CN105545806A - Three-dimensional flow centrifugal fan impeller blade structure - Google Patents
Three-dimensional flow centrifugal fan impeller blade structure Download PDFInfo
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- CN105545806A CN105545806A CN201610103990.0A CN201610103990A CN105545806A CN 105545806 A CN105545806 A CN 105545806A CN 201610103990 A CN201610103990 A CN 201610103990A CN 105545806 A CN105545806 A CN 105545806A
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- blade
- dimensional flow
- region
- blower fan
- centrifugal blower
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Abstract
The invention discloses a three-dimensional flow centrifugal fan impeller blade structure. A three-dimensional flow centrifugal fan impeller comprises a shaft disc, three-dimensional flow blades, a front disc and a rear disc. The rear disc is arranged on the shaft disc, and the three-dimensional flow blades are connected with the rear disc at the positions of blade roots and connected with the front disc at the positions of blade tops. Each three-dimensional flow blade comprises a blade root region, an inlet region, a blade top region, an outlet region and a blade body region. Each three-dimensional flow blade is of a structure that the three-dimensional flow blade horizontally moves away from the axis or close to the axis, or the structure that the blade root region or the inlet region or the blade top region is cut or the structure that the blade root region or the inlet region or the blade top region extends. When the three-dimensional flow blades are machined, the three-dimensional flow blades can be pressed and formed through an original three-dimensional flow fan impeller blade die, the universality purpose of similar three-dimensional flow centrifugal fan impeller blade machining dies is effectively achieved, material and machining cost for three-dimensional flow fan manufacturing is effectively reduced, the lead time is shortened, and the market competitiveness of three-dimensional flow centrifugal fans is greatly improved.
Description
Technical field
The present invention relates to a kind of fan impeller structure, particularly a kind of short-period modified structure of low cost of three-dimensional flow centrifugal blower fan blade wheel blade.
Background technique
Blower fan is medium with gas, and mechanical energy is passed to gas, improves pressure and the machinery of suction or force feed gas, generally include ventilator, blower and compressor.It, in industries such as electric power, metallurgy, chemical industry, cement, all has application widely, and is one of main power consumption machinery of industrial field.According to working principle and structural type, blower fan is divided into the large class of positive displacement and blade type two, and positive displacement is divided into again rotary type and reciprocating, and blade type is divided into centrifugal, axial flow and mixed-flow.
As everyone knows, conventional centrifugal blower fan blade wheel according to the difference of blade shape be divided into plate shaped, circular arc and hollow machine wing etc. several, it respectively has advantage, plate shaped blade processing manufacture is simple, hollow machine air-foil blade has excellent aerodynamic characteristics, and circular arc vane then falls between in manufacture cost and flow efficiency.However, the blade of these three kinds of structural types all belongs to two-dimentional blade, not exclusively can adapt to the flowing law of gas in draught fan impeller, cause certain energy loss.
In recent years, some domestic experts and scholars propose to adopt three dimendional blade on centrifugal blower, to adapt to the flow characteristic of gas in impeller completely, reduce flow losses, improve complete blower efficiency, and the actual running results shows that impeller flow efficiency and complete blower flow efficiency obtain raising by a relatively large margin.The draught fan impeller of this employing three dimendional blade, is commonly called as three-dimensional flow impeller.
But, compare with the processing cost of routine two dimension fan impeller blade, novel three-dimensional fan impeller blade processing is abnormal difficult, first after pneumatic design completes, need the processing mold adopting numerical control machine tool milled blade, secondly compressing by being placed on pattern tool on press machine after heating in plain plate setting-out, cutting, stove.Only the die material of three dimendional blade takes and processing charges, and blower fan cost can be caused to increase about three one-tenth.Meanwhile, almost the blower fan of each model needs one set of die, and for double suction fan, the left and right sides then respectively needs a set of blade mold.Moreover, if the size of order of certain or certain model blower fan is few, is so just more difficult to amortize die cost, seriously constrains the marketing speed of three-dimensional flow blower fan, limit the market competitiveness of three-dimensional flow blower fan.
According to the difference of blade exit established angle, centrifugal blower fan blade wheel is divided into forward direction, radial direction and backward impeller, based on flow theory, the impeller boosting of Forword vane is high, and efficiency is low, and the impeller boosting of backward inclined blade is low, but efficiency is high, the performance of radial blade impeller is between therebetween.Equally, three-dimensional flow impeller, in order to pursue high flow efficiency, is all designed to backward structure without exception, namely adopts bent angle after larger outlet.Therefore, after the outlet of three-dimensional flow blade, bent angle is one of key factor ensureing complete blower efficiency.
In sum, how to utilize the processing mold of existing three-dimensional flow impeller blade, namely do not design and process new impeller blade mould, can be applied in the manufacturing of new close model three-dimensional flow fan impeller blade, be major issue urgently to be resolved hurrily.
Summary of the invention
For the problem that current three-dimensional flow fan impeller blade Mould Machining manufactures and material cost cost is high, the object of the present invention is to provide a kind of three-dimensional flow centrifugal blower fan blade wheel blade structure, to reduce manufacture cost, shorten the delivery cycle, solve the key issue in the technical development of restricting current three-dimensional flow blower fan.
For achieving the above object, present invention employs following technological scheme:
A kind of three-dimensional flow centrifugal blower fan blade wheel blade structure, three-dimensional flow centrifugal blower fan blade wheel comprises, reel, three-dimensional flow blade, shroud and hub disk, reel is furnished with hub disk, three-dimensional flow blade is connected with reel and hub disk at blade root place, and three-dimensional flow blade is connected with shroud at Ye Dingchu, and three-dimensional flow blade comprises, base region, entry zone, Ye Ding region, exit region and blade region, described three-dimensional flow blade is to away from axis direction translation or to the structure close to axis direction translation.
Described three-dimensional flow blade is cutting base region, entry zone or Ye Ding region, or extension base region, entry zone or Ye Ding region structure.
Described draught fan impeller is single suction air intake structure, or double suction air intake structure.
Describedly be no more than 40% of impeller outlet diameter to the distance away from axis direction translation three-dimensional flow blade, be describedly no more than 30% of impeller outlet diameter to the distance close to axis direction translation three-dimensional flow blade.
The described scope in base region and the cutting of Ye Ding region or extension is no more than 30% of local blade height, and the described scope in entry zone cutting or extension is no more than 30% of blade Meridian Passage length.
Beneficial effect of the present invention is embodied in:
The present invention utilizes original three-dimensional flow centrifugal blower fan blade wheel blade mold, is applied in the manufacturing process of close model impeller, significantly reduces the cost of machining blade mould again, shorten the delivery cycle, improve the market competitiveness of three-dimensional flow centrifugal blower.
Accompanying drawing explanation
Fig. 1 is three-dimensional flow centrifugal blower fan blade wheel 3D solid figure.
Fig. 2 is three-dimensional flow centrifugal blower fan blade wheel blade 3D solid figure.
Fig. 3 is that three-dimensional flow centrifugal blower fan blade wheel blade is to axle center translation meridian figure.
Fig. 4 is that three-dimensional flow centrifugal blower fan blade wheel blade is to the cutting meridian figure after the translation of axle center.
Embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
General technical thinking of the present invention utilizes existing three-dimensional flow centrifugal blower fan blade wheel blade processing mould, by pneumatic Transform Type design, ensure that existing profile of impeller vane is constant, the size of reasonable cutting or extension relevant portion, obtain close model three-dimensional flow fan impeller blade molded line, avoid machining blade mould again, reduce cost of material and processing cost, shorten the process-cycle, efficiently solve the uncurrent technical barrier of close model three-dimensional flow centrifugal blower fan blade wheel blade processing mould.
See Fig. 1, Fig. 2, Fig. 3 and Fig. 4.With Y4-2 × 75No29,580r/min double suction fan be example illustrate, how to utilize its existing three-dimensional flow centrifugal blower fan blade wheel blade processing mould, Transform Type design is Y4-2 × 85No24,980r/min.Described three-dimensional flow fan impeller blade structure is described as follows:
Certain three-dimensional flow impeller of double-suction centrifugal fan comprise reel 1, three-dimensional flow blade 2, shroud 3 and rear (in) dish 4; Three-dimensional flow blade 2 is divided into base region 5, entry zone 6, Ye Ding region 7, exit region 8 and blade region 9; The external boundary of three-dimensional flow blade 2 base region 5 is blade root curve 10, the external boundary of three-dimensional flow blade 2 entry zone 8 is blade inlet edge line 11, the external boundary in three-dimensional flow blade 2 Ye Ding region 7 is blade and blade summit curve 12, the external boundary of blade 2 exit region 8 is blade trailing edge line 13, blade trailing edge line 13 place diameter is impeller outlet diameter parameters, Fig. 3 dotted line represents that outlet diameter is the impeller blade meridian profile of 2900mm, and solid line represents that outlet diameter is the impeller blade meridian profile of 2400mm.
During Transform Type design, the impeller being first 2400mm through Pneumatic Calculation acquisition outlet diameter meets total head requirement, is therefore that the three-dimensional flow centrifugal blower fan blade wheel blade of 2900mm is the impeller of 2400mm to axle center translation acquisition outlet diameter by outlet diameter, as shown in Figure 3; Secondly according to rotating shaft diameter and the restriction of blade axial length and the requirement of through-current capability, by determining that new blade root curve 10 obtains the base region 5 needing cutting, by determining that new blade inlet edge line 11 position obtains the entry zone 6 needing cutting, by determining that new leaf summit curve 12 obtains the Ye Ding region 7 needing cutting.
When new impeller blade manufacturing, use original impeller blade processing mold, suppress the blade of former impeller blade shapes, new impeller blade can be obtained by cutting base region 5, entry zone 6 and Ye Ding region 7 in this example.The method does not need to process new blade mold completely, after only needing to process original blade, can obtain the blade of new model draught fan impeller, shorten the process-cycle yet through simple cutting.In addition, because the important feature affecting three-dimensional flow blades flows performance is bent angle and blade structure after blade exit, the clipping region that this example provides can ensure that the flow efficiency of the aeroperformance of new impeller and original three-dimensional flow impeller is suitable to greatest extent.
Be utilize original three-dimensional flow centrifugal blower fan blade wheel vane type line to close to axis direction translation in this example, reduce plane No., and round about, namely away from axis direction, increase plane No., be also in protection scope of the present invention.In addition, base region 5 in this example, entry zone 6 and Ye Ding region 7 all have employed cutting measure, adopt extension measure too within protection scope of the present invention in these three regions.
Claims (5)
1. a three-dimensional flow centrifugal blower fan blade wheel blade structure, three-dimensional flow centrifugal blower fan blade wheel comprises, reel, three-dimensional flow blade, shroud and hub disk, reel is furnished with hub disk, three-dimensional flow blade is connected with reel and hub disk at blade root place, three-dimensional flow blade is connected with shroud at Ye Dingchu, three-dimensional flow blade comprises, base region, entry zone, Ye Ding region, exit region and blade region, it is characterized in that, described three-dimensional flow blade is to away from axis direction translation or to the structure close to axis direction translation.
2. a kind of three-dimensional flow centrifugal blower fan blade wheel blade structure according to claim 1, is characterized in that: described three-dimensional flow blade is cutting base region, entry zone or Ye Ding region, or extension base region, entry zone or Ye Ding region structure.
3. a kind of three-dimensional flow centrifugal blower fan blade wheel blade structure according to claim 1, is characterized in that: described draught fan impeller is single suction air intake structure, or double suction air intake structure.
4. a kind of three-dimensional flow centrifugal blower fan blade wheel blade structure according to claim 1, it is characterized in that: be describedly no more than 40% of impeller outlet diameter to the distance away from axis direction translation three-dimensional flow blade, be describedly no more than 30% of impeller outlet diameter to the distance close to axis direction translation three-dimensional flow blade.
5. a kind of three-dimensional flow centrifugal blower fan blade wheel blade structure according to claim 2, it is characterized in that: the described scope in base region and the cutting of Ye Ding region or extension is no more than 30% of local blade height, the described scope in entry zone cutting or extension is no more than 30% of blade Meridian Passage length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103990.0A CN105545806A (en) | 2016-02-24 | 2016-02-24 | Three-dimensional flow centrifugal fan impeller blade structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610103990.0A CN105545806A (en) | 2016-02-24 | 2016-02-24 | Three-dimensional flow centrifugal fan impeller blade structure |
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| CN201610103990.0A Pending CN105545806A (en) | 2016-02-24 | 2016-02-24 | Three-dimensional flow centrifugal fan impeller blade structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945533A (en) * | 2016-05-18 | 2016-09-21 | 重庆通用工业(集团)有限责任公司 | Forming method for centrifugal fan blades |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB731526A (en) * | 1951-04-23 | 1955-06-08 | Howden James & Co Ltd | Improvements in or relating to radial flow impellers |
| CN2095954U (en) * | 1990-12-07 | 1992-02-12 | 沈阳鼓风机厂 | Large flow centrifugal impeller |
| EP0692637A1 (en) * | 1994-06-13 | 1996-01-17 | Carrier Corporation | Centrifugal fan inlet orifice and impeller assembly |
| CN202417811U (en) * | 2012-02-17 | 2012-09-05 | 北京可汗之风科技有限公司 | Lengthened type wind driven generator blade |
| CN203488432U (en) * | 2013-10-01 | 2014-03-19 | 湖北双剑鼓风机股份有限公司 | Ternary-flow impeller of high-efficiency compressor |
| CN103899574A (en) * | 2012-12-27 | 2014-07-02 | 南通大通宝富风机有限公司 | Free-form surface three-dimensional flow impeller of vacuum pump |
| CN205446179U (en) * | 2016-02-24 | 2016-08-10 | 西安交通大学 | Three -dimensional flow centrifugal fan impeller blade structure |
-
2016
- 2016-02-24 CN CN201610103990.0A patent/CN105545806A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB731526A (en) * | 1951-04-23 | 1955-06-08 | Howden James & Co Ltd | Improvements in or relating to radial flow impellers |
| CN2095954U (en) * | 1990-12-07 | 1992-02-12 | 沈阳鼓风机厂 | Large flow centrifugal impeller |
| EP0692637A1 (en) * | 1994-06-13 | 1996-01-17 | Carrier Corporation | Centrifugal fan inlet orifice and impeller assembly |
| CN202417811U (en) * | 2012-02-17 | 2012-09-05 | 北京可汗之风科技有限公司 | Lengthened type wind driven generator blade |
| CN103899574A (en) * | 2012-12-27 | 2014-07-02 | 南通大通宝富风机有限公司 | Free-form surface three-dimensional flow impeller of vacuum pump |
| CN203488432U (en) * | 2013-10-01 | 2014-03-19 | 湖北双剑鼓风机股份有限公司 | Ternary-flow impeller of high-efficiency compressor |
| CN205446179U (en) * | 2016-02-24 | 2016-08-10 | 西安交通大学 | Three -dimensional flow centrifugal fan impeller blade structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945533A (en) * | 2016-05-18 | 2016-09-21 | 重庆通用工业(集团)有限责任公司 | Forming method for centrifugal fan blades |
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Application publication date: 20160504 |
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