Separating type generator elastic supporting spring and setting method

Abstract

The invention belongs to the technical field of wind power vibration reduction, and particularly relates to a separating type generator elastic supporting spring and a setting method. The separating type generator elastic supporting spring comprises at least two conical spring assemblies which are coaxially arranged in a sleeved mode, each conical spring assembly comprises a rubber layer, and the inner side and the outer side of each rubber layer are provided with an inner conical face and an outer conical face respectively; the inner partition plate is arranged on the inner conical surface of the adhesive layer; the outer partition plate is arranged on the outer conical surface of the rubber layer, and the conical spring assemblies with different numbers and different physical characteristics have new physical characteristics after being coaxially arranged in a sleeved mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power vibration reduction, and in particular, relates to a separate generator elastic support spring and a generator elastic support spring setting method. Background Art

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

[0003] As the power generation efficiency increases, the size and weight of the generator inside the wind turbine also increases. Under the influence of the front coupling torque, the generator may vibrate violently, which will not only cause damage to the internal parts of the generator, but also damage the front coupling. Therefore, vibration reduction of wind turbine generators is of great significance.

[0004] The vibration control of the generator mainly depends on the elastic support spring of the generator, which is mainly composed of an elastomer and metal parts. Among them, the elastomer is the core component of the vibration reduction function, usually formed by vulcanizing metal rubber into a conical spring. When designing the elastic support spring of the generator, stiffness is the main parameter to be considered. Stiffness is mainly determined by factors such as the type of rubber, the thickness of the metal partition, and the structural form.

[0005] The static stiffness of the generator elastic support spring affects its deformation when it is loaded, while the dynamic stiffness determines whether the product can enable the generator to avoid the resonance zone when in normal working condition. According to experience, a generator elastic support spring with smaller stiffness is more conducive to enabling the generator to avoid the resonance zone; for the same product, when its static-dynamic ratio is consistent, the static stiffness will decrease as the dynamic stiffness decreases. In addition, as the mass of the generator is gradually increasing, the load on the generator elastic support spring increases, so its deformation when loaded is greater. The generator elastic support spring needs to have a sufficiently large allowable deformation to avoid interference. Traditional generator elastic support conical springs often face difficulties when carrying out such designs.

[0006] During production and processing, if you want to increase the thickness of the conical spring, you can only rely on opening a new vulcanization mold. The cost of opening a new mold often ranges from tens of thousands to hundreds of thousands of yuan, which is expensive. If the performance of the trial-produced conical spring does not meet the requirements after the new mold is opened, the structural plan will be terminated, and the corresponding mold will be wasted, causing huge losses.

[0007] Therefore, there is an urgent need to develop a generator elastic support spring and a generator elastic support spring setting method that can solve the above-mentioned technical problems. Summary of the invention

[0008] In view of the technical problems mentioned above, the present invention aims to provide a separate 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-mentioned technical problems.

[0010] According to the present invention, there is provided a separate generator elastic support spring, comprising at least two conical spring assemblies coaxially sleeved with each other, the conical spring assembly comprising: a rubber layer, with an inner conical surface and an outer conical surface respectively arranged on the inner and outer sides of the rubber layer; 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 of different numbers and different physical properties having 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 rubber layer, thereby forming a mounting position between the inner partition and the outer partition, and a connecting piece 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 piece is located at the mounting position.

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

[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 with 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 protrudes outward, and the inner step is configured such that the upper portion thereof protrudes 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 according to the present invention, and installed at the corresponding position of the generator.

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

[0021] The present invention changes 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 through a plurality of conical spring assemblies, it is possible to quickly combine the existing various conical spring assemblies according to the test conditions 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 the conical spring assembly can achieve technical effects such as low stiffness and increased deformability. It can effectively deal with the vibration reduction problem of high-power heavy-load generators and meet the requirements of heavy-load generators.

[0024] Traditional conical springs need to be replaced as a whole after being damaged. According to the separate generator elastic support spring provided by the present invention, the vulnerable parts can be summarized through experiments and machine verification. If it is found that the conical spring assembly located in the inner layer is easily damaged during actual use, more conical spring assemblies for setting in the inner layer can be produced. After the conical spring assembly in the inner layer is damaged, only the inner layer needs to be replaced without replacing the whole assembly, thereby saving operation and maintenance costs and replacement time costs. 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 diagrams showing various combinations of separate generator elastic support springs 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 figure:

[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. The third conical spring assembly;

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

[0038] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual 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 1Directional terms or qualifiers used in this application, "inward" refers to the direction close to the central axis of the separate generator elastic support spring, and "outward" refers to the direction away from the central axis of the separate generator elastic support spring. They are not used to define the absolute position of the components involved, but can vary according to specific circumstances.

[0041] Figure 1 The structure of the separate generator elastic support spring 100 according to the present invention is shown. Figure 1 As shown, the split generator elastic support spring 100 includes at least two conical spring components coaxially sleeved with each other. In this embodiment, the split generator elastic support spring 100 includes two coaxially sleeved conical spring components, such as Figure 1 As shown, there is a first conical spring assembly 1 and a second conical spring assembly 2 respectively.

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

[0043] The sizes of the multiple conical spring assemblies coaxially sleeved with each other gradually decrease from the outside to the inside, so that the overall structure of the separate generator elastic support spring 100 composed of the multiple conical spring assemblies is roughly conical.

[0044] The conical spring assemblies with different numbers and different physical properties are coaxially sleeved with each other to have new physical properties. The physical properties in this article are various parameters that affect the vibration reduction effect of the generator, which can be stiffness, thickness, etc.

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

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

[0047] Specifically, the first conical spring assembly 1 includes a first outer baffle 11, a first adhesive layer 12, and a first inner baffle 13, which are coaxially sleeved in sequence 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 configured to be conical, and the first inner baffle 13 is fixed on the inner conical surface of the inner side of the first adhesive layer 12 by vulcanization, and the first outer baffle 11 is fixed on the outer conical surface of the outer side of the first adhesive layer 12 by vulcanization.

[0048] The second conical spring assembly 2 comprises a second outer baffle 21, a second adhesive layer 22 and a second inner baffle 23 which are coaxially sleeved in sequence 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 configured in a conical shape, the second inner baffle 23 is fixed on the inner conical surface of the inner side of the second adhesive layer 22 by vulcanization, and the second outer baffle 21 is fixed on the outer conical surface of the outer side of the second adhesive layer 22 by vulcanization.

[0049] According to the present invention, in a preferred embodiment, the generatrix length of the inner partition and the outer partition is greater than the generatrix length of the adhesive layer. That is, in the first conical spring assembly 1, the generatrix length of the first inner partition 13 and the first outer partition 11 is greater than the generatrix length of the first adhesive layer 12. In the second conical spring assembly 2, the generatrix length of the second inner partition 23 and the second outer partition 21 is greater than the generatrix length of the second adhesive layer 22. Under this arrangement, the portion between the inner partition and the outer partition where no adhesive layer is provided can form a mounting position 3, and the mounting position 3 is used to set the 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 plate 13 of the first conical spring assembly 1 and the second outer partition plate 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, a plurality of connecting members 4 are evenly arranged in intervals along the circumferential direction 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 can make the connection between the first conical spring assembly 1 and the second conical spring assembly 2 more stable.

[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 arranged on the bolt 41. Furthermore, a mounting hole 43 for mounting the bolt 41 is arranged 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 gasket 44 is provided on the bolt 41 , and the gasket 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 plate 13 of the first conical spring assembly 1 can be adaptively connected with the second outer partition plate 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, 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, Figure 3 As shown, a first outer clamping mechanism 111 is provided on the outer wall of the first outer partition 11 of the first conical spring assembly 1, and a first inner clamping mechanism 131 is provided on the inner wall of the first inner partition 13 of the first conical spring assembly 1. A second outer clamping mechanism 211 is provided on the outer wall of the second outer partition 21 of the second conical spring assembly 2, and a second inner clamping mechanism 231 is provided on the inner wall of the second inner partition 23 of the second conical spring assembly 2. After the first conical spring assembly 1 and the second conical spring assembly 2 are coaxially sleeved, the first inner clamping mechanism 131 of the first conical spring assembly 1 is engaged with the second outer clamping mechanism 211 of the second conical spring assembly 2 to ensure good connection performance.

[0057] According to the present invention, the external clamping mechanism includes an external step provided on the outer wall of the external partition, and the external step is configured to protrude outward at the bottom. The internal clamping mechanism includes an internal step provided on the inner wall of the internal partition, and the internal step is configured to protrude inward at the top. Under this arrangement, the first internal clamping mechanism 131 of the first conical spring assembly 1 is a structure with a protrusion inward at the top, and the second external clamping mechanism 211 of the second conical spring assembly 2 is a structure with a protrusion outward at the bottom. After the first conical spring assembly 1 and the second conical spring assembly 2 are coaxially sleeved, the upper protrusion of the first internal clamping mechanism 131 of the first conical spring assembly 1 can abut against the lower protrusion of the second external clamping mechanism 211 of the second conical spring assembly 2, thereby forming a bite connection, thereby ensuring 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 a separate generator elastic support spring 100 provided by the present invention, and 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 that 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, so it is easier to avoid the resonance range. For heavy-loaded generators, large mass and small stiffness increase the deformation of the elastic support spring of the generator. Therefore, from the above description, it can be seen that heavy-loaded generators require products with small stiffness and large deformable space. The present invention connects multiple conical spring assemblies coaxially to form a separate generator elastic support spring 100, which can just meet the demand.

[0060] For traditional conical springs, the performance is 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 groups 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, it is assumed that there are two inner conical springs (second conical spring assembly 2), numbered A1 and A2. There are two outer conical springs (first conical spring assembly 1), numbered B1 and B2. By combining the inner and outer conical springs in pairs, four different types of combinations can be obtained. This makes the design of conical springs more flexible and diverse, and there is no need to redesign for each requirement.

[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 as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] Finally, it should be noted that the above is only 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 a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 arranged on the inner and outer sides of the adhesive layer; An inner partition disposed on the inner conical surface of the adhesive layer; and An outer partition disposed on the outer conical surface of the adhesive layer, The conical spring assemblies with different numbers and different physical properties have new physical properties after being coaxially sleeved with each other.

2. The separate generator elastic support spring according to claim 1, characterized in that: 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), and the first inner partition plate (13) of the first conical spring assembly (1) is adaptively connected with the second outer partition plate (21) of the second conical spring assembly (2).

3. The separate generator elastic support spring according to claim 2, characterized in that: 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, and a connecting piece (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 piece (4) is located at the mounting position (3).

4. The separate generator elastic support spring according to claim 3, characterized in that: The connecting member (4) comprises a bolt (41) passing through the first inner partition plate (13) and the second outer partition plate (21), and a nut (42) arranged on the bolt (41).

5. The separate generator elastic support spring according to claim 4, characterized in that: Mounting holes (43) for mounting the bolts (31) 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).

6. The separate generator elastic support spring according to claim 2, characterized in that: 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 with the second outer partition (21) of the second conical spring assembly (2).

7. The separate generator elastic support spring according to any one of claims 1 to 6, characterized in that: An external clamping mechanism is arranged on the outer wall of the outer partition, and an internal clamping mechanism is arranged 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.

8. The separate generator elastic support spring according to claim 7, characterized in that: The external clamping mechanism includes an external step arranged on the outer wall of the outer partition, and the internal clamping mechanism includes an internal step arranged on the inner wall of the inner partition.

9. The separate generator elastic support spring according to claim 8, characterized in that: The outer step is configured such that the lower portion thereof protrudes outward, and the inner step is configured such that the upper portion thereof protrudes inward.

10. A method for setting a generator elastic support spring, characterized in that: According to the physical property requirements of the generator elastic support spring, a plurality of conical spring assemblies are selected and coaxially sleeved to form a separate generator elastic support spring according to any one of claims 1 to 9, and installed at the corresponding position of the generator.

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