CN108716975A - Use the damping experiment platform and method of the variable element rotor of piezoelectric actuator - Google Patents
Use the damping experiment platform and method of the variable element rotor of piezoelectric actuator Download PDFInfo
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- CN108716975A CN108716975A CN201810788892.4A CN201810788892A CN108716975A CN 108716975 A CN108716975 A CN 108716975A CN 201810788892 A CN201810788892 A CN 201810788892A CN 108716975 A CN108716975 A CN 108716975A
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- main shaft
- annular seal
- cartridge housing
- bearing
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
Abstract
The present invention uses the damping experiment platform of the variable element rotor of piezoelectric actuator, including experimental bench agent set；Experimental bench agent set includes main shaft, is arranged with the cartridge housing of at least two disks, the cartridge housing of active bearings and passive bearing on main shaft, and there are one annular seals for setting between each adjacent two disk；Circular hole is provided on disk.The present invention also provides a kind of damping experiment method of the variable element rotor using piezoelectric actuator, the unbalance mass, of different stage and different location is inserted into disk so that it is convenient to carry out the analysis in the case of different role power.
Description
Technical field
The present invention relates to a kind of vibration-testing control devices of variable element rotor, and in particular to a kind of to use Piezoelectric Driving
Device is related to the vibration experiment table and method of the rotor control effect analysis under different supports, belongs to the technology of vibration characteristics prediction
Field.
Background technology
Currently, rotor-support-foundation system is widely used in mechanical industry.Mechanic Rotor System is by actuating unit, rotating mechanism, axis
It holds and the compositions such as its bearing, such as gas compressor, generator, steam turbine, centrifuge, motor.
The operative body of common rotating machinery all uses rotor-support-foundation system.Rotor-support-foundation system rotating speed is high, complicated, in operating
Various oscillation phenomenons can occur, as caused by rotor unbalance quality forced vibration, due to shaft and disk mating surface
The shaft self-excited vibration of generations such as friction, rotating shaft material internal resistance and Oil-film Force etc..
The vibration that rotor-support-foundation system generates when running is easy to influence the safety and stability of unit operation, causes parts
Damage, influences unit durability.The noise generated when operation can cause the noise pollution of working environment and living environment, influence people
Physical and mental health.With the rapid development of modern industry and society, safety that people run rotor-support-foundation system, stability
And work, the requirement of living environment of related personnel are also higher and higher.Therefore, the vibration and noise reducing of rotor-support-foundation system is analyzed and is ground
Study carefully, is of great significance to realizing rotor-support-foundation system safe and stable operation and improving working environment.
With the deep and actual needs of engineering of rotor-support-foundation system research, the research about rotor dynamics is at the end of the 20th century
There is very important effect in current rotor-support-foundation system field.Rotor dynamics research is gradually being expanded and perfect.It closes
By multidigit expert in the world, focus of attention and more papers have been delivered in the theoretical research of rotor dynamics, have play the science
The key player of research.
Since nonlinear vibration of rotor systems situation is extremely complex, and research for only relying on theory deduction convincingness itself
It is limited, thus rotor dynamic theory combined with related experiment it is necessary to, studied by vibration experiment proof theory correct
Property and feasibility.In order to make the achievement in research of rotor dynamic theory preferably be proven, and find the correlation of rotor oscillation
The design research and development of rule and new oscillation phenomenon, experimental provision seem of crucial importance.However, present experimental bench office on the market
Be limited to structure type fix, size it is single, affect the diversity of experimental study.
Therefore, it is necessary to be improved to the prior art.
Invention content
Piezoelectric actuator is used the technical problem to be solved in the present invention is to provide a kind of, can be in different supports, difference circle
Damping experiment platform and the side of the variable element rotor using piezoelectric actuator of vibration analysis are carried out in the case of disk quality to rotor
Method.
The present invention provides a kind of damping experiment platform of the variable element rotor using piezoelectric actuator, it is characterised in that：Including
Experimental bench agent set；
The experimental bench agent set includes main shaft, be arranged on main shaft at least two disks, active bearings cartridge housing
With the cartridge housing of passive bearing, there are one annular seals for setting between each adjacent two disk；
It is provided with circular hole on the disk.
As the improvement to the present invention using the damping experiment platform of the variable element rotor of piezoelectric actuator：
The disk includes disk one, disk two, disk three and disk four, and the non-contact displacement transducer includes non-
Tangent displacement sensor one, non-contact displacement transducer two and non-contact displacement transducer three；
The main shaft is from the bottom to top arranged with safety bearing one, disk one, annular seal three, active bearings successively
Cartridge housing, disk two, annular seal two, disk three, annular seal one, the cartridge housing of passive bearing, disk four,
Safety bearing two, thrust bearing and hot-wire coil；
The annular seal one, annular seal two and annular seal three, active bearings cartridge housing and
The cartridge housing of passive bearing is fixed on pedestal；
The main shaft bottom is connect by being sliced shaft coupling with motor.
As being further improved for the damping experiment platform to the variable element rotor of the invention using piezoelectric actuator：
It further include circulating pipe system；
The annular seal one, annular seal two and annular seal three are both provided with interconnected ring
Shape sealing, inlet and outlet, the main shaft pass through ring packing；
The water circulation system includes water tank, valve, filter, centrifugal pump, steady-flow tank, electromagnetic flowmeter, valve and valve
Door；Outlet, valve, filter, centrifugal pump, steady-flow tank and the electromagnetic flowmeter of the water tank are sequentially connected rear and ring packing
The water inlet of device connects, successively after all annular seals, water outlet successively after valve and valve with water tank
Import connection.
As being further improved for the damping experiment platform to the variable element rotor of the invention using piezoelectric actuator：
The disk one, disk two, disk three and disk four are set in by conical sleeve on main shaft respectively；
The disk one, disk two, disk three and disk four are provided centrally with disc hole, and main shaft passes through disc hole, main
The diameter of axis is less than the diameter of disc hole；
The gap that the conical sleeve shaft core position is provided with, main shaft pass through gap；The conical sleeve diameter is small
One end stretch into the gap of disc hole and main shaft, the big one end of conical sleeve diameter be provided be inserted into for joint bolt it is logical
Hole and screw hole.
As being further improved for the damping experiment platform to the variable element rotor of the invention using piezoelectric actuator：
The center of the cartridge housing of the active bearings and the cartridge housing of passive bearing is both provided with autoregistration ball bearing, institute
State main shaft pass through autoregistration ball bearing, autoregistration ball bearing respectively with two high-voltage piezoelectric drivers and two elastomers
Spring connects.
As being further improved for the damping experiment platform to the variable element rotor of the invention using piezoelectric actuator：
The anode of the hot-wire coil is coupled by the anode with power supply after resistance box, the cathode of power supply and the cathode of power supply
Connection.
The present invention also provides a kind of damping experiment methods of the variable element rotor using piezoelectric actuator, including following step
Suddenly：
1), adjust safety bearing one and safety bearing two on main shaft to neutrality, main shaft sequentially passes through peace from top to bottom
Holoaxial holds two, disk four, disk three, disk two, disk one and safety bearing one, and each disk bottom is arranging two just
The non-contact displacement transducer of friendship；Motor is opened, waits for that rotor rotation tends towards stability, non-contact displacement transducer registration wave
After moving steadily, host computer receives and analyzes the signal that each non-contact displacement transducer obtains；The rotating speed of main shaft is recorded, respectively
The radial and axial vibration displacement of a disk；
2), the bearing shell of the cartridge housing of active bearings and passive bearing is located on main shaft, main shaft is from top to bottom successively
Across safety bearing two, disk four, the cartridge housing of passive bearing, disk three, disk two, the cartridge housing of active bearings, disk one
With safety bearing one；Motor is opened, rotating speed is adjusted to particular value, adjusts the cartridge housing of active bearings and the bearing of passive bearing
The operating voltage of shell mesohigh piezoelectric actuator, to which the vibration of main shaft be adjusted；Wait for that rotor rotation tends towards stability, it is non-
After tangent displacement sensor registration smooth fluctuations, data are recorded；Record the rotating speed of main shaft, the work of high-voltage piezoelectric driver
Voltage, the radial and axial vibration displacement of each disk；
3), annular seal one, annular seal two and annular seal three are set on main shaft, main shaft from
Under to above sequentially pass through safety bearing two, disk four, the cartridge housing of passive bearing, annular seal one, disk three, annular
Sealing device two, disk two, the cartridge housing of active bearings, annular seal three, disk one and safety bearing one；Connect water
The circulatory system opens valve, valve and valve, water is allowed to flow through water tank, valve, filter, centrifugal pump, steady-flow tank, Electromagnetic Flow
Meter, annular seal three, annular seal two, annular seal one, valve and valve, eventually pass back in water tank into
Row cycle；It waits for that rotor rotation tends towards stability, after non-contact displacement transducer registration smooth fluctuations, records the rotating speed of main shaft, electricity
The registration of magnetic flowmeter, the radial and axial vibration displacement of each disk；
4), based on step 1, hot-wire coil is placed in main shaft top, anode and the resistance box of hot-wire coil join
It connects, resistance box couples with the anode of power supply, and the cathode of power supply couples with the cathode of coil, opens power supply, the resistance of regulation resistance case
Value records vibration data after stablizing, then, resistance box is coupled with the cathode of power supply, and the anode of power supply joins with the cathode of coil
It connects, sense of current is converted with this, then change the resistance value of resistance box, wait for that rotor rotation tends towards stability, contactless displacement
After sensor registration smooth fluctuations, record the rotating speed of main shaft, the resistance value of resistance box, sense of current, each disk it is radial and
Axial vibration displacement；
5) quantity and the position for, changing disk, the unbalance mass, of different stage and different location is inserted into disk,
Steps performed 1-4 is repeated, contrast experiment is.
The present invention is using the damping experiment platform of the variable element rotor of piezoelectric actuator and the technical advantage of method：
1. the present invention is provided with two safety bearings, deviated to avoid the related greater trochanter with plastic deformation, it also can be effective
Resonance causes structure to be destroyed when preventing rotor from passing through critical speed.
2. the unbalance mass, of different stage and different location is inserted into disk so that it is convenient to carry out different role
Analysis in the case of power.Disk and main shaft are coupled by a kind of conical sleeve, disk can according to the demand of vibration experiment from
By adjusting the position on main shaft.Disk can be replaced, and conical sleeve is unclamped, and slice shaft coupling is after main shaft unloads, just
Axis can be extracted out from the other end, then replace disk, then main shaft is inserted into, by conical sleeve by disk and main shaft into
Row is fixed, and disk number can change, and four disks generally can be inserted.
3. the active bearings of the present invention and the cartridge housing of passive bearing are with two high-voltage piezoelectric drivers and two elastomers
Spring is arranged in center.Piezoelectric ceramic actuator is to utilize piezoelectric effect, and electric signal is changed into displacement signal output.Pass through
This device can preferably control the vibration deformation of rotor-support-foundation system.
4. the present invention is provided with ring packing between disk, the vibration displacement of lower rotor part can be supported to carry out to dry and wet binary states
Contrast experiment analyzes, to detect effectiveness in vibration suppression.
5. the present invention is provided with a hot-wire coil on main shaft top, coil is connect with resistance box and power supply.Pass through change
The resistance value of resistance box changes the mode of connection with power positive cathode, can test different size, the electromagnetic force of different directions
Influence situation to rotor oscillation.
Description of the drawings
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is structural schematic diagram of the present invention using the experimental bench agent set of the variable element rotor of piezoelectric actuator；
Fig. 1 .1 are the side view of experimental bench agent set；Fig. 1 .2 are the stereogram of experimental bench agent set；
Fig. 2 is the structural schematic diagram of safety bearing 1 in Fig. 1；
Fig. 3 is the structural schematic diagram of disk in Fig. 1；
Fig. 4 is the structural schematic diagram of conical sleeve 21 in Fig. 1；
Fig. 4 .1 are the side view of conical sleeve 21；Fig. 4 .2 are the stereogram of conical sleeve 21；
Fig. 5 is the cartridge housing 11 of active bearings and 12 structural schematic diagram of cartridge housing of passive bearing in Fig. 1；
Fig. 5 .1 are the side view of the cartridge housing 11 of active bearings and the cartridge housing 12 of passive bearing；Fig. 5 .2 are active bearings
Cartridge housing 11 and passive bearing cartridge housing 12 stereogram；
Fig. 6 is the structural schematic diagram of annular seal in Fig. 1；
Fig. 7 is that experimental bench and water circulation system in Fig. 1 couples schematic diagram；
Fig. 8 is the connection schematic diagram of the experimental bench top coil circuit system in Fig. 1.
Specific implementation mode
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This.
Embodiment 1, using piezoelectric actuator variable element rotor damping experiment platform, as shown in figures 1-8, including experimental bench
Agent set and circulating pipe system.
Because horizontal type structure design makes rotor oscillation response be affected by gravity, it is possible to create influence the attached critical of experimental study
Phenomenon, so the experimental bench agent set of the present invention uses vertical structure.
It is (built-in with the safety bearing 1 that is sequentially sleeved at from the bottom to top on main shaft 4 that experimental bench agent set includes main shaft 4
Sliding bearing), disk 1 (bottom install non-contact displacement transducer 1), annular seal 3 15, active bearings
Cartridge housing 11 (built-in autoregistration ball bearing 27), disk 28 (bottom install non-contact displacement transducer 2 18), ring
It is shape sealing device 2 14, disk 39 (bottom install non-contact displacement transducer 3 19), annular seal 1, passive
Cartridge housing 12 (built-in autoregistration ball bearing 27), the disk 4 10 of bearing (install non-contact displacement transducer four in bottom
20), safety bearing 26 (built-in sliding bearing), thrust bearing 16 and hot-wire coil 22.For easy for installation and the operation is stable,
Motor 2, safety bearing 1, safety bearing 26, annular seal (annular seal 1, annular seal 2 14
With annular seal 3 15), the cartridge housing 12 of the cartridge housing of active bearings 11 and passive bearing passes through bolt installation and fixes
On pedestal 1, main shaft 4 is only across these components, these components are not with 4 common rotation of main shaft.Other component all passes through radial direction
Clamping device is mounted on main shaft 4, with 4 common rotation of main shaft.
2 flanged joint of motor of 4 bottom 250W of main shaft, 2 maximum operational speed of motor are 10800r/min.To drop as far as possible
It is influenced caused by vibration deformation is system in low rotor operational process, using slice shaft coupling 3 between shaft 4 and motor 2
It connects.Axial, lateral and angular misalignment between motor 2 and experiment rotor are compensated by slice 3 element of shaft coupling, this is a kind of
Single part narrow slit structure can provide high torsion stiffness under low quality and the moment of inertia.
Experimental bench agent set is provided with safety bearing 1 and safety bearing 26, safety bearing 1 and peace on main shaft 4
Holoaxial holds 26 both ends for being symmetricly set on main shaft 4, deflects, is also prevented from by facing to avoid the related greater trochanter with plastic deformation
Resonance causes to destroy when boundary's rotating speed, improves the safety of experiment.Radial load generates vibration experiment result dry in order to prevent
It disturbs, influences the stability of experimental result, the present invention is also being provided with thrust bearing 16 close to the position at 4 top of main shaft.
The disk (disk 1, disk 28, disk 39 and disk 4 10) that experimental bench agent set uses has around axle center
(main shaft 4 passes through the axle center of disk, disk to be disposed with three circle circular holes 61 from axle center to edge, often enclose circular hole to 6 circular holes 61
61 include six circular holes 61 being circumferentially uniformly arranged along the axle center of disk), 3D structural schematic diagrams are shown in Fig. 3.Different stage and
In the case of the unbalance mass, of different location is inserted into the circular hole 61 of disk so that it is convenient to carry out different role power
Analysis.(non-contact displacement transducer includes non-connects to the non-contact displacement transducer of disk bottom two quadrature arrangements of installation
Touch displacement sensor 1, non-contact displacement transducer 2 18, non-contact displacement transducer 3 19 and contactless position
20), when experiment, can measure the radial and axial vibration displacement of disk to displacement sensor 4.Quadrature arrangement is two contactless
Displacement sensor, one straight up direction arrange, horizontal direction arrangement, two non-contact displacement transducer angles
It is 90 degree, measures the radial and axial vibration displacement of disk respectively.Disk and main shaft 4 are connected by conical sleeve 21, disk
The position on main shaft 4 can be freely adjusted according to the demand of vibration experiment.Disk can be replaced, by 21 pine of conical sleeve
Open, will slice shaft coupling 3 after main shaft 4 unloads, so that it may main shaft 4 to be drawn upwardly out, then replace disk, then by 4 weight of main shaft
It is new to be inserted into, disk and main shaft 4 are fixed again by conical sleeve 21, disk number can change, generally can be
Four disks (disk 1, disk 28, disk 39 and disk 4 10) are arranged on main shaft 4.
The 2D structural schematic diagrams of conical sleeve 21 are as shown in Fig. 4 .1,3D schematic diagrames such as Fig. 4 .2.Conical sleeve 21
Shaft core position is provided with the gap 22 of perforation conical sleeve 21, and main shaft 4 passes through gap 22.21 diameter of conical sleeve is big
One end is provided with through-hole 25 and screw hole 26, and through-hole 25 is used to couple with disk, screw hole 26 for dismantle conical sleeve 21 with
Connection between disk (screw is inserted into through-hole 25 and screw hole 26).Joint bolt and knockout screw are same screw in through-hole 25,
It is used when the two difference.Disk and main shaft are inserted into the axle center trepanning (disc hole) of disk, the small one end of 21 diameter of conical sleeve
4 gap (diameter of disc hole is slightly larger than the diameter of main shaft 4).When joint bolt is tightened, due to circular cone ramp pressure, compel
So that conical sleeve 21 is deformed in circumferencial direction, to be pressed on axis 4, is filled with the gap 22 of script, ensures disk
It is turned round together with main shaft 4.When converting disk position on main shaft 4, joint bolt 23 is unclamped, in the spiral shell of conical sleeve 211
It is screwed into knockout screw in hole 26, you can so that conical sleeve 21 is generated axial relative movement with disk, conical sleeve 21 leans on bullet
Property restoring force automatically with main shaft 4 unclamp.When joint bolt insertion through-hole 25 is tightened, due to circular cone ramp pressure, cone is forced
Sleeve 21 deforms in circumferencial direction, to be pressed on main shaft 4；Joint bolt unloads, and conical sleeve 21 is extensive by elasticity
Multiple power is unclamped with main shaft 4 automatically, and then screw hole 26 is inserted into knockout screw, realizes the axial movement of conical sleeve, this device ginseng
Existing experimental bench is examined to obtain.The internal diameter of conical sleeve 211 is bigger than 4 outer diameter of main shaft, and the two difference substantially+0.06~+
0.02mm can also determine empty size according to 4 diameter of axle size of actual main shaft.Size (such as bolt length, disk size
Deng) voluntarily determine.Conical sleeve 21 is fabricated using No. 45 steel.
The cartridge housing 11 of active bearings and the cartridge housing 12 of passive bearing, which all employ piezoelectric ceramic actuator, to be come to vibration
Displacement is accurately controlled, and the as cartridge housing 11 of active bearings and the cartridge housing 12 of passive bearing has used piezoelectricity pottery
The similar operation principle of porcelain driver adjusts deformation quantity by the change of voltage magnitude.Piezoelectric ceramic actuator is to utilize piezoelectricity
Electric signal is changed into displacement signal output by effect.The maximum characteristic of piezoelectric ceramics is including the positive piezoelectricity with piezoelectricity
And inverse piezoelectricity.When adding external electric field to the dielectric with piezoelectricity, positive and negative charge center occurs opposite inside dielectric
Displacement and be polarized, thus displacement causes dielectric to deform upon, and this effect is referred to as inverse piezoelectricity.Piezoelectric ceramics is in electricity
The deformation quantity very little generated under field action, no more than thousand a ten thousandths of size itself, because of this small variation, base
Mechanism is accurately controlled in what this principle was manufactured -- piezoelectric actuator, it is very suitable for the control of precision instrument and machinery
With.
The cartridge housing 11 of the active bearings of experimental bench agent set and the cartridge housing 12 of passive bearing all employ high pressure pressure
Electric drive 30 accurately controls vibration displacement amount.The cartridge housing 11 of active bearings and the cartridge housing 12 of passive bearing
Center (axle center) be provided with autoregistration ball bearing 27, to ensure up to 1.5 degree of free angular movement.Two
High-voltage piezoelectric driver 30 and two elastomeric springs 28 are connect with autoregistration ball bearing 27, and main shaft 4 is rolled across autoregistration
Pearl bearing 27.When being exposed to excessive machinery, electrically or thermally stress, these high-voltage piezoelectric drivers 30 can be by unrepairable
Damage and depolarising.Relative to high compressing force, high-voltage piezoelectric driver can be caused when being exposed to tension and shear-type load quickly
30 damages.Therefore, high-voltage piezoelectric driver 30 can only operate under compressive force, and elastomeric spring 28 preloads height for mechanicalness
Press piezoelectric actuator 30.The operating voltage of high-voltage piezoelectric driver 30 is carried between 0~1000v by two power amplifiers
For permission electric current is 6100mA.Given one 500 volts of offset can be come using 500 volts of maximum voltage amplitude
Driving force positively and negatively is provided.Maximum drive device strain under being arranged herein is 30 millimeters of each direction.
The present invention sets one between each adjacent two disk (disk 1, disk 28, disk 39 and disk 4 10)
Annular seal (annular seal 1, annular seal 2 14 and annular seal 3 15), can be to dry and wet two
State supports the vibration displacement of lower rotor part to carry out contrast experiment's analysis, to detect effectiveness in vibration suppression.Fig. 6 .1 are that ring packing fills in Fig. 1
The 2D structural schematic diagrams set, Fig. 6 .2 are the corresponding 3D schematic diagrames of annular seal.As shown in Fig. 6 .1, each ring packing
Device has interconnected ring packing 32, water inlet 33 and water outlet 34, water inlet 33 and water outlet 34 to be arranged in annular
Sealing device both ends, the setting of ring packing 32 water inlet 33 and water outlet 34 between the two, main shaft 4 passes through ring packing 32.
Water in water route is flowed into from the water inlet 33 of one of annular seal, again from water outlet after main shaft 4
34 exit into the water inlet 33 of another annular seal, followed by all annular seals, finally from annular
The water outlet 34 of sealing device flows out.Annular seal is made of stainless steel, and is largely solid, small portion only above
It is hollow to divide.Hollow part can be opened from centre, form ring packing 32, convenient for placing and replacing annular seal,
Main shaft 4 passes through ring packing 32.Once accessing circulation waterway, ring packing 32, which must remain off, to be prevented from revealing.Annular
Sealing increases a support similar to the effect of bearing 4 to main shaft 4.The size of flow of inlet water, to change ring packing 32 into
Pressure difference is exported, and then changes the stiffness and damping coefficient of ring packing 32, influences the support effect of ring packing 32.
The present invention is provided with a hot-wire coil 22 on 4 top of main shaft.As shown in figure 8, the anode 43 of hot-wire coil 22 is logical
Couple with the anode 47 of power supply 46 after crossing resistance box 45, the cathode 48 of power supply 46 couples with the cathode 44 of power supply 46.Experimentation
The resistance value of middle regulation resistance case 45 changes the size of the electromagnetic force of generation, by change access the positive and negative anodes of power supply 46 come
Change the direction of electromagnetic force.
As shown in fig. 7, water circulation system includes water tank 35, valve 36, filter 37, centrifugal pump 38, steady-flow tank 39, electromagnetism
Flowmeter 40, valve 41, valve 42.Water tank 35, valve 36, filter 37, centrifugal pump 38, steady-flow tank 39 and electromagnetic flowmeter
40 be sequentially connected it is rear connect with the water inlet 33 of one of annular seal, after flowing through all annular seals, most
The water outlet 34 of annular seal afterwards is connect after valve 41 and valve 42 with water tank 35 successively.Valve opening door 36, water tank
Water in 35 is flowed to by outlet in filter 37, and impurity is filtered, and is then taken out the water in filter 37 by centrifugal pump 38
Go out, centrifugal pump 38 generates pressure fluctuation at work in order to prevent, influences measurement accuracy, therefore the present invention is in centrifugal pump 38 and electricity
Install a steady-flow tank 39 between magnetic flowmeter 40 additional, the piping connection annular seal finally come out from electromagnetic flowmeter 40
3 15 water inlet, water flow out after flowing through three annular seals from the water outlet of one of annular seal 1,
It is returned in water tank 35 after valve 41 and valve 42.
The work step of the present invention is as follows：
1. each device of the present invention is assembled, adjust safety bearing 1 and safety bearing 26 on main shaft 4 in
Property, main shaft 4 sequentially passes through safety bearing 26, disk 4 10, disk 39, disk 28, disk 1 and safe axis from top to bottom
1 are held, four disks (disk 1, disk 28, disk 39 and disk 4 10) are located at the respectively specified position on main shaft 4
It sets, four disks are fixed on by conical sleeve 21 on main shaft 4, and 4 bottom of main shaft is connected by being sliced shaft coupling 3 with motor 2
It connects.Each disk bottom arrange two orthogonal non-contact displacement transducers (non-contact displacement transducer 1,
Non-contact displacement transducer 2 18 and non-contact displacement transducer 3 are 19).Opening motor 2, adjusting rotating speed to particular value,
Wait for that rotor rotation tends towards stability, after non-contact displacement transducer registration smooth fluctuations, host computer receives and analyzes each non-connect
The signal that touch displacement sensor obtains converts the electric signal of measurement to number by FFT transform (Fast Fourier Transform (FFT))
According to as vibration suppression characteristic, and being recorded.In the step, the data recorded is needed to have：The rotating speed of main shaft 4, it is each
The radial and axial vibration displacement of disk.
2. on the basis of step 1, conical sleeve 21 is unclamped, slice shaft coupling 3 is after main shaft 4 unloads, so that it may with
Main shaft 4 is drawn upwardly out, this moment, the cartridge housing 11 of the active bearings of piezoelectric actuator and the cartridge housing of passive bearing will be used
12 are fixed on by bolt on pedestal 1, then main shaft 4 is inserted into, main shaft 4 sequentially pass through from top to bottom safety bearing 26,
Disk 4 10, the cartridge housing 12 of passive bearing, disk 39, disk 28, the cartridge housing 11 of active bearings, disk 1 and safety
Bearing 1 is fixed disk and main shaft 4 by conical sleeve 21 again, and the position of disk is kept and step 1 this moment
It is identical.Each numerical value that rotating speed to step 1 is recorded is adjusted, 11 He of cartridge housing of active bearings is adjusted by power amplifier
The operating voltage of the 12 mesohigh piezoelectric actuator 30 of cartridge housing of passive bearing is provided positively and negatively by power amplifier
Driving force.When the operating voltage of high-voltage piezoelectric driver 30 changes, because piezoelectric ceramics will produce very under electric field action
Small deformation quantity, this deformation quantity be changed with the change of voltage, can give the cartridge housing 11 and passive bearing of active bearings
The autoregistration ball bearing 27 of cartridge housing 12 provides small offset, and then influences the support effect of autoregistration ball bearing 27
The vibration of main shaft 4 is adjusted in fruit.Wait for that rotor rotation tends towards stability, non-contact displacement transducer registration smooth fluctuations
Afterwards, data are recorded again.In the step, the data recorded is needed to have：The rotating speed of main shaft 4, the work of high-voltage piezoelectric driver 30
Make voltage, the radial and axial vibration displacement of each disk.
3. the initial step for repeating 2, main shaft 4 is dismantled, and by the cartridge housing of active bearings 11 and passive bearing
Cartridge housing 12 also disassembles.This moment, by annular seal 1, annular seal 2 14 and annular seal 3 15
It is fixed on by bolt on the designated position of pedestal 1, then main shaft 4 is inserted into, main shaft 4 sequentially passes through safety from top to bottom
Bearing 26, disk 4 10, the cartridge housing 12 of passive bearing, annular seal 1, disk 39, annular seal two
14, disk 28, the cartridge housing 11 of active bearings, annular seal 3 15, disk 1 and safety bearing 1, pass through circular cone
Shape sleeve 21 is fixed disk and main shaft 4 again, and the position of disk is kept this moment and step 1 is identical.Connect water cyclic system
System, checks the leakproofness of each device, then by 35 topped up with water of water tank.Open valve 36,41,42, allow water flow through water tank 35,
Valve 36, filter 37, centrifugal pump 38, steady-flow tank 39, electromagnetic flowmeter 40, annular seal 3 15, annular seal
2 14, annular seal 1, valve 41, valve 42 eventually pass back to be recycled in water tank 35.It can adjust as needed
The valve 41 on pipeline is saved to control uninterrupted, changes the pressure difference at 32 both ends of ring packing with this.After the systems such as same are stablized
Record numerical value.In the step, the data recorded is needed to have：The rotating speed of main shaft 4, the registration of electromagnetic flowmeter 40, each disk
Radial and axial vibration displacement.
4. on the basis of step 1, hot-wire coil 22 is placed in 4 top of main shaft.The anode 43 of hot-wire coil 22 and electricity
It hinders case 45 to couple, resistance box 45 couples with the anode 47 of power supply 46, and the cathode 48 of power supply 46 couples with the cathode 44 of coil.It beats
Switch power supply 46, the resistance value of regulation resistance case 45 record vibration data after stablizing.Then, by the cathode of resistance box 45 and power supply 46
48 connections, the anode 47 of power supply 46 couple with the cathode 44 of coil, and sense of current is converted with this, then change resistance box 45
Resistance value continue to do one group of experiment.In the step, the data recorded is needed to have：The rotating speed of main shaft 4, the electricity of resistance box 45
Resistance value, sense of current, the radial and axial vibration displacement of each disk.
5. changing quantity and the position of disk by conical sleeve 21, by the uneven matter of different stage and different location
Amount is inserted into disk, is repeated steps performed 1-4, is contrast experiment.Shaking for each support can be further examined in this way
Dynamic inhibition.
After experiment, main experimental bench motor 2 is closed, closes centrifugal pump 38, valve 36, valve 41 and valve 42, is arranged
Experiment equipment arranges the data that experiment measures and is compared to the vibration suppressioning effect of each support.
Finally, it should also be noted that it is listed above be only the present invention several specific embodiments.Obviously, this hair
Bright to be not limited to above example, acceptable there are many deformations.Those skilled in the art can be from present disclosure
All deformations for directly exporting or associating, are considered as protection scope of the present invention.
Claims (7)
1. the damping experiment platform of the variable element rotor using piezoelectric actuator, it is characterised in that：Including experimental bench agent set；
The experimental bench agent set includes main shaft (4), be arranged on main shaft (4) at least two disks, active bearings bearing
The cartridge housing (12) of shell (11) and passive bearing, there are one annular seals for setting between each adjacent two disk；
Circular hole (61) is provided on the disk.
2. the damping experiment platform of the variable element rotor according to claim 1 using piezoelectric actuator, it is characterised in that：
The disk includes disk one (7), disk two (8), disk three (9) and disk four (10), the annular seal packet
Include annular seal one (13), annular seal two (14) and annular seal three (15)；
The main shaft (4) be arranged with successively from the bottom to top safety bearing one (5), disk one (7), annular seal three (15),
Cartridge housing (11), disk two (8), annular seal two (14), disk three (9), the annular seal one of active bearings
(13), the cartridge housing (12) of passive bearing, disk four (10), safety bearing two (6), thrust bearing (16) and hot-wire coil
(22)；
The annular seal one (13), annular seal two (14) and annular seal three (15), active bearings
The cartridge housing (12) of cartridge housing (11) and passive bearing is fixed on pedestal (1)；
It is provided with non-contact displacement transducer on the disk one (7), disk two (8), disk three (9) and disk four (10).
Main shaft (4) bottom is connect by being sliced shaft coupling (3) with motor (2).
3. the damping experiment platform of the variable element rotor according to claim 2 using piezoelectric actuator, it is characterised in that：
It further include circulating pipe system；
The annular seal one (13), annular seal two (14) and annular seal three (15) are both provided with mutually
Ring packing (32), water inlet (33) and the water outlet (34) of connection, the main shaft (4) pass through ring packing (32)；
The water circulation system includes water tank (35), valve (36), filter (37), centrifugal pump (38), steady-flow tank (39), electromagnetism
Flowmeter (40), valve (41) and valve (42)；The outlet of the water tank (35), valve (36), filter (37), centrifugal pump
(38), steady-flow tank (39) and electromagnetic flowmeter (40) are sequentially connected the water inlet with annular seal (33) afterwards and connect, successively
After all annular seals, water outlet (34) import after valve (41) and valve (42) with water tank (35) successively
Connection.
4. the damping experiment platform of the variable element rotor according to claim 3 using piezoelectric actuator, it is characterised in that：
The disk one (7), disk two (8), disk three (9) and disk four (10) are set in by conical sleeve (21) respectively
On main shaft (4)；
The disk one (7), disk two (8), disk three (9) and disk four (10) are provided centrally with disc hole, and main shaft (4) is worn
Disc hole is crossed, the diameter of main shaft (4) is less than the diameter of disc hole；
The gap (22) that conical sleeve (21) shaft core position is provided with, main shaft (4) pass through gap (22)；The cone
The gap of disc hole and main shaft (4), the big one end setting of conical sleeve (21) diameter are stretched into the small one end of sleeve (21) diameter
There are the through-hole (25) being inserted into for joint bolt and screw hole (26).
5. the damping experiment platform of the variable element rotor according to claim 4 using piezoelectric actuator, it is characterised in that：
The center of the cartridge housing (11) of the active bearings and the cartridge housing (12) of passive bearing is both provided with autoregistration ball axis
Hold (27), the main shaft (4) pass through autoregistration ball bearing (27), autoregistration ball bearing (27) respectively with two high-voltage piezoelectrics
Driver (30) and two elastomeric spring (28) connections.
6. the damping experiment platform of the variable element rotor according to claim 5 using piezoelectric actuator, it is characterised in that：
The anode (43) of the hot-wire coil (22) is coupled with the anode of power supply (46) (47) afterwards by resistance box (45), power supply
(46) cathode (48) couples with the cathode (44) of power supply (46).
7. the use pressure of the damping experiment platform using any variable element rotor using piezoelectric actuator of claim 3~6
The damping experiment method of the variable element rotor of electric drive, which is characterized in that include the following steps：
1), adjust safety bearing one (5) and safety bearing two (6) on main shaft (4) to neutrality, main shaft (4) from top to bottom according to
It is secondary to pass through safety bearing two (6), disk four (10), disk three (9), disk two (8), disk one (7) and safety bearing one (5),
Each disk bottom arranges two orthogonal non-contact displacement transducers；Motor (2) is opened, waits for that rotor rotation tends to be steady
Fixed, after non-contact displacement transducer registration smooth fluctuations, host computer receives and analyzes each non-contact displacement transducer to obtain
The signal arrived；Record the rotating speed of main shaft (4), the radial and axial vibration displacement of each disk；
2), the cartridge housing (12) of the cartridge housing of active bearings (11) and passive bearing is set on main shaft (4), main shaft (4) from
Under to cartridge housing (12), disk three (9), the disk two for above sequentially passing through safety bearing two (6), disk four (10), passive bearing
(8), cartridge housing (11), disk one (7) and the safety bearing one (5) of active bearings；Motor (2) is opened, active bearings are adjusted
The operating voltage of cartridge housing (12) the mesohigh piezoelectric actuator (30) of cartridge housing (11) and passive bearing, to main shaft (4)
Vibration be adjusted；It waits for that rotor rotation tends towards stability, after non-contact displacement transducer registration smooth fluctuations, records data；
Record the rotating speed of main shaft (4), the operating voltage of high-voltage piezoelectric driver (30), the radial and axial vibration displacement of each disk；
3) annular seal one (13), annular seal two (14) and annular seal three (15), are set in main shaft
(4) on, main shaft (4) sequentially pass through from top to bottom safety bearing two (6), disk four (10), passive bearing cartridge housing (12), ring
Shape sealing device one (13), disk three (9), annular seal two (14), disk two (8), active bearings cartridge housing (11),
Annular seal three (15), disk one (7) and safety bearing one (5)；Water circulation system is connected, valve (36), valve are opened
(41) and valve (42) water, is allowed to flow through water tank (35), valve (36), filter (37), centrifugal pump (38), steady-flow tank (39), electricity
Magnetic flowmeter (40), annular seal three (15), annular seal two (14), annular seal one (13), valve
(41) and valve (42) it, eventually passes back to be recycled in water tank (35)；Wait for that rotor rotation tends towards stability, contactless displacement sensing
After device registration smooth fluctuations, the rotating speed of record main shaft (4), the registration of electromagnetic flowmeter (40), each disk is radial and axial
Vibration displacement；
4), based on step 1, hot-wire coil (22) is placed in main shaft (4) top, the anode (43) of hot-wire coil (22)
Couple with resistance box (45), resistance box (45) couples with the anode (47) of power supply (46), the cathode (48) and coil of power supply (46)
Cathode (44) connection, open power supply (46), the resistance value of regulation resistance case (45), stablize after record vibration data, then, will be electric
Resistance case (45) couples with the cathode (48) of power supply (46), and the anode (47) of power supply (46) couples with the cathode (44) of coil, with this
Sense of current is converted, the resistance value of resistance box (45) is then changed, waits for that rotor rotation tends towards stability, contactless displacement sensing
After device registration smooth fluctuations, the rotating speed of record main shaft (4), the resistance value of resistance box (45), sense of current, each disk radial direction
With axial vibration displacement；
5) quantity and the position for, changing disk, the unbalance mass, of different stage and different location is inserted into disk, is repeated
Steps performed 1-4, is contrast experiment.
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