CN109178268B - External drive type marine propulsion system - Google Patents
External drive type marine propulsion system Download PDFInfo
- Publication number
- CN109178268B CN109178268B CN201811068421.2A CN201811068421A CN109178268B CN 109178268 B CN109178268 B CN 109178268B CN 201811068421 A CN201811068421 A CN 201811068421A CN 109178268 B CN109178268 B CN 109178268B
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- Prior art keywords
- propeller
- pipeline
- propulsion system
- hull
- gear
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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
- B63H1/16—Propellers having a shrouding ring attached to blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
-
- 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
- B63H1/16—Propellers having a shrouding ring attached to blades
- B63H2001/165—Hubless propellers, e.g. peripherally driven shrouds with blades projecting from the shrouds' inside surfaces
Abstract
The invention provides an external drive marine propulsion system, which comprises a main machine shafting part and a propeller part, wherein the main machine shafting part is packaged in a hull shell, and the propeller part is arranged at the bottom of a hull and is arranged outside the hull shell; the main machine shafting part comprises an engine, a rotating main shaft is fixed on a rotating shaft of the engine, and a driving gear is arranged on the rotating main shaft; the propeller part is equipped with the annular duct shell body of encapsulation propeller, and the duct shell body is provided with the opening, and is provided with the supporting seat in opening department and is used for fixed drive gear, and duct shell body inner circle is fixed with propeller pipeline bearing, and the propeller pipeline is installed to propeller pipeline bearing inner circle, and the inner circle of propeller pipeline evenly is fixed with a plurality of propeller blades, and the outer lane of propeller pipeline is fixed with propeller pipeline outer gear, propeller pipeline outer gear and drive gear meshing. The propulsion system provided by the invention has excellent hydrodynamic performance, and greatly improves the flexibility.
Description
Technical Field
The invention relates to the field of ship power design, in particular to an external drive type marine propulsion system.
Background
Existing marine propulsors are primarily propellers, including some forms of propulsors, most conventional open propellers, and the like. Most of the existing propellers work in a mode that a rotating shaft directly drives blades, so that the freedom of propeller blade design is severely limited, and the reason is that the small-radius position of the propeller in the direct shaft driving mode needs to be very thick, the contribution to the thrust is very small, and the local part of the propeller is easy to generate vortex; in addition, the position of the blade tip of the propeller in a direct shaft driving mode is mostly open, which can cause a three-dimensional wing effect, namely, the blade tip of the propeller has transverse flow around from the blade surface to the blade back direction, the flow around influences the original excellent airfoil characteristics, reduces the pressure difference on two sides of the blade and disturbs the flow field near the blade tip; the problem of shafting torsional vibration is also a problem to be faced by the propulsion mode; finally, the propeller with low rotating speed and large diameter can improve the propelling efficiency, but the low rotating speed main engine which directly drives the propeller to operate needs long stroke, the size of the main engine is large and is not beneficial to arrangement, and the main engine with high rotating speed needs to use a gear box to reduce the output rotating speed in use, so that the propeller is low in efficiency and tedious.
Disclosure of Invention
The invention provides an external drive marine propulsion system, which comprises a main machine shafting part and a propeller part, wherein the main machine shafting part is packaged in a hull shell, and the propeller part is arranged at the bottom of a hull and is arranged outside the hull shell;
the main machine shafting part comprises an engine, a rotating main shaft extending towards the stern direction is fixed on a rotating shaft of the engine, and a driving gear is arranged on the rotating main shaft;
the propeller part is provided with an annular pipeline outer shell for packaging the propeller, the pipeline outer shell is provided with a gap, a supporting seat is arranged at the gap for fixing the driving gear,
the inner ring of the pipeline shell body is fixed with a propeller pipeline bearing, the inner ring of the propeller pipeline bearing is provided with a propeller pipeline, the inner ring of the propeller pipeline is uniformly fixed with a plurality of propeller blades, the tail parts of the propeller blades are fixed on the inner ring of the propeller pipeline, the tips gather to the axial lead of the propeller pipeline, the outer ring of the propeller pipeline is fixed with a propeller pipeline outer gear, and the propeller pipeline outer gear is meshed with the driving gear.
Furthermore, the upper part of the pipeline outer shell is hermetically connected with the hull shell, so that the pipeline outer shell and the hull shell are integrated.
Furthermore, the propeller pipeline bearing is provided with a circle of openings, and the external propeller pipeline gear is exposed through the openings of the propeller pipeline bearing and is meshed with the driving gear.
Further, the joint of the propeller channel bearing and the propeller channel is lubricated by using balls and/or lubricating oil.
Furthermore, the propeller blades, the propeller pipeline and the external gear of the propeller pipeline are cast and processed into a whole.
Further, the driving gear is mounted at the end of the rotating main shaft in a keyless connection mode.
Further, each propeller blade is a conical blade or a helical blade.
Further, the rotating spindle between the drive gear and the motor is mounted in a series of spindle bearings.
The invention provides a novel marine propulsion system, which is characterized in that blades for propulsion, a guide pipe on the outer side of the blades and a gear on the outer side of the blades are designed into a whole, and a main engine driving shaft drives the gear to rotate from the outer side of the blades of a propeller and generate thrust to propel a ship to advance. The invention has the advantages that:
(1) the root of the blade in the design is at the position of the maximum radius, and the blade tip and the guide pipe are integrated, so that the three-dimensional wing effect is effectively limited; secondly, the position of the blade tangent plane with larger contribution to the thrust is stressed with smaller moment, and the position with larger moment is the position with smaller contribution to the thrust, so that smaller stress is caused in the blade, and the requirement on lower strength is met;
(2) the propeller in the design can be driven to directly drive the medium and high speed machine, so that the arrangement space is saved, and meanwhile, a reduction gearbox is not required to be additionally arranged; in addition, the design can be integrated into a module, the module is arranged at the bottom of the stern and protrudes out of the bottom of the ship, and the module works in a circumferential uniform flow field, so that better hydrodynamic performance is obtained;
(3) the design is an outer conduit drive, the length of the blade can be from a larger radius position to the blade tip, so that a large area in the center of the propeller is blank, and the blade tangent plane is not arranged, thereby avoiding the hub vortex and local low efficiency of the propeller; finally, the blades are driven by the outer conduit rather than the shaft directly, which avoids design factors in shaft strength, and switching of operating conditions such as forward turning and reverse turning is easier to achieve, which greatly improves flexibility.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an externally driven marine propulsion system according to the present invention;
FIG. 2 is a front view of the propulsion system;
FIGS. 3-4 are top and side views of the propulsion system;
FIG. 5 is a three-dimensional view of an externally driven marine propulsion system;
FIG. 6 is a three-dimensional view of a propeller portion;
FIG. 7 is an exploded view of the parts assembly of the impeller portion;
FIG. 8 is a three-dimensional view of an integrated impeller blade, impeller tunnel, and impeller tunnel outer gear;
fig. 9a, 9b are schematic views of two propeller blades in practice.
Description of reference numerals: 1 rotating a main shaft; 2-series main shaft bearings; 3 driving the gear; 4 a hull shell; 5, propeller channels; 6 propeller channel external gear; 7 propeller axis of rotation; 8 propeller tube bearings; 9a pipeline outer shell; 10 propeller blades; 11 an engine; 12 supporting the base.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
The object of the present design is to propose a new form of propulsion system which avoids many of the drawbacks of the prior art and thus achieves superior performance. The existing mainstream propeller has the following defects in the working process: firstly, the blade generates a pressure difference between the blade back and the blade surface so as to form thrust, and due to the three-dimensional wing effect, the pressure difference can cause the generation of a streaming around the tip of the blade, and the streaming field is disturbed so as to enable the airfoil profile not to maintain excellent characteristics any more; secondly, as the blade section at the position with large radius generates larger thrust at the position with smaller radius, the larger force distributed on the blade generates longer moment, which is unfavorable for strength; thirdly, the medium-high speed marine diesel engine is required to be provided with a reduction gearbox to complete the transmission of torque to drive a low-speed rotating propeller, the operation is complicated, the operation is low-efficiency, and the low-speed marine diesel engine without the reduction gearbox is large in size due to large stroke and is not beneficial to arrangement; in addition, the conventional propeller is often placed behind a ship and is obviously interfered by the ship body, and the propeller is a machine rotating in the circumferential direction and works in a circumferentially uneven flow field, which is obviously disadvantageous; moreover, for the shaft-driven propeller, the thrust contribution is mainly from the blade tangent plane at the large radius position, so that the blade of the shaft-driven propeller must extend from the blade root to the blade tip and is not flexible enough; finally, for dealing with sudden working conditions, the propeller is changed from a forward driving process to a reverse driving process, the shaft driving propeller needs to deal with larger torque, and the requirement on the strength of a shaft is very high.
Aiming at the defects of the prior art, the invention provides an external drive type marine propulsion system, which comprises a main machine shafting part and a propeller part, wherein the main machine shafting part is packaged in a hull shell 4, and the propeller part is arranged at the bottom of a hull and is arranged outside the hull shell; the main machine shafting part comprises an engine (preferably a diesel engine), a rotating main shaft 1 extending towards the stern direction is fixed on a rotating shaft of the engine, and a driving gear 3 is arranged on the rotating main shaft 1; the propeller part is equipped with the annular duct shell body 9 of encapsulation propeller, duct shell body 9 is provided with the opening, and be provided with the supporting seat in opening department and be used for fixed drive gear 3, 9 inner circles of duct shell body are fixed with propeller pipeline bearing 8, propeller pipeline 5 is installed to 8 inner circles of propeller pipeline bearing, the inner circle of propeller pipeline 5 evenly is fixed with a plurality of propeller blades 10, the inner circle at propeller pipeline 5 is fixed to the afterbody of propeller blade 10, the tip extends to the axial lead of propeller pipeline 5, and the outer lane of propeller pipeline 5 is fixed with propeller pipeline outer gear 6, propeller pipeline outer gear 6 meshes with drive gear 3.
The propeller channel bearing 8 is provided with a circle of openings, and the external propeller channel gear 6 is exposed through the openings of the propeller channel bearing 8 and is engaged with the drive gear 3. Alternatively, the driving gear 3 is mounted at the end of the rotating main shaft 1 in a keyless manner.
The propeller blades 10, the propeller pipeline 5 and the propeller pipeline outer gear 6 are cast and processed into a whole, the propeller pipeline bearing 8 is fixed inside the pipeline outer shell 9, after the propeller blades 10 and part of the propeller pipeline 5 are packaged, only the propeller blades 10 and the part of the propeller pipeline 5 are exposed outside the pipeline outer shell 9, and the upper part of the pipeline outer shell 9 is connected with the ship hull shell 4 for packaging the propeller, so that the propeller and the ship hull shell are integrated. The shaft system part and the propeller part are connected through meshing of gears, and the strength of 4 and 9 is ensured through structural reinforcement so as to support the weight and the stress of the propeller part. The propeller part can be built together when the ship section is built, and can also be installed after the ship body is built by adopting a modularized thought.
Each propeller blade 10 is a conical blade or a helical blade. Fig. 9a and 9b illustrate the form of the propeller blades, either with zero skew (fig. 9a) or with a radial difference in skew (fig. 9 b).
The rotating main shaft 1 between the drive gear 3 and the motor 11 is mounted in a series of main shaft bearings 2.
When the propeller shaft system works, the engine 11 emits power and drives the rotating main shaft 1 to rotate, the rotating main shaft 1 drives the driving gear 3 arranged on the rotating main shaft to rotate, and the driving gear 3 on the shaft system drives the propeller pipeline outer gear 6 meshed with the driving gear to rotate so as to drive the blades to rotate and emit thrust. The propeller shaft bearing 8 and propeller shaft 5 may be lubricated by balls or oil or a combination of both to improve power transmission efficiency. In addition, the water tightness of the system needs to be guaranteed, and water inflow of a cabin is avoided.
The improvements made by the present invention are embodied in the following aspects:
(1) the root of the blade in the design is at the position of the maximum radius, and the blade tip and the guide pipe are integrated, so that the three-dimensional wing effect is effectively limited; secondly, the position of the blade tangent plane with larger contribution to the thrust is stressed with smaller moment, and the position with larger moment is the position with smaller contribution to the thrust, so that smaller stress is caused in the blade, and the requirement on lower strength is met;
(2) the propeller in the design can be driven to directly drive the medium and high speed machine, so that the arrangement space is saved, and meanwhile, a reduction gearbox is not required to be additionally arranged; in addition, the design can be integrated into a module, the module is arranged at the bottom of the stern and protrudes out of the bottom of the ship, and the module works in a circumferential uniform flow field, so that better hydrodynamic performance is obtained;
(3) the design is an outer conduit drive, the length of the blade can be from a larger radius position to the blade tip, so that a large area in the center of the propeller is blank, and the blade tangent plane is not arranged, thereby avoiding the hub vortex and local low efficiency of the propeller; finally, the blades are driven by the outer conduit rather than the shaft directly, which avoids design factors in shaft strength, and switching of operating conditions such as forward turning and reverse turning is easier to achieve, which greatly improves flexibility.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (7)
1. An external drive marine propulsion system is characterized by comprising a main engine shafting part and a propeller part, wherein the main engine shafting part is packaged in a hull shell (4), and the propeller part is arranged at the bottom of a hull and is arranged outside the hull shell;
the main machine shafting part comprises an engine (11), a rotating shaft of the engine (11) is fixedly provided with a rotating main shaft (1) extending towards the stern direction, and the rotating main shaft (1) is provided with a driving gear (3);
the propeller part is provided with an annular pipeline outer shell (9) for packaging the propeller, the pipeline outer shell (9) is provided with a gap, a supporting seat (12) is arranged at the gap and used for fixing the driving gear (3),
a propeller pipeline bearing (8) is fixed on the inner ring of the pipeline outer shell (9), a propeller pipeline (5) is installed on the inner ring of the propeller pipeline bearing (8), a plurality of propeller blades (10) are uniformly fixed on the inner ring of the propeller pipeline (5), the tails of the propeller blades (10) are fixed on the inner ring of the propeller pipeline (5), the tips gather to the axial lead of the propeller pipeline (5), a propeller pipeline outer gear (6) is fixed on the outer ring of the propeller pipeline (5), the propeller pipeline outer gear (6) is meshed with the driving gear (3), the propeller pipeline bearing (8) is provided with a circle of opening, and the propeller pipeline outer gear (6) is exposed through the opening of the propeller pipeline bearing (8) and is meshed with the driving gear (3);
the propeller blades (10) have their roots at the maximum radius and their tips are integrated with the duct to effectively limit the three-dimensional wing effect.
2. An outboard drive marine propulsion system according to claim 1, in which the upper portion of the duct outer hull (9) is sealingly connected to the hull (4) to integrate the duct outer hull (9) with the hull (4).
3. An externally driven marine propulsion system according to claim 1, characterised in that the connection of the propeller channel bearing (8) to the propeller channel (5) is lubricated with balls and/or oil.
4. An externally driven marine propulsion system according to claim 1, characterised in that the propeller blades (10), the propeller tunnel (5) and the outer propeller tunnel gear (6) are cast in one piece.
5. An externally driven marine propulsion system according to claim 1, characterised in that the driving gear (3) is mounted at the end of the rotating main shaft (1) in a keyless connection.
6. An externally driven marine propulsion system according to claim 1, characterised in that each propeller blade (10) is a conical blade or a helical blade.
7. An externally driven marine propulsion system according to claim 1, characterised in that the rotating main shaft (1) between the driving gear (3) and the engine (11) is mounted in a series of main shaft bearings (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068421.2A CN109178268B (en) | 2018-09-13 | 2018-09-13 | External drive type marine propulsion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068421.2A CN109178268B (en) | 2018-09-13 | 2018-09-13 | External drive type marine propulsion system |
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| Publication Number | Publication Date |
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| CN109178268A CN109178268A (en) | 2019-01-11 |
| CN109178268B true CN109178268B (en) | 2021-02-26 |
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| CN201811068421.2A Active CN109178268B (en) | 2018-09-13 | 2018-09-13 | External drive type marine propulsion system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110481749A (en) * | 2019-09-29 | 2019-11-22 | 杭州诺祥科技有限公司 | A kind of heavy duty Shaftless propeller |
| CN110525622A (en) * | 2019-09-29 | 2019-12-03 | 杭州诺祥科技有限公司 | A kind of Shaftless propeller |
| CN113895601A (en) * | 2021-10-13 | 2022-01-07 | 邓云娣 | Gear-driven shaftless paddle propeller |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267204Y (en) * | 1996-07-05 | 1997-11-12 | 中国船舶科学研究中心 | Full turning |
| JP5872255B2 (en) * | 2011-11-08 | 2016-03-01 | ヤマハ発動機株式会社 | Ship propulsion device |
| CN104326073A (en) * | 2014-10-18 | 2015-02-04 | 无锡德林船舶设备有限公司 | Marine permanent magnet motor thruster propeller |
| TW201628893A (en) * | 2014-12-23 | 2016-08-16 | 席勒運動股份有限公司 | Water bike |
| CN105035289B (en) * | 2015-09-19 | 2017-07-07 | 大连碧蓝节能环保科技有限公司 | Full circle swinging series connection culvert type marine propeller |
| CN106915425A (en) * | 2017-03-21 | 2017-07-04 | 哈尔滨工程大学 | A kind of longitudinal Drum-type ship auxiliary pull apparatus |
| CN107298160A (en) * | 2017-05-18 | 2017-10-27 | 苏州横海信息科技有限公司 | Ship's propeller |
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