Hydraulic vibration damping device

Abstract

The present invention provides a hydraulic vibration reduction device, comprising a sealing top plate, a sealing bottom plate spaced apart from the sealing top plate, and a vibration reduction mechanism, wherein the vibration reduction mechanism comprises a vibration reduction member respectively forming a sealing connection with the sealing top plate and the sealing bottom plate, and a limiting member concentrically arranged in the metal rubber spring, wherein a first liquid cavity for accommodating liquid is formed between the vibration reduction member and the limiting member, and a second liquid cavity communicating with the first liquid cavity is formed in the sealing bottom plate.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine vibration reduction, and in particular to a hydraulic vibration reduction device. Background Art

[0002] At present, with the development of wind turbines, their power increases, resulting in the elastic support of various components within them being difficult to meet the load-bearing and vibration issues under the existing installation interfaces.

[0003] In addition, in order not to affect the power generation of the generator, reduce the wear of mechanical parts and reduce the failure rate of equipment, the elastic support of the generator in the prior art often requires that the speed of the generator cannot be too high. Therefore, the elastic support of the generator is required to be able to withstand heavy loads and avoid resonance problems. However, when the traditional elastic support of the generator is subjected to heavy loads, its stiffness has tended to the nonlinear stage, resulting in the stiffness increasing exponentially, making it difficult to avoid resonance problems.

[0004] Therefore, a hydraulic vibration reduction device is provided in the art to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic vibration reduction device, which can effectively increase its own bearing capacity and avoid problems such as resonance.

[0006] According to the present invention, there is provided a hydraulic vibration reduction device, comprising a sealing top plate,

[0007] a sealing bottom plate spaced apart from the sealing top plate, and

[0008] A vibration reduction mechanism, the vibration reduction mechanism comprising a vibration reduction member respectively connected to the sealing top plate and the sealing bottom plate in a sealed manner, and a limit member coaxially arranged in the metal rubber spring,

[0009] Wherein, a first liquid cavity for containing liquid is formed between the vibration-damping component and the limiting component, and a second liquid cavity communicating with the first liquid cavity is formed in the sealing bottom plate.

[0010] In one embodiment, the vibration damping member includes a metal rubber spring and a fixing seat disposed below the metal rubber spring, wherein the fixing seat is connected to the sealing bottom plate via a first bolt.

[0011] In one embodiment, the metal rubber spring is configured as a hollow columnar structure, and the metal rubber spring is configured to be deformed under external pressure, thereby compressing the space in the first liquid chamber to allow the liquid to flow to the second liquid chamber.

[0012] In one embodiment, a plurality of spacers are arranged at intervals along the axial direction of the metal rubber spring, and the spacers are vulcanized inside the metal rubber spring.

[0013] In one embodiment, a clamping gasket configured as an annular structure and extending radially inward is provided on the inner wall of the fixing seat, and a plurality of through holes connecting the first liquid chamber and the second liquid chamber are provided on the clamping gasket.

[0014] In one embodiment, an annular step extending radially outward and used to abut against the clamping gasket is formed at the junction of the limiting member and the fixing seat.

[0015] In one embodiment, sealing rings are provided between the sealing top plate and the limiting member and between the fixing seat and the sealing bottom plate.

[0016] In one embodiment, a liquid injection hole arranged radially and communicating with the second liquid cavity is provided in the sealing bottom plate.

[0017] In one embodiment, the limiting member is fixedly connected to the sealing top plate via a second bolt, and a step for connecting the second bolt is provided on the upper end surface of the limiting member.

[0018] In one embodiment, a buffer pad is provided at the bottom of the limiting member or on the inner wall of the second liquid chamber.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] First, the present invention sets a first liquid chamber and a second liquid chamber cooperating therewith inside the metal rubber spring, which utilizes the characteristic that the metal rubber spring will deform when under pressure. Therefore, when the metal rubber spring deforms, the space volume in the first liquid chamber will be compressed, thereby pushing the fluid in the first liquid chamber to the second liquid chamber, so as to absorb the load and achieve a satisfactory load-bearing effect, thereby not only changing the damping to achieve the effect of vibration isolation and vibration reduction, but also significantly changing the overall stiffness of the hydraulic vibration reduction device.

[0021] Secondly, the present invention can more easily change the degree of extrusion inside the hydraulic vibration reduction device by injecting different initial pressures (liquid volumes) into the liquid chamber (i.e., the first liquid chamber and the second liquid chamber) to adjust the stiffness and. Through the above method, the bearing capacity of the device itself can be effectively increased under equal loads to further increase fatigue life.

[0022] Third, when the limiter is lowered to the limit position, the limiter can contact the inner wall of the second liquid chamber through the buffer pad, thereby avoiding direct hard contact between the sealing bottom plate and the limiter, so as to further protect and limit the limiter. In addition, when leakage or rubber damage occurs, the buffer pad can also bear the load, and the hydraulic vibration reduction device can have a higher safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A top view of the hydraulic vibration reduction device according to the present invention;

[0025] Figure 1a for Figure 1 A cross-sectional view at CC in FIG. 1 , which shows the structure of the hydraulic vibration reduction device according to the present invention;

[0026] Figure 1b for Figure 1 A cross-sectional view at BB in FIG.

[0027] Figure 1c for Figure 1 A cross-sectional view at AA in FIG.

[0028] Figure 2 The self-prestressing state of the hydraulic vibration reduction device according to the present invention is schematically shown;

[0029] Figure 3 The first stage working state of the hydraulic vibration reduction device according to the present invention is schematically shown;

[0030] Figure 4 The second stage working state of the hydraulic vibration reduction device according to the present invention is schematically shown;

[0031] Figure 5 The schematic diagram shows the limit working state of the hydraulic vibration reduction device according to the present invention;

[0032] Figure 6 is a comparison diagram of the stiffness curves of the hydraulic vibration reduction device according to the present invention;

[0033] Figure 7 An embodiment of the hydraulic vibration damping device according to the invention is schematically shown.

[0034] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0035] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0036] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0037] In the present invention, unless otherwise clearly stipulated and limited, terms such as "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 an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0038] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] Figure 1 FIG. 1 is a top view of a hydraulic vibration damping device 100 according to the present invention.

[0041] Figure 1a for Figure 1 2 is a cross-sectional view taken at CC in FIG. 1 , which shows the structure of the hydraulic vibration reduction device 100 according to the present invention.

[0042] like Figure 1 and Figure 1a As shown, the hydraulic vibration reduction device 100 according to the present invention mainly comprises a sealing top plate 11, a sealing bottom plate 12 spaced apart from the sealing top plate 11, and a vibration reduction mechanism disposed between the sealing top plate 11 and the sealing bottom plate 12. Preferably, the sealing top plate 11 is configured as a circular structure, and the sealing bottom plate 12 is configured as a square structure.

[0043] Preferably, the vibration reduction mechanism includes a vibration reduction member, and a sealing ring is used to form a sealed connection between the upper end surface of the vibration reduction member and the lower end surface of the sealing top plate 11, and a sealing ring is used to form a sealed connection between the lower end surface of the vibration reduction member and the upper end surface of the sealing bottom plate 12. In this way, the fluid stored in the vibration reduction member can be effectively prevented from overflowing.

[0044] In the present invention, the sealing ring includes but is not limited to a flat gasket, an O-ring, a U-ring, a rectangular ring and a special-shaped ring.

[0045] In one embodiment, Figure 1a As shown, the vibration damping member is configured as a hollow columnar structure, and the vibration damping mechanism further includes a stopper 13 concentrically arranged in the vibration damping member. Preferably, the stopper 13 is fixedly connected to the sealing top plate 11 by a second bolt 102 .

[0046] In the present invention, if Figure 1a As shown, a first liquid chamber 21 is formed in the annulus between the vibration damping member and the stopper 13, and a groove is formed in the sealing bottom plate 12, and the groove is configured as a second liquid chamber 22. Preferably, the first liquid chamber 21 and the second liquid chamber 22 can be connected through a through hole 152 (described below), and there is a certain amount of fluid in both the first liquid chamber 21 and the second liquid chamber 22 for use in subsequent vibration reduction work.

[0047] In one embodiment of the present invention, Figure 1a As shown, the vibration damper includes a metal rubber spring 14 and a fixing seat 15 disposed below the metal rubber spring 14. Preferably, the fixing seat 15 is fixed to the sealing bottom plate 12 by a first bolt 101, thereby improving the firmness between the vibration damper and the sealing bottom plate 12 to more easily provide vibration damping support.

[0048] Preferably, the metal rubber spring 14 and the fixing seat 15 are vulcanized into an integral structure to further improve the firmness and sealing of the vibration damping component.

[0049] Figure 3 The first stage working state of the hydraulic vibration damping device 100 according to the present invention is schematically shown.

[0050] Figure 4 The second stage working state of the hydraulic vibration damping device 100 according to the present invention is schematically shown.

[0051] Figure 5 The extreme working state of the hydraulic vibration damping device 100 according to the present invention is schematically shown.

[0052] In the present invention, if Figures 3 to 5 As shown, the metal rubber spring 14 is constructed as a hollow columnar structure, and the metal rubber spring 14 will deform when subjected to external pressure (i.e., downward pressure), thereby compressing the space volume in the first liquid chamber 21, thereby pushing the fluid in the first liquid chamber 21 to the second liquid chamber 22. In this way, the overall stiffness of the hydraulic vibration reduction device 100 can be significantly improved, thereby playing an effective vibration reduction and load-bearing function.

[0053] Preferably, the present invention can absorb the load by squeezing and stretching between rubber and liquid and significantly increase the rigidity of the entire device to achieve the effect of meeting the load-bearing requirements.

[0054] Preferably, in the working state, the liquid will be continuously compressed and stretched under the action of the metal rubber spring 14, and because the liquid itself has a certain viscosity, the hydraulic vibration reduction device 100 can have good damping and vibration isolation effects.

[0055] In one embodiment, the rubber in the metal rubber spring 14 can also be adjusted to a polymer material such as polyurethane according to usage conditions to achieve the effect of changing stiffness and damping, thereby significantly increasing the load-bearing capacity and vibration isolation effect of the hydraulic vibration reduction device.

[0056] In one embodiment of the present invention, Figure 1a As shown, a plurality of spaced-apart partitions 16 are provided along the axial direction of the metal rubber spring 14, and the plurality of partitions 16 are vulcanized together with the metal rubber spring 14. In other words, the partitions 16 are vulcanized inside the metal rubber spring 14. Therefore, when the metal rubber spring 14 is deformed, the metal rubber spring 14 is limited by the partitions 16, and the overall stiffness of the hydraulic vibration damping device 100 can be further improved by the combined action of the two.

[0057] Preferably, the present invention can further adjust the overall stiffness of the hydraulic vibration reduction device 100 during operation by changing the thickness of the partition plate 16 .

[0058] In one embodiment, Figure 1a As shown, a clamping gasket 151 extending radially inward is provided on the inner wall of the fixing seat 15. Preferably, the clamping gasket 151 is configured as an annular structure, and a plurality of through holes 152 arranged at intervals are provided along the circumference of the clamping gasket 151. Preferably, the through holes 152 can connect the first liquid chamber 21 with the second liquid chamber 22 in the initial state, so as to ensure that the liquid can smoothly fill the first liquid chamber 21 during injection.

[0059] Figure 2 The self-prestressed state of the hydraulic vibration damping device 100 according to the present invention is schematically shown.

[0060] In one embodiment, Figure 1a and 2 As shown, an annular step 131 extending radially outward is formed at the joint of the stopper 13 and the fixing seat 15. Preferably, when the metal rubber spring 14 is in a free state, the annular step 131 of the stopper 13 is axially abutted against the clamping gasket 151 of the fixing seat 15. Therefore, when injecting liquid, the second liquid chamber 22 must be filled first, and then the first liquid chamber 21 is filled through the through hole 152 until the hydraulic vibration damping device 100 is in a state as shown in FIG. Figure 2 Self-preloaded state shown.

[0061] After the first bolt 101 and the second bolt 102 are tightened, the metal rubber spring 14 is squeezed and deformed, and at this time, the hydraulic vibration damping device 100 is in a self-preloaded state.

[0062] In the present invention, different initial pressures (liquid volumes) can be injected into the liquid chambers (i.e., the first liquid chamber 21 and the second liquid chamber 22), thereby making it easier to change the degree of extrusion inside the hydraulic vibration reduction device 100, so as to adjust the stiffness and.

[0063] At the same time, the present invention can also achieve the purpose of changing the vibration isolation effect of the hydraulic vibration reduction device 100 by changing the viscosity and damping of the liquid.

[0064] Preferably, if Figure 1a As shown, a rubber gasket 132 is provided on the annular step 131, thereby effectively improving the wear resistance of the annular step 131 and further extending the service life of the hydraulic vibration reduction device 100. In one embodiment of the present invention, the rubber gasket 132 includes but is not limited to a flat washer, an O-ring, a U-ring, a rectangular ring and a special-shaped ring.

[0065] In the present invention, the rubber gasket has a certain amount of expansion and contraction. Therefore, when subjected to an upward tensile force, the rubber gasket can abut against the clamping gasket and can provide effective damping for the limit member by compressing its own volume, thereby being able to more easily meet the working conditions required by the upward tensile force.

[0066] Preferably, sealing rings are provided between the sealing top plate 11 and the limiting member 13 and between the fixing seat 15 and the sealing bottom plate 12 to improve the overall sealing performance of the hydraulic vibration reduction device 100 .

[0067] Figure 1b for Figure 1 Cross-sectional view at BB in FIG.

[0068] Figure 1c for Figure 1 Cross-sectional view at AA in FIG.

[0069] In one embodiment of the present invention, Figure 1a , Figure 1b and Figure 1c As shown, a liquid injection hole 121 and a sealing hole 122 are provided in the sealing bottom plate 12. Preferably, the liquid injection hole 121 and the sealing hole 122 are arranged radially, and both can be connected to the second liquid chamber 22. It is worth noting that when injecting liquid, liquid can be injected into the second liquid chamber 22 through the liquid injection hole 121, and the sealing hole 122 needs to be blocked by the third bolt 103.

[0070] Preferably, before injecting liquid, the first liquid chamber 21 and the second liquid chamber 22 are vacuumed through the injection hole 121 , and then liquid is injected into the second liquid chamber 22 through the injection hole 121 .

[0071] In one embodiment, Figure 1c As shown, radially arranged connecting holes 123 are further provided in the sealing bottom plate 12. Preferably, when multiple hydraulic vibration damping devices 100 are filled with liquid at the same time, the liquid chambers of the obtained hydraulic vibration damping devices 100 can be connected through the connecting holes 123 to achieve synchronous filling, thereby improving the filling efficiency.

[0072] In one embodiment, Figure 1a As shown, a step 17 is provided at the upper end surface of the stopper 13. Preferably, the step 17 is connected to the stopper 13, and a plurality of through holes are arranged circumferentially on the step 17. Preferably, the second bolt 102 can be inserted into the through hole to fix the sealing top plate 11, the step 17 and the stopper 13 together. Preferably, after the second bolt 102 is inserted into the through hole, the bolt head will not be higher than the sealing top plate 11, so that the sealing top plate 11 can support the generator and other equipment.

[0073] In one embodiment of the present invention, Figure 5 As shown, the hydraulic vibration reduction device 100 further includes a buffer pad 18 fixedly mounted on the bottom of the limiter 13. In the present invention, when the limiter 13 is lowered to Figure 5 In the extreme position shown, the limiting member 13 can abut against the inner wall of the second liquid chamber 22 through the buffer pad 18, thereby avoiding direct hard contact between the sealing bottom plate 12 and the limiting member 13, so as to further protect and limit the limiting member 13.

[0074] Preferably, in the extreme working state, the metal rubber spring 14 is deformed and is pressed against the side wall of the limiter 13 to the greatest extent, so as to increase the stiffness of the hydraulic vibration reduction device 100 to achieve nonlinearity.

[0075] Figure 7 An embodiment of a hydraulic vibration damping device 100 according to the present invention is schematically shown.

[0076] In other embodiments, the cushion 18 may also be Figure 7 The method shown is installed on the sealing bottom plate 12, that is, on the inner wall of the second liquid chamber 22. This method and the effect are roughly the same as the above content, but this method is simpler and easier to implement, thereby effectively reducing the construction cost.

[0077] Figure 6 1 is a comparison diagram of the stiffness curves of the hydraulic vibration reduction device 100 according to the present invention.

[0078] The figure shows the stiffness comparison between the present device and the conventional structure in the prior art. In other words, the stiffness of the device itself will gradually increase with the increase of displacement, but according to the data in the figure, the stiffness of the present device after the metal rubber spring 14 is deformed and displaced is obviously higher than that of the conventional structure. Therefore, the present device has a stronger load-bearing capacity than the prior art, and thus has a higher safety factor.

[0079] Compared with the prior art, the advantages of the present invention are:

[0080] First, the present invention sets a first liquid chamber 21 and a second liquid chamber 22 cooperating therewith inside the metal rubber spring 14, which utilizes the characteristic that the metal rubber spring 14 will deform when under pressure. Therefore, when the metal rubber spring 14 deforms, the space volume inside the first liquid chamber 21 will be compressed, thereby pushing the fluid inside the first liquid chamber 21 to the second liquid chamber 22, so as to absorb the load and achieve a satisfactory load-bearing effect, thereby not only changing the damping to achieve the effect of vibration isolation and vibration reduction, but also significantly changing the overall stiffness of the hydraulic vibration reduction device 100.

[0081] Secondly, the present invention can more easily change the degree of extrusion inside the hydraulic vibration reduction device 100 by injecting different initial pressures (liquid volumes) into the liquid chamber (i.e., the first liquid chamber 21 and the second liquid chamber 22) to adjust the stiffness and. Through the above method, the bearing capacity of the device itself can be effectively increased under equal loads to further increase fatigue life.

[0082] Third, when the limiter 13 descends to the limit position, the limiter 13 can abut against the inner wall of the second liquid chamber 22 through the buffer pad 18, thereby avoiding direct hard contact between the sealing bottom plate 12 and the limiter 13, so as to further protect and limit the limiter 13. In addition, when leakage or rubber damage occurs, the buffer pad 18 can also bear the load, and the hydraulic vibration reduction device 100 can have a higher safety factor.

[0083] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A hydraulic vibration reduction device, characterized in that: include: Sealing top plate (11), a sealing bottom plate (12) arranged at a distance from the sealing top plate (11), and a vibration reduction mechanism, wherein the vibration reduction mechanism comprises a vibration reduction member respectively connected to the sealing top plate (11) and the sealing bottom plate (12) in a sealed manner, and a limiting member (13) arranged concentrically within the vibration reduction member, A first liquid cavity (21) for accommodating liquid is formed between the vibration damping member and the limiting member (13), and a second liquid cavity (22) communicating with the first liquid cavity (21) is formed in the sealing bottom plate (12). The vibration damping member comprises a metal rubber spring (14) and a fixing seat (15) arranged below the metal rubber spring (14); a clamping gasket (151) extending radially inward and configured as an annular structure is provided on the inner wall of the fixing seat (15); an annular step (131) extending radially outward and used to abut against the clamping gasket (151) is formed at the junction of the stopper (13) and the fixing seat (15); a rubber gasket (132) is provided on the annular step (131); A buffer pad is provided at the bottom of the limiting member (13) or on the inner wall of the second liquid chamber (22); when the limiting member (13) is lowered to the limit position, the limiting member (13) can abut against the inner wall of the second liquid chamber (22) through the buffer pad. Sealing rings are provided between the sealing top plate (11) and the limiting member (13) and between the fixing seat (15) and the sealing bottom plate (12); the fixing seat (15) is connected to the sealing bottom plate (12) via a first bolt (101); the limiting member (13) is fixedly connected to the sealing top plate (11) via a second bolt (102); A liquid injection hole (121) arranged radially and connected to the second liquid chamber (22) is provided in the sealing bottom plate (12), and a connecting hole (123) arranged radially is also provided in the sealing bottom plate (12). When multiple hydraulic vibration damping devices are filled with liquid at the same time, the liquid chambers of the hydraulic vibration damping devices can be connected through the connecting hole (123) to achieve synchronous filling.

2. The hydraulic vibration reduction device according to claim 1, characterized in that: The metal rubber spring (14) is configured as a hollow columnar structure, and the metal rubber spring (14) is configured to be deformable under the action of external pressure, thereby compressing the space in the first liquid chamber (21) to allow the liquid to flow toward the second liquid chamber (22).

3. The hydraulic vibration reduction device according to claim 2, characterized in that: A plurality of spaced-apart partitions (16) are provided along the axial direction of the metal rubber spring (14), and the partitions (16) are vulcanized inside the metal rubber spring (14).

4. The hydraulic vibration reduction device according to claim 3, characterized in that: A plurality of through holes (152) connecting the first liquid chamber (21) and the second liquid chamber (22) are provided on the clamping gasket (151).

5. The hydraulic vibration damping device according to any one of claims 1 to 4, characterized in that: A step (17) for connecting the second bolt (102) is provided on the upper end surface of the limiting member (13).

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