator box body and blades, wherein the generator box body is installed on the top surface of the tower, a first rotating shaft is fixedly connected to the output end of the generator box body, a circular fixing plate is fixed at the end part of the first rotating shaft, a sleeve is fixed on the other side surface of the circular fixing plate, a second rotating shaft matched with the sleeve is arranged in the sleeve in a sliding manner, the other end of the second rotating shaft is fixedly connected with an installation block, and a third rotating shaft is fixedly connected to the other side surface of the installation block. The invention is designed with a rubber shock absorption block and a composite spring for buffering and absorbing the second rotating shaft in operation, is provided with a plurality of groups of stretching shock absorption strips for stabilizing the middle parts and the root parts of the two sides of the blade, and adjusts the angles of the stretching shock absorption strips for stretching the blade through the first guide rail assembly and the second guide rail assembly to improve the buffering and shock absorption effects, enhance the stability and the service life of the operation of the wind turbine generator, and reduce the risk of damaging a generator case or a tower barrel by impact.

Description

Wind driven generator blade damping device

Technical Field

The invention relates to the field of wind power generation, in particular to a blade damping device of a wind driven generator.

Background

Wind energy is green renewable energy, and the development of wind power has important significance for relieving the energy demand of China. However, in wind power generation, because the blade of the wind generating set is in a harsh environment, the blade of the traditional wind power generator has no damping function, when the wind blows by force, the actual operation load of the blade exceeds the prediction limit, the blade can be damaged and broken due to overload, particularly, the root part and the middle part of the blade are easy to break and lose effectiveness due to the small cross-sectional area caused by the design defects, and at the moment of blade breakage, the blade can easily collide with a generator case or a tower drum to cause continuous damage, so that the accident influence area is increased, therefore, the damping function on the blade of the wind power generator needs to be increased, and the safety and the reliability of the wind power generator are improved.

Disclosure of Invention

In order to solve the existing problems, the invention provides a wind driven generator blade damping device.

The invention is realized by the following technical scheme:

a wind driven generator blade damping device comprises a tower, a generator box and blades, wherein the generator box is installed on the top surface of the tower, a first rotating shaft is fixedly connected to the output end of the generator box, a circular fixing plate is fixed to the end of the first rotating shaft, a sleeve is fixed to the other side surface of the circular fixing plate, a second rotating shaft matched with the sleeve is arranged in the sleeve in a sliding mode, an installation block is fixedly connected to the other end of the second rotating shaft, a third rotating shaft is fixedly connected to the other side surface of the installation block, a plurality of blades are fixedly installed on the installation block, a first annular supporting plate is fixed to the upper portion of the side surface of the tower and sleeved outside the tower, a first arc-shaped guide rail is fixedly installed on the top surface of the first annular supporting plate and sleeved outside the tower, a plurality of first sliding blocks matched with the first arc-shaped guide rail are arranged on the top surface of the first arc-shaped guide rail in a sliding mode, a first annular fixing plate is fixed on the first sliding block, the first annular fixing plate is sleeved outside the tower drum and is rotationally connected with the tower drum, a first supporting cylinder is fixedly welded between the top surface of the first annular fixing plate and the bottom surface of the generator box body, the first supporting cylinder is sleeved outside the tower drum, a first protective cylinder matched with the first annular fixing plate is fixed on the outer ring surface of the first annular fixing plate, a supporting plate is fixedly welded on the side surface of the first supporting cylinder along the length direction of a first rotating shaft, a plurality of rib plates are fixed at the joint of the first supporting cylinder and the supporting plate, a linear guide rail is fixed on the top surface of the supporting plate, a second sliding block matched with the linear guide rail is arranged on the linear guide rail in a sliding manner, a second supporting cylinder is sleeved outside the second rotating shaft, and a supporting seat is fixed on the bottom surface of the second supporting cylinder, the bottom surface of the supporting seat is fixed with the top surface of the second sliding block, the inner ring surface of the second supporting cylinder is symmetrically fixed with a second annular fixing plate, the inner side surface of the second annular fixing plate is respectively and fixedly provided with a second arc-shaped guide rail, a plurality of third sliding blocks are arranged on the second arc-shaped guide rail in a sliding manner, the second supporting cylinder is internally and rotatably connected with a third annular fixing plate, the two side surfaces of the third annular fixing plate are respectively fixed with the third sliding blocks on the two second arc-shaped guide rails, a fourth annular fixing plate matched with the second rotating shaft is fixed outside the second rotating shaft, the fourth annular fixing plate is sleeved outside the second rotating shaft, a plurality of rubber shock absorbing blocks are uniformly fixed between the fourth annular fixing plate and the third annular fixing plate, and a first limiting ring and a second limiting ring matched with the rubber shock absorbing blocks are sleeved at the two ends of the rubber shock absorbing blocks, the side face of the first limiting ring is welded and fixed with the inner ring face of the third annular fixing plate, the side face of the second limiting ring is welded and fixed with the outer ring face of the fourth annular fixing plate, the inner wall of the sleeve is fixedly provided with a circular fixing block matched with the inner wall of the sleeve, a sliding block matched with the inner wall of the sleeve is arranged in the sleeve in a sliding mode, the side face of the circular fixing block is uniformly provided with a plurality of first through holes, sliding rods matched with the first through holes are arranged in the first through holes in a sliding mode, one end of each sliding rod is fixed with the side face of the second rotating shaft, the other end of each sliding rod is fixed with the side face of the sliding block, a composite spring is fixed between each sliding block and the circular fixing plate, the third rotating shaft is provided with a first blade damping assembly, each first blade damping assembly comprises a first guide rail assembly and a plurality of groups of stretching damping strips, each first guide rail assembly comprises a circular cover plate, each second limiting ring and a plurality of stretching damping strips, and each guide rail assembly comprises a plurality of stretching damping strips, each guide rail assembly, the third arc-shaped guide rail, the fourth slide block, the bolt, the first protective net cylinder and the annular cover plate are fixed to the end portion of the third rotating shaft, the third arc-shaped guide rail is fixedly installed on the side face of the circular cover plate and sleeved outside the third rotating shaft, a plurality of fourth slide blocks matched with the third arc-shaped guide rail are arranged on the third arc-shaped guide rail in a sliding mode, the bolts are connected to the fourth slide blocks in a threaded mode, the first protective net cylinder is fixed to the outer annular face of the circular cover plate, the annular cover plate matched with the first protective net cylinder is fixed to the side face of the first protective net cylinder, the stretching damping strips are fixed to the fourth slide blocks, the other ends of the stretching damping strips penetrate out of a center hole of the annular cover plate, and each stretching damping strip comprises a box body, a rubber sheet, a spiral steel wire rope, a steel wire rope closed rope joint, a stretching spring, a first triangular fixing block, a second triangular fixing block, a rubber block and a corrugated pipe protecting sleeve, the two side surfaces of the corrugated pipe protecting sleeve are respectively fixed with a box body, the side surfaces of the box body are respectively provided with an opening, the openings are communicated with the interior of the corrugated pipe protecting sleeve, the openings of the box body are respectively stuck and fixed with a rubber sheet matched with the openings, the rubber sheets are respectively provided with a plurality of second through holes, the interior of the corrugated pipe protecting sleeve is provided with a plurality of spiral steel wire ropes with the same number as the second through holes, the two ends of each spiral steel wire rope respectively extend into the two box bodies through the second through holes on the two rubber sheets, the two ends of each spiral steel wire rope are respectively provided with a steel wire rope closed socket matched with the two ends of each spiral steel wire rope, the steel wire rope closed sockets at the end parts of the spiral steel wire ropes are respectively and fixedly connected with the inner wall of the box body through stretching springs, the side surface of one box body is respectively fixed with a first triangular fixing block, and the side surface of the other box body is respectively fixed with a second triangular fixing block, the first triangular fixing blocks are all fixed with the fourth sliding block, the side face of the second triangular fixing block is fixed with a rubber block, the rubber block is fixedly adhered to one side face of the blade, a rotating shaft protecting sleeve is arranged between the mounting block and the first guide rail assembly and is sleeved outside the third rotating shaft, the rotating shaft protecting sleeve comprises a second protecting net cylinder and a rubber cylinder, the two sides of the second protecting net cylinder are fixedly adhered to the rubber cylinder matched with the second protecting net cylinder respectively, one rubber cylinder extends into the first protecting net cylinder of the first guide rail assembly and is fixed with the fourth sliding block inside the first guide rail assembly, the other rubber cylinder is fixed with the mounting block, a second blade damping assembly is mounted on the second rotating shaft and comprises a second guide rail assembly and a plurality of groups of stretching damping strips, the second guide rail assembly comprises a second annular supporting plate, a third arc guide rail, a fourth sliding block, a bolt, a first net cylinder and an annular cover plate, the end parts of the second annular supporting plate and the second rotating shaft are fixed, a third arc-shaped guide rail is fixedly mounted on the side surface of the second annular supporting plate and sleeved outside the second rotating shaft, a plurality of fourth sliding blocks matched with the third arc-shaped guide rail are arranged on the third arc-shaped guide rail in a sliding mode, bolts are connected to the fourth sliding blocks in a threaded mode, a first protective net cylinder is fixed to the outer annular surface of the second annular supporting plate, an annular cover plate matched with the first protective net cylinder is fixed to the side surface of the first protective net cylinder, stretching damping strips are fixed to the fourth sliding blocks, the other ends of the stretching damping strips penetrate out of a center hole of the annular cover plate, and each stretching damping strip comprises a box body, a rubber sheet, a spiral steel wire rope, a steel wire rope closed rope joint, a stretching spring, a first triangular fixing block, a second triangular fixing block and a third guide rail, the two side faces of the corrugated pipe protecting sleeve are respectively fixed with a box body, the side faces of the box body are respectively provided with an opening, the opening is communicated with the inside of the corrugated pipe protecting sleeve, rubber sheets matched with the opening are fixedly adhered to the opening of the box body, a plurality of second through holes are formed in the rubber sheets, a plurality of spiral steel wire ropes with the same number as the second through holes are arranged in the corrugated pipe protecting sleeve, the two ends of each spiral steel wire rope respectively extend into the two box bodies through the second through holes in the two rubber sheets, the two ends of each spiral steel wire rope are respectively provided with steel wire rope closed rope sections matched with the spiral steel wire ropes, the steel wire rope closed rope sections at the ends of the spiral steel wire ropes are fixedly connected with the inner wall of the box body through extension springs, the side face of one box body is respectively fixed with a first triangular fixing block, the side face of the other box body is respectively fixed with a second triangular fixing block, the rubber blocks are fixedly adhered to the side faces of blades, a rotating shaft is arranged between the mounting block and the second guide rail assembly, the rotating shaft is sleeved on the second protective sleeve, the outer side face of the second protective sleeve is fixedly adhered with a cylinder, and the cylindrical rubber cylinder protective sleeve is fixed with the cylindrical protective sleeve, and the cylindrical protective sleeve.

Preferably, the first supporting cylinder, the supporting plate and the rib plate are fixed by welding, the cross section of the inner ring surface of the third annular fixing plate is octagonal, the cross section of the outer ring surface of the fourth annular fixing plate is octagonal, the fourth annular fixing plate is arranged inside the third annular fixing plate, eight tangent planes of the outer ring surface of the fourth annular fixing plate are aligned with eight tangent planes of the inner ring surface of the third annular fixing plate, the rubber damper block is fixed with the third annular fixing plate or the fourth annular fixing plate by sticking, the first through hole is hexagonal, and the first protective net cylinder is made of stainless steel.

Preferably, the number of the tensile damping strips of the first blade damping assembly or the second blade damping assembly is two times that of the blade, a pair of tensile damping strips are respectively adhered and fixed to two side surfaces of the blade, each pair of tensile damping strips are respectively adhered to the middle part and the root part of the blade, the number of the fourth sliding blocks of the first blade damping assembly is the same as that of the tensile damping strips thereon, and the number of the fourth sliding blocks of the second blade damping assembly is the same as that of the tensile damping strips thereon.

Preferably, the first rotating shaft, the sleeve, the second rotating shaft, the mounting block, the third rotating shaft and the second supporting cylinder are identical in central line, the linear guide rail is parallel to the second rotating shaft, and the second rotating shaft and the sliding block are respectively located on two sides of the circular fixing block.

Compared with the prior art, the invention has the beneficial effects that: the invention is designed with a rubber shock absorption block and a composite spring for buffering and absorbing the second rotating shaft in operation, is provided with a plurality of groups of stretching shock absorption strips for stabilizing the middle parts and the root parts of the two sides of the blade, and adjusts the angle of the stretching shock absorption strips for stretching the blade through the first guide rail assembly and the second guide rail assembly to improve the buffering and shock absorption effect, enhance the stability and the service life of the operation of the wind turbine generator, and reduce the risk of damaging a generator case or a tower barrel by impact.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a left side view of the structure of the present invention;

FIG. 3 isbase:Sub>A view A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic illustration of the operation of FIG. 3 according to the present invention;

FIG. 5 is a view B-B of FIG. 3 according to the present invention;

FIG. 6 is a view C-C of FIG. 3 according to the present invention;

FIG. 7 is an enlarged schematic view at D of FIG. 3 in accordance with the present invention;

FIG. 8 is a schematic structural view of the structural stretch damper strip of the present invention.

In the figure: <xnotran> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 30-1, 46-1, 47-1. </xnotran>

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

as shown in fig. 1 to 8, a wind turbine blade damping device includes a tower 1, a generator housing 2 and blades 9, the generator housing 2 is mounted on the top surface of the tower 1, a first rotating shaft 3 is fixedly connected to an output end of the generator housing 2, a circular fixing plate 4 is fixed to an end of the first rotating shaft 3, a sleeve 5 is fixed to the other side surface of the circular fixing plate 4, a second rotating shaft 6 matched with the sleeve 5 is slidably mounted in the sleeve 5, a mounting block 7 is fixedly connected to the other end of the second rotating shaft 6, a third rotating shaft 8 is fixedly connected to the other side surface of the mounting block 7, a plurality of blades 9 are fixedly mounted on the mounting block 7, a first annular support plate 10 is fixed to the upper portion of the side surface of the tower 1, the first annular support plate 10 is sleeved on the outside of the tower 1, a first circular guide rail 11 is fixedly mounted on the top surface of the first annular support plate 10, the first circular guide rail 11 is sleeved on the outside the tower 1, a plurality of first sliding blocks 12 matched with the top surface of the first circular guide rail 11 are slidably mounted on the top surface of the first circular guide rail, a first circular guide rail 12 is fixedly sleeved on the top surface of the first circular guide rail 12, a first circular fixing plate 13 is fixedly connected to a first rotating support plate 14, a first rotating support plate 14 is welded to the first rotating support plate 14, a first rotating support plate 14 fixed to the first rotating shaft support plate 14, a first circular support plate 14 is welded to the first rotating support plate 14, the linear guide rail 18 is provided with a second sliding block 19 matched with the linear guide rail, a second supporting cylinder 20 is sleeved outside the second rotating shaft 6, a supporting seat 21 is fixed on the bottom surface of the second supporting cylinder 20, the bottom surface of the supporting seat 21 is fixed on the top surface of the second sliding block 19, a second annular fixing plate 22 is symmetrically fixed on the inner annular surface of the second supporting cylinder 20, second circular arc-shaped guide rails 23 are respectively and fixedly installed on the inner side surface of the second annular fixing plate 22, a plurality of third sliding blocks 24 are respectively and slidably arranged on the second circular arc-shaped guide rails 23, a third annular fixing plate 25 is rotatably connected inside the second supporting cylinder 20, two side surfaces of the third annular fixing plate 25 are respectively fixed on the third sliding blocks 24 on the two second circular arc-shaped guide rails 23, and a fourth annular fixing plate 26 matched with the second rotating shaft 6 is fixed outside the second rotating shaft, a fourth annular fixing plate 26 is sleeved outside the second rotating shaft 6, a plurality of rubber shock-absorbing blocks 27 are uniformly fixed between the fourth annular fixing plate 26 and the third annular fixing plate 25, a first limiting ring 28 and a second limiting ring 29 matched with the rubber shock-absorbing blocks 27 are sleeved at two ends of each rubber shock-absorbing block 27, the side surface of the first limiting ring 28 is welded and fixed with the inner annular surface of the third annular fixing plate 25, the side surface of the second limiting ring 29 is welded and fixed with the outer annular surface of the fourth annular fixing plate 26, a round fixing block 30 matched with the inner wall of the sleeve 5 is fixed on the inner wall of the sleeve 5, a sliding block 31 matched with the sleeve 5 is arranged in the sleeve 5 in a sliding manner, a plurality of first through holes 30-1 are uniformly arranged on the side surface of the round fixing block 30, a sliding rod 32 matched with the first through holes 30-1 is arranged in a sliding manner, and one end of the sliding rod 32 is fixed with the side surface of the second rotating shaft 6, the other end of the slide rod 32 is fixed with the side surface of the slide block 31, a compound spring 33 is fixed between the slide block 31 and the circular fixing plate 4, a first blade damping assembly 34 is installed on the third rotating shaft 8, the first blade damping assembly 34 comprises a first guide rail assembly 36 and a plurality of groups of stretching damping strips 37, the first guide rail assembly 36 comprises a circular cover plate 39, a third arc-shaped guide rail 40, a fourth slide block 41, a bolt 42, a first protection net cylinder 43 and an annular cover plate 44, the circular cover plate 39 is fixed with the end part of the third rotating shaft 8, the side surface of the circular cover plate 39 is fixedly provided with the third arc-shaped guide rail 40, the third arc-shaped guide rail 40 is sleeved outside the third rotating shaft 8, the third arc-shaped guide rail 40 is provided with a plurality of fourth slide blocks 41 matched with the third arc-shaped guide rail 40 in a sliding manner, and the fourth slide block 41 is connected with the bolt 42 in a threaded manner, a first protective net cylinder 43 is fixed on the outer annular surface of the circular cover plate 39, an annular cover plate 44 matched with the first protective net cylinder 43 is fixed on the side surface of the first protective net cylinder 43, tensile damping strips 37 are fixed on the fourth sliding blocks 41, the other ends of the tensile damping strips 37 penetrate through the central hole of the annular cover plate 44, each tensile damping strip 37 comprises a box body 46, a rubber sheet 47, a spiral steel wire rope 48, a steel wire rope closed socket 49, a tensile spring 50, a first triangular fixing block 51, a second triangular fixing block 52, a rubber block 53 and a corrugated pipe protective sleeve 54, the box bodies 46 are fixed on the two side surfaces of the corrugated pipe protective sleeve 54 respectively, openings 46-1 are formed in the side surfaces of the box bodies 46, the openings 46-1 are communicated with the interior of the corrugated pipe protective sleeve 54, the rubber sheets 47 matched with the openings 46-1 of the box bodies 46 are adhered and fixed, the rubber sheets 47 are respectively provided with a plurality of second through holes 47-1, the bellows protective sleeve 54 is internally provided with a plurality of spiral steel wire ropes 48 with the same number as the second through holes 47-1, two ends of each spiral steel wire rope 48 respectively extend into the two box bodies 46 through the second through holes 47-1 on the two rubber sheets 47, two ends of each spiral steel wire rope 48 are respectively provided with a steel wire rope closed socket 49 matched with the two ends of each spiral steel wire rope 48, the steel wire rope closed socket 49 at the end part of each spiral steel wire rope 48 is fixedly connected with the inner wall of each box body 46 through a tension spring 50, the side surface of one box body 46 is respectively fixed with a first triangular fixed block 51, the side surface of the other box body 46 is respectively fixed with a second triangular fixed block 52, each first triangular fixed block 51 is fixed with the fourth sliding block 41, the side surface of each second triangular fixed block 52 is fixed with a rubber block 53, and the rubber block 53 is fixedly adhered to one side surface of the blade 9, a rotating shaft protecting sleeve 55 is arranged between the mounting block 7 and the first guide rail assembly 36, the rotating shaft protecting sleeve 55 is sleeved outside the third rotating shaft 8, the rotating shaft protecting sleeve 55 comprises a second protecting net cylinder 56 and a rubber cylinder 57, the two sides of the second protecting net cylinder 56 are respectively fixedly adhered with the rubber cylinders 57 matched with the second protecting net cylinder 56, one rubber cylinder 57 extends into the first protecting net cylinder 43 of the first guide rail assembly 36 and is fixed with a fourth sliding block 41 inside the first protecting net cylinder, the other rubber cylinder 57 is fixed with the mounting block 7, a second blade damping assembly 35 is mounted on the second rotating shaft 6, the second blade damping assembly 35 comprises a second guide rail assembly 38 and a plurality of groups of stretching damping strips 37, and the second guide rail assembly 38 comprises a second annular supporting plate 45, a third arc-shaped guide rail 40, a fourth sliding block 41, bolts 42, A first protective net cylinder 43 and an annular cover plate 44, wherein the second annular support plate 45 is fixed to the end of the second rotating shaft 6, a third arc-shaped guide rail 40 is fixedly installed on the side surface of the second annular support plate 45, the third arc-shaped guide rail 40 is sleeved outside the second rotating shaft 6, a plurality of fourth sliding blocks 41 matched with the third arc-shaped guide rail 40 are arranged on the third arc-shaped guide rail 40 in a sliding manner, bolts 42 are connected to the fourth sliding blocks 41 in a threaded manner, a first protective net cylinder 43 is fixed to the outer annular surface of the second annular support plate 45, the annular cover plate 44 matched with the first protective net cylinder 43 is fixed to the side surface of the first protective net cylinder 43, tensile shock-absorbing bars 37 are fixed to the fourth sliding blocks 41, and the other ends of the tensile shock-absorbing bars 37 penetrate through the central hole of the annular cover plate 44, the tensile damping strip 37 comprises a box body 46, rubber sheets 47, spiral steel wire ropes 48, steel wire rope closed socket joints 49, a tensile spring 50, a first triangular fixed block 51, a second triangular fixed block 52, a rubber block 53 and a corrugated pipe protecting sleeve 54, the box body 46 is respectively fixed on two side surfaces of the corrugated pipe protecting sleeve 54, openings 46-1 are respectively arranged on the side surfaces of the box body 46, the openings 46-1 are communicated with the interior of the corrugated pipe protecting sleeve 54, the rubber sheets 47 matched with the openings 46-1 are respectively fixed at the positions of the openings 46-1 of the box body 46 in a sticking manner, a plurality of second through holes 47-1 are respectively arranged on the rubber sheets 47, a plurality of spiral steel wire ropes 48 with the same number as the second through holes 47-1 are arranged inside the corrugated pipe protecting sleeve 54, two ends of the spiral steel wire ropes 48 respectively extend into the two box bodies 46 through the second through holes 47-1 on the two rubber sheets 47, the steel wire ropes 48 are respectively provided with the steel wire rope closed socket joints 49 matched with the two ends, the steel wire rope closed cable joints 49 at the end parts of the spiral steel wire ropes 48 are fixedly connected with the inner walls of the box bodies 46 through extension springs 50, first triangular fixing blocks 51 are fixed on the side surfaces of one box body 46, second triangular fixing blocks 52 are fixed on the side surfaces of the other box body 46, the first triangular fixing blocks 51 are fixed with the fourth sliding blocks 41, rubber blocks 53 are fixed on the side surfaces of the second triangular fixing blocks 52, the rubber blocks 53 are fixedly adhered with the other side surfaces of the blades 9, a rotating shaft protecting sleeve 55 is arranged between the mounting block 7 and the second guide rail assembly 38, the rotating shaft protecting sleeve 55 is sleeved outside the second rotating shaft 6, the rotating shaft protecting sleeve 55 comprises a second protecting net cylinder 56 and a rubber cylinder 57, rubber cylinders 57 matched with the second protecting net cylinder 56 are fixedly adhered to the two sides of the second protecting net cylinder 56, one rubber cylinder 57 extends into the first protecting net cylinder 43 of the second guide rail assembly 38 and is fixed with the fourth sliding block 41 inside the second protecting net cylinder, and the other rubber cylinder 57 is fixed with the mounting block 7. The first supporting cylinder 14, the supporting plate 16 and the rib plate 17 are fixed by welding, the cross section of the inner annular surface of the third annular fixing plate 25 is octagonal, the cross section of the outer annular surface of the fourth annular fixing plate 26 is octagonal, the fourth annular fixing plate 26 is arranged inside the third annular fixing plate 25, eight tangent planes of the outer annular surface of the fourth annular fixing plate 26 are aligned with eight tangent planes of the inner annular surface of the third annular fixing plate 25, the rubber damper 27 is fixed with the third annular fixing plate 25 or the fourth annular fixing plate 26 by adhesion, the first through hole 30-1 is hexagonal, and the first protective net cylinder 43 is made of stainless steel. The number of the tensile damping strips 37 of the first blade damping assembly 34 or the second blade damping assembly 35 is twice that of the blades 9, a pair of tensile damping strips 37 are respectively adhered and fixed to two side surfaces of each blade 9, each pair of tensile damping strips 37 are respectively adhered to the middle part and the root part of each blade 9, the number of the fourth sliding blocks 41 of the first blade damping assembly 34 is the same as that of the tensile damping strips 37 thereon, and the number of the fourth sliding blocks 41 of the second blade damping assembly 35 is the same as that of the tensile damping strips 37 thereon. The central lines of the first rotating shaft 3, the sleeve 5, the second rotating shaft 6, the mounting block 7, the third rotating shaft 8 and the second supporting cylinder 20 are all the same, the linear guide rail 18 and the second rotating shaft 6 are parallel to each other, and the second rotating shaft 6 and the sliding block 31 are respectively positioned on two sides of the circular fixing block 30.

The working principle is as follows: when the invention works, the top surface of a tower barrel 1 is provided with a generator box body 2, the output end of the generator box body 2 is fixedly connected with a first rotating shaft 3, the end part of the first rotating shaft 3 is fixedly provided with a circular fixing plate 4, the other side surface of the circular fixing plate 4 is fixedly provided with a sleeve 5, the sleeve 5 is internally provided with a second rotating shaft 6 matched with the sleeve in a sliding way, the other end of the second rotating shaft 6 is fixedly connected with a mounting block 7, the other side surface of the mounting block 7 is fixedly connected with a third rotating shaft 8, the mounting block 7 is fixedly provided with a plurality of blades 9, the inner wall of the sleeve 5 is fixedly provided with a circular fixing block 30 matched with the sleeve 5, the sleeve 5 is internally provided with a sliding block 31 matched with the sleeve in a sliding way, the side surface of the circular fixing block 30 is uniformly provided with a plurality of first through holes 30-1, and sliding rods 32 matched with the first through holes 30-1 are all slidably arranged in the first through holes 30-1, one end of the sliding rod 32 is fixed to the side of the second rotating shaft 6, the other end of the sliding rod 32 is fixed to the side of the sliding block 31, when the blade 9 on the mounting block 7 is blown by external wind to rotate, the central lines of the first rotating shaft 3, the sleeve 5, the second rotating shaft 6, the mounting block 7, the third rotating shaft 8 and the second supporting cylinder 20 are the same, the components connected to the mounting block 7 rotate synchronously with the components, when the wind speed is high, as shown in fig. 4, the second rotating shaft 6 can slide inside the sleeve 5, and can drive the sliding rod 32 and the sliding block 31 which are fixedly connected with the second rotating shaft 32 and the sliding block 31 to slide when the second rotating shaft 6 and the third rotating shaft 6 slide, and the components inside the generator box 2 which is connected with the first rotating shaft 3 to slide, and the composite spring 33 fixed between the sliding block 31 and the circular fixing plate 4 plays a role in buffering and damping for the second rotating shaft 6, the third rotating shaft 8 and the components inside the generator box 2 which is connected with the first rotating shaft 3, so that the service life of the wind turbine generator set is prolonged.

A second annular fixing plate 22 is symmetrically fixed to an inner annular surface of an arranged second supporting cylinder 20, a second circular arc-shaped guide rail 23 is fixedly installed on an inner side surface of the second annular fixing plate 22, a plurality of third sliding blocks 24 are arranged on the second circular arc-shaped guide rail 23 in a sliding mode, a third annular fixing plate 25 is rotatably connected to the inside of the second supporting cylinder 20, two side surfaces of the third annular fixing plate 25 are fixed to the third sliding blocks 24 on the two second circular arc-shaped guide rails 23, a fourth annular fixing plate 26 matched with the second rotating shaft 6 is fixed to the outside of the second rotating shaft 6, a plurality of rubber damping blocks 27 are uniformly fixed between the fourth annular fixing plate 26 and the third annular fixing plate 25, the section of the inner annular surface of the third annular fixing plate 25 is octagonal, the section of the outer annular surface of the fourth annular fixing plate 26 is octagonal, the fourth annular fixing plate 26 is arranged inside the third annular fixing plate 25, the eight sections of the fourth annular fixing plate 26 are aligned to the eight sections of the inner annular fixing plate 25 of the third annular fixing plate 25, so that the two ends of the rubber damping blocks 27 are more firmly adhered to the outer annular fixing plate 25 or the outer annular fixing plate 26 of the second annular fixing plate 9, and the outer annular damping elements of the wind turbine generator set are connected with the damping elements and the damping elements 9.

The third rotating shaft 8 is provided with a first blade damping assembly 34, the first blade damping assembly 34 comprises a first guide rail assembly 36 and a plurality of groups of stretching damping strips 37, the stretching damping strips 37 are fixedly adhered to one side surface of the blade 9, the second rotating shaft 6 is provided with a second blade damping assembly 35, the second blade damping assembly 35 comprises a second guide rail assembly 38 and a plurality of groups of stretching damping strips 37, the stretching damping strips 37 are fixedly adhered to the other side surface of the blade 9, and the number of the stretching damping strips 37 of the first blade damping assembly 34 or the second blade damping assembly 35 is twice that of the blade 9, so that a pair of stretching damping strips 37 are respectively fixedly adhered to both side surfaces of each blade 9, each pair of stretching damping strips 37 are respectively adhered to the middle part and the root part of the blade 9, the stretching damping strips 37 on both sides of the blade 9 can be pulled to stabilize the blade 9 in the shock generated by strong wind force when the blade 9 is subjected to shock, a good damping effect is achieved, particularly, the stretching damping strips 37 are respectively adhered to the middle part and the root part of the blade 9 where the blade 9 is broken, the damping effect is enhanced, and the damping effect is reduced when the blade 9 is broken in the case, and the risk of the case is reduced.

The first guide rail assembly 36 of the first blade damping assembly 34 comprises a circular cover plate 39, a third arc-shaped guide rail 40, a fourth slider 41, a bolt 42, a first protective net cylinder 43 and an annular cover plate 44, the circular cover plate 39 is fixed to the end of the third rotating shaft 8, the third arc-shaped guide rail 40 is fixedly installed on the side surface of the circular cover plate 39, the third arc-shaped guide rail 40 is sleeved outside the third rotating shaft 8, the third arc-shaped guide rail 40 is provided with a plurality of fourth sliders 41 matched with the third arc-shaped guide rail in a sliding mode, the fourth sliders 41 are in threaded connection with the bolts 42, the first protective net cylinder 43 is fixed to the outer ring surface of the circular cover plate 39, the annular cover plate 44 matched with the first protective net cylinder 43 is fixed to the side surface of the first protective net cylinder 43, the stretching damping bars 37 are fixed to the fourth sliders 41, the number of the fourth sliders 41 of the first blade damping assembly 34 is the same as the number of the stretching damping bars 37, the bolts 42 on the fourth slider 41 fixedly connected with the stretching damping bars 37 to be adjusted are unscrewed, and the angle of the stretching damping bars 9 at the position of the third arc-shaped guide rail 40 can be adjusted by adjusting the fourth slider 41; similarly, the second rail assembly 38 of the second vane shock absorbing assembly 35 includes a second annular support plate 45, a third arc-shaped guide rail 40, a fourth slider 41, a bolt 42, a first protective net cylinder 43 and an annular cover plate 44, the second annular support plate 45 is fixed to the end of the second rotating shaft 6, the third arc-shaped guide rail 40 is fixedly mounted on the side surface of the second annular support plate 45, the third arc-shaped guide rail 40 is sleeved outside the second rotating shaft 6, the third arc-shaped guide rail 40 is slidably provided with a plurality of fourth sliders 41 matched with the third arc-shaped guide rail, the fourth sliders 41 are all in threaded connection with the bolt 42, the first protective net cylinder 43 is fixed to the outer annular surface of the second annular support plate 45, the annular cover plate 44 matched with the first protective net cylinder 43 is fixed to the side surface of the first protective net cylinder 43, the tensile shock absorbing bars 37 are fixed to the fourth sliders 41, the number of the fourth sliders 41 of the second vane shock absorbing assembly 35 is the same as the number of the tensile shock absorbing bars 37, the bolts 42 on the fourth sliders 41 fixedly connected to the tensile shock absorbing bars 37 to be adjusted by unscrewing, and the tensile shock absorbing angles of the tensile shock absorbing bars 9 of the vanes 40 can be adjusted by adjusting the tensile shock absorbing bars 41. Wherein the stretching damping strip 37 comprises a box body 46, a rubber sheet 47, a spiral steel wire rope 48, a steel wire rope closed socket 49, a stretching spring 50, a first triangular fixing block 51, a second triangular fixing block 52, a rubber block 53 and a corrugated pipe protecting sleeve 54, a first triangular fixing block 51 is fixed on the side of one box body 46 to facilitate the fixed connection between the box body 46 and the fourth sliding block 41, a second triangular fixing block 52 is fixed on the side of the other box body 46 to facilitate the fixed connection between the box body 46 and the blade 9, a rubber block 53 is fixed on the side of the second triangular fixing block 52, the rubber block 53 has elasticity, the blade 9 can be better adhered and fixed, the side surfaces of the box bodies 46 are respectively provided with an opening 46-1, the opening 46-1 is communicated with the interior of the corrugated pipe protective sleeve 54, the openings 46-1 of the box bodies 46 are respectively adhered and fixed with a rubber sheet 47 matched with the opening 46-1, the rubber sheets 47 are respectively provided with a plurality of second through holes 47-1, the corrugated pipe protective sleeve 54 is internally provided with a plurality of spiral steel wire ropes 48 with the same number as the second through holes 47-1, the strength of the stretching shock-absorbing strip 37 can be enhanced by the design of the plurality of spiral steel wire ropes 48, the two ends of the spiral steel wire ropes 48 respectively extend into the two box bodies 46 through the second through holes 47-1 on the two rubber sheets 47, the rubber sheets 47 prevent the spiral steel wire ropes 48 from being mutually wound, the two ends of the spiral steel wire ropes 48 are respectively provided with steel wire rope closed rope joints 49 matched with the two ends of the spiral steel wire ropes 49, the steel wire rope closed joint 49 at the ends of the spiral steel wire ropes 48 are fixedly connected with the inner walls of the box bodies 46 through stretching springs 50, the stretching shock-absorbing strip 37 has elasticity, the blade 9 is also cushioned and damped during the stabilization, wherein the bellows shield 54 acts as a dust guard.

When the second rotating shaft 6 rotates, the fourth annular fixing plate 26, the third annular fixing plate 25 and the rubber damper 27 are driven to rotate, and because two side surfaces of the third annular fixing plate 25 are respectively fixed with the third sliders 24 on the two second circular arc-shaped guide rails 23, when the third annular fixing plate 25 rotates, the third slider 24 fixedly connected with the third annular fixing plate slides on the second circular arc-shaped guide rails 23, and the second supporting cylinder 20 for supporting the third annular fixing plate 25, the rubber damper 27 and other components does not rotate; when the second rotating shaft 6 slides in the sleeve 5, the part fixedly connected with the second rotating shaft 6 moves along with the second rotating shaft, the second supporting cylinder 20 is sleeved outside the second rotating shaft 6, the bottom surface of the second rotating shaft is fixedly provided with a supporting seat 21, the bottom surface of the supporting seat 21 is fixed with the top surface of the second sliding block 19, and when the second supporting cylinder 20 moves, the second sliding block 19 moves on the linear guide rail 18 along with the second rotating shaft in an equal amount. The two ends of the rubber damper block 27 are sleeved with a first limiting ring 28 and a second limiting ring 29 which are matched with the rubber damper block, the side surface of the first limiting ring 28 is welded and fixed with the inner annular surface of the third annular fixing plate 25, the side surface of the second limiting ring 29 is welded and fixed with the outer annular surface of the fourth annular fixing plate 26, and the first limiting ring 28 and the second limiting ring 29 limit the rubber damper block 27 to prevent the rubber damper block from falling off in the vibration process. The upper portion of the side face of the tower barrel 1 is fixedly provided with a first annular supporting plate 10, the first annular supporting plate 10 is sleeved outside the tower barrel 1, the top face of the first annular supporting plate 10 is fixedly provided with a first circular arc-shaped guide rail 11, the first circular arc-shaped guide rail 11 is sleeved outside the tower barrel 1, the top face of the first circular arc-shaped guide rail 11 is provided with a plurality of first sliding blocks 12 matched with the first circular arc-shaped guide rail in a sliding mode, first annular fixing plates 13 are fixed on the first sliding blocks 12, the first annular fixing plates 13 are sleeved outside the tower barrel 1 and are in rotary connection with the tower barrel 1, first supporting cylinders 14 are fixedly welded between the top faces of the first annular fixing plates 13 and the bottom face of the generator box body 2, the first supporting cylinders 14 are sleeved outside the tower barrel 1, first protective cylinders 15 matched with the first annular fixing plates are fixed on the outer ring face of the first annular fixing plates 13, the side faces of the first supporting cylinders 14 are fixedly welded on the portions of the first rotating shaft 3 in the length direction, when a controller controls the generator to work according to wind direction signals measured by a wind direction sensor, the blades 9, the supporting plates 16 for supporting the second supporting plates 20 and the first sliding blocks 12 drive the first sliding blocks 11 to move on the first sliding blocks. Wherein, a plurality of ribbed plates 17 are fixed at the joint of the first supporting cylinder 14 and the supporting plate 16, which play the role of auxiliary support. A rotating shaft protecting sleeve 55 is arranged between the mounting block 7 and the first guide rail assembly 36, the rotating shaft protecting sleeve 55 is sleeved outside the third rotating shaft 8, the rotating shaft protecting sleeve 55 comprises a second protecting net cylinder 56 and a rubber cylinder 57, the two sides of the second protecting net cylinder 56 are respectively fixedly adhered with the rubber cylinders 57 matched with the second protecting net cylinder, one rubber cylinder 57 extends into the first protecting net cylinder 43 of the first guide rail assembly 36 and is fixed with the fourth slider 41 inside the first protecting net cylinder, the other rubber cylinder 57 is fixed with the mounting block 7, the rotating shaft protecting sleeve 55 plays a role in protecting the third rotating shaft 8, the second protecting net cylinder 56 can prevent most of particles such as sand particles from directly impacting the third rotating shaft 8, and the two sides of the second protecting net cylinder 56 are respectively fixedly adhered with the rubber cylinders 57 matched with the second protecting net cylinder 56, so that the second protecting net cylinder 56 plays a role in buffering when being impacted by the particles, and reduces vibration to the third rotating shaft 8; similarly, a rotating shaft protecting sleeve 55 is arranged between the mounting block 7 and the second guide rail assembly 38, the rotating shaft protecting sleeve 55 is sleeved outside the second rotating shaft 6, the rotating shaft protecting sleeve 55 comprises a second protecting net cylinder 56 and a rubber cylinder 57, the two sides of the second protecting net cylinder 56 are respectively fixedly adhered with the rubber cylinders 57 matched with the second protecting net cylinder, one rubber cylinder 57 extends into the first protecting net cylinder 43 of the second guide rail assembly 38 and is fixed with the fourth slider 41 inside the first protecting net cylinder, the other rubber cylinder 57 is fixed with the mounting block 7, the rotating shaft protecting sleeve 55 plays a role in protecting the second rotating shaft 6, most of particles such as sand particles can directly impact the second rotating shaft 6, and the two sides of the second protecting net cylinder 56 are respectively fixedly adhered with the rubber cylinders 57 matched with the second protecting net cylinder 56, so that the second protecting net cylinder 56 plays a role in buffering when being impacted by the particles, and vibration to the second rotating shaft 6 is reduced.

The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a aerogenerator blade damping device, includes tower section of thick bamboo (1), generator box (2) and blade (9), its characterized in that: the top surface of the tower drum (1) is provided with a generator box body (2), the first output fixedly connected with rotating shaft (3) of the generator box body (2), the end fixing of the first rotating shaft (3) is provided with a circular fixing plate (4), the other side surface of the circular fixing plate (4) is fixed with a sleeve (5), the sleeve (5) is internally slid and provided with a second rotating shaft (6) matched with the sleeve, the other end fixedly connected with mounting block (7) of the second rotating shaft (6), the other side surface fixedly connected with third rotating shaft (8) of the mounting block (7), the mounting block (7) is fixedly provided with a plurality of blades (9), the side upper part of the tower drum (1) is fixed with a first annular supporting plate (10), A first annular supporting plate (10) is sleeved outside a tower barrel (1), a first arc-shaped guide rail (11) is fixedly mounted on the top surface of the first annular supporting plate (10), the first arc-shaped guide rail (11) is sleeved outside the tower barrel (1), a plurality of first sliding blocks (12) matched with the first arc-shaped guide rail (11) are arranged on the top surface of the first arc-shaped guide rail in a sliding mode, a first annular fixing plate (13) is fixed on the first sliding blocks (12), the first annular fixing plate (13) is sleeved outside the tower barrel (1) and is rotatably connected with the tower barrel, and a first supporting circular ring is fixedly welded between the top surface of the first annular fixing plate (13) and the bottom surface of a generator box body (2) The tower comprises a drum (14), a first supporting drum (14) is sleeved outside a tower drum (1), a first protective drum (15) matched with the first supporting drum is fixed on the outer annular surface of a first annular fixing plate (13), a supporting plate (16) is fixedly welded on the side surface of the first supporting drum (14) along the length direction of a first rotating shaft (3), a plurality of rib plates (17) are fixed at the joint of the first supporting drum (14) and the supporting plate (16), a linear guide rail (18) is fixed on the top surface of the supporting plate (16), a second sliding block (19) matched with the linear guide rail (18) is arranged on the linear guide rail (18) in a sliding mode, a second supporting drum (20) is sleeved outside the second rotating shaft (6), a supporting seat (21) is fixed on the bottom surface of the second supporting drum (20), the bottom surface of the supporting seat (21) is fixed on the top surface of the second sliding block (19), a second annular fixing plate (22) is symmetrically fixed on the inner annular surface of the second supporting drum (20), a second arc-shaped guide rail (23) is fixedly installed on the inner side surface of the second annular fixing plate (22), a plurality of second sliding blocks (23) are respectively, a plurality of second sliding blocks (24) are connected with a third sliding block fixing plates (24), and a plurality of second sliding blocks (25) are respectively fixed on the second sliding blocks (24), a fourth annular fixing plate (26) matched with the second rotating shaft (6) is fixed outside the second rotating shaft (6), a plurality of rubber shock absorption blocks (27) are uniformly fixed between the fourth annular fixing plate (26) and the third annular fixing plate (25), a first limiting ring (28) and a second limiting ring (29) matched with the rubber shock absorption blocks are sleeved at two ends of each rubber shock absorption block (27), the side surface of each first limiting ring (28) is welded and fixed with the inner annular surface of the third annular fixing plate (25), the side surface of each second limiting ring (29) is welded and fixed with the outer annular surface of the fourth annular fixing plate (26), a circular fixing block (30) matched with the sleeve is fixed on the inner wall of the sleeve (5), a sliding block (31) matched with the sleeve is arranged inside the sleeve (5) in a sliding mode, a plurality of first through holes (30-1) are uniformly arranged on the side surface of each circular fixing block (30), a sliding block (32) matched with the sliding block (32) is arranged in each first through hole (30-1), a sliding block (32) matched with the sliding block (32) is fixed between the side surface of each sliding block (32) and the sliding block (31), and a spring (31) is fixed between the sliding block (32) and the other end of the sliding block (4), the damping device is characterized in that a first blade damping assembly (34) is mounted on the third rotating shaft (8), the first blade damping assembly (34) comprises a first guide rail assembly (36) and a plurality of groups of stretching damping strips (37), the first guide rail assembly (36) comprises a circular cover plate (39), a third arc-shaped guide rail (40), a fourth sliding block (41), a bolt (42), a first protective net cylinder (43) and an annular cover plate (44), the circular cover plate (39) is fixed to the end portion of the third rotating shaft (8), the third arc-shaped guide rail (40) is fixedly mounted on the side surface of the circular cover plate (39), the third arc-shaped guide rail (40) is sleeved outside the third rotating shaft (8), a plurality of fourth sliding blocks (41) matched with the third arc-shaped guide rail (40) are arranged on the third arc-shaped guide rail in a sliding mode, the fourth sliding blocks (41) are connected with the bolt (42) in a threaded mode, a first protective net cylinder (43) is fixed to the outer annular surface of the circular cover plate (39), the annular cover plate (44) is fixed to the annular cover plate (44) matched with the annular cover plate (44), the stretching damping strips (37), and the other ends of the stretching damping strips (37) penetrate through the stretching damping strips (46), and the stretching damping strips (37), and the stretching damping strips (47) extend out of the annular cover plate (44), and the stretching damping strips (37), and the stretching damping strips (47), the cable comprises a spiral steel wire rope (48), a steel wire rope closed rope joint (49), an extension spring (50), a first triangular fixing block (51), a second triangular fixing block (52), a rubber block (53) and a corrugated pipe protecting sleeve (54), wherein box bodies (46) are respectively fixed on two side surfaces of the corrugated pipe protecting sleeve (54), openings (46-1) are formed in the side surfaces of the box bodies (46), the openings (46-1) are communicated with the inside of the corrugated pipe protecting sleeve (54), rubber sheets (47) matched with the openings (46-1) are fixedly adhered to the openings (46-1) of the box bodies (46), a plurality of second through holes (47-1) are formed in the rubber sheets (47), a plurality of spiral steel wire ropes (48) with the same number as the second through holes (47-1) are arranged in the corrugated pipe protecting sleeve (54), two ends of the spiral steel wire ropes (48) respectively extend into the two box bodies (46) through the second through holes (47-1) in the two rubber sheets (47), the two ends of the spiral steel wire ropes (48) are respectively provided with the steel wire rope closed rope joints (49) matched with the steel wire ropes, the two ends of the spiral steel wire ropes (48) are respectively connected with the end portions of the triangular fixing blocks (49), the triangular fixing blocks (46) of the box bodies (46), and the inner walls (51) of the triangular fixing blocks (46), a second triangular fixing block (52) is fixed to the side face of the other box body (46), the first triangular fixing block (51) is fixed to a fourth sliding block (41), a rubber block (53) is fixed to the side face of the second triangular fixing block (52), the rubber block (53) is fixedly adhered to one side face of each blade (9), a rotating shaft protecting sleeve (55) is arranged between the mounting block (7) and the first guide rail assembly (36), the rotating shaft protecting sleeve (55) is sleeved outside a third rotating shaft (8), the rotating shaft protecting sleeve (55) comprises a second protecting net barrel (56) and a rubber barrel (57), rubber barrels (57) matched with the second protecting net barrel (56) are fixedly adhered to two sides of the second protecting net barrel (56) respectively, one rubber barrel (57) extends into the first protecting net barrel (43) of the first guide rail assembly (36) and is fixed to the fourth sliding block (41) inside the first protecting net barrel, the other rubber barrel (57) is fixed to the mounting block (7), a second rotating shaft (6) is provided with a second damping guide rail assembly (35), the second damping guide rail assembly (35) comprises a plurality of annular guide rail assemblies (38), and a second damping guide rail assembly (35), and a plurality of second damping guide rail assemblies (38), and a plurality of second damping guide rail assemblies (40), and a plurality of second damping guide rail assemblies (35) comprises a plurality of annular arc-shaped guide rail assemblies (41), and a plurality of second guide rail assemblies (38), and a plurality of arc-shaped guide rail assemblies (40), and a plurality of second guide rail assemblies (40), and a plurality of arc-shaped guide rail assemblies (40), and a plurality of second guide rail assemblies, the bolt (42), the first protective net barrel (43) and the annular cover plate (44), the second annular support plate (45) is fixed to the end of the second rotating shaft (6), a third arc-shaped guide rail (40) is fixedly mounted on the side face of the second annular support plate (45), the third arc-shaped guide rail (40) is sleeved outside the second rotating shaft (6), a plurality of fourth sliding blocks (41) matched with the third arc-shaped guide rail are arranged on the third arc-shaped guide rail (40) in a sliding mode, the bolts (42) are connected to the fourth sliding blocks (41) in a threaded mode, the first protective net barrel (43) is fixed to the outer annular face of the second annular support plate (45), the annular cover plate (44) matched with the first protective net barrel (43) is fixed to the side face of the first protective net barrel (43), the tensile shock-absorbing strips (37) are fixed to the fourth sliding blocks (41), the other ends of the tensile shock-absorbing strips (37) penetrate through a center hole of the annular cover plate (44), each tensile shock-absorbing strip (37) comprises a box body (46), a rubber sheet (47), a spiral steel wire rope (48), a steel rope joint (49), a protective sleeve joint (50), a protective sleeve (54), a triangular rubber block (54), a protective sleeve fixing block (54) and a corrugated pipe fixing block (54), a corrugated pipe fixing block (54) and a corrugated pipe fixing block (54), the side surfaces of the box bodies (46) are respectively provided with an opening (46-1), the openings (46-1) are communicated with the interior of a corrugated pipe protective sleeve (54), the openings (46-1) of the box bodies (46) are respectively fixedly adhered with rubber sheets (47) matched with the openings, the rubber sheets (47) are respectively provided with a plurality of second through holes (47-1), the corrugated pipe protective sleeve (54) is internally provided with a plurality of spiral steel wire ropes (48) with the same number as the second through holes (47-1), two ends of each spiral steel wire rope (48) respectively extend into the two box bodies (46) through the second through holes (47-1) on the two rubber sheets (47), two ends of each spiral steel wire rope (48) are respectively provided with steel wire rope closed rope joints (49) matched with the spiral steel wire rope closed rope joints, the steel wire rope closed rope joints (49) at the end parts of the spiral steel wire ropes (48) are respectively fixedly connected with the inner walls of the box bodies (46) through stretching springs (50), the side surfaces of one box body (46) are respectively fixed with a first triangular fixing block (51), the side surfaces of the other box body (46) are respectively fixed with a second rubber sheet (52), and a triangular fixing block (53) is fixed with a second rubber block (41), a rotating shaft protecting sleeve (55) is arranged between the mounting block (7) and the second guide rail assembly (38), the rotating shaft protecting sleeve (55) is sleeved outside the second rotating shaft (6), the rotating shaft protecting sleeve (55) comprises a second protecting net barrel (56) and rubber cylinders (57), the rubber cylinders (57) matched with the second protecting net barrel (56) are fixedly adhered to two sides of the second protecting net barrel (56) respectively, one rubber cylinder (57) extends into the first protecting net barrel (43) of the second guide rail assembly (38) and is fixed with a fourth sliding block (41) inside the first protecting net barrel, and the other rubber cylinder (57) is fixed with the mounting block (7).

2. A wind turbine blade damping device according to claim 1, characterised in that: the first supporting cylinder (14), the supporting plate (16) and the rib plate (17) are fixed through welding, the section of the inner ring surface of the third annular fixing plate (25) is octagonal, the section of the outer ring surface of the fourth annular fixing plate (26) is octagonal, the fourth annular fixing plate (26) is arranged inside the third annular fixing plate (25), eight sections of the outer ring surface of the fourth annular fixing plate (26) are aligned with eight sections of the inner ring surface of the third annular fixing plate (25), the rubber shock absorption block (27) is fixed with the third annular fixing plate (25) or the fourth annular fixing plate (26) through pasting, the first through hole (30-1) is hexagonal, and the first protective net cylinder (43) is made of stainless steel.

3. A wind turbine blade damping device according to claim 1, characterised in that: the quantity of the tensile shock-absorbing strips (37) of the first blade shock-absorbing component (34) or the second blade shock-absorbing component (35) is two times of that of the blade (9), a pair of tensile shock-absorbing strips (37) are respectively pasted and fixed on the two side surfaces of the blade (9), each pair of tensile shock-absorbing strips (37) are respectively pasted on the middle part and the root part of the blade (9), the quantity of the fourth sliding blocks (41) of the first blade shock-absorbing component (34) is the same as that of the tensile shock-absorbing strips (37) on the fourth sliding blocks, and the quantity of the fourth sliding blocks (41) of the second blade shock-absorbing component (35) is the same as that of the tensile shock-absorbing strips (37) on the fourth sliding blocks.

4. A wind turbine blade damping device according to claim 1, characterised in that: first pivot (3), sleeve (5), second pivot (6), installation piece (7), third pivot (8), the central line homogeneous phase of second support drum (20), be parallel to each other between linear guide (18) and second pivot (6), second pivot (6) and sliding block (31) are located the both sides of circular fixed block (30) respectively.