CN103362867A - Variable chamfer structure of unshrouded impeller - Google Patents
Variable chamfer structure of unshrouded impeller Download PDFInfo
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- CN103362867A CN103362867A CN2013103344980A CN201310334498A CN103362867A CN 103362867 A CN103362867 A CN 103362867A CN 2013103344980 A CN2013103344980 A CN 2013103344980A CN 201310334498 A CN201310334498 A CN 201310334498A CN 103362867 A CN103362867 A CN 103362867A
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Abstract
The invention relates to a variable chamfer structure of an unshrouded impeller. The variable chamfer structure of the unshrouded impeller comprises a wheel disc with a central through hole and a blade set arranged on the front face of the wheel disc. The variable chamfer structure of the unshrouded impeller is characterized in that the blade set comprises a plurality of big blades and a plurality of small blades, chamfers are arranged on the root portions of the big blades and the root portions of the small blades, the chamfers change in the streamline directions of the big blades and the streamline directions of the small blades, and the changing rule is that the length of the big blades in the streamline directions and the length of the small blades in the streamline directions are L, one ends, close to the central through hole, of the big blades and of the small blades are regarded as starting points, and the other ends of the big blades and the other ends of the small blades are regarded as tail points, the chamfer radius from the starting points to 0.7L positions is R, the chamfer radius from 0.8L positions to the tail points is 1.5R, and the chamfer radiuses between the 0.7L positions and the 0.8L positions are in even transition from the R to the 1.5R. The variable chamfer structure of the unshrouded impeller is simple in structure and high in strength, and the maximum equivalent stress of the variable chamfer structure of the unshrouded impeller can be reduced by more than 10% under identical stress bearing. The radiuses of the chamfers of blade roots change along with the positions of streamlines, are enlarged only in the positions with high stress, and remain unchanged in the positions with low stress, and therefore stress concentration on the root portions of the blades is reduced.
Description
Technical field
The present invention relates to a kind of variable chamfering structure of half-opened impeller, belong to the mechanical structure technical field.
Background technique
In prior art, high-speed centrifugal fan or compressor adopt half-opened impeller more, and this impeller is made of blade and wheel disc.Blade and wheel disc are one-body molded, can or mill to make by the essence casting.The root of blade and wheel disc jointing place all are with chamfering usually, to strengthen structural strength.
Stressed from impeller, it is mainly rotated the centrifugal forces affect that produces, and distributes from power, and two regions of high stress are arranged, one in the central through bore of impeller, another is at blade root fillet.Therefore the blade root chamfering is for the structural strength of impeller with crucial effect is arranged 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, and be harsher to the requirement of structure.In order to reduce the stress of blade root chamfering, usually all can increase the chamfer radius of blade root.And in the existing technology, the radius of blade root chamfering is normally fixed.Thereby the gas flow area on the whole streamline all can reduce, and can produce larger impact to aeroperformance.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of variable chamfering structure of half-opened impeller is provided, this structural-load-carrying capacity is strong, long service life, but the performance requirement of to satisfy effectively big-flow high-pressure ratio, and cost of production is low.
According to technological scheme provided by the invention, a kind of variable chamfering structure of half-opened impeller, comprise that the center is provided with the wheel disc and the vane group that is arranged on the 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 an end of central through bore, the other end is last point, chamfer radius from starting point to 0.7L is R, be 1.5R from 0.8L to the chamfer radius of last point, the chamfer radius between the 0.7L to 0.8L by R to the 1.5R even transition.
Described large blade and small leaf are centrosymmetric with wheel disk center respectively and evenly distribute, and large blade and small leaf successively interval arrange.
Middle part, the back side at described wheel disc arranges boss, and the boss surface middle part is provided with connecting structure.
The outer surface of described connecting structure is polygonal.
The chamfering transition is adopted in described boss and joint, the wheel disc back side.
Described vane group and wheel disc are one-body molded.
Compared with the prior art the present invention has the following advantages: the present invention is simple in structure, and intensity is high, and under identical stressed carrying, its maximum equivalent can descend more than 10%; The radius of blade root chamfering is along with the change in location of streamline, only strengthen in the high place of stress, 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 simultaneously the structure of impeller and pneumatic; Compared with the prior art, efficient is higher, and product competitive ability is also stronger.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
The invention will be further described below in conjunction with concrete accompanying drawing.
Such as Fig. 1～shown in Figure 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 center of the present invention includes is provided with the wheel disc 2 of central through bore 3 and is arranged on the vane group 1 in wheel disc 2 fronts, at the middle part, the back side of wheel disc 2 boss 2-1 is set, and the transition of major diameter chamfering is adopted in boss 2-1 and joint, wheel disc 2 back side; 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, and being centrosymmetric with wheel disc 2 centers respectively evenly distributes, 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 an end of central through bore 3, the other end is last point, chamfering 1-3 radius from starting point to 0.7L is R, be 1.5R from 0.8L to the chamfering 1-3 radius of last point, the chamfering 1-3 radius between the 0.7L to 0.8L by R to the 1.5R even transition.
The present invention is simple in structure, structural strength is high, and under identical stressed carrying, its maximum equivalent can descend more than 10%; The radius of blade root chamfering changes along with the position of blade grain direction, only strengthens in the high place of stress, and the place that stress is little remains unchanged; The chamfering stress that both reduced the blade root place is concentrated like this, has significantly reduced again its impact on aeroperformance, takes into account simultaneously the structure of impeller and pneumatic; Compared with the prior art, efficient is higher, and product competitive ability is also stronger.
Claims (6)
1. the variable chamfering structure of a half-opened impeller, comprise that the 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 an end of central through bore (3), the other end is last point, chamfering from starting point to 0.7L (1-3) radius is R, be 1.5R from 0.8L to chamfering (1-3) radius of last point, the chamfering between the 0.7L to 0.8L (1-3) radius by R to the 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 with wheel disc (2) center respectively and evenly distribute, and 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: boss (2-1) is set in the middle part of the back side of described wheel disc (2), is provided with connecting structure (2-2) in the middle part of boss (2-1) is surperficial.
4. the variable chamfering structure of half-opened impeller as claimed in claim 3, it 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) and the transition of wheel disc (2) joint, back side employing chamfering.
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 |
|---|---|---|---|
| CN2013103344980A CN103362867A (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure of unshrouded impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103344980A CN103362867A (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure of unshrouded impeller |
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| Publication Number | Publication Date |
|---|---|
| CN103362867A true CN103362867A (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103344980A Pending CN103362867A (en) | 2013-08-02 | 2013-08-02 | Variable chamfer structure of unshrouded impeller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373377A (en) * | 2014-10-30 | 2015-02-25 | 中国北车集团大连机车研究所有限公司 | High-pressure-ratio gas compressor impeller of supercharger for internal combustion engine |
| CN110905850A (en) * | 2019-10-28 | 2020-03-24 | 天津怡和嘉业医疗科技有限公司 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
| CN112049818A (en) * | 2019-06-06 | 2020-12-08 | 中国航发商用航空发动机有限责任公司 | Compressor and compressor blade |
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| JPH11270491A (en) * | 1998-03-20 | 1999-10-05 | Ishikawajima Harima Heavy Ind Co Ltd | Disc structure of impeller of centrifugal compressor |
| JP2002349484A (en) * | 2001-05-28 | 2002-12-04 | Mitsubishi Heavy Ind Ltd | Compressor |
| CN2736567Y (en) * | 2004-10-20 | 2005-10-26 | 徐光伦 | Axial flow fan impeller with low noise and large wind rate |
| US20060045748A1 (en) * | 2004-08-30 | 2006-03-02 | Cahoon Christopher L | Weld shielding device for automated welding of impellers and blisks |
| CN1908445A (en) * | 2005-08-03 | 2007-02-07 | 三菱重工业株式会社 | Propeller fan for heat exchanger of in-vehicle air conditioner |
| US20070039709A1 (en) * | 2005-08-19 | 2007-02-22 | Aikoku Alpha Corporation | Manufacturing method of titanium compressor wheel |
| DE102007055616A1 (en) * | 2007-11-20 | 2009-05-28 | Mann + Hummel Gmbh | Compressor wheel for e.g. turbocharger, of motor vehicle, has mold parting line between upstream wheel part and downstream wheel part, lying perpendicular to rotation axis, and running through part of compressor blade |
| CN101893003A (en) * | 2010-05-31 | 2010-11-24 | 宋波 | 3-D impeller of high-load centrifugal compressor |
| CN102797703A (en) * | 2012-09-10 | 2012-11-28 | 三一能源重工有限公司 | Impeller of compressor |
| CN103032373A (en) * | 2013-01-10 | 2013-04-10 | 无锡杰尔压缩机有限公司 | Polygonal connection structure of impeller and gear shaft |
| CN203430852U (en) * | 2013-08-02 | 2014-02-12 | 无锡杰尔压缩机有限公司 | Variable chamfer structure for semi-open impeller |
-
2013
- 2013-08-02 CN CN2013103344980A patent/CN103362867A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11270491A (en) * | 1998-03-20 | 1999-10-05 | Ishikawajima Harima Heavy Ind Co Ltd | Disc structure of impeller of centrifugal compressor |
| JP2002349484A (en) * | 2001-05-28 | 2002-12-04 | Mitsubishi Heavy Ind Ltd | Compressor |
| US20060045748A1 (en) * | 2004-08-30 | 2006-03-02 | Cahoon Christopher L | Weld shielding device for automated welding of impellers and blisks |
| CN2736567Y (en) * | 2004-10-20 | 2005-10-26 | 徐光伦 | Axial flow fan impeller with low noise and large wind rate |
| CN1908445A (en) * | 2005-08-03 | 2007-02-07 | 三菱重工业株式会社 | Propeller fan for heat exchanger of in-vehicle air conditioner |
| US20070039709A1 (en) * | 2005-08-19 | 2007-02-22 | Aikoku Alpha Corporation | Manufacturing method of titanium compressor wheel |
| DE102007055616A1 (en) * | 2007-11-20 | 2009-05-28 | Mann + Hummel Gmbh | Compressor wheel for e.g. turbocharger, of motor vehicle, has mold parting line between upstream wheel part and downstream wheel part, lying perpendicular to rotation axis, and running through part of compressor blade |
| CN101893003A (en) * | 2010-05-31 | 2010-11-24 | 宋波 | 3-D impeller of high-load centrifugal compressor |
| CN102797703A (en) * | 2012-09-10 | 2012-11-28 | 三一能源重工有限公司 | Impeller of compressor |
| CN103032373A (en) * | 2013-01-10 | 2013-04-10 | 无锡杰尔压缩机有限公司 | Polygonal connection structure of impeller and gear shaft |
| CN203430852U (en) * | 2013-08-02 | 2014-02-12 | 无锡杰尔压缩机有限公司 | Variable chamfer structure for semi-open impeller |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373377A (en) * | 2014-10-30 | 2015-02-25 | 中国北车集团大连机车研究所有限公司 | High-pressure-ratio gas compressor impeller of supercharger for internal combustion engine |
| CN112049818A (en) * | 2019-06-06 | 2020-12-08 | 中国航发商用航空发动机有限责任公司 | Compressor and compressor blade |
| CN112049818B (en) * | 2019-06-06 | 2022-04-26 | 中国航发商用航空发动机有限责任公司 | Compressor and compressor blade |
| CN110905850A (en) * | 2019-10-28 | 2020-03-24 | 天津怡和嘉业医疗科技有限公司 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
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Application publication date: 20131023 |