CN108974302B - Water jet propulsion device - Google Patents
Water jet propulsion device Download PDFInfo
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- CN108974302B CN108974302B CN201810592587.8A CN201810592587A CN108974302B CN 108974302 B CN108974302 B CN 108974302B CN 201810592587 A CN201810592587 A CN 201810592587A CN 108974302 B CN108974302 B CN 108974302B
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- motor
- water jet
- jet propulsion
- cavity
- propulsion device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient 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
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
Abstract
The invention discloses a water jet propulsion device. The water jet propulsion device comprises: the motor, the transmission shaft, the propeller and the power unit shell; an output shaft of the motor is connected with the propeller through a transmission shaft; the power unit shell is internally provided with a through hole in the middle, and two ends of the through hole are respectively provided with a first cavity and a second cavity; an output shaft of the motor is sealed in the first cavity, the transmission shaft penetrates through the through hole, and the propeller is arranged in the second cavity; the side walls of the second cavities on the two sides of the through hole are provided with water inlets, and one side of the second cavity far away from the through hole is provided with a water outlet. The water jet propulsion device can be separated from the cooling effect of the cooling device, and the running time of the water jet propulsion device is improved.
Description
Technical Field
The invention relates to the technical field of surface vehicles and underwater vehicles, in particular to a water jet propulsion device.
Background
The water jet propulsion device is used as a power device on water surface or in water, and is mainly used for water surface aircrafts, small unmanned boats and the like. With the development of industries such as sea surface operation, seabed operation, seaside and island tourism, the demand of water surface aircrafts or small unmanned boats is increasing day by day, and higher requirements are put forward on the water jet propulsion device.
Fig. 1 is a structural view of a conventional water jet propulsion apparatus. Referring to fig. 1, a motor in a conventional water jet propulsion device is hermetically arranged inside a base body, and a cooling device is arranged around the motor to cool the motor. The output shaft of the motor is connected with the paddle outside the base body through the transmission shaft. The paddle is communicated with the water inlet and the water outlet. When the motor runs, the paddle is driven to run, so that water is sucked from the water inlet and discharged from the water outlet. The long-term operation of the conventional water jet propulsion device relies on the cooling effect of the cooling device, and the long-term operation of the water jet propulsion device is reduced by consuming part of the energy for the operation of the cooling device.
Disclosure of Invention
The invention aims to provide a water jet propulsion device, which is separated from the cooling effect of a cooling device and improves the running time of the water jet propulsion device.
In order to achieve the purpose, the invention provides the following scheme:
a water jet propulsion device comprising: the motor, the transmission shaft, the propeller and the power unit shell; an output shaft of the motor is connected with the propeller through the transmission shaft; the power unit shell is internally provided with a through hole in the middle, and two ends of the through hole are respectively provided with a first cavity and a second cavity; an output shaft of the motor is sealed in the first cavity, the transmission shaft penetrates through the through hole, and the propeller is arranged in the second cavity; the side walls of the second cavity body on the two sides of the through hole are provided with water inlets, and one side of the second cavity body, which is far away from the through hole, is provided with a water outlet.
Optionally, a guide vane cover is further arranged in the second cavity; the guide vane cover is positioned between the propeller and the water outlet; the guide vane cover comprises a central column positioned in the middle, guide vanes capable of rotating around the central column and a guide shell for fixing the central column; the axis of the central column and the axis of the transmission shaft are positioned on the same straight line, and one end of the guide vane cover close to the propeller is provided with a bearing accommodating hole; a first bearing is arranged in the bearing accommodating hole, and the transmission shaft penetrates through the first bearing.
Optionally, a second bearing is arranged in the first cavity, and the transmission shaft penetrates through the second bearing.
Optionally, the water jet propulsion unit further comprises a motor adapter; the motor adapter is fixed between the power unit shell and the motor and used for fixing the motor on the power unit shell; the motor adapter is connected with the motor in a sealing way through a sealing ring; the motor adapter is connected with the power unit shell in a sealing mode through a sealing ring.
Optionally, spacers are respectively embedded between the inner surface of the first cavity and the outer surface of the transmission shaft and between the inner surface of the bearing accommodating hole and the outer surface of the transmission shaft, and the spacers are used for axially positioning the transmission shaft.
Optionally, a motor end cover is fixedly mounted on one side of the motor, which is far away from the output shaft; the motor is embedded in the motor end cover; the outer shape of the motor end cover corresponds to the outer shape of the power unit shell and the shape of the inner surface of a space for installing the water jet propulsion device in the aircraft base body, so that the water jet propulsion device is integrally and fixedly embedded in the aircraft base body.
Optionally, a skeleton sealing ring is further arranged in the first cavity; the skeleton sealing ring is embedded between the outer surface of the transmission shaft and the inner surface of the first cavity, and the skeleton sealing ring is located at the joint of the first cavity and the through hole.
Optionally, a check ring is further disposed in the first cavity; the retaining ring is embedded between the outer surface of the transmission shaft and the inner surface of the first cavity.
Optionally, an output shaft of the motor is connected with the transmission shaft through a jackscrew; the flow guide shell is connected with the power unit shell through a jackscrew.
Optionally, the motor is a dc brushless motor.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the water jet propulsion device disclosed by the invention only seals the connection part of the motor output shaft and the transmission shaft, so that the motor can be exposed in water, the motor is ensured to directly contact with the water when the motor runs, the motor is directly cooled by utilizing the external water, a cooling device is omitted, the consumption of electric energy is reduced, and the longer running time of the motor is ensured. Meanwhile, because the motor is exposed in water, a structure for packaging the motor is omitted, and the structure of the device is greatly simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments 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 without inventive exercise.
FIG. 1 is a block diagram of a conventional water jet propulsion system;
FIG. 2 is an overall view of the water jet propulsion system of the present invention;
FIG. 3 is a front sectional view of a power unit housing of an embodiment of the waterjet propulsion device of the present invention;
FIG. 4 is an elevational, cross-sectional view of a guide vane shroud of an embodiment of the waterjet propulsion device of the present invention;
FIG. 5 is a sectional front view of a motor adapter according to an embodiment of the present invention;
FIG. 6 is a front sectional view of a motor end cap of an embodiment of the water jet propulsion unit of the present invention;
FIG. 7 is a block diagram of the motor of an embodiment of the water jet propulsion system of the present invention;
FIG. 8 is a front sectional view of a drive shaft of an embodiment of the water jet propulsion system of the present invention;
FIG. 9 is a front sectional view of a propeller of an embodiment of the water jet propulsion unit of the present invention;
FIG. 10 is a top view of the power unit housing of an embodiment of the water jet propulsion unit of the present invention;
FIG. 11 is a schematic view of the assembly of the water jet propulsion unit according to the embodiment of the invention;
fig. 12 is an elevational, cross-sectional view of a waterjet propulsion device according to an embodiment of the present invention assembled with a base body of a craft;
fig. 13 is a top sectional view of a waterjet propulsion device according to an embodiment of the invention assembled with a base body of a craft;
FIG. 14 is a schematic view of the general assembly of an embodiment of the water jet propulsion system of the present invention;
fig. 15 is an exploded view of the components of an embodiment of the water jet propulsion system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a water jet propulsion device, which is separated from the cooling effect of a cooling device and improves the running time of the water jet propulsion device.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 2 is an overall configuration diagram of an embodiment of the water jet propulsion system of the present invention.
A water jet propulsion device comprising: the motor 11, the transmission shaft 6, the propeller 7 and the power unit shell 3; the output shaft of the motor 11 is connected with the propeller 7 through the transmission shaft 6.
Fig. 3 is a front sectional view of a power unit housing of an embodiment of the water jet propulsion device of the present invention.
Referring to fig. 2 and 3, a through hole 3-9 is formed in the middle of the power unit shell 3, and a first cavity 3-3 and a second cavity 3-4 are respectively formed at two ends of the through hole 3-9; an output shaft of the motor 11 is sealed in the first cavity 3-3, the transmission shaft 6 penetrates through the through hole 3-9, and the propeller 7 is arranged in the second cavity 3-4; a water outlet 3-11 is arranged on one side of the second cavity 3-4 far away from the through hole 3-9.
A second bearing 15 is arranged in the first cavity 3-3, and the transmission shaft 6 is arranged in the second bearing 15 in a penetrating mode.
A spacer 4, a spacer 5, a check ring 16 and a skeleton sealing ring 17 are embedded between the inner surface of the first cavity 3-3 and the outer surface of the transmission shaft 6; the spacer 4, the second bearing 15, the retainer ring 16, the spacer 5 and the skeleton seal ring 17 are arranged in sequence. The skeleton sealing ring 17 is positioned at the joint of the first cavity 3-3 and the through hole 3-9.
The spacer 4, the spacer 5, the bearing 14 and the retainer ring 16 are used for axially positioning the transmission shaft 6.
Fig. 4 is a front sectional view of a guide vane shroud of an embodiment of the water jet propulsion unit of the present invention.
Referring to fig. 2 and 4, a guide vane cover 9 is further arranged in the second cavity 3-4; the guide vane cover 9 is positioned between the propeller 7 and the water outlet 3-11; the guide vane cover 9 comprises a central column 9-4 positioned in the middle, guide vanes 9-5 capable of rotating around the central column 9-4 and a guide shell 9-2 for fixing the central column 9-4; the axis of the central column 9-4 and the axis of the transmission shaft 6 are positioned on the same straight line, and one end of the guide vane cover 9 close to the propeller 7 is provided with a bearing accommodating hole 9-1; a first bearing 18 is arranged in the bearing accommodating hole 9-1, and the transmission shaft 6 penetrates through the first bearing 18. The guide shell 9-2 is provided with a positioning hole 9-3, the positioning hole 9-3 is used for installing a jackscrew 19, and the jackscrew 19 is used for fixedly connecting the guide vane cover 9 with the power unit shell 3.
And a spacer 8 is embedded between the inner surface of the bearing accommodating hole 9-1 and the outer surface of the transmission shaft 6.
Fig. 5 is a front sectional view of a motor adapter of an embodiment of the water jet propulsion device of the invention.
Referring to fig. 2, 3 and 5, the water jet propulsion unit further comprises a motor adapter 2; the motor adapter 2 is fixed between the power unit shell 3 and the motor 11 and used for fixing the motor 11 on the power unit shell 3; the motor adapter 2 is connected with the motor 11 in a sealing way through a sealing ring 12; the motor adapter 2 is connected with the power unit shell 3 in a sealing mode through a sealing ring 14.
A mounting hole 2-1 is formed in one surface, which is in contact with the motor 11, of the motor adapter 2, and the mounting hole 2-1 is used for fixedly connecting the motor 11 with the motor adapter 2 through fixing devices such as screws or jackscrews; a first annular groove 2-2 is further formed in the surface, contacting the motor 11, of the motor adapter 2, and the sealing ring 12 is installed in the first annular groove 2-2. An internal thread 2-3 is arranged on the inner surface of the motor adapter 2, which is in contact with the power unit shell 3, and an external thread 3-1 is arranged on the position, corresponding to the internal thread 2-3, of the power unit shell 3; the power unit shell 3 is fixedly connected with the motor adapter 2 through the internal thread 2-3 and the external thread 3-1; a second annular groove 3-2 is further formed in the surface, in contact with the motor adapter 2, of the power unit shell 3, and the sealing ring 14 is installed in the second annular groove 3-2.
Fig. 6 is a front sectional view of a motor end cover of the embodiment of the water jet propulsion device of the invention.
Referring to fig. 2 and 6, a motor end cover 1 is fixedly mounted on one side of the motor 11 away from the output shaft; the motor 11 is embedded in the motor end cover 1. And motor end cover grooves 1-2 are formed in the inner surface of the motor end cover 1, which is in contact with the motor 11. And a sealing ring 10 is arranged in the motor end cover groove 1-2. And a boss 1-1 is arranged on the outer surface of the motor end cover groove 1-2.
Fig. 7 is a structural view of a motor of an embodiment of the water jet propulsion system of the present invention.
Referring to fig. 2 and 7, the motor 11 is a dc brushless motor 11. The output shaft of the motor is a D-shaped output shaft 11-1.
Fig. 8 is a front sectional view of a drive shaft of an embodiment of the water jet propulsion device of the present invention.
Referring to fig. 2 and 8, a connecting hole 6-2 is formed at one end of the transmission shaft 6 connected with an output shaft of the motor 11, and the output shaft of the motor 11 is inserted into the connecting hole 6-2. Threaded holes 6-1 are formed in two sides of the connecting hole 6-2, and jackscrews 13 are inserted into the threaded holes 6-1. The jackscrew 13 is used for fixedly connecting the output shaft of the motor 11 with the transmission shaft 6. A shaft shoulder 6-3 is arranged at the position of the transmission shaft 6 connected with the propeller 7, and the diameter of the transmission shaft at one side of the shaft shoulder 6-3 close to the output shaft of the motor 11 is larger than that of the transmission shaft at one side of the shaft shoulder 6-3 far away from the output shaft of the motor 11. The transmission shaft on the side, away from the output shaft of the motor 11, of the shaft shoulder 6-3 is a D-shaped shaft 6-4.
A jackscrew 13 in a threaded hole 6-1 of the transmission shaft 6 is propped against a D-shaped output shaft 11-1 of the motor 11 to transmit torque and drive the transmission shaft 6 to rotate, and meanwhile, the connection hole 6-2 is matched with the D-shaped output shaft 11-1 to ensure that the transmission shaft 6 and the D-shaped output shaft 11-1 of the motor 11 are kept concentric.
The shaft shoulder 6-3 is used for axially limiting the propeller 7.
Fig. 9 is a front sectional view of a propeller of an embodiment of the water jet propulsion device according to the invention.
Referring to fig. 9, the center of the propeller 7 is a D-shaped hole 7-1, and the size of the D-shaped hole 7-1 is matched with the shape of the D-shaped shaft 6-4.
Fig. 10 is a top view of a power unit housing of an embodiment of the waterjet propulsion device of the present invention.
Fig. 11 is a schematic view showing an assembling direction of the water jet propulsion device according to the embodiment of the water jet propulsion device of the present invention.
Fig. 12 is a front sectional view of a waterjet propulsion device according to an embodiment of the waterjet propulsion device according to the invention assembled with a substrate of a craft.
Fig. 13 is a top sectional view of a waterjet propulsion device according to an embodiment of the invention assembled with a base body of a craft.
Referring to fig. 10 to 13, the power unit housing 3 is provided with housing threaded holes 3-5 at the top, and the housing threaded holes 3-5 are used for fixedly connecting with the aircraft base body 20. And water inlets 3-6 are formed in the side walls of the second cavities 3-4 on the two sides of the through holes 3-9. And flanges 3-7 are arranged on the outer surface of the power unit shell 3. The rims 3-7 are intended to be in contact with the vehicle base body 20 for transmitting thrust. Inwardly recessed in the middle of the outer surface of the power unit casing 3, so that the non-recessed part of the power unit casing 3 protrudes outwardly, which protrusion acts with the craft base body 20 to transmit thrust to the craft base body 20.
The outer shape of the motor end cover 1 and the outer shape of the power unit shell 3 correspond to the shape of the inner surface of a space for installing the water jet propulsion device in the aircraft base body 20, so that the water jet propulsion device is integrally and fixedly embedded in the aircraft base body 20. And the protruding part also provides space for water to enter.
The sealing rings 10, 12 and 14 in the invention are all O-shaped rings. The sealing ring 10, the sealing ring 12, the sealing ring 14 and the sealing function of the skeleton sealing ring 17 can prevent water from entering the motor 11, and prevent the motor 11 from water inlet damage.
FIG. 14 is a schematic view of the overall assembly of an embodiment of the water jet propulsion system of the present invention.
Fig. 15 is an exploded view of the components of an embodiment of the water jet propulsion system of the present invention.
Referring to fig. 11 to 15, when the water jet propulsion device of the present invention is applied, the water jet propulsion device is completely immersed in water, the motor 11 drives the propeller 7 to rotate to form negative pressure, water flow enters the water jet propulsion device through water channels below and on both sides of the water jet propulsion device, the water flow is changed into high-pressure high-speed water flow through the propeller, partial circumferential rotation kinetic energy of the water flow is recovered under the flow guiding effect of the guide vane cover 9 to obtain higher axial flow velocity, and the water flow is ejected from the nozzle of the guide vane cover 9 to obtain thrust.
The water jet propulsion device disclosed by the invention only seals the connection part of the motor output shaft and the transmission shaft, so that the motor can be exposed in water, the motor is ensured to directly contact with the water when the motor runs, the motor is directly cooled by utilizing the external water, a cooling device is omitted, the consumption of electric energy is reduced, and the longer running time of the motor is ensured. Meanwhile, because the motor is exposed in water, a structure for packaging the motor is omitted, and the structure of the device is greatly simplified. Meanwhile, the motor and the propeller are integrated into a whole by utilizing structures such as a power unit shell and the like, a modular structure is formed, the size space and the weight are greatly reduced, the integral disassembly of the water jet propulsion device is facilitated, and the assembly and the maintenance are convenient.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A water jet propulsion device, comprising: the motor, the transmission shaft, the propeller and the power unit shell; an output shaft of the motor is connected with the propeller through the transmission shaft; the power unit shell is internally provided with a through hole in the middle, and two ends of the through hole are respectively provided with a first cavity and a second cavity; an output shaft of the motor is sealed in the first cavity, the transmission shaft penetrates through the through hole, and the propeller is arranged in the second cavity; water inlets are formed in the side walls of the second cavity below, on the left and on the right of the through hole, and a water outlet is formed in one side of the second cavity far away from the through hole; the water jet propulsion device is assembled in a water flow channel in a base body of an aircraft;
a guide vane cover is also arranged in the second cavity; the guide vane cover is positioned between the propeller and the water outlet; the guide vane cover comprises a central column positioned in the middle, guide vanes capable of rotating around the central column and a guide shell for fixing the central column; the axis of the central column and the axis of the transmission shaft are positioned on the same straight line, and one end of the guide vane cover close to the propeller is provided with a bearing accommodating hole; a first bearing is arranged in the bearing accommodating hole, and the transmission shaft penetrates through the first bearing.
2. A water jet propulsion device as claimed in claim 1, wherein a second bearing is provided in the first chamber, the drive shaft being arranged to pass through the second bearing.
3. A water jet propulsion device as claimed in claim 1, further comprising a motor adaptor; the motor adapter is fixed between the power unit shell and the motor and used for fixing the motor on the power unit shell; the motor adapter is connected with the motor in a sealing way through a sealing ring; the motor adapter is connected with the power unit shell in a sealing mode through a sealing ring.
4. The water jet propulsion device according to claim 1, wherein spacers are embedded between the inner surface of the first cavity and the outer surface of the drive shaft and between the inner surface of the bearing accommodating hole and the outer surface of the drive shaft, and the spacers are used for axially positioning the drive shaft.
5. A water jet propulsion unit as claimed in claim 1 wherein a motor end cap is fixedly mounted on the side of the motor remote from the output shaft; the motor is embedded in the motor end cover; the outer shape of the motor end cover corresponds to the outer shape of the power unit shell and the shape of the inner surface of a space for installing the water jet propulsion device in the aircraft base body, so that the water jet propulsion device is integrally and fixedly embedded in the aircraft base body.
6. The water jet propulsion device of claim 1, wherein a skeletal seal is further disposed within the first cavity; the skeleton sealing ring is embedded between the outer surface of the transmission shaft and the inner surface of the first cavity, and the skeleton sealing ring is located at the joint of the first cavity and the through hole.
7. A water jet propulsion unit as claimed in claim 1, wherein a retaining ring is also provided in the first chamber; the retaining ring is embedded between the outer surface of the transmission shaft and the inner surface of the first cavity.
8. A water jet propulsion unit as claimed in claim 1, wherein the output shaft of the motor is connected to the drive shaft by a jackscrew; the flow guide shell is connected with the power unit shell through a jackscrew.
9. A water jet propulsion device according to claim 1, wherein said electric motor is a dc brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810592587.8A CN108974302B (en) | 2018-06-11 | 2018-06-11 | Water jet propulsion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810592587.8A CN108974302B (en) | 2018-06-11 | 2018-06-11 | Water jet propulsion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108974302A CN108974302A (en) | 2018-12-11 |
| CN108974302B true CN108974302B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810592587.8A Active CN108974302B (en) | 2018-06-11 | 2018-06-11 | Water jet propulsion device |
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| CN (1) | CN108974302B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111516837B (en) * | 2020-05-21 | 2021-02-26 | 杭州电子科技大学 | AUV propulsion unit with built-in steering |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3239955B2 (en) * | 1992-02-17 | 2001-12-17 | 三信工業株式会社 | Jet propulsion device |
| US5490768A (en) * | 1993-12-09 | 1996-02-13 | Westinghouse Electric Corporation | Water jet propulsor powered by an integral canned electric motor |
| JP3317618B2 (en) * | 1995-10-04 | 2002-08-26 | ヤマハ発動機株式会社 | Arrangement structure of inboard components of water jet propulsion boat |
| CN2771100Y (en) * | 2005-03-22 | 2006-04-12 | 胡济荣 | Hydrojet propeller |
| CN105035295B (en) * | 2015-07-01 | 2018-01-05 | 胡景威 | Rudder paddle shaft installs all-in-one |
| CN106882343B (en) * | 2017-02-09 | 2019-01-04 | 浙江一苇运动用品有限公司 | High speed motive force slide plate |
| CN107618646A (en) * | 2017-08-31 | 2018-01-23 | 珠海动力海岸智能科技有限公司 | It is a kind of from the cold 180 degree of powered water transfer it is two-way enter water-jetting type high-speed thruster |
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2018
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