CN107132048B - A kind of test system of double, asymmetrical bearing rotor system vibration characteristics - Google Patents
A kind of test system of double, asymmetrical bearing rotor system vibration characteristics Download PDFInfo
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- CN107132048B CN107132048B CN201710495914.3A CN201710495914A CN107132048B CN 107132048 B CN107132048 B CN 107132048B CN 201710495914 A CN201710495914 A CN 201710495914A CN 107132048 B CN107132048 B CN 107132048B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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- Acoustics & Sound (AREA)
- Testing Of Balance (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention discloses a kind of test system of double, asymmetrical bearing rotor system vibration characteristics, including double, asymmetrical feature generation device；Double, asymmetrical feature generation device includes mounting plate, speed regulating motor and two asymmetric bearing generation devices；Speed regulating motor and two asymmetric bearing generation devices are fixedly mounted on mounting plate；The output shaft of speed regulating motor connects asymmetric shaft by flexible clutch, and asymmetric shaft is supported in the bearing of two asymmetric bearing generation devices；Several balancing frames are installed on asymmetric shaft between two asymmetric bearing generation devices.The present invention can be used for studying unstability under different bearing asymmetric combinations, touch rub, unbalance response, the rules such as dynamic balancing, effectively expanded the range of rotor oscillation characteristic research.The test result obtained using the present invention, can provide accurate data for the design and spot dynamic balance of double, asymmetrical bearing rotor system.
Description
Technical field
The invention belongs to bearing rotor systems to test field, and in particular to a kind of double, asymmetrical bearing rotor system vibration
The test system of characteristic.
Background technique
In actual industrial production, there is the rotating machineries that a major class has asymmetrical rotor or stator, such as generate electricity
Mechanical, electrical motivation, crankshaft, blower and cracked rotor etc..From stringent definition, full symmetric rotor-support-foundation system should be simultaneously
With axisymmetric rotor and isotropic supporting structure, this is very harsh item for most of rotating machinery
Part.Actual rotor structure generally requires to install corresponding workpiece, such as steam turbine on it to realize specific function
Generator amature needs to slot on the ontology of axis, bearing body is divided into canine tooth and small tooth, rotor to meet power generation requirements
Ontology is unsymmetric structure.In addition, widely applied sliding bearing and rolling bearing can not generally meet respectively in rotating machinery
Requirement to the same sex.Double, asymmetrical refers to that rotor and bearing part exist simultaneously non-symmetrical features, at this time rotor bearing system
Include Periodic time-varying coefficient in the differential equation of motion of system, parametric vibration system is belonged on mechanics.Rotor is asymmetric and bearing
It is asymmetric to be referred to as double, asymmetrical bearing rotor system, it will lead to system response amplification in some cases, so that complete machine is shaken
Dynamic problem is very serious or even injury device.In addition, the dynamic balancing of double, asymmetrical bearing rotor system is also increasingly complex.For
This, needs to study the vibration mechanism of double, asymmetrical bearing rotor system, inhibits the parameter of double, asymmetrical bearing rotor system
Vibration.
Summary of the invention
The purpose of the present invention is to provide a kind of test system of double, asymmetrical bearing rotor system vibration characteristics,
To solve the parametric vibration test problem of double, asymmetrical bearing rotor system.
In order to achieve the above object, the technical scheme is that
A kind of test system of double, asymmetrical bearing rotor system vibration characteristics, including double, asymmetrical feature produce
Generating apparatus；Double, asymmetrical feature generation device includes mounting plate, speed regulating motor and two asymmetric bearing generation devices；It adjusts
Speed motor and two asymmetric bearing generation devices are fixedly mounted on mounting plate；The output shaft of speed regulating motor passes through flexible connection
Axis device connects asymmetric shaft, and asymmetric shaft is supported in the bearing of two asymmetric bearing generation devices；Two asymmetric bearings
Several balancing frames are installed on the asymmetric shaft between generation device.
Further, asymmetric bearing generation device includes that bearing spider, bolt arrangement, nonlinear spring and adjusting turn
Disk；Bearing spider includes bottom plate, is set vertically on bottom plate there are three the riser that is parallel to each other, respectively the starting stave of two sides, the
Three risers and it is located in the middle the second riser；The top of second riser is equipped with the bearing of support asymmetric shaft；Starting stave and
The top of three risers is equipped with threaded hole, adjusts turntable and is fixedly connected with bolt arrangement, on bolt arrangement and starting stave, third riser
Corresponding threaded hole is threadedly coupled, and one end of the front connected nonlinearity spring of bolt arrangement, the other end of nonlinear spring supports
It holds on bearing.
Further, bolt arrangement and nonlinear spring are horizontally disposed.
Further, mounting plate is strip structure, which is equipped with several longitudinal dovetail grooves；Speed regulating motor
It is fixed on mounting plate with two asymmetric bearing generation devices by dovetail groove.
Further, several balancing frames include the first dynamic balancing disk, center disk and the second dynamic balancing disk disposed in parallel；
The edge of first dynamic balancing disk, center disk and the second dynamic balancing disk is symmetrically arranged with several uneven holes, uneven Kong Zhongneng
The uneven bolt of enough fixed different weight, realizes the application of amount of unbalance.
Further, the cross sectional shape of asymmetric shaft is rectangle, the incomplete round or ellipse for removing circle hat.
It further, further include measuring device；Measuring device includes being set to the first acceleration biography of asymmetric shaft side
Sensor, displacement sensor, tachometer of measuring and the second acceleration transducer；First acceleration transducer, displacement sensor, revolving speed
The signal of measuring instrument acquisition and the second acceleration transducer is transferred to computer by data collector.
It further, further include protective device；Protective device includes brake apparatus；Brake apparatus is braked equipped with cantilever
Piece, cantilever brake(-holder) block lower section are equipped with plastic contact piece, and plastic contact piece is located above asymmetric shaft；Brake apparatus connection speed regulation
Motor；When the vibratory output of rotor-support-foundation system is greater than limit value, asymmetric shaft touches plastic contact piece, triggers brake apparatus, system
Dynamic device delivers a signal to speed regulating motor, and speed regulating motor stops operating, so that rotor steadily stops.
Further, double, asymmetrical feature generation device and protective device are set in a bulletproof glass cover.
Further, asymmetrical rotor refers to that the rotor with on-circular cross-section axis, asymmetric bearing generation device can lead to
It crosses adjustment and generates different dissymmetryc coefficients.Double, asymmetrical bearing rotor system is driven by servo motor, can pass through programming
Control motor is run under specified revolving speed, can also realize acceleration and the decelerating mode of different operating conditions.
Further, the shaft section of rotor has different form, is divided into rectangle, removes the incomplete round and oval of circle hat
Shape, with study different inertia axis directions the moment of inertia and shape to the shadow of double, asymmetrical bearing rotor system parametric vibration characteristic
It rings.
Further, spring bolt structure is parallel to the horizontal plane, and is arranged in rotor two sides；By adjusting bolt arrangement
Precession degree realize that bearing rigidity asymmetry degree continuously adjusts.
Further, different bearing asymmetric combinations can be studied by adjusting two respective asymmetric properties of bearing
Under double, asymmetrical bearing rotor system parametric vibration rule, with achieve the purpose that reduce parametric vibration response amplitude.
Further, in the rotor between be disposed with brake apparatus, brake apparatus is connected to the motor, can be by programming Control system
The behavior of dynamic device.When the vibratory output of rotor-support-foundation system is greater than limit value, brake apparatus can be selectively triggered, can make to turn
Sub steady stopping, can also being kept in contact without stopping.
Further, the bottom of brake apparatus is plastic material, to avoid the bottom of shaft and brake apparatus after bearing unstability
Rotor body is caused to damage when portion is in contact.
Further, a kind of standard for judging rotor unstability is provided, unstability means that the response of rotor can be with the time
Increase and increase, after brake apparatus is triggered because of unstability, revolving speed at this time be can record as unstable revolving speed；
Further, the periphery of center disk and dynamic balancing disk is provided with uniform uneven hole, and amount of unbalance is with different heavy
The uneven bolt of amount replaces, and the bolt of different quality can be added in hole, realize the application of amount of unbalance.
Further, the driving source of double, asymmetrical bearing rotor system is that gravity excitation and imbalance motivate two kinds, this
Invention can study the gravity excitation and uneven excitation group of different directions by loading amount of unbalance in different balance holes
Parametric vibration rule under closing.
Further, in addition to center disk, two balancing frames are arranged in the axial direction, by adding in out of phase
The bolt of different weight is regular come the dynamic balancing for studying double, asymmetrical bearing rotor system parametric vibration system.
Further, experimental system disposed outside has bulletproof glass cover, to prevent from failing because of rotor unstability and brake apparatus
The generation of caused emergency situation, while conveniently to the observation of experimental phenomena.
Compared with the existing technology, the invention has the following advantages:
The test system of double, asymmetrical bearing rotor system vibration characteristics of the present invention turns double, asymmetrical bearing
Subsystem is introduced into bearing rotor system vibration Characteristics, can be used for studying under different bearing anisotropy combinations
Double, asymmetrical bearing rotor system parametric vibration characteristic and dynamic balance running rule, have effectively expanded bearing rotor system
The range of research.In test, the present invention can simply be adjusted according to different needs, passing through, can be in different bearings
To the unstability region measurement of double, asymmetrical bearing rotor system, two frequency multiplication phenomenons of gravimetric response and injustice under anisotropy combination
Weighing apparatus response is studied.Further, it is also possible to study the dynamic balancing rule of double, asymmetrical bearing rotor system.Finally, can be
The design and spot dynamic balance of double, asymmetrical bearing rotor system provide accurate data, reduce vibratory response amplitude to reach
Purpose, for improve double, asymmetrical bearing rotor system design level have vital meaning.
Detailed description of the invention
Fig. 1 is the test system schematic diagram of double, asymmetrical bearing rotor system vibration characteristics；
Fig. 2 is the 3-D view of double, asymmetrical bearing rotor system Test section；
Fig. 3 is the asymmetric shaft schematic diagram of different cross section form；
Fig. 4 is asymmetric bearing generation device schematic diagram；
Fig. 5 is bulletproof glass cover schematic diagram.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
Referring to figures 1-4, a kind of test system of double, asymmetrical bearing rotor system vibration characteristics, including first
Acceleration transducer 1, displacement sensor 2, tachometer of measuring 3, the second acceleration transducer 4, data collector 5, computer 6,
Mounting plate 7, speed regulating motor 8, asymmetric bearing generation device 9, the first dynamic balancing disk 10, center disk 11, the second dynamic balancing
Disk 12, bearing spider 13, uneven hole 14, uneven bolt 15, plastic contact piece 16, brake apparatus 17, flexible clutch 18,
Fastening bolt 19, driving motor erection support 20, asymmetric shaft 21, bolt arrangement 22, nonlinear spring 23, adjust turntable 24,
Bulletproof glass cover 25.
The test system of double, asymmetrical bearing rotor system vibration characteristics, including test device, double, asymmetrical
Feature generation device and protective device.
Double, asymmetrical feature generation device includes mounting plate 7, speed regulating motor 8, asymmetric bearing generation device 9,
One dynamic balancing disk 10, center disk 11, the second dynamic balancing disk 12, bearing spider 13, uneven hole 14, uneven bolt 15, modeling
Property contact chip 16, brake apparatus 17, flexible clutch 18, fastening bolt 19, driving motor erection support 20, asymmetric shaft 21,
Bolt arrangement 22, adjusts turntable 24 at nonlinear spring 23.
Mounting plate 7 is strip structure, which is equipped with longitudinal dovetail groove.Speed regulating motor 8 and two it is non-right
Bearing generation device 9 is claimed to be each attached on mounting plate 7；It is non-right that the output shaft of speed regulating motor 8 is connected by flexible clutch 18
Claim axis 21, asymmetric shaft 21 is supported in the bearing of two asymmetric bearing generation devices 9；Two asymmetric bearing generation devices
First dynamic balancing disk 10, center disk 11 and the second dynamic balancing disk 12 are installed on the asymmetric shaft 21 between 9.First dynamic balancing
The edge of disk 10, center disk 11 and the second dynamic balancing disk 12 is symmetrically arranged with several uneven holes 14, energy in uneven hole 14
The uneven bolt 15 of enough fixed different weight, realizes the application of amount of unbalance.
The cross sectional shape of asymmetric shaft 21 is designed as three kinds of forms, respectively rectangle, remove circle hat incompleteness it is round and
Ellipse.During processing, the differently curved asymmetric stiffness section several groups of different cross section form need to be processed, to pass through
Control variate method studies bending stiffness asymmetry degree and different cross section form and shakes to double, asymmetrical bearing rotor system parameter
Dynamic affecting laws.The asymmetric generation device 9 of bearing mainly includes bearing spider 13, bolt arrangement 22,23 and of nonlinear spring
Adjust turntable 24.Bearing spider 13 includes bottom 130, is set on bottom plate 130 vertically there are three the riser being parallel to each other, respectively two
The starting stave 131 of side, third riser 133 and it is located in the middle the second riser 132.The top of second riser 132 is equipped with support
The bearing of asymmetric shaft 21；The top of starting stave 131 and third riser 133 is equipped with threaded hole, adjusts turntable 24 and is fixedly connected
Bolt arrangement 22, bolt arrangement 22 are threadedly coupled with threaded hole corresponding on starting stave 131, third riser 133, bolt arrangement
One end of 22 front connected nonlinearity spring 23, the other end of nonlinear spring 23 support on bearing 90.It is adjusted by rotation
The precession depth that section turntable 24 adjusts bolt arrangement 22 realizes continuously adjusting for bearing rigidity asymmetry degree, nonlinear spring 23
When being compressed, the support stiffness of horizontal direction then increases, and vice versa.So that supporting structure is in the horizontal and vertical directions
With different support stiffness.
Test device includes the first acceleration transducer 1, displacement sensor 2, tachometer of measuring 3, the second acceleration sensing
Device 4, data collector 5 and computer 6.First acceleration transducer 1, displacement sensor 2, tachometer of measuring 3 and second accelerate
Degree sensor 4 is installed on 21 side of asymmetric shaft, for monitoring the acceleration, vibration displacement and revolving speed of asymmetric shaft 21；First
Acceleration transducer 1, displacement sensor 2, tachometer of measuring 3 and the signal of the second acceleration transducer 4 acquisition are adopted by data
Storage 5 is transferred to computer 6.After rotor operation, sensor acquires the vibration signal of double, asymmetrical bearing rotor system, will believe
Number carry out data conversion after, be input in data collector 5, be further processed, analyze and show.
Protective device includes plastic contact piece 16, brake apparatus 17 and bulletproof glass cover 25.Brake apparatus 17, which is arranged in, to be turned
It is sub intermediate, it is connected with speed regulating motor 8, plastic contact piece 16, plastic contact is installed below the cantilever brake(-holder) block of brake apparatus 17
Piece 16 is located at 21 top of asymmetric shaft；When the vibratory output of rotor-support-foundation system is greater than limit value, asymmetric shaft 21 touches plasticity and connects
Contact 16 triggers brake apparatus 17, and brake apparatus 17 delivers a signal to speed regulating motor 8, and speed regulating motor 8 stops operating, so that turning
Sub steady stopping.In addition, the generation to prevent emergency situation caused by failing because of rotor unstability and brake apparatus 17, all tests
Component is protected with bulletproof glass cover 25, while also facilitating the observation to test.The effect of brake apparatus 17 is to provide
A kind of method judging rotor unstability, when brake apparatus is triggered, revolving speed at this time can be labeled as instability speed.In addition,
The bottom of brake apparatus is plastic contact piece 16, with when preventing that the bottom connection of shaft and brake apparatus touches after bearing unstability to turning
Sub- ontology causes to damage, and does not stop in addition, brake apparatus may be arranged as being kept in contact, and is turned with studying double, asymmetrical bearing
The rub impact phenomena of subsystem.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
The scope of patent protection that claims of submission determine.
Claims (8)
1. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics, which is characterized in that including dual non-
Symmetrical feature generation device；
Double, asymmetrical feature generation device includes mounting plate (7), speed regulating motor (8) and two asymmetric bearing generation devices
(9)；Speed regulating motor (8) and two asymmetric bearing generation devices (9) are fixedly mounted on mounting plate (7)；
The output shaft of speed regulating motor (8) is supported on by flexible clutch (18) connection asymmetric shaft (21), asymmetric shaft (21)
In the bearing of two asymmetric bearing generation devices (9)；Asymmetric shaft (21) between two asymmetric bearing generation devices (9)
On several balancing frames are installed；
Asymmetric bearing generation device (9) includes that bearing spider (13), bolt arrangement (22), nonlinear spring (23) and adjusting turn
Disk (24)；Bearing spider (13) includes bottom plate (130), sets that there are three the risers that are parallel to each other on bottom plate (130) vertically, respectively
It the starting staves (131) of two sides, third riser (133) and is located in the middle the second riser (132)；Second riser (132) it is upper
Portion is equipped with the bearing of support asymmetric shaft (21)；The top of starting stave and third riser is equipped with threaded hole, adjusts turntable (24)
It is fixedly connected bolt arrangement (22), bolt arrangement (22) and corresponding threaded hole on starting stave (131), third riser (133)
It is threadedly coupled, one end of the front connected nonlinearity spring (23) of bolt arrangement (22), the other end of nonlinear spring (23) supports
It holds on bearing (90).
2. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, bolt arrangement (22) and nonlinear spring (23) are horizontally disposed.
3. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, mounting plate (7) is strip structure, which is equipped with several longitudinal dovetail grooves；Speed regulating motor (8) and
Two asymmetric bearing generation devices (9) are fixed on mounting plate by dovetail groove.
4. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, several balancing frames include the first dynamic balancing disk (10), center disk (11) and the second dynamic balancing disk disposed in parallel
(12)；The edge of first dynamic balancing disk (10), center disk (11) and the second dynamic balancing disk (12) is symmetrically arranged with several injustice
It weighs hole (14), the uneven bolt (15) of different weight is capable of fixing in uneven hole (14), realizes the application of amount of unbalance.
5. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, the cross sectional shape of asymmetric shaft (21) is rectangle, the incomplete round or ellipse for removing circle hat.
6. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, further includes measuring device；Measuring device includes the first acceleration transducer for being set to asymmetric shaft (21) side
(1), displacement sensor (2), tachometer of measuring (3) and the second acceleration transducer (4)；First acceleration transducer (1), displacement
The signal of sensor (2), tachometer of measuring (3) and the second acceleration transducer (4) acquisition is transferred to by data collector (5)
Computer (6).
7. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1,
It is characterized in that, further includes protective device；Protective device includes brake apparatus (17)；Brake apparatus (17) is braked equipped with cantilever
Piece, cantilever brake(-holder) block lower section are equipped with plastic contact piece (16), and plastic contact piece (16) is located above asymmetric shaft (21)；Braking
Device (17) connects speed regulating motor (8)；When the vibratory output of rotor-support-foundation system is greater than limit value, asymmetric shaft (21) touches plasticity
Contact chip (16) triggers brake apparatus (17), and brake apparatus (17) delivers a signal to speed regulating motor (8), and speed regulating motor (8) stops
Rotation, so that rotor steadily stops.
8. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 7,
It is characterized in that, double, asymmetrical feature generation device and protective device are set in a bulletproof glass cover (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710495914.3A CN107132048B (en) | 2017-06-26 | 2017-06-26 | A kind of test system of double, asymmetrical bearing rotor system vibration characteristics |
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| CN201710495914.3A CN107132048B (en) | 2017-06-26 | 2017-06-26 | A kind of test system of double, asymmetrical bearing rotor system vibration characteristics |
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| CN107132048B true CN107132048B (en) | 2019-05-24 |
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| CN108716975B (en) * | 2018-07-18 | 2023-10-20 | 浙江理工大学 | Vibration reduction experiment table and method for variable parameter rotor using piezoelectric driver |
| EP3839469B1 (en) * | 2019-12-20 | 2022-05-25 | Robert Bosch S.p.A. | Rotor balancer |
| EP3839468B1 (en) * | 2019-12-20 | 2022-02-09 | Robert Bosch S.p.A. | Method for balancing a rotor |
| EP3943906A1 (en) * | 2020-07-23 | 2022-01-26 | Robert Bosch S.p.A. | Manual rotor balancer, method for manually balancing a rotor and control unit |
| CN113092088B (en) * | 2021-03-26 | 2022-07-01 | 北京航空航天大学 | Vertical rotor tester with adjustable asymmetric degree of supporting rigidity |
| CN113432816B (en) * | 2021-06-11 | 2022-10-25 | 中北大学 | Method for testing and controlling unevenness of connection rigidity of aero-engine rotor |
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