阅读说明：本技术 一种海上大功率发电机板式交叉逆流空气冷却系统 (Plate-type cross countercurrent air cooling system of marine high-power generator ) 是由 章政华 于 2020-06-10 设计创作，主要内容包括：本发明公开了一种海上大功率发电机板式交叉逆流空气冷却系统,包括柜体、冷却芯组组件、内风路进风口组件、外风路进风口组件、内风路出风口和外风路出风口,所述冷却芯组组件设于柜体内部,所述柜体的一端形成有两个内风路进风口,每个内风路进风口上均装有内风路进风口组件,其另一端形成有内风路出风口,所述柜体的一侧上形成有两个外风路进风口,每个外风路进风口上均装有外风路进风口组件,其另一侧形成有外风路出风口。本发明具有结构简单、重量轻、体积小、换热效率高、防水性能和防腐蚀性能好等优点。(The invention discloses a plate-type cross countercurrent air cooling system of an offshore high-power generator, which comprises a cabinet body, a cooling core group assembly, an inner wind path air inlet assembly, an outer wind path air inlet assembly, an inner wind path air outlet and an outer wind path air outlet, wherein the cooling core group assembly is arranged inside the cabinet body, two inner wind path air inlets are formed at one end of the cabinet body, an inner wind path air inlet assembly is arranged on each inner wind path air inlet, an inner wind path air outlet is formed at the other end of the cabinet body, two outer wind path air inlets are formed on one side of the cabinet body, an outer wind path air inlet assembly is arranged on each outer wind path air inlet, and an outer wind path air outlet is formed at the other side of the. The invention has the advantages of simple structure, light weight, small volume, high heat exchange efficiency, good waterproof performance and corrosion resistance, and the like.)

1. The utility model provides a board-like cross counterflow air cooling system of marine high-power generator which characterized in that: the cooling core assembly is arranged inside the cabinet body, two inner wind path air inlets are formed at one end of the cabinet body, an inner wind path air inlet assembly is arranged on each inner wind path air inlet, hot air is sucked into the cooling core assembly from an air outlet in the middle of the generator through the two inner wind path air inlets, an inner wind path air outlet is formed at the other end of the cabinet body, an inner wind path of the cooling system is formed by the inner wind path air inlet assembly, the cooling core assembly and the inner wind path air outlet, two outer wind paths are formed on one side of the cabinet body, an outer wind path air inlet assembly is arranged on each outer wind path air inlet, and the air is changed into cool air after air heat exchange is carried out between the outer air sucked by the two outer wind path air inlets and the hot air in the cooling core assembly, and an outer wind path air outlet is formed on the other side of the cooling system, an outer wind path of the cooling system is formed by the outer wind path air inlet assembly, the cooling core assembly and the outer wind path air outlet, cold air subjected to heat exchange between the inner wind path and the outer wind path is finally fed back into the generator through the inner wind path air outlet, and hot air subjected to heat exchange is discharged from the outer wind path air outlet, so that internal circulation of a cooling medium of the generator is formed.

2. The plate type cross-counterflow air cooling system for marine high-power generators of claim 1, wherein: the cooling core pack assembly includes a plurality of core pack modules arranged in a matrix.

3. The plate type cross-counterflow air cooling system for marine high-power generators of claim 2, wherein: the core group module consists of a heat exchange toothed plate and an external support frame for fixing the heat exchange toothed plate.

4. The plate type cross-counterflow air cooling system for marine high-power generators of claim 3, wherein: the heat exchange toothed plate is an aluminum sheet with an epoxy resin coating, and the thickness of the aluminum sheet is 0.2 mm.

5. The plate type cross-counterflow air cooling system for marine high-power generators of claim 1, wherein: the inner air path air inlet assembly comprises an inner air path centrifugal fan, an inner air path variable frequency driving motor and an inner air path wind scooper, wherein the inner air path variable frequency driving motor is used for driving the inner air path centrifugal fan to rotate, and the inner air path wind scooper is arranged on the inner air path centrifugal fan.

6. The plate type cross-counterflow air cooling system for marine high-power generators of claim 1, wherein: the outer wind path air inlet assembly comprises an outer wind path axial flow fan, an outer wind path variable frequency driving motor used for driving the outer wind path axial flow fan to rotate and an outer wind path wind scooper arranged on the outer wind path axial flow fan.

7. The plate type cross-counterflow air cooling system for marine high-power generators of claim 1, wherein: and an air guide cover is arranged at the air outlet of the inner air passage.

Technical Field

The invention relates to the technical field of offshore wind power generators, in particular to a plate type cross countercurrent air cooling system of an offshore high-power generator.

Background

As known in the art, the permanent magnet wind driven generator has the characteristics of high efficiency, high power factor, light weight, simple structure, high reliability, high power density and the like; when the generator operates, a large amount of heat generated by iron loss, copper loss, stray loss and the like can be generated, and if the generator does not operate, heat exchange and discharge can not be effectively carried out in time, so that the normal operation of the generator is influenced; but the heat exchange power of the cooling system cannot be more than or less than the heat loss generated by the generator. Therefore, when a generator cooling system is designed, the matching between the generator loss and the heat exchange power of the cooling system needs to be fully considered. The existing wind power generator cooling system has the advantages that the inner wind path does not have a fan, cooling medium circulation is realized by fans at two ends of a generator rotor, and the length of the rotor must be considered to be capable of being provided with the fans when the generator is designed, so that the whole length of the generator is lengthened, the size of the generator is increased, and the power density of the generator is reduced. In addition, if the fan is arranged on the rotor, the cooling effect and the mechanical power loss of the fan are closely related to the rotating speed of the generator, the heat exchange effect and the efficiency of the generator are influenced, the single fan is adopted in the outer air path, once the single fan is damaged, the generator cannot operate, the reliability of the unit is reduced, and the power loss of the fan during low-power operation of the unit is larger, so that the efficiency of the generator is influenced. Meanwhile, the existing cooling system adopts a radiating pipe to carry out heat exchange, the heat exchange efficiency is low, for a high-power generator, the size of the cooling system needs to be designed to be large, and the heat exchange power can be matched with the heat loss of the generator. However, the generator cooling system needs to be installed at a height of several hundred meters, so that the weight and the overall size of the whole cooling system are not too large. And the generator cooling system is arranged on the sea, the environment of humidity and salt fog is severe, once rainwater, moisture and the like enter the generator, the insulation resistance of the stator winding is low, the risk of burning the generator is caused, and the sealing waterproof performance and the corrosion resistance of the generator are very important.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the plate-type cross countercurrent air cooling system of the marine high-power generator, which has the advantages of simple structure, light weight, small volume, high heat exchange efficiency and good waterproof performance and corrosion resistance.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a board-like alternately air cooling system against current of marine high-power generator, includes the cabinet body, cools off core group subassembly, interior wind path air intake subassembly, outer wind path air intake subassembly, interior wind path air outlet and outer wind path air outlet, the internal portion of cabinet is located to cool off core group subassembly, the one end of the cabinet body is formed with two interior wind path air intakes, all is equipped with interior wind path air intake subassembly on every interior wind path air intake, through these two interior wind path air intake subassemblies hot-blast from generator middle part air outlet suction cooling core group subassembly inside, its other end is formed with interior wind path air outlet, constitutes cooling system's interior wind path by interior wind path air intake subassembly, cooling core group subassembly and interior wind path air outlet, be formed with two outer wind path air intakes on one side of the cabinet body, all be equipped with outer wind path air intake subassembly on every outer wind path air intake, become after carrying out the air heat exchange with the inside hot-blast of cooling core group subassembly through two outer And the other side of the wind channel is provided with an outer wind channel air outlet, an outer wind channel of the cooling system is formed by the outer wind channel air inlet assembly, the cooling core assembly and the outer wind channel air outlet, the cool wind after heat exchange of the inner wind channel and the outer wind channel is finally fed back into the generator through the inner wind channel air outlet, and the heat-exchanged hot wind is discharged from the outer wind channel air outlet, so that the internal circulation of a cooling medium of the generator is formed.

Further, the cooling core pack assembly includes a plurality of core pack modules arranged in a matrix.

Further, the core group module is composed of a heat exchange toothed plate and an external supporting frame for fixing the heat exchange toothed plate.

Further, the heat exchange toothed plate is an aluminum sheet with an epoxy resin coating, and the thickness of the aluminum sheet is 0.2 mm.

Further, the inner wind path air inlet assembly comprises an inner wind path centrifugal fan, an inner wind path variable frequency driving motor for driving the inner wind path centrifugal fan to rotate and an inner wind path wind scooper arranged on the inner wind path centrifugal fan.

Further, the outer wind path air inlet assembly comprises an outer wind path axial flow fan, an outer wind path variable frequency driving motor for driving the outer wind path axial flow fan to rotate and an outer wind path wind scooper arranged on the outer wind path axial flow fan.

Furthermore, an air guide cover is arranged at the air outlet of the inner air passage.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the invention has simple structure, small volume and light weight, and the double-fan structure is adopted to ensure that the flow velocity and the air pressure at each position of the cooling medium passing through the cooling core group are uniform, thereby fully utilizing the heat exchange area of the heat exchange toothed plate and greatly improving the heat exchange efficiency of the cooling system. Meanwhile, the driving motor of the fan adopts a variable frequency driving motor and two-way redundancy design, so that the reliability and the utilization efficiency of the cooling system are improved.

2. The inner wind path of the invention is provided with the double-fan structure, so that the design of the generator is free from considering the installation of fans at two ends of the rotor, the design of the motor is convenient, the axial length of the generator can be reduced, the space of the generator base is fully utilized, and the power density of the generator is greatly improved. And outer wind path variable frequency driving motor and interior wind path variable frequency driving motor all can adopt open bearing structure, adopts sealed bearing for current cooling system fan motor, can carry out the interpolation and the waste oil discharge of lubricating grease, and convenient maintenance has prolonged the life of motor.

3. The invention can ensure that the cooling medium in the generator only exchanges heat with the external air in the cooling core assembly and is mutually isolated, so that cross contamination of the internal air and the external air is avoided, and the corrosion of components caused by the external moisture and salt mist entering the generator can be effectively avoided, thereby ensuring the protection grade of the generator. Meanwhile, the heat exchange power of the whole cooling system can be adjusted by controlling the operation number of the centrifugal fans of the inner air path or the operation frequency of the variable-frequency driving motor of the inner air path according to the operation environment temperature and the output power of the generator, so that the heat balance of the generator and the cooling system is dynamic balance, the thermal stability of the generator in different operation states is met, and the efficiency of the generator is optimal.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of fig. 1 with parts removed.

Fig. 3 is a schematic structural view of a core pack module according to the present invention.

Fig. 4 is a schematic structural diagram of the internal air duct air inlet assembly of the present invention.

Fig. 5 is a schematic structural diagram of an external air duct intake assembly according to the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples.

As shown in fig. 1 to 5, the plate-type cross-counterflow air cooling system for marine high-power generators of this embodiment is installed above a generator, and includes a cabinet 1, a cooling core group assembly 2, an inner wind path air inlet assembly 3, an outer wind path air inlet assembly 4, an inner wind path air outlet 5, and an outer wind path air outlet (not shown in the figure), where the cooling core group assembly 2 includes a plurality of core group modules, and the plurality of core group modules are arranged inside the cabinet 1 in a matrix shape, each core group module is composed of a heat exchange toothed plate 201 and an external support frame 202 for fixing the heat exchange toothed plate 201, the heat exchange toothed plate 201 is an aluminum plate with an epoxy resin coating, and the aluminum plate has a thickness of 0.2mm, and has the advantages of light weight, good heat exchange effect, and strong corrosion resistance; two inner air path air inlets are formed at one end of the cabinet body 1, each inner air path air inlet is provided with an inner air path air inlet assembly 3, each inner air path air inlet assembly 3 comprises an inner air path centrifugal fan 301, an inner air path variable frequency driving motor 302 for driving the inner air path centrifugal fan 301 to rotate and an inner air path wind scooper 303 arranged on the inner air path centrifugal fan 301, hot air is sucked into the cooling core assembly 2 from the middle air outlet of the generator through the two inner air path air inlet assemblies 3, an inner air path air outlet 5 is formed at the other end of the inner air path air inlet assembly, a wind scooper (not shown in the figure) is arranged, and the inner air path air inlet assembly 3, the cooling core assembly 2 and the inner air path air outlet 5 form an inner air path of the cooling system; two outer wind path air inlets are formed on one side of the cabinet body 1, each outer wind path air inlet is provided with an outer wind path air inlet assembly 4, each outer wind path air inlet assembly 4 comprises an outer wind path axial flow fan 401, an outer wind path variable frequency driving motor 402 for driving the outer wind path axial flow fan 401 to rotate and an outer wind path air guide cover 403 arranged on the outer wind path axial flow fan 401, the outer air sucked by the two outer wind path air inlet assemblies 4 is subjected to air heat exchange with the hot air in the cooling core assembly 2 and then is changed into cold air, an outer wind path air outlet (not shown) is formed on the other side of the outer wind path air inlet assembly, the outer wind path air inlet assembly 4, the cooling core assembly 2 and the outer wind path air outlet form an outer wind path of the cooling system, the cold air subjected to heat exchange through the inner wind path and the outer wind path is finally sent back to the inside the generator through the inner wind path air outlet 5, and the outer wind path air outlet discharges the, therefore, internal circulation of a cooling medium of the generator is formed, the stator and the rotor of the generator are cooled, the generator is always in a thermal balance state in operation, and the temperature rise of the motor is kept stable.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that variations based on the shape and principle of the present invention should be covered within the scope of the present invention.