CN109975001A - A kind of the mould measurement device and test method of crankshaft tortional vibration damper - Google Patents
A kind of the mould measurement device and test method of crankshaft tortional vibration damper Download PDFInfo
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- CN109975001A CN109975001A CN201910353279.4A CN201910353279A CN109975001A CN 109975001 A CN109975001 A CN 109975001A CN 201910353279 A CN201910353279 A CN 201910353279A CN 109975001 A CN109975001 A CN 109975001A
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- vibration damper
- excitation
- aluminium block
- crankshaft tortional
- crankshaft
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- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 238000010998 test method Methods 0.000 title claims abstract description 12
- 230000005284 excitation Effects 0.000 claims abstract description 75
- 239000004411 aluminium Substances 0.000 claims abstract description 69
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 69
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 230000001133 acceleration Effects 0.000 claims abstract description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000004044 response Effects 0.000 claims description 10
- 125000003003 spiro group Chemical group 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 5
- 238000007405 data analysis Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000004936 stimulating effect Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention is the mould measurement device and test method of a kind of crankshaft tortional vibration damper, including iron floor, pedestal, exciting aluminium block, multiple three-dimensional acceleration transducers, power hammer, perhaps vibration excitor, locating shaft, crankshaft tortional vibration damper, multi-channel vibration noise test macro and computer are along the circumferential direction evenly arranged respectively there are four three-dimensional acceleration transducer in inertia rings or inertia rings and shell end face；Inertia rings and excitation aluminium block are tightly secured in together by the axially disposed connection screw thread hole of the excitation aluminium block by threaded pin；When for power hammer excitation, excitation aluminium block is cuboid, and excitation aluminium block is located exactly at inertia rings position directly above when installation, and the upper and lower side of cuboid is parallel with iron floor；It when for vibration excitor excitation, motivates and is uniformly distributed multiple exciting threaded holes on the side of aluminium block, in use, the exciting rod of a vibration excitor is threadedly coupled one of exciting threaded hole.The device and method can accurately identify the modal parameter of crankshaft tortional vibration damper.
Description
Technical field
The present invention relates to the mould measurement device of automobile vibration testing field more particularly to a kind of crankshaft tortional vibration damper and
Test method.
Background technique
When the engine operates, crankshaft system can twist vibration and bending vibration.Since crankshaft is longer, torsion stiffness
It is smaller, so the frequency of crankshaft torsional vibrations is lower, easily resonate in automobile normal revolution, therefore in order to reduce crankshaft
Vibration, the general measure using installation crankshaft tortional vibration damper.When crankshaft twists and vibrates, crankshaft tortional vibration damper is used to
Property ring and shell between relative motion meeting so that vibrational energy by rubber interior frictional damping absorb, make the twisting vibration of crankshaft
Cut down.Crankshaft tortional vibration damper has multiple vibration shapes, plays the vibration of mainly its torsional direction of damping effect, bent
The torsion modes frequency of axis torsional vibration damper should be close with the torsional frequency of crankshaft.
In existing frequently-used test method such as " rubber damping formula dynamic vibration absorber intrinsic frequency analysis of test methods ", test
System is made of vibration excitor, two acceleration transducers, tested crankshaft torsion bump leveller and signal acquiring system, is carried out power hammer and is swashed
Only one acceleration transducer exists when encouraging test, and directly percussion inertia rings export axial excitation, two acceleration transducers
When one be mounted on test fixture, one is mounted on bump leveller, obtains Vertical Acceleration, passes through vibration excitor or exciting
Platform gives crankshaft tortional vibration damper axial excitation, and crankshaft tortional vibration damper torsional oscillation mode is not easy to show under axial excitation, causes
Test result accuracy is poor.
Therefore, it is necessary to a kind of mould measurement device and test method dedicated for crankshaft tortional vibration damper is developed, with
The modal parameter of crankshaft tortional vibration damper is accurately identified, provides guidance work for the dynamic performance design of crankshaft tortional vibration damper
With.Especially because the special construction of crankshaft tortional vibration damper, mode is not easy to be motivated, especially around axis direction twisting vibration
Mode, the mould measurement device and test method developed should be easy to use power hammer or vibration excitor that it is motivated to turn round around axis direction
The dynamic mode of rotational oscillation.
Summary of the invention
There is the above problem in view of the prior art, the present invention proposes a kind of mould measurement device of crankshaft tortional vibration damper
And test method.The mould measurement device and test method of the crankshaft tortional vibration damper are easy to use power hammer or vibration excitor to motivate it
The mode of torsional direction can accurately identify the modal parameter of crankshaft tortional vibration damper, be the kinetics of crankshaft tortional vibration damper
It can design offer guidance.
According to an aspect of the present invention, a kind of mould measurement device of crankshaft tortional vibration damper is provided, including iron floor,
Pedestal, locating shaft, crankshaft tortional vibration damper, multi-channel vibration noise test macro and computer, which is characterized in that
The device further includes exciting aluminium block, multiple three-dimensional acceleration transducers, power hammer or vibration excitor；Multiple three-dimensionals accelerate
Degree sensor, power hammer or vibration excitor pass through the exclusive data of mating dedicated data line and multi-channel vibration noise test macro respectively
Connector connection；Multi-channel vibration noise test macro and calculating mechatronics；
The crankshaft tortional vibration damper is test specimen to be measured, is made of inertia rings, shell and rubber between the two；In inertia
Three-dimensional acceleration transducer there are four being along the circumferential direction evenly arranged respectively in ring or inertia rings and shell end face, every four are
One group, one group of three-dimensional acceleration transducer is located on the same circumference；One of three-dimensional acceleration transducer closely motivates aluminium
Block, and do not contacted with excitation aluminium block；
The excitation aluminium block axially disposed connection screw thread hole has pin in the inertia rings of the crankshaft tortional vibration damper
Threaded hole is threadedly coupled pin threaded hole and connection screw thread hole by threaded pin and is tightly secured in inertia rings and excitation aluminium block
Together；
When for power hammer excitation, excitation aluminium block is cuboid, and excitation aluminium block is located exactly at position right above inertia rings when installation
It sets, and the upper and lower side of cuboid is parallel with iron floor；
It when for vibration excitor excitation, motivates and is uniformly distributed multiple exciting threaded holes on the side of aluminium block, in use, one is swashed
The exciting rod of vibration device is threadedly coupled one of exciting threaded hole.
The pedestal is inverted T-shape, and the level board of inverted T-shape is connect by fixing bolt with iron floor, and inverted T-shape erects
Straight panel is provided with base plate through holes perpendicular to level board on vertical plate；
The locating shaft includes big column part and roundlet post part, diameter and the base plate through holes diameter phase of roundlet post part
Cooperation, small column partially passes through the base plate through holes on pedestal, and locating shaft is tightened together with pedestal using nut；Big cylinder
It is provided with positioning spiro pit along axial direction partially away from one end of roundlet post part, the outer diameter of big column part is carried on the back with that should be slightly less than shell
The internal diameter in portion hole, the two do not contact, positioning bolt pass through crankshaft tortional vibration damper central through hole and by on locating shaft
Crankshaft tortional vibration damper is anchored on pedestal by the threaded connection of positioning spiro pit, Bolt Tightening Force square and real vehicle installation condition phase
Together.
It is provided with gasket between inertia rings and excitation aluminium block, gasket is through in threaded pin, by adjusting the number of gasket
Amount can change the direction of connection screw thread hole on excitation aluminium block.
The diameter of the threaded pin is 4mm, and the excitation aluminium block is the cuboid of 10*10*20mm, and is mutually at two
The threaded hole that diameter is 4mm is provided on 90 degree of adjacent surface.
The present invention also provides a kind of mode testing methods of crankshaft tortional vibration damper, which is characterized in that the test method
Using above-mentioned crankshaft tortional vibration damper mould measurement device and the following steps are included:
Pedestal is fastened by bolts on iron floor, guarantees the stabilization of pedestal by step 1；Locating shaft is screwed
One end passes through the through-hole on pedestal, blending bolt fastening；Excitation aluminium block is used to be threadedly coupled by threaded pin and is fixed to song
In the inertia rings of axis torsional vibration damper；Crankshaft tortional vibration damper is placed on locating shaft, and rotates adjustment direction and to motivate
Aluminium block is directly on top, is bolted and crankshaft tortional vibration damper is anchored on locating shaft, and screw-down torque and real vehicle are installed
State is identical；If being motivated using vibration excitor, the exciting rod of vibration excitor should be connected through a screw thread to excitation aluminium block；
Step 2 selects four points to make respectively in the inertia rings of crankshaft tortional vibration damper or inertia rings and shell respectively
For test point, four test point positions in inertia rings and shell are evenly distributed along corresponding circumference；
Three-dimensional acceleration transducer is adsorbed at above-mentioned test point position by magnetic bases, and checked by step 3
The placement status of three-dimensional acceleration transducer avoids other positions of three-dimensional acceleration transducer and crankshaft tortional vibration damper from connecing
Touching；
Step 4 distinguishes hammer stimulating aluminium block along vehicle coordinate system X, Y and Z-direction using power hammer, or using vibration excitor into
The sine wave swept frequency excitation of row 100Hz to 600Hz utilizes the response at three-dimensional acceleration transducer measurement test point, multichannel
Computer disposal is sent to after vibration and noise test system acquisition response data；
Step 5 is chosen and is no less than the preferable data progress data analysis of 5 groups of consistency, obtains crankshaft tortional vibration damper
Frequency response curve and Mode Shape.
Compared with prior art, the beneficial effects of the invention are that:
The characteristics of present invention is according to crankshaft tortional vibration damper is provided with excitation aluminium block, can match simultaneously power hammer or
Vibration excitor, convenient for sufficiently motivating each to mode of crankshaft tortional vibration damper, the especially mode of oscillation around axis direction torsion, solution
Crankshaft tortional vibration damper determined since its special construction causes mode of oscillation to be not easy the problem of being motivated.The present invention can accurately know
The modal parameter of other crankshaft tortional vibration damper provides directive function for the dynamic performance design of crankshaft tortional vibration damper.This hair
Bright device can acquire the mode in three directions using multiple three-dimensional acceleration transducers,
The present invention can in test be cut by tangentially motivating excitation aluminium block to give the excitation of crankshaft tortional vibration damper torsional direction
The amplitude of crankshaft tortional vibration damper torsion frequency is 3.98g/n when motivating to (X), the crankshaft torsion vibration damping in axial direction (Y) excitation
The amplitude of device axial vibration frequency is 4.47g/n, and torsion frequency amplitude is only 1.86g/n, and tangential excitation can make torsional vibration damper
Torsion frequency is easier to differentiate.While by 4 three-dimensional acceleration transducers being arranged in inertia rings while acquiring acceleration
The data of data, acquisition can be calculated by the mating LMS Test Lab17 of test macro, obtain frequency response curve and mode
The vibration shape prevents the intrinsic frequency for obscuring each rank vibration.
Detailed description of the invention
Fig. 1 is the schematic diagram that crankshaft tortional vibration damper is installed on pedestal.
Connection schematic diagram of the Fig. 2 between pedestal and crankshaft tortional vibration damper.
Fig. 3 is point position schematic diagram.
Fig. 4 be power hammer into shape or vibration excitor, vibrating sensor, multichannel vibration test system and computer electrical connection
Figure.
Fig. 5 is the schematic perspective view of exciting aluminium block.
Single acceleration transducer measures number when Fig. 6 is axial excitation masses EA211 engine crankshaft twist vibration damper
Scheme according to corresponding FRF.
Fig. 7 when being tangential excitation masses EA211 crankshaft tortional vibration damper single acceleration transducer measure data it is right
The FRF figure answered.
Fig. 8 when being the matched crankshaft tortional vibration damper of one vapour car of axial excitation single acceleration transducer measure data
Corresponding FRF figure.
Fig. 9 when being the matched crankshaft tortional vibration damper of one vapour car of tangential excitation single acceleration transducer measure data
Corresponding FRF figure.
In figure, connection screw thread hole 1, positioning bolt 2, pedestal 3, gasket 4, inertia rings 5, shell 6, pin threaded hole
7, threaded pin 8, excitation aluminium block 9, locating shaft 10, positioning spiro pit 11, base plate through holes 12, crankshaft tortional vibration damper
13, exciting threaded hole 14, power hammer 15, three-dimensional acceleration transducer 16, multi-channel vibration noise test macro 17, computer into shape
18, vibration excitor 19, fixing bolt 20.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.It should be pointed out that those skilled in the art, not departing from this
Under the premise of inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
The present invention provides a kind of mould measurement device of crankshaft tortional vibration damper, as shown in Figures 1 to 4, including iron floor
(not marked in figure), pedestal 3, gasket 4, threaded pin 8, excitation aluminium block 9, locating shaft 10, crankshaft tortional vibration damper 13, Duo Gesan
To acceleration transducer 16, multi-channel vibration noise test macro 17 and computer 18,
The device further includes power hammer 15 or vibration excitor 19；Multiple three-dimensional acceleration transducers 16, power hammer 15 or vibration excitor
19 are connect by mating dedicated data line with the exclusive data connector of multi-channel vibration noise test macro 17 respectively, are specifically connected
Connecing mode is the prior art；Multi-channel vibration noise test macro 17 is electrically connected with computer 18；
The crankshaft tortional vibration damper 13 is test specimen to be measured, is made of inertia rings 5, shell 6 and rubber between the two；?
Three-dimensional acceleration transducer 16 there are four being along the circumferential direction evenly arranged respectively in inertia rings or inertia rings and shell end face, often
Four are one group, and one group of three-dimensional acceleration transducer is located on the same circumference；One of three-dimensional acceleration transducer 16 is tight
Excitation aluminium block is suffered, and is not contacted with excitation aluminium block；
The pedestal 3 is inverted T-shape, and the level board of inverted T-shape is connect by fixing bolt 20 with iron floor, inverted T-shape
Vertical plate perpendicular to level board, base plate through holes 12 are provided on vertical plate；
The locating shaft 10 includes big column part and roundlet post part, the diameter and base plate through holes diameter of roundlet post part
It matches, small column partially passes through the base plate through holes on pedestal, and locating shaft 10 is tightened together with pedestal 3 using nut；
The big one end of column part far from roundlet post part is provided with positioning spiro pit 11 along axial direction, the outer diameter of big column part with answer it is smaller
Internal diameter in shell back hole, the two do not contact, positioning bolt 2 pass through crankshaft tortional vibration damper 13 central through hole and by with
Crankshaft tortional vibration damper 13 is anchored on pedestal 3 by the threaded connection of the positioning spiro pit 11 on locating shaft, 2 screw-down torque of bolt
Identical as real vehicle installation condition, real vehicle torque is obtained by consulting auto repair handbook, and mounting torque is controlled by torque wrench；
The excitation aluminium block 9 axially disposed connection screw thread hole 1 has in the inertia rings 5 of the crankshaft tortional vibration damper 13
There is pin threaded hole 7, pin threaded hole 7 and connection screw thread hole 1 are threadedly coupled for inertia rings 5 and excitation aluminium by threaded pin 8
Block 9 is tightly secured in together；
When for power 15 excitation of hammer, excitation aluminium block 9 is cuboid, motivate when installation aluminium block 9 be located exactly at inertia rings just on
Orientation is set, and the upper and lower side of cuboid is parallel with iron floor；
It when for vibration excitor excitation, motivates and is uniformly distributed four exciting threaded holes 14 on the side of aluminium block 9, to facilitate connection
The exciting rod of vibration excitor；In use, the exciting rod of a vibration excitor is threadedly coupled one of exciting threaded hole.
It is provided with gasket 4 between inertia rings 5 and excitation aluminium block 9, gasket 4 is through in threaded pin 8, by adjusting gasket
4 quantity can change the direction of connection screw thread hole 1 on excitation aluminium block 9, and spacer thickness is different from threaded pin lead, different
The case where gasket quantity can change the direction of excitation aluminium block, and gasket particular number and hand of spiral are in relation to when actual measurement be
It is quasi-.Especially when using power hammer excitation, it is ensured that cuboid motivates the upper and lower side of aluminium block parallel with iron floor level.
The pedestal is made of the biggish metal material of density, preferably iron block, pedestal with a thickness of crankshaft tortional vibration damper
1~1.5 times of 13 thickness.
The present invention provides a kind of mode testing method of crankshaft tortional vibration damper, the specific steps are as follows:
Step 1: pedestal 3 is anchored on iron floor by fixing bolt 20, guarantee the stabilization of pedestal 3；By locating shaft 10
Screwed one end passes through the base plate through holes 12 on pedestal 3, and is fastened with nut；Excitation aluminium block 9 is adopted by threaded pin 8
It is threadedly coupled in the inertia rings 5 fixed to crankshaft tortional vibration damper 13；Crankshaft tortional vibration damper 13 is placed into locating shaft 10
On, and rotate adjustment direction and to motivate aluminium block 9 to be located at the surface of inertia rings 5 (pin threaded hole 7 in specific location such as schematic diagram
Center location be installation site), connected by 2 ground of positioning bolt and crankshaft tortional vibration damper 13 be anchored on locating shaft 10
On, screw-down torque is identical as real vehicle installation condition；It particularly, should swashing vibration excitor if motivated using vibration excitor 19
Vibration bar be connected through a screw thread to excitation aluminium block 9 on exciting threaded hole 14 in, and can be placed in threaded pin 8 different-thickness with
The gasket 4 of quantity will motivate the exciting threaded hole 14 on aluminium block 9 to adjust to the position of suitable connection exciting rod.If it is power
Hammer carries out exciting, the upper and lower side of aluminium block should will be motivated parallel with iron floor.
Step 2 selects four points to make respectively in the inertia rings of crankshaft tortional vibration damper or inertia rings and shell respectively
For test point, four test point positions in inertia rings and shell are evenly distributed along corresponding circumference；
Three-dimensional acceleration transducer is adsorbed at above-mentioned test point position by magnetic bases, and checked by step 3
The placement status of three-dimensional acceleration transducer, the side of three-dimensional acceleration transducer should be parallel or vertically and ground, avoid three-dimensional
Other of acceleration transducer and crankshaft tortional vibration damper location contacts refer to three opposite acceleration transducers except mounting surface and are used to
Property ring or shell corresponding position contact it is outer, other faces not with any location contacts of crankshaft tortional vibration damper；
Step 4 distinguishes hammer stimulating aluminium block 9 along vehicle coordinate system X, Y and Z-direction using power hammer 15, or uses vibration excitor
19 carry out the sine wave swept frequency excitation of 100Hz to 600Hz, measure the response at test point using three-dimensional acceleration transducer 16,
Multi-channel vibration noise test macro 17 is sent to the processing of computer 18 after acquiring response data.
Step 5 chooses the preferable data of multiple groups consistency and carries out data analysis, obtains the frequency of crankshaft tortional vibration damper 13
Curve and Mode Shape (Mode Shape is generally the form of every rank modal vibration) are rung, model and curve can pass through multi-pass
Vibration and noise test system 17 software kit in road directly obtains, it will be seen that modality type, particularly, the test data of selection are no less than
5 groups.
Embodiment 1
It is the cuboid of 1*1*2cm that aluminium block 9 is motivated in the present embodiment, and connection screw thread hole 1 is axially arranged in cuboid, can lead to
It crosses threaded pin 8 to be connected with inertia rings 5, exciting threaded hole 14, exciting screw thread is provided on the two neighboring side of cuboid
The distance at the center of circle in hole to edge is 1cm, convenient to be connected with vibration excitor.Locating shaft 10 is two connected cylindrical bodies, butt end cylinder
Body diameter 5cm, end face have positioning spiro pit 11, and 11 diameter of positioning spiro pit is equal to 2 diameter of positioning bolt, and taper end cylindrical body is straight
Diameter is equal to the diameter of base plate through holes 12, tapped on taper end cylindrical body.Pedestal 3 be it is T-shaped, bottom surface there are four installation through-hole,
12 size of installation through-hole is equal to 20 diameter of fixing bolt, and there are base plate through holes 12 in pedestal facade center.Remaining part is conventional part.
Gasket 4 is located between inertia rings 5 and excitation aluminium block 9, is through in threaded pin 8, by adjusting the quantity energy of gasket 4
Enough directions for changing exciting threaded hole 14 on excitation aluminium block 9, spacer thickness is different from threaded pin lead, different gasket quantity
Can change the direction of excitation aluminium block, gasket particular number and hand of spiral be related be subject to actual measurement when the case where, with convenient
Connect the exciting rod of vibration excitor.
17 concrete model of multi-channel vibration noise test macro is LMS SCADAS MONILE24 channel data acquisition system
System, 16 installation site of three-dimensional acceleration transducer is as shown in Figure 3.Kistler company can be used in three-dimensional acceleration transducer 16
The Modally Tuned of PCB company production can be used in the Piezo-Beam mode three-dimensional acceleration transducer of production, power hammer 15
Jump bit external member, vibration excitor 19 can be used commonly uses model on the market.Power hammer 15, three-dimensional acceleration transducer 16, vibration excitor 19 are logical
The mating dedicated data line of multichannel vibration and noise test system 17 is crossed, is connect with multi-channel vibration noise test macro 17, multi-pass
Road vibration and noise test system 17 has special data connecting interface.
The diameter of the threaded pin 8 is 4mm, is arranged on the excitation aluminium block 9 and the adjacent surface for being mutually 90 degree at two
Having diameter is the exciting threaded hole 14 of 4mm, and the gasket 4 of different-thickness and quantity is equipped between threaded pin 8 and excitation aluminium block 9.Institute
It states pedestal 3 to connect by fixing bolt 20 with iron floor, locating shaft 10 passes through the base plate through holes 12 on pedestal 3 and passes through nut and bottom
Seat 3 connects；Crankshaft tortional vibration damper 13 is connect by positioning bolt 2 with locating shaft 10, and Bolt Tightening Force square is 150Nm；Screw thread
Pin 8 is connect by screw thread with crankshaft tortional vibration damper and exciting aluminium block；The multi-channel vibration noise test macro and calculating
Machine 18 connects.
According to mode experiment principle it is found that the mode of testee excitation orientation can be easier to embody during the experiment
Come, the frequency in other directions can not possibly even be motivated.The frequency corresponding to peak value in frequency response chart (FRF figure) is
The mode of testee a direction, Fig. 6 are masses' EA211 engine crankshaft twist vibration damper when power hammers axial (Y-direction) excitation into shape
Upper single acceleration transducer measures the figure of FRF corresponding to data, and according to experimental principle, wherein highest peak value institute is right
The frequency answered is crankshaft tortional vibration damper axial vibration frequency, and amplitude 4.47g/n, this result is similar to single in the prior art
Solely carry out it is axial tap it is providing as a result, other peak values can not fast resolution corresponding to it be which direction mode, institute
(result and subsequent LMS Test Lab17 are tangentially motivated according to the application so that crankshaft tortional vibration damper torsional oscillation mode can not be read out
Torsional oscillation mode known to modal analysis result is third peak, amplitude 1.86g/n, and such crankshaft tortional vibration damper can motivate
Torsional oscillation mode is because select specific damper model out, but the other types crankshaft tortional vibration damper torsion frequency that material is different
It is likely to not motivate by axial excitation come Fig. 8, Fig. 9 are the crankshaft torsions using one vapour motorcar engine of power hammer excitation
FRF figure when damper axial direction, tangential excitation, comparison can find that crankshaft tortional vibration damper only motivates 458 when axial excitation,
627,754 three section frequencies, torsion frequency 356Hz is being motivated), crankshaft tortional vibration damper when Fig. 7 is tangential (X to) excitation
Single acceleration transducer measures the figure of FRF corresponding to data, can be seen that only crankshaft tortional vibration damper torsion frequency in figure
The mode in one direction of rate, amplitude 3.98g/n, the mode in other directions are not all motivated, during the experiment can be very
Clearly obtain the torsion frequency of crankshaft tortional vibration damper.
Simultaneously four acceleration transducers is needed to motivate when institute in three directions to analyze the corresponding vibration shape of each rank mode
(model analysis is a kind of method that the FRF figure for integrating multiple measuring points is overlapped fitting, single to survey for all data importing obtained
Point can not carry out model analysis, and crankshaft tortional vibration damper is circle, need four test points that could analyze each rank vibration shape.It is simultaneously
Ensure that the directive mode of institute can all motivate, so all modal datas for needing three directions to be obtained are whole
Importing just can be carried out analysis) LMS Test Lab17 calculated, and the vibration shape corresponding to each rank mode is calculated, it obtains more accurate
Data.
Rule of thumb formula calculates, and the torsion frequency of such masses' EA211 engine crankshaft twist vibration damper is 492Hz,
Simulation result is 512Hz, and precision is higher.
The present invention can sufficiently motivate each to mode of crankshaft tortional vibration damper 13, particularly convenient for using power hammer 15 and exciting
Device 19 motivates its torsion mode, can accurately identify the modal parameter of crankshaft tortional vibration damper, is the dynamic of crankshaft tortional vibration damper
Mechanical property design provides directive function.
The invention is mainly reflected on excitation aluminium block, and excitation aluminium block is fixed in inertia rings by pin, can be with
By motivating aluminium block with tangential percussion, or with vibration excitor pin is tangentially motivated, gives crankshaft tortional vibration damper torsional direction and swash
It encourages and (gives the excitation in what direction of testee in test, what the mode in object direction will show is more obvious).Excitation
Exciting threaded hole is provided on aluminium block, convenient for being connected with exciting rod of vibration generator.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
The present invention does not address place and is suitable for the prior art.
Claims (6)
1. a kind of mould measurement device of crankshaft tortional vibration damper, including iron floor, pedestal, locating shaft, crankshaft tortional vibration damper,
Multi-channel vibration noise test macro and computer, which is characterized in that
The device further includes exciting aluminium block, multiple three-dimensional acceleration transducers, power hammer or vibration excitor；Multiple three-dimensional acceleration pass
Sensor, power hammer or vibration excitor are connect by mating dedicated data line with the exclusive data of multi-channel vibration noise test macro respectively
Mouth connection；Multi-channel vibration noise test macro and calculating mechatronics；
The crankshaft tortional vibration damper is test specimen to be measured, is made of inertia rings, shell and rubber between the two；In inertia rings or
It is along the circumferential direction evenly arranged respectively in person's inertia rings and shell end face there are four three-dimensional acceleration transducer, every four are one
Group, one group of three-dimensional acceleration transducer are located on the same circumference；One of three-dimensional acceleration transducer closely motivates aluminium block,
And it is not contacted with excitation aluminium block；
The excitation aluminium block axially disposed connection screw thread hole has pin screw thread in the inertia rings of the crankshaft tortional vibration damper
Hole is threadedly coupled pin threaded hole and connection screw thread hole by threaded pin and inertia rings and excitation aluminium block is tightly secured in one
It rises；
When for power hammer excitation, excitation aluminium block is cuboid, and excitation aluminium block is located exactly at inertia rings position directly above when installation, and
The upper and lower side of cuboid is parallel with iron floor；
When for vibration excitor excitation, motivates and be uniformly distributed multiple exciting threaded holes on the side of aluminium block, in use, a vibration excitor
Exciting rod be threadedly coupled one of exciting threaded hole.
2. the mould measurement device of crankshaft tortional vibration damper according to claim 1, which is characterized in that the pedestal is to fall
T-shaped, the level board of inverted T-shape is connect by fixing bolt with iron floor, the vertical plate of inverted T-shape perpendicular to level board,
Base plate through holes are provided on vertical plate；
The locating shaft includes big column part and roundlet post part, and the diameter and base plate through holes diameter of roundlet post part match
It closes, small column partially passes through the base plate through holes on pedestal, and locating shaft is tightened together with pedestal using nut；Big cylindrical portion
Point one end far from roundlet post part is provided with positioning spiro pit along axial direction, the outer diameter of big column part and should be slightly less than shell back
The internal diameter in hole, the two do not contact, and positioning bolt passes through the central through hole of crankshaft tortional vibration damper and by determining on locating shaft
Crankshaft tortional vibration damper is anchored on pedestal by the threaded connection of position threaded hole, Bolt Tightening Force square and real vehicle installation condition phase
Together.
3. the mould measurement device of crankshaft tortional vibration damper according to claim 1, which is characterized in that in inertia rings and swash
It encourages and is provided with gasket between aluminium block, gasket is through in threaded pin, can be changed on excitation aluminium block by adjusting the quantity of gasket
The direction of connection screw thread hole.
4. the mould measurement device of crankshaft tortional vibration damper according to claim 1, which is characterized in that the threaded pin
Diameter be 4mm, the cuboid that the excitation aluminium block is 10*10*20mm and is provided on the adjacent surface for being mutually 90 degree at two
Diameter is the threaded hole of 4mm.
5. the mould measurement device of crankshaft tortional vibration damper according to claim 1, which is characterized in that pedestal with a thickness of
1~1.5 times of crankshaft tortional vibration damper thickness.
6. a kind of mode testing method of crankshaft tortional vibration damper, which is characterized in that the test method uses claim 2 institute
The mould measurement device for the crankshaft tortional vibration damper stated and the following steps are included:
Pedestal is fastened by bolts on iron floor, guarantees the stabilization of pedestal by step 1；By the screwed one end of locating shaft
Through-hole on pedestal, blending bolt fastening；Excitation aluminium block is fixed to crankshaft using threaded connection by threaded pin to turn round
Turn in the inertia rings of damper；Crankshaft tortional vibration damper is placed on locating shaft, and rotates adjustment direction and to motivate aluminium block
It is directly on top, it is bolted and crankshaft tortional vibration damper is anchored on locating shaft, screw-down torque and real vehicle installation condition
It is identical；If being motivated using vibration excitor, the exciting rod of vibration excitor should be connected through a screw thread to excitation aluminium block；
Step 2 selects four points as survey respectively in the inertia rings of crankshaft tortional vibration damper or inertia rings and shell respectively
Four test point positions on pilot, inertia rings and shell are evenly distributed along corresponding circumference；
Three-dimensional acceleration transducer is adsorbed at above-mentioned test point position by magnetic bases, and checks three-dimensional by step 3
The placement status of acceleration transducer avoids other location contacts of three-dimensional acceleration transducer and crankshaft tortional vibration damper；
Step 4 is distinguished hammer stimulating aluminium block along vehicle coordinate system X, Y and Z-direction using power hammer, or is carried out using vibration excitor
The sine wave swept frequency excitation of 100Hz to 600Hz utilizes the response at three-dimensional acceleration transducer measurement test point, multichannel vibration
Computer disposal is sent to after moving noise test macro acquisition response data；
Step 5 is chosen and is no less than the preferable data progress data analysis of 5 groups of consistency, obtains the frequency response of crankshaft tortional vibration damper
Curve and Mode Shape.
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| CN112729818A (en) * | 2021-02-04 | 2021-04-30 | 北京理工大学 | Testing device and method for torsional vibration modal test of gear box |
| CN112858480A (en) * | 2021-03-30 | 2021-05-28 | 齐鲁工业大学 | Mechanical axial excitation device and method for nondestructive testing of pipeline |
| CN113029536A (en) * | 2021-02-27 | 2021-06-25 | 重庆长安汽车股份有限公司 | Air conditioner pipeline vibration isolation performance testing method for controlling sound quality in vehicle |
| CN113504018A (en) * | 2021-07-13 | 2021-10-15 | 浙江吉利控股集团有限公司 | Method and system for quickly testing local static stiffness of mechanical structure |
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| CN112729818B (en) * | 2021-02-04 | 2022-03-15 | 北京理工大学 | Testing device and method for torsional vibration modal test of gear box |
| CN113029536A (en) * | 2021-02-27 | 2021-06-25 | 重庆长安汽车股份有限公司 | Air conditioner pipeline vibration isolation performance testing method for controlling sound quality in vehicle |
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| CN114414223A (en) * | 2021-12-16 | 2022-04-29 | 华中科技大学 | Non-contact type vehicle frame idling vibration sensing monitoring system |
| CN114689257A (en) * | 2022-03-11 | 2022-07-01 | 哈尔滨工程大学 | Vibration test excitation device and test method for ship composite material structure |
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