CN105136277B - A kind of detection means and detection method of axle vibration sensor - Google Patents
A kind of detection means and detection method of axle vibration sensor Download PDFInfo
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- CN105136277B CN105136277B CN201510216718.9A CN201510216718A CN105136277B CN 105136277 B CN105136277 B CN 105136277B CN 201510216718 A CN201510216718 A CN 201510216718A CN 105136277 B CN105136277 B CN 105136277B
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a kind of detection means and detection method of axle vibration sensor, device includes metal base plate, motor is installed on metal base plate, motor respective side installs bearing, and major axis one end is installed with motor shaft, and the other end is installed on bearing, it is even on major axis to install three axle vibration sensor test plates away from fixation, installation hole slot is formed with metal base plate side, a right-angle side of angle bar frame is fixed on installation hole slot, axle vibration sensor mounting hole is formed with another right-angle side of angle bar frame.This method includes：Sensor is installed；Sensor alignment；Sensor is connected and opened；Three test plate measurements；By measurement data respectively compared with the equivalent peak peak vibration amplitude of three test plates, sensor states are judged.Most directly, most truly, the interference of introducing is minimum, and test effect is most reliable for the inventive method.Improve the checking ability to sensor.
Description
Technical field
The invention belongs to sensor signal inspection technology field, the detection means of particularly a kind of axle vibration sensor and detection
Method.
Background technology
Axle vibration sensor is a kind of measuring cell for measuring rotating machinery shaft amplitude.Axle amplitude refers to whirler
Tool rotary shaft is a kind of Relative Vibration relative to the vibration amplitude of bearing.It is rotating machinery especially steam turbine, generator etc.
The important Monitoring Data of the subsidiary engine such as Diagnosing System for Oil Pump or blower fan water pump, it is the key parameter for describing unit operation security, it is right
Safety monitoring in equipment day-to-day operation and fault diagnosis carried out when vibration fault occurs administer have highly important guidance
Meaning.This sensor has a wide range of applications in industrial circles such as thermal power plant, chemical plant.
The axle vibration sensor generally used in power industry at present is non-contact electric eddy sensor.Sensor Cheng Yuan
It is shaft-like, a diameter of 8mm.According to the different length of model from 10cm to 30cm, the full screw thread of outer surface car.Its one end is probe
Part, tens of megahertzs of high frequency electric can be produced so as to induce magnetic field in surrounding space, if nearby there is metal object
Then high frequency electric can be induced in metal surface by electromagnetic induction, the high frequency electric produces electromagnetism sense to probe again in turn
Should, sensor probe can receive the induced signal and by the variation characteristic of the signal know between metal object and probe away from
From change, when rotating shaft rotates at a high speed, sensor is exactly to find out the distance between rotating shaft and probe so as to obtain according to this principle
Obtain shaft vibration amplitude.The other end of sensor comes with signal wire and is used to connect fore-lying device receiving power supply and exports letter simultaneously
Number.
It some times happens that failure causes vibration amplitude to increase, this just needs to carry out live vibration monitoring work rotating machinery.
Carry out live vibration monitoring need by axle shake signal introduce data analyzer be observed.But many times due to sensor,
The reason such as fore-lying device failure or connecting wire short circuit, virtual connection, intense electromagnetic interference can cause the inaccurate situation of sensor measurement,
This will carry out safe condition on-line monitoring, vibrating failure diagnosis and dynamic balance running to us and causes extremely serious influence.
Therefore extremely it is necessary to design a kind of axle vibration sensor signal verification method, to examine the working condition of sensor whether normal.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, and to propose detection means and the detection of a kind of axle vibration sensor
Method.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of detection means of axle vibration sensor, the device include a metal bottom for acting each part that is connected
Plate, motor is fixed with the right side of metal base plate, is fixedly mounted with bearing in the respective side of motor, major axis one end and motor driving shaft are coaxial
To installation, the other end is installed on bearing, even on major axis to install tri- axle vibration sensor test plates of A, B and C away from fixation,
Metal base plate side is formed with two installation hole slots parallel to major axis, above installation hole slot, by being installed on two mounting holes
Bolt in groove fixes a right-angle side of right angled triangle angle bar frame, be formed with another right-angle side of angle bar frame with
The axle vibration sensor mounting hole of isometry position at major axis axle center.
Moreover, the external dimensions specification of three axles vibration sensor test plate is identical, using aluminum alloy material, outside
Portion's diameter is 100mm, thickness 10mm, wherein, the pilot hole systems of A test plates in circle disk center middle, B test plates
Pilot hole center deviates 50 μm with disc centre, and pilot hole center and the disc centre of C test plates deviate 100 μm.
Moreover, the motor is to determine frequency 5Hz motors.
A kind of detection method of axle vibration sensor detection means, including step are as follows：
(1) sensor is arranged on angle bar frame by bolt；
(2) by installing hole slot first by sensor alignment A test plates；
(3) connect the sensor to data collecting system and open test pattern；
(4) motor is started；
(5) measurement amplitude is read from collector after stable reading, it is another that sensor is then shifted into next test plate
The secondary reading after stable reading, until three test plate measurements finish；
(6) by measurement data respectively compared with the equivalent peak-peak vibration amplitude of tri- test plates of A, B and C, such as measure
Data peak-peak vibration amplitude is respectively less than prescribed limit, then it is assumed that working sensor is normal.
Moreover, the equivalent peak-peak vibration amplitude of described tri- test plates of A, B and C is respectively 0 μm, 100 μm and 200 μm.
The advantages and positive effects of the present invention are：
1st, the invention is characterized in that model rotor, which rotates, sends the method for actual physical vibration signal to examine sensor work
As state be in the current field it is original, this method most directly, it is most true, the interference of introducing is minimum, test effect
It is most reliable.
2nd, the inventive method cleverly simulates various amplitudes by carrying out eccentric rotary under low speed to rotating disk come quantitative
Under Vibration Condition it is achieved thereby that the more accurately checking to sensor under various amplitudes.Further increase to sensing
The checking ability of device..
Brief description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention；
Embodiment
Present invention implementation is further described below in conjunction with accompanying drawing, following examples are descriptive, are not to limit
Property, it is impossible to protection scope of the present invention is limited with this.
Due to vortex axle vibration sensor, its special measuring principle can only perceive metal object in the range of neighbouring one millimeter
Vibration amplitude, and the frequency of this vibration can not be too low, and otherwise sensor can not accurately measure the vibration amplitude of object.Cause
This can not realize the inspection to signal in the working site of vibration monitoring experiment using the simple approach of people's hand wobble sensor.
So present invention selection realizes real Vibration Condition using the method for simulating true rotor rotation, so as to reality
Physical quantity variation verifies the accuracy of axle vibration sensor test signal.
Simulation rotating machinery vibrating must be played if realizing the Vibration Condition of true rotor by means of some tool devices
Effect, be this this method in devise an easy rotating machinery simulator.As shown in figure 1, be the top view of the device,
The device includes the aluminum alloy materials bottom plate 1 that a size is 500mm × 300mm × 10mm, and it is each to primarily serve fixed and connection
The effect of part, including one determined frequency 5Hz motor 6, installed in the right of bottom plate, the work of rotary power is provided for playing
With, including an extension shaft 5, its one end be connected the other end with motor drive terminal and be fixed on bearing 2, including a sensor peace
Support 4 is filled, the support is welded into triangular structure of right angle using angle steel, and one of right-angle side is bolted to bottom by two
Translation can be realized on the installation hole slot 3 of plate, another right-angle side is towards extension shaft and horizontal with extension shaft center of circle identical
Opening position opens the circular hole of an a diameter of 12mm, equal for installation axle vibration sensor, in addition to tri- shape specifications, materials of A, B and C
Consistent test plate 7, these three disks use aluminum alloy material, and diameter is 100mm, thickness 10mm, and difference is A, B
And the central mounting hole position of tri- disks of C makes and is slightly different by finishing, wherein A test plate pilot hole systems are in circle
Heart middle, B test plate pilot hole centers deviate 50 μm with disc centre, the C test plate pilot hole center deviations center of circle 100
μm, these three test plates are by centre bore all on extension shaft.
A, the pilot hole of tri- test plates of B and C be produced on diverse location be in order to simulate the vibration amplitude of different amplitudes,
It it is approximately 0 μm to equivalent vibration amplitude caused by sensor when wherein A test plates rotate, B test plates are 100 μm equivalent
Peak-peak vibration amplitude, C test plates are 200 μm of equivalent peak-peak vibration amplitudes.It can so be realized using three test plates
Verified to commonly using high, medium and low three amplitude levels in the range of vibration amplitude, so as to comprehensively examine sensor each
Working condition in amplitude level.
As found to there is sensor signal to pass through the above when there is abnormal or suspection measurement data distortion in testing at the scene
Device is tested to it.Its method is as follows, 1, by sensor by bolt be arranged on device mounting bracket on；2nd, cunning is passed through
Road is first by sensor alignment A test plates；3rd, connect the sensor to data collecting system and open test pattern.4th, start
Motor.5th, measurement amplitude is read from collector after stable reading, sensor is then shifted into next test plate and treated again
Reading after stable reading, until three disk measurements finish.6th, by measurement data respectively compared with 0 μm, 100 μm, 200 μm
Think that sensor has problem if error is more than 20 μm, such as less than 20 μm are then thought that working sensor is normal.
Claims (5)
- A kind of 1. detection means of axle vibration sensor, it is characterised in that：The device acts each part that is connected including one Metal base plate, motor is fixed with the right side of metal base plate, bearing, extension shaft one end and motor are fixedly mounted with the respective side of motor The drive end connection other end is fixed on bearing, even on extension shaft to be coated with tri- axle vibration sensor tests of A, B and C away from fixed Disk, the external dimensions specification of three axles vibration sensor test plate is identical, and the pilot hole system of A test plates is justified in disk Heart middle, pilot hole center and 50 μm of disc centre deviation, the pilot hole center of C test plates and the disk of B test plates 100 μm of center deviation, two installation hole slots parallel to extension shaft are formed with metal base plate side, above installation hole slot, led to Cross be installed on two installation hole slot in bolts fix right angled triangle angle bar frames a right-angle side, angle bar frame it is another Individual right-angle side towards extension shaft and is being provided with circular hole with extension shaft center of circle identical horizontal position, and installation axle is shaken biography in circular hole Sensor, the axle vibration sensor are directed at A, B and C test plate by slideway successively.
- 2. the detection means of axle vibration sensor according to claim 1, it is characterised in that：Described tri- axles of A, B and C shake biography Sensor test plate uses aluminum alloy material, and outer dia is 100mm, thickness 10mm.
- 3. the detection means of axle vibration sensor according to claim 1, it is characterised in that：The motor is electric to determine frequency 5Hz Machine.
- A kind of 4. detection method of axle vibration sensor detection means, it is characterised in that：It is as follows including step：(1) sensor is arranged on angle bar frame by bolt；(2) by installing hole slot first by sensor alignment A test plates；(3) connect the sensor to data collecting system and open test pattern；(4) motor is started；(5) measurement amplitude is read from collector after stable reading, sensor is then shifted into next test plate and treated again Reading after stable reading, until three test plate measurements finish；(6) by measurement data respectively compared with the equivalent peak-peak vibration amplitude of tri- test plates of A, B and C, such as measurement data Peak-peak vibration amplitude is respectively less than prescribed limit, then it is assumed that working sensor is normal.
- 5. the detection method of axle vibration sensor detection means according to claim 4, it is characterised in that：Described A, B and C tri- The equivalent peak-peak vibration amplitude of individual test plate is respectively 0 μm, 100 μm and 200 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510216718.9A CN105136277B (en) | 2015-04-30 | 2015-04-30 | A kind of detection means and detection method of axle vibration sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510216718.9A CN105136277B (en) | 2015-04-30 | 2015-04-30 | A kind of detection means and detection method of axle vibration sensor |
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| CN105136277A CN105136277A (en) | 2015-12-09 |
| CN105136277B true CN105136277B (en) | 2018-03-06 |
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| CN106195593B (en) * | 2016-08-30 | 2018-02-13 | 上海应用技术学院 | A kind of installation displacement transducer is in the simple rack and its application method of main shaft |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU468154A1 (en) * | 1973-06-01 | 1975-04-25 | Предприятие П/Я П-6737 | Vibrometer |
| SU1101743A1 (en) * | 1983-01-27 | 1984-07-07 | Предприятие П/Я Р-6348 | Device for determination of speed non-uniformity in the limits of one shaft turn |
| CN203847934U (en) * | 2014-05-12 | 2014-09-24 | 国家电网公司 | Mounting bracket for shaft vibration sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3283138B2 (en) * | 1994-05-27 | 2002-05-20 | 曙ブレーキ工業株式会社 | Accelerometer |
-
2015
- 2015-04-30 CN CN201510216718.9A patent/CN105136277B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU468154A1 (en) * | 1973-06-01 | 1975-04-25 | Предприятие П/Я П-6737 | Vibrometer |
| SU1101743A1 (en) * | 1983-01-27 | 1984-07-07 | Предприятие П/Я Р-6348 | Device for determination of speed non-uniformity in the limits of one shaft turn |
| CN203847934U (en) * | 2014-05-12 | 2014-09-24 | 国家电网公司 | Mounting bracket for shaft vibration sensor |
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| CN105136277A (en) | 2015-12-09 |
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