CN101949752B - Triaxial adaptive dynamic-balance execution device for centrifuger - Google Patents
Triaxial adaptive dynamic-balance execution device for centrifuger Download PDFInfo
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- CN101949752B CN101949752B CN2010102421350A CN201010242135A CN101949752B CN 101949752 B CN101949752 B CN 101949752B CN 2010102421350 A CN2010102421350 A CN 2010102421350A CN 201010242135 A CN201010242135 A CN 201010242135A CN 101949752 B CN101949752 B CN 101949752B
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Abstract
The invention discloses a triaxial adaptive dynamic-balance execution device for a centrifuger, which comprises a horizontal dynamic-balance execution unit, a vertical dynamic-balance execution unit and an execution controller for controlling the dynamic-balance execution units, wherein each dynamic-balance execution unit comprises a base fixed on a rotor, a guide rail fixed on the base, a sliding block in sliding connection with the guide rail, a drive mechanism for driving the sliding block to reciprocate along the guide rail, and a dynamic-balance mass block fixedly connected to the sliding block; a data acquisition device is arranged outside the rotor, acquires periodic vibration responses of the rotor caused by amounts of unbalance, and is connected with a processor; the processor can acquire the amplitude and phases of the vibration responses caused by different amounts of unbalance, and compute an initial amount of unbalance of the rotor and the travel directions and travel distances of each sliding block according to the amplitude and the phases; the drive mechanisms of each execution unit are controlled by the execution controller; and the processor communicates with the execution controller by using a wireless communication device. The triaxial adaptive dynamic-balance execution device has the advantages of direct arrangement on the rotor, capability of realizing adaptive dynamic-balance regulation when the mass distribution or rotating speed of the rotor is changed, and accurate control.
Description
Technical field
The present invention relates to a kind of tri-axial self-adaptive dynamic balance performs device of the rotor big for draw ratio.
Technical background
At present, dynamic balancing work to rotor is mostly completed on dynamic balancing machine, also some is to carry out spot dynamic balance to enter action balance to rotor using dynamic balance instrument, dynamically balanced species is broadly divided into single-side dynamic balance and dual-threshold detection, and dual-threshold detection must be carried out when the draw ratio of rotor is larger.When eliminating amount of unbalance using dynamic balancing machine or dynamic balance instrument, need startup and stopping repeatedly, eliminate on a face or two faces for rotor afterwards or increase a part of quality, implementation process is very complicated, the required time is also very long, as long as and the rotating speed or Mass Distribution of rotor change and be accomplished by taking rotor on dynamic balancing machine or do dynamic balancing again using dynamic balance instrument.
The content of the invention
Realize that dynamic balancing works for convenience, more in order to which when the Mass Distribution or rotating speed of the big rotor of draw ratio change, rotor can realize self adaptation dynamic balancing, the present invention provides a kind of self adaptation three axial dynamic poise device.
For the tri-axial self-adaptive dynamic balance performs device of centrifuge, including the rotor being fixed on horizontal direction, along two Horizontal Dynamic Balancing execution units for being adjusted axially its dynamic balancing mass and be fixed on the face of cylinder of rotor respectively, the vertical dynamic balance execution unit of its dynamic balancing mass is vertically adjusted up and down and control the execution controller of dynamic balance execution unit；
Described dynamic balance execution unit includes the base being fixed on described rotor, it is fixed on the guide rail on described base, sliding block described in the sliding block being connected with described slide and promotion is fixed in the dynamic balancing mass on described sliding block along the described reciprocating transmission mechanism of guide rail；
Described rotor is externally provided with the data acquisition device of the periodic vibration response of collection rotor as caused by amount of unbalance, described data acquisition device from the amplitude and phase that can obtain vibratory response caused by different aequums and calculates the original unbalance of rotor and the moving direction of each sliding block and the connection of the processor of displacement according to described amplitude and phasometer, and described processor passes through wireless communication apparatus and the execution controller communication.
Further, described upper rotor surface is uniformly distributed four Horizontal Dynamic Balancing execution units, and the guide rails of two relative Horizontal Dynamic Balancing execution units is conllinear, sliding block moving direction is opposite；The guide rail of two adjacent Horizontal Dynamic Balancing execution units is mutually perpendicular to；
Four vertical dynamic balance execution units are uniformly distributed on the periphery of described rotor, the guide rail of all vertical dynamic balance execution units is parallel to each other；
Any pair of Horizontal Dynamic Balancing execution unit must have a pair of vertical dynamic balance execution units coplanar therewith.
Further, described data acquisition device includes being arranged on the rotary drive mechanism of described rotor, the rotating speed of rotary drive mechanism can be converted into the photoelectric encoder of pulse sequence signal, the data collecting card being connected with described photoelectric encoder, is connected with described data collecting card and whether inductiopn rotor vibrates and obtain the vibrating sensor of vibration signal and trigger described data collecting card, the trigger mechanism for making it start sampling；
External clock signal of the pulse signal that described photoelectric encoder is exported as data collecting card, input signal of the vibration signal that described vibrating sensor is exported as data collecting card, the sampled signal obtained after being sampled according to described external clock signal to described vibration signal as described data collecting card output signal, in the described processor of described sampled signal input.
Further, described vibrating sensor is current vortex sensor.
Further, described trigger mechanism is included being fixed on including being fixed on described horn, the magnet steel conllinear with the guide rail of any dynamic balance execution unit in horizontal direction and the Hall switch being connected with described data collecting card, described rotor every revolution, described Hall switch is met once with described magnet steel, and the data collecting card described in pulse-triggered that described Hall switch is sent when being met with described magnet steel is sampled.
Or, described trigger mechanism is opened in the groove on the face of cylinder of rotor, and described groove is corresponding with described lower vibrating sensor.
Further, described processor is included when rotor slowly runs, obtain and record respectively, the systematic error logging modle of the mismachining tolerance error curve of the rotor of lower vibrating sensor sensing, when rotor normal work, obtain and record respectively, first cache module of the first vibration signal produced by rotor of lower vibrating sensor sensing, makes the sliding block of Horizontal Dynamic Balancing execution unit be moved, and the performing module of sliding block moving direction and distance is recorded, obtain respectively and after the movement of recording level sliding block, on, second cache module of the second vibration signal produced by rotor of lower vibrating sensor sensing, makes the sliding block of vertical dynamic balance execution unit be moved, and the performing module of sliding block moving direction and distance is recorded, obtain and recorded after upright slide block movement respectively, on, 3rd cache module of the 3rd vibration signal produced by rotor of lower vibrating sensor sensing, respectively by first, second, mismachining tolerance in 3rd vibration signal is removed, and filter the noise of vibration signal, the amplitude and phase for obtaining vibration signal go error module, according to first, second, the amplitude and phase and the quality and displacement of sliding block of 3rd vibration signal, the original unbalance obtained on the upper surface and cylinder of rotor is calculated with influence coefficient method, and described amount of unbalance is converted to the computing module of the direction moved needed for the sliding block of each executing agency and distance, the performing module described in the direction moved needed for the sliding block that described computing module is obtained and distance input.
Further, described transmission mechanism includes stepper motor and screw mechanism, and leading screw is connected with the output shaft of described motor, and feed screw nut and described mass are affixed；Limit switch of the both sides of described leading screw respectively provided with limitation sliding block moving range, the two ends of described leading screw be connecteds by fulcrum bearing with base respectively, be fixed between described fulcrum bearing and described screw mandrel provided with bearing, described fulcrum bearing described in base；Described stepper motor is controlled by described execution controller.
Further, described rotary drive mechanism includes the gear mechanism with the rotor rotation described in drive, and gear wheel is set with described rotor coaxial, and little gear and described gear wheel engaged transmission, described photoelectric encoder are installed in the rotating shaft of described little gear.
Further, described processor is by wireless communication apparatus and described execution controller communication, and wireless communication apparatus is communicated using RS232 with described processor.
The present invention technical concept be：By installing dynamic balance execution unit on rotor, the adjusting parameter of dynamic balance execution unit is obtained by analyzing the vibratory response caused by amount of unbalance of rotor, rotor is reached dynamic balancing.When the rotating speed and Mass Distribution of rotor change, the vibratory response of rotor also changes accordingly, and processor will reanalyse, calculate vibratory response, re-moves the sliding block of dynamic balance execution mechanism, rotor is reached dynamic balancing again.The power imbalance that four dynamic balance execution units are used for eliminating rotor is installed in the upper surface of rotor, the couple unbalance that four dynamic balance execution units are used for eliminating rotor is installed on the face of cylinder of rotor.
The trigger signal of the invention for using Hall switch to start gathered data as the phase reference and data collecting card of dynamic balancing measurement.When rotor is rotated, what Hall switch was usually exported is high level, and low level will be exported when being met with magnet steel, so rotor every revolution, Hall switch exports a pulse, and this pulse input starts the reference signal of gathered data as data collecting card to capture card, its rising edge.
The trigger mechanism of data collecting card can also be made by opening up groove corresponding with lower vibrating sensor on the periphery of rotor.Instantly when vibrating sensor runs into groove, the output signal of sensor is undergone mutation, and the signal of this mutation is the trigger signal sampled as the data collecting card described in triggering.
When drive mechanism is acted, the power of motor is through little gear, and gear wheel is transferred to rotor, so that rotor is rotated；The rotating speed of little gear rotating shaft is converted to pulse train output by the photoelectric encoder being connected in little gear rotating shaft, this pulse train inputs to data collecting card, the external clock signal sampled as data collecting card, no matter ensureing rotor rotating speed size, rotor every revolution, data collecting card is integer-period sampled
It is individual, and the position of sampled point fixes；In the case where there is amount of unbalance, rotor has periodic vibration, and current vortex sensor is arranged on the outside of rotor, and the vibratory response to amount of unbalance of rotor is measured by the gap variable quantity of itself and rotor is detected；The output signal of current vortex sensor inputs to data collecting card, is used as the input signal of data collecting card；Data collecting card received and start after reference signal pulse, into the state for preparing sampling, and an external clock signal pulse is often received afterwards and gathers an input signal, has been gathered
Computer is transferred data to by usb bus after individual point, a data acquisition is completed.
Due to root diameter it is larger, circularity after machining can not possibly be fine, rotor is when rotated, the mismachining tolerance curve of rotor and the vibration response curve same frequency and phase of amount of unbalance are also fixed, so before being taken into use, the mismachining tolerance curved measurement of rotor should be come out and got off as the intrinsic reference record of system；Obtaining the method for rotor machining error curve is：It is that rotor turns under extremely low rotating speedTurn, the size for making vibration caused by amount of unbalance is almost 0, and system is after data acquisition described above, and data collecting card will collect the mismachining tolerance curve of rotor, and be transferred to processor.When calculating the amount of unbalance of rotor, first the mismachining tolerance in vibration signal is removed, the accuracy of control is improved.
The present invention, which has, to be directly mounted on rotor, self adaptation dynamic balancing adjustment, the advantage of precise control can be realized when the Mass Distribution or rotating speed of rotor change.
Brief description of the drawings
Fig. 1 is schematic diagram of the invention.
Fig. 2 is the schematic diagram of the first embodiment.
Fig. 3 is the schematic diagram of second of embodiment.
Fig. 4 is the sectional view of dynamic balance execution unit.
Fig. 5 is control flow chart of the invention.
Embodiment
Embodiment one
Referring to the drawings 1,2,4,5, the present invention is further illustrated：
For realizing the dynamic balance execution device of above-mentioned execution method, including the rotor 1 being fixed on horizontal direction, respectively along two Horizontal Dynamic Balancing execution unit 2-1 for being adjusted axially its dynamic balancing mass and be fixed on rotor the face of cylinder, vertically up and down adjust its dynamic balancing mass vertical dynamic balance execution unit 2-2 and control dynamic balance execution unit execution controller 7；
Described dynamic balance execution unit includes the base 21 being fixed on described rotor 1, it is fixed on the guide rail 22 on described base 21, the sliding block 23 that is slidably connected with described guide rail 22 and sliding block 23 described in promoting are along the described reciprocating transmission mechanism of guide rail 22, on the affixed and described sliding block 23 of described dynamic balancing mass 24, for four dynamic balance execution unit 2-1 in horizontal direction, the guide rail 22 of two relative dynamic balance execution unit 2-1 is conllinear, the moving direction of sliding block 23 is opposite, the guide rail 22 of two adjacent dynamic balance execution unit 2-1 is mutually perpendicular to；For four dynamic balance execution unit 2-2 of vertical direction, dynamic balance execution unit 2-2 guide rail 22 is parallel to each other, the mobile phase of sliding block 23 is same；Dynamic balance execution unit 2-1,2-2 is controlled by execution controller 7.
Described rotor 1 is externally provided with the harvester of the periodic vibration response of collection rotor 1 as caused by amount of unbalance, described harvester is from the amplitude and phase that can obtain vibratory response caused by different aequums and calculates the original unbalance of rotor and the moving direction of each sliding block according to described amplitude and phasometer and the processor 3 of displacement is connected, and described processor 3 is communicated by wireless communication apparatus 6 with described execution controller 7.
It is uniformly distributed four Horizontal Dynamic Balancing execution unit 2-1 on described rotor 1, the guide rail 22 of two relative Horizontal Dynamic Balancing execution unit 2-1 is conllinear, sliding block 23 moving direction is opposite；The guide rail 22 of two adjacent Horizontal Dynamic Balancing execution unit 2-1 is mutually perpendicular to；
Four vertical dynamic balance execution unit 2-2 are uniformly distributed on the periphery of described rotor 1, all vertical dynamic balance execution unit 2-2 guide rail 22 is parallel to each other；
Any pair of Horizontal Dynamic Balancing execution unit 2-1 must have a pair of vertical dynamic balance execution unit 2-2 coplanar therewith.
Described harvester includes being arranged on the rotary drive mechanism of described rotor 1, the rotating speed of rotary drive mechanism can be converted into the photoelectric encoder 41 of pulse sequence signal, the data collecting card 42 being connected with described photoelectric encoder 41, is connected with described data collecting card 42 and whether inductiopn rotor 1 vibrates and obtain the vibrating sensor 43 of vibration signal and trigger described data collecting card 42, the trigger mechanism for making it start sampling；
External clock signal of the pulse signal that described photoelectric encoder 41 is exported as data collecting card 42, input signal of the vibration signal that described vibrating sensor 43 is exported as data collecting card 42, the sampled signal obtained after being sampled according to described external clock signal to described vibration signal as described data collecting card 42 output signal, in the described processor 3 of described sampled signal input.
Described vibrating sensor 43 is current vortex sensor.
Described trigger mechanism includes the magnet steel 441 being fixed on described rotor and the Hall switch 442 being connected with described data collecting card 42, the described every revolution of rotor 1, described Hall switch 442 meets once with described magnet steel 441, the data collecting card 42 described in pulse-triggered that described Hall switch 442 is sent when being met with described magnet steel 441.
Described processor 3 is included when horn slowly runs, obtain and record the systematic error logging modle of the mismachining tolerance curve of horn, when 1 normal work of rotor, obtain and record respectively, first cache module of the first vibration signal produced by rotor 1 that lower vibrating sensor 43 senses, Horizontal Dynamic Balancing execution unit 2-1 sliding block is set to be moved, and record the performing module of sliding block moving direction and distance, obtain and recorded after the movement of sliding block 23 respectively, on, second cache module of the second vibration signal produced by rotor 1 that lower vibrating sensor 43 senses, vertical dynamic balance execution unit 2-2 sliding block is set to be moved, and record the performing module of sliding block moving direction and distance, obtain and recorded after the movement of sliding block 23 respectively, on, 3rd cache module of the 3rd vibration signal produced by rotor 1 of lower vibrating sensor sensing；Respectively by corresponding mismachining tolerance in first, second, third vibration signal remove and filtering interfering noise signal, obtain vibration signal amplitude and phase go error module, calculated according to the amplitude and phase of first, second, third vibration signal and the quality and displacement of sliding block, with influence coefficient method and obtain the amount of unbalance of rotor and the direction moved needed for described amount of unbalance is converted into the sliding block 23 of each executing agency and the computing module of distance.
Described transmission mechanism includes stepper motor 251 and screw mechanism, and leading screw 252 is connected with the output shaft of described motor 251, and feed screw nut 253 and described mass 24 are affixed；Limit switch 254 of the both sides of described leading screw 252 respectively provided with limitation sliding block moving range, the two ends of described leading screw are connected by fulcrum bearing 255 with base 21 respectively, bearing 256 is provided between described fulcrum bearing 255 and described screw mandrel 254, described fulcrum bearing 255 is fixed on described base 21；Described stepper motor 251 is controlled by described execution controller 7.
Described rotary drive mechanism includes the gear mechanism rotated with the rotor 1 described in drive, gear wheel 51 is coaxially disposed with described rotor 1, little gear 52 and the described engaged transmission of gear wheel 51, described photoelectric encoder 41 are installed in the rotating shaft 53 of described little gear 52.
Described processor 3 is communicated by wireless communication apparatus 6 with described execution controller 7, and wireless communication apparatus 6 is communicated using RS232 with described processor 3.
The execution step of processor is as follows：
（1）, the current rotating speed of drive mechanism of rotor rotation will be driven to be converted into pulse sequence signal, it is ensured that rotor every revolution, no matter rotor speed is just, the umber of pulse in pulse train is the same, in real time the described pulse sequence signal of record；
（2）, a mark is set on rotor so that rotor every revolution, mark sends a pulse signal, and mark position on a sliding block moving direction；And provide using the centre of gyration of rotor as origin, the line of described mark and described origin is
Axle, the direction from described origin to described mark is
To, and found according to the right-hand rule
Axle and
To,
Axle and
To now providing
Axle and
That face that axle is determined is upper rectifying plane,Axle and
That face that axle is determined is
Face,
Axle andThat face that axle is determined isFace,
Face and
Face composition cylindrical correction face；Outside rotor, vibrating sensor is installed in the position close to upper rotor surface, vibrating sensor under being installed in the position close to rotor lower surface, the face where upper vibrating sensor is upper test surfaces, the face where lower vibrating sensor is lower test surfaces；
（3）, rotor preserves described mismachining tolerance curve as systematic error before being taken into use, it is necessary to obtain the mismachining tolerance curve of rotor；Horn is set to turn under extremely low rotating speed
Turn, the size for making vibration caused by amount of unbalance is almost 0, external clock signal using current pulse train signal as data collecting card, to mark the pulse signal sent as the trigger signal of data collecting card, described horn mismachining tolerance curve is carried out integer-period sampled, the revolution that sampling horn is rotated is
, horn every revolution, data collecting card is integer-period sampled
It is individual, the mismachining tolerance curve for the rotor that upper and lower vibrating sensor is measured respectively：First mismachining tolerance curve（
）, the second mismachining tolerance curve
（
）, first, second described mismachining tolerance curve of record；
（4）, make rotor be in normal operating conditions, obtain the first vibration signal caused by the amount of unbalance of rotor, external clock signal using current pulse train signal as data collecting card, to mark the pulse sent as the trigger signal of data collecting card, the first described vibration signal is sampled, revolution and each revolution of sampling number and step that sampling horn is rotated（3）In it is the same, be respectively
With, upper and lower vibrating sensor obtains the first vibration response curve respectively
、
（
）；Remove corresponding mismachining tolerance in the first vibration response curve
、（
）,
It is respectively using the amplitude and phase from motion tracking correlation filtering method elimination interference signal and the first vibration response curve of acquisition：
（5）, respectively move in rectifying plane
、
The sliding block of dynamic balance execution unit on axial direction, and record the displacement of two axial top shoes movements and be respectively
、
（
Axial direction two sliding block displacements it is equivalent, need to only be moved when using it is therein any one,
Axial direction two sliding block displacements it is also equivalent, need to only be moved when using it is therein any one）, wherein if displacement is just represents to move to positive direction, it is that negative indication is moved to negative direction；
Upper and lower vibrating sensor obtains the second vibration signal caused by the current amount of unbalance of rotor respectively, external clock signal using current pulse train signal as data collecting card, to mark the pulse sent to be sampled as the trigger signal of data collecting card to the second described vibration signal, revolution and each revolution of sampling number and step that sampling horn is rotated（3）In it is the same, be respectively
With
, upper and lower vibrating sensor obtains the second vibration response curve respectively
、
（
）；Remove the mismachining tolerance in the second vibration response curve
、
（
）, utilize the amplitude and phase that interference signal and the second vibration response curve of acquisition are eliminated from motion tracking correlation filtering method：
（6）, in movement in rectifying plane
、The sliding block of the dynamic balance execution unit of axial direction, makes two axial top shoes return to initial position, the sliding block of the dynamic balance execution unit in cylindrical correction face is moved afterwards, is madeThe sliding block difference moving displacement of dynamic balance execution unit on face
、
, make
The sliding block difference moving displacement of dynamic balance execution unit on face、
If wherein displacement is moved on the occasion of expression to positive direction, negative value represents to move to negative direction, keep test speed constant, upper and lower vibrating sensor obtains the 3rd vibration signal caused by the current amount of unbalance of rotor respectively, external clock signal using current pulse train signal as data collecting card, to mark the pulse sent to be sampled as the trigger signal of data collecting card to the 3rd described vibration signal, revolution and each revolution of sampling number and step that sampling horn is rotated（3）In it is the same, be respectively
With
, and the 3rd vibration response curve of acquisition of sampling is carried out to the 3rd vibration signal、
（
）；Remove the mismachining tolerance in the 3rd vibration response curve
、
（
）, utilize the amplitude and phase that interference signal and the 3rd vibration response curve of acquisition are eliminated from motion tracking correlation filtering：
（7）The sliding block of four in cylindrical correction face vertical dynamic balance execution units is set to be moved to initial position；
（8）, according to step（4）, step（5）And step（6）The amplitude and phase of first, second, third vibration response curve drawn, and each sliding block moving direction and displacement, calculate the original unbalance in the upper correction and cylindrical correction face of rotor using influence coefficient method：
Wherein：
,,,
,
,
,
,
, wherein
For the radius of gyration of vertical direction dynamic balance execution unit sliding block,mFor movable part quality, movable part includes sliding block, feed screw nut, dynamic balancing mass and the bolt and nut of connection；
If initial unbalance,
Axle and
Component on axle is respectively
、
, initial unbalance,
Plane and
Component in plane is respectively
、
：
Then
Direction and
Sliding block on direction needs the mobile distance to be respectively、
, and
,
Wherein
For the radius of gyration of vertical direction dynamic balance execution unit sliding block,mFor movable part quality, movable part includes sliding block, feed screw nut, dynamic balancing mass and the bolt and nut of connection；Result of calculation be on the occasion of when represent to corresponding axis positive direction movement, represented when being negative direction from negative value to corresponding axis movement；
（9）, the sliding block of each dynamic balance execution mechanism is moved to the position of requirement；Current vibratory response is obtained, current vibration is judged whether in vibration allowed band, if so, then keeping the position of each sliding block；If it is not, then return to step（4）.
Step（9）In, before mobile sliding block, first judge whether sliding block can be moved to outside guide rail：If so, then sending alarm, and point out that dynamic balancing can not be completed；If it is not, then moving sliding block.
The present invention technical concept be：By installing dynamic balance execution unit 2-1,2-2 on rotor, the adjusting parameter of dynamic balance execution unit is obtained by analyzing the vibratory response caused by amount of unbalance of rotor 1, rotor 1 is reached dynamic balancing.When the rotating speed and Mass Distribution of rotor 1 change, the vibratory response of rotor 1 also changes accordingly, and processor 3 will reanalyse, calculate vibratory response, re-moves the sliding block 23 of dynamic balance execution mechanism, rotor 1 is reached dynamic balancing again.The power imbalance that four Horizontal Dynamic Balancing execution unit 2-1 are used for eliminating rotor is installed installed in the upper surface of rotor, the couple unbalance that four vertical dynamic balance execution unit 2-2 are used for eliminating rotor is installed installed in the face of cylinder of rotor.
The trigger signal of the invention for using Hall switch to start gathered data as the phase reference and data collecting card of dynamic balancing measurement.When rotor is rotated, what Hall switch was usually exported is high level, and low level will be exported when being met with magnet steel, so rotor every revolution, Hall switch exports a pulse, and this pulse input starts the reference signal of gathered data as data collecting card to capture card, its rising edge；When drive mechanism is acted, the power of motor is through little gear, and gear wheel is transferred to horn, so that horn is rotated；The rotating speed of little gear rotating shaft is converted to pulse train output by the photoelectric encoder being connected in little gear rotating shaft, this pulse train inputs to data collecting card, the external clock signal sampled as data collecting card, no matter ensureing rotor rotating speed size, rotor every revolution, data collecting card is integer-period sampledIt is individual, and the position of sampled point fixes.In the case where there is amount of unbalance, rotor has periodic vibration, and upper and lower current vortex sensor is arranged on the outside of rotor, and the vibratory response to amount of unbalance of rotor is measured by the gap variable quantity of itself and rotor is detected；The output signal of upper and lower current vortex sensor inputs to data collecting card, is used as the input signal of data collecting card；Data collecting card received and start after reference signal pulse, into the state for preparing sampling, and an external clock signal pulse is often received afterwards and gathers an input signal, has been gathered
Computer is transferred data to by usb bus after individual point, a data acquisition is completed.
Due to root diameter it is larger, circularity after machining can not possibly be fine, rotor is when rotated, the mismachining tolerance curve of rotor and the vibration response curve same frequency of amount of unbalance, same-phase, so before being taken into use, the mismachining tolerance curved measurement of rotor should be come out and got off as the intrinsic reference record of system；Obtaining the method for rotor machining error curve is：It is that rotor turns under extremely low rotating speed
Turn, the size for making amount of unbalance is almost 0, and system is after data acquisition described above, and capture card will collect the mismachining tolerance curve of rotor, and be transferred to processor.When calculating the amount of unbalance of rotor, first the mismachining tolerance in vibration signal is removed, the accuracy of control is improved.
A mark is set on rotor so that rotor every revolution, mark sends a pulse signal, and the position marked is on a sliding block moving direction；And provide using the centre of gyration of rotor as origin, the line of described mark and described origin is
Axle, the direction from described origin to described mark is
To, and found according to the right-hand rule
Axle and
To,
Axle andTo now providing
Axle andThat face that axle is determined is upper rectifying plane,
Axle and
That face that axle is determined is
Face,
Axle and
That face that axle is determined is
Face,
Face andFace composition cylindrical correction face；Outside rotor, vibrating sensor is installed in the position close to upper rotor surface, vibrating sensor under being installed in the position close to rotor lower surface, the face where upper vibrating sensor is upper test surfaces, the face where lower vibrating sensor is lower test surfaces；Data collecting card gathers pivoted arm every time
The signal of individual turn over, upper and lower test surfaces upper rotor part mismachining tolerance curve is respectively
、（
）, measuring the first vibration signal on upper and lower test surfaces is respectively
、
（
）, the second vibration signal is respectively on upper and lower test surfaces
、
（）, the 3rd vibration signal is respectively on upper and lower test surfaces
、（
）, the quality of movable part is
, movable part include dynamic balancing mass, feed screw nut, sliding block and the bolt and nut for connection.
（1）Mismachining tolerance is eliminated, is obtained due to vibration signal caused by amount of unbalance：
（
）
（）
（2）Using from motion tracking correlation filtering method eliminate interference signal and obtain rotor the first vibration signal vibration amplitude and phase：
If the expression formula of the first vibration response signal is on upper test surfaces
, the expression formula of the first vibration signal is on lower test surfaces
（
）, wherein
、
For unbalanced signal,
、
For interference noise；
If
,
（）
It is right
,From
Summation：
It is right
, wherein
, in the case where the sampling period is enough：
,
It is right
, wherein
, in the case where the sampling period is enough：
So,
So
,
The amplitude and phase of the vibration of institute's the first vibration signal of above test surfaces be respectively：
Similarly, it is respectively using the vibration amplitude and phase described above for eliminating interference signal from motion tracking correlation filtering and obtaining the first vibration response signal on the lower test surfaces of rotor：
Similarly, it is respectively using the vibration amplitude and phase described above for eliminating interference signal from motion tracking correlation filtering and obtaining second, third vibration response signal on the upper and lower test surfaces of rotor：
（3）The amount of unbalance of rotor is calculated using influence coefficient method：
First, second, third vibration signal of upper and lower test surfaces can be write as vector form：
If amount of unbalance when initial on rotor on rectifying plane and cylindrical correction face is respectively
、
, the vibration response signal of corresponding upper and lower test surfaces is respectively the first vibration response signal
、
If influence coefficient of the amount of unbalance to upper and lower test surfaces on upper rectifying plane and cylindrical correction face is respectively
、、
、
, then
On upper rectifying plane
Axially,
The sliding block moving displacement of axial dynamic balance execution unit（Wherein
For
The displacement of axial direction,
For
The displacement of axial direction, setting is on the occasion of representing to move to positive direction, and negative value represents to move to negative direction）, then the sliding block movement generation power amount of unbalance on due to upper rectifying plane is
, keep test speed constant, then now the vibration response signal of upper and lower test surfaces is the second vibration signal：
Make on rectifying plane
Axially,
The sliding block of axial dynamic balance execution unit is moved to initial position, and makes
The sliding block difference moving displacement of dynamic balance execution unit on face
、
, and make
The sliding block difference moving displacement of dynamic balance execution unit on face
、
（Setting is on the occasion of representing to move to positive direction, and negative value represents to move to negative direction）, then the sliding block movement generation couple unbalance amount on due to cylindrical correction face is, wherein
For the radius of gyration of vertical direction dynamic balance execution unit sliding block,mFor movable part quality, movable part includes sliding block, feed screw nut, dynamic balancing mass and the bolt and nut of connection, keeps test speed constant, then now the vibration response signal of upper and lower test surfaces is the 3rd vibration signal：
It can be obtained by (1) and (2)
It can be obtained by (1) and (3)
(5) substitution (1) can be obtained into original unbalance is：
(4) and (5) substitution (6) can be obtained：
（4）The sliding block of four in cylindrical correction face dynamic balance execution units is set to be moved to initial position;
（5）Calculate displacement and the direction of the sliding block of three axial dynamic balance execution units;
If initial unbalance,
Axle andComponent on axle is respectively
、
, initial unbalance,
Plane and
Component in plane is respectively、
, then initial unbalance, vector can be converted into plural form：
Then
Direction andSliding block on direction needs the mobile distance to be respectively
、, and
Wherein
For the radius of gyration of vertical direction dynamic balance execution unit sliding block；Result of calculation be on the occasion of when represent to corresponding axis positive direction movement, represented when being negative direction from negative value to corresponding axis movement.
Embodiment two
Reference picture 2,3,4,5
The present embodiment with being in place of the difference of embodiment two：Described trigger mechanism is opened in the groove on the face of cylinder of rotor, and described groove is corresponding with described lower vibrating sensor.
The technical concept of the present embodiment is：The trigger mechanism of data collecting card is made by opening up groove corresponding with vibrating sensor on the periphery of rotor.When vibrating sensor runs into groove, the output signal of sensor is undergone mutation, and the signal of this mutation is the trigger signal sampled as the data collecting card described in triggering.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept; protection scope of the present invention is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also and in those skilled in the art according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (10)
1. the tri-axial self-adaptive dynamic balance performs device for centrifuge, it is characterised in that：Including being fixed on the horizontal direction of rotor, along two Horizontal Dynamic Balancing execution units for being adjusted axially its dynamic balancing mass and being fixed on the face of cylinder of rotor respectively, the vertical dynamic balance execution unit of its dynamic balancing mass is vertically adjusted up and down and control the execution controller of dynamic balance execution unit, each execution unit is controlled by described execution controller；
Described dynamic balance execution unit includes the base being fixed on described rotor, it is fixed on the guide rail on described base, sliding block described in the sliding block being connected with described slide and promotion is fixed in the dynamic balancing mass on described sliding block along the described reciprocating transmission mechanism of guide rail；
Described rotor is externally provided with the data acquisition device of the periodic vibration response of collection rotor as caused by amount of unbalance, and described data acquisition device from the amplitude and phase that can obtain vibratory response caused by different aequums and calculates the original unbalance of rotor and the moving direction of each sliding block and the connection of the processor of displacement according to described amplitude and phasometer.
2. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 1, it is characterised in that：It is uniformly distributed four Horizontal Dynamic Balancing execution units on described rotor, the guide rails of two relative Horizontal Dynamic Balancing execution units is conllinear, sliding block moving direction is opposite；The guide rail of two adjacent Horizontal Dynamic Balancing execution units is mutually perpendicular to；
Four vertical dynamic balance execution units are uniformly distributed on the periphery of described rotor, the guide rail of all vertical dynamic balance execution units is parallel to each other；
Any pair of Horizontal Dynamic Balancing execution unit must have a pair of vertical dynamic balance execution units coplanar therewith.
3. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 2, it is characterised in that：Described data acquisition device includes being arranged on the rotary drive mechanism of described rotor, the rotating speed of rotary drive mechanism can be converted into the photoelectric encoder of pulse sequence signal, the data collecting card being connected with described photoelectric encoder, is connected with described data collecting card and whether inductiopn rotor vibrates and obtain the vibrating sensor of vibration signal and trigger described data collecting card, the trigger mechanism for making it start sampling；
External clock signal of the pulse signal that described photoelectric encoder is exported as data collecting card, input signal of the vibration signal that described vibrating sensor is exported as data collecting card, the sampled signal obtained after being sampled according to described external clock signal to described vibration signal as described data collecting card output signal, in the described processor of described sampled signal input.
4. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 3, it is characterised in that：Described vibrating sensor is current vortex sensor.
5. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 4, it is characterised in that：Described trigger mechanism includes the magnet steel being fixed on described rotor and the Hall switch being connected with described data collecting card, described rotor every revolution, described Hall switch is met once with described magnet steel, and the data collecting card described in pulse-triggered that described Hall switch is sent when being met with described magnet steel is sampled.
6. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 4, it is characterised in that：Described trigger mechanism is opened in the groove on the face of cylinder of rotor, and described groove is corresponding with described lower vibrating sensor.
7. the tri-axial self-adaptive dynamic balance performs device for centrifuge as described in right wants 5 or 6, it is characterised in that：Described processor is included when rotor slowly runs, obtain and record respectively, the systematic error logging modle of the mismachining tolerance error curve of the rotor of lower vibrating sensor sensing, when rotor normal work, obtain and record respectively, first cache module of the first vibration signal produced by rotor of lower vibrating sensor sensing, makes the sliding block of Horizontal Dynamic Balancing execution unit be moved, and the performing module of sliding block moving direction and distance is recorded, obtain respectively and after the movement of recording level sliding block, on, second cache module of the second vibration signal produced by rotor of lower vibrating sensor sensing, makes the sliding block of vertical dynamic balance execution unit be moved, and the performing module of sliding block moving direction and distance is recorded, obtain and recorded after upright slide block movement respectively, on, 3rd cache module of the 3rd vibration signal produced by rotor of lower vibrating sensor sensing, respectively by first, second, mismachining tolerance in 3rd vibration signal is removed, and filter the noise of vibration signal, the amplitude and phase for obtaining vibration signal go error module, according to first, second, the amplitude and phase and the quality and displacement of sliding block of 3rd vibration signal, the original unbalance obtained on the upper surface and cylinder of rotor is calculated with influence coefficient method, and described amount of unbalance is converted to the computing module of the direction moved needed for the sliding block of each executing agency and distance.
8. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 7, it is characterised in that：Transmission mechanism includes stepper motor and screw mechanism, and leading screw is connected with the output shaft of described motor, and feed screw nut and described mass are affixed；Limit switch of the both sides of described leading screw respectively provided with limitation sliding block moving range, the two ends of described leading screw be connecteds by fulcrum bearing with base respectively, be fixed between described fulcrum bearing and described screw mandrel provided with bearing, described fulcrum bearing described in base；Described stepper motor is controlled by described execution controller.
9. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 8, it is characterised in that：Rotary drive mechanism include driving described in rotor rotation gear mechanism, gear wheel set with described rotor coaxial, and little gear and described gear wheel engaged transmission, described photoelectric encoder are installed in the rotating shaft of described little gear.
10. it is used for the tri-axial self-adaptive dynamic balance performs device of centrifuge as claimed in claim 9, it is characterised in that：Described processor passes through wireless communication apparatus and described execution controller communication.
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| EP3342341B1 (en) * | 2015-08-28 | 2019-12-18 | Kaohsiung Medical University | Multi-axis load bearing and gravity center measuring device |
| CN107356373A (en) * | 2017-08-21 | 2017-11-17 | 东莞市卓茂仪器有限公司 | A kind of flabellum dual-threshold detection machine |
| CN107860515B (en) * | 2017-11-08 | 2019-08-06 | 攀钢集团攀枝花钢钒有限公司 | Fan rotor balance method |
| CN112284618A (en) * | 2019-07-27 | 2021-01-29 | 九江精密测试技术研究所 | Dynamic balance adjusting device of high-precision precise centrifuge |
| CN110926701B (en) * | 2019-11-08 | 2021-10-15 | 深圳智源工业互联网创新中心有限公司 | Dynamic balance correction method and automation equipment using same |
| CN113029439B (en) * | 2019-12-24 | 2022-07-12 | 苏州宝时得电动工具有限公司 | Motor rotor balance detection device and motor rotor balance detection method and equipment |
| CN113203522B (en) * | 2021-05-07 | 2022-08-09 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic balance control system and method for rotary machine |
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| CN1715857A (en) * | 2004-08-12 | 2006-01-04 | 浙江大学 | Dynamic balance measuring device |
| CN101576425A (en) * | 2009-06-18 | 2009-11-11 | 北京理工大学 | Measuring method for static balance of turbine vane wheel and device thereof |
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| CN1715857A (en) * | 2004-08-12 | 2006-01-04 | 浙江大学 | Dynamic balance measuring device |
| CN101576425A (en) * | 2009-06-18 | 2009-11-11 | 北京理工大学 | Measuring method for static balance of turbine vane wheel and device thereof |
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