Shock-resistant transformer for offshore wind power

Abstract

The invention relates to the field of transformers, in particular to an anti-seismic transformer for offshore wind power, which comprises a transformer main body, a supporting seat, a first anti-seismic mechanism and a second anti-seismic mechanism, the first anti-seismic mechanism achieves buffering in the front-back direction through a sliding block, a compression spring and a hydraulic oil system. The second anti-seismic mechanism adopts the same structure to achieve buffering in the left-right direction. The adjusting part controls the number of connecting pipelines through the adjusting ring, and the flow limiting part adjusts the flow resistance of hydraulic oil through the gap change of the flow limiting plate and the flow limiting ring and cooperates with the compression spring to form the dynamic damping effect. According to the design, through a multidirectional anti-seismic structure, adjustable hydraulic buffering and a flexible stress mechanism, the displacement amplitude of the transformer in multidimensional vibration is remarkably reduced, rigid impact damage is avoided, the operation stability in a complex marine environment is improved, and the service life of the transformer in the complex marine environment is prolonged. The device is compact in structure, high in adaptability and capable of being widely applied to the field of offshore wind power.

Description

Technical Field

[0001] The present invention relates to the field of transformers, and in particular to an earthquake-resistant transformer for offshore wind power. Background Art

[0002] With the rapid development of offshore wind power technology, transformers, as core equipment for power transmission, are often required to operate stably and long-term in complex marine environments. However, offshore platforms are susceptible to dynamic loads such as wind, waves, and ocean currents, causing transformers to be subjected to multi-directional, low-frequency vibration shocks.

[0003] Existing seismic structures struggle to effectively attenuate multi-dimensional vibrations. Furthermore, traditional seismic devices lack adjustability and are unable to dynamically adjust buffering parameters based on external impact intensity. This can easily lead to rigid impact transmission, causing fatigue damage or failure of internal components. Summary of the Invention

[0004] In order to solve the aforementioned technical problems, the present invention provides a seismic-resistant transformer for offshore wind power. The present invention solves technical problems such as multi-dimensional vibration attenuation and fatigue damage or failure caused by rigid impact through a multi-directional seismic-resistant structure, adjustable hydraulic buffering and a flexible force-bearing mechanism. This is specifically achieved through the following technical solutions.

[0005] The present invention provides an earthquake-resistant transformer for offshore wind power generation, comprising a transformer body, a support seat, a first earthquake-resistant mechanism and a second earthquake-resistant mechanism; The support base is installed at the bottom of the transformer body, the second anti-seismic mechanism is arranged between the support base and the first anti-seismic mechanism, and a mounting plate is provided at the bottom of the first anti-seismic mechanism. The mounting plate is fixed to the ground and supports the transformer body and the support base through the first anti-seismic mechanism and the second anti-seismic mechanism; The first anti-vibration mechanism and the second anti-vibration mechanism are of the same structure arranged vertically, and are used to suppress vibration of the transformer body in the front-to-back direction and the left-to-right direction respectively; The first anti-seismic mechanism includes a mounting block and a slider slidably disposed in a sliding groove thereof, the slider being elastically connected to the mounting block via a compression spring and a piston assembly; the piston assembly comprising a piston rod, a piston, and a sealed cavity filled with hydraulic oil, the sealed cavity being formed by two symmetrical piston cavities connected via an adjusting portion and a flow limiting portion; When external vibration forces the slider and the mounting block to slide relative to each other, the hydraulic oil flows between the piston chambers on both sides, and the vibration amplitude is attenuated through the elastic reset of the compression spring and the adjustment of the flow resistance of the hydraulic oil by the flow limiting part.

[0006] Preferably, the flow limiting portion includes a connecting pipe, a mounting pipe, a flow limiting plate and a flow limiting ring; The two ends of the connecting pipe are respectively connected to the through holes of the piston chambers on both sides. The flow limiting plate is connected to the return spring through a connecting rod and forms a variable annular gap with the flow limiting ring. The flow limiting plate is driven to move by the hydraulic pressure difference to adjust the flow cross-sectional area of the hydraulic oil.

[0007] Preferably, the adjustment portion includes an adjustment ring and docking channels opened therein, the number of docking channels distributed decreases along the circumferential direction, and different numbers of docking channels are selected to be aligned with the through holes by rotating the adjustment ring to control the instantaneous flow of the hydraulic oil.

[0008] Preferably, the end surface of the adjustment ring is provided with a plurality of limiting pits, and the gear locking is achieved through the cooperation of the limiting column and the limiting spring.

[0009] Preferably, a first return spring and a second return spring are provided in the mounting tube, and the first return spring and the second return spring are fixed to both ends of the connecting rod respectively, so as to limit the displacement range of the flow limiting plate.

[0010] Preferably, in the piston assembly, the piston rod is sleeved inside the compression spring and is coaxially arranged, the piston seal is slidably arranged in the piston cavity, and the piston cavity is connected to the rotation groove through a through hole.

[0011] Preferably, the slider is fixedly connected to the mounting plate by bolts, and both ends of the compression spring are respectively fixed to the side surface of the slider and the end surface of the sliding groove.

[0012] Preferably, the adjustment ring is divided into four areas, and the number of docking channels in each area is 4, 3, 2, and 1 respectively, and the number of connected connecting pipes is adjusted by shifting the gears.

[0013] Preferably, the structure of the second anti-seismic mechanism is the same as that of the first anti-seismic mechanism, and the two are installed vertically to achieve multi-directional coordinated shock absorption.

[0014] Preferably, the hydraulic oil in the closed cavity flows in two directions when the slider is displaced, and the elastic force of the compression springs on both sides and the flow resistance of the hydraulic oil jointly suppress the transmission of vibration energy.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: 1. The present invention suppresses vibrations in the front-to-back and left-to-right directions respectively through the vertical layout of the first and second anti-vibration mechanisms, and effectively reduces the displacement amplitude of the transformer body in multi-dimensional vibration by combining the synergistic effect of hydraulic oil and springs.

[0016] 2. The regulating part of the present invention controls the number of connected pipes, and the flow limiting part changes the area of the annular gap to accurately adjust the flow rate and flow of the hydraulic oil. It can not only cope with sudden high-intensity impacts, but also adapt to continuous low-frequency vibrations, significantly improving seismic adaptability.

[0017] 3. The dual buffer mechanism of hydraulic oil and compression spring, combined with the dynamic response characteristics of the current limiting plate, converts rigid impact into flexible force, greatly reducing the instantaneous stress of the transformer's internal structure and avoiding mechanical fatigue damage.

[0018] 4. The multi-position design of the adjustment ring allows operators to adjust the number of connected pipes according to actual working conditions, flexibly matching external impacts of different intensities, and expanding the application range of the equipment in diverse offshore environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a three-dimensional diagram of a seismic-resistant transformer for offshore wind power; Figure 2 for Figure 1 Schematic diagram of partial disassembly of local structure; Figure 3 This is a schematic diagram of the first anti-seismic mechanism after partial disassembly from a first-person perspective; Figure 4 This is a schematic diagram of the first anti-seismic mechanism after partial disassembly from a second perspective; Figure 5 for Figure 3 A partial cross-sectional diagram of the central mechanism; Figure 6 for Figure 5 A stereogram from another perspective; Figure 7 It is a structural diagram of the regulating part; Figure 8 is a perspective view of the adjustment ring; Figure 9 for Figure 4 A partial enlarged view of area A in the middle.

[0021] Description of reference numerals: 101- transformer body, 102- support base, 103- mounting plate; 200 - first anti-seismic mechanism, 201 - mounting block, 202 - slider, 203 - sliding groove, 204 - compression spring, 205 - piston rod, 206 - piston, 207 - piston chamber, 208 - through hole, 209 - rotating groove; 210 - adjustment portion, 211 - adjustment ring, 212 - docking channel, 213 - limiting pit, 214 - limiting column, 215 - limiting spring; 220 - flow limiting part, 221 - connecting pipe, 222 - mounting pipe, 223 - first return spring, 224 - connecting rod, 225 - second return spring, 226 - flow limiting plate, 227 - flow limiting ring; 300-Second seismic resistance mechanism. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the present invention.

[0023] The directional terms used in the following description refer to the directions shown in the drawings and do not limit the specific structure of the present invention. It should also be noted that, in the description of the present invention, unless otherwise specified or limited, the terms "installation" and "connection" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0024] The embodiment of the present invention provides a seismic-resistant transformer for offshore wind power generation, see Figure 1 、 Figure 2 The transformer includes a transformer body 101 and a support base 102 installed at the bottom of the transformer body 101. The first anti-seismic mechanism 200 is installed on the support base 102 through the second anti-seismic mechanism 300. A mounting plate 103 is installed at the bottom of the first anti-seismic mechanism 200. The mounting plate 103 is fixed to the ground and slidably supports the transformer body 101 and the support base 102 through the first anti-seismic mechanism 200 and the second anti-seismic mechanism 300. Among them, the first anti-seismic mechanism 200 can realize the anti-seismic effect of the transformer main body 101 in the front and rear directions, and the second anti-seismic mechanism 300 can realize the anti-seismic effect of the transformer main body 101 in the left and right directions, so that when the external part encounters a large vibration and causes the mounting plate 103 to vibrate with the same amplitude, the anti-seismic effect of the first anti-seismic mechanism 200 and the second anti-seismic mechanism 300 can reduce the vibration amplitude of the transformer main body 101, reduce the impact of external shocks on the transformer main body 101, and ensure the normal operation of the transformer main body 101.

[0025] The front-to-back direction is the width direction of the support base 102 , and the left-to-right direction is the length direction of the support base 102 .

[0026] The first anti-seismic mechanism 200 and the second anti-seismic mechanism 300 are identical structures with different sizes, and are arranged vertically to achieve an anti-seismic effect in the vertical direction.

[0027] As a further explanation of the above embodiment, see Figures 2 to 5 The first anti-seismic mechanism 200 includes a mounting block 201 and a slider 202. The slider 202 is slidably arranged in a sliding groove 203 provided on the mounting block 201. The slider 202 is fixedly mounted on the mounting plate 103 by a plurality of bolts.

[0028] The side of the slider 202 is fixed to the first end of the compression spring 204, the second end of the compression spring 204 is fixed to the end face of the sliding groove 203, and the side of the slider 202 is also fixed to the first end of the piston rod 205. The piston rod 205 is sleeved inside the compression spring 204 and coaxially arranged with the compression spring 204. The second end of the piston rod 205 is coaxially fixed to the piston 206. The piston 206 is sealed and slidably arranged in the piston cavity 207 opened inside the mounting block 201. A rotation groove 209 is coaxially opened on the outside of the piston cavity 207. A plurality of through holes 208 are evenly opened along the circumference on the annular side wall between the piston cavity 207 and the rotation groove 209. The plurality of through holes 208 connect the interior of the piston cavity 207 with the rotation groove 209.

[0029] The structure consisting of the compression spring 204, the piston rod 205, the piston 206, the piston cavity 207, and the through hole 208 is symmetrically distributed in two groups about the center of the slider 202, and the corresponding through holes 208 in the two groups are sealed and connected through the adjusting part 210 and the flow limiting part 220, so that the piston cavities 207 and the through holes 208 on both sides form a mutually penetrating closed space under the connecting action of the adjusting part 210 and the flow limiting part 220, and the closed space is filled with hydraulic oil.

[0030] Among them, the adjusting part 210 is used to adjust the channels connected by the corresponding through holes 208 on both sides, and the flow limiting part 220 is used to adjust the rate at which the hydraulic oil flows between the two piston chambers 207. When the slider 202 is displaced relative to the mounting block 201 due to external impact, the hydraulic oil in the piston chamber 207 on one side flows to the piston chamber 207 on the other side through the adjusting part 210 and the flow limiting part 220. At this time, the compression spring 204 on one side is compressed and the compression spring 204 on the other side is stretched until the displacement reaches the peak value. Under the elastic force of the compression springs 204 on both sides, the slider 202 is displaced in the opposite direction, causing the hydraulic oil to flow in the opposite direction.

[0031] During the flow of the hydraulic oil, the regulating part 210 limits the flow rate of the hydraulic oil on both sides by adjusting the number of connected pipes, while the flow limiting part 220 provides resistance to the flow of the hydraulic oil by timely adjusting the cross-sectional area of the pipes, thereby reducing the relative sliding stroke and the number of relative sliding between the slider 202 and the mounting block 201; in addition, due to the buffering effect of the compression spring 204 and the hydraulic oil, the transformer body 101 installed on the support seat 102 has a certain hysteresis when it is displaced, and the force driving the transformer body 101 to move is a flexible force, thereby avoiding structural damage caused by the sudden rigid movement of the transformer body 101. Combining the above two points, the anti-seismic effect of the transformer body 101 is achieved.

[0032] As a further explanation of the above embodiment, see Figure 3 、 Figure 4 、 Figure 9 The flow limiting part 220 includes a connecting pipe 221, a first end of the connecting pipe 221 is connected to the through hole 208 on one side, and a second end of the connecting pipe 221 is connected through the through hole 208 on the other side of the adjusting part 210. The middle part of the connecting pipe 221 is coaxially arranged with the mounting pipe 222, and the mounting pipe 222 is opened inside the mounting block 201.

[0033] The first end of the mounting tube 222 is fixed to the first end of the first return spring 223, the second end of the first return spring 223 is fixed to the first end of the connecting rod 224, the second end of the connecting rod 224 is fixed to the first end of the second return spring 225, and the second end of the second return spring 225 is fixed to the second end of the mounting tube 222.

[0034] A limiting plate 226 is coaxially fixed to the middle of the connecting rod 224, and a limiting ring 227 protruding inward is coaxially fixed to the middle of the mounting tube 222. The inner ring of the limiting ring 227 and the outer ring of the limiting plate 226 form an annular gap. When the hydraulic oil does not flow in the mounting tube 222, the limiting plate 226 and the limiting ring 227 are aligned.

[0035] The annular gap formed by the flow limiting plate 226 and the flow limiting ring 227 in the above structure reduces the cross-sectional area of the hydraulic oil flowing in the mounting tube 222. Therefore, when the hydraulic oil is suddenly increased in flow speed by an external force, the hydraulic pressure difference on both sides of the flow limiting plate 226 pushes the flow limiting plate 226 to deviate from the equilibrium position. At this time, the flow limiting plate 226 and the flow limiting ring 227 are no longer aligned, thereby increasing the annular gap between the flow limiting plate 226 and the flow limiting ring 227, which can correspondingly meet the rapid flow requirements of the hydraulic oil.

[0036] Therefore, during the reciprocating flow of the hydraulic oil, each change in the flow direction needs to overcome the resistance generated by the elastic force of the second return spring 225 and the first return spring 223. This resistance limits the flow speed of the hydraulic oil in the mounting tube 222, thereby quickly reducing the relative movement stroke of the mounting block 201 and the slider 202, so that the interaction between the mounting block 201 and the slider 202 is quickly attenuated, further reducing the number of relative sliding times between the two.

[0037] As a further explanation of the above embodiment, see Figure 7 、 Figure 8 The adjustment portion 210 includes an adjustment ring 211 and a docking channel 212 that is non-uniformly opened inside the adjustment ring 211. The docking channel 212 connects the inner ring surface and one side end surface of the adjustment ring 211. The docking channel 212 can be aligned with and connected to the through hole 208 at one end of the inner ring surface of the adjustment ring 211, and can be aligned with and connected to the connecting pipe 221 at one end of the end surface of the adjustment ring 211.

[0038] A number of limiting pits 213 are evenly arranged along the circumferential direction on the other side end face of the adjustment ring 211, and the first end of the limiting column 214 can be embedded in the limiting pit 213. The second end of the limiting column 214 is fixed to the first end of the limiting spring 215, and the second end of the limiting spring 215 is fixed to the bottom end of the blind hole formed in the mounting block 201, and the limiting column 214 is slidably arranged in the blind hole.

[0039] like Figure 8 As shown, taking the number of a group of through holes 208 as 4 as an example, the adjustment ring 211 is evenly divided into 4 areas along the circumferential direction, and the number of docking channels 212 set in each area is different. The first area is provided with 4 docking channels 212, which are respectively arranged at positions 1, 2, 3, and 4 of the area, the second area is provided with 3 docking channels 212, which are respectively arranged at positions 1, 2, and 3 of the area, the third area is provided with 2 docking channels 212, which are respectively arranged at positions 1 and 2 of the area, and the fourth area is provided with 1 docking channel 212, which is set at position 1 of the area, and positions 1, 2, 3, and 4 of each area are arranged according to Figure 8 The counterclockwise direction in the .

[0040] With the above structure, when the adjustment ring 211 is rotated, when position 1 of each area is aligned with the through hole 208, all four connecting tubes 221 are connected; when position 2 of each area is aligned with the through hole 208, three connecting tubes 221 are connected; when position 3 of each area is aligned with the through hole 208, two connecting tubes 221 are connected; and when position 4 of each area is aligned with the through hole 208, one connecting tube 221 is connected. Therefore, by rotating the adjustment ring 211, the number of connected connecting tubes 221 can be controlled, thereby controlling the instantaneous flow rate of hydraulic oil between the two sets of piston chambers 207 caused by external impact.

[0041] In combination with the above functions, the operator can adjust the gear position by rotating the adjustment ring 211 according to the specific degree of external impact to meet the seismic requirements of the transformer body 101, thereby adapting to various working environments.

[0042] While the embodiments of the present invention are described above, these embodiments do not exhaustively describe all details, nor do they limit the present invention to only specific embodiments. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to make good use of the present invention and its modifications and uses. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A seismic-resistant transformer for offshore wind power, characterized in that: It comprises a transformer body (101), a support base (102), a first anti-seismic mechanism (200) and a second anti-seismic mechanism (300); The support seat (102) is installed at the bottom of the transformer body (101); the second anti-seismic mechanism (300) is arranged between the support seat (102) and the first anti-seismic mechanism (200); a mounting plate (103) is provided at the bottom of the first anti-seismic mechanism (200); the mounting plate (103) is fixed to the ground, and supports the transformer body (101) and the support seat (102) through the first anti-seismic mechanism (200) and the second anti-seismic mechanism (300); The first anti-vibration mechanism (200) and the second anti-vibration mechanism (300) are of the same structure arranged vertically, and are used to suppress vibration of the transformer body (101) in the front-to-back direction and the left-to-right direction, respectively; The first anti-vibration mechanism (200) comprises a mounting block (201) and a slider (202) slidably disposed in a sliding groove (203) thereof, wherein the slider (202) is elastically connected to the mounting block (201) via a compression spring (204) and a piston assembly; the piston assembly comprises a piston rod (205), a piston (206), and a sealed cavity filled with hydraulic oil, wherein the sealed cavity is formed by two symmetrical piston cavities (207) connected via an adjusting portion (210) and a flow limiting portion (220); When external vibration forces the slider (202) and the mounting block (201) to slide relative to each other, the hydraulic oil flows between the piston chambers (207) on both sides, and the vibration amplitude is attenuated by the elastic reset of the compression spring (204) and the adjustment of the flow resistance of the hydraulic oil by the flow limiting part (220).

2. The earthquake-resistant transformer for offshore wind power according to claim 1, characterized in that: The flow limiting portion (220) comprises a connecting pipe (221), a mounting pipe (222), a flow limiting plate (226), and a flow limiting ring (227); The two ends of the connecting pipe (221) are respectively connected to the through holes (208) of the piston chambers (207) on both sides. The flow limiting plate (226) is connected to the return spring through the connecting rod (224) and forms a variable annular gap with the flow limiting ring (227). The flow limiting plate (226) is driven to move by the hydraulic pressure difference to adjust the flow cross-sectional area of the hydraulic oil.

3. The earthquake-resistant transformer for offshore wind power according to claim 2, characterized in that: The regulating portion (210) comprises an regulating ring (211) and docking channels (212) provided therein. The number of the docking channels (212) decreases along the circumferential direction. By rotating the regulating ring (211), different numbers of docking channels (212) are selected to align with the through hole (208) to control the instantaneous flow of the hydraulic oil.

4. The earthquake-resistant transformer for offshore wind power according to claim 3, characterized in that: The end surface of the adjustment ring (211) is provided with a plurality of limiting pits (213), and the gear position locking is achieved through the cooperation of the limiting column (214) and the limiting spring (215).

5. The earthquake-resistant transformer for offshore wind power according to claim 2, characterized in that: A first return spring (223) and a second return spring (225) are provided in the mounting tube (222), and the two are respectively fixed to both ends of the connecting rod (224) and are used to limit the displacement range of the flow limiting plate (226).

6. The earthquake-resistant transformer for offshore wind power according to claim 1, characterized in that: In the piston assembly, the piston rod (205) is sleeved inside the compression spring (204) and is coaxially arranged. The piston (206) is sealed and slidably arranged in the piston cavity (207). The piston cavity (207) is connected to the rotation groove (209) through the through hole (208).

7. The earthquake-resistant transformer for offshore wind power according to claim 1, characterized in that: The slider (202) is fixedly connected to the mounting plate (103) via bolts, and the two ends of the compression spring (204) are respectively fixed to the side surface of the slider (202) and the end surface of the sliding groove (203).

8. The earthquake-resistant transformer for offshore wind power according to claim 3, characterized in that: The adjustment ring (211) is divided into four areas, and the number of docking channels (212) in each area is 4, 3, 2, and 1, respectively. The number of connected connecting pipes (221) is adjusted by shifting the gears.

9. The earthquake-resistant transformer for offshore wind power according to claim 1, characterized in that: The structure of the second anti-seismic mechanism (300) is the same as that of the first anti-seismic mechanism (200), and the two are installed vertically to achieve multi-directional coordinated shock absorption.

10. The earthquake-resistant transformer for offshore wind power according to claim 1, characterized in that: The hydraulic oil in the sealed cavity flows in both directions when the slider (202) is displaced, and the elastic force of the compression springs (204) on both sides and the flow resistance of the hydraulic oil jointly suppress the transmission of vibration energy.

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