CN113530886A - Large wind tunnel fan impeller - Google Patents
Large wind tunnel fan impeller Download PDFInfo
- Publication number
- CN113530886A CN113530886A CN202010321670.9A CN202010321670A CN113530886A CN 113530886 A CN113530886 A CN 113530886A CN 202010321670 A CN202010321670 A CN 202010321670A CN 113530886 A CN113530886 A CN 113530886A
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- CN
- China
- Prior art keywords
- blade
- ring layer
- threaded connection
- connection section
- metal
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
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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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
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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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of wind tunnel fans, and particularly relates to a large wind tunnel fan impeller, which comprises an integral blade, a hub and a blade fixing device, wherein the integral blade is inserted into the hub and fixed by the blade fixing device, and the large wind tunnel fan impeller is characterized in that: the integral blade comprises a blade body, a blade handle and a metal foot, wherein the blade handle is in a long rod shape and is connected with the metal foot into a whole at the root part, and the metal foot is provided with a threaded connection section and a non-threaded connection section; the hub is composed of a metal inner ring layer and a composite material outer ring layer, the metal inner ring layer and the composite material outer ring layer are connected together through bolts, the metal inner ring layer is provided with a blade mounting hole I and a blade mounting hole II, and the composite material outer ring layer is provided with a blade mounting hole III; the blade fixing device is composed of a shaft nut and an expansion sleeve, the shaft nut is installed on the threaded connection section of the metal foot, and the expansion sleeve is installed on the non-threaded connection section of the metal foot. The invention has the advantages of light weight, small rotational inertia, good mechanical property, high reliability, convenient blade adjustment, small processing and manufacturing difficulty and relatively low cost.
Description
Technical Field
The invention belongs to the technical field of wind tunnel fans, and particularly relates to a large wind tunnel fan impeller.
Background
The wind tunnel is a pipeline experimental device which generates and controls airflow through a wind tunnel fan by utilizing the principle of relative motion so as to simulate the flow of air around an aircraft or an object, can measure the action of the airflow on the object and observe physical phenomena, is the most basic tool in the aerodynamic research and test process, and is widely applied to the industries of aerospace, high-speed rail, automobiles and the like.
With the rapid development of aerospace, high-speed rail and automobile industries in China, wind tunnel laboratories are more and more, and wind tunnel fans are more and more in demand as core equipment of the wind tunnel laboratories. The wind tunnel fan belongs to large-scale equipment, the size of an impeller of the wind tunnel fan is correspondingly large, and the diameter of partial machine type impellers can reach more than ten meters, so that the processing, manufacturing and transportation of the impellers are extremely difficult. At present, the prior wind tunnel fan impeller in China usually adopts an integral steel impeller hub, blades of the wind tunnel fan impeller hub are connected with a blade handle shaft through bolts, and the blade handle shaft is locked with the hub through nuts. The first problem is that when the hub is large in size, the weight of the impeller is large due to the adoption of the integral steel impeller hub, the rotational inertia is increased, a bearing of a motor is greatly tested, and the integral steel impeller hub is difficult to machine; the second problem is that the wind tunnel fan impeller usually works for a long time, the blade does work more greatly and is acted by pneumatic force for a long time, if the blade and a blade handle shaft are connected together through a bolt, the bolt connection position is acted by alternating bending moment, so that the fatigue fracture of the bolt is easily caused, and the reliability of the wind tunnel is seriously influenced; the third problem is that the blade stem shaft and the hub are locked through the nut, which is not beneficial to the adjustment of the opening of the fan blade, and the possibility that the blade rotates along with the nut exists in the process of screwing the nut.
Disclosure of Invention
The invention aims to overcome the defects and provides the large wind tunnel fan impeller which is light in weight, small in rotational inertia, good in mechanical property, high in reliability, convenient to adjust blades, small in processing and manufacturing difficulty and relatively low in cost.
The technical scheme of the invention is as follows: the utility model provides a large-scale wind-tunnel fan wheel, includes integral blade, wheel hub, blade fixing device, and integral blade inserts wheel hub and is fixed by blade fixing device, its characterized in that: the integral blade comprises a blade body, a blade handle and a metal foot, wherein the blade handle is in a long rod shape and is connected with the metal foot into a whole at the root part, and the metal foot is provided with a threaded connection section and a non-threaded connection section; the hub is composed of a metal inner ring layer and a composite material outer ring layer, the metal inner ring layer and the composite material outer ring layer are connected together through bolts, the metal inner ring layer is provided with a blade mounting hole I and a blade mounting hole II, and the composite material outer ring layer is provided with a blade mounting hole III; the blade fixing device comprises a shaft nut and an expansion sleeve, the shaft nut is arranged at a threaded connection section of a metal foot, the expansion sleeve is arranged at a non-threaded connection section of the metal foot, the blade body and the blade handle are made of composite materials, the composite material outer ring layer is formed by splicing n identical sub-components, and n is larger than 1.
The invention has the beneficial effects that: compared with the traditional design that the blades are connected with the blade handle shaft through bolts, the integral blades are adopted, so that the fatigue damage of the blade bolts caused by pneumatic bending moment can be effectively avoided, and the fault points of the rotor are reduced; the integral blade and the hub are connected through the shaft nut and the expansion sleeve, the shaft nut can bear larger centrifugal force of the blade in the operation process, the expansion sleeve can prevent the blade from rotating due to bearing pneumatic bending moment, the expansion sleeve is loosened when the angle of the blade needs to be adjusted, and the large wind tunnel fan blade is more convenient to mount and adjust due to the matched use of the shaft nut and the expansion sleeve; the wheel hub is composed of the metal inner ring layer and the composite material outer ring layer, the density of the composite material is only one fifth of that of steel, so that compared with an integral steel wheel hub, the weight and the rotational inertia of the wheel hub are effectively reduced, the light wheel hub can reduce the burden of a motor bearing, even the type selection downshift of the motor bearing is caused, and the cost is reduced. Meanwhile, the reduction of the rotational inertia greatly improves the dynamic performance of the whole driving system.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of a blade according to the present invention.
FIG. 3 is a schematic view of a metal pin structure according to the present invention.
Fig. 4 is a schematic view of the hub structure of the present invention.
FIG. 5 is a schematic view of a blade fixing device according to the present invention.
In the drawings, corresponding technical features are labeled as follows:
1-integral blade, 2-hub, 3-blade fixing device, 4-blade body, 5-blade handle, 6-metal foot, 7-threaded connection section, 8-non-threaded connection section, 9-composite material outer ring layer, 10-metal inner ring layer, 11-blade mounting hole I, 12-blade mounting hole II, 13-blade mounting hole III, 14-shaft nut and 15-account sleeve.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 or 2 or 3 or 4 or 5, in the implementation of the invention, the metal inner ring layer 10 and the composite material outer ring layer 9 of the hub 2 are connected into a whole through bolts, the integral blade 1 is inserted into the hub 2 through the blade mounting hole iii 13, the blade mounting hole ii 12 and the blade mounting hole i 11 in sequence, the threaded connection section 7 and the non-threaded connection section 8 of the metal foot 6 of the integral blade pass through the mounting hole i 11, the blade body 4 is rotated to a mounting angle, the shaft nut 14 of the blade fixing device 3 is mounted on the threaded connection section 7 of the metal foot 6 and screwed down, finally the account cover 15 of the blade fixing device 3 is mounted on the non-threaded connection section 8 of the metal foot 6 to fix the integral blade 1 without rotating, and when the angle of the integral blade 1 is to be adjusted, the account cover 15 is loosened. Practical use shows that the large wind tunnel fan impeller is light in weight, small in rotational inertia, good in mechanical property, high in reliability, convenient to adjust blades, small in processing and manufacturing difficulty and relatively low in cost.
Claims (3)
1. The utility model provides a large-scale wind-tunnel fan wheel, includes integral blade, wheel hub, blade fixing device, and integral blade inserts wheel hub and is fixed by blade fixing device, its characterized in that: the integral blade comprises a blade body, a blade handle and a metal foot, wherein the blade handle is in a long rod shape and is connected with the metal foot into a whole at the root part, and the metal foot is provided with a threaded connection section and a non-threaded connection section; the hub is composed of a metal inner ring layer and a composite material outer ring layer, the metal inner ring layer and the composite material outer ring layer are connected together through bolts, the metal inner ring layer is provided with a blade mounting hole I and a blade mounting hole II, and the composite material outer ring layer is provided with a blade mounting hole III; the blade fixing device is composed of a shaft nut and an expansion sleeve, the shaft nut is installed on the threaded connection section of the metal foot, and the expansion sleeve is installed on the non-threaded connection section of the metal foot.
2. A large wind tunnel fan impeller according to claim 1 wherein: the blade body and the blade stalk are made of composite materials.
3. A large wind tunnel fan impeller according to claim 1 or 2, characterised in that: the composite material outer ring layer is formed by splicing n identical sub-components, and n is larger than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321670.9A CN113530886A (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321670.9A CN113530886A (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113530886A true CN113530886A (en) | 2021-10-22 |
Family
ID=78123985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010321670.9A Pending CN113530886A (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113530886A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201763681U (en) * | 2010-09-21 | 2011-03-16 | 浙江亿利达风机股份有限公司 | Adjustable impeller structure of axial-flow air blower |
| US20110240268A1 (en) * | 2010-04-05 | 2011-10-06 | Moore John D | Super low noise fan blades, axial flow fans incorporating the same, and commercial air cooled apparatuses incorporating such axial flow fans |
| CN202789720U (en) * | 2012-05-14 | 2013-03-13 | 肇庆国通风机有限公司 | Adjustable type axial flow fan impeller |
| CN205136122U (en) * | 2015-11-26 | 2016-04-06 | 湖南科技大学 | Blade angle adjustable axial fan impeller |
| CN205173057U (en) * | 2015-10-28 | 2016-04-20 | 上海鼓风机厂有限公司 | Axial -flow blower blade retention mechanism |
| CN108757270A (en) * | 2018-07-10 | 2018-11-06 | 江苏新扬新材料股份有限公司 | Integrated molding composite material blade structure |
| CN212508974U (en) * | 2020-04-22 | 2021-02-09 | 中国电建集团透平科技有限公司 | Large wind tunnel fan impeller |
-
2020
- 2020-04-22 CN CN202010321670.9A patent/CN113530886A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110240268A1 (en) * | 2010-04-05 | 2011-10-06 | Moore John D | Super low noise fan blades, axial flow fans incorporating the same, and commercial air cooled apparatuses incorporating such axial flow fans |
| CN102947595A (en) * | 2010-04-05 | 2013-02-27 | 穆尔风扇有限责任公司 | Commercial air cooled apparatuses incorporating axial flow fans comprising super low noise fan blades |
| CN201763681U (en) * | 2010-09-21 | 2011-03-16 | 浙江亿利达风机股份有限公司 | Adjustable impeller structure of axial-flow air blower |
| CN202789720U (en) * | 2012-05-14 | 2013-03-13 | 肇庆国通风机有限公司 | Adjustable type axial flow fan impeller |
| CN205173057U (en) * | 2015-10-28 | 2016-04-20 | 上海鼓风机厂有限公司 | Axial -flow blower blade retention mechanism |
| CN205136122U (en) * | 2015-11-26 | 2016-04-06 | 湖南科技大学 | Blade angle adjustable axial fan impeller |
| CN108757270A (en) * | 2018-07-10 | 2018-11-06 | 江苏新扬新材料股份有限公司 | Integrated molding composite material blade structure |
| CN212508974U (en) * | 2020-04-22 | 2021-02-09 | 中国电建集团透平科技有限公司 | Large wind tunnel fan impeller |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211022 |