CN1995762A - Controllable profile vaneless diffuser for centrifugal compressor - Google Patents
Controllable profile vaneless diffuser for centrifugal compressor Download PDFInfo
- Publication number
- CN1995762A CN1995762A CN 200610169820 CN200610169820A CN1995762A CN 1995762 A CN1995762 A CN 1995762A CN 200610169820 CN200610169820 CN 200610169820 CN 200610169820 A CN200610169820 A CN 200610169820A CN 1995762 A CN1995762 A CN 1995762A
- Authority
- CN
- China
- Prior art keywords
- diffuser
- arc ring
- circular arc
- wall
- controllable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a vaneless diffuser with controlled profile in centrifugal compressor, belonging to turbo-machine technology area, comprising rotating shaft of compressor, impeller disc, vane, diffuser shroud of external wall, diffuser disc and impeller baffle, characterized in that a flexible annular disc is set in the inner wall of diffuser shroud of external wall, the internal circle of said flexible annular disc is fixed with the inner side of said diffuser shroud of external wall, at least two groups of arc ring plates distributed on the radius direction are fixed in the circle face of said flexible annular disc, each group of arc ring plates comprises at least three arc ring plates distributed on the circle direction and each arc ring plated is connected with a controlled thrust mechanism. The invention can avoid flow separation inside the diffuser, improve the diffuser efficiency, expand the condition range of compressor and improve stall margin under different flux conditions, shrinkage or expansion flow channel and approached optimal profile.
Description
Technical field:
Controllable profile vaneless diffuser for centrifugal compressor belongs to impeller machinery technical field.
Technical background:
The present invention relates to the improvement of turbomachine vaneless diffusers such as automobile-used, peculiar to vessel pressurized machine centrifugal compressor, industrial centrifugal compressor and aviation centrifugal compressor.
Impeller type gas compressors such as centrifugal-flow compressor have advantages such as efficient height, volume weight is light, running is steady, but its operating mode are limited in scope with respect to reciprocating compressor.Under the centrifugal-flow compressor low discharge operating mode will phenomenons such as large scale flow separation appear at impeller and Diffuser, the unstable operation phenomenon occurs, cause stall even surge, directly cause compressor efficiency and pressure ratio sharply to descend, the life-span seriously shortens, even directly damages in the short time.
The fixedly shape of wheel disc and wheel cap is adopted in existing centrifugal compressor vaneless diffuser passage both sides, its shape is determined according to the design point operating mode, obtain optimal performance at design point, can be effectively the kinetic energy of impeller outlet gas be converted into static energy, and cause the large scale separation of greater loss.But this fixed wall is suitable for the vaneless diffuser of design discharge under the low discharge operating mode, has large scale flow separation phenomenon to take place in the Diffuser, and this stall phenomenon causes flow losses to increase, and diffuser efficiency descends; When flow further reduced, the gas Radial Flow was short of power, under the adverse pressure gradient effect of gas compressor, and gas backstreaming, gas compressor generation surging phenomenon.When the centrifugal compressor flow reduced, the Diffuser sectional area was also answered corresponding reducing, and separated to reduce, and improved diffuser efficiency, enlarged gas compressor stable operation operating mode scope.The existing patent of translation wheel cap Diffuser flow area when reducing low discharge of having used (is seen notification number CN1021591A,), but wheel cap internal face shape is fixed, wall only can move do translation, and but translation Diffuser inwall has blocking action to the big distance of wheel disc translation back to the impeller outlet air-flow at the impeller outlet place, can cause bigger impact loss, cause diffuser efficiency to descend.Under each flow situation, the Diffuser internal face has its optimum design shape, if can form optimum shape by the Diffuser internal face under each flow condition, maximum efficiency is suppressed the Diffuser flow separation, effectively expands gas compressor steady working condition scope.By retrieval, do not relate in the domestic and international disclosed document can be under each flow condition the Diffuser internal face form the document of the Diffuser of optimum shape.
Summary of the invention:
The object of the invention is, has overcome the defective of prior art, can not design controllable profile vaneless diffuser for centrifugal compressor according to the defective of Flow-rate adjustment Diffuser internal face shape at existing centrifugal compressor vaneless diffuser.
The invention is characterized in, contain gas compressor rotating shaft (1), hub disk (2), blade (3), outer wall Diffuser wheel cap (5), Diffuser wheel disc (10) and impeller baffle plate (12), it is characterized in that, on the madial wall of described outer wall Diffuser wheel cap (5), a flexible endless disk (9) also is housed, the madial wall of the inner circumference of described flexible endless disk (9) and described outer wall Diffuser wheel cap (5) is fixed, on the circumferential surface of described flexible endless disk (9), be fixed with the radially-arranged circular arc ring plate of at least two groups group, each group circular arc ring plate group contains at least 3 the circular arc ring plates (8) that distribute along circumferentially, and each circular arc ring plate (8) connects a controllable type thrust mechanism (16).
Described controllable type thrust mechanism (16) contains the support shell (6) on the madial wall that is fixed on outer wall Diffuser wheel cap (5), be with an end and the fixing tappet (7) of described circular arc ring plate (8) of a hollow in described support shell (6), tappet (7) can be free to slide in support shell (6) vertically; In described support shell (6), also be fixed with an electric heating post (15) vertically, on described electric heating post (15), be with memory alloy spring (14).
The material of described flexible endless disk (9) is an alloy spring steel.
Described each group circular arc ring plate group contains along circumferential uniform 6 circular arc ring plates (8).
There is one to form the capsul (13) of sealing configuration on described flexible endless disk (9) excircle with described outer wall Diffuser wheel cap (5).
Evidence, controllable profile vaneless diffuser for centrifugal compressor proposed by the invention can reach its intended purposes according to the shape of Flow-rate adjustment Diffuser internal face.
Description of drawings:
Fig. 1 is a sectional view of the present invention.
Fig. 2 is the sectional view of controllable-thrust mechanism.
Fig. 3 is the distribution schematic diagram of the circular arc ring plate on the flexible endless disk.
Embodiment:
Accompanying drawings the specific embodiment of the present invention.
As shown in Figure 1, gas compressor rotating shaft 1, hub disk 2, blade 3, outer wall Diffuser wheel cap 5, Diffuser wheel disc 10 and impeller baffle plate 12 are existing gas compressor universal component, the 11st, vaneless diffuser runner.Be characterized in, on the madial wall of outer wall Diffuser wheel cap 5, a flexible endless disk 9 also is housed, the inner circumference of flexible endless disk 9 links to each other with the madial wall of outer wall Diffuser wheel cap 5 and forms connecting part 4, on the circumferential surface of flexible endless disk 9, be fixed with the radially-arranged circular arc ring plate of at least two groups group, each group circular arc ring plate group contains at least 3 circular arc ring plates 8 that distribute along circumferentially, and each circular arc ring plate 8 connects a controllable-thrust mechanism 16.This thrust mechanism 16 can be the push rod that drives by the memory alloy of heater control or by micromachine etc., the system of equipping this gas compressor obtains the information of flow transducer, via providing concrete displacement amount after the ECU (Electrical Control Unit) processing, make controllable-thrust mechanism 16 promote circular arc ring plate 8 according to displacement amount, make flexible endless disk 9 produce deformation, thereby form the internal face shape of the optimization under the different flow.Circular arc ring plate 8 has guaranteed the active force stepless action in circumferential direction, has guaranteed 9 distortion of flexible endless disk circumferentially evenly.
Describe below in conjunction with specific embodiment.
See Fig. 1, a flexible endless disk 9 is housed on Diffuser wheel cap 5 madial walls, flexible endless disk 9 can be made by alloy spring steel, and the inner circumferential portion of flexible endless disk 9 links to each other with outer wall Diffuser wheel cap 5 and forms connecting part 4.Circular arc ring plate group has two groups, and every group of 6 circular arc ring plates are circumferentially uniform, are fixed on the flexible endless disk 9.The corresponding controllable-thrust mechanism 16 of each circular arc ring plate, it is the thrust mechanism in thrust source that present embodiment adopts the memory alloy of heater control.
As shown in Figure 2, controllable-thrust mechanism 16 is made up of support shell 6, memory alloy spring 14, electric heating post 15 and tappet 7.Support shell 6 is fixed on the madial wall of Diffuser wheel cap 5, is cavity structure, and tappet 7 is column structures of hollow, the one end is fixed on the circular arc ring plate 8, the other end is enclosed within the support shell 6, can produce slide relative with support shell, and electric heating post 15 is fixed in the support shell 6 vertically, can produce heat after the energising, temperature raises, and cover memory alloy spring 14 is thereon prolonged, and promotes circular arc ring plate 8, make flexible endless disk 9 produce deformation, the deformation quantity of generation is by the decision of electrical current size.
There is a circle capsul 13 at the edge of flexible endless disk 9 excircles, and shape is similar to cylindrical side, mainly works to prevent that air-flow from flowing between outer wall Diffuser 5 and the flexible endless disk 9, to avoid bigger return loss.
The quantity of controllable type thrust mechanism is identical with the circular arc ring plate and be that the position is corresponding, its group number with determine by the Diffuser radial length.For large-scale gas compressor, its Diffuser radial length is big, can settle 3 groups or 3 groups of above thrust mechanisms, can better control the profile of Diffuser; For middle-size and small-size gas compressor, Diffuser length is shorter, also should keep 2 groups of displacement thrust mechanisms.The number of each group is relevant with the circumference of flexible endless disk, can be according to the big or small suitable increase of girth or the number of minimizing thrust mechanism.
Under each flow situation, the Diffuser internal face all has optimum profile shape, controllable-thrust mechanism 16 obtains the displacement of ECU (Electrical Control Unit) according to the flow rate calculation gained, promote flexible endless disk 9 and carry out corresponding axial displacement, as shown in Figure 3, flexible endless disk 9 has three profile shape control points in radial direction, is respectively binding site 4 and two groups of circular arc ring plates 8, to reach the effect of approaching optimum profile as far as possible.Under the rated flow operating mode, the tappet retraction guarantees that the Diffuser circulation area is enough big, avoids occurring blocking phenomenon; Under low flow rate condition, tappet stretches out, and the diffuser walls profile presents the runner of contraction, and profile approaches optimum profile shape, avoids the Diffuser internal flow to separate, and has improved diffuser efficiency, has expanded gas compressor operating mode scope, has improved stall margin.
Claims (5)
1, controllable profile vaneless diffuser for centrifugal compressor, contain gas compressor rotating shaft (1), hub disk (2), blade (3), outer wall Diffuser wheel cap (5), Diffuser wheel disc (10) and impeller baffle plate (12), it is characterized in that, on the madial wall of described outer wall Diffuser wheel cap (5), a flexible endless disk (9) also is housed, the madial wall of the inner circumference of described flexible endless disk (9) and described outer wall Diffuser wheel cap (5) is fixed, on the circumferential surface of described flexible endless disk (9), be fixed with the radially-arranged circular arc ring plate of at least two groups group, each group circular arc ring plate group contains at least 3 the circular arc ring plates (8) that distribute along circumferentially, and each circular arc ring plate (8) connects a controllable type thrust mechanism (16).
2, controllable profile vaneless diffuser for centrifugal compressor as claimed in claim 1, it is characterized in that, described controllable type thrust mechanism (16) contains the support shell (6) on the madial wall that is fixed on outer wall Diffuser wheel cap (5), be with an end and the fixing tappet (7) of described circular arc ring plate (8) of a hollow in described support shell (6), tappet (7) can be free to slide in support shell (6) vertically; In described support shell (6), also be fixed with an electric heating post (15) vertically, on described electric heating post (15), be with memory alloy spring (14).
3, heart gas compressor controllable profile vaneless diffuser as claimed in claim 1 is characterized in that, the material of described flexible endless disk (9) is an alloy spring steel.
4, heart gas compressor controllable profile vaneless diffuser as claimed in claim 1 is characterized in that, described each group circular arc ring plate group contains along circumferential uniform 6 circular arc ring plates (8).
5, controllable profile vaneless diffuser for centrifugal compressor as claimed in claim 1 is characterized in that, has one to form the capsul (13) of sealing configuration with described outer wall Diffuser wheel cap (5) on described flexible endless disk (9) excircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101698209A CN100427768C (en) | 2006-12-29 | 2006-12-29 | Controllable profile vaneless diffuser for centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101698209A CN100427768C (en) | 2006-12-29 | 2006-12-29 | Controllable profile vaneless diffuser for centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995762A true CN1995762A (en) | 2007-07-11 |
| CN100427768C CN100427768C (en) | 2008-10-22 |
Family
ID=38250931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101698209A Expired - Fee Related CN100427768C (en) | 2006-12-29 | 2006-12-29 | Controllable profile vaneless diffuser for centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100427768C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148021A (en) * | 2013-03-22 | 2013-06-12 | 清华大学 | Centrifugal compressor with inlet guide blades and turbocharger |
| CN103244462A (en) * | 2012-02-14 | 2013-08-14 | 珠海格力电器股份有限公司 | Serial-type blade diffuser and production method thereof |
| CN106460855A (en) * | 2014-12-05 | 2017-02-22 | 大陆汽车有限公司 | Compressor having a variable diffuser width |
| CN112112838A (en) * | 2019-06-19 | 2020-12-22 | 开利公司 | Diffuser system and centrifugal compressor comprising same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182710B (en) * | 2011-03-23 | 2013-07-17 | 清华大学 | Centrifugal compressor with asymmetrical vane-less diffusers and producing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3478955A (en) * | 1968-03-11 | 1969-11-18 | Dresser Ind | Variable area diffuser for compressor |
| US4616483A (en) * | 1985-04-29 | 1986-10-14 | Carrier Corporation | Diffuser wall control |
| US4611969A (en) * | 1985-08-19 | 1986-09-16 | Carrier Corporation | Calibrating apparatus and method for a movable diffuser wall in a centrifugal compressor |
| JPH11257293A (en) * | 1998-03-11 | 1999-09-21 | Kobe Steel Ltd | Control device of centrifugal compressor |
| JP2000205186A (en) * | 1999-01-18 | 2000-07-25 | Ishikawajima Harima Heavy Ind Co Ltd | Centrifugal compressor |
| JP4573074B2 (en) * | 2000-05-24 | 2010-11-04 | 株式会社Ｉｈｉ | Centrifugal compressor with variable diffuser and its control method |
-
2006
- 2006-12-29 CN CNB2006101698209A patent/CN100427768C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244462A (en) * | 2012-02-14 | 2013-08-14 | 珠海格力电器股份有限公司 | Serial-type blade diffuser and production method thereof |
| CN103244462B (en) * | 2012-02-14 | 2015-08-19 | 珠海格力电器股份有限公司 | Tandem blade Diffuser and manufacture method thereof |
| CN103148021A (en) * | 2013-03-22 | 2013-06-12 | 清华大学 | Centrifugal compressor with inlet guide blades and turbocharger |
| CN103148021B (en) * | 2013-03-22 | 2016-06-08 | 清华大学 | There is centrifugal compressor and the turbocharger of entry guide vane |
| CN106460855A (en) * | 2014-12-05 | 2017-02-22 | 大陆汽车有限公司 | Compressor having a variable diffuser width |
| CN112112838A (en) * | 2019-06-19 | 2020-12-22 | 开利公司 | Diffuser system and centrifugal compressor comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100427768C (en) | 2008-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100427768C (en) | Controllable profile vaneless diffuser for centrifugal compressor | |
| CN102182710A (en) | Centrifugal compressor with asymmetrical vane-less diffusers and producing method thereof | |
| JP6628611B2 (en) | Flow guide for steam turbine exhaust system and exhaust system for steam turbine | |
| KR20130079326A (en) | Method for adapting the air flow of a turbine engine having a centrifugal compressor and diffuser for implementing same | |
| CN105179028B (en) | Support case and rectification leaf grating integral structure after turbine | |
| CN103277324A (en) | Centrifugal compressor with asymmetrical vaneless diffuser and automobile with same | |
| US11073124B2 (en) | Hydraulic turbine | |
| CN103216374A (en) | Low-specific speed small mixed flow water turbine | |
| US20140133961A1 (en) | Method and device for producing a driving force by bringing about differences in a closed gas/liquid system | |
| CN103244209A (en) | Diffuser end wall of turbine single-side exhaust system | |
| CN100408847C (en) | Method and device for reducing pressure fluctuations in an induction pipe of a water turbine or water pump or water-pump turbine | |
| CN104863643A (en) | Radial centrifugal turbine | |
| CN103912434A (en) | Small-hydropower axial flow turbine device | |
| RU2355910C2 (en) | Fluid medium turbine | |
| CN101825001A (en) | Axial flow turbine | |
| CN108691717B (en) | Mixed-flow water turbine with double rotating wheels | |
| CN102434215B (en) | Outer-rotor fluid power machine | |
| WO2016160393A1 (en) | Diffuser having multiple rows of diffuser vanes with different solidity | |
| CN111878451A (en) | Axial compressor sealing device, axial compressor and gas turbine | |
| CN104895617B (en) | Turbogenerator without flabellum | |
| CN203214227U (en) | Small mixed-flow water turbine for water-cooling tower system | |
| CN208749451U (en) | A kind of diffuser, compressor and combustion gas turbine | |
| CN109798215B (en) | Novel ultra-low specific speed water pump turbine | |
| CN103321955A (en) | Energy-saving fan | |
| CN210715175U (en) | Axial flow compressor of small and medium-sized gas turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20181229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |