CN102705250A - Minitype centrifugal fan - Google Patents
Minitype centrifugal fan Download PDFInfo
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- CN102705250A CN102705250A CN2012102145330A CN201210214533A CN102705250A CN 102705250 A CN102705250 A CN 102705250A CN 2012102145330 A CN2012102145330 A CN 2012102145330A CN 201210214533 A CN201210214533 A CN 201210214533A CN 102705250 A CN102705250 A CN 102705250A
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- mandrel
- centrifugal fan
- spiral case
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Abstract
The invention provides a minitype centrifugal fan which comprises a motor, a volute and a centrifugal fan contained in the volute; the motor is positioned outside the volute and is fixed with the volute; a main shaft of the motor passes through a center hole of the centrifugal fan; the main shaft of the motor and the centrifugal fan are located by a pin which radially passes through the main shaft and is laid in an end face cross groove of a core shaft; and the core shaft of the centrifugal fan is axially fixed with the main shaft of the motor. The minitype centrifugal fan has the advantages of small volume, high rotate speed, low noise, high oxygen supply efficiency and the like.
Description
Technical field
The present invention relates to the oxygen system of boiler or heater, particularly a kind of Small Centrifugal Fan.
Background technique
Boiler or heater need produce heat through burning, and the continuous supply that need to continue combustion medium and oxygen of combustion process in order to satisfy the demand of burning to oxygen, needs blower fan and for burning oxygen is provided continuously.For the design of blower fan, need satisfy the requirement of heater product volume miniaturization.
Summary of the invention
The objective of the invention is to design the Small Centrifugal Fan that a kind of volume is little, rotating speed is high, noise is low, efficiency of oxygen supply is high, to satisfy the requirement of small product size miniaturization.
For this reason, the embodiment of the invention adopts following technological scheme:
A kind of Small Centrifugal Fan comprises motor, spiral case and is contained in the centrifugal cutter in the said spiral case, and said motor is positioned at the said spiral case outside and is fixedly connected with said spiral case; The main shaft of said motor passes the center hole of the mandrel of centrifugal cutter; Said electric machine main shaft and said centrifugal cutter are by the pin location in the end face translot that is placed on said mandrel that radially pass said main shaft and heavy, the mandrel of said centrifugal cutter and said electric machine main shaft axial restraint.
Wherein, said spiral case comprises the circular arc connecting plate of front shroud, back shroud, the said front shroud of connection and said back shroud and the flange plate that is arranged on position, said spiral case air outlet; Said front shroud center is provided with the opening that supplies said centrifugal cutter turnover; Said back shroud center is provided with the circular hole that cooperates the location with the motor boss, and said back shroud is fixedly connected through sunk screw with said motor, is provided with at said circular hole periphery and makes the counter sink of said sunk screw in being embedded in.
Wherein, said spiral case also comprises the ring end cap that is positioned at said opening that matches with said front shroud.
Wherein, the external frame of said front shroud and said back shroud is that four summits with the square portion that is positioned at its center are that gradually open in the center of circle.
Wherein, the circular arc design is adopted in the snail tongue position of said spiral case.
Wherein, the exit portion of said spiral case is cooperating part to be designed with the angle of throat of 5-7 degree with flange plate.
Wherein, Said centrifugal cutter comprises impeller and said mandrel, and said impeller comprises front cover, rear end cover, several curved blades, and the middle part of said rear end cover is provided with the fan boss towards said front cover; Said fan boss center has two shapes, shoulder hole not of uniform size; Wherein macropore is near the flat structure of milling of said rear end cover, and wherein aperture is near said front cover, and said mandrel is the one-level boss structure that matches with said shoulder hole; Its front end matches with said aperture, the mill flat structure of its rear end for matching with said macropore.
Wherein, on the front surface of said rear end cover, be positioned at said boss structure around be provided with the boss stiffening rib, and/or said front cover is taper, and/or the outside of said mandrel offers circumferential antiratchetting groove, and/or the number of said curved blade is an integer.
Wherein, said end face translot is arranged on the ear end face of said mandrel.
Wherein, the front end that leans out the said main shaft of said mandrel is equipped with locking nut, and the said main shaft between motor boss and the mandrel is provided with packing ring, and the main shaft between mandrel and the locking nut is provided with back-up ring.
Technique effect analysis for technique scheme is following:
Centrifugal blower provided by the invention utilizes the high speed rotating of motor to drive centrifugal cutter, and fan drives the gas that air forms certain kinetic energy, and spiral case compiles the centrifugal cutter exit flow to the blower fan outlet, forms the air-flow of certain pressure.Centrifugal blower provided by the invention has that volume is little, rotating speed is high, noise is low, the efficiency of oxygen supply advantages of higher.
The spiral case technical matters property of centrifugal blower provided by the invention is good, and the processing location is very convenient; Because the front and rear cover plate of spiral case is along gradually opening the arc transition slyness, so windage is little, efficient is high; And because snail tongue circular arc is bigger, so noise is little.
The advantage of the centrifugal cutter in the centrifugal blower provided by the invention is: the impeller vane circular arc adopts integer, and the processing accurate positioning is convenient; Axial inclination through the tapered front end lid can improve compressed-air actuated efficient; Mandrel adopts boss structure, and assembling and positioning is convenient and reliable; The mandrel boss designs antiratchetting groove up and down, has simplified assembly technology.And the size that can design centrifugal cutter is to satisfy the requirement of Small Centrifugal Fan.
Description of drawings
Fig. 1 is a Small Centrifugal Fan structural representation of the present invention;
Fig. 2 is motor of the present invention and spiral case assembling schematic representation;
Fig. 3 is centrifugal cutter of the present invention and the local enlarged diagram of motor connection part;
Fig. 4 is a worm frame schematic representation of the present invention;
Fig. 5 is the local enlarged diagram of the flange plate of spiral case of the present invention;
Fig. 6 is a centrifugal cutter structural representation of the present invention;
Fig. 7 is a blade wheel structure schematic representation of the present invention;
Fig. 8 is the local enlarged diagram of mandrel of the present invention.
Label declaration is following in the accompanying drawing:
11: spiral case; 12: motor; 13: centrifugal cutter; 14: end cap;
121: the motor boss; M1: suction port; M2: air outlet;
20: sunk screw; 21: pin; 22: packing ring; 23: back-up ring; 24: locking nut;
111: front shroud; 112: back shroud; 113: the circular arc connecting plate; 114: flange plate;
H1: circular hole; H2: counter sink; H3: big hole; H4-H5: tapped hole; H6: counter sink;
C: circular arc; S: square portion;
131: impeller; 132: mandrel; M3: fan air intake; M4: fan air outlet;
C1: antiratchetting groove; C2: end face translot;
1311: front cover; 1312: rear end cover; 1313: curved blade; 1314: the fan boss;
1315: stiffening rib.
Embodiment
At first combine Fig. 1-3, the integral body of Small Centrifugal Fan provided by the invention is introduced.
With reference to figure 1, Small Centrifugal Fan provided by the invention is made up of spiral case 11, motor 12 and centrifugal cutter 13, and preferably, centrifugal blower also comprises end cap 14.Wherein, open the suction port M1 and the air outlet M2 of blower fan on the spiral case 11.
With reference to figure 1 and Fig. 2, spiral case 11 is accomplished through the motor boss 121 of motor front end with the location of motor 12, and motor 12 is accomplished through sunk screw 20 (for example, four or more sunk screws 20) with the fixing of spiral case 11.
With reference to figure 1 and Fig. 3; The center hole of centrifugal cutter 13 cooperates with motor 12 main shafts; Centrifugal cutter 13 relies on the pin 21 that passes on the electric machine main shaft to realize with the location of motor 12; The bearing pin 21 heavy end face translots (hereinafter combines Fig. 8 to introduce in detail) that are put into the fan mandrel guarantee that like this centrifugal cutter 13 and motor 12 main shafts rotate synchronously.Centrifugal cutter 13 relies on completion such as packing ring 22, back-up ring 23, electric machine main shaft screw thread (not shown), locking nut 24 with the axial restraint of motor 12.
Preferably, with reference to figure 1, the outside, spiral case 11 positive the place ahead is provided with the end cap 14 of band central opening (as the suction port M1 of blower fan).After spiral case 11 that centrifugal cutter 13 is packed into, end cap 14 is fixed on (hereinafter combines Fig. 4 to introduce in detail) on the front shroud of spiral case 11.End cap 14 plays protection centrifugal cutter 13 and the effect of raising the efficiency.
The working principle and the process of Small Centrifugal Fan provided by the invention are: motor 12 is with several thousand rev/mins (for example, 6000 rev/mins), and high speed rotating drives centrifugal cutter 13 in 11 li rotations of spiral case; Centrifugal cutter 13 rotates and drives air; Make air form the air-flow of certain speed, spiral case 11 compiles air-flow and guides them into the blower fan outlet, goes out the specific air-flow with kinetic energy of interruption-forming at blower fan; Pressure (for example can reach the hundreds of handkerchief; 800 handkerchiefs), wind speed can reach tens meter per seconds (for example, 40 meter per seconds).
The present invention provides centrifugal blower, utilizes the high speed rotating of motor to drive centrifugal cutter, and fan drives the gas that air forms certain kinetic energy, and spiral case compiles the centrifugal cutter exit flow to the blower fan outlet, forms the air-flow of certain pressure.Centrifugal blower provided by the invention has that volume is little, rotating speed is high, noise is low, the efficiency of oxygen supply advantages of higher.
Below, in conjunction with Fig. 4-5, the spiral case 11 of Small Centrifugal Fan of the present invention is introduced.
With reference to figure 4, spiral case 11 is made up of front shroud 111, back shroud 112, circular arc connecting plate 113, flange plate 114.In the middle of the back shroud 112 a circular hole H1 being arranged, is to be used for cooperating the location with motor boss 121.Circular hole H1 periphery has several (four or more) counter sink H2, be connected and fixed spiral case 11 and motor 12 thereby supply sunk screw 21 to pass, and the top of sunk screw 21 just in time is embedded in inside the counter sink H2, to guarantee the normal rotation of blast fan.The cylindrical of front and rear cover plate is that four summits with the square S of portion are that gradually open in the center of circle, has both guaranteed the continuous light degree of slipping over of circular arc, makes that again the processing location is convenient.The circular arc C design is adopted in snail tongue position, and noise is little and technology capability good.The exit portion of leading to spiral case 11 helps improving the pressure and the speed of exit flow cooperate part to be designed with the for example angle of throat of 5-7 degree with flange plate.A big hole H3 is designed at front shroud 111 centers, is the turnover space when being used for making things convenient for the installation of blast fan; On the surface of front shroud 111, be designed with three tapped hole H4 that are uniformly distributed with, be used to install the end cap 14 of blower fan.Spiral case 11 circle designs have circular arc connecting plate 113, and it connects the space that front and rear cover plate forms a sealing.Be designed with flange plate 114 at spiral case 11 outlet positions, flange plate 114 plays the effect that connects gas piping; In conjunction with reference to figure 5, be designed with tapped hole H5 above the flange plate 114, thereby tapped hole H5 can supply bolt etc. to fix through being connected with boiler or heater intake grill.
The spiral case technical matters property of centrifugal blower provided by the invention is good, and the processing location is very convenient; Because front and rear cover plate is gradually opened the arc transition slyness, windage is little, and efficient is high; And because snail tongue circular arc is bigger, so noise is little.
At last, in conjunction with Fig. 6-8, the centrifugal cutter 13 of Small Centrifugal Fan of the present invention is introduced.
With reference to figure 6, centrifugal cutter 13 is made up of impeller 131 and mandrel 132.Fan center is provided with the fan air intake M3 that is communicated with the suction port M1 of blower fan, and both sides are provided with fan air outlet M4 up and down, and the air-flow that this fan air outlet M4 forms converges to the air outlet M2 of blower fan.
With reference to figure 7, impeller 131 is made up of structures such as front cover 1311, rear end cover 1312, curved blade 1313, fan boss 1314, stiffening ribs 1315.Fan air intake M3 has been opened at front cover 1311 centers, does not contact between front cover 1311 and the rear end cover 1312, promptly leaves the gap as fan air outlet M4.Be designed with two shapes, shoulder hole (cylindricality countersunk head through hole) H6 not of uniform size at impeller 131 centers, large and small hole connects whole fan boss 1314, and this structure is used to install mandrel 132, and wherein macropore is to mill flat structure.Fan boss 1314 cylindricals are designed with stiffening rib 1315, are in order to increase boss structure intensity.Preferably, adopt an integer curved blade 1313.And preferably, front cover is to the progressive taper of suction port, thereby can improve compressed-air actuated efficient.
With reference to figure 8, mandrel 132 surfaces are that the one-level boss mills flat structure.Mill on the flat structure two sections cylindrical body cylindrical at platform and to be processed with twice antiratchetting groove C1, mandrel 132 with guarantee impeller 131 axial positions location after impeller 131 cooperates, antiratchetting groove C1 guarantees that impeller 131 cooperates firmly with mandrel 132.On large round end surface, be processed with laterally more shallow end face translot C2.Be designed with center hole at the mandrel middle part; This center hole structure is to cooperate for the main shaft with motor 12; Radially wear a little pin 21 (combination Fig. 3) on the main shaft of motor 12; Pin 21 laterally is embedded in the end face translot C2 of mandrel 132, guarantees motor 12 and mandrel 132 no relative movement, and motor 12 drives mandrel 132 high speed rotating.The flat structure of milling of mandrel 132 is guaranteed mandrel 132 and impeller 131 no relative movement, and centrifugal cutter 13 integral body are just rotated with the rotation of motor 12 like this.
The working principle and the process of centrifugal cutter 13 are: impeller 131 is high speed rotating under the drive of motor 12; Air gets at fan air intake M3; Under the common compression of curved blade 1313 and front and rear cover; Air is compressed, is accelerated, and M4 forms air-flow and converges to the air outlet M2 of blower fan in the fan air outlet.
The advantage of the centrifugal cutter in the centrifugal blower provided by the invention is: the impeller vane circular arc adopts integer, and the processing accurate positioning is convenient; Through the front cover axial inclination, can improve compressed-air actuated efficient; Mandrel adopts boss structure, and assembling and positioning is convenient and reliable; The mandrel boss designs antiratchetting groove up and down, has simplified assembly technology.And the size that can design centrifugal cutter is to satisfy the requirement of Small Centrifugal Fan.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. a Small Centrifugal Fan is characterized in that, comprises motor, spiral case and is contained in the centrifugal cutter in the said spiral case, and said motor is positioned at the said spiral case outside and is fixedly connected with said spiral case; The main shaft of said motor passes the center hole of the mandrel of centrifugal cutter; Said electric machine main shaft and said centrifugal cutter are by the pin location in the end face translot that is placed on said mandrel that radially pass said main shaft and heavy, the mandrel of said centrifugal cutter and said electric machine main shaft axial restraint.
2. require 1 described Small Centrifugal Fan according to claim, it is characterized in that, said spiral case comprises the circular arc connecting plate of front shroud, back shroud, the said front shroud of connection and said back shroud and the flange plate that is arranged on position, said spiral case air outlet; Said front shroud center is provided with the opening that supplies said centrifugal cutter turnover; Said back shroud center is provided with the circular hole that cooperates the location with the motor boss, and said back shroud is fixedly connected through sunk screw with said motor, is provided with at said circular hole periphery and makes the counter sink of said sunk screw in being embedded in.
3. Small Centrifugal Fan according to claim 2 is characterized in that, said spiral case also comprises the ring end cap that is positioned at said opening that matches with said front shroud.
4. Small Centrifugal Fan according to claim 2 is characterized in that, the external frame of said front shroud and said back shroud is that four summits with the square portion that is positioned at its center are that gradually open in the center of circle.
5. Small Centrifugal Fan according to claim 2 is characterized in that, the circular arc design is adopted in the snail tongue position of said spiral case.
6. Small Centrifugal Fan according to claim 2 is characterized in that, the exit portion of said spiral case is cooperating part to be designed with the angle of throat of 5-7 degree with flange plate.
7. according to each described Small Centrifugal Fan of claim 1 to 6, it is characterized in that said centrifugal cutter comprises impeller and said mandrel; Said impeller comprises front cover, rear end cover, several curved blades; The middle part of said rear end cover is provided with the fan boss towards said front cover, and said fan boss center has two shapes, shoulder hole not of uniform size, and wherein macropore is near the flat structure of milling of said rear end cover; Wherein aperture is near said front cover; The one-level boss structure of said mandrel for matching with said shoulder hole, its front end matches with said aperture, the mill flat structure of its rear end for matching with said macropore.
8. Small Centrifugal Fan according to claim 7; It is characterized in that; On the front surface of said rear end cover, be positioned at said boss structure around be provided with the boss stiffening rib; And/or said front cover is to the progressive taper of suction port, and/or the outside of said mandrel offers circumferential antiratchetting groove, and/or the number of said curved blade is an integer.
9. Small Centrifugal Fan according to claim 7 is characterized in that, said end face translot is arranged on the ear end face of said mandrel.
10. Small Centrifugal Fan according to claim 7; It is characterized in that; The front end that leans out the said main shaft of said mandrel is equipped with locking nut, and the said main shaft between motor boss and the mandrel is provided with packing ring, and the main shaft between mandrel and the locking nut is provided with back-up ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102145330A CN102705250A (en) | 2012-06-25 | 2012-06-25 | Minitype centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102145330A CN102705250A (en) | 2012-06-25 | 2012-06-25 | Minitype centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102705250A true CN102705250A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102145330A Pending CN102705250A (en) | 2012-06-25 | 2012-06-25 | Minitype centrifugal fan |
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| Country | Link |
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| CN (1) | CN102705250A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613006A (en) * | 2014-12-10 | 2015-05-13 | 张凤荣 | Wing sectional material combination type turbine centrifugal impeller |
| CN104791262A (en) * | 2015-03-28 | 2015-07-22 | 重庆通用工业(集团)有限责任公司 | Mechanical vapor recompression (MVR) energy-saving draught fan series model |
| CN110985411A (en) * | 2019-11-13 | 2020-04-10 | 北京北机机电工业有限责任公司 | Small centrifugal fan |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62111195A (en) * | 1985-11-07 | 1987-05-22 | Matsushita Seiko Co Ltd | Rotating shaft protecting device |
| US4943209A (en) * | 1988-07-11 | 1990-07-24 | Heil-Quaker Corporation | Hub for a plastic blower impeller |
| JP2000283092A (en) * | 1999-03-30 | 2000-10-10 | Snow Brand Milk Prod Co Ltd | Mounting structure of impeller to rotating shaft |
| CN2908877Y (en) * | 2006-04-29 | 2007-06-06 | 杭州日通风机有限公司 | Quickly dismounting connection mechanism of fan vane |
| CN201003513Y (en) * | 2006-12-15 | 2008-01-09 | 宁波方太厨具有限公司 | Centrifugal type fan |
| CN201723490U (en) * | 2010-07-22 | 2011-01-26 | 黄维伦 | Energy-saving environment-protective centrifugal blower |
| CN201763635U (en) * | 2010-05-18 | 2011-03-16 | 徐东旭 | Small power motor plastic fan with convenient assembly and disassembly |
-
2012
- 2012-06-25 CN CN2012102145330A patent/CN102705250A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62111195A (en) * | 1985-11-07 | 1987-05-22 | Matsushita Seiko Co Ltd | Rotating shaft protecting device |
| US4943209A (en) * | 1988-07-11 | 1990-07-24 | Heil-Quaker Corporation | Hub for a plastic blower impeller |
| JP2000283092A (en) * | 1999-03-30 | 2000-10-10 | Snow Brand Milk Prod Co Ltd | Mounting structure of impeller to rotating shaft |
| CN2908877Y (en) * | 2006-04-29 | 2007-06-06 | 杭州日通风机有限公司 | Quickly dismounting connection mechanism of fan vane |
| CN201003513Y (en) * | 2006-12-15 | 2008-01-09 | 宁波方太厨具有限公司 | Centrifugal type fan |
| CN201763635U (en) * | 2010-05-18 | 2011-03-16 | 徐东旭 | Small power motor plastic fan with convenient assembly and disassembly |
| CN201723490U (en) * | 2010-07-22 | 2011-01-26 | 黄维伦 | Energy-saving environment-protective centrifugal blower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613006A (en) * | 2014-12-10 | 2015-05-13 | 张凤荣 | Wing sectional material combination type turbine centrifugal impeller |
| CN104791262A (en) * | 2015-03-28 | 2015-07-22 | 重庆通用工业(集团)有限责任公司 | Mechanical vapor recompression (MVR) energy-saving draught fan series model |
| CN110985411A (en) * | 2019-11-13 | 2020-04-10 | 北京北机机电工业有限责任公司 | Small centrifugal fan |
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Application publication date: 20121003 |