CN115372411A - Device and method for measuring surface temperature of turbine rotor - Google Patents
Device and method for measuring surface temperature of turbine rotor Download PDFInfo
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- CN115372411A CN115372411A CN202210959701.2A CN202210959701A CN115372411A CN 115372411 A CN115372411 A CN 115372411A CN 202210959701 A CN202210959701 A CN 202210959701A CN 115372411 A CN115372411 A CN 115372411A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
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Abstract
The invention relates to the technical field of molecular pumps, and provides a device and a method for measuring the surface temperature of a turbine rotor, wherein the device comprises the following components: the infrared receiver is used for acquiring infrared radiation intensity information of the surface of the turbine rotor in real time; the imager is in signal connection with the infrared receiver and is used for receiving the infrared radiation intensity information and converting the infrared radiation intensity information into temperature information; the temperature indicating coating is suitable for being sprayed on the surface of the turbine rotor and can display different colors according to the temperature of different positions on the surface of the turbine rotor; an infrared radiation shielding coating adapted to be sprayed on a blade of a turbine rotor; the stripping device has a cylindrical body and is suitable for inserting the turbine rotor. The device for measuring the surface temperature of the turbine rotor provided by the invention can accurately measure the surface temperature of the turbine rotor on the premise of not changing the structure of the molecular pump to be measured correspondingly, and does not need to add some additional procedures in the assembly stage, thereby being beneficial to improving the assembly efficiency.
Description
Technical Field
The invention relates to the technical field of molecular pumps, in particular to a device and a method for measuring the surface temperature of a turbine rotor.
Background
The molecular pump is a commonly used vacuum obtaining device, a connecting cavity is formed in the molecular pump, a turbine rotor is installed in the connecting cavity, and when the molecular pump works, the turbine rotor rotating at a high speed compresses gas molecules in the connecting cavity and enables the gas molecules to obtain a directional speed to be discharged to an exhaust port.
In the prior art, when the surface temperature of the turbine rotor of the molecular pump is measured, a temperature sensor is usually embedded in the turbine rotor, so that the surface temperature of the turbine rotor is indirectly measured, the structure of the molecular pump to be measured needs to be correspondingly changed, and some additional processes are added in the assembly stage. Furthermore, this indirect measurement approach also does not facilitate accurate measurement of the surface temperature of the turbine rotor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is that in the prior art, when the surface temperature of the turbine rotor of the molecular pump is measured, the structure of the molecular pump to be measured needs to be changed accordingly, and some additional processes are added in the assembly stage. In addition, the indirect measurement mode is not beneficial to accurately measuring the surface temperature of the turbine rotor, so that the device and the method for measuring the surface temperature of the turbine rotor are provided.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an apparatus for measuring a surface temperature of a turbine rotor, comprising: the infrared receiver is used for acquiring infrared radiation intensity information of the surface of the turbine rotor in real time; the imager is in signal connection with the infrared receiver and is used for receiving the infrared radiation intensity information and converting the infrared radiation intensity information into temperature information; a temperature indicating coating adapted to be sprayed on a surface of a turbine rotor, the temperature indicating coating capable of displaying different colors depending on temperatures at different locations of the turbine rotor surface; an infrared radiation shielding coating adapted to be sprayed onto a blade of a turbine rotor to limit the outward emission of infrared radiation by the blade; the stripping device has a cylindrical body and is suitable for inserting the turbine rotor; one end of the stripping device is provided with a fan adapted to blow air to rotate the blades of the turbine rotor.
Further, the device for measuring the surface temperature of the turbine rotor also comprises a color chart which is suitable for being compared with the color of the temperature indicating coating to obtain the highest temperature values at different positions on the surface of the turbine rotor.
Further, the temperature indicating coating is temperature indicating paint containing organic silicon rubber and organic silicon resin.
Further, the device for measuring the surface temperature of the turbine rotor also comprises a dissolving agent which is suitable for dissolving the organic silicon rubber and the organic silicon resin in the temperature indicating paint so as to loosen the temperature indicating paint relative to the surface of the turbine rotor.
Further, the dissolving agent is xylene.
Furthermore, the device for measuring the surface temperature of the turbine rotor further comprises a paint shielding plate, wherein a paint leaking hole matched with the shape of the blade of the turbine rotor is formed in the surface of the paint shielding plate, and the device is suitable for shielding other blades when the infrared radiation shielding coating is sprayed.
Furthermore, the inner wall of the body of the stripping device is provided with an activated carbon adsorption net which is suitable for adsorbing the temperature indicating coating and the infrared radiation shielding coating which fall off from the blade.
The device for measuring the surface temperature of the turbine rotor further comprises a sensor support, wherein the sensor support is suitable for being arranged between a connecting cavity and a main body cavity of the molecular pump, the input end of the infrared receiver is positioned on one side, facing the connecting cavity, of the sensor support, and the output end of the infrared receiver is positioned on one side, facing the main body cavity, of the sensor support; wherein the turbine rotor is arranged in a connecting chamber of the molecular pump.
A method of measuring turbine rotor surface temperature comprising the steps of: spraying an infrared radiation shielding coating on a certain blade of a turbine rotor to be detected so as to limit the blade to emit infrared radiation outwards; spraying temperature indicating coatings on other blades of the turbine rotor to be measured so as to display different colors when the temperatures at different positions on the surface of the blades are changed; acquiring infrared radiation intensity information of a blade of a turbine rotor sprayed with a temperature indicating coating in real time, and converting the infrared radiation intensity information into temperature information; recording the flash frequency of the blade sprayed with the infrared radiation shielding coating to obtain the rotating speed of the turbine rotor; judging whether the turbine rotor is uniformly heated or not according to the color distribution of the temperature indicating coating on each blade; and stripping the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade by utilizing a centrifugal principle.
Further, the method for measuring the surface temperature of the turbine rotor further comprises the following steps: recording blade temperature information acquired according to the infrared radiation intensity information as a first temperature value; after the turbine rotor is cooled, comparing the color of the temperature indicating coating with a color comparison card to obtain the temperature information of the blade, and recording the temperature information as a second temperature value; and taking the intermediate value of the first temperature value and the second temperature value as the final measurement value of the blade temperature.
Further, before the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade are stripped by utilizing the centrifugal action, a dissolving agent is adopted to spray the blade so as to loosen the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade.
Further, after the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade are peeled off by utilizing the centrifugal action, the peeled temperature indicating coating and the infrared radiation shielding coating are adsorbed by the activated carbon adsorption net.
And further, when the temperature indicating coatings are sprayed on the other blades of the turbine rotor to be detected, the temperature indicating coatings are sprayed on the front surface and the back surface of each blade.
The technical scheme of the invention has the following advantages:
according to the device for measuring the surface temperature of the turbine rotor, the infrared ray radiation intensity information of the turbine rotor is collected in real time through the infrared ray receiver, the temperature information of the turbine rotor is obtained through the imager, the temperature of different positions on the surface of the turbine rotor can be measured through spraying the temperature indicating coating on the surface of the turbine rotor, the heat distribution of the turbine rotor in the rotating process is obtained, whether the turbine rotor is heated uniformly or not can be judged according to the heat distribution, and a basis can be provided for the structure optimization of the subsequent turbine rotor; the infrared radiation shielding coating is sprayed on a certain blade, so that the rotating speed of the turbine rotor can be measured, and the relation between the blade temperature and the rotating speed of the turbine rotor can be obtained; and finally, stripping the temperature indicating coating on the surface of the blade and the infrared radiation shielding coating by using a stripping device, and after the test is finished, the original structure of the turbine rotor cannot be damaged. By the arrangement, the surface temperature of the turbine rotor can be accurately measured on the premise of not changing the structure of the molecular pump to be measured, and additional processes are not required to be added in the assembling stage, so that the assembling efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an exploded view of a partial structure of a molecular pump in an apparatus for measuring a surface temperature of a turbine rotor according to an embodiment of the present invention;
FIG. 2 is a schematic view of a sensor holder installed in a molecular pump in an apparatus for measuring a surface temperature of a turbine rotor according to an embodiment of the present invention;
FIG. 3 is a schematic view (front side) of a sensor mount in an apparatus for measuring the surface temperature of a turbine rotor in an embodiment of the present invention;
FIG. 4 is a schematic view (reverse side) of a sensor mount in an apparatus for measuring the surface temperature of a turbine rotor according to an embodiment of the present invention;
FIG. 5 is a flow chart of a method of measuring turbine rotor surface temperature in an embodiment of the present invention.
1. A turbine rotor; 2. A blade; 3. Connecting the chambers;
4. a sensor holder; 5. An infrared receiver; 6. A main chamber;
7. a top cover; 8. A flange pipe; 9. Welding a flange;
10. an input end; 11. And (4) an output end.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
FIG. 1 is an exploded view of a partial structure of a molecular pump in an apparatus for measuring a surface temperature of a turbine rotor according to an embodiment of the present invention; FIG. 2 is a schematic view of a sensor holder installed in a molecular pump in an apparatus for measuring a surface temperature of a turbine rotor according to an embodiment of the present invention; FIG. 3 is a schematic view (front side) of a sensor mount in an apparatus for measuring the surface temperature of a turbine rotor in an embodiment of the present invention; FIG. 4 is a schematic view (reverse side) of a sensor mount in an apparatus for measuring the surface temperature of a turbine rotor according to an embodiment of the present invention; as shown in fig. 1, 2, 3 and 4, the present embodiment provides an apparatus for measuring a surface temperature of a turbine rotor, including: the infrared receiver 5 can aim at the setting of turbine rotor 1, and infrared receiver 5 includes input 10 and output 11, and the infrared radiation intensity information on 1 surface of turbine rotor can be gathered in real time to input 10, and output 11 can be sent out infrared radiation intensity information. The imager is in signal connection with the infrared receiver 5, and can receive the infrared radiation intensity information sent by the output end 11 and convert the infrared radiation intensity information into temperature information, so that a user can directly obtain the surface temperature value of the turbine rotor 1. The temperature indicating coating is suitable for being sprayed on the surface of the turbine rotor 1, wherein the temperature indicating coating can be sprayed on the blade 2 of the turbine rotor 1 during measurement, and the temperature indicating coating can be sprayed on the front surface and the back surface of the blade 2. For example, the temperature indicating coating may be sprayed on some blades 2 of the turbine rotor 1, for example, the temperature indicating coating may be sprayed only on one of two adjacent blades 2, and during spraying, only the blade 2 and the root thereof may be sprayed, so that the cost may be saved on the premise of meeting the measurement requirement, and the workload of subsequently peeling off the temperature indicating coating may also be reduced. The temperature indicating coating may be temperature indicating paint or film, which can display different colors according to the temperature of different positions on the surface of the turbine rotor 1. For the same blade, if the heat distribution at different positions is not uniform, the temperature indicating coating can display different colors, and the blade can be detected to have material defects in the casting process through color difference, so that reference is provided for subsequent quality control.
The device for measuring the surface temperature of the turbine rotor further comprises an infrared radiation shielding coating, for example, the infrared radiation shielding coating can be black high-temperature-resistant paint or a black thin film, or can be formed by directly adding black pigment into temperature-indicating paint and uniformly stirring, and is suitable for being sprayed on a certain blade 2 of the turbine rotor 1 so as to limit the blade 2 from emitting infrared radiation outwards. So set up, can make this blade 2 when changeing to infrared receiver 5 department, infrared receiver 5 produces the low level, and the frequency that the low level appears is recorded through the mode of timing, and then can calculate blade 2's rotational speed to this obtains the relation between blade 2 rotational speed and the temperature, subsequent experimental analysis that carries on that can be better.
The device for measuring the surface temperature of the turbine rotor further comprises a stripping device, wherein the body of the stripping device is of a cylindrical structure and is suitable for inserting the turbine rotor 1; one end of the stripping device is provided with a fan adapted to blow air to rotate the blades 2 of the turbine rotor 1. During the use, the blast air through the fan makes blade 2 rotatory, through the centrifugal force effect that air flow and blade 2 rotatory production, can make temperature indicating coating and infrared radiation shielding coating drop completely from blade 2, and blade 2 surface not damaged.
According to the device for measuring the surface temperature of the turbine rotor, the infrared radiation intensity information of the turbine rotor is collected in real time through the infrared receiver, the temperature information of the turbine rotor is obtained through the imager, the temperature of different positions on the surface of the turbine rotor can be measured through spraying the temperature indicating coating on the surface of the turbine rotor, the heat distribution of the turbine rotor in the rotating process is obtained, whether the turbine rotor is heated uniformly or not can be judged according to the heat distribution, and a basis can be provided for the structural optimization of the subsequent turbine rotor; the infrared radiation shielding coating is sprayed on a certain blade, so that the rotating speed of the turbine rotor can be measured, and the relation between the blade temperature and the rotating speed of the turbine rotor can be obtained; and finally, stripping the temperature indicating coating on the surface of the blade and the infrared radiation shielding coating by using a stripping device, and after the test is finished, the original structure of the turbine rotor cannot be damaged. By the arrangement, the surface temperature of the turbine rotor can be accurately measured on the premise of not changing the structure of the molecular pump to be measured, and additional processes are not required to be added in the assembling stage, so that the assembling efficiency is improved.
Wherein the device for measuring the temperature of the surface of the turbine rotor further comprises a colorimetric card, the color of the temperature indicating coating changes according to the temperature change of the blade 2, but the change is irreversible, that is, even after the blade 2 is cooled, the temperature indicating coating can still maintain the corresponding color when the blade 2 is at the highest temperature. During measurement, after the blade 2 is cooled, the color of the temperature indicating coating is compared with the color of the color chart, and then the maximum temperature values of different positions on the surface of the turbine rotor 1 can be obtained. Of course, it is also intuitively possible to judge whether the blade 2 is uniformly heated when rotating from the color distribution of the temperature indicating coating on the blade 2.
Wherein the temperature indicating coating is temperature indicating paint containing organic silicon rubber and organic silicon resin.
The device for measuring the surface temperature of the turbine rotor further comprises a dissolving agent, the dissolving agent is sprayed on the blades after measurement is completed, and the organic silicon rubber and the organic silicon resin in the temperature indicating paint are dissolved, so that the temperature indicating paint is loosened relative to the surface of the turbine rotor 1, and therefore the device is easier to strip and is beneficial to improving the stripping effect. Preferably, the dissolving agent is xylene.
So set up, can not only increase the stickness of temperature indicating lacquer, avoid under the environment of high speed and high temperature paint vehicle to appear peeling off. And after temperature measurement, the organic silicon rubber and the organic silicon resin in the temperature indicating paint are dissolved in a mode of spraying dimethylbenzene, so that the viscosity of the temperature indicating paint and the blade 2 is loosened, and the temperature indicating paint is convenient to strip without damage subsequently.
Wherein, this measure device of turbine rotor surface temperature still includes and hides the lacquer board, and the face that hides the lacquer board is provided with the hourglass lacquer hole with 2 shape looks adaptations of blade of turbine rotor 1, is suitable for sheltering from other blades 2 when the spraying infrared radiation shielding coating. During the use, can adopt and hide the lacquer board and only expose the blade 2 of treating the spraying infrared radiation shielding coating, prevent to spray other positions of turbine rotor 1, influence the measurement effect.
Wherein, stripping off device's body inner wall is provided with the active carbon adsorption net, and the temperature indicating lacquer is adsorbed by the active carbon adsorption net, avoids dropping once more on turbine rotor 1.
The device for measuring the surface temperature of the turbine rotor further comprises a sensor support 4, the sensor support 4 can be of a disc-shaped structure, and during measurement, the sensor support 4 can be clamped between the connection cavity 3 and the main body cavity of the molecular pump; wherein, the input end 10 of the infrared receiver 5 is positioned on one side of the sensor bracket 4 facing the connecting chamber 3, and the output end 11 of the infrared receiver 5 is positioned on one side of the sensor bracket 4 facing the main body chamber; wherein the turbine rotor 1 of the molecular pump is arranged in the connection chamber 3 of the molecular pump. In use, the input end 10 of the infrared receiver 5 is aligned with the turbine rotor 1 as much as possible in order to improve the measurement.
FIG. 5 is a flow chart of a method of measuring a surface temperature of a turbine rotor in an embodiment of the present invention, and as shown in FIG. 5, another embodiment provides a method of measuring a surface temperature of a turbine rotor, comprising the steps of: spraying an infrared radiation shielding coating on a certain blade of a turbine rotor to be detected so as to limit the blade to emit infrared radiation outwards; spraying temperature indicating coatings on other blades of the turbine rotor to be measured so as to display different colors when the temperatures at different positions on the surface of the blades are changed; acquiring infrared radiation intensity information of a blade of a turbine rotor sprayed with a temperature indicating coating in real time, and converting the infrared radiation intensity information into temperature information; recording the flash frequency of the blade sprayed with the infrared radiation shielding coating to obtain the rotating speed of the turbine rotor; judging whether the turbine rotor is uniformly heated or not according to the color distribution of the temperature indicating coatings on the blades; and stripping the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade by utilizing a centrifugal principle.
Wherein, the method for measuring the surface temperature of the turbine rotor further comprises the following steps: recording blade temperature information acquired according to the infrared radiation intensity information as a first temperature value; after the turbine rotor is cooled, comparing the color of the temperature indicating coating with a color comparison card to obtain the temperature information of the blade, and recording the temperature information as a second temperature value; and taking the intermediate value of the first temperature value and the second temperature value as the final measurement value of the blade temperature.
Before the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade are stripped by utilizing the centrifugal action, a dissolving agent is adopted to spray the blade so as to loosen the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade.
After the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade are peeled off by utilizing the centrifugal action, the peeled temperature indicating coating and the infrared radiation shielding coating are adsorbed by the activated carbon adsorption net.
When the temperature indicating coatings are sprayed on the other blades of the turbine rotor to be tested, the temperature indicating coatings are sprayed on the front surface and the back surface of each blade.
Specifically, during measurement, firstly, the temperature indicating paint is sprayed on the blade 2 of the turbine rotor 1 to be tested at intervals, the upper surface and the lower surface of the blade 2 can be sprayed with the temperature indicating paint, and whether the temperature distribution of the upper surface and the lower surface of the blade 2 is uniform can be judged.
Next, an infrared radiation shielding coating is sprayed on a certain blade 2 through a paint shielding plate.
Then, the infrared receiver 5 is installed on the sensor support 4 and located right above the position where the infrared radiation shielding coating is located as much as possible, then the sensor support 4 is installed between the connecting chamber 3 and the main chamber 6, then the top cover 7, the flange pipe 8 and the welding flange 9 of the main chamber 6 are installed, finally wiring is conducted, and installation of the measuring device is completed.
Afterwards, start molecular pump and infrared receiver 5, observe that turbine rotor 1 is located the temperature variation that infrared receiver 5 just is right to the region, observe the color change of each part of blade 2 through the imager, do a preliminary judgement to blade 2 surface temperature, the temperature value of acquireing is marked as first temperature value. At the same time, the infrared receiver calculates and records the rotor speed according to the number of times the infrared radiation shielding coating has flashed.
After the detection is finished, the molecular pump is dismounted, the color distribution change of the temperature indicating paint is observed after the turbine rotor 1 is cooled, and whether the blades have local quality defects or not is judged; the temperature of blade 2 is later obtained through the colour comparison card, marks as the second temperature value, compares with the first temperature value that obtains through the heat radiation, takes the median of first temperature value and second temperature value to come as the final measured value of the temperature of blade 2 to provide data support for the optimization of follow-up blade 2 structure and molecular pump overall performance.
Then, the turbine rotor 1 is taken out, xylene is sprayed on the blades 2 in a closed environment, the blades 2 are inserted into a stripping device after standing for a period of time, the blades 2 are rotated by blowing of a fan, and the temperature indicating paint and the infrared radiation shielding coating can completely fall off from the blades 2 and be adsorbed by an activated carbon adsorption net under the centrifugal action generated by air flow and rotation of the blades 2, so that the temperature indicating paint and the infrared radiation shielding coating are prevented from falling on the turbine rotor again.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (13)
1. An apparatus for measuring a temperature of a surface of a turbine rotor, comprising:
the infrared receiver is used for acquiring infrared radiation intensity information of the surface of the turbine rotor in real time;
the imager is in signal connection with the infrared receiver and is used for receiving the infrared radiation intensity information and converting the infrared radiation intensity information into temperature information;
the temperature indicating coating is suitable for being sprayed on the surface of the turbine rotor and can display different colors according to the temperature of different positions of the surface of the turbine rotor;
an infrared radiation shielding coating adapted to be sprayed onto a blade of a turbine rotor to limit the outward emission of infrared radiation by the blade;
the stripping device has a cylindrical body and is suitable for inserting the turbine rotor; one end of the stripping device is provided with a fan adapted to blow air to rotate the blades of the turbine rotor.
2. The apparatus for measuring a surface temperature of a turbine rotor of claim 1,
the color comparison device further comprises a color comparison card which is suitable for being compared with the color of the temperature indicating coating to obtain the highest temperature value at different positions on the surface of the turbine rotor.
3. The apparatus for measuring the surface temperature of the turbine rotor according to claim 1, wherein the temperature indicating coating is a temperature indicating paint containing silicone rubber and silicone resin.
4. The apparatus for measuring a surface temperature of a turbine rotor of claim 3,
the temperature indicating paint also comprises a dissolving agent which is suitable for dissolving the organic silicon rubber and the organic silicon resin in the temperature indicating paint so as to loosen the temperature indicating paint relative to the surface of the turbine rotor.
5. The apparatus for measuring turbine rotor surface temperature of claim 4, wherein the dissolving agent is xylene.
6. The apparatus for measuring a surface temperature of a turbine rotor of claim 1,
the device is characterized by further comprising a paint shielding plate, wherein a paint leakage hole matched with the blade shape of the turbine rotor is formed in the surface of the paint shielding plate, and the paint leakage hole is suitable for spraying the infrared radiation shielding coating to shield other blades.
7. The apparatus for measuring a surface temperature of a turbine rotor of claim 1,
the inner wall of the body of the stripping device is provided with an activated carbon adsorption net which is suitable for adsorbing the temperature indicating coating and the infrared radiation shielding coating which fall off from the blade.
8. The apparatus for measuring a surface temperature of a turbine rotor of claim 1,
the sensor support is suitable for being arranged between a connecting cavity and a main body cavity of the molecular pump, the input end of the infrared receiver is positioned on one side, facing the connecting cavity, of the sensor support, and the output end of the infrared receiver is positioned on one side, facing the main body cavity, of the sensor support;
wherein the turbine rotor is arranged in a connecting chamber of the molecular pump.
9. A method of measuring the temperature of a surface of a turbine rotor, comprising the steps of:
spraying an infrared radiation shielding coating on a certain blade of a turbine rotor to be detected so as to limit the blade to emit infrared radiation outwards;
spraying temperature indicating coatings on other blades of the turbine rotor to be measured so as to display different colors when the temperatures at different positions on the surface of the blades are changed;
acquiring infrared radiation intensity information of a blade of a turbine rotor sprayed with a temperature indicating coating in real time, and converting the infrared radiation intensity information into temperature information;
recording the flash frequency of the blade sprayed with the infrared radiation shielding coating to obtain the rotating speed of the turbine rotor;
judging whether the turbine rotor is uniformly heated or not according to the color distribution of the temperature indicating coatings on the blades;
and stripping the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade by utilizing a centrifugal principle.
10. The method of measuring a turbine rotor surface temperature of claim 9, further comprising the steps of:
recording the blade temperature information acquired according to the infrared radiation intensity information as a first temperature value;
after the turbine rotor is cooled, comparing the color of the temperature indicating coating with a color comparison card to obtain the temperature information of the blade, and recording the temperature information as a second temperature value;
and taking the intermediate value of the first temperature value and the second temperature value as the final measurement value of the blade temperature.
11. The method of measuring the temperature of a surface of a turbine rotor as claimed in claim 9, wherein the blade is sprayed with a solvent to loosen the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade before the temperature indicating coating and the infrared radiation shielding coating on the surface of the blade are peeled off by centrifugation.
12. The method for measuring the surface temperature of the turbine rotor according to claim 9, wherein the detached temperature indicating coating and infrared radiation shielding coating are adsorbed by an activated carbon adsorption net after the temperature indicating coating and infrared radiation shielding coating on the surface of the blade are peeled off by centrifugal action.
13. The method for measuring the surface temperature of the turbine rotor according to claim 9, wherein the temperature indicating coating is sprayed on both the front and back surfaces of the blade when the temperature indicating coating is sprayed on the remaining blades of the turbine rotor to be measured.
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| CN202210959701.2A CN115372411A (en) | 2022-08-09 | 2022-08-09 | Device and method for measuring surface temperature of turbine rotor |
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| CN202210959701.2A CN115372411A (en) | 2022-08-09 | 2022-08-09 | Device and method for measuring surface temperature of turbine rotor |
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