CN115199490A - Cooling system of semi-direct-drive wind driven generator - Google Patents
Cooling system of semi-direct-drive wind driven generator Download PDFInfo
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- CN115199490A CN115199490A CN202210901653.1A CN202210901653A CN115199490A CN 115199490 A CN115199490 A CN 115199490A CN 202210901653 A CN202210901653 A CN 202210901653A CN 115199490 A CN115199490 A CN 115199490A
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- cooling system
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- heat exchange
- air
- wind driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention belongs to the technical field of wind driven generators, and relates to a cooling system of a semi-direct drive wind driven generator, which is arranged at the top of a base of the semi-direct drive wind driven generator, so that the axial length of the generator is reduced, the axial space in a cabin is saved, and the compactness of the structure of a unit is favorably improved; through the oil gas filtering device, the cleanliness of internal circulation cooling air can be improved, so that the running reliability of the generator is improved; meanwhile, cold air generated by the centrifugal ventilator can directly act on the end part of the coil of the generator, namely a heat source, without other parts of the generator, so that an energy transfer path is reduced, the cooling efficiency is improved, and the power density of the semi-direct-drive generator is further improved.
Description
Technical Field
The invention belongs to the technical field of wind driven generators, relates to a cooling system, and particularly relates to a cooling system of a semi-direct-drive wind driven generator.
Background
As is known, when a wind driven generator operates, loss is generated, so that the motor generates heat, the temperature rises, the operation efficiency of the motor is influenced, and even the motor is burnt out in severe cases, so that the heating problem directly influences the service life of the motor and the operation reliability. With the development of science and technology, the single-machine capacity of wind driven generators is increasing, and the generated loss and heat are also increasing, so that the cooling system of the generator needs to be improved to improve the heat dissipation capacity and the motor efficiency, which is urgent.
At present, the products of the wind driven generator mainly comprise four types of double-fed type, squirrel cage type, direct drive type and semi-direct drive type, and the cooling modes mainly comprise natural air cooling, forced air cooling, air water cooling and water jacket cooling. In order to meet the cost reduction and efficiency improvement requirements of the wind power industry, the structure of the cooling system of the existing semi-direct-drive wind driven generator needs to be optimized, so that the reliability of the cooling system is improved, the size of the generator is reduced, the power density of the generator is improved, and the utilization rate of an engine room of a wind turbine generator is improved.
The existing cooling system of the semi-direct-driven generator is fixed on the rear end cover, the axial length of the generator is inevitably increased, cooling air generated by the fan impeller sequentially enters the components such as the rear end cover of the generator, the base and the like, passes through the flow guide devices such as the air guide cover and the like, and then acts on a heat source, so that the energy path is long, the energy loss of an internal circulation air path of the generator is large, and the efficiency of the fan is reduced. In addition, the conventional cooling system does not consider the influence of impurities such as oil gas in circulating cooling air in the generator on the generator.
Disclosure of Invention
The object of the present invention is to overcome the above mentioned drawbacks of the prior art and to provide a cooling system for a semi-direct drive wind generator.
In order to achieve the purpose, the invention provides the following technical scheme:
the cooling system of the semi-direct-drive wind driven generator comprises a box body arranged at the top of a generator base; the bottom of the box body is provided with a cooling system air inlet and a cooling system air outlet, and the cooling system air inlet and the cooling system air outlet are oppositely arranged; the oil-gas filtering device, the heat exchange device and the centrifugal ventilator are sequentially distributed in the box body, when the centrifugal ventilator works, hot air flows out from the air outlet of the engine base and enters the box body through the air inlet of the cooling system, cold air is obtained after sequentially passing through the oil-gas filtering device and the heat exchange device, and the cold air flows out from the air outlet of the cooling system and enters the generator through the air inlet of the engine base.
Further, the oil gas filtering device and the heat exchange device are fixed inside the box body through bolts respectively.
Furthermore, a plurality of groups of filter cotton or oil-gas separators are arranged in the oil-gas filtering device.
Furthermore, the angle of the volute air outlet in the centrifugal fan is matched with the angle of the base air inlet.
Furthermore, temperature sensors A are respectively installed at the air outlet of the engine base and the air inlet of the engine base.
Furthermore, the heat exchange device is provided with a cooling liquid water inlet and a cooling liquid water outlet, and the cooling liquid water outlet is connected with the stator water jacket water outlet through a water return pipe.
Further, the heat exchange device comprises a heat exchange core body, and the heat exchange core body is a plate-fin type air-water heat exchange core body made of aluminum alloy.
Furthermore, connecting flanges are respectively arranged at the coolant inlet and the coolant outlet, and the surface of each connecting flange is provided with a mounting interface for mounting the temperature sensor B.
Further, the bottom side of the heat exchange device is respectively provided with a leakage alarm and a leakage interface.
Furthermore, the number of the centrifugal ventilators is two, and each centrifugal ventilator comprises a motor, an impeller, a volute and a collector;
when the centrifugal fan works, cold air passing through the heat exchange device enters an impeller space along the axial direction, is accelerated under the driving of an impeller rotating at a high speed, is collected and guided by the volute and the current collector, is decelerated and changes the flow direction, enters the inside of the generator, takes away the heat of the generator through an air gap, and hot air enters the inside of a cooling system from the air outlet of the engine base and is obtained after passing through the oil-gas filtering device and the heat exchange device.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the cooling system is arranged on the top of the base of the semi-direct-drive wind driven generator, so that the axial length of the generator is reduced, the axial space in the engine room is saved, and the compactness of the unit structure is improved; the cooling system can improve the cleanliness of internal circulation cooling air through the oil-gas filtering device so as to improve the running reliability of the generator; meanwhile, cold air generated by the centrifugal ventilator can directly act on the end part of the coil of the generator, namely a heat source, without other parts of the generator, so that an energy transfer path is reduced, the cooling efficiency is improved, and the power density of the semi-direct-drive generator is further improved.
In addition, the wind temperature sensors (namely, temperature sensor A) used for monitoring the air inlet of the generator base and the air outlet of the generator base, the water temperature sensors (namely, temperature sensor B) used for monitoring the water inlet and the water outlet of the cooling liquid, the leakage alarm and other components are arranged in a matched manner, so that the running reliability of the semi-direct-drive wind driven generator can be improved; and moreover, the angle of the volute air outlet in the centrifugal ventilator is matched with the angle of the generator base air inlet, so that the cooling air path is optimized.
Therefore, compared with a traditional semi-direct-drive cooling system, the cooling system is simple in structure, the internal circulation cooling air path structure of the cooling system is adopted, cooling liquid can directly act on a heat source, the energy transfer path is small, the cooling efficiency is high, the production cost is low, and the cooling system has a good application prospect and market competitiveness.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is an overall structural view of a cooling system of a semi-direct drive wind driven generator according to the present invention;
FIG. 2 is an overall block diagram of the cooling system of the present invention mounted to a semi-direct drive wind turbine;
FIG. 3 is a front view of the cooling system of the present invention installed on a semi-direct drive wind turbine;
FIG. 4 is a diagram of an optimized centrifugal fan volute of the present invention;
FIG. 5 is a fluid trace diagram of a square rib plate air path;
FIG. 6 is a fluid trajectory diagram of an air path of a circular rib plate;
fig. 7 is a structure view of a split type box body.
Wherein: 1. a centrifugal fan; 2. a heat exchange device; 3. an oil gas filtering device; 4. a coolant inlet; 5. a coolant outlet; 6. a water return pipe; 7. an air outlet of the cooling system; 8. an air inlet of the cooling system; 9. a leak alarm; 10. a box body; 11. a generator base; 12. and (4) exhausting the valve.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of systems consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Examples
Referring to fig. 1-2, the present invention provides a cooling system for a semi-direct drive wind turbine, which includes a box 10 mounted on the top of a generator base 11; a cooling system air inlet 8 and a cooling system air outlet 7 are formed in the bottom of the box body 10, and the cooling system air inlet 8 and the cooling system air outlet 7 are arranged oppositely; the heat exchange device 2, the oil gas filtering device 3 and the centrifugal fan 1 are sequentially distributed in the box body 10, when the centrifugal fan 1 works, hot air flows out from the air outlet of the engine base and enters the box body 10 through the air inlet 8 of the cooling system, cold air is obtained after sequentially passing through the oil gas filtering device and the heat exchange device 2, and the cold air flows out from the air outlet 7 of the cooling system and enters the generator through the air inlet of the engine base.
Further, the oil gas filtering device 3 and the heat exchange device 2 are respectively fixed inside the box body 10 through bolts. The oil gas filtering device 3 is mainly used for adsorbing and filtering particle impurities carried by air after passing through the generator, and a plurality of groups of filter cotton or oil-gas separators can be arranged in the oil gas filtering device, so that the oil gas filtering device is convenient to disassemble, assemble and maintain on the premise of ensuring the space of the generator set.
Furthermore, the angle of the volute air outlet in the centrifugal ventilator 1 is matched with the angle of the base air inlet, so that the smoothness of the cooling air path is ensured. Specifically, as shown in fig. 4, the offset angle θ of the volute is 12.31 °, which can effectively avoid the air path collision.
Furthermore, the air outlet of the engine base and the air inlet of the engine base are respectively provided with a temperature sensor A, and the temperature sensors A are arranged at the air outlet of the engine base and the air inlet of the engine base through mounting interfaces, so that the air temperature condition at the air inlet/air outlet can be monitored in real time when the generator runs.
Preferably, as shown in fig. 5-6, the square rib plate of the base is changed into a circular rib plate, so that eddy current can be effectively avoided, and the air path can be smoother; and the air guide plates are distributed at the air outlet of the machine base, so that hot air can uniformly enter the heat exchange device 2, and the utilization rate and the heat exchange efficiency of the heat exchange core body in the heat exchange device 2 are improved. Specifically, the aviation baffle welds in the cooling system air intake department of box 10, and the quantity is one or more, and the shape is the plectane or right angle board, and the material is ordinary steel sheet.
Further, the heat exchange device 2 is provided with a cooling liquid water inlet 4 and a cooling liquid water outlet 5, and the cooling liquid water outlet 5 is connected with a stator water jacket water outlet through a water return pipe 6; connecting flanges are respectively installed on the cooling liquid water inlet 4 and the cooling liquid water outlet 5, the connecting flange face is provided with an installation interface for installing a temperature sensor B, and the temperature sensor B is used for monitoring the temperature of the cooling liquid in and out in real time.
Preferably, the water return pipe 6 consists of a hose and flanges at two ends, one end of the water return pipe is connected with the coolant outlet 5 through the flanges, and the other end of the water return pipe is connected with the stator water jacket outlet, so that the space of a cabin is saved, and the unified management of the unit is facilitated.
Further, the heat exchange device 2 comprises a heat exchange core body, the heat exchange core body is a plate-fin type air-water heat exchange core body made of aluminum alloy, and the heat exchange device has the characteristics of high heat exchange efficiency, light weight, corrosion resistance and the like. Specifically, inside box 10 was arranged in to board fin formula empty water heat transfer core, passed through the bolt fastening with box 10, the structure dismouting is simple.
Further, a leakage alarm 9 and a leakage interface are respectively arranged on the side edge of the bottom of the heat exchange device 2 and used for monitoring the leakage condition of the cooling liquid, so that the reliability is high; an exhaust valve 12 is further arranged at the top of the heat exchanger 2 to ensure the safety of the heat exchange work of the heat exchanger 2.
Further, the number of the centrifugal fans 1 is two, and each centrifugal fan 1 includes a motor, an impeller, a volute, and a collector.
Further, referring to fig. 7, the box 10 is of a split structure, and if the top and radial space of the generator base are insufficient, the rear box of the box 10 of the cooling system and the box where the heat exchanging device 2 is located can be designed to be of a split structure, that is, the box 10 of the cooling system is of a three-section structure, so that the maintainability and the maintainability efficiency can be greatly improved. If the top and radial space of the generator base are sufficient, the heat exchange core body in the heat exchange device 2 is designed into a plug-in structure, so that the maintainability is ensured, and meanwhile, the manufacturing cost is reduced.
The cooling system has the following specific working process:
referring to fig. 2-3, the cooling system is mounted on the top of the generator frame 10 by bolts through the connecting flanges at the air inlet and the air outlet of the frame. When the centrifugal fan 1 works, cold air passing through the heat exchange device 2 enters an impeller space along the axial direction, is accelerated under the driving of an impeller rotating at a high speed, is collected and guided by a volute and a current collector, is decelerated and changes the flow direction, enters the inside of a generator, takes away the heat of the generator through an air gap, and hot air enters the inside of a cooling system through a machine base air outlet and is obtained through the oil-gas filtering device 3 and the heat exchange core body.
In summary, the cooling system provided by the invention is internally provided with the centrifugal ventilator 1, the heat exchange device 2, the oil-gas filtering device 3 and other components, and can be installed at the top of the generator base 11, as shown in fig. 2, the cooling system has a simple structure, is easy to assemble and disassemble, and reduces the axial length of the engine room; the reliability of the operation of the generator can be improved through the oil gas filtering device 3, the wind temperature sensor, the water temperature sensor, the leakage alarm 9 and the like; the volute air outlet of the centrifugal fan 1 is designed into a structure matched with the angle of the base air inlet, so that the cooling air path can be optimized, and cooling liquid can directly act on a heat source, and the centrifugal fan has the advantages of small energy transfer path and high cooling efficiency.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present 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 is to be understood that the present 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 (10)
1. A cooling system of a semi-direct drive wind driven generator is characterized by comprising a box body (10) arranged at the top of a generator base (11); the bottom of the box body (10) is provided with a cooling system air inlet (8) and a cooling system air outlet (7), and the cooling system air inlet (8) and the cooling system air outlet (7) are arranged oppositely; the oil gas filtering device (3), the heat exchange device (2) and the centrifugal fan (1) are sequentially distributed in the box body (10), when the centrifugal fan (1) works, hot air flows out of the air outlet of the engine base and enters the box body (10) through the air inlet (8) of the cooling system, and then the hot air sequentially passes through the oil gas filtering device (3) and the heat exchange device (2) to obtain cold air, and the cold air flows out of the air outlet (7) of the cooling system and enters the generator through the air inlet of the engine base.
2. The cooling system of the semi-direct drive wind driven generator according to claim 1, wherein the oil gas filtering device (3) and the heat exchanging device (2) are fixed inside the box body (10) through bolts respectively.
3. The cooling system of the semi-direct drive wind driven generator according to claim 2, wherein a plurality of groups of filter cotton or oil-gas separators are arranged in the oil-gas filtering device (3).
4. The cooling system of a semi-direct drive wind driven generator according to claim 1, characterized in that the angle of the volute outlet of the centrifugal fan (1) is adapted to the angle of the base inlet.
5. The cooling system of a semi-direct drive wind driven generator according to claim 1, wherein the air outlet of the base and the air inlet of the base are respectively provided with a temperature sensor A.
6. The cooling system of the semi-direct drive wind driven generator according to claim 1, wherein the heat exchange device (2) is provided with a coolant water inlet (4) and a coolant water outlet (5), and the coolant water outlet (5) is connected with the stator water jacket water outlet through a water return pipe (6).
7. The cooling system of the semi-direct drive wind driven generator according to claim 6, wherein the heat exchange device (2) comprises a heat exchange core body, and the heat exchange core body is a plate-fin type air-water heat exchange core body made of aluminum alloy.
8. The cooling system of a semi-direct drive wind driven generator according to claim 6, wherein the coolant inlet (4) and the coolant outlet (5) are respectively provided with a connecting flange, and the connecting flange is provided with a mounting interface for mounting the temperature sensor B.
9. The cooling system of the semi-direct drive wind driven generator according to claim 1, characterized in that the bottom side of the heat exchange device (2) is provided with a leakage alarm (9) and a leakage interface respectively.
10. The cooling system of a semi-direct drive wind generator according to claim 1, characterized in that the number of the centrifugal ventilators (1) is two, and each centrifugal ventilator (1) comprises a motor, an impeller, a volute and a collector;
when the centrifugal fan (1) works, cold air passing through the heat exchange device (2) enters an impeller space along the axial direction, is accelerated under the driving of an impeller rotating at a high speed, is decelerated and changes the flow direction after being collected and guided by a volute and a current collector, enters the inside of a generator, takes away the heat of the generator through an air gap, and hot air enters the inside of a cooling system through an air outlet of a machine base and is obtained after passing through the oil-gas filtering device (3) and the heat exchange device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210901653.1A CN115199490A (en) | 2022-07-28 | 2022-07-28 | Cooling system of semi-direct-drive wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210901653.1A CN115199490A (en) | 2022-07-28 | 2022-07-28 | Cooling system of semi-direct-drive wind driven generator |
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| CN115199490A true CN115199490A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210901653.1A Pending CN115199490A (en) | 2022-07-28 | 2022-07-28 | Cooling system of semi-direct-drive wind driven generator |
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| CN (1) | CN115199490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115940488A (en) * | 2023-02-27 | 2023-04-07 | 江苏兆胜空调有限公司 | Wind power generation adaptation cooling system |
-
2022
- 2022-07-28 CN CN202210901653.1A patent/CN115199490A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115940488A (en) * | 2023-02-27 | 2023-04-07 | 江苏兆胜空调有限公司 | Wind power generation adaptation cooling system |
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