CN115384739B - Low temperature rise underwater propeller - Google Patents
Low temperature rise underwater propeller Download PDFInfo
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- CN115384739B CN115384739B CN202211083855.6A CN202211083855A CN115384739B CN 115384739 B CN115384739 B CN 115384739B CN 202211083855 A CN202211083855 A CN 202211083855A CN 115384739 B CN115384739 B CN 115384739B
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- heat dissipation
- rotor
- gap
- propeller
- stator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
Abstract
The invention discloses a low-temperature-rise underwater propeller which comprises a guide pipe, a permanent magnet motor, a rim block and a propeller, wherein the permanent magnet motor, the rim block and the propeller are positioned in the guide pipe; the rim block is connected with the rotor, a second gap is formed between the rim block and the inner wall of the guide pipe, and the second gap is communicated with the first gap to form a gap runner which wraps the end part and the outer side surface of the stator and is used for flowing cooling liquid; the propeller is located inside the rotor and is connected to the rotor. The invention can greatly reduce the overall temperature of the motor, balance the overall temperature of the propeller, improve the overall reliability of the underwater propeller, and can produce better expected effects on high-power civil ships and military ships.
Description
Technical Field
The invention relates to the technical field of ships and ocean engineering, in particular to a low-temperature-rise underwater propeller.
Background
With the rapid development of marine ship technology, electric power technology and water trade, the requirements of ships on propulsion devices are increasing. The traditional shafting system has large noise, large energy loss and large occupied space, and can not meet the current underwater propulsion requirement. The problem is well solved by the advent of the underwater propeller, and the underwater propeller can enable a motor to directly drive a blade to rotate as a novel propeller.
The underwater propeller has the advantages of high power density, high propulsion efficiency, high maneuverability and the like. But the propeller conduit has limited internal space, small motor volume and high loss density, and the stator sheath has the problems of high eddy current loss and low heat conductivity coefficient, so that the temperature of the propeller motor is higher. Because stator and rotor gap watershed mainly passes through the effective iron core part, heat at the winding end is not easy to dissipate, so that the whole temperature of the propeller is uneven in distribution, and the phenomenon of thermal expansion and cold contraction is very easy to occur; in addition, in some occasions with high noise requirements, heat insulation acoustic stealth materials and the like are additionally arranged on the outer surface of the stator, so that the heat dissipation of the propeller through the shell is difficult, the overall reliability of the underwater propeller is reduced, and the comprehensive performance of the underwater propeller is influenced. For example, CN205652318U and CN213109744U only consider that the water flow in the gap flows through the effective core portion, but do not consider the problem of too high temperature at the end of the propeller motor, and patent CN112849383a uses lubricating liquid to cool the motor, but has the problems of complex structure seal, easy liquid leakage and the like.
Therefore, how to reduce the temperature of the end part of the propeller motor and balance the overall temperature of the propeller becomes a problem to be solved.
Disclosure of Invention
The invention mainly aims to provide a low-temperature-rise underwater propeller capable of balancing the overall temperature of the propeller, so that the defects of the prior art are overcome.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention comprises the following steps: a low temperature rise underwater propeller comprising:
a conduit;
the permanent magnet motor is positioned in the guide pipe and comprises a stator and a rotor, wherein the rotor is positioned in the stator and forms a first gap with the stator;
the rim block is positioned in the guide pipe, is positioned at two sides of the end part of the rotor and is connected with the rotor, a second gap is formed between the rim block and the inner wall of the guide pipe, and the second gap is communicated with the first gap to form a gap runner which wraps the end part and the outer side surface of the stator and is used for flowing cooling liquid;
the propeller is positioned inside the rotor and connected with the rotor;
the stator is powered on and then drives the rotor to rotate, the rotor drives the rim block and the propeller to rotate, the inlet and the outlet of the clearance flow channel form pressure difference under the rotation of the propeller, and the cooling liquid flows in the clearance flow channel under the action of the pressure difference to carry out integral heat dissipation on the end part and the outer side surface of the stator.
In a preferred embodiment, the propeller further comprises:
the lubricating bearing comprises a lubricating axial bearing and a lubricating radial bearing, the lubricating axial bearing and the lubricating radial bearing are both fixed in the inner wall of the guide pipe and are respectively positioned at the side and the upper side of the rim block, and at least one part of the second gap is formed between the side edge of the rim block and the lubricating axial bearing, between the upper end face of the rim block and the lubricating radial bearing.
In a preferred embodiment, the propeller further comprises:
and the heat dissipation rings are arranged on the front side and the rear side of the stator, and another part of the second gap is formed between the heat dissipation rings and the rim block.
In a preferred embodiment, at least one heat dissipation groove is formed on the outer wall surface of the heat dissipation ring, which is in contact with the second gap.
In a preferred embodiment, the heat dissipation grooves are a plurality of annular grooves which are arranged concentrically, each heat dissipation groove is formed by axially recessing the outer wall surface of the heat dissipation ring, which is in contact with the second gap, and the plurality of heat dissipation grooves are distributed at intervals along the radial direction on the outer wall surface of the heat dissipation ring, which is in contact with the second gap.
In a preferred embodiment, the heat dissipation grooves are a plurality of grooves circumferentially distributed on the inner wall surface of the heat dissipation ring at intervals, each heat dissipation groove extends axially on the inner wall surface of the heat dissipation ring, each heat dissipation groove is inclined outwards from the inner wall surface of the heat dissipation ring and is recessed, and the inclination direction of the heat dissipation grooves is opposite to the rotation direction of the rim block.
In a preferred embodiment, the stator comprises a stator core and a stator winding wound on the stator core; the rotor comprises a permanent magnet and a rotor ring, wherein the permanent magnet is embedded on the rotor ring, and the rim block is connected with the rotor ring.
In a preferred embodiment, the inner surface of the stator and the outer surface of the rotor are respectively wrapped with a waterproof sheath, and the waterproof sheath is made of a waterproof and corrosion-resistant composite material.
In a preferred embodiment, the propeller comprises a plurality of separate blades, each of which is detachably mounted on an inner wall surface of the rotor ring.
In a preferred embodiment, the side wall surfaces of the lubricating axial bearing and the lubricating radial bearing, which are in contact with the second gap, are provided with micro grooves.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a novel gap flow passage structure form, gap water flows through the end part of a motor of a propeller and surrounds the periphery of a motor stator assembly, water pressure difference formed by a propeller at a gap inlet and a gap outlet is utilized to form circulation in a designed gap flow passage, so that the motor and a lubricating bearing are forcedly cooled, the whole structure is simple, the cooling performance of the motor is excellent, and the problems of large temperature rise of the motor of the high-power propeller and uneven whole temperature distribution of the propeller in the prior art are solved. The novel gap underwater propeller can produce better expected effect on high-power civil ships and military ships.
2. According to the invention, the heat dissipation groove is formed on the outer wall surface, which is close to the end part of the motor and is in contact with water flow, of the heat dissipation ring, so that the contact area between the heat dissipation ring and the water flow is increased, the flow speed of the water flow in the gap flow channel is accelerated, the heat dissipation of the end part of the motor is accelerated, and impurities in the water flow in the gap flow channel are cleaned.
3. According to the invention, the sealing protective sheath of the motor stator and the motor rotor is made of a composite material with water resistance, light weight, high strength, good insulativity and corrosion resistance, so that sheath vortex is greatly reduced, the overall temperature of the motor can be greatly reduced, the overall temperature of the propeller is balanced, and the overall reliability of the underwater propeller is improved.
4. The invention organically combines the permanent magnet motor, the propeller and the guide pipe to form a modularized unit, and the propeller is processed in a modularized block mode by taking each blade as a manufacturing unit, and is assembled on the rotor ring one by one during assembly.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic cross-sectional view of a low temperature rise underwater propulsion device in accordance with an exemplary embodiment of the present invention;
FIG. 2 is a front axial side view of a low temperature rise underwater propeller in an exemplary embodiment of the present invention;
FIG. 3 is a front axial side cross-sectional view of a low temperature rise underwater propeller in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic view of a partial enlarged structure at k of FIG. 1;
FIG. 5a is a schematic view of a heat dissipation groove on an inner wall surface of a heat dissipation ring according to a first embodiment of the present invention;
FIG. 5b is a schematic cross-sectional view of FIG. 5a in the direction A-A;
FIG. 6a is a schematic structural diagram of a heat dissipation groove on an inner wall surface of a heat dissipation ring according to a second embodiment of the present invention;
FIG. 6B is a schematic cross-sectional view of FIG. 6a in the direction B-B;
FIG. 7a is a schematic illustration of a lubrication axial bearing with micro-grooves;
fig. 7b is a schematic view of a lubrication radial bearing with micro grooves.
Reference numerals:
1. the cooling device comprises a front end cover, a 2-front bearing gasket, a 3-front lubrication axial bearing, a 4-front lubrication radial bearing, a 5-front heat dissipation ring, a 511-grooved wall surface, a 512-annular groove, a 521-grooved wall surface, a 522-inclined groove, a 6-stator winding, a 7-stator waterproof jacket, an 8-rear heat dissipation ring, a 9-rear bearing gasket, a 10-rear lubrication axial bearing, a 11-rear axial bearing baffle, a 12-rear end cover, a 13-rear guide cover, a 14-rear rim block, a 15-rotor ring, a 16-propeller, a 17-permanent magnet, a 18-rotor waterproof jacket, a 19-front rim block, a 20-front axial bearing baffle, a 21-front guide cover, a 22-conduit body, a 23-front radial bearing baffle, a 24-rear radial bearing baffle, a 25-rear lubrication radial bearing, a 26, a first gap, 27, a second gap, 28, a stator core 29, a stator and a 30 cooling fluid flowing direction.
The invention will be more fully understood from the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed embodiment.
The invention discloses a low-temperature-rise underwater propeller, which provides a novel gap flow passage structure form, gap water flows through the end part of a propeller motor and surrounds the periphery of a motor stator assembly, and circulation is formed in a designed gap flow passage by utilizing water pressure difference formed by a propeller at a gap inlet and a gap outlet so as to forcedly cool the motor and lubricate a bearing.
Referring to fig. 1 to 4, the low temperature rise underwater propeller disclosed by the embodiment of the invention comprises a conduit, a permanent magnet motor, a rim block, a propeller, a heat dissipation ring and a lubrication bearing, wherein the permanent magnet motor, the rim block, the propeller, the heat dissipation ring and the lubrication bearing are positioned in the conduit, the conduit comprises a conduit body 22, a front end cover 1, a rear end cover 12, a front guide cover 21 and a rear guide cover 13, the front end cover 1 and the rear end cover 12 are respectively positioned at the front end and the rear end of the conduit body 22, and the front guide cover 21 and the rear guide cover 13 are respectively positioned at the front end of the front end cover 1 and the rear end of the rear end cover 12.
The permanent magnet motor specifically comprises a stator 29 and a rotor, in this embodiment, the stator 29 is mounted on the inner wall surface of the catheter body 22 and is coaxially arranged with the catheter body 22, and specifically comprises a stator core 28, a stator winding 6 and a stator waterproof sheath 7, wherein the stator winding is wound on the stator core, and the stator waterproof sheath 7 is wrapped on the inner surface of the stator 29. The rotor is entirely located inside the stator 29 and is also coaxially arranged with the catheter body 22. Preferably, a first gap 26 through which the cooling liquid flows is formed between the rotor and the stator 29 for radiating heat from the outer side surface of the stator 29. In this embodiment, the rotor specifically includes a permanent magnet 17, a rotor ring 15, and a rotor waterproof jacket 18, where the permanent magnet 17 is embedded on the rotor ring 15, and the rotor waterproof jacket 18 is wrapped on the outer surface of the rotor ring 15.
Preferably, the stator waterproof sheath 7 and the rotor waterproof sheath 18 are made of waterproof, light-weight, strong and corrosion-resistant composite materials, so that sheath vortex can be greatly reduced, and the overall heating of the propeller is reduced.
The heat dissipation rings are disposed on the front and rear sides of the stator for dissipating heat from the ends of the two sides of the stator 29, and for convenience of description, the front and rear sides of the stator are defined as the front heat dissipation ring 5 and the rear heat dissipation ring 8, respectively.
The rim pieces are located on both sides of the end of the rotor and are connected to the rotor ring 15, in particular in this embodiment the rim pieces are connected to the rotor ring 15 in particular in a lap joint. And in this embodiment the radial cross section of the rim piece is approximately L-shaped. For convenience of description, rim blocks defining both front and rear sides of the rotor are a front rim block 19 and a rear rim block 14, respectively, wherein the front rim block 19 is overlapped with the front end of the rotor ring 15 in particular, and the rear rim block 14 is overlapped with the rear end of the rotor ring 15 in particular.
The lubrication bearing specifically comprises a lubrication axial bearing and a lubrication radial bearing, wherein the lubrication axial bearing comprises a front lubrication axial bearing 3 and a rear lubrication axial bearing 10, the front lubrication axial bearing 3 is mounted on a front axial bearing baffle 20 and positioned in front of a front rim block 19, the rear lubrication axial bearing 10 is mounted on a rear axial bearing baffle 11 and positioned behind a rear rim block 14, the front axial bearing baffle 20 is fixed on the inner side surface of the front end cover 1, and the rear axial bearing baffle 11 is mounted on the inner side surface of the rear end cover 12; the lubricated radial bearings include a front lubricated radial bearing 4 and a rear lubricated radial bearing 25, the front lubricated radial bearing 4 being mounted on a front radial bearing shield 23 above the front side of the front rim block 19, the rear lubricated radial bearing 25 being mounted on a rear radial bearing shield 24 above the rear side of the rear rim block 14, the front radial bearing shield 23 being fixed to the inner side of the duct body 22, and the rear radial bearing shield 24 being mounted on the inner side of the duct body 22. And preferably, a second gap 27 is formed between the side edge of the front rim block 19 and the front lubrication axial bearing 2, between the upper end face of the front rim block 19 and the front lubrication radial bearing 4, between the front rim block 19 and the front heat dissipation ring 5, and between the side edge of the rear rim block 14 and the rear lubrication axial bearing 10, between the upper end face of the rear rim block 14 and the rear lubrication radial bearing 25, and between the rear rim block 14 and the rear heat dissipation ring 8, and the second gap 27 is communicated with the first gap 26 to form a gap flow channel which wraps the end and the outer side surface of the stator 29, in this embodiment, the gap flow channel is approximately in a ring shape of a concave shape surrounding the stator, and cooling liquid (such as cooling water) flows in the gap flow channel through the end and the outer side surface of the stator 29. Compared with the existing method that only the first gap 26 is arranged, the novel gap runner structure is designed to cool the end part and the outer side face of the stator 29, so that the overall temperature of the propeller is balanced, the problem that the temperature rise of the end part of the motor of the underwater propeller is too high is effectively solved, and the novel underwater propeller is suitable for high-power ship propulsion. In addition, the front lubrication axial bearing 3 and the front lubrication radial bearing 4 are further provided with a front bearing washer 2, and the rear lubrication axial bearing 10 and the rear lubrication radial bearing 25 are further provided with a rear bearing washer 9.
More preferably, the side wall surfaces of the lubrication axial bearing (including the front lubrication axial bearing 3 and the rear lubrication axial bearing 4) contacting the second gap 27 and the side wall surfaces of the lubrication radial bearing (including the front lubrication radial bearing 4 and the rear lubrication radial bearing 25) contacting the second gap 27 are all provided with micro grooves 30. As shown in fig. 7a and 7b, at least one micro groove 30 of the lubricated axial bearing and the lubricated radial bearing is uniformly arranged on the contact surface of the bearing and the second gap.
Preferably, at least one heat dissipation groove is formed on the outer wall surface of the heat dissipation ring, which is in contact with the second gap 27. The heat dissipation grooves are formed by axially recessing the outer wall surface 511 of the heat dissipation ring, which is in contact with the second gap, and the plurality of heat dissipation grooves are distributed on the outer wall surface of the heat dissipation ring, which is in contact with the second gap 27, at a certain distance in the radial direction. As shown in fig. 6a and 6b, one way is to open an inclined groove 522 on an outer wall surface 521 of the heat dissipation ring, which is in contact with the second gap 27, specifically, the heat dissipation grooves are a plurality of grooves distributed on an inner wall surface of the heat dissipation ring at certain intervals along a circumferential direction, each heat dissipation groove extends on the inner wall surface of the heat dissipation ring along an axial direction, each heat dissipation groove is concavely arranged from the inner wall surface of the heat dissipation ring in an outward inclined manner, and the inclination direction of the heat dissipation groove is opposite to the rotation direction of the corresponding rim block, so that the inclination direction of the heat dissipation groove is the same as the water flow direction, and the shape of the heat dissipation groove is a rectangular or arc narrow groove. According to the embodiment of the invention, the annular concave-shaped clearance water channel reasonably wrapping the motor stator is designed, and the heat radiation grooves are formed in the inner wall of the heat radiation ring, so that the heat generated in the stator 6 can be greatly taken away.
The propeller 16 is located inside the rotor and is connected to the rotor ring 15 of the rotor. Specifically, in the present embodiment, the propeller 16 includes a plurality of divided blades, each of which is detachably mounted on the inner wall surface of the rotor ring 15, i.e., the propeller 16 is manufactured in a modular block form in a unit of manufacture per blade, and is assembled to the rotor ring 15 one by one.
The invention has the following advantages: 1. the invention provides a novel gap flow passage structure form, gap water flows through the end part of a motor of a propeller and surrounds the periphery of a motor stator assembly, water pressure difference formed by a propeller at a gap inlet and a gap outlet is utilized to form circulation in a designed gap flow passage, so that the motor and a lubricating bearing are forcedly cooled, the whole structure is simple, the cooling performance of the motor is excellent, and the problems of large temperature rise of the motor of the high-power propeller and uneven whole temperature distribution of the propeller in the prior art are solved. The novel gap underwater propeller can produce better expected effect on high-power civil ships and military ships. 2. According to the invention, the heat dissipation groove is formed on the outer wall surface, which is close to the end part of the motor and is in contact with water flow, of the heat dissipation ring, so that the contact area between the heat dissipation ring and the water flow is increased, the flow speed of the water flow in the gap flow channel is accelerated, the heat dissipation of the end part of the motor is accelerated, and impurities in the water flow in the gap flow channel are cleaned. 3. According to the invention, the sealing protective sheath of the motor stator and the motor rotor is made of a composite material with water resistance, light weight, high strength, good insulativity and corrosion resistance, so that sheath vortex is greatly reduced, the overall temperature of the motor can be greatly reduced, the overall temperature of the propeller is balanced, and the overall reliability of the underwater propeller is improved. 4. The invention organically combines the permanent magnet motor, the propeller and the guide pipe to form a modularized unit, and the propeller is processed in a modularized block mode by taking each blade as a manufacturing unit, and is assembled on the rotor ring one by one during assembly.
The various aspects, embodiments, features and examples of the invention are to be considered in all respects as illustrative and not intended to limit the invention, the scope of which is defined solely by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
The use of headings and chapters in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the present invention.
Claims (8)
1. A low temperature rise underwater propeller, characterized in that the low temperature rise underwater propeller comprises:
a conduit;
the permanent magnet motor is positioned in the guide pipe and comprises a stator and a rotor, wherein the rotor is positioned in the stator and forms a first gap with the stator;
the rim block is positioned in the guide pipe, is positioned at two sides of the end part of the rotor and is connected with the rotor, a second gap is formed between the rim block and the inner wall of the guide pipe, and the second gap is communicated with the first gap to form an annular concave gap runner which wraps the end part and the outer side surface of the stator and is used for cooling liquid to flow;
the propeller is positioned inside the rotor and connected with the rotor;
the lubricating bearing comprises a lubricating axial bearing and a lubricating radial bearing, the lubricating axial bearing and the lubricating radial bearing are both fixed in the inner wall of the guide pipe and are respectively positioned at the side and the upper side of the rim block, and at least one part of the second gap is formed between the side edge of the rim block and the lubricating axial bearing and between the upper end surface of the rim block and the lubricating radial bearing;
the heat dissipation rings are arranged on the front side and the rear side of the stator, and another part of the second gap is formed between the heat dissipation rings and the rim block;
the stator drives the rotor to rotate after being electrified, the rotor drives the rim block and the propeller to rotate, the inlet and the outlet of the clearance flow channel form pressure difference under the rotation of the propeller, and the cooling liquid forms circulation in the clearance flow channel under the action of the pressure difference to carry out integral heat dissipation on the end part and the outer side surface of the stator.
2. The low temperature rise underwater propeller of claim 1 wherein the outer wall surface of the heat dissipation ring in contact with the second gap is provided with at least one heat dissipation groove.
3. The low temperature rise underwater propeller of claim 2 wherein the heat dissipation grooves are a plurality of concentric annular grooves, each heat dissipation groove is formed by axially recessing an outer wall surface of the heat dissipation ring in contact with the second gap, and the plurality of heat dissipation grooves are radially spaced apart on the outer wall surface of the heat dissipation ring in contact with the second gap.
4. The low temperature rise underwater propeller of claim 2 wherein the heat dissipation grooves are a plurality of grooves circumferentially spaced apart on the inner wall surface of the heat dissipation ring, each of the heat dissipation grooves extends axially on the inner wall surface of the heat dissipation ring, each of the heat dissipation grooves is inclined and recessed outwardly from the inner wall surface of the heat dissipation ring, and the inclination direction of the heat dissipation grooves is opposite to the rotation direction of the rim block.
5. The low temperature-rise underwater propulsor of claim 1 wherein said stator comprises a stator core and stator windings wound on said stator core; the rotor comprises a permanent magnet and a rotor ring, wherein the permanent magnet is embedded on the rotor ring, and the rim block is connected with the rotor ring.
6. The low temperature-rise underwater propeller of claim 5 wherein the inner surface of the stator and the outer surface of the rotor are each wrapped with a waterproof jacket, the waterproof jacket being a waterproof and corrosion resistant composite material.
7. The low temperature-rise underwater propulsor of claim 5 wherein said propeller comprises a plurality of separate paddles, each of said paddles being removably mounted to an inner wall surface of said rotor ring.
8. The low temperature rise underwater propeller of claim 1 wherein the lubricated axial bearing and the lubricated radial bearing are formed with micro grooves in the side wall surfaces in contact with the second gap.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211083855.6A CN115384739B (en) | 2022-09-06 | 2022-09-06 | Low temperature rise underwater propeller |
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| CN202211083855.6A CN115384739B (en) | 2022-09-06 | 2022-09-06 | Low temperature rise underwater propeller |
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| CN115384739A CN115384739A (en) | 2022-11-25 |
| CN115384739B true CN115384739B (en) | 2023-05-16 |
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| CN116215823B (en) * | 2023-03-22 | 2023-08-18 | 中国科学院宁波材料技术与工程研究所 | Conduit type deep sea propeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6837757B2 (en) * | 2002-04-16 | 2005-01-04 | Electric Boat Corporation | Rim-driven propulsion pod arrangement |
| DE102005044327B4 (en) * | 2005-09-16 | 2008-04-17 | Siemens Ag | Electric machine with permanent magnets |
| JP5432606B2 (en) * | 2009-06-25 | 2014-03-05 | 川崎重工業株式会社 | Thrust generator |
| EP2808247B1 (en) * | 2013-05-29 | 2019-01-02 | ABB Schweiz AG | A propulsion unit with electric motor, whereby the stator is arranged in a ring around the propeller |
| CN104333172A (en) * | 2014-10-18 | 2015-02-04 | 无锡德林船舶设备有限公司 | Ship-used permanent magnet motor propeller |
| EP3612444A4 (en) * | 2017-04-18 | 2020-11-25 | ABB Oy | A propulsion unit |
| CN107786032B (en) * | 2017-11-03 | 2019-12-17 | 合肥倍豪海洋装备技术有限公司 | Magnetic bearing device applied to ship shaftless propeller |
| CN108506144A (en) * | 2018-05-24 | 2018-09-07 | 浙江海洋大学 | A kind of shaftless propulsion system for ship |
| CN110397602A (en) * | 2019-06-27 | 2019-11-01 | 中国船舶重工集团公司第七一九研究所 | A kind of integrated pipeline pump |
| CN112478118A (en) * | 2020-11-18 | 2021-03-12 | 四川宏华电气有限责任公司 | Pod type shaftless rim drive integrated motor propeller |
| CN114524074A (en) * | 2022-02-15 | 2022-05-24 | 武汉理工大学 | Rim-driven propeller of magnetic suspension permanent magnet motor |
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