CN114962323A - Low-vibration low-noise centrifugal fan adopting gas bearing - Google Patents

Low-vibration low-noise centrifugal fan adopting gas bearing Download PDF

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Publication number
CN114962323A
CN114962323A CN202210655396.8A CN202210655396A CN114962323A CN 114962323 A CN114962323 A CN 114962323A CN 202210655396 A CN202210655396 A CN 202210655396A CN 114962323 A CN114962323 A CN 114962323A
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CN
China
Prior art keywords
base
low
damping
vibration
motor
Prior art date
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Pending
Application number
CN202210655396.8A
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Chinese (zh)
Inventor
常超
陈启明
孙丽娟
王枭
王弼
于跃平
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HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD
Hefei General Machinery Research Institute Co Ltd
Original Assignee
HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD
Hefei General Machinery Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD, Hefei General Machinery Research Institute Co Ltd filed Critical HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD
Priority to CN202210655396.8A priority Critical patent/CN114962323A/en
Publication of CN114962323A publication Critical patent/CN114962323A/en
Pending legal-status Critical Current

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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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a low-vibration low-noise centrifugal fan adopting a gas bearing.A vane wheel adopts a closed structure and comprises long vanes and short vanes which are uniformly distributed and staggered; two annular cavities are formed between the pressure plate and the volute casing of the casing and between the front cover plate and the collector, and damping materials or sound absorption materials are filled in the annular cavities; a gas bearing is adopted in the motor; the base comprises an upper base and a lower base which are connected with each other; the upper base is connected with a machine leg of the motor, and a damping plate is arranged in the upper base; a plurality of base cavities are formed in the lower base, and damping materials are filled in the base cavities. The invention blocks the transmission path of vibration and noise by reducing the vibration noise source, thereby achieving the effects of low vibration and low noise.

Description

Low-vibration low-noise centrifugal fan adopting gas bearing
Technical Field
The invention relates to the technical field of fans, in particular to a low-vibration low-noise centrifugal fan adopting a gas bearing.
Background
The centrifugal fan is a large-scale and wide-range mechanical device and is widely applied to the industrial fields of energy power, petrochemical industry, metallurgy and the like and various warships and boats in the military industry. For various ship ventilation air-conditioning systems, the most main technical index requirement of the centrifugal fan is that the vibration and the noise are low. The impeller of the centrifugal fan is a rotating part, the impeller vibrates due to the rotating centrifugal force and airflow force caused by eccentricity, the fan shell belongs to a thin-wall container structure, the pressure pulsation formed by interaction of gas flow and the shell wall surface enables the shell to generate large vibration and radiate noise, the work and rest of personnel are influenced, the service life of equipment is prolonged, and the sound stealth of ships is influenced by the vibration transmitted to the equipment mounting bottom feet.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the low-vibration low-noise centrifugal fan adopting the gas bearing, which has the characteristics of low vibration and low noise.
In order to achieve the purpose, the invention adopts the following technical scheme that:
a low-vibration low-noise centrifugal fan adopting a gas bearing comprises an impeller, a shell, a motor and a base; the impeller is characterized in that the impeller adopts a closed structure and comprises long blades and short blades which are uniformly distributed and staggered; two annular cavities are formed between the pressure plate and the volute casing of the machine shell and between the front cover plate and the collector; the annular cavity is filled with damping materials or sound absorption materials; a gas bearing is adopted in the motor; the base comprises an upper base and a lower base which are connected with each other; the upper base is connected with a machine leg of the motor, and a damping plate is arranged in the upper base; a plurality of base cavities are formed in the lower base, and damping materials are filled in the base cavities.
Preferably, the radial bearing and the thrust bearing in the motor both adopt gas bearings, wherein the radial bearing is used for suspending a rotating shaft of the motor; the thrust bearing is used for limiting the axial movement of the rotating shaft of the motor during rotation.
Preferably, the upper base is composed of a plurality of layers of damping units, and each damping unit is composed of a base plate and a damping plate positioned at the bottom of the base plate; the damping plate of the bottom damping unit is connected with the upper cover plate of the lower base; the base plate of the top-layer damping unit is connected with a machine leg of the motor through a first bolt; the upper base and the lower base are connected through a second bolt, and the lower base is fixedly connected with at least part of the damping units in the upper base.
Preferably, the damping plate is a rubber pad.
Preferably, the damping material is ceramic particles.
Preferably, the sound absorption material is sound absorption cotton.
Preferably, the length ratio between the long blade and the short blade is 2: 1.
Preferably, the outlet diameters of the long and short vanes are the same, and the inlet diameter of the short vane is 1.5 times the inlet diameter of the long vane.
The invention has the advantages that:
(1) the invention can reduce the vibration noise source and block the transmission path of vibration and noise, thereby achieving the effect of low vibration noise.
(2) The impeller of the invention adopts a closed structure, thus improving the efficiency of the impeller. The impeller adopts the long and short blades, and the area of the blade inlet is divided into two parts, so that the airflow pulsation generated when airflow enters the blades is reduced, and the airflow noise is reduced. In addition, local strengthening treatment is respectively carried out at the inlet end and the outlet end of the impeller, so that the strength and the rigidity of the whole structure are improved, and the vibration generated by the impeller is reduced.
(3) The annular cavity of the shell can be filled with damping materials, so that the vibration generated by the shell is reduced; the annular cavity can also be filled with sound absorption materials, so that the radiation noise of the surface of the machine shell is reduced.
(4) The impeller is vibrated by the rotating centrifugal force and airflow force caused by the rotating eccentricity of the impeller, but the whole rotor formed by the rotating shaft and the impeller is in a suspension state by adopting the gas bearing, and the vibration generated by the impeller cannot be transmitted to the motor and a shell part and further cannot be transmitted to the ground or other foundations through the base because the whole rotor is in the suspension state. For the centrifugal fan, the vibration of the machine leg is an important index, and the path of the vibration of the impeller transmitted to the machine leg is completely cut off by adopting the gas bearing, so that the vibration of the ground leg is greatly reduced.
(5) The motor of the invention adopts the gas bearing, the rotor is not contacted with the bearing when rotating, and the noise caused by metal contact friction is reduced, so that the mechanical noise of the rotor part is also greatly reduced.
(6) The fan base of the invention adopts a specially designed base, the upper base is composed of a plurality of layers of damping units, and a plurality of base cavities filled with damping materials are arranged in the lower base. The existence of damping plate for be flexonics between upper and lower base, do not have rigid connection, because do not have rigid connection between upper and lower base, the vibration of fan can only pass through the damping plate transmission, and the damping plate itself possesses the damping function, therefore most fan vibration is absorbed by the damping plate, and the fan vibration of surplus part is absorbed by the damping material who fills in the base again, makes the vibration that transmits the base bottom weakened by a wide margin.
Drawings
Fig. 1 is a structural view of a low vibration and low noise centrifugal fan using a gas bearing according to the present invention.
Fig. 2 is a structural view of an impeller of the present invention.
Fig. 3 is a structure view of the cabinet of the present invention.
Fig. 4 is a structural view of a motor of the present invention.
Fig. 5 is a structural view of a base of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the centrifugal fan mainly comprises an impeller 1, a casing 2, a motor 3 and a base 4, wherein a rotating shaft 32 of the motor 3 is connected with the impeller 1 to drive the impeller 1 to rotate, the impeller 1 is positioned in the casing 2, the casing 2 is connected with the motor 3 through a flange, a foot of the motor 3 is connected with the base 4 through a bolt, the base 4 is connected with the ground or other bases through a bolt, noise of the unit mainly radiates to the periphery through the outer surfaces of the motor 3 and the casing 2, and vibration of the unit is transmitted to the ground through the bottom surface of the base 4.
The invention relates to a low-vibration low-noise centrifugal fan adopting a gas bearing, which realizes the vibration and noise reduction effects by improving the structure of the existing centrifugal fan, and the structure is as follows:
as shown in fig. 2, the impeller 1 of the present invention adopts a closed structure, thereby improving the efficiency of the impeller. Local strengthening treatment is respectively carried out at the inlet end 13 and the outlet end 14 of the impeller 1, namely, the thickness of the front disc is locally increased at the inlet and the outlet, so that the inlet and the outlet form two circular rings, the strength and the rigidity of the whole structure are improved, and the vibration generated by the impeller is reduced. Impeller 1 adopts long and short blade, includes long blade 11 and short blade 12 promptly, and the length ratio is 2 between long blade 11 and the short blade 12: 1, the quantity of long and short blade is 9, and long blade 11 and short blade 12 equipartition staggered arrangement set up between the preceding rim plate of impeller 1 and back rim plate, and the export diameter of long blade 11 and short blade 12 is the same, and the import diameter of short blade 12 is 1.5 times of the import diameter of long blade 11.
When the air flow enters the impeller, the air flow can impact on the edge of the inlet of the blade due to the thickness of the blade, so that the air flow pulsation is caused, and if the blade is not short, the inlet and outlet space of the impeller can be suddenly reduced, so that the large air flow pulsation is caused. However, because of the long and short blades, the process of reducing the space when the airflow enters the impeller is divided into two parts, namely the inlet of the long blade and the inlet of the short blade, so that the airflow has less pulsation and low noise. The invention divides the area of the blade inlet into two parts, reduces the airflow pulsation generated when the airflow enters the blade, thereby reducing the airflow noise.
As shown in fig. 3, the casing 2 of the present invention includes a pressure plate 21, a volute 22, a collector 23, and a front cover plate 24, and two annular cavities, i.e., a first annular cavity 25 and a second annular cavity 26, are formed between the pressure plate 21 and the volute 22 and between the front cover plate 24 and the collector 23. The annular cavity can be filled with damping materials to reduce the vibration generated by the shell 2; the annular cavity can also be filled with sound absorption materials to reduce the radiation noise on the surface of the machine shell 2. The sound absorption material can adopt sound absorption cotton, and the damping material can adopt ceramic particles.
As shown in fig. 4, the motor 3 of the present invention employs a gas bearing 31, wherein a radial bearing and a thrust bearing both employ the gas bearing 31, and the radial bearing is used for suspending a rotating shaft 32 of the motor 3; the thrust bearing serves to restrict axial play of the rotating shaft 32 of the motor 3 when rotating. When rotating, the whole rotor formed by the rotating shaft 32 and the impeller 1 is in a suspension state. The impeller 1 vibrates due to the centrifugal force caused by the rotation eccentricity of the impeller 1 and the airflow force, but the vibration generated by the impeller 1 cannot be transmitted to the motor 3 and the housing 2, and further cannot be transmitted to the ground or other foundations through the base 4 because the whole rotor of the present invention is in a suspension state. For the centrifugal fan, the vibration of the machine leg is an important index, and the path of the vibration of the impeller 1 transmitted to the machine leg is completely cut off by adopting the gas bearing 31, so that the vibration of the lower leg is greatly reduced.
In addition, with the gas bearing 31, the rotor does not contact the bearing during rotation, so that noise caused by metal contact friction is reduced, and mechanical noise of the rotor part is greatly reduced.
As shown in fig. 5, the fan base of the present invention uses a specially designed base 4, and the base 4 is divided into an upper base 41 and a lower base 42. The upper base 41 is composed of a plurality of layers of damping units, and each damping unit is composed of a base plate 412 and a damping plate 411 positioned at the bottom of the base plate; the damping plate 411 of the bottom layer damping unit is connected with the upper cover plate of the lower base 42; the backing plate 412 of the top damping unit is connected with the motor foot through a first bolt 43; the upper base 41 and the lower base 42 are connected through a second bolt 44, and the lower base 42 is fixedly connected with at least part of the damping units in the upper base 41; due to the existence of the damping plate, the upper base and the lower base are flexibly connected without rigid connection; the lower base 42 has a plurality of base cavities 421 therein, and the base cavities 421 are filled with damping material. The damping material may be ceramic particles.
Because there is not rigid connection between upper and lower base, the vibration of fan 3 can only be transmitted through damping plate 411, and damping plate 411 adopts the rubber pad that itself possesses the damping function, therefore the vibration of most fan is absorbed by damping plate 411, and the remaining part is absorbed by the damping material who fills in lower base 42 again, and the vibration of transmitting to the base bottom is weakened by a wide margin.
After the structure of the existing centrifugal fan is improved, the vibration value and the noise value of the centrifugal fan are greatly reduced compared with the traditional fan with the same performance, the data comparison between the traditional fan with the same flow pressure and the fan of the invention is listed in the following table 1, and the noise value of the centrifugal fan of the invention is reduced by 15.4dB (A), the vibration intensity is reduced by 1mm/s, and the acceleration of a machine leg is reduced by 25.55dB in view of the data comparison.
TABLE 1
Blower type Traditional centrifugal fan The invention relates to a low-vibration low-noise fan
Flow rate (m) 3 /h) 800 800
Static pressure rise (Pa) ≥6000 ≥6000
Noise (dB (A)) 74.0 58.6
Vibration intensity (mm/s) 1.2 0.2
Acceleration of machine leg (dB) 122.65(10Hz-8kHz) 97.1(10Hz-8kHz)
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A low-vibration low-noise centrifugal fan adopting a gas bearing comprises an impeller (1), a casing (2), a motor (3) and a base (4); the impeller is characterized in that the impeller (1) adopts a closed structure and comprises long blades (11) and short blades (12) which are uniformly distributed and staggered, wherein the rotating shaft (32) of the motor (3) is connected with the impeller (1), the impeller (1) is positioned in the casing (2), the casing (2) is connected with the shell of the motor (3), and the machine foot of the motor (3) is connected with the base (4); two annular cavities are formed between a pressure plate (21) and a volute (22) of the casing (2) and between a front cover plate (24) and a collector (23); the annular cavity is filled with damping materials or sound absorption materials; the base (4) comprises an upper base (41) and a lower base (42) which are connected with each other; wherein, the upper base (41) is connected with the feet of the motor (3), and a damping plate (411) is arranged in the upper base (41); a plurality of base cavity (421) have been seted up to the inside of lower base (42), fill damping material in base cavity (421).
2. A low vibration and low noise centrifugal fan using gas bearings according to claim 1, wherein the radial bearings and the thrust bearings in the motor (3) are each gas bearings (31), wherein the radial bearings are used for suspending the rotating shaft (32) of the motor (3); the thrust bearing is used for limiting the axial movement of the rotating shaft (32) of the motor (32) during rotation.
3. A low vibration and low noise centrifugal fan using gas bearing as claimed in claim 1, wherein said upper base (41) is composed of several layers of damping units, the damping units are composed of a base plate (412) and a damping plate (411) at the bottom of the base plate; the damping plate (411) of the bottom layer damping unit is connected with the upper cover plate of the lower base (42); a base plate (412) of the top-layer damping unit is connected with a machine leg of the motor (3) through a first bolt (43); the upper base (41) and the lower base (42) are connected through a second bolt (44), and the lower base (42) is fixedly connected with at least part of the damping units in the upper base (41).
4. A low vibration and low noise centrifugal fan using gas bearing as claimed in claim 1, wherein said damping plate (411) is rubber pad.
5. A low vibration, low noise centrifugal fan using a gas bearing as claimed in claim 1, wherein said damping material is ceramic particles.
6. The centrifugal fan with low vibration and low noise using gas bearing as claimed in claim 1, wherein said sound absorption material is sound absorption cotton.
7. A low vibration and low noise centrifugal fan using gas bearings according to claim 1, wherein the length ratio between the long blades (11) and the short blades (12) is 2: 1.
8. A low vibration and low noise centrifugal fan using gas bearings according to claim 1, wherein the outlet diameters of the long blade (11) and the short blade (12) are the same, and the inlet diameter of the short blade (12) is 1.5 times the inlet diameter of the long blade (11).
CN202210655396.8A 2022-06-10 2022-06-10 Low-vibration low-noise centrifugal fan adopting gas bearing Pending CN114962323A (en)

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Application Number Priority Date Filing Date Title
CN202210655396.8A CN114962323A (en) 2022-06-10 2022-06-10 Low-vibration low-noise centrifugal fan adopting gas bearing

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Application Number Priority Date Filing Date Title
CN202210655396.8A CN114962323A (en) 2022-06-10 2022-06-10 Low-vibration low-noise centrifugal fan adopting gas bearing

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128174A (en) * 2011-04-02 2011-07-20 山东大学 Spiral-flow type blockage-free energy-efficient centrifugal fan
CN103498818A (en) * 2013-09-06 2014-01-08 乐金空调(山东)有限公司 Silencer of centrifugal compressor
US20140271132A1 (en) * 2013-03-15 2014-09-18 Kohler Co. Noise suppression system
CN107339264A (en) * 2017-03-15 2017-11-10 宁波方太厨具有限公司 A kind of blower fan system auxiliary denoising device of single air-inlet range hood
CN107654398A (en) * 2017-10-23 2018-02-02 上海瑞晨环保科技有限公司 A kind of noise elimination high-speed centrifugal fan
CN108953193A (en) * 2018-08-22 2018-12-07 江苏冠愉电机科技有限公司 A kind of noise-reduction type fiberglass blower fan
CN111425414A (en) * 2020-02-27 2020-07-17 合肥通用机械研究院有限公司 Special gas high-speed centrifugal compressor adopting gas suspension bearing
CN112467932A (en) * 2020-10-29 2021-03-09 常州工学院 High-speed fan with hybrid support of air bearing and magnetic bearing
CN114439769A (en) * 2022-03-09 2022-05-06 合肥通用机械研究院有限公司 High damping vibration attenuation base that fan was used

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128174A (en) * 2011-04-02 2011-07-20 山东大学 Spiral-flow type blockage-free energy-efficient centrifugal fan
US20140271132A1 (en) * 2013-03-15 2014-09-18 Kohler Co. Noise suppression system
CN103498818A (en) * 2013-09-06 2014-01-08 乐金空调(山东)有限公司 Silencer of centrifugal compressor
CN107339264A (en) * 2017-03-15 2017-11-10 宁波方太厨具有限公司 A kind of blower fan system auxiliary denoising device of single air-inlet range hood
CN107654398A (en) * 2017-10-23 2018-02-02 上海瑞晨环保科技有限公司 A kind of noise elimination high-speed centrifugal fan
CN108953193A (en) * 2018-08-22 2018-12-07 江苏冠愉电机科技有限公司 A kind of noise-reduction type fiberglass blower fan
CN111425414A (en) * 2020-02-27 2020-07-17 合肥通用机械研究院有限公司 Special gas high-speed centrifugal compressor adopting gas suspension bearing
CN112467932A (en) * 2020-10-29 2021-03-09 常州工学院 High-speed fan with hybrid support of air bearing and magnetic bearing
CN114439769A (en) * 2022-03-09 2022-05-06 合肥通用机械研究院有限公司 High damping vibration attenuation base that fan was used

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