Permanent magnet generator

Abstract

The utility model discloses a permanent magnet generator, which relates to the technical field of generators and comprises a casing, a fan cover is fixedly mounted at the tail end of the casing, a fan is arranged in the fan cover, a plurality of air outlet nets are fixedly mounted at the connecting part of the front end of the fan cover and the casing, and the permanent magnet generator further comprises a cooling pipe arranged on the inner wall of the casing. According to the utility model, through the combination of air-cooling heat dissipation and water-cooling heat dissipation, the heat dissipation efficiency is improved, the stable operation of the generator in a high-temperature environment is ensured, the heat dissipation structure adopts the design of the fan cover, the fan and the air outlet net, the air duct structure is simplified, the manufacturing and mounting difficulty is reduced, and the cooling pipe is arranged on the inner wall of the casing, so that the heat dissipation efficiency is improved. The water inlet port and the water outlet port are located at the two ends of the outer portion of the machine shell respectively, circulation and replacement of cooling water are facilitated, the stator iron core is arranged in the rotor, the rotor is wrapped outside the stator iron core, and the structure facilitates reduction of the size of the motor and improvement of the efficiency of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of generators, in particular to a permanent magnet generator. Background Art

[0002] A permanent magnet generator is a power generation device that uses permanent magnets to generate an excitation magnetic field instead of using an excitation current to generate a magnetic field. The permanent magnet generator is mainly composed of a stator, a rotor, a speed sensor, a housing, a cooling system and other components. Like an AC generator, it uses the electromagnetic induction principle of a wire cutting a magnetic field to induce an electric potential, and converts the mechanical energy of the prime mover into electrical energy output.

[0003] The heat dissipation methods of permanent magnet generators mainly include air cooling, water cooling, liquid metal cooling, phase change material cooling, thermocouple cooling, radiation cooling and other methods.

[0004] The existing permanent magnet generator air cooling structure has high requirements for air duct design, which needs to ensure smooth air flow inside the generator to avoid air short circuit or dead corner. The complexity of air duct design increases the difficulty of manufacturing and installation.

[0005] Therefore, it is necessary to invent a permanent magnet generator to solve the above problems. Summary of the invention

[0006] The purpose of the utility model is to provide a permanent magnet generator to solve the above-mentioned shortcomings in the technology.

[0007] In order to achieve the above object, the utility model provides the following technical solution: a permanent magnet generator, comprising a casing, a wind shield fixedly installed at the rear end of the casing, a fan arranged inside the wind shield, a plurality of air outlet nets fixedly installed at the connection part between the front end of the wind shield and the casing, and further comprising:

[0008] A cooling pipe is arranged on the inner wall of the casing, and a water inlet port and a water outlet port of the cooling pipe are respectively located at two ends of the outside of the casing;

[0009] Two bases are fixedly installed on both sides of the exterior of the casing, the interior of the base is a hollow structure, heat dissipation ports are provided at both ends of the base, a through groove is provided at the connection between the casing and the base, and the through groove is connected to the heat dissipation port at one end of the base.

[0010] As a preferred solution of the utility model, a plurality of heat dissipation fins are fixedly mounted on the outside of the housing, and both ends of the plurality of heat dissipation fins are provided with notches matched with the ports of the cooling pipes.

[0011] As a preferred solution of the utility model, a rotor is arranged inside the casing, a stator core is arranged inside the casing, the stator core is wrapped around the outside of the rotor, and the cooling pipe is wound around the outside of the stator core.

[0012] As a preferred solution of the utility model, a bearing is fixedly installed in the front middle part of the casing, the front end shaft of the rotor is connected to the inner ring of the bearing, and the rear end shaft of the rotor is connected to the middle part of the fan.

[0013] As a preferred solution of the utility model, an air outlet is opened at the center of the rear end of the wind hood, and the air outlet is fan-shaped, and the front end of the wind hood is fixedly connected to the rear end connecting piece of the casing by bolts.

[0014] As a preferred solution of the utility model, both ends of the same side of the casing are provided with pipe openings, and the water inlet port and the water outlet port of the cooling pipe are respectively located in the pipe openings at both ends of the casing.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] The heat dissipation efficiency is improved by combining air cooling and water cooling, ensuring the stable operation of the generator in a high temperature environment. The heat dissipation structure adopts a wind cover, a fan and an air outlet net design, which simplifies the air duct structure and reduces the difficulty of manufacturing and installation. The cooling pipe is arranged on the inner wall of the casing, and the water inlet port and the water outlet port are respectively located at the two ends of the outer casing, which is convenient for the circulation and replacement of cooling water. The stator core is arranged inside the rotor, and the rotor is wrapped outside the stator core. This structure is conducive to reducing the size of the motor and improving the efficiency of the motor.

[0017] The overall structural design of the permanent magnet generator is reasonable, which reduces the size of the generator and saves space. It is suitable for various occasions. It adopts a combination of multiple heat dissipation methods to ensure the stable operation of the generator under high temperature and high load conditions and improve the reliability of the motor. The cooling pipe and other components are designed to be easy to disassemble and replace, which is convenient for daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0020] Figure 2 It is an exploded view of the overall structure of the utility model;

[0021] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0022] Figure 4 It is a cross-sectional view of the casing of the utility model;

[0023] Figure 5 For this utility model Figure 2 Magnified view of area A.

[0024] Description of reference numerals:

[0025] 1. Casing; 2. Air hood; 3. Fan; 4. Air outlet net; 5. Stator core; 6. Rotor; 7. Cooling pipe; 8. Cooling fins; 9. Bearing; 10. Machine base; 11. Heat dissipation port; 12. Pipe port. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-5 A permanent magnet generator shown includes a casing 1, a fan 2 is fixedly installed at the rear end of the casing 1, a fan 3 is arranged inside the fan 2, and a plurality of air outlet nets 4 are fixedly installed at the connection between the front end of the fan 2 and the casing 1. This design is conducive to the smooth flow of air inside the generator, avoiding air short circuit or dead corner, and improving the heat dissipation effect, and also includes:

[0028] The cooling pipe 7 is arranged on the inner wall of the casing 1. The water inlet port and the water outlet port of the cooling pipe 7 are respectively located at two ends of the outside of the casing 1. This structural design is conducive to the circulation of the coolant inside the casing 1, effectively taking away the heat generated by the generator, and improving the heat dissipation effect;

[0029] Two machine bases 10 are fixedly installed on both sides of the outside of the casing 1. The interior of the machine base 10 is a hollow structure. Heat dissipation ports 11 are provided at both ends of the machine base 10. A through groove is provided at the connection between the casing 1 and the machine base 10, and the through groove is connected to the heat dissipation port 11 at one end of the machine base 10. The structure of the machine base 10 is conducive to improving the stability of the generator, increasing the heat dissipation area, improving the heat dissipation effect, and can effectively dissipate the heat inside the casing 1.

[0030] Furthermore, in the above technical solution, a plurality of heat dissipation fins 8 are fixedly installed on the outside of the casing 1 to increase the heat dissipation area outside the casing 1 and improve the heat dissipation effect. Both ends of the plurality of heat dissipation fins 8 are provided with recesses that are compatible with the ports of the cooling pipe 7.

[0031] Furthermore, in the above technical solution, a rotor 6 is arranged inside the casing 1, a stator core 5 is arranged inside the casing 1, the stator core 5 is wrapped around the outside of the rotor 6, and a cooling pipe 7 is wound around the outside of the stator core 5. This structural design is beneficial to the heat transfer between the stator core 5 and the rotor 6 during the power generation process, thereby improving the heat dissipation effect.

[0032] Furthermore, in the above technical solution, a bearing 9 is fixedly installed at the front middle part of the casing 1, the front end shaft of the rotor 6 is connected to the inner ring of the bearing 9, and the rear end shaft of the rotor 6 is connected to the middle part of the fan 3.

[0033] Furthermore, in the above technical solution, an air outlet is provided at the center of the rear end of the air hood 2, and the air outlet is fan-shaped, and the front end of the air hood 2 is fixedly connected to the rear end connector of the casing 1 by bolts.

[0034] Furthermore, in the above technical solution, pipe openings 12 are provided at both ends of the same side of the casing 1, and the water inlet port and the water outlet port of the cooling pipe 7 are respectively located in the pipe openings 12 at both ends of the casing 1, and the pipe openings 12 facilitate the installation of the water inlet port and the water outlet port of the cooling pipe 7.

[0035] The working process of a permanent magnet generator provided by the utility model when in use is as follows:

[0036] When installing the permanent magnet generator, first assemble the casing 1, the fan cover 2, the rotor 6, the stator core 5 and other components together. Ensure that the connection between the casing 1 and the fan cover 2 is firm, and the fan 3 inside the fan cover 2 is aligned with the axis of the rotor 6. Before installing the stator core 5 and the rotor 6, first install the cooling pipe 7 on the inner wall of the casing 1, and the water inlet and outlet ports at both ends of the cooling pipe 7 are located at the two ends of the outside of the casing 1. Finally, weld the base 10 to both sides of the outside of the casing 1. After ensuring that all components are installed and wired correctly, the permanent magnet generator can be started. When starting, please pay attention to whether the fan 3 is running normally, whether the water flow in the cooling pipe 7 is smooth, and whether the generator is running smoothly. After the permanent magnet generator is started, it can operate normally. During the operation, pay close attention to the temperature, current, voltage and other parameters of the generator to ensure that they are within the normal range. If any abnormality is found, stop the machine immediately for inspection;

[0037] When the permanent magnet generator is working, the fan 3 in the wind cover 2 draws in external air and cools the inside of the generator through the air duct. The cooling air flows through the stator core 5 and the rotor 6 to take away the heat. At the same time, the water flow circulates in the cooling pipe 7, and transfers the heat inside the generator to the outside through heat exchange to achieve heat dissipation. The hollow structure inside the base 10 is conducive to air flow and improves the heat dissipation effect. The heat dissipation port 11 in the base 10 allows the air to flow inside the base 10 and take away the heat inside the generator. In addition, the heat dissipation fins 8 and the air outlet net 4 at the front end of the wind cover 2 and the fan-shaped air outlet at the rear end also help to expand the heat dissipation area and improve the heat dissipation efficiency.

[0038] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A permanent magnet generator, comprising a housing (1), characterized in that: A wind shield (2) is fixedly mounted at the rear end of the casing (1), a fan (3) is arranged inside the wind shield (2), a plurality of air outlet nets (4) are fixedly mounted at the connection portion between the front end of the wind shield (2) and the casing (1), and further comprising: A cooling pipe (7) is arranged on the inner wall of the casing (1), and a water inlet port and a water outlet port of the cooling pipe (7) are respectively located at two ends of the outside of the casing (1); Two machine bases (10) are respectively fixedly mounted on two sides of the exterior of the housing (1); the interior of the machine base (10) is a hollow structure; heat dissipation openings (11) are provided at both ends of the machine base (10); a through groove is provided at the connection between the housing (1) and the machine base (10), and the through groove is connected to the heat dissipation opening (11) at one end of the machine base (10).

2. A permanent magnet generator according to claim 1, characterized in that: A plurality of heat dissipation fins (8) are fixedly mounted on the outside of the housing (1), and recesses matching the ports of the cooling pipes (7) are provided at both ends of the plurality of heat dissipation fins (8).

3. A permanent magnet generator according to claim 1, characterized in that: A rotor (6) is arranged inside the casing (1), a stator core (5) is arranged inside the casing (1), the stator core (5) is wrapped around the outside of the rotor (6), and the cooling pipe (7) is wound around the outside of the stator core (5).

4. A permanent magnet generator according to claim 3, characterized in that: A bearing (9) is fixedly mounted at the middle portion of the front end of the casing (1); the front end shaft of the rotor (6) is connected to the inner ring of the bearing (9); and the rear end shaft of the rotor (6) is connected to the middle portion of the fan (3).

5. A permanent magnet generator according to claim 1, characterized in that: An air outlet is provided at the centre of the rear end of the wind hood (2), and the air outlet is in a fan-shaped structure. The front end of the wind hood (2) is fixedly connected to the rear end connecting piece of the casing (1) by means of bolts.

6. A permanent magnet generator according to claim 1, characterized in that: Both ends of the same side of the casing (1) are provided with pipe openings (12), and the water inlet port and the water outlet port of the cooling pipe (7) are respectively located in the pipe openings (12) at both ends of the casing (1).

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