Offshore semi-direct-drive box transformer substation upward-moving wind turbine generator cabin

Abstract

The utility model discloses an offshore semi-direct-drive box transformer substation upward-moving wind turbine generator cabin which comprises a cabin body, a semi-direct-drive transmission chain, a transformer, a converter, a control cabinet, a heat dissipation module and a hoisting opening. The semi-direct-drive transmission chain is positioned at the front part of the cabin body; the transformer is positioned at the rear part of the cabin body; the converter and the control cabinet are located on the two sides of the middle of the cabin body respectively. The heat dissipation module is located on the top side of the rear portion of the cabin body. And the hoisting opening is positioned at the top of the cabin body between the semi-direct-drive transmission chain and the transformer. According to the utility model, the semi-direct-drive transmission chain is adopted, so that the length of the cabin body can be shortened; a natural cooling type water cooling radiator is adopted, so that self power consumption can be reduced, and reliability can be guaranteed; meanwhile, the positions of the single-cabinet converter and the 66KV dry-type transformer are reasonably arranged in the cabin body, the size of the cabin can be reduced, the cost of electrical components and structural parts is reduced, and therefore the cost of the unit is reduced.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of wind power, and in particular to an offshore semi-direct drive box-type up-movable wind turbine unit nacelle. Background Art

[0002] The wind turbine nacelle is the most critical system in a wind turbine. Core components such as the generator, gearbox, and nacelle control cabinet are essentially housed within the nacelle. The nacelle is the turbine's power generation system, providing support and external safety protection for the equipment installed within. In offshore wind turbines, to reduce cable costs and power loss, a solution is adopted, where the converter and transformer are located inside the nacelle.

[0003] With the continuous growth of offshore wind turbine capacity, the 33kV voltage level for on-site submarine cables has gradually become a bottleneck in submarine cable system design. In recent years, 66kV transformer solutions have been adopted, paired with single-cabinet full-power converters. In existing technology, the layout of the nacelle for upwardly mobile box-type transformers of 8MW and above requires comprehensive consideration of factors such as drive train length, unit radiator placement, converter placement, and transformer placement. 66kV dry-type transformers are significantly larger and heavier than traditional 33kV transformers. Placing them in the nacelle presents the challenge of optimally arranging them to minimize nacelle size and structural weight. Large-capacity full-power converters are available in single-cabinet and dual-cabinet options. Single-cabinet solutions offer lower costs, but also present the challenge of optimally arranging them to minimize nacelle size and structural weight. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model provides an offshore semi-direct drive box-type up-moving wind turbine unit nacelle with a compact nacelle structure.

[0005] In order to solve the above technical problems, the technical solutions proposed by the present invention are as follows:

[0006] A nacelle for an offshore semi-direct drive box-type up-shift wind turbine generator set comprises a nacelle, a semi-direct drive transmission chain, a transformer, a converter, a control cabinet, a heat dissipation module and a lifting port; the semi-direct drive transmission chain is located at the front of the nacelle; the transformer is located at the rear of the nacelle; the converter and the control cabinet are respectively located on both sides of the middle of the nacelle; the heat dissipation module is located on the top side of the rear of the nacelle; and the lifting port is located at the top of the nacelle between the semi-direct drive transmission chain and the transformer.

[0007] As a further improvement of the above technical solution:

[0008] A front frame is provided at the front of the cabin body, and a rear frame is provided at the rear of the cabin body. The semi-direct drive transmission chain is located on the front frame, and the transformer is located on the rear frame. The front frame and the rear frame are firmly connected.

[0009] The front frame and the rear frame are fastened together by welding or bolts.

[0010] An independent base is provided on the rear frame, and the transformer is located on the base.

[0011] The heat dissipation module is a natural cooling water-cooling radiator.

[0012] The converter is a single-cabinet converter.

[0013] The transformer is a dry-type transformer.

[0014] The escape hatch and the lifting hatch of the cabin are used together.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model adopts a semi-direct drive transmission chain, which can shorten the length of the cabin; adopts a natural cooling water-cooled radiator, which can reduce self-consumption of electricity and ensure reliability; at the same time, a single-cabinet converter and a 66KV dry-type transformer are arranged in the cabin, which can reduce the size of the cabin and reduce the cost of electrical components and structural parts, thereby reducing the cost of the unit.

[0017] This new design places the converter on one side of the central drive train, with the cabin control cabinet and water-cooling pump station located on the other side. Because this arrangement increases the cabin width, the cabin cover is partially widened in this area. This cabin layout effectively reduces cabin length and structural weight, while also shortening cabin wiring paths.

[0018] The elastic support points of the nacelle cover and the frame of the utility model are obtained by modifying the parting surface of the upper and lower shells of the nacelle cover, reducing the bending moment that needs to be borne on one side of the bottom, evenly distributing 10 support points, and increasing the force-bearing area of the embedded parts in the support points, thereby achieving uniform distribution of 10 support points on one side on the frame and truss.

[0019] The natural air-cooling radiator of the utility model is placed at the rear position on the top of the nacelle cover, which does not affect the nacelle turning device and the replacement of the gearbox and generator in and out of the nacelle, and reduces the influence of the hub and blade wake on the air intake of the natural heat dissipation cooler. The cabin is completely sealed, effectively shortening the length of the cabin while ensuring the cabin's resistance to salt spray corrosion; the escape hatch and the hanging hatch are integrated into a design, located between the transmission chain and the transformer, do not occupy the cabin space, have a compact structure, and further shorten the length of the frame.

[0020] In the cabin layout design, the utility model comprehensively optimizes the arrangement and design of the converter, control cabinet, transformer, natural air cooling radiator, escape hatch and hanging hatch, and cabin cover support position, which can achieve the purpose of shortening the cabin width and length and reducing the number of internal cabin structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the cabin layout of the present utility model.

[0022] Figure 2 This is a structural diagram of the frame in the cabin of the present invention.

[0023] Figure 3 This is a diagram of the arrangement of the nacelle cover support points and the water-cooled radiator in the present invention.

[0024] Legend: 1. Cabin; 101. Front frame; 102. Rear frame; 103. Base; 104. Bracket; 105. Support point; 2. Semi-direct drive transmission chain; 3. Transformer; 4. Converter; 5. Control cabinet; 6. Cooling module; 7. Lifting port. DETAILED DESCRIPTION

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

[0026] like Figure 1 As shown, the offshore semi-direct drive box-type up-moving wind turbine nacelle of an embodiment of the present invention includes a nacelle 1, a semi-direct drive transmission chain 2, a transformer 3, a converter 4, a control cabinet 5, a heat dissipation module 6, an escape hatch and a lifting port 7; the semi-direct drive transmission chain 2 is located at the front of the nacelle 1; the transformer 3 is located at the rear of the nacelle 1; the converter 4 and the control cabinet 5 are respectively located on both sides of the middle of the nacelle 1; the heat dissipation module 6 is located on the top side of the rear of the nacelle 1; the escape hatch and the lifting port 7 are used together, and are located at the top of the nacelle 1 between the semi-direct drive transmission chain 2 and the transformer 3.

[0027] like Figure 2 As shown, a front frame 101 is provided at the front of the cabin 1, and a rear frame 102 is provided at the rear of the cabin 1. The semi-direct drive transmission chain 2 is located on the front frame 101, and the transformer 3 is located on the rear frame 102. The front frame 101 and the rear frame 102 are connected by welding or bolts. In addition, an independent base 103 is provided on the rear frame 102, and the transformer 3 is located on the independent base 103. Brackets 104 are provided on both sides of the rear frame 102, and the converter 4 and control cabinet 5 are respectively located on the corresponding brackets 104.

[0028] Specifically, the heat dissipation module 6 is a natural cooling water cooling radiator, such as Figure 3 As shown; transformer 3 is a 66KV dry-type transformer; converter 4 is a single-cabinet converter.

[0029] The utility model innovatively arranges a semi-direct drive transmission chain 2, a cabin water cooling system, a 66KV dry-type transformer 3 and a single full-power converter 4 in the cabin, and achieves a compact cabin layout, small size, light structural parts and good maintainability. This is an industry first and has significant innovative significance.

[0030] The utility model adopts a semi-direct drive transmission chain, which can shorten the length of the cabin 1; adopts a natural cooling water-cooled radiator, which can reduce self-consumption of electricity and ensure reliability; at the same time, a single-cabinet converter 4 and a 66KV dry-type transformer 3 are arranged in the cabin 1, which can reduce the size of the cabin and reduce the cost of electrical components and structural parts, thereby reducing the cost of the unit.

[0031] For offshore wind turbines larger than 8MW, the increased power of doubly-fed transmission chains can lead to excessive gearbox loads, complex designs, and susceptibility to damage. The use of a semi-direct drive transmission chain effectively reduces unit length. For an equivalent 8.5MW unit, the nacelle of the semi-direct drive transmission chain is only 7.5 meters long, while for a doubly-fed unit, it is over 10 meters. This significantly shortens the frame and nacelle length.

[0032] The size of the 66kV transformer 3 is about twice that of the traditional 35kV transformer 3. The transformer 3 is arranged at the rear of the nacelle (behind the transmission chain) and is supported by an independent transformer 3 base 103. This allows the transformer 3 to be self-maintained in the wind farm without the need for a sea crane, significantly reducing potential transformer 3 replacement costs.

[0033] The utility model places the converter 4 on one side of the central transmission chain, with the nacelle control cabinet 5 and other equipment, such as the water-cooling pump station, located on the other side. Because this arrangement increases the nacelle's width, the nacelle cover is partially widened in this area. This nacelle layout effectively reduces nacelle length and structural weight, while also shortening nacelle wiring paths.

[0034] like Figure 3 As shown, the elastic support points of the nacelle cover and the frame of the utility model are realized by modifying the parting surface of the upper and lower shells of the nacelle cover, reducing the bending moment that needs to be borne on one side of the bottom, evenly distributing 10 support points, and increasing the stress-bearing area of the embedded parts in the support points, so that the 10 support points on one side are evenly distributed on the frame and truss.

[0035] like Figure 3 As shown, the natural air cooling radiator of the present invention is placed at the rear position on the top of the nacelle cover, which does not affect the nacelle turning device and the replacement of the gearbox and generator in and out of the nacelle, and reduces the influence of the hub and blade wake on the air intake of the natural heat dissipation cooler. The cabin is completely sealed, effectively shortening the length of the nacelle while ensuring the cabin's resistance to salt spray corrosion; the escape hatch and the hanging hatch are integrated into a design and are located between the transmission chain and the transformer 3, without occupying the cabin space. The structure is compact and the length of the frame is further shortened.

[0036] In the cabin layout design, the utility model comprehensively optimizes the arrangement and design of the converter 4, the control cabinet 5, the transformer 3, the natural air cooling radiator, the escape hatch and the hanging hatch, and the cabin cover support position, thereby achieving the purpose of shortening the cabin width and length and reducing the number of internal cabin structural parts.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. An offshore semi-direct drive box-type wind turbine nacelle with upward displacement, characterized in that: The invention comprises a cabin (1), a semi-direct drive transmission chain (2), a transformer (3), a converter (4), a control cabinet (5), a heat dissipation module (6) and a lifting port (7); the semi-direct drive transmission chain (2) is located at the front of the cabin (1); the transformer (3) is located at the rear of the cabin (1); the converter (4) and the control cabinet (5) are respectively located on both sides of the middle of the cabin (1); the heat dissipation module (6) is located at the top side of the rear of the cabin (1); and the lifting port (7) is located at the top of the cabin (1) between the semi-direct drive transmission chain (2) and the transformer (3).

2. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 1 is characterized in that: The front portion of the cabin body (1) is provided with a front frame (101), the rear portion of the cabin body (1) is provided with a rear frame (102), the semi-direct drive transmission chain (2) is located on the front frame (101), the transformer (3) is located on the rear frame (102), and the front frame (101) and the rear frame (102) are tightly connected.

3. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 2 is characterized in that: The front frame (101) and the rear frame (102) are connected by welding or bolt fastening.

4. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 2 or 3, characterized in that: An independent base (103) is provided on the rear frame (102), and the transformer (3) is located on the base (103).

5. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 1, 2 or 3, characterized in that: The heat dissipation module (6) is a natural cooling water-cooling radiator.

6. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 1, 2 or 3, characterized in that: The converter (4) is a single-cabinet converter.

7. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 1, 2 or 3, characterized in that: The transformer (3) is a dry-type transformer.

8. The offshore semi-direct drive box-type up-moving wind turbine nacelle according to claim 1, 2 or 3, characterized in that: The escape hatch of the cabin is used in conjunction with the hoisting hatch (7).

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