CN208858644U - A kind of centrifugal compressor with narrowed type diffuser and local guide vane - Google Patents
A kind of centrifugal compressor with narrowed type diffuser and local guide vane Download PDFInfo
- Publication number
- CN208858644U CN208858644U CN201820892826.7U CN201820892826U CN208858644U CN 208858644 U CN208858644 U CN 208858644U CN 201820892826 U CN201820892826 U CN 201820892826U CN 208858644 U CN208858644 U CN 208858644U
- Authority
- CN
- China
- Prior art keywords
- diffuser
- narrowed
- guide vane
- wheel cap
- centrifugal compressor
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of centrifugal compressor with narrowed type diffuser and local guide vane, including air inlet section, impeller, the narrowed narrowed type diffuser for being respectively occurring at wheel cap side and hub side, it further include local guide vane, the local guide vane is mounted on the wheel cap side wall surface of the narrowed diffuser, and the wheel cap lateral edge of the narrowed type diffuser successively includes wheel cap side changeover portion and wide section of wheel cap side far from the direction of air inlet section；The hub side wall surface of the narrowed type diffuser successively includes wide section of first wheel side, hub side changeover portion and wide section of the second hub side along the direction far from air inlet section.The scheme that the utility model is combined by narrowing type diffuser with local guide vane, can effectively reduce friction loss and eddy current loss in diffuser, and then improve centrifugal compressor overall efficiency.
Description
Technical field
The utility model belongs to impeller machinery technical field, more particularly to one kind there is narrowed type diffuser and part to lead
The centrifugal compressor of leaf.
Background technique
Centrifugal compressor is a kind of blade mechanism for converting mechanical energy to fluid working substance energy, because having flow
Greatly, the advantages that compact-sized, is widely used in energy source and power and chemical field.In centrifugal compressor, fluid working substance is with intimate axis
To angle be sucked into impeller, radially flow out impeller, flow into diffuser.Fluid working substance is in impeller by centrifugal force, kinetic energy and pressure
It can rise；In diffuser, kinetic energy is further converted to pressure energy, completes gas boost process.It is complicated for operating condition from
Heart compressor expands steady running condition frequently with vaneless diffuser.
Centrifugal compressor vaneless diffuser flow section increases with radius and is increased, and is based on continuity equation, flow velocity can not
Disconnected reduction, to complete the process that kinetic energy is converted to pressure energy.It is reduced just because of flow velocity, boundary layer flow may not overcome
Bulk viscosity resistance generates very big eddy current loss, influences operational efficiency so that boundary layer separation occur.And flow is smaller, point
It is bigger from whirlpool size.So should inhibit as far as possible it that boundary layer separation occurs under full working scope, wherein flowing from the angle of eddy current loss
Speed is very crucial factor.In addition, fluid moves in vaneless diffuser for log spiral, flow path is longer, generates
Very big flowage friction loss.Improve flow path, can set about from improving flow velocity or adding local guide vane.Flow velocity is improved,
Its radial velocity increases accordingly, and fluid faster flows out diffuser, and flow path reduces, and then reduces friction loss.Guide vane can be with
Changing flow path, and then realizes lesser flowage friction loss, this is also the vaned diffuser reason high-efficient in design point,
But its blade is there are impact loss, and stable operation narrow range.
Utility model content
The utility model discloses a kind of centrifugal compressor with narrowed type diffuser and local guide vane, to reduce flowing
Friction loss and eddy current loss.The centrifugal compressor core is made of impeller, narrowed type diffuser and local guide vane, is narrowed
Type diffuser narrows and is respectively occurring at wheel cap side and hub side, and the wall surface molded line of two sides is made of changeover portion and wide section respectively,
Local guide vane is mounted on narrowed type diffuser wheel cap side wall surface.The scheme combined by narrowing type diffuser with local guide vane,
Friction loss and eddy current loss in diffuser can be effectively reduced, and then improves centrifugal compressor overall efficiency.
The utility model adopts the following technical solution realizes:
A kind of centrifugal compressor with narrowed type diffuser and local guide vane, including air inlet section, impeller, narrow and send out respectively
The raw narrowed type diffuser in wheel cap side and hub side, further includes local guide vane, and the local guide vane is mounted on described narrow
The wheel cap side wall surface of diffuser, the wheel cap lateral edge of the narrowed type diffuser successively include wheel cap side mistake far from the direction of air inlet section
Cross section and wide section of wheel cap side；The hub side wall surface of the narrowed type diffuser successively includes first along the direction far from air inlet section
Wide section of hub side, hub side changeover portion and wide section of the second hub side.
Further, wheel cap side changeover portion and hub side changeover portion narrow from starting point and narrow rate with the increase of radius
And reduce, the purpose is to the low momentum fluid at diffuser intake is more, easily generation flow separation phenomenon causes flowing to be damaged
The increase of mistake can be improved the fluid velocity at this, reduce the generation of flow separation phenomenon, hereafter, expand by shrinking from starting point
Depressor width can be slowly varying to width identical with outlet.
Further, the narrowed diffuser inlet and outlet semidiameter is L1, the part guide vane exit radius and the receipts
The difference of narrow diffuser intake radius is L2, and the value of L2/L1 is 0.6-0.9, and the purpose is to effectively realize the water conservancy diversion work near wall
With guide vane is too short, cannot effectively realize the change of flow direction.
Further, the difference of the wheel cap side changeover portion exit radius and the narrowed diffuser intake radius is L3, L3/
The value of L1 is 0.25-0.75, and the purpose is to take into account the purpose and diffuser boosting capability that improve flow velocity as far as possible.
Further, it is characterised in that: the hub side changeover portion inlet radius and the narrowed diffuser intake radius
Difference be L4, the value of L4/L1 is 0.1-0.4, and the purpose is to nearly wheel hub the initial segments, flow separation phenomenon do not occur, therefore not
It need to narrow, and utilize its diffusion ability as far as possible, from the wheel hub second half section, be easy to happen segregation phenomenon, therefore postpone in wheel hub
It narrows.
Further, the difference of the hub side changeover portion exit radius and the narrowed type diffuser intake radius is L5,
The value of L5/L1 is 0.6-0.9, and the purpose is to take into account the purpose and diffuser boost capability that improve flow velocity.
Further, the difference of the local vane inlet radius and the narrowed diffuser intake radius is L6, L6/L1's
Value is 0.1-0.4, and the purpose is to so that guide vane is played guide functions earlier in diffuser.
Further, if B1 is the distance between the wheel cap side changeover portion starting point and wide section of first wheel side, B2
For the narrowed amount of diffuser wheel cap side, B3 is the narrowed amount of diffuser wheel disc side, and the value of B2/B1 is 0.1-0.2, the value of B3/B1
For 0.1-0.2, the purpose is to while effectively improving flow velocity, be unlikely to undue weakening diffuser boost capability.
Further, H is guide vane top to wide section of wheel cap of distance, and H/B1 value is 0.1-0.3, and the purpose is to take into account stream
Dynamic friction loss and loss of incidence easily cause biggish friction loss because the fluid trace at the nearly wheel cap of diffuser is longer,
It guides air-flow more early to flow out diffuser by local guide vane, the friction loss at nearly wheel cap can be effectively reduced；Far from wheel cap
Flowage friction loss it is smaller, therefore do not need the guidance of guide vane, the performance of off-design behaviour can be improved in no guide vane diffuser,
Because there is loss of incidence of the guide vane diffuser under off-design behaviour larger.
Compared with prior art, the utility model has the following beneficial effects:
The scheme that the utility model is combined by narrowing type diffuser with local guide vane, can effectively reduce in diffuser and rub
It wears eddy current loss of becoming estranged, and then improves centrifugal compressor overall efficiency.
Detailed description of the invention
Fig. 1 is to have the meridian figure for narrowing type diffuser and local guide vane structure in the utility model.
Fig. 2 is that type diffuser and local guide vane section relevant parameter schematic diagram are narrowed in the utility model.
Fig. 3 is local guide vane distribution map in the utility model.
Figure label:
1- air inlet section；2- impeller；3- narrows type diffuser；The part 4- guide vane；5- wheel cap side changeover portion；6- wheel cap side is wide
Section；Wide section of 7- first wheel side (at diffuser intake)；8- hub side changeover portion；Wide section of (diffuser of the second hub side of 9-
Exit).
Specific embodiment
The utility model is described further with reference to the accompanying drawings and examples.
The utility model phenomenon too long for existing centrifugal compressor boundary layer separation and flow path, leads to complete machine
The problem of capable of declining, proposes a kind of centrifugal compressor with narrowed type diffuser and local guide vane, sends out respectively wherein narrowing
In diffuser wheel cap side and hub side, local guide vane is mounted on wheel cap side for life.The whole of centrifugal compressor can be improved in structure design
Machine performance, especially when centrifugal compressor operates under low flow rate condition.
As shown in Figure 1 to Figure 3, a kind of centrifugal compressor with narrowed type diffuser and local guide vane, including air inlet section
1, impeller 2, the narrowed narrowed type diffuser 3 for being respectively occurring at wheel cap side and hub side, local guide vane 4, the local guide vane 4
It is mounted on the wheel cap side wall surface of the narrowed diffuser 3, the wheel cap lateral edge of the narrowed type diffuser 3 is far from the side of air inlet section 1
To successively including wide section 6 of wheel cap side changeover portion 5 and wheel cap side；The hub side wall surface of the narrowed type diffuser 3 along far from into
The direction of gas section 1 successively includes wide section 7 of first wheel side, hub side changeover portion 8 and wide section 9 of the second hub side.
Specifically, wheel cap side changeover portion 5 and hub side changeover portion 8 narrow from starting point and narrow rate with the increasing of radius
Add and reduces.
Specifically, it is L1 that the narrowed diffuser 3, which imports and exports semidiameter, part 4 exit radius of guide vane with it is described
The difference for narrowing 3 inlet radius of diffuser is L2, and the value of L2/L1 is 0.6-0.9.
Specifically, the difference of 5 exit radius of wheel cap side changeover portion and 3 inlet radius of narrowed diffuser is L3,
The value of L3/L1 is 0.25-0.75.
Specifically, the difference of 8 inlet radius of hub side changeover portion and 3 inlet radius of narrowed diffuser is L4,
The value of L4/L1 is 0.1-0.4.
Specifically, the difference of 8 exit radius of hub side changeover portion and narrowed 3 inlet radius of type diffuser is
The value of L5, L5/L1 are 0.6-0.9.
Specifically, the difference of part 4 inlet radius of guide vane and 3 inlet radius of narrowed diffuser is L6, L6/L1
Value be 0.1-0.4.
Specifically, set B1 as wide section the distance between 7 of 5 starting point of wheel cap side changeover portion and first wheel side,
B2 is the narrowed amount of diffuser wheel cap side, and B3 is the narrowed amount of diffuser wheel disc side, and the value of B2/B1 is 0.1-0.2, B3/B1's
Value is 0.1-0.2.
Specifically, H is guide vane top to wide section of wheel cap of distance, H/B1 value is 0.1-0.3.
The working principle of above-described embodiment are as follows:
In centrifugal compressor, fluid working substance is risen in impeller by centrifugal force, kinetic energy and pressure energy；In diffuser, move
Can further be converted to pressure energy, complete gas boost process, but due to flowing in diffuser and unstable, be easy in wheel cap side or
Backflow phenomenon, which occurs, for person's hub side causes loss to increase.Diffuser can improve the flow velocity of wall surface attachment after narrowing, to avoid sending out
Raw boundary layer separation, improves the stability of flowing and reduces loss, can effectively inhibit wheel cap side and wheel by the utility model
The flow separation of hub side；Increase local guide vane in wheel cap side, can effectively guide the fluid of near wall to flow out diffuser, reduce flowing
The length in path is to reduce flowage friction loss.
Above-described embodiment only adds local guide vane, can take into account as much as possible flowage friction loss, impact loss and
Stable operation range improves diffuser low velocity fluid bolus flow speed, limits flow path using local guide vane, thus improve from
Heart compressor overall efficiency.
Above-described embodiment is only the preferable example of the utility model, is not to the utility model embodiment
It limits, for those of ordinary skill in the art, other different forms can also be made on the basis of the above description
Variation or variation, there is no necessity and possibility to exhaust all the enbodiments, all spirit and original in the utility model
Made any modifications, equivalent replacements, and improvements etc. within then, should be included in the claims of the utility model
Within.
Claims (9)
1. a kind of centrifugal compressor with narrowed type diffuser and local guide vane, including air inlet section (1), impeller (2), narrowed point
It Fa Sheng not be in the narrowed type diffuser (3) of wheel cap side and hub side, which is characterized in that further include local guide vane (4), the office
Portion's guide vane (4) is mounted on the wheel cap side wall surface of the narrowed diffuser (3), and the wheel cap lateral edge of the narrowed type diffuser (3) is remote
Direction from air inlet section (1) successively includes wheel cap side changeover portion (5) and wide section of wheel cap side (6)；The narrowed type diffuser (3)
Hub side wall surface along the direction far from air inlet section (1) successively include wide section of first wheel side (7), hub side changeover portion (8)
With wide section of the second hub side (9).
2. according to claim 1 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
It states wheel cap side changeover portion (5) and hub side changeover portion (8) and is narrowed from starting point and narrow rate and reduce with the increase of radius.
3. according to claim 1 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
State narrowed diffuser (3) inlet and outlet semidiameter be L1, it is described part guide vane (4) exit radius and the narrowed diffuser (3) into
The difference of port radius is L2, and the value of L2/L1 is 0.6-0.9.
4. according to claim 3 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
The difference for stating wheel cap side changeover portion (5) exit radius and the narrowed diffuser (3) inlet radius is L3, and the value of L3/L1 is 0.25-
0.75。
5. according to claim 3 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
The difference for stating hub side changeover portion (8) inlet radius and the narrowed diffuser (3) inlet radius is L4, and the value of L4/L1 is 0.1-
0.4。
6. according to claim 3 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
The difference for stating hub side changeover portion (8) exit radius and narrowed type diffuser (3) inlet radius is L5, and the value of L5/L1 is
0.6-0.9。
7. according to claim 3 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: institute
The difference for stating local guide vane (4) inlet radius and the narrowed diffuser (3) inlet radius is L6, and the value of L6/L1 is 0.1-0.4.
8. according to claim 1 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: set
B1 is the distance between wheel cap side changeover portion (5) starting point and first wheel side wide section (7), and B2 is diffuser wheel cap side
Narrowed amount, B3 is the narrowed amount of diffuser wheel disc side, and the value of B2/B1 is 0.1-0.2, and the value of B3/B1 is 0.1-0.2.
9. according to claim 8 have the centrifugal compressor for narrowing type diffuser and local guide vane, it is characterised in that: H
It is guide vane top to wide section of wheel cap of distance, H/B1 value is 0.1-0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892826.7U CN208858644U (en) | 2018-06-11 | 2018-06-11 | A kind of centrifugal compressor with narrowed type diffuser and local guide vane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892826.7U CN208858644U (en) | 2018-06-11 | 2018-06-11 | A kind of centrifugal compressor with narrowed type diffuser and local guide vane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208858644U true CN208858644U (en) | 2019-05-14 |
Family
ID=66411738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820892826.7U Active CN208858644U (en) | 2018-06-11 | 2018-06-11 | A kind of centrifugal compressor with narrowed type diffuser and local guide vane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208858644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962153A (en) * | 2023-03-17 | 2023-04-14 | 潍柴动力股份有限公司 | Compressor and engine with narrowed runner width at noon of transition section |
-
2018
- 2018-06-11 CN CN201820892826.7U patent/CN208858644U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962153A (en) * | 2023-03-17 | 2023-04-14 | 潍柴动力股份有限公司 | Compressor and engine with narrowed runner width at noon of transition section |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110529410B (en) | Mixed flow fan | |
| CN106224249B (en) | Low noise self-priming combination pump | |
| CN102562651A (en) | High-efficiency wind-powered centrifugal pump impeller | |
| CN208858644U (en) | A kind of centrifugal compressor with narrowed type diffuser and local guide vane | |
| CN104832460B (en) | A kind of diffused guide ring for matching pump radial asymmetrical diffuser | |
| CN110374925B (en) | Double-layer current collector and mixed flow fan assembled with same | |
| CN207246120U (en) | A kind of new radial guiding impeller used for electric engine of cleaner | |
| CN207278564U (en) | A kind of non-equidistant blade solid-liquid two-phase blowdown pump impeller | |
| CN104806573B (en) | A kind of centrifugal water pump power-economizing method and centrifugal water pump export diversion energy-saving device | |
| CN109098974A (en) | It is a kind of can gas-liquid delivery high-lift multi-stage side channel pump | |
| CN206071889U (en) | A kind of low noise self-priming combination pump | |
| CN206054312U (en) | High-efficient energy-saving centrifugal pump | |
| CN111535974A (en) | Low-water-head large-flow mixed-flow water turbine with double-inlet volute | |
| CN111535973A (en) | Low specific speed double-inlet volute mixed-flow water turbine suitable for cooling tower | |
| CN100427753C (en) | Mixed flow type water turbin having H-type flow path rotary wheel | |
| CN209539573U (en) | A kind of efficient two stage centrifugal regeneration pump | |
| CN203146426U (en) | Novel axial flow pump | |
| CN203035616U (en) | Pumping chamber for volute mixed-flow pump | |
| CN109611346A (en) | Centrifugal compressor and its design method | |
| CN203488256U (en) | Novel self-absorption centrifugal peripheral pump | |
| CN109281760A (en) | Gas-turbine unit | |
| CN210343838U (en) | Open impeller and small-flow high-lift single-stage centrifugal pump using same | |
| CN114718904A (en) | Pneumatic structure, compressor, dust catcher | |
| CN201705730U (en) | Volute type structure of tangent pump body | |
| CN104235055B (en) | A kind of hydraulic model method for designing of big diameter elbow slurry circulating pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |