CN114659710A - Initial zero position positioning method for dynamic balance of rotor - Google Patents
Initial zero position positioning method for dynamic balance of rotor Download PDFInfo
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- CN114659710A CN114659710A CN202011536303.7A CN202011536303A CN114659710A CN 114659710 A CN114659710 A CN 114659710A CN 202011536303 A CN202011536303 A CN 202011536303A CN 114659710 A CN114659710 A CN 114659710A
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- initial zero
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims abstract description 49
- 239000000523 sample Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
- G01M1/16—Determining unbalance by oscillating or rotating the body to be tested
- G01M1/22—Determining unbalance by oscillating or rotating the body to be tested and converting vibrations due to unbalance into electric variables
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- 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
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
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Abstract
The invention provides an initial zero position positioning method for dynamic balance of a rotor, which comprises the following steps: 1) the rotor to be measured is provided with a key phase measuring structure, a positioning displacement sensor is arranged, a sensor probe of the displacement sensor is aligned to the rotor to be measured, and a voltage detection element is connected with the displacement sensor; 2) and controlling the rotor to be tested to rotate, displaying the gap voltage between the sensor probe and the rotor to be tested in real time by the voltage detection element, controlling the rotor to be tested to stop when the gap voltage value changes, and enabling the position of the rotor to be tested, which is just opposite to the displacement sensor, to be the initial zero position of the dynamic balance of the rotor. The positioning method of the invention solves the problems of inaccurate positioning of the initial zero position of the dynamic balance of the rotor, time consumption and complexity by using the displacement sensor to position the initial zero position of the dynamic balance of the rotor.
Description
Technical Field
The invention relates to a method for processing a turbine field vibration fault, in particular to a method for positioning an initial zero position of rotor dynamic balance for processing a turbine unbalance fault.
Background
In the field vibration fault of the steam turbine, the unbalance fault accounts for 80%, and the best method for treating the vibration fault is field dynamic balance. In the analysis of vibration data, one of the most important parameters is the vibration phase value, which is closely related to the key phase measurement position, and the position of the field dynamic emphasis to be determined later when the field dynamic balance is performed is also closely related to the key phase measurement position.
Generally, equipment for measuring vibration phases can be located in a bearing seat or in a narrow space, when the measurement position needs to be determined before field dynamic balance, a complex work is needed to open a bearing cover, and then a key phase triggering structure on a rotating shaft is aligned with key phase measuring equipment; or drilled into a narrow space to see if the key phase trigger structure on the spindle is aligned with the key phase measurement device. The former method is time consuming and labor consuming, and wastes valuable time for repairing and processing problems, and the latter method cannot accurately judge whether the key phase trigger structure is aligned with the key phase measuring device.
Therefore, an initial zero position positioning method for rotor dynamic balance is needed to solve the problems that the existing initial zero position positioning for dynamic balance is inaccurate, time-consuming and tedious.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a method for positioning an initial zero position of a rotor in dynamic balance, which is used to solve the problems of inaccuracy, time consumption and complexity of the conventional method for obtaining a phase measurement position of a dynamic balance key.
To achieve the above and other related objects, the present invention provides a method for initial zero positioning of rotor dynamic balance. Which comprises the following steps:
1) the rotor to be measured is provided with a key phase measuring structure, a positioning displacement sensor is arranged, a probe of the displacement sensor is aligned to the rotor to be measured, and a voltage detection element is connected with the displacement sensor;
2) and controlling the rotor to be tested to rotate, displaying the gap voltage between the sensor probe and the rotor to be tested in real time by the voltage detection element, controlling the rotor to be tested to stop when the gap voltage value changes, and setting the position of the rotor to be tested, which is just opposite to the displacement sensor, as an initial zero position of dynamic balance of the rotor.
As described above, the initial zero position positioning method for rotor dynamic balance of the present invention has the following beneficial effects: the positioning method uses the change of the gap voltage to position the initial zero position of the dynamic balance of the rotor, and is more accurate compared with the traditional method of drilling to a narrow space to observe; in addition, the positioning method can position the initial zero position of the dynamic balance of the rotor only by positioning and installing the displacement sensor probe without opening the bearing cover, so that the positioning can be carried out more quickly and conveniently, and the time for rush repair of faults is saved.
Preferably, the method further comprises a step 3) of marking the corresponding position of the observable part of the rotor to be measured and the initial zero position of the dynamic balance of the rotor correspondingly so as to ensure that the subsequent field dynamic balance can be operated by directly referring to the marked position.
Preferably, the displacement sensor is fixed by the magnetic base in an adsorption manner, so that the sensor is convenient to mount and dismount.
Preferably, the key phase measuring structure is a groove or a protrusion, so that the groove or the protrusion of the key phase measuring structure can be detected by the displacement sensor and the initial zero position can be further positioned.
Preferably, in the step 2), the rotating speed of the rotor to be measured is controlled to be less than 3r/min, and the rotating speed of the rotor to be measured less than 3r/min can ensure that when the initial zero position of the dynamic balance of the rotor is aligned with the displacement sensor, the gap voltage changes and stops the rotation of the rotor to record the position of the initial zero position of the dynamic balance of the rotor, so that the obtained result is more accurate.
Preferably, the distance between the displacement sensor and the rotor is required to satisfy the following conditions: the gap voltage between the displacement sensor and the rotor to be measured is-10V, and the displacement sensor is most sensitive to the feedback of the gap voltage.
Preferably, the displacement sensor is an eddy current sensor, and compared with a traditional displacement sensor, the eddy current sensor is more sensitive and accurate.
Drawings
Fig. 1 is a key phase measurement schematic diagram illustrating an initial zero position method for rotor dynamic balance according to the present invention.
Fig. 2 is a schematic voltage measurement diagram illustrating an initial zero position locating method for rotor dynamic balance according to the present invention.
FIG. 3 is a schematic diagram of a port panel of a front-end device for an initial zero positioning method of dynamic balance of a rotor according to the present invention.
FIG. 4 is a flow chart illustrating the steps of an initial zero positioning method for dynamic balancing of a rotor according to the present invention.
Description of the element reference numerals
1 rotor to be tested
11 initial zero position
2 displacement sensor
21 sensor probe
22 extension cable
23 preposition device
3 universal meter
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 to 4, the present invention mainly provides a method for positioning an initial zero position of a dynamic balance of a rotor, which includes the following steps:
1) a key phase measuring structure is arranged on the rotor 1 to be measured, the displacement sensor 2 is installed and positioned, a displacement sensor probe 21 of the displacement sensor 2 is aligned to the rotor 1 to be measured, and a voltage detection element is connected with the displacement sensor 2;
2) and controlling the rotor 1 to be tested to rotate, displaying the gap voltage between the sensor probe 21 and the rotor 1 to be tested in real time by the voltage detection element, controlling the rotor 1 to be tested to stop when the gap voltage value changes, and enabling the position of the rotor 1 to be tested just opposite to the displacement sensor 2 to be an initial zero position of rotor dynamic balance.
In the embodiment, the initial zero position of the dynamic balance of the rotor is positioned by using the gap voltage change, so that the method is more accurate compared with the traditional method of drilling to a narrow space for observation; in addition, the positioning method does not need to open a bearing cover, and the initial zero position of the dynamic balance of the rotor can be positioned only by positioning and installing the displacement sensor probe 21, so that the positioning can be carried out more quickly and conveniently, and the time for rush repair of faults is saved.
In this embodiment, as shown in fig. 4, a step 3) is further included, and a corresponding mark is made at a position corresponding to an initial zero position of the dynamic balance of the rotor at the observable position of the rotor 1 to be measured. The markers are used for ensuring that the subsequent field dynamic balance can be directly operated by referring to the positions of the markers.
In the embodiment, in order to facilitate the installation and the disassembly of the displacement sensor 2, the displacement sensor 2 is fixed by the magnetic base in an adsorption way; as another embodiment, in order to stabilize the fixing of the displacement sensor 2, the displacement sensor 2 may be fixed by a fixing bracket.
Further, a key phase measuring structure is processed into a groove shape on the rotor 1 to be measured, so that when the rotor 1 to be measured drives the key phase measuring structure to move to face the displacement sensor 2, the displacement sensor 2 can detect the change of gap voltage, and the initial zero position of the dynamic balance of the rotor is determined; in another embodiment, the key phase measuring structure may be formed in a convex shape, and the displacement sensor 2 may be used to further determine the initial zero position of the rotor dynamic balance.
In this embodiment, when step 2) is executed, the rotation speed of the rotor 1 to be measured is controlled to be 2r/min, and when the rotation speed of the rotor 1 to be measured is 2r/min, it can be ensured that when the initial zero position 11 of the dynamic balance of the rotor 1 to be measured is aligned with the displacement sensor 2, the gap voltage will change, and when the rotation is stopped, the recording of the position of the initial zero position of the dynamic balance of the rotor is more accurate.
In the present embodiment, the displacement sensor 2 comprises a sensor probe 21 and a front-end device 23, the sensor probe 21 is connected with the front-end device 23 through an extension cable 22 as shown in fig. 2, and a direct-current voltage signal of-17.5V to-26.0V is connected into the front-end device 23.
Further, in order to ensure that the feedback of the displacement sensor 2 to the gap voltage is more timely and fast, the distance between the displacement sensor 2 and the rotor 1 is controlled to be-10V at the gap voltage between the displacement sensor 2 and the rotor 1.
Furthermore, as shown in fig. 2, the voltage detection element is a multimeter 3, the multimeter 3 is set to have a dc voltage measurement range, the black pen is connected to the "COM" port of the front end 23 of the displacement sensor 2, and the red pen is connected to the "OUT" port of the front end 23, wherein the panel port position of the front end 23 is shown in fig. 3.
The displacement sensor 2 used in this embodiment is an eddy current sensor, and compared with the conventional displacement sensor 2, the eddy current sensor is more sensitive and accurate to feedback of the gap voltage, and the displacement sensor 2 is not limited to the eddy current sensor, and any sensor capable of detecting the change of the gap voltage can be adopted.
Still further, in the field of steam turbine technology, a steam turbine is generally equipped with a key phase device for measuring a vibration phase angle of the rotor 1, and the key phase device as an eddy current sensor can also detect a change in gap voltage.
In summary, according to the initial zero position positioning method for rotor dynamic balance, the initial zero position of rotor dynamic balance is positioned by using the displacement sensor 2, so that the problems that the existing initial zero position 11 for dynamic balance is inaccurate in positioning and time-consuming and tedious are solved. Therefore, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The initial zero positioning method for the dynamic balance of the rotor is characterized by comprising the following steps of:
1) the rotor to be measured is provided with a key phase measuring structure, a positioning displacement sensor is arranged, a sensor probe of the displacement sensor is aligned to the rotor to be measured, and a voltage detection element is connected with the displacement sensor;
2) and controlling the rotor to be tested to rotate, displaying the gap voltage between the sensor probe and the rotor to be tested in real time by the voltage detection element, controlling the rotor to be tested to stop when the gap voltage value changes, and enabling the position of the rotor to be tested, which is just opposite to the displacement sensor, to be the initial zero position of the dynamic balance of the rotor.
2. The method for initial zero positioning of rotor dynamic balance as claimed in claim 1, wherein: and 3) correspondingly marking the position, corresponding to the initial zero position of the dynamic balance of the rotor, of the observable part of the rotor to be tested.
3. The method of claim 1, wherein the method comprises: the displacement sensor is fixed by the magnetic base in an adsorption way.
4. The method for initial zero positioning of rotor dynamic balance as claimed in claim 1, wherein: the key phase measuring structure is a groove or a bulge.
5. The method for initial zero positioning of rotor dynamic balance as claimed in claim 1, wherein: in the step 2), the rotation speed of the rotor to be measured is controlled to be 2 r/min-3 r/min.
6. The method for initial zero positioning of rotor dynamic balance as claimed in claim 1, wherein: the distance between the displacement sensor and the rotor to be measured needs to satisfy: the gap voltage between the sensor probe and the rotor is-10V.
7. The method for initial zero positioning of rotor dynamic balance as claimed in claim 1, wherein: the displacement sensor is an eddy current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536303.7A CN114659710A (en) | 2020-12-23 | 2020-12-23 | Initial zero position positioning method for dynamic balance of rotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536303.7A CN114659710A (en) | 2020-12-23 | 2020-12-23 | Initial zero position positioning method for dynamic balance of rotor |
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| CN114659710A true CN114659710A (en) | 2022-06-24 |
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| CN202011536303.7A Pending CN114659710A (en) | 2020-12-23 | 2020-12-23 | Initial zero position positioning method for dynamic balance of rotor |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556200A (en) * | 2008-06-24 | 2009-10-14 | 郑州大学 | Vector spectrum based dynamic balance method for flexible rotor |
| CN104501714A (en) * | 2014-12-29 | 2015-04-08 | 贵州电力试验研究院 | Online monitoring device and online monitoring method for eccentric azimuth angle of steam turbine rotor |
| US20150338240A1 (en) * | 2014-05-22 | 2015-11-26 | General Electric Company | System and method for mechanical runout measurement |
| CN106382882A (en) * | 2016-10-17 | 2017-02-08 | 南京航空航天大学 | Test system and test method of rotating machinery rotor-stator rim field |
| CN109596356A (en) * | 2018-12-12 | 2019-04-09 | 北京振测智控科技有限公司 | A kind of measurement method of steam-electric generating set shafting bias |
| US20190271609A1 (en) * | 2018-03-02 | 2019-09-05 | Schenck Rotec Gmbh | Method for calibrating a balancing machine |
| CN212109904U (en) * | 2020-04-23 | 2020-12-08 | 贵州创星电力科学研究院有限责任公司 | Turbine generator set rotor eccentricity and phase measuring device thereof |
-
2020
- 2020-12-23 CN CN202011536303.7A patent/CN114659710A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556200A (en) * | 2008-06-24 | 2009-10-14 | 郑州大学 | Vector spectrum based dynamic balance method for flexible rotor |
| US20150338240A1 (en) * | 2014-05-22 | 2015-11-26 | General Electric Company | System and method for mechanical runout measurement |
| CN104501714A (en) * | 2014-12-29 | 2015-04-08 | 贵州电力试验研究院 | Online monitoring device and online monitoring method for eccentric azimuth angle of steam turbine rotor |
| CN106382882A (en) * | 2016-10-17 | 2017-02-08 | 南京航空航天大学 | Test system and test method of rotating machinery rotor-stator rim field |
| US20190271609A1 (en) * | 2018-03-02 | 2019-09-05 | Schenck Rotec Gmbh | Method for calibrating a balancing machine |
| CN110220644A (en) * | 2018-03-02 | 2019-09-10 | 申克罗泰克有限责任公司 | Method for calibrating balancing machine |
| CN109596356A (en) * | 2018-12-12 | 2019-04-09 | 北京振测智控科技有限公司 | A kind of measurement method of steam-electric generating set shafting bias |
| CN212109904U (en) * | 2020-04-23 | 2020-12-08 | 贵州创星电力科学研究院有限责任公司 | Turbine generator set rotor eccentricity and phase measuring device thereof |
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