CN107100886A - The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects - Google Patents
The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects Download PDFInfo
- Publication number
- CN107100886A CN107100886A CN201710182613.5A CN201710182613A CN107100886A CN 107100886 A CN107100886 A CN 107100886A CN 201710182613 A CN201710182613 A CN 201710182613A CN 107100886 A CN107100886 A CN 107100886A
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- CN
- China
- Prior art keywords
- blade
- alford
- closure
- wheel
- rim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
Abstract
The invention provides a kind of blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects, including impeller, blade wheel chamber, stator, stator room, pump shaft, foil gauge and Alford force measuring systems, the impeller includes wheel hub, water guide cone and 3~5 blades, blade is axially uniformly distributed along wheel hub, foil gauge is arranged at the wheel rim of blade, blade with the through hole that is connected is offered on wheel hub, the connecting line of foil gauge is connected through through hole with the Alford force measuring systems being located in wheel hub, signal pickup assembly is arranged in blade wheel chamber, and with calculating mechatronics；The present invention realizes mixed-flow pump blade rim measurement of exciting force under Alford effects in the case where not changing mixed-flow pump flow passage structure and not influenceing Real Flow Field state status, more accurate, more can comprehensively grasp the fluid flow state at impeller blade wheel rim.
Description
Technical field
The present invention relates under fluid machinery (pump) internal flow technical field, more particularly to a kind of measurable Alford effects
The blade wheel structure of mixed-flow pump blade rim exciting force.
Background technology
Alford effects are that nineteen sixty-five Alford takes the lead in finding when studying axial turbine rotating machinery, and the effect is
Because the eccentric operating of impeller causes blade tip clearance skewness and not cause to load suffered by each blade not etc. and week along the circumferential direction
It is uneven to pressure distribution, thereby produce a kind of lateral fluid exciting force perpendicular to impeller eccentric direction, i.e., it is famous
" Alford power ", and the leakage stream of the blade tip clearance of blade is then the root for producing this fluid exciting force.
Large-scale mixed-flow pump has been field irrigation, urban water supply and sewerage, power industry, nuclear energy power generation, naval vessel propulsion, guided missile hair
Penetrate and the Major Strategic engineering such as the south water to north in core drive equipment.Because mixed-flow pump impeller can not be kept away in casting and processing
The presence mass unbalance exempted from, it operationally easily causes the eccentric whirling motion of impeller to rotate, and causes mixed-flow pump blade tip clearance week
To skewness, so that blade tip clearance exciting force is circumferentially distributed also inconsistent, lure that self-excited vibration occurs for impeller into, seriously
When cause impeller to touch with housing to rub or kill, cause mixed flow pump operation unstability, threaten the operation safety of unit.
In order to study influence of the Alford power to large-scale mixed-flow pump operation stability and performance, it is necessary to be carried out to Alford power
Accurate measurement, but up to now, a kind of apparatus and method that can effectively measure Alford effect lower rim exciting forces are also not
See relevant report.
Application No. 2015100258111, a kind of entitled " water jet propulsion pump knot of measurable blade dynamic excitation power
The patent of structure " forms 6 Wheatstone bridges to measure water spray by posting 24 foil gauges on four amount of deflection square columns of force measuring machine
Promote the blade dynamic excitation power of pump, but the flow induced vibrations that this method is acted on whole impeller when measuring impeller without acceptance of persons
Power, can not reflect the size of mixed-flow pump blade rim exciting force under Alford effects.
The content of the invention
For Shortcomings in the prior art, the invention provides mixed-flow pump blade wheel under a kind of measurable Alford effects
The blade wheel structure of edge exciting force.
The present invention is to realize above-mentioned technical purpose by following technological means.
The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects, it is characterised in that including
Impeller, blade wheel chamber, stator, stator room, pump shaft, foil gauge and Alford force measuring systems；
The impeller is in blade wheel chamber, and impeller includes wheel hub, water guide cone and multiple blades, and the blade is arranged on wheel hub
Outer surface, and be uniformly distributed circumferentially, the water guide cone is fixedly connected with the front end of wheel hub, the inside of the blade is from blade
Wheel rim offers the first manhole to root of blade, and the aperture of the first manhole is less than the minimum of blade at its Working position
Thickness, the junction of the wheel hub and blade is provided with the second manhole, the second manhole edge circle from external-to-internal
Circumferential direction is uniformly distributed, and is communicated with corresponding first manhole, the aperture of first manhole and the second manhole
It is identical；
The foil gauge is close at the wheel rim of blade, the section at the wheel rim of the cross sectional shape of foil gauge and the blade
Shape is identical, and the connecting line of the foil gauge connects through the first manhole and the second manhole with Alford force measuring systems
Connect；
The Alford force measuring systems include dc source, single-chip microcomputer and wireless signal transmitting device, and Alford power is surveyed
System sealing is measured in wheel hub；
The central axis of the water guide cone is provided with two-stage ladder round tube hole, and the second closure is logical installed in two-stage ladder circle
In hole, the top of the second closure is provided with an arc-shaped convex, makes itself and water guide cone even transition；
The impeller outdoor cabinets are provided with a round boss, and the round boss center is provided with the 3rd manhole, institute
State the 3rd manhole to be sealed by the 3rd closure, the top of the 3rd closure is provided with wireless signal receiver,
For receiving the wireless signal that Alford force measuring systems are sent, the wireless signal receiver and calculating mechatronics；
The end of the blade wheel chamber is connected with the end of stator room, and stator is located in stator room, and is supported on pump shaft, institute
The end for stating pump shaft is inserted in wheel hub.
Preferably, the central interior of the wheel hub is machined with two-stage ladder circular hole, and Alford force measuring systems are fixed on wheel
The first closure is provided with the bottom of hub two-stage ladder circular hole, two-stage ladder circular hole, the first closure, which measures Alford power, is
System is sealed in two-stage ladder circular hole；
Preferably, first closure, the second closure, the material of the 3rd closure are not shield wireless signal
Material.
Preferably, first closure, the second closure, the material of the 3rd closure are lucite.
Preferably, first closure, the second closure, that the corner on the outside of the 3rd closure is equipped with annular is recessed
Groove, and respectively in the first closure, the second closure, the annular groove of the 3rd closure provided with the first O shapes rubber seal,
The 3rd O shapes rubber seal, the 4th O shape rubber seal.
Preferably, the quantity of the blade is 3~5.
Preferably, annular groove is offered on the end face of water guide cone and the wheel hub laminating, and it is close provided with the 2nd O shape rubber
Seal.
Beneficial effects of the present invention：
The present invention at blade rim by setting foil gauge, while manhole is processed in blade and hub interior,
In the case where not changing mixed-flow pump flow passage structure and not influenceing Real Flow Field state status, mixed flow pump blade under Alford effects is realized
Wheel rim measurement of exciting force, more accurate, more can comprehensively grasp the fluid flow state at impeller blade wheel rim.
Brief description of the drawings
Fig. 1 is the blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects of the present invention
Structural representation.
Fig. 2 is the relative position schematic diagram before foil gauge is not fitted on blade of the present invention and the blade rim.
Fig. 3 is the structural representation of wheel hub of the present invention.
Fig. 4 is enlarged diagram at Fig. 1 A.
Fig. 5 is blade wheel chamber's structural representation of the present invention.
Wherein：
1. stator；2. stator room；3. the first bolt；4. blade wheel chamber；5. the 3rd closure；6. foil gauge；7. blade；8. wheel
Hub；9. water guide cone；10. the first closure；11.Alford force measuring systems；12. pump shaft；13. the 2nd O shape rubber seal；
14. the second closure；15. the 3rd O shape rubber seal；16. the 3rd bolt；17. the second bolt；18. the first O shape rubber seals
Circle；19. the 4th bolt；20. the 4th O shape rubber seal；21. wireless signal receiver；22. computer；23. first is circular logical
Hole；24. round boss；25. third through-hole；26. ring flange；27. the second manhole.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As shown in figure 1, under a kind of measurable Alford effects mixed-flow pump blade rim exciting force blade wheel structure, including leaf
Wheel, blade wheel chamber 4, stator 1, stator room 2, pump shaft 12, foil gauge 6 and Alford force measuring systems 11.
As shown in figure 3, the impeller is in blade wheel chamber 4, and it is connected through a screw thread on pump shaft 12, impeller includes
Wheel hub 8, water guide cone 9 and 3~5 blades 7, the blade 7 is arranged on the outer surface of wheel hub 8, and is uniformly distributed circumferentially, described
The inside of blade 7 offers the first manhole 23 from blade rim to root of blade, and the aperture of the first manhole 23 is less than
The minimum thickness of blade 7 at its Working position, the junction of the wheel hub 8 and blade 7 is circular provided with second from external-to-internal
Through hole 27, second manhole 27 is distributed uniformly and circumferentially, and is communicated with corresponding first manhole 23, and described
One manhole 23 is identical with the aperture of the second manhole 27.
As depicted in figs. 1 and 2, the foil gauge 6 is close at the wheel rim of blade 7, the cross sectional shape of foil gauge 6 and described
Cross sectional shape at the wheel rim of blade 7 is identical, and the connecting line of the foil gauge 6 is circular logical through the first manhole 23 and second
Hole 27 is connected with Alford force measuring systems 11.
The Alford force measuring systems 11 include dc source, single-chip microcomputer and wireless signal transmitting device.Such as Fig. 3 institutes
Show, the central interior of the wheel hub 8 is machined with two-stage ladder circular hole, and Alford force measuring systems 11 are fixed on the two-stage rank of wheel hub 8
The first closure 10 is provided with the bottom of terraced circular hole, two-stage ladder circular hole, first closure 10 passes through the spiral shell of at least four second
Bolt 17 is fixed in the two-stage ladder circular hole, and Alford force measuring systems 11 are sealed in two-stage ladder circle by the first closure 10
In hole, first closure 10 and the two-stage ladder circular hole joint place are provided with the first O shapes rubber seal 18.
The front end of the water guide cone 9 and wheel hub 8 is connected through a screw thread, and the central axis of the water guide cone 9 is provided with two-stage
Ladder round tube hole, the second closure 14 is arranged in two-stage ladder round tube hole by the bolt 16 of at least four the 3rd, the second closure
14 and the two-stage ladder round tube hole joint place at the middle part of water guide cone 9 the 3rd O shapes rubber seal 15 is installed, the second closure 14
Top is provided with an arc-shaped convex, makes itself and the even transition of water guide cone 9.
As shown in Figure 4 and Figure 5, the shell body of blade wheel chamber 4 is provided with a round boss 24, the center of round boss 24
Provided with the 3rd manhole 25, the 3rd manhole 25 is sealed by the 3rd closure 5, and the 3rd closure 5 passes through
The bolt 19 of at least four the 4th is fixed on blade wheel chamber's round boss 24, the institute of the 3rd closure 5 and the round boss 24
State the joint place of through hole 25 and the 4th O shapes rubber seal 20 is installed.The top of 3rd closure 5 is provided with reception of wireless signals
Device 21, for receiving the wireless signal that Alford force measuring systems 11 are sent, the wireless signal receiver 21 and computer 22
Electrical connection.
The lid of first closure 10, second sealing 14, the material of the 3rd closure 5 are lucite, for by described in
The signal that Alford force measuring systems 11 are obtained is transmitted to signal receiving device.
One end that the blade wheel chamber 4 is connected with stator room 2 is provided with ring flange 26, and two ring flanges 26 pass through first
Bolt 3 is connected, and stator 1 is located in stator room 2, and is supported on pump shaft 12.
For the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment to the embodiment, not
In the case of the substantive content of the present invention, any conspicuously improved, replacement that those skilled in the art can make
Or modification belongs to protection scope of the present invention.
Claims (7)
1. the blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects, it is characterised in that including leaf
Wheel, blade wheel chamber (4), stator (1), stator room (2), pump shaft (12), foil gauge (6) and Alford force measuring systems (11)；
The impeller is in blade wheel chamber (4), and impeller includes wheel hub (8), water guide cone (9) and multiple blades (7), the blade
(7) outer surface of wheel hub (8) is arranged on, and is uniformly distributed circumferentially, the front end of the water guide cone (9) and wheel hub (8), which is fixed, to be connected
Connect, the inside of the blade (7) offers the first manhole (23), the first manhole from blade rim to root of blade
(23) aperture is less than the minimum thickness of blade (7) at its Working position, and the junction of the wheel hub (8) and blade (7) is from outer
Portion is provided with the second manhole (27) to inside, and second manhole (27) is distributed uniformly and circumferentially, and with it is corresponding
First manhole (23) is communicated, and first manhole (23) is identical with the aperture of the second manhole (27)；
The foil gauge (6) is close at the wheel rim of blade (7), the cross sectional shape of foil gauge (6) and the wheel rim of the blade (7)
The cross sectional shape at place is identical, and the connecting line of the foil gauge (6) passes through the first manhole (23) and the second manhole (27)
It is connected with Alford force measuring systems (11)；
The Alford force measuring systems (11) include dc source, single-chip microcomputer and wireless signal transmitting device, and Alford power is surveyed
Amount system (11) sealing is in wheel hub (8)；
The central axis of the water guide cone (9) is provided with two-stage ladder round tube hole, and the second closure (14) is arranged on two-stage ladder
In round tube hole, the top of the second closure (14) is provided with an arc-shaped convex, makes itself and water guide cone (9) even transition；
Blade wheel chamber (4) shell body is provided with a round boss (24), and round boss (24) center is circular provided with the 3rd
Through hole (25), the 3rd manhole (25) is sealed by the 3rd closure (5), the 3rd closure (5) it is upper
Side is provided with wireless signal receiver (21), described wireless for receiving the wireless signal that Alford force measuring systems (11) are sent
Signal receiver (21) and computer (22) electrical connection；
The end of the blade wheel chamber (4) is connected with the end of stator room (2), and stator (1) is located in stator room (2), and is supported on
On pump shaft (12), the end of the pump shaft (12) is inserted in wheel hub (8).
2. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 1, its
It is characterised by, the central interior of the wheel hub (8) is machined with two-stage ladder circular hole, and Alford force measuring systems (11) are fixed on wheel
The first closure (10) is provided with the bottom of hub (8) two-stage ladder circular hole, two-stage ladder circular hole, the first closure (11) will
Alford force measuring systems (11) are sealed in two-stage ladder circular hole.
3. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 1, its
It is characterised by, first closure (10), the second closure (14), the material of the 3rd closure (5) are not shield wirelessly
The material of signal.
4. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 3, its
It is characterised by, first closure (10), the second closure (14), the material of the 3rd closure (5) are lucite.
5. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 2, its
It is characterised by, first closure (10), the second closure (14), the corner on the outside of the 3rd closure (5) are equipped with ring
Connected in star, and respectively in the first closure (10), the second closure (14), the annular groove of the 3rd closure (5) provided with the
One O shapes rubber seal (18), the 3rd O shapes rubber seal (15), the 4th O shapes rubber seal (20).
6. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 1, its
It is characterised by, the quantity of the blade (7) is 3~5.
7. the blade wheel structure of mixed-flow pump blade rim exciting force under measurable Alford effects according to claim 1, its
It is characterised by, annular groove is offered on the end face of the water guide cone (9) and wheel hub (8) laminating, and it is close provided with the 2nd O shape rubber
Seal (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710182613.5A CN107100886B (en) | 2017-03-24 | 2017-03-24 | The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710182613.5A CN107100886B (en) | 2017-03-24 | 2017-03-24 | The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects |
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| Publication Number | Publication Date |
|---|---|
| CN107100886A true CN107100886A (en) | 2017-08-29 |
| CN107100886B CN107100886B (en) | 2018-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710182613.5A Active CN107100886B (en) | 2017-03-24 | 2017-03-24 | The blade wheel structure of mixed-flow pump blade rim exciting force under a kind of measurable Alford effects |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590918A (en) * | 2018-04-26 | 2018-09-28 | 中国水利水电科学研究院 | A kind of airborne device and method for surveying dynamic stress |
| CN109580071A (en) * | 2018-11-29 | 2019-04-05 | 浙江大学 | A kind of rotation drive shaft exciting force and impeller measurement of exciting force method |
| CN109882448A (en) * | 2019-02-25 | 2019-06-14 | 江苏大学 | A kind of mixed-flow pump runner envelope with arc-shaped pumping groove |
| CN110173460A (en) * | 2019-04-11 | 2019-08-27 | 江苏大学 | A kind of mixed-flow pump for the laying angle self-regulation that becomes a mandarin |
| CN114370407A (en) * | 2021-12-29 | 2022-04-19 | 江苏大学 | Mixed-flow pump single-flow-channel flow measuring device with built-in pitot tube and measuring method |
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| US5649449A (en) * | 1995-04-25 | 1997-07-22 | Abs Pump Production Ab | Method and apparatus for determining the instantaneous operation conditions of a centrifugal pump |
| CN101846086A (en) * | 2010-06-03 | 2010-09-29 | 浙江大学 | Fluid test experimental device for centrifugal pump |
| CN104655336A (en) * | 2015-01-19 | 2015-05-27 | 江苏大学 | Water spraying propulsion pump structure capable of measuring dynamic exciting force of blade |
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2017
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| US4786238A (en) * | 1984-12-20 | 1988-11-22 | Allied-Signal Inc. | Thermal isolation system for turbochargers and like machines |
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| CN104655336A (en) * | 2015-01-19 | 2015-05-27 | 江苏大学 | Water spraying propulsion pump structure capable of measuring dynamic exciting force of blade |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590918A (en) * | 2018-04-26 | 2018-09-28 | 中国水利水电科学研究院 | A kind of airborne device and method for surveying dynamic stress |
| CN109580071A (en) * | 2018-11-29 | 2019-04-05 | 浙江大学 | A kind of rotation drive shaft exciting force and impeller measurement of exciting force method |
| CN109580071B (en) * | 2018-11-29 | 2020-01-21 | 浙江大学 | Method for measuring excitation force of rotary driving shaft and excitation force of impeller |
| CN109882448A (en) * | 2019-02-25 | 2019-06-14 | 江苏大学 | A kind of mixed-flow pump runner envelope with arc-shaped pumping groove |
| CN110173460A (en) * | 2019-04-11 | 2019-08-27 | 江苏大学 | A kind of mixed-flow pump for the laying angle self-regulation that becomes a mandarin |
| CN110173460B (en) * | 2019-04-11 | 2020-11-03 | 江苏大学 | Mixed flow pump with self-adjusting inflow placement angle |
| CN114370407A (en) * | 2021-12-29 | 2022-04-19 | 江苏大学 | Mixed-flow pump single-flow-channel flow measuring device with built-in pitot tube and measuring method |
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