CN101307778A - Centrifugal fan assembled guide vane vortex tongue structure - Google Patents
Centrifugal fan assembled guide vane vortex tongue structure Download PDFInfo
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- CN101307778A CN101307778A CNA2007100573963A CN200710057396A CN101307778A CN 101307778 A CN101307778 A CN 101307778A CN A2007100573963 A CNA2007100573963 A CN A2007100573963A CN 200710057396 A CN200710057396 A CN 200710057396A CN 101307778 A CN101307778 A CN 101307778A
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- tongue
- centrifugal cutter
- guide vane
- whirlpool
- stator
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Abstract
The invention discloses a combined guide vanes vortex tongue structure of a centrifugal fan. The centrifugal fan is a forward fan, the front of the vortex tongue are provided with a plurality of guide vanes to assist the vortex tongue, the distance from the guide vanes and the center of an impeller is growing gradually, the front guide vanes play the role of flow guiding and wind cutting, the amount of wind cutting of the back guide vanes is small. Although the clearance between the tongue vortex and the impeller is shrinking, the noise will not increase, the angle between the bottom linked line of each guide vane and an level surface is 10 to 15 degrees, while the angle between the vortex tongue and the level surface is greater than 90 degrees, the centrifugal fan can reduce the overall size, the best angle is 100 degrees to 110 degrees, at the same time, the guide vanes are curved, and one side of a forward vortex tongue is convex, and the guide vanes can rotate a certain angle. The combined guide vanes vortex tongue structure of the centrifugal fan of the invention can reduce the noise and the size of the fan, and, at the same time, make the fan exhaust more evenly.
Description
Technical field
The present invention relates to a kind of centrifugal cutter, the assembled guide vane vortex tongue structure of centrifugal cutter especially is provided.
Background technique
The centrifugal cutter of prior art be mostly the back to, promptly the bending direction of blade is opposite with the direction of air-flow, this centrifugal cutter has very tangible characteristics, be exactly that air quantity is very big, but static pressure is little.A lot of resistance parts are arranged in the centrifugal cutter, comprise vaporizer, electric heater and volute etc., the resistance parts form resistance to the air-flow in the centrifugal cutter, therefore need overcome resistance by static pressure, the effective way that overcomes the static pressure resistance be with afterwards to centrifugal cutter change the centrifugal cutter of forward direction into.The centrifugal cutter of forward direction is meant the centrifugal cutter that the bending direction of blade is consistent with the direction of air-flow, and the characteristics of the centrifugal cutter of forward direction are that air quantity is not very big, but static pressure is big, and higher static pressure can be provided, and is used to overcome bigger system resistance.In the practice,, need the blade more than 43, need motor that very high torque is arranged simultaneously, that is to say, do more merit, need more energy in order to improve air quantity.The experiment that this is carried out, effect are very undesirable.
Simultaneously, as shown in Figure 1, it is thin again that blade is done, and physical thickness is also arranged, when last blade during near the wedge angle of whirlpool tongue 1, this blade and wedge angle distance are very little, blocked air-flow, wind just blows less than wedge angle, in this of short duration time, form the noise of whirlpool tongue 1 and impeller 3, academicly claimed the abnormal sound (BPF) that produces when this skims over whirlpool tongue 1 for blade.Each blade carries out the synchronism running one by one, has produced pulsing airflow, and pulsing airflow has produced pulsation again, thereby the abnormal sound under the certain frequency has just been arranged.
There is the defective that air quantity is little, noise is big in the centrifugal cutter of prior art, this be because:
At first, the whirlpool tongue 1 of prior art centrifugal cutter has only one, and whirlpool tongue 1 is too little from the gap of impeller 3 external diameters, and then fan noise increases severely; If the gap is too big, then air quantity reduces.Consider under the situation of noise, require to guarantee enough big whirlpool tongue 1 gap.
Secondly, whirlpool tongue 1 position and horizontal sextant angle are less than or equal to 90 degree.Angle too conference causes internal vortex.Require the integral width of fan to want big.
In addition, the easy sideslip of air-flow, deflection is near a side at tongue 1 place, whirlpool, and outwards exhaust is inhomogeneous.
Summary of the invention
Technical problem to be solved by this invention is, a kind of noise and size that can reduce fan is provided, and makes the exhaust of fan more even simultaneously.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Assembled guide vane vortex tongue structure as a kind of centrifugal cutter of the present invention, centrifugal cutter is the forward direction fan, this tongue the place ahead, whirlpool adopts a plurality of stators to assist the whirlpool tongue, stator is cumulative apart from the distance at impeller center, the stator of front plays the effect of water conservancy diversion and wind cutting, the stator wind cutting amount of back is little, though the gap smaller of whirlpool tongue and impeller, noise can not increase yet.
And, each stator lower end line and horizontal plane updip 10 to 15 degree angles.
As a kind of improvement of the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention, this tongue position, whirlpool and horizontal sextant angle are greater than 90 degree, and centrifugal cutter can reduce overall dimensions.
And this tongue position, whirlpool and horizontal sextant angle are that 100 degree are to 110 degree.
As the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention, this stator is a curved shape, and preceding whirlpool tongue one side projection.
And this stator can turn an angle.
The invention has the beneficial effects as follows:
At first, a plurality of stators play the effect of water conservancy diversion, and flowing in the volute is more steady.
Secondly, the gap of the stator of front and whirlpool tongue 1 is big, and in the process of wind cutting, the noise of generation is little.The stator of back needs the wind cutting amount little, though the whirlpool tongue room is little, noise can not increase yet.
In addition, whirlpool tongue 1 gap of last is very little, so the air quantity after improving can be bigger than the air quantity of conventional fan.
Whole structure is exactly, and air quantity increases, and noise does not increase.
Description of drawings
Fig. 1 is the assembled guide vane vortex tongue structure of prior art centrifugal cutter
Fig. 2 is the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention
Among the figure:
1: whirlpool tongue 2: stator
3: stator 4: housing 5: blade
Embodiment
Be described in further detail below in conjunction with the assembled guide vane vortex tongue structure of the drawings and specific embodiments a kind of centrifugal cutter of the present invention:
As shown in Figure 2, in the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention, centrifugal cutter comprises housing 4, impeller 3 and whirlpool tongue 1.Housing 4 is made for unsaturated polyester resin and next fiber, constitute by two volutes, two involutory back and fixing seals of volutes, form cavity, have the screw type air channel in the cavity, be referred to as collector ring, be provided with inlet or eyelet at the middle part of collector ring, housing 4 tops have outlet, and outlet top is provided with parts such as vaporizer, and the air-flow that centrifugal cutter provides carries out energy interchange at vaporizer.Impeller 3 is arranged on the collector ring central authorities of housing 4, and impeller 3 peripheries are being provided with blade 5, and impeller 3 is connecting the live axle of motor.From the outside, whirlpool tongue 1 is a concave surface on housing 4 tops, and from section, whirlpool tongue 1 has the bottom to adapt to the shape of impeller 3, then is open gradually upwards.
In the centrifugal cutter, air is axial along impeller 3, flows into housing 4 through inlet, arrives between the impeller 3 periphery upper blades 5, place at impeller under the effect of rotation, gas blade 5 is thrown out of the leaf road, because 5 pairs of gases of blade have been done merit, gas has had suitable energy, pressure is greatly improved, gas compiles in the collector ring, and is transformed into along the collector ring direction and moves, and finally flows to outlet and also is discharged from.
In the assembled guide vane vortex tongue structure of a kind of centrifugal cutter of the present invention, centrifugal cutter is the forward direction fan, this tongue the place ahead, whirlpool adopts a plurality of stators 2 to assist whirlpool tongue 1, stator 2 is cumulative apart from the distance at impeller 3 centers, the stator 2 of front plays the effect of water conservancy diversion and wind cutting, the stator 2 wind cutting amounts of back are little, though the gap smaller of whirlpool tongue 1 and impeller 3, noise can not increase yet.Guide vane 2 spacings make out the air-flow of spiral case exhaust outlet more even in the ratio adjustment of air quantity.
Because housing 4 is made involute shape, itself promptly have the effect of all pressing, because air-flow is to be flowed to low pressure by high pressure, and by continuous diffusion, this design can reach: stator 2 is risen progressively from whirlpool tongue 1 forward successively.That is to say, can realize shunting successively gas.
And through repeatedly facts have proved, are advisable in each stator 2 lower end line and horizontal plane updip 10 to 15 degree angles.
In the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention, whirlpool tongue 1 position and horizontal sextant angle are greater than 90 degree, and centrifugal cutter can reduce overall dimensions.
And through repeatedly practising proof, this whirlpool tongue 1 position and horizontal sextant angle are that 100 degree to 110 degree are good.
In the assembled guide vane vortex tongue structure of centrifugal cutter of the present invention, stator 2 is a curved shape, and preceding whirlpool tongue 1 one side projectioies.The resistance of Chan Shenging is few like this, and, avoided air-flow to move to whirlpool tongue 1 one lateral deviations, played corrective function to airflow direction.
And this stator 2 can turn an angle, like this, under the effect of wind-force, can swing offset, reach an angle, realize dynamic balancing, at this moment, fluid is in the self adaption state, and it is minimum that the loss minimum that resistance causes, energy loss also reach.Also can allow the own levellings weighing apparatus of stator 2 earlier, be fixed up again after reaching balance.
Claims (6)
1, a kind of assembled guide vane vortex tongue structure of centrifugal cutter, centrifugal cutter is the forward direction fan, centrifugal cutter comprises housing, impeller and whirlpool tongue, it is characterized in that: described whirlpool tongue (1) the place ahead adopts a plurality of stators (2) to assist whirlpool tongue (1), stator (2) is cumulative apart from the distance at impeller (3) center, the stator of front (2) plays the effect of water conservancy diversion and wind cutting, and the stator of back (2) wind cutting amount is little.
2, the assembled guide vane vortex tongue structure of centrifugal cutter according to claim 1 is characterized in that: described each stator (2) lower end line and horizontal plane updip 10 to 15 degree angles.
3, the assembled guide vane vortex tongue structure of centrifugal cutter according to claim 2 is characterized in that: tongue (1) position, described whirlpool and horizontal sextant angle are greater than 90 degree.
4, the assembled guide vane vortex tongue structure of centrifugal cutter according to claim 3 is characterized in that: tongue (1) position, described whirlpool and horizontal sextant angle are that 100 degree are to 110 degree.
5, the assembled guide vane vortex tongue structure of centrifugal cutter according to claim 1 is characterized in that: described stator (2) is a curved shape, and preceding whirlpool tongue (1) one side projection.
6, the assembled guide vane vortex tongue structure of centrifugal cutter according to claim 5 is characterized in that: described stator (2) can turn an angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100573963A CN101307778A (en) | 2007-05-18 | 2007-05-18 | Centrifugal fan assembled guide vane vortex tongue structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100573963A CN101307778A (en) | 2007-05-18 | 2007-05-18 | Centrifugal fan assembled guide vane vortex tongue structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101307778A true CN101307778A (en) | 2008-11-19 |
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ID=40124380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100573963A Pending CN101307778A (en) | 2007-05-18 | 2007-05-18 | Centrifugal fan assembled guide vane vortex tongue structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101307778A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235383A (en) * | 2010-04-26 | 2011-11-09 | 宁波龙泰电讯电机有限公司 | Forward centrifugal fan |
| CN102478025A (en) * | 2010-11-29 | 2012-05-30 | 富瑞精密组件（昆山）有限公司 | Radiating device and centrifugal fan thereof |
| WO2016206474A1 (en) * | 2015-06-24 | 2016-12-29 | 合肥华凌股份有限公司 | Enclosure component used in air cooled refrigerator, air cooled refrigerator, and enclosure component designing method |
| CN106438482A (en) * | 2016-09-30 | 2017-02-22 | 宁波方太厨具有限公司 | Volute and centrifugal fan using same |
| CN104675754B (en) * | 2013-12-02 | 2017-11-07 | 海尔集团公司 | The method that cabinet-type air conditioner spiral case gas-tight is lost in speed |
| CN109268311A (en) * | 2018-11-26 | 2019-01-25 | 江苏徐工工程机械研究院有限公司 | Centrifugal Fan Impeller and centrifugal fan |
| CN112253495A (en) * | 2020-09-11 | 2021-01-22 | 宁波方太厨具有限公司 | Fan system and range hood with same |
-
2007
- 2007-05-18 CN CNA2007100573963A patent/CN101307778A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235383A (en) * | 2010-04-26 | 2011-11-09 | 宁波龙泰电讯电机有限公司 | Forward centrifugal fan |
| CN102478025A (en) * | 2010-11-29 | 2012-05-30 | 富瑞精密组件（昆山）有限公司 | Radiating device and centrifugal fan thereof |
| CN102478025B (en) * | 2010-11-29 | 2016-04-27 | 富瑞精密组件（昆山）有限公司 | Sink and centrifugal cutter thereof |
| CN104675754B (en) * | 2013-12-02 | 2017-11-07 | 海尔集团公司 | The method that cabinet-type air conditioner spiral case gas-tight is lost in speed |
| WO2016206474A1 (en) * | 2015-06-24 | 2016-12-29 | 合肥华凌股份有限公司 | Enclosure component used in air cooled refrigerator, air cooled refrigerator, and enclosure component designing method |
| CN106438482A (en) * | 2016-09-30 | 2017-02-22 | 宁波方太厨具有限公司 | Volute and centrifugal fan using same |
| CN109268311A (en) * | 2018-11-26 | 2019-01-25 | 江苏徐工工程机械研究院有限公司 | Centrifugal Fan Impeller and centrifugal fan |
| CN109268311B (en) * | 2018-11-26 | 2023-10-03 | 江苏徐工工程机械研究院有限公司 | Centrifugal fan impeller and centrifugal fan |
| CN112253495A (en) * | 2020-09-11 | 2021-01-22 | 宁波方太厨具有限公司 | Fan system and range hood with same |
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Open date: 20081119 |