CN212508974U - Large wind tunnel fan impeller - Google Patents
Large wind tunnel fan impeller Download PDFInfo
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- CN212508974U CN212508974U CN202020612818.XU CN202020612818U CN212508974U CN 212508974 U CN212508974 U CN 212508974U CN 202020612818 U CN202020612818 U CN 202020612818U CN 212508974 U CN212508974 U CN 212508974U
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- blade
- ring layer
- tunnel fan
- fixing device
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Abstract
The utility model belongs to the technical field of wind-tunnel fan, concretely relates to large-scale wind-tunnel fan wheel, this large-scale wind-tunnel fan wheel, including integral blade, wheel hub, blade fixing device, 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; the hub is composed of a metal inner ring layer and a composite material outer ring layer, and the metal inner ring layer and the composite material outer ring layer are connected together through bolts; the blade fixing device consists of a shaft nut and an expansion sleeve. The utility model discloses light in weight, inertia is little, and mechanical properties is good, and the reliability is high, and the blade is adjusted conveniently, and the processing preparation degree of difficulty is little moreover, and the cost is lower relatively.
Description
Technical Field
The utility model belongs to the technical field of wind-tunnel fan, especially a large-scale 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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned defect, provide a large-scale wind-tunnel fan impeller, its light in weight, inertia is little, and mechanical properties is good, and the reliability is high, and the blade is adjusted conveniently, and the processing preparation degree of difficulty is little moreover, and the cost is lower relatively.
The utility model discloses technical scheme: 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 utility model has the advantages that: the utility model adopts the integral blade, compared with the traditional design that the blade is connected with the blade handle shaft through the bolt, the integral blade can effectively avoid the fatigue damage of the blade bolt caused by pneumatic bending moment, and reduce the fault point of the rotor; 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 structural diagram of the present invention.
Fig. 2 is a schematic view of the blade structure of the present invention.
Fig. 3 is a schematic view of the metal leg structure of the present invention.
Fig. 4 is the schematic view of the hub structure of the present invention.
Fig. 5 is a schematic structural view of the blade fixing device of 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 present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 or 2 or 3 or 4 or 5, when implementing the utility model discloses, earlier become a whole through bolted connection with the outer circle layer 9 of combined material with the metal inner circle layer 10 of wheel hub 2, loop through blade mounting hole III 13 with integral blade 1 again, blade mounting hole II 12, blade mounting hole I11 inserts in wheel hub 2, make its threaded connection section 7 and the non-threaded connection section 8 of metal foot 6 pass mounting hole I11, rotate blade 4 to installation angle, install the shaft nut 14 of blade fixing device 3 at the threaded connection section 7 of metal foot 6 and screw up can again, install the account cover 15 of blade fixing device 3 at the non-threaded connection section 8 of metal foot 6 and make integral blade 1 fixed no longer rotatory at last, it can to loosen account cover 15 when will adjusting integral blade 1 angle. 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 |
|---|---|---|---|
| CN202020612818.XU CN212508974U (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020612818.XU CN212508974U (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508974U true CN212508974U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020612818.XU Active CN212508974U (en) | 2020-04-22 | 2020-04-22 | Large wind tunnel fan impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508974U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530886A (en) * | 2020-04-22 | 2021-10-22 | 中国电建集团透平科技有限公司 | Large wind tunnel fan impeller |
| CN116576152A (en) * | 2023-07-12 | 2023-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
-
2020
- 2020-04-22 CN CN202020612818.XU patent/CN212508974U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530886A (en) * | 2020-04-22 | 2021-10-22 | 中国电建集团透平科技有限公司 | Large wind tunnel fan impeller |
| CN116576152A (en) * | 2023-07-12 | 2023-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
| CN116576152B (en) * | 2023-07-12 | 2023-09-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
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