CN107524622A - A kind of high-speed centrifugal fan - Google Patents
A kind of high-speed centrifugal fan Download PDFInfo
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- CN107524622A CN107524622A CN201710989333.5A CN201710989333A CN107524622A CN 107524622 A CN107524622 A CN 107524622A CN 201710989333 A CN201710989333 A CN 201710989333A CN 107524622 A CN107524622 A CN 107524622A
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- impeller
- centrifugal fan
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- speed centrifugal
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- 230000003014 reinforcing effect Effects 0.000 claims description 33
- 238000005266 casting Methods 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 36
- 238000013461 design Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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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 present invention relates to a kind of high-speed centrifugal fan, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor；The edge of back shroud of impeller intersects with the outer ledge of blade, and annular diffuser is fixed with the back side panel of casing, and the two surrounds circular groove, and back shroud of impeller is sunk in circular groove.Rotating speed >=10000rpm of the high-speed centrifugal fan of the present invention, efficiency >=65% of high-speed centrifugal fan.Diffuser is fixed on casing back side panel by the present invention, it forms impeller outlet diffuser with front shroud of impeller, impeller weight can be reduced, spin friction loss and the impeller centrifugal force caused by high speed rotates of diffuser are reduced again, impeller intensity is significantly enhanced, disclosure satisfy that the requirement of high rotating speed and high pressure.The high-speed centrifugal fan of the present invention, has that processing simple, low processing cost, matching requirements is low, good integral strength can meet high-revolving the characteristics of requiring.
Description
Technical field
The invention belongs to universal machine field of ventilation equipment, is related to a kind of high-speed centrifugal fan.
Background technology
Centrifugal blower is the pressure energy and kinetic energy that gas is converted to using the mechanical energy of draught fan impeller rotation, and gas is defeated
See off, gas is rotated through impeller and produces air energy along the streamlined air inlet air inlet through hollow shaft of blower fan, along screw type housing by gas
Body radially exports, then is sent out from shell air outlet.In centrifugal blower, gas is from axially into impeller, when gas flows through impeller
It is radially redirected, subsequently into diffuser.In diffuser, the gas and changing flow direction and increase of conduit section area makes
Flow slowing down, this decelerating effect convert kinetic energy into pressure energy.Pressure, which increases, to be occurred mainly in impeller, secondly occurs expanding
Press through journey.
Centrifugal blower essential structure is as shown in figure 1, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller
And motor, in the manufacture of existing Small Centrifugal Fan, blade, front shroud of impeller and back shroud of impeller are often integrally machined, its
Complicated integral structure, difficulty of processing is big, and generally requiring five axles and above machining center could process, and processing cost is higher, and by
Material properties limit, and bulk strength is poor, is only capable of meeting the slow-speed of revolution and the requirement of low-pressure；And, collection high for matching requirements
Stream device and impeller assembling gap cross conference and cause pressure leakage, it is difficult to ensure fan outlet pressure.
Therefore, a kind of processing of exploitation is simple, cost is cheap, matching requirements are low, good integral strength can meet high-revolving want
The great realistic meaning of high-speed centrifugal fan asked.
The content of the invention
The purpose of the present invention is to overcome that prior art centrifugal blower difficulty of processing is big, processing cost is low, matching requirements are high, whole
The defects of body intensity difference is difficult to meet the requirement of high rotating speed high pressure, there is provided one kind processing is simple, cost is cheap, matching requirements
Low, good integral strength can meet the high-speed centrifugal fan of high-revolving requirement.
To achieve the above object, the present invention is solved by the following technical programs：
A kind of high-speed centrifugal fan, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor；Institute
State back shroud of impeller for it is circular and with the output axis connection of motor, the blade circle distribution is after the impeller on cover plate；
The edge of the back shroud of impeller intersects with the outer ledge of blade, and the outer ledge of the blade refers to distance electricity
The central axis of machine output shaft is fixed with annular diffuser on farthest edge, the back side panel of the casing, and the two is surrounded
Circular groove, the back shroud of impeller are sunk in the circular groove, and diffuser is fixed on casing back side panel, impeller protecgulum
Plate forms impeller outlet diffuser together with diffuser, and this structure can reduce impeller weight, reduces the rotation of diffuser again
Turn friction loss, reduce impeller due to centrifugal force caused by high speed rotation, strengthen impeller intensity.
As preferable technical scheme：
A kind of high-speed centrifugal fan as described above, the one side of the back shroud of impeller are located at sky in the groove of circular groove
Between, another side flushes with the opening surface of circular groove, is sunk to or impeller bonnet if not flushing either back shroud of impeller part
Plate is excessively sunk in circular groove, and vortex, increase loss are easily produced when gas stream is out-of-date；The back shroud of impeller and circle are recessed
The distance between the center overlapping of axles of groove, the edge and circular groove inwall of the back shroud of impeller is 1~2mm, and the distance is main
To be configured according to machining accuracy and assembly precision, distance set conference to cause certain atmospheric pressure lost, and distance sets too small
Larger challenge can be brought to process and assemble.
A kind of high-speed centrifugal fan as described above, the front shroud of impeller separate with blade, the front shroud of impeller
Inside edge is connected with air inlet, and outer ledge is connected with the cylinder being fixed on air inlet, the front shroud of impeller, air inlet
It is smooth surface and the interior hollow cylinder gradually increased to both ends middle without leave to form an inwall with cylinder.This simplifies prophyll piece
The structure of integral piece, reduces difficulty of processing, reduces processing cost；And due to the reduction of difficulty of processing, available material
Material is more, is processed from the more excellent material of intensity, can lift bulk strength.
The distance between a kind of high-speed centrifugal fan, the front shroud of impeller two faces relative with blade as described above
The distance between≤1mm, front shroud of impeller two faces relative with blade is usually to be determined according to machining accuracy, is got in theory
It is small better, apart from it is excessive easily cause leaf top leakage loss it is larger, experiment shows, distance often increase 1mm, pressure about reduces
5%.
A kind of high-speed centrifugal fan as described above, the front shroud of impeller are provided around blade on the face relative with blade
Annular projection, the annular projection can substantially reduce leaf top leakage loss, and raised shape is not limited to ring-type or in leaf
Multiple projections of circumference uniform distribution on front shroud are taken turns, as long as raised position, which can play, reduces the leakage loss effect of leaf top.
A kind of high-speed centrifugal fan as described above, the annular projection are axially 0mm with the spacing of blade along itself, ring
Shape projection outer rim just wraps up vane nose, you can to reduce the leakage loss of leaf top, and does not stop that gas flows；The ring-type
The raised spacing along itself radially with blade is 1~2mm, and the spacing set conference to cause certain atmospheric pressure lost, set
It is small that process and assemble difficulty can be caused excessive, influence yields, the annular projection, front shroud of impeller, air inlet and cylinder one
Casting is welded with iron plate.
A kind of high-speed centrifugal fan as described above, the blade are fixed with reinforcement on the face relative with front shroud of impeller
Ring, with the intensity of reinforced blade and back shroud of impeller, the outer ledge of the reinforcing ring intersects with the outer ledge of blade, described
The outer ledge of reinforcing ring refers to apart from farthest edge, reinforcing ring outer ledge also may be used apart from the central axis of motor output shaft
There is no booster action more than blade outer rim, but beyond part, cause the waste of material.
A kind of high-speed centrifugal fan as described above, the reinforcing ring be laminated structure, the width of the reinforcing ring is 2~
5mm, reinforcement ring width is excessive, can stop that gas flows, the too small then stiffening effect of width is bad, the reinforcing ring, blade and leaf
Take turns back shroud entirety milling.
A kind of high-speed centrifugal fan as described above, the air inlet are cone arc, and cone arc air inlet gas flows damage
Lose small；The blade is circular arc type or airfoil type, and circular arc type vane efficiency is general, but processes relatively simple, wing blades effect
Rate is of a relatively high, but processes more complicated；
The back side panel of the casing is bolted to connection on the installing plate of motor.
A kind of high-speed centrifugal fan as described above, rotating speed >=10000rpm of high-speed centrifugal fan, high-speed centrifugal fan
Efficiency >=65%.
Invention mechanism：
The present invention is by the way that diffuser is fixed on casing back side panel so that front shroud of impeller forms ring together with diffuser
The impeller outlet diffuser of shape flow passage structure, increases runner circulation area, plays a part of deceleration diffusion, and the structure can
Impeller weight is reduced, further through stationary diffuser, reduces the spin friction loss of diffuser, reduces impeller due to high speed rotation production
Raw centrifugal force, strengthen impeller intensity.Meanwhile the present invention is by the way that air inlet, impeller cover and cylinder integration processing are realized
Front shroud of impeller separates with blade, on the one hand, reduces air inlet component, can play a part of anti-vortex ring, gas stream again
Go out impeller into after spiral case, slow down along spiral case diffusion and flow, improve flow field dynamics, reduce vortex, reduce machine
Large scale whirlpool in shell, improve fan efficiency, overcome centrifugal blower inner impeller front shroud in the prior art and case front it
Between area of space it is larger, gas outflow impeller after can this space produce vortex, cause energy loss, reduce fan efficiency
Problem, on the other hand, because impeller blade and back shroud of impeller are integrally machined, without front shroud of impeller, stress suffered by blower fan is big
Big to reduce, rotation speed of fan can bring up to more than 10000rpm, can effectively improve blower pressure.In addition, before the impeller of the present invention
Cover plate upper end is provided with an annular projection, it is possible to reduce the leakage loss of leaf top.
Beneficial effect：
(1) a kind of high-speed centrifugal fan of the invention, diffuser is fixed on casing back side panel, itself and front shroud of impeller
Form impeller outlet diffuser, you can to reduce impeller weight, the spin friction loss of reduction diffuser and impeller are due to height again
Centrifugal force caused by speed rotation, significantly enhances impeller intensity；
(2) a kind of high-speed centrifugal fan of the invention, blade is separated with front shroud of impeller, significantly reduces difficulty of processing
And processing cost, blade and back shroud of impeller integrally casting shaping, stress suffered by blower fan, which greatly reduces, can meet the high rotating speed of blower fan
Requirement, improve blower pressure；
(3) a kind of high-speed centrifugal fan of the invention, front shroud of impeller, air inlet and cylinder integrally casting shaping, both subtracted
Lack air inlet component, and it can play a part of anti-vortex ring again, reduce large scale whirlpool in casing, improve fan efficiency,
Reduce fan noise；
(4) a kind of high-speed centrifugal fan of the invention, have simple processing, low processing cost, matching requirements low, overall
Intensity can meet well high-revolving the characteristics of requiring.
Brief description of the drawings
Fig. 1 is the structural representation of the centrifugal blower of prior art；
Fig. 2 is a kind of structural representation of high-speed centrifugal fan of the present invention；
Fig. 3 is the partial enlarged drawing of A in Fig. 2；
Fig. 4 is the partial enlarged drawing of B in Fig. 2；
Fig. 5 is a kind of possible structural representation of the high-speed centrifugal fan of the present invention；
Fig. 6 is the local partial enlarged drawing of A in Fig. 5；
Fig. 7 is the structural representation of the hollow cylinder of front shroud of impeller, air inlet and the cylinder composition of the present invention；
Wherein 1- casings, 2- air inlets, 3- blades, 4- motors, 5- front shroud of impeller, 6- back shroud of impeller, 7- diffusers,
8- reinforcing rings, 9- cylinders, 10- annular projections.
Embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
Bright rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, art technology
Personnel can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Fixed scope.
Embodiment 1
A kind of high-speed centrifugal fan, as shown in Fig. 2 after including casing 1, air inlet 2, blade 3, front shroud of impeller 5, impeller
Cover plate 6, motor 4 and diffuser 7.
Casing 1 is the spiral shape unsymmetric structure of a bottom surface opening, and the back side panel of casing 1 is that not opening face is consolidated by bolt
Surely it is connected on the installing plate of motor 4, aperture position correspondingly bores arc air inlet 2, and the institute of blade 3 is completely covered in front shroud of impeller 5
The impeller of composition, impeller diameter 200mm, blade 3 are circular arc, and front shroud of impeller 5 and blade 3 are isolating construction, before impeller
The distance between two faces relative with blade 3 of cover plate 5 are 1mm, and the inside edge of front shroud of impeller 5 is connected with air inlet 2, outside
Lateral edges are connected with the cylinder 9 being fixed on air inlet 2, and it is smooth that front shroud of impeller 5, air inlet 2 and cylinder 9, which form an inwall,
Curved surface and the interior hollow cylinder as shown in Figure 7 gradually increased to both ends middle without leave, as shown in figure 3, front shroud of impeller 5 and leaf
Take turns the annular projection 10 that blade is provided around on 3 relative faces, annular projection 10 is 0mm with the spacing of blade vertically, ring-type
Projection 10 is radially 1mm with the spacing of blade, and the opposite side of blade 3 is disposed with back shroud of impeller 6, and the center of back shroud of impeller 6 is opened
There are through hole and the output axis connection with motor 4, the edge of back shroud of impeller intersects with the outer ledge of blade, the outer side edges of blade
Edge refers to the central axis apart from motor output shaft apart from farthest edge, as shown in figure 4, being fixed with the back side panel of casing 1
Annular diffuser 7, the two surrounds circular groove, and the one side of back shroud of impeller 6 is located at space in the groove of circular groove, another side with
The opening surface of circular groove flushes, the center overlapping of axles of back shroud of impeller and circular groove, edge and the circle of back shroud of impeller
The distance between groove inner wall is 1mm.
The 6 overall milling of blade 3 and back shroud of impeller, annular projection 10, front shroud of impeller 5, air inlet 2 and the one of cylinder 9
Casting, the back side panel of casing 1 are bolted to connection on the installing plate of motor 4.
The rotating speed of the high-speed centrifugal fan is 10100rpm, and the efficiency of high-speed centrifugal fan is 75.2%.Empirical tests, this hair
Bright high-speed centrifugal fan difficulty of processing is low, low processing cost, and bulk strength high energy meets high-revolving requirement, and design is closed
Reason, matching requirements are low.
Embodiment 2
A kind of high-speed centrifugal fan, as shown in figure 5, its basic structure is same as Example 1, difference is it in blade 3
Sheet reinforcing ring 8 is fixed with the face relative with front shroud of impeller 5, as shown in fig. 6, the outer ledge of reinforcing ring 8 and blade 3
Outer ledge intersects, and the outer ledge of reinforcing ring refers to that the central axis apart from motor output shaft apart from farthest edge, is strengthened
The width of ring 8 is 5mm, reinforcing ring 8, blade 3 and 6 overall milling of back shroud of impeller shaping, annular projection, front shroud of impeller 5, is entered
Air port 2 and cylinder are welded by iron plate.
The rotating speed of the high-speed centrifugal fan is 11000rpm, and the efficiency of high-speed centrifugal fan is 67%.With the phase of embodiment 1
Than the present embodiment enhances the bulk strength of high-speed centrifugal fan by increasing reinforcing ring.
Empirical tests, high-speed centrifugal fan difficulty of processing of the invention is low, low processing cost, and bulk strength is high, and design is closed
Reason, matching requirements are low.
Embodiment 3
A kind of high-speed centrifugal fan, its basic structure is same as Example 1, and difference is that blade is airfoil type, before impeller
The distance between cover plate two faces relative with blade are 0.8mm, and annular projection is 0mm with the spacing of blade vertically, ring-type
Projection is radially that the distance between 2mm, the edge and circular groove inwall of back shroud of impeller is 2mm with the spacing of blade.
The rotating speed of the high-speed centrifugal fan is 10000rpm, and the efficiency of high-speed centrifugal fan is 76%.Empirical tests, the present invention
High-speed centrifugal fan difficulty of processing it is low, low processing cost, bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 4
A kind of high-speed centrifugal fan, its basic structure is same as Example 1, and difference is that front shroud of impeller is relative with blade
The distance between two faces be 0.9mm, annular projection is 0mm with the spacing of blade vertically, annular projection radially with leaf
The spacing of piece is that the distance between 1.5mm, the edge and circular groove inwall of back shroud of impeller is 1.2mm.
The rotating speed of the high-speed centrifugal fan is 10500rpm, and the efficiency of high-speed centrifugal fan is 75.5%.Empirical tests, this hair
Bright high-speed centrifugal fan difficulty of processing is low, low processing cost, and bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 5
A kind of high-speed centrifugal fan, its basic structure is same as Example 1, and difference is that blade is airfoil type, before impeller
The distance between cover plate two faces relative with blade are 1mm, and annular projection is vertically 0mm with the spacing of blade, and ring-type is convex
It is radially that the distance between 1.8mm, the edge and circular groove inwall of back shroud of impeller is 1.5mm with the spacing of blade to rise.
The rotating speed of the high-speed centrifugal fan is 10200rpm, and the efficiency of high-speed centrifugal fan is 75.3%.Empirical tests, this hair
Bright high-speed centrifugal fan difficulty of processing is low, low processing cost, and bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 6
A kind of high-speed centrifugal fan, its basic structure is same as Example 3, and difference is it in blade and front shroud of impeller
Sheet reinforcing ring is fixed with relative face, the outer ledge of reinforcing ring intersects with the outer ledge of blade, the outside of reinforcing ring
Edge refers to central axis apart from motor output shaft apart from farthest edge, and the width of reinforcing ring is 2mm, reinforcing ring, blade
It is molded with the milling of back shroud of impeller entirety.
The rotating speed of the high-speed centrifugal fan is 11000rpm, and the efficiency of high-speed centrifugal fan is 72%.Empirical tests, the present invention
High-speed centrifugal fan difficulty of processing it is low, low processing cost, bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 7
A kind of high-speed centrifugal fan, its basic structure is same as Example 4, and difference is it in blade and front shroud of impeller
Sheet reinforcing ring is fixed with relative face, the outer ledge of reinforcing ring intersects with the outer ledge of blade, the outside of reinforcing ring
Edge refers to central axis apart from motor output shaft apart from farthest edge, and the width of reinforcing ring is 3.5mm, reinforcing ring, leaf
Piece and back shroud of impeller entirety milling shaping.
The rotating speed of the high-speed centrifugal fan is 11000rpm, and the efficiency of high-speed centrifugal fan is 70%.Empirical tests, the present invention
High-speed centrifugal fan difficulty of processing it is low, low processing cost, bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 8
A kind of high-speed centrifugal fan, its basic structure is same as Example 5, and difference is it in blade and front shroud of impeller
Sheet reinforcing ring is fixed with relative face, the outer ledge of reinforcing ring intersects with the outer ledge of blade, the outside of reinforcing ring
Edge refers to central axis apart from motor output shaft apart from farthest edge, and the width of reinforcing ring is 4mm, reinforcing ring, blade
It is molded with the milling of back shroud of impeller entirety.
The rotating speed of the high-speed centrifugal fan is 11200rpm, and the efficiency of high-speed centrifugal fan is 69%.Empirical tests, the present invention
High-speed centrifugal fan difficulty of processing it is low, low processing cost, bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 9
A kind of high-speed centrifugal fan, its basic structure is same as Example 1, and difference is its cover plate and impeller before the impeller
There is no annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping on relative face.
The rotating speed of the high-speed centrifugal fan is 10000rpm, and the efficiency of high-speed centrifugal fan is 75.1%.Empirical tests, this hair
Bright high-speed centrifugal fan difficulty of processing is low, low processing cost, and bulk strength is high, and reasonable in design, matching requirements are low.
Embodiment 10
A kind of high-speed centrifugal fan, its basic structure is same as Example 2, and difference is its cover plate and impeller before the impeller
There is no annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping on relative face.
The rotating speed of the high-speed centrifugal fan is 10500rpm, and the efficiency of high-speed centrifugal fan is 65%.Empirical tests, the present invention
High-speed centrifugal fan difficulty of processing it is low, low processing cost, bulk strength is high, and reasonable in design, matching requirements are low.
Claims (10)
1. a kind of high-speed centrifugal fan, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor, described
Back shroud of impeller for it is circular and with the output axis connection of motor, the blade circle distribution is after the impeller on cover plate, it is characterized in that：
The edge of the back shroud of impeller intersects with the outer ledge of blade, and the outer ledge of the blade refers to defeated apart from motor
The central axis of shaft is apart from farthest edge；
Annular diffuser is fixed with the back side panel of the casing, the two surrounds circular groove；
The back shroud of impeller is sunk in the circular groove.
2. a kind of high-speed centrifugal fan according to claim 1, it is characterised in that the one side of the back shroud of impeller is located at
Space in the groove of circular groove, another side flush with the opening surface of circular groove；In the back shroud of impeller and circular groove
Mandrel overlaps, and the distance between edge and circular groove inwall of the back shroud of impeller are 1~2mm.
3. a kind of high-speed centrifugal fan according to claim 1, it is characterised in that the front shroud of impeller and blade point
From the inside edge of the front shroud of impeller is connected with air inlet, and outer ledge is connected with the cylinder being fixed on air inlet, institute
State front shroud of impeller, air inlet and cylinder form an inwall be smooth surface and it is interior without leave among gradually increase to both ends it is hollow
Cylinder.
4. a kind of high-speed centrifugal fan according to claim 3, it is characterised in that the front shroud of impeller is relative with blade
The distance between two faces≤1mm.
5. a kind of high-speed centrifugal fan according to claim 4, it is characterised in that the front shroud of impeller is relative with blade
Face on be provided around the annular projection of blade.
A kind of 6. high-speed centrifugal fan according to claim 5, it is characterised in that the annular projection vertically with blade
Spacing be 0mm；The annular projection is radially 1~2mm with the spacing of blade；The annular projection, front shroud of impeller, enter
Air port and cylinder integrally casting shaping are welded with iron plate.
7. a kind of high-speed centrifugal fan according to claim 4, it is characterised in that the blade is relative with front shroud of impeller
Face on be fixed with reinforcing ring, the outer ledge of the reinforcing ring intersects with the outer ledge of blade, the outside of the reinforcing ring
Edge refers to the central axis apart from motor output shaft apart from farthest edge.
8. a kind of high-speed centrifugal fan according to claim 7, it is characterised in that the reinforcing ring is laminated structure, institute
The width for stating reinforcing ring is 2~5mm；The reinforcing ring, blade and back shroud of impeller entirety milling.
9. a kind of high-speed centrifugal fan according to claim 1, it is characterised in that the blade is circular arc type or wing
Type；The back side panel of the casing is bolted to connection on the installing plate of motor.
10. a kind of high-speed centrifugal fan according to any one of claim 1~9, it is characterised in that high-speed centrifugal fan
Rotating speed >=10000rpm, efficiency >=65% of high-speed centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989333.5A CN107524622A (en) | 2017-10-23 | 2017-10-23 | A kind of high-speed centrifugal fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989333.5A CN107524622A (en) | 2017-10-23 | 2017-10-23 | A kind of high-speed centrifugal fan |
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| Publication Number | Publication Date |
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| CN107524622A true CN107524622A (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710989333.5A Withdrawn CN107524622A (en) | 2017-10-23 | 2017-10-23 | A kind of high-speed centrifugal fan |
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| CN (1) | CN107524622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695586A (en) * | 2019-02-20 | 2019-04-30 | 苏州众志新环冷却设备有限公司 | Novel seal fan for offshore wind farm |
-
2017
- 2017-10-23 CN CN201710989333.5A patent/CN107524622A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695586A (en) * | 2019-02-20 | 2019-04-30 | 苏州众志新环冷却设备有限公司 | Novel seal fan for offshore wind farm |
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| PB01 | Publication | ||
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| CB02 | Change of applicant information | ||
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Address after: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Applicant after: SHANGHAI RICHEN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Applicant before: SHANGHAI RICHEN CO.,LTD. |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171229 |