CN117767664A - Nacelle propulsion motor cooling structure - Google Patents
Nacelle propulsion motor cooling structure Download PDFInfo
- Publication number
- CN117767664A CN117767664A CN202410003992.7A CN202410003992A CN117767664A CN 117767664 A CN117767664 A CN 117767664A CN 202410003992 A CN202410003992 A CN 202410003992A CN 117767664 A CN117767664 A CN 117767664A
- Authority
- CN
- China
- Prior art keywords
- rotor
- oil
- propulsion motor
- cooling structure
- nacelle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 41
- 239000003381 stabilizer Substances 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims description 26
- 239000013535 sea water Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 14
- 238000012423 maintenance Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a nacelle propulsion motor cooling structure, which comprises a stand, stabilizer fins connected to the lower part of the stand, a stator and a rotor, wherein the stator and the rotor are arranged in the stand, the stator consists of an iron core, a straight-line section winding and an end winding, and the rotor consists of a rotor shaft, a rotor yoke and a rotor permanent magnet pole; the invention fully utilizes the stabilizer structure of the nacelle propeller, solves the problem that the local part of the propulsion motor is not well cooled, simultaneously realizes cold and hot self-circulation inside without an external interface, reduces the volume and weight of the motor and improves the overall efficiency of the nacelle propeller.
Description
Technical Field
The invention belongs to the technical field of electric propulsion of ships and ocean engineering, and particularly relates to a cooling structure of a nacelle propulsion motor.
Background
The pod propeller is a highly integrated ship electric propeller device, which integrates a propulsion motor and a propeller, and is placed outside a cabin together, wherein the propulsion motor is generally a permanent magnet motor, and a rotor is composed of permanent magnets.
The nacelle propeller has simple and compact overall structure, small volume and flexible installation. The smaller the propulsion motor of the pod propeller is, the smaller the overall hub diameter ratio is, the higher the overall hydrodynamic efficiency is, and the lighter the weight is, the lower the installation difficulty is.
At present, although the outer surface of the propulsion motor is soaked in seawater and can be cooled, the heat of an end winding of a stator needs to be firstly transmitted back to a straight-line section of an iron core and then transmitted to a stand, so that the thermal resistance is large, meanwhile, the heat of a rotor magnetic pole is difficult to dissipate, and the local temperature is easy to be too high after a long time. Some motors are very high in cost and long in time and have the risk of cracking by integrally encapsulating the end part of a stator, or the thermal load of the motor is reduced, but the volume and the weight are increased, or an external cooling medium is introduced, but the motor needs to pass through the slip ring part of the nacelle propeller, the structure is very complex, a secondary cooling system is also required to be arranged in a cabin, the volume and the weight are occupied, and the difficulty of the system is also increased.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a cooling structure of a nacelle propulsion motor, which aims at optimizing the heat dissipation problem of a stator end winding and a rotor.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the nacelle propulsion motor cooling structure comprises a machine base, stabilizer fins connected to the lower part of the machine base, a stator and a rotor, wherein the stator and the rotor are arranged in the machine base, the stator consists of an iron core, a straight-line section winding and an end winding, and the rotor consists of a rotor shaft, a rotor yoke and a rotor permanent magnet pole; the oil cooling system is characterized in that a spray cooling system consisting of a pump group, a connecting pipeline and a spray header is arranged at the end winding in the engine base, an oil storage bin communicated with the engine base is arranged in the stabilizer, the oil storage bin is used as an oil storage and cooling space, the spray header arranged near the end winding sprays oil to directly cool the relevant areas of the end parts of the stator and the rotor, heated oil falls into the oil storage bin of the stabilizer at the lower part of the engine base to exchange heat to the outer surface of the engine base to be cooled by outside seawater, and then the heated oil is pumped back to the spray cooling system by the pump group and sprayed out through the spray header to form internal self-circulation cooling.
According to the cooling structure of the nacelle propulsion motor, the gap channel arranged at the lower part of the iron core is arranged in the engine base to form an oil channel, so that oil flowing back to the oil storage bin is conveniently introduced into the pump set through the oil inlet of the oil injection device.
According to the nacelle propulsion motor cooling structure, the base is further provided with the liquid level meter, and the pump group can adjust the rotating speed of the pump group according to the feedback signal of the liquid level meter to freely adjust the liquid level height according to the requirement.
The cooling structure of the nacelle propulsion motor has a plurality of groups of spray heads which face the end winding, the rotor and the pump group respectively.
According to the cooling structure of the nacelle propulsion motor, the stabilizer and the engine base can be connected through bolts or welding, so that the stabilizer is fixed on the engine base.
According to the nacelle propulsion motor cooling structure, the filter can be arranged at the inlet of the pump group according to the requirement.
According to the nacelle propulsion motor cooling structure, the pump unit is arranged at the position close to the end cover of the engine base through the oil pump mounting seat as far as possible, and the end cover is correspondingly provided with the maintenance window.
The beneficial effects of the invention are as follows: through setting up spray set at motor stator and rotor tip position, through the relevant position of fluid cooling, the fluid after the heating flows into the stabilizer of lower part in, exchanges the sea water of frame surface with heat, spouts to stator winding tip and rotor tip in through the pump package suction shower head through the pump package, inside self-loopa and the self-cooling oil duct of having formed, do not need extra cooler and external interface, improved the cooling effect, reduced the volume weight of motor, promoted holistic efficiency.
Drawings
Fig. 1 is a general structural view of a first embodiment of the present invention;
fig. 2 is a schematic diagram of oil circulation according to a first embodiment of the present invention.
The reference numerals are as follows: 1-stand, 21-iron core, 23-end winding, 3-rotor, 31-rotor shaft, 4-spray cooling system, 41-pump group, 42-connecting pipeline, 43-spray header, 44-liquid level meter, 45-mounting rack, 46-filter, 47-oil pump mounting seat, 48-oil injection device oil inlet, 5-stabilizer fin.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the various components in the figures are drawn to a particular scale, these scale relationships are merely exemplary and may be adjusted as needed by one skilled in the art to suit a particular application.
It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured or operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be connected inside two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, the cooling structure of the nacelle propulsion motor disclosed by the invention comprises a stand 1, a stabilizer fin 5 connected to the lower part of the stand 1, and a stator and a rotor 3 arranged in the stand 1, wherein the unit consists of a stand frame and a stand internal pipeline, the stator consists of an iron core 21, a linear section winding and an end winding 23, and the rotor 3 consists of a rotor shaft 31, a rotor yoke and a rotor permanent magnet magnetic pole; the inner part of the machine base 1 is provided with a spray cooling system 4 consisting of a pump group 41, a connecting pipeline 42 and a spray header 43 at the end winding 23, the inside of the stabilizer 5 is provided with an oil storage bin communicated with the machine base 1 as an oil storage and cooling space, the spray header 43 arranged near the end winding 23 sprays oil to directly cool the relevant areas of the stator and the rotor 3, heated oil falls into the oil storage bin of the stabilizer 5 at the lower part of the machine base 1 to exchange heat to the outer surface of the machine base 1 to be cooled by external seawater, and then the heated oil is pumped back to the spray cooling system 4 by the pump group 41 and sprayed out of the spray header 43 to form an internal self-circulation cooling system. The heat of the stator linear segment winding is radiated to the sea water through the outer surface of the machine base, meanwhile, a certain liquid level height can be kept in the machine base, the magnetic poles on the surface of the rotor can be cooled, the liquid level height can be freely adjusted according to the needs by adjusting the rotating speed of the pump set according to the signal feedback of the set liquid level height meter.
The base 1 is internally provided with a clearance channel positioned at the lower part of the iron core 21 to form an oil duct, oil which is convenient to flow back to an oil storage bin and is introduced into the pump group 41 through a pipeline from an oil inlet 48 of an oil injection device, and the pipeline arranged in the stabilizer 5 enables the pump group 41 to enter the spray header 43 for spraying after absorbing oil from the stabilizer 5 through the pipeline, so as to cool a corresponding area.
The machine base 1 is also provided with a liquid level meter 44, and the pump set 41 adjusts the rotating speed of the pump set 41 according to the feedback signal of the liquid level meter 44 to freely adjust the liquid level height according to the requirement. Ensuring that the liquid level in the lower part of the housing 1 is maintained at a certain level to cool the outer surface of the rotor 3 and the stator part immersed therein. The oil level at the bottom of the stand 1 can be specifically designed according to the requirement, and is generally arranged at the high point of the outer surface of the immersed pump set 41 or the outer surface of the rotor 3, and the oil level can be lowered or raised according to the requirement, and the liquid level height can be freely adjusted by arranging a liquid level meter 44 and then controlling the rotating speed of the pump set 41 according to the requirement through a feedback signal of the liquid level meter.
The shower heads 43 have a plurality of groups and are supported by a mounting frame 45, facing the end windings 23, the rotor 3 and the pump stack 41, respectively. The cooling pump stack 41 may be sprayed through a dedicated one-way conduit. The spray header 43 may spray the stator and rotor end windings 23 as needed, or may spray only a part of the area. The oil flows back to the lower part of the stand 1 after being sprayed out, and the oil can flow back to the stabilizer fins at the lower part by arranging a clearance runner at the lower part of the stand 1 or between the lower part of the stand 1 and the iron core 21.
The stabilizer 5 and the stand 1 can be connected through bolts or welding, so that the stabilizer 5 is fixed on the stand 1. The inner space of the stabilizer 5 is used as a storage and cooling space of oil; the oil in the stabilizer 5 may radiate heat into the sea through its surface.
The filter 46 can be arranged at the inlet of the pump set 41 according to the requirement, and the pump set 41 is arranged at the position close to the end cover of the machine base 1 through the oil pump mounting seat 47 as much as possible, so that the replacement and maintenance of the pump set 41 and the filter 46 thereof can be realized through correspondingly arranging a maintenance window on the end cover.
This patent is through novel cooling structure, make full use of nacelle propeller's stabilizer structure, solves the not good refrigerated problem in local position of propulsion motor, and inside realization cold and hot self-loopa simultaneously does not need external interface, has reduced the volume weight of motor simultaneously, has improved nacelle propeller's overall efficiency.
The stabilizer can axially move to the end pump group according to the overall arrangement, and the oil circuit connection of the pump group and the stabilizer is simpler and more convenient.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and some practical embodiments, and variations and modifications may be made by those skilled in the art without departing from the inventive concept, which are all within the scope of the present invention.
Claims (7)
1. The cooling structure of the nacelle propulsion motor comprises a machine base (1), a stabilizer fin (5) connected to the lower part of the machine base (1), and a stator and a rotor (3) which are arranged in the machine base (1), wherein the stator consists of an iron core (21), a straight-line section winding and an end winding (23), and the rotor (3) consists of a rotor shaft (31), a rotor yoke part and a rotor permanent magnet magnetic pole; the method is characterized in that: the automatic cooling device is characterized in that a spray cooling system (4) consisting of a pump group (41), a connecting pipeline (42) and a spray header (43) is arranged at an end winding (23) in the machine base (1), an oil storage bin communicated with the machine base (1) is arranged inside the stabilizer fin (5), the spray header (43) sprays oil to directly cool the end parts of the stator and the rotor (3), heated oil falls into the oil storage bin of the stabilizer fin (5) and is cooled by outside seawater, and then is pumped back to the spray cooling system (4) by the pump group (41), and is sprayed out through the spray header (43) to form internal self-circulation cooling.
2. A nacelle propulsion motor cooling structure according to claim 1, characterized in that the housing (1) is provided with an oil channel in the lower part of the core (21), and that the oil flowing back to the oil reservoir is led into the pump unit (41) through the oil inlet (48) of the oil injection device.
3. A nacelle propulsion motor cooling structure according to claim 1, characterized in that the foundation (1) is further provided with a level gauge (44), the pump unit (41) adjusting the rotational speed to adjust the level according to the feedback signal of the level gauge (44).
4. A nacelle propulsion motor cooling structure according to claim 1 or 2 or 3, characterized in that the shower heads (43) have a plurality of groups, each towards the end winding (23), the rotor (3) and the pump stack (41).
5. A nacelle propulsion motor cooling structure according to claim 4, characterized in that the stabilizer fin (5) is bolted or welded to the frame (1).
6. A nacelle propulsion motor cooling structure according to claim 5, characterized in that a filter (46) is arranged at the inlet of the pump stack (41).
7. A nacelle propulsion motor cooling structure according to claim 6, characterized in that the pump group (41) is arranged close to the end cover of the machine base (1) by means of an oil pump mounting (47), on which end cover a service window is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410003992.7A CN117767664A (en) | 2024-01-03 | 2024-01-03 | Nacelle propulsion motor cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410003992.7A CN117767664A (en) | 2024-01-03 | 2024-01-03 | Nacelle propulsion motor cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117767664A true CN117767664A (en) | 2024-03-26 |
Family
ID=90316510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410003992.7A Pending CN117767664A (en) | 2024-01-03 | 2024-01-03 | Nacelle propulsion motor cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117767664A (en) |
-
2024
- 2024-01-03 CN CN202410003992.7A patent/CN117767664A/en active Pending
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