CN205592194U - Novel radial diffuser subassembly - Google Patents
Novel radial diffuser subassembly Download PDFInfo
- Publication number
- CN205592194U CN205592194U CN201620368774.4U CN201620368774U CN205592194U CN 205592194 U CN205592194 U CN 205592194U CN 201620368774 U CN201620368774 U CN 201620368774U CN 205592194 U CN205592194 U CN 205592194U
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- China
- Prior art keywords
- blade
- diffuser
- root
- fillet
- radius
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
The utility model relates to a novel radial diffuser, this novel radial diffuser include integrated into one piece's diffuser rim plate, a plurality of along the diffuser blade of circumference equipartitions on the diffuser rim plate, the diffuser root of blade adopts the fillet slick and sly excessive with the juncture of diffuser rim plate, the fillet radius R of root of blade is 4mm, the blade leading edge and the fillet radius R of trailing edge are 1/10th of root of blade fillet radius to make smooth transition between blade root fillet and the corner fillet, produce the disengagement zone in order to avoid the air current at the trailing edge, effectively improve surge margin, prevent the appearance of engine surge trouble.
Description
Technical field
This utility model relates to aero engine technology field, a kind of novel radial diffuser.
Background technology
Radial diffuser is as the critical component of gas-turbine unit, and its quality directly affects its engine performance and mechanical efficiency, and therefore its process technology is always an important topic of manufacturing.Typically requiring that diffuser obtains optimum performance at design point, the kinetic energy by impeller outlet gas that can be maximum is converted into static energy, and gas making flow separation will not occur.But when centrifugal compressor flow reaches a field planting with design load deviation, the suction surface boundary-layer of diffuser vane can separate, diffuser pitot loss is caused to increase rapidly, cause stall even surge, compressor surge phenomenon can cause intense mechanical vibration and the hot junction overtemperature of electromotor, and in very short time, cause the badly damaged of electromotor, the most do not allow compressor to enter surge area work under any duty.
Main manufacturing process at this type of part of China is by cast blank molding at present, then finished product it has been machined out, the subject matter of this method is, owing to blade-section cannot be carried out machining, therefore blade shape and runner are unable to reach higher precision, and total quality cannot meet the use requirement of gas-turbine unit.Owing to former radial diffuser root of blade fillet is less, the air-flow of blade blade back is easily generated separation, and after forming Disengagement zone, flow limitation is in electromotor throat area, charge flow rate diminishes, the compressor blade angle of attack increases, compressor blade row loses diffusion ability, air-flow flows backwards, thus forms surge phenomenon.
Utility model content
Technical problem to be solved in the utility model is to provide one and avoids surge, high efficiency novel radial diffuser.
In order to solve the problems referred to above, this utility model provides a kind of novel radial diffuser, described novel radial diffuser includes integrated diffuser wheel disc, multiple diffuser vanes being evenly distributed on diffuser wheel disc, described diffuser vane root and the intersection of diffuser wheel disc use fillet round and smooth excessively, radius of corner R of described root of blade is 4mm, described blade and blade basin, blade back and blade front and rear edge rounding off, described blade front and rear edge radius R is 1/10th of root of blade radius of corner, so that seamlessly transitting between blade root fillet and corner fillet, to avoid air-flow to produce Disengagement zone at trailing edge, it is effectively improved surge margin, prevent the appearance of engine surge fault.
Further, described radial diffuser uses finish-milling moulding process to manufacture, and the root of blade, the blade rotating angle precision that obtain are higher so that smooth excessiveness between described blade root fillet and corner fillet.
The processing method of a kind of above-mentioned novel radial diffuser, comprises the steps:
A, choose suitable sheet material and carry out cutting stock, the rough turn semi-finished product obtaining there is blade profile.
B, employing Five-axis NC Machining Center roughing blade, and carry out destressing Ageing Treatment.
C, finish turning, use Five-axis NC Machining Center polish blade, processes high accuracy diffuser vane on diffuser wheel disc.
D, intersection for diffuser vane root and diffuser wheel disc use five-axis NC machine center finish-milling, it is thus achieved that high-precision blade root fillet.
The technique effect of utility model: (1) novel radial diffuser of the present utility model, relative to prior art, diffuser vane root and the intersection of diffuser wheel disc use fillet round and smooth excessively, radius of corner R of root of blade is 4mm, blade inlet edge and the blade rotating angle rounding off of trailing edge intersection, blade front and rear edge radius R is 1/10th of root of blade radius of corner, so that seamlessly transitting between blade root fillet and corner fillet, to avoid air-flow to produce Disengagement zone at trailing edge, it is effectively improved surge margin；(2) use finish-milling processing technique obtain root of blade radius of corner R be 4mm, blade front and rear edge radius R be root of blade radius of corner 1/10th machining accuracy, it is ensured that seamlessly transit between blade root fillet and front and rear edge.
Accompanying drawing explanation
Below in conjunction with Figure of description, this utility model is described in further detail:
Fig. 1 is the perspective view of novel radial diffuser of the present utility model；
Fig. 2 is the top view of figure；
Fig. 3 is the top view of the diffuser vane of prior art；
Fig. 4 is the top view of diffuser vane of the present utility model.
In figure: diffuser wheel disc 1, diffuser vane 2, root of blade 3, blade blade back 21, blade and blade basin 22, blade front and rear edge 23.
Detailed description of the invention
The radial diffuser of embodiment 1 prior art,
As shown in Figure 3, diffuser vane blade back 1 uses continuous circular curve to represent with the distribution of blade and blade basin 2, such as blade blade back use circular arc be radius be 430mm, blade and blade basin use circular arc be radius be 272mm, the circular arc using radius to be 0.4mm at blade front and rear edge seamlessly transits, and blade root radius of corner is 1.2mm；The radial diffuser of the present embodiment, as Figure 1-Figure 2, the diffuser wheel disc manufactured including one finish-milling machine-shaping, multiple diffuser vane it is evenly distributed on wheel disc, as shown in Figure 4, blade blade back use circular arc be radius be 501mm, blade and blade basin use circular arc be radius be 305mm, maximum blade thickness is 2.5mm, diffuser vane root and the intersection of diffuser wheel disc use fillet round and smooth excessively, radius of corner R of root of blade is 4mm, and blade front and rear edge radius R is 1/10th of root of blade radius of corner.This radial diffuser have employed the blade profile more meeting fluid motion characteristics, and the region easily producing air-flow separation is increased blade root fillet, comprehensive two improvement, the traffic requirement that can meet this radial diffuser can suppress again air-flow to separate, it is effectively improved surge margin, prevents engine surge fault from occurring.
The manufacture method of above-mentioned novel radial diffuser, comprises the steps:
A, choose suitable sheet material and carry out cutting stock, the rough turn semi-finished product obtaining there is blade profile.
B, employing Five-axis NC Machining Center roughing blade, and carry out destressing Ageing Treatment.
C, finish turning, use Five-axis NC Machining Center polish blade, processes high accuracy diffuser vane on diffuser wheel disc.
D, intersection for diffuser vane root and diffuser wheel disc use five-axis NC machine center finish-milling, it is thus achieved that high-precision blade root fillet.
Obviously, above-described embodiment is only for clearly demonstrating this utility model example, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And these belong to obvious change or variation that spirit of the present utility model extended out still in protection domain of the present utility model among.
Claims (2)
1. a novel radial diffuser assembly, it is characterized in that, including: integrated diffuser wheel disc (1), multiple diffuser vane (2) being evenly distributed on diffuser wheel disc (1), described diffuser vane root (3) and the intersection of diffuser wheel disc (1) use fillet round and smooth excessively, radius of corner R of described root of blade (3) is 4mm, described blade and blade basin (22), blade back (21) and blade front and rear edge (23) rounding off, radius R is root of blade (3) radius of corner 1/10th of described blade front and rear edge (23).
Novel radial direction diffusion assembly the most according to claim 1, it is characterised in that described radial diffuser uses finish-milling moulding process to manufacture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620368774.4U CN205592194U (en) | 2016-04-27 | 2016-04-27 | Novel radial diffuser subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620368774.4U CN205592194U (en) | 2016-04-27 | 2016-04-27 | Novel radial diffuser subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205592194U true CN205592194U (en) | 2016-09-21 |
Family
ID=56932331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620368774.4U Expired - Fee Related CN205592194U (en) | 2016-04-27 | 2016-04-27 | Novel radial diffuser subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205592194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313982A (en) * | 2016-04-27 | 2017-11-03 | 中国航发常州兰翔机械有限责任公司 | A kind of new radial diffuser component and its manufacture method |
-
2016
- 2016-04-27 CN CN201620368774.4U patent/CN205592194U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313982A (en) * | 2016-04-27 | 2017-11-03 | 中国航发常州兰翔机械有限责任公司 | A kind of new radial diffuser component and its manufacture method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160921 |