CN114498989B - Wind driven generator with cooling function - Google Patents
Wind driven generator with cooling function Download PDFInfo
- Publication number
- CN114498989B CN114498989B CN202111637726.2A CN202111637726A CN114498989B CN 114498989 B CN114498989 B CN 114498989B CN 202111637726 A CN202111637726 A CN 202111637726A CN 114498989 B CN114498989 B CN 114498989B
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- Prior art keywords
- cooling
- rear end
- cooling medium
- end cover
- module
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- 238000001816 cooling Methods 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002826 coolant Substances 0.000 claims description 51
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008111 motor development Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a wind driven generator with a cooling function, which comprises a rear end cover and a machine seat for fixing the rear end cover, wherein a cooling module for air cooling a rotor core is arranged on the rear end cover, the rotor core is arranged on a bearing seat, a stator core is arranged on the outer ring of the rotor core, and the stator core is cooled by water cooling through a stator water jacket arranged on the outer ring of the stator core. The wind driven generator solves the problems of large heat productivity, insufficient heat dissipation capacity and the like caused by high power density of a motor with a power level of 10MW-20MW by combining a stator water cooling mode and a rotor air cooling mode; the problems of large volume, limited space layout, large operation vibration noise and low heat exchange efficiency of a single rotor cooling system are solved.
Description
Technical Field
The invention belongs to the technical field of wind driven generators, and relates to a wind driven generator with a cooling function.
Background
The semi-direct-drive permanent magnet synchronous wind driven generator has the advantages of high power density and small volume, is widely applied to the field of wind power generation at present, and is particularly used for offshore wind power, and the semi-direct-drive motor is widely used with the characteristics of small volume, compact structure and high reliability. However, as the power of the motor is continuously increased, the heat productivity of the generator is also continuously increased, the temperature rise problem of the motor is more and more prominent, and the motor development is restrained, the design of the current semi-direct-drive motor cooling system only adopts one set of cooling system, one cooling loop, the heat dissipation capacity is improved to some extent, but the heat dissipation of the motor with higher power density is not satisfied, meanwhile, the power of the motor is increased, the volume of one set of cooling system is increased, the installation layout is difficult, and the vibration noise is large during operation. Therefore, there is a need to design new motor structures to meet the heat dissipation requirements of high power density generators.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a wind driven generator with an efficient cooling function, which solves the problems of continuous increase of single machine power, high power density, increased motor loss, insufficient heat dissipation capacity, increased volume of a set of cooling system, difficult installation and layout and large vibration noise during operation of a semi-direct-drive permanent magnet wind driven generator.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the wind driven generator with the cooling function is characterized by comprising a rear end cover and a machine seat for fixing the rear end cover, wherein a cooling module for air cooling a rotor core is arranged on the rear end cover, the rotor core is arranged on a bearing seat, a stator core is arranged on the outer ring of the rotor core, and the stator core is cooled by water through a stator water jacket arranged on the outer ring of the stator core.
Further, a plurality of groups of ventilation openings are formed in the circumferential surface of the rear end cover, each group of ventilation openings comprises a cooling medium outlet and a cooling medium inlet, an air duct is arranged on the cooling medium inlet and is connected with an air outlet of the cooling module, and the cooling medium outlet is connected with an air inlet of the cooling module.
Further, the ventilation openings are provided with four groups and are uniformly distributed on the circumferential surface of the rear end cover, and baffle plates are arranged between every two of the four groups of ventilation openings and used for dividing the inner cavity of the generator into four parts.
Further, a wind blocking barrel is arranged in the middle of the rear end cover, and the cooling medium is sealed inside the motor to form a sealed cavity.
Further, a cooling channel through which cooling liquid passes is arranged in the cooling module, gaps are formed between the cooling channels, when the cooling medium passes through the gaps, heat is taken away by low-temperature liquid in the cooling channel, and the heat is converted into a cold state from a hot state and is sent to a cooling medium outlet through a cooling fan.
Further, an air duct for circulating cooling medium is formed between the bottom of the stand and the lower surfaces of the stator core and the rotor core.
Further, the stator water jacket comprises a closed cavity formed by a first flange, an outer cylinder, an inner cylinder and a second flange, the cavity is divided into two mutually independent two parts by an isolating ring, cooling medium respectively enters the cavity from two inlets, and flows out from outlets after circulation.
Further, a plurality of baffle strips are arranged on the inner cylinder, cooling liquid flows in the cavity through the baffle strips to generate vortex, and the heat exchange efficiency of the cooling medium is increased and heat is taken away through the vortex and turbulence effect.
Compared with the prior art, the invention has the following beneficial effects:
the wind driven generator adopts a modularized cooling system scheme by combining a stator water cooling mode and a rotor air cooling mode, so that the problems of large heat productivity, insufficient heat dissipation capacity and the like caused by high power density of a 10MW-20MW power class motor are solved; the problems of large volume, limited space layout, large operation vibration noise and low heat exchange efficiency of a single rotor cooling system are solved.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate principles of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is an internal structural view of a wind turbine of the present invention;
FIG. 2 is an overall block diagram of a wind turbine according to the present invention;
FIG. 3 is a rear end cap block diagram of a wind turbine according to the present invention;
FIG. 4 is a rear end cap block diagram of a wind turbine according to the present invention;
FIG. 5 is a block diagram of a foundation of a wind turbine according to the present invention;
FIG. 6 is a block diagram of a stator water jacket of a wind turbine of the present invention;
FIG. 7 is a cross-sectional view of a stator water jacket of a wind turbine of the present invention;
FIG. 8 is a diagram illustrating the internal structure of a centrifugal fan of a wind turbine according to the present invention;
wherein: 1. a rear end cover; 2. a base; 3. a stator water jacket; 4. a stator core; 5. a rotor core; 6. a bearing seat; 7. a cooling module; 1.1, a cooling medium outlet; 1.2, a cooling medium inlet; 1.3, a baffle; 1.4, an air duct; 1.5, a wind shielding cylinder; 2.1, an air duct; 3.1, a stop bar; 3.2, isolating rings; 3.3, an inlet; 3.4, an outlet; 3.5, a first flange; 3.6, an outer cylinder; 3.7, an inner cylinder; 3.8, a second flange; 7.2, a cooling fan; 7.4, cooling channels; 7.5, clearance.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of devices that are consistent with aspects of the invention that are set forth in the following claims.
The present invention will be described in further detail below with reference to the drawings and examples for better understanding of the technical solutions of the present invention to those skilled in the art.
The utility model provides a aerogenerator with cooling function, includes rear end cover 1 and is used for fixing the frame 2 of rear end cover 1, be provided with on the rear end cover 1 and be used for carrying out the cooling module 7 of forced air cooling to rotor core 5, rotor core 5 sets up on bearing frame 6, rotor core 5 outer lane is provided with stator core 4, stator core 4 carries out water-cooling through the stator water jacket 3 that its outer lane set up. The periphery of the rear end cover 1 is provided with a plurality of groups of ventilation openings, each group of ventilation openings comprises a cooling medium outlet 1.1 and a cooling medium inlet 1.2, an air duct 1.4 is arranged on the cooling medium inlet 1.2, the air duct 1.4 is connected with an air outlet of the cooling module 7, and the cooling medium outlet 1.1 is connected with an air inlet of the cooling module 7.
Specifically, the ventilation openings are provided with four groups and are uniformly distributed on the circumferential surface of the rear end cover 1, and baffle plates 1.3 are arranged between every two of the four groups of ventilation openings and used for dividing the inner cavity of the generator into four parts.
The generator rotor part is cooled by a modularized cooling system, the circumference of the generator is uniformly and equally divided into four modules, each module is independently provided with a cooling device, and the cooling function of the module is independently realized. An inlet and an outlet of cooling medium are designed on the rear end cover, and a partition baffle plate is designed at the same time to effectively divide the internal cavity of the generator, and a wind blocking cylinder 1.5 is designed on the inner circle side of the rear end cover to ensure the tightness of the inner cavity of the whole generator and prevent the cooling medium from leaking.
Further, the middle part of the rear end cover 1 is provided with a wind shielding cylinder 1.5, and the wind shielding cylinder 1.5 ensures the tightness of the inner cavity of the whole generator and prevents cooling medium leakage.
Specifically, a cooling channel 7.4 through which cooling liquid passes is arranged in the cooling module 7, a gap 7.5 is formed between the cooling channels 7.4, when cooling medium passes through the gap 7.5, heat is taken away by low-temperature liquid in the cooling channel 7.4, the heat is converted into a cold state from a hot state, and the cold state is sent to a cooling medium inlet 1.2 through a cooling fan 7.2, so that cooling medium cold-heat exchange is completed, and power is provided for circulation of the whole rotor cooling system.
Further, an air duct 2.1 for cooling medium circulation is formed by the bottom of the base 2, the lower surfaces of the stator core 4 and the rotor core 5, so that the cooling medium of each module can effectively pass through, and independent circulation is realized. The machine base 2 plays a role in supporting the whole generator stator core 4, the rotor core 5 and the rear end cover 1, a plurality of circumferential ribs and axial ribs are arranged on the inner wall of the machine base 2, the strength of the whole motor is enhanced, a plurality of channels 2.1 are formed in the reinforcing ribs, a cooling medium circulation channel is formed, the cooling medium is led in from one end of the motor to the other end, and separation among different modules and medium conduction functions are achieved.
The design of rear end cover 1 uses subregion baffle 1.3, realizes the generator inner chamber and effectively divides, sets up coolant outlet, entry and realizes the business turn over function of coolant, and the structure of air duct 1.4 satisfies coolant and passes through according to the design route, and the sealing function of generator cavity is realized to the structure of wind shielding section of thick bamboo 1.5. The cooling medium enters the fan through the cooling medium inlet 1.2 and the air duct 1.4, passes through the air channel 2.1 in the generator, the air gap between the stator core 4 and the rotor core 5 and finally returns to the cooling fan through the cooling medium outlet to complete one-time circulation, meanwhile, the internal cavity of the generator is uniformly and equally divided into four modules through the partition light blocking 1.3, each module is independently designed with a cooling device, the cooling function is independently realized for the module, the inner circle side of the rear end cover is designed with the air duct 1.5, the tightness of the inner cavity of the whole generator is ensured, the cooling medium leakage is prevented, the corresponding cooling medium channel is designed on the engine base 2, and the independent cooling of a single module is realized by using the rotor cooling module.
Specifically, the outer ring of the rotor core 5 is provided with a stator core 4, the stator core 4 is cooled by water through a stator water jacket 3 arranged on the outer ring of the stator core 4, the stator water jacket 3 is formed into a closed cavity by a first flange 3.5, an outer cylinder 3.6, an inner cylinder 3.7 and a second flange 3.8, the cavity is divided into two mutually independent two parts by an isolating ring 3.2, cooling medium respectively enters the cavity from two inlets 3.3 and respectively flows out from outlets 3.4 after being circulated, a plurality of baffle strips 3.1 are arranged on the inner cylinder 3.7, and the cooling liquid flows in the cavity to generate vortex through the baffle strips 3.1, so that the heat exchange efficiency of the cooling medium is increased by utilizing the vortex and turbulence effect, and further more heat is taken away, and the heat exchange efficiency of the cooling system is improved.
The invention can realize that the single machine power of the current compact semi-direct-drive wind driven generator reaches the level of 10-20MW and the heat productivity is about 400kW, and by the wind driven generator with the cooling function, the high-efficiency heat exchange of the motor is realized by the stator water jacket structure with high heat exchange efficiency and the modularized rotor cooling structure with high heat exchange efficiency, the maximization of the capacity of the offshore wind driven generator set is promoted, the resource development utilization rate is improved, the user income is maximized, and the problems of large heat productivity, insufficient heat dissipation capacity and the like of the 10MW-20MW power class motor caused by high power density are solved; the problems of large volume, limited space layout, large operation vibration noise and low heat exchange efficiency of a single rotor cooling system are solved.
The invention is provided with a stator water jacket structure with high heat exchange efficiency, a modularized rotor cooling structure with high heat exchange efficiency and a rotor cooling loop with good sealing property; the stator water jacket cooling efficiency is high, and the rotor cooling adopts a brand new scheme of modularized design, so that the heat dissipation requirement of the whole machine for improving the power is met. The rear end cover is designed and used for dividing the inner cavity of the generator effectively, through holes are formed for realizing the in-out function of cooling medium, the air duct structure meets the requirement that the cooling medium passes through according to a designed path, and the wind shielding cylinder structure realizes the sealing function of the generator cavity. The inner cavity of the water channel in the stator water jacket is provided with the baffle strips, and the heat exchange efficiency of the cooling medium is increased by utilizing the vortex and turbulence effects, so that more heat is taken away, and the heat exchange efficiency of a cooling system is improved. The inner wall of the machine base is provided with a plurality of ribs in the circumferential direction and axial ribs, the strength of the whole motor is enhanced, a plurality of channels are formed in the reinforcing ribs, a cooling medium circulation channel is formed, the cooling medium is led in from one end of the motor to the other end, and separation among different modules and medium conduction functions are achieved.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (4)
1. The utility model provides a wind driven generator with cooling function, which is characterized in that, including rear end cover (1) and frame (2) that are used for fixing rear end cover (1), be provided with on rear end cover (1) and be used for carrying out the cooling module (7) of forced air cooling to rotor core (5), cooling module (7) quantity is four, cooling module (7) evenly divide into four modules with the generator circumference, and a cooling device is designed alone to every module, realizes cooling function alone to this module, rotor core (5) set up on bearing frame (6), rotor core (5) outer lane is provided with stator core (4), stator core (4) carries out the water-cooling through stator water jacket (3) that its outer lane set up, be provided with a plurality of sets of vents on the periphery of rear end cover (1), every set of vent includes a cooling medium export (1.1) and cooling medium entry (1.2), be provided with wind-guiding tube (1.4) on cooling medium entry (1.2), wind-guiding tube (1.4) and cooling module's outer lane are provided with cooling module (7), when cooling medium entry (7.7) are connected with cooling module (7), and cooling medium entry (7.7) are passed through in the cooling channel (7.7) and are passed through to cooling medium entry gap (7.7), the heat is taken away by low-temperature liquid in a cooling channel (7.4), the heat is converted into cold state from hot state, the cold state is sent to a cooling medium inlet (1.2) through a cooling fan (7.2), the stator water jacket (3) is formed into a closed cavity by a first flange (3.5), an outer cylinder (3.6), an inner cylinder (3.7) and a second flange (3.8), the cavity is divided into two mutually independent two parts by an isolating ring (3.2), and the cooling medium respectively enters the cavity from the two inlets (3.3) and flows out from an outlet (3.4) after circulation;
the four sets of ventilation openings are uniformly distributed on the circumferential surface of the rear end cover (1), and baffle plates (1.3) are arranged between every two of the four sets of ventilation openings and used for dividing the inner cavity of the generator into four parts.
2. A wind power generator with cooling function according to claim 1, characterized in that a wind blocking cylinder (1.5) is arranged in the middle of the rear end cover (1).
3. A wind power generator with cooling function according to claim 1, characterized in that the bottom of the stand (2) forms an air duct (2.1) for the circulation of cooling medium with the lower surfaces of the stator core (4) and the rotor core (5).
4. A wind driven generator with cooling function according to claim 1, characterized in that the inner cylinder (3.7) is provided with a plurality of baffle strips (3.1), the cooling liquid flows in the cavity through the baffle strips (3.1) to generate vortex, and the heat exchange efficiency of the cooling medium is increased and heat is taken away by the vortex and turbulence effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637726.2A CN114498989B (en) | 2021-12-29 | 2021-12-29 | Wind driven generator with cooling function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637726.2A CN114498989B (en) | 2021-12-29 | 2021-12-29 | Wind driven generator with cooling function |
Publications (2)
| Publication Number | Publication Date |
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| CN114498989A CN114498989A (en) | 2022-05-13 |
| CN114498989B true CN114498989B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111637726.2A Active CN114498989B (en) | 2021-12-29 | 2021-12-29 | Wind driven generator with cooling function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199490A (en) * | 2022-07-28 | 2022-10-18 | 西安中车永电捷力风能有限公司 | Cooling system of semi-direct-drive wind driven generator |
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| CN114498989A (en) | 2022-05-13 |
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