CN113187565A - Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder - Google Patents
Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder Download PDFInfo
- Publication number
- CN113187565A CN113187565A CN202110683694.3A CN202110683694A CN113187565A CN 113187565 A CN113187565 A CN 113187565A CN 202110683694 A CN202110683694 A CN 202110683694A CN 113187565 A CN113187565 A CN 113187565A
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- temperature measuring
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- 238000005520 cutting process Methods 0.000 title claims abstract description 18
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 29
- 238000002955 isolation Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing 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
- 238000005192 partition 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
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
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- 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 invention relates to a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant, which comprises a temperature measuring support fixed on the inner surface of a cylinder, wherein the temperature measuring support comprises a first arc-shaped fixing frame, a radial support and a second arc-shaped fixing frame, a radial temperature measuring hole is formed in the middle of the second arc-shaped fixing frame, a radial mounting hole is formed in the middle of the first arc-shaped fixing frame, a temperature sleeve penetrates through the radial mounting hole and the radial temperature measuring hole, 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 formed in the shell of the cylinder. This application is through setting up the temperature measurement support that comprises first arc mount, second arc mount, radial support, and the temperature sleeve pipe is installed on the temperature measurement support for the temperature sleeve pipe is reliable in the installation of cylinder, and the temperature measurement support still can protect the temperature sleeve pipe and prevent temperature sleeve pipe and turbine blade collision, 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 the power plant.
Background
Along with the continuous expansion of the unit capacity of a power plant, the improvement of the economical efficiency and the safe reliability of the unit operation are very important, the decoupling operation of power production and thermal production can be realized by cutting off the operation mode of a low-pressure cylinder, and the heat supply peak regulation capacity of the thermoelectric unit is improved. In the transformation of the low-pressure cylinder cutting cylinder of the existing steam turbine, the temperature detection is mostly positioned at the blade top of the final-stage active blade, the temperature of the root part of the blade cannot be measured, the blade is connected with the hub through the root part, the centrifugal tensile stress and the shearing stress of the rotor during high-speed rotation are born by the root part of the blade, the fracture of the blade and the hub is easily caused when the temperature of the root part of the blade exceeds an allowable value, and great influence is generated on the safe operation of a unit. The temperature measuring device for the steam turbine rotor hub after cylinder cutting and transformation of the low-pressure cylinder of the coal-fired power plant comprises a low-pressure cylinder, cylinder sealing grease, a first square groove and a sealing and welding block, wherein a low-pressure cylinder joint surface is installed at the top end of the low-pressure cylinder, the cylinder sealing grease is arranged at the top end of the low-pressure cylinder joint surface, the first square groove is uniformly arranged at the top end of the low-pressure cylinder joint surface, temperature measuring elements are installed inside a first temperature sleeve and a second temperature sleeve, the second square groove is uniformly arranged at the top end of a partition plate, a limiting ring is sleeved at the bottom end of the second temperature sleeve, and a soldering tin bar is installed at the bottom end of the partition plate; according to the invention, the temperature of the last-stage wheel drum of the steam turbine rotor is monitored in real time, so that the temperature sleeve is prevented from being collided and abraded with the movable blades in the running process of the unit, the failure of a measuring point caused by vibration of the temperature sleeve in the running process of the unit is prevented, and the tightness of a cylinder joint surface after the temperature is installed in a groove is ensured. However, in the temperature measuring device disclosed in this document, the reliability of the mounting and fixing structure of the second temperature bushing is poor, and improvement is demanded.
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 a temperature measuring support fixed on the inner surface of a cylinder, wherein the temperature measuring support comprises a first arc-shaped fixing frame fixedly connected with the inner surface of the cylinder, radial supports extending towards the rotor hub are arranged at two ends of the first arc-shaped fixing frame, a second arc-shaped fixing frame parallel to the first arc-shaped fixing frame is arranged at the end parts of the two radial supports, a radial temperature measuring hole is arranged in the middle of the second arc-shaped fixing frame, a radial mounting hole is arranged in the middle of the first arc-shaped fixing frame, a temperature sleeve is arranged in the radial mounting hole and the radial temperature measuring 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.
The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder, provided by the invention, is also characterized by comprising the following technical characteristics:
furthermore, the joint surface of the cylinder is provided with the sleeve mounting hole.
Furthermore, 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 sensing holes are further formed in the middle positioning frame.
Furthermore, a first positioning ring matched with the radial temperature measuring hole is arranged on the temperature sleeve.
Furthermore, a second positioning ring matched with the radial mounting hole is arranged on the temperature sleeve.
Furthermore, 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.
Furthermore, an arc isolation groove is further formed in the first arc-shaped fixing frame.
Furthermore, a radial isolation groove is formed in the radial support.
The invention has the following beneficial effects: according to the temperature measurement device, the temperature measurement support is formed by the first arc-shaped fixing frame, the second arc-shaped fixing frame and the radial support, the temperature sleeve is arranged on the temperature measurement support, so that the temperature sleeve can be reliably arranged in the cylinder, and the temperature measurement support can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blade; particularly, the temperature support is fixed on the inner surface of the cylinder and located between the last-stage driving blade and the next-last-stage driving blade, the length of the radial support is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, 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 non-contact temperature measurement can be conducted on the rotor hub through the temperature sleeve arranged on the temperature measurement support.
Drawings
FIG. 1 is a schematic structural diagram of a rotor hub temperature measuring device for a low-pressure cylinder of a power plant according to an embodiment of the invention;
FIG. 2 is a schematic structural view of another perspective of the rotor hub temperature measuring device of FIG. 1;
FIG. 3 is a schematic structural 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 according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the embodiment of the rotor hub temperature measuring device for the low-pressure cutting cylinder of the power plant shown in figures 1 to 4, this a rotor wheel hub temperature measuring device for power plant's low pressure cylinder cuts jar is including fixing the temperature measurement support 10 at the cylinder internal surface, temperature measurement support 10 includes the first arc mount 11 that links to each other with cylinder internal surface fixed, the both ends of first arc mount 11 are equipped with the radial support 13 to rotor wheel hub extension, the tip of two radial supports 13 is equipped with the second arc mount 12 parallel with first arc mount 11, the middle part of second arc mount 12 is equipped with radial temperature measurement hole 101, the middle part of first arc mount 11 is equipped with radial mounting hole 102, temperature sleeve 20 wears to establish at radial mounting hole 102, in the radial temperature measurement hole 101, radial temperature measurement hole 101 is stretched out to the tip of temperature sleeve 20, be equipped with the sleeve pipe mounting hole that corresponds with temperature sleeve 20 on the casing of cylinder. According to the temperature measurement device, the temperature measurement support is formed by the first arc-shaped fixing frame, the second arc-shaped fixing frame and the radial support, the temperature sleeve is arranged on the temperature measurement support, so that the temperature sleeve can be reliably arranged in the cylinder, and the temperature measurement support can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blade; particularly, the temperature support is fixed on the inner surface of the cylinder and located between the last-stage driving blade and the next-last-stage driving blade, the length of the radial support is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, 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 non-contact temperature measurement can be conducted on the rotor hub through the temperature sleeve arranged on the temperature measurement support.
In one embodiment of the present application, it is preferable that the casing mounting hole corresponding to the temperature casing is provided on the cylinder joining surface of the steam turbine, whereby additional drilling on the cylinder housing is not 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 further provided with a plurality of side temperature sensing holes 123 communicated with the radial temperature sensing holes 101, the middle positioning frame 121 is connected with the radial support 13 through the plurality of arc-shaped connecting strips 122, and an isolation gap is formed among the plurality of arc-shaped connecting strips 122 to reduce the temperature transmission between the radial support 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 in full contact 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 can be understood that, since the second arc-shaped fixing frame is close to the rotor hub, although the end part of the temperature sleeve does not contact the rotor hub, a measured temperature which is relatively close to the actual temperature of the rotor hub can be obtained through the temperature sleeve which is installed close to the rotor hub, and the measured temperature is equivalent to the actual temperature of the rotor hub, so that the temperature of the rotor hub is detected through the non-contact temperature measurement.
In an embodiment of the present application, preferably, the temperature sleeve 20 is provided with a first positioning ring 21 which is matched with the radial temperature measuring hole 101, so as to facilitate the installation and positioning of the temperature sleeve, and prevent the end of the temperature sleeve from extending out of the second arc-shaped fixing frame too long to collide with the rotor hub. Preferably, the temperature sleeve 20 is provided with a second positioning ring 22 which is matched with the radial mounting hole 102, so that the temperature sleeve is reliably mounted on the temperature measuring support.
In an embodiment of the present application, preferably, a groove communicated with the radial mounting hole 102 is further formed on a 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, thereby facilitating the mounting and fixing of the temperature sleeve. Preferably, the first arc-shaped fixing frame 11 is further provided with an arc-shaped isolation groove 111, and the radial support 13 is provided with a radial isolation groove 131, so that the weight of the temperature measurement support is reduced while the structural strength of the temperature measurement support 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 examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a rotor wheel hub temperature measuring device for power plant's low pressure cylinder cuts jar which characterized in that, is including fixing the temperature measurement support at the cylinder internal surface, the temperature measurement support includes the first arc mount that links to each other with cylinder internal surface fixed, the both ends of first arc mount are equipped with the radial support that extends to rotor wheel hub, two the tip of radial support be equipped with the parallel second arc mount of first arc mount, the middle part of second arc mount is equipped with radial temperature measurement hole, the middle part of first arc mount is equipped with radial mounting hole, and the temperature sleeve pipe wears to establish radial mounting hole in the radial temperature measurement hole, the sheathed tube tip of temperature stretches out radial temperature measurement hole, be equipped with on the casing of cylinder with the sleeve pipe mounting hole that the temperature sleeve pipe corresponds.
2. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: and the joint surface of the cylinder is provided with the sleeve mounting hole.
3. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: the second arc-shaped fixing frame comprises a middle positioning frame and a plurality of arc-shaped connecting strips, and a plurality of lateral temperature sensing holes communicated with the radial temperature sensing holes are further formed in the middle positioning frame.
4. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: and a first positioning ring matched with the radial temperature measuring hole is arranged on the temperature sleeve.
5. The temperature measuring device for the rotor hub of the low-pressure cutting cylinder of the power plant as claimed in claim 4, wherein: and a second positioning ring matched with the radial mounting hole is arranged on the temperature sleeve.
6. The temperature measuring device for the rotor hub of the low-pressure cutting cylinder of the power plant as claimed in claim 5, wherein: the side of the first arc-shaped fixing frame is also provided with a groove communicated with the radial mounting hole, and the temperature sleeve is provided with a positioning block matched with the groove.
7. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: an arc isolation groove is further formed in the first arc fixing frame.
8. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in 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 true CN113187565A (en) | 2021-07-30 |
| CN113187565B 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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| Country | Link |
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| CN (1) | CN113187565B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306494A (en) * | 2022-06-24 | 2022-11-08 | 华能国际电力江苏能源开发有限公司南通电厂 | Installation fixing device of steam turbine moving blade state characteristic monitoring system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060275126A1 (en) * | 2005-06-02 | 2006-12-07 | Honeywell International, Inc. | Turbine rotor hub contour |
| 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 |
-
2021
- 2021-06-21 CN CN202110683694.3A patent/CN113187565B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060275126A1 (en) * | 2005-06-02 | 2006-12-07 | Honeywell International, Inc. | Turbine rotor hub contour |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306494A (en) * | 2022-06-24 | 2022-11-08 | 华能国际电力江苏能源开发有限公司南通电厂 | Installation fixing device of steam turbine moving blade state characteristic monitoring system |
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| Publication number | Publication date |
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| CN113187565B (en) | 2024-05-24 |
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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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