CN2095830U - Air propeller - Google Patents

Abstract

The utility model relates to an air power device, in particular to a high-efficiency widely applicable air propeller, which is composed of a driving shaft and propeller blades which are installed on the driving shaft. The air propeller is characterized in that one same flat surface is provided with at least two blades, which form a blade group; the driving shaft is provided with at least two blade groups, and a distance exists between the two groups; the horizon elevation angle of the upper blade is 0-16 DEG, and the horizon elevation angle of the lower blade is 5-20 DEG; the cross-section of each of the blades is a shape whose front is thick and back is sharp, which appears streamlined and similar to an aircraft wing. The utility model has the advantages of high efficiency, high stability and large lifting force. The air propeller is not only applicable to an air flying vehicle, but also widely applied to marine vessels; with small resistance force, the air propeller is not hindered by floaters in the navigation channel.

Description

Air propeller

The utility model relates to air generation plants, the high air screw applied widely of particularly a kind of efficient.

Chang Yong screw propeller generally was by one group of screw blade of fixed installation on the imput shaft in the past, no matter with aboard, still be used in the boats and ships, had inefficient shortcoming.Especially screw propeller exists resistance big on the boats and ships, as improving the speed of a ship or plane and load carried, then will strengthen power, and generally screw propeller is to adopt the cast iron manufacturing, and weight is big, in river, especially is easy to corrosion in seawater.

The purpose of this utility model provides the high air screw applied widely of a kind of efficient.

The utility model is finished as follows: hard-wired screw blade is at least 2 on the imput shaft, and same Plane Installation is formed the blade group, also has two groups at least, between two groups spacing is arranged, also at least 2 of second group of blades, also same Plane Installation is formed the blade group.In order to improve lift and efficient, blade has been made horizon elevation angle, and the horizon elevation angle of second group of blade is slightly larger, and the cross-sectional plane of blade is preceding thick metacone, and is similar to aircraft wing, is stream line pattern, and two groups of blade hand of rotation are all the same with speed.

Owing between two groups of blades spacing is arranged up and down, and this spacing varies the wind ravine that the contraction back is expanded before the formation downwards.A part of air passes through from wind-tunnel when screw propeller is worked, according to aerodynamics, know from glass one horse law, gas volume reduces density to be increased, pressure increases, air becomes big to the pressure of last blade front lower surface, promptly goes up blade generation lift and also increases, and simultaneously following blade posterior face is produced suction.According to gas property, air speeds up backward during the wind-tunnel volume-diminished, and kinetic energy increases, and determines from the wind-tunnel rear shape, air is all pressed to blade rear portion lower surface, with the lower surface back change of direction that bumps, in the back expansion part of whole wind-tunnel, air is very high in last blade lower surface place density, very big to last blade pressure, it is also very big promptly to produce lift, and very thin during the upper surface place behind following blade, pressure is very low.This air pressure difference speeds with the rotating speed of screw propeller and increases, otherwise then reduces.Produce very big lift to last blade when therefore air is by wind-tunnel, also give blade back generation down very big upwards suction simultaneously, also promptly improved lift.

Therefore, the utility model is bigger than the lift of screw propeller commonly used, the efficient height, and stability is good, and applied widely, not only can be applicable to also can extensively be used on the boats and ships on the air aircraft.On two all identical ships of other conditions; the speed that screw propeller of the present utility model is installed is faster than the ship of general screw propeller (under water); more can embody its preceence when especially in shallow place of navigation channel water and navigation channel water, foreign material being arranged, when using certainly protective case will be installed aboard ship.

Further specify below in conjunction with accompanying drawing.

Fig. 1 is the air screw constructional drawing.

Fig. 2 is the left view of looking from the blade cross section among Fig. 1.

Fig. 3 is the birds-eye view among Fig. 1.

Fig. 4 is the front elevation among Fig. 1.

Fig. 5 is a blade cross sectional drawing up and down.

Fig. 6 is a wind-tunnel diagram of curves between blade up and down.

With reference to Fig. 1, (1) two of blade is captiveed joint with the same plane of imput shaft (11), blade group on the composition, and in like manner blade (2) also is two, also with the same plane of imput shaft (11) the blade group that is composed of a fixed connection down.Between these two groups of blades spacing is arranged, be generally about 1/2nd of blade width.As can be seen from the figure on the cross-sectional plane of blade (1) (2), wedge angle (3) and wedge angle (4) are arranged, blade (1) (2) upper surface is a stream line pattern, and lower surface is milder, and preceding thick metacone, and is similar to aircraft wing.

With reference to Fig. 2, be blade from Fig. 1 (1) (2) section view to the left.The same 0-16 ° of its horizon elevation angle of two blades (1) on the same plane, in like manner the horizon elevation angle of (2) two of blades too, 5-20 °.

With reference to Fig. 3, be the birds-eye view of Fig. 1, the sheet number of blade (1) (2) respectively is 2, but also can be 3 or 4 or multi-disc more, and all installs in same plane symmetry and constitute screw propeller.

With reference to Fig. 4, be the front elevation of Fig. 1, two of blades must be symmetrical, and not only the both sides blade all will be equal in weight, and length is the same, and shape is also just the same.Blade (1) (2) is generally made with aluminum alloy or plastics or timber.

With reference to Fig. 5, be the cross sectional drawing of blade (1) (2) up and down, find out wedge angle 3 and wedge angle 4, neighbouring thicker, attenuation downwards then, each curved above the blade, following gently.

With reference to Fig. 6, be after upward blade (1) installs with following blade (2), pitch space situation between the two.Get a part, find out that the lower surface (5) and the space (9) between following blade (2) upper surface (7) of going up blade (1) are less, become big to space (10) gradually, promptly go up that blade (1) lower surface (6) is located and the space (10) of following blade (2) upper surface (8) between locating becomes big, form wind-tunnel.When blade rotates, according to aerodynamic property, know that from glass one horse law gas volume dwindles, density increases, and pressure increases.The pressure that air is located last blade (1) front lower surface (5) becomes big, makes blade (1) produce lift and also increases.According to gas property, air flowing velocity quickening backward during the wind-tunnel volume-diminished, kinetic energy increases.(9) (10) shape is found out from the space, and air is pressed to blade (1) rear portion lower surface (6) and located, with its back change of direction that bumps.In the back expansion part of whole wind-tunnel, it is very high that air is located density at last blade (1) lower surface (6), and it is also very big to produce lift, and it is very thin to locate air to following blade (2) back upper surface (8), and pressure is very low.This air pressure difference speeds with the rotating speed of screw propeller and increases, otherwise then reduces.Therefore, produce very big lift for when air passes through wind-tunnel last blade (1), blade (2) upper surface produces very big upwards suction under also giving simultaneously, also is lift.So, the utility model has the incomparable advantage of screw propeller commonly used, the efficient height, stability is good, lift is big, Applicable scope is extensive, not only be used for the air aircraft, can also be widely used on the boats and ships, replace underwater propeller, therefore blade is difficult for by marine corrosion, not hindered by the winding of floating debris in river course and the ocean current, simultaneously not can make by resistance, the blade of river and ocean current very light for blade, so can be with under the constant velocity, power power also just can be smaller, reaches the effect of energy savings.

Claims (4)

1, air screw, going up fixed installation screw blade (1) (2) by imput shaft (1) forms, it is characterized in that blade (1) forms the blade group by at least 2 same Plane Installation, blade (2) also at least 2 same Plane Installation is formed the blade group, have two groups at least, between two groups spacing is arranged, it is 0-16 ° that blade (1) (2) has the horizon elevation angle of last blade (1) when installing with imput shaft (11), the horizon elevation angle of following blade (2) is 5-20 °, blade (1) (2) cross-sectional plane is preceding thick metacone shape, and it is similar to aircraft wing to be stream line pattern.

2, according to the said air screw of claim 1, the sheet number that it is characterized in that blade (1) is 2 or 3 or 4.

3, according to claim 1 or 2 said air screws, the spacing that it is characterized in that two blade groups is about 1/2nd of a blade width.

4,, it is characterized in that blade (1) (2) makes with aluminum alloy or plastics or timber according to the said air screw of claim 2.

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