CN2045433U - Mixed-flow type fan - Google Patents
Mixed-flow type fan Download PDFInfo
- Publication number
- CN2045433U CN2045433U CN 88214347 CN88214347U CN2045433U CN 2045433 U CN2045433 U CN 2045433U CN 88214347 CN88214347 CN 88214347 CN 88214347 U CN88214347 U CN 88214347U CN 2045433 U CN2045433 U CN 2045433U
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- China
- Prior art keywords
- flow
- impeller
- blade
- mixed
- spiral case
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Abstract
The utility model discloses a mixed-flow type fan, in particular to a nearly centrifugal type mixed-flow type fan, which is composed of an impeller, a rotary vane-less diffuser, a spiral casing, and an air inlet flow guiding cone. The nearly centrifugal type mixed-flow type fan is characterized in that the included angle of the average flow surface of the outlet of the impeller vane and the shaft line is 45-75 DEG; the relative shaft line of the inlet average flow surface tilts 25-30 DEG; because of the adoption of the flow-type fan structure of the nearly centrifugal type fan, the centrifugal type fan can keep the feature with simple structure. The utility model has the advantages of low cost and less noise; because of the adoption of the three-dimensional twisting vane, the inlet of the impeller blade can introduce the air current through a small attack angle along the vane height; the air current can be avoided the nearly right cornering on the centrifugal type impeller; the vane flow passage is longer than the flow passage of the centrifugal type; the change of the air-current parameter radius is small; accordingly, the loss is small, and the efficiency is high.
Description
The utility model relates to a kind of mixed flow fan, particularly a kind ofly is bordering on centrifugal mixed flow fan.
Mixed flow fan is the novel fan of a kind of boundary between axial flow and centrifugal fan.The flow coefficient height of axial fan, efficient height, and pressure coefficient is low, efficient working range is narrow; Opposite its pressure coefficient height of centrifugal fan, efficient working range are wide, and flow coefficient is low, efficient is low.Mixed flow fan combines the advantage of axial flow and centrifugal two kinds of blower fans.The prior art of this technical field, Chinese patent (CN85100823) discloses a kind of mixed flow fan, and this blower fan is aerofoil profile oblique flow wheel top surface inclination angle θ
1(21 °～29 °), hub disk face tilt angle θ
2Be the mixed flow fan that is bordering on axial flow of (41 °～40 °), it is applicable to that higher specific speed scope is generally (70～130), because this machine is similar to the shaft flow structure more complicated, thereby cost is also higher.
In view of the restriction of the application area of above-mentioned prior art, to be that design is a kind of be applicable to than low-specific-speed (30～60) the purpose of this utility model, simple in structure, cost is low is bordering on centrifugal mixed flow fan.These facility have the efficient scope of higher total pressure efficiency, broad, and noise is lower.
The design proposal of finishing above-mentioned purpose is: a kind of mixed flow fan, has impeller, the rotation vaneless diffuser, spiral case, the air inlet flow deflecting cone, the angle that it is characterized in that impeller blade outlet average stream and axis is (45 °～75 °), the relative axis tilt of import average stream (25 °～30 °), owing to adopted and be bordering on centrifugal mixed flow fan structure, kept the centrifugal fan characteristic of simple structure, make finished product lower, owing to adopt the twisted blade in ternary space, all introduce air-flow in the impeller blade import along the leaf height with the very little angle of attack, avoid the turning that be bordering on right angle of air-flow at centrifugal impeller, the length of blade passage ratio centrifugal, flow parameter is little along the variation of radius, thereby lose little and the efficient height, noise is less, all introduce with the very little angle of attack along the leaf height because of ternary spatial warping blade under design conditions can make air-flow again, just the angle of attack just changes when working conditions change, so efficient wide ranges; Become the inclination stream interface of mixed-flow when centrifugal warp-wise stream interface after, its to axial strength of vortex be the Sin θ of warp-wise
2Doubly, under the identical situation of other conditions, just can increase slip coefficient, also just improve head coefficient.
Further specify it below with reference to the accompanying drawings:
Fig. 1 is the schematic configuration diagram of mixed flow fan;
Fig. 1 has described a schematic representation that is bordering on centrifugal mixed flow fan, and it is made up of suction port 1, air inlet flow deflecting cone 2, mixed-flow impeller 3 and rotation vaneless diffuser 4 and spiral case 5.The convergence angle of suction port 1 is 30 °～49 °, relies on the cooperation of the molded lines of air inlet flow deflecting cone 2 to draw impeller inlet velocity distribution preferably.Relative velocity minimum with the inlet vane top is a design object, according to the flow coefficient of choosing and blade import root through with the ratio of blade exit average diameter, determine that by optimal conditions import optimizes size and flow parameter thereof.According to mixed-flow impeller outlet average stream and axis angle and its head coefficient, select the exit angle of blade again, determine the number of blade again, blade is generally at 12～16.Provide along absolute exit velocity such as Ye Gao and after waiting the flow pattern of absolute outlet meridian speed, can determine blade exit size and flow parameter thereof.Satisfy this flow pattern and adopt the parabolic board-like blade that forms uniform thickness of the non-straight burr of opening up.Calculate velocity distribution in the impeller blade by quasi-three dimensional flow again, revise wheel cap and the wheel disc molded lines of determining impeller again.The utility model does not adopt vane diffuser, and adopt the wheel cap of impeller outlet and wheel disc to prolong the circular arc type rotation vaneless diffuser 4 that forms, make the absolute velocity of blade exit air-flow and spiral case profile become relative velocity with enclosing cover for impeller and wheel disc elongated surfaces, thereby speed is less, loss and noise are reduced, make air-flow progressively turn to the warp-wise outlet by rotation vaneless diffuser 4 again, thereby reduce loss by the oblique outlet of blade exit.
The utility model adopts the spiral case 5 of easy rectangular cross-section, gets the average outlet diameter D of spiral case width B and impeller blade
2Ratio be 0.5 Volute Design for best basic constant speed, its outlet both sides have the exhaust diffuser of the spiral case 5 of 8 angles of flare, to reduce dynamic pressure, improve static pressure.
This machine adopts the air inlet test method according to GB1236-85 " ventilator airperformance test method ", measures noise according to international GB2888-82 " fan noise method of measurement ".In the time of 2900 rev/mins, the highest total pressure efficiency η max=83%, this moment flow coefficient φ=0.175, than A sound level Lsa=1 ρ db(A) efficient wide ranges (ratio of the flow coefficient when the flow coefficient difference of the operating range of η 〉=0.9 η max and peak efficiency is 0.8).
Claims (4)
1, a kind of mixed flow fan has impeller, rotation vaneless diffuser, spiral case, air inlet flow deflecting cone suction port.The angle that it is characterized in that impeller blade outlet average stream and axis is (45 °～75 °), and the angle of import stream interface and axis is (25 °～30 °).
2, mixed flow fan according to claim 1, the prolongation that it is characterized in that rotating vaneless diffuser and be enclosing cover for impeller and wheel disc all is a circular arc type, by the oblique rotation vaneless diffuser that transfers last warp-wise outlet to.
3, mixed flow fan according to claim 1, the blade that it is characterized in that impeller are the board-like blade of the paraboloidal equal thickness of the non-straight burr of opening up, and the number of blade is 12～16.
4, mixed flow fan according to claim 1 is characterized in that spiral case is the spiral case of rectangular cross-section, spiral case width B and impeller blade outlet average diameter D
2Ratio be 0.5 the best, spiral case outlet has the spiral case exhaust diffuser that both sides are 8 angle of flare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214347 CN2045433U (en) | 1988-09-26 | 1988-09-26 | Mixed-flow type fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214347 CN2045433U (en) | 1988-09-26 | 1988-09-26 | Mixed-flow type fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2045433U true CN2045433U (en) | 1989-10-04 |
Family
ID=4847304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88214347 Withdrawn CN2045433U (en) | 1988-09-26 | 1988-09-26 | Mixed-flow type fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2045433U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208218A (en) * | 2011-05-19 | 2011-10-05 | 清华大学 | Primary helium fan intake header for high-temperature gas-cooled reactor |
| CN103307002A (en) * | 2013-06-04 | 2013-09-18 | 广东美的制冷设备有限公司 | Oblique flow blower |
| CN104100550A (en) * | 2013-04-14 | 2014-10-15 | 枣庄神工制冷机械有限公司 | Centrifugal inclined axial flow fan |
| CN104279188A (en) * | 2014-10-29 | 2015-01-14 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with same |
| CN105386998A (en) * | 2015-11-27 | 2016-03-09 | 中国航空动力机械研究所 | Returning device and double-stage combined air compressor with same |
| CN106989042A (en) * | 2017-05-24 | 2017-07-28 | 濮阳市华南重工科技有限公司 | A kind of mixed flow fan and its manufacture method |
| CN110374900A (en) * | 2019-08-09 | 2019-10-25 | 西安交通大学 | A kind of flow-mixing blower fan with sinusoidal pattern meridional channel |
| CN110374924A (en) * | 2019-07-23 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of mixed-flow pump |
| CN111120351A (en) * | 2019-12-18 | 2020-05-08 | 沈阳透平机械股份有限公司 | Single-shaft isothermal centrifugal air compressor |
| CN111133203A (en) * | 2017-09-20 | 2020-05-08 | 西门子股份公司 | Flowable through device |
| CN111396328A (en) * | 2020-04-30 | 2020-07-10 | 北京动力机械研究所 | A high-efficient centrifugal compressor arrangement for inert mixed working medium |
| CN111396329A (en) * | 2020-04-30 | 2020-07-10 | 北京动力机械研究所 | High-efficient centrifugal compressor arrangement suitable for inert mixed working medium |
| WO2021017321A1 (en) * | 2019-07-31 | 2021-02-04 | 中车永济电机有限公司 | Mixed flow fan and motor |
-
1988
- 1988-09-26 CN CN 88214347 patent/CN2045433U/en not_active Withdrawn
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208218A (en) * | 2011-05-19 | 2011-10-05 | 清华大学 | Primary helium fan intake header for high-temperature gas-cooled reactor |
| CN104100550A (en) * | 2013-04-14 | 2014-10-15 | 枣庄神工制冷机械有限公司 | Centrifugal inclined axial flow fan |
| CN103307002A (en) * | 2013-06-04 | 2013-09-18 | 广东美的制冷设备有限公司 | Oblique flow blower |
| CN103307002B (en) * | 2013-06-04 | 2016-08-10 | 广东美的制冷设备有限公司 | Oblique flow blower |
| CN104279188A (en) * | 2014-10-29 | 2015-01-14 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with same |
| CN105386998A (en) * | 2015-11-27 | 2016-03-09 | 中国航空动力机械研究所 | Returning device and double-stage combined air compressor with same |
| CN106989042A (en) * | 2017-05-24 | 2017-07-28 | 濮阳市华南重工科技有限公司 | A kind of mixed flow fan and its manufacture method |
| CN111133203A (en) * | 2017-09-20 | 2020-05-08 | 西门子股份公司 | Flowable through device |
| US11225977B2 (en) | 2017-09-20 | 2022-01-18 | Siemens Energy Global GmbH & Co. KG | Flow-through arrangement |
| CN111133203B (en) * | 2017-09-20 | 2021-03-09 | 西门子股份公司 | Flowable through device |
| CN110374924A (en) * | 2019-07-23 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of mixed-flow pump |
| WO2021017321A1 (en) * | 2019-07-31 | 2021-02-04 | 中车永济电机有限公司 | Mixed flow fan and motor |
| CN110374900A (en) * | 2019-08-09 | 2019-10-25 | 西安交通大学 | A kind of flow-mixing blower fan with sinusoidal pattern meridional channel |
| CN111120351A (en) * | 2019-12-18 | 2020-05-08 | 沈阳透平机械股份有限公司 | Single-shaft isothermal centrifugal air compressor |
| CN111396328A (en) * | 2020-04-30 | 2020-07-10 | 北京动力机械研究所 | A high-efficient centrifugal compressor arrangement for inert mixed working medium |
| CN111396329A (en) * | 2020-04-30 | 2020-07-10 | 北京动力机械研究所 | High-efficient centrifugal compressor arrangement suitable for inert mixed working medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |