CN102735422A - Device for studying gap flow field of shielding sleeve of shielding motor - Google Patents
Device for studying gap flow field of shielding sleeve of shielding motor Download PDFInfo
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- CN102735422A CN102735422A CN2012102096160A CN201210209616A CN102735422A CN 102735422 A CN102735422 A CN 102735422A CN 2012102096160 A CN2012102096160 A CN 2012102096160A CN 201210209616 A CN201210209616 A CN 201210209616A CN 102735422 A CN102735422 A CN 102735422A
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Abstract
The invention relates to an experimental device for studying a gap flow field of a shielding sleeve of a shielding motor, in particular to a device for studying the gap flow field of the shielding sleeve of the shielding motor. The device for studying the gap flow field of the shielding sleeve of the shielding motor comprises a rotor, a motor spindle and a shell, wherein the rotor is connected with the motor spindle and arranged in the shell; and a dynamometer is arranged on the motor spindle. Compared with the prior art, the device has the advantages that the speed of the motor spindle can be continuously adjusted in the range of 0 to 8,000rpm, the rotating speed can completely meet the requirement of an experiment, high flexibility is provided for changing the rotating speed in the experiment, and the experiment can be conveniently performed at various rotating speeds.
Description
Technical field
The present invention relates to a kind of experimental provision of studying flow field, shield electric machine bell housing gap; This experimental provision is that the different mutual nested cylindrical structural of two diameters of a kind of research is under the inner cylinder high-speed rotating conditions; The Flow Field Distribution of two cylindrical gap, particularly a kind of gap Study on Flow Field device of shield electric machine bell housing.
Background technology
In the shield electric machine that industry is used, be full of liquid between rotor and the stator, rotor and stator all are the coils of being wrapped by bell housing, bell housing can prevent that liquid from getting into shield electric machine.Liquid between rotor and the stator has function lubricated and cooling motor.When shield electric machine runs well, the rotor high-speed rotation, stator is fixed.Under this operating mode, the liquid between rotor and the stator also along with the rotor rotation, forms the flow field between rotor and the stator under the effect of rotor outer wall viscous force.This flow field inevitably will with the interaction of rotor generation power.This interaction meeting impacts the stability of rotor, can cause the unstability of rotor in the time of serious.Therefore be necessary relevant research is launched in this flow field.A lot of hypothesis has been adopted in general Computer Simulation, may obtain some approximate separating, and this theoretical analysis also need be tested and verify.
Through being retrieved, the current experiments device finds; General experimental provision all is to use the cylinder of two different-diameters; Little cylinder is placed on the inside of big cylinder, and the gap fills with water in the middle of two cylinders is at one end used the little cylinder of driven by motor; Form similar flow field in the centre, study flow field distribution afterwards.This experimental provision can reflect the rule that this kind is mobile to a certain extent, still, has following defective:
1, the slewing range of current experiments device is narrower, and is flexible very poor, revises very inconvenient;
2, the excentricity of current experiments device is fixed, and variable parameter seldom;
3, current experiments device itself can not be simulated the axia flow in the bell housing gap, therefore can not study the influence of axia flow to rotor;
4, the flow field liquid form that can simulate of current experiments device is single, the Flow Field Distribution under can not the various operating modes of full-scope simulation.
Summary of the invention
The object of the invention is to provide a kind of gap Study on Flow Field device of shield electric machine bell housing; Slewing range with the experimental provision that solves flow field, research shield electric machine of the prior art bell housing gap is narrower; Flexible very poor, revise very inconvenient technical matters.
The object of the invention realizes through following technical scheme:
A kind of gap Study on Flow Field device of shield electric machine bell housing comprises rotor, electric machine main shaft and housing, and said rotor is connected with said electric machine main shaft, and said rotor is arranged in the said housing, and said electric machine main shaft is provided with dynamometer.
Preferably, said electric machine main shaft comprises the electric machine main shaft of five-axle linkage.
Preferably, said housing comprises end cap, enclosure body and the bottom that connects successively, and said rotor is arranged in the said enclosure body.
Preferably, have through hole on said enclosure body and the said bottom, said through hole connects through pipeline can form the loop.
Preferably, said research device also comprises some sensors, and said enclosure body is provided with connecting hole, and said sensor can be connected with said housing through said connecting hole.
Preferably, said sensor comprises displacement transducer.
Preferably, said sensor also comprises pressure transducer and/or acceleration transducer.
Preferably, the lower end side of said rotor can be provided with radial hole, and the bottom surface of said rotor can be provided with axial hole, and said radial hole communicates with said axial hole.
Preferably, said dynamometer comprises three-dimensional force torsional forces dynamometer, and said three-dimensional force torsional forces dynamometer is connected on the said electric machine main shaft.
Preferably, said enclosure body is the organic glass housing.
Compared with prior art, the present invention has following advantage:
1, the electric machine main shaft of research device of the present invention can be in the 0-8000rpm scope continuous speed adjustment; This rotating speed can satisfy the rotating speed requirement of experiment fully; And, can under various rotating speeds, test very easily for the change of experiment medium speed provides very big flexibility;
2, the electric machine main shaft of research device of the present invention can be realized high-precision continuous dislocation motion, can be implemented under the various off-centre through the adjusting rotor-position to make an experiment, and the influence of research offset stream field, variable parameter is more;
3, the electric machine main shaft of research device of the present invention can be realized rotor forward and reverse whirling motion; Actual motion with model rotor; So that research device can be simulated the motion conditions of real electrical machinery inner rotator, make test findings more reliable, help to reduce actual flow state;
4, three-dimensional force torsional forces dynamometer is arranged on the electric machine main shaft of research device of the present invention, can measure suffered three-dimensional force of rotor and moment of torsion, detection rotor receives the acting force in flow field in operation process more accurately and efficiently;
5, can be arranged to blade wheel structure in the rotor bottom of research device of the present invention; This blade wheel structure can provide the head of axia flow; Form complete axial circulation, add this structure and help to make the interior flow state of research device further near the actual flow state;
6, the layout density of the sensor of research device of the present invention is bigger; The sensor that axially and radially evenly gathers along enclosure body; Can realize the real-time monitoring of whole flow field variable condition; The data of these sensors help to reduce the pressure distribution in whole flow field and the vibrational state of whole rotor, and confirm each other with the data of dynamometer on the electric machine main shaft, make test findings more reliable and credible;
7, the employing organic glass shell of research device of the present invention; Can realize flow field visualization; In the flow field, add trace particle, adopt high-speed camera can extract the picture of fluid flow inside state simultaneously, help the flowing law of being familiar with interior flow field further.
Description of drawings
Fig. 1 is the structural representation of research device of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
See also Fig. 1, the gap Study on Flow Field device of shield electric machine bell housing of the present invention comprises rotor 2, sensor 4, electric machine main shaft 1 and housing, and rotor 2 is connected with electric machine main shaft 1, and rotor 2 is arranged in the housing, and electric machine main shaft 1 is provided with dynamometer.In this example, electric machine main shaft 1 is the electric machine main shaft of five-axle linkage.
The electric machine main shaft of five-axle linkage of the present invention can be in the 0-8000rpm scope continuous speed adjustment, this rotating speed can satisfy the rotating speed requirement of experiment fully, and for the experiment medium speed changes very big flexibility is provided, and can under various rotating speeds, test very easily.The bearing accuracy of electric machine main shaft can reach 10 μ m; Can rely on any excentricity of the mobile realization rotor of main shaft; Can realize high-precision continuous dislocation motion, can be implemented under the various off-centre through the adjusting rotor-position and make an experiment the influence of research offset stream field.Electric machine main shaft can also be realized rotor forward and reverse whirling motion, with the actual motion of model rotor.So that test unit can be simulated the motion conditions of real electrical machinery inner rotator, make test findings more reliable, help to reduce actual flow state.
Housing comprises end cap 31, enclosure body 32 and the bottom 33 that connects successively, and rotor 2 is arranged in the enclosure body 32.Have through hole on enclosure body 32 and the bottom 33, through hole connects through pipeline 7 can form the current loop.When rotor 2 in enclosure body 32 during high speed rotating, the current loop can make water can not ooze out from housing, can prevent water in the housing worktable of getting wet.
In order to study of the influence of axial flow field to rotor, can radial hole 21 be set in the lower end side of rotor, in the bottom surface of rotor axial hole 22 is set, radial hole 21 passes to the formation blade wheel structure mutually with axial hole 22.This blade wheel structure can provide the head of axia flow, forms complete axial circulation, adds this structure and helps to make the interior flow state of test unit further near the actual flow state.Simultaneously; Research device of the present invention also is furnished with another rotor, in the bottom of this rotor blade wheel structure is not set, in the time need not studying the influencing of axia flow; Can the rotor that blade wheel structure is arranged be taken off; The rotor that does not have blade wheel structure in the replacing is eliminated the influence of blade wheel structure, to study the influence that other factor stream fields cause.
Dynamometer comprises three-dimensional force torsional forces dynamometer, and three-dimensional force torsional forces dynamometer is connected on the electric machine main shaft.Three-dimensional force torsional forces dynamometer can be measured suffered three-dimensional force of rotor and torsional forces, can be directly effectively detection rotor in operation process, receive the acting force in flow field.
When experimentizing, electric machine main shaft rotates, thereby drives the rotor rotation, can simulate the motion of shielding motor rotor, and what the organic glass housing of rotor exterior was simulated is the shield electric machine stationary part.Between rotor and housing, form the runner of an annular, there is liquid flow this annular runner inside, and along with the running of rotor, the liquid of this gap has corresponding flowing, and forms the flow field in bell housing gap.Organic glass housing upper end is provided with an end cap 31, and the lower end is provided with a bottom 33, respectively has a hole on bottom and the enclosure body, connects through pipeline 7, forms the current loop, can prevent that current are excessive.After blade wheel structure pumps head,,, form motive seal with the reduced distances of rotor and bottom in order to prevent the current direction refluxed.
On the organic glass housing, arrange a plurality of displacement transducers and pressure transducer, can intactly monitor the distribution in whole flow field and the vibration of rotor.Lower end at rotor is provided with blade wheel structure, and this blade wheel structure comprises radial hole and axial hole, and radial hole and axial hole communicate.This structure is after the rotor high-speed rotation, and the outside pump water of meeting forms water circulation upwards, also is axia flow, can study the acting force of axia flow to rotor by this.Whole research device is placed on the platen 6, and uses anchor clamps 6 to position clamping.
The proposition of research device of the present invention design is in order to study Flow Field Distribution situation and the action rule of flow field and rotor between the shield electric machine bell housing.The distinguishing feature of research device of the present invention is that the experimental system flexibility is bigger, and testing scheme is perfect, and has the ability of adding axia flow, can under a plurality of excentricities and rotating speed, realize the simulation of various flow states.Research device of the present invention can be thorough this mobile regularity of distribution of research flow to the action rule of rotor with this kind, be the fixed basis of stability study pad of rotor.
More than the disclosed several specific embodiments that are merely the application, but the application is not limited thereto, any those skilled in the art can think variation, all should drop in the application's the protection domain.
Claims (10)
1. the gap Study on Flow Field device of a shield electric machine bell housing is characterized in that, comprises rotor, electric machine main shaft and housing, and said rotor is connected with said electric machine main shaft, and said rotor is arranged in the said housing, and said electric machine main shaft is provided with dynamometer.
2. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 1 is characterized in that said electric machine main shaft comprises the electric machine main shaft of five-axle linkage.
3. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 1 is characterized in that, said housing comprises end cap, enclosure body and the bottom that connects successively, and said rotor is arranged in the said enclosure body.
4. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 3 is characterized in that, has through hole on said enclosure body and the said bottom, and said through hole connects through pipeline can form the loop.
5. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 3; It is characterized in that; Said research device also comprises some sensors, and said enclosure body is provided with connecting hole, and said sensor can be connected with said housing through said connecting hole.
6. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 5 is characterized in that said sensor comprises displacement transducer.
7. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 6 is characterized in that said sensor also comprises pressure transducer and/or acceleration transducer.
8. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 1 is characterized in that the lower end side of said rotor can be provided with radial hole, and the bottom surface of said rotor can be provided with axial hole, and said radial hole communicates with said axial hole.
9. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 1 is characterized in that said dynamometer comprises three-dimensional force torsional forces dynamometer, and said three-dimensional force torsional forces dynamometer is connected on the said electric machine main shaft.
10. the gap Study on Flow Field device of a kind of shield electric machine bell housing as claimed in claim 3 is characterized in that said enclosure body is the organic glass housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210209616.0A CN102735422B (en) | 2012-06-25 | 2012-06-25 | Device for studying gap flow field of shielding sleeve of shielding motor |
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| CN201210209616.0A CN102735422B (en) | 2012-06-25 | 2012-06-25 | Device for studying gap flow field of shielding sleeve of shielding motor |
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| CN102735422A true CN102735422A (en) | 2012-10-17 |
| CN102735422B CN102735422B (en) | 2015-07-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452868A (en) * | 2013-08-02 | 2013-12-18 | 上海交通大学 | Test bench for clearance flow in vertical canned motor pump |
| CN105784231A (en) * | 2016-03-11 | 2016-07-20 | 上海交通大学 | Testing apparatus and method for radial pressure flow resistance and asymmetric axial force of circulation at reflowing-hole-included plate surface gap |
| CN105784233A (en) * | 2016-03-31 | 2016-07-20 | 上海交通大学 | Test device and test method for interactive influence of axial pressure flow and circumferential shear flow on clearance flow resistance of each other |
| CN106814101A (en) * | 2016-12-30 | 2017-06-09 | 上海交通大学 | Vertical turbulent flow Taylor Couette flow flowing heat transfer experimental bench |
| CN107489609A (en) * | 2017-07-06 | 2017-12-19 | 上海交通大学 | Vertical gap mobilization dynamic characteristic coefficient test device |
| CN111397867A (en) * | 2020-02-26 | 2020-07-10 | 上海交通大学 | Test bench suitable for testing fatigue strength of shielding sleeve of shielding motor pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452868A (en) * | 2013-08-02 | 2013-12-18 | 上海交通大学 | Test bench for clearance flow in vertical canned motor pump |
| CN105784231A (en) * | 2016-03-11 | 2016-07-20 | 上海交通大学 | Testing apparatus and method for radial pressure flow resistance and asymmetric axial force of circulation at reflowing-hole-included plate surface gap |
| CN105784233A (en) * | 2016-03-31 | 2016-07-20 | 上海交通大学 | Test device and test method for interactive influence of axial pressure flow and circumferential shear flow on clearance flow resistance of each other |
| CN106814101A (en) * | 2016-12-30 | 2017-06-09 | 上海交通大学 | Vertical turbulent flow Taylor Couette flow flowing heat transfer experimental bench |
| CN106814101B (en) * | 2016-12-30 | 2020-07-14 | 上海交通大学 | Vertical turbulent Taylor-Couette flow heat transfer experiment table |
| CN107489609A (en) * | 2017-07-06 | 2017-12-19 | 上海交通大学 | Vertical gap mobilization dynamic characteristic coefficient test device |
| CN111397867A (en) * | 2020-02-26 | 2020-07-10 | 上海交通大学 | Test bench suitable for testing fatigue strength of shielding sleeve of shielding motor pump |
| CN111397867B (en) * | 2020-02-26 | 2021-08-06 | 上海交通大学 | Test bench suitable for testing fatigue strength of shielding sleeve of shielding motor pump |
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| CN102735422B (en) | 2015-07-01 |
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