CN105136277A - Detection device and detection method for shaft vibration sensor - Google Patents
Detection device and detection method for shaft vibration sensor Download PDFInfo
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- CN105136277A CN105136277A CN201510216718.9A CN201510216718A CN105136277A CN 105136277 A CN105136277 A CN 105136277A CN 201510216718 A CN201510216718 A CN 201510216718A CN 105136277 A CN105136277 A CN 105136277A
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Abstract
The invention relates to a detection device and a detection method for a shaft vibration sensor. The device comprises a metal bottom board, wherein the metal bottom board is equipped with a motor, a corresponding side of the motor is equipped with a bearing, one end of a long shaft is equipped with a motor shaft, the other end of the long shaft penetrates through the bearing, the long shaft is fixed with and penetrated by three shaft vibration sensor test discs with equal intervals, one side of the metal bottom board is provided with a mounting hole groove, the mounting hole groove is fixed with a right-angle side of an angle steel bracket, and another right-angle side of the angle steel bracket is provided with a shaft vibration sensor mounting hole. The detection method comprises steps that, the sensor is aligned; the sensor is connected and starts; the three test discs are used for measurement; the measurement data is respectively contrasted with equivalent peak-peak vibration amplitudes of the three test discs to determine the state of the sensor. The method is the most direct and real method, introduces the minimum interference and has the most reliable detection effect, and capability of verification on the sensor is improved.
Description
Technical field
The invention belongs to sensor signal inspection technology field, particularly a kind of pick-up unit of axle vibration sensor and detection method.
Background technology
Axle vibration sensor is used to a kind of measuring sensor measuring rotating machinery shaft amplitude.Axle amplitude refers to the vibration amplitude of rotating machinery turning axle relative to bearing, is a kind of Relative Vibration.It is the important Monitoring Data of the rotating machinery especially subsidiary engine such as the Diagnosing System for Oil Pump such as steam turbine, generator or blower fan water pump, be the key parameter describing unit operation security, carrying out fault diagnosis improvement to the safety monitoring in equipment day-to-day operation and when there is vibration fault has very important directive significance.This sensor has a wide range of applications at the industrial circle such as thermal power plant, chemical plant.
The axle vibration sensor generally used in power industry is at present non-contact electric eddy sensor.This sensor becomes round bar shape, and diameter is 8mm.According to the different length of model from 10cm to 30cm not etc., the full screw thread of outside surface car.Its one end is probe segment, can produce tens of megahertz high-frequency current thus around space internal induction go out magnetic field, if near have metal object; high-frequency current could be induced by electromagnetic induction in metal surface, this high-frequency current produces electromagnetic induction to probe conversely again, sensor probe can receive this induced signal and know that the distance between metal object and probe changes by the variation characteristic of this signal, and when rotating shaft High Rotation Speed, sensor is found out the distance between rotating shaft and probe according to this principle thus obtained shaft vibration amplitude.The other end of sensor carries signal wire and accepts power supply for connecting fore-lying device and output signal simultaneously.
Rotating machinery breaks down sometimes and causes vibration amplitude to increase, and this just needs to carry out on-the-spot vibration monitoring work.Carry out the on-the-spot vibration monitoring signal that needs axle to shake to introduce data analyzer and observe.But many times because the reasons such as sensor, fore-lying device fault or the short circuit of connection wire, virtual connection, intense electromagnetic interference can cause the inaccurate situation of sensor measurement, this causes extremely serious impact by carrying out safe condition on-line monitoring, vibrating failure diagnosis and dynamic balance running to us.Therefore be extremely necessary to design a kind of axle vibration sensor signal verification method, whether normal with the working condition of test sensors.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose a kind of pick-up unit and detection method of axle vibration sensor.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of pick-up unit of axle vibration sensor, this device comprises one and works the metal base plate being connected and fixed each parts effect, motor is fixed with on the right side of metal base plate, bearing is fixedly mounted with in the respective side of motor, major axis one end and the coaxial installation of motor driving shaft, the other end is installed on bearing, on major axis, even distance fixedly installs A, B and C tri-axle vibration sensor test plates, the installation hole slot that two are parallel to major axis is shaped with in metal base plate side, above installation hole slot, a right-angle side of right-angle triangle angle bar frame is fixed by being installed on two bolts installed in hole slot, another right-angle side of angle bar frame is shaped with the axle vibration sensor mounting hole with major axis axle center place isometry position.
And, the external dimensions specification of described three axle vibration sensor test plates is identical, all adopt aluminum alloy material, outer dia is 100mm, thickness 10mm, wherein, the pilot hole of A test plate is built in circle disk center middle, the pilot hole center of B test plate and disc centre depart from 50 μm, and the pilot hole center of C test plate and disc centre depart from 100 μm.
And described motor is fixed 5Hz motor frequently.
A detection method for axle vibration sensor pick-up unit, comprises step as follows:
(1) sensor is arranged on angle bar frame by bolt;
(2) by installing hole slot first by sensor alignment A test plate;
(3) sensor be connected to data acquisition system (DAS) and open test pattern;
(4) starter motor;
(5) after stable reading, read measurement amplitude from collector, then sensor is changed to next test plate reading after stable reading again, until three test plates are measured complete;
(6) measurement data is compared with A, B and C tri-test plate equivalence peak-peak vibration amplitudes respectively, as measurement data peak-peak vibration amplitude is all less than specialized range, then think that working sensor is normal.
And the equivalent peak-peak vibration amplitude of described A, B and C tri-test plates is respectively 0 μm, 100 μm and 200 μm.
Advantage of the present invention and good effect are:
1, by taking model rotor to rotate the method sending actual physical vibration signal, to carry out test sensors duty be original in this field at present in the present invention, this method the most directly, the truest, the interference of introducing is minimum, and test effect is the most reliable.
2, the inventive method carrys out quantitative simulating the Vibration Condition under various amplitude thus achieve more accurate to the checking of sensor under various amplitude by carrying out eccentric rotary under low speed to rotating disk cleverly.Further increase the checking ability to sensor.。
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention;
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Because its special measuring principle of eddy current axle vibration sensor can only the vibration amplitude of metal object within the scope of a millimeter near perception, and the frequency of this vibration can not be too low, otherwise sensor cannot measure the vibration amplitude of object accurately.Therefore in the inspection that the working site of vibration monitoring test cannot adopt the simple approach of people's hand wobble sensor to realize signal.So the present invention selects the method adopting Reality simulation rotor to rotate to realize real Vibration Condition, thus the accuracy of axle vibration sensor test signal can be verified with the physical quantity variation of reality.
If the Vibration Condition realizing true rotor must play the effect of simulation rotating machinery vibrating by means of some tool devices, in this method, devise an easy rotating machinery simulator for this reason.As shown in Figure 1, for the vertical view of this device, this device comprises the aluminum alloy materials base plate 1 that is of a size of 500mm × 300mm × 10mm, mainly play effect that is fixing and connecting components, comprise a fixed 5Hz motor 6 frequently, be arranged on the right of base plate, for playing the effect providing rotary power, comprise an extension shaft 5, its one end is connected the other end and is fixed on bearing 2 with motor drive terminal, comprise a mounting frame for sensor 4, this support uses angle steel to be welded into triangular structure of right angle, one of them right-angle side is bolted on the installation hole slot 3 of base plate can be realized translation by two, another right-angle side is towards extension shaft and open in the horizontal position identical with the extension shaft center of circle circular hole that a diameter is 12mm, for installation shaft vibration sensor, also comprise A, B and C tri-shape specification, the test plate 7 that material is all consistent, these three disks all adopt aluminum alloy material, diameter is 100mm, thickness 10mm, difference is A, the central mounting hole position of B and C tri-disks is slightly different through finishing making, wherein A test plate pilot hole is built in middle, the center of circle, B test plate pilot hole center and disc centre depart from 50 μm, 100 μm, the C test plate pilot hole misalignment center of circle, these three test plates are all arranged on extension shaft by center pit.
It is vibration amplitude in order to simulate different amplitude that the pilot hole of A, B and C tri-test plates is produced on diverse location, when wherein A test plate rotates, 0 μm is approximately to the equivalent vibration amplitude that sensor produces, B test plate is 100 μm of equivalent peak-peak vibration amplitudes, and C test plate is 200 μm of equivalent peak-peak vibration amplitudes.Such employing three test plates can realize verifying high, medium and low three amplitude level within the scope of conventional vibration amplitude, thus the comprehensive working condition of test sensors in each amplitude level.
It is tested by above device as found that there is when abnormal or suspection measurement data distortion appear in sensor signal in test at the scene.Its method is as follows, and 1, sensor is arranged on the mounting bracket of device by bolt; 2, by slideway first by sensor alignment A test plate; 3, sensor be connected to data acquisition system (DAS) and open test pattern.4, starter motor.5, after stable reading, read measurement amplitude from collector, then sensor is changed to next test plate reading after stable reading again, until three disks are measured complete.If 6, measurement data is compared error more than 20 μm with 0 μm, 100 μm, 200 μm respectively, thinking that sensor has problems, then thinking that working sensor is normal as being less than 20 μm.
Claims (5)
1. the pick-up unit of an axle vibration sensor, it is characterized in that: this device comprises one and works the metal base plate being connected and fixed each parts effect, motor is fixed with on the right side of metal base plate, bearing is fixedly mounted with in the respective side of motor, major axis one end and the coaxial installation of motor driving shaft, the other end is installed on bearing, on major axis, even distance fixedly installs A, B and C tri-axle vibration sensor test plates, the installation hole slot that two are parallel to major axis is shaped with in metal base plate side, above installation hole slot, a right-angle side of right-angle triangle angle bar frame is fixed by being installed on two bolts installed in hole slot, another right-angle side of angle bar frame is shaped with the axle vibration sensor mounting hole with major axis axle center place isometry position.
2. the pick-up unit of axle vibration sensor according to claim 1, it is characterized in that: the external dimensions specification of described three axle vibration sensor test plates is identical, all adopt aluminum alloy material, outer dia is 100mm, thickness 10mm, wherein, the pilot hole of A test plate is built in circle disk center middle, the pilot hole center of B test plate and disc centre depart from 50 μm, and the pilot hole center of C test plate and disc centre depart from 100 μm.
3. the pick-up unit of axle vibration sensor according to claim 1, is characterized in that: described motor is fixed 5Hz motor frequently.
4. a detection method for axle vibration sensor pick-up unit, is characterized in that: comprise step as follows:
(1) sensor is arranged on angle bar frame by bolt;
(2) by installing hole slot first by sensor alignment A test plate;
(3) sensor be connected to data acquisition system (DAS) and open test pattern;
(4) starter motor;
(5) after stable reading, read measurement amplitude from collector, then sensor is changed to next test plate reading after stable reading again, until three test plates are measured complete;
(6) measurement data is compared with A, B and C tri-test plate equivalence peak-peak vibration amplitudes respectively, as measurement data peak-peak vibration amplitude is all less than specialized range, then think that working sensor is normal.
5. the detection method of axle vibration sensor pick-up unit according to claim 4, is characterized in that: the equivalent peak-peak vibration amplitude of described A, B and C tri-test plates 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 true CN105136277A (en) | 2015-12-09 |
| CN105136277B CN105136277B (en) | 2018-03-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195593A (en) * | 2016-08-30 | 2016-12-07 | 上海应用技术学院 | One energy right angle setting displacement transducer is in the simple rack of polymorphic type main shaft |
Citations (4)
| 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 |
| JPH07318577A (en) * | 1994-05-27 | 1995-12-08 | Akebono Brake Ind Co Ltd | Acceleration measuring unit |
| CN203847934U (en) * | 2014-05-12 | 2014-09-24 | 国家电网公司 | Mounting bracket for shaft vibration sensor |
-
2015
- 2015-04-30 CN CN201510216718.9A patent/CN105136277B/en active Active
Patent Citations (4)
| 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 |
| JPH07318577A (en) * | 1994-05-27 | 1995-12-08 | Akebono Brake Ind Co Ltd | Acceleration measuring unit |
| CN203847934U (en) * | 2014-05-12 | 2014-09-24 | 国家电网公司 | Mounting bracket for shaft vibration sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195593A (en) * | 2016-08-30 | 2016-12-07 | 上海应用技术学院 | One energy right angle setting displacement transducer is in the simple rack of polymorphic type main shaft |
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| CN105136277B (en) | 2018-03-06 |
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