CN102735422B - 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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- CN102735422B CN102735422B CN201210209616.0A CN201210209616A CN102735422B CN 102735422 B CN102735422 B CN 102735422B CN 201210209616 A CN201210209616 A CN 201210209616A CN 102735422 B CN102735422 B CN 102735422B
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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 studying shield electric machine bell housing gap flow field, this experimental provision is that the different mutual nested cylindrical structural of a kind of research two diameters is under the condition of inner cylinder High Rotation Speed, the Flow Field Distribution of two cylindrical gap, particularly a kind of gap flow field research device of shield electric machine bell housing.
Background technology
In the shield electric machine of industrial application, be full of liquid between rotor and stator, rotor and stator are all the coils wrapped by bell housing, and bell housing can prevent liquid from entering shield electric machine.Liquid between rotor and stator has the function of lubrication and cooling motor.When shield electric machine runs well, rotor high-speed rotates, and stator maintains static.Under such conditions, the liquid between rotor and stator also along with rotor rotates, forms the flow field between rotor and stator under the effect of rotor outer wall viscous force.This flow field inevitably will with the interaction of rotor forces occurring.This interaction can impact the stability of rotor, can cause the unstability of rotor time serious.Therefore be necessary to launch relevant research to this flow field.General Computer Simulation have employed a lot of hypothesis, and may obtain the solution that some are approximate, this theoretical analysis also needs to be verified.
Through finding existing experimental provision retrieval, general experimental provision is all the cylinder of use two different-diameters, little cylinder is placed on the inside of large cylinder, gap in the middle of two cylinders fills water, at one end use the cylinder that driven by motor is little, form similar flow field in centre, study the regularity of distribution in flow field afterwards.This experimental provision can reflect the rule of this kind of flowing to a certain extent, but, there is following defect:
1, the slewing range of existing experimental provision is narrower, and flexible very poor, amendment is got up very inconvenient;
2, the excentricity of existing experimental provision is fixing, and variable parameter is little;
3, existing experimental provision itself can not simulate the axia flow in bell housing gap, therefore can not study the impact of axia flow on rotor;
4, the flow field flow form that can simulate of existing experimental provision is single, can not Flow Field Distribution under the various operating mode of full-scope simulation.
Summary of the invention
The object of the invention is the gap flow field research device providing a kind of shield electric machine bell housing, narrower with the slewing range of the experimental provision solving research shield electric machine bell housing gap flow field of the prior art, flexible very poor, revise very inconvenient technical matters.
The object of the invention is achieved through the following technical solutions:
A gap flow field research device for shield electric machine bell housing, comprises rotor, electric machine main shaft and housing, and described rotor is connected with described electric machine main shaft, and described rotor is arranged in described housing, and described electric machine main shaft is provided with dynamometer.
Preferably, described electric machine main shaft comprises the electric machine main shaft of five-axle linkage.
Preferably, described housing comprises the end cap, enclosure body and the bottom that connect successively, and described rotor is arranged in described enclosure body.
Preferably, described enclosure body and described bottom have through hole, described through hole is connected can be formed loop by pipeline.
Preferably, described research device also comprises some sensors, and described enclosure body is provided with connecting hole, and described sensor is connected with described housing by described connecting hole.
Preferably, described sensor comprises displacement transducer.
Preferably, described sensor also comprises pressure transducer and/or acceleration transducer.
Preferably, the lower end side of described rotor can be provided with radial hole, and the bottom surface of described rotor can be provided with axial hole, and described radial hole communicates with described axial hole.
Preferably, described dynamometer comprises three-dimensional force torsional forces dynamometer, and described three-dimensional force torsional forces dynamometer is connected on described electric machine main shaft.
Preferably, described enclosure body is organic glass housing.
Compared with prior art, the present invention has following advantage:
1, research device of the present invention electric machine main shaft can within the scope of 0-8000rpm continuous speed adjustment, this rotating speed can meet the rotation speed requirements of experiment completely, and provide very large flexibility for experiment medium speed changes, can test at various speeds very easily;
2, the electric machine main shaft of research device of the present invention can realize the motion of high-precision continuous dislocation, and can realize testing under various bias by regulating rotor-position, the impact of research offset stream field, variable parameter is more;
3, the electric machine main shaft of research device of the present invention can realize rotor forward and reverse whirling motion, with the actual motion of model rotor, so that research device can simulate the motion conditions of real electrical machinery inner rotator, make test findings more reliable, contribute to reducing actual flow state;
The electric machine main shaft of 4, research device of the present invention there is three-dimensional force torsional forces dynamometer, the three-dimensional force suffered by rotor and moment of torsion can be measured, the acting force in flow field can be subject to by detection rotor in operation process more accurately and efficiently;
5, blade wheel structure can be arranged 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 contribute to making flow state in research device further close to actual flow state;
6, the layout density ratio of the sensor of research device of the present invention is larger, along axis and the radial direction evenly densely covered sensor of enclosure body, the real-time monitoring of whole flow field change state can be realized, the data of these sensors contribute to reducing the pressure distribution in whole flow field and the vibrational state of whole rotor, and mutually confirm with the data of the dynamometer on electric machine main shaft, make test findings more reliable and credible;
7, the employing organic glass shell of research device of the present invention, the visual of flow field can be realized, in flow field, add trace particle, adopt high-speed camera can extract the picture of fluid flow inside state simultaneously, contribute to the flowing law being further familiar with interior flow field.
Accompanying drawing explanation
Fig. 1 is the structural representation of research device of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the present invention in detail.
Refer to Fig. 1, the gap flow field research device of shield electric machine bell housing of the present invention, comprise rotor 2, sensor 4, electric machine main shaft 1 and housing, rotor 2 is connected with electric machine main shaft 1, and rotor 2 is arranged in 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 within the scope of 0-8000rpm continuous speed adjustment, this rotating speed can meet the rotation speed requirements of experiment completely, and provides very large flexibility for experiment medium speed changes, and can test at various speeds very easily.The positioning precision of electric machine main shaft can reach 10 μm, the movement of main shaft can be relied on to realize the random eccentric rate of rotor, the motion of high-precision continuous dislocation can being realized, can realizing testing under various bias by regulating rotor-position, the impact of research offset stream field.Electric machine main shaft can also realize rotor forward and reverse whirling motion, with the actual motion of model rotor.So that test unit can simulate the motion conditions of real electrical machinery inner rotator, make test findings more reliable, contribute to reducing actual flow state.
Housing comprises the end cap 31, enclosure body 32 and the bottom 33 that connect successively, and rotor 2 is arranged in enclosure body 32.Enclosure body 32 and bottom 33 have through hole, and through hole is connected can be formed water flow circuits by pipeline 7.When rotor 2 is in enclosure body 32 during high-speed rotation, water flow circuits can make water can not ooze out from housing, can prevent the water in housing to get wet worktable.
Enclosure body 32 is provided with connecting hole, and sensor is connected with enclosure body 32 by connecting hole.In this example, sensor is spirally connected with enclosure body and is connected.Sensor comprises displacement transducer, pressure transducer and acceleration transducer.Displacement transducer, pressure transducer can contact with the water in enclosure body through the connecting hole in enclosure body with acceleration transducer.Displacement transducer, pressure transducer and acceleration transducer can along the radial and axial distributions of enclosure body.The layout density ratio of sensor is comparatively large, can realize the real-time monitoring of whole flow field change state.The data of these sensors contribute to reducing the pressure distribution in whole flow field and the vibrational state of whole rotor, and mutually confirm with the data of the dynamometer on electric machine main shaft, make test findings more reliable and credible.
In order to study the impact of axial flow field on rotor, can arrange radial hole 21 in the lower end side of rotor, arrange axial hole 22 in the bottom surface of rotor, radial hole 21 passes to 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 contributes to making flow state in test unit further close to actual flow state.Simultaneously, research device of the present invention is also furnished with another rotor, in the bottom of this rotor, blade wheel structure is not set, when not needing to study the affecting of axia flow, can take off having the rotor of blade wheel structure, replace with the rotor not having blade wheel structure, eliminate the impact of blade wheel structure, to study the impact that other factor stream fields cause.
Dynamometer comprises three-dimensional force torsional forces dynamometer, and three-dimensional force torsional forces dynamometer is connected on electric machine main shaft.Three-dimensional force torsional forces dynamometer can measure three-dimensional force suffered by rotor and torsional forces, can directly effectively detection rotor in operation process, be subject to the acting force in flow field.
Enclosure body 32 of the present invention is organic glass housing, the visual of flow field can be realized, in flow field, add trace particle, adopt high-speed camera can extract the picture of fluid flow inside state simultaneously, contribute to the flowing law being further familiar with interior flow field.
When testing, electric machine main shaft rotates, thus rotor driven rotates, and can simulate the motion of shielding motor rotor, the simulation of the organic glass housing of rotor exterior be shield electric machine stationary part.The runner that formation one is annular between rotor and housing, there is liquid flow the runner inside of this annular, and along with the running of rotor, the liquid of this inner space has corresponding flowing, forms the flow field in bell housing gap.Organic glass housing upper end is provided with an end cap 31, and lower end is provided with a bottom 33, bottom and enclosure body respectively has a hole, is connected by pipeline 7, forms water flow circuits, current can be prevented excessive.After blade wheel structure pumps head, reflux under preventing current direction, by the Distance Shortened of rotor and bottom, form motive seal.
Organic glass housing arranges multiple displacement transducer and pressure transducer, intactly can monitor the distribution in whole flow field and the vibration of rotor.Arrange blade wheel structure in the lower end of rotor, this blade wheel structure comprises radial hole and axial hole, and radial hole and axial hole communicate.This structure is after rotor high-speed rotates, and the outside pump water of meeting, forms water circulation upwards, is also axia flow, can studies the acting force of axia flow to rotor by this.Whole research device is placed on platen 6, and uses fixture 6 to position clamping.
The proposition design of research device of the present invention is the action rule in order to study Flow Field Distribution situation between shield electric machine bell housing and flow field and rotor.The distinguishing feature of research device of the present invention is that experimental system flexibility is larger, and testing scheme is perfect, and has the ability of adding axia flow, under multiple excentricity and rotating speed, can realize the simulation of various flow state.Research device of the present invention can be thorough the regularity of distribution of this flowing of research and the action rule of this kind of flowing to rotor, be the fixed basis of stability study pad of rotor.
Be only several specific embodiments of the application above, but the application is not limited thereto, the changes that any person skilled in the art can think of, all should drops in the protection domain of the application.
Claims (9)
1. a gap flow field research device for shield electric machine bell housing, is characterized in that, comprises rotor, electric machine main shaft and housing, and described rotor is connected with described electric machine main shaft, and described rotor is arranged in described housing, and described electric machine main shaft is provided with dynamometer; The lower end side of described rotor is provided with radial hole, and the bottom surface of described rotor is provided with axial hole, and described radial hole communicates with described axial hole.
2. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 1, it is characterized in that, described electric machine main shaft comprises the electric machine main shaft of five-axle linkage.
3. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 1, is characterized in that, described housing comprises the end cap, enclosure body and the bottom that connect successively, and described rotor is arranged in described enclosure body.
4. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 3, is characterized in that, described enclosure body and described bottom have through hole, and described through hole is connected can be formed loop by pipeline.
5. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 3, it is characterized in that, described research device also comprises some sensors, and described enclosure body is provided with connecting hole, and described sensor is connected with described housing by described connecting hole.
6. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 5, it is characterized in that, described sensor comprises displacement transducer.
7. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 6, it is characterized in that, described sensor also comprises pressure transducer and/or acceleration transducer.
8. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 1, is characterized in that, described dynamometer comprises three-dimensional force torsional forces dynamometer, and described three-dimensional force torsional forces dynamometer is connected on described electric machine main shaft.
9. the gap flow field research device of a kind of shield electric machine bell housing as claimed in claim 3, is characterized in that, described enclosure body is organic glass housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN102735422A CN102735422A (en) | 2012-10-17 |
| CN102735422B true CN102735422B (en) | 2015-07-01 |
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| CN103452868B (en) * | 2013-08-02 | 2016-08-10 | 上海交通大学 | Vertical canned motor pump gap flowing test laboratory table |
| CN105784231B (en) * | 2016-03-11 | 2019-01-25 | 上海交通大学 | Band return port disk Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device and method |
| CN105784233B (en) * | 2016-03-31 | 2019-06-21 | 上海交通大学 | The test device and method of axial compressive force stream and circumferential shear flow reciprocal effect clearance flow dynamic resistance to each other |
| CN106814101B (en) * | 2016-12-30 | 2020-07-14 | 上海交通大学 | Vertical turbulent Taylor-Couette flow heat transfer experiment table |
| CN107489609B (en) * | 2017-07-06 | 2020-01-07 | 上海交通大学 | Vertical gap flow dynamic characteristic coefficient testing device |
| 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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