CN104110402A - Semi-open type impeller structure with annular boss - Google Patents
Semi-open type impeller structure with annular boss Download PDFInfo
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- CN104110402A CN104110402A CN201410371258.2A CN201410371258A CN104110402A CN 104110402 A CN104110402 A CN 104110402A CN 201410371258 A CN201410371258 A CN 201410371258A CN 104110402 A CN104110402 A CN 104110402A
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- impeller
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- impeller plate
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Abstract
The invention relates to a semi-open type impeller structure with an annular boss. The semi-open type impeller structure comprises an impeller disk and a blade unit arranged on the impeller disk, wherein the annular boss project on the outer edge of the back of the impeller disk; the outer diameter of the annular boss is the same as the diameter D of the impeller disk; the height L of the annular boss is 0.02D-0.1D; the height H of the annular boss is 0.5L-L. The semi-open type impeller structure is high in structural strength, and the maximum equivalent stress can be lowered by over 10 percent under the same stress. The annular boss 2-3 is arranged on the back of the impeller disk 2, thereby reducing stress concentration on an impeller root, greatly lowering the influence on the pneumatic performance, and meanwhile considering the structure and pneumatic property of the impeller. On the other hand, a material can be cut off during dynamic balance of the impeller. Since the outer diameter of the annular boss 2-3 is the same as the diameter of the impeller, the weight of the material needing to be cut can be minimized at the same dynamic balance amount.
Description
Technical field
The present invention relates to a kind of blade wheel structure, especially a kind of half-opened impeller structure with annular boss, belongs to the technical field of half-opened impeller.
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.And in prior art, in order to reduce the stress of blade root chamfering, conventionally all can increase the chamfer radius of blade root.And on the other hand, the increase of the radius of blade root chamfering can reduce the gas flow area on whole streamline, on aeroperformance, can produce larger impact.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of half-opened impeller structure with annular boss is provided, this structural-load-carrying capacity is strong, and long service life can effectively meet the performance requirement of big-flow high-pressure ratio.Material cutting region while simultaneously can be used as dynamic balance of impeller, minimizes the required material bite of dynamic balancing.
According to technological scheme provided by the invention, the described half-opened impeller structure with annular boss, comprise the impeller plate and be arranged on the vane group on the described impeller plate, the outer rim at described impeller plate wheel back convexes with annular boss, the external diameter of described annular boss is identical with the diameter D of the impeller plate, the width L of annular boss is 0.02D ~ 0.1D, and the height H of annular boss is 0.5L ~ L.
Described vane group comprises large blade and small leaf; Described large blade and small leaf are all centrosymmetric and are uniformly distributed on the impeller plate with the center of the impeller plate.
Described large blade and small leaf are eight.The wheel back of the described impeller plate includes boss, adopts chamfering transition between described boss and annular boss.
The centre area of described boss is provided with connecting structure, and described connecting structure and the impeller plate coaxially distribute.The outer surface of described connecting structure is polygonal.The centre area of the described impeller plate arranges central through bore.
Compared with the prior art the present invention has the following advantages:
The present invention is simple in structure, and structural strength is high, and under identical stressed carrying, its maximum equivalent can decline more than 10%.The wheel back of the impeller plate 2 arranges annular boss 2-3, and the stress that has both reduced blade root place is concentrated, and has significantly reduced again its impact on aeroperformance, takes into account the structure of impeller and pneumatic simultaneously.On the other hand, impeller, when doing dynamic balancing, can excise material herein, because external diameter and the impeller diameter of annular boss 2-3 is equal to.For identical unbalancing value, the material weight of required excision can reach and minimize.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 invention.
Fig. 2 is the A-A view of Fig. 1.
Description of reference numerals: 1-vane group, the large blade of 1-1-, 1-2-small leaf, 2-wheel disc, 2-1-boss, 2-2-connecting structure, 2-3-annular boss and 2-4-central through bore.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As depicted in figs. 1 and 2: in order effectively to meet the performance requirement of big-flow high-pressure ratio.Material cutting region while simultaneously can be used as dynamic balance of impeller, minimize the required material bite of dynamic balancing, the present invention includes the impeller plate 2 and be arranged on the vane group 1 on the described impeller plate 2, the outer rim that the described impeller plate 2 is taken turns back convexes with annular boss 2-3, the external diameter of described annular boss 2-2 is identical with the diameter D of the impeller plate 2, the width L of annular boss 2-3 is 0.02D ~ 0.1D, and the height H of annular boss 2-3 is 0.5L ~ L.
Particularly, annular boss 2-3 is in the outer rim at the wheel back of the impeller plate 2, it is the edge that the edge of annular boss 2-3 is the impeller plate 2, annular boss 2-3 and the impeller plate 2 coaxially distribute, the external diameter of annular boss 2-3 is identical with the diameter of whole impeller, both the stress that had reduced blade root place by annular boss 2-3 is concentrated, and has significantly reduced again its impact on aeroperformance, takes into account the structure of impeller and pneumatic simultaneously.
Further, described vane group 1 comprises large blade 1-1 and small leaf 1-2; Described large blade 1-1 and small leaf 1-2 are all centrosymmetric and are uniformly distributed on the impeller plate 2 with the center of the impeller plate 2.Described large blade 1-1 and small leaf 1-2 are eight.Large blade 1-1 and small leaf 1-2 are spaced apart successively.
The wheel back of the described impeller plate 2 includes boss 2-1, between described boss 2-1 and annular boss 2-3, adopts chamfering transition.The centre area of described boss 2-1 is provided with connecting structure 2-2, and described connecting structure 2-2 and the impeller plate 2 coaxially distribute.The outer surface of described connecting structure 2-2 is polygonal.In the embodiment of the present invention, by connecting structure 2-2, match with axle, be mainly used in transmitting torque.
The centre area of the described impeller plate 2 arranges central through bore 2-4.Described central through bore 2-4 connects the impeller plate 2, and central through bore 2-4 connects connecting structure 2-2, and fastening screw trip bolt screws the tapped hole of axle head by central through bore 2-4, thereby carries out axial fixing with axle.
Compared with the prior art the present invention has the following advantages:
The present invention is simple in structure, and structural strength is high, and under identical stressed carrying, its maximum equivalent can decline more than 10%.The wheel back of the impeller plate 2 arranges annular boss 2-3, and the stress that has both reduced blade root place is concentrated, and has significantly reduced again its impact on aeroperformance, takes into account the structure of impeller and pneumatic simultaneously.On the other hand, impeller, when doing dynamic balancing, can excise material herein, because external diameter and the impeller diameter of annular boss 2-3 is equal to.For identical unbalancing value, the material weight of required excision can reach and minimize.Compared with the prior art, efficiency is higher, and product competitive ability is also stronger.
Claims (7)
1. the half-opened impeller structure with annular boss, comprise the impeller plate (2) and be arranged on the vane group (1) on the described impeller plate (2), it is characterized in that: the outer rim at the described impeller plate (2) wheel back convexes with annular boss (2-3), the external diameter of described annular boss (2-2) is identical with the diameter D of the impeller plate (2), the width L of annular boss (2-3) is 0.02D ~ 0.1D, and the height H of annular boss (2-3) is 0.5L ~ L.
2. the half-opened impeller structure with annular boss according to claim 1, is characterized in that: described vane group (1) comprises large blade (1-1) and small leaf (1-2); Described large blade (1-1) and small leaf (1-2) are all centrosymmetric and are uniformly distributed on the impeller plate (2) with the center of the impeller plate (2).
3. the half-opened impeller structure with annular boss according to claim 2, is characterized in that: described large blade (1-1) and small leaf (1-2) are eight.
4. the half-opened impeller structure with annular boss according to claim 1, is characterized in that: the wheel back of the described impeller plate (2) includes boss (2-1), between described boss (2-1) and annular boss (2-3), adopts chamfering transition.
5. the half-opened impeller structure with annular boss according to claim 4, is characterized in that: the centre area of described boss (2-1) is provided with connecting structure (2-2), and described connecting structure (2-2) coaxially distributes with the impeller plate (2).
6. the half-opened impeller structure with annular boss according to claim 5, is characterized in that: the outer surface of described connecting structure (2-2) is polygonal.
7. the half-opened impeller structure with annular boss according to claim 1, is characterized in that: the centre area of the described impeller plate (2) arranges central through bore (2-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371258.2A CN104110402A (en) | 2014-07-30 | 2014-07-30 | Semi-open type impeller structure with annular boss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371258.2A CN104110402A (en) | 2014-07-30 | 2014-07-30 | Semi-open type impeller structure with annular boss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104110402A true CN104110402A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410371258.2A Pending CN104110402A (en) | 2014-07-30 | 2014-07-30 | Semi-open type impeller structure with annular boss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640750A (en) * | 2016-09-26 | 2017-05-10 | 北京航空航天大学 | High-speed centrifugal compressor impeller rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080669A (en) * | 2010-09-16 | 2011-06-01 | 苏州顶裕节能设备有限公司 | Fan impeller |
| CN202001331U (en) * | 2011-04-15 | 2011-10-05 | 博世电动工具（中国）有限公司 | Fan used by electric tool and electric tool |
| JP5100711B2 (en) * | 2009-06-04 | 2012-12-19 | 三菱電機株式会社 | Turbo fan |
| 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 |
| CN204299944U (en) * | 2014-07-30 | 2015-04-29 | 无锡杰尔压缩机有限公司 | A kind of half-opened impeller structure with annular boss |
-
2014
- 2014-07-30 CN CN201410371258.2A patent/CN104110402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5100711B2 (en) * | 2009-06-04 | 2012-12-19 | 三菱電機株式会社 | Turbo fan |
| CN102080669A (en) * | 2010-09-16 | 2011-06-01 | 苏州顶裕节能设备有限公司 | Fan impeller |
| CN202001331U (en) * | 2011-04-15 | 2011-10-05 | 博世电动工具（中国）有限公司 | Fan used by electric tool and electric tool |
| 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 |
| CN204299944U (en) * | 2014-07-30 | 2015-04-29 | 无锡杰尔压缩机有限公司 | A kind of half-opened impeller structure with annular boss |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640750A (en) * | 2016-09-26 | 2017-05-10 | 北京航空航天大学 | High-speed centrifugal compressor impeller rotor |
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Application publication date: 20141022 |
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| RJ01 | Rejection of invention patent application after publication |