CN208578777U - A kind of diffuser for tiny engine centrifugal compressor - Google Patents
A kind of diffuser for tiny engine centrifugal compressor Download PDFInfo
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- CN208578777U CN208578777U CN201821092908.XU CN201821092908U CN208578777U CN 208578777 U CN208578777 U CN 208578777U CN 201821092908 U CN201821092908 U CN 201821092908U CN 208578777 U CN208578777 U CN 208578777U
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- diffuser
- wheel disc
- centrifugal compressor
- tiny engine
- radial
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Abstract
The utility model provides a kind of diffuser for tiny engine centrifugal compressor, including diffuser wheel disc and diffuser vane, and the diffuser wheel disc is integrally formed, is seamlessly transitted using fillet, and has arc transition from the edge of diffuser wheel disc to the center point；Multiple diffuser vanes are evenly arranged on diffuser wheel disc along axial direction, the edge of the diffuser wheel disc is provided with the radial fixing device for being connected with engine housing, the axial securing means for impeller for being connected with fore bearing is provided at the central circular of the diffuser wheel disc, the utility model provides one kind and avoids surge, reduces the new micro engine diffuser of airflow pressure losses.
Description
Technical field
The utility model relates to aero-engine technology fields, and in particular to one kind is used for tiny engine centrifugal compressor
Diffuser.
Background technique
With a kind of continuous extensive, turbomachine production of the compressor as core of Modern Engine machine applications range
Product, it is also higher and higher to the efficiency of its demand.Diffuser is the critical component of centrifugal compressor, is the weight that air-flow is increased to pressure ratio
Device is wanted, quality directly affects engine performance and mechanical efficiency, pressure ratio parameter, therefore its processing technology is always to manufacture
One important topic of industry.Diffuser is generally required to obtain optimum performance in design point, it can be maximum by impeller outlet gas
Kinetic energy be converted into static energy.Diffuser is mounted on the outlet of compressor impeller, and the main function of diffuser is exactly from impeller
The gas kinetic energy of high speed is effectively converted into kinetic energy, to improve gas by the flow slowing down with larger kinetic energy out
Pressure, used for subsequent equipment, while being lowered into the air velocity of combustion chamber, therefore diffuser is to improving compressor
The efficiency of combustion significant effect of whole efficiency and combustion chamber.
Traditional diffuser, there are radial directions and two groups of blades of axial blade, and two groups of blades, which excessively locate high pressure draught, to be generated
Disengagement zone, and part high pressure draught is lost, while will appear surge fault and nargin reduction.At this point, finding a kind of efficiency more
High diffuser is particularly important with improving the performance of compressor.
Utility model content
In view of the deficiencies in the prior art and insufficient, the purpose of this utility model is to provide one kind to be used for miniature hair
The diffuser of motivation centrifugal compressor, diffuser vane is divided into radial and axial two sections in the prior art, and intersection can not be smooth
Transition, air-flow generate separated region in radial blade rear, and there are greater loss, surge margins to reduce for air-flow, occurs surge
Conventional radial is synthesized one group of blade by the probability of failure, the utility model with axial blade, and with diffuser impeller disk shape point
Cloth provides one kind and avoids surge, reduces the new micro engine diffuser of airflow pressure losses.
The technical solution of the utility model is as follows:
A kind of diffuser for tiny engine centrifugal compressor, including diffuser wheel disc and diffuser vane, it is described
Diffuser wheel disc is integrally formed, and is seamlessly transitted using fillet, and has arc transition from the edge of diffuser wheel disc to the center point；
Multiple diffuser vanes are evenly arranged on diffuser wheel disc along axial direction, are provided with and are used in the edge of the diffuser wheel disc
The radial fixing device being connected with engine housing is provided at the central circular of the diffuser wheel disc and is used for and fore bearing
Connected axial securing means for impeller.
Preferably, the diffuser vane be one group of blade along diffuser wheel disc distribution of shapes, diffuser vane with it is micro-
H type engine h front housing, diffuser wheel disc collectively constitute the meridional channel of circulation airflow.
Preferably, the direction of circulation airflow is radial in the meridional channel.
Preferably, the intersection of the diffuser vane root and diffuser wheel disc uses five-axis NC machine center finish-milling
Technique manufacture.
Preferably, the radial fixing device and axial securing means for impeller are arranged circumferentially.
Compared with the prior art, the utility model has the following advantages:
(1) conventional radial is synthesized one group of blade by the utility model in structure with axial blade, and with diffuser impeller
The distribution of disk shape, makes the axial flow from blower outlet turn to seamlessly transit between radial air flow, to avoid air-flow in axial direction
Disengagement zone is generated between radial direction, effectively improves surge margin, prevents the appearance of engine surge failure.
(2) the utility model using fillet seamlessly transit, there is no air radial direction shaft to energy loss.
(3) the utility model has the advantages of simple structure, practical, need to finish blade by two groups of script and be reduced to one group,
Procedure of processing is effectively simplified, and high pressure draught generates Disengagement zone elimination between axial direction and radial direction, is effectively improved surge margin, is prevented
The appearance of engine surge failure.
Detailed description of the invention
Fig. 1 is overlooking structure diagram of the utility model for the diffuser of tiny engine centrifugal compressor；
Fig. 2 is the schematic diagram of the section structure of the utility model for the diffuser of tiny engine centrifugal compressor；
The appended drawing reference of the utility model lists as follows:
1- diffuser wheel disc, 2- diffuser vane, 3- radial fixing device, 4- axial securing means for impeller.
Specific embodiment
Specific embodiment of the present invention is described with reference to the accompanying drawings and embodiments:
It should be noted that structure, ratio, the size etc. illustrated in this specification institute attached drawing, only to cooperate explanation
The revealed content of book is not intended to limit the utility model enforceable so that those skilled in the art understands and reads
Qualifications, the modification of any structure, the change of proportionate relationship or the adjustment of size, can be generated not influencing the utility model
The effect of and the purpose that can reach under, should all still fall in the revealed technology contents of the utility model and obtain the range that can cover
It is interior.
Also, it is understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, rather than can be real to limit the utility model
The range applied, relativeness are altered or modified, under the content of no substantial changes in technology, can be real when being also considered as the utility model
The scope applied.In addition, term " first ", " second " etc. is used for description purposes only, and is not understood to indicate or imply relatively heavy
The quantity of the property wanted or technical characteristic shown in implicitly indicating.The feature for defining " first ", " second " etc. as a result, can be expressed
Or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ", " second " etc. feature can express or
Person implicitly includes one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple " contain
Justice is two or more.
Conventional radial is synthesized one group of blade by the utility model with axial blade, and is distributed with diffuser impeller disk shape.
Make the axial flow from blower outlet turn to seamlessly transit between radial air flow, is produced between axial direction and radial direction to avoid air-flow
Raw Disengagement zone, effectively improves surge margin, prevents the appearance of engine surge failure.
The utility model is described further below in conjunction with attached drawing.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of diffuser for tiny engine centrifugal compressor, including diffuser wheel disc 1 and expansion
Depressor blade 2 has very high flowing velocity, when gas is flowed out from impeller in order to which this part kinetic energy is adequately changed into heat
Can, to improve pressure, face is provided with diffuser after the impeller, it is the channel being made of front and back partition, with the increase of diameter,
Circulation area also increases as, and gas velocity slows down gradually, and pressure is improved；The diffuser wheel disc 1 is integrally formed, and is used
Fillet smooth transition, there is no air radial direction shaft to energy loss, and have from the edge of diffuser wheel disc 1 to the center point
Arc transition；
Multiple diffuser vanes 2 are evenly arranged on diffuser wheel disc 1 along axial direction, and diffuser vane 2 is one group along diffusion
The blade of 1 distribution of shapes of device wheel disk, diffuser vane 2 and tiny engine front housing, diffuser wheel disc 1 collectively constitute circulation gas
The meridional channel of stream, the direction of circulation airflow becomes radial from axial in meridional channel.The diffuser vane 2 is from narrow to wide
Thin type blade, diffuser vane 2 is wider close to the edge of diffuser wheel disc 1, close to diffuser wheel disc 1 the center point compared with
It is narrow, and the intersection of 2 root of diffuser vane and diffuser wheel disc 1 is manufactured using five-axis NC machine center finish-milling technique, it will
Blade need to be finished and be reduced to one group by two groups of script, procedure of processing is effectively simplified.
The edge of the diffuser wheel disc 1 is provided with the radial fixing device 3 for being connected with engine housing,
The axial securing means for impeller 4 for being connected with fore bearing, radial fixing device are provided at the central circular of the diffuser wheel disc 1
3 and axial securing means for impeller 4 be arranged circumferentially along diffuser wheel disc 1, according to the difference of engine, requirement can be changed.
Diffuser wheel disc 1 is designed due to using arc transition, and such air-flow is after being in contact with it, the circulation area of air-flow
Variation is smaller, will not generate gas caused by traditional diffuser and flow through acceleration and circulation obstruction, will not generate produced by edge
Angle whirlpool, especially across sound wave or ultrasonic wave flowing in, can avoid well due to this reason caused by high pressure gas damage
It loses, improves efficiency.
The diffuser is completed the process using five shafts numerical controlled machine, and the diffuser vane 2 that need to be finished is also by two kinds of traditional leaves
Piece is reduced to one kind, reduces procedure of processing.
The utility model, which is used, synthesizes one group of blade for radial and axial blade, and diffuser wheel disc is designed to band
Cambered wheel disc, high pressure draught generate Disengagement zone elimination between axial direction and radial direction, effectively improve surge margin, prevent from starting
The appearance of machine surge fault.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the utility model is not limited to
Above embodiment can also not depart from the utility model within the knowledge of a person skilled in the art
It is made a variety of changes under the premise of objective.
Many other changes and modifications may be made without departing from the spirit and scope of the utility model.It should be appreciated that this reality
It is not limited to specific embodiment with novel, the scope of the utility model is defined by the following claims.
Claims (5)
1. a kind of diffuser for tiny engine centrifugal compressor, including diffuser wheel disc (1) and diffuser vane (2),
It is characterized by: the diffuser wheel disc (1) is integrally formed, seamlessly transitted using fillet, and from the edge of diffuser wheel disc (1)
Place has arc transition to the center point；Multiple diffuser vanes (2) are evenly arranged on diffuser wheel disc (1) along axial direction, in institute
The edge for stating diffuser wheel disc (1) is provided with radial fixing device (3) for being connected with engine housing, in the diffusion
The axial securing means for impeller (4) for being connected with fore bearing is provided at the central circular of device wheel disk (1).
2. the diffuser according to claim 1 for tiny engine centrifugal compressor, it is characterised in that: the diffusion
Device blade (2) is one group of blade along diffuser wheel disc distribution of shapes, and diffuser vane (2) and tiny engine front housing expand
Depressor wheel disc (1) collectively constitutes the meridional channel of circulation airflow.
3. the diffuser according to claim 2 for tiny engine centrifugal compressor, it is characterised in that: the meridian
The direction of circulation airflow is radial in runner.
4. the diffuser according to claim 1 for tiny engine centrifugal compressor, it is characterised in that: the diffusion
The intersection of device blade (2) root and diffuser wheel disc (1) is manufactured using five-axis NC machine center finish-milling technique.
5. the diffuser according to claim 1 for tiny engine centrifugal compressor, it is characterised in that: the radial direction
Fixed device (3) and axial securing means for impeller (4) are arranged circumferentially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821092908.XU CN208578777U (en) | 2018-07-11 | 2018-07-11 | A kind of diffuser for tiny engine centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821092908.XU CN208578777U (en) | 2018-07-11 | 2018-07-11 | A kind of diffuser for tiny engine centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208578777U true CN208578777U (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821092908.XU Active CN208578777U (en) | 2018-07-11 | 2018-07-11 | A kind of diffuser for tiny engine centrifugal compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046535A (en) * | 2021-11-09 | 2022-02-15 | 南京航空航天大学 | Adjustable blowing attached diffuser |
-
2018
- 2018-07-11 CN CN201821092908.XU patent/CN208578777U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046535A (en) * | 2021-11-09 | 2022-02-15 | 南京航空航天大学 | Adjustable blowing attached diffuser |
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