CN218858666U - Ship and front guide wheel thereof - Google Patents
Ship and front guide wheel thereof Download PDFInfo
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- CN218858666U CN218858666U CN202222804269.8U CN202222804269U CN218858666U CN 218858666 U CN218858666 U CN 218858666U CN 202222804269 U CN202222804269 U CN 202222804269U CN 218858666 U CN218858666 U CN 218858666U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The utility model discloses a boats and ships and leading guide pulley thereof, leading guide pulley include curved pipe, and the equipartition has a plurality of blades on the inner wall of pipe, the one end of every blade all fixed connection in the inner wall of pipe. The utility model discloses a leading guide pulley can effectively avoid the blade to take place cavitation erosion, reduce the cavitation noise, reduce hull bottom vibrations etc. and then effectively avoid the fatigue damage of boats and ships body structure, guarantee the reliability of boats and ships work to energy-conserving effect is obvious.
Description
Technical Field
The utility model relates to a boats and ships technical field especially relates to a boats and ships and leading guide pulley thereof.
Background
The international shipping market is continuously low, and in addition, all countries have stricter requirements on ship emission, green intelligent ships become the hot spot topic in the circle, the ship resistance performance can also adopt an energy-saving accessory body besides profile optimization, and the energy-saving accessory body with excellent design can sometimes reach 20% drag reduction rate, so that the ship energy consumption is effectively reduced, and meanwhile, the energy-saving accessory body has the characteristics of simple and firm structure, less investment and large return, and is favored by a lot of ships.
The front guide wheel is a ship energy-saving device which can be arranged at the tail of a large ship and in front of a propeller.
However, the water flow condition at the tail part of the ship is complex, the accompanying flow of the ship body at the position is large, and the propeller and the attachment of the front guide wheel are easy to generate cavitation due to the accompanying flow. Meanwhile, the diameter of the front guide wheel is generally the same as that of the propeller and is close to the bottom plate of the ship, and if the device has a serious cavitation problem, the phenomena of cavitation erosion, cavitation noise, large vibration of the bottom of the ship and the like can occur, so that the fatigue damage of the structure of the ship body is caused.
Disclosure of Invention
In order to overcome the defects, the utility model provides a first technical problem who solves provides a leading guide pulley, can effectively avoid the blade to take place cavitation erosion, reduce cavitation noise, reduce hull bottom vibrations etc. and then effectively avoid causing the fatigue damage of boats and ships body structure, guarantees the reliability of boats and ships work.
The utility model discloses a leading guide pulley, including curved pipe, the equipartition has a plurality of blades, every on the inner wall of pipe the equal fixed connection of one end of blade in the inner wall of pipe.
Further, each blade is vertically and fixedly connected to the inner wall of the conduit.
Further, the conduit has two ends, a first end and a second end, respectively, the first end having an inner diameter greater than the inner diameter of the second end.
Furthermore, the upper end surface of the blade, the lower end surface of the blade and the cross section of the blade all comprise a first smooth transition arc section, a straight section and a second smooth transition arc section which are sequentially connected end to end.
Further, along the length direction of the blade, an M1 cross section, an M2 cross section, an M3 cross section and an M4 cross section are sequentially arranged on the blade, and the M1 cross section, the M2 cross section, the M3 cross section and the M4 cross section divide the blade into five equal parts along the length direction; the projections of the upper end surface and the lower end surface along the length direction of the upper end surface and the lower end surface are completely overlapped, the upper end surface is defined as a reference surface, and a straight line segment of the reference surface is defined as a straight line segment of the reference surface; a straight-line segment of the M1 cross section is defined as a straight-line segment of the M1 cross section, an included angle between the straight-line segment of the M1 cross section and the straight-line segment of the reference surface is alpha, and the straight-line segment of the M1 cross section is positioned above the straight-line segment of the reference surface; a straight line section of the M2 cross section is defined as a straight line section of the M2 cross section, an included angle between the straight line section of the M2 cross section and the straight line section of the reference surface is beta, and the straight line section of the M2 cross section is positioned below the straight line section of the reference surface; a straight line section of the M3 cross section is defined as a straight line section of the M3 cross section, an included angle between the straight line section of the M3 cross section and the straight line section of the reference surface is gamma, and the straight line section of the M3 cross section is positioned below the straight line section of the reference surface; the straight line section of the M4 cross section is defined as a straight line section of the M4 cross section, an included angle between the straight line section of the M4 cross section and the straight line section of the reference surface is delta, and the straight line section of the M4 cross section is located below the straight line section of the reference surface.
Further, said α is 2 °; beta is 3 degrees; gamma is 4 °; the δ is 3 °.
Further, the blades are provided with five.
Based on a general inventive concept, the utility model aims to solve the second technical problem that a boats and ships are provided, can effectively avoid the blade to take place cavitation denudation, reduce cavitation noise, reduce hull bottom vibrations etc. and then effectively avoid causing the fatigue damage of boats and ships body structure, guarantee the reliability of boats and ships work.
The ship comprises a ship body, wherein the ship body is provided with the front guide wheel.
Furthermore, the ship body is provided with a stern shaft, and the front guide wheel is arranged on the stern shaft; the other end of the blade is fixedly connected to the peripheral surface of the stern shaft.
Further, the first end is disposed toward the boat body.
After the technical scheme is adopted, the beneficial effects of the utility model are that, leading guide pulley includes curved pipe, and the equipartition has a plurality of blades on the inner wall of pipe, the one end of every blade all fixed connection in the inner wall of pipe. The utility model discloses a leading guide pulley can effectively avoid the blade to take place cavitation erosion, reduce the cavitation noise, reduce hull bottom vibrations etc. and then effectively avoid the fatigue damage of boats and ships body structure, guarantee the reliability of boats and ships work to energy-conserving effect is obvious.
Drawings
Fig. 1 is a perspective view of a front guide wheel of the present invention;
FIG. 2 is a schematic view of the front guide wheel of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is an enlarged perspective view of the first vane of FIG. 2;
FIG. 5 is a schematic structural view of the first blade of FIG. 2;
FIG. 6 is a schematic cross-sectional view of point M1 of FIG. 5;
FIG. 7 is a schematic cross-sectional view of point M2 of FIG. 5;
FIG. 8 is a schematic cross-sectional view of point M3 of FIG. 5;
FIG. 9 is a schematic diagram of the cross-section at point M4 in FIG. 5;
FIG. 10 is a right side view of FIG. 5;
fig. 11 is a schematic structural view of the connection between the front guide wheel and the stern shaft of the present invention;
in the figure: 1. a conduit; 11. a first end portion; 12. a second end portion; 2. a first blade; 21. a first blade upper end surface; 22. m1 cross section; 221. m1, a first smooth transition arc section of the cross section; 222. m1, a straight section of the cross section; 223. m1, a second smooth transition arc-shaped section of the cross section; 23. m2 cross section; 231. a first smooth transition arc segment of the M2 cross section; 232. m2 cross section straight line segment; 233. a second smooth transition arc segment of the M2 cross section; 24. m3 cross section; 241. m3, a first smooth transition arc section of the cross section; 242. m3, a straight section of the cross section; 243. m3, a second smooth transition arc-shaped section of the cross section; 25. m4 cross section; 251. m4, a first smooth transition arc section of the cross section; 252. m4 cross section straight line segment; 253. a second smooth transition arc segment of the M4 cross section; 3. a second blade; 4. a third blade; 5. a fourth blade; 6. a fifth blade; 7. a stern shaft.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
The first embodiment is as follows:
combine fig. 1, fig. 2 and fig. 3 to show jointly, the utility model discloses a leading guide pulley, it includes curved pipe 1, and the equipartition has a plurality of blades on pipe 1's the inner wall, and the one end of every blade is all fixed connection on pipe 1's inner wall. In the present embodiment, preferably, five blades are adopted, and the five blades have the same structure, and are respectively a first blade 2, a second blade 3, a third blade 4, a fourth blade 5, and a fifth blade 6; the first blade 2, the second blade 3, the third blade 4, the fourth blade 5, and the fifth blade 6 are sequentially arranged along the inner wall of the guide duct 1.
Further preferably, the first blade 2, the second blade 3, the third blade 4, the fourth blade 5 and the fifth blade 6 are all vertically and fixedly connected to the inner wall of the conduit 1.
The conduit 1 has two ends, a first end 11 and a second end 12, the first end 11 having an inner diameter greater than the inner diameter of the second end 12. The inner diameter of the first end portion is preferably twice the inner diameter of the second end portion.
As shown in fig. 1, 4, 5, 6, and 10 in common, the first blade 2, the second blade 3, the third blade 4, the fourth blade 5, and the fifth blade 6 have the same configuration, and the configuration of the first blade 2 will be described in detail.
The upper end surface 21 of the first blade 2, the lower end surface of the first blade and the cross section of the first blade 2 all comprise a first smooth transition arc section, a straight section and a second smooth transition arc section which are sequentially connected end to end.
Along the length direction of the first blade 2, an M1 cross section 22, an M2 cross section 23, an M3 cross section 24 and an M4 cross section 25 are sequentially arranged on the first blade 2, and the M1 cross section 22, the M2 cross section 23, the M3 cross section 24 and the M4 cross section 25 divide the first blade 2 into five equal parts along the length direction; the projection of the upper end surface 21 of the first blade and the projection of the lower end surface of the first blade along the length direction are completely overlapped, the upper end surface 21 of the first blade is defined as a datum plane, and the straight line segment of the datum plane is defined as the straight line segment of the datum plane.
As shown in fig. 1, 4, 5, 7, and 10, the M2 cross-section 23 includes a first rounded transition arc 231 of the M2 cross-section, a straight line 232 of the M2 cross-section, and a second rounded transition arc 233 of the M2 cross-section, which are connected end to end. An included angle between the M2 cross section straight line segment 232 and the reference plane straight line segment is β, and the M2 cross section straight line segment 232 is located below the reference plane straight line segment. β is preferably 3 °.
As shown in conjunction with fig. 1, 4, 5, 8, and 10, the M3 cross-section 24 includes a first M3 cross-section rounded transition arc 241, a straight M3 cross-section 242, and a second M3 cross-section rounded transition arc 243, connected end-to-end. An included angle between the M3 cross section straight line segment 242 and the reference plane straight line segment is gamma, and the M3 cross section straight line segment 242 is located below the reference plane straight line segment; γ is preferably 4 °.
As shown in conjunction with fig. 1, 4, 5, 9, and 10, the M4 cross-section 25 includes a first rounded transition arc 251 of the M4 cross-section, a straight section 252 of the M4 cross-section, and a second rounded transition arc 253 of the M4 cross-section, connected end to end in series. The included angle between the M4 cross section straight line section 252 and the reference plane straight line section is delta, and the M4 cross section straight line section 252 is located below the reference plane straight line section. δ is preferably 3 °.
The problem that the velocity field distribution at the rear part of the ship is uneven is fully considered by the front guide wheel, and the surface cavitation of the blade is avoided; meanwhile, the five blades and the inner wall of the conduit 1 form a symmetrical structure, so that the forward benefits of energy conservation and resistance reduction are further improved.
According to the ship straight-sailing wake flow measurement, on the basis of fully considering the rotating speed and the distribution characteristics in the wake flow, the pressure distribution condition on the surface of each blade can be effectively improved through the structure and the reasonable arrangement mode of the five blades in the embodiment, the cavitation area of each blade is reduced, the cavitation erosion of each blade is inhibited, and the damage to the structure of a ship body is avoided.
The second embodiment:
combine figure 1 and figure 11 to show jointly, the utility model also discloses a boats and ships, it includes the boats and ships body (not shown in the figure), is provided with the leading guide pulley of embodiment one on the boats and ships body.
The ship body is also provided with a stern shaft 7, and a front guide wheel is arranged on the stern shaft 7; the other ends of the first blade 2, the second blade 3, the third blade 4, the fourth blade 5 and the fifth blade 6 are fixedly connected with the peripheral surface of the stern shaft 7. The other ends of the first blade 2, the second blade 3, the third blade 4, the fourth blade 5, and the fifth blade 6 are preferably fixedly connected to the outer peripheral surface of the stern shaft 7 by welding.
The first end 11 of the conduit 1 has a larger inner diameter than the second end 12 and the first end 11 is arranged towards the vessel's body. The structure and arrangement of the duct 1 can accelerate the forward flow of the oar and generate certain thrust, and the problem of flow separation at the stern is avoided or reduced.
The utility model discloses a leading guide pulley is when installing on the stern axle 7 of boats and ships body, and simple structure is firm, and simple process need not extra maintenance work.
The utility model discloses an energy-conserving effect of leading guide pulley is obvious, and through experimental verification, can bring 15% drag reduction income to fertile large ship of low-speed.
The technical features (such as the first blade, the second blade, the third blade, the fourth blade, the fifth blade, the first end portion, the second end portion, the upper end surface of the first blade, the first smooth transition arc-shaped section of the cross section M1, the second smooth transition arc-shaped section of the cross section M1, the first smooth transition arc-shaped section of the cross section M2, the second smooth transition arc-shaped section of the cross section M2, the first smooth transition arc-shaped section of the cross section M3, the second smooth transition arc-shaped section of the cross section M3, the first smooth transition arc-shaped section of the cross section M4, the second smooth transition arc-shaped section of the cross section M4, etc.) referred to in this specification are only for distinguishing the technical features, and do not represent the position relationship, the installation sequence, the working sequence, etc. among the technical features.
In the description of the present specification, it is to be understood that the orientations or positional relationships described in the terms "first blade upper end surface", "first blade lower end surface", "inner wall", "above", "below", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (9)
1. The front guide wheel is characterized by comprising an arc-shaped guide pipe, wherein a plurality of blades are uniformly distributed on the inner wall of the guide pipe, and one end of each blade is fixedly connected to the inner wall of the guide pipe;
the conduit has two ends, a first end and a second end, respectively, the first end having an inner diameter greater than the inner diameter of the second end.
2. The front guide wheel as set forth in claim 1, wherein each of said blades is vertically fixedly attached to an inner wall of said guide duct.
3. The front guide wheel as claimed in claim 1, wherein the upper end surface of the vane, the lower end surface of the vane, and the cross section of the vane comprise a first smoothly-transiting arc section, a straight section, and a second smoothly-transiting arc section sequentially connected end to end.
4. The front guide wheel as claimed in claim 3, wherein along the length direction of the blade, the blade is provided with an M1 cross section, an M2 cross section, an M3 cross section and an M4 cross section in sequence, and the M1 cross section, the M2 cross section, the M3 cross section and the M4 cross section divide the blade into five equal parts along the length direction; the projections of the upper end surface and the lower end surface along the length direction of the upper end surface and the lower end surface are completely overlapped, the upper end surface is defined as a reference surface, and a straight line segment of the reference surface is defined as a straight line segment of the reference surface; a straight line section of the M1 cross section is defined as a straight line section of the M1 cross section, an included angle between the straight line section of the M1 cross section and the straight line section of the reference surface is alpha, and the straight line section of the M1 cross section is positioned above the straight line section of the reference surface; the straight-line section of the M2 cross section is defined as a straight-line section of the M2 cross section, an included angle between the straight-line section of the M2 cross section and the straight-line section of the reference surface is beta, and the straight-line section of the M2 cross section is located below the straight-line section of the reference surface; a straight-line segment of the M3 cross section is defined as a straight-line segment of the M3 cross section, an included angle between the straight-line segment of the M3 cross section and the straight-line segment of the reference surface is gamma, and the straight-line segment of the M3 cross section is positioned below the straight-line segment of the reference surface; the straight line section of the M4 cross section is defined as a straight line section of the M4 cross section, an included angle between the straight line section of the M4 cross section and the straight line section of the reference surface is delta, and the straight line section of the M4 cross section is located below the straight line section of the reference surface.
5. The jockey wheel of claim 4, wherein a is 2 °; beta is 3 °; gamma is 4 °; the δ is 3 °.
6. The front idler of claim 1, wherein said vanes are provided in five.
7. A ship comprising a ship body provided with a front guide wheel as claimed in any one of claims 1 to 6.
8. The ship of claim 7, wherein the ship body is provided with a stern shaft, and the front guide wheel is mounted on the stern shaft; the other end of the blade is fixedly connected to the peripheral surface of the stern shaft.
9. The vessel of claim 8, wherein the first end is disposed toward the vessel body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222804269.8U CN218858666U (en) | 2022-10-24 | 2022-10-24 | Ship and front guide wheel thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222804269.8U CN218858666U (en) | 2022-10-24 | 2022-10-24 | Ship and front guide wheel thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218858666U true CN218858666U (en) | 2023-04-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222804269.8U Active CN218858666U (en) | 2022-10-24 | 2022-10-24 | Ship and front guide wheel thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218858666U (en) |
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2022
- 2022-10-24 CN CN202222804269.8U patent/CN218858666U/en active Active
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