Coil fixing structure of cabin dry-type transformer for wind power generation

Abstract

The utility model discloses a cabin dry-type transformer coil fixing structure for wind power generation, which comprises supports arranged on one side of a cabin, positioning rods which are limited by nuts are sleeved on the two supports which are symmetrical up and down, insulating cushion blocks are fixedly arranged on the positioning rods, and the insulating cushion blocks are fixed on the supports. And a high-voltage coil and a low-voltage coil which are distributed from outside to inside are arranged between the two insulating cushion blocks which are symmetrical up and down. Through the design of the notches and the convex blocks, the cabin can better resist the influence of low-frequency vibration, the overall vibration resistance is improved, the service life of equipment is prolonged, and the installation is simpler, more convenient and quicker through the design of the notches and the convex blocks; and the transverse displacement of the high-voltage coil and the low-voltage coil is effectively limited through the structures of the notches and the convex blocks, so that the cabin is more stable and reliable in the operation process, and the maintenance cost and the complexity of maintenance work are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a coil fixing structure of a dry-type transformer for a wind turbine nacelle. Background Art

[0002] A dry-type transformer refers to a transformer in which the iron core and windings are not immersed in insulating oil. In order to further reduce the consumption of large-current cables, in recent years, transformers for wind power generation have been installed in the high-altitude nacelles of wind turbines.

[0003] During the process of wind power generation, due to the influence of the rotation of the wind turbine blades and the operation of the generator, the dry-type transformer in the wind turbine nacelle is always in an environment of low-frequency vibration. The low-frequency vibration will affect the stability of the high-voltage coil and the low-voltage coil, not only affecting the service life of the equipment, but also the high-voltage coil and the low-voltage coil are not firmly connected to the insulating pads during installation, making the high-voltage coil and the low-voltage coil extremely prone to lateral displacement during operation. This requires maintenance of the wind turbine generator, thereby increasing the maintenance cost. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the high-voltage coil and the low-voltage coil are prone to displacement in the prior art, and a coil fixing structure of a dry-type transformer for a wind turbine nacelle is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A coil fixing structure of a dry-type transformer for a wind turbine nacelle includes brackets installed on one side of the nacelle, and positioning rods limited by nuts are sleeved on the two brackets symmetrically arranged up and down. Insulating pads are fixedly installed on the positioning rods. Between the two insulating pads symmetrically arranged up and down, there are two high-voltage coils and low-voltage coils distributed from outside to inside, and locking tools are arranged between the high-voltage coils, low-voltage coils and the insulating pads.

[0007] In order to better achieve the above purpose, the utility model adopts a further technical scheme: the length value of the high-voltage coil is 5 cm - 10 cm less than the length value of the low-voltage coil.

[0008] In order to better achieve the above purpose, the utility model adopts a further technical scheme: the locking tool includes a convex block fixedly installed on the upper insulating pad, and concave openings corresponding to the convex block are formed on the high-voltage coil and the low-voltage coil.

[0009] In order to better achieve the above purpose, the utility model adopts a further technical scheme: the concave opening is a right-angle groove structure, and the convex block is a right-angle block adapted to the concave opening. The concave opening is located at both ends of the high-voltage coil and the low-voltage coil.

[0010] The advantages of the present utility model are as follows: Through the design of the notch and the convex block, the cabin can better resist the influence of low-frequency vibration, improve the overall vibration resistance ability, and extend the service life of the equipment. By adopting the design of the notch and the convex block, the precise alignment of the high-voltage coil, the low-voltage coil and the insulating spacer can be realized, making the installation more convenient and rapid, and reducing the adjustment and difficulties in the installation process; Through the notch and convex block structure, the present utility model effectively restricts the lateral displacement of the high-voltage coil and the low-voltage coil, making the cabin more stable and reliable during operation, effectively reducing the displacement risk of the high-voltage coil and the low-voltage coil, reducing the maintenance frequency of the equipment, and reducing the maintenance cost and the complexity of the maintenance work. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the coil fixing structure of the dry-type transformer for the nacelle of wind power generation proposed by the present utility model;

[0012] Figure 2 It is a sectional view of the coil fixing structure of the dry-type transformer for the nacelle of wind power generation proposed by the present utility model;

[0013] Figure 3 It is an enlarged schematic view of Structure A of the coil fixing structure of the dry-type transformer for the nacelle of wind power generation proposed by the present utility model.

[0014] In the figure: 1, high-voltage coil; 2, low-voltage coil; 3, insulating spacer; 4, notch; 5, convex block; 6, bracket; 7, positioning rod. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0016] Refer to Figures 1-3As shown in the figure, the dry-type transformer coil fixing structure for a wind turbine nacelle includes a bracket 6 installed on one side of the nacelle. Positioning rods 7 limited by nuts are sleeved on the two brackets 6 that are symmetrically arranged up and down. An insulating cushion block 3 is fixedly installed on the positioning rod 7. The bracket 6 guides the positioning rod 7, enabling the positioning rod 7 to smoothly pull the insulating cushion block 3 during movement. The position of the positioning rod 7 can be locked by nuts. Between the two insulating cushion blocks 3 that are symmetrically arranged up and down, there are two high-voltage coils 1 and low-voltage coils 2 distributed from outside to inside. The length value of the high-voltage coil 1 is 5 cm - 10 cm less than the length value of the low-voltage coil 2. Locking tools are provided between the high-voltage coil 1, the low-voltage coil 2 and the insulating cushion block 3. The locking tool includes a convex block 5 fixedly installed on the upper insulating cushion block 3. Notches 4 corresponding to the convex block 5 are opened on the high-voltage coil 1 and the low-voltage coil 2. By setting the convex block 5 on the insulating cushion block 3 and opening the notches 4 corresponding to the convex block 5 on the high-voltage coil 1 and the low-voltage coil 2, accurate alignment of the high-voltage coil 1, the low-voltage coil 2 and the insulating cushion block 3 can be achieved, making the installation more simple and fast, and reducing the adjustment and difficulties during the installation process. The notch 4 is a right-angle groove structure, and the convex block 5 is a right-angle block adapted to the notch 4. The notch 4 is located at both ends of the high-voltage coil 1 and the low-voltage coil 2. By making the notch 4 a right-angle groove structure, after the convex block 5 corresponds to the notch 4, the nacelle is more stable and reliable during operation, reducing the probability of faults.

[0017] The design of the notch 4 and the convex block 5 enables the nacelle to better resist the influence of low-frequency vibration, improves the overall anti-vibration ability, extends the service life of the equipment, and can reduce the frequency of equipment maintenance by reducing the displacement risk of the coils.

[0018] When assembling the high-voltage coil 1 and the low-voltage coil 2 of the present utility model, pressure is applied to the two positioning rods 7, so that the positioning rods 7 drive the insulating cushion block 3 to gradually approach the high-voltage coil 1 and the low-voltage coil 2 when sliding on the bracket 6. When the insulating cushion block 3 moves, it can drive the convex block 5 to extend into the notch 4 in the high-voltage coil 1 and the low-voltage coil 2, and the positions of the high-voltage coil 1 and the low-voltage coil 2 are limited through the mutual cooperation of the notch 4 and the convex block 5. The position of the positioning rod 7 is locked using nuts. After the nacelle is powered on, it can operate. The mutual cooperation of the notch 4 and the convex block 5 can reduce the lateral displacement of the high-voltage coil 1 and the low-voltage coil 2.

Claims

1. A wind power generation nacelle dry-type transformer coil fixing structure, comprising a bracket (6) mounted on one side of the nacelle, and two brackets (6) symmetrically disposed up and down are each provided with a positioning rod (7) limited by a nut, characterized in that: An insulating pad (3) is fixedly mounted on the positioning rod (7), and two high-voltage coils (1) and low-voltage coils (2) distributed from outside to inside are arranged between two insulating pads (3) symmetrically arranged in an upper and lower direction, and locking fixtures are arranged between the high-voltage coil (1), the low-voltage coil (2) and the insulating pads (3).

2. The wind power generation nacelle dry-type transformer coil fixing structure according to claim 1, characterized in that: The length of the high-voltage coil (1) is 5 cm to 10 cm less than the length of the low-voltage coil (2).

3. The wind power generation nacelle dry-type transformer coil fixing structure according to claim 1, characterized in that: The locking tool comprises a protrusion (5) fixedly mounted on the upper insulating pad (3), and a recess (4) corresponding to the protrusion (5) is provided on the high-voltage coil (1) and the low-voltage coil (2).

4. The wind power generation nacelle dry-type transformer coil fixing structure according to claim 3 is characterized in that: The notch (4) is a right-angle groove structure, and the protrusion (5) is a right-angle block matched with the notch (4); the notch (4) is located at both ends of the high-voltage coil (1) and the low-voltage coil (2).

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