CN114084327A - Marine propeller blade structure - Google Patents
Marine propeller blade structure Download PDFInfo
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- CN114084327A CN114084327A CN202111428557.1A CN202111428557A CN114084327A CN 114084327 A CN114084327 A CN 114084327A CN 202111428557 A CN202111428557 A CN 202111428557A CN 114084327 A CN114084327 A CN 114084327A
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- micro
- propeller
- propeller blade
- convex
- protrusions
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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
- B63H1/26—Blades
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a propeller blade structure for a ship, which comprises: the propeller blade comprises a propeller blade body, a blade body and a blade body, wherein the propeller blade body comprises a suction side and a pressure side with micro-protrusions, and a plurality of micro-protrusions are arranged on the pressure side with the micro-protrusions; the micro-convex bodies are arranged in an equidistant array along the direction from the leading edge to the trailing edge of the propeller blade. Through at the little convex body of screw paddle surface design, promote the efficiency of screw through the little modification in surface on the basis of former leaf type, further optimized former leaf type paddle in wide advancing speed within range and improved the screw and opened the water efficiency, make the thrust of screw increase, the moment of torsion reduces, the wake disturbance reduces, and the little convex body on screw paddle surface adds man-hour and easily carries out the engineering spraying.
Description
Technical Field
The invention relates to the technical field of propellers, in particular to a propeller blade structure for a ship.
Background
The propeller is a device which rotates in the air or water by means of blades and converts the rotating power of an engine into propulsive force, and can be a marine propeller which is provided with two or more blades connected with a hub, and the backward surface of each blade is a spiral surface or a surface similar to the spiral surface. The propellers are divided into a plurality of types and are widely applied, such as propellers of aircrafts and ships. The propeller blades of the existing marine propeller model and the blade appearance within a wide advancing speed coefficient range have low efficiency and poor thrust. In addition, the existing toothed propeller blades with guide edges and trailing edges of the blades are complex in shape, large in processing difficulty in actual engineering, and complex and difficult in optimization design process of geometric parameters and performance of the blades.
Disclosure of Invention
The invention provides a propeller blade structure for a ship, which aims to solve the problems of low propeller efficiency and poor thrust of a propeller blade in a wide range of a forward speed coefficient.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a marine propeller blade structure comprising: the propeller blade comprises a propeller blade body, a blade body and a blade body, wherein the propeller blade body comprises a suction side and a pressure side with micro-protrusions, and a plurality of micro-protrusions are arranged on the pressure side with the micro-protrusions; the micro-convex bodies are arranged in an equidistant array along the direction from the leading edge to the trailing edge of the propeller blade.
Furthermore, on the same projection plane, taking the rotation center O of the propeller as the center, the micro-convex bodies are arranged in concentric circles at equal intervals according to the array pitch.
Further, the microprotrusions are arranged according to a characteristic parameter microprotrusion ratio:
wherein, lambda is the micro-convex ratio, R is the propeller radius, R is the micro-convex radius, and b is the array spacing.
Further, the micro-convex ratio is less than 0.5.
Further, the radius of the propeller is 0.125m-1.0 m.
Further, the radius of the microprotrusions is 0.2mm to 1.6 mm.
Further, the array pitch is 5mm-40 mm.
Further, the micro-convex bodies are convex spheres.
The invention discloses a propeller blade structure for a ship, which improves the efficiency of a propeller by designing a micro-convex body on the surface of the propeller blade and modifying the surface of the propeller blade on the basis of an original blade shape, further optimizes the original blade shape blade in a wide advancing speed range to improve the water opening efficiency of the propeller, increases the thrust of the propeller, reduces the torque and the wake disturbance, and is easy to carry out engineering spraying when the micro-convex body on the surface of the propeller blade is processed.
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 description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a four-bladed propeller of the present invention with its pressure side having asperities;
FIG. 2 is a side view of a four-bladed propeller of the present invention with its pressure side having asperities;
FIG. 3 is a schematic view of the microprotrusion distribution and characteristic parameters;
FIG. 4 is a cutting structure diagram of a prototype paddle and an array radius cylinder;
FIG. 5 is a graph of a drive array;
FIG. 6 is a datum plane of the microprotrusion construction;
FIG. 7 is a schematic view of a microprotrusion structure;
FIG. 8 is a slightly convex propeller impeller;
FIG. 9 is a slightly convex body of the surface of a slightly convex propeller;
FIG. 10 shows the distribution of the surface mesh and the surface mesh of the micro-convex body;
FIG. 11 is a thrust coefficient variation graph;
FIG. 12 is a graph of torque coefficient variation;
FIG. 13 is a graph showing the variation of the open water efficiency of the propeller;
FIG. 14 is a surface shear resistance diagram for a propeller without asperities;
FIG. 15 is a surface shear resistance diagram for a propeller with asperities;
FIG. 16 is a graph of the frequency of flow whirl around the propeller of a prototype impeller;
FIG. 17 is a graph of flow vortex frequency around a propeller with a microprotrusion impeller.
In the figure: 1. the propeller blade comprises a propeller blade body, 2, a micro-convex body, 3, a blade section pressure side edge line, 4, a reference surface of a pressure side array curve, 5, an array curve, 6, a suction side, 7, a pressure side with the micro-convex body, 8, a fluid domain pit grid, 9 and a boundary layer grid.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
As shown in fig. 1-17, a marine propeller blade structure includes: the propeller blade comprises a propeller blade body 1, wherein the propeller blade body 1 comprises a suction side 6 and a pressure side 7 with micro-protrusions, and a plurality of micro-protrusions 2 are arranged on the pressure side 7 with the micro-protrusions; the micro-convex bodies 2 are arranged in an equidistant array along the direction from the leading edge to the trailing edge of the propeller blade.
Further, on the same projection plane, with the propeller rotation center O as the center, the micro-protrusions 2 are arranged in concentric circles at equal intervals according to the array pitch b. In this embodiment, the array pitch b is a circumferential distance, and the radius of the array curve of the micro-convex sphere is centered on the rotation center O of the propeller, so that the arrangement is favorable for the resistance distribution of the surface of the paddle and the disturbance of water flow, thereby generating the improvement in the hydrodynamic performance.
Further, the microprotrusions are arranged according to a characteristic parameter microprotrusion ratio:
wherein, lambda is the micro-convex ratio, R is the propeller radius, R is the micro-convex radius, and b is the array spacing.
Further, the micro-convex ratio is less than 0.5. Further, the radius of the propeller is 0.125m-1.0 m. Further, the radius of the microprotrusions is 0.2mm to 1.6 mm. Further, the array pitch is 5mm-40 mm. Further, the micro-convex bodies are convex spheres. In this embodiment, a four-bladed propeller with R of 0.125m is used as the target, the convex radius R is 0.2mm, the array pitch d is 5mm, and the characteristic parameter is set to a slight convex ratio of 0.01. And (3) establishing a micro-convex sphere on the pressure surface of the propeller according to each array curve 5 in sequence, wherein the sphere is embedded on the pressure surface of the propeller.
Software simulation experiment:
according to the structural characteristics of the propeller blades, three-dimensional geometric modeling is carried out in SOLIDWORKS software according to a blade section model value table of the marine propeller blades, and micro-convex bodies are designed from a leading edge to a trailing edge array on a pressure surface along section lines with different radius ratios, so that the propeller blades with high propelling efficiency are generated.
As shown in fig. 1, the three-dimensional blade geometry is performed in three-dimensional plotting software SOLIDWORKS, and the specific configuration steps are as follows: firstly, converting the coordinates of the propeller blades on an XYZ axis according to a blade section model table, and forming section space curves with different radius ratios by the coordinates through 'inserting-curve passing XYZ point'; secondly, according to each section space curve, a leaf section is formed by closing the leaf section space curve through an 'insertion-curved surface-boundary curved surface'; thirdly, forming a blade body model through lofting different blade sections; and fourthly, optimizing the shape of the propeller blade through the micro-convex ratio.
As shown in fig. 3-5, R is the microprotrusion radius, R0The propeller is characterized in that the propeller is an array curve radius of a micro-convex sphere, wherein the array curve radius of the micro-convex sphere takes a propeller rotation center O as a center, so that the arrangement is favorable for the resistance distribution of the surface of the paddle and the disturbance of water flow, and the improvement of the hydrodynamic performance is generated. Wherein, as shown in FIG. 4, the array curve is obtained by matching the original blade with R0Cutting off the cylinder to obtain a product with R0Blade section of inside diameter; as shown in FIG. 5, the pressure side edge 3 of the blade profile is then selected to construct a combined curve, and different R values are obtained0At the driven array curve 5. In this example, 10 array arc curves are formed starting from 0.2R (R is the propeller radius) and increasing by 0.08R. Selecting array curve every time arranging array surface micro-convex bodyThe line establishes a reference plane 4 that is perpendicular to the pressure side array curve (see fig. 6), the reference point being a circular arc end point in a manner that is perpendicular to the array curve on the pressure side. A sphere (see figure 7) with the radius of r as the center of a circle is established on the reference surface, a curve-driven array is adopted when the array is arranged, the array is at equal intervals, and the array interval b is kept unchanged.
As shown in fig. 2, the pressure surface of the propeller impeller has a slight convex ratio according to a characteristic parameter
A ratio of less than 0.5 is established, where R is the propeller radius, R is the microprotrusion radius, and b is the array pitch. And (4) establishing a micro-convex sphere on the pressure surface of the propeller according to each array curve in sequence, wherein the sphere is embedded on the pressure surface of the propeller. As shown in fig. 8 and 9, the suction side 6 and the pressure side 7 with the microprotrusions are disposed on both sides of the propeller blade in an array of equally spaced arcs in the leading to trailing direction to construct a microprotrusion propeller blade.
As shown in FIG. 10, during hydrodynamic research of the propeller blade with the micro-convex body, boundary layer technology is adopted to divide the mesh into a fluid domain pit mesh 8 and a boundary layer mesh 9, wherein the boundary layer first layer mesh thickness 10-5m, the number of layers is 10, the growth rate is 1.2, and in order to ensure the dimensionless Y + value requirement of the surface of the rotating blade, the Y + value at the highest flow velocity position is less than 5.
The error is less than or equal to 10 in the calculation process-6Under the requirement, parameters such as thrust, torque and the like of the propeller under different advancing speed coefficients are obtained by adopting a CFX calculation flow field. Through calculation, compared with a prototype structure, the design of the blade surface micro-convex body can further improve the open water efficiency of the propeller, the thrust is increased, and the torque is reduced.
In this embodiment, when a four-bladed propeller with R of 0.125m is used, the convex radius R is 0.2mm, and the array pitch d is 5mm, the characteristic parameter micro-convex ratio λ is 0.01. The propeller characteristics and efficiency are shown in fig. 11, 12 and 13, and it can be seen from fig. 11 that the thrust of the propeller with the microprotrusions is increased, with a maximum increase of 6.85% at full speed; in fig. 12, the torque of the propeller with the microprotrusions increases when the advance coefficient is 0.6 or less, the maximum increase is 4.24% when J is 0.1, the torque decreases when the advance coefficient is greater than 0.6, and the maximum decrease is-2.84% when J is 0.9. In fig. 13, the open-water efficiency torque of the propeller is increased at the high-speed advancing speed except that the amplitude is reduced by 1.96% at the low-advancing speed J of 0.1, and the maximum amplitude is 6.40% at the full speed.
The reason for improving the water opening efficiency of the propeller is analyzed from the surface resistance change of the propeller blades and the vortex frequency change in the flow field, and along with the increase of the wall shear resistance, the resistance generated to the flow is increased, and the consumed energy is larger. As can be seen from fig. 15, the micro-protrusions on the surface of the propeller ensure the flow smoothness of the blade surface, and the shear resistance is relieved. Meanwhile, when the propeller propels the water flow, the water reverse thrust is correspondingly reduced when the water vortex turbulence is more serious. As shown in fig. 17, the propeller microprotrusions effectively reduce the turbulence of the water flow as it passes through the propeller disk surface channels, greatly reducing the high frequency vortex region around the blades, and also moderating the flow disturbance frequency at the propeller wake.
The invention discloses a propeller blade structure for a ship, which improves the efficiency of a propeller by designing a micro-convex body on the surface of the propeller blade and modifying the surface of the propeller blade on the basis of an original blade shape, further optimizes the original blade shape blade in a wide advancing speed range to improve the water opening efficiency of the propeller, increases the thrust of the propeller, reduces the torque and the wake disturbance, and is easy to carry out engineering spraying when the micro-convex body on the surface of the propeller blade is processed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A marine propeller blade construction, comprising: the propeller blade comprises a propeller blade body (1), wherein the propeller blade body (1) comprises a suction side (6) and a pressure side (7) with micro-protrusions, and a plurality of micro-protrusions (2) are arranged on the pressure side (7) with the micro-protrusions; the micro-convex bodies (2) are arranged in an equidistant array along the direction from the leading edge to the trailing edge of the propeller blade.
2. A propeller blade structure for ships according to claim 1, wherein said micro-protrusions (2) are arranged concentrically at equal intervals in array pitch on the same projection plane with the propeller rotation center O as the center.
3. A marine propeller blade construction according to claim 1, wherein the asperities (2) are arranged according to a characteristic parameter asperity ratio:
wherein, lambda is the micro-convex ratio, R is the propeller radius, R is the micro-convex radius, and b is the array spacing.
4. A marine propeller blade construction according to claim 3, wherein the micro-relief ratio is less than 0.5.
5. A marine propeller blade construction according to claim 3, wherein the propeller radius is from 0.125m to 1.0 m.
6. A marine propeller blade construction according to claim 3, wherein the radius of the microprotrusions is from 0.2mm to 1.6 mm.
7. A marine propeller blade construction according to claim 3 wherein the array pitch is from 5mm to 40 mm.
8. The marine propeller blade structure of claim 1, wherein the asperities are raised spheres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428557.1A CN114084327A (en) | 2021-11-26 | 2021-11-26 | Marine propeller blade structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428557.1A CN114084327A (en) | 2021-11-26 | 2021-11-26 | Marine propeller blade structure |
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| Publication Number | Publication Date |
|---|---|
| CN114084327A true CN114084327A (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111428557.1A Pending CN114084327A (en) | 2021-11-26 | 2021-11-26 | Marine propeller blade structure |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1864803A (en) * | 1929-07-11 | 1932-06-28 | John M Clark | Marine and aeroplane propeller |
| GB429779A (en) * | 1932-12-23 | 1935-06-06 | Albert Victor Dear | Improved screw propeller |
| JPH05162688A (en) * | 1991-12-16 | 1993-06-29 | Mitsubishi Heavy Ind Ltd | Marine propeller with protrusion |
| JP2000265997A (en) * | 1999-01-12 | 2000-09-26 | Mitsubishi Heavy Ind Ltd | Vane type propeller fan |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| KR20150006133A (en) * | 2013-07-08 | 2015-01-16 | 현대중공업 주식회사 | Propeller for ship |
| WO2015030048A1 (en) * | 2013-09-02 | 2015-03-05 | 三菱電機株式会社 | Propeller fan, air-blowing device, and outdoor unit |
| JP3200632U (en) * | 2015-08-04 | 2015-10-29 | 阿刀田 実 | Propeller type fan driven in liquid |
| CN105366016A (en) * | 2015-12-04 | 2016-03-02 | 苏州金业船用机械厂 | High speed propeller |
| CN107074344A (en) * | 2017-01-13 | 2017-08-18 | 深圳市大疆创新科技有限公司 | Propeller, power suit and the unmanned plane of aircraft |
-
2021
- 2021-11-26 CN CN202111428557.1A patent/CN114084327A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1864803A (en) * | 1929-07-11 | 1932-06-28 | John M Clark | Marine and aeroplane propeller |
| GB429779A (en) * | 1932-12-23 | 1935-06-06 | Albert Victor Dear | Improved screw propeller |
| JPH05162688A (en) * | 1991-12-16 | 1993-06-29 | Mitsubishi Heavy Ind Ltd | Marine propeller with protrusion |
| JP2000265997A (en) * | 1999-01-12 | 2000-09-26 | Mitsubishi Heavy Ind Ltd | Vane type propeller fan |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| KR20150006133A (en) * | 2013-07-08 | 2015-01-16 | 현대중공업 주식회사 | Propeller for ship |
| WO2015030048A1 (en) * | 2013-09-02 | 2015-03-05 | 三菱電機株式会社 | Propeller fan, air-blowing device, and outdoor unit |
| JP3200632U (en) * | 2015-08-04 | 2015-10-29 | 阿刀田 実 | Propeller type fan driven in liquid |
| CN105366016A (en) * | 2015-12-04 | 2016-03-02 | 苏州金业船用机械厂 | High speed propeller |
| CN107074344A (en) * | 2017-01-13 | 2017-08-18 | 深圳市大疆创新科技有限公司 | Propeller, power suit and the unmanned plane of aircraft |
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Application publication date: 20220225 |
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