CN109974032A - A kind of bleed structure of auxiliary power unit - Google Patents
A kind of bleed structure of auxiliary power unit Download PDFInfo
- Publication number
- CN109974032A CN109974032A CN201910217909.5A CN201910217909A CN109974032A CN 109974032 A CN109974032 A CN 109974032A CN 201910217909 A CN201910217909 A CN 201910217909A CN 109974032 A CN109974032 A CN 109974032A
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- Prior art keywords
- bleed
- wall
- inner liner
- baffle rings
- burner inner
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/06—Arrangement of apertures along the flame tube
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The disclosure provides a kind of bleed structure of auxiliary power unit, comprising: outer casing, interior casing and between the first chamber that is formed, first chamber has inlet end and gas supply end；Diffuser positioned at inlet end side forms circumferentially continuous inlet channel between diffuser and outer casing；Sustainer air supply channel positioned at gas supply end side；Burner inner liner in first chamber, burner inner liner include flame drum outer wall and burner inner liner inner wall, and the outer wall and inner wall of burner inner liner offer multiple burner inner liner air inlets, and flame drum outer wall and inner wall constitute second chamber；The baffle rings in first chamber between burner inner liner and sustainer air supply channel, one end of baffle rings are connect with the inner wall of outer casing, and the other end is connect with the inner wall of interior casing, and bleed hole is offered in baffle rings.The service life that the bleed structure of the disclosure can effectively reduce exciting effect, improve auxiliary power unit.
Description
Technical field
This disclosure relates to aero-engine field, and in particular to a kind of bleed structure of auxiliary power unit.
Background technique
The starting of aero-engine helps the company for establishing runner interior air-flow firstly the need of initial operation is realized by external force
Continuous working condition.In high thrust, high-power aero-engine, this external force usually pushes air turbine to start by compressed air
Machine rotates to provide.The equipment that auxiliary power unit is just to provide compressed air, it is a kind of Small Gas Turbine Engine, birth
It is born in the 1950s.Its use not only meets high thrust/power engine fast starting demand, also reduces winged
Machine also increases safety in-flight to the dependence of ground-support equipment, it has also become essential on modern aircraft
One of airborne equipment.
Currently used auxiliary power unit includes core compressor output compressed air and load compressor output compression
Air two types.For this auxiliary power unit of core compressor output compressed air, it draws in combustion chamber runner
Air is partially compressed, effect is that providing bleed to air turbine starter starts sustainer (ground and aerial).For this
Kind auxiliary power unit, the design of bleed structure can effectively change its bleed distribution situation, thus to auxiliary power unit
Performance has significant impact.
However, the design of the bleed configuration aspects of core compressor is less at this stage, circumferential weld bleed structure is generallyd use, it should
Structure has the shortcomings that bleed is uneven, is easy to produce exciting effect, makes making for burner efficiency decline and auxiliary power unit
Use service life reduction.
Therefore, a kind of bleed structure of new auxiliary power unit is needed, to solve problem of the prior art.
It is noted that information disclosed in aforementioned background art part is only used for reinforcing understanding background of the invention, because
This it may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
One main purpose of the disclosure is to overcome at least one defect of the above-mentioned prior art, and providing one kind can subtract
The effect of small exciting, the auxiliary power unit improved service life bleed structure.
To achieve the goals above, the disclosure adopts the following technical scheme that
An aspect of this disclosure provides a kind of bleed structure of auxiliary power unit, comprising:
Casing including outer casing and interior casing forms first chamber between outer casing and interior casing, and first chamber has
There are inlet end and gas supply end；Diffuser positioned at inlet end side forms circumferentially continuous air inlet between diffuser and outer casing
Channel；Sustainer air supply channel positioned at gas supply end side；Burner inner liner in first chamber, the burner inner liner include flame
Drum outer wall and burner inner liner inner wall, the outer wall of burner inner liner and the inner wall of burner inner liner offer multiple burner inner liner air inlets, burner inner liner
Outer wall and burner inner liner inner wall constitute second chamber；The gear in first chamber between burner inner liner and sustainer air supply channel
Plate ring, one end of baffle rings are connect with the inner wall of outer casing, and the other end is connect with the inner wall of interior casing, and is offered in baffle rings
Bleed hole.
In accordance with one embodiment of the present disclosure, multiple bleed holes of circumferentially discrete distribution are offered in baffle rings, and
It is less than the aperture in the bleed hole far from sustainer air supply channel close to the aperture in the bleed hole of sustainer air supply channel.
In accordance with one embodiment of the present disclosure, multiple bleed holes are uniformly distributed circumferentially in baffle rings.
In accordance with one embodiment of the present disclosure, the bore dia range in bleed hole is 5mm~35mm.
In accordance with one embodiment of the present disclosure, circumferentially the quantity in multiple bleed holes of discrete distribution is 15~45.
In accordance with one embodiment of the present disclosure, radially distributed multilayer bleed aperture layer is also provided in baffle rings, often
Layer bleed aperture layer includes multiple bleed holes of circumferentially discrete distribution.
In accordance with one embodiment of the present disclosure, the interlamellar spacing in the multilayer bleed hole of radially discrete distribution is identical.
In accordance with one embodiment of the present disclosure, the quantity of the bleed aperture layer of radially discrete distribution is 1~6 layer.
In accordance with one embodiment of the present disclosure, baffle rings with a thickness of 0.5mm~3mm.
As shown from the above technical solution, the advantages of bleed structure for the auxiliary power unit that the disclosure proposes and good effect
It is:
The bleed structure for the auxiliary power unit that the disclosure proposes is set using the perforated baffle ring structure fixed with casing
Meter, can effectively reduce baffle rings as bleed initial vibration and it is uneven caused by exciting act on, and then improve auxiliary
The service life of power device.
Detailed description of the invention
In order to which the embodiment of the present disclosure can be easier to understand, appended attached drawing is cooperated to elaborate below.It should be noted that root
According to industrial classical example, all parts are not necessarily drawn to scale, and are only used for the purpose illustrated.In fact, being
Make discussion clear understandable, the size of all parts can be arbitrarily expanded or reduced.
Fig. 1 illustratively shows a kind of traditional bleed structure division schematic diagram of auxiliary power unit；
Fig. 2 shows the bleed structural profiles of the auxiliary power unit of the illustrative embodiments proposed according to the disclosure
Schematic diagram；
Fig. 3 be Fig. 2 shows bleed structure part isometric structural schematic diagram；
Fig. 4 representatively illustrates the top view of the baffle rings of an illustrative embodiments；
Fig. 5 representatively illustrates the top view of the baffle rings of another exemplary embodiment.
Wherein, the reference numerals are as follows:
101,201: outer casing；
102,202: interior casing；
103,203: the first cavity；
104,204: diffuser；
105,205: sustainer air supply channel；
206: burner inner liner；
1061,2061: flame drum outer wall；
1062,2062: burner inner liner inner wall；
1063,2063: burner inner liner air inlet；
107,207: second chamber；
108,208: baffle rings；
2081,2082,2083: bleed aperture layer；
I, IV: inlet channel；
II, V: outlet passageway；
III: bleed circumferential weld；
VI: bleed hole.
Specific embodiment
The exemplary embodiments for embodying disclosure features and advantages will describe in detail in the following description.It should be understood that this
Open can have various variations in different embodiments, all not depart from the scope of the present disclosure, and it is therein illustrate and
Attached drawing is inherently illustrative, rather than to limit the disclosure.
It in being described below the different illustrative embodiments to the disclosure, is carried out referring to attached drawing, the attached drawing is formed
A part of this disclosure, and the exemplary knot of difference of many aspects of the achievable disclosure is wherein shown by way of example
Structure, system and step.It should be understood that other certain parties of component, structure, exemplary means, system and step can be used
Case, and structural and functional modification can be carried out without departing from disclosure range.Although moreover, can in this specification
Using term " on ", " between ", " within " etc. the different example features and element of the disclosure are described, but these terms
With in this article merely for convenient, for example, with reference to the accompanying drawings described in exemplary direction.Any content in this specification is not
The specific three dimensional direction for being interpreted as Structure of need is just fallen within the scope of the disclosure.
Refering to fig. 1, a kind of traditional bleed structure division schematic diagram of auxiliary power unit is schematically illustrated.Wherein
The bleed structure includes casing, which includes an outer casing 101 and interior casing 102, between outer casing 101 and interior casing 102
Hollow first chamber 103 is formed, which has inlet end and gas supply end.Diffuser is equipped in inlet end side
104, circumferentially continuous inlet channel I is formed between the diffuser 104 and outer casing 101；Master is equipped in gas supply end side to start
Machine air supply channel 105, air-flow can be introduced into sustainer by the sustainer air supply channel 105.In first chamber 103 also
Including burner inner liner, which includes flame drum outer wall 1061 and burner inner liner inner wall 1062, flame drum outer wall 1061 and burner inner liner
Inner wall 1062 surrounds a hollow second chamber 107, and flame drum outer wall 1061 and burner inner liner inner wall 1062 are also provided with fire
Flame cylinder air inlet 1063,107 one end of second chamber have an open outlet passageway II, a part of gas can by burner inner liner into
Stomata, which enters inside second chamber 107, to burn, and the gas after burning is discharged by outlet passageway II.Burner inner liner 107 with
A baffle rings 108, baffle rings 108 and outer casing are additionally provided in first chamber 103 between sustainer air supply channel 105
There is annular gap, i.e. bleed circumferential weld III between 101.
When auxiliary power unit work, air-flow is entered by inlet channel I, is then divided into two parts, and a part of air-flow is logical
The bleed circumferential weld III crossed between baffle rings 108 and outer casing 101 enters sustainer air supply channel, draws to sustainer offer
Gas, the inside that another part air-flow then passes through burner inner liner air inlet 1063 into burner inner liner are burnt.
However, it is this in such a way that bleed circumferential weld carries out bleed, since sustainer air supply channel is only located at specifically
Circumferential position, therefore bleed air-flow is necessarily non-uniform in the circumferential, and then will cause into the gas for participating in burning in burner inner liner
Stream is also uneven in the circumferential, and combustibility is caused to deteriorate.On the other hand, due to the connection type of one end of baffle rings and casing
It is not fixed, baffle rings are easy to generate exciting under airflow influence, and then the failure modes such as crackle is caused to generate, and it is dynamic to reduce auxiliary
The service life of power device.
For this purpose, the present disclosure proposes a kind of bleed structures of new auxiliary power unit.Referring to Fig.2, its representative shows
The bleed structural profile illustration of the auxiliary power unit of the illustrative embodiments proposed according to the disclosure is gone out.The disclosure
The bleed structure of the auxiliary power unit of proposition is illustrated for being applied to aero-engine.Those skilled in the art
It is easily understood that for the relevant design of the disclosure to be applied in other kinds of engine, and to following specific implementations
Mode makes a variety of remodeling, addition, substitution, deletion or other variations, the auxiliary power dress that these variations are still proposed in the disclosure
In the range of the principle for the bleed structure set.
As shown in Fig. 2, in the present embodiment, the bleed structure for the auxiliary power unit that the disclosure proposes mainly includes machine
Casket, diffuser, sustainer air supply channel, burner inner liner and baffle rings.Cooperation refering to shown in Fig. 2 to Fig. 5, Fig. 3 be Fig. 2 shows
Bleed structure part isometric structural schematic diagram；Fig. 4 representatively illustrates bowing for the baffle rings of an illustrative embodiments
View；Fig. 5 representatively illustrates the top view of the baffle rings of another exemplary embodiment.Below in conjunction with above-mentioned attached drawing,
To the disclosure propose auxiliary power unit bleed structure an illustrative embodiments each chief component structure,
Connection type and functional relationship are described in detail.
In conjunction with shown in Fig. 2 and Fig. 3, in the present embodiment, which includes casing, which includes an outer casing
201 and interior casing 202, hollow first chamber 203 is formed between outer casing 201 and interior casing 202, the first chamber 203 tool
There are inlet end and gas supply end.It is equipped with diffuser 204 in inlet end side, is formed between the diffuser 204 and outer casing 201 circumferential
Continuous inlet channel IV；It is equipped with sustainer air supply channel 205 in gas supply end side, air-flow can be supplied by the sustainer
Channel 205 is introduced into sustainer.
It further include burner inner liner 206 in first chamber 203, which includes flame drum outer wall 2061 and burner inner liner
Inner wall 2062, flame drum outer wall 2061 and burner inner liner inner wall 2062 surround a hollow second chamber 207, and flame drum outer wall
2061 and burner inner liner inner wall 2062 be also provided with burner inner liner air inlet 2063, one end of second chamber 207 has open outlet
Channel V, a part of gas can be entered inside second chamber 207 by burner inner liner air inlet 2063 to burn, the gas after burning
Body can be discharged by outlet passageway V.Preferably, outlet passageway V may be designed as the annular outlet passageway with certain radian, with
It is more smoothly discharged convenient for the gas after burning.
Further, one is additionally provided in the first chamber 203 between burner inner liner 207 and sustainer air supply channel 205
A baffle rings 208, and bleed hole VI is offered in baffle rings 208.The baffle rings 208 are a ring structure, one end and outer machine
The inner wall of casket 201 connects, and the other end is connect with the inner wall of interior casing 202.Preferably, baffle rings 208 with a thickness of 0.5mm~
3mm.By the way that the both ends of baffle rings 208 are fixed with casing, can effectively reduce baffle rings due to the initial vibration of bleed and
Exciting caused by uneven acts on, and improves the service life of auxiliary power unit.
As shown in figure 4, in some embodiments, the multiple of circumferentially discrete distribution can be offered in the baffle rings 208
Bleed hole VI, and it is less than the bleed far from sustainer air supply channel close to the aperture of the bleed hole VI of sustainer air supply channel
The aperture in hole.The considerations of designing in this way is, since air-flow is in the baffle rings two sides pressure difference close to sustainer air supply channel position
It is relatively large, and the baffle rings two sides pressure difference far from sustainer air supply channel position is relatively small, when the aperture in bleed hole is equal
When identical, still can there is a problem of air flow method unevenness.By the size according to different location pressure difference, match of corresponding size
Aperture (for example, the lesser bleed hole of the biggish baffle rings location matches of pressure difference), so as to make baffle rings drawing at various locations
The air inflow of stomata is more uniform, and the uniformity of bleed distribution is greatly improved.Preferably, the bleed hole in baffle rings can be around
Central axis circular array be uniformly distributed, the bore dia range in bleed hole is 5mm~35mm, but not limited to this.
In some embodiments, radially distributed multilayer bleed aperture layer, example can also be offered in baffle rings 208
Such as, as shown in figure 5, offering radially distributed three layers of bleed aperture layer 2081,2082,2083 in baffle rings 208, every layer is drawn
Stomata layer includes multiple bleed holes of aforementioned circumferentially discrete distribution.By opening up difference in the radial direction in baffle rings 208
The fine controllable adjustment of bleed distribution may be implemented in the bleed aperture layer of the number of plies, is needed with the different work suitable for actual production
It asks.
In some embodiments, the bleed hole number of aforementioned every layer of bleed aperture layer can be 15~45.Bleed aperture layer
Between interlamellar spacing it is preferably identical so that bleed distribution more evenly.The quantity of bleed aperture layer is preferably 1~6 layer.But the disclosure
Baffle rings on bleed pore size distribution and quantity be not limited to this.
Below with reference to Fig. 2 and Fig. 3, and the description of the bleed structure to aforementioned auxiliary power unit, illustrate this public affairs
The bleed structure opened carries out the process of bleed distribution:
As shown in Fig. 2, air enters in first chamber 203 by diffuser 204, a part of air-flow passes through baffle rings 208
Auxiliary power unit is flowed out, and sustainer is entered by sustainer air supply channel 205, it is auxiliary that another part air-flow then passes through this
The burner inner liner air inlet 2063 of power-assisting device enters in burner inner liner 206.
For will cause the vibration of baffle rings 208 due to the initial vibration of air-flow by a part of air-flow of baffle rings 208
It swings.At this point, baffle rings 208 are fixed structure form, energy due to the outer casing 201 and interior casing 202 with auxiliary power unit
Persistent oscillation after baffle rings caused by this air-flow initial oscillation is enough greatly reduced, to reduce baffle ring vibration cracking failure
Risk.In addition, air-flow is relatively large in the baffle rings two sides pressure difference close to 205 position of sustainer air supply channel, air inlet is straight
Diameter is smaller, and the baffle rings two sides pressure difference far from 205 position of sustainer air supply channel is relatively small, and air inlet is relatively large in diameter.This
Sample makes the air inflow of the bleed hole VI at various locations of baffle rings 208 more uniform, and the uniformity of bleed distribution obtains larger change
It is kind.
For another part air-flow, since the bleed distributing uniformity of the air-flow mentioned by baffle rings 208 obtains
Very big improvement, so that the tolerance that should enter tissue combustion zone by the air-flow of burner inner liner 206 is distributed and is also improved.
Gas oil ratio is uniform in burner inner liner, and rationally, fuel burning is more abundant for the burning of burner inner liner inner tissue, and then improves auxiliary power dress
It sets the efficiency of combustion of burner inner liner and improves Exit temperature distribution.The raising of efficiency of combustion can be improved auxiliary power unit shaft work
Delivery efficiency, the improvement of Exit temperature distribution can further increase the turbine blade life of output shaft work.Therefore the disclosure is most
It can reach while improve practical efficiency and the service life of auxiliary power unit eventually.
Present disclose provides a kind of bleed structure of new auxiliary power unit, fixed using perforated baffle ring and casing
Structure design, can effectively reduce baffle rings as bleed initial vibration and it is uneven caused by exciting act on, improve auxiliary
The service life of power-assisting device；In addition, by pore size, distribution and the quantity in design bleed hole to improve auxiliary power dress
The bleed distribution set, to keep the burning of burner inner liner inner tissue more reasonable, improve efficiency of combustion and obtain preferable outlet temperature
Distribution, and then improve the service life of auxiliary power unit shaft work delivery efficiency and turbo blade.
Those skilled in the art should be noted that embodiment described in the disclosure is only exemplary, can be
Various other replacements, changes and improvements are made in the scope of the present disclosure.Thus, the present disclosure is not limited to above embodiment, and only
It is defined by the claims.
Claims (9)
1. a kind of bleed structure of auxiliary power unit characterized by comprising
Casing, including outer casing and interior casing form first chamber, the first chamber tool between the outer casing and interior casing
There are inlet end and gas supply end；
Diffuser is located at the inlet end side, and it is logical that circumferentially continuous air inlet is formed between the diffuser and the outer casing
Road；
Sustainer air supply channel is located at the gas supply end side；
Burner inner liner is located in the first chamber, and the burner inner liner includes flame drum outer wall and burner inner liner inner wall, the burner inner liner
Outer wall and the inner wall of the burner inner liner offer multiple burner inner liner air inlets, the flame drum outer wall and burner inner liner inner wall structure
At second chamber；
Baffle rings, in the first chamber between the burner inner liner and the sustainer air supply channel, the baffle rings
One end is connect with the inner wall of the outer casing, and the other end is connect with the inner wall of the interior casing, and is offered in the baffle rings
Bleed hole.
2. bleed structure according to claim 1, which is characterized in that offer circumferentially discrete distribution in the baffle rings
Multiple bleed holes, and close to the sustainer air supply channel bleed hole aperture be less than far from the sustainer supply
The aperture in the bleed hole in channel.
3. bleed structure according to claim 2, which is characterized in that multiple bleed holes are in the baffle rings along week
To being uniformly distributed.
4. bleed structure according to claim 2, which is characterized in that the bore dia range in the bleed hole be 5mm~
35mm。
5. bleed structure according to claim 2, which is characterized in that multiple bleed holes of the circumferentially discrete distribution
Quantity is 15~45.
6. bleed structure according to claim 2, which is characterized in that be also provided in the baffle rings radially distributed
Multilayer bleed aperture layer, every layer of bleed aperture layer include multiple bleed holes of the circumferentially discrete distribution.
7. bleed structure according to claim 6, which is characterized in that the multilayer bleed hole of the radially discrete distribution
Interlamellar spacing is identical.
8. bleed structure according to claim 6, which is characterized in that the number of the bleed aperture layer of the radially discrete distribution
Amount is 1~6 layer.
9. bleed structure according to claim 1, which is characterized in that the baffle rings with a thickness of 0.5mm~3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217909.5A CN109974032B (en) | 2019-03-21 | 2019-03-21 | Air entraining structure of auxiliary power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217909.5A CN109974032B (en) | 2019-03-21 | 2019-03-21 | Air entraining structure of auxiliary power device |
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| Publication Number | Publication Date |
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| CN109974032A true CN109974032A (en) | 2019-07-05 |
| CN109974032B CN109974032B (en) | 2021-03-05 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235803A (en) * | 1992-03-27 | 1993-08-17 | Sundstrand Corporation | Auxiliary power unit for use in an aircraft |
| EP1330618A2 (en) * | 2000-10-31 | 2003-07-30 | Pratt & Whitney Canada Corp. | Butterfly valve noise suppressor |
| US20120023896A1 (en) * | 2010-07-30 | 2012-02-02 | Hamilton Sundstrand Corporation | Auxiliary power unit fire enclosure drain |
| CN202645736U (en) * | 2011-12-29 | 2013-01-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | APU core machine |
| CN205805730U (en) * | 2016-06-21 | 2016-12-14 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of gas turbine bleed baffle plate |
| CN106640739B (en) * | 2016-12-24 | 2018-11-06 | 中国科学院工程热物理研究所 | A kind of adjustable centrifugal compressor circumferential weld bleed structure |
-
2019
- 2019-03-21 CN CN201910217909.5A patent/CN109974032B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235803A (en) * | 1992-03-27 | 1993-08-17 | Sundstrand Corporation | Auxiliary power unit for use in an aircraft |
| EP1330618A2 (en) * | 2000-10-31 | 2003-07-30 | Pratt & Whitney Canada Corp. | Butterfly valve noise suppressor |
| US20120023896A1 (en) * | 2010-07-30 | 2012-02-02 | Hamilton Sundstrand Corporation | Auxiliary power unit fire enclosure drain |
| CN202645736U (en) * | 2011-12-29 | 2013-01-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | APU core machine |
| CN205805730U (en) * | 2016-06-21 | 2016-12-14 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of gas turbine bleed baffle plate |
| CN106640739B (en) * | 2016-12-24 | 2018-11-06 | 中国科学院工程热物理研究所 | A kind of adjustable centrifugal compressor circumferential weld bleed structure |
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| Publication number | Publication date |
|---|---|
| CN109974032B (en) | 2021-03-05 |
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