CN206071928U - A kind of improved centrifugal blower rotating stall experimental provision - Google Patents
A kind of improved centrifugal blower rotating stall experimental provision Download PDFInfo
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- CN206071928U CN206071928U CN201621034066.3U CN201621034066U CN206071928U CN 206071928 U CN206071928 U CN 206071928U CN 201621034066 U CN201621034066 U CN 201621034066U CN 206071928 U CN206071928 U CN 206071928U
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- spiral case
- baffle
- hydraulic stem
- centrifugal blower
- air
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Abstract
The utility model discloses a kind of improved centrifugal blower rotating stall experimental provision, including spiral case, impeller is installed in spiral case, several first jets are evenly arranged with the medial surface of spiral case, first jet bottom is provided with base, first hydraulic stem is provided with inside first jet axially, first hydraulic stem is arranged on base, several first baffles are connected with by the first spring body between first hydraulic stem and the inwall of first jet, guiding gutter is set on first baffle, slide in guiding gutter and be provided with sheet metal, sheet metal is provided centrally with first through hole, rubber membrane is provided with first through hole；The medial surface of spiral case is additionally provided with several second baffles, and first jet is arranged alternately with second baffle, and several crossbeams are provided with second baffle, is connected between two crossbeams and is provided with air bag.This utility model can improve the deficiencies in the prior art, realize the Whole Process Simulation of centrifugal blower rotating stall.
Description
Technical field
This utility model is related to a kind of centrifugal blower rotating stall detection technique field, especially a kind of improved centrifugation wind
Machine rotating stall experimental provision.
Background technology
Rotating stall is a kind of centrifugal blower UNSTEADY FLOW phenomenon that impeller internal occurs under low flow rate condition.Rotation
After stall occurs, there are one or several circumferentially rotatable stall groups in impeller internal, its rotary speed is less than impeller rotation speed
Degree, can produce extra aerodynamic loading and aerodynamic noise, may induce the fatigue at blade high stress point and fracture is asked when serious
Topic, have impact on the range of application of centrifugal blower.In addition, rotating stall phenomenon may cause surge, cause fan body and connection
The vibration of pipeline, cause the accident hidden danger.But, the experimental provision in prior art for centrifugal blower rotating stall cannot be to wind
Machine running status carries out Whole Process Simulation, and Chinese utility model patent CN 103410762B discloses a kind of centrifugal blower rotation
Stall control device and method, utility model people are researched and developed to stall experimental provision based on this device.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of improved centrifugal blower rotating stall experimental provision, energy
The deficiencies in the prior art are enough solved, the Whole Process Simulation of centrifugal blower rotating stall is realized.
To solve above-mentioned technical problem, technical solution adopted in the utility model is as follows.
A kind of improved centrifugal blower rotating stall experimental provision, including spiral case, are provided with impeller, in spiral case in spiral case
Medial surface is evenly arranged with several first jets, and first jet bottom is provided with base, is axially provided with inside first jet
First hydraulic stem, the first hydraulic stem are arranged on base, pass through the first spring between the first hydraulic stem and the inwall of first jet
Body is connected with several first baffles, arranges slip in guiding gutter, guiding gutter and is provided with sheet metal, in sheet metal on first baffle
The heart is provided with first through hole, and rubber membrane is provided with first through hole；The medial surface of spiral case is additionally provided with several second baffles, the
One nozzle is arranged alternately with second baffle, and several crossbeams are provided with second baffle, is connected between two crossbeams and is provided with gas
Capsule；Inlet side impeller and air side impeller are respectively arranged with the air inlet and air outlet of spiral case.
Preferably, the first jet is connected to the medial surface of spiral case by universal joint.
Preferably, the first spring body internal activity is provided with rubber column, the first spring body is matched somebody with somebody with rubber column interference
Close, rubber column is fixed on the second hydraulic stem, the second hydraulic stem be arranged on the side wall of the first hydraulic stem or first jet it is interior
On wall.
Preferably, the second baffle is flexibly connected with spiral case, it is provided with second baffle and the contact surface of spiral case close
Strip of paper used for sealing, spiral case outside screw are connected with adjusting rod, and adjusting rod is connected by bearing with second baffle.
Preferably, the sealing strip is provided with arc groove with the lateral surface of air flow contacts.
Preferably, the inlet side impeller is connected with inlet side blade by the 3rd hydraulic stem, the 3rd hydraulic stem is installed
In the outfan of electric rotating machine, electric rotating machine is arranged on the rotating disk of inlet side.
Preferably, the air outlet of the spiral case is provided with second nozzle, air-out direction and the air-out lateral lobe of second nozzle
The blade of wheel is mutually perpendicular to.
Preferably, the snail tongue position of spiral case arranges fluted, third baffle in groove, is movably set with, third baffle sets
Put on the 4th hydraulic stem.
A kind of detection method of above-mentioned improved centrifugal blower rotating stall experimental provision, comprises the following steps：
A, startup impeller, make blower fan enter stable running status；
B, the spray air flow for changing first jet and jet direction, and gradually change the contact angle of first baffle and air-flow
Degree, makes the running status of blower fan carry out successional change；
C, enter during Line Continuity changes in fan condition, change the work shape of inlet side impeller and air side impeller
State, realizes for the change of blower fan air-suction state and exhaust condition；
D, collection casing inner wall gas-dynamic pressure signal；SDP conversion is carried out to pressure signal, blower fan is set up and is normally run
And the SDP image templates under stall conditions；
E, the dynamic pressure signal chosen in several sampled point time periods of blower fan carry out SDP conversion, carry out with Prototype drawing
Images match, is carried out once every several sampled points, successively pusher, until blower fan, by complete stall is normally run to, is carried out
Blower fan rotating stall real-time detection.
Using the beneficial effect brought by above-mentioned technical proposal it is：This utility model is entered to impeller by first jet
Row jet, thus it is possible to vary the stream condition in spiral case.By the contact angle and first jet that change first baffle and air-flow
Spray angle, it is possible to achieve for spiral case interior air-flow flow direction precise control.Rubber membrane is different in first baffle both sides air pressure
In the state of can produce corresponding elastic deformation so that air-flow produce perpendicular to first baffle components of flow.Rubber column can
To realize the regulation of rotary damping of the first baffle in the case where air-flow air blast effect is received.Second baffle is used for reducing first jet pair
Unstable air flow component produced by air-flow carries out regulation process.Arc groove on sealing strip is used for reducing air-flow the
Two baffle plates and the negative pressuren zone of the junction generation of spiral case, improve the uniformity of the air pressure change in spiral case.Inlet side impeller and go out
Wind lateral lobe wheel is realized for the adjustment of blower fan air-suction state and exhaust condition.
Detection method disclosed in the utility model can be simulated to the universe of the centrifugal blower course of work and detect,
So as to realize for the real-time detection of fan stall state.SDP image templates can effectively reduce blower fan under stall conditions and be produced
Raw interference signal component, improves the accuracy of comparison and detection.
Description of the drawings
Fig. 1 is the structure chart of one specific embodiment of this utility model.
Fig. 2 is the structure chart of first jet in one specific embodiment of this utility model.
Fig. 3 is the structure chart of first baffle in one specific embodiment of this utility model.
Fig. 4 is the structure chart in one specific embodiment of this utility model inside the first spring body.
Fig. 5 is the structure chart of second baffle in one specific embodiment of this utility model.
Fig. 6 is the structure chart of inlet side impeller in one specific embodiment of this utility model.
Fig. 7 is the structure chart of snail tongue position in one specific embodiment of this utility model.
In figure：1st, spiral case；2nd, impeller；3rd, first jet；4th, the first hydraulic stem；5th, the first spring body；6th, first baffle；7、
Guiding gutter；8th, sheet metal；9th, first through hole；10th, rubber membrane；11st, second baffle；12nd, crossbeam；13rd, air bag；14th, air intake lateral lobe
Wheel；15th, air side impeller；16th, base；17th, universal joint；18th, rubber column；19th, the second hydraulic stem；20th, sealing strip；21st, adjust
Bar；22nd, arc groove；23rd, the 3rd hydraulic stem；24th, electric rotating machine；25th, inlet side rotating disk；26th, second nozzle；27th, groove；
28th, third baffle；29th, the 4th hydraulic stem；30th, the second through hole；31st, inclined-plane；32nd, fillet；33rd, inlet side blade.
Specific embodiment
The standardized element arrived used in this utility model can commercially, and shaped piece is according to description and attached
The record of figure can carry out it is customized, the concrete connected mode of each part using bolt ripe in prior art, rivet,
The conventional meanses such as welding, stickup, will not be described in detail herein.
Reference picture 1-7, the present embodiment include spiral case 1, be provided with impeller 2, uniformly set in the medial surface of spiral case 1 in spiral case 1
Several first jets 3 are equipped with, 3 bottom of first jet is provided with base 16, and the first hydraulic pressure is axially provided with inside first jet 3
Bar 4, the first hydraulic stem 4 are arranged on base 16, pass through the first spring body 5 between the first hydraulic stem 4 and the inwall of first jet 3
Several first baffles 6 are connected with, guiding gutter 7 is set on first baffle 6, sliding in guiding gutter 7 is provided with sheet metal 8, metal
Piece 8 is provided centrally with first through hole 9, and rubber membrane 10 is provided with first through hole 9；The medial surface of spiral case 1 is additionally provided with several
Second baffle 11, first jet 3 are arranged alternately with second baffle 11, and several crossbeams 12 are provided with second baffle 11, are connected
Air bag 13 is provided between two crossbeams 12；Inlet side impeller 14 is respectively arranged with the air inlet and air outlet of spiral case 1 and is gone out
Wind lateral lobe wheel 15.Jet is carried out to impeller by first jet, thus it is possible to vary the stream condition in spiral case.First jet 3 passes through
Universal joint 17 is connected to the medial surface of spiral case 1.By the contact angle and the spray of first jet that change first baffle and air-flow
Firing angle degree, it is possible to achieve for the precise control of spiral case interior air-flow flow direction.Rubber membrane is in the different shape of first baffle both sides air pressure
Corresponding elastic deformation can be produced under state, so that air-flow produces the components of flow perpendicular to first baffle.In first spring body 5
Portion is movably set with rubber column 18, the first spring body 5 and 18 interference fit of rubber column, and rubber column 18 is fixed on the second hydraulic stem 19
On, the second hydraulic stem 19 is arranged on the side wall of the first hydraulic stem 4 or on the inwall of first jet 3.Rubber column can realize
The regulation of rotary damping of one baffle plate in the case where air-flow air blast effect is received.Second baffle 11 is flexibly connected with spiral case 1, second baffle
11 with the contact surface of spiral case 1 on be provided with sealing strip 20,1 outside screw of spiral case is connected with adjusting rod 21, adjusting rod 21 and second
Baffle plate 11 is connected by bearing.Sealing strip 20 is provided with arc groove 22 with the lateral surface of air flow contacts.Second baffle is used for dropping
Low first jet carries out unstable air flow component produced in regulation process for air-flow.Arc groove on sealing strip is used for
Air-flow is reduced in second baffle and the negative pressuren zone of the junction generation of spiral case, the uniformity of the air pressure change in spiral case is improved.Enter
Wind lateral lobe wheel 14 is connected with inlet side blade 33 by the 3rd hydraulic stem 23, and the 3rd hydraulic stem 23 is arranged on the defeated of electric rotating machine 24
Go out end, electric rotating machine 24 is arranged on inlet side rotating disk 25.The air outlet of spiral case 1 is provided with second nozzle 26, second nozzle 26
Air-out direction be mutually perpendicular to the blade of air side impeller 15.Inlet side impeller and air side impeller are realized for blower fan air inlet
The adjustment of state and exhaust condition.
The snail tongue position of spiral case 1 arranges fluted 27, is movably set with third baffle 28 in groove 27, and third baffle 28 sets
Put on the 4th hydraulic stem 29.In addition, several the second through holes 30 are provided with third baffle 28, the medial wall of groove 27 is oblique
Face 31, the spacing on inclined-plane 31 are gradually reduced to bottom by the top of groove 27, and the top of groove 27 is provided with fillet 32.By
The third gear plate that can be moved up and down is provided with snail tongue, active regulation can be carried out to the flow operating mode of blower fan interior air-flow, from
And realize that blower fan can be at stall critical state, experimental provision is improve for what fan condition was simulated is comprehensive, research worker
The various critical parameters of fan operation state can be obtained from stall critical state, the reasonability of fan design is improved.
A kind of detection method of above-mentioned improved centrifugal blower rotating stall experimental provision, comprises the following steps：
A, startup impeller, make blower fan enter stable running status；
B, the spray air flow for changing first jet and jet direction, and gradually change the contact angle of first baffle and air-flow
Degree, makes the running status of blower fan carry out successional change；
C, enter during Line Continuity changes in fan condition, change the work shape of inlet side impeller and air side impeller
State, realizes for the change of blower fan air-suction state and exhaust condition；
D, collection casing inner wall gas-dynamic pressure signal；SDP conversion is carried out to pressure signal, blower fan is set up and is normally run
And the SDP image templates under stall conditions；
E, the dynamic pressure signal chosen in several sampled point time periods of blower fan carry out SDP conversion, carry out with Prototype drawing
Images match, is carried out once every several sampled points, successively pusher, until blower fan, by complete stall is normally run to, is carried out
Blower fan rotating stall real-time detection.
Wherein SDP is the abbreviation of symmetrical dot pattern (Symmetrized Dot Pattern).By small wave converting method from
Line test experience signal stall inception point, verifies the accuracy of this method.As a result show：The method can be accurately examined in 0.35s
Measure weak stall inception point；Strong stall inception point is detected in 0.05s accurately.
Ultimate principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Simply illustrate principle of the present utility model, on the premise of without departing from this utility model spirit and scope, this utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed this utility model.This utility model
Claimed scope is by appending claims and its equivalent thereof.
Claims (8)
1. impeller (2) is installed in a kind of improved centrifugal blower rotating stall experimental provision, including spiral case (1), spiral case (1),
It is characterized in that：Several first jets (3) are evenly arranged with the medial surface of spiral case (1), first jet (3) bottom is provided with
Base (16), first jet (3) is internal to be axially provided with the first hydraulic stem (4), and the first hydraulic stem (4) is installed in base (16)
On, several first baffles are connected with by the first spring body (5) between the inwall of the first hydraulic stem (4) and first jet (3)
(6), arrange to slide in guiding gutter (7), guiding gutter (7) on first baffle (6) and be provided with sheet metal (8), sheet metal (8) center sets
First through hole (9) is equipped with, rubber membrane (10) in first through hole (9), is provided with；The medial surface of spiral case (1) be additionally provided with several
Two baffle plates (11), first jet (3) are arranged alternately with second baffle (11), and second baffle is provided with several crossbeams on (11)
(12), it is connected between two crossbeams (12) and is provided with air bag (13)；The air inlet and air outlet of spiral case (1) be respectively arranged with into
Wind lateral lobe wheel (14) and air side impeller (15).
2. improved centrifugal blower rotating stall experimental provision according to claim 1, it is characterised in that：First spray
Mouth (3) is connected to the medial surface of spiral case (1) by universal joint (17).
3. improved centrifugal blower rotating stall experimental provision according to claim 2, it is characterised in that：First bullet
Spring body (5) internal activity is provided with rubber column (18), the first spring body (5) and rubber column (18) interference fit, rubber column (18)
It is fixed on the second hydraulic stem (19), the second hydraulic stem (19) is on the side wall of the first hydraulic stem (4) or first jet (3)
Inwall on.
4. improved centrifugal blower rotating stall experimental provision according to claim 1, it is characterised in that：The second gear
Plate (11) is flexibly connected with spiral case (1), is provided with sealing strip (20), spiral case on second baffle (11) and the contact surface of spiral case (1)
(1) outside screw is connected with adjusting rod (21), and adjusting rod (21) is connected by bearing with second baffle (11).
5. improved centrifugal blower rotating stall experimental provision according to claim 4, it is characterised in that：The sealing strip
(20) lateral surface of air flow contacts is provided with arc groove (22).
6. improved centrifugal blower rotating stall experimental provision according to claim 1, it is characterised in that：The air intake
Lateral lobe wheel (14) is connected with inlet side blade (33) by the 3rd hydraulic stem (23), and the 3rd hydraulic stem (23) is installed in electric rotating machine
(24) outfan, electric rotating machine (24) is on inlet side rotating disk (25).
7. improved centrifugal blower rotating stall experimental provision according to claim 1, it is characterised in that：The spiral case
(1) air outlet is provided with second nozzle (26), the air-out direction of second nozzle (26) and the blade phase of air side impeller (15)
It is mutually vertical.
8. improved centrifugal blower rotating stall experimental provision according to claim 1, it is characterised in that：The spiral case
(1) snail tongue position arranges fluted (27), and third baffle (28) is movably set with groove (27), and third baffle (28) is arranged
On the 4th hydraulic stem (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621034066.3U CN206071928U (en) | 2016-08-22 | 2016-08-22 | A kind of improved centrifugal blower rotating stall experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621034066.3U CN206071928U (en) | 2016-08-22 | 2016-08-22 | A kind of improved centrifugal blower rotating stall experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206071928U true CN206071928U (en) | 2017-04-05 |
Family
ID=58436652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621034066.3U Expired - Fee Related CN206071928U (en) | 2016-08-22 | 2016-08-22 | A kind of improved centrifugal blower rotating stall experimental provision |
Country Status (1)
| Country | Link |
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| CN (1) | CN206071928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246587A (en) * | 2016-08-22 | 2016-12-21 | 华北电力大学（保定） | The centrifugal blower rotating stall experimental provision of a kind of improvement and detection method thereof |
-
2016
- 2016-08-22 CN CN201621034066.3U patent/CN206071928U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246587A (en) * | 2016-08-22 | 2016-12-21 | 华北电力大学（保定） | The centrifugal blower rotating stall experimental provision of a kind of improvement and detection method thereof |
| CN106246587B (en) * | 2016-08-22 | 2017-10-13 | 华北电力大学（保定） | A kind of improved centrifugal blower rotating stall experimental provision and its detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 Termination date: 20170822 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |