A damper, a wind turbine generator support structure, and a wind turbine generator

Abstract

The embodiment of the application provides a damper, a wind turbine generator set support structure and a wind turbine generator set, the damper comprising an outer cylinder, an inner cylinder arranged in the inner part of the outer cylinder and a limiting piece; a first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity; a top plate is arranged in the inner part of the inner cylinder and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity; the limiting piece is a piston structure, the outer cylinder, the inner cylinder and the limiting piece form a viscous damper, the inner cylinder provides a tuned mass for the viscous damper, a multiple tuned liquid column damping vibration reduction and load reduction device, namely a multiple universal tuned liquid column damper, is realized, the tuning frequency band of the damper is increased and can be dynamically adjusted, and the vibration reduction and load reduction effect of the damper is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dampers, in particular to a damper, a wind turbine generator set support structure and a wind turbine generator set. BACKGROUND

[0002] In the context of wind power generation, the large-scale of wind turbine generator sets is an inevitable trend to reduce the cost of land-based and offshore wind power generation. Large-scale wind turbine generator sets require higher towers, and the stability of the whole structure of the wind turbine generator set, as the largest rotating power system in the world, is particularly important.

[0003] At a certain wind speed, wind will alternately generate vortices on both sides of the tower structure and detach from the surface of the structure. The alternating vortices induce a pressure difference on the surface of the structure, which will cause the tower to vibrate periodically. When the natural frequency of the whole structure composed of the wind turbine generator set and the support structure approaches the frequency of the vortex, the tower structure will resonate and be destroyed, and the fatigue load will be significantly increased.

[0004] In order to avoid the disastrous damage of such vortex-induced vibration to the tower structure of the wind turbine, a suitable damper is installed on the structure in engineering, such as a liquid damper, which dissipates energy by using the shaking of the liquid. It has the advantages of simple structure, low cost and is widely used. At present, the liquid damper is usually designed to have a significant damping effect on a certain main vibration frequency of the whole structure. However, in actual engineering, the vibration response frequency of the tower structure under different internal and external environmental loads usually has a large difference, and the frequency of the whole structure changes in real time with the service time. Only when the tuning frequency of the damper approaches the natural frequency of the whole structure, the damper can have good damping and load reduction effect. For example, when the wind speed gradually increases, the vibration frequency of the whole structure changes from low order to high order. At this time, the damper originally designed to suppress low-order vibration cannot effectively suppress high-order vibration, and has the problem of narrow applicable tuning frequency band. SUMMARY

[0005] In view of the above problems, a damper, a wind turbine generator set support structure and a wind turbine generator set are provided to overcome the above problems or at least partially solve the above problems, comprising:

[0006] A damper, the damper comprising an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a limiting piece connected between the outer cylinder and the inner cylinder;

[0007] The first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and the limiting piece, and an annular tuning liquid column damper is formed by adding damping liquid in the first cavity;

[0008] The inner cylinder is internally provided with a top plate, and the top plate is sealingly connected with the inner wall of the inner cylinder, and a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuning liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity, and the damping liquid flows between the first cavity and the second cavity through the communication valve by driving the top plate to move up and down, so as to adjust the tuning frequency of the annular tuning liquid column damper and the tuning liquid damper.

[0009] The limiting piece is a piston structure, the outer cylinder, the inner cylinder and the limiting piece constitute a viscous damper, and the inner cylinder provides a tuning mass for the viscous damper.

[0010] Optionally, the damper further comprises a driving device for driving the top plate to move up and down.

[0011] Optionally, the driving device comprises a driving rod and a motor system, and the driving rod is connected with the top plate.

[0012] Optionally, the driving rod is fixedly connected with the top plate, or is detachably connected with the top plate.

[0013] Optionally, the limiting piece comprises an outer shell and an inner plate, and the outer shell and the inner plate are connected by a piston.

[0014] Optionally, the outer shell and the inner plate are connected by any one of the following materials:

[0015] Viscoelastic material, viscous fluid, shape memory alloy material.

[0016] Optionally, a plurality of limiting pieces are provided, and the spacing distances between the plurality of limiting pieces are the same.

[0017] Optionally, the bottom of the outer cylinder is provided with a support on the side facing the inner cylinder, and the support provides support for the inner cylinder.

[0018] Optionally, the bottom of the inner cylinder is slidingly connected with the support.

[0019] Optionally, the support is provided with a protruding portion, the bottom of the inner cylinder is provided with a guide rail portion, and the protruding portion is inserted into the guide rail portion.

[0020] Optionally, the support is a hollow structure.

[0021] Optionally, the support is provided with a support body, and a plurality of hollow portions are arranged on the support body.

[0022] Optionally, both ends of the support are fixedly connected with the inner wall of the outer cylinder.

[0023] A wind turbine support structure is provided with the damper as described above.

[0024] A wind turbine is installed in the wind turbine support structure.

[0025] The embodiment of the present application has the following advantages:

[0026] In the embodiment of the present application, the damper comprises an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a limiting piece connected between the outer cylinder and the inner cylinder; a first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity; a top plate is arranged inside the inner cylinder and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity, and a driving device is arranged in the second cavity; the top plate is driven to move up and down, so that the damping liquid flows between the first cavity and the second cavity through the communication valve, the tuning frequencies of the annular tuned liquid column damper and the tuned liquid damper are adjusted, the frequency tuning range of the annular tuned liquid column damper and the tuned liquid damper is improved, the tuning frequency ranges of the two dampers are complementary, the double tuning function is realized, the limiting piece is a piston structure, the outer cylinder, the inner cylinder, and the limiting piece form a viscous damper, the inner cylinder provides tuning mass for the viscous damper, a triple-tuned liquid column damper vibration reduction and load reduction device is formed by the annular tuned liquid column damper, the tuned liquid damper, and the viscous damper, that is, a multiple universal tuned liquid column damper, the tuning frequency band of the damper is improved and can be dynamically adjusted, the vibration reduction and load reduction effect of the damper is improved, the probability of resonance of the tower structure is reduced, the fatigue load is reduced, the extreme operating conditions are better coped with, the tuning frequency of the annular tuned liquid column damper and the tuned liquid damper after complementation still cannot meet the structural requirements, is adapted to the low-order to high-order natural frequency range of the future large-scale wind turbine whole machine structure, and realizes the structural vibration reduction and load reduction in different operating conditions in the whole life cycle. In addition, the overall structure of the damper has symmetry, the annular tuned liquid column damper, the tuned liquid damper, and the viscous damper can all realize tuning and vibration reduction of load excitation in each direction, and are matched with the randomness of wind load. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0028] Figure 1is a structural schematic diagram of a damper provided by some embodiments of the present application;

[0029] Figure 2 is a structural schematic diagram of a ring-shaped tuned liquid damper provided by some embodiments of the present application;

[0030] Figure 3 is a structural schematic diagram of an inner cylinder of a damper provided by some embodiments of the present application;

[0031] Figure 4 is a structural schematic diagram of a limiting piece of a damper provided by some embodiments of the present application. DETAILED DESCRIPTION

[0032] In order to make the above objectives, characteristics and advantages of the present application more apparent, comprehensible and easier to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work, fall within the scope of protection of the present application.

[0033] In the scenario of wind power generation, large-scale wind turbine generators are the inevitable trend to reduce the cost of land-based wind power and offshore wind power generation. Large-scale wind turbine generators require higher support structures, and the stability of the whole wind turbine generator structure, as the largest rotating power system in the world, is particularly important.

[0034] At a certain wind speed, wind will alternately generate vortices on both sides of the tower structure and detach from the surface of the structure. The alternating vortices induce a pressure difference on the surface of the structure, which will cause the tower to vibrate periodically. When the natural frequency of the whole machine structure composed of the "turbine-support structure" approaches the frequency of vortex occurrence, resonance damage of the tower structure will occur, and the fatigue load will be significantly increased.

[0035] In order to avoid the disastrous damage of the vortex-induced vibration to the wind turbine support structure, a suitable damper is installed on the support structure in engineering, for example, a liquid damper, which dissipates energy by shaking of the liquid, has the advantages of simple structure, low cost, and is widely used. At present, the liquid damper is usually designed according to the main vibration frequency of the whole machine structure to play a significant damping effect. However, in actual engineering, the vibration response frequency of the tower structure under the action of different internal and external environmental loads usually has a large difference, and the whole machine structure frequency changes in real time with the service time. Only when the tuning frequency of the damper is close to the natural frequency of the whole machine structure, the damper can have good damping and load reduction effect. For example, when the wind speed gradually increases, the vibration frequency of the whole machine structure changes from low order to high order, at this time, the damper originally plays a suppression effect on low order vibration, and cannot play a good suppression effect on high order vibration, and has the problem of narrow applicable tuning frequency band.

[0036] Therefore, the damper provided by the application has three working modes, one is to rely on the annular tuning liquid column damper for structural vibration tuning, the second is to rely on the tuning liquid damper for structural vibration tuning, and the third is to rely on the viscous damper for structural vibration tuning.

[0037] At the same time, the volume of the damping liquid in the annular tuning liquid column damper and the tuning liquid damper can be increased or decreased by the driving device, so that the annular tuning liquid column damper and the tuning liquid damper both have a wide frequency range, and the tuning frequency ranges of the two dampers are complementary.

[0038] For extreme operating conditions, if the tuning frequency of the annular tuning liquid column damper and the tuning liquid damper after complementation still cannot meet the structural requirements, the viscous damper can be relied on for tuning at this time; through the application, the low order to high order natural frequency range of the whole machine structure of the future large-scale wind turbine can be adapted, and the structural damping and load reduction in different operating conditions in the whole life can be realized.

[0039] Secondly, due to the symmetry of the overall structure, the annular tuning liquid column damper, the tuning liquid damper and the viscous damper can all realize tuning and damping of load excitation in each direction, which matches the randomness of wind load.

[0040] The embodiments of the application are further described below with reference to the drawings:

[0041] Referring to Figure 1 , a structural schematic diagram of a damper provided by some embodiments of the application is shown, the damper can include an outer cylinder 1, an inner cylinder 2 arranged inside the outer cylinder 1, and a limiting piece 3 connected between the outer cylinder 1 and the inner cylinder 2.

[0042] As some examples, the damper outer cylinder, inner cylinder can be rubber material (such as styrene-butadiene rubber, natural rubber, silicone rubber, etc.), metal material (such as steel, aluminum alloy, copper alloy, etc.), composite material (rubber metal composite, liquid metal composite, etc.) and the like, and those skilled in the art can select the material of the damper outer cylinder and inner cylinder according to actual needs, and the present application does not limit this.

[0043] As Figure 1 , the damper outer cylinder 1 inside includes a plurality of limit pieces 3 and an inner cylinder 2.

[0044] For a ring tuned liquid column damper:

[0045] The outer wall of the outer cylinder 1, the outer wall of the inner cylinder 2, and the limit piece 3 form a first cavity, and a damping liquid is added in the first cavity to constitute a ring-shaped tuned liquid column damper.

[0046] As some examples, the inner cylinder 2 is arranged inside the outer cylinder 1 and the limit piece 3, and the outer wall of the inner cylinder 2 forms a first cavity with the inner wall of the outer cylinder 1 and the limit piece 3, and a damping liquid can be added in the first cavity to constitute a ring-shaped tuned liquid column damper.

[0047] As some examples, the damping liquid can be silicone oil, or a water-glycol mixture, or a polyol, etc., which has the characteristics of high chemical stability, appropriate viscosity, high and low temperature resistance, wear resistance, low acidity and alkalinity, low toxicity, and not easy to oxidize. Those skilled in the art can select the material of the damping liquid according to actual needs, and the present application does not limit this.

[0048] As Figure 2 , after adding the damping liquid in the first cavity, a ring-shaped tuned liquid column damper 5 is constituted.

[0049] For a tuned liquid damper:

[0050] The inner cylinder 2 is provided with a top plate 6 inside and is sealingly connected between the inner wall of the inner cylinder 2 and the top plate 6, and a second cavity is formed between the inner wall of the inner cylinder 2 and the top plate 6. A damping liquid is added in the second cavity to constitute a tuned liquid damper; a communication valve is arranged between the first cavity and the second cavity, and the damping liquid flows between the first cavity and the second cavity through the communication valve by driving the top plate 6 to move up and down, so as to adjust the tuning frequency of the ring-shaped tuned liquid column damper and the tuned liquid damper.

[0051] As Figure 3 , a top plate 6 can be arranged inside the inner cylinder 2, and the top plate 6 is sealingly connected between the inner wall of the inner cylinder 2, so that a second cavity 8 is formed between the inner wall of the inner cylinder 2 and the top plate 6. As Figure 2 , Figure 3The tuning liquid damper 9 can be constituted by adding damping liquid in the second cavity 8.

[0052] As Figure 2 , Figure 3 One or more communication valves can be arranged between the first cavity and the second cavity. When tuning is needed, the damping liquid added in the second cavity 8 can flow between the first cavity and the second cavity 8 through the communication valves by driving the top plate 6 to move up and down, so as to adjust the tuning frequency of the annular tuning liquid column damper 5 and the tuning liquid damper 9.

[0053] In some embodiments of the present application, the damper further comprises a driving device 7 for driving the top plate 6 to move up and down.

[0054] In some embodiments of the present application, the driving device 7 comprises a driving rod and a motor system, and the driving rod is connected with the top plate 6. As an example, the driving rod is fixedly connected with the top plate 6, or the driving rod is detachably connected with the top plate 6.

[0055] As Figure 3 The driving rod in the driving device 7 can be connected with the top plate 6 at the center of the other side of the top plate 6 relative to the second cavity 8, so that the motor system connected with the driving device 7 can drive the top plate 6 to move up and down through the driving rod.

[0056] As Figure 3 A groove can also be arranged on one side of the top plate 6 relative to the inner wall of the inner cylinder 2, and a rubber ring 10 can be arranged in the groove, so that the damping liquid injected in the second cavity 8 can be prevented from penetrating to the other side of the top plate 6 relative to the second cavity 8 when the top plate 6 moves up and down.

[0057] For a viscous damper:

[0058] The limiting member 3 is in a piston structure, the outer cylinder 1, the inner cylinder 2 and the limiting member 3 constitute a viscous damper, and the inner cylinder 2 provides a tuning mass for the viscous damper.

[0059] In some embodiments of the present application, a plurality of limiting members 3 are arranged, and the spacing distances between the plurality of limiting members 3 are the same.

[0060] In some embodiments of the present application, the limiting member 3 comprises an outer shell and an inner plate, and the outer shell and the inner plate are connected in a piston structure.

[0061] In some embodiments of the present application, the outer shell and the inner plate are connected by using any one of the following materials: viscoelastic material, viscous fluid, shape memory alloy material.

[0062] As Figure 1、 Figure 4 A plurality of limiters 3 can be arranged between the outer cylinder 1 and the outer wall of the inner cylinder 2, and the interval distances between the plurality of limiters 3 are the same, so as to form a viscous damper; wherein the limiter 3 comprises an outer shell 12 and an inner plate 11, and the outer shell 12 and the inner plate 11 are connected by a plurality of piston structures 14, and the inner shell 12 is further provided with a plurality of springs 13.

[0063] In actual application, the outer cylinder 1, the inner cylinder 2 and the limiter 3 form a viscous damper, and the inner cylinder 2 can provide a tuned mass for the viscous damper.

[0064] As some examples, the shown viscoelastic material is a series of high molecular polymer materials such as propylene compounds, diene compounds, asphalt compounds, styrene compounds and the like which have strain hysteresis characteristics; the shown viscous fluid is a fluid with internal friction and a non-zero shear modulus; the shown shape memory alloy material can include copper-aluminum-nickel alloy, nickel-titanium alloy, nickel-titanium-based shape memory alloy, copper-based shape memory alloy, iron-based shape memory alloy; wherein the shape memory alloy material is an alloy with "memory", which can restore to the initial shape after deformation caused by pressure or temperature change.

[0065] For a brace:

[0066] In some embodiments of the present application, the bottom of the outer cylinder 1 is provided with a support 4 on the side facing the inner cylinder 2, and the support 4 provides support for the inner cylinder 2.

[0067] In some embodiments of the present application, the bottom of the inner cylinder 2 is slidingly connected with the support 4. As an example, the support is provided with a protruding portion, and the bottom of the inner cylinder is provided with a guide rail portion, and the protruding portion is inserted into the guide rail portion.

[0068] In some embodiments of the present application, the support 4 is a hollow structure. As an example, the support is provided with a support body, and a plurality of hollow portions are arranged on the support body.

[0069] In some embodiments of the present application, the two ends of the support are fixedly connected with the inner wall of the outer cylinder.

[0070] As Figure 1 A support 4 can be arranged at the bottom of the damper, and the inner cylinder 2 is supported by the support 4, and the bottom of the inner cylinder 2 is slidingly connected with the support 4, wherein the support 4 is a hollow structure, so that the damping liquid in the first cavity can flow freely through the support 4.

[0071] The present application is exemplarily described below with reference to the accompanying drawings: Figure 1 、 2 , 3, 4:

[0072] After the damper in the application is applied to the wind turbine structure for tuning, the damping liquid can be added in the first cavity between the inner wall of the outer cylinder 1, the outer wall of the inner cylinder 2 and the limiting member 3 to form the annular tuning liquid column damper 5, and the damping liquid can be added in the second cavity 8 between the inner wall of the inner cylinder 2 and the top plate 6 to form the tuning liquid damper.

[0073] According to the vibration frequency of the wind turbine structure, the motor system of the driving device 7 drives the top plate 6 connected by the driving rod to move up and down on one side, and the added damping liquid can flow between the first cavity and the second cavity through the communication valve by using the principle of atmospheric pressure, so as to increase or decrease the volume of the damping liquid in the annular tuning liquid column damper and the tuning liquid damper, thereby improving the tuning frequency range of the damper.

[0074] If the motor system of the driving device 7 drives the top plate 6 connected by the driving rod to move upward on one side, the damping liquid in the annular tuning liquid column damper 5 will flow to the tuning liquid damper 9 through the communication valve, and if the motor system of the driving device 7 drives the top plate 6 connected by the driving rod to move downward on one side, the damping liquid in the tuning liquid damper 9 will flow to the first annular tuning liquid damper 5 through the communication valve.

[0075] For extreme operating conditions, if the tuning frequency of the annular tuning liquid column damper 5 and the tuning liquid damper 9 after complementation still cannot meet the structural requirements, at this time, the viscous damper composed of the outer cylinder 1, the inner cylinder 2 and the limiting member 3 can be relied on to provide tuning mass for the viscous damper through the inner cylinder 2 for tuning.

[0076] In the embodiment of the present application, the damper comprises an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a limiting piece connected between the outer cylinder and the inner cylinder; a first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity; a top plate is arranged inside the inner cylinder and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity, a driving device is arranged in the second cavity, and the damping liquid flows between the first cavity and the second cavity through the communication valve by driving the top plate to move up and down, so as to adjust the tuning frequency of the annular tuned liquid column damper and the tuned liquid damper, to increase the frequency tuning range of the annular tuned liquid column damper and the tuned liquid damper, and the tuning frequency ranges of the two dampers are complementary, realizing a double tuning function; the limiting piece is a piston structure, the outer cylinder, the inner cylinder, and the limiting piece form a viscous damper, the inner cylinder provides a tuning mass for the viscous damper, a third tuned liquid column damper vibration reduction and load reduction device comprising the annular tuned liquid column damper, the tuned liquid damper, and the viscous damper, that is, a multiple universal tuned liquid column damper, is realized, the tuning frequency band of the damper is increased and can be dynamically adjusted, the vibration reduction and load reduction effect of the damper is improved, the probability of resonance of the tower structure is reduced, the fatigue load is reduced, extreme operating conditions are better coped with, and the tuned frequency of the annular tuned liquid column damper and the tuned liquid damper after complementation still cannot meet the structural requirements, is adapted to the low-order to high-order natural frequency range of the whole structure of a future large-scale wind turbine, and realizes structural vibration reduction and load reduction in different operating conditions in the whole service life. In addition, the overall structure of the damper has symmetry, the annular tuned liquid column damper, the tuned liquid damper, and the viscous damper can all realize tuning and vibration reduction of load excitation in each direction, and are matched with the randomness of wind load.

[0077] In some embodiments of the present application, a wind turbine support structure is also provided, wherein the damper described above is arranged in the wind turbine support structure.

[0078] The damper comprises an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a limiting piece connected between the outer cylinder and the inner cylinder;

[0079] A first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity;

[0080] The inner cylinder is internally provided with a top plate, and the top plate is sealingly connected with the inner wall of the inner cylinder, and a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuning liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity, and the damping liquid flows between the first cavity and the second cavity through the communication valve by driving the top plate to move up and down, so as to adjust the tuning frequency of the annular tuning liquid column damper and the tuning liquid damper.

[0081] The limiting piece is a piston structure, the outer cylinder, the inner cylinder and the limiting piece constitute a viscous damper, and the inner cylinder provides a tuning mass for the viscous damper.

[0082] Optionally, the damper further comprises a driving device for driving the top plate to move up and down.

[0083] Optionally, the driving device comprises a driving rod and a motor system, and the driving rod is connected with the top plate.

[0084] Optionally, the driving rod is fixedly connected with the top plate, or is detachably connected with the top plate.

[0085] Optionally, the limiting piece comprises an outer shell and an inner plate, and the outer shell and the inner plate are connected by a piston.

[0086] Optionally, the outer shell and the inner plate are connected by any one of the following materials:

[0087] Viscoelastic material, viscous fluid, shape memory alloy material.

[0088] Optionally, a plurality of limiting pieces are provided, and the spacing distances between the plurality of limiting pieces are the same.

[0089] Optionally, the bottom of the outer cylinder is provided with a support on the side facing the inner cylinder, and the support provides support for the inner cylinder.

[0090] Optionally, the bottom of the inner cylinder is slidingly connected with the support.

[0091] Optionally, the support is provided with a protruding portion, the bottom of the inner cylinder is provided with a guide rail portion, and the protruding portion is inserted into the guide rail portion.

[0092] Optionally, the support is a hollow structure.

[0093] Optionally, the support is provided with a support body, and a plurality of hollow portions are arranged on the support body.

[0094] Optionally, both ends of the support are fixedly connected with the inner wall of the outer cylinder.

[0095] In some embodiments of the present application, a wind turbine generator is also provided, which is provided with a wind turbine generator support structure as described above.

[0096] The wind turbine generator support structure is provided with a damper as described above.

[0097] The damper comprises an outer cylinder, an inner cylinder arranged inside the outer cylinder, and a limiting member connected between the outer cylinder and the inner cylinder.

[0098] A first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the limiting member, and a ring-shaped tuned liquid column damper is formed by adding damping liquid in the first cavity.

[0099] The inner cylinder is provided with a top plate inside and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity, and the damping liquid flows between the first cavity and the second cavity through the communication valve by driving the top plate to move up and down, so as to adjust the tuning frequency of the ring-shaped tuned liquid column damper and the tuned liquid damper.

[0100] The limiting member is a piston structure, the outer cylinder, the inner cylinder, and the limiting member form a viscous damper, and the inner cylinder provides a tuned mass for the viscous damper.

[0101] Optionally, the damper further comprises a driving device for driving the top plate to move up and down.

[0102] Optionally, the driving device comprises a driving rod and a motor system, and the driving rod is connected with the top plate.

[0103] Optionally, the driving rod is fixedly connected with the top plate, or is detachably connected with the top plate.

[0104] Optionally, the limiting member comprises an outer shell and an inner plate, and the outer shell and the inner plate are connected by a piston.

[0105] Optionally, the outer shell and the inner plate are connected by any one of the following materials:

[0106] Viscoelastic material, viscous fluid, shape memory alloy material.

[0107] Optionally, a plurality of limiting members are provided, and the spacing distances between the plurality of limiting members are the same.

[0108] Optionally, the bottom of the outer cylinder is provided with a support on the side facing the inner cylinder, and the support provides support for the inner cylinder.

[0109] Optionally, the inner cylinder bottom and the support are in sliding connection.

[0110] Optionally, the support is provided with a protruding part, and the inner cylinder bottom is provided with a guide rail part, and the protruding part is inserted in the guide rail part.

[0111] Optionally, the support is in a hollow structure.

[0112] Optionally, the support is provided with a support body, and a plurality of hollow parts are arranged on the support body.

[0113] Optionally, two ends of the support are fixedly connected with the inner wall of the outer cylinder.

[0114] In some embodiments of the present application, a wind turbine generator is also provided, which is installed on the wind turbine generator support structure as described above, and the wind turbine generator support structure can also be referred to as a part of the wind turbine generator.

[0115] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation portal for user to choose authorization or refusal.

[0116] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0117] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device or computer program product. Therefore, the embodiments of the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0118] The embodiments of the present application are described with reference to the flowchart illustrations and / or block diagrams of the methods, terminal devices (systems) and computer program products according to the embodiments of the present application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal devices to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal devices, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0119] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal devices to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0120] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal devices, such that a series of operational steps are carried out on the computer or other programmable terminal devices to produce a computer implemented process so that the instructions executed on the computer or other programmable terminal devices provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0121] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional modifications and variations to the embodiments without departing from the scope of the present application. Accordingly, the appended claims are intended to encompass all such modifications and variations as falling within the scope of the embodiments of the present application.

[0122] Finally, it is to be understood that the phraseology or terminology such as "first" and "second" etc. used herein is merely intended to differentiate one entity or operation from another entity or operation, without necessarily requiring or implying any actual such relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other closure, are intended to cover the non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include those elements alone but can include other elements not expressly listed or even include elements inherent in such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the above element.

[0123] The above provides a damper, a wind turbine generator support structure and a wind turbine generator, which are described in detail. The principles and implementation modes of the present application are described by applying specific examples in the present text. The above description of the examples is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A damper, characterized in that, The damper includes an outer cylinder, an inner cylinder disposed inside the outer cylinder, and a limiting member connecting the outer cylinder and the inner cylinder; A first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the limiting member. An annular tuned liquid column damper is formed by adding damping fluid into the first cavity. The inner cylinder is provided with a top plate, and the top plate is sealed to the inner wall of the inner cylinder. A second cavity is formed between the inner wall of the inner cylinder and the top plate. A tuning liquid damper is formed by adding damping fluid into the second cavity. A connecting valve is provided between the first cavity and the second cavity. By driving the top plate to move up and down, the damping fluid flows between the first cavity and the second cavity through the connecting valve to adjust the tuning frequency of the annular tuning liquid column damper and the tuning liquid damper. The limiting member is a piston structure, and the outer cylinder, the inner cylinder and the limiting member constitute a viscous damper, with the inner cylinder providing the tuning mass for the viscous damper; The outer cylinder has a support bracket on the bottom side facing the inner cylinder, which provides support for the inner cylinder, and the bottom of the inner cylinder is slidably connected to the support bracket.

2. The damper according to claim 1, characterized in that, The damper also includes a drive device for driving the top plate to move up and down.

3. The damper according to claim 2, characterized in that, The driving device includes a drive rod and a motor system, and the drive rod is connected to the top plate.

4. The damper according to claim 3, characterized in that, The drive rod is fixedly connected to the top plate, or it is detachably connected.

5. The damper according to claim 1, characterized in that, The limiting component includes an outer shell and an inner plate, and the outer shell and the inner plate are connected by a piston.

6. The damper according to claim 5, characterized in that, The outer shell and the inner panel are connected using any of the following materials: Viscoelastic materials, viscous fluids, and shape memory alloys.

7. The damper according to claim 1, characterized in that, The limiting member is provided in multiple ways, and the interval between the multiple limiting members is the same.

8. The damper according to claim 1, characterized in that, The bracket is provided with a protrusion, and the bottom of the inner cylinder is provided with a guide rail, with the protrusion inserted into the guide rail.

9. The damper according to claim 1, characterized in that, The support structure is hollow.

10. The damper according to claim 9, characterized in that, The bracket is provided with a bracket body, and the bracket body is provided with multiple hollow parts.

11. The damper according to claim 1, characterized in that, The two ends of the bracket are fixedly connected to the inner wall of the outer cylinder.

12. A support structure for a wind turbine generator set, characterized in that, The wind turbine generator support structure is provided with a damper as described in any one of claims 1 to 11.

13. A wind turbine generator set, characterized in that, The wind turbine generator set is installed on the wind turbine generator set support structure as described in claim 12.

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