CN109209998A - Angle of fan leaves regulating system, device and blower based on face gear transmission - Google Patents

Angle of fan leaves regulating system, device and blower based on face gear transmission Download PDF

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Publication number
CN109209998A
CN109209998A CN201811237602.3A CN201811237602A CN109209998A CN 109209998 A CN109209998 A CN 109209998A CN 201811237602 A CN201811237602 A CN 201811237602A CN 109209998 A CN109209998 A CN 109209998A
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CN
China
Prior art keywords
face gear
vane frame
angle
gear
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
CN201811237602.3A
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Chinese (zh)
Inventor
李晓贞
盛冬平
门艳忠
黄志荣
高双胜
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Changzhou Institute of Technology
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Changzhou Institute of Technology
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Filing date
Publication date
Application filed by Changzhou Institute of Technology filed Critical Changzhou Institute of Technology
Priority to CN201811237602.3A priority Critical patent/CN109209998A/en
Publication of CN109209998A publication Critical patent/CN109209998A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34Blade mountings
    • F04D29/36Blade mountings adjustable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention belongs to driving structure technical fields, disclose a kind of angle of fan leaves regulating system, device and blower based on face gear transmission, are provided with vane frame;Vane frame includes roller gear connecting shaft, motor connecting hole, vane frame pedestal, vane frame pedestal connecting plate;Vane frame tube chamber welds with base is linked in the face gear upper surface of face gear, four vane frame pedestals by vane frame pedestal connecting plate;Angular adjustment knob is the integrated design with face gear, and the motor of blower links hole with the motor of vane frame and linked by key.The present invention is meshed using face gear with the roller gear on fan blade, all fan blades are driven to rotate synchronously in face gear rotation, it realizes the same angular adjustment of all fan blades, and the rotation that fan blade can be 360 °, can control fan delivery from the step-less adjustment for being just pressed onto negative pressure.The advantages of angle of fan leaves regulating mechanism of the invention is driven using face gear, can fully demonstrate face gear transmission, so that propeller regulating mechanism structure is simple, safe and reliable.

Description

Angle of fan leaves regulating system, device and blower based on face gear transmission
Technical field
The invention belongs to driving structure technical field more particularly to a kind of angle of fan leaves tune based on face gear transmission Section system, device and blower.
Background technique
Currently, the prior art commonly used in the trade is such that blower generally includes 3-5 blade, for conveying gas.? In the course of work of blower, need to adjust fan delivery and wind speed according to working condition requirement sometimes.The air quantity and wind of blower are adjusted at present The method of speed mainly passes through fixed blade angle, and the revolving speed method for changing blower realizes that the setting angle of fan blade is fixed It is non-adjustable, in blade there are when the case where mismachining tolerance, installation error, the work of blower is influenced because blade angle degree is fixed Efficiency, and easily there is surge phenomenon.Also there is blade angle degree regulating mechanism at present, working principle mainly passes through worm gear snail The engaged transmission of bar or traditional bevel gear pair reaches adjusting angle of fan leaves.Wherein, worm gear mechanism is taken up too much space, The size of blower entirety is influenced, and transmission ratio is big, angle of fan leaves adjusts inaccurate;And the blade angle of traditional bevel gear pair Regulating mechanism, it is desirable that the two bevel gears vertex of a cone is overlapped, therefore need to increase the structure for making two bevel gears that the vertex of a cone be kept to be overlapped, so that blade tune The complicated integral structure for saving mechanism, increases the failure rate of system, influences the bulk life time of blower.
In conclusion problem of the existing technology is: structure is complicated for blade angle degree regulating mechanism at present, and adjusts Section mechanism is easily damaged, and influences the bulk life time of blower.
Solve the difficulty and meaning of above-mentioned technical problem:
The present invention is based on the angle of fan leaves regulating systems of face gear transmission, have given full play to the excellent of face gear transmission Point can accurately adjust angle of fan leaves, and the requirement that the vertex of a cone is overlapped, the installation error of roller gear axial direction is not present in face gear The transmission of opposite gear pair does not influence, so that entire angular adjustment system structure is simple, to be increased to the entirety of blower Service life.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of angle of fan leaves tune based on face gear transmission Section system, device and blower.
The invention is realized in this way a kind of angle of fan leaves regulating system, the angle of fan leaves regulating system Include:
Gear link block, for realizing the connection with roller gear;
Motor link block, for realizing the axis connection with motor;
Face gear fixed module, for fixing face gear;
Plate module is connected, for realizing the connection of face gear fixed module and gear link block.
Another object of the present invention is to provide it is a kind of realize the angle of fan leaves regulating system based on face gear The angle of fan leaves regulating device of transmission, the angle of fan leaves regulating device based on face gear transmission are provided with
Vane frame;
Vane frame includes roller gear connecting shaft, motor connecting hole, vane frame pedestal, vane frame pedestal connecting plate;
Vane frame tube chamber welds with base is connected in the face gear upper surface of face gear, four vane frame pedestals by vane frame pedestal Plate link;
Angular adjustment knob is the integrated design with face gear, and the motor of blower links hole with the motor of vane frame and passes through key Link.
Further, fan blade is tightly linked with roller gear by key interference fit, roller gear and vane frame bearing chain It connects.
Another object of the present invention is to provide the angle of fan leaves based on face gear transmission described in a kind of realize to adjust The angle of fan leaves adjusting method based on face gear transmission of device, the angle of fan leaves tune based on face gear transmission Section method includes: that motor is linked with vane frame by key, rotates synchronously vane frame and motor;The rotation of vane frame will drive four A roller gear, fan blade and face gear common rotation realize the air delivery function of blower;Vane frame makes with roller gear It is linked with bearing, roller gear is rotated around the roller gear connecting shaft of vane frame;Roller gear is linked with fan blade by key, It moves synchronously;
In the angle for needing to adjust fan blade, rotational angle adjusting knob, angular adjustment knob and face gear are one Bodyization design, face gear are rotated with the rotation of angular adjustment knob, and face gear is meshed with roller gear, in rotational angle tune When saving button, the angle of fan blade is adjusted, and angular adjustment knob does not limit, realizes turnover movement.
The angle of fan leaves tune based on face gear transmission is installed another object of the present invention is to provide a kind of The blower of regulating device.
In conclusion advantages of the present invention and good effect are as follows: the present invention substitutes traditional cone using face gear auxiliary driving Gear realizes that crossed axis angle is 90 ° of power transmission.Face gear is meshed with multiple roller gears simultaneously, each roller gear difference With a fan blade static connection, in face gear rotation, all roller gears are rotated synchronously, and realize that all fan blades are same The adjusting of angle, and with the continuous rotation of face gear, the turnover campaign that fan blade can be 360 ° can control fan delivery from just It is pressed onto the step-less adjustment of negative pressure.Angle of fan leaves regulating mechanism of the invention uses face gear pair, can fully demonstrate face gear The advantages of transmission, face gear are driven compared with traditional Bevel Gear Transmission, and the roller gear axial direction vibration in face gear pair is to biography It is dynamic not influence, therefore installation accuracy is required low;Face gear transmitting coinsidence is up to 2.0 or more, therefore face gear transmission is held Loading capability is big;The requirement that the vertex of a cone is overlapped is not present in face gear pair, and face gear transmission system is not required to the design vertex of a cone and is overlapped mechanism, therefore face Gear auxiliary structure is simple.Because face gear transmission has the above advantages, it is driven using face gear so that fan blade regulating mechanism knot Structure is simple, safe and reliable.
Detailed description of the invention
Fig. 1 is the angle of fan leaves regulating device structural representation provided in an embodiment of the present invention based on face gear transmission Figure;
Fig. 2 is the structural schematic diagram of angular adjustment knob provided in an embodiment of the present invention;
Fig. 3 is the structural schematic diagram of vane frame provided in an embodiment of the present invention;
Fig. 4 is the structural schematic diagram of roller gear provided in an embodiment of the present invention;
Fig. 5 is the structural schematic diagram of fan blade provided in an embodiment of the present invention;
Fig. 6 is face gear isometric view provided in an embodiment of the present invention;
Fig. 7 is that the embodiment of the present invention provides the angle of fan leaves regulating device overall schematic being driven based on face gear;
In figure: 1, face gear;2, roller gear;3, fan blade;4, vane frame;5, motor links hole;6, angular adjustment Knob;7, roller gear connecting shaft;8, vane frame links hole;9, fan blade connecting shaft;10, face gear upper surface;11, motor Connecting hole;12, vane frame pedestal;13, vane frame pedestal connecting plate.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
For current blade angle degree regulating mechanism, structure is complicated, and regulating mechanism is easily damaged, and influences blower Bulk life time is excessive.Angle of fan leaves regulating mechanism of the invention is driven using face gear, fully demonstrates face gear transmission Advantage, so that propeller regulating mechanism structure is simple, safe and reliable.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
As shown in Figure 1-Figure 3, the angle of fan leaves regulating device provided in an embodiment of the present invention based on face gear transmission It include: face gear 1, roller gear 2, fan blade 3, vane frame 4, motor link hole 5, angular adjustment knob 6, roller gear company Spindle 7, vane frame link hole 8, fan blade connecting shaft 9, face gear upper surface 10, motor connecting hole 11, vane frame pedestal 12, Vane frame pedestal connecting plate 13.
Fan blade 3 is tightly linked with roller gear 2 by key interference fit, and roller gear 2 is linked with 4 bearing of vane frame; The vane frame pedestal 12 of vane frame 4 is welded on the face gear upper surface 10 of face gear 1, and four vane frame pedestals 12 pass through vane frame Pedestal connecting plate 13 links;Angular adjustment knob 6 is the integrated design with face gear 1, the motor of blower and the motor of vane frame 4 Hole 5 is linked to link by key.
Vane frame 4 includes roller gear connecting shaft 7, motor connecting hole 11, vane frame pedestal 12, vane frame pedestal connecting plate 13。
Angular adjustment knob 6 is the integrated design with face gear 1, makes 1 turn of face gear by rotating angle adjusting knob 6 It is dynamic, four roller gears 2 are rotated by engaged transmission, achieve the purpose that adjust blade angle.
In a preferred embodiment of the invention, the vane frame pedestal 12 of vane frame 4 is welded on the upper surface 10 of face gear 1, Four vane frame pedestals 12 are linked by vane frame pedestal connecting plate 13.
In a preferred embodiment of the invention, fan blade 3 is tightly linked with roller gear 2 by key interference fit, So that fan blade 3 is rotated with the vane frame connecting hole 8 of roller gear 2 and adjusts angle.
In a preferred embodiment of the invention, roller gear 2 is linked with vane frame 4 using bearing, enable roller gear 2 around The roller gear connecting shaft 7 of vane frame 4 rotates.
In a preferred embodiment of the invention, the vane frame pedestal 12 of vane frame 4 is welded on the upper surface 10 of face gear 1, Four vane frame pedestals 12 are linked by vane frame pedestal connecting plate 13.
In a preferred embodiment of the invention, the motor of blower and the hole 5 of vane frame 4 are linked by key, realize synchronous turn It is dynamic.
Motor of the present invention is linked with vane frame 4 by key, and vane frame 4 and motor are rotated synchronously;The rotation of vane frame 4 will 1 common rotation of four roller gears 2, fan blade 3 and face gear is driven, realizes the air delivery function of blower;Vane frame 4 with Roller gear 2 is to be linked using bearing, therefore roller gear 2 can be rotated around the roller gear connecting shaft 7 of vane frame 4;Roller gear 2 It is linked, can be moved synchronously by key with fan blade 3;When needing to adjust the angle of fan blade 3, it is only necessary to rotational angle tune Section knob 6 can be realized, and because angular adjustment knob 6 and face gear 1 are the integrated design, therefore face gear 1 can be with angular adjustment The rotation of knob 6 and rotate, face gear 1 is meshed with roller gear 2 again, so can adjust in rotational angle regulation button 6 The angle of fan blade 3, and angular adjustment knob 6 does not limit, and is able to achieve turnover movement, therefore fan blade 3 is able to achieve 360 ° of rotation makes blower be able to achieve the control of conveying air quantity, and is able to achieve two functions of air-supply and air draught.
The present invention uses face gear drive technology, and the roller gear 2 in transmission does not have responsive to axial force, therefore roller gear 2 axially mounted error does not have an impact transmission performance, simple, more safe and reliable than using other driving form structures.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (5)

1. a kind of angle of fan leaves regulating system, which is characterized in that the angle of fan leaves regulating system includes:
Gear link block, for realizing the connection with roller gear;
Motor link block, for realizing the axis connection with motor;
Face gear fixed module, for fixing face gear;
Plate module is connected, for realizing the connection of face gear fixed module and gear link block.
2. a kind of angle of fan leaves based on face gear transmission for realizing angle of fan leaves regulating system described in claim 1 Regulating device, which is characterized in that the angle of fan leaves regulating device based on face gear transmission is provided with
Vane frame;
Vane frame includes roller gear connecting shaft, motor connecting hole, vane frame pedestal, vane frame pedestal connecting plate;
Vane frame tube chamber welds with base passes through vane frame pedestal connecting plate chain in the face gear upper surface of face gear, four vane frame pedestals It connects;
Angular adjustment knob is the integrated design with face gear, and the motor of blower links hole with the motor of vane frame and passes through key chain It connects.
3. the angle of fan leaves regulating device as claimed in claim 2 based on face gear transmission, which is characterized in that blower leaf Piece is tightly linked with roller gear by key interference fit, and roller gear is linked with vane frame bearing.
4. a kind of angle of fan leaves regulating device realized based on face gear transmission described in claim 2 is passed based on face gear Dynamic angle of fan leaves adjusting method, which is characterized in that the angle of fan leaves adjusting method based on face gear transmission Include: that motor is linked with vane frame by key, rotates synchronously vane frame and motor;The rotation of vane frame will drive four cylinders Gear, fan blade and face gear common rotation realize the air delivery function of blower;Vane frame and roller gear use bearing Link, roller gear are rotated around the roller gear connecting shaft of vane frame;Roller gear is linked with fan blade by key, synchronous fortune It is dynamic;
In the angle for needing to adjust fan blade, rotational angle adjusting knob, angular adjustment knob is integrated with face gear Design, face gear are rotated with the rotation of angular adjustment knob, and face gear is meshed with roller gear, are pressed in rotational angle adjusting When button, the angle of fan blade is adjusted, and angular adjustment knob does not limit, realizes turnover movement.
5. a kind of angle of fan leaves regulating device being equipped with based on face gear transmission described in claim 2~3 any one Blower.
CN201811237602.3A 2018-10-23 2018-10-23 Angle of fan leaves regulating system, device and blower based on face gear transmission Pending CN109209998A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811237602.3A CN109209998A (en) 2018-10-23 2018-10-23 Angle of fan leaves regulating system, device and blower based on face gear transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811237602.3A CN109209998A (en) 2018-10-23 2018-10-23 Angle of fan leaves regulating system, device and blower based on face gear transmission

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Publication Number Publication Date
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111207094A (en) * 2020-02-24 2020-05-29 曹天远 Axial flow fan of wide region regulation blade angle
CN112065756A (en) * 2019-06-11 2020-12-11 北京航天奥祥通风科技股份有限公司 Air quantity adjusting device
CN112128038A (en) * 2020-09-19 2020-12-25 湖南九耐环保科技发展有限公司 Adjustable impeller structure and hydroelectric power generation equipment
CN113653653A (en) * 2021-09-27 2021-11-16 安徽工业大学 Half-rotating cross flow fan impeller
CN114017386A (en) * 2021-11-29 2022-02-08 上海冠带通风节能设备有限公司 High-energy fan
CN114992160A (en) * 2022-07-19 2022-09-02 安徽朗迪叶轮机械有限公司 Axial flow fan blade with detachable blades
CN115013358A (en) * 2022-06-29 2022-09-06 安徽朗迪叶轮机械有限公司 Angle-adjustable axial flow fan blade
CN116717483A (en) * 2023-05-30 2023-09-08 上海森伊新能源有限公司 Axial flow fan

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820995A (en) * 1981-07-31 1983-02-07 Ebara Corp Axial-flow fan
SE442764B (en) * 1985-04-15 1986-01-27 Erik Ehlin Propeller apparatus with adjustable blades
JPS61232303A (en) * 1985-04-06 1986-10-16 Dengiyoushiya Kikai Seisakusho:Kk Normal/reverse rotatable fluid machinery
JPS62291499A (en) * 1986-06-11 1987-12-18 Hitachi Zosen Corp Vane pitch reverse type jet fan
JPH01134099A (en) * 1987-08-21 1989-05-26 Ishikawajima Harima Heavy Ind Co Ltd Hydraulic machine
CN2203374Y (en) * 1994-07-07 1995-07-12 重庆钢铁(集团)公司 Adjustable wind rate blower
KR20090029037A (en) * 2007-09-17 2009-03-20 (주)한서정공 Fan for spraying agricultural chemicals
KR20110000928U (en) * 2009-07-21 2011-01-27 주식회사 하나테크 Ventilation fan
CN204025144U (en) * 2014-08-26 2014-12-17 温岭市灵其防爆机电有限公司 Industry flabellum
CN107143411A (en) * 2017-06-12 2017-09-08 威隼汽车科技(宁波)有限公司 A kind of automobile fan
CN107676284A (en) * 2017-08-23 2018-02-09 太原理工大学 A kind of fan blade adjusting means, counter-rotating fan and fan blade adjusting method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820995A (en) * 1981-07-31 1983-02-07 Ebara Corp Axial-flow fan
JPS61232303A (en) * 1985-04-06 1986-10-16 Dengiyoushiya Kikai Seisakusho:Kk Normal/reverse rotatable fluid machinery
SE442764B (en) * 1985-04-15 1986-01-27 Erik Ehlin Propeller apparatus with adjustable blades
JPS62291499A (en) * 1986-06-11 1987-12-18 Hitachi Zosen Corp Vane pitch reverse type jet fan
JPH01134099A (en) * 1987-08-21 1989-05-26 Ishikawajima Harima Heavy Ind Co Ltd Hydraulic machine
CN2203374Y (en) * 1994-07-07 1995-07-12 重庆钢铁(集团)公司 Adjustable wind rate blower
KR20090029037A (en) * 2007-09-17 2009-03-20 (주)한서정공 Fan for spraying agricultural chemicals
KR20110000928U (en) * 2009-07-21 2011-01-27 주식회사 하나테크 Ventilation fan
CN204025144U (en) * 2014-08-26 2014-12-17 温岭市灵其防爆机电有限公司 Industry flabellum
CN107143411A (en) * 2017-06-12 2017-09-08 威隼汽车科技(宁波)有限公司 A kind of automobile fan
CN107676284A (en) * 2017-08-23 2018-02-09 太原理工大学 A kind of fan blade adjusting means, counter-rotating fan and fan blade adjusting method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112065756A (en) * 2019-06-11 2020-12-11 北京航天奥祥通风科技股份有限公司 Air quantity adjusting device
CN111207094A (en) * 2020-02-24 2020-05-29 曹天远 Axial flow fan of wide region regulation blade angle
CN112128038A (en) * 2020-09-19 2020-12-25 湖南九耐环保科技发展有限公司 Adjustable impeller structure and hydroelectric power generation equipment
CN112128038B (en) * 2020-09-19 2022-04-15 湖南新邵筱溪水电开发有限责任公司 Adjustable impeller structure and hydroelectric power generation equipment
CN113653653A (en) * 2021-09-27 2021-11-16 安徽工业大学 Half-rotating cross flow fan impeller
CN113653653B (en) * 2021-09-27 2024-05-07 安徽工业大学 Half-turn cross flow fan impeller
CN114017386A (en) * 2021-11-29 2022-02-08 上海冠带通风节能设备有限公司 High-energy fan
CN114017386B (en) * 2021-11-29 2024-04-26 上海冠带通风节能设备有限公司 High-energy fan
CN115013358A (en) * 2022-06-29 2022-09-06 安徽朗迪叶轮机械有限公司 Angle-adjustable axial flow fan blade
CN115013358B (en) * 2022-06-29 2024-01-16 安徽朗迪叶轮机械有限公司 Axial flow fan blade with adjustable angle
CN114992160A (en) * 2022-07-19 2022-09-02 安徽朗迪叶轮机械有限公司 Axial flow fan blade with detachable blades
CN116717483A (en) * 2023-05-30 2023-09-08 上海森伊新能源有限公司 Axial flow fan

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