CN113187565B - Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant - Google Patents
Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant Download PDFInfo
- Publication number
- CN113187565B CN113187565B CN202110683694.3A CN202110683694A CN113187565B CN 113187565 B CN113187565 B CN 113187565B CN 202110683694 A CN202110683694 A CN 202110683694A CN 113187565 B CN113187565 B CN 113187565B
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- temperature
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- radial
- temperature measuring
- shaped fixing
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- 238000005520 cutting process Methods 0.000 title claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims description 7
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/12—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The application relates to a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant, which comprises a temperature measuring bracket fixed on the inner surface of a cylinder, wherein the temperature measuring bracket comprises a first arc-shaped fixing frame, a radial bracket and a second arc-shaped fixing frame, the middle part of the second arc-shaped fixing frame is provided with a radial temperature measuring hole, the middle part of the first arc-shaped fixing frame is provided with a radial mounting hole, a temperature sleeve is arranged in the radial mounting hole in a penetrating manner, the end part of the temperature sleeve extends out of the radial temperature measuring hole, and a sleeve mounting hole corresponding to the temperature sleeve is arranged on a shell of the cylinder. According to the application, the temperature measuring bracket consisting of the first arc-shaped fixing bracket, the second arc-shaped fixing bracket and the radial bracket is arranged, and the temperature sleeve is arranged on the temperature measuring bracket, so that the temperature sleeve is reliably arranged in the cylinder, the temperature measuring bracket can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blade, and the reliability is high.
Description
Technical Field
The invention relates to a control technology of a steam turbine of a thermal power plant, in particular to a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant.
Background
Along with the continuous expansion of the unit capacity of a power plant, the economic performance, the safety and the reliability of the unit operation are improved, the decoupling operation of electric power production and thermal production can be realized by cutting off the operation mode of the low-pressure cylinder, and the heat supply peak regulation capacity of the thermoelectric unit is improved. In the existing steam turbine low-pressure cylinder cutting transformation, temperature detection is positioned at the top of a last-stage driving blade, the temperature of the root of the blade cannot be measured, and as the blade is connected with a hub through the root, the root of the blade bears centrifugal tensile stress and cutting stress when a rotor rotates at a high speed, the temperature of the root of the blade exceeds an allowable value to easily cause the breakage of the blade and the hub, and the safety operation of a unit is greatly influenced. The utility model discloses a "steam turbine rotor hub temperature measuring device after a coal fired power plant's low pressure cylinder cuts jar transformation" of publication No. CN211717647U, including low pressure cylinder, cylinder sealing grease, first square groove and seal welding piece, the low pressure cylinder faying surface is installed on the top of low pressure cylinder, the top of low pressure cylinder faying surface is provided with cylinder sealing grease, the top of low pressure cylinder faying surface evenly is provided with first square groove, temperature measuring element is all installed to the inside of first temperature sleeve pipe and second temperature sleeve pipe, the top of baffle evenly is provided with the second square groove, the retainer plate has been cup jointed to the bottom of second temperature sleeve pipe, the soldering tin strip is installed to the bottom of baffle; according to the invention, the final drum temperature of the steam turbine rotor is monitored in real time, so that the temperature sleeve is prevented from being in collision with the movable blades in the running process of the unit, the temperature sleeve is prevented from vibrating in the running process of the unit, the measuring point is prevented from being invalid, and the tightness of the cylinder joint surface after the grooving installation temperature is ensured. However, in the temperature measuring device disclosed in this document, the reliability of the mounting and fixing structure of the second temperature sleeve is poor, and improvement is needed.
Disclosure of Invention
The invention aims to provide a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant, which is used for detecting the temperature of the root of a blade.
In order to solve the problems, the invention provides a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant, which comprises temperature measuring brackets fixed on the inner surface of a cylinder, wherein each temperature measuring bracket comprises a first arc-shaped fixing frame fixedly connected with the inner surface of the cylinder, radial brackets extending towards a rotor hub are arranged at two ends of each first arc-shaped fixing frame, second arc-shaped fixing frames parallel to the first arc-shaped fixing frames are arranged at the end parts of the two radial brackets, radial temperature measuring holes are arranged in the middle parts of the second arc-shaped fixing frames, radial mounting holes are arranged in the middle parts of the first arc-shaped fixing frames, temperature sleeves are arranged in the radial mounting holes in a penetrating mode, the end parts of the temperature sleeves extend out of the radial temperature measuring holes, and sleeve mounting holes corresponding to the temperature sleeves are arranged on a shell of the cylinder.
The rotor hub temperature measuring device for the low-pressure cylinder cutting of the power plant provided by the invention also has the following technical characteristics:
further, the sleeve mounting hole is formed in the combining surface of the cylinder.
Further, the second arc-shaped fixing frame comprises a middle positioning frame and a plurality of arc-shaped connecting strips, and a plurality of side temperature sensing holes communicated with the radial temperature measuring holes are further formed in the middle positioning frame.
Further, a first positioning ring matched with the radial temperature measuring hole is arranged on the temperature sleeve.
Further, a second positioning ring matched with the radial mounting hole is arranged on the temperature sleeve.
Further, a groove communicated with the radial mounting hole is further formed in the side face of the first arc-shaped fixing frame, and a positioning block matched with the groove is arranged on the temperature sleeve.
Further, an arc isolation groove is further formed in the first arc-shaped fixing frame.
Further, a radial isolation groove is arranged on the radial support.
The application has the following beneficial effects: according to the application, the temperature measuring bracket consisting of the first arc-shaped fixing bracket, the second arc-shaped fixing bracket and the radial bracket is arranged, the temperature sleeve is arranged on the temperature measuring bracket, so that the temperature sleeve is reliably arranged in the cylinder, and the temperature measuring bracket can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blades; specifically, the temperature bracket is fixed on the inner surface of the cylinder and is positioned between the last-stage driving blade and the next-stage driving blade, the length of the radial bracket is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, so that the second arc-shaped fixing frame is close to the outer surface of the rotor hub but is not in contact with the rotor hub, and therefore the non-contact temperature measurement can be carried out on the rotor hub through the temperature sleeve arranged on the temperature bracket.
Drawings
FIG. 1 is a schematic diagram of a rotor hub temperature measuring device for a low pressure cylinder cutting of a power plant according to an embodiment of the invention;
FIG. 2 is a schematic view of a rotor hub temperature measuring device of FIG. 1 from another perspective;
FIG. 3 is a schematic diagram of a temperature measurement bracket according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a temperature sensing sleeve in an embodiment of the invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the embodiment of the rotor hub temperature measuring device for the low-pressure cylinder cutting of the power plant, which is shown in fig. 1 to 4, the rotor hub temperature measuring device for the low-pressure cylinder cutting of the power plant comprises a temperature measuring bracket 10 fixed on the inner surface of a cylinder, the temperature measuring bracket 10 comprises a first arc-shaped fixing bracket 11 fixedly connected with the inner surface of the cylinder, two ends of the first arc-shaped fixing bracket 11 are provided with radial brackets 13 extending towards the rotor hub, two ends of the two radial brackets 13 are provided with a second arc-shaped fixing bracket 12 parallel to the first arc-shaped fixing bracket 11, the middle part of the second arc-shaped fixing bracket 12 is provided with a radial temperature measuring hole 101, the middle part of the first arc-shaped fixing bracket 11 is provided with a radial mounting hole 102, a temperature sleeve 20 is arranged in the radial mounting hole 102 in a penetrating manner, the end part of the temperature sleeve 20 extends out of the radial temperature measuring hole 101, and a sleeve mounting hole corresponding to the temperature sleeve 20 is arranged on the shell of the cylinder. According to the application, the temperature measuring bracket consisting of the first arc-shaped fixing bracket, the second arc-shaped fixing bracket and the radial bracket is arranged, the temperature sleeve is arranged on the temperature measuring bracket, so that the temperature sleeve is reliably arranged in the cylinder, and the temperature measuring bracket can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blades; specifically, the temperature bracket is fixed on the inner surface of the cylinder and is positioned between the last-stage driving blade and the next-stage driving blade, the length of the radial bracket is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, so that the second arc-shaped fixing frame is close to the outer surface of the rotor hub but is not in contact with the rotor hub, and therefore the non-contact temperature measurement can be carried out on the rotor hub through the temperature sleeve arranged on the temperature bracket.
In one embodiment of the application, the cylinder joint surface of the steam turbine is preferably provided with said sleeve mounting hole corresponding to the temperature sleeve, whereby no further drilling of the cylinder housing is required. Preferably, the second arc-shaped fixing frame 12 comprises a middle positioning frame 121 and a plurality of arc-shaped connecting strips 122, the middle positioning frame 121 is also provided with a plurality of side temperature sensing holes 123 communicated with the radial temperature measuring holes 101, the middle positioning frame 121 is connected with the radial bracket 13 through the plurality of arc-shaped connecting strips 122, and the isolation gaps formed among the plurality of arc-shaped connecting strips 122 can reduce the temperature transmission between the radial bracket and the middle positioning frame, so that the temperature near the middle positioning frame is closer to the temperature of the rotor hub; the plurality of side temperature sensing holes enable the end part of the temperature sensing sleeve to be fully contacted with gas near the middle positioning frame, and the temperature at the middle positioning frame is accurately detected, so that the temperature of the rotor hub is obtained; it will be appreciated that since the second arcuate mount is close to the rotor hub, the end of the temperature sleeve, although not in contact with the rotor hub, can obtain a measured temperature relatively close to the actual temperature of the rotor hub by means of the temperature sleeve mounted close to the rotor hub, which measured temperature corresponds to the actual temperature of the rotor hub, whereby the temperature of the rotor hub is detected by means of such non-contact thermometry.
In one embodiment of the present application, preferably, the temperature sleeve 20 is provided with a first positioning ring 21 matched with the radial temperature measuring hole 101, so that the temperature sleeve is convenient to install and position, and the end part of the temperature sleeve is prevented from extending out of the second arc-shaped fixing frame to collide with the rotor hub too long. Preferably, the temperature sleeve 20 is provided with a second positioning ring 22 which is matched with the radial mounting hole 102, thereby ensuring that the temperature sleeve is reliably mounted on the temperature measuring bracket.
In one embodiment of the present application, preferably, a groove communicating with the radial mounting hole 102 is further formed on the side surface of the first arc-shaped fixing frame 11, and a positioning block 23 matched with the groove is formed on the temperature sleeve 20, so that the temperature sleeve is convenient to mount and fix. Preferably, the first arc-shaped fixing frame 11 is also provided with an arc-shaped isolation groove 111, and the radial bracket 13 is provided with a radial isolation groove 131, so that the weight of the temperature measuring bracket is reduced while the structural strength of the temperature measuring bracket is ensured, and the heat transfer between the cylinder shell and the second arc-shaped fixing frame is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The rotor hub temperature measuring device for the low-pressure cylinder cutting of the power plant is characterized by comprising temperature measuring brackets fixed on the inner surface of a cylinder, wherein each temperature measuring bracket comprises a first arc-shaped fixing frame fixedly connected with the inner surface of the cylinder, radial brackets extending towards a rotor hub are arranged at two ends of each first arc-shaped fixing frame, second arc-shaped fixing frames parallel to the first arc-shaped fixing frames are arranged at the end parts of the two radial brackets, radial temperature measuring holes are formed in the middle parts of the second arc-shaped fixing frames, radial mounting holes are formed in the middle parts of the first arc-shaped fixing frames, temperature sleeves are arranged in the radial mounting holes in a penetrating mode, the end parts of the temperature sleeves extend out of the radial temperature measuring holes, and sleeve mounting holes corresponding to the temperature sleeves are formed in a shell of the cylinder; be equipped with on the faying face of cylinder the sleeve pipe mounting hole, the second arc mount includes middle part locating rack and a plurality of arc connecting strip, still be equipped with on the middle part locating rack a plurality of with radial temperature measurement hole intercommunication's lateral part temperature sensing hole, be equipped with on the temperature sleeve pipe with radial temperature measurement hole complex first locating ring, be equipped with on the temperature sleeve pipe with radial mounting hole complex second locating ring, the side of first arc mount still be equipped with radial mounting hole intercommunication's recess, be equipped with on the temperature sleeve pipe with recess complex locating piece.
2. The rotor hub temperature measuring device for a low pressure cylinder cut cylinder of a power plant according to claim 1, wherein: and the first arc-shaped fixing frame is also provided with an arc-shaped isolation groove.
3. The rotor hub temperature measuring device for a low pressure cylinder cut cylinder of a power plant according to claim 1, wherein: and the radial support is provided with a radial isolation groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683694.3A CN113187565B (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683694.3A CN113187565B (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113187565A CN113187565A (en) | 2021-07-30 |
| CN113187565B true CN113187565B (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110683694.3A Active CN113187565B (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant |
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| CN (1) | CN113187565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115306494B (en) * | 2022-06-24 | 2024-09-10 | 华能国际电力江苏能源开发有限公司南通电厂 | Installation fixing device of turbine moving blade state characteristic monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211116148U (en) * | 2019-12-24 | 2020-07-28 | 梁双荣 | Steam turbine low pressure cylinder stage rear exhaust temperature measuring device |
| CN211717647U (en) * | 2020-04-16 | 2020-10-20 | 华能济南黄台发电有限公司 | Temperature measuring device for rotor hub of steam turbine after cylinder cutting reconstruction of low-pressure cylinder of coal-fired power plant |
| CN214787567U (en) * | 2021-06-21 | 2021-11-19 | 国电投河南电力工程有限公司 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7484935B2 (en) * | 2005-06-02 | 2009-02-03 | Honeywell International Inc. | Turbine rotor hub contour |
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2021
- 2021-06-21 CN CN202110683694.3A patent/CN113187565B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211116148U (en) * | 2019-12-24 | 2020-07-28 | 梁双荣 | Steam turbine low pressure cylinder stage rear exhaust temperature measuring device |
| CN211717647U (en) * | 2020-04-16 | 2020-10-20 | 华能济南黄台发电有限公司 | Temperature measuring device for rotor hub of steam turbine after cylinder cutting reconstruction of low-pressure cylinder of coal-fired power plant |
| CN214787567U (en) * | 2021-06-21 | 2021-11-19 | 国电投河南电力工程有限公司 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
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| CN113187565A (en) | 2021-07-30 |
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| CB02 | Change of applicant information |
Address after: No. 177 Fourth Street, Zhengzhou Economic and Technological Development Zone, Zhengzhou City, Henan Province, 450000 Applicant after: State Power Investment Henan Engineering Operation and Maintenance Co.,Ltd. Address before: No.177, 4th Street, economic and Technological Development Zone, Guancheng Hui District, Zhengzhou City, Henan Province, 450000 Applicant before: State power investment Henan Electric Power Engineering Co.,Ltd. |
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