CN219956718U - High-speed rotating shaft surface temperature on-line monitoring device - Google Patents
High-speed rotating shaft surface temperature on-line monitoring device Download PDFInfo
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- CN219956718U CN219956718U CN202320982270.1U CN202320982270U CN219956718U CN 219956718 U CN219956718 U CN 219956718U CN 202320982270 U CN202320982270 U CN 202320982270U CN 219956718 U CN219956718 U CN 219956718U
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- infrared sensor
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- surface temperature
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- monitoring device
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 238000005452 bending Methods 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model belongs to the field of shaft surface temperature monitoring devices, and discloses a high-speed rotating shaft surface temperature online monitoring device.
Description
Technical Field
The utility model belongs to the field of shaft surface temperature monitoring devices, and particularly relates to a high-speed rotating shaft surface temperature online monitoring device.
Background
The Morton effect, the uneven heating of the coil and the uneven cooling caused by the blockage of the air duct, and the uneven friction between the rotor and the brush holder, the oil baffle, the sealing tile and the like can cause transient thermal bending of rotating parts such as the rotor of the turbo generator, and the like, thereby causing shafting vibration faults and adversely affecting the safe operation of the unit. Only vibration data is utilized, so that the source of vibration faults is difficult to accurately diagnose, and effective measures cannot be taken for faults. In addition, the early ignition abnormality of the carbon brush slip ring can be early warned through temperature monitoring, the degradation trend is monitored, early warning information is pushed in real time, and the excitation carbon brush malignant accident is prevented. With respect to the high-speed rotation shaft, if the degree of temperature unevenness of the surface thereof can be measured, the degree of bending can be estimated, providing a strong support for the process of vibration failure diagnosis and the like.
Disclosure of Invention
The utility model aims to overcome the defects, and provides the high-speed rotating shaft surface temperature on-line monitoring device which can realize real-time monitoring of the high-speed rotating shaft surface temperature, identify the temperature deviations of different positions of the rotor surface in the circumferential direction and provide a basis for rotor thermal bending and vibration analysis diagnosis.
In order to achieve the purpose, the intelligent electric motor comprises an infrared sensor and an eddy current key phase sensor, wherein the infrared sensor and the eddy current key phase sensor point to the rotor, the infrared sensor is used for collecting the surface temperature of the rotor, the eddy current key phase sensor is used for collecting the rotating speed of the rotor, and the infrared sensor and the eddy current key phase sensor are connected with an upper computer.
The infrared sensor adopts a high-frequency response infrared sensor.
The infrared sensor and the eddy current key phase sensor are directed to the exposed portion of the side journal of the bearing.
The acquisition frequency of the infrared sensor is at least 10 times the rotation frequency of the rotor.
The circumference of the rotor is provided with at least 10 temperature measuring points.
The infrared sensor sends a current or voltage signal to the upper computer, and the eddy current key phase sensor sends a voltage signal to the upper computer.
Compared with the prior art, the intelligent rotor temperature sensor is provided with the infrared sensor and the eddy current key phase sensor, the infrared sensor and the eddy current key phase sensor are simultaneously directed to the rotor, the infrared sensor is used for collecting the surface temperature of the rotor, the eddy current key phase sensor is used for collecting the rotating speed of the rotor, the non-contact on-line measurement of the surface temperature of the high-speed rotor is realized, the circumferential temperature difference can be identified, the non-uniformity degree of the rotor temperature distribution is obtained, and powerful support is provided for realizing the on-line estimation of the rotor thermal bending quantity and vibration fault diagnosis.
Drawings
FIG. 1 is a schematic diagram of a system of the present utility model;
FIG. 2 is a schematic view of a rotor according to the present utility model;
wherein, 1, an infrared sensor; 2. an eddy current key phase sensor; 3. a rotor; 4. and (5) measuring the temperature.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model comprises an infrared sensor 1 and an eddy current key phase sensor 2, wherein the infrared sensor 1 and the eddy current key phase sensor 2 are directed to a rotor 3, the infrared sensor 1 is used for collecting the surface temperature of the rotor 3, the eddy current key phase sensor 2 is used for collecting the rotating speed of the rotor 3, and the infrared sensor 1 and the eddy current key phase sensor 2 are both connected with an upper computer. The infrared sensor 1 and the eddy current key phase sensor 2 are arranged on the same axial plane of the rotor 3. The infrared sensor 1 sends a current or voltage signal to the upper computer, and the eddy current key phase sensor 2 sends a voltage signal to the upper computer.
Preferably, the infrared sensor 1 employs a high frequency response infrared sensor.
A high frequency response temperature sensor is used to collect the rotor surface temperature at the exposed portion of the journal near the rotor section where temperature non-uniformity is likely to occur, such as the bearing where Morton effect is likely to occur. The infrared sensor 1 and the eddy current key phase sensor 2 are directed to the exposed portion of the bearing side journal.
The acquisition frequency of the infrared sensor 1 is at least 10 times the rotation frequency of the rotor 3. There are at least 10 temperature measurement points 4 in the circumferential direction of the rotor 3. It is ensured that more than 10 temperature data points can be acquired for each rotation of the rotor to identify the circumferential temperature difference of the rotor surface. Taking a 50Hz rotating device as an example, the number of temperature samples per week exceeds 10, and the temperature sensor and measurement system sampling frequency is at least 500Hz.
Besides the temperature signal, the collector is connected with a key phase signal of which the pulse appears once in one circle, and the highest temperature and the lowest temperature between the triggering of two adjacent key phase pulses are used as characteristic values to be recorded in a database. According to the angle difference between the highest temperature point and the key phase, the phase of the temperature high point is calculated and is recorded in a database as a phase characteristic value, and can be inquired in a form of historical data.
Examples:
referring to fig. 1 and 2, taking a rotor of a steam turbine generator set as an example, measuring sections can be arranged near a sealing tile on the excitation side of the rotor of the generator, near the excitation side bearing, on the surface of a slip ring rotor and at the excitation bearing, each measuring section is provided with a measuring point, and a high-frequency response infrared sensor is used for collecting the surface temperature of the rotor. The rotating speed of the turbogenerator is 3000r/min when the turbogenerator operates, the response time of the high-frequency response infrared sensor is less than 1ms, and the number of temperature sampling points per week is more than 20. The temperature near the bearing is generally 10-80 ℃, and the high-frequency response infrared sensor outputs current or voltage signals to the upper computer. The host computer can be connected with a high-frequency response infrared sensor (current or voltage) and a key phase signal (voltage) sent by the electric vortex key phase sensor 2. And intercepting data acquired in the process of rotating the rotor for one circle according to the key phase pulse signals, and drawing a time domain graph. Taking data in one period, finding the maximum value and the minimum value, calculating the average value, calculating the peak-valley difference, and the phases of the highest point and the lowest point, and recording the characteristic values.
According to the angle difference between the highest temperature point and the key phase, the phase of the temperature high point is calculated and is recorded in a database as a phase characteristic value, and can be inquired in a form of historical data.
The measured circumferential temperature deviation of the rotor surface is used for extrapolating the temperature distribution of other unmeasured sections by using an interpolation method, and then the thermal bending quantity of the rotor is obtained by using a thermosetting coupling model calculation method and the like, so that the basis can be provided for vibration fault diagnosis.
Claims (6)
1. The utility model provides a high-speed pivot surface temperature on-line monitoring device, its characterized in that, including infrared sensor (1) and electric vortex key phase sensor (2), infrared sensor (1) and electric vortex key phase sensor (2) are directional rotor (3), and infrared sensor (1) are used for gathering the surface temperature of rotor (3), and electric vortex key phase sensor (2) are used for gathering the rotational speed of rotor (3), and upper computer is all connected to infrared sensor (1) and electric vortex key phase sensor (2).
2. The high-speed rotating shaft surface temperature on-line monitoring device according to claim 1, wherein the infrared sensor (1) is a high-frequency response infrared sensor.
3. An on-line monitoring device for the surface temperature of a high-speed rotating shaft according to claim 1, wherein the infrared sensor (1) and the eddy current key phase sensor (2) are directed to the exposed part of the side shaft neck of the bearing.
4. The on-line monitoring device for the surface temperature of a high-speed rotating shaft according to claim 1, wherein the acquisition frequency of the infrared sensor (1) is at least 10 times the rotation frequency of the rotor (3).
5. An on-line monitoring device for the surface temperature of a high-speed rotating shaft according to claim 1, wherein at least 10 temperature measuring points (4) are arranged on the circumference of the rotor (3).
6. The on-line monitoring device for the surface temperature of the high-speed rotating shaft according to claim 1, wherein the infrared sensor (1) sends a current or voltage signal to the upper computer, and the eddy current key phase sensor (2) sends a voltage signal to the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320982270.1U CN219956718U (en) | 2023-04-26 | 2023-04-26 | High-speed rotating shaft surface temperature on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320982270.1U CN219956718U (en) | 2023-04-26 | 2023-04-26 | High-speed rotating shaft surface temperature on-line monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219956718U true CN219956718U (en) | 2023-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320982270.1U Active CN219956718U (en) | 2023-04-26 | 2023-04-26 | High-speed rotating shaft surface temperature on-line monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219956718U (en) |
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2023
- 2023-04-26 CN CN202320982270.1U patent/CN219956718U/en active Active
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