CN106126840B - Rotating machinery revolving speed based on orbit of shaft center calculates device and method - Google Patents
Rotating machinery revolving speed based on orbit of shaft center calculates device and method Download PDFInfo
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- CN106126840B CN106126840B CN201610503412.6A CN201610503412A CN106126840B CN 106126840 B CN106126840 B CN 106126840B CN 201610503412 A CN201610503412 A CN 201610503412A CN 106126840 B CN106126840 B CN 106126840B
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- 238000004458 analytical method Methods 0.000 claims description 26
- 238000005259 measurement Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000000746 purification Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 5
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- 238000009434 installation Methods 0.000 abstract description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention discloses a kind of, and the rotating machinery revolving speed based on orbit of shaft center calculates device and method, displacement signal when acquiring rotor rotation in mutually perpendicular direction, and displacement signal is purified, obtain the purification orbit of shaft center of rotor, innovative calculating is carried out to the point on orbit of shaft center, to obtain the rotary speed information of rotating machinery.The present invention has selected orbit of shaft center to calculate rotor speed, and orbit of shaft center and revolving speed are connected, and provides new implementation method for the monitoring of rotating machinery revolving speed.The present invention is monitored revolving speed using orbit of shaft center simultaneously, the installation of speed probe can be reduced in engineer application, rotation speed monitoring can also be carried out according to orbit of shaft center in the place for being inconvenient to install speed probe, new measurement method is provided for engineer application, is had broad application prospects.
Description
Technical field
The invention belongs to field of mechanical technique, and in particular to a kind of rotating machinery revolving speed computing device based on orbit of shaft center
And the design of method.
Background technique
Revolving speed is an important characteristic parameters in energy device and dynamic power machine performance test, because dynamic power machine
Numerous characteristics parameter is determined according to the functional relation of they and revolving speed, such as the capacity of compressor, shaft power, internal combustion
Output power of machine etc., and the vibration of dynamic power machine, chimneying pulsation, various working parts state of wear etc. all with
Revolving speed is closely related.In industrial production and field of scientific study, revolving speed be influence product quality and research achievement factor it
One, it is one of important parameter of rotating machinery, the important of mechanical equipment health control is had become for the measurement monitoring of revolving speed
Research topic.
There are many method of tachometric survey, and the pattern of measuring instrumentss is also varied, and use condition and measurement accuracy are also each
It is not identical.Two major classes can be divided into according to the working method of tachometric survey: contact tachometer and non-contact type tachometric are surveyed
Measure instrument.The former must directly contact when in use with tested shaft, such as centrifugal tachometer, magnetic revolution counter and power generation of testing the speed
Machine etc.；The latter does not need to survey with tested shaft contacts, such as photoelectric tachometer, electronic digital type revolution counter, flash of light when in use
Fast instrument etc..
The method of tachometric survey arrives non-contact measurement (photo-electric, magnetic inductive) from contact type measurement (mechanical), then
Revolving speed is measured to using video technique, various measurement methods there are advantage and disadvantage, need to select suitable measurement when measuring revolving speed
Mode just can make the revolving speed measured be more nearly true value.
Summary of the invention
The purpose of the present invention is to solve lack using orbit of shaft center the method for calculating rotor speed in the prior art
The problem of, propose a kind of rotating machinery revolving speed calculating device and method based on orbit of shaft center.
The technical solution of the present invention is as follows: the rotating machinery revolving speed computing device based on orbit of shaft center, including shake table, signal
Collection analysis unit and computer digit signal analysis unit；Shake table, signal processing and analysis unit, computer digit signal point
Analysis unit is sequentially connected with.
Preferably, signal processing and analysis unit is connect with computer digit signal analysis unit by 1394 signal wires.
Preferably, signal processing and analysis unit includes signal gathering analysis meter and eddy current displacement sensor；Signal acquisition
Analyzer is connected to computer digit signal analysis unit, and eddy current displacement sensor is connected to shake table；Signal processing and analysis
It is connected between instrument and eddy current displacement sensor by signal wire.
Preferably, computer digit signal analysis unit includes low-pass filter and mathematical computations interpretation software
MATLAB。
The present invention also provides the rotating machinery revolving speed calculation methods based on orbit of shaft center, comprising the following steps:
S1, operation rotating machinery make it work under declared working condition；
S2, the displacement signal in eddy current displacement sensor measurement rotor orthogonal directions is utilized；
S3, displacement signal is filtered using low-pass filter, obtains the main component in signal；
S4, orbit of shaft center is synthesized using filtered displacement signal, each point is relative to level side on calculating orbit of shaft center
Upward angle；
S5, periodicity analysis is carried out to the angle acquired, calculates the revolving speed of rotor.
Further, the revolving speed of rotating machinery changes at random in step S1.
Further, step S3 specifically:
Fourier transform is carried out to collected displacement signal, analyzes main frequency content therein, and utilize low
Bandpass filter filters out the main component in displacement signal.
Further, the value range that angle is acquired in step S4 is -90 °~90 °.
Further, step S5 specifically:
An angle is reference angle in selected step S4, and reference angle of every appearance in one period of variable angle, is denoted as one
Pulse signal；Two pulse signal rotors of every appearance rotate a circle；Tach signal can be acquired according to pulse signal obtained.
The beneficial effects of the present invention are:
(1) present invention has selected orbit of shaft center to calculate rotor speed, and orbit of shaft center and revolving speed are connected,
New implementation method is provided for the monitoring of rotating machinery revolving speed.
(2) present invention is monitored revolving speed using orbit of shaft center, and speed probe can be reduced in engineer application
Installation, rotation speed monitoring can also be carried out according to orbit of shaft center in the place for being inconvenient to install speed probe, be answered for engineering
With new measurement method is provided, have broad application prospects.
Detailed description of the invention
Fig. 1 is the rotating machinery revolving speed computing device structure block diagram provided by the invention based on orbit of shaft center.
Fig. 2 is the pictorial diagram of the eddy current displacement sensor of the embodiment of the present invention.
Fig. 3 is that the rotating machinery revolving speed provided by the invention based on orbit of shaft center calculates method flow diagram.
Fig. 4 is that the revolving speed that the rotating machinery of the embodiment of the present invention applies sets figure.
Fig. 5 is that the baseline rotor of the embodiment of the present invention is horizontal, the displacement signal figure on vertical direction.
Fig. 6 is the original Chart of axes track of the embodiment of the present invention.
Fig. 7 is the Fourier transform spectrogram of displacement signal in the rotor horizontal direction of the embodiment of the present invention.
Fig. 8 is the rotor level after the purification of the embodiment of the present invention, the displacement signal figure on vertical direction.
Fig. 9 is the Chart of axes track after the purification of the embodiment of the present invention.
Figure 10 be the embodiment of the present invention orbit of shaft center on every relative to horizontal direction on angle schematic diagram.
Figure 11 is the rotor speed schematic diagram of the embodiment of the present invention being calculated by orbit of shaft center.
Specific embodiment
The embodiment of the present invention is further described with reference to the accompanying drawing.
The present invention provides a kind of rotating machinery revolving speed computing device based on orbit of shaft center, as shown in Figure 1, including vibration
Platform, signal processing and analysis unit and computer digit signal analysis unit.Shake table, signal processing and analysis unit, computer number
Word signal analysis unit is sequentially connected with.
Wherein, signal processing and analysis unit is connect with computer digit signal analysis unit by 1394 signal wires.
Signal processing and analysis unit includes signal gathering analysis meter and eddy current displacement sensor, for acquiring rotor displacement
Signal.Signal gathering analysis meter is connected to computer digit signal analysis unit, and eddy current displacement sensor is connected to shake table；
It is connected between signal gathering analysis meter and eddy current displacement sensor by signal wire.The in kind of eddy current displacement sensor is such as schemed
Shown in 2.
Computer digit signal processing and analysis unit includes low-pass filter and mathematical computations interpretation software MATLAB,
For being purified to orbit of shaft center.
The rotating machinery revolving speed calculation method based on orbit of shaft center that the present invention also provides a kind of, as shown in figure 3, include with
Lower step:
S1, operation rotating machinery make it work under declared working condition.
Wherein, declared working condition includes different revolving speed and acceleration, and is changed over time.In the embodiment of the present invention, such as
Shown in Fig. 4, in order to make case be more nearly practical engineering application, setting speed accelerates to 30r/s by 0r/s is even in 10s, protects
5s is held, is decelerated to 0r/s using 10s is even.
S2, the displacement in eddy current displacement sensor measurement rotor orthogonal directions is utilized.
Orbit of shaft center needs orthogonal two eddy current displacement sensors to measure.In the embodiment of the present invention, in order to
It is easily installed, in the horizontal and vertical directions by sensor installation.Collected displacement signal is as shown in figure 5, horizontal and vertical
The displacement signal in direction is cosine and sine signal.The orbit of shaft center synthesized by collected displacement signal is as shown in Figure 6, it can be seen that
There are many spikes on orbit of shaft center, cannot be used directly to carry out revolving speed calculating.
S3, displacement signal is filtered using low-pass filter, obtains the main component in signal.
In the embodiment of the present invention, by Fourier transform, the major frequency components of collected signal are analyzed, it is then sharp
It is purified with low-pass filter, obtains the main component of displacement signal.
The spectrogram of signal is obtained by Fourier transform as shown in fig. 7, can analyze out the main frequency in signal
Ingredient is 0Hz -30Hz, the signal of 30Hz frequency content below is then filtered out using low-pass filter, as shown in Figure 8.
S4, orbit of shaft center is synthesized using filtered displacement signal, each point is relative to level side on calculating orbit of shaft center
Upward angle.
It can be seen that orbit of shaft center is quasi-periodic vibration by the Chart of axes track after purification, be similar to circumferential cycle.
Around orbit of shaft center one week, the point on orbit of shaft center and the angle in horizontal direction will be changed to point on orbit of shaft center by 0 °
360°。
Fig. 9 is the Chart of axes track after purification, and it is smoothed to compare the orbit of shaft center that Fig. 9 and Fig. 6 can be seen that after purification
, angle calculation can be carried out.Figure 10 is the angle on point and horizontal direction on orbit of shaft center, as seen from Figure 10, folder
Angle recycles between -90 °~90 °.
S5, it carries out periodicity analysis and calculates the revolving speed of rotor to acquiring angle.
Since the variable angle range acquired is -90 °~90 °, the angle acquired passes through two cyclic rotor axle center
Track recycles one week.An angle is reference angle in selected step S4, such as 30 °, then it is every occur one time 30 °, variable angle one
Period is denoted as a pulse signal.It is assumed that revolving speed of the rotor in a circle is certain, then two pulse signal rotors of every appearance
It rotates a circle.The revolving speed of rotor within the time period can be calculated according to the initial time in pulse signal every two period.
Revolving speed in each period is smoothly connected to revolving speed of the rotor just obtained within the whole service time.
Figure 11 is the rotor speed calculated by orbit of shaft center, compares Figure 11 and Fig. 4 and can be seen that and calculates
Revolving speed and actual revolving speed are almost the same, illustrate that it is feasible that revolving speed is calculated by orbit of shaft center.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (4)
1. the rotating machinery revolving speed calculation method based on orbit of shaft center, which comprises the following steps:
S1, operation rotating machinery make it work under declared working condition；
S2, the displacement signal in eddy current displacement sensor measurement rotor orthogonal directions is utilized；
S3, displacement signal is filtered using low-pass filter, obtains the main component in signal；
S4, using filtered displacement signal synthesize orbit of shaft center, calculate orbit of shaft center on each point relative to horizontal direction on
Angle；
S5, periodicity analysis is carried out to the angle acquired, calculates the revolving speed of rotor；Step S5 specifically:
An angle is reference angle in selected step S4, reference angle of every appearance, and one period of variable angle is denoted as a pulse
Signal；Two pulse signal rotors of every appearance rotate a circle；Tach signal can be acquired according to pulse signal obtained.
2. rotating machinery revolving speed calculation method according to claim 1, which is characterized in that rotating machinery in the step S1
Revolving speed change at random.
3. rotating machinery revolving speed calculation method according to claim 1, which is characterized in that the step S3 specifically:
Fourier transform is carried out to collected displacement signal, analyzes main frequency content therein, and utilize low pass filtered
Wave device filters out the main component in displacement signal.
4. rotating machinery revolving speed calculation method according to claim 1, which is characterized in that acquire angle in the step S4
Value range be -90 °~90 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610503412.6A CN106126840B (en) | 2016-06-29 | 2016-06-29 | Rotating machinery revolving speed based on orbit of shaft center calculates device and method |
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| CN201610503412.6A CN106126840B (en) | 2016-06-29 | 2016-06-29 | Rotating machinery revolving speed based on orbit of shaft center calculates device and method |
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| CN106126840A CN106126840A (en) | 2016-11-16 |
| CN106126840B true CN106126840B (en) | 2019-05-21 |
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| CN111487433B (en) * | 2020-04-22 | 2022-06-21 | 河南科技大学 | Bearing retainer slip rate measuring method, and rotating speed measuring method, device and system |
| CN114814268B (en) * | 2022-04-13 | 2024-06-21 | 南京磁之汇电机有限公司 | Motor rotation speed acquisition method, device, system and computer readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7447555B2 (en) * | 2005-07-06 | 2008-11-04 | Skorepa Bradley J | Method for engineering a control system |
| CN102590543A (en) * | 2012-02-24 | 2012-07-18 | 中国汽车技术研究中心 | Rotary speed measuring device and rotary speed measuring method |
| CN102663261A (en) * | 2012-04-27 | 2012-09-12 | 长安大学 | Method for extracting rotating machinery rotor shaft centerline orbit by using time-frequency slice technology |
| CN103308707A (en) * | 2013-05-21 | 2013-09-18 | 中国科学院自动化研究所 | Self-adaptation rotating speed measurement method |
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2016
- 2016-06-29 CN CN201610503412.6A patent/CN106126840B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7447555B2 (en) * | 2005-07-06 | 2008-11-04 | Skorepa Bradley J | Method for engineering a control system |
| CN102590543A (en) * | 2012-02-24 | 2012-07-18 | 中国汽车技术研究中心 | Rotary speed measuring device and rotary speed measuring method |
| CN102663261A (en) * | 2012-04-27 | 2012-09-12 | 长安大学 | Method for extracting rotating machinery rotor shaft centerline orbit by using time-frequency slice technology |
| CN103308707A (en) * | 2013-05-21 | 2013-09-18 | 中国科学院自动化研究所 | Self-adaptation rotating speed measurement method |
Non-Patent Citations (2)
| Title |
|---|
| 《基于LabVIEW的转子轴心轨迹监测***设计》;焦川等;《兵工自动化》;20070228;第26卷(第2期);第37-38页 * |
| 《曲轴轴承轴心轨迹测试及分析研究》;易太连等;《内燃机车》;20100731;第8-11页 * |
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