CN204236757U - A kind of screw propeller - Google Patents
A kind of screw propeller Download PDFInfo
- Publication number
- CN204236757U CN204236757U CN201420615274.7U CN201420615274U CN204236757U CN 204236757 U CN204236757 U CN 204236757U CN 201420615274 U CN201420615274 U CN 201420615274U CN 204236757 U CN204236757 U CN 204236757U
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- described blade
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- blade root
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Abstract
This application discloses a kind of screw propeller, comprise prop shaft, the outer shroud week of prop shaft is provided with multiple blade, each blade all has blade root section and blade tip section, the upper surface of blade root section is formed with convex arc section, convex arc section extends to the trailing edge of blade root section by the leading edge of blade root section and across blade root section, the lower surface of blade root section is formed with partes glabra, and is all formed with sharp-pointed guide lug in the leading edge of blade root section and the trailing edge of blade root section; The upper surface of blade tip section is formed with convex arc section, upper convex arc section by the leading edge of blade tip section extend to blade tip section trailing edge and across blade tip section, the lower surface of blade tip section is formed with lower concave-arc part, make the curved airfoil structure of blade tip section, thus, produced by blade root section and stablize laminar cavitation and cavitation corrosion not easily occurs, and make efficiency of movement by blade tip section lifting blade, solve the Cavitation of inclined shaft screw propeller, and maintain high efficiency propulsion quality.
Description
Technical field
The utility model relates to screw propeller, particularly relates to a kind of screw propeller of boats and ships.
Background technology
General boats and ships utilize the turn of screw propeller to drive current, and utilize the antagonistic force of water to promote motion of ship.The screw propeller of general high-speed ship is arranged with inclined shaft, because screw propeller is in inclined shaft state, screw propeller is made to become a mandarin except axially becoming a mandarin, also comprise the speed component in vertical direction, vertical force is produced when thus allowing screw propeller operate, cause the screw propeller being in inclined shaft situation to have blade cavitation corrosion more easily occurs more flat axle screw propeller problem, causes the screw propeller life-span to subtract greatly.
Utility model content
The purpose of this utility model is to provide a kind of screw propeller, solves one or more in above-mentioned prior art problem.
According to an aspect of the present utility model, a kind of screw propeller is provided, comprise prop shaft, the outer shroud week of prop shaft is provided with multiple blade, and each blade comprises blade root section and blade tip section, and the upper surface of blade root section is formed with convex arc section, convex arc section by the aerofoil profile leading edge of blade root section extend to blade root section airfoil trailing edge and across blade root section, the lower surface of blade root section is formed with partes glabra, and is formed with the first sharp-pointed guide lug in the aerofoil profile leading edge of blade root section, and the airfoil trailing edge of blade root section is formed with the second sharp-pointed guide lug; The upper surface of blade tip section is formed with convex arc section, and upper convex arc section extends to the airfoil trailing edge of blade tip section by the aerofoil profile leading edge of blade tip section and across blade tip section, the lower surface of blade tip section is formed with lower concave-arc part, makes the curved airfoil structure of blade tip section.
In some embodiments: the lower surface of blade tip section is also provided with lower convex arc section, and the airfoil trailing edge of the lower surface of blade tip section is located in lower convex arc section, the aerofoil profile leading edge sectional area of blade tip section is made to be less than the airfoil trailing edge sectional area of blade tip section.
In some embodiments: blade is extended with arcuation along the outer shroud week of prop shaft.
In some embodiments: blade was evenly distributed in the outer shroud week of prop shaft.
In some embodiments: blade is fan-shaped.
The utility model is produced by blade root section stablize laminar cavitation and cavitation corrosion not easily occurs, and promote blade by blade tip section make efficiency of movement, the Cavitation of solution inclined shaft screw propeller, and maintain high efficiency propulsion quality.
Accompanying drawing explanation
Fig. 1 is the block diagram of a kind of screw propeller of the utility model;
Fig. 2 is the front elevation of a kind of screw propeller of the utility model;
Fig. 3 is the A-A cutaway view of Fig. 2 of a kind of screw propeller of the utility model;
Fig. 4 is the B-B cutaway view of Fig. 2 of a kind of screw propeller of the utility model;
Fig. 5 is the using state figure of a kind of screw propeller of the utility model.
Detailed description of the invention
Illustrate below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1 and Figure 4, a kind of screw propeller 100, comprises prop shaft 10, and it is cylindric.Prop shaft 10 be provided with multiple blade 20 outer shroud week, and to be uniformly distributed, and extended with arcuation along the outer shroud week of prop shaft 10.In the present embodiment, the quantity of blade 20 is four, and each blade 20 is all in fan-shaped.Blade 20 has upper surface 21 and lower surface 22, and upper surface 21 is be formed with aerofoil profile leading edge 23 with the first half section junction of lower surface 22; Upper surface 21 is formed with airfoil trailing edge 24 with the second half section junction of lower surface 22.
Wherein, blade 20 has blade root section 25 and blade tip section 26 along the radial direction of prop shaft 10 towards the direction division away from prop shaft 10.Blade root section 25 and blade tip section 26 are different airfoil structure, and combined along the radial direction of prop shaft 10.In the present embodiment, the upper surface 21 of blade root section 25 is formed with convex arc section 251 by aerofoil profile leading edge 23 towards airfoil trailing edge 24 direction; And convex arc section 251 extends to the airfoil trailing edge 24 of blade root section 25 by the aerofoil profile leading edge 23 of blade root section 25, and across blade root section 25.The lower surface 22 of blade root section 25 is formed with partes glabra 252 by aerofoil profile leading edge 23 towards airfoil trailing edge 24 direction, and partes glabra 252 extends to the airfoil trailing edge 24 of blade root section 25 by the aerofoil profile leading edge 23 of blade root section 25, and across blade root section 25, and being formed with the first sharp-pointed guide lug 231 in aerofoil profile leading edge 23, airfoil trailing edge 24 is formed with the second sharp-pointed guide lug 241.
The upper surface 21 of blade tip section 26 must be formed with upper convex arc section 261 by aerofoil profile leading edge 23 towards airfoil trailing edge 24 to direction, and upper convex arc section 261 extends to the airfoil trailing edge 24 of blade tip section 26 by the aerofoil profile leading edge 23 of blade tip section 26, and across blade tip section 26, the lower surface 22 of blade tip section 26 is formed with lower concave-arc part 262 by aerofoil profile leading edge 23 towards airfoil trailing edge 24 direction, and the lower surface 22 of blade tip section 26 is also formed with lower convex arc section 263 in second half section vicinity airfoil trailing edge 24 place, makes the airfoil structure of blade tip section 26 in streamline.The aerofoil section of aerofoil profile leading edge 23 amasss the aerofoil section being less than airfoil trailing edge 24 and amasss.It should be noted that, upper and lower surperficial 22 of blade 20 all connects blade root section 25 and blade tip section 26 with significantly Curvature varying, blade root section 25 is made to have round and smooth curve with surface, blade tip section 26 connection, its junction is avoided to form fitfull surface, in addition, junction between blade root section 25 and blade tip section 26 is minimum region, can reduce and have an impact to during screw propeller 100 start, allows screw propeller 100 can reach optimization start effect.
As shown in Figure 5, in actual use, screw propeller 100 is connected with engine 200 by the oblique cardan shaft 300 being located at hull bottom, to be exported by screw propeller 100 by the power of engine 200.When screw propeller 100 rotates start, the stressed low pressure of screw propeller 100 concentrates on blade root section 25 place, when making pressure go up to cause cavity collapse by the convex arc section 251 of blade root section 25 upper surface 21 and the partes glabra 252 of blade root section 25 lower surface 22, cavity can leave screw propeller 100 surface, make the surface of the unlikely strike screw propeller 100 of cavity and cause cavitation phenomenon, and then causing the surface damage of screw propeller 100.In addition, first sharp-pointed guide lug 231 of aerofoil profile leading edge 23 makes the shape at blade root section 25 edge comparatively sharp-pointed with the second sharp-pointed guide lug 241 of airfoil trailing edge 24, therefore easily there is fluid to wander about as a refugee, also easily sheet cavitation is produced, blade root section 25 place can be produced for cavitation and stablize laminar cavitation, when the tangential extension of laminar cavitation is longer, also not easily breaks on screw propeller 100 and cavitation corrosion occurs, thus can reach the effect of the Cavitation solving inclined shaft screw propeller 100.
It is worth mentioning that, the thickness of the blade tip section 26 of blade 20 is comparatively frivolous compared with blade root section 25, effectively can lower the overall weight of each blade 20, and then reduce the rotating torque of blade 20 to prop shaft 10, therefore when prop shaft 10 starts to rotate, blade 20 rotates with fast speed, and promote blade 20 make efficiency of movement.
In sum, this novel generation by blade root section stablize laminar cavitation and cavitation corrosion is not easily occurred, and promote blade by blade tip section make efficiency of movement, the Cavitation of solution inclined shaft screw propeller, and maintain high efficiency propulsion quality.
The above is only a kind of embodiment of the present utility model; it should be pointed out that to those skilled in the art, under the prerequisite not departing from the utility model creation design; can also make some similar distortion and improvement, these also should be considered as within protection domain of the present utility model.
Claims (5)
1. a screw propeller, it is characterized in that: comprise prop shaft (10), described prop shaft (10) be provided with multiple blade (20) outer shroud week, each described blade (20) comprises blade root section (25) and blade tip section (26), the upper surface of described blade root section (25) is formed with convex arc section (251), described convex arc section (251) by the aerofoil profile leading edge of described blade root section (25) extend to described blade root section (25) airfoil trailing edge and across described blade root section (25), the lower surface of described blade root section (25) is formed with partes glabra (252), and be formed with the first sharp-pointed guide lug in the aerofoil profile leading edge of described blade root section (25), the airfoil trailing edge of described blade root section (25) is formed with the second sharp-pointed guide lug, the upper surface of described blade tip section (26) is formed with convex arc section (261), described upper convex arc section (261) by the aerofoil profile leading edge of described blade tip section (26) extend to described blade tip section airfoil trailing edge and across described blade tip section, the lower surface of described blade tip section (26) is formed with lower concave-arc part (262), makes the curved airfoil structure of described blade tip section.
2. a kind of screw propeller according to claim 1, it is characterized in that: the lower surface of described blade tip section (26) is also provided with lower convex arc section (263), described lower convex arc section (263) is located at the airfoil trailing edge of the lower surface of described blade tip section (26), makes the aerofoil profile leading edge sectional area of described blade tip section (26) be less than the airfoil trailing edge sectional area of described blade tip section (26).
3. a kind of screw propeller according to claim 2, is characterized in that: described blade (20) is extended with arcuation along the outer shroud week of described prop shaft (10).
4. a kind of screw propeller according to claim 1, is characterized in that: described blade (20) was evenly distributed in the outer shroud week of described prop shaft (10).
5. a kind of screw propeller according to claim 1, is characterized in that: described blade (20) is in fan-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615274.7U CN204236757U (en) | 2014-10-22 | 2014-10-22 | A kind of screw propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615274.7U CN204236757U (en) | 2014-10-22 | 2014-10-22 | A kind of screw propeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204236757U true CN204236757U (en) | 2015-04-01 |
Family
ID=52766279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420615274.7U Expired - Fee Related CN204236757U (en) | 2014-10-22 | 2014-10-22 | A kind of screw propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204236757U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019014873A1 (en) * | 2017-07-19 | 2019-01-24 | 陆东美 | Propeller for dredger |
| WO2019019011A1 (en) * | 2017-07-25 | 2019-01-31 | 陈秋华 | Steering oar structure of dredger |
| CN110219130A (en) * | 2018-03-02 | 2019-09-10 | 青岛海尔洗衣机有限公司 | Impeller and clothes treatment device including the impeller |
-
2014
- 2014-10-22 CN CN201420615274.7U patent/CN204236757U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019014873A1 (en) * | 2017-07-19 | 2019-01-24 | 陆东美 | Propeller for dredger |
| WO2019019011A1 (en) * | 2017-07-25 | 2019-01-31 | 陈秋华 | Steering oar structure of dredger |
| CN110219130A (en) * | 2018-03-02 | 2019-09-10 | 青岛海尔洗衣机有限公司 | Impeller and clothes treatment device including the impeller |
| CN110219130B (en) * | 2018-03-02 | 2023-05-12 | 青岛海尔洗衣机有限公司 | Pulsator and laundry treating apparatus including the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20161022 |