CN111577665A - Vertical installation axial fan of big amount of wind low noise for utility tunnel - Google Patents

Vertical installation axial fan of big amount of wind low noise for utility tunnel Download PDF

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Publication number
CN111577665A
CN111577665A CN202010542408.7A CN202010542408A CN111577665A CN 111577665 A CN111577665 A CN 111577665A CN 202010542408 A CN202010542408 A CN 202010542408A CN 111577665 A CN111577665 A CN 111577665A
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CN
China
Prior art keywords
air
noise
guide vane
air duct
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010542408.7A
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Chinese (zh)
Inventor
杜菲
石小兵
闵云
杨陈惠
陈丽萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jinxian Electromechanical Technology Co ltd
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Shanghai Jinxian Electromechanical Technology Co ltd
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Publication date
Application filed by Shanghai Jinxian Electromechanical Technology Co ltd filed Critical Shanghai Jinxian Electromechanical Technology Co ltd
Priority to CN202010542408.7A priority Critical patent/CN111577665A/en
Publication of CN111577665A publication Critical patent/CN111577665A/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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • 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
    • F04D29/667—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
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a large-air-volume low-noise vertical installation axial flow fan for a comprehensive pipe gallery, which comprises an air duct, a motor, a hub and blades, wherein the motor is fixedly connected to the inner axle center of the air duct through a connecting plate, the hub is fixedly connected to an output shaft of the motor, the blades are fixedly connected to the side wall of the hub, the axial flow fan also comprises an air outlet flow-equalizing noise-eliminating guide vane, the air outlet flow-equalizing noise-eliminating guide vane is positioned at one end of the air duct, the air outlet flow-equalizing noise-eliminating guide vane is arranged at one end of the air duct, air flow generated in the fan flows out of the air duct and firstly flows through the air outlet flow-equalizing noise-eliminating guide vane, and the component is a special noise eliminator which is custom; the main materials are galvanized steel sheets, galvanized silencing porous plates and silencing cotton materials; the flow equalizing guide vane is made of a galvanized silencing porous plate and silencing cotton materials, and can efficiently reduce the sound power noise of flowing air flow.

Description

Vertical installation axial fan of big amount of wind low noise for utility tunnel
Technical Field
The invention relates to the technical field of a ventilation system of a comprehensive pipe rack, in particular to a large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack.
Background
The ventilation system of utility tunnel is the indispensable safeguard measure of equipment operation safety and operation personnel safety in the piping lane, and ventilation system need dispose a large amount of axial fan. Because utility tunnel passes in city centre ground, fan noise needs strict control, consequently, the fan of the little amount of wind is usually selected for use to present pipe gallery, and is a large number. Under the general condition, according to utility tunnel's civil engineering structure, all fans of ventilation system need install in the top wind well of piping lane, move towards "word" along the piping lane top and arrange, adopt vertical mounting means. The large number of fans enables civil engineering investment and equipment investment scale of the ventilation system to be large, operation cost is high, and maintenance workload is large.
If the performances of all the fans are integrated and are completed by one fan, the equipment investment and the civil engineering installation cost can be greatly reduced, the operating efficiency of the fan can be improved, the energy-saving operation of a ventilation system is realized, and the equipment maintenance work can be reduced. At present, the diameter of an impeller of an axial flow fan with large air volume is usually more than 2000mm, but the running noise is large, the noise at a distance of 1 m away from an air outlet of the fan is usually more than 90dB (A), even if a silencer is adopted, the silencing quantity can be reduced by 12-15dB (A) at most due to the limitation of installation space, and the requirement of environmental noise below 65dB (A) cannot be met.
The large-air-volume low-noise vertical axial flow fan for the comprehensive pipe gallery is an axial flow fan which combines a fan body structure with a noise elimination structure, adopts a large-size impeller and a specially-made low-rotating-speed motor made of special materials, and controls the noise at the distance of 1 m from an air outlet of the fan to be below 70dB (A) under the condition of not adopting a silencer.
Disclosure of Invention
The invention aims to provide a large-air-volume low-noise vertical axial flow fan for a comprehensive pipe gallery, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: utility tunnel is with vertical installation axial fan of big amount of wind low noise, including dryer, motor, wheel hub and blade, the motor passes through connecting plate fixed connection and is in the inside axle center department of dryer, wheel hub fixed connection be in on the output shaft of motor, blade fixed connection be in on wheel hub's the lateral wall, still including the air outlet noise elimination stator that flow equalizes, the air outlet noise elimination stator that flow equalizes is located the one end of dryer.
Preferably, the air outlet flow equalizing noise elimination guide vane comprises a mounting ring and a flow equalizing guide vane, and the flow equalizing guide vane is uniformly distributed on the outer surface of the mounting ring.
Preferably, the flow equalizing guide vane is made of a galvanized silencing porous plate, and the mounting ring is made of a galvanized steel plate.
Preferably, the outer surface of the flow equalizing guide vane is wrapped with noise reduction cotton.
Preferably, the outer surface of the air duct is provided with a plurality of mounting feet, and the mounting feet are respectively provided with an elastic piece.
Preferably, the blade is synthesized by high-strength glass fiber and resin, and the blade is of a high-efficiency wing profile.
Preferably, the hub and the corresponding blade are connected by bolts.
Preferably, the inner wall of the air duct is provided with silencing cotton.
Preferably, protective nets are respectively arranged at two ends of the air duct.
Compared with the prior art, the invention has the beneficial effects that: the axial flow fan is vertically installed in a large-air-volume low-noise mode for the comprehensive pipe gallery, an air outlet flow equalizing noise elimination guide vane is arranged at one end of an air cylinder, airflow generated inside the fan flows out of the air cylinder and firstly flows through the air outlet flow equalizing noise elimination guide vane, and the component is a special noise elimination device which is custom designed according to the flow and pressure energy level of aerodynamic performance; the main materials are galvanized steel sheets, galvanized silencing porous plates and silencing cotton materials; the flow equalizing guide vane is made of a galvanized silencing porous plate and silencing cotton material, so that the sound power noise of flowing air flow can be efficiently reduced; the installation angle of the flow equalizing guide vane is matched with the air flow speed angle of the fan, and the device can straighten the high-speed air flow pressurized out from the impeller, thereby greatly reducing the turbulence noise.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic top cross-sectional view of the present invention;
FIG. 3 is a schematic top view of the flow equalizing noise elimination guide vane of the air outlet of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1;
fig. 5 is an enlarged schematic view of B in fig. 1.
In the figure: the air-conditioning system comprises a wind barrel 1, a motor 2, a hub 3, blades 4, an air outlet flow equalizing noise elimination guide vane 5, a mounting ring 501, a flow equalizing guide vane 502, a mounting foot 6, an elastic piece 7 and a protective net 8.
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.
Referring to fig. 1-5, the present invention provides a technical solution: the large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe gallery comprises an air duct 1, a motor 2, two connecting plates 5 and two blades 4, as shown in figure 1, wherein the motor 2 is fixedly connected to the inner axle center of the air duct 1 through the connecting plates 5, the connecting plates 5 are fixedly connected to the inner side wall of the air duct 1 through bolts, the motor 2 is positioned between the two connecting plates 5, the motor 2 is a specially-made low-rotation-speed and F-level motor and is vertically installed, and can bear an increased axial load, the hub 3 is fixedly connected to an output shaft of the motor 2, the blades 4 are fixedly connected to the side wall of the hub 3, the hub 3 is made of Q235 carbon steel, strength and toughness are ensured, as shown in figure 2, the number of the blades 4 is 3, and further comprises air outlet flow equalizing silencing guide vanes 5, the air outlet flow equalizing silencing guide vanes 5 are positioned at one end of the air duct 1, and the fan supplies air from one end of the air outlet flow equalizing noise elimination guide vane 5.
Particularly, as shown in fig. 3, the air outlet flow equalizing noise reduction guide vane 5 comprises an installation ring 501 and a flow equalizing guide vane 502, the installation ring 501 is annular, the installation ring 501 is coaxial with the air duct 1, the flow equalizing guide vane 502 is uniformly distributed on the outer surface of the installation ring 501, one end of the flow equalizing guide vane 502 is fixedly connected with the outer surface of the installation ring 501, the other end of the flow equalizing guide vane 502 is fixedly connected with the inner surface of the air duct 1, the end surface of the flow equalizing guide vane 502 is arc-shaped, the flow equalizing guide vane 502 is installed at a certain angle between the installation rings 501, the installation angle of the flow equalizing guide vane 502 is matched with the air flow velocity angle of the blade 4, and the device can manage the high-speed airflow pressurized out from the inside of the air duct 1, greatly reduce the turbulent noise, and achieve the purpose of noise reduction.
Particularly, the stator 502 that flow equalizes adopts the galvanized steel sheet to make, collar 501 adopts the galvanized steel sheet to make, adopts the galvanized steel sheet to make the air current of flowing through flow into inside the hole on its surface, the flow time of extension air, the vibrations that absorb the air simultaneously and produce, thereby further fall and make an uproar, two collar 501 adopts the galvanized steel sheet to make, thereby has guaranteed its intensity, prevents that the device from taking place to warp in the course of the work, thereby influences its effect of making an uproar that falls.
Specifically, the outer surface of the flow equalizing guide vane 502 is wrapped with noise reduction cotton, also called sound absorption cotton, is a rolled/sheet material processed by a plurality of processes from single or a plurality of different fibers, widely used is bi-component noise reduction cotton, polyester sound absorption cotton is one of the two, 100% polyester fiber is formed by high-technology hot pressing and cocoon cotton shape, the sound absorption coefficient reaches 0.94 within the noise range of 125-4000 HZ, the sound absorption material is soft and rich in natural material texture experience, various optional modern color systems, simple and convenient decorative modeling and good flame retardance, meanwhile, the material has good physical stability, is determined not to expand and shrink due to changes of temperature and temperature, is soft, smooth, natural in texture and high in elasticity, cannot break under the impact of huge external force, and is a good noise reduction material.
Specifically, as shown in fig. 1, the outer surface of the air duct 1 is provided with a plurality of mounting feet 6, the mounting feet 6 are respectively provided with an elastic member 7, the elastic member 7 plays a role in damping, the vibration isolation efficiency reaches more than 92%, the service life is long, the vibration of the fan can be effectively isolated, and the mounting base can be protected, as shown in fig. 4, a shell is arranged outside the elastic member 7, the shell is composed of an upper shell and a lower shell, the upper shell and the lower shell can slide relative to each other, a closed space is formed between the two shells, and the elastic member 7 is located inside the closed space, so that the elastic member 7 is protected, and meanwhile, the attractiveness is improved.
Specifically, the blades 4 are synthesized by high-strength glass fibers and resin, so that noise generated by airflow impacting metal is avoided; meanwhile, the impeller is light in weight and small in rotational inertia, the starting and stopping time of a motor is shortened, the whole service life of equipment is prolonged, the blades 4 are high-efficiency wing blade types, airflow is stable, and turbulent flow noise is reduced to a certain extent.
Specifically, as shown in fig. 5, the hub 3 and the corresponding blade 4 are connected by bolts, the hub 3 is in a sandwich type, one end of the blade 4 close to the hub 3 is provided with a blade handle, the blade handle is located inside the hub 3, and the hub 3 clamps the blade handle and fixes the blade handle by bolts, so that the hub 3 is a whole.
Specifically, the inner wall of the air duct 1 is provided with silencing cotton, the air duct 1 is integrally formed by flanging high-quality carbon steel, the roundness is high, the uniform and consistent gap between the blades 4 and the air duct 1 is guaranteed, and the turbulent flow noise is reduced; the galvanized silencing porous plate and the silencing cotton are additionally arranged on the inner wall of the air duct 1, so that the airflow noise can be effectively reduced; meanwhile, the air duct is light in weight, good in rigidity and light in load loaded on a roof.
Particularly, the two ends of the air duct 1 are respectively provided with the protective net 8, so that foreign matters are prevented from being sucked into the fan, the fan is protected, and meanwhile, the safety of a ventilation system is also protected.
The working principle is as follows: when the air flow balancing silencer is used, the motor 2 drives the hub 3 to rotate, so that the hub 3 drives the blades 4 to rotate for air supply, and when air flows pass through the air outlet flow balancing silencing guide vane 5, high-speed air flows pressurized from the air duct 1 are smoothed, and turbulent flow noise is greatly reduced.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
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 (9)

1. Utility tunnel is with vertical installation axial fan of big amount of wind low noise, including dryer (1), motor (2), wheel hub (3) and blade (4), motor (2) are in through connecting plate (5) fixed connection the inside axle center department of dryer (1), wheel hub (3) fixed connection be in on the output shaft of motor (2), blade (4) fixed connection be in on the lateral wall of wheel hub (3), its characterized in that: the air outlet flow equalizing noise elimination guide vane (5) is further included, and the air outlet flow equalizing noise elimination guide vane (5) is located at one end of the air duct (1).
2. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to claim 1, characterized in that: the air outlet flow equalizing noise reduction guide vane (5) comprises a mounting ring (501) and flow equalizing guide vanes (502), and the flow equalizing guide vanes (502) are uniformly distributed on the outer surface of the mounting ring (501).
3. The large-air-volume low-noise vertical axial flow fan for the comprehensive pipe rack according to claim 2, characterized in that: the flow equalizing guide vane (502) is made of a galvanized silencing porous plate, and the mounting ring (501) is made of a galvanized steel plate.
4. The large-air-volume low-noise vertical axial flow fan for the comprehensive pipe rack according to claim 3, characterized in that: the outer surface of the flow equalizing guide vane (502) is wrapped with sound attenuation cotton.
5. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to any one of claims 1 to 3, characterized in that: the outer surface of the air duct (1) is provided with a plurality of mounting feet (6), and the mounting feet (6) are respectively provided with an elastic part (7).
6. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to any one of claims 1 to 3, characterized in that: the blade (4) is synthesized by high-strength glass fiber and resin, and the blade (4) is of an efficient wing profile.
7. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to any one of claims 1 to 3, characterized in that: the hub (3) and the corresponding blade (4) are connected through bolts.
8. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to any one of claims 1 to 3, characterized in that: the inner wall of the air duct (1) is provided with silencing cotton.
9. The large-air-volume low-noise vertical installation axial flow fan for the comprehensive pipe rack according to any one of claims 1 to 3, characterized in that: and two ends of the air duct (1) are respectively provided with a protective net (8).
CN202010542408.7A 2020-06-15 2020-06-15 Vertical installation axial fan of big amount of wind low noise for utility tunnel Pending CN111577665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010542408.7A CN111577665A (en) 2020-06-15 2020-06-15 Vertical installation axial fan of big amount of wind low noise for utility tunnel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010542408.7A CN111577665A (en) 2020-06-15 2020-06-15 Vertical installation axial fan of big amount of wind low noise for utility tunnel

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Publication Number Publication Date
CN111577665A true CN111577665A (en) 2020-08-25

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CN202010542408.7A Pending CN111577665A (en) 2020-06-15 2020-06-15 Vertical installation axial fan of big amount of wind low noise for utility tunnel

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4177478A1 (en) * 2021-11-03 2023-05-10 Talleres Zitrón, S.A. Axial fan with an integrated silencer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4177478A1 (en) * 2021-11-03 2023-05-10 Talleres Zitrón, S.A. Axial fan with an integrated silencer

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