CN107024381A - A kind of sinusoidal displacement excitation loading device and test equipment - Google Patents
A kind of sinusoidal displacement excitation loading device and test equipment Download PDFInfo
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- CN107024381A CN107024381A CN201710407131.5A CN201710407131A CN107024381A CN 107024381 A CN107024381 A CN 107024381A CN 201710407131 A CN201710407131 A CN 201710407131A CN 107024381 A CN107024381 A CN 107024381A
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- cam
- wheel shaft
- loading device
- power set
- power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
Abstract
The present invention relates to a kind of sinusoidal displacement excitation loading device and test equipment, belong to material mechanical performance testing field.Sinusoidal displacement excitation loading device includes：Support frame, power set, transmission device and charging assembly, the power set and the charging assembly are mounted on support frame as described above, and the charging assembly includes：Wheel shaft and cam set, the cam set include：First cam, first cam is arranged on the wheel shaft, and first cam is detachably connected with the wheel shaft, and the power set are connected by the transmission device with the wheel shaft.Under the drive of transmission device, the power of the power set can be delivered on the wheel shaft in the charging assembly, to realize the synchronous axial system of the wheel shaft and the power set, so that the rotation of the wheel shaft is converted into vertical motion by first cam, and then produce a sinusoidal load excitation.
Description
Technical field
The invention belongs to material mechanical performance testing field, and in particular to a kind of sinusoidal displacement excitation loading device and test
Equipment.
Background technology
With developing rapidly for national economy and widely using for high speed machine, vibration and the pollution of noise are increasingly serious,
Application of the visco-elastic damping material in vibration and noise reducing field using rubber shock absorber as representative is more and more extensive.Its power performance is
The call parameter of design of vibration isolator, operation stability, vibration isolator performance to mechanical system, which are played, has important influence.Cause
This, wants to design the vibration isolator of superior performance, it is necessary first to which the power performance to visco-elastic damping material is tested.
In terms of the test of visco-elastic damping material power performance, most common method is to force non-resonance method.Generally will
The sample of certain specification is made in visco-elastic damping material, is held in measuring system, is tested using sinusoidal excitation, make its by
Compel vibration, produce corresponding deformation, measure the stress being applied on sample and displacement periodic amplitude and the phase between them
Angle, then goes out the power property arguments of material according to these measured parameter value calculations.Instrument used is various types of
Dynamic Mechanical Analyzer.Due to being confined in the range of linear small strain mechanical analyzer more, pass through mechanical analyzer experiment and obtain
Small strain in the range of visco-elastic damping material power performance result and visco-elastic damping material power performance in big strained situation
The power performance gap of lower performance is larger, or even can not test visco-elastic damping material power performance moving under big strained situation
Power performance.Therefore, a kind of visco-elastic damping material power performance test equipment for meeting engineer applied needs is needed badly, it is existing to overcome
The defect such as loading excitation whard to control, stability difference when having test equipment test.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of sinusoidal displacement excitation loading device sinusoidal displacement excitation loading dress
Put and test equipment, effectively to improve above mentioned problem.
What embodiments of the invention were realized in：
Include the embodiments of the invention provide a kind of sinusoidal displacement excitation loading device：Support frame, power set, transmission dress
Put and charging assembly.The power set and the charging assembly are mounted on support frame as described above.The charging assembly includes：
Wheel shaft and cam set, the cam set include：First cam.First cam is arranged on the wheel shaft, and described first is convex
Wheel is detachably connected with the wheel shaft.The power set are connected by the transmission device with the wheel shaft, the transmission dress
Put the wheel shaft for the power of the power set being delivered in the charging assembly, so that the cam will be described
The rotation of wheel shaft is converted into vertical motion.
In preferred embodiments of the present invention, the cam set also includes：Second cam and the 3rd cam, described second is convex
Wheel and the 3rd cam are detachably connected with the wheel shaft, in use, first cam, second cam and described
Any one cam in 3rd cam is arranged on the wheel shaft.
In preferred embodiments of the present invention, the sinusoidal displacement excitation loading device also includes：Frequency converter, the frequency conversion
Device is coupled with the power set, the output speed for controlling the power set.
In preferred embodiments of the present invention, the sinusoidal displacement excitation loading device also includes：Acting device, the work
Dynamic device includes：Start head and power transmission pressing plate, the power transmission pressing plate are connected with start head, and the power transmission pressing plate passes through spring
Component is connected with support frame as described above, the power transmission pressing plate and first cam contact, in the presence of first cam, institute
Stating power transmission pressing plate can be vertically movable.
In preferred embodiments of the present invention, support frame as described above includes：Base, top plate and support member, the base pass through
The support member is connected with the top plate, and the power set are installed on the base, and the charging assembly is installed on described
On top plate.
In preferred embodiments of the present invention, the support member includes：First supporting plate and the second supporting plate, described first
One end of supporting plate is connected with the base, and the other end of first supporting plate is connected with the top plate, second support
One end of plate is connected with the base, and the other end of second supporting plate is connected with the top plate.
In preferred embodiments of the present invention, the transmission device is timing belt.
In preferred embodiments of the present invention, the power set include：Motor, the motor is threephase asynchronous machine.
The embodiment of the present invention, which additionally provides a kind of test equipment, to be included：Including：Controller and above-mentioned sinusoidal displacement excitation
Loading device, the controller encourages the power set in loading device to couple with the sinusoidal displacement, described dynamic for controlling
Power apparatus is rotated, so that the rotation of the wheel shaft is converted into vertical motion by the cam.
In preferred embodiments of the present invention, the test equipment also includes：Control terminal, the control terminal with it is described
Controller is coupled.
The embodiments of the invention provide a kind of sinusoidal displacement excitation loading device and test equipment.Compared with prior art,
Sinusoidal displacement excitation loading device includes：Support frame, power set, transmission device and charging assembly.Wherein, the loading group
Part includes：Wheel shaft and cam set, the cam set include the first cam., can be by the power under the drive of transmission device
The power of device is delivered on the wheel shaft in the charging assembly, to realize that the wheel shaft is synchronous with the power set
Rotate, so that the rotation of the wheel shaft is converted into vertical motion by first cam, and then produce a sinusoidal displacement loading
Excitation.By controlling the power output of power set, the forcing frequency of the excitation just can be changed.Solve prior art generation
Sinusoidal force excitation it is whard to control, and its loading frequency is the problem of can not meet the demand of test.In addition, the present invention also has
It is standby：Simple in construction, easy to adjust, effect is good, cost is low, influenceed smaller, strong applicability etc. many excellent by artificial subjective factor
Point.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that or being understood by implementing the embodiment of the present invention.The purpose of the present invention and other advantages can be by being write
Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.By shown in accompanying drawing, above and other purpose of the invention, feature and advantage will become apparent from.In whole
Identical reference indicates identical part in accompanying drawing.Deliberately accompanying drawing, emphasis are not drawn by actual size equal proportion scaling
It is the purport for showing the present invention.
Fig. 1 shows that a kind of structure at the first visual angle of sinusoidal displacement excitation loading device provided in an embodiment of the present invention is shown
It is intended to.
Fig. 2 shows that a kind of structure at the second visual angle of sinusoidal displacement excitation loading device provided in an embodiment of the present invention is shown
It is intended to.
Fig. 3 shows the profile schematic diagram of the cam set in Fig. 1 provided in an embodiment of the present invention.
Fig. 4 shows a kind of structured flowchart of test equipment provided in an embodiment of the present invention.
Icon：10- sinusoidal displacements encourage loading device；11- support frames；111- bases；112- top plates；113- branch
Support member；The supporting plates of 114- first；The supporting plates of 115- second；13- power set；15- transmission devices；17- charging assemblies；
171- wheel shafts；172- cam sets；The cams of 173- first；The cams of 174- second；The cams of 175- the 3rd；18- frequency converters；
19- acting devices；191- power transmission pressing plates；192- start heads；193- spring assemblies；30- test equipments；31- controllers；
33- control terminals.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " interior ",
The orientation or position relationship of instructions such as " outer " are that or the invention product is used based on orientation shown in the drawings or position relationship
When the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, rather than indicate or imply
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of invention.In addition, term " first ", " second " are only used for distinguishing description, and it is not intended that indicating or implying relatively heavy
The property wanted.
In the description of the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection ", " coupling " should be interpreted broadly, for example, it may be being fixedly connected or detachably connecting
Connect, or be integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, middle matchmaker can also be passed through
Jie is indirectly connected to, and can be the connection of two element internals.For the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
Loading device 10 is encouraged the embodiments of the invention provide a kind of sinusoidal displacement, Fig. 1 and Fig. 2 is referred to.The sinusoidal position
Moving excitation loading device 10 includes：Support frame 11, power set 13, transmission device 15 and charging assembly 17.
Support frame as described above 11 is used for rigidly-fixed power plant 13, transmission device 15 and charging assembly 17.That is, described power set
13 and the charging assembly 17 be mounted on support frame as described above 11, the power set 13 and the charging assembly 17 pass through institute
Transmission device 15 is stated to connect.In the present embodiment, it is preferable that support frame as described above 11 includes：Base 111, top plate 112 and support member
113。
The shape of the base 111 can have a variety of, for example, it may be circular or rectangle, can also be three
It is angular etc..In the present embodiment, it is preferable that the shape of the base 111 can be rectangle.Preferably, the base 111
Material can be metal material, can be with for example, it may be made up or be made up of steel material of ferrous material
It is made of alloy, such as being made up of stainless steel.
The base 111 is connected with the top plate 112 by the support member 113.Wherein, the base 111 with it is described
The mode of the connection of support member 113 can have a variety of, for example, it may be being connected by middleware, for example, the middleware is：Spiral shell
Female and screw rod, screw etc.；Can also be connected by modes such as bonding, welding, can also be and connected by combination, example
Such as, it is connected by combinations such as groove and projections；Also either it is integrally formed.In the present embodiment, it is preferable that the bottom
Seat 111 is connected with the support member 113 by middleware.
The support member 113 is used to fix the top plate 112, i.e. one end of the support member 113 and the base 111
Connection, the other end of the support member 113 is connected with the top plate 112, so that top plate 112 be fixed.In the present embodiment,
Preferably, the support member 113 includes：First supporting plate 114 and the second supporting plate 115.
One end of first supporting plate 114 is connected with the base 111, the other end of first supporting plate 114 with
The top plate 112 is connected.The shape of first supporting plate 114 can have a variety of, in the present embodiment, it is preferable that described
The shape of one supporting plate 114 can be rectangle.Preferably, the material of first supporting plate 114 can be metal material, example
Such as, can be made up or be made up of steel material of ferrous material, can also be that alloy is made, such as by stainless steel
Material is made.
One end of second supporting plate 115 is connected with the base 111, the other end of second supporting plate 115 with
The top plate 112 is connected.The shape of second supporting plate 115 can have a variety of, in the present embodiment, it is preferable that described
The shape of two supporting plates 115 can be rectangle.Preferably, the material of second supporting plate 115 can be metal material, example
Such as, can be made up or be made up of steel material of ferrous material, can also be that alloy is made, such as by stainless steel
Material is made.
Wherein it is preferred to, one end of first supporting plate 114 is connected with one end of the base 111, first support
The other end of plate 114 is connected with one end of the top plate 112.One end of second supporting plate 115 is another with the base 111
End connection, the other end of second supporting plate 115 is connected with the other end of the top plate 112.Base 111, the first supporting plate
114th, the second supporting plate 115 and top plate 112 constitute a rectangle or trapezoidal etc..
The top plate 112 is connected with the base 111 by the support member 113.Wherein, the top plate 112 with it is described
The mode of the connection of support member 113 can have a variety of, in the present embodiment, it is preferable that the top plate 112 and the support member
113 are connected by middleware.Preferably, one end of the top plate 112 is connected with the first supporting plate 114, the top plate 112 it is another
One end is connected with second supporting plate 115.
The shape of the top plate 112 can have a variety of, for example, it may be circular or rectangle, can also be three
It is angular etc..In the present embodiment, it is preferable that the shape of the top plate 112 can be rectangle.Preferably, the top plate 112
Material can be metal material, can be with for example, it may be made up or be made up of steel material of ferrous material
It is made of alloy, such as being made up of stainless steel.
The power set 13 are installed on support frame as described above 11, it is preferable that the power set 13 are installed on the bottom
On seat 111.The power set 13 are connected with the charging assembly 17 by the transmission device 15, for making the loading group
Part 17 produces sinusoidal displacement excitation.In the present embodiment, it is preferable that the power set 13 include but is not limited to：Motor.Its
In, the motor can be the alternating current generator often used in the market.In the present embodiment, it is preferable that the motor is three-phase
Asynchronous machine.
Wherein, it should be appreciated that can optionally choose whether to use driver according to actual needs
Carry out drive circuit.Because the annexation between driver and motor belongs to common knowledge, here, not to from driver
In the case of, the annexation between driver and motor is illustrated.Therefore, the presence or absence of driver should not be understood as be pair
The limitation of the present invention.
The transmission device 15 is connected with the power set 13 and the charging assembly 17 respectively, for by the power
The power of device 13 is delivered on the charging assembly 17, so that the charging assembly 17 produces sinusoidal displacement excitation.The transmission
The structure of device 15 can have a variety of, for example, it may be timing belt or chain, can also be gear etc., in this implementation
In, it is preferable that the transmission device 15 can be timing belt.
The charging assembly 17 is installed on support frame as described above 11, it is preferable that the charging assembly 17 is installed on the top
On plate 112.The charging assembly 17 is connected with power set 13 by the transmission device 15, and the charging assembly 17 can root
The power exported according to the power set 13 produces a sinusoidal displacement excitation.It is further preferred that the charging assembly 17 includes：
Wheel shaft 171 and cam set 172.
The wheel shaft 171 is fixed on the top plate 112, is connected by the transmission device 15 with the power set 13
Connect, the wheel shaft 171 is under the drive of transmission device 15, it is possible to achieve the synchronous axial system with the motor.
The first cam 173 in the cam set 172 is arranged on the wheel shaft 171, under the drive of transmission device 15
The rotation of the wheel shaft 171 can be converted into vertical motion by first cam 173, be swashed so as to produce a sinusoidal displacement
Encourage.Wherein, the connected mode of first cam 173 and the wheel shaft 171 can have a variety of, it is preferable that first cam 173
It is detachably connected by the middleware such as screw rod and nut, screw and the wheel shaft 171, in order to change first cam 173.Its
In, for the demand for meeting test more likely, it is necessary to change the amplitude of sinusoidal displacement excitation, inventor has found that
The amplitude that change sinusoidal displacement is encouraged can be realized by changing the height of projection of cam, therefore, in the present embodiment, as shown in figure 3,
The cam set 172 at least includes the cam of three kinds of different structures, and respectively the first cam 173, the second cam 174 and the 3rd are convex
Wheel 175.According to actual use demand, in use, selectivity by first cam 173, second cam 174 and institute
One of cam in the 3rd cam 175 is stated to be arranged on the wheel shaft 171.For example, the first cam 173 is arranged at described
On wheel shaft 171.
In order to meet the testing requirement of the resilient sleeper-bearing power performance in big frequency range as far as possible, for example, 0-1000Hz
In the range of, it is preferable that the sinusoidal displacement excitation loading device 10 also includes：Frequency converter 18.The frequency converter 18 is moved with described
Power apparatus 13 is coupled, the output speed for controlling the power set 13, to realize the change to displacement excitation forcing frequency.
Wherein, when frequency converter 18 and threephase asynchronous machine are connected, it is preferable that directly by tri- terminals of U/V/W of frequency converter 18 with properly
The U/V/W terminals of motor that are connected respectively in order of wire.
Wherein, displacement excitation forcing frequency can also be changed to realize by way of lug boss is set on cam
Become, you can to control the output speed of threephase asynchronous machine by frequency converter 18, mutually tied with the number of change cam upper projecting portion
The mode command displacement excitation forcing frequency of conjunction, substantially increases dynamic load driving frequency scope, can be achieved in the range of 1000Hz
The test of resilient sleeper-bearing power performance.
Wherein, with the profile schematic diagram of the cam set 172 shown in Fig. 3 to the first cam 173, the second cam 174 and the 3rd
Cam 175 is illustrated.Wherein, the quantity for the lug boss being arranged on the first cam 173 is with being arranged on the second cam 174
The quantity of lug boss is identical, for example, the quantity of its lug boss is 1.The quantity for the lug boss being arranged on the 3rd cam 175 is with setting
The quantity for the lug boss being placed on the first cam 173 is different, for example, the quantity for the lug boss being arranged on the 3rd cam 175 is
5, it is preferable that 5 lug bosses are arranged on the 3rd cam 175 at equal intervals.When wherein, using the first cam 173, what it was produced swashs
The amplitude encouraged is 1mm；During using the second cam 174, the amplitude of its excitation produced is 2mm；During using three cams 175, its
The amplitude of the excitation of generation is 1mm.Wherein, the quantity of lug boss can change displacement excitation forcing frequency, and the projection of cam is high
Degree can change the amplitude of excitation.
When carrying out power performance test to visco-elastic damping material, in the present embodiment, the sinusoidal displacement excitation adds
Carry and put 10 and also include：Acting device 19.The acting device 19 includes：Start first 192 and power transmission pressing plate 191.
The power transmission pressing plate 191 is connected by spring assembly 193 with support frame as described above 11.Preferably, the power transmission pressing plate 191
It is fixed on by spring assembly 193 on top plate 112, to ensure that cam is in close contact with power transmission pressing plate 191, in the work of the cam
Under, the power transmission pressing plate 191 can be vertically movable.The shape of the power transmission pressing plate 191 can have a variety of, in the present embodiment,
Preferably, the power transmission pressing plate 191 is in " T " shape.Wherein it is preferred to, the spring assembly 193 can include one group of support
Spring or including two groups of support springs, can also be including support spring more than two.In the present embodiment, preferably
Ground, the spring assembly 193 includes two groups of support springs.Because power transmission pressing plate 191 is to be fixed on top plate by spring assembly 193
On 112, therefore spring assembly 193 is in compressive state, ensures that cam is in close contact with acting device 19 with this, that is, ensures convex
The vertical motion for rotating movable property life is consistent with the vertical motion of acting device 19.
The start first 192 is connected with the power transmission pressing plate 191, and the size of the start first 192 can have a variety of.
Wherein, the cam in above-mentioned is the abbreviation of the first cam 173, the second cam 174 or the 3rd cam 175.
The embodiment of the present invention additionally provides a kind of test equipment 30, as shown in Figure 4.The test equipment 30 includes：Controller
31st, control terminal 33 and above-mentioned sinusoidal displacement excitation loading device 10.
The controller 31 encourages the power set 13 in loading device 10 to couple with the sinusoidal displacement, for controlling
State power set 13 to rotate, so that the charging assembly 17 in sinusoidal displacement excitation loading device 10 produces sinusoidal displacement and swashed
Encourage.Preferably, the controller 31 is coupled with the motor in power set 13, rotating speed, steering and output for controlled motor
Power etc., for example, controlled motor rotate counterclockwise or turning clockwise, and then realizes the rotate counterclockwise or up time of wheel shaft 171
Pin rotates, so that the rotation of the wheel shaft 171 is converted into vertical motion by cam, so as to produce a sinusoidal displacement excitation.
Wherein, it is further preferred that the controller 31 is by controlling frequency converter 18 to export a-c cycle, and then three-phase is controlled
The rotating speed and power of asynchronous machine.In its connected mode, controller 31 passes through in PLC module and frequency converter 18 with frequency converter 18
RS485 communication interfaces are communicated, and Control on Communication is programmed using PLC.When the frequency converter 18 is with motor connection, directly by frequency converter
The U/V/W terminals for the motor that 18 tri- terminals of U/V/W are connected respectively in order with suitable wire.Wherein, preferably
Ground, the controller 31 is integrated with PLC control modules, and in order to control frequency converter 18 to export a-c cycle, and then control three is different
Walk the rotating speed and power of motor.
Wherein, the controller 31 can be a kind of IC chip, the disposal ability with signal.Above-mentioned control
Device 31 can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc.；Can also be digital signal processor (Digital Signal Processing,
DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate
Array (Field Programmable Gate Array, FPGA) or other PLDs, discrete gate or crystal
Pipe logical device, discrete hardware components.General processor can be microprocessor or the controller 31 can also be it is any often
Processor of rule etc..In the present embodiment, it is preferable that the controller 31 can be the processor of STM32 series, such as
The models such as STM32F103C8T6, STM32F103VET6.Preferably, the controller 31 reserves serial communication interface (i.e. com port).
The control terminal 33 is coupled with the controller 31, for controlling controller 31, with the rotating speed of controlled motor, is turned
To and power output etc., for example, the control terminal 33 sends control instruction to controller 31, with controlled motor counterclockwise or
Person turns clockwise.Wherein, the control terminal 33 includes but is not limited to：Computer.Preferably, the control terminal 33 passes through serial ports
Line is connected with controller 31, realizes the control to motor.
In summary, the embodiments of the invention provide a kind of sinusoidal displacement excitation loading device and test equipment.The sine
Displacement excitation loading device includes：Support frame, power set, transmission device, charging assembly, frequency converter and acting device.Wherein,
The support frame includes：Base, top plate, the first supporting plate and the second supporting plate.The charging assembly includes：Wheel shaft and cam set,
The cam set includes：First cam, the second cam and the 3rd cam., can be by the power under the drive of transmission device
The power of device is delivered on the wheel shaft in the charging assembly, to realize that the wheel shaft is synchronous with the power set
Rotate, so that the rotation of the wheel shaft is converted into vertical motion by first cam, and then produce a sinusoidal displacement excitation.
Secondly, by controlling frequency converter to export a-c cycle, and then the rotating speed and power of threephase asynchronous machine is controlled just to change this
The forcing frequency of displacement excitation.In addition, just can be changed by changing the number of cam upper projecting portion and the height of projection of cam
Variable displacement encourages the amplitude of forcing frequency and displacement excitation.Sinusoidal displacement excitation loading device solves prior art generation
Sinusoidal force excitation it is whard to control, and its loading frequency is the problem of can not meet the demand of test.In addition, the present invention also has
It is standby：Simple in construction, easy to adjust, effect is good, cost is low, influenceed smaller, strong applicability etc. many excellent by artificial subjective factor
Point.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of sinusoidal displacement encourages loading device, it is characterised in that including：Support frame, power set, transmission device and loading
Component, the power set and the charging assembly are mounted on support frame as described above, and the charging assembly includes：Wheel shaft and convex
Wheel group, the cam set includes：First cam, first cam is arranged on the wheel shaft, first cam with it is described
Wheel shaft is detachably connected, and the power set are connected by the transmission device with the wheel shaft, and the transmission device is used for will
The power of the power set is delivered on the wheel shaft in the charging assembly, so that first cam is by the wheel shaft
Rotation be converted into vertical motion.
2. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that the cam set also includes：The
Two cams and the 3rd cam, second cam and the 3rd cam are detachably connected with the wheel shaft, in use, described
Any one cam in first cam, second cam and the 3rd cam is arranged on the wheel shaft.
3. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that the sinusoidal displacement excitation loading
Device also includes：Frequency converter, the frequency converter is coupled with the power set, for controlling the output of the power set to turn
Speed.
4. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that the sinusoidal displacement excitation loading
Device also includes：Acting device, the acting device includes：Start head and power transmission pressing plate, the power transmission pressing plate and the start
Head connection, the power transmission pressing plate is connected by spring assembly with support frame as described above, and the power transmission pressing plate connects with first cam
Touch, in the presence of first cam, the power transmission pressing plate can be vertically movable.
5. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that support frame as described above includes：Base,
Top plate and support member, the base are connected by the support member with the top plate, and the power set are installed on the base
On, the charging assembly is installed on the top plate.
6. sinusoidal displacement according to claim 5 encourages loading device, it is characterised in that the support member includes：First
Supporting plate and the second supporting plate, one end of first supporting plate are connected with the base, the other end of first supporting plate
It is connected with the top plate, one end of second supporting plate is connected with the base, the other end of second supporting plate and institute
State top plate connection.
7. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that the transmission device is synchronous
Band.
8. sinusoidal displacement according to claim 1 encourages loading device, it is characterised in that the power set include：Electricity
Machine, the motor is threephase asynchronous machine.
9. a kind of test equipment, it is characterised in that including：Controller and the sinusoidal position as described in claim 1-8 any one
Excitation loading device is moved, the controller encourages the power set in loading device to couple with the sinusoidal displacement, for controlling
The power set are rotated, so that the rotation of the wheel shaft is converted into vertical motion by the cam.
10. test equipment according to claim 9, it is characterised in that the test equipment also includes：Control terminal, institute
Control terminal is stated to couple with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407131.5A CN107024381A (en) | 2017-06-02 | 2017-06-02 | A kind of sinusoidal displacement excitation loading device and test equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407131.5A CN107024381A (en) | 2017-06-02 | 2017-06-02 | A kind of sinusoidal displacement excitation loading device and test equipment |
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| Publication Number | Publication Date |
|---|---|
| CN107024381A true CN107024381A (en) | 2017-08-08 |
Family
ID=59529981
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710407131.5A Pending CN107024381A (en) | 2017-06-02 | 2017-06-02 | A kind of sinusoidal displacement excitation loading device and test equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023130554A1 (en) * | 2022-01-04 | 2023-07-13 | 苏州热工研究院有限公司 | Portable internal friction measuring apparatus and internal friction measurement method |
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