CN105675276B - A kind of elastic bearing squeeze film damper damping behavior experimental rig - Google Patents
A kind of elastic bearing squeeze film damper damping behavior experimental rig Download PDFInfo
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- CN105675276B CN105675276B CN201610020546.2A CN201610020546A CN105675276B CN 105675276 B CN105675276 B CN 105675276B CN 201610020546 A CN201610020546 A CN 201610020546A CN 105675276 B CN105675276 B CN 105675276B
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- 238000013016 damping Methods 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000001133 acceleration Effects 0.000 claims abstract description 19
- 230000004044 response Effects 0.000 claims abstract description 16
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 38
- 239000010687 lubricating oil Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 description 14
- 238000013461 design Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
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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
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Abstract
The present invention discloses a kind of elastic bearing squeeze film damper damping behavior experimental rig, and elastic bearing squeeze film damper damping behavior experimental rig includes mounting base, resilient support, squeeze film outer shroud, loaded ring, exciting simulation mechanism and control mechanism.Resilient support includes ontology and bearing block；Squeeze film outer shroud is fixed on mounting base and is set around the periphery of bearing block；One end of loaded ring is sheathed on the inside of bearing block, and loaded ring can be rotated relative to bearing block；Exciting simulation mechanism includes vibrator, exciting rod, force snesor and acceleration transducer.Wherein, under the action of vibrator, exciting rod applies exciting force to loaded ring, so that bearing block generates vibration, it can receive the exciting force signal that force snesor sends out and the vibration response signal that acceleration transducer is sent out to dynamic signal analyzer, and obtain the vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force.
Description
Technical field
This invention relates generally to elastic bearing squeeze film damper, in particular to aeroengine rotor
The damping behavior experiment of elastic bearing squeeze film damper.
Background technology
Elastic bearing squeeze film damper is had been widely used in Small Aeroengine rotor-bearing system.
In the course of work, it can effectively absorb rotor vibrational energy caused by unbalance residual content, be substantially reduced the vibration of rotor
Displacement and reduce bearing load, improve engine job stability and reliability and extend bearing working life.
Research to elastic bearing squeeze film damper damping behavior, it is domestic to be mainly partial to Analysis on Mechanism, conventional number
Learn the foundation and correlation theory derivation, algorithm research or improvement and some confirmatory experimental studies of mechanical model.In theory
In analysis, the Reynolds equation based on ideal viscous fluid basic assumption is generally employed at present as squeeze film damper power
The fundamental analysis theory of characteristic.In fact, the operation principle, operating condition and motion state equal ten due to squeeze film damper
Point complexity, therefore assume by Reynolds equation is related to some merely, it is difficult to comprehensively it is accurate with truly describe squeeze film and hinder
Buddhist nun's device possessed dynamic characteristics during the work time.On verification experimental verification, generally formed at present using rotor and damping support
Rotation test device implement the analysis of experiments to elastic bearing squeeze film damper dynamic characteristics.Due to testing process master
What is reflected is the comprehensive dynamic characteristic of " rotor-bearing system ", it is difficult to therefrom extract elastic bearing squeeze film damper sheet
The dynamic characteristics ingredient of body fully and targetedly investigate and analyze relatively.Therefore, result of the test has often been not enough to
Disclose the complicated characteristics of motion of elastic bearing squeeze film damping in effect ground, it is impossible to which elastic bearing squeeze film damper is changed
More targetedly instruction is provided into design.
In addition, the existing experimental rig for elastic bearing squeeze film damper, there are fluid during experiment
The problems such as splashing, oil film pressure is too small, experimental enviroment is very severe, can not only be stained test apparatus and equipment, can also be to experiment
The physical and mental health of personnel brings adverse effect.
At present, rarely has the report of the experimental rig for elastic bearing squeeze film damper, the experiment dress having been reported
It is complicated to install meter, operating difficulties.
Above- mentioned information is only used for strengthening the understanding of the background to the present invention, therefore it disclosed in the background technology part
It can include not forming the information to the prior art known to persons of ordinary skill in the art.
Invention content
A primary object of the present invention is to overcome at least one defect of the above-mentioned prior art, provides a kind of bullet
Property bearing squeeze film damper damping behavior experimental rig and method, design simple and effective, convenient for disassembly and assembly, reliable operation,
The vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force can be obtained.
For achieving the above object, the present invention adopts the following technical scheme that：
According to an aspect of the invention, there is provided a kind of elastic bearing squeeze film damper damping behavior experiment dress
It puts, including mounting base, resilient support, squeeze film outer shroud, loaded ring, exciting simulation mechanism and control mechanism.
Resilient support includes ontology and bearing block, and ontology is fixed in mounting base, and bearing block is fixedly connected simultaneously certainly with ontology
The side of ontology protrudes；Squeeze film outer shroud be fixed on mounting base and around bearing block periphery set, squeeze film outer shroud with
There are gap between bearing block, open up oil supplying hole on squeeze film outer shroud, connected with gap, lubricating oil can via oil supplying hole into
Enter in gap；One end of loaded ring is sheathed on the inside of bearing block, and loaded ring can be rotated relative to bearing block；Exciting analog machine
Structure includes vibrator, exciting rod, force snesor and acceleration transducer, and one end of exciting rod is connect with vibrator, exciting rod
The other end of the other end and loaded ring connects, and force snesor is fixed on exciting rod, and acceleration transducer is set to loaded ring
On the other end, acceleration transducer is located at exciting rod institute on straight line, and is oppositely arranged with exciting rod；Control mechanism includes dynamic
Signal analyzer.
Wherein, under the action of vibrator, exciting rod applies exciting force to loaded ring so that bearing block generates vibration, moves
State signal analyzer its can receive the exciting force signal that force snesor sends out and the vibratory response letter that acceleration transducer is sent out
Number, and obtain the vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force.
According to an aspect of the invention, there is provided a kind of elastic bearing squeeze film damper damping behavior experiment side
Method is carried out using above-mentioned elastic bearing squeeze film damper damping behavior experimental rig, included the following steps：
Exciting force is applied to loaded ring with vibrator so that bearing block generates vibration；
Exciting force is sensed by force snesor and is responded by acceleration transducer sense vibrations；And
What the exciting force signal and acceleration transducer sent out by dynamic signal analyzer reception force snesor was sent out shakes
Sound of something astir induction signal, and obtain the vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force.
As shown from the above technical solution, the advantages and positive effects of the present invention are：It is filled using experiment of the present invention
It puts, carries out the experiment of certain h type engine h elastic bearing squeeze film damper damping behavior, obtain the resistance of elastic bearing squeeze film
The related dynamic characteristics data such as Buddhist nun's device and elastic supporting rigidity, oil clearance, lubricating oil pressure, oil viscosity and start into
The percent value of elastic support shaft bearing outer wall amplitude and oil clearance when entering inelastic region, hinders elastic bearing squeeze film
Application of Buddhist nun's device in aero-engine development has important references value.Also, the present invention experimental rig design it is simple and effective,
Convenient for disassembly and assembly, reliable operation, can carry out more physical parameters of elastic bearing squeeze film damper influences to advise on its damping behavior
The experimental study of rule.
Description of the drawings
Consider following the following detailed description of the embodiment of the present invention in conjunction with the accompanying drawings, various targets of the invention,
Feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the present invention, is not necessarily drawn to scale.
In the accompanying drawings, same reference numeral always shows same or similar component.Wherein：
Fig. 1 is a kind of elastic bearing squeeze film damper damping behavior experiment according to an illustrative embodiments
System block diagram；
Fig. 2 is a kind of elastic bearing squeeze film damper damping behavior experiment according to an illustrative embodiments
The overall structure figure of device；
Fig. 3 is along the transverse sectional view of line A-A in Fig. 2；
Fig. 4 is along the transverse sectional view of line B-B in Fig. 2；And
Fig. 5 is the partial enlarged view in C lines in Fig. 3.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label represents same or similar structure, thus will omit their detailed description.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the following description, many details are provided to fully understand embodiments of the present invention so as to provide.However,
It will be appreciated by persons skilled in the art that technical scheme of the present invention can be put into practice without one in the specific detail or more
It is more or other methods, component, material etc. may be used.In other cases, be not shown in detail or describe known features,
Material or operation are to avoid fuzzy each aspect of the present invention.
As shown in Figures 1 to 5, the present invention provides a kind of elastic bearing squeeze film damper damping behavior experimental rig,
Including mounting base 10, resilient support 20, squeeze film outer shroud 30, loaded ring 40, exciting simulation mechanism and control mechanism.
Resilient support 20 includes ontology 21 and bearing block 22, and ontology 21 is fixed in mounting base 10, bearing block 22 and ontology
21 are fixedly connected and are protruded from the side of ontology 21.Squeeze film outer shroud 30 is fixed on mounting base 10 and around the outer of bearing block 22
There are gap between squeeze film outer shroud 30 and bearing block 22, oil supplying hole 31 is opened up on squeeze film outer shroud 30 for week setting, with
Gap connects, and lubricating oil can enter via oil supplying hole 31 in gap.One end of loaded ring 40 is sheathed on the inside of bearing block 22, adds
Carrying ring 40 can rotate relative to bearing block 22.Exciting simulation mechanism includes vibrator (not shown), exciting rod 51, force snesor
52 and acceleration transducer 53, one end of exciting rod 51 connect with vibrator, the other end of exciting rod 51 is another with loaded ring 40
One end connects, and force snesor 52 is fixed on exciting rod 51, and acceleration transducer 53 is set on the other end of loaded ring 40, is added
Velocity sensor 53 is located at 51 institute of exciting rod on straight line, and is oppositely arranged with exciting rod 51.Control mechanism includes Dynamic Signal
Analyzer.
Wherein, under the action of vibrator, exciting rod 51 applies exciting force to loaded ring 40 so that the generation of bearing block 21 is shaken
It is dynamic, dynamic signal analyzer its can receive exciting force signal that force snesor 52 sends out and what acceleration transducer 53 was sent out shakes
Sound of something astir induction signal, and obtain the vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force.
The elastic bearing squeeze film damper damping behavior experimental rig of the present invention is to install existing resilient support
In in mounting base, false bearings are simulated with loaded ring, vibrator generates the bearing block of sine excitation power excitation elastic bearing, so as to mould
Intend the load applied during rotor rotation to elastic bearing squeeze film damper.When the bearing block of elastic bearing generate it is circumferential into
When dynamic, typical squeeze film is formed between squeeze film outer shroud.Elastic bearing squeeze film is measured by acceleration transducer
Vibratory response of the damper under vibrator excitation.
Using experimental rig of the present invention, certain h type engine h elastic bearing squeeze film damper damping behavior is carried out
Experiment, obtains elastic bearing squeeze film damper and elastic supporting rigidity, oil clearance, lubricating oil pressure, oil viscosity etc.
Related dynamic characteristics data and elastic support shaft bearing outer wall amplitude when initially entering inelastic region and oil clearance
Percent value has important references value to application of the elastic bearing squeeze film damper in aero-engine development.Also,
The experimental rig of the present invention designs simple and effective, convenient for disassembly and assembly, reliable operation, can carry out elastic bearing squeeze film damper
Experimental study of more physical parameters to its damping behavior affecting laws.
In the present embodiment, the ontology 21 of elastic bearing is fixed on by 8 stove bolts 23 and small nut 24 in mounting base 10,
The outer wall of the bearing block 22 of elastic bearing is towards squeeze film outer shroud 30, and there are small―gap sutures therebetween.Squeeze film outer shroud 30
Upper and lower end face for plane, squeeze film outer shroud 30 is connected by 6 king-bolts 32 with mounting base 10.However, above structure
Connection mode is without being limited thereto.
30 inner wall of squeeze film outer shroud is provided with oil groove 33 and two seal grooves 34, and two seal grooves 34 are located at oil groove 33
Both sides.The lubricating oil of oil pump (not shown) supply is delivered to oil supplying hole 31 through fuel feed pump 35, subsequently into oil groove 33, and then
It is covered with entire squeeze film chamber D.Sealing ring 36 is equipped in two seal grooves 34, sealing ring 36 and the outer wall of bearing block 21 are close
Cooperation, plays sealing function, so that the lubricating oil with certain pressure will not be revealed from the both ends of squeeze film chamber, both favorably
In the foundation of squeeze film pressure, while it is also ensured that good test environment and the comfort of tester's operation.
Common exciting force can be analyzed to two orthogonal power, and therefore, in the present embodiment, there is provided two sets of exciting moulds
Intend mechanism, the two angle is 90 °, and the same frequency of two vibrators generations, the sine excitation power of 90 ° of phase difference then can synchronization motivationtheories
The bearing block 22 of elastic bearing, so as to the load applied during model rotor rotation to elastic bearing squeeze film damper.
Wherein, two sets of exciting simulation mechanisms is are symmetrical arranged relative to elastic bearing, in two orthogonal excitation cycles
Under power effect, the vibratory response of the bearing block outer wall of elastic bearing, acceleration transducer measures its corresponding vibratory response respectively,
Vibratory response accesses dynamic signal analyzer together with the mutually perpendicular exciting force of both direction.At further analysis
Reason, can obtain the relation curve between the vibratory response of elastic bearing squeeze film damper and exciting force.
In the present embodiment, each exciting simulation mechanism further includes force-transmitting seat 54, and the other end of exciting rod 51 passes through power transmission spiral shell
Bolt 55 and locking nut 56 are connect with force-transmitting seat 54, and the both ends of force-transmitting seat 54 are fixed on by hold-down bolt 57 on loaded ring 40.
Wherein, one end of loaded ring 40 is annular, and the other end of loaded ring 40 is rectangular, and force-transmitting seat 54 is arch, power transmission
The both ends of seat 54 and the other end of loaded ring 40 are fixed.
As shown in Figure 1, in the present embodiment, control mechanism may also include signal generator, power amplifier and controller, letter
Number generator is capable of the frequency and amplitude of the exciting force of adjusting vibration exciter, and power amplifier is capable of the power of adjusting vibration exciter, controls
Device processed is used to control vibrator.It can be with the big of the out-of-balance force in model rotor real work by the size for changing exciting force
Different rotating speeds small, that the frequency for changing exciting force can be in model rotor real work.Further, different bullets can also be studied
The parameters such as property support stiffness, oil clearance, oil viscosity, lubricating oil pressure are to elastic bearing squeeze film damper damping behavior
It influences to get to the damping behavior of elastic bearing squeeze film damper.
Specially：It is identical with amplitude, 90 ° of phase difference that HIOKI-7075 double-channel signals generator generates two frequencies
Sinusoidal signal.This two-way sinusoidal signal controls two B＆K-4826 respectively after the amplification of B＆K-2721 single channels power amplifier
The output parameter of vibrator makes it generate amplitude and the controllable equivalent rotary exciting force of frequency.Exciting force is through two BISE5110
After dynamic force sensor measuring, it is loaded on elastic bearing squeeze film damper.Two B＆K-4382V acceleration transducers are surveyed
The elastic bearing squeeze film damper vibratory response of amount, through B＆K-2692-0S4 four-ways charge amplifier amplification after and two
BISE5110 force sensor measurings through the amplified exciting force signal of SK6881 single channel charge amplifiers, access together
DEWE-3021 dynamic signal analyzers.At Dewesoft6.6.7 Dynamic Signals record and analysis software further analysis
Reason can obtain the relation curve of the vibratory response of elastic bearing squeeze film damper and exciting force and it is firm with elastic bearing
The changing rule of the parameters such as degree, oil clearance, oil viscosity, lubricating oil pressure is to get to elastic bearing squeeze film damper
Damping behavior.
In in one embodiment, elastic bearing squeeze film damper damping behavior test method is：It is mutual using direction
90 ° of 2 vibrator same frequencys vertically, phase difference excitations are carried out with obtaining rotation field of force exciting in the range of (10-1000) Hz
Sweep and vibration is tested.During experiment, the root vibration strains of orthogonal two springs on subject elastic bearing are measured
Amount measures the exciting force of exciting rod on this two direction；Measure the acceleration on orthogonal two direction of elastic support shaft bearing
Value measures output power and its frequency (being equivalent to speed-frequency) of vibrator etc., the numbers such as record oil viscosity, lubricating oil pressure
According to.
Change elastic supporting rigidity, oil clearance, oil viscosity and lubricating oil pressure etc. by design value and carry out above-mentioned experiment.
Suitable elastic supporting rigidity, oil clearance, oil viscosity and lubricating oil pressure are selected, classification changes exciting force size, obtains bullet
Property bearing strain and amplitude relation curve, find the percent value of the amplitude and oil clearance when initially entering inelastic region,
Obtain the damping behavior of elastic bearing squeeze film damper.
Above in relation to elastic bearing squeeze film damper damping behavior experimental rig, only by taking the device as an example, say
The specific design and implementation process of the bright present invention, it is not limited to the concrete structure of experimental rig.For those skilled in the art
For member, the invention may be variously modified and varied.Any modification for all within the spirits and principles of the present invention, being made,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Although exemplary embodiment describing the present invention with reference to several, it is to be understood that, term used is explanation and shows
Example property, term and not restrictive.The spirit or reality that can be embodied in a variety of forms without departing from invention due to the present invention
Matter, it should therefore be appreciated that above-described embodiment is not limited to any aforementioned details, and should be in the spirit that appended claims are limited
With widely explained in range, therefore the whole variations fallen into claim or its equivalent scope and remodeling all should be accompanying power
Profit requirement is covered.
Claims (7)
1. a kind of elastic bearing squeeze film damper damping behavior experimental rig, including：
Mounting base；
Resilient support, including ontology and bearing block, ontology is fixed in mounting base, and bearing block is fixedly connected with ontology and from originally
The side of body protrudes；
Squeeze film outer shroud is fixed on mounting base and is set around the periphery of bearing block, squeeze film outer shroud and bearing block it
Between there are gap, squeeze film outer shroud inner wall is provided with oil groove and two seal grooves, and two seal grooves are located at the both sides of oil groove,
Squeeze film outer shroud upper surface opens up oil supplying hole, is connected with oil groove, between lubricating oil can enter via oil supplying hole and oil groove
In gap, sealing ring, the outer wall tight fit of sealing ring and bearing block are equipped in two seal grooves；
Loaded ring, one end are sheathed on the inside of bearing block；
Exciting simulation mechanism, including vibrator, exciting rod, force snesor, force-transmitting seat and acceleration transducer, one end of exciting rod
It is connect with vibrator, the other end of exciting rod is connected by the other end of force-transmitting seat and loaded ring, and force snesor is fixed on exciting
On bar, acceleration transducer is set on the other end of loaded ring, and acceleration transducer is located at exciting rod institute on straight line, and with
Exciting rod is oppositely arranged；And
Control mechanism, including dynamic signal analyzer；
Wherein, under the action of vibrator, exciting rod applies exciting force to loaded ring so that bearing block generates vibration, and dynamic is believed
It can receive the exciting force signal that force snesor sends out and the vibration response signal that acceleration transducer is sent out for number analyzer, and
Obtain the vibratory response of elastic bearing squeeze film damper and the relation curve of exciting force.
2. elastic bearing squeeze film damper damping behavior experimental rig as described in claim 1, wherein, outside squeeze film
The oil supplying hole that ring upper surface opens up directly connects oil groove, and lubricating oil is delivered to oil supplying hole through fuel feed pump, and into oil groove, is formed
Squeeze film chamber with certain pressure.
3. elastic bearing squeeze film damper damping behavior experimental rig as claimed in claim 2, wherein, exciting analog machine
The quantity of structure is two sets, and the angle of two sets of exciting simulation mechanisms is 90 °, and the vibrator of two sets of exciting simulation mechanisms generates together
The exciting force of 90 ° of frequency and phase difference.
4. elastic bearing squeeze film damper damping behavior experimental rig as claimed in claim 3, wherein, each exciting mould
Intend mechanism and further include force-transmitting seat, the other end of exciting rod is connect by power transmission bolt and lock nut with force-transmitting seat, force-transmitting seat
Both ends are fixed on by hold-down bolt on loaded ring.
5. elastic bearing squeeze film damper damping behavior experimental rig as claimed in claim 4, wherein, force-transmitting seat is bow
Shape, the both ends of force-transmitting seat and the other end of loaded ring are fixed.
6. elastic bearing squeeze film damper damping behavior experimental rig as described in claim 1, wherein, control mechanism is also
Including signal generator, power amplifier and controller, signal generator is capable of the frequency and amplitude of adjusting vibration exciter, and power is put
Big device is capable of the power of adjusting vibration exciter, and controller is used to control vibrator.
7. elastic bearing squeeze film damper damping behavior experimental rig as described in claim 1, wherein, elastic bearing squeezes
The parameter of film damper is pressed to include elastic supporting rigidity, oil clearance, oil viscosity and lubricating oil pressure.
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| CN201610020546.2A CN105675276B (en) | 2016-01-13 | 2016-01-13 | A kind of elastic bearing squeeze film damper damping behavior experimental rig |
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| CN201610020546.2A CN105675276B (en) | 2016-01-13 | 2016-01-13 | A kind of elastic bearing squeeze film damper damping behavior experimental rig |
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