Micro gas turbine rare earth permanent magnet generator set

Abstract

The invention relates to a micro gas turbine rare earth permanent magnet generator set which comprises a micro gas turbine and a rare earth permanent magnet generator, the micro gas turbine comprises a gas compressor, a turbine and a fan, and the gas compressor, the turbine and the fan are driven by a rotating shaft to coaxially rotate; the rare earth permanent magnet generator comprises a stator and a rotor. The left end of the rotor and the rotating shaft coaxially rotate through a coupler. A heat dissipation pipe set is arranged in the rare earth permanent magnet generator, and an air inlet main pipe and an air outlet main pipe of the heat dissipation pipe set are arranged at the axial end, close to the draught fan, of the rare earth permanent magnet generator. The pipe diameter of the radiating pipe group is gradually reduced from the air inlet main pipe to the air outlet main pipe; the fan is connected with the air inlet main pipe to provide air for the air inlet main pipe, and the air outlet main pipe is connected with the air compressor to convey air heated and pressurized by the rare earth permanent magnet generator to the air compressor. The rare earth permanent magnet generator is higher in power generation efficiency, reduces energy consumption, is energy-saving and environment-friendly, and prolongs the service life of the rare earth permanent magnet material.

Description

Technical Field

[0001] The invention belongs to the technical field of power generation equipment, and in particular relates to a micro gas turbine rare earth permanent magnet generator set. Background Art

[0002] A micro gas turbine is a small power device that can be used to generate electricity when combined with a rare earth permanent magnet generator set. The micro gas turbine is mainly composed of three core components: a compressor, a combustion chamber, and a turbine. The compressor compresses air and transmits it to the combustion chamber. The fuel in the combustion chamber contacts and burns with the air. The high-temperature and high-pressure gas generated by the combustion drives the turbine to rotate. The turbine rotates coaxially with the compressor, and the turbine can also drive the compressor to operate. The micro gas turbine is combined with a rare earth permanent magnet generator. The rotation of the turbine can drive the rotor of the rare earth permanent magnet generator set to rotate, thereby generating electricity.

[0003] The compressor compresses the air to form high-temperature and high-pressure gas. The turbine is coaxial with the compressor. The turbine drives the compressor to rotate. The turbine will transfer part of the energy to the compressor. The energy output by the turbine to the rare earth permanent magnet generator will be reduced accordingly, and more fuel will be needed to provide energy.

[0004] Rare earth permanent magnet generators generate heat during operation, and rare earth permanent magnet materials are sensitive to temperature, so the heat dissipation of rare earth permanent magnet generators is particularly important. Currently, the commonly used heat dissipation method is to set up fans for heat dissipation, which can play a certain role in heat dissipation. However, when the rare earth permanent magnet generator set and the gas turbine are in a small space at the same time, the combustion of the gas turbine also generates heat, and the heat dissipation effect of using fans alone is limited. Summary of the invention

[0005] The purpose of the present invention is to provide four sets of rare earth permanent magnet generators for a micro gas turbine, which can simultaneously solve the technical problems of high energy consumption of the gas turbine and unsatisfactory heat dissipation of the rare earth permanent magnet generator set.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: A micro gas turbine rare earth permanent magnet generator set comprises a micro gas turbine and a rare earth permanent magnet generator. The micro gas turbine comprises a compressor, a turbine and a fan, and the compressor, the turbine and the fan are driven to rotate coaxially through a rotating shaft; the rare earth permanent magnet generator comprises a motor housing, a stator and a rotor, and the left end of the rotor rotates coaxially with the rotating shaft through a coupling; a heat dissipation pipe group is arranged in the rare earth permanent magnet generator, and the air inlet pipe and the air outlet pipe of the heat dissipation pipe group are both arranged at the axial end of the rare earth permanent magnet generator close to the fan, the heat dissipation pipe group enters from the axial left end of the rare earth permanent magnet generator, and exits from the axial left end of the rare earth permanent magnet generator after winding in the rare earth permanent magnet generator; the pipe diameter of the heat dissipation pipe group gradually decreases from the air inlet pipe to the air outlet pipe; the fan is connected to the air inlet pipe to provide air for the air inlet pipe, and the air outlet pipe is connected to the compressor so that the air heated and pressurized by the rare earth permanent magnet generator is delivered to the compressor.

[0007] Furthermore, the air intake main pipe is connected to a plurality of air intake branch pipes extending into the rare earth permanent magnet generator, and the air outlet main pipe is connected to a plurality of air outlet branch pipes extending into the rare earth permanent magnet generator. The number of the air intake branch pipes and the air outlet branch pipes is the same, and the air intake branch pipes are connected to the radially opposite air outlet branch pipes through connecting pipes to form a group of heat dissipation channels. The structural shape of each group of heat dissipation channels is the same, and the connecting pipe is located at the right end of the rare earth permanent magnet generator.

[0008] Furthermore, the multiple connecting pipes are connected through a ventilation seat, and a plurality of through holes are provided on the ventilation seat to form an avoidance space for air circulation. Each connecting pipe is divided into two sections, a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the air inlet branch pipe, and the second connecting pipe is connected to the air outlet branch pipe. The first connecting pipe and the second connecting pipe are respectively inserted on opposite sides of the ventilation seat and are connected through the avoidance space so that the multiple connecting pipes are located in the same plane.

[0009] Furthermore, the connecting pipe is a straight pipe with uniform diameter, and the diameter of the right end of the air inlet branch pipe and the diameter of the right end of the air outlet branch pipe are the same as the diameter of the connecting pipe, so as to make the temperature inside the rare earth permanent magnet generator uniform.

[0010] Furthermore, the air inlet main pipe and the air outlet main pipe are symmetrically distributed along the radial direction of the rare earth permanent magnet generator, and the multiple groups of heat dissipation channels are evenly distributed along the radial direction of the rare earth permanent magnet generator.

[0011] Furthermore, the diameter of the air inlet branch pipe gradually decreases from left to right, and the diameter of the air outlet branch pipe gradually increases from left to right.

[0012] Furthermore, the air intake branch pipe is connected to the air intake main pipe via an air intake connecting pipe, and the air outlet branch pipe is connected to the air outlet main pipe via an air outlet connecting pipe; the air intake connecting pipe is located on the left side of the air outlet connecting pipe.

[0013] Furthermore, the air intake main pipe is connected to an air intake branch pipe through an air intake connecting pipe coaxial with the air intake branch pipe, and the other air intake connecting pipes are arc-shaped flat pipes perpendicular to the air intake main pipe; the air outlet main pipe is connected to an air outlet branch pipe through an air outlet connecting pipe coaxial with the air outlet branch pipe, and the other air outlet connecting pipes are straight pipes perpendicular to the air outlet main pipe.

[0014] Furthermore, a liquid cooling jacket is arranged on the periphery of the rare earth permanent magnet generator, a liquid inlet pipe and a liquid outlet pipe are arranged on the liquid cooling jacket, and an air inlet of the fan is arranged on a side close to the rare earth permanent magnet generator.

[0015] Furthermore, an air deflector is provided on the rare earth permanent magnet generator.

[0016] Beneficial effects of the present invention: In the micro gas turbine rare earth permanent magnet generator set of the present invention, the diameter of the heat dissipation pipe group gradually decreases from the air inlet pipe 7 to the air outlet pipe 8, so that the incoming air is forced to be pressurized while the temperature is increased, and only a small amount of energy is required to compress it to the required pressure and temperature after reaching the compressor, thereby reducing the load of the compressor. Since the compressor rotates coaxially with the turbine and is driven by the turbine, the load of the compressor is reduced, and the load of the turbine can be reduced at the same time, and the rotation speed of the turbine can be increased. The rare earth permanent magnet generator has a higher power generation efficiency, reduces energy consumption, and is energy-saving and environmentally friendly.

[0017] The micro gas turbine rare earth permanent magnet generator set of the present invention has evenly distributed heat dissipation pipe groups, which can make the temperature inside the rare earth permanent magnet generator even, avoid local high temperature damage to the rare earth permanent magnet, and extend the service life of the rare earth permanent magnet material.

[0018] The micro gas turbine rare earth permanent magnet generator set of the present invention is provided with a liquid cooling jacket which can further reduce the temperature of the rare earth permanent magnet generator. At the same time, the gas entering the fan passes through the outside of the liquid cooling jacket from the right side and has been cooled before entering the rare earth permanent magnet generator, which has a better cooling effect on the rare earth permanent magnet generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the micro gas turbine rare earth permanent magnet generator set in Example 1; Figure 2 This is a schematic diagram of the structure of the heat dissipation pipe group in Example 1; Figure 3 This is a schematic diagram of the coordination structure of the stator, rotor and heat dissipation pipe group in Example 1; Figure 4 This is a schematic diagram of the structure of the vent seat in Example 1; Figure 5 This is a schematic diagram of the coordination structure of the liquid cooling jacket and the air guide cover in Example 1.

[0020] In the figure: 1. compressor; 2. turbine; 3. fan; 4. rare earth permanent magnet generator; 5. stator; 6. rotor; 7. air inlet main pipe; 8. air outlet main pipe; 9. air inlet branch pipe; 10. air outlet branch pipe; 11. connecting pipe; 12. ventilation seat; 13. avoidance space; 14. air inlet connecting pipe; 15. air outlet connecting pipe; 16. first connecting pipe; 17. second connecting pipe; 18. liquid cooling jacket; 19. air deflector. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments of the present invention and the accompanying drawings. Example

[0022] like Figure 1-4 As shown, the micro gas turbine rare earth permanent magnet generator set of this embodiment includes a micro gas turbine and a rare earth permanent magnet generator 4. The micro gas turbine includes a compressor 1, a turbine 2 and a fan 3. The compressor 1, the turbine 2 and the fan 3 are driven to rotate coaxially through a rotating shaft. The compressor 1, the turbine 2, the fan 3 and the rare earth permanent magnet generator 4 are connected in sequence from left to right. The turbine 2 is connected to a combustion chamber. The rare earth permanent magnet generator 4 includes a motor housing, a stator 5 and a rotor 6. The stator 5 and the rotor 6 are located in the motor housing. The stator 5 is fixed to the motor housing. The left end of the rotor 6 rotates coaxially with the rotating shaft through a coupling.

[0023] A heat dissipation pipe group is arranged in the rare earth permanent magnet generator 4, and the air inlet pipe 7 and the air outlet pipe 8 of the heat dissipation pipe group are both arranged at one end of the rare earth permanent magnet generator 4 close to the fan 3 in the axial direction. The heat dissipation pipe group enters from the axial left end of the rare earth permanent magnet generator 4, and exits from the axial left end of the rare earth permanent magnet generator 4 after winding in the rare earth permanent magnet generator 4; the pipe diameter of the heat dissipation pipe group gradually decreases from the air inlet pipe 7 to the air outlet pipe 8; the fan 3 is connected to the air inlet pipe 7 to provide air for the air inlet pipe 7, and the air outlet pipe 8 is connected to the compressor 1 so that the air heated and pressurized by the rare earth permanent magnet generator 4 is delivered to the compressor 1.

[0024] The air inlet main pipe 7 is connected to three air inlet branch pipes 9 extending into the rare earth permanent magnet generator 4, and the air outlet main pipe 8 is connected to three air outlet branch pipes 10 extending into the rare earth permanent magnet generator 4. The air inlet branch pipes 9 and the radially opposite air outlet branch pipes 10 are connected through a connecting pipe 11 to form a group of heat dissipation channels. The structure and shape of each group of heat dissipation channels are the same, and the connecting pipe 11 is located at the right end of the rare earth permanent magnet generator 4. The air inlet main pipe 7 and the air outlet main pipe 8 are symmetrically distributed along the radial direction of the rare earth permanent magnet generator 4, and the multiple groups of heat dissipation channels are evenly distributed along the radial direction of the rare earth permanent magnet generator 4 to ensure that the rare earth permanent magnet generator 4 dissipates heat evenly.

[0025] The connecting pipe 11 is connected through the vent seat 12, and three through holes are provided on the vent seat 12 to form an escape space 13 for air circulation. Each connecting pipe 11 is divided into two sections, namely, a first connecting pipe 16 and a second connecting pipe 17. The first connecting pipe 16 is connected to the air inlet branch pipe 9, and the second connecting pipe 17 is connected to the air outlet branch pipe 10. The first connecting pipe 16 and the second connecting pipe 17 are respectively inserted on opposite sides of the vent seat 12 and connected through the escape space 13, so that multiple connecting pipes 11 are located in the same plane. The connecting pipe 11 is a straight pipe with uniform diameter. The diameter of the right end of the air inlet branch pipe 9 and the diameter of the right end of the air outlet branch pipe 10 are the same as the diameter of the connecting pipe 11, so that the temperature in the rare earth permanent magnet generator 4 is uniform. The diameter of the air inlet branch pipe 9 gradually decreases from left to right, and the diameter of the air outlet branch pipe 10 gradually increases from left to right.

[0026] The air inlet branch pipe 9 is connected to the air inlet main pipe 7 through the air inlet connecting pipe 14, and the air outlet branch pipe 10 is connected to the air outlet main pipe 8 through the air outlet connecting pipe 15; the air inlet connecting pipe 14 is located on the left side of the air outlet connecting pipe 15. The air inlet main pipe 7 is connected to one air inlet branch pipe 9 through the air inlet connecting pipe 14 coaxial with the air inlet branch pipe 9, and the other air inlet connecting pipes 14 are arc-shaped flat pipes perpendicular to the air inlet main pipe 7; the air outlet main pipe 8 is connected to one air outlet branch pipe 10 through the air outlet connecting pipe 15 coaxial with the air outlet branch pipe 10, and the other air outlet connecting pipes 15 are straight pipes perpendicular to the air outlet main pipe 8.

[0027] A liquid cooling jacket 18 is provided on the periphery of the rare earth permanent magnet generator 4. A liquid inlet pipe and a liquid outlet pipe are provided on the liquid cooling jacket 18. The air inlet of the fan 3 is provided on a side close to the rare earth permanent magnet generator 4. An air deflector 19 is provided on the rare earth permanent magnet generator. Example

[0028] The micro gas turbine rare earth permanent magnet generator set described in this embodiment has a general structure consistent with that of Embodiment 1, but is different from Embodiment 1 in that: four air inlet branch pipes 9 are provided, and four corresponding air outlet branch pipes 10 are provided. Example

[0029] The micro gas turbine rare earth permanent magnet generator set described in this embodiment has a general structure consistent with that of Embodiment 1, but is different from Embodiment 1 in that a plurality of connecting pipes are arranged in a three-dimensional cross-arrangement.

[0030] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A micro gas turbine rare earth permanent magnet generator set, comprising a micro gas turbine and a rare earth permanent magnet generator (4), wherein the micro gas turbine comprises a compressor (1), a turbine (2) and a fan (3), wherein the compressor (1), the turbine (2) and the fan (3) are driven to rotate coaxially via a rotating shaft; the rare earth permanent magnet generator (4) comprises a motor housing, a stator (5) and a rotor (6), wherein the left end of the rotor (6) rotates coaxially with the rotating shaft via a coupling; the characteristics are as follows: A heat dissipation pipe group is arranged in the rare earth permanent magnet generator (4). The air inlet pipe (7) and the air outlet pipe (8) of the heat dissipation pipe group are both arranged at one end of the rare earth permanent magnet generator (4) in the axial direction close to the fan (3). The heat dissipation pipe group enters from the axial left end of the rare earth permanent magnet generator (4), goes around in the rare earth permanent magnet generator (4), and then exits from the axial left end of the rare earth permanent magnet generator (4). The pipe diameter of the heat dissipation pipe group gradually decreases from the air inlet pipe (7) to the air outlet pipe (8). The fan (3) is connected to the air inlet pipe (7) to provide air to the air inlet pipe (7), and the air outlet pipe (8) is connected to the compressor (1) so that the air heated and pressurized by the rare earth permanent magnet generator (4) is delivered to the compressor (1).

2. The micro gas turbine rare earth permanent magnet generator set according to claim 1, characterized in that: The air intake main pipe (7) is connected to a plurality of air intake branch pipes (9) extending into the rare earth permanent magnet generator (4), and the air outlet main pipe (8) is connected to a plurality of air outlet branch pipes (10) extending into the rare earth permanent magnet generator (4). The number of the air intake branch pipes (9) and the number of the air outlet branch pipes (10) are the same. The air intake branch pipes (9) and the radially opposite air outlet branch pipes (10) are connected via a connecting pipe (11) to form a group of heat dissipation channels. The structural shape of each group of heat dissipation channels is the same. The connecting pipe (11) is located at the right end of the rare earth permanent magnet generator (4).

3. The micro gas turbine rare earth permanent magnet generator set according to claim 1 or 2, characterized in that: The plurality of connecting pipes (11) are connected via a vent seat (12). The vent seat (12) is provided with a plurality of through holes to form an escape space (13) for air circulation. Each connecting pipe (11) is divided into two sections, namely a first connecting pipe (16) and a second connecting pipe (17). The first connecting pipe (16) is connected to an air inlet branch pipe (9), and the second connecting pipe (17) is connected to an air outlet branch pipe (10). The first connecting pipe (16) and the second connecting pipe (17) are respectively inserted into opposite sides of the vent seat (12) and are connected via the escape space (13), so that the plurality of connecting pipes (11) are located in the same plane.

4. The micro gas turbine rare earth permanent magnet generator set according to claim 3, characterized in that: The connecting pipe (11) is a straight pipe with a uniform diameter. The diameter of the right end of the air inlet branch pipe (9) and the diameter of the right end of the air outlet branch pipe (10) are the same as the diameter of the connecting pipe (11), so that the temperature inside the rare earth permanent magnet generator (4) is uniform.

5. The micro gas turbine rare earth permanent magnet generator set according to claim 2, characterized in that: The air inlet main pipe (7) and the air outlet main pipe (8) are symmetrically distributed along the radial direction of the rare earth permanent magnet generator (4), and the plurality of heat dissipation channels are evenly distributed along the radial direction of the rare earth permanent magnet generator (4).

6. The micro gas turbine rare earth permanent magnet generator set according to claim 2, characterized in that: The diameter of the air inlet branch pipe (9) gradually decreases from left to right, and the diameter of the air outlet branch pipe (10) gradually increases from left to right.

7. The micro gas turbine rare earth permanent magnet generator set according to claim 1, characterized in that: The air intake branch pipe (9) is connected to the air intake main pipe (7) via an air intake connecting pipe (14), and the air outlet branch pipe (10) is connected to the air outlet main pipe (8) via an air outlet connecting pipe (15); the air intake connecting pipe (14) is located on the left side of the air outlet connecting pipe (15).

8. The micro gas turbine rare earth permanent magnet generator set according to claim 7, characterized in that: The air intake main pipe (7) is connected to an air intake branch pipe (9) via an air intake connecting pipe (14) coaxial with the air intake branch pipe (9), and the other air intake connecting pipes (14) are arc-shaped flat pipes perpendicular to the air intake main pipe (7); the air outlet main pipe (8) is connected to an air outlet branch pipe (10) via an air outlet connecting pipe (15) coaxial with the air outlet branch pipe (10), and the other air outlet connecting pipes (15) are straight pipes perpendicular to the air outlet main pipe (8).

9. The micro gas turbine rare earth permanent magnet generator set according to claim 1, characterized in that: A liquid cooling jacket (18) is arranged on the periphery of the rare earth permanent magnet generator (4), a liquid inlet pipe and a liquid outlet pipe are arranged on the liquid cooling jacket (18), and an air inlet of the fan (3) is arranged on a side close to the rare earth permanent magnet generator (4).

10. The micro gas turbine rare earth permanent magnet generator set according to claim 9, characterized in that: An air deflector (19) is provided on the rare earth permanent magnet generator.

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