CN112268016A - End wall pre-rotation guide vane structure - Google Patents
End wall pre-rotation guide vane structure Download PDFInfo
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- CN112268016A CN112268016A CN202011044551.XA CN202011044551A CN112268016A CN 112268016 A CN112268016 A CN 112268016A CN 202011044551 A CN202011044551 A CN 202011044551A CN 112268016 A CN112268016 A CN 112268016A
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- rotation guide
- compressor
- guide vane
- guide vanes
- end wall
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- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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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
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an end wall pre-rotation guide vane structure which mainly comprises a pipe body and pre-rotation guide vanes inside the pipe body, wherein the pre-rotation guide vanes are arranged on the inner wall of the pipe body and used for guiding the direction of incoming flow gas in a pipeline. The pre-rotation guide vane can change the gas flowing form in the pipeline, so that the incoming gas forms pre-rotation flow after passing through the pre-rotation guide vane. The structure can be used at the front end of the inlet of the compressor, the prewhirl of the generated air inlet can better adapt to the air inlet requirement of the compressor, thereby widening the flow range of the compressor, improving the working efficiency of the compressor and achieving the aims of improving the performance of the compressor and quickly adjusting the performance of the compressor.
Description
Technical Field
The invention belongs to the technical field of exhaust gas turbocharging, and particularly relates to an end wall pre-rotation guide vane structure and an asymmetric end wall pre-rotation guide vane structure.
Background
The requirements for high power density and plateau power recovery of internal combustion engines require continuous improvement and optimization of the supercharging system performance so that the supercharging system can be well matched with the engine. With the continuous improvement of the supercharging pressure ratio, the Mach number of the inlet of the impeller is continuously increased, and the internal flow of the centrifugal compressor is converted into a transonic flow structure. The stable flow range of the supercharger is narrowed and the efficiency is reduced due to the complicated transonic shock waves, vortex flow separation and the like. The inlet flow field structure, especially the distribution of the inlet attack angle, has a decisive influence on the performance (pressure ratio, efficiency and stable working range) of the centrifugal compressor.
Therefore, the air compressor air inlet flow needs to be controlled to form air inlet pre-swirl flow so as to change an air inlet attack angle to meet the requirement, widen the stable working range and improve the performance.
And the throat position of the compressor is most likely to generate irregular flow, and the gas flow field structure of the position has great influence on the overall performance of the compressor, so that the throat position has more strict requirements on an air inlet attack angle, the air inlet flow of the position needs to be controlled particularly, air inlet pre-swirl flow is formed to change the air inlet attack angle, shock waves, flow separation and the like are reduced and eliminated, the working requirement of the compressor is met, the stable working range of the compressor is widened, and the performance is improved.
Disclosure of Invention
In view of this, the present invention is directed to an end wall pre-swirl vane structure and an asymmetric end wall pre-swirl vane structure for rapidly adjusting and improving the performance of a centrifugal compressor.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in the first aspect, the invention provides an end wall pre-rotation guide vane structure, which comprises a pipeline pipe body, wherein the pipeline pipe body is of a stepped pipe structure comprising a front section and a rear section, the inner diameter of a front end pipe is smaller than that of a rear end pipe, a plurality of pre-rotation guide vanes are uniformly arranged on the inner wall of the front end pipe, the front ends of the pre-rotation guide vanes are inflow gas inlet ends, and the tail ends of the pre-rotation guide vanes are airflow outlet ends.
Compared with the prior art, the end wall pre-rotation guide vane structure has the following advantages:
the end wall pre-swirl guide vane structure can control the air inlet flow of the air compressor to form air inlet pre-swirl flow so as to change an air inlet attack angle to adapt to air inlet requirements, widen the stable working range and improve the performance. Meanwhile, the end wall pre-rotation guide vane structure can be conveniently connected to the front of the inlet of the compressor to rapidly improve and adjust the performance of the original compressor.
In the aspect of 2, the invention provides an asymmetric end wall pre-rotation guide vane structure, which comprises a pipeline pipe body, wherein the pipeline pipe body (1) is of a stepped pipe structure comprising a front section and a rear section, the inner diameter of a front end pipe is smaller than that of a rear end pipe, a plurality of pre-rotation guide vanes (2) are arranged in an angle range of 30-60 degrees of the inner wall of the front end pipe, the front ends of the pre-rotation guide vanes (2) are inflow gas inlet ends, and the tail ends of the pre-rotation guide vanes are airflow outlet ends.
Compared with the prior art, the asymmetric end wall pre-rotation guide vane structure has the following advantages:
when the asymmetric end wall pre-rotation guide vane structure is connected to the air compressor, the pre-rotation guide vane corresponds to the throat position of the air compressor, and can particularly control the air inlet flow at the throat position of the air compressor, so that air inlet pre-rotation is formed, an inlet flow field structure at the throat position is optimized, shock waves, flow separation and the like are reduced and eliminated, the working requirement of the air compressor is met, the stable working range of the air compressor is expanded, the working efficiency is improved, and the aims of quickly adjusting and improving the performance of the centrifugal air compressor are fulfilled.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of the application of the structure described in embodiment 1 of the present invention in a supercharging system.
Fig. 3 is a schematic view of the tip angle of the pre-rotation guide vane in embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram according to embodiment 2 of the present invention.
Fig. 5 is a schematic diagram of the application of the structure described in embodiment 2 of the present invention in a supercharging system.
Fig. 6 is a schematic angle diagram of the arrangement range of the pre-rotation guide vane in embodiment 2 of the present invention.
Fig. 7 is a schematic view of the tip angle of the pre-rotation guide vane in embodiment 2 of the present invention.
Description of reference numerals:
1-a pipeline body; 2-pre-rotation guide vanes; 3-end wall pre-swirl vane configuration; 4, an air compressor; 5-asymmetric end wall pre-swirl vane structure.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the case of the example 1, the following examples are given,
the utility model provides an end wall is stator structure soon in advance, as shown in figure 1, including the pipeline body, pipeline body 1 is the ladder tubular structure of two sections around including, and the internal diameter of front end pipe is less than the internal diameter of rear end pipe, and a plurality of guide vanes 2 of rotating in advance have evenly arranged to the inner wall of front end pipe, the front end of guide vane 2 of rotating in advance is the incoming flow gas inlet end, the end is airflow outlet end.
Preferably, the height range of the pre-rotation guide vane 2 is 1/8-1/3 of the inner diameter of the front end pipe, and the tail end angle alpha range of the pre-rotation guide vane 2 is-60 degrees, as shown in fig. 3.
Preferably, the number of the pre-rotation guide vanes 2 ranges from 6 to 10.
As shown in fig. 2, the end wall pre-swirl guide vane structure 3 is connected to the front end of the inlet of a compressor 4 in a supercharging system, when the supercharging system works, the airflow passes through the end wall pre-swirl guide vane structure before entering the inlet of the compressor, at this time, the flow direction of the airflow is controlled due to the action of the pre-swirl guide vanes, so that the pre-swirl flow is generated in the intake airflow, the attack angle of the airflow entering the impeller of the compressor is changed, the intake requirement of the compressor, particularly the high pressure ratio compressor, is met, the stable working range is widened, and the performance is improved.
In the case of the example 2, the following examples are given,
the asymmetric end wall pre-rotation guide vane structure comprises a pipeline pipe body, wherein the pipeline pipe body 1 is a stepped pipe structure comprising a front section and a rear section, the inner diameter of a front end pipe is smaller than that of a rear end pipe, a plurality of pre-rotation guide vanes 2 are arranged in an angle range of 30-60 degrees of the inner wall of the front end pipe, and the front ends of the pre-rotation guide vanes 2 are an incoming flow gas inlet end and the tail ends of the pre-rotation guide vanes are an airflow outlet end.
Preferably, the height range of the pre-rotation guide vane 2 is 1/8-1/3 of the inner diameter of the front end pipe, and the tail end angle alpha range of the pre-rotation guide vane 2 is-60 degrees, as shown in fig. 7.
Preferably, the number of the pre-rotation guide vanes 2 ranges from 3 to 6.
As shown in fig. 5, the asymmetric end wall pre-rotation guide vane structure 5 is connected to the front end of the inlet of the compressor 4 in the supercharging system, and the position of the pre-rotation guide vane corresponds to the position of the compressor throat. When the supercharging system works, airflow passes through the asymmetric end wall pre-rotation guide vane structure before entering the inlet of the compressor, and at the moment, the pre-rotation guide vane acts to control the inflow of the air at the throat position of the compressor to form inflow pre-rotation, so that the inflow attack angle of the airflow entering the throat position of the compressor is changed, the inflow requirement of the compressor, particularly a high-pressure ratio compressor, is met, the stable working range of the compressor is widened, and the performance of the compressor is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides an end wall prewhirl stator structure, includes the pipeline body, its characterized in that: the pipeline body (1) is a stepped pipe structure comprising a front section and a rear section, the inner diameter of a front end pipe is smaller than that of a rear end pipe, a plurality of pre-rotating guide vanes (2) are uniformly arranged on the inner wall of the front end pipe, and the front ends of the pre-rotating guide vanes (2) are inflow gas inlet ends and the tail ends are airflow outlet ends.
2. The endwall pre-swirl vane structure of claim 1, wherein: the height range of the pre-rotation guide vane (2) is 1/8-1/3 of the inner diameter of a front-end pipe, and the tail end angle alpha range of the pre-rotation guide vane (2) is-60 degrees.
3. The endwall pre-swirl vane structure of claim 1, wherein: the number of the pre-rotation guide vanes (2) ranges from 6 to 10.
4. The utility model provides an asymmetric end wall prewhirl stator structure, includes the pipeline body, its characterized in that: the pipeline body (1) is of a stepped pipe structure comprising a front section and a rear section, the inner diameter of a front end pipe is smaller than that of a rear end pipe, a plurality of pre-rotation guide vanes (2) are arranged in an angle range of 30-60 degrees of the inner wall of the front end pipe, the front ends of the pre-rotation guide vanes (2) are inflow gas inlet ends, and the tail ends of the pre-rotation guide vanes are airflow outlet ends.
5. The asymmetric endwall pre-swirl vane structure of claim 4, wherein: the height range of the pre-rotation guide vane (2) is 1/8-1/3 of the inner diameter of a front-end pipe, and the tail end angle alpha range of the pre-rotation guide vane (2) is-60 degrees.
6. The asymmetric endwall pre-swirl vane structure of claim 4, wherein: the number range of the pre-rotation guide vanes (2) is 3-6.
7. The asymmetric endwall pre-swirl vane structure of claim 4, wherein: when the asymmetric end wall pre-rotation guide vane structure is connected to the gas compressor, the pre-rotation guide vane (2) corresponds to the throat position of the gas compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044551.XA CN112268016A (en) | 2020-09-28 | 2020-09-28 | End wall pre-rotation guide vane structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044551.XA CN112268016A (en) | 2020-09-28 | 2020-09-28 | End wall pre-rotation guide vane structure |
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| Publication Number | Publication Date |
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| CN112268016A true CN112268016A (en) | 2021-01-26 |
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| CN202011044551.XA Pending CN112268016A (en) | 2020-09-28 | 2020-09-28 | End wall pre-rotation guide vane structure |
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| CN (1) | CN112268016A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944654A (en) * | 2021-11-26 | 2022-01-18 | 中国北方发动机研究所(天津) | Wide-flow volute structure |
| CN113944656A (en) * | 2021-11-26 | 2022-01-18 | 中国北方发动机研究所(天津) | Variable cross-section end wall pre-rotation guide vane pipeline structure |
| CN114352559A (en) * | 2022-02-16 | 2022-04-15 | 杭州老板电器股份有限公司 | Air inlet ring assembly, centrifugal fan and range hood |
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| US20070266705A1 (en) * | 2006-05-22 | 2007-11-22 | Wood Terry G | Engine intake air compressor and method |
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| CN209293857U (en) * | 2018-12-17 | 2019-08-23 | 沈阳金行标科技有限公司 | A kind of turbocharger |
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2020
- 2020-09-28 CN CN202011044551.XA patent/CN112268016A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03253797A (en) * | 1990-03-02 | 1991-11-12 | Nikkiso Co Ltd | Axial flow inducer with step |
| US20070266705A1 (en) * | 2006-05-22 | 2007-11-22 | Wood Terry G | Engine intake air compressor and method |
| KR20150020613A (en) * | 2012-06-18 | 2015-02-26 | 보르그워너 인코퍼레이티드 | Compressor cover for turbochargers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944654A (en) * | 2021-11-26 | 2022-01-18 | 中国北方发动机研究所(天津) | Wide-flow volute structure |
| CN113944656A (en) * | 2021-11-26 | 2022-01-18 | 中国北方发动机研究所(天津) | Variable cross-section end wall pre-rotation guide vane pipeline structure |
| CN113944656B (en) * | 2021-11-26 | 2024-04-30 | 中国北方发动机研究所(天津) | Variable cross-section end wall pre-rotation guide vane pipeline structure |
| CN114352559A (en) * | 2022-02-16 | 2022-04-15 | 杭州老板电器股份有限公司 | Air inlet ring assembly, centrifugal fan and range hood |
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Application publication date: 20210126 |