CN216981728U - Oil cooling structure of semi-direct-drive wind driven generator - Google Patents
Oil cooling structure of semi-direct-drive wind driven generator Download PDFInfo
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- CN216981728U CN216981728U CN202220138220.0U CN202220138220U CN216981728U CN 216981728 U CN216981728 U CN 216981728U CN 202220138220 U CN202220138220 U CN 202220138220U CN 216981728 U CN216981728 U CN 216981728U
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Abstract
The utility model discloses an oil cooling structure of a semi-direct-drive wind driven generator, which comprises a shell, a rear end cover, a stator assembly, a rotor assembly and a bearing unit, wherein the shell and the rear end cover are matched and connected to form a closed structure; the oil cooling structure comprises an oil injection device, an oil through groove, an oil throwing disc and an oil return groove, wherein the oil injection device is arranged on the upper portion of the periphery of the stator assembly, the oil through groove is arranged on the outer peripheral face of the stator core along the circumferential direction of the stator core, the oil throwing disc is arranged at two ends of the rotor assembly, and the oil return groove is arranged at the bottom of the shell. The utility model can effectively solve the problem of cooling the semi-direct-drive wind driven generator.
Description
Technical Field
The utility model relates to the technical field of cooling of a semi-direct-drive wind driven generator, in particular to an oil cooling structure of the semi-direct-drive wind driven generator.
Background
Along with the development of the wind power market, the single machine capacity of the wind power complete machine is continuously enlarged. The weight and the volume of the generator are correspondingly increased, the requirement on the strength of a tower of the wind generating set is high, and the hoisting and transportation difficulty of the wind generating set is increased. Therefore, increasing the power density of the generator is an inevitable trend in the development of wind power generators, and how to optimize the generator cooling system so as to reduce the temperature rise of the generator is also a main research direction.
At present, the wind driven generator generally adopts an air cooling or water cooling mode, the integral heat dissipation effect of the air cooling mode is not as good as that of the water cooling mode, the generator structure is compact to a semi-direct-drive wind driven generator, the heat dissipation area of a cooling loop is not enough, and the air cooling structure cannot meet the heat dissipation requirement of a high-power generator. Although water cooling is the mainstream heat dissipation mode of the current high-power generator, due to the structural defects, the heat source (such as a stator winding) of the generator itself can be transferred to the cooling water pipe or the cooling water jacket through the layer-by-layer material, the transfer path is long, and the fit tolerance between the components can further influence the thermal resistance of the transfer path.
In the prior art, a cooling mode of direct oil cooling of a motor is adopted, and the cooling mode is generally divided into an oil immersion cooling mode and an oil injection cooling mode. The oil immersion cooling mode is to immerse the stator and the rotor of the motor in cooling oil for cooling, the requirement on the whole sealing of the generator is high, the oil agitation loss of the rotor is also high, and the oil immersion cooling mode is difficult to realize and has high cost for the wind driven generator with large volume.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, provides an oil cooling structure of a semi-direct-drive wind driven generator, and can effectively solve the problem of cooling of the semi-direct-drive wind driven generator.
In order to achieve the purpose, the technical scheme provided by the utility model is as follows: an oil cooling structure of a semi-direct-drive wind driven generator comprises a shell, a rear end cover, a stator assembly, a rotor assembly and a bearing unit, wherein the shell and the rear end cover are matched and connected to form a closed structure; the oil cooling structure comprises an oil injection device, an oil through groove, an oil throwing disc and an oil return groove, the oil injection device is arranged on the upper part of the periphery of the stator component, the oil injection device is used for carrying out oil injection cooling on the stator core and the end part of the stator winding of the stator assembly, the oil through groove is arranged on the outer peripheral surface of the stator core along the circumferential direction of the stator core, the oil sprayed to the surface of the stator component flows to the stator winding, the rotor component and the bearing unit in the stator component in sequence through the oil groove, further cooling the stator winding, the rotor assembly and the bearing unit, the oil thrower is arranged at two ends of the rotor assembly, the oil flowing to the rotor component is thrown to the end part of the stator winding through the oil thrower so as to avoid the local overheating of the stator winding, the oil return groove is formed in the bottom of the shell, and the cooled oil is collected through the oil return groove and flows back to an external oil supply system.
Furthermore, fueling injection equipment includes that a plurality of arcs spout oil pipe, and a plurality of arcs spout oil pipe interval and arrange on stator module's periphery upper portion, and this a plurality of arcs spout oil pipe and pass through pipeline and the outside oil feeding system of shell, and every arc spouts oil pipe and is formed with a plurality of nozzle openings on stator module's the side, carries out the oil spout cooling through nozzle opening to stator module's stator core and the upper portion of stator winding tip.
Further, the rotor assembly is spaced apart from the rear end cover by a labyrinth structure to prevent oil from leaking outside the enclosure structure.
Further, the oil thrower plate is fixed on a rotor support of the rotor assembly.
Further, an arc-shaped oil spraying pipe is arranged above the collecting ring of the stator assembly.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the cooling oil liquid has the characteristics of good insulating property, non-magnetic conductivity and non-conductivity, so that the cooling oil liquid has no influence on a magnetic circuit of the motor and does not need special insulation and electromagnetic design; in addition, the boiling point and the condensation point of the oil are higher than those of cooling water, so that the cooling oil is not easy to freeze at low temperature, is not easy to evaporate or volatilize at high temperature, and has stronger adaptability to the severe environment of a wind field; meanwhile, the cooling oil can form an oil film in the whole generator, so that the problems of corrosion of a water cooling system and the like are avoided, the maintenance frequency of the whole cooling system can be reduced, and the reduction of heat dissipation capacity caused by aging is avoided.
2. The cooling efficiency of the direct oil cooling is about 2-5 times higher than that of the common water cooling, so that the heat dissipation efficiency is greatly improved, an additional complex oil supply system is not needed, the material consumption of the generator and the performance requirement of magnetic steel can be greatly reduced while the temperature rise of the generator is ensured to meet the requirement, the material cost is reduced, and the purposes of reducing the temperature rise of the generator and improving the power density are achieved.
Drawings
Fig. 1 is a schematic view of an oil-cooled structure of the present invention.
Fig. 2 is a schematic structural diagram of the oil injection device and the oil through groove on the stator assembly.
Fig. 3 is a schematic structural diagram of the oil injection device of the utility model on a stator assembly.
Figure 4 is a schematic view of the configuration of the inventive oil slinger on the rotor assembly.
Fig. 5 is a schematic structural view of the arc-shaped oil spray pipe of the utility model.
Detailed Description
The present invention is further illustrated with reference to the following specific examples, but the mode of use of the present invention is not limited thereto.
Example 1
As shown in fig. 1 to 5, the oil cooling structure of the half-direct drive wind turbine generator according to this embodiment includes a housing 1, a rear end cap 2, a stator assembly 3, a rotor assembly 4, and a bearing unit 5, where the housing 1 and the rear end cap 2 are connected in a matching manner to form a closed structure, the stator assembly 3, the rotor assembly 4, and the bearing unit 5 are disposed inside the closed structure, where the rotor assembly 4 is disposed on the bearing unit 5, the rotor assembly 4 mainly includes a rotor support 401 and a permanent magnet magnetic pole 402, the stator assembly 3 is connected to the housing 1 and is disposed outside the rotor assembly 4 in a matching manner, the stator assembly 3 mainly includes a stator core 301, a stator winding 302, and a current collecting ring 303, and the rotor assembly 4 and the rear end cap 2 are spaced apart from each other by a labyrinth structure 10 to prevent oil from leaking outside the closed structure.
The oil cooling structure comprises an oil spraying device 6, an oil through groove 7, an oil throwing disc 8 and an oil return groove 9.
Specifically, fueling injection equipment 6 locates stator module 3's periphery upper portion, it includes that a plurality of arcs spout oil pipe 601, a plurality of arcs spout oil pipe 601 interval and arrange on stator module 3's periphery upper portion, this a plurality of arcs spout oil pipe 601 passes through pipeline and the outside oil feeding system of shell 1, every arc spouts oil pipe 601 and is formed with a plurality of nozzle 602 on stator module 3's the side, oil spout cooling is carried out to the upper portion of stator core 301 and stator winding 302 tip through nozzle 602 spun fluid, wherein, lie in being used for cooling stator winding 302 tip at both ends among a plurality of arcs spout oil pipe 601, lie in the centre and be used for cooling stator core 301, rely on the action of gravity, fluid can cover the whole outer peripheral face of stator core 301 basically.
Lead to on oil groove 7 locates stator core 301's circumference along stator core 301's circumference, make some fluid that spout to stator module 3 surface flow to stator winding 302 in proper order through leading to oil groove 7, on permanent magnet magnetic pole 402 and the bearing unit 5, and then to stator winding 302, permanent magnet magnetic pole 402 and bearing unit 5 cool off, because aerogenerator has certain installation inclination, adopt the mounting means that the front end upsloped promptly, some fluid relies on the action of gravity to flow to the rear end in addition, at this in-process, rotor subassembly 4's rotation also can play refrigerated effect to permanent magnet magnetic pole 402, fluid can play the lubrication action to bearing unit 5.
The oil thrower 8 is arranged on the rotor supports 401 at two ends of the rotor assembly 4, oil which cools the bearing unit 5 directly flows downwards to the rotor supports 401, and is collected by the oil thrower 8 and thrown to the inner circumferential surface of the end part of the stator winding 302 again, particularly the inner circumferential surface of the lower part, so that the end part of the stator winding 302 is cooled for the second time, the cooling effect is improved, and the local overheating of the stator winding 302 is avoided.
The oil return groove 9 is arranged at the bottom of the shell 1, and the cooled oil is collected through the oil return groove 9 and flows back to an external oil supply system.
Example 2
The present embodiment is different from embodiment 1 in that: an arc-shaped oil spraying pipe 601 is also arranged above the collecting ring 303 of the stator assembly 3 and used for cooling the collecting ring 303.
According to simulation calculation, the cooling efficiency of the direct oil cooling mode is about 2-5 times higher than that of the common water cooling mode, the heat dissipation efficiency is greatly improved, an additional complex oil supply system is not needed, the material consumption of the generator and the performance requirement of magnetic steel can be greatly reduced while the temperature rise of the generator is ensured to meet the requirement, the material cost is reduced, and the purposes of reducing the temperature rise of the generator and improving the power density are achieved.
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.
Claims (5)
1. An oil cooling structure of a semi-direct-drive wind driven generator comprises a shell, a rear end cover, a stator assembly, a rotor assembly and a bearing unit, wherein the shell and the rear end cover are matched and connected to form a closed structure; the method is characterized in that: the oil cooling structure comprises an oil injection device, an oil through groove, an oil throwing disc and an oil return groove, the oil injection device is arranged on the upper part of the periphery of the stator component, the oil injection device is used for carrying out oil injection cooling on the stator core and the end part of the stator winding of the stator assembly, the oil through groove is arranged on the outer peripheral surface of the stator core along the circumferential direction of the stator core, the oil sprayed to the surface of the stator component flows to the stator winding, the rotor component and the bearing unit in the stator component in sequence through the oil groove, further cooling the stator winding, the rotor assembly and the bearing unit, the oil thrower is arranged at two ends of the rotor assembly, the oil flowing to the rotor component is thrown to the end part of the stator winding through the oil thrower so as to avoid the local overheating of the stator winding, the oil return groove is formed in the bottom of the shell, and the cooled oil is collected through the oil return groove and flows back to an external oil supply system.
2. The oil cooling structure of the semi-direct drive wind driven generator according to claim 1, characterized in that: the oil injection device comprises a plurality of arc-shaped oil injection pipes, the arc-shaped oil injection pipes are arranged on the upper portion of the periphery of the stator assembly at intervals, the arc-shaped oil injection pipes pass through pipelines and an oil supply system outside the shell, a plurality of oil injection holes are formed in the side face, facing the stator assembly, of each arc-shaped oil injection pipe, and oil injection cooling is conducted on the stator core of the stator assembly and the upper portion of the end portion of the stator winding through the oil injection holes.
3. The oil cooling structure of the semi-direct drive wind driven generator according to claim 1, characterized in that: the rotor assembly is spaced apart from the rear end cover by a labyrinth structure to prevent oil from leaking outside the enclosure.
4. The oil cooling structure of the semi-direct drive wind driven generator according to claim 1, characterized in that: the oil thrower is fixed on a rotor bracket of the rotor assembly.
5. The oil cooling structure of the semi-direct drive wind driven generator according to claim 1, characterized in that: and an arc-shaped oil spraying pipe is arranged above the collecting ring of the stator assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220138220.0U CN216981728U (en) | 2022-01-19 | 2022-01-19 | Oil cooling structure of semi-direct-drive wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220138220.0U CN216981728U (en) | 2022-01-19 | 2022-01-19 | Oil cooling structure of semi-direct-drive wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216981728U true CN216981728U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220138220.0U Active CN216981728U (en) | 2022-01-19 | 2022-01-19 | Oil cooling structure of semi-direct-drive wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216981728U (en) |
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2022
- 2022-01-19 CN CN202220138220.0U patent/CN216981728U/en active Active
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