CN104986313A

CN104986313A - Multi-concave-plane propeller

Info

Publication number: CN104986313A
Application number: CN201510472052.3A
Authority: CN
Inventors: 李清林
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-05
Filing date: 2015-08-05
Publication date: 2015-10-21

Abstract

Disclosed in the invention is a multi-concave-plane propeller comprising a propeller hub and a blade. A thrust surface of the propeller blade is formed by a plurality of concave planes at the radial direction. Compared with the prior art, the multi-concave-plane propeller has the following beneficial effects: the thrust surface of the propeller blade is formed by a plurality of concave planes at the radial direction and the large thrust force can be provided with the same protection area; and the radial streaming can be reduced and thus the propeller with the high thrust efficiency can be provided.

Description

Many matrixs surface helix oar

Technical field

The present invention relates to technical field of ships, especially a kind of many matrixs surface helix oar.

Background technology

Screw propeller, as propelling or energy conversion device, has a wide range of applications in reality.Following a few class can be divided into by mode of operation: the reaction propulsion one, utilizing convection cell, as boats and ships, aircraft etc. use screw propeller to advance, be called screw propeller traditionally; Two, convection cell applies the conveying that energy completes air and water or other fluid, is called fan or pump leaf etc. traditionally; Three, the kinetic energy absorbing fluid is translated into mechanical energy, is called wind-force, hydroelectric blade or turbine etc. traditionally.

Screw propeller is the most widely used a kind of propulsion mode in existing ship Push Technology, and screw propeller is generally made up of propeller hub and blade, and relatively large propeller blade is generally aerofoil profile or arcuate, and the blade of small propeller or fan etc. also has sheet type.

The principle of work of screw propeller is when screw propeller rotates, and blade is to pusher water fluids such as (or) air, and water fluids such as (or) air produces thrust to the antagonistic force of blade.Formation higher-pressure region, propeller thrust face, suction surface forms meiobar.

In order to improve the propulsion coefficient of screw propeller, there has been proposed various method, comprising the blade design of various shape, as Deng Zhen root ZL95101084.0 " ship equal lift angle propeller " 1995.01.18; Tian Runjun ZL200410022947.9 " concavo-convex blade and concavo-convex blade propeller " 2004.03.03; Mitsubishi Electric Corporation ZL200980157715.5 " propeller type fan " 2009.04.28; Li Shiqing ZL201110125013.8 " a kind of high-performance airscrew " 2011.05.06; Harbin Engineering University ZL201210149467.3 " guide edge concave-convex screw propeller " 2012.05.15; Samsung Electronics Co., Ltd ZL201310437318.1 " screw ventilation " 2013.09.24; Comprise the blade (controllable pitch propeller) of changeable angle, blade installs additional and prevents streaming the kinds of schemes such as bar, as BJ University of Aeronautics & Astronautics ZL92102778.8 " screw propeller " 1992.04.23; Daikin Ind Ltd ZL200980101462.X " propeller type fan " 2009.01.05; Jiangsu University of Science and Technology ZL201310626569.4 " anti-radial flow-disturbing propeller for vessels " 2013.12.02; And various external device, disappear as installed additional after propeller hub whirlpool fin, installs spoiler additional, outside screw propeller, install the multiple external device schemes such as mozzle additional before screw propeller.

The technical scheme Problems existing of existing raising propeller propulsive efficiency, the propulsion coefficient of screw propeller improves the problems such as limited, so do not promoted widely in practice, what in practice, most merchant ship was installed is common fixed pitch propeller, prior art screw propeller mainly contains MAU type and Type B oar, blade is aerofoil profile or arcuate, and thrust face is a small curve curved surface diametrically.

According to fluid mechanics ^[1]principle, [1] Jia Baoxian, Zhou Junwei. " fluid mechanics ". Beijing, Chemical Industry Press .2014.1, the drag coefficient of difform object is different, the drag coefficient in the matrix face of same area of conter is greater than plane, plane drag coefficient as same projection area is 1.1, the drag coefficient of the half round concave of same projection area is 1.4, that is under same projection area, pressure ratio plane in face of matrix is larger, so plane is compared in many matrixs face of same projection area can obtain larger thrust.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of many matrixs surface helix oar, having and provide larger thrust under identical area of conter, and radial direction can be reduced stream, so the screw propeller of higher propulsion coefficient can be provided.

The technical solution adopted in the present invention is: propeller blade thrust face is made up of multiple matrix face diametrically, and propeller blade section shape is undaform or sawtooth pattern.Could do work because screw propeller needs to rotate, for making resistance on the direction of rotation little as much as possible, each matrix face from guide margin to being fluted body with edge direction.

Propeller blade thrust face of the present invention is made up of multiple matrix face diametrically, and many matrixs face of same projection area is compared plane and can be obtained larger thrust, has higher propulsion coefficient.

Compared with prior art, the invention has the beneficial effects as follows: under identical area of conter, provide larger thrust, and radial direction can be reduced stream, so the screw propeller of higher propulsion coefficient can be provided.The screw propeller of same diameter, many matrixs surface helix oar of the present invention can provide larger thrust; Need to provide identical thrust, many matrixs surface helix oar of the present invention can use less diameter.For being subject to dimensional restriction, this especially maybe will ensure that the super large marine of screw propeller permeability factor is significant.

The present invention also can be applicable to the properller as propeller system, as fan blade and the blade-type pump of fluid delivery system, as the wind-force of energy conversion device, the blade of hydroelectric generator and turbine etc.

Accompanying drawing explanation

Fig. 1 is; Propeller blade is aerofoil profile or arcuate, has the screw propeller of casterangle, and thrust face is many matrixs face, is applicable to large ship screw propeller;

Fig. 2 is; Propeller blade is aerofoil profile or arcuate, has the screw propeller of casterangle, and thrust face and suction surface are many matrixs face, is applicable to large ship screw propeller;

Fig. 3 is; Aclinic sheet type screw propeller, blade section body is many matrixs face; Be applicable to spitkit screw propeller, or fan blade, pump blade, turbine etc.;

Fig. 4 is; Propeller blade is aerofoil profile or arcuate, and have casterangle, blade face streamline improved type screw propeller, thrust face is many matrixs face; Be applicable to large ship screw propeller.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is further described.

Detailed description of the invention 1, as shown in Figure 1, propeller blade is aerofoil profile or arcuate, and blade thrust face is made up of multiple matrix face diametrically, and the section in each matrix face is circular arc, deep equality, and width is equal, each matrix face composition concentric circles.

Detailed description of the invention 2, as shown in Figure 2, propeller blade is aerofoil profile or arcuate, and blade thrust face is made up of multiple matrix face diametrically, and the section in each matrix face is circular arc, deep equality, and width is equal, each matrix face composition concentric circles; Blade suction surface is corresponding with the concavo-convex position of thrust face, and the corresponding concave groove of suction surface also forms concentric circles.

Detailed description of the invention 3, as shown in Figure 3, propeller blade is sheet type, and blade body is made up of multiple matrix face diametrically, and the section in each matrix face is circular arc, deep equality, and width is equal, each matrix face composition concentric circles.

Detailed description of the invention 4, as shown in Figure 4, propeller blade is aerofoil profile or arcuate, blade thrust face is made up of multiple matrix face diametrically, the section in each matrix face is circular arc, the recessed degree of depth reduces to blade tip gradually from blade root, and matrix face width degree increases to lagging edge gradually from guide margin, and each matrix face rearranges helix shape.

The above is only embodiments of the present invention, the shapes such as the section shape of concave profile of the present invention also can be ellipse arc, parabola shaped, hyperbola, stretched wire are linear, spinning roller is linear, involute shape, upside-down trapezoid; The white blade root of the recessed degree of depth in matrix face also can increase gradually to blade tip, first can also increase and then reduce again; Concave arc width also can reduce to lagging edge gradually from guide margin; Matrix face also can be arranged as the shapes such as involute shape, Archimedes spiral; The shape in many matrixs face, the degree of depth, width, the permutation and combination method in many matrixs face can also make rational change further.

Experimental verification is as follows: carved ten concave grooves at capable 3684 type electric fan thrust faces, the section of each concave groove is circular arc, deep equality, and width is equal, each concave groove composition concentric circles (hand engraving has certain error).In all non-change situations of other condition such as drive motor, fan card size, fan pitch.Wind speed before and after contrast engraving concave groove, according to calculation of mean value in 30 cm distance, maxim average increase is 4.37%, and aviation value average increase is 4.60%; Consider that wind speed increases with distance and decays, if get data in 10 centimetres, maxim average increase is 4.39%, aviation value average increase is 5.16%, if only get 5 centimetres of data, maxim average increase is 5.16%, and aviation value average increase is 6.24%.

Experiment material: capable 3684 type 6 cun of electric fans, rated voltage 5V rating horsepower 3W

Electric power system: exchange---utility grid, direct current---association THINKPAD X230i

Tools for measurement: the uncommon split type digital anemometer of agate AS836 hand-held---measuring wind, wind-warm syndrome

Excellent sharp moral UT39C digital multimeter---measure interchange, vdc

Casio PRG-130---measures air pressure

Experiment place: before the wind speed transformation of 2 grades, Room, the German-Chinese heart of No. 128, West South Fourth Ring Road, Fengtai District, Beijing City institute's promise No. 3 building 802 (measuring distance: centimetre, wind speed unit: meter per second)

Experimental period	2015/6/17	15∶12	2015/6/18	11∶10	2015/6/18	12∶46
									AC and DC voltage	V＝228	v＝5.14	V＝223	v＝5.14	V＝228	v＝5.14
Air pressure, wind-warm syndrome	992hpa	26.0`C	997hpa	26.2`C	996hpa	26.1`C
									Measuring distance cm	Maxim m/s	Aviation value m/s	Maxim m/s	Aviation value m/s	Maxim m/s	Aviation value m/s	3 times average	3 times average
5	4.655	4.503	4.566	4.524	4.607	4.533	4.609	4.520
									10	4.147	4.04	4.198	4.126	4.139	4.045	4.161	4.070
15	3.98	3.873	4.013	3.915	3.987	3.932	3.993	3.907
									20	3.645	3.584	3.634	3.522	3.628	3.576	3.636	3.561
25	3.331	3.285	3.341	3.246	3.212	3.19	3.295	3.240
									30	3.066	2.935	2.971	2.879	2.986	2.879	3.008	2.898

After 2 grades of wind speed transformations (measuring distance: centimetre, wind speed unit: meter per second)

Experimental period	2015/6/25	13∶10	2015/6/25	15∶23	2015/6/26	11∶11
									AC and DC voltage	V＝226	v＝5.14	V＝226	v＝5.14	V＝224	v＝5.14
Air pressure, wind-warm syndrome	991hpa	25.5`C	990hpa	25.5`C	991hpa	25.7`C
									Measuring distance cm	Maxim m/s	Aviation value m/s	Maxim m/s	Aviation value m/s	Maxim m/s	Aviation value m/s	3 times average	3 times average
5	4.828	4.778	4.877	4.803	4.837	4.825	4.847	4.802
									10	4.277	4.184	4.308	4.248	4.35	4.278	4.312	4.237
15	4.098	3.988	4.144	4.064	4.147	4.08	4.130	4.044
									20	3.773	3.722	3.911	3.783	3.786	3.735	3.823	3.747
25	3.421	3.333	3.484	3.408	3.444	3.36	3.450	3.367
									30	3.113	3.013	3.156	3.057	3.131	3.026	3.133	3.032

After transformation, wind speed increases percentum

Measuring distance

Maxim increases

Aviation value increases

5

3.72％

6.11％

6.81％

6.17％

4.99％

6.44％

5.16％

6.24％

10

3.13％

3.56％

2.62％

2.96％

5.10％

5.76％

3.61％

4.09％

15

2.96％

2.97％

3.26％

3.81％

4.01％

3.76％

3.41％

3.52％

20

3.51％

3.85％

7.62％

7.41％

4.36％

4.45％

5.16％

5.22％

25

2.70％

1.46％

4.28％

4.99％

7.22％

5.33％

4.70％

3.91％

30

1.53％

2.66％

6.23％

6.18％

4.86％

5.11％

4.18％

4.64％

On average

2.93％

3.43％

5.14％

5.25％

5.09％

5.14％

4.37％

4.60％

Claims

1. the oar of matrix surface helix more than a kind, be made up of propeller hub and blade, propeller blade is aerofoil profile, arcuate or sheet type, it is characterized in that: propeller blade thrust face is made up of multiple matrix face diametrically, the section shape in this matrix face is circular arc, each matrix face is from guide margin to being fluted body with edge direction, and each concave groove is around axle center group concentrically round shape.

2. one many matrixs surface helix oar according to claim 1, is characterized in that: suction surface also has the concavo-convex position of concave groove and thrust face corresponding.

3. one many matrixs surface helix oar according to claim 1, it is characterized in that: propeller blade is sheet type, blade body is made up of multiple matrix face diametrically.

4. one many matrixs surface helix oar according to claim 1, is characterized in that: the recessed degree of depth in each matrix face reduces to blade tip gradually from blade root, and concave arc width increases to lagging edge gradually from guide margin, and each matrix face rearranges helix shape around axle center.

5. one many matrixs surface helix oar according to claim 1, is characterized in that: the section shape in matrix face is circular arc, ellipse arc, parabola shaped, hyperbola, stretched wire are linear, spinning roller is linear, involute shape, fold-line-shaped or upside-down trapezoid; The recessed degree of depth in matrix face reduces to blade tip gradually from blade root, or increase gradually, or first increases and then reduce again; Matrix face width degree increases to lagging edge gradually from guide margin, or reduce gradually; Matrix face is arranged in concentric circles, or is arranged as the shapes such as involute shape, Archimedes spiral; The shape in many matrixs face, the degree of depth, width, the permutation and combination method in many matrixs face can make rational change further.