CN207610853U - The measuring device of rotating machinery beat amount - Google Patents
The measuring device of rotating machinery beat amount Download PDFInfo
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- CN207610853U CN207610853U CN201721492619.4U CN201721492619U CN207610853U CN 207610853 U CN207610853 U CN 207610853U CN 201721492619 U CN201721492619 U CN 201721492619U CN 207610853 U CN207610853 U CN 207610853U
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Abstract
The utility model discloses a kind of measuring devices of rotating machinery beat amount, the regular polygon magnetic disturbance portion on rotor is fixed at including center, it is fixed at the magnet steel of rotor side, and the inspection magnetic portion of rotor side is correspondingly arranged and is located at the magnet steel, the inspection magnetic portion includes magnetic induction loop, and the controller being connect with the magnetic induction loop.The method of the mesh monitoring rotating machinery beat amount of the utility model.Without installing other measuring devices additional on machine, it is acquired according to certain order by the tach signal of machine, according to the time difference in the speed voltage signal period that the magnetic disturbance portion cutting magnetic line of rotor top polygonized structure generates, the beat amount and phase of rotors are calculated.
Description
Technical field
The utility model is related to rotating machinery control technology fields, more particularly to a kind of measurement of rotating machinery beat amount
Device.
Background technology
The vibration root of rotating machinery is the vibration of rotor, and the vibration of rotor includes the vibration of shaft and bearing, and the modern times shake
Dynamic monitoring and fault diagnosis system generally directly detect the vibration of shaft using eddy current sensor, and this method makes vibration monitoring
There is qualitative leap with the precision level of analysis.It is usually to use eddy current sensor, rotary shaft to rotary shaft radial vibration detection
Radial vibration detection is research and solves the method for dynamic equilibrium problems and carry out the basis of fault diagnosis.
But when detecting shaft vibration with eddy current sensor, the out-of-roundness of shaft and the smooth degree on surface are to measuring
Have a significant impact.This to be referred to as beat by the uneven caused signal of shaft out-of-roundness and measured surface, they are superimposed upon
On indeed vibrations signal, people is made to generate error to the analysis of vibration and processing, causes diagnosis and vibration processing unsuccessful, lead
Cause the failure of engineering practice and engineering research.The processing of beat is still a problem of the art up to now.
Utility model content
The purpose of this utility model is to be directed to technological deficiency existing in the prior art, and provide a kind of rotating machinery beat
The measuring device of amount.
Technical solution is used by realize the purpose of this utility model：
A kind of measuring device of rotating machinery beat amount, including center are fixed at the regular polygon magnetic disturbance on rotor
Portion is fixed at the magnet steel of rotor side, and is correspondingly arranged and is located at the inspection magnetic portion of rotor side, institute with the magnet steel
The inspection magnetic portion stated includes magnetic induction loop, and the controller being connect with the magnetic induction loop.
The magnetic disturbance portion is sheet or bulk.
The regular polygon while with while junction be processed circular arc chamfering.
The radius ratio of one of rounded corner is other to want short, remaining rounding radii is identical.
The magnet steel be located at inspection magnetic portion and magnetic disturbance portion between, the magnet steel between magnetic disturbance portion at a distance from 2-
10mm。
The magnet steel is Nd-Fe-B magnet steel, ferrite magnetic steel, alnico magnet or iron B permanent magnetic material.
The magnet steel is arc-shaped structure of the center of circle on the central shaft of the rotor, and the rotating machinery is electricity
Machine.
The magnetic disturbance portion is centrally formed with through-hole, and the rotor passes through the through-hole sandwich to position.
For the thickness in the magnetic disturbance portion in 3-5cm, the magnetic disturbance portion is hexagonal structure.
The inspection magnetic portion further includes the voltage detection mechanism being connect with the magnetic induction loop, the voltage detecting machine
Structure is connect with the controller communication.
A kind of measurement method of the measuring device of the rotating machinery beat amount, includes the following steps,
1) start to sample, record in a speed cycle, the corresponding time T of each angle rotation respective angles in magnetic disturbance portioni
(i=1,2,3 ... ... n), and n is the number of edges of corresponding polygon,
2) it is f and each time T to calculate rotary speed of rotatoriCorresponding angle betai, βi=2 π fTi, (i=1,2,3 ... ...
n)；
3) by βiIt brings intoUsing iterative method, in the case that satisfaction | x |≤k, | y |≤k, adopt
With certain step delta, the offset coordinates (x, y) of rotor, wherein α are calculatedi(i=1,2,3 ... n) it is each angle pair in magnetic disturbance portion
The calculating angle answered.
Compared with prior art, the utility model has the beneficial effects that：
The measuring device of the rotating machinery beat amount of the utility model is led to without installing other measuring devices additional on machine
The tach signal for crossing machine is acquired according to certain order, and magnetic is cut according to the magnetic disturbance portion of rotor top polygonized structure
The time difference in the speed voltage signal period that the line of force generates, calculates the beat amount and phase of rotors.
Description of the drawings
Fig. 1 show the structural schematic diagram of the measuring device of the rotating machinery beat amount of the utility model；
Fig. 2 show the measurement method flow diagram of the utility model.
Specific implementation mode
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
Include that center is fixed at rotor 4 the utility model discloses a kind of measuring device of rotating machinery beat amount
On polygon magnetic disturbance portion 1, be fixed at the magnet steel 3 of rotor side, and be correspondingly arranged and be located at the magnet steel
The inspection magnetic portion 2 of rotor side, the inspection magnetic portion includes magnetic induction loop, and the controller being connect with the magnetic induction loop.
The inspection magnetic portion and magnet steel are relatively fixed, and will not be rotated with rotor, and magnetic perturbation dynamic component can be rotated with rotor.The inspection
Magnetic portion further includes the voltage detection mechanism being connect with the magnetic induction loop, the voltage detection mechanism and the controller
Communication connection.
The magnetic disturbance portion designed using polygonized structure, can be made, the magnet steel of remaining side of metal or magnetic metal
A magnetic field is formed, when magnetic disturbance portion rotates with rotor, which can change, i.e., detected portion perceives, described
Inspection magnetic portion can be the likes such as eddy current sensor, the variation in magnetic field is converted into voltage change information to analyze.
The method of the mesh monitoring rotating machinery beat amount of the utility model.Without installing other measuring devices additional on machine,
It is acquired according to certain order by the tach signal of machine, is cut according to the magnetic disturbance portion of rotor top polygonized structure
The time difference in the speed voltage signal period that the magnetic line of force generates, calculates the beat amount and phase of rotors.
Preferably, the magnetic disturbance portion is sheet or bulk, and the magnetic disturbance portion is regular hexagon structure, described
Hexagon while with while junction be processed circular arc chamfering, wherein five rounding radiis are identical, the radius of another rounded corner
Than other short (referred to as short angles), remaining rounding radii is identical (referred to as long angle).Rotor rotates a week, and there are one peak is apparent
Small, this small peak corresponds to the short angle in speed measuring device.
When machine is run, the rotor of rotation drives the hexagon rotation of magnetic disturbance portion, six angles to cause to examine magnetic portion surrounding magnetic field
Cyclically-varying, changing magnetic field make inspection magnetic portion generate induced voltage.Surveyed using the induced voltage of this mechanical periodicity
Measure machine rotational speed.The hexagonal structure on sub- top and the design at long angle and short angle are filled, rotor rotates a week, and there are one peaks
Apparent small, this small peak corresponds to the short angle in speed measuring device.It can realize in this way and be carried out at the same time tachometric survey in partial pendulum measurement amount, and
And rotor oscillation simultaneously, speed measuring device can also cause the variation of velocity coils surrounding magnetic field, equally can also cause tach signal
Variation, the tach signal of this variation are corresponding with rotor beat amount.Induced voltage is analyzed, you can obtain rotating speed and
Beat amount.
Further, magnet steel be located at inspection magnetic portion and magnetic disturbance portion between, the magnet steel between magnetic disturbance portion at a distance from
2-10mm, the magnet steel are Nd-Fe-B magnet steel, ferrite magnetic steel, alnico magnet or iron B permanent magnetic material.Described is circle
Arc-shaped structure of the heart on the central shaft of the rotor.
It is arranged using preferred distance, accuracy of detection is high, and preferably, the magnetic disturbance portion is centrally formed with
Through-hole, the rotor pass through the through-hole sandwich to position.In general, the thickness in the magnetic disturbance portion is in 3-
5cm.Using clipping positioning is set with, easily the device can be assemblied on the axis of rotor, moreover, extend as further,
Multiple magnetic disturbance portions, magnet steel and inspection magnetic portion can be assembled on rotor, carrying out same type using multiple and different orientation carries out beat
Measurement enhances the accuracy for measurement of posing for photograph, and when carrying out data analysis, because of speed waveform having the same, letter
Intractability is changed.
Specifically, the rotating machinery can be motor, steam turbine, gas turbine, centrifugal and Axial Flow Compressor, wind
Machine, pump, the hydraulic turbine, generator and aero-engine etc. are widely used in the departments such as electric power, petrochemical industry, metallurgy and aerospace.
Rotor beat amount is related with the time of voltage signal cycles that magnetic disturbance portion cutting magnetic line generates；According to magnetic disturbance
Portion's structure and its speed voltage signal of generation, according to specific sampling order, each angle rotation of record speed measuring device to it is corresponding when
Between；According to the relational expression of beat amount and above-mentioned time, the beat amount of rotor is calculated.By taking regular hexagon magnetic disturbance portion as an example,
The measurement method includes the following steps：
Step 1：Start to sample according to tach signal small peak zero crossing, record in a speed cycle, magnetic disturbance portion is each
Angle rotates the corresponding time T of respective anglesi(i=1,2,3,4,5,6)；
Wherein, when sampling order is that rotor rotates a circle, when tach signal small peak voltage is 0V, sampling is proceeded by.Ti
(i=1,2,3,4,5,6) tach signal is corresponded to respectively by the time needed for zero-wave crest-zero-trough-zero.T1It is corresponding to survey
The short angle of speed variator, Ti(i=2,3,4,5,6) five long angles of speed measuring device are corresponding in turn to.
If rotor rotation center is O'(x, y), then the beat amount of rotor and phase angle：
It is O'(x, y with rotor rotation center) it is vertex, when rotor rotates a circle, folded angle can table between adjacent angular
It is shown as：
Each corresponding angle is calculated, and the workpiece machining error for reducing hexagon magnetic disturbance portion is brought to subsequently calculating
Error, improve precision.
Step 2：The T recorded according to step 1i, calculating rotary speed of rotator is f and each time TiCorresponding angle betai；
βi=2 π fTi(i=1,2,3,4,5,6)
Step 3：(3) that step 2 is calculated
Ti--- the time required to actual measurement rotation respective angles.
Respective angles required time T is rotated according to rotori, using iterative method, using a fixed step size, according to (4) formula,
The offset coordinates (x, y) of rotor can be calculated.
Iterative method is used in the step 3, different step-lengths can be used, and improves computational accuracy.Rotor in the step 3
Offset coordinates must satisfy | x |≤k, | y |≤k, k be magnetic disturbance portion at a distance from machine stator.
Using the measurement method of rotating machinery beat amount described in the utility model, carried out by the tach signal of rotating machinery
The sampling and calculating of one graded, you can be quickly obtained its beat and phase condition, without installing additional measuring device, be
The operating status for monitoring rotating machinery on-line provides a kind of means.
Rotating machinery partial pendulum measurement amount method includes the following steps：
With rotor beat amount for (0.050mm, -0.036mm), it is 3V that the long angle of speed measuring device, which corresponds to speed voltage signal amplitude,
(single peak), it is 2.4V (single peak) that the short angle of speed measuring device, which corresponds to speed voltage signal amplitude, is that 155 cycle per minute clocks are with rotating speed
The utility model is described in detail in example：
Step 1：Start to sample according to tach signal small peak zero crossing, record in a speed cycle, magnetic disturbance portion is each
The angle rotation respective angles corresponding time is respectively T1=1.07503ms, T2=1.07956ms, T3=1.08108ms, T4=
1.07725ms T5=1.07211ms, T6=1.06670ms；
Step 2：The T recorded according to step 1i, it is 155 cycle per minute clocks and each time T to calculate rotary speed of rotatoriIt is corresponding
Angle beta1=60.011 °, β2=60.114 °, β3=60.102 °, β4=60.053 °, β5=59.954 °, β6=59.766 °；
Step 3：The β that step 2 is calculatediIt is brought into formula (2)Using iterative method, step-length takes
0.001mm, | x |≤k, | y |≤k } in range, all Δs are calculated, until Δmin, calculate ΔminWhen corresponding offset coordinates
(x, y) is (0.050mm, -0.036mm).Prove that this method is reliable and stable.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
The scope of protection of the utility model is also should be regarded as into retouching.
Claims (10)
1. a kind of measuring device of rotating machinery beat amount, which is characterized in that be fixed at including center just more on rotor
Side shape magnetic disturbance portion is fixed at the magnet steel of rotor side, and is correspondingly arranged with the magnet steel and is located at rotor side
Inspection magnetic portion, the inspection magnetic portion includes magnetic induction loop, and the controller being connect with the magnetic induction loop.
2. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the magnetic disturbance portion is piece
Shape or bulk.
3. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the side of the regular polygon
It is processed circular arc chamfering with side junction.
4. the measuring device of rotating machinery beat amount as claimed in claim 3, which is characterized in that the half of one of rounded corner
Diameter is shorter than other, remaining rounding radii is identical.
5. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the magnet steel is located at inspection magnetic
Between portion and magnetic disturbance portion, the magnet steel between magnetic disturbance portion at a distance from 2-10mm.
6. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the magnet steel is neodymium iron boron
Magnet steel, ferrite magnetic steel, alnico magnet or iron B permanent magnetic material.
7. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the magnet steel is that the center of circle exists
Arc-shaped structure on the central shaft of the rotor, the rotating machinery are motor.
8. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the magnetic disturbance portion center
It is formed with through-hole, the rotor passes through the through-hole sandwich to position.
9. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the thickness in the magnetic disturbance portion
For degree in 3-5cm, the magnetic disturbance portion is hexagonal structure.
10. the measuring device of rotating machinery beat amount as described in claim 1, which is characterized in that the inspection magnetic portion is also wrapped
The voltage detection mechanism being connect with the magnetic induction loop is included, the voltage detection mechanism connects with the controller communication
It connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721492619.4U CN207610853U (en) | 2017-11-09 | 2017-11-09 | The measuring device of rotating machinery beat amount |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721492619.4U CN207610853U (en) | 2017-11-09 | 2017-11-09 | The measuring device of rotating machinery beat amount |
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| Publication Number | Publication Date |
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| CN207610853U true CN207610853U (en) | 2018-07-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765051A (en) * | 2017-11-09 | 2019-05-17 | 核工业理化工程研究院 | The measuring device and measuring method of rotating machinery beat amount |
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2017
- 2017-11-09 CN CN201721492619.4U patent/CN207610853U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765051A (en) * | 2017-11-09 | 2019-05-17 | 核工业理化工程研究院 | The measuring device and measuring method of rotating machinery beat amount |
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