CN104047892A - Air compressor with variable-pitch spiral blades - Google Patents
Air compressor with variable-pitch spiral blades Download PDFInfo
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- CN104047892A CN104047892A CN201310102331.1A CN201310102331A CN104047892A CN 104047892 A CN104047892 A CN 104047892A CN 201310102331 A CN201310102331 A CN 201310102331A CN 104047892 A CN104047892 A CN 104047892A
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- spiral shell
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Abstract
The invention provides a fluid compression mechanism, which is applied to an air compression system in an aero-engine. The fluid compression mechanism mainly consists of a sealed case, spiral strip-shaped blades (hereinafter referred to as spiral blades), a center cone body and the like, wherein the spiral blades are spirally wound on the center cone body, and the pitch of the spiral blades is gradually changed. Airflow or other fluid working media can be continuously and smoothly compressed, and in addition, a simple and compact structure is realized.
Description
Technical field
The present invention relates to fluid compression technical field, particularly relate to the gas compressor in aeroturbine supercharged engine.
Background technique
Existing aeroturbine supercharged engine, its compressing mechanism is mainly to rely on the acting of multistage fan rotor convection cell, rely on stator choked flow guiding, to reach pressurized effect, fan propeller number is more, fan propeller and stator are staggered, complicated structure, manufactures with mounting process and requires harshness, and air current flow surface friction drag is larger, and easily there is the vibration problems such as flutter, have a strong impact on total pressure recovery coefficient.
Summary of the invention
In order to overcome the deficiency in above-mentioned technology, the invention provides a kind of variable pitch screw blade compresses mechanism, be called for short and become spiral shell leaf fluid compression engine, so that the gas compressor mechanism simple in aeroengine, compression process is more smooth, efficient.
The technical solution adopted in the present invention is, adopt some spiral windings in the spiral shape blade (hereinafter to be referred as spiral shell leaf) of conical inner body, pitch gradual change, and cylinder-like shell, conical inner body, form some air-flow paths from engine shaft head spiral winding to rear portion, make the compression of air-flow smooth continuously.
Compared with existing aero-engine compressor, the technical program has the following advantages:
1 designs simplification, thrust weight ratio increases.Blade quantity is equivalent to traditional compressor first order blade quantity, has saved manufacture cost, is also convenient to Inspection and maintenance; Spiral shell leaf is " rotor " and " stator ", saves many component, and weight also decreases, and thrust weight ratio increases.
2 structural strengths improve, and material requirements is reduced.Compare traditional compressor blade and only have one end to be arranged on conical inner body, the blade of this kind of Novel pressure mechanism of qi is from first to last fixedly connected with conical inner body, shell, very firm, and flutter can occur hardly for it, is also not easy fracture or be out of shape.
3 pairs of manufacture process requirement reduce.Manufacture, the installation requirement of traditional compressor to fan blade is all very harsh, and this Novel pressure mechanism of qi blade is manufactured and installation all wants simple.
4 spiral shell leaves are fixedly connected with shell seamless, have avoided in conventional engines, encircling the disorder and the retardance that keep away boundary layer and blade profile boundary layer blending formation, substantially do not have secondary flow loss.
5 integral blade quantity are few and have the effect of stator blade and movable vane concurrently, and it is coherent that acting to air-flow, guiding and compression continue, and profile loss is little, and air-flow intensification is little, and compressibility is high.
6 is simple in structure firm, and stability margin is high.
Brief description of the drawings
Fig. 1 is left view
Fig. 2 is front elevation
Fig. 3 is Luo Ye three-dimensional projection
Fig. 4 is the three-dimensional projection of gas compressor front elevation
Fig. 5 is the 3 d effect graph of gas compressor oblique drawing
In figure, 1. shell, 2. spiral shell leaf, 3. conical inner body.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described
Shell (1) is open circles tubular, is fixedly mounted on spiral shell leaf (2) periphery, can rotate with motor, prevents that in compressor, air-flow, radially toward flowing away, seals.For turbofan engine, outer culvert fan can be fixedly mounted on to shell (1) upper, as Fig. 3 shows.
Spiral shell leaf (2) is spiral shape, is wound around around conical inner body (3), extends vertically, is similar to the screw thread on screw rod, and its pitch is dwindled vertically gradually, and its change curve and compressor pressure ratio have a direct impact.The sectional shape of spiral shell leaf (2) is similar to equal thickness cross section, slightly bandy radian, and under high-temperature condition, blade can increase because of expansion radian, can reduce radial expansion like this.A succession of fan blade that spiral shell leaf (2) is tightly connected before and after can regarding as, a rear blade pushes the air-flow compression of coming to last blade and and then passes to a rear blade, has realized continuous compression.Between adjacent two spiral shell leaves (2), form an air-flow path that is spirally extended to afterbody from gas compressor head.For every passage, the inner side surface of the front one spiral shell leaf of passage pushes vertically to air-flow, and effect is equivalent to " rotor " in conventional engines; Due to phase difference being installed, rear one spiral shell leaf and front together with have a faint angle between spiral shell leaf, if the angle (angle of attack) of certain some tangent line and axle is e1, e2 on the adjacent two coaxial upper blade faces of spiral shell leaf (2), e2 is always greater than e1, namely, one spiral shell leaf blade face than front together more " suddenly " a bit, the air-flow that last spiral shell leaf is pushed plays deceleration supercharging and leading role, this effect continues through whole piece air-flow path, just as one " like the shadow following the person stator ".Therefore in this kind of compressing mechanism, spiral shell leaf (2) is " rotor " and " stator ", and its inner side surface plays " rotor " effect, and outer side surface plays " stator " effect.Axial spacing between adjacent two spiral shell leaves (2) dwindles and diminishes gradually with pitch, is totally presented as narrowing of passage.Spiral shell leaf (2) head radially shrinks in conical inner body (3) head, and the part of this convergence is exposed to shell (1) above, makes it can suck from the side gas; Spiral convergence makes it see all have smooth sweepback angle from positive, side, is difficult for producing shock wave, can receive the incoming flow that flow velocity is higher and rotate with higher speed.Spiral shell leaf (2) head is relatively easily impaired, can consider to separate manufacture with its aft section, to change.
Conical inner body (3) is installed on transmission shaft, identical with the cone of existing gas compressor, and its radius increases vertically gradually, plays and strengthens compression effectiveness effect.
Working principle: (in the present embodiment, spiral shell leaf (2) is counterclockwise against spiral shell leaf (2) winding direction when engine shaft, motor turns to as clockwise) when uniform rotation, front one spiral shell leaf inner side surface does work to air-flow, gas is pushed vertically, and after air-flow is subject to, stopping with leading role of one spiral shell leaf outer side surface advances along passage.Flowing for this, take the external world as reference, and air-flow is straight ahead vertically because motor is not given its component that points to spiral shell leaf (2) inner side surface, so air-flow do not pivot, rotation be helical duct itself.In the process of advancing vertically at air-flow, it is constant having an amount, and to spend time of each circle (360 degree) helical duct be all identical to air flow stream, equal the engine rotation cycle, and pitch diminishes gradually, so the flow velocity of air-flow is reducing.Another amount reducing is the volume of air-flow, because adjacent two spiral shell blade gap distances are reducing, conical inner body (3) is also reducing with the spacing of shell (1), and therefore in passage, the volume of unit air-flow is reducing, and pressure rises.In addition, in some use occasion, also the Changing Pattern of pitch can be turned around, make it play decompression diffusion.
Claims (1)
1. a fluid mechanism mechanism, formed by shell, spiral shell leaf and conical inner body, it is characterized in that, shell is arranged on spiral shell leaf periphery, spiral shell leaf is arranged on conical inner body along rotating shaft direction spiral winding, spiral shell leaf is spiral shape, and its pitch changes according to certain rules, and shell, some spiral shell leaves and conical inner body be common forms some the fluid passages from rotatingshaft head spiral winding to rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102331.1A CN104047892A (en) | 2013-03-15 | 2013-03-15 | Air compressor with variable-pitch spiral blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102331.1A CN104047892A (en) | 2013-03-15 | 2013-03-15 | Air compressor with variable-pitch spiral blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104047892A true CN104047892A (en) | 2014-09-17 |
Family
ID=51501163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310102331.1A Pending CN104047892A (en) | 2013-03-15 | 2013-03-15 | Air compressor with variable-pitch spiral blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104047892A (en) |
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2013
- 2013-03-15 CN CN201310102331.1A patent/CN104047892A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Liang Huashan Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Liang Huashan Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Liang Huashan Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |