CN111608942A - Axial flow fan - Google Patents
Axial flow fan Download PDFInfo
- Publication number
- CN111608942A CN111608942A CN202010448592.9A CN202010448592A CN111608942A CN 111608942 A CN111608942 A CN 111608942A CN 202010448592 A CN202010448592 A CN 202010448592A CN 111608942 A CN111608942 A CN 111608942A
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- CN
- China
- Prior art keywords
- annular
- motor
- fan blades
- fan
- annular positioning
- 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
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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
- 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
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- 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
- F04D29/002—Details, component parts, or accessories 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
- F04D29/38—Blades
Abstract
The invention discloses an axial flow fan which comprises an air duct, wherein a motor support is arranged in the air duct, a motor is arranged on the motor support, fan blades are arranged on an output shaft of the motor, an annular positioning ring is arranged on the air duct, an annular positioning groove is formed between the annular positioning ring and the side wall of the air duct, a propping strip with an arc-shaped inner wall is arranged laterally on the outer ring of each fan blade, and the propping strip is arranged in the annular positioning groove. The fan is provided with the supporting strips with the inner walls being arc-shaped and abutting against the outer ends of the fan blades, the air duct is provided with the supporting rings supporting the supporting strips of the outer ends of the fan blades, deformation of the fan blades can be reduced in the rotating process of the fan blades, mechanical efficiency under high rotating speed is further improved, plastic deformation of the fan blades can be prevented, required strength of the fan blades can be reduced, the thickness of the fan blades is reduced, and manufacturing cost and energy consumption of the rotating fan blades are reduced.
Description
Technical Field
The invention belongs to the technical field of fans, and particularly relates to an axial flow fan.
Background
The fan is the common equipment of building factory ventilation, and current axial fan generally includes a dryer, installs the motor support in the dryer, installs the motor on the motor support, is equipped with the fan blade on the output shaft of motor, rotates so that the air flow through motor drive fan blade. The existing fan is provided with a fan which controls the rotating speed of a motor through a frequency conversion controller, the rotating speed of the fan can be controlled according to the change of the use environment, when the fan blades of the axial flow fan run, the strength of the fan blade is enough to support the fan blade to bear force when the fan blade runs at low rotating speed, the fan blade is not easy to deform, and higher mechanical efficiency can be obtained, but when the fan blade runs at high rotating speed, because the strength of the fan blades is not enough to support the thrust, the fan blades are easy to deform, so that the overall mechanical efficiency of the fan is reduced, the air volume is reduced to a certain extent, and the long-term high-speed rotation can cause the shaping deformation of the fan blades, which leads to the change of the shape of the fan blades, and further affects the mechanical efficiency of the fan at low rotational speeds, and in order to prevent this, in the prior art, thicker and higher-strength fan blades have to be adopted, the manufacturing cost is obviously increased, and more energy consumption is inevitably caused by driving the thicker fan blades.
Disclosure of Invention
The axial flow fan is provided with the abutting strips with the arc-shaped inner walls at the outer ends of the fan blades, and the air cylinder is provided with the supporting rings for supporting the abutting strips at the outer ends of the fan blades, so that the deformation of the fan blades can be reduced in the rotating process of the fan blades, the mechanical efficiency at the rotating speed is improved, the plastic deformation of the fan blades can be prevented, the required strength of the fan blades can be reduced, the thickness of the fan blades is reduced, and the manufacturing cost of the fan blades and the energy consumption of the rotating fan blades are reduced.
In order to solve the technical problem, the invention is solved by the following technical scheme: the utility model provides an axial fan, includes the dryer, be provided with the motor support in the dryer, be provided with the motor on the motor support, be provided with the fan blade on the output shaft of motor, be provided with annular position circle on the dryer, annular position circle with form annular positioning groove between the dryer lateral wall, fan blade outer lane side direction is provided with the inner wall and supports for circular-arc to lean on the strip, support to lean on the strip set up in the annular positioning groove. When the motor drives the fan blades to rotate at a low speed, the fan blades cannot deform and normally operate, when the motor rotates at a high speed, the fan blades deform to a certain amount, the abutting strips of the outer rings of the fan blades can abut against the outer wall of the annular positioning ring, and the annular positioning ring supports the fan blades, so that the mechanical efficiency at a high rotating speed is improved, meanwhile, the plastic deformation of the fan blades can be prevented, the required strength of the fan blades can be reduced, the thickness of the fan blades is reduced, and the manufacturing cost and the energy consumption of the rotating fan blades are reduced.
In the above technical scheme, preferably, an annular slide way is arranged on the annular positioning ring and located on the inner wall of the annular positioning groove, a plurality of balls are arranged in the annular slide way, and the balls protrude out of the surface of the annular slide way. The friction between the abutting strip and the outer wall of the annular locating ring is reduced through rolling of the balls, abrasion is reduced, and resistance is reduced.
In the above technical scheme, preferably, the opening of the annular slide is smaller than the diameter of the ball, and the annular slide is provided with an installation opening larger than the diameter of the ball. Adopt this structure to make things convenient for the ball installation.
Among the above-mentioned technical scheme, it is preferred, annular position circle is the step, annular position circle large circle lateral wall periphery with the dryer laminating is fixed, annular position circle small circle lateral wall periphery is provided with annular slide.
In the above technical solution, preferably, a sealing housing is disposed outside the motor, an air inlet pipeline and an air outlet pipeline communicated with the outside of the air duct are disposed on the sealing housing, a cooling channel is formed between the motor and the sealing housing, a centrifugal fan blade is further disposed on an output shaft of the motor, the centrifugal fan blade is located in the sealing housing, the centrifugal fan blade includes an annular positioning plate, a plurality of heat-sensitive bimetallic strips are disposed on the annular positioning plate, one end of each heat-sensitive bimetallic strip is fixed on the annular positioning plate, the other end of each heat-sensitive bimetallic strip is connected with an arc-shaped blade, and the plurality of arc-shaped blades form a circular ring in a low-temperature state; under the high-temperature state, the thermal sensitive bimetallic strip deforms to drive the arc-shaped blades to rotate for a plurality of angles towards the center direction of the annular positioning plate. When the axial flow fan operates at low temperature, the arc-shaped blades on the centrifugal fan blades are surrounded to form a circular ring, the arc-shaped blades are hardly stressed when the annular positioning plate rotates, energy consumption can be effectively reduced, the heat-sensitive bimetallic strip is deformed to drive the arc-shaped blades to face the center of the annular positioning plate to rotate for a plurality of angles, and the arc-shaped blades can drive the air flow at the center to be outwards dispersed in the rotating process of the annular positioning plate, so that cold air outside the air duct can enter from the air inlet pipeline and is discharged from the air outlet pipeline through the cooling channel, the heat dissipation efficiency of the motor is improved, and the axial flow fan is particularly suitable for being used under the working conditions of transmitting high-temperature gas and transmitting low-temperature.
In the above technical scheme, preferably, a volute is arranged at the tail of the sealing shell, the centrifugal fan blade is arranged in the volute, and the volute is connected with the air outlet pipeline. By adopting the structure, the gas transmission efficiency of the centrifugal fan blade can be improved, so that the energy consumption can be reduced when the motor is at low temperature, and the motor can be rapidly cooled when the motor is at high temperature.
In the above technical scheme, preferably, a plurality of abutting portions are arranged on the annular positioning plate, and the plurality of arc-shaped blades abut against the abutting portions respectively in a high-temperature state. The support through supporting to the portion can strengthen the intensity of arc blade under high temperature state, prevents that the arc blade from rocking, guarantees gas conveying's efficiency.
Compared with the prior art, the invention has the following beneficial effects: when the motor drives the fan blades to rotate at a low speed, the fan blades cannot deform and normally operate, when the motor rotates at a high speed, the fan blades deform to a certain amount, the abutting strips of the outer rings of the fan blades can abut against the outer wall of the annular positioning ring, and the annular positioning ring supports the fan blades, so that the mechanical efficiency at a high rotating speed is improved, meanwhile, the plastic deformation of the fan blades can be prevented, the required strength of the fan blades can be reduced, the thickness of the fan blades is reduced, and the manufacturing cost and the energy consumption of the rotating fan blades are reduced.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic structural diagram of a fan blade in an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an annular retainer ring in an embodiment of the present invention.
Fig. 5 is a schematic structural view of a centrifugal fan blade in a low temperature state according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a centrifugal fan blade in a high temperature state according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 6, an axial flow fan, including dryer 1, dryer 1 internal fixation has motor support 2, be fixed with motor 3 on the motor support 2, be provided with fan blade 4 on motor 3's the output shaft, the welding has annular position circle 5 on the dryer 1, annular position circle 5 is the step, 5 big ring lateral wall peripheries of annular position circle and dryer 1 laminating welded fastening, form annular constant head tank 6 between 5 little ring lateral walls of annular position circle and the dryer 1 lateral wall, 5 little ring lateral wall peripheries of annular position circle are provided with annular slide 8. A plurality of balls 9 are arranged in the annular slide way 8, and the balls 9 protrude out of the surface of the annular slide way 8. The opening of the annular slide way 8 is smaller than the diameter of the ball 9, and the annular slide way 8 is provided with a mounting opening 10 which is larger than the diameter of the ball 9. The outer ring of each fan blade 4 is laterally provided with a supporting strip 7 with an arc-shaped inner wall, and the supporting strip 7 is arranged in the annular positioning groove 6.
When the motor 3 drives the fan blades 4 to rotate at a low speed, the fan blades 4 cannot deform and normally operate, when the motor 3 rotates at a high speed, a certain amount of deformation occurs to the fan blades 4, the abutting strips 7 of the outer rings of the fan blades 4 can abut against the outer wall of the small circular side wall of the annular positioning ring 5, the balls 9 abut against the strips 7 on the fan blades 4 to support, the fan blades 4 are prevented from generating a large amount of deformation, meanwhile, the plastic deformation of the fan blades 4 can be prevented, the required strength of the fan blades 4 can be reduced, the thickness of the fan blades 4 is reduced, the manufacturing cost of the fan blades 4 is reduced, and the energy consumption of the.
The motor 3 outer weld has seal housing 11, form cooling channel 14 between motor 3 and the seal housing 11, be provided with admission line 12 and the pipeline 13 of giving vent to anger with dryer 1 outside intercommunication on the seal housing 11, still be provided with centrifugal fan blade 100 on the output shaft of motor 3, in this embodiment, the output shaft of motor 3 runs through the shell of motor 3, fan blade 4 is located the front side of output shaft, centrifugal fan blade 100 is located the tail side of output shaft, the afterbody of seal housing 11 is provided with spiral case 111, centrifugal fan blade 100 is located spiral case 111, spiral case 111 links to each other with the pipeline 13 of giving vent to anger, admission line 12 is located the front side of seal housing 11. When the centrifugal fan 100 rotates to convey air, cold air outside the air duct 1 can enter from the air inlet pipeline 12, pass through the cooling channel 14, enter from the center of the volute 111, and is discharged from the air outlet pipeline 13 after passing through the centrifugal fan 100, so as to take away heat of the motor 3.
The centrifugal fan blade 100 comprises an annular positioning plate 101, the annular positioning plate 101 is used for being fixedly installed with an output shaft of a motor, eight thermosensitive bimetallic strips 102 which are uniformly distributed are welded on the annular positioning plate 101, one ends of the thermosensitive bimetallic strips 102 are welded on the annular positioning plate 101, arc-shaped blades 103 are welded at the other ends of the thermosensitive bimetallic strips, the eight arc-shaped blades 103 form a circular ring in a surrounding mode under a low-temperature state, and the thermosensitive bimetallic strips 102 deform to drive the arc-shaped blades 103 to rotate 50 degrees towards the center direction of the annular positioning plate 101 under a high-temperature state. The thermal bimetal 102 is made of two layers of metals with different thermal expansion amounts, is approximately arc-shaped, and can turn over after being heated, so as to drive the arc-shaped blade 103 to rotate towards the center direction of the annular positioning plate 101. The shape of the thermal bimetal 102 and the thickness of the two metal layers can be set according to the temperature required to be deformed, and the shape changes when the set temperature is reached, which is a common prior art in the thermal switch, and in the embodiment, the thermal bimetal 102 deforms when the temperature reaches 67 degrees. That is, in the present embodiment, the high temperature state is 67 degrees or more, and the low temperature state is 67 degrees or less. When the centrifugal fan blade 100 operates at a low temperature, the arc-shaped blades 103 on the centrifugal fan blade 100 form a circular ring in a surrounding manner, at the moment, the arc-shaped blades 103 hardly take force when the annular positioning plate 101 rotates, energy consumption can be effectively reduced, under a high-temperature state, the heat-sensitive bimetallic strip 102 deforms to drive the arc-shaped blades 103 to rotate 50 degrees towards the center direction of the annular positioning plate, in the rotating process of the annular positioning plate 101, the arc-shaped blades 103 can drive the central airflow to be outwards diffused, so that cold air outside the air duct 1 can enter from the air inlet pipeline 12 and pass through the cooling channel 14 to enter from the center of the volute 111, and is discharged from the air outlet pipeline 13 after passing through the centrifugal. The axial flow fan is particularly suitable for being used under the working conditions of transmitting high-temperature gas and transmitting low-temperature gas.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides an axial fan, includes dryer (1), be provided with motor support (2) in dryer (1), be provided with motor (3) on motor support (2), be provided with fan blade (4), its characterized in that on the output shaft of motor (3): be provided with annular position circle (5) on dryer (1), annular position circle (5) with form annular positioning groove (6) between dryer (1) lateral wall, fan blade (4) outer lane side direction is provided with the inner wall and supports and lean on strip (7) for circular-arc, support and lean on strip (7) set up in annular positioning groove (6).
2. The axial flow fan of claim 1, wherein: the annular positioning ring (5) is provided with an annular slide way (8) at the inner wall of the annular positioning groove (6), a plurality of balls (9) are arranged in the annular slide way (8), and the balls (9) protrude out of the surface of the annular slide way (8).
3. The axial flow fan of claim 2, wherein: the opening of annular slide (8) is less than the diameter of ball (9), be provided with on annular slide (8) and be greater than installing port (10) of ball (9) diameter.
4. The axial flow fan of claim 2, wherein: annular position circle (5) are the step shape, annular position circle (5) big ring lateral wall periphery with dryer (1) laminating is fixed, annular position circle (5) small ring lateral wall periphery is provided with annular slide (8).
5. The axial flow fan of claim 1, wherein: a sealing shell (11) is arranged outside the motor (3), an air inlet pipeline (12) and an air outlet pipeline (13) which are communicated with the outside of the air duct (1) are arranged on the sealing shell (11), a cooling channel (14) is formed between the motor (3) and the sealing shell (11), a centrifugal fan blade (100) is further arranged on an output shaft of the motor (3), the centrifugal fan blade (100) is located in the sealing shell (11), the centrifugal fan blade (100) comprises an annular positioning plate (101), a plurality of thermosensitive bimetallic strips (102) are arranged on the annular positioning plate (101), one ends of the thermosensitive bimetallic strips (102) are fixed on the annular positioning plate (101), the other ends of the thermosensitive bimetallic strips are connected with arc-shaped blades (103), and the arc-shaped blades (103) form a circular ring in a low-temperature state; under the high-temperature state, the heat-sensitive bimetallic strip (102) deforms to drive the arc-shaped blades (103) to rotate for a plurality of angles towards the center direction of the annular positioning plate (101).
6. The axial flow fan of claim 5, wherein: the method is characterized in that: the tail of the sealing shell (11) is provided with a volute (111), the centrifugal fan blade (100) is arranged in the volute (111), and the volute (111) is connected with the air outlet pipeline (13).
7. The axial flow fan of claim 5, wherein: the method is characterized in that: a plurality of abutting parts (104) are arranged on the annular positioning plate (101), and under a high-temperature state, the arc-shaped blades (103) are respectively abutted against the abutting parts (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010448592.9A CN111608942A (en) | 2020-05-25 | 2020-05-25 | Axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010448592.9A CN111608942A (en) | 2020-05-25 | 2020-05-25 | Axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111608942A true CN111608942A (en) | 2020-09-01 |
Family
ID=72204971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010448592.9A Pending CN111608942A (en) | 2020-05-25 | 2020-05-25 | Axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111608942A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983863A (en) * | 2021-03-10 | 2021-06-18 | 浙江科力风机有限公司 | Energy-saving environment-friendly axial flow fan capable of reducing noise |
| CN116557312A (en) * | 2023-05-16 | 2023-08-08 | 绍兴上虞通风机有限公司 | Pressurized humidity control axial flow fan and humidity control method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022241A1 (en) * | 1980-06-13 | 1981-12-24 | Volkswagenwerk Ag, 3180 Wolfsburg | Cooling water pump for vehicle engine - has curved blades made of bimetallic material to vary flow to match water temp. |
| JPS60111017A (en) * | 1983-11-21 | 1985-06-17 | Nippon Soken Inc | Water pump of water-cooled internal-combustion engine |
| DE3425688A1 (en) * | 1984-07-12 | 1986-01-23 | Bayerische Motoren Werke AG, 8000 München | Impeller for a centrifugal feed device |
| JPH05248394A (en) * | 1992-03-06 | 1993-09-24 | Nec Corp | Variable air quantity fan |
| CN2924091Y (en) * | 2006-05-25 | 2007-07-18 | 曲靖中建工程技术有限公司 | High-temperature, high-moisture resisting fan |
| CN102221014A (en) * | 2010-04-16 | 2011-10-19 | 株式会社山田制作所 | Impeller for water pump |
| CN204458510U (en) * | 2015-01-15 | 2015-07-08 | 浙江雄博电气有限公司 | Blower fan |
| CN106989035A (en) * | 2017-06-07 | 2017-07-28 | 江苏恒康机电有限公司 | Energy saving low noise axial-flow blower |
| CN208651234U (en) * | 2018-07-27 | 2019-03-26 | 浙江创力电子股份有限公司 | Direct current air exhausting device |
-
2020
- 2020-05-25 CN CN202010448592.9A patent/CN111608942A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022241A1 (en) * | 1980-06-13 | 1981-12-24 | Volkswagenwerk Ag, 3180 Wolfsburg | Cooling water pump for vehicle engine - has curved blades made of bimetallic material to vary flow to match water temp. |
| JPS60111017A (en) * | 1983-11-21 | 1985-06-17 | Nippon Soken Inc | Water pump of water-cooled internal-combustion engine |
| DE3425688A1 (en) * | 1984-07-12 | 1986-01-23 | Bayerische Motoren Werke AG, 8000 München | Impeller for a centrifugal feed device |
| JPH05248394A (en) * | 1992-03-06 | 1993-09-24 | Nec Corp | Variable air quantity fan |
| CN2924091Y (en) * | 2006-05-25 | 2007-07-18 | 曲靖中建工程技术有限公司 | High-temperature, high-moisture resisting fan |
| CN102221014A (en) * | 2010-04-16 | 2011-10-19 | 株式会社山田制作所 | Impeller for water pump |
| CN204458510U (en) * | 2015-01-15 | 2015-07-08 | 浙江雄博电气有限公司 | Blower fan |
| CN106989035A (en) * | 2017-06-07 | 2017-07-28 | 江苏恒康机电有限公司 | Energy saving low noise axial-flow blower |
| CN208651234U (en) * | 2018-07-27 | 2019-03-26 | 浙江创力电子股份有限公司 | Direct current air exhausting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983863A (en) * | 2021-03-10 | 2021-06-18 | 浙江科力风机有限公司 | Energy-saving environment-friendly axial flow fan capable of reducing noise |
| CN112983863B (en) * | 2021-03-10 | 2023-03-14 | 浙江科力风机有限公司 | Energy-saving environment-friendly axial flow fan capable of reducing noise |
| CN116557312A (en) * | 2023-05-16 | 2023-08-08 | 绍兴上虞通风机有限公司 | Pressurized humidity control axial flow fan and humidity control method thereof |
| CN116557312B (en) * | 2023-05-16 | 2023-11-17 | 绍兴上虞通风机有限公司 | Pressurized humidity control axial flow fan and humidity control method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200901 |
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| RJ01 | Rejection of invention patent application after publication |