CN201771874U

CN201771874U - Air jetting amplifier

Info

Publication number: CN201771874U
Application number: CN2010202823388U
Authority: CN
Inventors: 余学颖; 欧阳宁; 李勇敏
Original assignee: WUXI YINGWEI HUAYAO TECHNOLOGY Co Ltd
Current assignee: WUXI YINGWEI HUAYAO TECHNOLOGY Co Ltd
Priority date: 2010-08-05
Filing date: 2010-08-05
Publication date: 2011-03-23
Anticipated expiration: 2020-08-05

Abstract

The utility model discloses an air jetting amplifier which is characterized by comprising an inner ring and an outer ring, wherein the inner ring forms an jetted air passage; a jetted air inlet is arranged at one end of the jetted air passage, and an air outlet is arranged at the other end; the inner ring and the outer ring are connected into an annular cavity in an embedding way; the inner ring and the outer ring are not closed at the jetted air inlet, thus forming an annular gap; the width of the annular gap is uniform, the range of width is from 0.5 to 5.0 millimeters, the width is determined by the diameter of the air jetting amplifier, and the range of diameter is from 100 to 2200 millimeters; the opening of the gap faces towards the jetted air passage; the inner surface of the inner ring, extending from the annular gap to the interior of the ring, is the Coanda surface; and the outer ring is provided with a compressed air inlet communicated with the annular cavity. The air jetting amplifier has simple structure; the main parts are only the inner ring and the outer ring; the final outlet air quantity is the sum of sucked air, supplied compressed air and entrained air; and in the normal state, the ratio of the final outlet air quantity to the inlet air supply quantity is (30 to120) to 1.

Description

The air ejection amplifier

Technical field

The utility model belongs to the aeromechanics technology field, uses boundary layer principle and wall attachment effect, as power source, drives mobile high pressure, the high velocity air of forming of surrounding atmosphere with the small amount of compression air, is a kind of air ejection amplifier.

Background technique

The air ejection amplifier is the kinetic energy injection ambient air that utilizes the main jet pipe jet, and mixes with it, thereby realizes purposes such as injection dust suction, cooling, reduction of speed, noise reduction.

According to hydromechanical basic principle---boundary layer principle and wall attachment effect (Coanda Effects), with the small amount of compression air as power source, drive mobile high pressure, the high velocity air of forming of surrounding atmosphere, flow is the 30-120 doubly above (under the standard state) of air consumption.Can be used for transmitting air scavenges, discharges fume and carry light material etc.Pressurized air is after suction port flows into annular chamber, high speed flow is crossed ring nozzle, this strand primary airstream is adsorbed on the surface of profile, so produce a low pressure area in cavity center, thereby a large amount of on every side air is inhaled into, primary airstream and on every side air-flow converge that the back just forms at a high speed, the air-flow of high power capacity flows out from the air amplifier.When fluid high-speed flows, owing to the fluid of the fluid of speed around around driving soon flows together, the variation of high-velocity fluid circumferential pressure to around the effect of fluid generation drainage.

Because it is non-maintaining that the air ejection amplifier has, movement-less part does not have electricity thereby does not have advantage such as explosion risk, and application prospect is very good, and at present, existing air ejection amplifier mainly contains the application of the following aspects:

1, oven dry moist surface;

2, oven dry water based paint;

3, cleaning machine part;

4, cooling die and stove;

Extract flue gas when 5, welding;

6, ventilate in the cargo ship cabin storehouse;

But owing to have certain difficulty as the compressed-air actuated conveying of power source, especially existing air amplifier architecture is too complicated, make its application in industries such as household electric appliance, factory's dedusting, mine ventilation be restricted, and because complex structure, form by a plurality of parts, the size of air ejection amplifier is subjected to structure influence, and the diameter of air ventilation path generally is no more than 100mm, can not satisfy the demand to air ejection amplification on a large scale.So efficient, energy-conservation air amplifier does not obtain using more widely, and this is that aerodynamic force is used a big matter of regret, this need be simple and easy to originally usefulness, air amplifier that cost is low is promoted the use of.

Summary of the invention

Problem to be solved in the utility model is: existing air amplifier needs a kind of structure simpler because complex structure is not widely used, and the air amplifier of function admirable enlarges its application area.

The technical solution of the utility model is: the air ejection amplifier, it is characterized in that forming by interior ring and outer shroud, the inside of interior ring constitutes the injection air flue, one end is the injection air inlet, one end is an air-out, interior ring is connected with outer shroud is chimeric, looping chamber between the two, ring is not closed at injection air inlet place and outer shroud wherein, the looping slit, and the gap width of annulus is even, width range is 0.5～5.0mm, gap opening is towards the injection air flue, and interior ring is the coanda surface by the internal surface that the place, annulus extends in the ring, and outer shroud is provided with the compressed air inlet that is communicated with annular chamber.

Further, the outer ring surface inwardly one side of ring is located in the annulus, evenly is provided with convex tendon along circumference, and the height of projection of described convex tendon is identical with the gap width of annulus.

Preferred described convex tendon is a strip, and its width is with highly identical, and length is decided with the outer shroud physical dimension, and the strip convex tendon is equidirectional with the air-flow by the annulus, evenly is provided with 36 strip convex tendons along the outer shroud circumference.

The ring inside diameter ranges is 100mm-2200mm in the utility model.

Interior ring is connected by tongue-and-groove and tenon are chimeric with outer shroud.

As preferably, the gap width of annulus is 1.0mm.

The utility model structure is more simple, and ring and two parts of outer shroud in critical piece has only are connected by tongue-and-groove and tenon are chimeric, assemble very convenient; Pressurized air is entered in the annular chamber by compressed air inlet, and this compressed gas source is located throttling in the annulus, the thin air layer of consequent high speed by the coanda surface adsorption to interior ring madial wall, thereby produce 90 ° turn to, by interior ring.The generation of area of low pressure, ring center in the process of ring madial wall caused in described air flow stream was crossed, thereby attract a large amount of surrounding atmosphere to pour in from the injection air inlet, these inhaled airs expand, speed increases, the injection air flue that ring constitutes in the compressed and supplied air passes, when the outlet of the utility model air ejection amplifier does not connect conduit, also can bring more ambient airs into from the air-flow that air-out comes out.Final outlet tolerance: the air of inhaled air+compressed and supplied air+carry secretly can surpass 30-120 with the ratio of inlet air demand: 1 (under the standard state).

Because the utility model is simple in structure, is easy to realize multiple size, the dimensional changes scope reaches 100mm-2200mm dimension level, can be applicable to multiple occasion, as:

1) use on household electric appliance, the ring internal diameter is generally got the 300mm order of magnitude in this moment;

2) metallurgical steel-making dedusting, interior ring internal diameter can reach the 2200mm order of magnitude, and this is that the structure of existing air ejection amplifier can't realize;

3) mine ventilation, house are with air-supply etc., and the ring internal diameter is generally got the 800mm order of magnitude in this occasion, and prior art need arrange that generally a plurality of air ejection amplifiers could realize the effect of one of the utility model.

Description of drawings

Fig. 1 is the utility model structural principle schematic representation.

Fig. 2 is that schematic representation is launched in the part that ring is connected with outer shroud in the utility model.

Fig. 3 is the convex tendon schematic representation on the utility model outer shroud.

Embodiment

As Fig. 1 and Fig. 2, ring 1 and outer shroud 2 in the utility model comprises, interior ring 1 constitutes the injection air flue, and an end is an injection air inlet 5, one end is an air-out 6, in ring 1 and the outer shroud 2 chimeric annular chambers 3 that connect and compose, wherein in ring 1 not closed at injection air inlet 5 places and outer shroud 2, looping slit 7, the gap width of annulus 7 is even, width range is 0.5～5.0mm, by interior ring internal diameter size and inlet condition decision, preferred 1.0mm; Ring internal diameter in of the present utility model, just the injection air flue is decided by practical application, diameter range 100mm-2200mm, excursion reaches the dimension level, gap opening is towards the injection air flue, interior ring 1 is the coanda surface by the internal surface that 7 places, annulus extend in the ring, and outer shroud 2 is provided with the compressed air inlet 4 that is communicated with annular chamber 3.

As seen the utility model structure is extremely simple, formed annular chamber 3 is used for receiving pressurized air between the inner and outer rings, spouting from the annulus 7 that inner and outer rings forms again, swiftly flowing pressurized air is along the surperficial steering flow of coanda (Conada Effect) that is provided with near annulus 7, the coanda surface is a kind of known surface, and fluid shows Coanda effect when flowing through this surface.Fluid is tending towards flowing through closely this surface, the outer air of air ejection amplifier is then aspirated the formation injection by said flow and carries air-flow secretly and form delivery air stream together, the inner injection air flue of ring in flowing through, this delivery air stream can reach compressed-air actuated 30-120 times (under the standard state) of input.

As Fig. 3, outer shroud 2 towards the one side of interior ring 1 in the annulus 7 places, evenly be provided with convex tendon 8 along circumference, the height of projection of described convex tendon 8 is identical with the gap width of annulus 7.Convex tendon 8 is used to keep the gap width of annulus 7 even, plays the effect of supporting annulus 7 simultaneously.Preferred convex tendon 8 is a strip, and its width is with highly close, and length is decided with the outer shroud physical dimension, and strip convex tendon 8 is equidirectional with the air-flow by annulus 7, plays the guide functions to air-flow simultaneously, along outer shroud 2 circumference 36 strip convex tendons 8 is set evenly.

The utility model assembling is very convenient, and interior ring 1 is connected by tongue-and-groove and tenon are chimeric with outer shroud 2, and as shown in Figure 2, interior ring 1 one ends are the coanda surface, and the other end is provided with tongue-and-groove 11, and correspondence is provided with tenon 21 on the outer shroud 2, looping chamber, chimeric back 3.

The above only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.

Claims

1. air ejection amplifier, it is characterized in that forming by interior ring (1) and outer shroud (2), the inside of interior ring (1) constitutes the injection air flue, one end is injection air inlet (5), one end is air-out (6), interior (1) and chimeric connection of outer shroud (2) encircled, looping chamber (3) between the two, ring (1) is located with outer shroud (2) not closed at injection air inlet (5) wherein, looping slit (7), the gap width of annulus (7) is even, width range is 0.5～5.0mm, gap opening is towards the injection air flue, and the internal surface that interior ring (1) is located to extend in the ring by annulus (7) is the coanda surface, and outer shroud (2) is provided with the compressed air inlet (4) that is communicated with annular chamber (3).

2. air ejection amplifier according to claim 1, it is characterized in that outer shroud (2) towards the one side of interior ring (1) in the annulus (7) locate, evenly be provided with convex tendon (8) along circumference, the height of projection of described convex tendon (8) is identical with the gap width of annulus (7).

3. air ejection amplifier according to claim 2, it is characterized in that described convex tendon (8) is a strip, its width is with highly identical, and strip convex tendon (8) is equidirectional with the air-flow by annulus (7), evenly is provided with 36 strip convex tendons (8) along outer shroud (2) circumference.

4. according to claim 1 or 2 or 3 described air ejection amplifiers, it is characterized in that interior ring (1) inside diameter ranges is 100mm-2200mm.

5. according to claim 1 or 2 or 3 described air ejection amplifiers, it is characterized in that interior ring (1) and tenon (21) chimeric be connected of outer shroud (2) by tongue-and-groove (11).

6. air ejection amplifier according to claim 4 is characterized in that interior ring (1) and tenon (21) chimeric be connected of outer shroud (2) by tongue-and-groove (11).

7. according to claim 1 or 2 or 3 described air ejection amplifiers, the gap width that it is characterized in that annulus (7) is a 1.0mm dimension level.

8. air ejection amplifier according to claim 4, the gap width that it is characterized in that annulus (7) are 1.0mm dimension level.

9. air ejection amplifier according to claim 5, the gap width that it is characterized in that annulus (7) are 1.0mm dimension level.

10. air ejection amplifier according to claim 6, the gap width that it is characterized in that annulus (7) are 1.0mm dimension level.