CN114739505A - Detection system and method for shaft vibration sensor with clamping piece - Google Patents
Detection system and method for shaft vibration sensor with clamping piece Download PDFInfo
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- CN114739505A CN114739505A CN202210265852.8A CN202210265852A CN114739505A CN 114739505 A CN114739505 A CN 114739505A CN 202210265852 A CN202210265852 A CN 202210265852A CN 114739505 A CN114739505 A CN 114739505A
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a system and a method for detecting a shaft vibration sensor with a clamping piece, wherein a standard vibration sensor is positioned on a vibrating table, a bracket is fixed on the vibrating table, the shaft vibration sensor is positioned on the bracket, a shaft vibration metal disc is positioned on the standard vibration sensor, the shaft vibration sensor is connected with a clamping piece computer software system through a preamplifier, a rack and the clamping piece, the clamping piece is positioned at a measured point of the rack, the preamplifier is connected with a direct current voltage stabilizing source and a digital multimeter, the vibrating table is connected with a vibration controller through a power amplifier, the vibration controller is connected with the standard vibration sensor, the vibration controller is connected with a comparison method computer software system, and the system and the method can accurately realize the detection of the shaft vibration sensor with the clamping piece.
Description
Technical Field
The invention relates to a detection system and a detection method, in particular to a detection system and a detection method for a shaft vibration sensor with a clamping piece.
Background
The vibration amplitude in the unit operation is an important index of the unit safety and economic operation. The excessively strong vibration means that the unit has serious defects, and the large vibration amplitude can cause many hazards, such as instability of a speed regulating system and further accidents of the speed regulating system; the bearing black gold is broken, and the fastening screw is loosened and broken; the excitation part of the generator is loosened and damaged, even the foundation of the generator set is damaged, and further vibration is intensified; the fatigue resistance of the rotating parts is reduced, and further, the blades, the wheel discs and the like are damaged; end shaft seal abrasion; wear of the sliding pin; the steam seal of the partition plate is abraded; malfunction of a crisis-breaker, etc. Therefore, the vibration condition of the bearing must be strictly monitored in the process of starting, stopping and running the unit, and the equipment and personal safety of the unit are protected.
Generally, a user of the unit equipment sends the shaft vibration sensor part to a laboratory for detection before the shaft vibration sensor and the clamping piece are installed or during overhaul, and the matched clamping piece is hardly confirmed in metering performance and use parameters, so that the technical requirements of field practical application are ignored, and defects and uncertainties exist in the accuracy and the protection of the turbine monitoring system.
Accurate measurement of the shaft vibration sensor with the clamping piece and sending of correct protection actions are of great importance to safe and stable operation of the unit, so that integral detection of the shaft vibration sensor with the clamping piece has important significance for practical application of the shaft vibration sensor with the clamping piece.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for detecting the clamping piece of the shaft vibration sensor, which can accurately detect the clamping piece of the shaft vibration sensor.
In order to achieve the purpose, the detection system with the clamping piece for the shaft vibration sensor comprises a standard vibration sensor, a vibration controller, a power amplifier, a vibration table, the shaft vibration sensor, a preamplifier, a clamping piece, a rack, a comparison computer software system, a clamping piece computer software system, a direct-current voltage stabilizing source, a digital multimeter, a shaft vibration metal disc and a bracket;
the standard vibration sensor is positioned on the vibrating table, the support is fixed on the vibrating table, the shaft vibration sensor is positioned on the support, the shaft vibration metal disc is positioned on the standard vibration sensor, the shaft vibration sensor is connected with the clamping piece computer software system through the preamplifier, the rack and the clamping piece, the clamping piece is positioned at the measured point of the rack, the preamplifier is connected with the direct current voltage stabilizing source and the digital multimeter, the vibrating table is connected with the vibration controller through the power amplifier, the vibration controller is connected with the standard vibration sensor, and the vibration controller is connected with the comparison method computer software system.
And the standard vibration sensor is connected with the vibration controller through a cable.
The vibration controller is a dynamic signal analyzer.
The shaft vibration metal disc is rigidly arranged above the standard vibration sensor, and the shaft vibration sensor is fixed on the bracket capable of adjusting the initial gap in a non-contact mode.
The shaft vibration sensor is connected with the preamplifier through a cable.
The output cable of a standard vibration sensor is fixed in an S-wound manner.
The gap voltage between the shaft vibration sensor and the shaft vibration metal disc is measured to be-10V or-12V by a digital multimeter.
The invention discloses a method for detecting a shaft vibration sensor with a clamping piece, which comprises the following steps:
1) the card member computer software system acquires an output value of the card member, and the comparison method computer software system acquires a vibration signal of the standard vibration sensor;
2) calculating the relative error of each measured point of the clamping piece according to the output value of the clamping piece and the vibration signal of the standard vibration sensor;
3) and adjusting the clamping piece according to the relative error of each measured point of the clamping piece.
The invention has the following beneficial effects:
when the system and the method for detecting the shaft vibration sensor with the clamping piece are operated specifically, a clamping piece computer software system acquires an output value of the clamping piece, a comparison method computer software system acquires a vibration signal of a standard vibration sensor, relative errors of all measured points of the clamping piece are calculated according to the output value of the clamping piece and the vibration signal of the standard vibration sensor, and the clamping piece is adjusted according to the relative errors of all the measured points of the clamping piece, so that the vibration condition of a bearing is accurately measured, correct protection actions are sent out, and the safe operation of a generator set device is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a standard vibration sensor, 2 is a vibration controller, 2, 3 is a power amplifier, 4 is a vibration table, 5 is an axial vibration sensor, 6 is a preamplifier, 7 is a clamping piece, 8 is a frame, 9 is a comparison computer software system, 10 is a clamping piece computer software system, 11 is a direct current voltage stabilizing source, 12 is a digital multimeter, 13 is an axial vibration metal disc and 14 is a bracket.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and do not limit the scope of the disclosure of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the detection system of the shaft vibration sensor with clamping piece of the invention comprises a standard vibration sensor 1, a vibration controller 2, a power amplifier 3, a vibration table 4, a shaft vibration sensor 5, a preamplifier 6, a clamping piece 7, a frame 8, a comparison method computer software system 9, a clamping piece computer software system 10, a direct current voltage stabilizing source 11, a digital multimeter 12, a shaft vibration metal disc 13 and a bracket 14;
the standard vibration sensor 1 is positioned on a vibrating table 4, a bracket 14 is fixed on the vibrating table 4, a shaft vibration sensor 5 is positioned on the bracket 14, a shaft vibration metal disc 13 is positioned on the standard vibration sensor 1, the shaft vibration sensor 5 is connected with a clamping piece computer software system 10 through a preamplifier 6, a frame 8 and a clamping piece 7, the clamping piece 7 is positioned at a measured point of the frame 8, the preamplifier 6 is connected with a direct-current voltage stabilizing source 11 and a digital multimeter 12, the vibrating table 4 is connected with a vibration controller 2 through a power amplifier 3, the vibration controller 2 is connected with the standard vibration sensor 1, and the vibration controller 2 is connected with a comparison method computer software system 9;
wherein, the shaft vibration metal disc 13 is arranged above the standard vibration sensor 1, and the shaft vibration sensor 5 is arranged on a bracket 14 which can adjust the initial clearance; the standard vibration sensor 1 is connected with the vibration controller 2 through a cable, the vibration controller 2 is a dynamic signal analyzer, a shaft vibration metal disc 13 is rigidly arranged above the standard vibration sensor 1, the shaft vibration sensor 5 is fixed on a bracket 14 with good rigidity and adjustable initial clearance in a non-contact mode, and the shaft vibration sensor 5 is connected with the preamplifier 6 through the cable; the output cable of the standard vibration sensor 1 is fixed in an S-shaped winding mode, so that severe shaking, collision and friction phenomena during measurement are prevented; the shaft vibration sensor 5 is fixed on a support 14 which has good rigidity and can adjust the initial gap in a non-contact mode, so that the gap voltage between the shaft vibration sensor 5 and the shaft vibration metal disc 13 can be measured to be-10V or-12V through the digital multi-purpose meter 12.
The specific working process of the invention is as follows:
a vibration signal source is provided for the vibrating table 4 through the vibration controller 2 and the power amplifier 3, the card piece computer software system 10 obtains an output value of the card piece 7, and the comparison method computer software system 9 obtains a vibration signal detected by the standard vibration sensor 1;
during detection, 24V power supply is provided for the preamplifier 6 through the direct-current voltage stabilizing source 11, and then the bracket 14 is adjusted, so that the gap voltage between the shaft vibration sensor 5 and the shaft vibration metal disc 13, which is measured by the digital multimeter 12, is-10V or-12V;
and (3) amplitude linearity detection: selecting a working reference frequency point of 55Hz, sequentially setting vibration amplitudes of 20 micrometers, 50 micrometers, 100 micrometers, 150 micrometers, 200 micrometers, 250 micrometers, 300 micrometers and 350 micrometers, converting the vibration amplitudes once, and recording the actual output amplitude and the current signal output value of the clamping piece 7 after the vibration amplitudes are stabilized;
frequency response detection: selecting a constant value of the vibration amplitude of 100 micrometers, sequentially setting frequencies of 10Hz, 20Hz, 40Hz, 50Hz, 60Hz, 80Hz and 100Hz, and recording the actual output amplitude and the current signal output value of the clamping piece 7 after the clamping piece is stabilized at each frequency point;
and (3) detecting an alarm value protection action value: under the reference frequency point of 55Hz (avoiding power frequency), corresponding standard voltage and displacement signals are given to the vibration table 4, and the output value and the standard output value of the alarm state and the protection action state of the clamping piece 7 are recorded according to the display of an indicator lamp of the clamping piece 7.
Calculating the relative measurement error of the clamping piece 7, adjusting the clamping piece 7 according to the relative measurement error of the clamping piece 7, wherein,
wherein, the relative error of the amplitude linearity is:
the relative error of the frequency response is:
the current output relative error is:
wherein, Δ xLRelative error, x, of each measured point of the card 7iIndicating values, x, of measured points of the clamping piece 70Is a preset standard value, Δ xfRelative error, x, of each measured point of the card 7iIndicating values, x, of measured points of the clamping piece 7rIs a standard value of the card member 7 at a certain reference frequency point, and Delta A is a relative error of current output of each measured point of the card member 7, AiFor the output value of each measured point of the clamping piece 7, A0Is the output standard value of the clamping piece 7.
And adjusting the output of the clamping piece 7 according to the relative measurement error of the clamping piece 7.
When the relative measurement error is in the maximum allowable error range, the alarm value and the protection action value of the clamping piece 7 meet the field application requirement.
The card member 7 determines the measured points according to the measuring range, the measured points are uniformly distributed as much as possible according to the measuring range, the measured points cover the measured points required by the actual work and the protection action of the site, the vibration controller 2 and the power amplifier 3 provide a measuring vibration source according to the determined measured points, and after stabilization, the comparison method computer software system 9 and the card member computer software system 10 respectively collect the standard value and the measured value of the card member 7 at each measured point.
The amplitude linearity, the frequency response and the relative error of the current output of the clamping piece 7 meet the technical index of +/-5 percent;
the alarm value and the protection action value of the vibration setting of the bearing of the common unit of 300MW, 600MW and the like in the field practical application are respectively 125 microns and 250 microns, the standard voltage and the displacement value under the alarm and protection action display state of the clamping piece 7 and the output current and the displacement value of the clamping piece 7 are recorded as the alarm value and the protection action value by adjusting the output voltage value of the vibration controller 2 under the reference frequency point of 55Hz, so that the alarm and protection action display state of the clamping piece 7 is ensured to be correct, no non-display or error display phenomenon exists, and the alarm value and the protection action value accord with the technical index requirements of the field practical application.
The invention is characterized in that:
whether the amplitude linearity, the frequency response and the relative measurement error of current output of the axial vibration sensor with the clamping piece exceed the maximum allowable error value or not can be accurately judged;
whether the shaft vibration sensor with the clamping piece meets the use requirement of bearing vibration monitoring of a thermal power plant can be determined, and the accuracy and the reliability of a steam turbine monitoring system are ensured;
the adjustment of the shaft vibration sensor with the clamping piece can be provided, and the accuracy of the measured parameters is ensured.
The device can accurately measure the alarm value and the protection action value of the shaft vibration sensor with the clamping piece, measures the vibration condition of the bearing when the unit is started, stopped and operated, can make correct alarm indication and protection action, and guarantees the safety of unit equipment and personnel.
Claims (8)
1. A detection system with a clamping piece for a shaft vibration sensor is characterized by comprising a standard vibration sensor (1), a vibration controller (2), a power amplifier (3), a vibration table (4), a shaft vibration sensor (5), a preamplifier (6), a clamping piece (7), a rack (8), a comparison method computer software system (9), a clamping piece computer software system (10), a direct current voltage stabilizing source (11), a digital multimeter (12), a shaft vibration metal disc (13) and a bracket (14);
the standard vibration sensor (1) is located on a vibration table (4), a support (14) is fixed on the vibration table (4), a shaft vibration sensor (5) is located on the support (14), a shaft vibration metal disc (13) is located on the standard vibration sensor (1), the shaft vibration sensor (5) is connected with a clamping piece computer software system (10) through a preamplifier (6), a rack (8) and a clamping piece (7), the clamping piece (7) is located at a measured point of the rack (8), the preamplifier (6) is connected with a direct current voltage stabilization source (11) and a digital multimeter (12), the vibration table (4) is connected with a vibration controller (2) through a power amplifier (3), the vibration controller (2) is connected with the standard vibration sensor (1), and the vibration controller (2) is connected with a comparison method computer software system (9).
2. The axial vibration sensor with card detection system according to claim 1, wherein the standard vibration sensor (1) is connected with the vibration controller (2) through a cable.
3. The axial vibration sensor with card detection system according to claim 1, wherein the vibration controller (2) is a dynamic signal analyzer.
4. The shaft vibration sensor with card detection system according to claim 1, characterized in that the shaft vibration metal disk (13) is rigidly mounted above the standard vibration sensor (1), and the shaft vibration sensor (5) is fixed on the bracket (14) which can adjust the initial gap in a non-contact manner.
5. The axial vibration sensor with card detection system according to claim 1, wherein the axial vibration sensor (5) is connected with the preamplifier (6) through a cable.
6. The shaft vibration sensor with card detection system according to claim 1, wherein the output cable of the standard vibration sensor (1) is fixed in a S-wound manner.
7. The axial vibration sensor with card detection system according to claim 1, wherein the gap voltage between the axial vibration sensor (5) and the axial vibration metal disk (13) is measured as-10V or-12V by the digital multimeter (12).
8. The method for detecting the shaft vibration sensor clamping piece is characterized in that the system for detecting the shaft vibration sensor clamping piece based on claim 1 comprises the following steps:
1) a card member computer software system (10) acquires an output value of a card member (7), and a comparison method computer software system acquires a vibration signal of a standard vibration sensor (1);
2) calculating the relative error of each measured point of the clamping piece (7) according to the output value of the clamping piece (7) and the vibration signal of the standard vibration sensor (1);
3) and adjusting the clamping piece (7) according to the relative error of each measured point of the clamping piece (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210265852.8A CN114739505A (en) | 2022-03-17 | 2022-03-17 | Detection system and method for shaft vibration sensor with clamping piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210265852.8A CN114739505A (en) | 2022-03-17 | 2022-03-17 | Detection system and method for shaft vibration sensor with clamping piece |
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| CN114739505A true CN114739505A (en) | 2022-07-12 |
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| CN202210265852.8A Pending CN114739505A (en) | 2022-03-17 | 2022-03-17 | Detection system and method for shaft vibration sensor with clamping piece |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015069681A (en) * | 2013-09-30 | 2015-04-13 | 株式会社Ｊｖｃケンウッド | Clamp mechanism and disk unit having the same |
| CN205194004U (en) * | 2015-11-02 | 2016-04-27 | 安徽理工大学 | Vibration early warning clock |
| CN109404066A (en) * | 2018-12-05 | 2019-03-01 | 华能国际电力股份有限公司大连电厂 | A kind of novel steam generating set monitoring and protection TSI system and its innovation optimization method |
| CN113091884A (en) * | 2021-05-24 | 2021-07-09 | 西安热工研究院有限公司 | Detection method of eddy current type vibration displacement sensor for power plant |
| CN213928470U (en) * | 2020-11-12 | 2021-08-10 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Steam turbine monitoring and protecting system |
-
2022
- 2022-03-17 CN CN202210265852.8A patent/CN114739505A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015069681A (en) * | 2013-09-30 | 2015-04-13 | 株式会社Ｊｖｃケンウッド | Clamp mechanism and disk unit having the same |
| CN205194004U (en) * | 2015-11-02 | 2016-04-27 | 安徽理工大学 | Vibration early warning clock |
| CN109404066A (en) * | 2018-12-05 | 2019-03-01 | 华能国际电力股份有限公司大连电厂 | A kind of novel steam generating set monitoring and protection TSI system and its innovation optimization method |
| CN213928470U (en) * | 2020-11-12 | 2021-08-10 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Steam turbine monitoring and protecting system |
| CN113091884A (en) * | 2021-05-24 | 2021-07-09 | 西安热工研究院有限公司 | Detection method of eddy current type vibration displacement sensor for power plant |
Non-Patent Citations (2)
| Title |
|---|
| 焦微微: "提高大型火电机组TSI振动卡件抗干扰性能的方法", 黑龙江电力, 29 February 2020 (2020-02-29), pages 2 * |
| 黄春艳, 施可登: "仪控系统信号干扰和卡件安全问题浅析与防范", 工业控制计算机, no. 01, 25 January 2004 (2004-01-25) * |
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