CN206618489U - A kind of Wheel Rail Contact state is detrained unsteadiness of wheels acoustic radiation characteristic test device - Google Patents
A kind of Wheel Rail Contact state is detrained unsteadiness of wheels acoustic radiation characteristic test device Download PDFInfo
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- CN206618489U CN206618489U CN201621113076.6U CN201621113076U CN206618489U CN 206618489 U CN206618489 U CN 206618489U CN 201621113076 U CN201621113076 U CN 201621113076U CN 206618489 U CN206618489 U CN 206618489U
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Abstract
The utility model is related to a kind of Wheel Rail Contact state and detrained unsteadiness of wheels acoustic radiation characteristic test device, including cast iron table top, rail, falling sphere slideway exciting bank, cast iron table top is provided with the augmentor that will be pressurizeed between train wheel and rail, vibrating sensor is disposed with train wheel, cast iron table top planar outboard is covered with microphone arrangement support, microphone arrangement support and is disposed with microphone.The beneficial effects of the utility model are：Train wheel is pressed in the situation on rail in the presence of very big axle weight in practice for simulation, measure vibration characteristics harmony radiation characteristic of the wheel under Wheel Rail Contact state, and do not limited by wheel as point sound source, researcher is helped deeply to probe into the mechanism of action of unsteadiness of wheels acoustic radiation, its acoustic radiation level of quantitative analysis.
Description
Technical field
The utility model belongs to the NVH testing fields of rail traffic vehicles industry, is related under a kind of Wheel Rail Contact state fiery
Car unsteadiness of wheels acoustic radiation characteristic test device.
Background technology
According to domestic and international railroad noise test experience, Wheel/rail noise be due to wheel track surface roughness excite wheel,
Rail and concrete sleeper vibration, and outwards propagated and produced by surrounding air, it is one of main source of railroad noise, sternly
Rolling stock riding comfort and Along Railway sound field environment are affected again.And in wheel-rail noise, the radiation from wheel is made an uproar
Sound occupies sizable proportion.The test of vibration acoustic radiation characteristic under Wheel Rail Contact state is carried out to wheel, can be in ideal
Under environment to greatest extent simulation train wheel is pressed in situation on rail in the presence of very big axle weight in practice, and help
Researcher deeply probes into the mechanism of action of unsteadiness of wheels acoustic radiation, its acoustic radiation level of quantitative analysis, and then can be with specific aim
Ground proposes vibration and noise reducing behave.
《ISO 3745：2003》The specific method of half noise elimination method measuring sound source acoustical power is given, but wherein requires sound source
Size need to be much smaller than testing hemispherical radius.For this sound source of railway wheel, its volume is larger, if being used as a sound
Source is handled, then needs to be tested in very big semianechoic room, very harsh to environmental requirement, difficulty is larger, and
Experimentation cost has been significantly greatly increased.In addition, there is no the method for proposing measuring sound source vibration in standard.
Research railway wheel vibration acoustic radiation characteristic most common method is finite element stimulation at present, and when wheel
When shape, material are various and complicated, simulation calculation will become very difficult, and accuracy is substantially reduced；Further, nothing
By any simulation calculation, its reliability and confidence level are not as good as actual measurement data.
Utility model content
The technical problems to be solved in the utility model is：Detrained based on above mentioned problem there is provided a kind of Wheel Rail Contact state
Unsteadiness of wheels acoustic radiation characteristic test device.
The utility model solves the technical scheme that its technical problem used：A kind of Wheel Rail Contact state is detrained wheel
Vibration acoustic radiation characteristic test device, including cast iron table top, be installed on cast iron table top center be used for put off train wheel rail,
It is respectively arranged in the radial direction falling sphere slideway exciting bank with controllable steel ball on train wheel front and side cast iron table top
With axial falling sphere slideway exciting bank, train wheel is set up by axletree and put off on rail, and axletree two ends are arranged with it
The pulley supporting rod device of cast iron table top is fixed on, axletree and cast iron table top were provided with adding for being pressurizeed between train wheel and rail
Power apparatus；Radial direction falling sphere slideway exciting bank is laid on the front that train wheel radially encourages point, axial falling sphere slideway excitation
Device is laid on the front of train wheel axial excitation point, radial direction falling sphere slideway exciting bank and axial falling sphere slideway excitation dress
The steel ball put impacts radially excitation point respectively and axial excitation point produces train wheel vibration and sound radiation；Arranged on train wheel
There are a tread vibrating sensor and two disc vibrating sensors, cast iron table top planar outboard is covered with hemisphere face shape microphone
Arrange on support, microphone arrangement support and be disposed with the microphone that train wheel core wheel is pointed in 20 directions.
Further, radial direction falling sphere slideway exciting bank is identical with the structure of axial falling sphere slideway exciting bank, includes
For be fixed on cast iron table top slideway base, be installed on above slideway base with the vertically disposed slideway branch of slideway base
Offered on seat, the falling sphere slideway being fixed on slideway support, slideway support for falling sphere slideway in the vertical direction height adjustable
Chute, falling sphere slideway includes the outlet section of level positioned at lower end, the inclined descending brancies of 45 ゜ positioned at upper end and connects out
The arc transition of mouth section and descending branch, in obtuse angle, descending branch top is provided with and holds steel ball angle between outlet section and descending branch
Electromagnet.
Further, the outlet of falling sphere slide egress section is just radially encouraging point and axial excitation point to train wheel respectively.
The cross section of falling sphere slideway is V-type, and road wall is smooth；Slideway support bottom surface corner is welded with magnet square, can firmly adsorb
On cast iron table top；Falling sphere slideway top, which has, produces magnetic after electromagnet, energization, adsorbable steel ball.
Further, train wheel is on rail during rolling-operation, and all rolling contact points constitute a circle, is referred to as
Nominal rolling circle；Train wheel, which includes symmetrical left half wheel and right half, takes turns, and radially excitation point is located at where left half wheel horizontal radius
Plane and the intersection point of nominal rolling circle, symmetrical on core wheel with tread vibrating sensor site, axial excitation point, which is located at left half, takes turns
Inner surface at the 5cm of wheel rim top, two disc vibrating sensors are evenly arranged in the disc of train wheel lateral surface
On.
Further, the reference of layouting of 20 microphones《ISO 3745-2003》In on semianechoic room sound source radiation
20 hemisphere face points distributing methods arrangement in acoustical power method of testing.The radius of microphone arrangement frame is 2m, using aluminum alloy round
Pipe is made.
Further, steel ball uses the bearing steel ball of 2.5cm diameters, radially excitation point and the cast iron below axial excitation point
Equal bedding prevents the cotton of secondary noise on table top.
Further, test device also includes computer, number milling machine case, manual power switch, computer, number milling machine case,
Microphone and vibrating sensor, constitute data collecting system；The electromagnet on falling sphere slideway exciting bank top is connected to manual electricity
Source switch, constitutes falling sphere excitation control system.
Further, pulley supporting rod device includes cylindricality straight-bar and is fixed on the fixed pulley of cylindricality straight-bar bottom inside, car
Axle both ends symmetrically offer through hole, and the upper end of cylindricality straight-bar is arranged in through hole, and cylindricality straight-bar lower end is perpendicularly fixed at cast iron
On table top.
Further, it is in holding for straight line connection successively by steel wire rope that augmentor, which is included being installed on cast iron table top,
Power bearing, chain block and tension tester, the outside of tension tester pass through steel wire penetrating fixed pulley and steel wire rope end
The circle at end is sheathed on axletree surface, and augmentor has two sets, is set in parallel in train wheel both sides, the pine of rotation chain block
Tight bar, realizes the reinforcing operation between train wheel and rail.
The underrun fastening foundation bolt of rail is on cast iron table top, and its rail level is parallel with cast iron table top；Train wheel
By the way that an axletree is through wheel bore and puts off on rail rail level, and plane where the nominal rolling circle of train wheel is perpendicular to steel
Rail rail level；The cylindricality straight-bar of two sets of pulley supporting rod devices is passed through to the manhole at axletree two ends, carrousel from bottom to top respectively
Axle simultaneously adjusts post position, it is ensured that cylindricality straight-bar is locked in cast iron perpendicular to cast iron table top, and by pulley supporting rod device
On platform, cylindricality straight-bar can play a part of support and leveling wheel, increase security.Respectively by wherein the one of two steel wire ropes
End breaks into circle, and the one end for having circle is respectively fitted over into the two ends of axletree, and the steel wire rope other end then is bypassed into pulley pole
After the fixed pulley of bottom of device, it is connected with tension tester；Then, by the activity of the other end of tension tester and chain block
Hook is linked；Finally, the stay hook of chain block is stuck on load bearing；The elastic bar of two chain blocks is rotated, will be pulled
Cucurbit is gradually tensed, while observing the registration on two tension testers, after two registrations reach 2.5 tons, locking is pulled
Cucurbit.So far, reinforcing operation of the train wheel on rail is completed.It should be noted that for the sake of security, in afterburner process
In, two chain blocks synchronous should be reinforced slowly, it is ensured that the stationarity of wheel.
A kind of Wheel Rail Contact state is detrained the method for testing of unsteadiness of wheels acoustic radiation characteristic test device, including following step
Suddenly：
(1) test device as claimed in claim 1 is assembled；
(2) augmentor is adjusted, reinforcing operation of the train wheel on rail is realized；
(3) connecting test system；
(4) the steel ball impact of radial direction falling sphere slideway exciting bank radially encourages point and axial excitation point to produce train wheel and shaken
Dynamic and acoustic radiation, the steel ball impact axial excitation point and axial excitation point of axial falling sphere slideway exciting bank produce train wheel and shaken
Dynamic and acoustic radiation, collection acoustical signal and vibration signal；
(5) the vibration acoustic radiation characteristic of the train wheel under analysis Wheel Rail Contact state is calculated.
Specific testing procedure is as follows：
(1) by one section of rail by fastening foundation bolt on the cast iron platform on semianechoic room ground；
(2) train wheel is pressed on rail rail level with 5 tons of pressure by a set of augmentor, train wheel name rolling
Plane is perpendicular to rail level where dynamic circle；
(3) normative reference《ISO 3745-2003》, according to radius 2m hemisphere face microphone points distributing method, make hemisphere
Face microphone arrangement support, and the accurate cloth set-point for marking out 20 microphones on support, install microphone additional at site
Fixture；
(4) wheel is divided into symmetrical left half wheel and right half and taken turns by the diameter perpendicular through core wheel, and vibrating sensor is in test
In use 3, position is layouted in the horizontal radius plane of right half wheel, wherein 1 is located at the plane and is rolled with wheel name
Round intersection point, 2 are evenly arranged on the disc in lateral wheel face in addition；
(5) microphone is fixed on the hemisphere face support of envelope wheel by fixture, and core wheel is pointed in the direction of microphone；
Vibrating sensor is tightly pasted onto on wheel with 502 glue or AB glue, and vibration-testing direction is perpendicular to wheel surface；
(6) generation of unsteadiness of wheels and acoustic radiation uses falling sphere energisation mode, wherein, falling sphere energisation mode is divided into radially again
Excitation and axial excitation；Radially excitation is the excitation side produced by being collided during simulating wheel straight-line rolling is travelled with rail
Formula, and axial excitation is simulating wheel its rim section and energisation mode produced by rail collision when crossing curve；Radially swash
Encourage plane and the intersection point of nominal rolling circle where being a little located at left half wheel horizontal radius, with tread vibrating sensor paste site on
Core wheel is symmetrical；Axial excitation point is located at the inner surface of left half wheel at the 5cm of wheel rim top；
(7) 2 falling sphere slideway exciting banks are laid on immediately ahead of radially excitation point and axial excitation point respectively, and adjusted
Slideway height and orientation, until steel ball is from after flying out slide egress, radial direction excitation point and axial excitation of the vertical impact in wheel
Point on；Steel ball uses the bearing steel ball of 2.5cm diameters；Bedding cotton below point is encouraged at two, it is desirable to which steel ball impacts car respectively
After wheel, under drop down onto on cotton, no longer produce secondary noise；
(8) connection computer, number milling machine case and all the sensors, constitute data collecting system；By 2 falling sphere slideway tops
Electromagnet be connected to manual power switch, constitute falling sphere excitation control system；
(9) by taking radial direction exciting test process as an example, a complete test process is：Before data acquisition, falling sphere is first opened
The electromagnet power supply on slideway top, makes electromagnet produce after magnetic, and by steel ball absorption on electromagnet, all personnel, which withdraws from, partly to disappear
Sound chamber；After data acquisition starts, without any action in the preceding several seconds, collection ambient noise and vibration information after the several seconds, are closed radially
Falling sphere slideway electromagnet power supply, make steel ball lose magnetism absorption after slided from slideway and hit radially excitation point, produce vibration and
Noise, waits vibration and noise to recover to former background level, stops collection, that is, obtains one group and include 20 acoustical signals and 3
The entire time domain data of individual vibration signal；
(10) it is the repeatability of evaluation test, the overall sound pressure level measured in test process using No. 14 microphone is made
For monitoring object；Every time after test, the sound pressure level peak value that the microphone is measured in this test process is recorded；Radially swash
Encouraging test need to be carried out 6 times, obtain 6 groups of time domain datas, and have recorded 6 corresponding peak values, remove in 6 peak values maximum and most
Time domain data corresponding to small value, is left 4 groups of time domain datas and is used as valid data for post processing；Axial excitation test is also needed
Carry out 6 times, obtain 6 groups of time domain datas, and have recorded 6 corresponding peak values, remove maximum and minimum value institute in 6 peak values right
The time domain data answered, is left 4 groups of time domain datas and is used as valid data for post processing；
(11) measured respectively using barometer and thermometer and record the atmospheric pressure in semianechoic room and atmospheric temperature；
(12) with one group of complete waving map data instance, it can refer to《ISO 3745-2003》In half noise elimination that provides
The calculation formula of room sound source radiation acoustic energy magnitude, obtain 20 acoustical signal data are calculated, and obtain wheel global radiation sound
The value of energy level；Meanwhile, the value of totally 3 vibrating sensor vibration level is also obtained on wheel web and tread in test process,
It can recognize that the vibration characteristics of 3 wheel sensitizing ranges.According to the step, 4 groups obtained before handling respectively radially survey by excitation
Try data and 4 groups of axial excitation test datas.4 groups of radial direction exciting test results are done sums average, obtained under radially encouraging
Unsteadiness of wheels acoustic radiation characteristic；4 groups of axial excitation test results are done sums average, obtain the unsteadiness of wheels under axial excitation
Acoustic radiation characteristic.
The beneficial effects of the utility model are：Vibration acoustic radiation characteristic test side under a kind of train wheel Wheel Rail Contact state
Method and device, can to greatest extent simulation train wheel is pressed in feelings on rail in the presence of very big axle weight in practice
Shape, and relatively accurately vibration characteristics harmony radiation characteristic of the measurement wheel under Wheel Rail Contact state, and not by wheel conduct
The limitation of point sound source, can help researcher deeply to probe into the mechanism of action of unsteadiness of wheels acoustic radiation, its acoustically radiating of quantitative analysis
Jetting is put down, and then pointedly proposes vibration and noise reducing behave.
Brief description of the drawings
The utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of test device of the present utility model；
Fig. 2 is the structural representation of pulley supporting rod device；
Fig. 3 is the structural representation of augmentor
Fig. 4 is the structural representation of falling sphere slideway exciting bank；
Fig. 5 is train wheel acoustic radiation point layout figure；
Fig. 6 is layout drawing of the train wheel vibration measuring point on the section of wheel 1/2；
Fig. 7 is the vibration level spectral characteristic figure for radially encouraging lower standard wheel tread and annular damper wheel tread；
Fig. 8 is annular damper wheel and standard wheel vibration acoustic radiation spectral characteristic figure；
Wherein：1. cast iron table top, 2. rail, 3. train wheels, 4. radial direction falling sphere slideway exciting banks, 5. axial falling spheres are slided
Road exciting bank, 6. axletrees, 7. pulley supporting rod devices, 8. augmentors, 9. tread vibrating sensors, 10. disc vibrating sensings
Device, 11. microphones arrangement support, 451. slideway bases, 452. slideway supports, 453. falling sphere slideways, 454. electromagnet, 71. posts
Shape straight-bar, 72. fixed pulleys, 81. steel wire ropes, 82. load bearings, 83. chain blocks, 84. tension testers.
Embodiment
The utility model is further described presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram only to show
Meaning mode illustrates basic structure of the present utility model, therefore it only shows the composition relevant with the utility model.
A kind of Wheel Rail Contact state as shown in figures 1 to 6 is detrained unsteadiness of wheels acoustic radiation characteristic test device, including casting
Iron table top 1, be installed on the center of cast iron table top 1 be used to putting off the rail 2 of train wheel 3, be respectively arranged in the front of train wheel 3 and
The radial direction falling sphere slideway exciting bank 4 and axial falling sphere slideway exciting bank with controllable steel ball on side cast iron table top 1
5, train wheel 3 sets up to put off by axletree 6 is fixed in cast iron table top 1 on rail 2, the two ends of axletree 6 are arranged with
Pulley supporting rod device 7, axletree 6 and cast iron table top 1 are provided with the augmentor 8 that will be pressurizeed between train wheel 3 and rail 2；Footpath
Train wheel 3, which is laid on, to falling sphere slideway exciting bank 4 radially encourages front a little, the axial cloth of falling sphere slideway exciting bank 5
It is put in the front of the axial excitation point of train wheel 3, radial direction falling sphere slideway exciting bank 4 and axial falling sphere slideway exciting bank 5
Steel ball impact respectively radially excitation point and axial excitation point produce the vibration and sound radiation of train wheel 3；Arranged on train wheel 3
There are a tread vibrating sensor 9 and two disc vibrating sensors 10, the planar outboard of cast iron table top 1 is covered with hemisphere face shape biography
Sound device, which is arranged on support 11, microphone arrangement support 11, is disposed with the microphone that the core wheel of train wheel 3 is pointed in 20 directions.
Radial direction falling sphere slideway exciting bank 4 is identical with the structure of axial falling sphere slideway exciting bank 5, including for fixing
Slideway base 451 on cast iron table top 1, be installed on the top of slideway base 451 with the vertically disposed slideway of slideway base 451
Offered on bearing 452, the falling sphere slideway 453 being fixed on slideway support 452, slideway support 452 for falling sphere slideway 453 perpendicular
The upward adjustable for height chute of Nogata, outlet section, 45 ゜ positioned at upper end that falling sphere slideway 453 includes the level positioned at lower end incline
Oblique descending branch and connection outlet section and descending branch arc transition, between outlet section and descending branch angle in obtuse angle, under
Drop section top is provided with the electromagnet 454 for holding steel ball.Just train wheel 3 is radially being encouraged respectively the outlet of falling sphere slide egress section
Point and axial excitation point.
Train wheel 3 is on rail 2 during rolling-operation, and all rolling contact points constitute a circle, is referred to as name rolling
Dynamic circle；Train wheel 3, which includes symmetrical left half wheel and right half, takes turns, plane where radially excitation point is located at left half wheel horizontal radius with
The intersection point of nominal rolling circle, symmetrical on core wheel with the site of tread vibrating sensor 9, axial excitation point is located at the inner side of left half wheel
At surface distance wheel rim top 5cm, two disc vibrating sensors 10 are evenly arranged on the disc of the lateral surface of train wheel 3.
The reference of layouting of 20 microphones《ISO 3745-2003》In on semianechoic room sound source radiation acoustical power test
20 hemisphere face points distributing methods arrangement in method, as shown in Figure 5.
Steel ball uses the bearing steel ball of 2.5cm diameters, radially encourages on the cast iron table top 1 below point and axial excitation point
Bedding prevents the cotton of secondary noise.
Test device also includes computer, number milling machine case, manual power switch, computer, number milling machine case, microphone and shakes
Dynamic sensor, constitutes data collecting system；The electromagnet on falling sphere slideway exciting bank top is connected to manual power switch, constitutes
Falling sphere encourages control system.
Pulley supporting rod device 7 includes cylindricality straight-bar 71 and is fixed on the fixed pulley 72 of the bottom inside of cylindricality straight-bar 71, axletree 6
Both ends symmetrically offer through hole, and the upper end of cylindricality straight-bar 71 is arranged in through hole, and cylindricality straight-bar 71 is perpendicularly fixed at cast iron platform
On face 1.
Augmentor 8 includes being installed on the load branch connected successively in a straight line by steel wire rope 81 on cast iron table top 1
Seat 82, chain block 83 and tension tester 84, the outside of tension tester 84 by steel wire rope 81 through fixed pulley 72 and
The circle of the end of steel wire rope 81 is sheathed on the surface of axletree 6, and augmentor 8 has two sets, is set in parallel in the both sides of train wheel 3, rotation
Turn the elastic bar of chain block 83, realize the reinforcing operation between train wheel 3 and rail 2.
A kind of Wheel Rail Contact state is detrained the method for testing of unsteadiness of wheels acoustic radiation characteristic test device, including following step
Suddenly：
(1) test device as claimed in claim 1 is assembled；
(2) augmentor is adjusted, reinforcing operation of the train wheel on rail is realized；
(3) connecting test system；
(4) the steel ball impact of radial direction falling sphere slideway exciting bank radially encourages point and axial excitation point to produce train wheel and shaken
Dynamic and acoustic radiation, the steel ball impact axial excitation point and axial excitation point of axial falling sphere slideway exciting bank produce train wheel and shaken
Dynamic and acoustic radiation, collection acoustical signal and vibration signal；
(5) the vibration acoustic radiation characteristic of the train wheel under analysis Wheel Rail Contact state is calculated.
It should simultaneously be measured in test process and record the atmospheric pressure β in semianechoic room and atmospheric temperature θ.
The vibration DBMS on the surface of train wheel 3 can be directly measured using vibrating sensor；The calculating of acoustic radiation characteristic by
Following calculation procedure is obtained：
First, measurement atmospheric pressure the correction factor C1 and C2 relevant with temperature can be obtained according to following formula, wherein, β in formula0For
Referenmce atomsphere pressure.
Then, hemispherical surface sound level L is testedpfIt can be obtained by following formula, wherein, LPi(i=1,2 ... 20) are each
Sound pressure level measured by microphone.
Finally, the radiated level of sound source can be obtained according to following formula, wherein S2For test hemisphere face surface area.
Using the test device and method proposed in this patent, to certain annular damper wheel and its corresponding standard wheel
The test of vibration acoustic radiation characteristic under Wheel Rail Contact state is carried out, two kinds of wheels can be obtained and swashed respectively in radial direction excitation and axial direction
The test result of vibration and acoustic radiation characteristic under encouraging, and the test result of two wheels can further be contrasted, it is somebody's turn to do
Effect of vibration and noise reduction of the annular damper wheel under Wheel Rail Contact Afterburning condition.Exemplified by radially testing, available result
Table 1, Fig. 7, table 2 and Fig. 8 show that table 1 is given under radially excitation, the vibration level total value of standard wheel and ring-like damping wheel, and
Give the effectiveness in vibration suppression of annular damper wheel；Fig. 7, which gives, radially encourages lower standard wheel tread and annular damper wheel pedal
The vibration level spectral characteristic in face；Table 2 is given under radially excitation, standard wheel and the global radiation acoustical power of annular damper wheel
Value, and give the noise reduction of annular damper wheel；Fig. 8 gives annular damper wheel and standard wheel vibration acoustic radiation frequency
Spectral property.
Table 1 radially encourages lower wheel vibration level test result
Table 2 radially encourages wheel radiated test result of getting off
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people
Member can carry out various changes and amendments in the range of without departing from this utility model technological thought completely.This reality
The content on specification is not limited to new technical scope, it is necessary to its technology is determined according to right
Property scope.
Claims (9)
- The unsteadiness of wheels acoustic radiation characteristic test device 1. a kind of Wheel Rail Contact state is detrained, it is characterized in that：Including cast iron table top, Being installed on cast iron table top center is used to put off the rail of train wheel, is respectively arranged in train wheel front and side cast iron table top On the radial direction falling sphere slideway exciting bank and axial falling sphere slideway exciting bank with controllable steel ball, train wheel passes through car Pedestal, which is set, to be put off on rail, and axletree two ends are arranged with the pulley supporting rod device for being fixed in cast iron table top, axletree and casting Iron table top is provided with the augmentor that will be pressurizeed between train wheel and rail；Radial direction falling sphere slideway exciting bank is laid on train Wheel radially encourages the front of point, and axial falling sphere slideway exciting bank is laid on the front of train wheel axial excitation point, The steel ball of radial direction falling sphere slideway exciting bank and axial falling sphere slideway exciting bank impacts radially excitation point and axial excitation respectively Point generation train wheel vibration and sound radiation；A tread vibrating sensor is disposed with train wheel and two disc vibrations are passed Sensor, cast iron table top planar outboard is covered with hemisphere face shape microphone arrangement support, microphone arrangement support and is disposed with 20 Point to the microphone of train wheel core wheel in individual direction.
- The unsteadiness of wheels acoustic radiation characteristic test device 2. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：Described radial direction falling sphere slideway exciting bank is identical with the structure of axial falling sphere slideway exciting bank, including for The slideway base that is fixed on cast iron table top, be installed on above slideway base with the vertically disposed slideway support of slideway base, It is fixed on the falling sphere slideway on slideway support, slideway support and offers for the adjustable for height cunning of falling sphere slideway in the vertical direction Groove, falling sphere slideway includes the outlet section of the level positioned at lower end, the inclined descending brancies of 45 ゜ and the connection outlet section positioned at upper end With the arc transition of descending branch, in obtuse angle, descending branch top is provided with the electricity for holding steel ball to angle between outlet section and descending branch Magnet.
- The unsteadiness of wheels acoustic radiation characteristic test device 3. a kind of Wheel Rail Contact state according to claim 2 is detrained, its It is characterized in：Point and axial excitation point are radially just being encouraged to train wheel respectively in the outlet of described falling sphere slide egress section.
- The unsteadiness of wheels acoustic radiation characteristic test device 4. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：Described train wheel is on rail during rolling-operation, and all rolling contact points constitute a circle, is referred to as name Rolling circle；Train wheel, which includes symmetrical left half wheel and right half, takes turns, and radially excitation point is located at plane where left half wheel horizontal radius With the intersection point of nominal rolling circle, symmetrical on core wheel with tread vibrating sensor site, axial excitation point is located at the interior of left half wheel Side surface is at the 5cm of wheel rim top, and two disc vibrating sensors are evenly arranged on the disc of train wheel lateral surface.
- The unsteadiness of wheels acoustic radiation characteristic test device 5. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：The reference of layouting of 20 described microphones《ISO 3745-2003》In on semianechoic room sound source radiation sound work( 20 hemisphere face points distributing methods arrangement in rate method of testing.
- The unsteadiness of wheels acoustic radiation characteristic test device 6. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：Described steel ball uses the bearing steel ball of 2.5cm diameters, radially excitation point and the cast iron table top below axial excitation point Upper equal bedding prevents the cotton of secondary noise.
- The unsteadiness of wheels acoustic radiation characteristic test device 7. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：Described test device also includes computer, number milling machine case, manual power switch, computer, number milling machine case, transaudient Device and vibrating sensor, constitute data collecting system；The electromagnet on falling sphere slideway exciting bank top is connected to manual power and opened Close, constitute falling sphere excitation control system.
- The unsteadiness of wheels acoustic radiation characteristic test device 8. a kind of Wheel Rail Contact state according to claim 1 is detrained, its It is characterized in：Described pulley supporting rod device includes cylindricality straight-bar and is fixed on the fixed pulley of cylindricality straight-bar bottom inside, axletree two End symmetric offers through hole, and the upper end of cylindricality straight-bar is arranged in through hole, and cylindricality straight-bar lower end is perpendicularly fixed at cast iron table top On.
- The unsteadiness of wheels acoustic radiation characteristic test device 9. a kind of Wheel Rail Contact state according to claim 8 is detrained, its It is characterized in：Described augmentor includes being installed on the load branch connected successively in a straight line by steel wire rope on cast iron table top Seat, chain block and tension tester, the outside of tension tester pass through steel wire penetrating fixed pulley and steel cord ends Circle is sheathed on axletree surface, and augmentor has two sets, is set in parallel in train wheel both sides, rotation chain block it is elastic Bar, realizes the reinforcing operation between train wheel and rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621113076.6U CN206618489U (en) | 2016-10-11 | 2016-10-11 | A kind of Wheel Rail Contact state is detrained unsteadiness of wheels acoustic radiation characteristic test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621113076.6U CN206618489U (en) | 2016-10-11 | 2016-10-11 | A kind of Wheel Rail Contact state is detrained unsteadiness of wheels acoustic radiation characteristic test device |
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| Publication Number | Publication Date |
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| CN206618489U true CN206618489U (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621113076.6U Expired - Fee Related CN206618489U (en) | 2016-10-11 | 2016-10-11 | A kind of Wheel Rail Contact state is detrained unsteadiness of wheels acoustic radiation characteristic test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332849A (en) * | 2018-04-24 | 2018-07-27 | 浙江大学昆山创新中心 | A kind of electro spindle dynamic load vibration test system and test method |
-
2016
- 2016-10-11 CN CN201621113076.6U patent/CN206618489U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332849A (en) * | 2018-04-24 | 2018-07-27 | 浙江大学昆山创新中心 | A kind of electro spindle dynamic load vibration test system and test method |
| CN108332849B (en) * | 2018-04-24 | 2024-04-19 | 浙江大学昆山创新中心 | Dynamic loading vibration testing system and testing method for electric spindle |
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