CN109307471B - Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station - Google Patents
Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station Download PDFInfo
- Publication number
- CN109307471B CN109307471B CN201811345081.3A CN201811345081A CN109307471B CN 109307471 B CN109307471 B CN 109307471B CN 201811345081 A CN201811345081 A CN 201811345081A CN 109307471 B CN109307471 B CN 109307471B
- Authority
- CN
- China
- Prior art keywords
- shaft
- pump shaft
- displacement
- sensor
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a zero calibration method for a displacement sensor of a main water feeding pump shaft of a nuclear power station, which comprises the following steps of: firstly, equally dividing the rotation circumference of a pump shaft into n equal parts; secondly, pushing the pump shaft to the driving motor side of the pump is defined as the positive direction of shaft displacement, and the pump shaft deviating from the driving motor side is defined as the negative direction of shaft displacement; thirdly, recording the displacement value of the sensor shaft after the pump shaft is kept pushed and loosened; fourthly, rotating a pump shaft according to the rotation direction of normal operation of the pump; fifthly, finding out the maximum sensor shaft displacement value Smax of each equant point after the pump shaft is loosened; sixthly, finding out the maximum difference value Hmax; seventhly, recording the displacement value of the sensor shaft after the release, and marking as a; eighthly, calculating a compensation value C of zero calibration; and step nine, positioning the shaft displacement sensor according to the compensation value C obtained in the step eight. The method eliminates the adverse effect of the tile elastic quantity on the zero point calibration accuracy, and improves the calibration accuracy.
Description
Technical Field
The invention belongs to the technical field of analysis and measurement control, and particularly relates to a zero calibration method for a displacement sensor of a main water feeding pump shaft of a nuclear power station
Background
The main feed water pump is a key power device of a secondary loop of the nuclear power station, and supplies feed water to the secondary side of the steam generator, so that the effect of sufficient heat exchange is guaranteed. In the existing million kilowatt pressurized water reactor nuclear power station, 1 eddy current type shaft displacement sensor is generally designed in a bearing chamber at the non-driving end of a main feed water pump, and the main function of the sensor is to monitor the displacement change of a pump shaft so as to reflect the relative position of a thrust disc and a thrust bearing, avoid the abnormal abrasion of a thrust pad and ensure the operation safety of equipment. After the main feed water pump is disassembled for maintenance and other work, the shaft displacement sensor needs to be calibrated again at zero point, so that the shaft displacement of the main feed water pump in the operation process can be accurately displayed.
Due to the fact that the accuracy of a traditional zero calibration method of the shaft displacement sensor is insufficient, multiple times of shaft displacement high-alarm faults are generated in the application process of a certain million-kilowatt-level pressurized water reactor nuclear power station, the availability ratio of a main water feed pump is reduced, and safe and reliable operation of a system and a unit is affected.
Therefore, a more reliable method for calibrating the zero point of the main feed pump shaft displacement sensor is developed, and is very important for safe and reliable operation of equipment and units.
Disclosure of Invention
The invention aims to: the zero calibration method of the displacement sensor of the main feed pump shaft of the nuclear power station aims to solve the problems that the existing zero calibration method is low in accuracy, high in displacement of the main feed pump shaft is alarmed, and the low availability ratio of the main feed pump and the low operation stability of a unit are caused by the high displacement of the main feed pump shaft.
The technical scheme of the invention is as follows: a zero calibration method for a displacement sensor of a main water feeding pump shaft of a nuclear power station comprises the following steps:
firstly, dividing the rotating circumference of a pump shaft into n equal parts along the rotating direction of the pump shaft, and marking serial numbers;
secondly, pushing the pump shaft to the driving motor side of the pump to be defined as the positive direction of shaft displacement, defining the pump shaft to deviate from the driving motor side as the negative direction of shaft displacement, and recording the difference of shaft displacement values of the pump shaft at the top ends of the two sides;
thirdly, positioning the pump shaft at any marked bisector in the first step, pushing the pump shaft to the side of a pump driving motor until the displacement value of the sensor shaft is not increased any more, then loosening the pump shaft, and respectively recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened;
fourthly, rotating the pump shaft according to the rotation direction of normal operation of the pump, and sequentially recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened at the rest of the equant points;
fifthly, finding out the maximum sensor shaft displacement value Smax of each equant point after the pump shaft is loosened and the serial number of the equant point;
sixthly, respectively calculating the difference value of the subtraction of the displacement values of the sensor shaft after the pump shaft is pushed up and loosened at each dividing point, and finding out the maximum difference value Hmax;
seventhly, rotating the pump shaft to an equal division point of the maximum sensor shaft displacement value Smax, pushing the pump shaft to the side of the driving motor and then loosening, and recording the loosened sensor shaft displacement value which is marked as a;
and eighthly, calculating a compensation value C of zero calibration as follows:
and ninthly, moving the shaft displacement sensor to the side of the driving motor by a distance C according to the compensation value C obtained in the eighth step, and then positioning the shaft displacement sensor, namely completing the zero calibration of the shaft displacement sensor.
Preferably, in the first step, n is 4 to 12.
Preferably, in the second step, the difference between the axial displacement values of the two side tips is the thrust gap of the rotor.
Preferably, a crowbar is used to push the pump shaft towards the pump drive motor side.
Preferably, in the sixth step, the difference obtained by subtracting the displacement value is an absolute value, and the rest values are algebraic values.
Preferably, in the fifth step, if the sensor displacement values are negative after all the equally divided points are released, the first to fourth steps should be performed again.
The invention has the following remarkable effects: 1) the adverse effect of the tile elastic quantity on the zero point calibration accuracy is eliminated, and the calibration accuracy is improved; 2) the adverse effect of circumferential motion inconsistency of the tile groups on zero point calibration is eliminated, and the accuracy level of calibration is improved; 3) according to the method, zero calibration is implemented on the APA main feed pump shaft displacement sensor of the unit 1-4 of a certain million kilowatt pressurized water reactor power station, so that the problem of high shaft displacement alarm fault caused by low zero calibration accuracy is thoroughly solved, and a good effect is achieved; 4) the method does not jack the rotor by a jack or other strong forces, thereby not only avoiding the deformation of the thrust pad surface caused by excessive extrusion and even the damage of components caused by the 'suction' of the thrust disc and other reasons, but also improving the working efficiency.
Detailed Description
The zero calibration method for the displacement sensor of the main feed water pump shaft of the nuclear power station is further described in detail with reference to specific embodiments.
A zero calibration method for a displacement sensor of a main water feeding pump shaft of a nuclear power station comprises the following steps:
firstly, dividing the rotating circumference of a pump shaft into n equal parts along the rotating direction of the pump shaft, and marking serial numbers;
secondly, pushing the pump shaft to the driving motor side of the pump to be defined as the positive direction of shaft displacement, defining the pump shaft to deviate from the driving motor side as the negative direction of shaft displacement, and recording the difference of shaft displacement values of the pump shaft at the top ends of the two sides;
thirdly, positioning the pump shaft at any marked bisector in the first step, pushing the pump shaft to the side of a pump driving motor until the displacement value of the sensor shaft is not increased any more, then loosening the pump shaft, and respectively recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened;
fourthly, rotating the pump shaft according to the rotation direction of normal operation of the pump, and sequentially recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened at the rest of the equant points;
fifthly, finding out the maximum sensor shaft displacement value Smax of each equant point after the pump shaft is loosened and the serial number of the equant point;
sixthly, respectively calculating the difference value of the subtraction of the displacement values of the sensor shaft after the pump shaft is pushed up and loosened at each dividing point, and finding out the maximum difference value Hmax;
seventhly, rotating the pump shaft to an equal division point of the maximum sensor shaft displacement value Smax, pushing the pump shaft to the side of the driving motor and then loosening, and recording the loosened sensor shaft displacement value which is marked as a;
and eighthly, calculating a compensation value C of zero calibration as follows:
and ninthly, moving the shaft displacement sensor to the side of the driving motor by a distance C according to the compensation value C obtained in the eighth step, and then positioning the shaft displacement sensor, namely completing the zero calibration of the shaft displacement sensor.
Preferably, in the first step, n is 4 to 12.
Preferably, in the second step, the difference between the axial displacement values of the two side tips is the thrust gap of the rotor.
Preferably, a crowbar is used to push the pump shaft towards the pump drive motor side.
Preferably, in the sixth step, the difference obtained by subtracting the displacement value is an absolute value, and the rest values are algebraic values.
Preferably, in the fifth step, if the sensor displacement values are negative after all the equally divided points are released, the first to fourth steps should be performed again.
Claims (6)
1. A zero calibration method for a displacement sensor of a main water feeding pump shaft of a nuclear power station is characterized by comprising the following steps:
firstly, dividing the rotating circumference of a pump shaft into n equal parts along the rotating direction of the pump shaft, and marking serial numbers;
secondly, pushing the pump shaft to the driving motor side of the pump to be defined as the positive direction of shaft displacement, defining the pump shaft to deviate from the driving motor side as the negative direction of shaft displacement, and recording the difference of shaft displacement values of the pump shaft at the top ends of the two sides;
thirdly, positioning the pump shaft at any marked bisector in the first step, pushing the pump shaft to the side of a pump driving motor until the displacement value of the sensor shaft is not increased any more, then loosening the pump shaft, and respectively recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened;
fourthly, rotating the pump shaft according to the rotation direction of normal operation of the pump, and sequentially recording the displacement values of the sensor shaft after the pump shaft is kept pushed up and loosened at the rest of the equant points;
fifthly, finding out the maximum sensor shaft displacement value Smax of each equant point after the pump shaft is loosened and the serial number of the equant point;
sixthly, respectively calculating the difference value of the subtraction of the displacement values of the sensor shaft after the pump shaft is pushed up and loosened at each dividing point, and finding out the maximum difference value Hmax;
seventhly, rotating the pump shaft to an equal division point of the maximum sensor shaft displacement value Smax, pushing the pump shaft to the side of the driving motor and then loosening, and recording the loosened sensor shaft displacement value which is marked as a;
and eighthly, calculating a compensation value C of zero calibration as follows:
and ninthly, moving the shaft displacement sensor to the side of the driving motor by a distance C according to the compensation value C obtained in the eighth step, and then positioning the shaft displacement sensor, namely completing the zero calibration of the shaft displacement sensor.
2. The zero calibration method for the displacement sensor of the main water feed pump shaft of the nuclear power station as claimed in claim 1, characterized in that: in the first step, n is 4-12.
3. The zero calibration method for the displacement sensor of the main water feed pump shaft of the nuclear power station as claimed in claim 1, characterized in that: in the second step, the difference of the axial displacement values of the top ends at the two sides is the thrust clearance of the rotor.
4. The zero calibration method for the displacement sensor of the main water feed pump shaft of the nuclear power station as claimed in claim 1, characterized in that: a crowbar is used to push the pump shaft towards the pump drive motor side.
5. The zero calibration method for the displacement sensor of the main water feed pump shaft of the nuclear power station as claimed in claim 1, characterized in that: in the sixth step, the difference value of the subtraction of the displacement values is an absolute value, and the rest values are algebraic values.
6. The zero calibration method for the displacement sensor of the main water feed pump shaft of the nuclear power station as claimed in claim 1, characterized in that: in the fifth step, if the displacement values of the sensors are negative after all the equant points are loosened, the first step to the fourth step should be performed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345081.3A CN109307471B (en) | 2018-11-13 | 2018-11-13 | Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345081.3A CN109307471B (en) | 2018-11-13 | 2018-11-13 | Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109307471A CN109307471A (en) | 2019-02-05 |
| CN109307471B true CN109307471B (en) | 2020-08-21 |
Family
ID=65221892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811345081.3A Active CN109307471B (en) | 2018-11-13 | 2018-11-13 | Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109307471B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284738B (en) * | 2020-09-10 | 2022-05-20 | 福建福清核电有限公司 | Axial displacement measurement and zero point calibration method for nuclear power steam turbine unit |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03137530A (en) * | 1989-10-24 | 1991-06-12 | Nippon Seiko Kk | Displacement sensor and torque sensor |
| JP2010181195A (en) * | 2009-02-03 | 2010-08-19 | Nagase Integrex Co Ltd | Shape measuring device |
| CN102039316A (en) * | 2009-10-10 | 2011-05-04 | 北京理工大学 | Zero-point calibration method for hot continuous rolling machine frame |
| CN202501835U (en) * | 2012-03-16 | 2012-10-24 | 成都飞机设计研究所 | Vertical type linear displacement sensor scaling/calibrating device |
| CN202607493U (en) * | 2012-06-26 | 2012-12-19 | 徐维钧 | Inner zero-setting measuring device |
| CN103196410A (en) * | 2013-04-03 | 2013-07-10 | 广东富华工程机械制造有限公司 | Automobile hub bearing axial clearance measuring instrument and using method of same |
| CN103506955A (en) * | 2013-09-12 | 2014-01-15 | 上海交通大学 | Inner spherical surface ring precise grinding on-line detecting device and automatic inner spherical surface ring precise grinding on-line detecting method |
| CN103868491A (en) * | 2014-03-17 | 2014-06-18 | 中联重科股份有限公司 | Zero calibration device and zero calibration method for electrohydraulic control steering axle |
| CN104019929A (en) * | 2014-06-11 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Online rotating shaft torque measurement method based on relative displacement measurement of eddy current |
| CN104048588A (en) * | 2014-06-25 | 2014-09-17 | 中国科学院长春光学精密机械与物理研究所 | Calibration device for plate condenser displacement sensor |
| CN104075652A (en) * | 2014-07-02 | 2014-10-01 | 中国科学院长春光学精密机械与物理研究所 | Calibration device for capacitance displacement sensor |
| CN204255319U (en) * | 2014-11-14 | 2015-04-08 | 中国航空工业第六一八研究所 | A kind of stepless-adjustment zero structure of linear movement pick-up |
| CN204255320U (en) * | 2014-11-14 | 2015-04-08 | 中国航空工业第六一八研究所 | A kind of zeroing locking mechanism of telescopic linear movement pick-up |
| CN104624999A (en) * | 2014-11-27 | 2015-05-20 | 中冶连铸技术工程有限责任公司 | Roll gap calibration device and method for square billet tension leveler |
| CN104677929A (en) * | 2015-03-20 | 2015-06-03 | 中国工程物理研究院总体工程研究所 | Method for measuring volume expansion coefficient of shell |
| CN105606052A (en) * | 2016-01-20 | 2016-05-25 | 天津大学 | Micro displacement sensor calibration apparatus based on high-precision rectilinear translation bench |
| CN105783820A (en) * | 2016-03-18 | 2016-07-20 | 中国直升机设计研究所 | Helicopter level displacement sensor zero adjustment device and zero adjustment method |
| CN205426121U (en) * | 2016-03-03 | 2016-08-03 | 重庆长安汽车股份有限公司 | Bent axle axle clearance detects demarcation frock of machine |
| CN207540500U (en) * | 2017-12-08 | 2018-06-26 | 深圳伊讯科技有限公司 | A kind of displacement sensor |
| CN108694298A (en) * | 2018-07-04 | 2018-10-23 | 温州大学 | A kind of axial plunger pump bearing inner race and outer ring method for diagnosing faults |
-
2018
- 2018-11-13 CN CN201811345081.3A patent/CN109307471B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03137530A (en) * | 1989-10-24 | 1991-06-12 | Nippon Seiko Kk | Displacement sensor and torque sensor |
| JP2010181195A (en) * | 2009-02-03 | 2010-08-19 | Nagase Integrex Co Ltd | Shape measuring device |
| CN102039316A (en) * | 2009-10-10 | 2011-05-04 | 北京理工大学 | Zero-point calibration method for hot continuous rolling machine frame |
| CN202501835U (en) * | 2012-03-16 | 2012-10-24 | 成都飞机设计研究所 | Vertical type linear displacement sensor scaling/calibrating device |
| CN202607493U (en) * | 2012-06-26 | 2012-12-19 | 徐维钧 | Inner zero-setting measuring device |
| CN103196410A (en) * | 2013-04-03 | 2013-07-10 | 广东富华工程机械制造有限公司 | Automobile hub bearing axial clearance measuring instrument and using method of same |
| CN103506955A (en) * | 2013-09-12 | 2014-01-15 | 上海交通大学 | Inner spherical surface ring precise grinding on-line detecting device and automatic inner spherical surface ring precise grinding on-line detecting method |
| CN103868491A (en) * | 2014-03-17 | 2014-06-18 | 中联重科股份有限公司 | Zero calibration device and zero calibration method for electrohydraulic control steering axle |
| CN104019929A (en) * | 2014-06-11 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Online rotating shaft torque measurement method based on relative displacement measurement of eddy current |
| CN104048588A (en) * | 2014-06-25 | 2014-09-17 | 中国科学院长春光学精密机械与物理研究所 | Calibration device for plate condenser displacement sensor |
| CN104075652A (en) * | 2014-07-02 | 2014-10-01 | 中国科学院长春光学精密机械与物理研究所 | Calibration device for capacitance displacement sensor |
| CN204255319U (en) * | 2014-11-14 | 2015-04-08 | 中国航空工业第六一八研究所 | A kind of stepless-adjustment zero structure of linear movement pick-up |
| CN204255320U (en) * | 2014-11-14 | 2015-04-08 | 中国航空工业第六一八研究所 | A kind of zeroing locking mechanism of telescopic linear movement pick-up |
| CN104624999A (en) * | 2014-11-27 | 2015-05-20 | 中冶连铸技术工程有限责任公司 | Roll gap calibration device and method for square billet tension leveler |
| CN104677929A (en) * | 2015-03-20 | 2015-06-03 | 中国工程物理研究院总体工程研究所 | Method for measuring volume expansion coefficient of shell |
| CN105606052A (en) * | 2016-01-20 | 2016-05-25 | 天津大学 | Micro displacement sensor calibration apparatus based on high-precision rectilinear translation bench |
| CN205426121U (en) * | 2016-03-03 | 2016-08-03 | 重庆长安汽车股份有限公司 | Bent axle axle clearance detects demarcation frock of machine |
| CN105783820A (en) * | 2016-03-18 | 2016-07-20 | 中国直升机设计研究所 | Helicopter level displacement sensor zero adjustment device and zero adjustment method |
| CN207540500U (en) * | 2017-12-08 | 2018-06-26 | 深圳伊讯科技有限公司 | A kind of displacement sensor |
| CN108694298A (en) * | 2018-07-04 | 2018-10-23 | 温州大学 | A kind of axial plunger pump bearing inner race and outer ring method for diagnosing faults |
Non-Patent Citations (1)
| Title |
|---|
| 基桩抗压静载荷试验数据的质量控制方法研究;罗伟新 等;《工程质量》;20030228;第21卷(第2期);25-27 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109307471A (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109307471B (en) | Zero calibration method for displacement sensor of main water supply pump shaft of nuclear power station | |
| CN101813448B (en) | Special calculator used in the method for aligning and centering coupler of rotating machinery | |
| CN101635488B (en) | Method for aligning concentricity of exciter rotor and generator rotor of turbogenerator | |
| CN204912282U (en) | Rolling mill memorial archway clearance adjustment compensation arrangement | |
| CN106092026A (en) | A kind of axial clearance detector of wheel hub | |
| CN104132766A (en) | High-precision torque detection device | |
| CN103557774A (en) | Nuclear main pump impeller wing section detection method | |
| CN101707417B (en) | Concentricity aligning method of a plurality of series motors | |
| CN206780073U (en) | A kind of cathode roll milling apparatus | |
| CN205991798U (en) | A kind of wheel hub axial direction clearance detector | |
| CN113237577B (en) | Real-time detection device for axial load of bearing and shield machine | |
| JP2972323B2 (en) | Steam turbine | |
| CN105114757A (en) | Screw type geometry detecting robot device | |
| CN111059976A (en) | Measurement error correction method for nuclear power plant steam turbine differential expansion sensor | |
| CN201788504U (en) | Calculator special for aligning and centering rotating mechanical coupling | |
| CN114379738A (en) | Key-free hydraulic connection installation method for propeller | |
| CN210790759U (en) | Standard measurable push shaft device for main water feed pump of nuclear power station | |
| CN114353653A (en) | Method for measuring axial displacement of high-temperature gas cooled reactor nuclear turbine | |
| CN112284738B (en) | Axial displacement measurement and zero point calibration method for nuclear power steam turbine unit | |
| CN209639663U (en) | A kind of roller gap measurement bracket | |
| CN204043834U (en) | A kind of high precision torque detecting apparatus | |
| CN206254092U (en) | A kind of wind-driven generator centering tooling | |
| CN107869959B (en) | laser measurement method for expansion amount of low-pressure rotor of nuclear turbine | |
| CN103862263B (en) | The accurate press-loading apparatus of normal temperature and the pressing method thereof of a kind of rotor and bent axle | |
| CN104006969B (en) | Online automatic-detection sliding bearing fault early-warning system and expansion amount measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |