CN107132048A - 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
- Publication number
- CN107132048A CN107132048A CN201710495914.3A CN201710495914A CN107132048A CN 107132048 A CN107132048 A CN 107132048A CN 201710495914 A CN201710495914 A CN 201710495914A CN 107132048 A CN107132048 A CN 107132048A
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- bearing
- asymmetric
- double
- asymmetrical
- buncher
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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
-
- 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
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, buncher and two asymmetric bearing generation devices；Buncher and two asymmetric bearing generation devices are fixedly mounted on mounting plate；The output shaft of buncher connects asymmetric shaft by flexible clutch, and asymmetric shaft is supported in the bearing of two asymmetric bearing generation devices；Some balancing frames are installed on asymmetric shaft between two asymmetric bearing generation devices.Unstability that the present invention can be used for studying under different bearing asymmetric combinations, touch rub, unbalance response, the rule such as dynamic balancing, effectively expanded the scope 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 system experiment field, and in particular to a kind of double, asymmetrical bearing rotor system vibration
The test system of characteristic.
Background technology
In actual industrial production, there is a major class has the rotating machinery of asymmetrical rotor or stator, such as generates electricity
Mechanical, electrical motivation, bent axle, blower fan and cracked rotor etc..From strict definition, full symmetric rotor-support-foundation system should be simultaneously
With axisymmetric rotor and isotropic supporting structure, this is very harsh bar for most of rotating machinery
Part.Actual rotor structure generally requires to install corresponding workpiece, such as steam turbine thereon to realize specific function
Generator amature is in order to meet power generation requirements, it is necessary to be slotted on the body of axle, and bearing body is divided into canine tooth and small tooth, rotor
Body is unsymmetric structure.In addition, wide variety of sliding bearing can not typically be met respectively with rolling bearing in rotating machinery
To the requirement of the same sex.Double, asymmetrical is to refer to rotor and supporting member while there are non-symmetrical features, now rotor bearing system
Periodic time-varying coefficient is included 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, system response amplification can be caused 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 suppresses the parameter of double, asymmetrical bearing rotor system, it is necessary to study the vibration mechanism of double, asymmetrical bearing rotor system
Vibration.
The content of the invention
It is an object of the invention 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 the production of double, asymmetrical feature
Generating apparatus；Double, asymmetrical feature generation device includes mounting plate, buncher and two asymmetric bearing generation devices；Adjust
Speed motor and two asymmetric bearing generation devices are fixedly mounted on mounting plate；The output shaft of buncher is joined by flexibility
Axle device connects asymmetric shaft, and asymmetric shaft is supported in the bearing of two asymmetric bearing generation devices；Two asymmetric bearings
Some balancing frames are installed on the asymmetric shaft between generation device.
Further, asymmetric bearing generation device includes bearing spider, bolt arrangement, nonlinear spring and regulation turn
Disk；Bearing spider includes bottom plate, vertical provided with three risers being parallel to each other on bottom plate, respectively the starting stave of both sides, the
Three risers and the second riser positioned at centre；Bearing of the top of second riser provided with support asymmetric shaft；Starting stave and
The top of three risers is provided with screwed hole, and regulation rotating disk is fixedly connected on bolt arrangement, bolt arrangement and starting stave, the 3rd riser
Corresponding screwed hole threaded connection, one end of the anterior connected nonlinearity spring of bolt arrangement, the other end of nonlinear spring is supported
Hold on bearing.
Further, bolt arrangement and nonlinear spring are horizontally disposed.
Further, mounting plate is list structure, and the mounting plate is provided with some longitudinal dovetail grooves；Buncher
It is fixed on two asymmetric bearing generation devices by dovetail groove on mounting plate.
Further, some balancing frames include the first dynamic balancing disk, center disk and the second dynamic balancing disk be arrangeding in parallel；
The edge of first dynamic balancing disk, center disk and the second dynamic balancing disk is arranged with some uneven holes, uneven Kong Zhongneng
The uneven bolt of different weight is enough fixed, the application of amount of unbalance is realized.
Further, the cross sectional shape of asymmetric shaft is rectangle, removes the incompleteness circle or ellipse of circle hat.
Further, in addition to measurement apparatus；The first acceleration that measurement apparatus includes being arranged at asymmetric shaft side is passed
Sensor, displacement transducer, tachometer of measuring and the second acceleration transducer；First acceleration transducer, displacement transducer, rotating speed
Measuring instrument is gathered and the signal of the second acceleration transducer is transferred to computer by data acquisition unit.
Further, in addition to protection device；Protection device includes brake apparatus；Brake apparatus is braked provided with cantilever
Plastic contact piece is installed, plastic contact piece is located above asymmetric shaft below piece, cantilever brake(-holder) block；Brake apparatus connects speed governing
Motor；When the vibratory output of rotor-support-foundation system is more than limit value, asymmetric shaft touches plastic contact piece, triggers brake apparatus, system
Dynamic device delivers a signal to buncher, and buncher stops operating so that rotor steadily stops.
Further, double, asymmetrical feature generation device and protection device are arranged in a bulletproof glass cover.
Further, asymmetrical rotor refers to the rotor with on-circular cross-section axle, and asymmetric bearing generation device can lead to
Cross adjustment and produce different dissymmetryc coefficients.Double, asymmetrical bearing rotor system is driven by servomotor, can pass through programming
Controlled motor is run in the case where specifying rotating speed, can also realize acceleration and the decelerating mode of different operating modes.
Further, the shaft section of rotor has multi-form, is divided into rectangle, removes the incompleteness circle and ellipse of circle hat
Shape, to study the shadow of the moment of inertia and shape to double, asymmetrical bearing rotor system parametric vibration characteristic of different inertia direction of principal axis
Ring.
Further, spring bolt structure and plane-parallel, are arranged in rotor both sides；Pass through adjustment bolt structure
Precession degree realize continuously adjusting for the asymmetric degree of bearing rigidity.
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 reach reduction parametric vibration response amplitude purpose.
Further, in the rotor between be disposed with brake apparatus, brake apparatus is connected with motor, can be by programming Control system
The behavior of dynamic device.When the vibratory output of rotor-support-foundation system is more than limit value, brake apparatus can be optionally triggered, can make to turn
Sub steady stopping, can also keeping contact without stopping.
Further, the bottom of brake apparatus is plastic material, to avoid the bottom of rotating shaft and brake apparatus after bearing unstability
Damage is caused when portion is in contact to rotor body.
Further there is provided a kind of standard for judging rotor unstability, unstability means that the response of rotor can over time
Increase and increase, after brake apparatus is triggered because of unstability, rotating speed now can record as unstable rotating 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 is replaced, and the bolt of different quality can be added in hole, the application of amount of unbalance is realized.
Further, the driving source of double, asymmetrical bearing rotor system is that gravity excitation and imbalance encourage two kinds, this
The gravity that invention can study different directions by loading amount of unbalance in different balance pipes is encouraged and uneven excitation group
Parametric vibration rule under closing.
Further, in addition to center disk, two balancing frames are arranged in the axial direction, by being added in out of phase
The bolt of different weight studies the dynamic balancing rule of double, asymmetrical bearing rotor system parametric vibration system.
Further, experimental system disposed outside has bulletproof glass cover, to prevent because of rotor unstability and brake apparatus failure
The generation of caused emergency situation, while the convenient observation to experimental phenomena.
Relative to prior art, the invention has the advantages that：
The test system of double, asymmetrical bearing rotor system vibration characteristics of the present invention, double, asymmetrical bearing is turned
Subsystem is incorporated 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 scope of research.In test, the need for the present invention can be according to difference, by simply adjusting, you can 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, Ke Yiwei
The design and spot dynamic balance of double, asymmetrical bearing rotor system provide accurate data, to reach reduction vibratory response amplitude
Purpose, for improve double, asymmetrical bearing rotor system design level there is vital meaning.
Brief description of the drawings
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.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Referring to Fig. 1-Fig. 4, a kind of test system of double, asymmetrical bearing rotor system vibration characteristics, including first
Acceleration transducer 1, displacement transducer 2, tachometer of measuring 3, the second acceleration transducer 4, data acquisition unit 5, computer 6,
Mounting plate 7, buncher 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, motor erection support 20, asymmetric shaft 21, bolt arrangement 22, nonlinear spring 23, regulation rotating disk 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 protection device.
Double, asymmetrical feature generation device includes mounting plate 7, buncher 8, asymmetric bearing generation device 9, the
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, motor erection support 20, asymmetric shaft 21,
Bolt arrangement 22, nonlinear spring 23, regulation rotating disk 24.
Mounting plate 7 is list structure, dovetail groove of the mounting plate provided with longitudinal direction.Buncher 8 and two it is non-right
Bearing generation device 9 is claimed to be each attached on mounting plate 7；The output shaft of buncher 8 connects non-right by flexible clutch 18
Claim axle 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, the dynamic balancing disk 12 of center disk 11 and second are installed on the asymmetric shaft 21 between 9.First dynamic balancing
Disk 10, the edge of the dynamic balancing disk 12 of center disk 11 and second are arranged with energy in some uneven holes 14, uneven hole 14
The uneven bolt 15 of different weight is enough fixed, the application of amount of unbalance is realized.
The cross sectional shape of asymmetric shaft 21 is designed as three kinds of forms, respectively rectangle, remove circle hat incompleteness it is circular and
Ellipse.During processing, some groups of the differently curved asymmetric stiffness section of different cross section form need to be processed, to pass through
Control variate method studies the asymmetric degree of bending stiffness and different cross section form is shaken 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, the and of nonlinear spring 23
Adjust rotating disk 24.Bearing spider 13 includes vertical provided with three risers being parallel to each other, respectively two on bottom 130, bottom plate 130
Starting stave 131, the 3rd riser 133 and the second riser 132 positioned at centre of side.The top of second riser 132 is provided with support
The bearing of asymmetric shaft 21；The top of the riser 133 of starting stave 131 and the 3rd is provided with screwed hole, and regulation rotating disk 24 is fixedly connected
Bolt arrangement 22, the screwed hole threaded connection corresponding with starting stave 131, the 3rd riser 133 of bolt arrangement 22, bolt arrangement
One end of 22 anterior connected nonlinearity spring 23, the other end of nonlinear spring 23 is supported on bearing 90.Adjusted by rotating
The precession depth of the section regulating bolt structure 22 of rotating disk 24 realizes continuously adjusting for the asymmetric degree of bearing rigidity, 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 stiffnesses.
Test device includes the first acceleration transducer 1, displacement transducer 2, tachometer of measuring 3, the second acceleration sensing
Device 4, data acquisition unit 5 and computer 6.First acceleration transducer 1, displacement transducer 2, tachometer of measuring 3 and second accelerate
Degree sensor 4 is installed on the side of asymmetric shaft 21, acceleration, vibration displacement and rotating speed for monitoring asymmetric shaft 21；First
Acceleration transducer 1, displacement transducer 2, the signal of the acceleration transducer 4 of tachometer of measuring 3 and second collection are adopted by data
Storage 5 is transferred to computer 6.After rotor operation, sensor gathers the vibration signal of double, asymmetrical bearing rotor system, will believe
Number carry out data conversion after, be input in data acquisition unit 5, be further processed, analyze and show.
Protection device includes plastic contact piece 16, brake apparatus 17 and bulletproof glass cover 25.Brake apparatus 17, which is arranged in, to be turned
In the middle of sub, it is connected with buncher 8, plastic contact piece 16, plastic contact is installed below the cantilever brake(-holder) block of brake apparatus 17
Piece 16 is located at the top of asymmetric shaft 21；When the vibratory output of rotor-support-foundation system is more than limit value, asymmetric shaft 21 touches plasticity and connect
Contact 16, triggers brake apparatus 17, and brake apparatus 17 delivers a signal to buncher 8, and buncher 8 stops operating so that turn
Sub steady stopping.In addition, the generation to prevent the emergency situation caused by rotor unstability and brake apparatus 17 fail, all experiments
Part is protected with bulletproof glass cover 25, while being also convenient for the observation to experiment.The effect of brake apparatus 17 is to provide
A kind of method for judging rotor unstability, when brake apparatus is triggered, rotating speed now can be labeled as instability speed.In addition,
The bottom of brake apparatus is plastic contact piece 16, to prevent the bottom connection of rotating shaft and brake apparatus after bearing unstability when touching to turning
Sub- body causes damage, in addition, brake apparatus may be arranged as keeping contact not stop, being turned with studying double, asymmetrical bearing
The rub impact phenomena of subsystem.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the present invention should be all considered as belonging to by institute
The scope of patent protection that claims of submission are determined.
Claims (9)
1. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics, it is characterised in that including dual non-
Symmetrical feature generation device；
Double, asymmetrical feature generation device includes mounting plate (7), buncher (8) and two asymmetric bearing generation devices
(9)；Buncher (8) and two asymmetric bearing generation devices (9) are fixedly mounted on mounting plate (7)；
The output shaft of buncher (8) connects asymmetric shaft (21) by flexible clutch (18), and asymmetric shaft (21) is supported on
In the bearing of two asymmetric bearing generation devices (9)；Asymmetric shaft (21) between two asymmetric bearing generation devices (9)
On some balancing frames are installed.
2. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
Be characterised by, asymmetric bearing generation device (9) include bearing spider (13), bolt arrangement (22), nonlinear spring (23) and
Adjust rotating disk (24)；It is vertical provided with three risers being parallel to each other on bottom plate (130), bottom plate (130) that bearing spider (13) includes,
The respectively starting stave (131) of both sides, the 3rd riser (133) and positioned at middle the second riser (132)；Second riser
(132) bearing of the top provided with support asymmetric shaft (21)；The top of starting stave and the 3rd riser is provided with screwed hole, regulation
Rotating disk (24) is fixedly connected with bolt arrangement (22), and bolt arrangement (22) is corresponding with starting stave (131), the 3rd riser (133)
Screwed hole threaded connection, one end of the anterior connected nonlinearity spring (23) of bolt arrangement (22), nonlinear spring (23)
The other end is supported on bearing (90).
3. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 2, its
It is characterised by, bolt arrangement (22) and nonlinear spring (23) are horizontally disposed.
4. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
It is characterised by, mounting plate (7) is list structure, the mounting plate is provided with some longitudinal dovetail grooves；Buncher (8) and
Two asymmetric bearing generation devices (9) are fixed on mounting plate by dovetail groove.
5. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
It is characterised by, some balancing frames include the first dynamic balancing disk (10), center disk (11) and the second dynamic balancing disk be arrangeding in parallel
(12)；The edge of first dynamic balancing disk (10), center disk (11) and the second dynamic balancing disk (12) is arranged with some injustice
Weigh hole (14), the uneven bolt (15) of different weight can be fixed in uneven hole (14), the application of amount of unbalance is realized.
6. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
It is characterised by, the cross sectional shape of asymmetric shaft (21) is rectangle, removes the incompleteness circle or ellipse of circle hat.
7. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
It is characterised by, in addition to measurement apparatus；Measurement apparatus includes being arranged at the first acceleration transducer of asymmetric shaft (21) side
(1), displacement transducer (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) collection is transferred to by data acquisition unit (5)
Computer (6).
8. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 1, its
It is characterised by, in addition to protection device；Protection device includes brake apparatus (17)；Brake apparatus (17) is braked provided with cantilever
Plastic contact piece (16) is installed, plastic contact piece (16) is located above asymmetric shaft (21) below piece, cantilever brake(-holder) block；Braking
Device (17) connection buncher (8)；When the vibratory output of rotor-support-foundation system is more than limit value, asymmetric shaft (21) touches plasticity
Contact chip (16), triggering brake apparatus (17), brake apparatus (17) delivers a signal to buncher (8), and buncher (8) stops
Rotate so that rotor steadily stops.
9. a kind of test system of double, asymmetrical bearing rotor system vibration characteristics according to claim 8, its
It is characterised by, double, asymmetrical feature generation device and protection device are arranged in a bulletproof glass cover (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN107132048A true CN107132048A (en) | 2017-09-05 |
| CN107132048B CN107132048B (en) | 2019-05-24 |
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| CN201710495914.3A Active 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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Cited By (6)
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| CN108716975A (en) * | 2018-07-18 | 2018-10-30 | 浙江理工大学 | Use the damping experiment platform and method of the variable element rotor of piezoelectric actuator |
| EP3839468A1 (en) * | 2019-12-20 | 2021-06-23 | Robert Bosch S.p.A. | Method for balancing a rotor |
| EP3839469A1 (en) * | 2019-12-20 | 2021-06-23 | Robert Bosch S.p.A. | Rotor balancer |
| CN113092088A (en) * | 2021-03-26 | 2021-07-09 | 北京航空航天大学 | Vertical rotor tester with adjustable asymmetric degree of supporting rigidity |
| CN113432816A (en) * | 2021-06-11 | 2021-09-24 | 中北大学 | Method for testing and controlling unevenness of coupling rigidity of aircraft engine 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN113092088A (en) * | 2021-03-26 | 2021-07-09 | 北京航空航天大学 | Vertical rotor tester with adjustable asymmetric degree of supporting rigidity |
| 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 |
| CN113432816A (en) * | 2021-06-11 | 2021-09-24 | 中北大学 | Method for testing and controlling unevenness of coupling rigidity of aircraft engine rotor |
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