A blade vibration reduction device for a horizontal axis wind turbine

Abstract

The present invention relates to a vibration reduction device for blades of a horizontal axis wind turbine, wherein the device comprises a first mounting plate and a hub, wherein the first mounting plate is fixedly connected to one side of the hub, a groove is provided in the first mounting plate, two fixing plates are fixedly connected to the side of the inner wall of the groove, a first sliding rod is fixedly connected between the two fixing plates, two first sliding sleeves are slidingly connected to the surface of the first sliding rod, and the two ends of a first spring are fixedly connected between the two first sliding sleeves. When the wind blows the blades, the blades will generate a certain vibration, and when the blades generate vibration, the main shaft and the second mounting plate drive the two first sliding sleeves to move toward each other under the action of the activity of the first connecting shaft, and the first sliding sleeve squeezes the first spring, and under the elastic action of the first spring, the squeezing force of the two first sliding sleeves is buffered, thereby achieving a vibration reduction effect.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbines, and in particular to a vibration reduction device for blades of horizontal-axis wind turbines. Background Art

[0002] Wind turbines are constantly developing in the direction of high power and long blades. Long and flexible blades can increase power generation and reduce costs, but they also have risks. With the increase in flexibility, the blades will have nonlinear deformation under the action of aerodynamics, making the aeroelastic instability of the blades more likely to occur. Flexible blades encounter vibration problems, including torsional divergence and possible stall flutter. Unbalanced wind turbine blades, including mass imbalance and aerodynamic imbalance, will cause large vibrations to the unit, endangering its life and safety. Therefore, in response to the above problems, it is urgent to develop a systematic wind turbine blade shock absorption device with high buffering performance to meet the shock absorption needs of the blades. Summary of the invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vibration reduction device for blades of a horizontal-axis wind turbine generator set, which solves the technical problem of poor vibration reduction effect.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A blade damping device for a horizontal axis wind turbine generator system comprises a first mounting plate and a first hub, the first mounting plate being fixedly connected to one side of the first hub, a groove being provided in the first mounting plate, two fixing plates being fixedly connected to the side surfaces of the inner walls of the groove, a first sliding rod being fixedly connected between the two fixing plates, two first sliding sleeves being slidably connected to the surface of the first sliding rod, a first spring being sleeved on the surface of the first sliding rod, two ends of the first spring being fixedly connected between the two first sliding sleeves, a first connecting shaft being fixedly connected to the side surface of the first sliding sleeve, a first connecting rod being sleeved on the surface of the first connecting shaft, another first connecting shaft being sleeved on the other end of the first connecting rod, a second mounting plate being fixedly connected to the side surface of the other first connecting shaft, a main shaft being fixedly connected to the side surface of the second mounting plate, a blade and a second hub being fixedly connected to the surface of the main shaft, and the second hub being connected to the blade.

[0006] Preferably, the blade and the first mounting plate are both fixedly connected with second connecting shafts, the two second connecting shafts are both movably connected with second connecting rods, and a buffer assembly is fixedly connected between the two second connecting rods.

[0007] Furthermore, the buffer assembly includes a first shock-absorbing plate, two third sliding grooves are provided in the first shock-absorbing plate, a first slider is slidably connected in the third sliding groove, a second spring is fixedly connected to the first slider, the other end of the second spring is fixedly connected to the inner wall of the third sliding groove, elastic sheets are fixedly connected to the two first sliders, a second shock-absorbing plate is fixedly connected to the elastic sheet, a third spring is fixedly connected between the first shock-absorbing plate and the second shock-absorbing plate, and the first shock-absorbing plate and the second shock-absorbing plate are respectively fixedly connected to two second connecting rods.

[0008] Furthermore, the number of the third springs is not less than four, and the third springs are strong compression springs.

[0009] Preferably, the top and bottom of the second mounting plate are both fixedly connected with a shock absorbing assembly.

[0010] Furthermore, the shock absorbing assembly includes a slide seat, which is fixedly connected to the second mounting plate, a movable groove is opened in the slide seat, the top and bottom of the inner wall of the movable groove are opened with a first slide groove, a slide plate is slidably connected in the first slide groove, a fourth spring is fixedly connected between the side of the inner wall of the movable groove and the slide plate, a second slide rod is fixedly connected to the side of the slide plate, a second slide rod is slidably connected to the surface of the second slide rod, and the second slide sleeve is fixedly connected in the movable groove.

[0011] Furthermore, a second slide groove is provided at the top and the bottom of the first mounting plate, a second slider is slidably connected in the second slide groove, and the second slider is fixedly connected to the slide seat.

[0012] Furthermore, a shock-absorbing cover is fixedly connected to the surface of the sliding seat.

[0013] Furthermore, the number of the fourth springs is not less than four, and the fourth springs are strong compression springs.

[0014] Preferably, the other side of the first hub is fixedly connected to a nacelle, and the bottom of the nacelle is fixedly connected to a tower. Compared with the prior art, the present invention has the following beneficial effects:

[0015] The vibration reduction device for blades of a horizontal-axis wind turbine generator set of the present invention is provided with a first connecting shaft, a first sliding sleeve and a first spring. When the wind blows the blades, the blades will generate certain vibrations. When the blades generate vibrations, the main shaft and the second mounting plate drive the two first sliding sleeves to move toward each other under the active action of the first connecting shaft. The first sliding sleeve squeezes the first spring. Under the elastic action of the first spring, the squeezing force of the two first sliding sleeves is buffered, thereby achieving a vibration reduction effect.

[0016] Furthermore, by setting a second connecting shaft, an elastic sheet, a first slider, a first slide groove and a second spring, when wind blows the blades, the blades will generate a certain vibration. Under the activity of the second connecting shaft, the elastic sheet is squeezed to a certain extent through the second shock-absorbing plate. The force exerted on the elastic sheet causes the first slider to slide in the third slide groove, squeezing the second spring. Under the elastic action of the second spring, the first slider is driven to slide toward each other in the third slide groove, thereby buffering the vibration exerted on the blades and enhancing the shock-absorbing and buffering effect on the blades.

[0017] Furthermore, by setting a sliding seat, a second sliding rod, a second sliding sleeve, a first sliding groove, a movable groove and a fourth spring, when the second mounting plate is moved to the right by the force, the sliding seat moves to the right, driving the second sliding rod to slide in the second sliding sleeve, driving the sliding plate to slide in the first sliding groove, and under the elastic action of the fourth spring, the movement of the second mounting plate can be more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front cross-sectional schematic diagram of a vibration reduction device for blades of a horizontal axis wind turbine according to the present invention;

[0019] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0020] Figure 3 for Figure 1 The enlarged schematic diagram at B in the middle;

[0021] Figure 4 for Figure 2 A schematic diagram of the cross section of the middle shock absorber cover;

[0022] Figure 5 for Figure 1 Schematic diagram of the three-dimensional middle slide.

[0023] Wherein: 1: first mounting plate; 2: groove; 3: fixing plate; 4: first slide bar; 5: first slide sleeve; 6: first wheel hub; 7: first spring; 8: nacelle; 9: tower; 10: first connecting shaft; 11: first connecting rod; 12: second mounting plate; 13: second connecting shaft; 14: blade; 15: second wheel hub; 16: main shaft; 17: second connecting rod; 18: buffer assembly; 181: elastic sheet; 182: third slide slot; 183: first slider; 184: first damping plate; 185: second spring; 186: third spring; 187: second damping plate; 19: damping assembly; 191: second slide bar; 192: second slide sleeve; 193: slide seat; 194: slide plate; 195: first slide slot; 196: movable slot; 197: fourth spring; 198: damping cover; 20: second slide slot; 21: second slider. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0027] A vibration reduction device for blades of a horizontal axis wind turbine set proposed in an embodiment of the present invention is provided. Figure 1As shown, it includes a first mounting plate 1 and a first hub 6, the first mounting plate 1 is fixedly connected to one side of the first hub 6, a groove 2 is opened in the first mounting plate 1, two fixing plates 3 are fixedly connected to the side of the inner wall of the groove 2, a first slide bar 4 is fixedly connected between the two fixing plates 3, a first connecting shaft 10, a first sleeve 5 and a first spring 7 are arranged, the surface of the first slide bar 4 is slidingly connected to the two first sleeves 5, the surface of the first slide bar 4 is sleeved with the first spring 7, both ends of the first spring 7 are fixedly connected between the two first sleeves 5, the side of the first sleeve 5 is fixedly connected to the first connecting shaft 10, the surface of the first connecting shaft 10 is sleeved with the first connecting rod 11, the other end of the first connecting rod 11 is sleeved with another first connecting shaft 10, the side of the other first connecting shaft 10 is fixedly connected to the second mounting plate 12, the side of the second mounting plate 12 is fixedly connected to the main shaft 16, the main shaft 16 is connected to the second hub 15, and the second hub 15 is connected to the blade 14. When the wind blows the blades 14, the blades 14 will vibrate to a certain extent. When the blades 14 vibrate, the main shaft 16 and the second mounting plate 12, under the action of the activity of the first connecting shaft 10, drive the two first sliding sleeves 5 to move toward each other, and the first sliding sleeves 5 squeeze the first spring 7. Under the elastic action of the first spring 7, the squeezing force of the two first sliding sleeves 5 is buffered, thereby achieving a shock-absorbing effect.

[0028] The blade 14 and the first mounting plate 1 are both fixedly connected with a second connecting shaft 13, and the two second connecting shafts 13 are both movably connected with a second connecting rod 17, and a buffer assembly 18 is fixedly connected between the two second connecting rods 17; Figure 2 As shown, the buffer assembly 18 includes a first shock-absorbing plate 184, two third slide grooves 182 are provided in the first shock-absorbing plate 184, and a first slider 183 is slidably connected in the third slide groove 182. By setting a second connecting shaft 13, an elastic sheet 181, a first slider 183, a first slide groove 195 and a second spring 185, the first slider 183 is fixedly connected to the second spring 185, and the other end of the second spring 185 is fixedly connected to the inner wall of the third slide groove 182, the two first sliders 183 are fixedly connected to the elastic sheet 181, and the second shock-absorbing plate 187 is fixedly connected to the elastic sheet 181, and the third spring 186 is fixedly connected between the first shock-absorbing plate 184 and the second shock-absorbing plate 187, and the first shock-absorbing plate 184 and the second shock-absorbing plate 187 are respectively fixedly connected to the two second connecting rods 17. When the wind blows the blade 14, the blade 14 will generate a certain vibration. Under the action of the second connecting shaft 13, the second shock-absorbing plate 187 will squeeze the elastic sheet 181 to a certain extent. The force exerted on the elastic sheet 181 causes the first slider 183 to slide in the third slide groove 182, squeezing the second spring 185. Under the elastic action of the second spring 185, the first slider 183 is driven to slide toward each other in the third slide groove 182, thereby buffering the vibration exerted on the blade 14 and enhancing the shock-absorbing and buffering effect on the blade 14.

[0029] The top and bottom of the second mounting plate 12 are fixedly connected with a shock absorbing assembly 19, Figure 3 As shown, the shock absorbing assembly 19 includes a slide seat 193. By arranging the slide seat 193, the second slide rod 191, the second slide sleeve 192, the first slide groove 195, the movable groove 196 and the fourth spring 197, when the second mounting plate 12 is subjected to a force and moves to the right, the slide seat 193 moves to the right, driving the second slide rod 191 to slide in the second slide sleeve 192, driving the slide plate 194 to slide in the first slide groove 195, and under the elastic action of the fourth spring 197, the movement of the second mounting plate 12 can be more stable. The slide seat 193 is fixedly connected to the second mounting plate 12. Figure 4 As shown, a shock-absorbing cover 198 is fixedly connected to the surface of the slide seat 193. A movable groove 196 is provided in the slide seat 193, and a first slide groove 195 is provided at the top and bottom of the inner wall of the movable groove 196. A slide plate 194 is slidably connected in the first slide groove 195, and a fourth spring 197 is fixedly connected between the side of the inner wall of the movable groove 196 and the slide plate 194. A second slide bar 191 is fixedly connected to the side of the slide plate 194, and a second slide sleeve 192 is slidably connected to the surface of the second slide bar 191, and the second slide sleeve 192 is fixedly connected in the movable groove 196.

[0030] Reference Figure 5 As shown, a second slide groove 20 is provided at the top and bottom of the first mounting plate 1, a second slider 21 is slidably connected in the second slide groove 20, and the second slider 21 is fixedly connected to the slide seat 193. By setting the second slider 21 to slide left and right in the second slide groove 20, the left and right movement of the slide seat 193 can be more stably coordinated.

[0031] A nacelle 8 is fixedly connected to the other side of the first hub 6 , and a tower 9 is fixedly connected to the bottom of the nacelle 8 .

[0032] The number of the third spring 186 and the fourth spring 197 is not less than four. The third spring 186 and the fourth spring 197 are strong compression springs.

[0033] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] Specific embodiment description part: When the wind blows the blade 14, the blade 14 will rotate with the main shaft 16, and at the same time, the blade 14 will vibrate, so that the main shaft 16 and the second mounting plate 12 drive the two first sliding sleeves 5 to move toward each other under the action of the activity of the first connecting shaft 10, and the first sliding sleeve 5 squeezes the first spring 7. Under the elastic action of the first spring 7, the squeezing force of the two first sliding sleeves 5 is buffered. At the same time, when the second mounting plate 12 is subjected to the rightward force, it moves to the right, driving the slide seat 193 to move to the right, driving the second slide rod 191 to slide in the second slide sleeve 192, and driving the slide plate 194 slides in the first slide groove 195, and cooperates with the elastic action of the fourth spring 197 and the movement of the second mounting plate 12 to reduce the vibration of the blade 14. At the same time, under the activity of the second connecting shaft 13, the second shock-absorbing plate 187 exerts a certain degree of extrusion on the elastic sheet 181. The force exerted on the elastic sheet 181 causes the first slider 183 to slide in the third slide groove 182, squeezing the second spring 185. Under the elastic action of the second spring 185, the first slider 183 is driven to slide toward each other in the third slide groove 182, thereby buffering the vibration of the blade 14.

[0035] Reference Figure 1 and Figure 2As shown, the groove 2 is opened in the first mounting plate 1, and two fixing plates 3 are fixedly connected to the side of the inner wall of the groove 2, and a first slide bar 4 is fixedly connected between the two fixing plates 3. The surface of the first slide bar 4 is slidably connected to two first sliding sleeves 5, and the surface of the first slide bar 4 is sleeved with a first spring 7. The two ends of the first spring 7 are fixedly connected between the two first sliding sleeves 5. The side of the first sliding sleeve 5 is fixedly connected with a first connecting shaft 10, and the surface of the first connecting shaft 10 is sleeved with a first connecting rod 11, and the other end of the first connecting rod 11 is sleeved with another first connecting shaft 10. The side is fixedly connected with a second mounting plate 12. By setting the first connecting shaft 10, the first sliding sleeve 5 and the first spring 7, when the wind blows the blade 14, the blade 14 will generate a certain vibration. When the blade 14 generates vibration, the main shaft 16 and the second mounting plate 12 drive the two first sliding sleeves 5 to move toward each other under the active action of the first connecting shaft 10. The first sliding sleeve 5 squeezes the first spring 7. Under the elastic action of the first spring 7, the squeezing force of the two first sliding sleeves 5 is buffered to achieve a shock absorbing effect. The two third sliding grooves 182 are opened in the first shock absorbing plate 184. The third sliding grooves 1 A first slider 183 is slidably connected to the inner wall of the third slide groove 182, and a second spring 185 is fixedly connected to the first slider 183. The other end of the second spring 185 is fixedly connected to the inner wall of the third slide groove 182. The two first sliders 183 are fixedly connected to an elastic sheet 181, and a second damping plate 187 is fixedly connected to the elastic sheet 181. A third spring 186 is fixedly connected between the first damping plate 184 and the second damping plate 187. The first damping plate 184 and the second damping plate 187 are respectively fixedly connected to the two second connecting rods 17. By setting the second connecting shaft 13, the elastic sheet 181, the first The slider 183, the first slide groove 195 and the second spring 185, when the wind blows the blade 14, the blade 14 will produce a certain vibration. Under the activity of the second connecting shaft 13, the second shock-absorbing plate 187 produces a certain extrusion on the elastic sheet 181. The force exerted on the elastic sheet 181 causes the first slider 183 to slide in the third slide groove 182, and squeezes the second spring 185. Under the elastic action of the second spring 185, the first slider 183 is driven to slide toward each other in the third slide groove 182, so as to buffer the vibration exerted on the blade 14 and enhance the shock-absorbing and buffering effect on the blade 14.

[0036] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the slide seat 193 is fixedly connected to the second mounting plate 12, a movable groove 196 is provided in the slide seat 193, the top and bottom of the inner wall of the movable groove 196 are provided with a first slide groove 195, a slide plate 194 is slidably connected in the first slide groove 195, a fourth spring 197 is fixedly connected between the side of the inner wall of the movable groove 196 and the slide plate 194, a second slide bar 191 is fixedly connected to the side of the slide plate 194, a second slide sleeve 192 is slidably connected to the surface of the second slide bar 191, and the second slide sleeve 192 It is fixedly connected in the movable groove 196, and by arranging a slide seat 193, a second slide rod 191, a second slide sleeve 192, a first slide groove 195, a movable groove 196 and a fourth spring 197, when the second mounting plate 12 is subjected to a force and moves to the right, the slide seat 193 moves to the right, driving the second slide rod 191 to slide in the second slide sleeve 192, driving the slide plate 194 to slide in the first slide groove 195, and under the elastic action of the fourth spring 197, it can cooperate with the movement of the second mounting plate 12 to be more stable.

[0037] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A blade vibration reduction device for a horizontal axis wind turbine, characterized in that: The invention comprises a first mounting plate (1) and a first wheel hub (6), wherein the first mounting plate (1) is fixedly connected to one side of the first wheel hub (6), a groove (2) is provided in the first mounting plate (1), two fixing plates (3) are fixedly connected to the side of the inner wall of the groove (2), a first sliding rod (4) is fixedly connected between the two fixing plates (3), the surface of the first sliding rod (4) is slidably connected to two first sliding sleeves (5), a first spring (7) is sleeved on the surface of the first sliding rod (4), and two ends of the first spring (7) are fixedly connected between the two first sliding sleeves (5), A first connecting shaft (10) is fixedly connected to the side of the first sliding sleeve (5), a first connecting rod (11) is sleeved on the surface of the first connecting shaft (10), another first connecting shaft (10) is sleeved on the other end of the first connecting rod (11), a second mounting plate (12) is fixedly connected to the side of the other first connecting shaft (10), a main shaft (16) is fixedly connected to the side of the second mounting plate (12), a blade (14) and a second hub (15) are fixedly connected to the surface of the main shaft (16), and the second hub (15) is connected to the blade (14); The blade (14) and the first mounting plate (1) are both fixedly connected with a second connecting shaft (13), the two second connecting shafts (13) are both movably connected with a second connecting rod (17), and a buffer assembly (18) is fixedly connected between the two second connecting rods (17); The buffer assembly (18) comprises a first damping plate (184), two third slide grooves (182) are provided in the first damping plate (184), a first slider (183) is slidably connected in the third slide groove (182), a second spring (185) is fixedly connected to the first slider (183), the other end of the second spring (185) is fixedly connected to the inner wall of the third slide groove (182), the two first sliders (183) are fixedly connected to an elastic sheet (181), the elastic sheet (181) is fixedly connected to a second damping plate (187), a third spring (186) is fixedly connected between the first damping plate (184) and the second damping plate (187), and the first damping plate (184) and the second damping plate (187) are respectively fixedly connected to two second connecting rods (17); The top and bottom of the second mounting plate (12) are both fixedly connected with a shock absorbing assembly (19); The shock absorbing assembly (19) comprises a slide seat (193), the slide seat (193) is fixedly connected to the second mounting plate (12), a movable groove (196) is provided in the slide seat (193), the top and bottom of the inner wall of the movable groove (196) are provided with first slide grooves (195), a slide plate (194) is slidably connected in the first slide groove (195), a fourth spring (197) is fixedly connected between the side surface of the inner wall of the movable groove (196) and the slide plate (194), a second slide bar (191) is fixedly connected to the side surface of the slide plate (194), a second slide sleeve (192) is slidably connected to the surface of the second slide bar (191), and the second slide sleeve (192) is fixedly connected in the movable groove (196); A second slide groove (20) is provided at the top and the bottom of the first mounting plate (1), a second sliding block (21) is slidably connected in the second slide groove (20), and the second sliding block (21) is fixedly connected to the sliding seat (193).

2. The blade vibration reduction device for a horizontal axis wind turbine according to claim 1, characterized in that: The number of the third springs (186) is not less than four, and the third springs (186) are strong compression springs.

3. The blade vibration reduction device for a horizontal axis wind turbine according to claim 1, characterized in that: A shock absorbing cover (198) is fixedly connected to the surface of the sliding seat (193).

4. The blade vibration reduction device for a horizontal axis wind turbine according to claim 1, characterized in that: The number of the fourth springs (197) is not less than four, and the fourth springs (197) are strong compression springs.

5. The blade vibration reduction device for a horizontal axis wind turbine according to claim 1, characterized in that: The other side surface of the first hub (6) is fixedly connected to a nacelle (8), and the bottom of the nacelle (8) is fixedly connected to a tower (9).

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