CN104215441A - Dynamic radial loading mechanism and stability test scheme for vertical rotor - Google Patents
Dynamic radial loading mechanism and stability test scheme for vertical rotor Download PDFInfo
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- CN104215441A CN104215441A CN201410419446.8A CN201410419446A CN104215441A CN 104215441 A CN104215441 A CN 104215441A CN 201410419446 A CN201410419446 A CN 201410419446A CN 104215441 A CN104215441 A CN 104215441A
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Abstract
The invention provides a dynamic radial loading mechanism and a stability test scheme for a vertical rotor. The dynamic radial loading mechanism and the stability test scheme are designed on the basis of a test stand for the vertical rotor of a certain shield pump. The dynamic radial loading mechanism comprises a shell, a support and a hand wheel. The support is positioned in the shell and can move along the inside of the shell, two turning wheels are arranged at an end of the support, and the end of the support extends out of the shell. The hand wheel at the other end of the shell extends into the shell via a threaded transmission component and a bolt sequentially, is connected with the support and can rotate, so that the support can move towards the outer side of the main shell. The radial loading mechanism is mounted on an outer shell of the test stand, the rotor which is connected with an output shaft of a motor by a coupling is mounted inside the outer shell of the test stand, and the turning wheels cling to the coupling; a test device further comprises a data acquisition recording instrument, a force measuring sensor and a displacement sensor, the force measuring sensor and the displacement sensor are connected with the data acquisition recording instrument, the force measuring sensor is used for measuring data of radial force generated by the threaded transmission component, the displacement sensor is used for measuring displacement of the rotor in two mutually perpendicular radial directions in a certain plane after the rotor is radially loaded in rotation procedures, and the certain plane is perpendicular to the rotation axis of the rotor.
Description
Technical field
The invention belongs to fluid machinery technical field, particularly relate to canned motor pump testing table vertical rotor dynamic radial load maintainer and stability test scheme.
Background technology
Canned motor pump is a kind of unprssurized pump, and impeller and rotor are sealed in stator casing, and what stator casing adopted is static seal, and is provided rotating magnetic field by a winding and driven rotor.The driving of Ordinary Centrifugal Pumps is connected with electric drive axle by the impeller axle of shaft coupling by pump, makes impeller rotate together with motor and work.There is the problem of the leak of liquid that long-term operation seal failure causes in conventional pump, and shield pump structure and eliminate the sealing device for rotary shaft that conventional centrifugal pump has, therefore complete No leakage can be accomplished, thus can be used for carrying and there is corrosive, that be pernicious to people (as severe toxicity, radioactivity), inflammable and explosive and expensive or other special liquid.
The main pump of nuclear power station is positioned at nuclear island cardia, is used for chilled water to pump into evaporator conversion thermal energy, is the key that nuclear power running controls water circulation, belongs to the first device of nuclear power station.Nuclear reactor main pump have shaft seal pump, wet-wound group pump, canned motor pump.At present just in Devoting Major Efforts To Developing and research is the main pump of canned motor pump form, in the course of work of such main pump, due to the asymmetric design of vane pump shell structure, the liquid be transported asymmetry quantum dot in pump, asymmetry quantum dot can apply radial counter-force by impeller to the main shaft of pump, allows vertical rotor have fixing position of rotation, and then improves rotor stability, reduce vibration & noise, but but bring the problems such as bearing wear.In order to the impact that Study of Fluid radial force is brought rotor stability, just need on canned motor pump vertical rotor testing table, to design a kind of mechanism to simulate the radial force of fluid generation.
Summary of the invention
In order to solve the problem, the invention provides a kind of vertical rotor dynamic radial load maintainer, described dynamic radial load maintainer comprises housing, support, screw-driven part and handwheel, wherein,
Described housing is the box like structure of one end open, and described support is positioned at described housing and the opening of described housing is stretched out in one end, the external part of described support is at least provided with a runner;
Described screw-driven part puts in described housing from the other end of described housing, and is threaded with described housing, and one end that described screw-driven part puts in described housing is connected with described support; Described handwheel is arranged on described screw-driven part and is positioned on one end of described hull outside, rotates described handwheel and described screw-driven part is rotated and axially promotes described support moving radially along described main casing.
Preferably, the external part of described support is arc-shaped, and the two ends of described support circular arc are respectively arranged with described runner.
Preferably, described runner comprises rotating shaft, bearing and bearing outside, described rotating shaft arrange on the bracket and its central shaft perpendicular to the moving direction of described support, described bearing outside is located in described rotating shaft by described bearing holder (housing, cover).
Preferably, described rotating shaft is fixing on the bracket by described retainer nut.
Preferably, one end that described screw-driven part is positioned at described hull outside is provided with setscrew nut.
Preferably, described screw-driven part is bolted described support, and described bolt is provided with force cell, and described force cell is also connected with a data acquisition recorder.
Preferably, described data acquisition recorder is also connected with two for measuring rotor at the displacement transducer perpendicular to two orthogonal radial top offsets in the plane of its turning axle.
Preferably, described vertical rotor dynamic radial load maintainer also comprises testing table shell, motor, described motor support base is installed on described testing table shell by motor support base, and a rotor is positioned at testing table shell, and the output shaft of described motor is connected with described rotor by shaft coupling;
Described radial loaded mechanism is arranged on described testing table shell, and rotation that is vertical and described rotor, described runner is close on described shaft coupling.
Present invention also offers a kind of vertical rotor stability test scheme, adopt vertical rotor dynamic radial load maintainer as above, concrete steps are as follows:
Step 1, starts described motor, rotor turns described in described motor drag;
Step 2, rotates described handwheel, and described handwheel drives described screw-driven part and moves axially, and described screw-driven part promotes the radial motion of runner along described rotor of described bracket end, and makes described runner be fitted on the surface of described shaft coupling;
Step 3, vertical rotor test unit also includes force cell, displacement transducer and data acquisition recorder, the axis thrust of described screw-driven part measured by described force cell, rotor described in described displacement sensor is perpendicular to the displacement in two orthogonal radial directions in the plane of its turning axle, and the data of acquisition are transferred to data acquisition recorder by described force cell and institute's displacement sensors;
Step 4, shaft core position when rotating according to the data analysis rotor of institute's displacement sensors transmission and dynamic rule thereof; The data that the data transmit described force cell and institute's displacement sensors transmit carry out coupling analysis, obtain the rotation status characteristic of different radial force state lower rotor part, and find optimum rotor radial power.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
A kind of vertical rotor dynamic radial load maintainer provided by the invention, test unit and stability test scheme, the function of the asymmetric radial force of dynamic load can be realized, combined sensor and data acquisition and analysis system, rotor stability is analyzed in on-line testing, for canned motor pump rotor hydrodynamics design and optimization provides test figure reference, be conducive to promoting that canned motor pump rotor apparatus improves; Structure of the present invention is simple simultaneously, easy to operate.
Accompanying drawing explanation
By reference to the accompanying drawings, by hereafter state detailed description, more clearly can understand above-mentioned and other feature and advantage of the present invention, wherein:
Fig. 1 is the structure of vertical rotor dynamic radial load maintainer is one figure;
Fig. 2 is the connection diagram of vertical rotor dynamic radial load maintainer;
Fig. 3 is the structural representation of rotor dynamic radial load testing machine.
Symbol description:
1-screw-driven part 2-bolt 3-hold-down nut
4-spring shim 5-handwheel 6-setscrew nut
7-force cell 8-end cap 9-support
10-loosen nut 11-bearing outside 12-rotating shaft
13-bearing 14-shaft coupling 15-motor
16-output shaft 17-motor support base 18-rotor
19-data acquisition recorder 20-displacement transducer 21-testing table shell.
Embodiment
See the accompanying drawing that the embodiment of the present invention is shown, hereafter in more detail the present invention will be described.But the present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.On the contrary, it is abundant and complete open in order to reach for proposing these embodiments, and makes those skilled in the art understand scope of the present invention completely.In these accompanying drawings, for clarity sake, may be exaggerated size and the relative size in layer and region.
With reference to figure 1-3, the invention provides a kind of vertical rotor dynamic radial load maintainer, be applicable to the radial loaded test of canned motor pump rotor, certain the present invention uses object and is unlikelyly confined to canned motor pump rotor, by suitable structural adjustment, make it be applicable to the radial loaded of other rotational structure, be not all restricted herein.
Concrete, this vertical rotor radial loaded mechanism comprises housing, support, screw-driven part, handwheel etc.; Wherein, housing forms the box like structure of one end open jointly by main body and end cap 8, and handwheel 5 is fixedly attached on one end of screw-driven part 1 by hold-down nut 3; The other end of screw-driven part 1 is provided with screw thread, and the other end of screw-driven part 1 puts in housing through end cap 8, the other end of screw-driven part 1 is threaded with between end cap 8, and rotation hand wheel 5 drives screw-driven part 1 to rotate and realizes axial displacement simultaneously; In the present embodiment, screw-driven part 1 is also provided with setscrew nut 6, setscrew nut 6 be positioned at housing outside near end cap 8 side, setscrew nut 6 moves axially displacement for what limit screw-driven part 1.Support 9 is positioned at housing, and can move along the inside of housing, and one end of support 9 is stretched out from the opening of housing; One end that screw-driven part 1 puts in housing is also connected with a bolt 2, and one end of bolt 2 is fixedly connected with screw-driven part 1, and the other end of bolt 2 is connected on support 9; Screw-driven part 1 drives bolt 2 to move axially, and bolt 2 drives again support 9 to move axially.
In the present embodiment, the other end of support 9 is provided with two runners.Concrete, the external part of support 9 be arc-shaped, and two runners are arranged on the two ends of support circular arc respectively, and runner is symmetrical arranged about the center line of support 9, raising contact stabilization; Runner includes rotating shaft 12, bearing 13, bearing outside 11, and rotating shaft 12 is arranged perpendicular to the upper and lower end face of support 9, and rotating shaft 12 is connected with support 9 by retainer nut 10; Bearing outside 11 is set on the lateral wall of rotating shaft 12 by bearing 13, and bearing outside 11 can be rotated axis around the shaft; The exterior sidewall portions of bearing outside 11 stretches out support 9, and jointly forms whole arc structure with the circular arc portion of support 9; The number that is provided with of certain runner is not limited in this, can select as the case may be, not be restricted herein.
In the present embodiment, this vertical rotor dynamic radial load maintainer also comprises data acquisition recorder 19, force cell 7 and displacement transducer 20, and force cell 7 is all connected with data acquisition recorder 19 with displacement transducer 20.Force cell 7 is arranged on bolt 2, passes to the thrust of bolt 2 for measuring screw-driven part 1, and by related data transmission to data acquisition recorder 19.Include two displacement transducers 20 in the present embodiment, two displacement transducers 20 at right angle setting mutually, two displacement transducers 20 are respectively used to measure in rotor turns process, displacement in the plane perpendicular to rotor turning axle in two orthogonal radial directions, such as perpendicular in a plane of rotor turning axle, it has some radial directions through rotor turning axle, in the present invention, mainly measure the displacement of wherein two orthogonal radial upper rotor parts; Related data is passed to data acquisition recorder 19 by two displacement transducers 20, so that follow-up for the analysis to rotor stability.
With reference to Fig. 3, a kind of vertical rotor dynamic radial load maintainer provided by the invention, also comprise testing table shell 21, motor 15 and motor support base 17, testing table shell 21 is arranged on a testing table, and motor 15 is arranged on the upper end of testing table shell 21 by electric machine support 17; It is inner that one rotor is installed on testing table shell 21, and the output shaft 16 of motor is connected with rotor coaxial by a shaft coupling 14, thus motor 15 rotor driven can be made to rotate.Housing is installed on testing table shell 21, and the runner of bracket end is relative with shaft coupling 14, the axis of runner and the axis being parallel of rotor, and the center line of support, the axis of bolt 2, the axis of threaded coupling nut are positioned at be same as on straight line and perpendicular to the axis of rotor.
Operational process below in conjunction with accompanying drawing 1-3 vertical rotor dynamic radial load maintainer is described in further detail:
Time static, testing table shell 21 is vertically arranged on a testing table by pedal line, motor support base 17 is bolted and is arranged on testing table shell 21, dragging motor 15 is bolted and is arranged on motor support base 17, the output shaft 16 of motor realizes installing with rotor 18 by shaft coupling 14 and is connected, it is inner that rotor 18 is arranged on testing table shell 21, two displacement transducers 20 are vertically mounted on testing table shell 21 mutually, radial loaded mechanism is arranged on motor support base 17, vertical with rotor rotation axis, force cell 7 is arranged on bolt 2, the data line of drawing from each sensor is connected to data acquisition recorder 19.
During test, start dragging motor 15, motor output shaft 16 is rotated by shaft coupling 14 rotor driven 18, rotate clockwise handwheel 5, drive screw-driven part 1 to rotate, form straight-line displacement and promote force cell 7, and then marched forward along orbital drive with two runners by force cell promotion support 9, and fit to the surface of shaft coupling 14, do with rotating.Rotor 18 is in rotation process, and the vibration of generation is measured by the displacement transducer 20 of two orthogonal installations, and the radial force size of loading is measured by force cell 7, and whole measurement data is gathered and record by data acquisition recorder 19.In measuring process, rotor 18 is in rotation status always, therefore the invention belongs to kinetic measurement.Measure complete, rotate counterclockwise handwheel 5 and runner can be made to move to the direction away from shaft coupling 14, cancel radial force, then close dragging motor 15.
The data obtained by displacement transducer 20 can be used for analyzing shaft core position when rotor 18 rotates and dynamic rule thereof, the data obtained by force cell 7 can be used for carrying out coupling analysis with displacement data, obtain the rotation dynamic perfromance of different radial force state lower rotor part, and find optimal radial power.
A kind of vertical rotor dynamic radial load maintainer provided by the invention, dynamic load can be realized, combined sensor and data acquisition and analysis system, rotor stability is analyzed in on-line testing, for the hydrodynamics design and optimization of the equipment rotors such as canned motor pump rotor provides test figure reference.
Present invention also offers a kind of vertical rotor stability test scheme, concrete employing vertical rotor test unit as above, concrete steps are as follows:
The first step, starter motor, makes motor drag rotor turns;
Second step, rotates handwheel, and handwheel drives screw-driven part to move axially, and screw-driven part drives the radial motion of runner along rotor of bracket end by being arranged on a force cell on bolt and bolt, and makes runner be fitted on the surface of shaft coupling;
3rd step, the axis thrust of screw-driven part measured by force cell, displacement sensor rotor axial displacement and radial displacement, and the data of acquisition are transferred to data acquisition recorder by force cell and displacement transducer;
4th step, shaft core position when rotating according to the data analysis rotor of displacement transducer transmission and dynamic rule thereof; The data that the data transmit force cell and displacement transducer transmit carry out coupling analysis, obtain the rotation status characteristic of different radial force state lower rotor part, and find optimum rotor radial power.
In sum, the invention provides a kind of vertical rotor dynamic radial load maintainer based on certain canned motor pump vertical rotor Test-bed Design and stability test scheme, comprise housing, support and handwheel, support is positioned at housing and can be inner mobile along it, one end of support is provided with two runners and stretches out one end of housing, improves radial loaded mechanical stability.On the other end of housing, a handwheel to be put in housing by screw-driven part and bolt successively and is connected with support, rotates handwheel and support can be made to move to the outside of main casing.Radial loaded mechanism is arranged on a testing table shell, and be provided with a rotor be connected with motor output shaft by shaft coupling in testing table shell, shaft coupling is close to by runner; Test unit also comprises data acquisition recorder and coupled force cell and displacement transducer, the radial force data that force cell produces for measuring screw-driven part, displacement transducer for measuring rotor in rotation process after radial loaded, perpendicular to the displacement in two radial directions orthogonal in the plane of rotor rotation axis.
Those skilled in the art should be understood that the present invention can realize with other concrete forms many and not depart from the spirit or scope of the present invention.Although describe embodiments of the invention, the present invention should be understood and should not be restricted to these embodiments, within the spirit and scope of the invention that those skilled in the art can define as appended claims, make change and amendment.
Claims (9)
1. a vertical rotor dynamic radial load maintainer, is characterized in that, described vertical rotor dynamic radial load maintainer comprises housing, support, screw-driven part and handwheel, wherein,
Described housing is the box like structure of one end open, and described support is positioned at described housing and the opening of described housing is stretched out in one end, the external part of described support is at least provided with a runner;
Described screw-driven part puts in described housing from the other end of described housing, and is threaded with described housing, and one end that described screw-driven part puts in described housing is connected with described support; Described handwheel is arranged on described screw-driven part and is positioned on one end of described hull outside, rotates described handwheel and described screw-driven part is rotated and axially promotes described support to move to the outside of described main casing.
2. according to vertical rotor dynamic radial load maintainer according to claim 1, it is characterized in that, the external part of described support is arc-shaped, and the two ends of described support circular arc are respectively arranged with described runner.
3. according to vertical rotor dynamic radial load maintainer according to claim 1, it is characterized in that, described runner comprises rotating shaft, bearing and bearing outside, described rotating shaft arrange on the bracket and its central shaft perpendicular to the moving direction of described support, described bearing outside is located in described rotating shaft by described bearing holder (housing, cover).
4. according to vertical rotor dynamic radial load maintainer according to claim 3, it is characterized in that, described rotating shaft is fixing on the bracket by described retainer nut.
5. according to vertical rotor dynamic radial load maintainer according to claim 1, it is characterized in that, one end that described screw-driven part is positioned at described hull outside is provided with setscrew nut.
6. according to vertical rotor dynamic radial load maintainer according to claim 1, it is characterized in that, described screw-driven part is bolted described support, and described bolt is provided with force cell, and described force cell is also connected with a data acquisition recorder.
7. according to vertical rotor dynamic radial load maintainer according to claim 6, it is characterized in that, described data acquisition recorder is also connected with two for measuring rotor at the displacement transducer perpendicular to two orthogonal radial top offsets in the plane of its turning axle.
8., according to the vertical rotor dynamic radial load maintainer in claim 1-7 described in any one, it is characterized in that, also comprise testing table shell and motor,
Described motor is installed on described testing table shell by motor support base, and a rotor is positioned at testing table shell, and the output shaft of described motor is connected with described rotor by shaft coupling;
Described radial loaded mechanism is arranged on described testing table shell, and perpendicular to the rotation of described rotor, described runner is close on described shaft coupling.
9. a vertical rotor stability test scheme, is characterized in that, adopt vertical rotor dynamic radial load maintainer as claimed in claim 8, concrete steps are as follows:
Step 1, starts described motor, rotor turns described in described motor drag;
Step 2, rotates described handwheel, and described handwheel drives described screw-driven part and moves axially, and described screw-driven part promotes the radial motion of runner along described rotor of described bracket end, and makes described runner be fitted on the surface of described shaft coupling;
Step 3, vertical rotor test unit also includes force cell, displacement transducer and data acquisition recorder, the axis thrust of described screw-driven part measured by described force cell, rotor described in described displacement sensor is perpendicular to the displacement in two orthogonal radial directions in the plane of its turning axle, and the data of acquisition are transferred to data acquisition recorder by described force cell and institute's displacement sensors;
Step 4, shaft core position when rotating according to the data analysis rotor of institute's displacement sensors transmission and dynamic rule thereof; The data that the data transmit described force cell and institute's displacement sensors transmit carry out coupling analysis, obtain the rotation status characteristic of different radial force state lower rotor part, and find optimum rotor radial power.
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Cited By (5)
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| CN104634562A (en) * | 2015-02-05 | 2015-05-20 | 南京理工大学 | Bearing direction manual loading mechanism and loading method for rolling linear guide rail pair |
| CN105181325A (en) * | 2015-10-26 | 2015-12-23 | 东方电气集团东方电机有限公司 | Mechanical model device for rotor of motor |
| CN106907336A (en) * | 2017-03-13 | 2017-06-30 | 江苏大学 | A kind of mixed-flow pump impeller instantaneous radial measurement apparatus and method |
| CN108519233A (en) * | 2018-05-31 | 2018-09-11 | 江苏省机械研究设计院有限责任公司 | A kind of rotary shaft radial loaded experimental rig |
| CN112461641A (en) * | 2020-12-08 | 2021-03-09 | 哈尔滨理工大学 | One-way thread transmission static force loading device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104634562A (en) * | 2015-02-05 | 2015-05-20 | 南京理工大学 | Bearing direction manual loading mechanism and loading method for rolling linear guide rail pair |
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| CN106907336A (en) * | 2017-03-13 | 2017-06-30 | 江苏大学 | A kind of mixed-flow pump impeller instantaneous radial measurement apparatus and method |
| CN106907336B (en) * | 2017-03-13 | 2019-04-30 | 江苏大学 | A kind of mixed-flow pump impeller instantaneous radial measuring device and method |
| CN108519233A (en) * | 2018-05-31 | 2018-09-11 | 江苏省机械研究设计院有限责任公司 | A kind of rotary shaft radial loaded experimental rig |
| CN112461641A (en) * | 2020-12-08 | 2021-03-09 | 哈尔滨理工大学 | One-way thread transmission static force loading device |
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