CN107489609A - Vertical gap mobilization dynamic characteristic coefficient test device - Google Patents
Vertical gap mobilization dynamic characteristic coefficient test device Download PDFInfo
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- CN107489609A CN107489609A CN201710547786.2A CN201710547786A CN107489609A CN 107489609 A CN107489609 A CN 107489609A CN 201710547786 A CN201710547786 A CN 201710547786A CN 107489609 A CN107489609 A CN 107489609A
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- test
- gap
- main shaft
- dynamic characteristic
- top chock
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a kind of vertical gap mobilization dynamic characteristic coefficient test device, including Autorotation driving device, whirling motion drive device, gap flow circuit pipeline and measurement apparatus, wherein：Autorotation driving device includes rotation driving motor, test main shaft, test outer barrel, top chock and step, rotation driving motor driving test main shaft rotation；Test main shaft connection top chock and step；Main shaft is tested through test outer barrel, tests between main shaft and test outer barrel and forms test section gap；Test section gap communication gap flow circuit pipeline；Measurement apparatus is arranged on Autorotation driving device；Whirling motion drive device includes whirling motion motor, hollow shaft and pulley apparatus, and whirling motion motor driving hollow shaft rotates；Hollow shaft produces whirling motion by belt pulley drive shaft.Precise structure of the present invention, design is superior, and accuracy of data acquisition is high；The present invention changes offset by adjusting the gear of eccentric bearing block, disclosure satisfy that the test request of different operating modes.
Description
Technical field
The present invention relates to pump housing technical field, in particular it relates to vertical gap mobilization dynamic characteristic coefficient test device.
Background technology
Canned-motor pump has important use in national energy and national defence, and there is this pump stationary seal, vibration to make an uproar
The low advantage of sound.Shielded electric pump is typically joined directly together by motor shaft by shield electric machine and impeller and formed.Inside shield electric machine
There is a long and narrow annular gap vertically, wherein flowing through cooling water, the cooling water forms an inter-species between rotor and stator
Clearance flow is moved, for lubricating bearing and cooling motor.Gap flowing has a major impact to shielded electric pump rotor dynamic behavior, between test
It is significant for studying its influence to canned-motor pump rotor dynamic behavior that clearance flow moves dynamic characteristic coefficients.
The content of the invention
For in the prior art the defects of, it is an object of the invention to provide a kind of vertical gap mobilization dynamic characteristic coefficient to survey
Trial assembly is put.
According to a kind of vertical gap mobilization dynamic characteristic coefficient test device provided by the invention, including rotation driving dress
Put, whirling motion drive device, gap flow circuit pipeline and measurement apparatus, wherein：
The Autorotation driving device includes rotation driving motor, test main shaft, test outer barrel, top chock and lower bearing
Seat, the rotation driving motor drive the test main shaft rotation by shaft coupling；The test main shaft upper end connection upper bearing (metal)
Seat, lower end connection step；The test main shaft run through the test outer barrel, the test main shaft and it is described test outer barrel it
Between gap be present, form test section gap；
The upper and lower part in the test section gap is respectively communicated with the gap flow circuit pipeline；
The measurement apparatus is arranged on the Autorotation driving device；
The whirling motion drive device includes whirling motion motor, hollow shaft and pulley apparatus, the whirling motion driving electricity
Machine driving hollow shaft rotates；The hollow shaft connects top chock and step by pulley apparatus, and then drives test
Main shaft produces whirling motion.
Preferably, the measurement apparatus includes eddy current displacement sensor, temperature sensor, pull pressure sensor and pressure
Gap sensor, wherein：
The eddy current displacement sensor is arranged in the displacement transducer mounting seat of test outer barrel；
The upper and lower part of the test outer barrel is provided with temperature sensor and differential pressure pickup, intersegmental for measuring test
Gap entrance and the temperature and pressure in exit；
The pull pressure sensor is respectively arranged on top chock and step, for measuring main shaft to top chock
With the active force of step.
Preferably, the top chock and step are the bearing block of eccentric bearing block, top chock and step
Centre circle has offset relative to outer circle center, and offset can be adjusted by the gear on top chock and step.
Preferably, the gap flow circuit pipeline includes import pipeline section, outlet pipe section, circulating pump and regulating valve, its
In：
The import pipeline section connects test section gap bottom；The outlet pipe section connects test section gap top；
The flowing of fluid in the circulating pump driving gap flow circuit pipeline；
The regulating valve is used for the uninterrupted for adjusting fluid in the flow circuit pipeline of gap.
Preferably, the pulley apparatus includes double pulley and two timing belts, whirling motor driving double pulley band
Dynamic two timing belts operating, two timing belts connect the centre circle of top chock and step respectively.
Preferably, the top chock and step are distinguished at least one pull pressure sensor and transported with pulley apparatus
Dynamic direction is set, the seat heart of bearing block when being rotated for balancing pulley device.
Preferably, in addition to it is used for the pull pressure sensor mounting seat for installing pull pressure sensor, the pressure senses
Device mounting seat is in loosening state before pull pressure sensor is installed, and is in after pull pressure sensor is installed and holds out against state.
Preferably, multiple valves are additionally provided with the gap flow circuit pipeline, for adjusting gap flow circuit pipe
The flow direction of fluid in road.
Compared with prior art, the present invention has following beneficial effect：
1st, precise structure of the present invention, design is superior, and accuracy of data acquisition is high；
2nd, the present invention changes offset by adjusting the gear of eccentric bearing block, meets the test request of different operating modes；
3rd, the present invention by measure test the real-time orbit of shaft center of main shaft, main shaft have fluid matasomatism and without fluid matasomatism under
Stress size and Orientation and fluid gap mobilization dynamic coefficient is entered in the pressure difference and temperature of the inlet and outlet in test section gap
The specific analysis of row.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the structural representation of vertical gap mobilization dynamic characteristic coefficient test device；
Fig. 2 is the Autorotation driving device sectional view of vertical gap mobilization dynamic characteristic coefficient test device；
Fig. 3 is Autorotation driving device bearing block and the installation diagram of pull pressure sensor；
Fig. 4 is the longitdinal cross-section diagram of the test outer barrel of the present invention；
Fig. 5 is the structural representation of the test outer barrel of the present invention；
Fig. 6 is the view in transverse section of the test outer barrel of the present invention；
Fig. 7 is the concentric shafts bearing of the present invention and the contrast schematic diagram of eccentric bearing block；
Fig. 8 is the combination diagram when upper and lower axle bearing of the present invention is normal；
Fig. 9 is schematic cross-sections of the Fig. 8 on A-A directions；
Figure 10 is schematic cross-sections of the Fig. 8 on B-B directions；
Figure 11 be the present invention upper and lower axle bearing integral translation, the combination diagram of uniform gap；
Figure 12 is schematic cross-sections of the Figure 11 on A-A directions；
Figure 13 is schematic cross-sections of the Figure 11 on B-B directions；
Figure 14 is that the offset of the upper and lower axle bearing of the present invention is different, the first combination diagram during non-uniform gap；
Figure 15 is schematic cross-sections of the Figure 14 on A-A directions；
Figure 16 is schematic cross-sections of the Figure 14 on B-B directions；
Figure 17 is that the offset of the upper and lower axle bearing of the present invention is different, the second combination diagram during non-uniform gap；
Figure 18 is schematic cross-sections of the Figure 17 on A-A directions；
Figure 19 is schematic cross-sections of the Figure 17 on B-B directions；
Shown in figure：
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present invention
Protection domain.
As shown in Figures 1 to 6, according to a kind of vertical gap mobilization dynamic characteristic coefficient test device provided by the invention,
Including：Including Autorotation driving device, whirling motion drive device, gap flow circuit pipeline and measurement apparatus, wherein：Rotation drives
Device includes rotation driving motor, test main shaft, test outer barrel 4, top chock 2 and step 1, and rotation driving motor leads to
Cross the driving test main shaft rotation of drum-shaped tooth type shaft coupling 13；The test main shaft upper end connects top chock by positive coupling
2, lower end connects step 1 by positive coupling；Top chock 2 is arranged on motive bearing support 8；Step 1 is pacified
Dress is on the base 3；Test main shaft to be arranged on test section support 26 through test outer barrel 4, test outer barrel 4, test main shaft and survey
Gap be present between examination outer barrel, form test section gap 32, the test section gap 32 is confined space.It should be noted that
Top chock 2 and step 1 are eccentric bearing block, and the top chock 2 and step 1 are eccentric bearing block, upper axle
The bearing block centre circle of bearing 2 and step 1 has an offset relative to outer circle center, offset can by top chock 2 or
Gear regulation on person's step 1.
Further, measurement apparatus is arranged on Autorotation driving device, and the measurement apparatus senses including current vortex displacement
Device, temperature sensor, pull pressure sensor 31 and differential pressure pickup, wherein：The upper and lower part in test section gap 32 is set
The displacement transducer mounting seat 6 of eddy current displacement sensor can be inserted by having, and eddy current displacement sensor is pacified by displacement transducer
Seat 6 is filled close to experiment main shaft, orbit of shaft center figure line, key signal waveform and the reality of eddy current displacement sensor measurement test main shaft
When rotating speed.
In more detail, test on outer barrel 4 and be additionally provided with pressure sensor mounting seat 5, for installing differential pressure pickup, pressure
Gap sensor is used for the pressure drop for testing test section gap 32；The upper and lower part of test outer barrel 4 is additionally provided with temperature sensor, uses
Temperature in the entrance of measurement test section gap 32 and exit；4 drawings are respectively arranged with top chock 2 and step 1
Pressure sensor 31, pull pressure sensor 31 are arranged in pull pressure sensor mounting seat, the pull pressure sensor mounting seat
Loosening state is in before pull pressure sensor is installed, is in after pull pressure sensor is installed and holds out against state.Pressure senses
Device 31 is used to measure test main shaft to top chock 2 and the active force of step 1.Wherein：3 pull pressure sensor 31 are uniform
It is arranged on around top chock 2 or step 1, another pull pressure sensor 31 is according to pulley apparatus transmission side
To setting, the seat heart of the bearing block brought when being rotated for balancing pulley device.Drawn by regulating bolt and nut to adjust
The elastic and top chock 2 of pressure sensor 31 or the balance of step 1, ensure that the stress of pull pressure sensor 31 is fitted with this
In and the relative position of top chock 2 or step 1 and test main shaft.
Whirling motion drive device is illustrated below, whirling motion drive device includes whirling motion motor, hollow shaft and skin
Pulley arrangement, whirling motion motor are arranged on the top of whirling motion drive device, and whirling motion motor driving hollow shaft rotates；It is described
Hollow shaft connects top chock 2 and step 1 by pulley apparatus, and then drive shaft produces whirling motion.The belt pulley
Device includes double pulley 9 and two arc tooth synchronous belts 14, and whirling motor driving double pulley drives two circle-arc tooth synchronizations
Band 14 operates, and two arc tooth synchronous belts 14 connect the centre circle of top chock 2 and step 1 respectively.
Further illustrating, gap flow circuit pipeline includes the import and export pipeline 21, circulating pump and regulating valve, wherein：Institute
State the bottom of import pipeline section connection test section gap 32 of the import and export pipeline 21；The outlet pipe section connection of the import and export pipeline 21 is surveyed
Try the intersegmental top of gap 32；The flowing of fluid in the circulating pump driving gap flow circuit pipeline；The regulating valve is used to adjust
Internode clearance flow moves the uninterrupted of fluid in circulation line.Wherein, fluid enters test section from the import pipeline section of export pipeline 21
The bottom of gap 32, the outlet pipe section of the import and export pipeline 21 is flowed out into from the top of test section gap 32.
More specifically, multiple valves are additionally provided with the gap flow circuit pipeline, are followed for adjusting gap flowing
The flow direction of fluid and flow velocity in endless tube road.
In detail, First Transition supporting plate 10, the second transition branch are passed through between Autorotation driving device and whirling motion drive device
The transition supporting plate 12 of fagging 11 and the 3rd is fastenedly connected.
The present invention releases test main shaft stress to the active force of bearing block by measuring test main shaft and then anti-, it is possible thereby to
Deduce test main shaft has fluid stream out-of-date and without the out-of-date stress of fluid stream in gap, and then obtains fluid to rotor
Active force.
Using identical offset and the top chock 2 and step 1 of eccentric direction, test main shaft after assembling relative to
It is eccentric that test outer barrel 4 produces uniform position vertically；Use the He of top chock 2 of different offsets or different eccentric directions
Step 1, the test main shaft after assembling produce position bias heterogeneous vertically relative to test outer barrel 4, thus, it is possible to
Obtain testing stress of the main shaft under different offsets and heeling condition.
In the case of the position bias of a variety of test main shafts, flow, flow direction and the survey of the fluid in adjustment test section gap 32
The speed of mainshaft is tried, the oscillation crosswise orbit of shaft center of the main shaft of measurement test in real time and the axial float of test main shaft.
Under kinds of experiments operating mode, test section can be obtained by the inlet outlet pressure differential for the fluid for measuring test section gap 32
Flow resistance of the fluid in gap 32 in the case of different test main spindle's bias, different rotating speeds and different flow.
By testing orbit of shaft center and gap flowing of the main shaft under different rotational velocities and eddy velocity to test
The active force of main shaft, gap mobilization dynamic characteristic coefficient now, including rigidity, damping and additional mass can be calculated, is drawn
Affecting laws of the difference test speed of mainshaft to gap mobilization dynamic characteristic coefficient.
Orbit of shaft center and gap flowing of the main shaft under different offsets are tested to testing the active force of main shaft, and then is calculated
Go out gap mobilization dynamic characteristic coefficient now, draw affecting laws of the offset for gap mobilization dynamic characteristic coefficient.
Under different gap traffic flow, temperature and different pre- curl, tested by measuring main shaft orbit of shaft center and
Gap flowing and then calculates gap mobilization dynamic characteristic coefficient now to testing the active force of main shaft, obtain outflow, temperature with
And pre- curl is for the affecting laws of gap mobilization dynamic characteristic coefficient.
Under different gap width, the effect of the orbit of shaft center and gap flowing of main shaft to test main shaft is tested by measuring
Power, and then gap mobilization dynamic characteristic coefficient now is calculated, draw gap width for gap mobilization dynamic characteristic coefficient
Affecting laws.
The present invention is a kind of vertical gap mobilization dynamic characteristic coefficient test device, coordinates targeted experiment content, state
It is inside and outside to there is no such a test device.
The present invention controls flow, temperature and the flow direction of fluid by test section gap 32；There is position by assembling
Eccentric bearing block, test main shaft is set to produce position bias relative to test outer barrel；By adjusting the gear of eccentric bearing block, make
Test main shaft and different offsets are produced according to requirement of experiment vertically relative to test outer barrel；Tested using being assemblied in above and below outer barrel
The real-time orbit of shaft center of the eddy current displacement sensor measurement test main shaft in portion；Utilize the pressure being assemblied on eccentric bearing block
Sensor 31 in real time measurement test main shaft have fluid matasomatism and without fluid matasomatism under stress size and Orientation；Using being assemblied in
The fluid in the differential pressure pickup measurement test section gap 32 that test section gap 32 is imported and exported is in the different test speeds of mainshaft, test master
Pressure drop during shaft position bias.
The present invention is additionally provided with Pitot tube 25, and the Pitot tube 25 is arranged at the top in test section gap 32, for measuring
The flow velocity of fluid in test section gap 32.
As shown in fig. 7, bearing block is designed as concentric form and position eccentric form, wherein in the bearing of position eccentric form
The periphery axis of disc axis and bearing block has position deviation, and the position, which is deviateed, to be customized according to experiment.
As shown in figure 8, when arrange in pairs or groups different journal bearings when, can be formed it is a variety of test main shafts and test outer barrel 4 between
Test section gap 32, wherein, test main shaft is armature spindle, and test outer barrel 4 is stator.
Need to regulate the offset of needs before experiment and test main shaft biased form and be connected with gap flow circuit pipeline,
Control valve is opened and closed to determine the flow direction of gap flowing.In the different test speeds of mainshaft, different gap flowing stream during experiment
Measured under speed and different gap streaming flow inlet temperature, and the current vortex displacement by being arranged on test outer barrel 4 passes
Sensor obtains testing the real-time orbit of shaft center of main shaft and the axial float of test main shaft.
In experiment, differential pressure pickup, the temperature sensor test gap for being arranged in the inlet and outlet of test section gap 32 are utilized
The pressure drop of flowing and temperature rise situation, and utilize the real-time traffic of the flowmeter measurement gap flowing in the flow circuit pipeline of gap.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the case where not conflicting, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (8)
1. a kind of vertical gap mobilization dynamic characteristic coefficient test device, it is characterised in that driven including Autorotation driving device, whirling motion
Dynamic device, gap flow circuit pipeline and measurement apparatus, wherein：
The Autorotation driving device includes rotation driving motor, test main shaft, test outer barrel, top chock and step,
The rotation driving motor drives the test main shaft rotation by shaft coupling；The test main shaft upper end connection top chock,
Lower end connects step；The test main shaft runs through the test outer barrel, between the test main shaft and the test outer barrel
Gap be present, form test section gap；
The upper and lower part in the test section gap is respectively communicated with the gap flow circuit pipeline；
The measurement apparatus is arranged on the Autorotation driving device；
The whirling motion drive device includes whirling motion motor, hollow shaft and pulley apparatus, and the whirling motion motor drives
Dynamic hollow shaft rotates；The hollow shaft connects top chock and step by pulley apparatus, and then drives test main shaft
Produce whirling motion.
2. vertical gap mobilization dynamic characteristic coefficient test device according to claim 1, it is characterised in that the measurement
Device includes eddy current displacement sensor, temperature sensor, pull pressure sensor and differential pressure pickup, wherein：
The eddy current displacement sensor is arranged in the displacement transducer mounting seat of test outer barrel；
The upper and lower part of the test outer barrel is provided with temperature sensor and differential pressure pickup, enters for measuring test section gap
The temperature and pressure at mouthful and exit；
The pull pressure sensor is respectively arranged on top chock and step, for measure main shaft to top chock and under
The active force of bearing block.
3. vertical gap mobilization dynamic characteristic coefficient test device according to claim 1, it is characterised in that the upper axle
Bearing and step are eccentric bearing block, and the bearing block centre circle of top chock and step has bias relative to outer circle center
Amount, offset can be adjusted by the gear on top chock and step.
4. vertical gap mobilization dynamic characteristic coefficient test device according to claim 1, it is characterised in that the gap
Flow circuit pipeline includes import pipeline section, outlet pipe section, circulating pump and regulating valve, wherein：
The import pipeline section connects test section gap bottom；The outlet pipe section connects test section gap top；
The flowing of fluid in the circulating pump driving gap flow circuit pipeline；
The regulating valve is used for the uninterrupted for adjusting the fluid in the flow circuit pipeline of gap.
5. vertical gap mobilization dynamic characteristic coefficient test device according to claim 1, it is characterised in that the belt
Wheel apparatus includes double pulley and two timing belts, and whirling motor driving double pulley drives two timing belt operatings, and two same
Step band connects the centre circle of top chock and step respectively.
6. vertical gap mobilization dynamic characteristic coefficient test device according to claim 2, it is characterised in that the upper axle
Bearing and step are distinguished at least one pull pressure sensor and set with the pulley apparatus direction of motion, for balancing belt
The seat heart of bearing block when wheel apparatus rotates.
7. vertical gap mobilization dynamic characteristic coefficient test device according to claim 2, it is characterised in that also include using
In the pull pressure sensor mounting seat of installation pull pressure sensor, the pull pressure sensor mounting seat is in installation pressure sensing
Loosening state is in before device, is in after pull pressure sensor is installed and holds out against state.
8. vertical gap mobilization dynamic characteristic coefficient test device according to claim 1, it is characterised in that the gap
Multiple valves are additionally provided with flow circuit pipeline, for adjusting the flow direction of fluid in the flow circuit pipeline of gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547786.2A CN107489609B (en) | 2017-07-06 | 2017-07-06 | Vertical gap flow dynamic characteristic coefficient testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710547786.2A CN107489609B (en) | 2017-07-06 | 2017-07-06 | Vertical gap flow dynamic characteristic coefficient testing device |
Publications (2)
| Publication Number | Publication Date |
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| CN107489609A true CN107489609A (en) | 2017-12-19 |
| CN107489609B CN107489609B (en) | 2020-01-07 |
Family
ID=60644294
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710547786.2A Active CN107489609B (en) | 2017-07-06 | 2017-07-06 | Vertical gap flow dynamic characteristic coefficient testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109359430A (en) * | 2018-11-29 | 2019-02-19 | 上海交通大学 | Vertical long shaft pump clearance seal calculation method |
| CN107489609B (en) * | 2017-07-06 | 2020-01-07 | 上海交通大学 | Vertical gap flow dynamic characteristic coefficient testing device |
| CN113092298A (en) * | 2021-03-22 | 2021-07-09 | 三峡大学 | Current-carrying frictional wear simulation test device and method for lower carbon brush and collecting ring of eccentric runout of hydraulic generator |
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| CN113092298A (en) * | 2021-03-22 | 2021-07-09 | 三峡大学 | Current-carrying frictional wear simulation test device and method for lower carbon brush and collecting ring of eccentric runout of hydraulic generator |
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| CN107489609B (en) | 2020-01-07 |
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