CN108443227A - A kind of casing ripple struction for preventing centrifugal impeller from scratching - Google Patents
A kind of casing ripple struction for preventing centrifugal impeller from scratching Download PDFInfo
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- CN108443227A CN108443227A CN201810509619.3A CN201810509619A CN108443227A CN 108443227 A CN108443227 A CN 108443227A CN 201810509619 A CN201810509619 A CN 201810509619A CN 108443227 A CN108443227 A CN 108443227A
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- casing
- centrifugation
- epimere
- hypomere
- centrifugation casing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses a kind of centrifugation casing ripple structions for preventing centrifugal impeller from scratching, by increasing by a ripple struction in the middle part of centrifugation casing, influence of the centrifugation casing epimere thermal deformation to centrifugation casing hypomere can effectively be controlled, it both can be with the blade tip clearance of reasonable Arrangement centrifugal impeller, aeroperformance and operational safety can be taken into account simultaneously, when the temperature is changed, increase buffer structure for centrifugation casing deformation, so as to effectively control since temperature change causes the variation for centrifuging casing.
Description
Technical field
The invention belongs to centrifugal compressor fields, are related to a kind of centrifugal compressor case structure, and in particular to a kind of application
The case structure of high load capacity centrifugal compressor in Small Aeroengine high-pressure compressor.
Background technology
In the present age advanced Small Aeroengine, high-pressure compressor mostly uses multistage axial flow+one-stage centrifugal and calms the anger
Machine structure, two stage centrifugal air compressor structure and single-stage oblique flow+one-stage centrifugal air compressor structure, it is not difficult to see from it that, centrifugation pressure
Mechanism of qi is simple in structure and be widely used due to its single-stage pressure ratio height.
By taking certain small-sized fanjet as an example, as shown in Figure 1, 2, air-flow first passes through fan, is shunted by fan splitter 5
Afterwards, intension air-flow 2 enters high-pressure compressor, and high-pressure compressor earlier stages are that the multistage axial flow being arranged in rotor axis 1 is calmed the anger
Machine (including the components such as axial wheel 3, axial wheel casing 6, axis stream stator 7), later stages are in most cases centrifugal pressure
Mechanism of qi (including the components such as centrifugal impeller 8, centrifugation casing 14), the exit of centrifugal-flow compressor is fixed by trip bolt 13 to be connected
Diffuser 12 is connect, the air-flow after being overpressurized enters combustion chamber 11, mixes and burns with fuel oil, generates high temperature and high pressure gas,
High-pressure turbine 10 is pushed to do work.In this process, outer 14 heated airflow of casing of centrifugal impeller is washed away, and temperature change will produce
Thermal deformation.Simultaneously as centrifugation casing epimere is connected by screw 13 with diffuser 12, diffuser 12 is by airflow scouring and combustion
Room radiation is burnt, Part temperature increases, will produce thermal deformation, since the front fulcrum that engine is located at fan splitter 5 is fixed, cause
Diffuser moves backward 28, and centrifugation casing 14 is driven to be deformed, finally so that between centrifugal impeller 8 and the outer casing hypomere of centrifugation
Gap 15 becomes smaller, and scratches to be easy to cause centrifugal impeller blade tip, increases engine luggine, when serious, cause damage parts, send out
It makes trouble former.
The generation of above-mentioned failure can effectively be inhibited by increasing centrifugal impeller blade tip clearance.But due to centrifugal impellers blades height
Size is small, and the blade tip clearance relative value high with respect to centrifugal impeller leaf is bigger than normal, and therefore, excessively improving centrifugal impeller blade tip clearance can make
Drastically decline at centrifugal impeller performance.Therefore, in order to ensure that the aeroperformance of centrifugal impeller, centrifugal impeller blade tip clearance value are usual
It is smaller.By being analyzed above it is known that centrifugal compressor aeroperformance and safety of structure in order to balance, control aero-engine
Effective blade tip clearance under working condition is most important.
Invention content
For in existing advanced Small Aeroengine, high-pressure compressor afterbody is the knot of centrifugal-flow compressor
Structure, due to temperature change, the outer casing of centrifugal impeller occurs thermal deformation and easily scratches with centrifugal impeller, and in order to ensure to centrifuge leaf
Aeroperformance is taken turns, blade tip clearance cannot be arranged excessive, and for this design contradiction, the present invention, which proposes one kind, preventing centrifugal impeller
The casing ripple struction of scratch.
The present invention is that technical solution used by solving its technical problem is：
It is a kind of prevent centrifugal impeller scratch centrifugation casing ripple struction, the centrifugation casing include centrifugation casing epimere with
Casing hypomere is centrifuged, the centrifugation casing epimere is arranged in the downstream of the centrifugation casing hypomere, and the centrifugation casing epimere is logical
It crosses connector to be mechanically connected with radial diffuser component, centrifugal impeller, the centrifugation casing is set in the centrifugation casing hypomere
There is gap between hypomere and centrifugal impeller leaf top, which is characterized in that
An annular ripple structure, the annular ripple structure are set between the centrifugation casing epimere and centrifugation casing hypomere
To realize the connection between the centrifugation casing epimere and centrifugation casing hypomere and completely cut off the thermal change for centrifuging casing epimere
Influence of the shape to the centrifugation casing hypomere, wherein
The relatively described centrifugation casing hypomere of the centrifugation casing epimere has an outside axile displacement distance,
The annular ripple structure include an inner edge flat segments, an outer rim tilting section and one be located at the inner edge flat segments and
Arc transition section between outer rim tilting section, wherein
Connect at the top of the inner edge flat segments and the centrifugation casing hypomere, radius is centrifugal impeller outlet half
1~1.01 times of diameter, width are 0.1-0.25 times of the centrifugation casing hypomere width,
The bottom connection of the outer rim tilting section and the centrifugation casing epimere, the bottom radius of the centrifugation casing epimere
It it is 1.1~1.2 times of the inner edge flat segments radius, between the outer rim tilting section and the centrifugation casing epimere not with one
Inclination angle more than 90 °,
The both ends of the arc transition section are tangent with the inner edge flat segments and outer rim tilting section respectively.
Preferably, the centrifugation casing epimere and axile displacement distance between casing hypomere is centrifuged generally in 3mm or so,
To arrange the casing of the radial diffuser.
Preferably, ranging from 0~70 degree of inclination angle between the outer rim tilting section and centrifugation casing epimere.
Preferably, the inclination angle between the outer rim tilting section and centrifugation casing epimere is 0 degree.
Compared with the existing technology, the centrifugation casing ripple struction for preventing centrifugal impeller scratch of the invention, can effectively control
Influence of the system centrifugation casing epimere thermal deformation to centrifugation casing hypomere, both can be with the blade tip clearance of reasonable Arrangement centrifugal impeller, together
When can take into account aeroperformance and operational safety.It is influenced in-between to reduce due to centrifuging casing caused by temperature change,
Increase by a ripple struction in the middle part of centrifugation casing, can effectively completely cut off centrifugation casing epimere and centrifuge the interaction of casing hypomere,
When the temperature is changed, increase buffer structure for centrifugation casing deformation, so as to effectively control since temperature change causes centrifuge
The variation of casket.
Description of the drawings
Fig. 1 is the structural schematic diagram of combined compressor in certain small-sized fanjet；
Fig. 2 is that centrifugation casing typically deforms schematic diagram；
Fig. 3 is the centrifugation case structure schematic diagram for increasing bellows segment；
Fig. 4 is that casing medium wave line structural schematic diagram is centrifuged in Fig. 3；
The centrifugation case structure schematic diagram of the specific value lower band ripple structions of Fig. 5.
Label declaration：Rotor axis 1, intension runner 2, axial wheel 3, casing 4 in outer culvert, fan splitter 5, axial wheel
Casing 6, axis stream stator 7, centrifugal impeller 8, center pull rod 9, high-pressure turbine 10, combustion chamber 11, diffuser 12, trip bolt 13,
Centrifuge casing 14, centrifugal impeller outlet gap 15, centrifugation casing epimere 16, centrifugation casing hypomere 17, ripple struction 18, angle
19, chamfering radius 20, centrifugation casing upper-lower section axial deviation 21, bellows segment axial direction straight length 22, bellows segment inner ring radius 23,
Bellows segment outer shroud radius 24, bellows segment outer shroud centrifuge casing axis with centrifugation casing epimere intersection point 25, centrifugal impeller exit radius 26
To length 27, casing upper end moving direction 8
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this hair
Bright further description.
As seen in figures 3-5, the centrifugation casing ripple struction for preventing centrifugal impeller scratch of the invention, centrifugation casing 14 wrap
Centrifugation casing epimere 16 and centrifugation casing hypomere 17 are included, the centrifugation casing epimere 16 is arranged in the centrifugation casing hypomere 17
Downstream, it is to centrifuge the axile displacement of casing upper and lower side to have an axile displacement distance 21, this size therebetween, and main purpose is
For the casing of reasonable Arrangement radial diffuser, this size in 3mm or so, can be generally adjusted according to practical structures size；
The centrifugation casing epimere 16 is mechanically connected by connector and radial diffuser component, setting in the centrifugation casing hypomere 17
Centrifugal impeller 8 has blade tip clearance 15 between the centrifugation casing hypomere 17 and the leaf top of centrifugal impeller 8.The centrifugation casing
One annular ripple structure 18 is set between epimere 16 and centrifugation casing hypomere 17, and the annular ripple structure 18 is described to realize
It centrifuges the connection between casing epimere 16 and centrifugation casing hypomere 17 and completely cuts off the thermal deformation of the centrifugation casing epimere 16 to institute
State the influence of centrifugation casing hypomere 17.
Annular ripple structure 18 includes that an inner edge flat segments, an outer rim tilting section and one are located at inner edge flat segments and outer
Connect at the top of arc transition section between edge tilting section, the inner edge flat segments and the centrifugation casing hypomere, the outer rim
The bottom connection of tilting section and the centrifugation casing epimere, the both ends of the arc transition section respectively with the inner edge flat segments and
Outer rim tilting section is tangent.Annular ripple structure 18 is arranged as follows：The radius 23 of inner edge flat segments is chosen first, generally
At select centrifugal impeller exit radius 26 1~1.01 times；After the radius 23 of selected inner edge flat segments, reselection inner edge flat segments
Width 22, be typically chosen in 0.1-0.25 times of the width 27 of centrifugation casing hypomere 17, this size can be according to the reality of structure
Space accordingly adjusts；The bottom radius 24 of the centrifugation casing epimere, this size determine the outer diameter of ripple struction, generally
It is 1.1~1.2 times of inner edge flat segments radius 23；There is inclination angle 19 between the outer rim tilting section and the centrifugation casing epimere
(intersection point between the two is 25), optional 70~0 degree of angle value；The chamfering radius 20 for selecting arc transition section, completes entire wave
Line structural modeling.When angle 19 selects 0 degree, entire ripple struction just can be changed to the structure of Fig. 5, have best make-up piece
The function of radial deformation.
The present invention's prevents the centrifugation casing ripple struction that centrifugal impeller scratches, and can effectively control centrifugation casing epimere heat
The influence to centrifuging casing hypomere is deformed, both can be with the blade tip clearance of reasonable Arrangement centrifugal impeller, while pneumatic property can be taken into account
Energy and operational safety.It influences due to centrifuging casing caused by temperature change to reduce, increases in the middle part of centrifugation casing in-between
Add a ripple struction, can effectively completely cut off centrifugation casing epimere and centrifuge casing hypomere interaction, when the temperature is changed, for from
The deformation of scheming casket increases buffer structure, so as to effectively control since temperature change causes the variation for centrifuging casing.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright.It should be understood that the above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (4)
1. it is a kind of prevent centrifugal impeller scratch centrifugation casing ripple struction, the centrifugation casing include centrifuge casing epimere and from
Scheming casket hypomere, the centrifugation casing epimere are arranged in the downstream of the centrifugation casing hypomere, and the centrifugation casing epimere passes through
Connector is mechanically connected with radial diffuser component, setting centrifugal impeller in the centrifugation casing hypomere, under the centrifugation casing
There is gap between section and centrifugal impeller leaf top, which is characterized in that
An annular ripple structure is set between the centrifugation casing epimere and centrifugation casing hypomere, the annular ripple structure to
It realizes the centrifugation casing epimere and centrifuges the connection between casing hypomere and completely cut off the thermal deformation pair of the centrifugation casing epimere
The influence of the centrifugation casing hypomere, wherein
The relatively described centrifugation casing hypomere of the centrifugation casing epimere has an outside axile displacement distance,
The annular ripple structure includes an inner edge flat segments, an outer rim tilting section and one positioned at the inner edge flat segments and outer rim
Arc transition section between tilting section, wherein
Connect at the top of the inner edge flat segments and the centrifugation casing hypomere, radius is the centrifugal impeller exit radius
1~1.01 times, width is 0.1-0.25 times of the centrifugation casing hypomere width,
The bottom radius of the bottom connection of the outer rim tilting section and the centrifugation casing epimere, the centrifugation casing epimere is institute
State inner edge flat segments radius 1.1~1.2 times have one to be not more than between the outer rim tilting section and the centrifugation casing epimere
90 ° of inclination angle,
The both ends of the arc transition section are tangent with the inner edge flat segments and outer rim tilting section respectively.
2. the centrifugation casing ripple struction according to the claims, which is characterized in that the centrifugation casing epimere with from
Axile displacement distance between scheming casket hypomere is generally in 3mm or so, to arrange the casing of the radial diffuser.
3. the centrifugation casing ripple struction according to the claims, which is characterized in that the outer rim tilting section and centrifugation
Ranging from 0~70 degree of inclination angle between casing epimere.
4. the centrifugation casing ripple struction according to the claims, which is characterized in that the outer rim tilting section and centrifugation
Inclination angle between casing epimere is 0 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810509619.3A CN108443227B (en) | 2018-05-24 | 2018-05-24 | Casing corrugated structure for preventing centrifugal impeller from being scratched |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810509619.3A CN108443227B (en) | 2018-05-24 | 2018-05-24 | Casing corrugated structure for preventing centrifugal impeller from being scratched |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108443227A true CN108443227A (en) | 2018-08-24 |
| CN108443227B CN108443227B (en) | 2020-05-05 |
Family
ID=63205529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810509619.3A Active CN108443227B (en) | 2018-05-24 | 2018-05-24 | Casing corrugated structure for preventing centrifugal impeller from being scratched |
Country Status (1)
| Country | Link |
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| CN (1) | CN108443227B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404341A (en) * | 2018-10-16 | 2019-03-01 | 中国航发南方工业有限公司 | A kind of engine centrifugal impeller clearance regulating mechanism and matching method |
| CN113074126A (en) * | 2021-04-18 | 2021-07-06 | 上海尚实能源科技有限公司 | Two-stage axial flow compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001342995A (en) * | 2000-05-29 | 2001-12-14 | Honda Motor Co Ltd | Centrifugal compressor and centrifugal turbine |
| US20080069690A1 (en) * | 2006-09-18 | 2008-03-20 | Pratt & Whitney Canada Corp. | Thermal and external load isolating impeller shroud |
| CN202040120U (en) * | 2010-12-15 | 2011-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | Thermal expansion compensation housing device |
| CN102384106A (en) * | 2007-06-18 | 2012-03-21 | 株式会社Ihi | Centrifugal compressor casing |
| CN207363956U (en) * | 2017-09-05 | 2018-05-15 | 江苏正驰机电有限公司 | Automobile turbocharger compressor casing |
-
2018
- 2018-05-24 CN CN201810509619.3A patent/CN108443227B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001342995A (en) * | 2000-05-29 | 2001-12-14 | Honda Motor Co Ltd | Centrifugal compressor and centrifugal turbine |
| US20080069690A1 (en) * | 2006-09-18 | 2008-03-20 | Pratt & Whitney Canada Corp. | Thermal and external load isolating impeller shroud |
| CN102384106A (en) * | 2007-06-18 | 2012-03-21 | 株式会社Ihi | Centrifugal compressor casing |
| CN202040120U (en) * | 2010-12-15 | 2011-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | Thermal expansion compensation housing device |
| CN207363956U (en) * | 2017-09-05 | 2018-05-15 | 江苏正驰机电有限公司 | Automobile turbocharger compressor casing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404341A (en) * | 2018-10-16 | 2019-03-01 | 中国航发南方工业有限公司 | A kind of engine centrifugal impeller clearance regulating mechanism and matching method |
| CN109404341B (en) * | 2018-10-16 | 2020-10-30 | 中国航发南方工业有限公司 | Engine centrifugal impeller gap adjusting mechanism and matching method |
| CN113074126A (en) * | 2021-04-18 | 2021-07-06 | 上海尚实能源科技有限公司 | Two-stage axial flow compressor |
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| Publication number | Publication date |
|---|---|
| CN108443227B (en) | 2020-05-05 |
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