CN101539034B - Fixed blade device with adjustable bend angle in circumferential direction - Google Patents
Fixed blade device with adjustable bend angle in circumferential direction Download PDFInfo
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- CN101539034B CN101539034B CN2009100494072A CN200910049407A CN101539034B CN 101539034 B CN101539034 B CN 101539034B CN 2009100494072 A CN2009100494072 A CN 2009100494072A CN 200910049407 A CN200910049407 A CN 200910049407A CN 101539034 B CN101539034 B CN 101539034B
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- driven gear
- circumferential direction
- fixed
- bend angle
- blade device
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Abstract
The invention relates to a fixed blade device with adjustable bend angle in circumferential direction, belonging to the technical field of impeller machinery, comprising a blade, a wheel boss, a stream guide hammer, a front end plate, driving gears, driven gears, shim blocks; wherein, the driven gears and the shim blocks fixed on the stream guide hammer form the wheel boss, the back ends of the shim blocks are fixed on the stream guide hammer, the driven gears are embedded between the shim blocks, the blade is fixed on the driven gears, the driving gears are arranged in the center the driven gear encircles and are meshed with the driven gears, the front end plate and the shim blocks are fixed together by screws; the invention features simple structure and rational design; in addition, on the precondition of retaining the original blade structure parameters, gear drive structure is arranged inside the wheel boss to achieve the purpose that the bend angle in circumferential direction can be continuously adjusted, thus simultaneously ensuring that the intersection line of the blade at the wheel boss can remain unchanged.
Description
Technical field
What the present invention relates to is a kind of mechanism of impeller machinery technical field, specifically is a kind of fixed blade device with adjustable bend angle in circumferential direction.
Background technique
Often have multistage blade in turbomachines such as compressor, aeroengine, the interlobate mutual interference of its sound will cause the decline of turbomachine aeroperformance and the increase of noise.Especially on aeroengine, interaction noise between the one-level stator blade of supply fan and by-pass air duct is the main noise of aeroengine, curved plunder blade technology and be successfully applied on the supply fan, one-level stator blade structure also should be done corresponding adjustment, and its circumferential bent angle should be complementary with the movable vane of front.
Find that through literature search the suitable circumferential skewing of blade can effectively enlarge the turbomachine stable operation range, postpone turbomachine stall, reduce the interlobate interaction noise of sound prior art.Edmane Envia (Design selection and analusis of a swept and leaned stator concept.Journal of Sound and vibration, 1999,228 (4): 793-836.) once did relevant experimental research and confirm, antecurvature 30 ° stator blade can reduce the sound interaction noise, it has been made two blades and has had certain circumferentially stationary blade wheel of bent angle, but the circumferential bent angle of the blade on this impeller is fixed.Also there is not the continuously adjustable stator blade impeller of the circumferential bent angle of blade on the market.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, a kind of fixed blade device with adjustable bend angle in circumferential direction is proposed, make it pass through the angle of adjustable vane circumferential skewing, reasonably arrange in pairs or groups with the movable vane wheel, improve flowing between the sound impeller effectively, stablize the turbomachine operating range, reduce the sound interaction noise, improve the performance of whole unit.
The present invention is achieved by the following technical solutions:
The present invention includes: blade, wheel hub, water conservancy diversion vertebra, front shroud, driving gear, driven gear, contract piece, driven gear and the contract piece that is fixed on the water conservancy diversion vertebra constitute wheel hub, contract piece rear end is fixed on the water conservancy diversion vertebra, driven gear is embedded between the contract piece, and vanes fixed is on driven gear, and driving gear is arranged on the center that driven gear centers on, with the driven gear engagement, front shroud and contract piece are fixed together by screw respectively.
Described contract piece, the profile that forms between the adjacent contract piece is tangent with the outer tip circle of driven gear that embeds wherein, and this driven gear axle center makes driven gear to move along its axial direction between the line of the line of this profile outside two-end-point and inboard two-end-point.
Described contract piece, the consistency of thickness of its length and driving gear, driven gear.
Described wheel hub is enclosed within driven gear and contract piece outside, and wheel hub is provided with the vane airfoil profile that allows blade to pass and cracks, and blade and driven gear rotate in a circumferential direction around the axis of driven gear.
Described wheel hub, circle is tangent with the contract piece in it, and can circumferentially slide on the contract piece.
Described front shroud, it is provided with some through holes, and the running shaft of driving gear and driven gear can be plugged in the corresponding through hole, and freely rotates therein.
Described front shroud is provided with knob, and the running shaft of this knob and driving gear is fixed together,
Described driving gear is the involute spur gear of full-depth tooth structure.
Described driven gear is the operative gear structure, and the tooth punching scope is 120 degree.The modulus of driven gear and driving gear, gear consistency of thickness.
The present invention drives driving gear by the knob on the rotation front shroud and rotates, driving gear drives the running shaft rotation of driven gear around driven gear then, when driven gear rotates, be fixed on blade on the driven gear also along with blade rotates around the running shaft of this driven gear, thereby reach the purpose of the circumferential bent angle of continuous adjustment blade.
Compared with prior art, the present invention is simple in structure, and is reasonable in design, under the prerequisite that keeps original impeller structure parameter, by gear transmission structure being set in wheel hub inside, reach the circumferential bent angle continuously controllable purpose of blade, guaranteed that simultaneously blade remains unchanged at the intersecting line of wheel hub.
Description of drawings
Fig. 1 is impeller overall structure figure of the present invention;
Fig. 2 is an impeller front view of the present invention;
Fig. 3 is a front shroud stereogram of the present invention;
Fig. 4 is the blade of the present invention schematic representation that rotates in a circumferential direction;
Among the figure: blade 1, wheel hub 2, water conservancy diversion vertebra 3, front shroud 4, driving gear 5, driven gear 6, contract piece 7.
Embodiment
As shown in Figure 1, 2, present embodiment comprises: blade 1, wheel hub 2, water conservancy diversion vertebra 3, front shroud 4, driving gear 5, driven gear 6, contract piece 7, driven gear 6 and the contract piece 7 that is fixed on the water conservancy diversion vertebra 3 constitute wheel hub 2, contract piece 7 rear ends are fixed on the water conservancy diversion vertebra 3, driven gear 6 is embedded between the contract piece 7, and blade 1 is fixed on the driven gear 6, and driving gear 5 is arranged on the center that driven gear 6 centers on, respectively with driven gear 6 engagement, front shroud 4 and contract piece 7 are fixed together by screw.
Described contract piece 7, the profile that forms between the adjacent contract piece 7 is tangent with the driven gear 6 outer tip circles that embed wherein, and these driven gear 6 axle center make driven gear 6 to move along its axial direction between the line of the line of this profile outside two-end-point and inboard two-end-point.
Described contract piece 7, the consistency of thickness of its length and driving gear 5, driven gear 6.
Described front shroud 4, it is provided with some through holes, and the running shaft of driving gear 5 and driven gear 6 can be plugged in the corresponding through hole, and freely rotates therein.
Described driven gear 6 is the operative gear structure, and the tooth punching scope is 120 degree.The modulus of the profile of tooth of this driven gear 6 and driving gear 5, gear thickness are with consistent.
Described wheel hub 2 is enclosed within driven gear 6 and contract piece 7 outsides, the aerofoil profile that blade 1 passes is set on the wheel hub 2 cracks, and blade 1 and driven gear 6 rotate in a circumferential direction around the axis of driven gear 6.
Described wheel hub 2, circle is tangent with contract piece 7 in it, and can circumferentially slide on contract piece 7.
As shown in Figure 2, described driving gear 5 is the full-depth tooth structure, and gear is an involute spur gear, and the outer outside diameter circle D1 of gear is about 1/3 of wheel hub 2 interior circular diameter D, and the thickness of gear is selected according to the chord length of blade 1, and present embodiment is decided to be 1.2 times blade 1 chord length.
As shown in Figure 3, described front shroud 4 is provided with knob 8, and knob 8 is fixed together with the running shaft of driving gear 5, and the outer diameter D 5 of knob is approximately 1/5D.Described front shroud 4, its outer diameter D 2 is consistent with the inside diameter D of wheel hub 2, and the thickness that the length of wheel hub 2 equals front shroud 4 adds the thickness that cogs.Have aperture on it, the center of the aperture running shaft with driving gear and driven gear respectively is corresponding, and the diameter D3 of aperture is consistent with the diameter D4 of gear running shaft.
Present embodiment by rotary knob 8, drives driving gear 5 in when work, and driving gear 5 drives driven gears 6, thereby blade 1 is rotated in a circumferential direction around the axis of driven gear 6, has realized that blade 1 circumferential bent angle can adjust the purpose of variation.As shown in Figure 4, observe from the impeller front end, blade 1 be rotated counterclockwise be defined as circumferentially antecurvature, otherwise, be defined as palintrope.
After the blade 1 of present embodiment carried out circumferential skewing, the sound interaction noise had reduced 3-4dB.In high rate turbine machinery,,, make it to be complementary, reach optimum efficiency with the movable vane of front by regulating the circumferential bent angle of stator blade as all using on gas compressor, the aeroengine.During stator blade work, the circumferential angle that the knob on the rotation front shroud 4 is regulated stator blade, and the aeroperformance and the noise characteristic of assessment sound leaf this moment coupling, selecting the static blade angle of effect optimum is final adjusting angle.
Claims (9)
1. fixed blade device with adjustable bend angle in circumferential direction, it is characterized in that, comprise: blade, wheel hub, the water conservancy diversion vertebra, driving gear, driven gear, it is characterized in that, also comprise: front shroud, the contract piece, driven gear and the contract piece that is fixed on the water conservancy diversion vertebra constitute wheel hub, and contract piece rear end is fixed on the water conservancy diversion vertebra, and driven gear is embedded between the contract piece, vanes fixed is on driven gear, driving gear is arranged on the center that driven gear centers on, and with the driven gear engagement, front shroud and contract piece are fixed together by screw respectively, wheel hub is enclosed within driven gear and contract piece outside, the aerofoil profile that blade passes is set on the wheel hub cracks.
2. fixed blade device with adjustable bend angle in circumferential direction according to claim 1, it is characterized in that: the profile that forms between two adjacent described contract pieces is tangent with the outer tip circle of driven gear that embeds wherein, and this driven gear axle center is between the line of the line of this profile outside two-end-point and inboard two-end-point.
3. fixed blade device with adjustable bend angle in circumferential direction according to claim 2 is characterized in that: the length of described contract piece and driving gear consistency of thickness.
4. fixed blade device with adjustable bend angle in circumferential direction according to claim 1 is characterized in that: described front shroud is provided with some through holes, and the running shaft of driving gear and driven gear can be plugged in the corresponding through hole, and freely rotates therein.
5. according to claim 1 or 4 described fixed blade device with adjustable bend angle in circumferential direction, it is characterized in that: described front shroud is provided with knob, and the running shaft of this knob and driving gear is fixed together.
6. according to claim 1 or 3 described fixed blade device with adjustable bend angle in circumferential direction, it is characterized in that: described driving gear is the involute spur gear of full-depth tooth structure, and its thickness is 1.2 times of blade chord length.
7. fixed blade device with adjustable bend angle in circumferential direction according to claim 1 is characterized in that: described driven gear is the part toothing.
8. fixed blade device with adjustable bend angle in circumferential direction according to claim 7 is characterized in that: the tooth punching scope of described driven gear is 120 degree.
9. fixed blade device with adjustable bend angle in circumferential direction according to claim 1 is characterized in that: the interior circle and the contract piece of described wheel hub are tangent, circumferentially slide on the contract piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100494072A CN101539034B (en) | 2009-04-16 | 2009-04-16 | Fixed blade device with adjustable bend angle in circumferential direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100494072A CN101539034B (en) | 2009-04-16 | 2009-04-16 | Fixed blade device with adjustable bend angle in circumferential direction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101539034A CN101539034A (en) | 2009-09-23 |
| CN101539034B true CN101539034B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100494072A Expired - Fee Related CN101539034B (en) | 2009-04-16 | 2009-04-16 | Fixed blade device with adjustable bend angle in circumferential direction |
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| Country | Link |
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| CN (1) | CN101539034B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173571B (en) * | 2020-02-21 | 2020-12-25 | 浙江鼎兴企业管理有限公司 | Turbine with adjustable blade angle |
| CN114412657B (en) * | 2020-10-28 | 2023-08-08 | 中国航发商用航空发动机有限责任公司 | Aero-engine |
| CN113682462A (en) * | 2021-09-18 | 2021-11-23 | 上海交通大学 | Propulsion unit and electric drive ducted fan propulsion system with adjustable inlet pre-rotation guide vanes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767247A (en) * | 1987-02-24 | 1988-08-30 | Westinghouse Electric Corp. | Apparatus and method for preventing relative blade motion in steam turbine |
| CN1451076A (en) * | 2000-03-13 | 2003-10-22 | 联合讯号公司 | Variable geometry Turbocharger |
| CN1912353A (en) * | 2005-07-20 | 2007-02-14 | 联合工艺公司 | Gear train variable vane synchronizing mechanism for inner diameter vane shroud |
| EP1775424A2 (en) * | 2005-10-17 | 2007-04-18 | United Technologies Corporation | Gas turbine engine blade tip clearance apparatus and method |
-
2009
- 2009-04-16 CN CN2009100494072A patent/CN101539034B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767247A (en) * | 1987-02-24 | 1988-08-30 | Westinghouse Electric Corp. | Apparatus and method for preventing relative blade motion in steam turbine |
| CN1451076A (en) * | 2000-03-13 | 2003-10-22 | 联合讯号公司 | Variable geometry Turbocharger |
| CN1912353A (en) * | 2005-07-20 | 2007-02-14 | 联合工艺公司 | Gear train variable vane synchronizing mechanism for inner diameter vane shroud |
| EP1775424A2 (en) * | 2005-10-17 | 2007-04-18 | United Technologies Corporation | Gas turbine engine blade tip clearance apparatus and method |
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| Publication number | Publication date |
|---|---|
| CN101539034A (en) | 2009-09-23 |
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Granted publication date: 20101208 Termination date: 20130416 |