JP2014173552A - High efficiency propeller/screw/blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propeller/screw/blade for improving propulsion efficiency in the screw used in a marine and a turbine blade of a propeller used in an airplane and a wind power generation.SOLUTION: Eddy current generated from a blade tip of a turbine blade of a screw used in a marine and a propeller used in an airplane and wind power generation is shut off by arranging a screen vane 11. With this arrangement, surplus eddy current energy generated from the propeller is eliminated, resistance is decreased, an air enclosing state is increased, a propulsion of propeller/screw/blade is increased and a propulsion efficiency is improved by leaps and bounds.

Description

  The present invention is a technique for improving the efficiency of turbine blades of propellers for screws, airplanes and wind power generators used in ships.

Airplanes and ships rely on propellers or screws for propulsion. Wind power is generated by a propeller. FIG. 1 is a view showing a known screw. In the conventional example shown in the figure, four wide blades 1 are attached to a rotating shaft 2.
The number of blades 1 is not limited to four, and may be any number, but there is nothing on the edge of the known blade 1.

  FIG. 2 is a view showing a known example of a propeller for wind power generation. As in the case of FIG. 1, a plurality of long blades 3 are attached to the rotating shaft 4, and there is nothing at the blade tip. Many patent applications have been filed for propellers or screws (see, for example, Patent Documents 1 to 3).

JP 2009-29268 A JP2012-21485A JP 2012-71823 A

  Conventional propeller and screw technologies, as shown in Patent Literature 1 to Patent Literature 3, increase the strength of the base of the wing and provide a convenient mechanism for attaching and detaching the wing. It is a technique for strengthening using a reinforced plastic composite material, and the technique of the present invention for improving the efficiency of the propeller is not considered.

By the way, it is known that a wing tip vortex is generated at the tip of the wing of a normal airplane wing, and the efficiency is lowered. Hereinafter, the principle of generation of the blade tip vortex will be described. FIG. 3 is an explanatory diagram of the generation of blade tip vortex flow. When the propeller 1 attached to the rotating shaft 2 rotates, a vortex 6 as shown in FIG. 3 is generated at the tip of the propeller. 5 is a centrifugal force flow. This vortex 6 reduces the efficiency of the propeller.

FIG. 4 is a view showing a cross section taken along the line AA of FIG. A hatched portion in the figure shows a cross section 1 a of the wing 1. An example is “Clark Y”. The air striking the wing 1 diverts in the upward direction 8 and the downward direction 9 at the leading edge 7. The air flows divided in the upward direction and the downward direction are merged at the trailing edge 10 of the blade 1, but since the length on the branch 8 side is longer than the length on the branch 9 side, the speed to the trailing edge merge point is different.

  Since the time required to reach the trailing edge joining point is the same, the speed on the 8 side is faster than that on the 9 side. Therefore, the pressure on the 8 side becomes lower than that on the 9 side, and air pushes up the wing in the upward direction in the figure. This is the wing lift 16. Since there is no wing 1 at the wing tip of this lift 16, the downstream 9 and the upstream 8 of the wing 1 merge, and at the same time, they are blown to the wing tip by the centrifugal force flow 5, and the flow 9 pushes the upper flow 8 from below. A vortex 6 (FIG. 3) is generated.

  FIG. 5 shows an embodiment of the present invention, in which a cylindrical partition vane 11 is provided at the tip of the wind turbine generator propeller or aircraft propeller 1 along the rotary orbit 15 at the tip of the propeller 1. If the generated vortex 6 is partitioned by the partition vanes 11, the fluid force 5 to the tip of the propeller due to the centrifugal force 5 and the pushing-up force due to the difference between the flow 8 on the blade upper surface and the flow 9 on the lower surface are mixed at the blade tip. Since this is interrupted and separated, the vortex 6 is not generated. This eliminates excess vortex energy generated by the propeller, reduces resistance, increases air enclosure, increases thrust, and dramatically improves the propeller effectiveness.

  The present invention that solves the above-described problems is provided with vanes that prevent the generation of eddy currents and surround the fluid at the tip of an aircraft, propeller, marine screw, or turbine blade.

  The efficiency of wind turbines, aircraft propellers and ship screw turbine blades can be improved with a very simple, lightweight and compact structure. It is also cheaper and less bulky than any other method. In addition, no vortex at the tip of the wing is generated, so no noise is generated, and there are no complaints in the vicinity due to wind power generation. In addition, when the propeller end or screw end hits a foreign object, the 7 propeller or screw turbine blade is protected.

Also, it is cheaper than any other method, it is not bulky, air is enclosed and 16 ducts are not required, it is compact, it can be used outdoors and indoors, and wind input efficiency is dramatically improved, so the wind is weak Even power can be generated. Normally, wind of 15 m / s is required, but when the present inventors experimented the present invention, rotational power was generated even with wind of 1.4 m / s. In the case of a screw, even if the screw contacts the seabed, the screw is protected from destruction.
In the text, the term “propeller” includes a vertical wind-type wind power generator 12 as shown in FIG. In addition, various modifications can be considered, and these are all included in the scope of the present invention.

Diagram showing a known propeller Diagram showing a known screw Illustration of eddy current generation Diagram showing the principle of eddy current generation Explanatory drawing of Example 1 of this invention Explanatory drawing of Example 2 of this invention Explanatory drawing of Example 4 of this invention

FIG. 5 shows the wind power generation or aircraft propeller according to the first embodiment of the present invention, which is enclosed and improves the efficiency.
FIG. 6 shows a second embodiment in which the present invention is applied to a screw for ships, etc. The principle effect is the same as that of the propeller of FIG.
It is. FIG. 7 shows a fourth embodiment of the present invention, which is a wind power generator in which a vertical fin 12 is rotated about a vertical axis 13, and fin end plates 14 are arranged on the vertical fin 12.

  Wind power can be generated even when the wind is weak, and the power generation capacity can be further increased with normal wind power. In addition, the propeller body can be reduced in size. The propulsive force can be increased as an aircraft propeller or marine screw, and a small propeller or screw can be used with the same propulsive force. Turbine efficiency can be increased as a turbine blade.

DESCRIPTION OF SYMBOLS 1 Propeller 2 Rotating shaft 3 Propeller 4 Propeller rotating shaft 5 Centrifugal flow 6 Centrifugal flow 7 Leading edge 8 Blade upstream 9 Blade downstream 10 Blade trailing edge 11 Blade tip vane 12 Vertical wind tunnel of vertical wind-tunnel wind power generation 13 14 Fluid blocking plate 15 provided perpendicular to the vertical wind end 15 Rotating tip locus 16 Enclosed fluid 17 Wind

Claims (1)

Propeller / Screw / Blade A high-efficiency propeller / screw / blade characterized by a centrifugal flow stop blade tip vortex generation prevention and fluid enclosure screen vane at the tip of the propeller / screw / blade.

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