CN116241492A - Four palace check rotary drum formula silence negative pressure fans - Google Patents
Four palace check rotary drum formula silence negative pressure fans Download PDFInfo
- Publication number
- CN116241492A CN116241492A CN202310025974.4A CN202310025974A CN116241492A CN 116241492 A CN116241492 A CN 116241492A CN 202310025974 A CN202310025974 A CN 202310025974A CN 116241492 A CN116241492 A CN 116241492A
- Authority
- CN
- China
- Prior art keywords
- rotary drum
- fan
- rotary
- bearing
- air
- 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
Links
- 241000886569 Cyprogenia stegaria Species 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 17
- 230000001743 silencing effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 241000883990 Flabellum Species 0.000 description 6
- 230000013011 mating Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using 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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/163—Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement
-
- 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
-
- 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
-
- 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
- F04D29/403—Casings; Connections of working fluid 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
- F04D29/66—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
- F04D29/666—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a four-grid rotary drum type mute negative pressure fan which comprises a fan shell, a fan cover plate, fan blades and a fan driving device. The rotary drum type fan blade structure is adopted, and a fan blade bracket is not required to be arranged at the central position of the airflow channel; the rotary drum type fan blade is rotatably arranged on the air drum through a first rotary bearing and a second rotary bearing, and then is driven by means of the cooperation of a driving gear and a rotary drum toothed ring; the whole airflow channel is not shielded except the fan blades, so that the fan has high efficiency, and the generation of airflow noise is well avoided, thereby having an excellent silencing effect. The four-palace-shaped fan blade layout is adopted, and the driving device is driven by hidden four-belt stable stress through a central driving gear; the operation efficiency is improved, the operation noise is reduced, and the waterproof and dustproof effects are achieved.
Description
Technical Field
The utility model relates to a structure of a negative pressure fan, in particular to a four-grid rotary drum type mute negative pressure fan.
Background
The negative pressure fan is a machine which utilizes the cooling principle of air convection and negative pressure ventilation to naturally suck fresh air from a door or a window which is opposite to an installation place, rapidly and forcedly discharges indoor sultry gas outdoors, and any problem of poor ventilation can be improved.
At present, the structure of the negative pressure fan can be divided into two types, one is a belt type negative pressure fan, and the other is a belt-free type (motor direct drive) negative pressure fan. Both have advantages and disadvantages.
The Chinese patent publication No. 2022-11-11, no. 2022210093017, no. CN 217783868U, discloses an energy-saving and environment-friendly negative pressure fan. Also, as disclosed in 2022-11-08, chinese patent application No. 2022211958298, publication No. CN 217761371U, is a high-efficiency energy-saving negative pressure fan. Both are common construction modes of the belt type negative pressure fan, and the belt type negative pressure fan has simple overall framework and low cost; however, the negative pressure fan with this structure has poor operation effect, and the belt is driven with large vibration and noise, and particularly the belt is driven at high speed to generate a harsh and buzzing sound due to friction.
The Chinese patent publication No. 2022-07-19, which is incorporated herein by reference, discloses an assembly structure of a negative pressure fan, as disclosed in patent No. 2021234227610, publication No. CN 217002420U. The motor direct-drive negative pressure fan structure is adopted, and the fan blade is directly driven by the motor arranged at the central position, so that the belt can be removed, and the structure is relatively compact; however, the negative pressure fan with the structure is arranged at the central position of the airflow channel due to the installation of the motor main body, so that the water drainage and dust prevention effects are poor, and a motor fixing seat is specially arranged, so that the structure is complicated.
The belt type negative pressure fan or the motor direct-drive negative pressure fan has the following two main defects: first, whether it is driven indirectly by a belt or directly by a motor, the fan (i.e., the blade portion) is inevitably erected by a corresponding bracket structure, so that the fan has a rotating supporting point, and thus, the air flow channel is necessarily blocked due to the fan bracket, which affects the air extraction efficiency and easily generates noise. Secondly, whether the motor is driven indirectly through a belt or directly through a motor, the transmission part of the driving device is necessarily connected with the central shaft of the fan, so that the transmission part is exposed to the airflow channel of the negative pressure fan, and the waterproof and dustproof effects of the negative pressure fan can be directly influenced; after a period of operation, the transmission part and the fan can accumulate thick greasy dirt and dust dirt on the connecting position, thereby affecting the operation and being difficult to clean.
Disclosure of Invention
Aiming at the defects, the utility model aims to provide a four-grid rotary drum type mute negative pressure fan which adopts a rotary drum type fan blade structure, and a fan blade bracket is not required to be arranged at the central position of an airflow channel; the four-palace-shaped fan blade layout is adopted, and the driving device is driven by hidden four-in-one stable stress through the central driving gear; the operation efficiency is improved, the operation noise is reduced, and the waterproof and dustproof effects are achieved.
The utility model adopts the technical scheme that: a four-grid rotary drum type mute negative pressure fan comprises a fan shell, a fan cover plate, fan blades and a fan driving device;
the fan shell is provided with four cylindrical air cylinders which are distributed in a four-palace form in a longitudinal and transverse arrangement manner, and each air cylinder is correspondingly provided with a fan blade; the inner edge positions of the front end and the rear end of the air duct are respectively provided with a first bearing outer ring mounting groove position and a second bearing outer ring mounting groove position, and a transmission position avoiding window is formed on one side of the air duct, facing the central position of the fan shell; the fan blade is a rotary drum type fan blade, the fan blade comprises a rotary drum part and a fan blade part arranged on the inner side of the rotary drum part, a first bearing inner ring mounting groove position and a second bearing inner ring mounting groove position are respectively arranged at the outer edge positions of the front end and the rear end of the rotary drum part, a rotary drum tooth ring is arranged at the outer middle ring position of the rotary drum part, the rotary drum type fan blade is rotationally arranged on an air drum through a first rotary bearing and a second rotary bearing, wherein the inner ring of the first rotary bearing corresponds to the first bearing inner ring mounting groove position of the rotary drum part, the outer ring corresponds to the first bearing outer ring mounting groove position of the air drum, the inner ring of the second rotary bearing corresponds to the second bearing inner ring mounting groove position of the rotary drum part, the outer ring corresponds to the second bearing outer ring mounting groove position of the air drum, in addition, the rotary drum tooth ring corresponds to a transmission avoidance window of the air drum, the fan driving device comprises a driving motor and a driving gear, the driving gear is arranged at the center position of a fan shell, and is respectively meshed with the rotary drum tooth rings of the rotary drum type fan blades in the four air drums, the driving motor is connected with the driving gear, the driving ring and the driving ring is matched with the driving gear to drive the rotary drum tooth ring to drive the four air drums to drive the rotary drum tooth ring to cover the fan shell, and the fan is closed by the fan driving device.
Further, the first rotating bearing and the second rotating bearing are waterproof sealing bearings, and the first rotating bearing and the second rotating bearing are respectively arranged at the front end and the rear end of the air duct and the rotary drum type fan blade, so that the air duct forms a rotating support for the rotary drum type fan blade, a transmission space formed between the air duct and the rotary drum type fan blade is blocked, the rotary drum toothed ring is sealed in the transmission space, and the rotary drum toothed ring is meshed with the driving gear only through a transmission avoidance window of the air duct.
Further, the air duct is also provided with a horn-shaped opening, and the inclination angle of the opening is 45 degrees.
Further, the rotary drum part, the fan blade part and the rotary drum toothed ring are of an integrated structure; the center of the fan blade part is provided with an annular fan blade connecting part, the annular fan blade connecting part is provided with a center vent hole, and the ratio of the diameter of the center vent hole to the diameter of the inner side channel of the rotary drum part is 1:5.
Further, the output end of the driving motor is connected with the driving gear through a speed reducer.
The utility model has the following advantages: the rotary drum type fan blade structure is adopted, and a fan blade bracket is not required to be arranged at the central position of the airflow channel; the rotary drum type fan blade is rotatably arranged on the air drum through a first rotary bearing and a second rotary bearing, and then is driven by means of the cooperation of a driving gear and a rotary drum toothed ring; the whole airflow channel is not shielded except the fan blades, so that the fan has high efficiency, and the generation of airflow noise is well avoided, thereby having an excellent silencing effect. In addition, the device can also reduce the residence of oil dirt and dust on the transmission part, and is very environment-friendly and clean in use.
The four-palace-shaped fan blade layout is adopted, and the driving device is driven by hidden four-belt stable stress through a central driving gear; the operation efficiency is improved, the operation noise is reduced, and the waterproof and dustproof effects are achieved. Because four dryer vertically and horizontally arranged are four palace format distribution, and every dryer all corresponds to be provided with a fan flabellum, so, the drive gear who is located central point can have sufficient space to rationally install to do enough big, improve the transmission ratio. Through the gear wheel, a gear wheel drives four rotary drum type fan blades simultaneously, the circumference is evenly driven and stressed, the running stability can still be kept under the condition of high rotating speed, and the situation that the negative pressure fan shakes is prevented. The fan is supported and rotated by means of the rotating bearing, the driving gear is driven by the rotary drum toothed ring in a matched mode, and the fan can always keep high-efficiency silence in the operation process.
Through experimental tests, the four-grid rotary-drum type mute negative pressure fan has the advantages that the four-grid rotary-drum type mute negative pressure fan is matched with the rotary-drum type fan structure without a central support, and the effect is higher than that of a common belt type negative pressure fan or a belt type negative pressure fan without a belt type (motor direct drive) by more than 50% under the condition of the same motor rotating speed (namely the same energy consumption) and the same size (for example, a square negative pressure fan with the size of 1 meter x 1 meter).
The utility model is further described with reference to the following description and detailed description of the drawings.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a four-grid rotary drum type mute negative pressure fan;
fig. 2 is a schematic diagram II of the overall structure of a four-grid rotary drum type mute negative pressure fan;
fig. 3 is a schematic diagram of the internal structure of a four-grid rotary drum type mute negative pressure fan;
FIG. 4 is a schematic diagram of the mating structure of the rotor blades and the wind barrel of the blower housing;
FIG. 5 is a schematic diagram of the mating structure of the rotating bearing and the wind barrel of the blower housing;
FIG. 6 is a schematic diagram of the mating structure of the fan drive and the fan barrel of the fan housing;
FIG. 7 is a schematic structural view of a blower housing;
FIG. 8 is a schematic diagram of the cooperation of a drive gear and a rotating drum fan blade;
FIG. 9 is a schematic diagram of the mating structure of a rotor blade and a rotational bearing;
in the figure: a fan housing 1; a wind drum 11; a first bearing outer race mounting groove 12; the second bearing outer ring mounting groove position 13; a transmission avoidance window 14; a horn-shaped opening 15; a fan cover plate 2; a rotor blade 3; a drum portion 31; a blade portion 32; a first bearing inner race mounting groove 33; a second bearing inner race mounting groove 34; a drum toothed ring 35; a central vent 36; a fan driving device 4; a drive motor 41; a drive gear 42; a first rotating bearing 5; a second rotary bearing 6.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, rear, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first" or "second" etc. in the embodiments of the present utility model, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1 to 9, the four-grid rotary drum type silent negative pressure fan provided in the present embodiment includes a fan housing 1, a fan cover plate 2, fan blades (i.e., rotary drum type fan blades 3) and a fan driving device 4;
the fan housing 1 is provided with four cylindrical air cylinders 11, the four air cylinders 11 are distributed in a four-palace form in a longitudinal and transverse arrangement manner, and each air cylinder 1 is correspondingly provided with a fan blade;
it should be noted here that the four-grid layout is emphasized because of the specific arrangement configuration of the subsequent fan driving device. Because four dryer vertically and horizontally arranged are four palace format distribution, and every dryer all corresponds to be provided with a fan flabellum, so, the drive gear who is located central point can have sufficient space to rationally install to do enough big, improve the transmission ratio. Through the gear wheel at the central position, one gear wheel drives four rotary drum type fan blades simultaneously, the circumference is uniformly driven and stressed, and the running stability can be kept under the condition of high rotating speed. If a single air duct is adopted to be matched with a single fan blade, the effect cannot be achieved at all. Therefore, four wind cylinders are matched with four rotary drum type fan blades, and only then can the central position be better utilized to set the fan driving device.
The inner edge positions of the front end and the rear end of the air duct 11 are respectively provided with a first bearing outer ring mounting groove position 12 and a second bearing outer ring mounting groove position 13, and a transmission position avoiding window 14 is formed on one side of the air duct 11, which faces the central position of the fan shell 1; the fan blade is a rotary drum type fan blade 3, and comprises a rotary drum part 31 and a fan blade part 32 arranged on the inner side of the rotary drum part 31, wherein the outer edge positions of the front end and the rear end of the rotary drum part 31 are respectively provided with a first bearing inner ring mounting groove position 33 and a second bearing inner ring mounting groove position 34, the middle ring position on the outer side of the rotary drum part 41 is provided with a rotary drum toothed ring 35, the rotary drum type fan blade 3 is rotationally arranged on the air drum 11 through a first rotary bearing 5 and a second rotary bearing 6, wherein the inner ring of the first rotary bearing 5 corresponds to the first bearing inner ring mounting groove position 33 of the rotary drum part 31, the outer ring corresponds to the first bearing outer ring mounting groove position 12 of the air drum 11, the inner ring of the second rotary bearing 6 corresponds to the second bearing inner ring mounting groove position 34 of the rotary drum part 31, the outer ring corresponds to the second bearing outer ring mounting groove position 14 of the air drum 11, in addition, the rotary drum toothed ring 35 corresponds to the transmission gear window 14 of the air drum 11 (so that the rotary drum toothed ring 35 is mutually meshed with a driving gear 42), the fan driving device 4 comprises a driving motor 41 and a driving gear 42, the driving gear 42 is arranged on the center position of the fan housing 1, the driving gear 42 corresponds to the driving gear 42 of the rotary drum 3 in the four rotary drum toothed ring 3 through the rotary drum toothed ring 42, and the driving gear 42 is simultaneously meshed with the rotary drum 3;
the rotary drum type fan blade structure is adopted, and a fan blade bracket is not required to be arranged at the central position of the airflow channel; the rotary drum type fan blade is rotatably arranged on the air drum through a first rotary bearing and a second rotary bearing, and then is driven by means of the cooperation of a driving gear and a rotary drum toothed ring; the whole airflow channel is not shielded except the fan blades, so that the fan has high efficiency, and the generation of airflow noise is well avoided, thereby having an excellent silencing effect. In addition, the device can also reduce the residence of oil dirt and dust on the transmission part, and is very environment-friendly and clean in use.
The rotary drum type fan blade structure is matched with the double bearings to rotate and support, the rotary drum type fan blade structure is stable and does not shake, the front side and the rear side of the rotary drum type fan blade are sealed by the first waterproof sealing bearing and the second waterproof sealing bearing, air flow and even dust cannot enter the transmission part of the rotary drum type fan blade (namely, the transmission of a driving gear and a rotary drum toothed ring cannot be influenced), and the protection and mute effects are excellent.
The fan cover 2 covers the fan housing 1, thereby hiding the fan drive 4. After the fan shell and the fan cover plate are mutually covered, the fan driving device, the bearing, the driving toothed ring and other parts can be well hidden from the appearance, so that the whole fan is square and regular, and the installation is convenient.
Specifically, the first rotating bearing 5 and the second rotating bearing 6 are waterproof sealing bearings, and the first rotating bearing and the second rotating bearing are respectively arranged at the front end and the rear end of the air duct and the rotary drum type fan blade, so that the air duct forms a rotating support for the rotary drum type fan blade, a transmission space formed between the air duct and the rotary drum type fan blade is blocked, the rotary drum toothed ring is sealed in the transmission space, and the rotary drum toothed ring is meshed with the driving gear only through a transmission avoidance window of the air duct. In certain running environment, the negative pressure fan inevitably has the existence of water vapor, greasy dirt and even dust, adopts the double waterproof sealing bearings arranged in front and back, and utilizes the transmission space formed by the wind cylinder and the rotary drum type fan blade to form a relatively sealed protection environment, so that the influence of the factors of water vapor, greasy dirt and even dust on an internal transmission component can be well avoided, the waterproof and dustproof effects of the fan are ensured, the mute effect is improved, and the service life is prolonged.
Specifically, the air duct 11 is further provided with a horn-shaped opening 15 having an inclination angle of 45 °. The opening part of the air duct is designed into a horn shape, so that the channel of the air duct has a space change of firstly narrowing and secondly widening along the air flow direction, and the air duct is matched with the upper rotary drum type fan blade structure, so that the air suction effect is excellent, and high-speed and high-pressure air flow is formed. The four palace form flabellum overall arrangement and the rotary drum formula flabellum structure of no center support, in addition the opening part design of dryer becomes loudspeaker formula (has the effect of guiding the air current to the diffusion all around gradually), is favorable to negative pressure fan to form a stable inside and outside air current air pressure difference fast when the operation for the air-out is more quick and smooth.
Specifically, the drum portion 31, the fan blade portion 32, and the drum toothed ring 35 are integrally formed; the center of the blade portion 32 is an annular blade connection portion, and the annular blade connection portion is provided with a central ventilation hole 36, and the ratio of the diameter of the central ventilation hole 36 to the diameter of the inner channel of the drum portion 31 is 1:5. Through design rotary drum portion, flabellum portion and rotary drum ring gear to will stride to establish parts such as fan support frame and driving belt in the middle of the dryer and cancel, only remain the rotary drum flabellum, will block the air current through dryer passageway and the adverse effect of air current to the fan reduces to minimum, reduces fan rotational speed and reduces the running noise when guaranteeing the air output. The role of the central vent is emphasized here. Because of the existence of the central ventilation hole and the adoption of proper aperture ratio, the air draft effect of the rotary drum type fan blade is much better. Because the central ventilation hole with proper diameter is arranged, when the rotary drum type fan blade runs, the central position is always an air flow channel with the size of the central ventilation hole, which is not interfered by the fan blade, under the condition of air flow pressure difference of the horn type air duct channel, the air flow passing through the central ventilation hole is blowout type, the air suction effect is more obvious, and the air suction effect can be well improved. If the fan is constructed according to the prior negative pressure fan, the center of the fan is a supporting rotating shaft, and the center vent hole which plays a role in exhausting air and pressure difference cannot be arranged at all.
Specifically, the output end of the driving motor 41 is connected to a driving gear 42 through a speed reducer. In order to improve the controllability of the fan, a speed reducer can be arranged between the driving motor and the driving gear so as to better regulate the rotating speed.
The utility model is not limited to the above embodiment, and other four-grid rotary drum type mute negative pressure fans are obtained by adopting the same or similar technical characteristics as the above embodiment of the utility model, and are all within the protection scope of the utility model.
Claims (5)
1. The four-palace-grid rotary drum type mute negative pressure fan comprises a fan shell, a fan cover plate, fan blades and a fan driving device, and is characterized in that the fan shell is provided with four cylindrical air cylinders which are distributed in a four-palace-grid mode in a longitudinal and transverse arrangement mode, and each air cylinder is correspondingly provided with one fan blade; the inner edge positions of the front end and the rear end of the air duct are respectively provided with a first bearing outer ring mounting groove position and a second bearing outer ring mounting groove position, and a transmission position avoiding window is formed on one side of the air duct, facing the central position of the fan shell; the fan blade is a rotary drum type fan blade, the fan blade comprises a rotary drum part and a fan blade part arranged on the inner side of the rotary drum part, a first bearing inner ring mounting groove position and a second bearing inner ring mounting groove position are respectively arranged at the outer edge positions of the front end and the rear end of the rotary drum part, a rotary drum tooth ring is arranged at the outer middle ring position of the rotary drum part, the rotary drum type fan blade is rotationally arranged on an air drum through a first rotary bearing and a second rotary bearing, wherein the inner ring of the first rotary bearing corresponds to the first bearing inner ring mounting groove position of the rotary drum part, the outer ring corresponds to the first bearing outer ring mounting groove position of the air drum, the inner ring of the second rotary bearing corresponds to the second bearing inner ring mounting groove position of the rotary drum part, the outer ring corresponds to the second bearing outer ring mounting groove position of the air drum, in addition, the rotary drum tooth ring corresponds to a transmission avoidance window of the air drum, the fan driving device comprises a driving motor and a driving gear, the driving gear is arranged at the center position of a fan shell, and is respectively meshed with the rotary drum tooth rings of the rotary drum type fan blades in the four air drums, the driving motor is connected with the driving gear, the driving ring and the driving ring is matched with the driving gear to drive the rotary drum tooth ring to drive the four air drums to drive the rotary drum tooth ring to cover the fan shell, and the fan is closed by the fan driving device.
2. The four-grid rotary drum type mute negative pressure fan according to claim 1, wherein the first rotary bearing and the second rotary bearing are waterproof sealing bearings, the first rotary bearing and the second rotary bearing are respectively arranged at the front end and the rear end of the air drum and the rotary drum type fan blade, so that the air drum forms rotary support for the rotary drum type fan blade, a transmission space formed between the air drum and the rotary drum type fan blade is blocked, the rotary drum toothed ring is sealed in the transmission space, and the rotary drum toothed ring is meshed with the driving gear only through a transmission avoidance window of the air drum.
3. The four-grid rotary drum type silent negative pressure fan according to claim 1, wherein the air duct is further provided with a horn-shaped opening, and the inclination angle of the opening is 45 °.
4. The four-grid rotary drum type silent negative pressure fan according to claim 1, wherein the rotary drum part, the fan blade part and the rotary drum toothed ring are of an integrally formed structure; the center of the fan blade part is provided with an annular fan blade connecting part, the annular fan blade connecting part is provided with a center vent hole, and the ratio of the diameter of the center vent hole to the diameter of the inner side channel of the rotary drum part is 1:5.
5. The four-grid rotary drum type mute negative pressure fan according to claim 1, wherein the output end of the driving motor is connected with the driving gear through a speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310025974.4A CN116241492A (en) | 2023-01-09 | 2023-01-09 | Four palace check rotary drum formula silence negative pressure fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310025974.4A CN116241492A (en) | 2023-01-09 | 2023-01-09 | Four palace check rotary drum formula silence negative pressure fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116241492A true CN116241492A (en) | 2023-06-09 |
Family
ID=86625372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310025974.4A Pending CN116241492A (en) | 2023-01-09 | 2023-01-09 | Four palace check rotary drum formula silence negative pressure fans |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116241492A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535270U (en) * | 2009-11-05 | 2010-07-28 | 广东美的电器股份有限公司 | Air-conditioning parallel-connection blower fan system |
| CN205154673U (en) * | 2015-11-27 | 2016-04-13 | 仨亿电器有限公司 | Low -noise axial flow fan |
| CN207454330U (en) * | 2017-09-30 | 2018-06-05 | 西北工业大学 | A kind of shaftless wind turbine of gear-rack drive formula |
| CN112539502A (en) * | 2020-12-12 | 2021-03-23 | 浙江巨运管业有限公司 | Pipeline supercharging device for fresh air system |
| JP2021139296A (en) * | 2020-03-02 | 2021-09-16 | ダイキン工業株式会社 | Blower device |
| CN215719691U (en) * | 2021-09-08 | 2022-02-01 | 北天河科技集团有限公司 | Three-group combined negative pressure fan |
| DE202022102753U1 (en) * | 2022-03-23 | 2022-05-31 | Huaneng Dingbian New Energy Power Generation Co., Ltd | Axial fan with changeable air direction |
| CN114673543A (en) * | 2022-03-31 | 2022-06-28 | 德州启源空调设备有限公司 | Tunnel emergency air exhaust combined fan and use method thereof |
-
2023
- 2023-01-09 CN CN202310025974.4A patent/CN116241492A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535270U (en) * | 2009-11-05 | 2010-07-28 | 广东美的电器股份有限公司 | Air-conditioning parallel-connection blower fan system |
| CN205154673U (en) * | 2015-11-27 | 2016-04-13 | 仨亿电器有限公司 | Low -noise axial flow fan |
| CN207454330U (en) * | 2017-09-30 | 2018-06-05 | 西北工业大学 | A kind of shaftless wind turbine of gear-rack drive formula |
| JP2021139296A (en) * | 2020-03-02 | 2021-09-16 | ダイキン工業株式会社 | Blower device |
| CN112539502A (en) * | 2020-12-12 | 2021-03-23 | 浙江巨运管业有限公司 | Pipeline supercharging device for fresh air system |
| CN215719691U (en) * | 2021-09-08 | 2022-02-01 | 北天河科技集团有限公司 | Three-group combined negative pressure fan |
| DE202022102753U1 (en) * | 2022-03-23 | 2022-05-31 | Huaneng Dingbian New Energy Power Generation Co., Ltd | Axial fan with changeable air direction |
| CN114673543A (en) * | 2022-03-31 | 2022-06-28 | 德州启源空调设备有限公司 | Tunnel emergency air exhaust combined fan and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8770943B2 (en) | Axial flow fan | |
| US7887289B2 (en) | Blower system | |
| CN103603817B (en) | Middle drum pressure blower fan | |
| CN116241492A (en) | Four palace check rotary drum formula silence negative pressure fans | |
| JP2002242887A (en) | Axial fan | |
| EP3657025B1 (en) | Cross-flow impeller device and cooling fan | |
| CN215860965U (en) | Fan with dustproof structure | |
| JP2007300729A (en) | Motor | |
| EP1847716B1 (en) | Axial flow blower | |
| CN206099653U (en) | Induced draft from fanning cold type open motor | |
| CN208011890U (en) | Cabinet air-conditioner and air conditioner | |
| CN203660726U (en) | Motor end cover structure and motor employing same | |
| JP2018182839A (en) | Rotary electric machine | |
| CN220505429U (en) | Impeller shaft mounting structure, cross-flow fan and air pipe machine | |
| CN205544793U (en) | Variable frequency motor | |
| CN215333422U (en) | Dry-type screw vacuum pump bearing seat | |
| CN212265460U (en) | Angle grinder | |
| CN216437407U (en) | Outdoor microphone audio amplifier with wireless function of charging | |
| CN210033897U (en) | Direct current draught fan | |
| CN221170058U (en) | Fan and cabinet air conditioner indoor unit | |
| CN210423157U (en) | Volute fan shell assembly and volute fan comprising same | |
| CN214944533U (en) | Air leakage prevention type automobile radiator fan | |
| JPH094868A (en) | High air pressure type air conditioner | |
| CN215502763U (en) | Brushless motor and have its machine of sweeping floor | |
| CN217508441U (en) | Superspeed wind motor vibration/noise reduction structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |