CN110937091B - Bionic boosting device for ship - Google Patents
Bionic boosting device for ship Download PDFInfo
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- CN110937091B CN110937091B CN201911257214.6A CN201911257214A CN110937091B CN 110937091 B CN110937091 B CN 110937091B CN 201911257214 A CN201911257214 A CN 201911257214A CN 110937091 B CN110937091 B CN 110937091B
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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
- B63H1/28—Other means for improving propeller efficiency
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- Combustion & Propulsion (AREA)
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Abstract
The invention relates to a bionic boosting device for a ship, and belongs to the technical field of ship propulsion. The propeller comprises a boosting impeller, wherein the boosting impeller is coaxial with a propeller and can rotate freely, and each blade of the boosting impeller and the surface of the propeller disk form an inclination angle of 4 degrees; the impeller guide edge part is of a concave-convex front edge structure, the concave-convex front edge structure is a concave-convex knot, and the projection curve of the convex node of the impeller propeller section and the turbine section blade guide edge is a sine curve. The invention imitates the convex-concave nodes of the pectoral fins of the whale, can absorb and convert the wake energy of the propeller to a greater extent, delays boundary separation, has larger blade area and generates larger additional thrust; meanwhile, the installation is convenient, the installation of a new ship and the transformation of an old ship are convenient, the energy-saving effect is obvious, the cost is low, and the application prospect is wide.
Description
Technical Field
The invention relates to a bionic boosting device for a ship, and belongs to the technical field of ship propulsion.
Background
With the increasing demand of the international maritime organization for the EEDI and the long-term development of the operation of ships, the ship energy-saving technology is widely concerned and continuously developed, and a great deal of research is carried out on the bionics and is applied to the ship propulsion technology so as to further improve the hydrodynamic performance of the propeller and the additional energy-saving device thereof.
The ship propulsion water power additional device is provided with a boosting impeller, a preposed guide pipe, a compensation guide pipe, a hub cap fin, a reaction rudder and the like. The boosting impeller is arranged behind the paddle, adjusts a tail pressure field and recovers circumferential rotation energy of a wake flow to generate certain additional thrust. The wake flow rotating behind the propeller drives the turbine shaped blades to rotate, and the wing blades outside the propeller diameter convert the rotational energy in the wake area into additional thrust.
Disclosure of Invention
The invention aims to provide a bionic boosting device for a ship, which aims to improve the hydrodynamic performance of a propeller and an additional energy-saving device thereof.
The purpose of the invention is realized as follows: a bionic boosting device for a ship comprises a boosting impeller, wherein the boosting impeller is coaxial with a propeller and can rotate freely, and each blade of the boosting impeller and the surface of the propeller are inclined at an angle of 4 degrees; the guide edge part of the boosting impeller is of a concave-convex front edge structure, and the guide edge of the boosting impeller comprises a guide edge of a turbine-shaped blade of a turbine section of the boosting impeller, namely a guide edge of one side of the turbine-shaped blade, which is firstly contacted with the water surface during forward rotation, and a guide edge of a blade of a propeller section of the boosting impeller; the boost blade tangent plane is the airfoil tangent plane shape, and unsmooth leading edge structure includes unsmooth node, and adjacent protruding node junction forms sunken node, and boost impeller propeller section protruding node projection line is the sinusoidal, and the expression is
B is the blade width of the propeller section impeller at the node, and the value range of x is (0, pi); the turbo-impeller turbine section turbine-shaped blade is a vertical blade, the blade has 9 convex nodes, the projection line of each convex node is a sine curve, and the expression of the projection line of each convex node is
b is the width of the vertical blade of the turbine section, and x is in the value range of (0, pi).
The invention also includes such structural features:
1. the propeller-shaped blade guide edge of the boosting impeller propeller section has the same protruding degree with the concave-convex nodules, the size of the propeller-shaped blade guide edge is related to the blade width of the impeller at the position of the propeller-shaped blade guide edge, the protruding node at the middle of the guide edge is largest, the protruding node is gradually reduced towards two sides, and the blade guide edge is smoothly transited to the blade tip and the blades of the turbine section.
2. The other end of the convex node of the turbine section is smoothly transited to the hub shaft part.
3. The shape of the turbine of the boosting impeller turbine section is vertical to the blade width and is basically unchanged, the sizes of the guide edge concave-convex nodules are the same, and the guide edge concave-convex nodules are in torsional smooth transition with the connecting end part of the hub shaft.
4. The number of the convex nodes is 15, the whole arrangement is divided into a propeller section and a turbine section, and 6 convex nodes are arranged on the propeller-shaped blade guide edge of the impeller propeller section, and the shapes and the convex degrees of the convex nodes are the same and the sizes of the convex nodes are different; the turbine section turbine shape is vertical to the guide edge of the blade and is provided with 9 convex nodes which are same in shape and size.
Compared with the prior art, the invention has the beneficial effects that: the bionic boosting impeller of the ship simulates a pectoral fin concave-convex knot of a whale with a sitting head; the blades of the boosting impeller turbine section are designed to be of a concave-convex front edge structure, so that the lift force can be improved, the resistance can be reduced, and the stall can be delayed; meanwhile, under the condition that each blade and a propeller disc form an inclination angle of 4 degrees, the propeller wake flow comes to the wing shape of the blade of the boosting impeller at a small attack angle, and under the condition of adopting the design of convex nodes with different convex degrees, the propeller wake flow shows more excellent hydrodynamic performance, and the propeller wake flow energy is absorbed and converted to a greater extent. The blades of the propeller section of the boosting impeller are designed in a concave-convex front edge structure, so that the boundary separation is delayed, the blade area is larger, and the additional thrust is generated. The boosting impeller is convenient to install, convenient to install on a new ship and transform on an old ship, remarkable in energy-saving effect and capable of reducing cost.
Drawings
FIG. 1 is a profile view of a single blade of the booster impeller of the present invention;
FIG. 2 is a cross-sectional view of an impeller blade with leading edge portions at a "concave pitch" and a "convex pitch";
fig. 3 is a plan view of a single blade of the booster impeller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in the attached drawings, fig. 1 is a profile view of a single blade of a boosting impeller of the invention, wherein 1 is an impeller propeller section, 2 is a vertical blade section of an impeller turbine, 3 is a convex node, and 4 is a common impeller guide edge; FIG. 2 is a sectional view of an impeller blade at a "concave node" and a "convex node" of a leading edge portion, wherein a is a sectional view of a concave portion, b is a sectional view of a convex portion, 5 and 6 are both blade widths, and 7 is a convex height of a node; fig. 3 is a plan view of a single blade of the booster impeller, 8 being horizontal and 9 being an inclination angle.
With reference to fig. 1 and 2, the invention relates to a ship propulsion hydrodynamic force additional energy-saving device, in particular to a boosting impeller; the impeller is novel in that a protruding structure of the front edge of the pectoral fin of a whale head is simulated on a concave-convex front edge structure of a guide edge of a boosting impeller. The boosting impeller is coaxial with the propeller and can rotate freely, and blades of the boosting impeller and the surface of the propeller disc are in a certain equal inclination angle; the turbine-shaped blade guide edge (i.e. the edge which is firstly contacted with the water surface when the vehicle rotates) of the impeller turbine section and the blade guide edge of the impeller propeller section are both of concave-convex front edge structures, and the blade tangent plane is in the shape of an airfoil tangent plane. The impeller blade width related front edge structure with the concave-convex size and the position of the concave-convex size comprises concave-convex nodules, and concave nodes are formed at the joints of the adjacent convex nodes. The propeller section of the boosting impeller has 6 convex nodes, the projection line of each convex node is a sine curve, and the expression is
The maximum height of the convex node is B/10 or B/10, B is the blade width of the propeller section impeller at the node, and x has a value range of (0, pi). The turbo-impeller turbine section turbine-shaped blade is a vertical blade, the blade has 9 convex nodes, the projection line of each convex node is a sine curve, and the expression of the projection line of each convex node is
b is the width of the vertical blade of the turbine section, and x is in the value range of (0, pi).
The concave-convex front edge structure consists of 15 concave-convex nodules with similar shapes and different sizes. The method comprises the following steps: the arrangement condition of the convex nodes on the guide edge of the impeller is as follows: the total number of the convex nodes is 15, the arrangement is totally divided into two parts of a propeller section and a turbine section, and the number of the propeller sections is 6, the shapes and the convex degrees of the propeller sections are the same, and the sizes of the propeller sections are different; the number of the turbine sections is 9, and the shapes and the sizes of the turbine sections are the same. The convex node at one end of the boosting impeller propeller section smoothly transits to a blade tip, the other end of the boosting impeller propeller section smoothly connects with the convex node at the end of the turbine section, and the other end of the convex node of the turbine section smoothly transits to the hub shaft part.
The propeller-shaped blade guide edge of the propeller section of the impeller is provided with 6 convex nodes, the sizes of the concave-convex nodes are related to the blade width of the impeller at the position of the concave-convex nodes, the concave-convex nodes are distributed as shown in figure 1, the convex nodes in the middle of the guide edge are largest, the convex nodes are gradually reduced towards two edges, and the convex nodes are smoothly transited to blade tips and blades of the turbine section; 9 convex nodes are arranged on the turbine-section turbine-shaped vertical blade leading edge, the width of the vertical blade is basically unchanged, and the size of the concave-convex node is the same as that of the hub and is in smooth transition with the hub. Compared with the common impeller, the impeller of the propeller section has larger area and better hydrodynamic performance and can generate larger additional thrust; the turbine section impeller absorbs and converts wake energy to a greater extent than conventional impellers.
In the profile line chart of the boosting impeller shown in the attached figure 1, the shape of a convex node is a sine curve shape, and the expression is as follows:
or
Wherein B is the blade width of the propeller section impeller at the node, B is the blade width of the vertical blade of the turbine section impeller, and x is in the value range of (0, pi).
In the cross section of the boosting impeller shown in the attached figure 2, the cross sections of adjacent 'bulges' and 'depressions' are both wing-shaped, and the length of a bulge node is increased at the bulges than at the depressions.
In the top view of the boosting impeller shown in the attached figure 3, the inclination angle between each blade of the boosting impeller and the surface of the propeller plate is 4 degrees, and the connecting end part of each blade and the hub shaft is in smooth transition in torsion.
In conclusion, the invention aims to provide a bionic boosting impeller device of a ship simulating a pectoral fin concave-convex knot of a whale with a sitting head. The impeller is coaxial with the propeller and can rotate freely, and each blade of the boosting impeller and the surface of the propeller disc form an inclination angle of 4 degrees; impeller leading edge portion is unsmooth leading edge structure, unsmooth leading edge structure is promptly for setting up unsmooth knot, and the protruding node projection curve of impeller propeller section and turbine section blade leading edge is sinusoidal, and its expression formula is respectively:
or
The maximum height of the convex node is B/10 or B/10, wherein B is the blade width of the propeller section impeller at the node, B is the blade width of the turbine section impeller vertical blades, and x has the value range of (0, pi). The invention can absorb and convert the wake flow energy of the propeller to a greater extent, delay boundary separation, have larger blade area and generate larger additional thrust; meanwhile, the installation is convenient, the installation of a new ship and the transformation of an old ship are convenient, the energy-saving effect is obvious, and the cost is reduced.
Claims (9)
1. The utility model provides a bionical boosting device of boats and ships, includes boosting impeller, its characterized in that: the boosting impeller is coaxial with the propeller and can rotate freely, and each blade of the boosting impeller and the surface of the propeller disc form an inclination angle of 4 degrees; the guide edge part of the boosting impeller is of a concave-convex front edge structure, and the guide edge of the boosting impeller comprises a guide edge of a turbine-shaped blade of a turbine section of the boosting impeller, namely a guide edge of one side of the turbine-shaped blade, which is firstly contacted with the water surface during forward rotation, and a guide edge of a blade of a propeller section of the boosting impeller; the boost blade tangent plane is the airfoil tangent plane shape, and unsmooth leading edge structure includes unsmooth node, and adjacent protruding node junction forms sunken node, and boost impeller propeller section protruding node projection line is the sinusoidal, and the expression is
B is the screw at the nodeThe impeller of the propeller section has wide blade, and the value range of x is (0, pi); the turbo-impeller turbine section turbine-shaped blade is a vertical blade, the blade has 9 convex nodes, the projection line of each convex node is a sine curve, and the expression of the projection line of each convex node is
b is the width of the vertical blade of the turbine section, and x is in the value range of (0, pi).
2. The bionic boosting device for the ship of claim 1, wherein: the propeller-shaped blade guide edge of the boosting impeller propeller section has the same protruding degree with the concave-convex nodules, the size of the propeller-shaped blade guide edge is related to the blade width of the impeller at the position of the propeller-shaped blade guide edge, the protruding node at the middle of the guide edge is largest, the protruding node is gradually reduced towards two sides, and the blade guide edge is smoothly transited to the blade tip and the blades of the turbine section.
3. A bionic propulsion device for a ship according to claim 1 or 2, characterized in that: the other end of the convex node of the turbine section is smoothly transited to the hub shaft part.
4. A bionic propulsion device for a ship according to claim 1 or 2, characterized in that: the shape of the turbine of the boosting impeller turbine section is vertical to the blade width and is basically unchanged, the sizes of the guide edge concave-convex nodules are the same, and the guide edge concave-convex nodules are in torsional smooth transition with the connecting end part of the hub shaft.
5. The bionic boosting device for the ship of claim 3, wherein: the shape of the turbine of the boosting impeller turbine section is vertical to the blade width and is basically unchanged, the sizes of the guide edge concave-convex nodules are the same, and the guide edge concave-convex nodules are in torsional smooth transition with the connecting end part of the hub shaft.
6. A bionic propulsion device for a ship according to claim 1 or 2, characterized in that: the number of the convex nodes is 15, the whole arrangement is divided into a propeller section and a turbine section, and 6 convex nodes are arranged on the propeller-shaped blade guide edge of the impeller propeller section, and the shapes and the convex degrees of the convex nodes are the same and the sizes of the convex nodes are different; the turbine section turbine shape is vertical to the guide edge of the blade and is provided with 9 convex nodes which are same in shape and size.
7. The bionic boosting device for the ship of claim 3, wherein: the number of the convex nodes is 15, the whole arrangement is divided into a propeller section and a turbine section, and 6 convex nodes are arranged on the propeller-shaped blade guide edge of the impeller propeller section, and the shapes and the convex degrees of the convex nodes are the same and the sizes of the convex nodes are different; the turbine section turbine shape is vertical to the guide edge of the blade and is provided with 9 convex nodes which are same in shape and size.
8. The bionic boosting device for the ship of claim 4, wherein: the number of the convex nodes is 15, the whole arrangement is divided into a propeller section and a turbine section, and 6 convex nodes are arranged on the propeller-shaped blade guide edge of the impeller propeller section, and the shapes and the convex degrees of the convex nodes are the same and the sizes of the convex nodes are different; the turbine section turbine shape is vertical to the guide edge of the blade and is provided with 9 convex nodes which are same in shape and size.
9. The bionic boosting device for the ship of claim 5, wherein: the number of the convex nodes is 15, the whole arrangement is divided into a propeller section and a turbine section, and 6 convex nodes are arranged on the propeller-shaped blade guide edge of the impeller propeller section, and the shapes and the convex degrees of the convex nodes are the same and the sizes of the convex nodes are different; the turbine section turbine shape is vertical to the guide edge of the blade and is provided with 9 convex nodes which are same in shape and size.
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| CN201911257214.6A CN110937091B (en) | 2019-12-10 | 2019-12-10 | Bionic boosting device for ship |
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| CN201911257214.6A CN110937091B (en) | 2019-12-10 | 2019-12-10 | Bionic boosting device for ship |
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| CN110937091B true CN110937091B (en) | 2021-07-06 |
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| RU2317225C2 (en) * | 2006-02-10 | 2008-02-20 | Владимир Николаевич Думнов | Marine propeller |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| KR20140004402A (en) * | 2012-07-02 | 2014-01-13 | 현대중공업 주식회사 | Propeller wings with wavy leading edge |
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| CN106882352A (en) * | 2017-04-01 | 2017-06-23 | 大连海事大学 | A kind of bionic propeller with zigzag lagging edge |
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2019
- 2019-12-10 CN CN201911257214.6A patent/CN110937091B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2067062C1 (en) * | 1991-04-01 | 1996-09-27 | Петр Алексеевич Макаров | Propeller |
| RU2317225C2 (en) * | 2006-02-10 | 2008-02-20 | Владимир Николаевич Думнов | Marine propeller |
| KR20140004402A (en) * | 2012-07-02 | 2014-01-13 | 현대중공업 주식회사 | Propeller wings with wavy leading edge |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| CN204548457U (en) * | 2015-01-30 | 2015-08-12 | 哈尔滨工程大学 | A kind of bionic propeller |
| CN105129061A (en) * | 2015-08-10 | 2015-12-09 | 上海斯玛德大推船用螺旋桨设计有限公司 | Propeller |
| CN106882352A (en) * | 2017-04-01 | 2017-06-23 | 大连海事大学 | A kind of bionic propeller with zigzag lagging edge |
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| Title |
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