A dry-type transformer for offshore wind turbine nacelles

Abstract

The utility model relates to offshore wind power transformer technical field, concretely relates to a kind of dry-type transformer for offshore wind turbine cabin, including transformer main body and heat dissipation mechanism;Heat dissipation mechanism includes top cover, heat exchange unit and flow guide component, top cover is fixedly connected with transformer main body, heat exchange unit is fixedly connected with top cover, flow guide component includes iron core lamination, spoiler, heat conduction connecting plate, heat conduction cover, radiating fin and shock absorber, iron core lamination is fixedly connected with transformer main body, and located in top cover, spoiler is fixedly connected with top cover, and located above iron core lamination, heat conduction connecting plate is fixedly connected with spoiler, and located above spoiler, heat conduction cover is fixedly connected with top cover, and located above heat conduction connecting plate, radiating fin is fixedly connected with heat conduction cover, shock absorber is detachably connected with transformer main body, to avoid transformer to appear over-temperature phenomenon when high load operation, effectively improve the stability and operating life of transformer equipment use.

Description

Technical Field

[0001] This utility model relates to the field of offshore wind power transformer technology, and in particular to a dry-type transformer for offshore wind turbine nacelles. Background Technology

[0002] Due to the unique operating environment of offshore wind turbines, the power transformers used for step-up and grid connection cannot be oil-immersed transformers installed outside the turbine like onshore turbines. Instead, dry-type transformers are typically installed inside the nacelle. However, conventional transformers are cooled by self-cooling or air cooling, allowing air inside the transformer casing to circulate with the air inside the nacelle. The high humidity and salt spray air from the nacelle enters the transformer casing, causing severe corrosion of the transformer's structural components and a significant reduction in insulation levels. Furthermore, conventional transformer coils are usually made of copper, which is heavy and cannot meet the weight restrictions imposed by the nacelle load.

[0003] To address the aforementioned issues, existing patent (CN202282228U) discloses a dry-type transformer for offshore wind power. The technical solution includes a high-voltage coil, a main air duct, a low-voltage coil, a guide plate, core laminations, and a cooling fan, air duct, and heat exchange device mounted on the outer casing. The high-voltage and low-voltage coils are arranged from the outside in on the core laminations, with a main air duct between them. A guide plate and a cooling fan are located at the top, and the air duct connects the outer casing and the heat exchange device. The advantages of this invention are: the dry-type transformer windings are made of aluminum, and the cooling method uses air circulation inside the casing. It is not only small in size and light in weight, but also corrosion-resistant and highly reliable, adapting to the harsh operating environment of offshore wind power.

[0004] However, the existing technologies mentioned above rely solely on cooling fans and simple air duct designs. Under high load operation, the winding temperature is prone to exceed the limit. Especially in the enclosed environment of the nacelle, heat accumulation will accelerate insulation aging and affect the transformer's lifespan. Utility Model Content

[0005] The purpose of this utility model is to provide a dry-type transformer for offshore wind turbine nacelles, which solves the technical problem that existing technologies rely solely on cooling fans and simple air duct designs, which easily lead to excessive winding temperatures during high-load operation. In particular, the heat accumulation in the enclosed environment of the nacelle can accelerate insulation aging and affect the transformer's lifespan.

[0006] To achieve the above objectives, this utility model employs a dry-type transformer for offshore wind turbine nacelles, comprising a transformer body and a heat dissipation mechanism. The heat dissipation mechanism includes a top cover, a heat exchange unit, and a current diversion assembly. The top cover is fixedly connected to the transformer body and located above it. The heat exchange unit is fixedly connected to the top cover and located outside it. The current diversion assembly includes core laminations, a baffle plate, a heat-conducting plate, a heat-conducting cover, heat dissipation fins, and a shock absorber. The core laminations are fixedly connected to the transformer body and located inside the top cover. The baffle plate is fixedly connected to the top cover and located above the core laminations. The heat-conducting plate is fixedly connected to the baffle plate and located above it. The heat-conducting cover is fixedly connected to the top cover and located above the heat-conducting plate. The heat dissipation fins are fixedly connected to the heat-conducting cover and located above it. The shock absorber is detachably connected to the transformer body and located outside it.

[0007] The airflow guiding component further includes an airflow shroud and a cooling fan. The airflow shroud is fixedly connected to the heat-conducting cover and is located outside the heat dissipation fins. The cooling fan is fixedly connected to the airflow shroud and is located above the airflow shroud.

[0008] The airflow guiding assembly further includes a telescopic cover and a connecting port. The telescopic cover is fixedly connected to the airflow shroud and is located outside the cooling fan. The connecting port is fixedly connected to the telescopic cover and is located above the telescopic cover.

[0009] The shock absorber includes a mounting frame and a shock absorber spring. The mounting frame is slidably connected to the transformer body and is located on the outside of the transformer body. The shock absorber spring is fixedly connected to the mounting frame and is located inside the mounting frame.

[0010] The shock absorber also includes a damper and a mounting plate. The damper is fixedly connected to the mounting frame and located outside the shock absorber spring. The mounting plate is fixedly connected to the shock absorber spring and located below the transformer body.

[0011] This utility model discloses a dry-type transformer for offshore wind turbine nacelles. In practical use, the heat generated by the transformer body flows upward through the core laminations. The baffle plate disrupts the direction of heat flow. The heat exchange unit extracts some heat through the baffle plate and forms a circulation within the transformer body. The baffle plate drives some heat to flow to the heat-conducting plate, and the heat is conducted to the heat dissipation fins through the heat-conducting cover for heat dissipation. This method can effectively solve the problem that the winding temperature easily exceeds the limit during high-load operation, affecting the transformer's lifespan. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a dry-type transformer for offshore wind turbine nacelles according to this utility model.

[0014] Figure 2 This is a top view of a dry-type transformer for offshore wind turbine nacelles according to this utility model.

[0015] Figure 3 This is the utility model Figure 2 A cross-sectional view of the AA line structure.

[0016] Figure 4 This is a partial structural schematic diagram of a dry-type transformer for offshore wind turbine nacelles according to this utility model.

[0017] 101-Transformer body, 102-Top cover, 103-Heat exchange unit, 104-Core laminations, 105-Break plate, 106-Heat-conducting plate, 107-Heat-conducting cover, 108-Heat dissipation fins, 109-Air duct, 110-Cooling fan, 111-Telescopic cover, 112-Connection port, 113-Mounting frame, 114-Shock-absorbing spring, 115-Damper, 116-Placement plate. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1-4 ,in Figure 1 This is a structural schematic diagram of a dry-type transformer for an offshore wind turbine nacelle according to this utility model. Figure 2 This is a top view of a dry-type transformer for an offshore wind turbine nacelle according to this utility model. Figure 3 This is the utility model Figure 2 AA-line structural cross-sectional view, Figure 4 This is a partial structural schematic diagram of a dry-type transformer for offshore wind turbine nacelles according to this utility model.

[0020] This utility model provides a dry-type transformer for offshore wind turbine nacelles, including a transformer body 101 and a heat dissipation mechanism. The heat dissipation mechanism includes a top cover 102, a heat exchange unit 103, and a current diversion assembly. The current diversion assembly includes core laminations 104, a baffle plate 105, a heat-conducting plate 106, a heat-conducting cover 107, heat dissipation fins 108, shock absorbers, a draft shroud 109, a cooling fan 110, a telescopic cover 111, and a connection port 112. The shock absorbers include a mounting frame 113, a shock-absorbing spring 114, a damper 115, and a placement plate 116. The aforementioned solution solves the problem that relying solely on a cooling fan and simple air duct design, the winding temperature is prone to exceed the limit during high-load operation. Especially in the enclosed environment inside the nacelle, heat accumulation can lead to accelerated insulation aging and affect the transformer's lifespan.

[0021] In this specific embodiment, the heat dissipation mechanism includes a top cover 102, a heat exchange unit 103, and a flow guiding assembly. The top cover 102 is fixedly connected to the transformer body 101 and is located above the transformer body 101. The heat exchange unit 103 is fixedly connected to the top cover 102 and is located outside the top cover 102. The flow guiding assembly includes core laminations 104, a baffle plate 105, a heat-conducting plate 106, a heat-conducting cover 107, heat dissipation fins 108, and vibration damping. The components include: the core laminations 104 fixedly connected to the transformer body 101 and located inside the top cover 102; the baffle plate 105 fixedly connected to the top cover 102 and located above the core laminations 104; the heat-conducting plate 106 fixedly connected to the baffle plate 105 and located above the baffle plate 105; the heat-conducting cover 107 fixedly connected to the top cover 102 and located above the heat-conducting plate 106; and the heat dissipation fins 108 and the core laminations 104 fixedly connected to the transformer body 101. The heat-conducting cover 107 is fixedly connected and located above the heat-conducting cover 107. The shock-absorbing component is detachably connected to the transformer body 101 and located on the outside of the transformer body 101. The heat exchange unit 103 has been described in the prior art CN202282228U. It is connected to the transformer body 101 through the air duct and cooperates with the external cooling equipment for heat exchange, so it will not be described in detail. The heat generated by the transformer body 101 flows upward through the core laminations 104. The baffle 105 disturbs the direction of heat flow. The heat exchange unit 103 extracts part of the heat through the baffle 105 and forms a circulation within the transformer body 101. The baffle 105 drives part of the heat to flow to the heat-conducting plate 106. The heat is conducted to the heat dissipation fins 108 through the heat-conducting cover 107 for heat dissipation. This method can effectively solve the problem that the winding temperature is prone to exceed the limit and affect the transformer life when operating under high load.

[0022] The airflow guiding assembly further includes an airflow shroud 109 and a cooling fan 110. The airflow shroud 109 is fixedly connected to the heat-conducting cover 107 and is located outside the heat dissipation fins 108. The cooling fan 110 is fixedly connected to the airflow shroud 109 and is located above the airflow shroud 109. When the cooling fan 110 operates, it draws out the heat flowing upward through the baffle 105 through the airflow shroud 109.

[0023] Secondly, the airflow diversion assembly also includes a telescopic cover 111 and a connection port 112. The telescopic cover 111 is fixedly connected to the airflow shroud 109 and is located outside the cooling fan 110. The connection port 112 is fixedly connected to the telescopic cover 111 and is located above the telescopic cover 111. The connection port 112 is connected to an external exhaust pipe, so that the heat absorbed by the cooling fan 110 is discharged to the outside after passing through the telescopic cover 111.

[0024] Meanwhile, the shock absorber includes a mounting frame 113 and a shock absorber spring 114. The mounting frame 113 is slidably connected to the transformer body 101 and is located on the outside of the transformer body 101. The shock absorber spring 114 is fixedly connected to the mounting frame 113 and is located inside the mounting frame 113. The mounting frame 113 is installed at the working position of the transformer body 101, and the shock absorber spring 114 is disposed inside the mounting frame 113.

[0025] In addition, the shock absorber also includes a damper 115 and a mounting plate 116. The damper 115 is fixedly connected to the mounting frame 113 and is located outside the shock absorber spring 114. The mounting plate 116 is fixedly connected to the shock absorber spring 114 and is located below the transformer body 101. The transformer body 101 is mounted above the mounting plate 116. The shock absorber spring 114, in conjunction with the damper 115, effectively reduces the vibration of the transformer body 101.

[0026] Using a dry-type transformer for an offshore wind turbine nacelle according to this embodiment, by setting the top cover 102, the heat exchange unit 103, and the diversion assembly, in specific use, the mounting frame 113 is installed in the working position, the transformer body 101 is installed above the placement plate 116, the heat generated by the transformer body 101 flows upward through the core laminations 104, the baffle 105 disturbs the direction of heat flow, the heat exchange unit 103 extracts part of the heat through the baffle 105 and forms a circulation within the transformer body 101, the cooling fan 110 operates, and the baffle 105... 05. Some of the heat is drawn to the heat-conducting plate 106, and then conducted to the heat dissipation fins 108 through the heat-conducting cover 107 for heat dissipation. The heat flowing upward through the baffle 105 is drawn outward through the air duct 109. The heat drawn out by the cooling fan 110 is discharged outward through the telescopic cover 111. When the wind turbine is running, the nacelle will vibrate. The shock-absorbing spring 114 and the damper 115 are used to improve the stability of the transformer body 101 during operation. This can prevent the transformer from overheating when running under high load, and effectively improve the stability and service life of the transformer equipment.

[0027] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A dry-type transformer for offshore wind turbine nacelles, comprising a transformer body, characterized in that, It also includes a heat dissipation mechanism; The heat dissipation mechanism includes a top cover, a heat exchange unit, and a flow guiding assembly. The top cover is fixedly connected to the transformer body and located above the transformer body. The heat exchange unit is fixedly connected to the top cover and located outside the top cover. The flow guiding assembly includes core laminations, a baffle plate, a heat-conducting plate, a heat-conducting cover, heat dissipation fins, and a shock absorber. The core laminations are fixedly connected to the transformer body and located inside the top cover. The baffle plate is fixedly connected to the top cover and located above the core laminations. The heat-conducting plate is fixedly connected to the baffle plate and located above the baffle plate. The heat-conducting cover is fixedly connected to the top cover and located above the heat-conducting plate. The heat dissipation fins are fixedly connected to the heat-conducting cover and located above the heat-conducting cover. The shock absorber is detachably connected to the transformer body and located outside the transformer body.

2. The dry-type transformer for offshore wind turbine nacelles as described in claim 1, characterized in that, The airflow guiding assembly also includes an airflow shroud and a cooling fan. The airflow shroud is fixedly connected to the heat-conducting cover and is located outside the heat dissipation fins. The cooling fan is fixedly connected to the airflow shroud and is located above the airflow shroud.

3. The dry-type transformer for offshore wind turbine nacelles as described in claim 2, characterized in that, The airflow guiding assembly also includes a telescopic cover and a connecting port. The telescopic cover is fixedly connected to the airflow shroud and is located outside the cooling fan. The connecting port is fixedly connected to the telescopic cover and is located above the telescopic cover.

4. The dry-type transformer for offshore wind turbine nacelles as described in claim 3, characterized in that, The shock absorber includes a mounting frame and a shock absorber spring. The mounting frame is slidably connected to the transformer body and is located on the outside of the transformer body. The shock absorber spring is fixedly connected to the mounting frame and is located inside the mounting frame.

5. The dry-type transformer for offshore wind turbine nacelles as described in claim 4, characterized in that, The shock absorber also includes a damper and a mounting plate. The damper is fixedly connected to the mounting frame and located outside the shock absorber spring. The mounting plate is fixedly connected to the shock absorber spring and located below the transformer body.

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