Generator pole coil ventilation assembly

Abstract

The utility model relates to the technical field of hydro-generators, and discloses a generator pole coil ventilation assembly which comprises a pole coil and a magnet yoke, the pole coil is connected to the magnet yoke through a connecting piece, and the generator pole coil ventilation assembly is characterized in that the position between the pole coil and the magnet yoke is lifted through a lower support; a ventilation heat dissipation channel is formed between the pole coil and the magnet yoke. The temperature of the pole coil is reduced, and the problem of overhigh temperature of the generator is solved.

Description

Technical Field

[0001] This utility model relates to the field of hydro-generator technology, specifically to a generator magnetic pole coil ventilation assembly. Background Technology

[0002] The magnetic pole coil of a hydro-generator is the main heat-generating component of the generator, and it is the key component for generating the magnetic field. When direct current passes through the magnetic pole coil, it generates a magnetic field, which forms a magnetic circuit with the stator core. When the rotor rotates, it cuts through this magnetic field, thereby inducing an electromotive force and current in the stator windings, realizing the process of converting mechanical energy into electrical energy.

[0003] Chinese patent document CN111654163B discloses a high-efficiency heat dissipation system for the magnetic pole coil of a hydro generator, including a stator, a rotor, and a cooling system. The rotor includes a shaft, a yoke, a bracket connecting the shaft and the yoke, several iron cores, and several layers of copper busbars on the iron cores. Several radial ventilation holes are provided on the yoke, iron cores, and stator. The two ends of the rotor are air inlets, and the middle of the outer side of the stator is an air outlet. The cooling system is connected to the air inlets and outlets through pipes. A ventilation ring is provided between two adjacent layers of copper busbars. The ventilation ring has axial ventilation holes extending along the rotor axis and penetrating the two air inlets. Several radial heat dissipation holes penetrating the axial ventilation holes are provided on the outer side of the ventilation ring. The area of ​​the radial heat dissipation holes gradually increases from the two ends of the rotor to the middle of the rotor.

[0004] The existing technology has the following shortcomings: In the axial flow turbine unit, because the unit size is smaller than other types of hydro turbine generator units, the spacing between the magnetic pole coils is smaller, the axial ventilation area is smaller, and the magnetic pole coils cannot be adequately cooled, which often leads to high magnetic pole coil temperatures, causing the generator unit to malfunction, and some units even have to reduce the generator power. Utility Model Content

[0005] To address the technical problem of excessively high temperature in magnetic pole coils, this utility model provides a generator magnetic pole coil ventilation assembly, comprising a magnetic pole coil and a magnetic yoke. The magnetic pole coil is connected to the magnetic yoke via a connector. The key feature is that the magnetic pole coil and the magnetic yoke are raised by a lower support, forming a ventilation and heat dissipation channel between them.

[0006] Preferably, the lower support is provided at the middle position of both ends of the magnetic pole coil, and the ventilation and heat dissipation channels are formed on both sides of the bottom of the magnetic pole coil.

[0007] To facilitate support of the magnetic pole coil, the lower support has a Z-shaped structure, and the two ends of the magnetic yoke are provided with Z-shaped platforms for the lower support to connect to.

[0008] To facilitate height adjustment, an adjustment shim is provided between the lower support and the magnetic yoke.

[0009] To facilitate insulation of the magnetic pole coil, an insulating upper support plate is provided on the top of the magnetic pole coil, and a pole shoe is provided above the insulating upper support plate.

[0010] This utility model has the following beneficial effects:

[0011] 1. The lower support of the magnetic pole coil adopts two insulated lower supports at both ends of the coil axis, and the rest of the lower part of the magnetic pole coil is completely suspended. While ensuring the insulation of the magnetic pole coil to the ground, two ventilation and heat dissipation channels are added, the cooling ventilation channels of the generator rotating parts are enlarged, and the heat dissipation area of ​​the magnetic pole coil is increased, thereby effectively reducing the temperature of the magnetic pole coil and solving the problem of excessive temperature of the current axial flow generator.

[0012] 2. This utility model has a simple structure, low installation and manufacturing costs, and is easy to process, manufacture, adjust and install. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment of the generator magnetic pole coil ventilation assembly of this utility model;

[0014] Figure 2 for Figure 1 Side view. Detailed Implementation

[0015] The following detailed description illustrates the specific implementation method:

[0016] Those skilled in the art will understand that: the magnetic yoke of a hydro-generator is a rotor structure made of stacked silicon steel sheets, located in the central part of the rotor, and together with the magnetic poles, forms the magnetic circuit of the generator.

[0017] Pole shoes: Pole shoes are the end parts of the generator rotor pole coils. They are connected to the pole coils and together form the generator's magnetic circuit. The shape and size of the pole shoes are usually customized according to the generator's design requirements to ensure that the magnetic field is evenly and stably distributed inside the generator.

[0018] The reference numerals in the accompanying drawings include: 1. Magnetic pole coil; 2. Magnetic yoke; 3. Bolt; 4. Lower support; 5. Ventilation and heat dissipation channel; 6. Z-shaped platform; 7. Adjustment shim; 8. Insulating upper support plate; 9. Pole shoe.

[0019] Example 1

[0020] like Figure 1 and 2As shown, a generator magnetic pole coil ventilation assembly includes a magnetic pole coil 1 and a magnetic yoke 2. The magnetic pole coil 1 is connected to the magnetic yoke 2 by bolts 3. The magnetic pole coil 1 and the magnetic yoke 2 are raised by a lower support 4, and a ventilation and heat dissipation channel 5 is formed between the magnetic pole coil 1 and the magnetic yoke 2. The lower support 4 is made of insulating material.

[0021] The lower support 4 is provided at the middle position of both ends of the magnetic pole coil 1, and the ventilation and heat dissipation channels 5 are formed on both sides of the bottom of the magnetic pole coil 1.

[0022] The lower support 4 has a Z-shaped structure. The two ends of the magnetic yoke 2 are provided with Z-shaped platforms 6 for the lower support 4 to connect to. The lower support 4 is fixed to the Z-shaped platforms 6 by bolts 3.

[0023] An adjusting shim 7 is provided between the lower support 4 and the magnetic yoke 2.

[0024] The magnetic pole coil 1 is connected and fixed by a row of bolts 3. Of course, the bolts 3 can also be replaced with T-shaped tenons.

[0025] The top of the magnetic pole coil 1 is provided with an insulating upper support plate 8, and a pole shoe 9 is provided above the insulating upper support plate 8.

[0026] The top of the magnetic pole coil 1 is heat-pressed into a single unit with the insulating upper support plate 8. The bottom of the magnetic pole coil 1 is supported by two lower supports 4, which suspends the remaining part between the magnetic pole coil 1 and the magnetic yoke 2. While ensuring that the magnetic pole coil 1 is insulated from the ground, multiple ventilation and heat dissipation channels 5 are added, the cooling and ventilation channels of the generator rotating part are enlarged, and the heat dissipation area of ​​the magnetic pole coil 1 is increased, thereby effectively reducing the temperature of the magnetic pole coil 1 and solving the problem of excessive temperature of the current axial flow generator.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A generator magnetic pole coil ventilation assembly, comprising a magnetic pole coil and a magnetic yoke, wherein the magnetic pole coil is connected to the magnetic yoke via a connector, characterized in that, The magnetic pole coil and the magnetic yoke are raised by a lower support, and a ventilation and heat dissipation channel is formed between the magnetic pole coil and the magnetic yoke.

2. The generator magnetic pole coil ventilation assembly according to claim 1, characterized in that: The lower support is provided at the middle position of both ends of the magnetic pole coil, and the ventilation and heat dissipation channels are formed on both sides of the bottom of the magnetic pole coil.

3. The generator magnetic pole coil ventilation assembly according to claim 2, characterized in that: The lower support has a Z-shaped structure, and the two ends of the magnetic yoke are provided with Z-shaped platforms for the lower support to connect.

4. The generator magnetic pole coil ventilation assembly according to claim 3, characterized in that: An adjustment shim is provided between the lower support and the magnetic yoke.

5. The generator magnetic pole coil ventilation assembly according to claim 4, characterized in that: The magnetic pole coil is provided with an insulating upper support plate at the top, and a pole shoe is provided above the insulating upper support plate.

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