CN109854531A - A kind of impeller and its centrifugal blower of application - Google Patents
A kind of impeller and its centrifugal blower of application Download PDFInfo
- Publication number
- CN109854531A CN109854531A CN201910242456.1A CN201910242456A CN109854531A CN 109854531 A CN109854531 A CN 109854531A CN 201910242456 A CN201910242456 A CN 201910242456A CN 109854531 A CN109854531 A CN 109854531A
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- China
- Prior art keywords
- impeller
- damper
- disc
- spring
- rear trochal
- Prior art date
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- Pending
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- 238000013016 damping Methods 0.000 claims description 34
- 238000009826 distribution Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 238000013517 stratification Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
Abstract
The invention discloses a kind of impeller and its centrifugal blowers of application, impeller includes cricoid rear trochal disc and preceding wheel disc and several fan blades, rear-wheel disk center is equipped with the mounting hole for installing motor, front-wheel disk center is equipped with air inlet, several fan blades are installed between rear trochal disc and preceding wheel disc, air duct is formed between adjacent two fan blade, the outer edge in air duct forms air outlet, it is characterised in that: is equipped with damper on the rear trochal disc or/and preceding wheel disc.When impeller operation, damper makes impeller reach a dynamic equilibrium state, and be conducive to that dissipation impeller generates under the action of dust stratification, anti-aerodynamic force does not allow vibrational energy；When impeller resonates, damper can largely dissipate the vibrational energy of impeller, reduce vibration noise, impeller is avoided to destroy；Keep impeller operation more stable.
Description
Technical field:
The present invention relates to a kind of impeller and its centrifugal blowers of application.
Background technique:
Fan in existing ventilation blower, air-conditioning and electronic radiation product uses backward centrifugal fan, backward type more
Centrifugal blower includes impeller, impeller due to material is uneven or blank defect, processing and assembly in the error that generates, or even set
Timing just has the various factors such as asymmetrical geometry, makes each micro- section of the mass center of impeller can not be strictly in rotary shaft
On, and in impeller rotation, the centrifugal intertia force that multiple small particles generate cannot cancel out each other to generate Horizonal Disturbing.For
Reduce Horizonal Disturbing unfavorable factor caused by blower, the multipair impeller of designer carries out technological balance method, i.e., installs impeller
In the enterprising action balance correction of rotor dynamic balancing machine, to reduce Horizonal Disturbing when impeller rotation；Finally by the leaf of dynamic balancing
Wheel is ressembled with motor.In addition, impeller is usually combined together with other component to play a role in practical implementation,
Such as be mounted in cavity, in spiral case, filter structure it is medium.In impeller operation, flows into the gas of impeller and flowed from impeller
Gas out has with these components routinely or periodically to be impacted, while gas can also have a reversed Ground shock waves to impeller
Power, the frequency that these impacts generate causes system judder when consistent with the intrinsic frequency of impeller and its supporting system, i.e., total
Vibration phenomenon；In order to avoid the covibration that impeller generates during operation is caused damage to impeller, outlet air can be tested in engineering
Critical speed when machine resonates avoids blower from running at critical speed by debugging routine or artificial setting, and
Blower is set to move quickly through critical speed.
But dynamic balancing machine revolving speed itself is limited, and impeller also can not be effectively prevented impeller at high speeds after using technological balance
Deform and caused by imbalance.Support conditions of the impeller when doing dynamic balancing and the support conditions under actual operating conditions are not
Together, the cooperation between impeller homostasis device and the matching requirements of impeller actual operating conditions are also different, even if in dynamic balancing machine
On reach the state of high-precision balance, inevitably declined by processes, the balance quality such as transporting, reassembling using preceding, when
When in working speed, it would still be possible to generate the vibration not allowed.And impeller can change due to dust stratification etc. during operation
The dynamic equilibrium state of impeller may make impeller generate the vibration not allowed in working speed, while this reaches impeller is changed
Critical speed when resonant frequency；When impeller is just in new critical speed work, impeller will generate covibration.For
Impeller is only mounted on the enterprising action balance of dynamic balancing machine by the impeller being mounted in the structures such as cavity, spiral case, strainer, without
The influence of anti-aerodynamic force that cavity, spiral case, the structures such as strainer generate gas to impeller itself is considered, then impeller actual motion
When, it is to be run after adding the anti-aerodynamic force in this part, the anti-aerodynamic force in this part may destroy the dynamic balancing of impeller script, equally
Impeller can be made to generate the vibration not allowed, the excited frequency of impeller is changed simultaneously, increase and resonate in impeller operational process
The possibility of phenomenon.
Summary of the invention:
The object of the present invention is to provide a kind of impeller and its centrifugal blower of application, solves impeller in the prior art and running
When vibrotechnique problem occurs due to various undesirable elements cause dynamic balancing to be destroyed.
The purpose of the present invention is what is be achieved by following technical proposals.
The first purpose of the invention is to provide a kind of impeller, including cricoid rear trochal disc and preceding wheel disc and several fan blades,
Rear-wheel disk center is equipped with the mounting hole for installing motor, and front-wheel disk center is equipped with air inlet, pacifies between rear trochal disc and preceding wheel disc
Several fan blades are filled, form air duct between adjacent two fan blade, the outer edge in air duct forms air outlet, it is characterised in that: after described
Damper is installed on wheel disc or/and preceding wheel disc.
Damper described above is mounted on the bottom surface of rear trochal disc or/and the top surface of preceding wheel disc, the bottom surface of rear trochal disc and front-wheel
The top surface of disk is not in air duct.
Damper described above includes first shell, the first damping slide block and several first springs, is equipped in first shell
First cavity, the first damping slide block are located in the first cavity, and one end of the first spring is connect with the first damping slide block, the first spring
The other end connect with the inner wall of the first cavity.
The top surface of preceding wheel disc described above is equipped at least one described damper, and two are equipped in the damper on preceding wheel disc
The first damping slide block two sides are symmetrically arranged in a first spring, two the first springs.
Two the first spring radial distributions or circumferentially distributed in damper described above.
There are two the damper, the first spring of two dampers is mutually perpendicular to for the top surface installation of preceding wheel disc described above
Setting.
The bottom surface of the rear trochal disc is equipped with the damper, is set in the damper on rear trochal disc there are four the first bullet
Spring, four the first springs are centered on the first damping slide block, the surrounding that the first damping slide block is arranged in of right-angled intersection.
A second object of the present invention is to provide a kind of centrifugal blowers, including external rotor electric machine and impeller, it is characterised in that:
The impeller is impeller described above, and external rotor electric machine is mounted in mounting hole and connect with rear trochal disc, in external rotor electric machine
Periphery be covered with baffle.
Inside damper is installed between the rear trochal disc and external rotor electric machine.
Inside damper described above includes second shell, the second damping slide block and several second springs, second shell one
End is connect with the inner surface of rear trochal disc, the lateral surface connection of the second shell other end and external rotor electric machine, is equipped in second shell
Second cavity, the second damping slide block are located in the middle part of the second cavity, and one end of second spring is connect with the second damping slide block, the second bullet
The other end of spring is connect with the side wall of the second cavity.
Second spring there are four setting in inside damper described above, the setting of four second spring right-angled intersections is second
The surrounding of damping slide block.
Compared with prior art, the present invention having the effect that
1) impeller includes cricoid rear trochal disc and preceding wheel disc and several fan blades, and rear-wheel disk center is equipped with for installing electricity
The mounting hole of machine, front-wheel disk center are equipped with air inlet, install several fan blades between rear trochal disc and preceding wheel disc, between adjacent two fan blade
Air duct is formed, the outer edge in air duct forms air outlet, it is characterised in that: is equipped with resistance on the rear trochal disc or/and preceding wheel disc
Buddhist nun's device；When impeller operation, damper makes impeller reach a dynamic equilibrium state, is conducive to dissipation impeller in dust stratification, dynamic
What is generated under the action of uneven, anti-aerodynamic force does not allow vibrational energy；When impeller resonates, damper can largely dissipate
The vibrational energy of impeller reduces vibration noise, impeller is avoided to destroy；Keep impeller operation more stable.
2) further advantage elaborates in a particular embodiment.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram for the impeller that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram of another angle of impeller；
Fig. 3 is the explosive view of impeller；
Fig. 4 is the structural schematic diagram of centrifugal blower provided by Embodiment 2 of the present invention；
Fig. 5 is the explosive view of centrifugal blower；
Fig. 6 is enlarged drawing at the A of Fig. 5.
Specific embodiment:
Below by specific embodiment and in conjunction with attached drawing, the present invention is described in further detail.
Embodiment one:
As shown in Figure 1 to Figure 3, provided in this embodiment is a kind of impeller, including 2 He of cricoid rear trochal disc 1 and preceding wheel disc
Several fan blades 3,1 center of rear trochal disc are equipped with the mounting hole 12 for installing motor, and preceding 2 center of wheel disc is equipped with air inlet 24, rear-wheel
Several fan blades 3 are installed between disk 1 and preceding wheel disc 2, form air duct 31 between adjacent two fan blade 3, the outer edge in air duct is formed out
Air port 32, it is characterised in that: be equipped with damper 5 on the rear trochal disc 1 or/and preceding wheel disc 2.When impeller operation, damper 5
So that impeller is reached a dynamic equilibrium state, is conducive to dissipation impeller and is produced under the action of dust stratification, unbalance dynamic, anti-aerodynamic force
Raw does not allow vibrational energy；When impeller resonates, damper 5 can largely dissipate the vibrational energy of impeller, reduce vibration
Noise avoids impeller from destroying；Keep impeller operation more stable.
Damper 5 described above is mounted on the bottom surface 11 of rear trochal disc 1 or/and the top surface 21 of preceding wheel disc 2, the bottom of rear trochal disc 1
Face 11 and the top surface 21 of preceding wheel disc 2 are not in air duct 31.It does not have a negative impact to the gas of impeller internal.
Above-mentioned damper 5 includes first shell 53, the first damping slide block 51 and several first springs 52, in first shell 53
Equipped with the first cavity 54, the first damping slide block 51 is located in the first cavity 54, one end of the first spring 52 and the first damping slide block
51 connections, the other end of the first spring 52 are connect with the inner wall 55 of the first cavity 54.5 structure of damper is simple, easy for installation.
The top surface 21 of preceding wheel disc 2 described above is equipped at least one described damper 5, in the damper 5 on preceding wheel disc 2
If two the first springs 52 are symmetrically arranged in 51 two sides of the first damping slide block there are two the first spring 52.
Two the first spring 52 radial distributions or circumferentially distributed in damper 5 described above.It can pacify according to the actual situation
Damper is filled, flexibly and easily.
There are two the damper 5, the first springs 52 of two dampers 5 for the installation of top surface 21 of preceding wheel disc 2 described above
It is arranged in a mutually vertical manner.Two dampers 5 are adjustable the interference of different directions, and effect is more preferable.
The bottom surface 11 of the rear trochal disc 1 is equipped with the damper 5, set in the damper 5 on rear trochal disc 1 there are four
First spring 52, four the first springs 52 are centered on the first damping slide block 51, and the setting of right-angled intersection is in the first damping slide block
51 surrounding.
The quantity and installation site of damper 5 can determine according to the actual situation.
The first spring 52 of suitable spring ratio how is selected to be derived and solved damper 5 below.
Most widely used damper model in engineering: being usually one directly proportional to vibration velocity size, with vibration velocity
Opposite power, the model are known as viscous damping model.It is represented by the following formula:
WhereinIndicate damping force,Indicate the movement velocity of oscillator, c indicates the constant of damping size, referred to as damping system
Number, international unit N*m/s.
Ideal spring-damper oscillator system, stress meet formula:
WhereinIndicating elastic force, κ is the progress coefficient of spring,Deviate the displacement of equilbrium position for oscillator.
Assuming that oscillator utilizes Newton's second law no longer by other external forces:
WhereinFor acceleration.
So have:
The equation is system vibration equation, is displacementSecond order ordinary differential equation about time t.
Equation is changed to following form:
Then equation is solved, following two new parameters are obtained
Wherein ωnFor the intrinsic frequency of system, ζ is damping ratio.
Excitation system makes it be in resonance state, records resonant frequency ω when resonance staten, select quality for the cunning of m
Block brings above formula into, and κ is calculated, that is, the spring of corresponding spring ratio may be selected.
Embodiment two:
As shown in Figures 4 to 6, provided in this embodiment is a kind of including external rotor electric machine 8 and impeller 9, it is characterised in that:
The impeller 9 is impeller described above, and external rotor electric machine 8 is mounted in mounting hole 12 and connect with rear trochal disc 1, in outer rotor
The periphery of motor 8 is covered with baffle 4.By being improved to blade wheel structure, improves the dynamic steady of impeller, blower is made to operate surely
It is fixed.
Inside damper 6 is installed between the rear trochal disc 1 and external rotor electric machine 8.Inside damper 6 runs impeller 9
Stablize, the vibration of impeller 9 is avoided to generate negative interference to external rotor electric machine 8, reduces motor noise.
Inside damper 6 described above include second shell 63, the second damping slide block 61 and several second springs 62, second
64 one end of shell is connect with the inner surface 15 of rear trochal disc 1, and the lateral surface 81 of 63 other end of second shell and external rotor electric machine 8 connects
It connecing, the second cavity 64 is equipped in second shell 64, the second damping slide block 61 is located in the middle part of the second cavity 64, and the one of second spring 62
End is connect with the second damping slide block 61, and the other end of second spring 62 is connect with the side wall 65 of the second cavity 64.
Second spring 62 there are four being set in inside damper 6 described above, the setting of four 62 right-angled intersections of second spring
In the surrounding of the second damping slide block 61.
Above embodiments are better embodiment of the invention, and embodiments of the present invention are not limited thereto, other are any
Made changes, modifications, substitutions, combinations, simplifications without departing from the spirit and principles of the present invention are equivalent displacement side
Formula is included within the scope of the present invention.
Claims (11)
1. a kind of impeller, including cricoid rear trochal disc (1) and preceding wheel disc (2) and several fan blades (3), rear trochal disc (1) center are equipped with
For installing the mounting hole (12) of motor, preceding wheel disc (2) center is equipped with air inlet (24), between rear trochal disc (1) and preceding wheel disc (2)
It installs several fan blades (3), forms air duct (31) between adjacent two fan blade (3), the outer edge in air duct forms air outlet (32),
It is characterized in that: several dampers (5) is installed on the rear trochal disc (1) or/and preceding wheel disc (2).
2. a kind of impeller according to claim 1, it is characterised in that: the damper (5) is mounted on the bottom of rear trochal disc (1)
Face (11) or/and the top surface (21) of preceding wheel disc (2), the bottom surface (11) of rear trochal disc (1) are not at the top surface (21) of preceding wheel disc (2)
In air duct (31).
3. a kind of impeller according to claim 2, it is characterised in that: the damper (5) includes first shell (53),
One damping slide block (51) and several first springs (52), first shell (53) is interior to be equipped with the first cavity (54), the first damping slide block
(51) it is located in the first cavity (54), one end of the first spring (52) is connect with the first damping slide block (51), the first spring (52)
The other end connect with the inner wall (55) of the first cavity (54).
4. a kind of impeller according to claim 3, it is characterised in that: the top surface (21) of the preceding wheel disc (2) be equipped with to
A few damper (5), sets that there are two the first spring (52), two the first springs in the damper (5) on preceding wheel disc (2)
(52) symmetrical to be arranged in the first damping slide block (51) two sides.
5. a kind of impeller according to claim 4, it is characterised in that: two the first springs in the damper (5)
(52) radial distribution or circumferentially distributed.
6. a kind of impeller according to claim 5, it is characterised in that: the top surface (21) of the preceding wheel disc (2) is equipped with two
The first spring (52) of a damper (5), two dampers (5) is arranged in a mutually vertical manner.
7. a kind of impeller according to any one of claim 3 to 6, it is characterised in that: the bottom surface of the rear trochal disc (1)
(11) damper (5) is installed, is set in the damper (5) on rear trochal disc (1) there are four the first spring (52), four
First spring (52) is centered on the first damping slide block (51), the surrounding of the setting of right-angled intersection in the first damping slide block (51).
8. a kind of centrifugal blower, including external rotor electric machine (8) and impeller (9), it is characterised in that: the impeller (9) is wanted for right
Impeller described in asking any one of 1 to 7, it is inner and connect with rear trochal disc (1) that external rotor electric machine (8) is mounted on mounting hole (12),
Baffle (4) are covered in the periphery of external rotor electric machine (8).
9. a kind of centrifugal blower according to claim 8, it is characterised in that: the rear trochal disc (1) and external rotor electric machine (8)
Between inside damper (6) are installed.
10. a kind of centrifugal blower according to claim 9, it is characterised in that: the inside damper (6) includes second shell
Body (63), the second damping slide block (61) and several second springs (62), the inner surface of second shell (64) one end and rear trochal disc (1)
(15) it connects, second shell (63) other end is connect with the lateral surface (81) of external rotor electric machine (8), is equipped in second shell (64)
Second cavity (64), the second damping slide block (61) are located in the middle part of the second cavity (64), one end of second spring (62) and the second resistance
Buddhist nun's sliding block (61) connection, the other end of second spring (62) are connect with the side wall (65) of the second cavity (64).
11. a kind of centrifugal blower according to claim 10, it is characterised in that: be equipped with four in the inside damper (6)
A second spring (62), the surrounding of the settings of four second spring (62) right-angled intersections in the second damping slide block (61).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242456.1A CN109854531A (en) | 2019-03-28 | 2019-03-28 | A kind of impeller and its centrifugal blower of application |
| PCT/CN2019/104620 WO2020192023A1 (en) | 2019-03-28 | 2019-09-06 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242456.1A CN109854531A (en) | 2019-03-28 | 2019-03-28 | A kind of impeller and its centrifugal blower of application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854531A true CN109854531A (en) | 2019-06-07 |
Family
ID=66902235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910242456.1A Pending CN109854531A (en) | 2019-03-28 | 2019-03-28 | A kind of impeller and its centrifugal blower of application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192023A1 (en) * | 2019-03-28 | 2020-10-01 | 中山宜必思科技有限公司 | Centrifugal fan |
| WO2021169197A1 (en) * | 2020-02-29 | 2021-09-02 | 华为技术有限公司 | Centrifugal fan and air conditioning device |
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| KR101819127B1 (en) * | 2016-10-26 | 2018-03-02 | 주식회사대진브로아 | The centrifugal fan |
| CN210068559U (en) * | 2019-03-28 | 2020-02-14 | 中山宜必思科技有限公司 | Impeller and centrifugal fan applying same |
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2019
- 2019-03-28 CN CN201910242456.1A patent/CN109854531A/en active Pending
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| CN201437775U (en) * | 2009-07-01 | 2010-04-14 | 松下·万宝(广州)压缩机有限公司 | rotary compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192023A1 (en) * | 2019-03-28 | 2020-10-01 | 中山宜必思科技有限公司 | Centrifugal fan |
| WO2021169197A1 (en) * | 2020-02-29 | 2021-09-02 | 华为技术有限公司 | Centrifugal fan and air conditioning device |
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