A separate generator elastic support spring and setting method

Abstract

The present application belongs to the technical field of wind power damping, and particularly relates to a separate generator elastic support spring and a setting method. The separate generator elastic support spring comprises at least two conical spring assemblies coaxially sleeved with each other, wherein the conical spring assembly comprises a rubber layer, an inner conical surface and an outer conical surface arranged on the inner and outer sides of the rubber layer respectively, an inner partition plate arranged on the inner conical surface of the rubber layer, and an outer partition plate arranged on the outer conical surface of the rubber layer. The conical spring assemblies with different numbers and different physical properties have new physical properties after being coaxially sleeved with each other.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wind power damping, and particularly relates to a separated generator elastic support spring and a generator elastic support spring setting method. BACKGROUND

[0002] The field of wind power is booming, and in order to more efficiently utilize wind energy resources and land resources, various large-megawatt models are emerging.

[0003] With the improvement of power generation efficiency, the size and weight of the generator inside the fan also increase. Under the influence of the front end coupling torque, the generator may vibrate violently, which not only causes damage to the internal components of the generator, but also may cause damage to the front end coupling. Therefore, the damping of the fan generator is of great significance.

[0004] The damping control of the generator mainly depends on the elastic support spring of the generator, which is mainly composed of an elastic body and a metal part. The elastic body is the core component of the damping function, and is usually formed in the form of a conical spring by vulcanizing metal rubber. When designing the elastic support spring of the generator, the stiffness is the main parameter to be considered. The stiffness is mainly determined by the type of rubber, the thickness of the metal partition, the structure form and other factors.

[0005] The static stiffness of the generator elastic support spring affects the deformation amount when it is under load, and the dynamic stiffness determines whether the generator can avoid the resonance region in the normal working state. According to experience, the generator elastic support spring with smaller stiffness is more conducive to avoiding the resonance region of the generator; for the same product, when the dynamic and static ratios are consistent, the static stiffness decreases with the decrease of the dynamic stiffness. Since the mass of the generator is gradually increasing, the load on the generator elastic support spring is also increasing, so the deformation of the generator elastic support spring under load is larger, and the generator elastic support spring needs to have a large enough allowable deformation to avoid interference. When designing the traditional generator elastic support conical spring, it often faces difficulties.

[0006] When producing and processing, the thickness of the conical spring can only be increased by opening a new vulcanization mold. The cost of a new mold is often tens of thousands of yuan to hundreds of thousands of yuan, which is expensive. If the performance of the trial-produced conical spring cannot meet the requirements after opening a new mold, the structure scheme will be terminated, and the corresponding mold will be wasted, causing great loss.

[0007] Therefore, it is urgent to develop a generator elastic support spring and a generator elastic support spring setting method which can solve the above technical problems. SUMMARY

[0008] In view of the above technical problems, the present application aims to provide a separated generator elastic support spring which can solve at least one of the above technical problems.

[0009] The present invention also proposes a method for setting an elastic support spring of a generator, which can solve at least one of the above technical problems.

[0010] According to the present invention, a separate generator elastic support spring is provided, comprising at least two conical spring assemblies coaxially sleeved with each other, the conical spring assemblies comprising: a rubber layer, with an inner conical surface and an outer conical surface respectively provided on the inner and outer sides of the rubber layer; an inner partition plate provided on the inner conical surface of the rubber layer; and an outer partition plate provided on the outer conical surface of the rubber layer. The conical spring assemblies of different numbers and different physical properties have new physical properties after being coaxially sleeved with each other.

[0011] In a specific embodiment, the two conical spring assemblies coaxially sleeved with each other are respectively a first conical spring assembly and a second conical spring assembly, and the first inner partition of the first conical spring assembly is adaptively connected to the second outer partition of the second conical spring assembly.

[0012] In a specific embodiment, the busbar length of the inner partition and the outer partition is greater than the busbar length of the adhesive layer, thereby forming a mounting position between the inner partition and the outer partition, and a connecting member is provided between the first inner partition of the first conical spring assembly and the second outer partition of the second conical spring assembly, and the connecting member is located at the mounting position.

[0013] In a specific embodiment, the connecting member includes a bolt passing through the first inner partition plate and the second outer partition plate and a nut arranged on the bolt.

[0014] In a specific embodiment, mounting holes for installing the bolts are provided on the first inner partition plate and the second outer partition plate, and central axes of the mounting holes are perpendicular to the first inner partition plate.

[0015] In a specific embodiment, the size of the first conical spring assembly is larger than that of the second conical spring assembly, so that the first inner diaphragm of the first conical spring assembly can be adaptively connected to the second outer diaphragm of the second conical spring assembly.

[0016] In a specific embodiment, an external clamping mechanism is provided on the outer wall of the outer partition, and an internal clamping mechanism is provided on the inner wall of the inner partition, and the two conical spring assemblies are connected via the external clamping mechanism and the internal clamping mechanism.

[0017] In a specific embodiment, the external clamping mechanism includes an external step provided on the outer wall of the outer partition, and the internal clamping mechanism includes an internal step provided on the inner wall of the inner partition.

[0018] In a specific embodiment, the outer step is configured such that the lower portion thereof is convex outward, and the inner step is configured such that the upper portion thereof is convex inward.

[0019] According to the present invention, a method for setting up a generator elastic support spring is also provided. According to the physical property requirements of the generator elastic support spring, multiple conical spring assemblies are selected and coaxially sleeved to form a separate generator elastic support spring provided by the present invention, and are installed at the corresponding position of the generator.

[0020] Compared with the prior art, the advantages of this application are as follows.

[0021] The present invention transforms the integral supporting conical spring in the traditional generator elastic support into a plurality of separate conical spring assemblies, and can meet the requirements of stiffness, height and load deformation through the combination of different conical spring assemblies.

[0022] In terms of actual use, with the iteration of wind turbine models, the types of generators are becoming more and more diverse. When providing customized solutions, the main engine factory is often required to conduct machine testing and on-machine testing. Under the scheme provided by the present invention of forming a generator elastic support spring by a plurality of conical spring assemblies, it is possible to quickly combine the existing multiple different conical spring assemblies based on the test results of the main engine factory to form a new generator elastic support spring with different physical properties such as different stiffness and thickness, without the need to re-produce new products. In this way, only a few basic molds are needed to make a small number of conical spring assemblies, and several new generator elastic support springs with different physical properties such as different stiffness and thickness can be combined. Whether it is product trial production or production, it is very convenient and has certain economic benefits. Simplified design makes products diversified and flexible, while also saving development costs and shortening the development cycle.

[0023] Increasing the number of layers of conical spring assemblies can achieve technical effects such as reduced stiffness and increased deformability. This can effectively address the vibration reduction issues of high-power, heavy-load generators and meet the requirements of heavy-load generators.

[0024] Traditional conical springs require complete replacement upon damage. However, the separate generator elastic support springs provided by the present invention can be tested and verified on the machine to identify vulnerable areas. If, during actual use, the inner conical spring assembly is found to be prone to damage, additional conical spring assemblies can be produced for this inner layer. If an inner conical spring assembly is damaged, only the inner layer can be replaced, eliminating the need for a complete replacement. This reduces both operational and maintenance costs and the time required for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described below with reference to the accompanying drawings.

[0026] Figure 1A schematic diagram showing an embodiment of a separate generator elastic support spring according to the present invention;

[0027] Figure 2 A schematic diagram showing an embodiment of a connecting member of a separate generator elastic support spring according to the present invention;

[0028] Figure 3 A schematic diagram showing an embodiment of a clamping mechanism of a separate generator elastic support spring according to the present invention;

[0029] Figure 4 Schematic diagram showing various combinations of the split generator elastic support spring according to the present invention;

[0030] Figure 5 A schematic diagram showing a separate generator elastic support spring according to the present invention including three conical spring assemblies is shown.

[0031] In the picture:

[0032] 1. First conical spring assembly; 11. First outer partition; 111. First outer clamping mechanism; 12. First adhesive layer; 13. First inner partition; 131. First inner clamping mechanism;

[0033] 2. Second conical spring assembly; 21. Second outer partition; 211. Second outer clamping mechanism; 22. Second adhesive layer; 23. Second inner partition; 231. Second inner clamping mechanism;

[0034] 3. Installation position;

[0035] 4. Connector; 41. Bolt; 42. Nut; 43. Mounting hole; 44. Gasket;

[0036] 5. Third conical spring assembly;

[0037] 100. Elastic support spring of separate generator.

[0038] In this application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn to scale. DETAILED DESCRIPTION

[0039] The present invention will be described below with reference to the accompanying drawings.

[0040] It should be noted that the directional terms or qualifiers "upper" and "lower" used in this application are all directed to the referenced Figure 1The directionality or the limiting word "inner" used in the present application refers to the direction close to the central axis of the elastic support spring of the separate generator, and the "outer" refers to the direction away from the central axis of the elastic support spring of the separate generator. They are not used to limit the absolute position of the parts involved, but can be changed according to the specific situation.

[0041] Figure 1 The structure of the elastic support spring 100 of the separate generator according to the present application is shown. As shown in the figure, Figure 1 The elastic support spring 100 of the separate generator includes at least two coaxially sleeved conical spring assemblies. In the present embodiment, the elastic support spring 100 of the separate generator includes two coaxially sleeved conical spring assemblies, as shown in the figure, Figure 1 The first conical spring assembly 1 and the second conical spring assembly 2, respectively.

[0042] It is easy to understand that the elastic support spring 100 of the separate generator can also include a plurality of coaxially sleeved conical spring assemblies, as shown in the figure, Figure 5 Figure 5 The elastic support spring 100 of the separate generator formed by coaxially sleeving three conical spring assemblies is shown, and the three conical spring assemblies are the first conical spring assembly 1, the second conical spring assembly 2 and the third conical spring assembly 5, respectively.

[0043] The size of the plurality of coaxially sleeved conical spring assemblies gradually decreases from the outside to the inside, so that the overall structure of the elastic support spring 100 of the separate generator composed of the plurality of conical spring assemblies is generally conical.

[0044] The conical spring assemblies with different numbers and different physical properties have new physical properties after being coaxially sleeved. The physical properties in the text are various parameters that affect the damping effect of the generator, which can be stiffness, thickness, etc.

[0045] According to the present application, the conical spring assembly includes a glue layer, and an inner conical surface and an outer conical surface are arranged on the inner and outer sides of the glue layer, respectively. An inner partition plate is arranged on the inner conical surface of the glue layer, and an outer partition plate is arranged on the outer conical surface of the glue layer.

[0046] As shown in the figure, Figure 1 In the present embodiment, the two coaxially sleeved conical spring assemblies are the first conical spring assembly 1 and the second conical spring assembly 2, respectively, and the first inner partition plate 13 of the first conical spring assembly 1 is connected with the second outer partition plate 21 of the second conical spring assembly 2.

[0047] ​Specifically, the first conical spring assembly 1 comprises a first outer baffle 11, a first adhesive layer 12, and a first inner baffle 13, which are coaxially arranged from outside to inside and from top to bottom. The first outer baffle 11, the first adhesive layer 12, and the first inner baffle 13 are all conical in shape. The first inner baffle 13 is fixed to the inner conical surface inside the first adhesive layer 12 by vulcanization, while the first outer baffle 11 is fixed to the outer conical surface outside the first adhesive layer 12 by vulcanization.

[0048] The second conical spring assembly 2 includes a second outer baffle 21, a second adhesive layer 22, and a second inner baffle 23, which are coaxially arranged from outside to inside and from top to bottom. The second outer baffle 21, the second adhesive layer 22, and the second inner baffle 23 are all conical in shape. The second inner baffle 23 is fixed to the inner conical surface inside the second adhesive layer 22 by vulcanization, while the second outer baffle 21 is fixed to the outer conical surface outside the second adhesive layer 22 by vulcanization.

[0049] According to the present invention, in a preferred embodiment, the generatrices of the inner and outer partitions are longer than those of the adhesive layer. That is, in the first conical spring assembly 1, the generatrices of the first inner and outer partitions 13 and 11 are longer than those of the first adhesive layer 12. In the second conical spring assembly 2, the generatrices of the second inner and outer partitions 23 and 21 are longer than those of the second adhesive layer 22. With this arrangement, the portion between the inner and outer partitions, free of adhesive, forms a mounting location 3 for mounting connector 4.

[0050] After the first conical spring assembly 1 and the second conical spring assembly 2 are coaxially sleeved, a connecting member 4 is provided between the first inner partition 13 of the first conical spring assembly 1 and the second outer partition 21 of the second conical spring assembly 2 , and the connecting member 4 is located at the installation position 3 .

[0051] In a preferred embodiment, multiple connectors 4 are evenly spaced along the circumference between the first inner partition 13 of the first conical spring assembly 1 and the second outer partition 21 of the second conical spring assembly 2. This arrangement further stabilizes the connection between the first conical spring assembly 1 and the second conical spring assembly 2.

[0052] In a specific embodiment, Figure 2 As shown, the connecting member 4 includes a bolt 41 passing through the first inner partition 13 and the second outer partition 21 and a nut 42 disposed on the bolt 41. Furthermore, a mounting hole 43 for mounting the bolt 41 is provided on the first inner partition 13 and the second outer partition 21, and the central axis of the mounting hole 43 is perpendicular to the first inner partition 13.

[0053] In a preferred embodiment, a washer 44 is provided on the bolt 41 , and the washer 44 can increase the contact area between the bolt 41 and the second outer partition plate 21 .

[0054] The size of the first conical spring assembly 1 is larger than that of the second conical spring assembly 2 , so that the first inner partition 13 of the first conical spring assembly 1 can be adaptively connected to the second outer partition 21 of the second conical spring assembly 2 .

[0055] According to the present invention, in a preferred embodiment, an external clamping mechanism is provided on the outer wall of the outer partition, and an internal clamping mechanism is provided on the inner wall of the inner partition, and the two conical spring assemblies are connected by the external clamping mechanism and the internal clamping mechanism.

[0056] That is to say, if Figure 3 As shown, a first external snap-fit ​​mechanism 111 is provided on the outer wall of the first outer partition 11 of the first conical spring assembly 1, and a first internal snap-fit ​​mechanism 131 is provided on the inner wall of the first inner partition 13 of the first conical spring assembly 1. A second external snap-fit ​​mechanism 211 is provided on the outer wall of the second outer partition 21 of the second conical spring assembly 2, and a second internal snap-fit ​​mechanism 231 is provided on the inner wall of the second inner partition 23 of the second conical spring assembly 2. After the first and second conical spring assemblies 1 and 2 are coaxially arranged, the first internal snap-fit ​​mechanism 131 of the first conical spring assembly 1 engages with the second external snap-fit ​​mechanism 211 of the second conical spring assembly 2 to ensure a good connection.

[0057] According to the present invention, the external snap-fit ​​mechanism comprises an outer step on the outer wall of the outer partition, with the outer step being configured with a lower outward projection. The internal snap-fit ​​mechanism comprises an inner step on the inner wall of the inner partition, with the inner step being configured with an upper inward projection. In this arrangement, the first internal snap-fit ​​mechanism 131 of the first conical spring assembly 1 is configured with an upper inward projection, while the second external snap-fit ​​mechanism 211 of the second conical spring assembly 2 is configured with a lower outward projection. When the first and second conical spring assemblies 1 and 2 are coaxially arranged, the upper projection of the first internal snap-fit ​​mechanism 131 of the first conical spring assembly 1 can abut against the lower projection of the second external snap-fit ​​mechanism 211 of the second conical spring assembly 2, thereby forming a snap-fit ​​connection and ensuring a good connection performance.

[0058] According to the present invention, a method for setting up a generator elastic support spring is also provided. According to the physical property requirements of the generator elastic support spring, multiple conical spring assemblies are selected and coaxially sleeved to form the separate generator elastic support spring 100 provided by the present invention, and are installed at the corresponding position of the generator.

[0059] According to the single degree of freedom natural frequency calculation formula It can be seen that the smaller the stiffness, the smaller the natural frequency of the generator vibration. Assuming the rotational speed of the front coupling remains unchanged, that is, its excitation frequency remains unchanged, the frequency ratio of its vibration (the ratio of the excitation frequency to the natural frequency) will increase, making it easier to avoid the resonance range. For heavy-duty generators, the large mass and low stiffness increase the deformation of the generator elastic support spring. Therefore, from the above description, it can be seen that heavy-duty generators require products with low stiffness and large deformation space. The present invention, which coaxially connects multiple conical spring assemblies to form a separate generator elastic support spring 100, can precisely meet this requirement.

[0060] For traditional conical springs, the performance parameters are fixed after production. When there is a new stiffness requirement, it can only be redesigned and produced. However, the separate generator elastic support spring 100 mentioned in the present invention can produce multiple sets of different conical spring components at a time. If there is a new stiffness requirement, multiple combinations can be obtained by matching different inner and outer layers, so the requirements can be met through matching. Figure 4 As shown, there are two inner conical springs (second conical spring assembly 2), numbered A1 and A2. There are also two outer conical springs (first conical spring assembly 1), numbered B1 and B2. By combining these two inner and outer conical springs, four different combinations can be achieved. This allows for greater flexibility and variety in conical spring design, eliminating the need for a redesign tailored to each application.

[0061] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0062] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A separate generator elastic support spring, characterized in that: The invention comprises at least two conical spring assemblies coaxially sleeved with each other, wherein the conical spring assembly comprises: An adhesive layer, wherein an inner conical surface and an outer conical surface are respectively provided on the inner and outer sides of the adhesive layer; An inner partition provided on the inner conical surface of the adhesive layer; and An outer partition provided on the outer conical surface of the adhesive layer, The conical spring assemblies of different numbers and different physical properties are coaxially sleeved with each other to have new physical properties; The two conical spring assemblies coaxially sleeved with each other are respectively a first conical spring assembly (1) and a second conical spring assembly (2); the first inner partition (13) of the first conical spring assembly (1) is adaptively connected to the second outer partition (21) of the second conical spring assembly (2); the busbar lengths of the inner partition and the outer partition are greater than the busbar length of the adhesive layer, thereby forming a mounting position (3) between the inner partition and the outer partition; a connecting member (4) is provided between the first inner partition (13) of the first conical spring assembly (1) and the second outer partition (21) of the second conical spring assembly (2); the connecting member (4) is located at the mounting position (3); the connecting member (4) includes a bolt (41) passing through the first inner partition (13) and the second outer partition (21) and a nut (42) provided on the bolt (41).

2. The separate generator elastic support spring according to claim 1, characterized in that: Mounting holes (43) for mounting the bolts (41) are provided on the first inner partition plate (13) and the second outer partition plate (21), and the central axis of the mounting hole (43) is perpendicular to the first inner partition plate (13).

3. The separate generator elastic support spring according to claim 1, characterized in that: The size of the first conical spring assembly (1) is larger than the size of the second conical spring assembly (2), so that the first inner partition (13) of the first conical spring assembly (1) can be adaptively connected to the second outer partition (21) of the second conical spring assembly (2).

4. The separate generator elastic support spring according to any one of claims 1 to 3, characterized in that: An external clamping mechanism is provided on the outer wall of the outer partition, and an internal clamping mechanism is provided on the inner wall of the inner partition. The two conical spring assemblies are connected via the external clamping mechanism and the internal clamping mechanism.

5. The separate generator elastic support spring according to claim 4, characterized in that: The external clamping mechanism includes an external step provided on the outer wall of the outer partition, and the internal clamping mechanism includes an internal step provided on the inner wall of the inner partition.

6. The separate generator elastic support spring according to claim 5, characterized in that: The outer step is configured such that a lower portion thereof is convex outward, and the inner step is configured such that an upper portion thereof is convex inward.

7. A method for setting an elastic support spring of a generator, characterized in that: According to the physical property requirements of the generator elastic support spring, multiple conical spring assemblies are selected and coaxially sleeved to form a separate generator elastic support spring according to any one of claims 1 to 6, and installed at the corresponding position of the generator.

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