A new type of engine room control dry-type transformer

Abstract

The utility model discloses a novel machine cabin control dry-type transformer, including three phase coil, iron core, upper clamp piece and lower clamp piece, high voltage coil and low voltage coil among three phase coil adopt the structure of winding together. This machine cabin control dry-type transformer complies with the tension rebound phenomenon after wire winding, and the four edges of three phase coil are wound into arc edges, and the four corners are wound into circular arc corners, so that three phase coil is wound into eight continuous circular arcs, and the inner side of arc edge of three phase coil is provided with support plate between iron core, and the inner side of circular arc corner of three phase coil is provided with angle support piece between iron core, and the position of three phase coil relative to iron core is accurately fixed through mechanical constraint, and the vibration or deformation of three phase coil under the action of electromagnetic force is limited.

Description

Technical Field

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

[0002] The nacelle control transformer mainly refers to a special transformer used in the nacelle of a wind turbine. It is mainly used to convert the low voltage (such as 1140V, 690V) output by the wind turbine into the voltage required by the converter system, control system and auxiliary equipment in the nacelle, so as to ensure the normal operation of the equipment.

[0003] Due to the harsh environment of offshore wind turbine nacelles, transformers need to have high impact resistance and corrosion resistance. In order to adapt to the limited space of the nacelle, the structural design of the control transformer needs to be compact, small in size, light in weight, easy to install and maintain, and have a high power density, so as to provide a large output power within a limited volume.

[0004] Controlling the tension of the winding wire in conventional rectangular coils is relatively difficult. Insufficient tension will result in loose coil winding, gaps between coils, and ultimately cause the coil size to exceed the process requirements. Excessive tension may cause stress concentration at the four corners of the coil, leading to warping or wire deformation. Furthermore, excessive tension may cause the wire to be subjected to tensile forces exceeding its yield strength during winding, which may cause wear on the wire surface and localized tensile deformation.

[0005] If the coil tension of the engine room control transformer is uneven or insufficient, the internal conductors are prone to loosening or sagging, leading to a loose overall structure. In harsh environments such as at sea, this can cause coil displacement or deformation, reducing the transformer's stability. Utility Model Content

[0006] The purpose of this invention is to provide a novel dry-type transformer for cabin control, in order to overcome the deficiencies in the existing technology.

[0007] To solve the above-mentioned technical problems, this utility model provides a novel dry-type transformer for engine room control, including a three-phase coil, an iron core, an upper clamp, and a lower clamp; The high-voltage coil and the low-voltage coil in the three-phase coil adopt a combined winding structure; The three-phase coil is wound into arc-shaped sides, including long arc sides, short arc sides, and rounded corners, so that the three-phase coil is wound into eight continuous arcs. A support plate is provided between the inner sides of the arc-shaped long side and the arc-shaped short side of the three-phase coil and the iron core, while a corner brace is provided between the inner side of the arc-shaped corner of the three-phase coil and the iron core.

[0008] Preferably, the three-phase coil is installed inside the housing, and its bottom is fixedly installed on the base by the lower clamp.

[0009] Preferably, the three-phase coil is provided with an internal pull screw along its axial direction, and the two ends of the internal pull screw extend into the upper clamp and the lower clamp respectively for fixation.

[0010] Preferably, the internal pull screw is provided with multiple screws, which are respectively arranged on both sides of the three-phase coil and in the interphase part.

[0011] Preferably, the three-phase coil is further provided with an external pull screw along its axial direction. One end of the external pull screw is fixedly connected to the upper clamp, and the other end is fixedly connected to the top plate of the outer casing.

[0012] Preferably, the end of the external pull screw extending out of the top plate of the outer casing is connected to a lifting ring.

[0013] Preferably, at least one through-bolt is horizontally arranged in the upper clamp and the lower clamp, and the through-bolt passes through the iron core in a horizontal direction.

[0014] Preferably, at least one side screw is horizontally arranged in the upper clamp and the lower clamp, and the side screw is symmetrically arranged on both sides of the iron core.

[0015] Preferably, after the three-phase coil is wound, the upper and lower ends of the coil are sealed with epoxy resin and then baked in a curing oven to make the three-phase coil a closed rigid body.

[0016] Compared with the prior art, the beneficial effects of this utility model are: The cabin control dry-type transformer adapts to the tension rebound phenomenon after the conductor is wound, and winds the four sides of the three-phase coil into arc-shaped edges and the four corners into rounded corners, so that the three-phase coil is wound into eight continuous arcs. Furthermore, a support plate is set between the inner side of the arc-shaped edge of the three-phase coil and the iron core, and a corner brace is set between the inner side of the rounded corner of the three-phase coil and the iron core. Through mechanical constraints, the position of the three-phase coil relative to the iron core is precisely fixed, limiting the vibration or deformation of the three-phase coil under the action of electromagnetic force. Attached Figure Description

[0017] Figure 1 This is a front view of the novel dry-type transformer for cabin control provided by this utility model; Figure 2 This is a side view of the novel cabin control dry-type transformer provided by this utility model; Figure 3 This is a schematic diagram of the coil structure of the novel dry-type transformer for cabin control provided by this utility model; Figure 4 yes Figure 3 A schematic diagram of the connection structure between the intermediate coil and the iron core.

[0018] In the diagram: 1. Three-phase coil; 101. Long arc side; 102. Short arc side; 103. Rounded corner; 2. Iron core; 3. Upper clamp; 4. Lower clamp; 5. Support plate; 6. Angle brace; 7. Outer shell; 8. Base; 9. Inner pull screw; 10. Outer pull screw; 11. Lifting eye; 12. Through-core screw; 13. Side screw. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0022] This utility model provides a novel dry-type transformer for engine room control. Please refer to [link / reference]. Figure 1 and Figure 2 It includes a three-phase coil 1, an iron core 2, an upper clamp 3, and a lower clamp 4; further, please refer to Figure 3 and Figure 4The high-voltage coil and low-voltage coil in the three-phase coil 1 adopt a combined winding structure, thereby improving the mechanical performance and temperature rise control capability of the transformer. The four sides of the three-phase coil 1 are wound into arc-shaped sides, including an arc-shaped long side 101, an arc-shaped short side 102, and rounded corners 103, so that the three-phase coil 1 is wound into eight continuous arcs. A support plate 5 is provided between the inner side of the arc-shaped long side 101 and the arc-shaped short side 102 of the three-phase coil 1 and the iron core 2, and a corner brace 6 is provided between the inner side of the rounded corners 103 of the three-phase coil 1 and the iron core 2. The position of the three-phase coil 1 relative to the iron core 2 is precisely fixed by mechanical constraint, limiting the vibration or deformation of the three-phase coil 1 under the action of electromagnetic force.

[0023] For details, please continue reading. Figure 1 and Figure 2 The three-phase coil 1 is installed inside the housing 7, and its bottom is fixedly installed on the base 8 by the lower clamp 4.

[0024] Furthermore, the three-phase coil 1 is provided with an inner pull screw 9 along its axial direction. The two ends of the inner pull screw 9 extend into the upper clamp 3 and the lower clamp 4 respectively for fixation. Moreover, there are multiple inner pull screws 9, which are respectively arranged on both sides of the three-phase coil 1 and in the interphase positions.

[0025] Furthermore, the three-phase coil 1 is also provided with an external pull screw 10 along its axial direction. One end of the external pull screw 10 is fixedly connected to the upper clamp 3, and the other end is fixedly connected to the top plate of the outer shell 7.

[0026] In this embodiment, the end of the external pull screw 10 extending out of the top plate of the outer casing 7 is connected to a lifting ring 11 for lifting the entire nacelle control dry-type transformer.

[0027] Specifically, at least one through-core screw 12 is horizontally arranged in the upper clamp 3 and the lower clamp 4, and the through-core screw 12 passes through the iron core 2 in a horizontal direction.

[0028] Furthermore, at least one side screw 13 is horizontally arranged in the upper clamp 3 and the lower clamp 4, and the side screw 13 is symmetrically arranged on both sides of the iron core 2.

[0029] In this embodiment, after the three-phase coil 1 is wound, epoxy resin is used to seal the upper and lower ends of the coil, and then it is baked in a curing oven to make the three-phase coil 1 a closed rigid body with strong resistance to sudden short circuits and good moisture resistance.

[0030] The cabin control dry-type transformer adapts to the tension rebound phenomenon after the conductor is wound, and winds the four sides of the three-phase coil into arc-shaped edges and the four corners into rounded corners, so that the three-phase coil is wound into eight continuous arcs. Furthermore, a support plate is set between the inner side of the arc-shaped edge of the three-phase coil and the iron core, and a corner brace is set between the inner side of the rounded corner of the three-phase coil and the iron core. Through mechanical constraints, the position of the three-phase coil relative to the iron core is precisely fixed, limiting the vibration or deformation of the three-phase coil under the action of electromagnetic force.

[0031] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A novel dry-type transformer for engine room control, comprising a three-phase coil (1), an iron core (2), an upper clamp (3), and a lower clamp (4); characterized in that, The high-voltage coil and low-voltage coil in the three-phase coil (1) adopt a combined winding structure; The three-phase coil (1) is wound into arc-shaped sides, including arc-shaped long side (101), arc-shaped short side (102) and rounded corners (103) at the four corners, so that the three-phase coil (1) is wound into eight continuous arcs. A support plate (5) is provided between the inner side of the arc-shaped long side (101) and the arc-shaped short side (102) of the three-phase coil (1) and the iron core (2), while a corner brace (6) is provided between the inner side of the arc-shaped corner (103) of the three-phase coil (1) and the iron core (2).

2. The novel dry-type transformer for engine room control as described in claim 1, characterized in that, The three-phase coil (1) is installed inside the housing (7), and its bottom is fixedly installed on the base (8) by the lower clamp (4).

3. A novel dry-type transformer for engine room control as described in claim 2, characterized in that, The three-phase coil (1) is provided with an inner pull screw (9) in the axial direction. The two ends of the inner pull screw (9) extend into the upper clamp (3) and the lower clamp (4) respectively for fixation.

4. A novel dry-type transformer for engine room control as described in claim 3, characterized in that, The internal pull screw (9) has multiple screws, which are respectively arranged on both sides of the three-phase coil (1) and in the interphase positions.

5. A novel dry-type transformer for engine room control as described in claim 3, characterized in that, The three-phase coil (1) is also provided with an external pull screw (10) along its axial direction. One end of the external pull screw (10) is fixedly connected to the upper clamp (3), and the other end is fixedly connected to the top plate of the outer shell (7).

6. A novel dry-type transformer for engine room control as described in claim 5, characterized in that, The end of the pull rod (10) extending out of the top plate of the outer casing (7) is connected to a lifting ring (11).

7. A novel dry-type transformer for engine room control as described in claim 1, characterized in that, At least one through-core screw (12) is horizontally arranged in the upper clamp (3) and the lower clamp (4), and the through-core screw (12) passes through the iron core (2) in the horizontal direction.

8. A novel dry-type transformer for engine room control as described in claim 7, characterized in that, At least one side screw (13) is horizontally arranged in the upper clamp (3) and the lower clamp (4), and the side screw (13) is symmetrically arranged on both sides of the iron core (2).

9. A novel dry-type transformer for engine room control as described in claim 1, characterized in that, After the three-phase coil (1) is wound, epoxy resin is used to seal the upper and lower ends of the coil, and then it is baked in a curing oven to make the three-phase coil (1) a closed rigid body.

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