CN220682627U - Micro grid structure for improving hydrodynamic performance of propeller - Google Patents
Micro grid structure for improving hydrodynamic performance of propeller Download PDFInfo
- Publication number
- CN220682627U CN220682627U CN202322468026.6U CN202322468026U CN220682627U CN 220682627 U CN220682627 U CN 220682627U CN 202322468026 U CN202322468026 U CN 202322468026U CN 220682627 U CN220682627 U CN 220682627U
- Authority
- CN
- China
- Prior art keywords
- grid structure
- micro
- propeller
- thin walls
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000002401 inhibitory effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251730 Chondrichthyes Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a micro-grid structure for improving the hydrodynamic performance of a propeller, wherein a micro-grid structure body is arranged on the surface of a propeller blade, the micro-grid structure body comprises a plurality of transverse thin walls and a plurality of longitudinal thin walls, the transverse thin walls and the longitudinal thin walls are connected and form a plurality of unit grooves, the thicknesses of the transverse thin walls and the longitudinal thin walls are a, the groove length of the unit grooves is b, the groove depth of the unit grooves is h, the groove width of the unit grooves is s, wherein a/s is 1/25-1/20, b/s is 8-10, and h/s is 0.8-1.2. The utility model simultaneously plays roles of reducing friction resistance and inhibiting cavitation corrosion, and improves the comprehensive hydrodynamic performance of the propeller.
Description
Technical Field
The utility model relates to the technical field of ships, in particular to a micro-grid structure for improving hydrodynamic performance of a propeller.
Background
In the sailing process of the ship, the propeller needs to overcome various resistances; the efficiency of the propeller, which is lost due to frictional resistance during interaction with water, is as high as 20%, resulting in unnecessary energy consumption. On the other hand, the propeller also causes cavitation during interaction with water due to the decrease in blade surface pressure. When cavitation collapses, the cavitation can corrode the blades, thereby shortening the service life of the propeller and being unfavorable for noise reduction and ship stealth.
The existing method for improving hydrodynamic performance by modifying the surface of a propeller is mainly based on a bionics idea, such as adding a structure similar to shark skin on the surface of a blade. These grooved non-smooth surfaces are beneficial to inhibiting the lateral migration of vortices on the viscous base layer and are the primary factors inducing drag reduction. Also, related researchers can simplify the groove structure into tiny pits and bulges, and can achieve the effect similar to drag reduction and speed increase.
However, the prior art has the following problems:
(1) The rotating mechanism, the bracket and the like are required to be designed, so that the equipment structure is complex, the processing cost is high, and meanwhile, the stability in actual sailing is difficult to ensure;
(2) The tiny units are ground at the blade root part, so that the strength of the propeller can be reduced to a certain extent, and the service life of the propeller is shortened especially under the heavy-load high-speed working condition;
(3) The effect on cavitation is not considered for drag reduction only by the propeller.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a micro-grid structure for improving the hydrodynamic performance of a propeller.
The utility model solves the technical problems by the following technical scheme:
the micro grid structure for improving the hydrodynamic performance of the propeller is characterized in that a micro grid structure body is arranged on the surface of a propeller blade, the micro grid structure body comprises a plurality of transverse thin walls and a plurality of longitudinal thin walls, the transverse thin walls and the longitudinal thin walls are connected to form a plurality of unit grooves, the thicknesses of the transverse thin walls and the longitudinal thin walls are a, the groove length of the unit grooves is b, the groove depth of the unit grooves is h, the groove width of the unit grooves is s, wherein a/s is 1/25-1/20, b/s is 8-10, and h/s is 0.8-1.2.
The distance between adjacent longitudinal thin walls is the same; the distance between adjacent longitudinal thin walls is the groove length of the unit groove.
The distance between adjacent transverse thin walls is the same; the distance between adjacent transverse thin walls is the groove width of the unit groove.
The heights of the transverse thin wall and the longitudinal thin wall are the same, and the height of the transverse thin wall or the longitudinal thin wall is the groove depth of the unit groove.
The cell width of the cell is not more than 1mm.
The longitudinal thin wall is fixedly connected with the transverse thin wall.
The transverse thin wall and the longitudinal thin wall are fixedly connected to the surface of the propeller blade.
The transverse thin wall is perpendicular to the longitudinal thin wall, and the unit groove is rectangular.
The two ends of the propeller blade are respectively provided with a blade root and a blade tip; the micro-grid structure is arranged in the area between the tip and the middle of the propeller blade.
Preferably, the micro-grid structure is arranged in one third of the area of the propeller blade around the tip of the blade.
The utility model has the beneficial effects that: the micro-grid structure is additionally arranged at the upper half part of the conventional propeller blade, so that the effects of reducing friction resistance and inhibiting cavitation corrosion can be achieved, and the comprehensive hydrodynamic performance of the propeller is improved. The utility model does not depend on complicated mechanisms, thereby reducing the cost; meanwhile, according to structural parameters, the micro-grid is highly controllable and repeatable in processing, and is beneficial to technical popularization; the micro grid structure body is arranged on the upper 1/3 part of the propeller blade, the root is not involved, and the strength of the propeller blade can be ensured; the effects of reducing drag and cavitation corrosion can be achieved at the same time.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of the present utility model.
Fig. 2 is a top view of a micro-grid structure according to a preferred embodiment of the present utility model.
Fig. 3 is a side view of a micro-grid structure according to a preferred embodiment of the present utility model.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
As shown in fig. 1, 2 and 3, a micro-grid structure for improving hydrodynamic performance of a propeller is provided, and a micro-grid structure body 20 is provided on the surface of a propeller blade 10.
The micro-grid structure 20 comprises a plurality of transverse thin walls 21 and a plurality of longitudinal thin walls 22, and the transverse thin walls 21 and the longitudinal thin walls 22 are connected and form a plurality of unit grooves 30.
The thickness of the transverse thin wall and the longitudinal thin wall is a, the groove length of the unit groove is b, the groove depth of the unit groove is h, and the groove width of the unit groove is s, wherein a/s is 1/25-1/20, b/s is 8-10, and h/s is 0.8-1.2.
The distance between adjacent longitudinal thin walls 22 is the same; the distance between adjacent longitudinal thin walls 22 is the groove length of the cell groove.
The distance between adjacent transverse thin walls 21 is the same; the distance between adjacent transverse thin walls 21 is the groove width of the cell groove.
The height of the transverse thin wall 21 is the same as that of the longitudinal thin wall 22, and the height of the transverse thin wall 21 or the longitudinal thin wall 22 is the groove depth of the unit groove.
The cell width of the cell is not more than 1mm.
The longitudinal thin wall 22 and the transverse thin wall 21 are fixedly connected with each other. The transverse thin wall 21 and the longitudinal thin wall 22 are fixedly connected to the surface of the propeller blade 10.
The transverse thin walls 21 are parallel to each other; the longitudinal thin walls 22 are parallel to each other. The transverse thin wall 21 is perpendicular to the longitudinal thin wall 22, and the unit groove is rectangular.
The two ends of the propeller blade 10 are respectively provided with a blade root 11 and a blade tip 12; the micro-grid structure 20 is disposed in the region between the tip 12 and the middle of the propeller blade.
Preferably, the micro-grid structure 20 is disposed in one third of the area of the propeller blade slightly surrounding the blade, as indicated by the dashed box in fig. 1.
The unit cells can suppress lateral movement of the vortex during the flow of the fluid along the channel to reduce resistance. Although the thinner the groove is, the better the drag reduction is, but the strength is reduced and the phenomenon of bending occurs, so that the expansion of vortex is caused, and the drag reduction is not facilitated; therefore, the a/s is controlled to be between 1/25 and 1/20, and the structural strength is ensured while the resistance is reduced.
On the other hand, each unit groove can stably lock air, and then the resident air is utilized to repel bubbles approaching to the wall surface, so that corrosion of the bubbles on the surface of the propeller blade is reduced. To ensure adequate cavitation resistance, the cell grid size should not be too large, so that b/s is maintained between 8 and 10 and h/s is maintained between 0.8 and 1.2.
The utility model has the beneficial effects that:
(1) Does not depend on complicated mechanisms, and reduces the cost. Meanwhile, according to structural parameters, the micro-grid is highly controllable and repeatable in processing, and is beneficial to technical popularization.
(2) The micro grid structure body is arranged on the upper 1/3 part of the propeller blade, the root is not involved, and the strength of the propeller blade can be ensured;
(3) And simultaneously, the effects of reducing drag and cavitation corrosion are achieved.
The micro-grid structure is additionally arranged at the upper half part of the conventional propeller blade, so that the effects of reducing friction resistance and inhibiting cavitation corrosion can be achieved, and the comprehensive hydrodynamic performance of the propeller is improved.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (10)
1. The micro grid structure is characterized in that the surface of a propeller blade is provided with a micro grid structure body, the micro grid structure body comprises a plurality of transverse thin walls and a plurality of longitudinal thin walls, the transverse thin walls and the longitudinal thin walls are connected to form a plurality of unit grooves, the thicknesses of the transverse thin walls and the longitudinal thin walls are all a, the groove length of the unit grooves is b, the groove depth of the unit grooves is h, the groove width of the unit grooves is s, wherein a/s is 1/25-1/20, b/s is 8-10, and h/s is 0.8-1.2.
2. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the distances between adjacent longitudinal thin walls are the same; the distance between adjacent longitudinal thin walls is the groove length of the unit groove.
3. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the distances between adjacent lateral thin walls are the same; the distance between adjacent transverse thin walls is the groove width of the unit groove.
4. The micro grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the heights of the transverse thin wall and the longitudinal thin wall are the same, and the height of the transverse thin wall or the longitudinal thin wall is the groove depth of the unit groove.
5. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the groove width of the unit groove is not more than 1mm.
6. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the longitudinal thin wall and the transverse thin wall are fixedly connected.
7. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the transverse thin wall and the longitudinal thin wall are fixedly connected to the surface of the propeller blade.
8. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the transverse thin wall is perpendicular to the longitudinal thin wall, and the cell grooves are rectangular.
9. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 1, wherein the two ends of the propeller blade are respectively a blade root and a blade tip; the micro-grid structure is arranged in the area between the tip and the middle of the propeller blade.
10. The micro-grid structure for improving the hydrodynamic performance of a propeller according to claim 9, wherein the micro-grid structure is provided in one third of the area of the propeller blade around the tip of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322468026.6U CN220682627U (en) | 2023-09-12 | 2023-09-12 | Micro grid structure for improving hydrodynamic performance of propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322468026.6U CN220682627U (en) | 2023-09-12 | 2023-09-12 | Micro grid structure for improving hydrodynamic performance of propeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220682627U true CN220682627U (en) | 2024-03-29 |
Family
ID=90374865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322468026.6U Active CN220682627U (en) | 2023-09-12 | 2023-09-12 | Micro grid structure for improving hydrodynamic performance of propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220682627U (en) |
-
2023
- 2023-09-12 CN CN202322468026.6U patent/CN220682627U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1886015B1 (en) | Power generating apparatus with water turbine with bi-symmetric airfoil | |
| EP0236409B1 (en) | Foil | |
| CN101492090B (en) | Posterior edge separation vortex high-lift force high speed laminar flow airfoil | |
| KR20030029349A (en) | Trimaran type wig effect ship with small waterplane area | |
| CN103910023B (en) | A kind of hydrofoil | |
| CN102131696A (en) | Wig vehicle excluding horizontal stabilizer | |
| CN104613056A (en) | Bionic drag reduction surface for herringbone structure | |
| CN205186502U (en) | Energy -conserving distortion rudder | |
| CN220682627U (en) | Micro grid structure for improving hydrodynamic performance of propeller | |
| CN202244050U (en) | Reaction fin in front of oar | |
| CN117002712A (en) | Micro grid structure for improving hydrodynamic performance of propeller | |
| KR102144276B1 (en) | Ship with small duct and method for assessing application of small duct on ship | |
| CN102381463A (en) | Reaction fin in front of propeller | |
| CN109436183B (en) | Bat type T-shaped high lift hydrofoil device | |
| CN203946235U (en) | A kind of low-resistance boat hull structure | |
| CN2652812Y (en) | Resistance reducing micro bubble generator | |
| CN212290292U (en) | Rotatable rudder with bulge front edge for ship | |
| KR101259704B1 (en) | Propeller Blade for Ship | |
| CN204916136U (en) | Slightly portion non -linear flap marine propeller | |
| CN202016565U (en) | Structure for improving output efficiency and reducing noise of spiral propeller | |
| Inukai | A development of a propeller with backward tip raked fin | |
| AU2017265114A1 (en) | Section profiles for planing hydrofoils and hydrofoils operating close to a free water surface | |
| CN103910024A (en) | Hydrofoil ship | |
| CN111907685A (en) | Concave-convex ship rudder with different cross section thicknesses | |
| CN203946270U (en) | A kind of marine rudder of convex-concave surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |