CN203430852U - Variable chamfer structure for semi-open impeller - Google Patents
Variable chamfer structure for semi-open impeller Download PDFInfo
- Publication number
- CN203430852U CN203430852U CN201320472788.7U CN201320472788U CN203430852U CN 203430852 U CN203430852 U CN 203430852U CN 201320472788 U CN201320472788 U CN 201320472788U CN 203430852 U CN203430852 U CN 203430852U
- Authority
- CN
- China
- Prior art keywords
- chamfering
- wheel disc
- radius
- blades
- variable
- 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
- 230000007704 transition Effects 0.000 claims description 6
- 230000002860 competitive effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a variable chamfer structure for a semi-open impeller. The variable chamfer structure comprises a wheel disc and a blade group, wherein the center of the wheel disc is provided with a center through hole, and the blade group is arranged at the front side of the wheel disc. The variable chamfer structure is characterized in that the blade group comprises a plurality of large blades and a plurality of small blades, chambers are respectively arranged at the root parts of the large blades and the small blades, and the chambers are changed in the flow line direction of the large blades and the small blades according to a variation rule that the flow line direction length of the large blades or the small blades is L, one end, near the center through hole, of the large blades and the small blades is a starting point, the other end is a terminal end, the chamber radius from the starting point to the 0.7L part is R, the chamber radius from the 0.8L to the terminal point part is 1.5R, and the chamber radius between the 0.7L to the 0.8L is uniformly transited from R to 1.5R. The variable chamfer structure has the advantages that the structure is simple, the intensity is high, the maximum equivalent stress can be reduced by more than 10 percent under the condition of the identical stress loading, the radius of the blade root chambers is changed along with the flow line position change, the radius is only increased in positions with greater stress, the radius in positions with small stress maintains unchanged, and the stress concentration at the blade root parts is reduced through such chambers.
Description
Technical field
The utility model relates to a kind of variable chamfering structure of half-opened impeller, belongs to mechanical structure technical field.
Background technique
In prior art, high-speed centrifugal fan or compressor adopt half-opened impeller more, and this impeller consists of blade and wheel disc.Blade and wheel disc are one-body molded, can cast or milling is made by essence.The root of blade and wheel disc jointing place are all with chamfering conventionally, to strengthen structural strength.
Stressed from impeller, it is mainly rotated produced centrifugal forces affect, from power, distributes, and has two regions of high stress, one in the central through bore of impeller, another is at blade root fillet.Therefore blade root chamfering is for the structural strength of impeller with there is crucial effect working life.When the impeller pressure ratio of large flow surpasses 3, need very high rotating speed.And square being directly proportional of centrifugal force and rotating speed also just means the stressed sharply soaring of impeller, harsher to the requirement of structure.In order to reduce the stress of blade root chamfering, conventionally all can increase the chamfer radius of blade root.And in prior art, the radius of blade root chamfering is normally fixed.Thereby the gas flow area on whole streamline all can reduce, and can produce larger impact to aeroperformance.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of variable chamfering structure of half-opened impeller is provided, and this structural-load-carrying capacity is strong, and long service life can effectively meet the performance requirement of big-flow high-pressure ratio, and cost of production is low.
The technological scheme providing according to the utility model, a kind of variable chamfering structure of half-opened impeller, comprise that center is provided with the wheel disc and the vane group that is arranged on wheel disc front of central through bore, feature is: described vane group comprises a plurality of large blades and a plurality of small leaf, at the root of large blade and small leaf, chamfering is set; Described chamfering changes along the grain direction of large blade and small leaf, rule change is: the grain direction length of large blade or small leaf is L, large blade and small leaf are starting point near one end of central through bore, the other end is last point, chamfer radius from starting point to 0.7L is R, from 0.8L to the chamfer radius of last point, be 1.5R, the chamfer radius between 0.7L to 0.8L by R to 1.5R even transition.
Described large blade and small leaf respectively Yi Lun disk center are centrosymmetric and are uniformly distributed, and large blade and small leaf successively interval arrange.
Middle part, the back side at described wheel disc arranges boss, and boss surface middle part is provided with connecting structure.
The outer surface of described connecting structure is polygonal.
Described boss and joint, the wheel disc back side adopt chamfering transition.
Described vane group and wheel disc are one-body molded.
Compared with the prior art the utility model has the following advantages: the utility model is simple in structure, and intensity is high, and under identical stressed carrying, its maximum equivalent can decline more than 10%; The radius of blade root chamfering is along with the change in location of streamline, only in the high place of stress, strengthen, the place that stress is little remains unchanged, and it is concentrated that chamfering had both reduced the stress at blade root place like this, significantly reduce again its impact on aeroperformance, taken into account the structure of impeller and pneumatic simultaneously; Compared with the prior art, efficiency is higher, and product competitive ability is also stronger.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with concrete accompanying drawing, the utility model is described in further detail.
As shown in Fig. 1～Fig. 2: as described in the variable chamfering structure of half-opened impeller comprise vane group 1, large blade 1-1, small leaf 1-2, chamfering 1-3, wheel disc 2, boss 2-1, connecting structure 2-2 etc.
As shown in Figure 1 and Figure 2, the utility model comprises that center is provided with the wheel disc 2 and the vane group 1 that is arranged on wheel disc 2 fronts of central through bore 3, at the middle part, the back side of wheel disc 2, boss 2-1 is set, and boss 2-1 and wheel disc 2 joints, the back side adopt the transition of major diameter chamfering; Middle part, described boss 2-1 surface is provided with connecting structure 2-2, and the outer surface of connecting structure 2-2 is polygonal, and connecting structure 2-2 matches with axle, is mainly used in transmitting torque; In use, fastening screw trip bolt passes through the tapped hole of central through bore 3 precession axle heads, thereby carries out axial restraint with axle;
As shown in Figure 1, described vane group 1 comprises 8 large blade 1-1 and 8 small leaf 1-2, is centrosymmetric and is uniformly distributed respectively with wheel disc 2 centers, and large blade 1-1 and small leaf 1-2 successively interval arrange;
Described vane group 1 is one-body molded with wheel disc 2, at the root of large blade 1-1 and small leaf 1-2, chamfering 1-3 is set; Described chamfering 1-3 changes along the grain direction of large blade 1-1 and small leaf 1-2, rule change is: the grain direction length of large blade 1-1 or small leaf 1-2 is L, large blade 1-1 and small leaf 1-2 are starting point near one end of central through bore 3, the other end is last point, chamfering 1-3 radius from starting point to 0.7L is R, from 0.8L to the chamfering 1-3 radius of last point, be 1.5R, the chamfering 1-3 radius between 0.7L to 0.8L by R to 1.5R even transition.
The utility model is simple in structure, structural strength is high, and under identical stressed carrying, its maximum equivalent can decline more than 10%; The radius of blade root chamfering changes along with the position of blade grain direction, only in the high place of stress, strengthens, and the place that stress is little remains unchanged; The stress that chamfering had both reduced blade root place is like this concentrated, and has significantly reduced again its impact on aeroperformance, takes into account the structure of impeller and pneumatic simultaneously; Compared with the prior art, efficiency is higher, and product competitive ability is also stronger.
Claims (6)
1. the variable chamfering structure of a half-opened impeller, comprise that center is provided with the wheel disc of central through bore (3) (2) and is arranged on the positive vane group (1) of wheel disc (2), it is characterized in that: described vane group (1) comprises a plurality of large blades (1-1) and a plurality of small leaf (1-2), at the root of large blade (1-1) and small leaf (1-2), chamfering (1-3) is set; Described chamfering (1-3) changes along the grain direction of large blade (1-1) and small leaf (1-2), rule change is: the grain direction length of large blade (1-1) or small leaf (1-2) is L, large blade (1-1) and small leaf (1-2) are starting point near one end of central through bore (3), the other end is last point, chamfering from starting point to 0.7L (1-3) radius is R, from 0.8L to chamfering (1-3) radius of last point, be 1.5R, the chamfering between 0.7L to 0.8L (1-3) radius by R to 1.5R even transition.
2. the variable chamfering structure of half-opened impeller as claimed in claim 1, it is characterized in that: described large blade (1-1) and small leaf (1-2) are centrosymmetric and are uniformly distributed with wheel disc (2) center respectively, large blade (1-1) and small leaf (1-2) successively interval arrange.
3. the variable chamfering structure of half-opened impeller as claimed in claim 1, is characterized in that: the middle part, the back side at described wheel disc (2) arranges boss (2-1), and middle part, boss (2-1) surface is provided with connecting structure (2-2).
4. the variable chamfering structure of half-opened impeller as claimed in claim 3, is characterized in that: the outer surface of described connecting structure (2-2) is polygonal.
5. the variable chamfering structure of half-opened impeller as claimed in claim 3, is characterized in that: described boss (2-1) adopts chamfering transition with wheel disc (2) joint, the back side.
6. the variable chamfering structure of half-opened impeller as claimed in claim 1, is characterized in that: described vane group (1) is one-body molded with wheel disc (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320472788.7U CN203430852U (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure for semi-open impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320472788.7U CN203430852U (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure for semi-open impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203430852U true CN203430852U (en) | 2014-02-12 |
Family
ID=50059895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320472788.7U Expired - Fee Related CN203430852U (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure for semi-open impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203430852U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362867A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Variable chamfer structure of unshrouded impeller |
| CN104110402A (en) * | 2014-07-30 | 2014-10-22 | 无锡杰尔压缩机有限公司 | Semi-open type impeller structure with annular boss |
-
2013
- 2013-08-02 CN CN201320472788.7U patent/CN203430852U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362867A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Variable chamfer structure of unshrouded impeller |
| CN104110402A (en) * | 2014-07-30 | 2014-10-22 | 无锡杰尔压缩机有限公司 | Semi-open type impeller structure with annular boss |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202091251U (en) | Intermediate blade of compressor with hub with diameter of phi 940 | |
| CN201581936U (en) | Special last-stage vane for large-scale 60Hz turbine | |
| CN102168687A (en) | Compressor first-stage blade with hub diameter of phi 762 | |
| CN203430852U (en) | Variable chamfer structure for semi-open impeller | |
| CN103256248A (en) | Impeller and centrifugal compressor comprising same | |
| CN201496290U (en) | Low consumption high efficiency automatable axial flow cooling fan | |
| CN103362867A (en) | Variable chamfer structure of unshrouded impeller | |
| CN203161649U (en) | Variable-installation-angle axial fan | |
| CN201934145U (en) | Low-pressure blade stage group of variable rotating speed industrial steam turbine | |
| CN203130596U (en) | Serial inducer | |
| CN202441647U (en) | Impeller and centrifugal compressor comprising same | |
| CN104314863A (en) | Gas compressor impeller with function of reducing axial load | |
| CN103362864B (en) | The Lightened structure of half-opened impeller | |
| CN104110402A (en) | Semi-open type impeller structure with annular boss | |
| CN204677491U (en) | The half-closed cycloid impeller of auto pump | |
| CN202091249U (en) | Intermediate-stage blade of gas compressor with hub diameter of Phi 564mm | |
| CN202048023U (en) | Primary blade of large-sized high-rotation-speed air compressor | |
| CN202360151U (en) | Low-pressure stage group last stage blade for variable speed air cooling industrial steam turbines | |
| CN203430851U (en) | Wedge-shaped structure of semi-open type impeller | |
| CN202370910U (en) | Normal temperature assembled ultralow temperature run centrifugal compressor | |
| CN202065241U (en) | First-stage blade of air compressor with hub diameter of phi 762 | |
| CN203516179U (en) | Weight reduction structure of semi-open impeller | |
| CN201650858U (en) | Double-impeller rotor | |
| CN205714938U (en) | Multistage turbine vacuum pump impeller | |
| CN202065243U (en) | Air compressor first-stage blade with hub diameter of phi 616 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 214106 No. 38, Qian Lian Road, Xishan Economic Development Zone, Xishan District, Jiangsu, Wuxi Patentee after: GL-TURBO LLC Address before: 214192 Jiangsu Province, Wuxi city Xishan District of Xishan Economic Development Zone in three Furong Road No. 99 building six room 507 zuiun Patentee before: GL-TURBO Compressor, LLC |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |