CN211924558U - Low-noise centrifugal impeller - Google Patents
Low-noise centrifugal impeller Download PDFInfo
- Publication number
- CN211924558U CN211924558U CN202020501484.9U CN202020501484U CN211924558U CN 211924558 U CN211924558 U CN 211924558U CN 202020501484 U CN202020501484 U CN 202020501484U CN 211924558 U CN211924558 U CN 211924558U
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- China
- Prior art keywords
- blade
- hole
- holes
- centrifugal impeller
- alumina ceramic
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 6
- 239000011224 oxide ceramic Substances 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a low noise centrifugal impeller, which comprises a wheel body, wheel body outer wall fixedly connected with blade, No. one through-hole has all been seted up on blade both sides surface, alumina ceramic piece is installed to the blade inboard, the end cover is all installed on alumina ceramic piece both sides surface, No. two through-holes have been seted up on the end cover surface, No. three through-holes have been seted up to end cover one side, No. three through-hole inner wall integrated into one piece have the lug, high silica glass fiber post is installed to lug one side, alumina ceramic piece one side is equipped with the backup pad, the connecting block has all been welded at the backup pad both ends, the utility model discloses a set the blade into hollow structure to set up a plurality of sound absorbing mechanism in the blade inboard, can effectually absorb the noise, thereby reduce the noise of impeller during operation.
Description
Technical Field
The utility model relates to an aeroengine technical field specifically is a low noise centrifugal impeller.
Background
The aircraft engine is a highly complex and precise thermal machine, is used as the heart of an aircraft, is not only the power of the aircraft flight, but also an important driving force for promoting the development of aviation industry, and each important change in human aviation history is inseparable from the technical progress of the aircraft engine. In the 21 st century, the development of aero-engines is further accelerated, and a new significant revolution is brought to the field of human aviation. Traditional aircraft engines are developing into gear-driven engines, variable-cycle engines, multi-electric engines, intercooling regenerative engines and open-rotor engines, non-traditional pulse detonation engines, scramjet engines, turbine-based combination engines, solar power and fuel cell power and the like are also continuously maturing, the development of the engines enables future aircrafts to be faster, taller, farther, more economical and more reliable, can meet stricter environmental requirements, and enables hypersonic aircrafts, transoceand aircrafts and reusable shuttle aircrafts to be transported to and fro on the earth.
The impeller is generally a component of a centrifugal compressor, and is a component rotating at high speed, a channel between blades on a working impeller is in an expansion shape, and when air flows through the channel, the channel works on the air to increase the flow velocity of the air, so that conditions are created for pressurizing the air in a diffuser. At the same time, the pressure of the air is increased, which is what is called diffusion supercharging. The impeller is generally made of aluminum alloy by forging and then heat-treating, and the centrifugal impeller of a small engine is also made of titanium alloy by casting. The impeller is positioned on and driven by a centrifugal impeller shaft, and the shaft is transmitted and twisted through end teeth or precision bolts, and the centering of the impeller when the impeller is radially deformed due to heating or centrifugal load is ensured.
However, the existing centrifugal impeller for the aircraft engine mainly has the following disadvantages:
the existing centrifugal impeller for the aircraft engine has high noise generated during working and is easy to damage hearing systems of workers.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low noise centrifugal impeller to it is great at the noise that the during operation produced to solve current being used for aeroengine centrifugal impeller among the above-mentioned background art, causes the problem of damage to staff's hearing system easily.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low noise centrifugal impeller, includes the wheel body, wheel body outer wall fixedly connected with blade, a through-hole has all been seted up on blade both sides surface, the alumina ceramic piece is installed to the blade inboard, the end cover is all installed on alumina ceramic piece both sides surface, No. two through-holes have been seted up on the end cover surface, No. three through-holes have been seted up to end cover one side, No. three through-hole inner wall integrated into one piece have the lug, high silica glass fiber post is installed to lug one side, alumina ceramic piece one side is equipped with the backup pad, the connecting block has all been welded at the backup pad both ends.
Preferably, the inner side of each blade is of a hollow structure, and a sound absorption structure can be arranged on the inner side of each blade, so that the noise generated when the centrifugal impeller works can be reduced.
Preferably, the alumina ceramic blocks are provided with a plurality of alumina ceramic blocks, the end covers are made of alumina ceramic materials and correspond to the first through holes, the alumina ceramic is a ceramic material taking alumina as a main body, the alumina ceramic has better conductivity, mechanical strength and high temperature resistance, can bear high temperature generated when the impeller works, and corresponds to the first through holes through the end covers, and is favorable for conduction of sound waves.
Preferably, the third through hole and the first through hole are both provided with multiple groups in parallel, so that the conduction of sound waves is facilitated, and the sound waves are subjected to silencing treatment.
Preferably, the second through hole is communicated with the third through hole, so that sound waves are processed for multiple times as far as possible, and the noise reduction effect is improved.
Preferably, the supporting plates are arranged in a plurality of numbers, reinforcing ribs are welded at joints of the supporting plates and the connecting blocks, the strength, rigidity and torsion resistance of the joints of the supporting plates and the connecting blocks are enhanced by the reinforcing ribs, and the problem that products are distorted and deformed due to uneven stress caused by wall thickness difference of the supporting plates can be solved, so that the strength of a joint surface is increased.
The utility model provides a low noise centrifugal impeller possesses following beneficial effect:
(1) the utility model discloses a No. three through-hole inboards are equipped with high silica glass fiber post, have the multifilament structure through high silica glass fiber, and high temperature resistant is effectual moreover, through countless fibrous reflection, stack each other, collision when the sound wave passes through high silica glass fiber, sound wave energy conversion is heat energy, and sound wave intensity weakens, and sound disappears, can effectual noise reduction.
(2) The utility model discloses a No. three through-hole inner walls are equipped with a plurality of lugs, make the sound wave in the inboard multiple reflection of No. three through-holes, are favorable to the consumption of sound wave energy to the noise reduction.
(3) The utility model discloses a wheel body drives the blade when rotating, and the sound that produces when the air current striking blade enters into the inboard of blade through the through-hole of a number of seting up on the blade, and No. two through-holes that set up through the end cover surface are corresponding with a through-hole, and when sound entered into No. two through-holes through a through-hole inboard, the sound wave entered into can be at repetitive oscillation between them after No. two through-holes are inboard, is consumed partly rapidly, is favorable to the energy among the absorbed noise.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the blade of the present invention;
FIG. 3 is a schematic sectional view of the blade of the present invention;
fig. 4 is a schematic view of the cross-sectional structure of the alumina ceramic block of the present invention.
In the figure: 1. a wheel body; 2. a blade; 201. a first through hole; 3. an alumina ceramic block; 301. an end cap; 302. a second through hole; 303. a third through hole; 304. a bump; 305. a high silica glass fiber column; 4. a support plate; 401. connecting blocks; 402. and (5) reinforcing ribs.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-4, the utility model provides a technical solution: the utility model provides a low noise centrifugal impeller, includes wheel body 1, 1 outer wall fixedly connected with blade 2 of wheel body, No. one through-hole 201 has all been seted up on 2 both sides surfaces of blade, alumina ceramic piece 3 is installed to 2 inboard blades, end cover 301 is all installed on 3 both sides surfaces of alumina ceramic piece, No. two through-holes 302 have been seted up on end cover 301 surface, No. three through-holes 303 have been seted up to end cover 301 one side, No. three through-holes 303 inner wall integrated into one piece has lug 304, high silica glass fiber post 305 is installed to lug 304 one side, 3 one sides of alumina ceramic piece are equipped with backup pad 4, connecting block 401 has all been welded at backup pad 4 both ends.
When the blade 2 is driven to rotate by the wheel body 1, when sound generated by airflow impacting the blade 2 enters the inner side of the blade 2 through the first through hole 201 formed in the blade 2, the sound enters the inner side of the second through hole 302 through the second through hole 302 formed in the surface of the end cover 301 and corresponds to the first through hole 201, when the sound enters the inner side of the second through hole 302 through the first through hole 201, sound waves repeatedly oscillate between the sound waves after entering the inner side of the second through hole 302, a part of the sound waves are rapidly consumed and continuously transmitted to the inner side of the third through hole 303, a plurality of convex blocks 304 are arranged on the inner wall of the third through hole 303, the sound waves are repeatedly reflected on the inner side of the third through hole 303, the consumption of sound wave energy is facilitated, high silica glass fiber columns 305 are arranged on the inner side of the third through hole 303, the high silica glass fibers have a multi-fiber structure, and the sound waves are reflected, sound wave energy conversion becomes heat energy, and sound intensity weakens, and sound disappears, and connecting block 401 has all been welded through 4 both ends of backup pad to inner wall welding through connecting block 401 and blade 2 links to each other, thereby can effectually consolidate the structural strength of 2 inboards of blade, prevents that blade 2 from receiving the impact and warping.
The inner sides of the blades 2 are of hollow structures, and sound absorption structures can be arranged on the inner sides of the blades 2, so that the noise generated when the centrifugal impeller works can be reduced.
The alumina ceramic piece 3 is equipped with a plurality ofly, end cover 301 is the alumina ceramic material, and end cover 301 corresponds with a logical hole 201, and the alumina ceramic is a ceramic material that uses alumina as the main part, and the alumina ceramic has better conductibility, mechanical strength and high temperature resistance, can bear the high temperature that the impeller during operation produced to it is corresponding with a logical hole 201 through end cover 301, is favorable to the conduction of sound wave.
No. three through-holes 303 and a through-hole 201 all are equipped with the multiunit in parallel, are favorable to the conduction of sound wave to carry out noise elimination to the sound wave.
The second through hole 302 is connected with the third through hole 303 in a conduction mode, so that sound waves are processed for multiple times as far as possible, and the noise reduction effect is improved.
The supporting plates 4 are arranged in a plurality of numbers, the reinforcing ribs 402 are welded at the joints of the supporting plates 4 and the connecting blocks 401, the strength, the rigidity and the torsion resistance of the joints of the supporting plates 4 and the connecting blocks 401 are enhanced by arranging the reinforcing ribs 402, and the problem that products are askew and deformed due to uneven stress caused by wall thickness difference of the supporting plates 4 can be solved, so that the strength of a joint surface is increased.
It should be noted that, when the low-noise centrifugal impeller works, the outer wall of the impeller body 1 is fixedly connected with the blades 2, the surfaces of the two sides of each blade 2 are respectively provided with a first through hole 201, the inner sides of the blades 2 are provided with the alumina ceramic blocks 3, the surfaces of the two sides of the alumina ceramic blocks 3 are respectively provided with the end covers 301, the surface of each end cover 301 is provided with a second through hole 302, one side of each end cover 301 is provided with a third through hole 303, the inner walls of the third through holes 303 are integrally formed with convex blocks 304, one side of each convex block 304 is provided with a high silica glass fiber column 305, one side of each alumina ceramic block 3 is provided with the supporting plate 4, the two ends of each supporting plate 4 are respectively welded with the connecting blocks 401, when the blades 2 are driven to rotate by the impeller body 1, when sound generated by airflow impacting the blades 2 enters the inner sides of the blades 2 through, when sound enters the inner side of the second through hole 302 through the first through hole 201, the sound wave can repeatedly oscillate between the inner sides of the second through hole 302, a part of the sound wave is rapidly consumed, and is continuously transmitted to the inner side of the third through hole 303, the sound wave is repeatedly reflected on the inner side of the third through hole 303 through the plurality of bumps 304 arranged on the inner wall of the third through hole 303, so that the consumption of sound wave energy is facilitated, the high silica glass fiber column 305 is arranged on the inner side of the third through hole 303, the high silica glass fiber has a multi-fiber structure, the sound wave passes through the high silica glass fiber, and is reflected, mutually superposed and collided by countless fibers, so that the sound wave energy is converted into heat energy, the sound wave intensity is weakened, the sound disappears, and the noise can be effectively reduced, the connecting blocks 401 are welded on the two ends of the supporting plate 4, and are welded with the inner wall of the blade 2, the blades 2 are prevented from being deformed due to impact, the inner sides of the blades 2 are of hollow structures, sound absorption structures can be arranged on the inner sides of the blades 2, noise generated when the centrifugal impeller works is reduced, a plurality of aluminum oxide ceramic blocks 3 are arranged, the end covers 301 are made of aluminum oxide ceramic, the end covers 301 correspond to the first through holes 201, the aluminum oxide ceramic is a ceramic material with aluminum oxide as a main body, the aluminum oxide ceramic has good conductivity, mechanical strength and high temperature resistance, can bear high temperature generated when the impeller works, corresponds to the first through holes 201 through the end covers 301, facilitates sound wave conduction, multiple groups of the third through holes 303 and the first through holes 201 are arranged in parallel, facilitates sound wave conduction, performs sound attenuation treatment on the sound waves, the second through holes 302 are connected with the third through holes 303 in a conduction mode, enables the sound waves to be treated for multiple times, facilitates noise reduction, and the support plates 4 are arranged, the joint of the support plate 4 and the connecting block 401 is welded with the reinforcing ribs 402, the strength, the rigidity and the torsion resistance of the joint of the support plate 4 and the connecting block 401 are enhanced by arranging the reinforcing ribs 402, and the product skew and torsional deformation caused by uneven stress due to the difference of wall thickness of the support plate 4 can be overcome, so that the strength of a joint surface is increased.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A low noise centrifugal impeller, includes wheel body (1), its characterized in that: wheel body (1) outer wall fixedly connected with blade (2), No. one through-hole (201) has all been seted up on blade (2) both sides surface, alumina ceramic piece (3) are installed to blade (2) inboard, end cover (301) are all installed on alumina ceramic piece (3) both sides surface, No. two through-holes (302) have been seted up on end cover (301) surface, No. three through-holes (303) have been seted up to end cover (301) one side, No. three through-holes (303) inner wall integrated into one piece have lug (304), high silica glass fiber post (305) are installed to lug (304) one side, alumina ceramic piece (3) one side is equipped with backup pad (4), connecting block (401) have all been welded at backup pad (4) both ends.
2. A low noise centrifugal impeller according to claim 1, wherein: the inner side of the blade (2) is of a hollow structure.
3. A low noise centrifugal impeller according to claim 1, wherein: the aluminum oxide ceramic blocks (3) are arranged in a plurality of numbers, the end covers (301) are made of aluminum oxide ceramic materials, and the end covers (301) correspond to the first through holes (201).
4. A low noise centrifugal impeller according to claim 1, wherein: and a plurality of groups of the third through holes (303) and the first through holes (201) are arranged in parallel.
5. A low noise centrifugal impeller according to claim 1, wherein: and the second through hole (302) is communicated with the third through hole (303).
6. A low noise centrifugal impeller according to claim 1, wherein: the supporting plate (4) is provided with a plurality of reinforcing ribs (402) welded at the joint of the supporting plate (4) and the connecting block (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020501484.9U CN211924558U (en) | 2020-04-08 | 2020-04-08 | Low-noise centrifugal impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020501484.9U CN211924558U (en) | 2020-04-08 | 2020-04-08 | Low-noise centrifugal impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211924558U true CN211924558U (en) | 2020-11-13 |
Family
ID=73374734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020501484.9U Expired - Fee Related CN211924558U (en) | 2020-04-08 | 2020-04-08 | Low-noise centrifugal impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211924558U (en) |
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2020
- 2020-04-08 CN CN202020501484.9U patent/CN211924558U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |