CN108918068B - A kind of the bullet branch rotator model experimental bench and test method of the connection of the tooth containing set - Google Patents
A kind of the bullet branch rotator model experimental bench and test method of the connection of the tooth containing set Download PDFInfo
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- CN108918068B CN108918068B CN201810747754.1A CN201810747754A CN108918068B CN 108918068 B CN108918068 B CN 108918068B CN 201810747754 A CN201810747754 A CN 201810747754A CN 108918068 B CN108918068 B CN 108918068B
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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
- G01M7/025—Measuring arrangements
Abstract
The invention belongs to aero-engine low pressure rotor system vibration testing experiment technical fields, are related to the bullet branch rotator model experimental bench and test method of a kind of connection of the tooth containing set.Experimental bench includes pedestal, rotor portion, rotor drive part, coupling segment, exciting part and part of data acquisition, and rotor portion includes shaft a and turntable a, squirrel-cage elastic support structure, set tooth connection structure, shaft b, turntable b, bearing block and support；Rotor drive part is electric spindle motor；Coupling segment includes left half a coupler and right half a coupler；Exciting part is the exciting force hammer with elastic rubber impact pad；Part of data acquisition includes acceleration transducer and current vortex sensor.Test method: the system containing prototype rotor of selected research carries out static and Dynamic Kinetic characteristic test to model, predicts the kinetic characteristics of rotor-support-foundation system by prototype rotor system parameter processing model rotor-support-foundation system.The present invention reduces experimental cost, shortens experimental period.
Description
Technical field
The invention belongs to aero-engine low pressure rotor system vibration testing experiment technical fields, are related to a kind of company of the tooth containing set
The bullet branch rotator model experimental bench and test method connect.
Background technique
Heart of the aero-engine as aircraft, and rotor-support-foundation system is its important component, the quality of performance is directly
Influence the overall performance of aircraft.As the low pressure rotor system of one of aero-engine critical component, in its actual application
In, the vibration and vibrating fatigue damage fault of low pressure rotor system always are the serious problems that aero-engine is faced, and
Failure more than 60% is as caused by rotor misalignment.
For real system, the reason of making rotor break down, has very much, and wherein coupling misalignment and when failure cause
Rotor-support-foundation system breaks down one of most common reason.
At this stage, vibration of rotor system experimental apparatus for testing does not consider to cover influence of the gear coupling to rotor-support-foundation system mostly,
And tested for static vibration, test frequency is low, and rotor-support-foundation system dimensional space is limited, and test content is single, and to rotor-support-foundation system
The experimental bench of dynamic vibration test is perfect not enough.
As the research and development to aero-engine performance increasingly higher demands, large aerospace engine are increasingly becoming heat
Point, for larger-size rotor-support-foundation system, not only size is big, and intrinsic frequency is high, directly carries out during design studies to it
Experiment, greatly prolongs at high cost and experimental period.
Summary of the invention
In view of the problems of the existing technology, the present invention provide it is a kind of containing set tooth connection bullet branch rotator model experimental bench and
Test method, the present invention are not only able to meet the static vibration test of the low pressure aviation rotor of the connection of the tooth containing set, can also meet low
The dynamic vibration test of aviation rotor is pressed to carry out after the binding kinetics theory of similarity to dynamic "scale" model rotor-support-foundation system
Test, to predict the vibration characteristics and fault characteristic of prototype rotor system, reduces experimental cost, shortens experimental period.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of bullet branch rotator model experimental bench of the connection of the tooth containing set, including pedestal 1, rotor portion, rotor drive part, connection
Axis device part, exciting part and part of data acquisition；
The pedestal 1 is equipped with T-slot, and motor cabinet 2, support 13 and fixing rack for sensor 17 are solid by bolt a14
It is scheduled in the T-slot of pedestal 1；
The rotor portion, including shaft a6 and turntable a7, squirrel-cage elastic support structure 8, set tooth connection structure 10,
Shaft b11, turntable b12, bearing block 5 and support 13；The shaft a6 is mounted on axis by squirrel-cage elastic support structure 8
It holds on seat 5；The turntable a7, is fixed on shaft a6 by expansion sleeve b18, and turntable a7 is located on shaft a6, except shaft a6
Position other than two axial ends；The shaft b11, is mounted on bearing block 5 by squirrel-cage elastic support structure 8；Described
Turntable b12 is fixed on shaft b11 by expansion sleeve a15, and turntable b12 is located on shaft b11, in addition to shaft b11 two axial ends
Position；The right end of the shaft a6 and the left end of shaft b11 pass through pin 9 by set 10 Joint of tooth connection structure
Axially position is carried out to set tooth connection structure 10；Squirrel-cage elastic support structure is installed outside the set tooth connection structure 10
8, squirrel-cage elastic support structure 8 is fixed on bearing block 5；The bearing block 5 is mounted on support 13, and support 13 is fixed on
On pedestal 1；
The rotor drive part, is electric spindle motor 3, and the power output end of electric spindle motor 3 passes through left half shaft coupling
The left end Joint of device 4 and right half a coupler 20 and shaft a6；The electric spindle motor 3 is mounted on motor cabinet 2, motor cabinet
2 are fixed on pedestal 1；
The coupling segment, including left half a coupler 4, right half a coupler 20, bolt b19 and expansion sleeve c21；It is described
Left half a coupler 4 and right half a coupler 20 there is uniformly distributed threaded hole on ring flange, the bolt of threaded hole is run through by tightening
B19 makes shaft coupling hold connected axis tightly, and left half a coupler 4 is connected with the power output end of electric spindle motor 3, right half shaft coupling
Device 20 is connected with the left end of shaft a6, and is fastened by expansion sleeve c21；
The part of data acquisition, including data collection system, six acceleration transducers and six current vortex sensings
Device 16；The acceleration transducer is equidistantly inhaled by magnet in the lower surface of shaft a6 and shaft b11, acceleration transducer
It is connected with data collection system acquisition port；The current vortex sensor 16 is mounted on fixing rack for sensor 17；Sensor
Fixed frame 17 is made of two crossbeams and a vertical beam, and two crossbeams are separately fixed at the top and bottom of vertical beam, vertical beam it is upper
Portion is equipped with a current vortex sensor 16, and a vertical intermediate plate is equipped in the middle part of vertical beam, is equipped with one on intermediate plate
A current vortex sensor 16, so that two current vortex sensors 16 on vertical beam are arranged vertically；One is equipped in top cross-bar
Current vortex sensor 16；Two fixing rack for sensor 17 be fixed on pedestal 1 by base cross members and respectively close to turntable a7 and
Turntable b12；
The exciting part, including the exciting force hammer with elastic rubber impact pad, one end of exciting force hammer and data are adopted
Collecting system acquisition port is connected.
A kind of test method of the bullet branch rotator model experimental bench of the connection of the tooth containing set, comprising the following steps:
Step 1: the prototype rotor system of selected research, while recording the relevant parameter of prototype rotor system；
Step 2: test model rotor is determined by the relevant parameter of prototype rotor system according to dynamic similarity principle
The relevant parameter of system；Specifically comprise the following steps:
1): determining the geometric dimension parameter of shaft
Regard shaft a and shaft b as an axis, as prototype shaft, in conjunction with prototype shaft and experimental bench geometric space, really
Cover half type shaft and each relevant parameter likelihood ratio of prototype shaft, model shaft are multi-diameter shaft, model shaft geometric dimension parameter
Similarity relation are as follows:
λl=lim/lip
λd=dim/dip
Wherein, λlFor the shaft length likelihood ratio, limFor the i-th segment length of model shaft, lipFor the i-th segment length of prototype shaft,
λdFor the shaft diameter likelihood ratio, dimFor i-th section of diameter of model shaft, dipI-th section of diameter of prototype shaft.
2): determining the material parameter of shaft
The material parameter similarity relation of shaft are as follows:
λE=Em/Ep
λρ=ρm/ρp
λμ=μm/μp
Wherein, λEFor the shaft elasticity modulus likelihood ratio, EmFor the elasticity modulus of model shaft, EpFor the elasticity of prototype shaft
Modulus, λρFor the shaft density likelihood ratio, ρmFor model shaft density, ρpFor prototype shaft density, λμFor the Poisson's ratio likelihood ratio, μmFor
Model shaft Poisson's ratio, μpFor prototype shaft Poisson's ratio.
3): determining the material parameter of turntable
The material parameter similarity relation of turntable are as follows:
λE′=E 'm/E′p
λρ′=ρ 'm/ρ′p
λμ′=μ 'm/μ′p
Wherein, λE′For the turntable elasticity modulus likelihood ratio, E 'mFor the elasticity modulus of model turntable, E 'pFor the bullet of prototype turntable
Property modulus, λρ′For the turntable density likelihood ratio, ρ 'mFor model turntable density, ρ 'pFor prototype turntable density, λμ′It is similar for Poisson's ratio
Than μ 'mFor model turntable Poisson's ratio, μ 'pFor prototype turntable Poisson's ratio.
4): determining the geometric dimension parameter of turntable
The similarity relation of model turntable geometric dimension parameter are as follows:
Wherein, λDFor the turntable outer diameter likelihood ratio, DmFor the outer diameter of model disk, DpFor the outer diameter of prototype disk, λLFor turntable width
The likelihood ratio, LmFor the width of model disk, LpFor the width of prototype disk, λρFor the shaft density likelihood ratio, λρ' it is that turntable density is similar
Than h is the ratio of prototype turntable internal diameter and outer diameter.
5): determining the geometric dimension of squirrel-cage elastic support structure
The similarity relation of model squirrel-cage elastic support structure geometric dimension parameter:
λb=bm/bp
λL=Lm/Lp
λh=hm/hp
Wherein, λbFor the squirrel-cage elastic support structure cage width likelihood ratio, bmFor the width of model cage item, bpFor prototype
The width of cage item.λLFor the squirrel-cage elastic support structure cage length likelihood ratio, LmFor the length of model cage item, LpFor prototype cage
The length of item.λhFor the squirrel-cage elastic support structure cage thickness likelihood ratio, hmFor the thickness of model cage item, hpFor prototype cage item
Thickness.N is squirrel-cage elastic support structure cage item number.
Step 3: according to the relevant parameter of the model rotor system determined in step 2, processing experiment model rotor system；
Step 4: testing test model rotor-support-foundation system, static vibration test and mould including model rotor system
The dynamic vibration of type rotor-support-foundation system is tested；
1), the static vibration test of model rotor system
Before carrying out static vibration test, six acceleration transducers are equidistantly inhaled by magnet in shaft a, shaft b
Lower section, the other end of acceleration transducer are connected with the acquisition port of data collection system, and model rotor static system shakes at this time
The preparation of dynamic test finishes；
Start carry out model rotor system static vibration test, using exciting force hammer with second acceleration transducer
Opposite direction is tapped, and sensor serial number successively becomes larger from one end close to electric spindle motor, and exciting force hammer will hit against
The data that model rotor system generates are transferred to computer by data line, and using computer to the data of acquisition at
Reason, finally obtains the static natural frequency ω of model rotor systemmAnd the vibration shape；
2), the dynamic vibration test of model rotor system
Before carrying out dynamic vibration test, six current vortex sensors are equally spaced below shaft a, shaft b, separately
One end is connected with the acquisition port of data collection system, and the beam worker before model rotor system dynamic vibration test at this time is finished
Finish；
The dynamic vibration for starting to carry out model rotor system is tested, first starting electric spindle motor, passes through electric spindle motor
Shaft and turntable rotation are driven, the revolving speed of electric spindle motor is set, during rotor-support-foundation system rotation, six current vortex sensings
Device constantly acquires data and the data of acquisition is transferred to computer, is handled by data of the computer to acquisition, most
The dynamic natural frequency ω of model rotor system is obtained eventuallydmAnd the vibration shape.
Step 5: resulting test result is tested by carrying out static and dynamic vibration to model rotor system, prediction is former
The kinetic characteristics of type rotor-support-foundation system, it may be assumed that the static state and dynamic intrinsic frequency and the vibration shape of prediction prototype rotor system are specific to predict
Method is as follows:
1) the static intrinsic frequency of prototype rotor system are as follows:
Wherein, ωmFor the static intrinsic frequency of model rotor system, ωpFor the static intrinsic frequency of prototype rotor system,
λdThe likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density
The likelihood ratio.
2) the dynamic intrinsic frequency of prototype rotor system are as follows:
Wherein, ωdmFor the dynamic intrinsic frequency of model rotor system, ωdpFor the intrinsic frequency of dynamic of prototype rotor system
Rate, λdThe likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density
The likelihood ratio.
Beneficial effects of the present invention:
Compared with prior art, the present invention significant advantage is to evoke high order of frequency by the slow-speed of revolution.The present invention is not only
The static vibration test and dynamic vibration test that can satisfy rotor-support-foundation system, after the binding kinetics theory of similarity, to dynamics
Scale model rotor-support-foundation system is tested, to predict the vibration characteristics and fault characteristic of prototype rotor system, reduce experiment at
This, shortens experimental period.
Detailed description of the invention
Fig. 1 is the schematic diagram of experimental bench structure of the invention.
Fig. 2 is the structural schematic diagram of fixing rack for sensor.
In figure: 1 pedestal；2 motor cabinets；3 electric spindle motors；4 left half a couplers；5 bearing blocks；6 shaft a；7 turntable a；8 mouse
Cage elastic support structure；9 pins；10 sets of tooth connection structures；11 shaft b；12 turntable b；13 supports；14 bolt a；15 expansion sleeves
a；16 current vortex sensors；17 fixing rack for sensor；18 expansion sleeve b；19 bolt b；20 right half a couplers；21 expansion sleeve c.
Specific embodiment
Below in conjunction with attached drawing and technical solution, a specific embodiment of the invention is further illustrated.
As shown in Figure 1, a kind of bullet branch rotator model experimental bench of the connection of the tooth containing set, including pedestal 1, rotor portion, rotor
Drive part, coupling segment, exciting part and part of data acquisition；
The rotor portion includes shaft a6, turntable a7, squirrel-cage elastic support structure 8, set tooth connection structure 10, turns
Axis b11, turntable b12, bearing block 5, support 13, are fixedly installed with turntable a7 on shaft a6, and shaft a6 passes through bearing block 5, branch
Seat 13 is fixed on pedestal 1, and bearing block 5 is connected with support 13 by bolt, and support 13 is connected with pedestal 1 by bolt a14
It connects, electric spindle motor 3 is fixed on pedestal 1 by motor cabinet 2, and electric spindle motor 3 is connected with motor cabinet 2 by bolt, electricity
Base 2 is connected with pedestal 1 by bolt a14.
The coupling segment includes that left half a coupler 4, right half a coupler 20, bolt b 19 and expansion sleeve 21 form,
Left half a coupler 4 and right half a coupler 20 have uniformly distributed threaded hole on ring flange, and the bolt b of threaded hole is run through by tightening
19, so that shaft coupling is held connected axis tightly, left half a coupler 4 is connected with the power output end of electric spindle motor 3, right half a coupler
20 are connected with the left end of shaft a6.
The part of data acquisition includes acceleration transducer, current vortex sensor 16 and fixing rack for sensor 17, is passed
Sensor fixed frame 17 is mounted on pedestal 1 by bolt a14, three circular holes is arranged, altogether on fixing rack for sensor 17 for pacifying
Fill current vortex sensor 16.
The shaft a6 and shaft b11 is fixed together by covering tooth connection structure 10, passes through 9 pairs of set tooth connections of pin
Structure 10 carries out axially position, and set tooth connection structure 10 is equipped with squirrel-cage elastic support structure 8, and is fixed on support 13.
The turntable a7 is fixed on shaft a6 by expansion sleeve b18.
The turntable b12 is fixed on shaft b11 by expansion sleeve a15.
Several T-slots are provided on the pedestal 1, motor cabinet 2, support 13, fixing rack for sensor 17 pass through T-slot
It is packed on pedestal 1.
Using a kind of test method of the bullet branch rotator model experimental bench of connection of the tooth containing set, comprising the following steps:
Step 1: the prototype rotor system of selected research, while recording the relevant parameter of prototype rotor system, as table 1,
Shown in table 2, table 3 and table 4:
The dimensional parameters of table 1 prototype shaft a6 and turntable a7
The dimensional parameters of table 2 prototype shaft b11 and turntable b12
The material parameter of table 3 prototype shaft and turntable
The dimensional parameters of 4 prototype squirrel-cage elastic support structure of table
Step 2: the model of experiment is determined by the relevant parameter of prototype rotor system according to dynamic similarity principle
The relevant parameter of rotor-support-foundation system, specifically comprises the following steps:
1): determining the geometric dimension parameter of model shaft
In conjunction with prototype rotor system dimension and experimental bench geometric space, λ is takenl=0.8, λd=0.5, by
λl=lm/lp
λd=dm/dp
It can obtain: lmAnd dm, as shown in table 5 and table 6.
The dimensional parameters of table 5 model shaft a and model turntable a
The dimensional parameters of table 6 model shaft b and model turntable b
Wherein, λlFor the shaft length likelihood ratio, limFor i-th section of length of model shaft, lipIt is long for i-th section of prototype shaft
Degree, λdFor the shaft diameter likelihood ratio, dimFor i-th section of diameter of model shaft, dipI-th section of diameter of prototype shaft.
2): determining the material parameter of model shaft
The material of prototype shaft is No. 45 steel, and the material of model shaft is similarly No. 45 steel, it is known that the material of model shaft
Parameter is Em=2.09 × 1011Pa,ρm=7850kg/m3,μm=0.3, by
λE=Em/Ep
λρ=ρm/ρp
λμ=μm/μp
λ can be obtainedE=1, λρ=1, λμ=1；
Wherein, λEFor the shaft elasticity modulus likelihood ratio, EmFor the elasticity modulus of model shaft, EpFor the elasticity of prototype shaft
Modulus, λρFor the shaft density likelihood ratio, ρmFor model shaft density, ρpFor prototype shaft density, λμFor the Poisson's ratio likelihood ratio, μmFor
Model shaft Poisson's ratio, μpFor prototype shaft Poisson's ratio.
3): determining the material parameter of model turntable
The material of prototype turntable is No. 45 steel, and the material of model turntable is also No. 45 steel, it is known that the material of model turntable is joined
Number is E 'm=2.09 × 1011Pa,ρ′m=7850kg/m3,μ′m=0.3, by
λE′=E 'm/E′p
λρ′=ρ 'm/ρ′p
λμ′=μ 'm/μ′p
λ can be obtainedE′=1, λρ′=1, λμ′=1.
Wherein, λE′For the turntable elasticity modulus likelihood ratio, E 'mFor the elasticity modulus of model turntable, E 'pFor the bullet of prototype turntable
Property modulus, λρ′For the turntable density likelihood ratio, ρ 'mFor model turntable density, ρ 'pFor prototype turntable density, λμ′It is similar for Poisson's ratio
Than μ 'mFor model turntable Poisson's ratio, μ 'pFor prototype turntable Poisson's ratio.
4): determining the geometric dimension parameter of model turntable
The outer diameter D of turntable a71p=200mm, length L1p=40mm, by
D can be obtained1m=89mm, L1m=9mm.Similarly, the outer diameter and length of model turntable b12 are as follows: D1m=62mm, L1m=
7mm。
Wherein, λDFor the turntable outer diameter likelihood ratio, DmFor the outer diameter of model disk, DpFor the outer diameter of prototype disk, λLFor turntable width
The likelihood ratio, LmFor the width of model disk, LpFor the width of prototype disk, λρFor the shaft density likelihood ratio, λρ′It is similar for turntable density
Than h is the ratio of prototype turntable internal diameter and outer diameter.
5): determining the geometric dimension parameter of the squirrel-cage elastic support structure of model
The dimensional parameters of 7 prototype squirrel-cage elastic support structure of table
The squirrel-cage elastic support structure of prototype is as shown in table 7, empty in conjunction with prototype rotor system dimension and experimental bench geometry
Between, take λL=0.8, λb=0.5, λh=0.5 by
λb=bm/bp
λL=Lm/Lp
λh=hm/hp
It can obtain: bm, Lm,hmAs shown in table 8.
The dimensional parameters of 8 model squirrel-cage elastic support structure of table
Wherein, λbFor the squirrel-cage elastic support structure cage width likelihood ratio, bmFor the width of model cage item, bpFor prototype
The width of cage item.λLFor the squirrel-cage elastic support structure cage length likelihood ratio, LmFor the length of model cage item, LpFor prototype cage
The length of item.λhFor the squirrel-cage elastic support structure cage thickness likelihood ratio, hmFor the thickness of model cage item, hpFor prototype cage item
Thickness.N is squirrel-cage elastic support structure cage item number.
Wherein, λkFor the likelihood ratio of bearing rigidity, kmFor the rigidity of model bearing, kpThe rigidity of prototype bearing.λEFor shaft
The elasticity modulus likelihood ratio, λdFor the shaft diameter likelihood ratio, λlFor the likelihood ratio of shaft length.
The relevant parameter of collective model rotor-support-foundation system, such as table 9, table 10, shown in table 11 and table 8:
The dimensional parameters of table 9 model shaft a6 and model turntable a7
The dimensional parameters of table 10 model shaft b11 and model turntable b12
The material parameter of table 11 model shaft and model turntable
Step 3: according to the relevant parameter in the model rotor system in table 9, table 10, table 11 and table 8, processing experiment mould
Type rotor-support-foundation system；
Step 4: testing manufactured model rotor system, and the static vibration including model rotor system is surveyed
The dynamic vibration of examination and model rotor system is tested:
1), the static vibration test of model rotor system
Before carrying out static vibration test, six acceleration transducers are equidistantly inhaled by magnet in shaft a6, shaft
Below b11, the other end is connected with the acquisition port of data collection system, at this time the standard before model rotor static system vibration-testing
Standby work finishes；
Start carry out model rotor system static vibration test, using model L-YD-312A exciting force hammer with
Second opposite direction of acceleration transducer is tapped, and is transferred to computer by data line, and counted by LMS system
According to acquisition and processing.
2), the dynamic vibration test of model rotor system
Before carrying out dynamic vibration test, six current vortex sensors 16 are equally spaced at shaft a6, shaft b11
Side, the other end are connected with the acquisition port of data collection system, the beam worker before model rotor system dynamic vibration test at this time
It finishes；
The dynamic vibration for starting to carry out model rotor system is tested, first starting electric spindle motor 3, passes through electric spindle motor
3 drive shaft and turntable rotation, set the revolving speed of electric spindle motor 3, and during rotor-support-foundation system rotation, six current vortexs are passed
Sensor 16 constantly acquisition data simultaneously the data of acquisition are transferred to computer, by computer to the data of acquisition at
Reason.
Step 5: resulting test result is tested by carrying out static and dynamic vibration to model rotor system, prediction is former
The kinetic characteristics of type rotor-support-foundation system, the i.e. static state of prediction prototype rotor system and dynamic intrinsic frequency and the vibration shape, it is specific to predict
Method is as follows:
(1) the static intrinsic frequency of prototype rotor system is
Wherein, ωmFor the static intrinsic frequency of model rotor system, ωpFor the static intrinsic frequency of prototype rotor system,
λdThe likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density
The likelihood ratio.
According to the static intrinsic frequency for the model rotor system that test measures, the static state that prototype rotor system is calculated is solid
There is frequency.
(2) the dynamic intrinsic frequency of prototype rotor system is
Wherein, ωdmFor the dynamic intrinsic frequency of model rotor system, ωdpFor the intrinsic frequency of dynamic of prototype rotor system
Rate, λdThe likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density
The likelihood ratio.
According to the dynamic intrinsic frequency for the model rotor system that test measures, the dynamic that prototype rotor system is calculated is solid
There is frequency.
Claims (2)
1. it is a kind of containing set tooth connection bullet branch rotator model experimental bench, which is characterized in that the experimental bench include pedestal (1),
Rotor portion, rotor drive part, coupling segment, exciting part and part of data acquisition；
The pedestal (1) is equipped with T-slot, and motor cabinet (2), support (13) and fixing rack for sensor (17) pass through bolt a
(14) it is fixed in the T-slot of pedestal (1)；
The rotor portion, including shaft a (6) and turntable a (7), squirrel-cage elastic support structure (8), set tooth connection structure
(10), shaft b (11), turntable b (12), bearing block (5) and support (13)；The shaft a (6), passes through squirrel-cage elasticity branch
Support structure (8) is mounted on bearing block (5)；The turntable a (7), is fixed on shaft a (6) by expansion sleeve b (18), is turned
Disk a (7) is located on shaft a (6), the position in addition to shaft a (6) two axial ends；The shaft b (11), passes through squirrel-cage bullet
Property support construction (8) is mounted on bearing block (5)；The turntable b (12) is fixed on shaft b (11) by expansion sleeve a (15)
On, turntable b (12) is located on shaft b (11), the position in addition to shaft b (11) two axial ends；The right end of the shaft a (6)
With the left end of shaft b (11) by set tooth connection structure (10) Joint, and by pin (9) to set tooth connection structure (10) into
Row axially position；It is equipped with squirrel-cage elastic support structure (8) outside the set tooth connection structure (10), squirrel-cage elasticity branch
Support structure (8) is fixed on bearing block (5)；The bearing block (5) is mounted on support (13), and support (13) is fixed on pedestal
(1) on；
The rotor drive part is electric spindle motor (3) that the power output end of electric spindle motor (3) passes through left half shaft coupling
The left end Joint of device (4) and right half a coupler (20) and shaft a (6)；The electric spindle motor (3) is mounted on motor cabinet
(2) on, motor cabinet (2) is fixed on pedestal (1)；
The coupling segment, including left half a coupler (4), right half a coupler (20), bolt b (19) and expansion sleeve c (21)；
The left half a coupler (4) and right half a coupler (20) has uniformly distributed threaded hole on ring flange, runs through screw thread by tightening
The bolt b (19) in hole makes shaft coupling hold connected axis, the power output end of left half a coupler (4) and electric spindle motor (3) tightly
It is connected, right half a coupler (20) is connected with the left end of shaft a (6), and is fastened by expansion sleeve c (21)；
The part of data acquisition, including data collection system, six acceleration transducers and six current vortex sensors
(16)；The acceleration transducer is equidistantly inhaled by magnet in the lower surface of shaft a (6) and shaft b (11), and acceleration passes
Sensor is connected with data collection system acquisition port；The current vortex sensor (16) is mounted on fixing rack for sensor (17)
On；Fixing rack for sensor (17) You Lianggen crossbeam and a vertical beam composition, two crossbeams are separately fixed at the top and bottom of vertical beam
Portion, the top of vertical beam are equipped with a current vortex sensor (16), and a vertical intermediate plate is equipped in the middle part of vertical beam, intermediate
One current vortex sensor (16) is installed, so that two current vortex sensors (16) on vertical beam are arranged vertically on plate；Top
One current vortex sensor (16) is installed on crossbeam；Two fixing rack for sensor (17) are fixed on pedestal by base cross members
(1) on and respectively close to turntable a (7) and turntable b (12)；
The exciting part, including the exciting force hammer with elastic rubber impact pad, one end of exciting force hammer and data acquisition system
System acquisition port is connected.
2. using a kind of test method of the bullet branch rotator model experimental bench of the connection of the tooth containing set described in claim 1, feature
It is, comprising the following steps:
Step 1: the prototype rotor system of selected research, while recording the relevant parameter of prototype rotor system；
Step 2: test model rotor-support-foundation system is determined by the relevant parameter of prototype rotor system according to dynamic similarity principle
Relevant parameter；Specifically comprise the following steps:
1): determining the geometric dimension parameter of shaft
Regard shaft a and shaft b as an axis, determines mould in conjunction with prototype shaft and experimental bench geometric space as prototype shaft
Type shaft and each relevant parameter likelihood ratio of prototype shaft, model shaft are multi-diameter shaft, model shaft geometric dimension parameter it is similar
Relationship are as follows:
λl=lim/lip
λd=dim/dip
Wherein, λlFor the shaft length likelihood ratio, limFor the i-th segment length of model shaft, lipFor the i-th segment length of prototype shaft, λdFor
The shaft diameter likelihood ratio, dimFor i-th section of diameter of model shaft, dipI-th section of diameter of prototype shaft；
2): determining the material parameter of shaft
The material parameter similarity relation of shaft are as follows:
λE=Em/Ep
λρ=ρm/ρp
λμ=μm/μp
Wherein, λEFor the shaft elasticity modulus likelihood ratio, EmFor the elasticity modulus of model shaft, EpFor the elasticity modulus of prototype shaft,
λρFor the shaft density likelihood ratio, ρmFor model shaft density, ρpFor prototype shaft density, λμFor the Poisson's ratio likelihood ratio, μmFor model
Shaft Poisson's ratio, μpFor prototype shaft Poisson's ratio；
3): determining the material parameter of turntable
The material parameter similarity relation of turntable are as follows:
λE′=E 'm/E′p
λρ′=ρ 'm/ρ′p
λμ′=μ 'm/μ′p
Wherein, λE′For the turntable elasticity modulus likelihood ratio, E 'mFor the elasticity modulus of model turntable, E 'pFor the springform of prototype turntable
Amount, λρ′For the turntable density likelihood ratio, ρ 'mFor model turntable density, ρ 'pFor prototype turntable density, λμ′For the Poisson's ratio likelihood ratio,
μ′mFor model turntable Poisson's ratio, μ 'pFor prototype turntable Poisson's ratio；
4): determining the geometric dimension parameter of turntable
The similarity relation of model turntable geometric dimension parameter are as follows:
Wherein, λDFor the turntable outer diameter likelihood ratio, DmFor the outer diameter of model disk, DpFor the outer diameter of prototype disk, λLIt is similar for turntable width
Than LmFor the width of model disk, LpFor the width of prototype disk, λρFor the shaft density likelihood ratio, λρ′For the turntable density likelihood ratio, h is
The ratio of prototype turntable internal diameter and outer diameter；
5): determining the geometric dimension of squirrel-cage elastic support structure
The similarity relation of model squirrel-cage elastic support structure geometric dimension parameter:
λb=bm/bp
λL=Lm/Lp
λh=hm/hp
Wherein, λbFor the squirrel-cage elastic support structure cage width likelihood ratio, bmFor the width of model cage item, bpFor prototype cage item
Width；λLFor the squirrel-cage elastic support structure cage length likelihood ratio, LmFor the length of model cage item, LpFor prototype cage item
Length；λhFor the squirrel-cage elastic support structure cage thickness likelihood ratio, hmFor the thickness of model cage item, hpFor the thickness of prototype cage item
Degree；N is squirrel-cage elastic support structure cage item number；
Step 3: according to the relevant parameter of the model rotor system determined in step 2, processing experiment model rotor system；
Step 4: testing test model rotor-support-foundation system, and static vibration test and model including model rotor system turn
The dynamic vibration of subsystem is tested；
1), the static vibration test of model rotor system
Before carrying out static vibration test, six acceleration transducers are equidistantly inhaled below shaft a, shaft b by magnet,
The other end of acceleration transducer is connected with the acquisition port of data collection system, at this time model rotor static system vibration-testing
Preparation finish；
The static vibration for starting to carry out model rotor system is tested, and is hammered into shape using exciting force opposite with second acceleration transducer
Direction tapped, sensor serial number successively becomes larger from close to one end of electric spindle motor, and exciting force hammer will hit against model
The data that rotor-support-foundation system generates, are transferred to computer by data line, and handle using data of the computer to acquisition, most
The static natural frequency ω of model rotor system is obtained eventuallymAnd the vibration shape；
2), the dynamic vibration test of model rotor system
Before carrying out dynamic vibration test, six current vortex sensors are equally spaced below shaft a, shaft b, the other end
It is connected with the acquisition port of data collection system, the preparation before model rotor system dynamic vibration test at this time finishes；
The dynamic vibration for starting to carry out model rotor system is tested, first starting electric spindle motor, is driven by electric spindle motor
Shaft and turntable rotation, set the revolving speed of electric spindle motor, and during rotor-support-foundation system rotation, six current vortex sensors are not
The data of acquisition are simultaneously transferred to computer by disconnected acquisition data, are handled by data of the computer to acquisition, final
To the dynamic natural frequency ω of model rotor systemdmAnd the vibration shape；
Step 5: resulting test result is tested by carrying out static and dynamic vibration to model rotor system, prediction prototype turns
The kinetic characteristics of subsystem, it may be assumed that the static state and dynamic intrinsic frequency and the vibration shape of prediction prototype rotor system, specific prediction technique
It is as follows:
1) the static intrinsic frequency of prototype rotor system are as follows:
Wherein, ωmFor the static intrinsic frequency of model rotor system, ωpFor the static intrinsic frequency of prototype rotor system, λdTurn
The likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density it is similar
Than；
2) the dynamic intrinsic frequency of prototype rotor system are as follows:
Wherein, ωdmFor the dynamic intrinsic frequency of model rotor system, ωdpFor the dynamic intrinsic frequency of prototype rotor system, λdTurn
The likelihood ratio of shaft diameter, λlFor the likelihood ratio of shaft length, λEFor the likelihood ratio of shaft elasticity modulus, λρShaft density it is similar
Than.
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