CN106065877B - A kind of steady system of centrifugal compressor vaneless diffuser expansion - Google Patents
A kind of steady system of centrifugal compressor vaneless diffuser expansion Download PDFInfo
- Publication number
- CN106065877B CN106065877B CN201610624126.5A CN201610624126A CN106065877B CN 106065877 B CN106065877 B CN 106065877B CN 201610624126 A CN201610624126 A CN 201610624126A CN 106065877 B CN106065877 B CN 106065877B
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- China
- Prior art keywords
- return flow
- vaneless diffuser
- flow line
- vaneless
- diffuser
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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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
Abstract
The present invention relates to a kind of centrifugal compressor vaneless diffusers to expand steady system.This expands steady system and is provided with return flow line of the both ends with opening, radial linearly arrangement of the return flow line along vaneless diffuser on the inner sidewall of the vaneless diffuser.Return flow line is provided with several, several return flow lines are circumferentially arranged along vaneless diffuser；Dynamic pressure transducer is additionally provided in the present invention, distribution of the dynamic pressure transducer in the circumferential direction of vaneless diffuser is consistent with the arrangement of return flow line, dynamic pressure transducer position at the reflux import and bypass outlet two that the distributing position radially of vaneless diffuser includes at least return flow line.Headstock gear is provided in return flow line, controller the headstock gear in any return flow line can be achieved individually control.The present invention is by active Intelligentized regulating and controlling mode, so that it is steady to realize that the active of vaneless diffuser and intelligence are expanded in the case where not influencing the performance and efficiency under compressor design operating condition.
Description
Technical field
The invention belongs to Compressor Technology fields, and in particular to a kind of steady system of centrifugal compressor vaneless diffuser expansion.
Background technique
Centrifugal compressor is widely used in petrochemical industry, metallurgy, sky since its pressure ratio is high, flow is big, advantages of simple structure and simple
The fields such as tune, automobile.With the development of production, in recent years, stable operation and the steady technology of expansion to compressor propose higher
It is required that.One of the key factor for influencing compressor stable operation range is exactly rotating stall and surge under low discharge operating condition,
These flow instabilities phenomenons deteriorate compressor performance, further cause the vibration and destruction of the components such as impeller, cause to stop
Machine even major accident.Diffuser is the critical component that rotating stall occurs most frequently in addition to impeller.
For the diffuser buckling behaviors of centrifugal compressor, scholars have carried out the research of the steady technology of expansion, have mainly there is wall surface
Fluting, entrance gas injection etc..However, the steady technology of expansion in the prior art is often directed to blade diffuser, and without leaf diffusion
The rotating stall mechanism and blade diffuser of device have very big difference；In addition, for the improvement expanded in the structure surely made
It will affect internal flow under compressor script steady working condition, compressor performance and efficiency caused to decline.
Summary of the invention
In view of the above-mentioned deficiencies, the technical problem to be solved in the present invention is to provide a kind of expansions of centrifugal compressor vaneless diffuser
Steady system, this expands steady system in the case where not influencing the performance and efficiency under compressor design operating condition, can adaptively open up
Open up the stable working range of vaneless diffuser.
To achieve the goals above, the invention is realized by the following technical scheme:
A kind of centrifugal compressor vaneless diffuser expands steady system, is provided with both ends band on the inner sidewall of the vaneless diffuser
There are the return flow line of opening, radial linearly arrangement of the return flow line along vaneless diffuser.
Further, the reflux import of the return flow line is disposed proximate to the outlet side of vaneless diffuser, and reflux is logical
The bypass outlet in road is disposed proximate to the inlet side of vaneless diffuser.
Further, the return flow line is respectively arranged with several on two inner sidewalls of vaneless diffuser, several
Return flow line is circumferentially arranged along vaneless diffuser.
Preferably, the spacing between the bypass outlet and vaneless diffuser import is greater than the reflux import and expands with no leaf
Spacing between depressor outlet.
Further, it is provided in the return flow line for making return flow line circulate and close between two states
The headstock gear of switching；The headstock gear is electrically connected with controller.
Further, it is additionally provided in this system for monitoring the distribution of the pressure in vaneless diffuser and pressure fluctuation shape
The dynamic pressure transducer of condition, the output end of the dynamic pressure transducer are connected with the input terminal of data collector, the number
It is connected according to the output end of collector with the controller.
Preferably, the return flow line is provided with several, several return flow lines are circumferentially arranged along vaneless diffuser；
Distribution of the dynamic pressure transducer in the circumferential direction of vaneless diffuser is consistent with the arrangement of the return flow line, described dynamic
State pressure sensor includes at least the reflux import of the return flow line in the distributing position radially of vaneless diffuser and returns
Position at outflux two.
Preferably, the controller headstock gear in any return flow line can be achieved individually control.
The beneficial effects of the present invention are:
1) present invention is provided with return flow line on the inner sidewall of vaneless diffuser, under normal circumstances i.e. in vaneless diffuser
When stable, although also there is gas backstreaming in return flow line, return flow line both will not performance and effect to compressor at this time
Rate generates positive influence, also what adverse effect is not generated to the performance of compressor and efficiency；And when vaneless diffuser operation connects
Nearly rotating stall or when being in rotating stall state, is now in work of a part of gas in pressure difference of vaneless diffuser
Vaneless diffuser inlet is back to by return flow line with lower, to improve the flowing shape in vaneless diffuser significantly
State has effectively achieved and expands steady purpose.
2) present invention be also provided in the return flow line for make return flow line circulate and close two states it
Between the headstock gear that switches；The headstock gear is electrically connected with controller, that is, expand steady system can by controller realize to return
The active control of circulation road open/close states.The active control of return flow line makes the adaptability for expanding steady system and expands steady effect more
It is good.
3) present invention is also realized using dynamic pressure transducer to the pressure distribution and pressure fluctuation in vaneless diffuser
Monitoring, the dynamic pressure transducer is connected by data collector with controller, so that controller can judge in real time
A possibility that operating condition and rotating stall in vaneless diffuser occur.If stable in vaneless diffuser, close
Return flow line does not have an impact the performance of compressor and efficiency；If it is determined that vaneless diffuser operation close to rotating stall or
Rotating stall makes a part of gas be back to no leaf by return flow line and expands person then by controller opening return flow line
Depressor entrance improves the flow regime in vaneless diffuser, realizes and expands steady purpose.
4) several reflux radially arranged are provided on the inner sidewall that the present invention is oppositely arranged the two of vaneless diffuser
Channel, while the controller headstock gear in any return flow line can be achieved individually control.The difference of return flow line
Control can make the expansion of vaneless diffuser surely realize adjusting and asymmetric adjusting in real time, i.e. controller can pass through analysis dynamic
The monitoring result of pressure sensor adjusts return flow line number in the open state in real time to control return flow, optimizes
Expand steady effect and improves efficiency；And the asymmetric unlatching in return flow line may be implemented, such as the band asymmetrical outlet pressure of spiral case
Condition increases the unlatching number of certain position return flow lines, realizes the steady effect of the expansion of optimization.
5) the configuration of the present invention is simple and be easy to implement, by active Intelligentized regulating and controlling mode, to realize without leaf
The active of diffuser and intelligence expand steady；Change compared to traditional by the way that internal structure is fixed, can only passively expand steady mode, this
Invention is flexible and changeable in actual use, can not influence performance and efficiency when stable operation, while expanding loss when steady work
Also small；And it can intelligently adapt to real-time working condition condition and asymmetric outlet pressure condition.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the portion the B partial enlarged view of Fig. 2.
Fig. 4 is the reflux state schematic diagram of Fig. 3.
Fig. 5 is the top view of Fig. 1.
Fig. 6 is the bottom view of Fig. 1.
Fig. 7 is the flow field simulation figure of the vaneless diffuser of not set return flow line.
Fig. 8 is the flow field simulation figure for being provided with the vaneless diffuser of return flow line, the bypass outlet of this figure return flow line with
Spacing between vaneless diffuser import is 20mm.
Fig. 9 is the flow field simulation figure for being provided with the vaneless diffuser of return flow line, the bypass outlet of this figure return flow line with
Spacing between vaneless diffuser import is 30mm.
Meaning marked in the figure is as follows:
The return flow line 10- compressor 11- impeller 12- vaneless diffuser 121-
122- reflux import 123- bypass outlet 124- headstock gear 125- cover board
13- dynamic pressure transducer
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
As shown in figs. 2 to 4, a kind of centrifugal compressor vaneless diffuser expands steady system, the inside of the vaneless diffuser 12
Return flow line 121 of the both ends with opening is provided on wall, the return flow line 121 is along the radial linear of vaneless diffuser 12
Shape arrangement.The reflux import 122 of the return flow line 121 is disposed proximate to the outlet side of vaneless diffuser 12, return flow line
121 bypass outlet 123 is disposed proximate to the inlet side of vaneless diffuser 12.
Spacing between 12 import of the bypass outlet 123 and vaneless diffuser is greater than the reflux import 122 and no leaf
Spacing between the outlet of diffuser 12, the flow field condition in vaneless diffuser 12 is more preferable at this time.As shown in Figure 8,9.Fig. 8, institute in 9
Two in the flow field shown horizontally straightway be cover board 125, what is surrounded between two straightways and vaneless diffuser 12 is narrow
Long runner is return flow line 121.
The return flow line 121 is radial straight channel, and the discrete distribution in the circumferential direction of vaneless diffuser 12, circumferential direction are divided
Cloth situation can determine according to the runner after vaneless diffuser, and can symmetrical or asymmetric distribution.
121 shallow embedding of return flow line is in the interior sidewall surface of vaneless diffuser 12.It can be first in no leaf when processing and manufacturing
Radial groove is opened up in the interior sidewall surface of diffuser 12, then setting cover board 125 in radial groove upper cover can be obtained return flow line
121.The size of the return flow line 121 can comprehensively consider according to required regurgitant volume, diffuser pressure liter, flow resistance coefficient
Selection.
As shown in figs. 2 to 4, the return flow line 121 is respectively arranged with several on two inner sidewalls of vaneless diffuser 12
It is a, several being circumferentially arranged along vaneless diffuser 12 of return flow line 121.
As shown in Figure 2,3, it is provided in the return flow line 121 for making return flow line 121 circulate and close two
The headstock gear 124 switched between state；The headstock gear 124 is electrically connected with controller.The controller is to any reflux
Individually control can be achieved in headstock gear 124 in channel 121, to cooperate different working conditions and asymmetrical pig's tongue out
Part.
Headstock gear 124 among the return flow line 121 should can fast reaction, adjusted without leaf diffusion rapidly with realizing
The purpose of flow regime in device.Specifically, headstock gear 124 can be set as by the valve of Electromagnetic Control.
As shown in Figure 5,6, it is additionally provided in this system for monitoring the distribution of the pressure in vaneless diffuser 12 and pressure arteries and veins
The dynamic pressure transducer 13 of dynamic situation, distribution and institute of the dynamic pressure transducer 13 in the circumferential direction of vaneless diffuser 12
The arrangement for stating return flow line 121 is consistent, and the dynamic pressure transducer 13 is in the distribution position radially of vaneless diffuser 12
It sets including at least position at the reflux import 122 of the return flow line 121 and 123 liang of bypass outlet.The dynamic pressure sensing
The output end of device 13 is connected with the input terminal of data collector, and the output end of the data collector is connected with the controller.
As shown in Figure 5,6, the dynamic pressure transducer 13 is distributed in two disks of vaneless diffuser 12 simultaneously.
The course of work of the invention is described further with reference to the accompanying drawing.
The headstock gear 124 is connected with the output end of controller (not shown), the dynamic pressure transducer 13
Output end be connected with the input terminal of data collector (not shown), the output end of the data collector and the control
Device is connected.Pressure in 13 array of the dynamic pressure transducer monitoring vaneless diffuser 12 rises and pressure fluctuation situation, dynamic are pressed
The monitoring gained pressure condition of force snesor 13 is transferred to controller to analyze the operating status in vaneless diffuser 12.Work as control
When device judges the operating status of vaneless diffuser for stable operation, the headstock gear 124 in all return flow lines 121 is in
Closed state, the steady system of this expansion at this time do not influence the performance and efficiency of the normal operation of centrifugal compressor 10 without accordingly regulating and controlling；
When controller judges compressor behavior for astable operation or when will enter astable operation, controller issues signal
Export vaneless diffuser 12 attached to open all or part of return flow line 121 to the headstock gear 124 on return flow line 121
Close portion gas can flow back into the entrance of vaneless diffuser 12 under the action of pressure difference, at this time the stream in return flow line 121
Dynamic situation as shown in Figure 4 (flow direction that the arrow direction in Fig. 4 is gas), and then improves vaneless diffuser 12 and enters
The flow condition of mouth, increases the flow of entrance, to expand the stable operation range of vaneless diffuser.
Since controller can be controlled separately the headstock gear 124 on each return flow line 121, in the excessive feelings of regurgitant volume
Under condition, controller, which closes part return flow line, can optimize the steady effect of expansion and improve working efficiency.It is non-right for such as band spiral case
The outlet pressure condition of title increases the unlatching number of corresponding position return flow line, can match asymmetric outlet pressure condition, increases
Add and expands steady effect.
Claims (4)
1. a kind of centrifugal compressor vaneless diffuser expands steady system, it is characterised in that: the inner sidewall of the vaneless diffuser (12)
On be provided with return flow line (121) of the both ends with opening, the return flow line (121) is in along the radial direction of vaneless diffuser (12)
Rectilinear arrangement；
It is provided in the return flow line (121) for switching return flow line (121) between two states of circulation and closing
Headstock gear (124)；The headstock gear (124) electrically connects with controller；
The dynamic for monitoring the distribution and pressure fluctuation situation of the pressure in vaneless diffuser (12) is additionally provided in the system
The output end of pressure sensor (13), the dynamic pressure transducer (13) is connected with the input terminal of data collector, the number
It is connected according to the output end of collector with the controller；
The return flow line (121) is provided with several, circumferential direction row of several return flow lines (121) along vaneless diffuser (12)
Cloth；Distribution of the dynamic pressure transducer (13) in the circumferential direction of vaneless diffuser (12) and the return flow line (121)
It arranges consistent, the dynamic pressure transducer (13) includes at least institute in the distributing position radially of vaneless diffuser (12)
State position at the reflux import (122) and bypass outlet (123) two of return flow line (121)；
The controller headstock gear (124) in any return flow line (121) can be achieved individually control；
The return flow line (121) is set in the interior sidewall surface of the vaneless diffuser (12), manufacturing process are as follows: first described
Radial groove is opened up in the interior sidewall surface of vaneless diffuser (12), then setting cover board (125) in radial groove upper cover can be obtained
The return flow line (121).
2. a kind of centrifugal compressor vaneless diffuser according to claim 1 expands steady system, feature exists: the reflux is logical
The reflux import (122) in road (121) is disposed proximate to the outlet side of vaneless diffuser (12), the reflux of return flow line (121)
Outlet (123) is disposed proximate to the inlet side of vaneless diffuser (12).
3. a kind of centrifugal compressor vaneless diffuser according to claim 2 expands steady system, feature exists: described to flow back out
Spacing between mouth (123) and vaneless diffuser (12) import is greater than the reflux import (122) and vaneless diffuser (12) go out
Spacing between mouthful.
4. a kind of centrifugal compressor vaneless diffuser according to claim 1 or 2 or 3 expands steady system, feature exists: described
Return flow line (121) is respectively arranged with several on two inner sidewalls of vaneless diffuser (12), several return flow lines (121)
Along being circumferentially arranged for vaneless diffuser (12).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811593324.5A CN109779979B (en) | 2016-08-02 | 2016-08-02 | Simple and efficient vaneless diffuser stability expanding system of centrifugal compressor |
| CN201610624126.5A CN106065877B (en) | 2016-08-02 | 2016-08-02 | A kind of steady system of centrifugal compressor vaneless diffuser expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610624126.5A CN106065877B (en) | 2016-08-02 | 2016-08-02 | A kind of steady system of centrifugal compressor vaneless diffuser expansion |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811593324.5A Division CN109779979B (en) | 2016-08-02 | 2016-08-02 | Simple and efficient vaneless diffuser stability expanding system of centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106065877A CN106065877A (en) | 2016-11-02 |
| CN106065877B true CN106065877B (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811593324.5A Active CN109779979B (en) | 2016-08-02 | 2016-08-02 | Simple and efficient vaneless diffuser stability expanding system of centrifugal compressor |
| CN201610624126.5A Active CN106065877B (en) | 2016-08-02 | 2016-08-02 | A kind of steady system of centrifugal compressor vaneless diffuser expansion |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811593324.5A Active CN109779979B (en) | 2016-08-02 | 2016-08-02 | Simple and efficient vaneless diffuser stability expanding system of centrifugal compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779979A (en) * | 2016-08-02 | 2019-05-21 | 合肥通用机械研究院有限公司 | One kind being simple and efficient centrifugal compressor vaneless diffuser and expands steady system |
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| JP2008038894A (en) * | 2006-07-13 | 2008-02-21 | Mitsubishi Heavy Ind Ltd | Compressor and its operation control method |
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| US4257733A (en) * | 1978-12-26 | 1981-03-24 | Carrier Corporation | Diffuser control |
| CH646757A5 (en) * | 1980-08-20 | 1984-12-14 | Sulzer Ag | RADIAL COMPRESSORS. |
| JP2005240680A (en) * | 2004-02-26 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Centrifugal compressor |
| JP2008111369A (en) * | 2006-10-30 | 2008-05-15 | Mitsubishi Heavy Ind Ltd | Centrifugal compressor |
| CN104533838B (en) * | 2014-12-18 | 2017-06-06 | 珠海格力电器股份有限公司 | A kind of adjustable diffuser |
| CN109779979B (en) * | 2016-08-02 | 2021-04-27 | 合肥通用机械研究院有限公司 | Simple and efficient vaneless diffuser stability expanding system of centrifugal compressor |
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2016
- 2016-08-02 CN CN201811593324.5A patent/CN109779979B/en active Active
- 2016-08-02 CN CN201610624126.5A patent/CN106065877B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038894A (en) * | 2006-07-13 | 2008-02-21 | Mitsubishi Heavy Ind Ltd | Compressor and its operation control method |
| JP2008163879A (en) * | 2006-12-28 | 2008-07-17 | Toyota Industries Corp | Centrifugal compressor |
| WO2011070808A1 (en) * | 2009-12-10 | 2011-06-16 | 三菱重工業株式会社 | Centrifugal compressor |
| CN102297149A (en) * | 2011-09-08 | 2011-12-28 | 上海中科高等研究院 | Device and method for widening stable operation area of centrifugal compressor, and centrifugal compressor |
| CN203051242U (en) * | 2013-01-23 | 2013-07-10 | 上海中科高等研究院 | Centrifugal compressor steam ejection stability expanding device with steam reinjection, and centrifugal compressor |
| CN103953560A (en) * | 2014-04-18 | 2014-07-30 | 合肥通用机械研究院 | Compressor expands steady system and is applied to compressor mechanism of this system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779979A (en) * | 2016-08-02 | 2019-05-21 | 合肥通用机械研究院有限公司 | One kind being simple and efficient centrifugal compressor vaneless diffuser and expands steady system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106065877A (en) | 2016-11-02 |
| CN109779979B (en) | 2021-04-27 |
| CN109779979A (en) | 2019-05-21 |
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