CN111846174B - Low-loss underwater rim propulsion device - Google Patents
Low-loss underwater rim propulsion device Download PDFInfo
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- CN111846174B CN111846174B CN202010743866.7A CN202010743866A CN111846174B CN 111846174 B CN111846174 B CN 111846174B CN 202010743866 A CN202010743866 A CN 202010743866A CN 111846174 B CN111846174 B CN 111846174B
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- air guide
- guide sleeve
- wheel rim
- wall surface
- rim
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
- B63H5/15—Nozzles, e.g. Kort-type
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a low-loss underwater wheel rim propelling device, which comprises a front flow guide cover and a rear flow guide cover which are oppositely arranged and are of annular structures, wherein the front flow guide cover and the rear flow guide cover are arranged at intervals along the axial direction, a wheel rim is installed between the front flow guide cover and the rear flow guide cover in a rotating mode, a permanent magnet is embedded in the middle of the outer wall surface of the wheel rim along the circumferential direction, a sealing plate is installed between the front flow guide cover and the rear flow guide cover which are positioned on the outer side of the circumference of the wheel rim, and a gap exists between the inner wall surface of the sealing plate and the outer wall surface of the wheel rim; the front and rear air guide sleeves are provided with a plurality of through vent holes, one end of each vent hole is communicated with a gap between the sealing plate and the wheel rim, and the other end of each vent hole is communicated with an external inflating device; a stator seat is sleeved outside the circumference of the sealing plate, a winding is wound on the inner wall surface of the stator seat, and a shell is also arranged between the front air guide sleeve and the rear air guide sleeve which are positioned on the outer wall of the circumference of the stator seat; according to the bubble drag reduction principle, a large number of bubbles are formed in the gap during working, so that the motor is cooled, the water friction loss is reduced, and the efficiency of the propulsion device is greatly improved.
Description
Technical Field
The invention relates to the technical field of underwater propellers, in particular to a low-loss underwater rim propulsion device.
Background
The integrated electric rim driving propeller is a highly integrated modularized propeller, and has great potential in the aspects of noise reduction and synergy, the integrated electric rim driving propeller structurally cancels a driving shafting and a motor bag, so that the loss of shafting transmission and the resistance brought by the motor bag are avoided, but a gap exists between a rotor rim and a stator, seawater is filled in the gap during working, water friction loss is generated between a rotating rim and a wall surface of a propeller, meanwhile, the pressure difference existing in a front gap port and a rear gap port can drive generation gap fluid flow, and the gap flow can increase the water friction loss of the rim gap while cooling the motor stator.
The rim size of a high-power rim driving motor is often larger, the water friction loss in a gap area is increased along with the increase of the rim size and the increase of the motor rotating speed, so that the water friction loss energy accounts for more than 20% of the motor power, and the loss is extremely large.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a low-loss underwater rim propulsion device with a reasonable structure, a large number of bubbles are generated in gaps through ventilation of vent holes, the water friction loss is effectively reduced while the motor is cooled, and the propulsion efficiency is greatly improved.
The technical scheme adopted by the invention is as follows:
a low-loss underwater rim propulsion device comprises a front fairing and a rear fairing which are oppositely arranged, wherein the front fairing and the rear fairing are both of annular structures and are arranged at intervals along the axial direction; a flange is rotatably mounted between the front air guide sleeve and the rear air guide sleeve together, a permanent magnet is embedded in the middle of the outer wall surface of the flange along the circumferential direction, a sealing plate is mounted between the front air guide sleeve and the rear air guide sleeve which are positioned on the outer side of the circumference of the flange, and a gap is formed between the inner wall surface of the sealing plate and the outer wall surface of the flange; the front air guide sleeve and the rear air guide sleeve are both provided with a plurality of through vent holes along the circumferential direction, one end of each vent hole is communicated with a gap between the sealing plate and the wheel rim, and the other end of each vent hole is communicated with an external inflating device; the stator seat is sleeved outside the circumference of the sealing plate, a winding is wound on the inner wall surface of the stator seat, and a shell is further arranged between the front air guide sleeve and the rear air guide sleeve which are positioned on the circumferential outer wall of the stator seat.
As a further improvement of the above technical solution:
the vent holes on the front air guide sleeve are ventilated, or the vent holes on the rear air guide sleeve are ventilated.
The front air guide sleeve and the rear air guide sleeve are identical in structure, and the structure of the front air guide sleeve is as follows: the spherical cover comprises an annular cover body, wherein the outer wall surface of the annular cover body is connected with the end surface of the outer end to form a spherical structure; the outer edge of the inner end of the annular cover body is sequentially provided with an outer step I and an outer step II along the circumferential direction, and the inner edge of the inner end of the annular cover body is sequentially provided with an inner step I and an inner step II along the circumferential direction; and an orifice at one end of the vent hole is positioned on the inner end surface of the annular cover body, and an orifice at the other end of the vent hole is positioned on the spherical structure.
The inner wall surface of the stator seat is uniformly extended with a plurality of winding piles along the circumferential direction, the single winding pile is arranged along the axial direction of the stator seat, the section of the single winding pile is of a T-shaped structure, two lower bottom surfaces of the single winding pile horizontal arm are both inclined plane structures inclined towards the vertical arm, and a group of windings are wound on the single winding pile.
The permanent magnets comprise N poles and S poles, the single permanent magnets are embedded on the outer wall surface of the wheel rim along the axial direction of the wheel rim, and the N poles and the S poles are arranged at intervals.
The front air guide sleeve is rotationally connected with the wheel rim through a bearing I, and the rear air guide sleeve is rotationally connected with the wheel rim through a bearing II; the bearing I and the bearing II are both water lubrication bearings, and a moving ring of the bearing I and a moving ring and a wheel rim of the bearing II are fixedly installed.
Two ends of the sealing plate are fixedly sealed with the front air guide sleeve and the rear air guide sleeve respectively; two ends of the shell are respectively and fixedly sealed with the front air guide sleeve and the rear air guide sleeve.
An inner ring is embedded on the inner wall surface of the wheel rim along the circumferential direction, and a plurality of paddles are uniformly and fixedly arranged on the inner wall surface of the inner ring along the circumferential direction.
The invention has the following beneficial effects:
the invention has compact and reasonable structure and convenient operation, a plurality of vent holes communicated with the gaps between the sealing plate and the wheel rim are arranged on the front flow guide sleeve and the rear flow guide sleeve along the circumferential direction, the gaps are inflated through the vent holes to form a large amount of bubbles under the action of an external inflating device to form gas-liquid two-phase flow, and the water friction in the gaps is reduced through the existence of the bubbles, thereby effectively reducing the water friction loss and greatly improving the propelling efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is an exploded view of fig. 1.
Fig. 4 is a schematic structural view of a front fairing of the present invention.
Fig. 5 is a schematic view of the mounting between the stator holder and the winding according to the invention.
Wherein: 1. a front air deflector; 2. a first bearing; 3. a housing; 4. a stator base; 5. a winding; 6. a sealing plate; 7. a paddle; 8. a permanent magnet; 9. a rim; 10. a second bearing; 11. a rear dome; 12. a vent hole; 101. an annular cover body; 102. a first outer step; 103. a second outer step; 104. a first inner step; 105. a second inner step; 41. pile winding; 71. an inner ring.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, 2 and 3, the low-loss underwater rim propulsion device of the embodiment comprises a front fairing 1 and a rear fairing 11 which are oppositely arranged, wherein the front fairing 1 and the rear fairing 11 are both annular structures, and the front fairing 1 and the rear fairing 11 are arranged at intervals along the axial direction; a wheel rim 9 is installed between the front air guide sleeve 1 and the rear air guide sleeve 11 in a co-rotating mode, a permanent magnet 8 is embedded in the middle of the outer wall surface of the wheel rim 9 along the circumferential direction, a sealing plate 6 is installed between the front air guide sleeve 1 and the rear air guide sleeve 11 which are located on the outer side of the circumference of the wheel rim 9, and a gap exists between the inner wall surface of the sealing plate 6 and the outer wall surface of the wheel rim 9; a plurality of through vent holes 12 are formed in the front air guide sleeve 1 and the rear air guide sleeve 11 along the circumferential direction, an opening at one end of each vent hole 12 is communicated with a gap between the sealing plate 6 and the wheel rim 9, and the other end of each vent hole 12 is communicated with an external inflating device; the stator seat 4 is sleeved outside the circumference of the sealing plate 6, the winding 5 is wound on the inner wall surface of the stator seat 4, and the shell 3 is also arranged between the front air guide sleeve 1 and the rear air guide sleeve 11 which are positioned on the circumferential outer wall of the stator seat 4.
Through set up a plurality ofly along the circumferencial direction on preceding kuppe 1 and back kuppe 11 with closing plate 6, rim 9 between the air vent 12 that the clearance link up, under the effect of outside aerating device, form a large amount of bubbles through air vent 12 to this clearance internal filling, form gas-liquid two-phase flow, reduce the water friction in the clearance through the existence of bubble, and then effectively reduced the water friction loss, promoted propulsion efficiency greatly.
The vent holes 12 on the front air guide sleeve 1 are ventilated, or the vent holes 12 on the rear air guide sleeve 11 are ventilated; according to the incoming flow direction, the vent holes 12 of the front air guide sleeve 1 or the vent holes 12 of the rear air guide sleeve 11 are selected, wherein one group is ventilated, and the other group is closed.
The front and rear fairings 1 and 11 are identical in structure, and as shown in fig. 4, the front fairing 1 has the following structure: the device comprises an annular cover body 101, wherein the outer wall surface of the annular cover body 101 is connected with the end surface of the outer end to form a spherical structure; the outer edge of the inner end of the annular cover body 101 is sequentially provided with an outer step I102 and an outer step II 103 along the circumferential direction, the stator seat 4 is accommodated in the outer step I102 of the front air guide sleeve 1 and the outer step II 103 of the rear air guide sleeve 11, and the end of the sealing plate 6 is assembled in a centering mode; the inner edge of the inner end of the annular cover body 101 is sequentially provided with an inner step I104 and an inner step II 105 along the circumferential direction, the inner step I104 and the inner step II 105 of the front air guide sleeve 1 are jointly provided with a static ring of the bearing I2, and the inner step I104 and the inner step II 105 of the rear air guide sleeve 11 are jointly provided with a static ring of the bearing II 10; the orifice at one end of the vent hole 12 is located on the inner end face of the annular cover body 101, and the orifice at the other end of the vent hole 12 is located on the spherical structure.
As shown in fig. 5, a plurality of winding piles 41 extend uniformly along the circumferential direction on the inner wall surface of the stator base 4, the single winding pile 41 is arranged along the axial direction of the stator base 4, the cross section of the single winding pile 41 is of a T-shaped structure, both lower bottom surfaces of the horizontal arm of the single winding pile 41 are of a slope structure inclined towards the vertical arm, and a group of windings 5 are wound on the single winding pile 41.
The permanent magnets 8 comprise N poles and S poles, the single permanent magnets 8 are embedded on the outer wall surface of the rim 9 in the axial direction, and the N poles and the S poles are arranged at intervals.
The rim 9 provided with the permanent magnet 8 forms a rotor, the stator seat 4 provided with the winding 5 forms a stator, the rotor and the stator form a propulsion motor, and the inner paddle 7 is driven to rotate by the electromagnetic force between the rotor and the stator so as to generate propulsion force.
The front air guide sleeve 1 is rotatably connected with the wheel rim 9 through a first bearing 2, and the rear air guide sleeve 11 is rotatably connected with the wheel rim 9 through a second bearing 10; the bearing I2 and the bearing II 10 are both water lubrication bearings, and a moving ring of the bearing I2 and a moving ring of the bearing II 10 are fixedly installed with the wheel rim 9.
Two ends of the sealing plate 6 are respectively and fixedly arranged with the front air guide sleeve 1 and the rear air guide sleeve 11 in a sealing way; two ends of the shell 3 are respectively and fixedly arranged with the front air guide sleeve 1 and the rear air guide sleeve 11 in a sealing way; the stator seat 4 and the winding 5 are hermetically accommodated in the space between the front and rear fairings 1, 11 by the sealing plate 6 and the casing 3.
An inner ring 71 is embedded on the inner wall surface of the rim 9 along the circumferential direction, and a plurality of paddles 7 are uniformly and fixedly arranged on the inner wall surface of the inner ring 71 along the circumferential direction.
In this embodiment, the first bearing 2 and the second bearing 10 are both water-lubricated bearings.
The working principle of the invention is as follows:
when the incoming flow flows from the left to the right, the rotation direction of the paddle 7 is opposite to the incoming flow direction, the pressure at the outlet of the right end of the gap between the sealing plate 6 and the rim 9 is larger than that at the left end, the pressure difference drives the fluid to flow into the gap between the sealing plate 6 and the rim 9 from the gap between the moving ring and the static ring of the right end bearing II 10, at the moment, the vent hole 12 of the right end rear air guide sleeve 11 is opened, and the vent hole 12 of the left end front air guide sleeve 1 is closed; the gas flowing in from the vent hole 12 moves under the drive of certain pressure and fluid speed, and a large amount of gas is filled in the gap between the sealing plate 6 and the wheel rim 9 to form gas-liquid two-phase flow, so that the contact between water and the outer wall surface of the wheel rim 9 is effectively reduced, and the effect of reducing friction resistance is achieved;
similarly, when the paddle 7 rotates reversely, that is, the incoming flow flows from the right to the left, the vent hole 12 of the left front air guide sleeve 1 is opened, and the vent hole 12 of the right rear air guide sleeve 11 is closed, so that the air enters the gap, and the aim of reducing the drag is fulfilled.
Under different external environments, the speed of exhausting air into the gap by the ventilating device is controlled, so that the gap area is kept in a state of being filled with a large number of bubbles, and water friction is reduced to achieve drag reduction.
The invention has compact, reasonable and ingenious structure, effectively reduces water friction loss and greatly improves the propulsion efficiency.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (8)
1. A low loss underwater rim propulsion device, comprising: the air guide device comprises a front air guide sleeve (1) and a rear air guide sleeve (11) which are arranged oppositely, wherein the front air guide sleeve (1) and the rear air guide sleeve (11) are both of annular structures, and the front air guide sleeve (1) and the rear air guide sleeve (11) are arranged at intervals along the axial direction; a wheel rim (9) is installed between the front air guide sleeve (1) and the rear air guide sleeve (11) in a co-rotating mode, a permanent magnet (8) is embedded in the middle of the outer wall surface of the wheel rim (9) along the circumferential direction, a sealing plate (6) is installed between the front air guide sleeve (1) and the rear air guide sleeve (11) which are located on the outer side of the circumference of the wheel rim (9), and a gap exists between the inner wall surface of the sealing plate (6) and the outer wall surface of the wheel rim (9); a plurality of through vent holes (12) are formed in the front flow guide cover (1) and the rear flow guide cover (11) along the circumferential direction, an opening at one end of each vent hole (12) is communicated with a gap between the sealing plate (6) and the wheel rim (9), and the other end of each vent hole (12) is communicated with an external inflating device; the stator seat (4) is sleeved outside the circumference of the sealing plate (6), a winding (5) is wound on the inner wall surface of the stator seat (4), and a shell (3) is further arranged between the front air guide sleeve (1) and the rear air guide sleeve (11) on the circumferential outer wall of the stator seat (4).
2. The low loss underwater rim propulsion device of claim 1 in which: the vent holes (12) on the front air guide sleeve (1) are ventilated, or the vent holes (12) on the rear air guide sleeve (11) are ventilated.
3. The low loss underwater rim propulsion device of claim 1 in which: preceding kuppe (1) is the same with back kuppe (11) structure, the structure of preceding kuppe (1) is: the spherical cover comprises an annular cover body (101), wherein the outer wall surface of the annular cover body (101) is connected with the end surface of the outer end to form a spherical structure; the outer edge of the inner end of the annular cover body (101) is sequentially provided with a first outer step (102) and a second outer step (103) along the circumferential direction, and the inner edge of the inner end of the annular cover body (101) is sequentially provided with a first inner step (104) and a second inner step (105) along the circumferential direction; and an orifice at one end of the vent hole (12) is positioned on the inner end surface of the annular cover body (101), and an orifice at the other end of the vent hole (12) is positioned on the spherical structure.
4. The low loss underwater rim propulsion device of claim 1 in which: the stator structure is characterized in that a plurality of winding piles (41) uniformly extend along the circumferential direction on the inner wall surface of the stator seat (4), the single winding pile (41) is axially arranged along the stator seat (4), the section of the single winding pile (41) is of a T-shaped structure, two lower bottom surfaces of a horizontal arm of the single winding pile (41) are inclined surface structures inclining towards a vertical arm, and a group of windings (5) are wound on the single winding pile (41).
5. The low loss underwater rim propulsion device of claim 1 in which: the permanent magnets (8) comprise N poles and S poles, the single permanent magnets (8) are embedded on the outer wall surface of the wheel rim (9) along the axial direction of the wheel rim, and the N poles and the S poles are arranged at intervals.
6. The low loss underwater rim propulsion device of claim 1 in which: the front air guide sleeve (1) is rotatably connected with the wheel rim (9) through a bearing I (2), and the rear air guide sleeve (11) is rotatably connected with the wheel rim (9) through a bearing II (10); the bearing I (2) and the bearing II (10) are both water lubrication bearings, and a moving ring of the bearing I (2) and a moving ring of the bearing II (10) are fixedly installed on the wheel rim (9).
7. The low loss underwater rim propulsion device of claim 1 in which: two ends of the sealing plate (6) are respectively and fixedly mounted with the front air guide sleeve (1) and the rear air guide sleeve (11) in a sealing manner; two ends of the shell (3) are respectively and fixedly sealed with the front air guide sleeve (1) and the rear air guide sleeve (11).
8. The low loss underwater rim propulsion device of claim 1 in which: an inner ring (71) is embedded on the inner wall surface of the rim (9) along the circumferential direction, and a plurality of paddles (7) are uniformly and fixedly arranged on the inner wall surface of the inner ring (71) along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743866.7A CN111846174B (en) | 2020-07-29 | 2020-07-29 | Low-loss underwater rim propulsion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743866.7A CN111846174B (en) | 2020-07-29 | 2020-07-29 | Low-loss underwater rim propulsion device |
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| Publication Number | Publication Date |
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| CN111846174A CN111846174A (en) | 2020-10-30 |
| CN111846174B true CN111846174B (en) | 2021-07-27 |
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| CN202010743866.7A Active CN111846174B (en) | 2020-07-29 | 2020-07-29 | Low-loss underwater rim propulsion device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112407210B (en) * | 2020-11-23 | 2021-08-10 | 上海斯玛德大推船用螺旋桨设计有限公司 | Rim propeller capable of adjusting angle of prerotation stator |
| CN115743485B (en) * | 2022-11-24 | 2023-10-31 | 深海技术科学太湖实验室 | Deep sea rim propeller with integrated resistance and vibration reduction |
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| US8299669B2 (en) * | 2010-10-18 | 2012-10-30 | Hamilton Sundstrand Corporation | Rim driven thruster having transverse flux motor |
| CN107499487A (en) * | 2017-08-15 | 2017-12-22 | 武汉理工大学 | Propulsion and generating integration device are driven to runner edge based on shaftless |
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2020
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| CN108730349A (en) * | 2018-05-25 | 2018-11-02 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of integrated form oil-lubricated bearing having hub wheel edge propeller for deep-sea |
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