CN110953979A - Wireless transmission system for measuring gap of runner chamber of hydroelectric generating set - Google Patents
Wireless transmission system for measuring gap of runner chamber of hydroelectric generating set Download PDFInfo
- Publication number
- CN110953979A CN110953979A CN201911228657.2A CN201911228657A CN110953979A CN 110953979 A CN110953979 A CN 110953979A CN 201911228657 A CN201911228657 A CN 201911228657A CN 110953979 A CN110953979 A CN 110953979A
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- China
- Prior art keywords
- communication module
- wireless communication
- displacement
- runner chamber
- sensor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention relates to a wireless transmission system for measuring the clearance of a runner chamber of a hydroelectric generating set, wherein a displacement sensor and an angle sensor respectively measure the displacement and angle data of a water turbine blade and the runner chamber and transmit the displacement and angle data to an AD acquisition module; and the AD acquisition module transmits displacement and angle data to the mobile terminal through the first wireless communication module and the second wireless communication module, so that the mobile terminal can realize the data processing optimization of center positioning and gap measurement of the runner chamber, and finally, the auxiliary decision function of the central adjustment of the unit can be completed.
Description
Technical Field
The invention relates to the field of power systems, in particular to a wireless transmission system for measuring the clearance of a runner chamber of a hydroelectric generating set.
Background
Hydroelectric power generation is used as clean energy and is an effective way for adjusting energy structure, developing low-carbon energy, saving energy and reducing emission in China. The hydroelectric generating set is used as the core of hydroelectric generation, and the stability and the reliability of the operation of the hydroelectric generating set are also important. However, in the operation of a hydropower station unit, particularly an axial-flow propeller type water turbine generator unit, the rubbing accident between blades and a runner chamber in the rotation process sometimes occurs in domestic hydropower stations. Once the scratch occurs, the problems of damage to the blade and the operating mechanism, falling off of the metal lining of the runner chamber and the like are caused.
Therefore, in order to ensure that the blade and the runner chamber are not scratched in the operation of the unit, the clearance between the blades of the water turbine and the runner chamber needs to be ensured within a reasonable range. According to the analysis of the reasons of accidents, if a scratch accident occurs in the rotation process of the unit, the slight scratch generally occurs at the place with the minimum local gap, then the scratch part is damaged and protruded, the scratch area is enlarged, and finally equipment is seriously damaged.
Therefore, when the unit is overhauled, a point with the minimum local gap in the rotation process of the unit is found, and then the gap is increased by adjusting and grinding, so that the method is one of key factors for preventing accidents. The traditional maintenance process is carried out in a static state of the runner, and 12-point gaps are measured manually, so that the full range of the blade and the runner chamber cannot be covered. It is even impossible to find the point where the local gap is minimum. Because the clearance measurement uses the feeler gauge to measure the accuracy and can not reach the technological requirement, after the single-point static measurement handling frame finishes, can not describe the clearance change condition of a rotation week. Therefore, after the installation of the rotating wheel operating mechanism is completed, whether the field operation condition is met or not cannot be accurately checked. Particularly, after the capacity increasing transformation of the rotating wheel, the structures of the rotating wheel blade, the operating frame, the rotating arm, the lug handle and the like are greatly changed, a new set of maintenance process is needed to ensure the safety of field construction, and particularly, the problem of uneven measurement of the gap measurement part of the rotating wheel chamber can cause that the blade rubs the lining of the rotating wheel chamber after the unit runs, so that the lining is damaged, and the blade is broken, and the like, which causes serious potential safety hazards in production.
Disclosure of Invention
In view of the above, the present invention provides a wireless transmission system for measuring the gap between the runner chambers of a hydroelectric generating set, which accurately measures the fit relationship between the overall dimension of the gap between the runners and the runner chambers, and checks the operational installation and the overall quality of the runners.
The invention is realized by adopting the following scheme: a wireless transmission system for measuring the gap of a runner chamber of a hydroelectric generating set comprises a displacement sensor, an angle sensor, an AD acquisition module, a first wireless communication module, a second wireless communication module and a mobile terminal; the displacement sensor, the angle sensor and the first wireless communication module are all connected with the AD acquisition module; the first wireless communication module is in communication connection with the second wireless communication module; the second wireless communication module is in communication connection with the mobile terminal.
Further, the displacement sensor adopts a KD2306 high-performance eddy current displacement sensor.
Further, the angle sensor adopts a KD2446 eddy current rotating speed sensor.
Further, the first wireless communication module and the second wireless communication module both adopt a WSN wireless sensor based on a ZigBee protocol.
Further, the invention provides a working method of the wireless transmission system based on the turbine chamber clearance measurement of the hydroelectric generating set, wherein the displacement sensor and the angle sensor respectively measure displacement and angle data of a turbine blade and a turbine chamber, and transmit the displacement and angle data to the AD acquisition module; and the AD acquisition module transmits displacement and angle data to the mobile terminal through the first wireless communication module and the second wireless communication module, so that the mobile terminal can realize the data processing optimization of center positioning and gap measurement of the runner chamber, and finally, the auxiliary decision function of the central adjustment of the unit can be completed.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention firstly applies the wireless measurement technology and uses the special measurement sensor to realize the real-time high-precision measurement of the clearance of the runner chamber in the rotating process of the blade during the maintenance of the unit.
In the process of overhauling and turning a machine set, the gap in the rotating process of the blade cannot be measured by the traditional mechanical feeler gauge. In the rotating process, the clearance between the blade and the runner chamber is changed constantly, the traditional feeler gauge is in physical contact, the measuring time is long, the precision is low, and dynamic measurement cannot be performed. The invention can measure the clearance between the blade and the runner chamber in the rotating process of the unit in the turning stage. And continuous measurement is realized, and the measurement precision is higher.
(2) The invention provides a WSN wireless sensor network technology based on a ZigBee protocol, which solves the problem of cable winding of a sensor in the rotation process of a unit.
Detailed Description
The present invention will be further described with reference to the following examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment provides a wireless transmission system for measuring the gap of a runner chamber of a hydroelectric generating set, which comprises a displacement sensor, an angle sensor, an AD acquisition module, a first wireless communication module, a second wireless communication module and a mobile terminal; the displacement sensor, the angle sensor and the first wireless communication module are all connected with the AD acquisition module; the first wireless communication module is in communication connection with the second wireless communication module; the second wireless communication module is in communication connection with the mobile terminal.
In the embodiment, the displacement sensor adopts a KD2306 high-performance eddy current displacement sensor.
In the embodiment, the angle sensor adopts a KD2446 eddy current rotating speed sensor.
In this embodiment, the first wireless communication module and the second wireless communication module both use a WSN wireless sensor based on a ZigBee protocol.
Preferably, the embodiment provides a working method of a wireless transmission system based on a turbine chamber clearance measurement of a hydro-generator set, wherein the displacement sensor and the angle sensor respectively measure displacement and angle data of a turbine blade and the turbine chamber, and transmit the displacement and angle data to the AD acquisition module; and the AD acquisition module transmits displacement and angle data to the mobile terminal through the first wireless communication module and the second wireless communication module, so that the mobile terminal can realize the data processing optimization of center positioning and gap measurement of the runner chamber, and finally, the auxiliary decision function of the central adjustment of the unit can be completed.
Preferably, in this embodiment, the mobile terminal is loaded with a wheelhouse gap measurement software, so as to realize data processing optimization of wheelhouse center positioning and gap measurement, and finally complete an auxiliary decision function of unit center adjustment. The offset of the center of the fixed part of the unit and the center of the rotating part of the unit and the uniformity of the clearance between the blades and the rotating wheel chamber are critical to the later operation of the unit, and the measuring precision is improved, the central position of the unit can be positioned, the center adjustment of the unit is optimized, and the auxiliary decision function of the center adjustment of the unit is realized through the clearance measuring software of the rotating wheel chamber. The later stable operation of unit is effectively ensured.
Preferably, the embodiment provides a WSN wireless sensor network technology based on a ZigBee protocol, and solves the problem of cable winding of the sensor in the rotation process of the unit.
The sensor nodes are composed of a processor, a memory, a receiver, a sensing unit and a battery, so that the sensor nodes have sensing, calculating and communication capabilities. The problems of data transmission and power supply of the wireless sensor are solved through design, and finally the problem of cable winding is effectively solved.
Preferably, in this embodiment, the AD acquisition module and the first wireless communication module adopt a serial communication mode, the first communication module and the second communication module adopt wireless communication, and the second communication module communicates with the mobile terminal through a USB serial port.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. The utility model provides a hydroelectric set runner room clearance measures wireless transmission system which characterized in that: the device comprises a displacement sensor, an angle sensor, an AD acquisition module, a first wireless communication module, a second wireless communication module and a mobile terminal; the displacement sensor, the angle sensor and the first wireless communication module are all connected with the AD acquisition module; the first wireless communication module is in communication connection with the second wireless communication module; the second wireless communication module is in communication connection with the mobile terminal.
2. The wireless transmission system for measuring the gap of the runner chamber of the hydroelectric generating set according to claim 1, wherein: the displacement sensor adopts a KD2306 high-performance eddy current displacement sensor.
3. The wireless transmission system for measuring the gap of the runner chamber of the hydroelectric generating set according to claim 1, wherein: the angle sensor adopts a KD2446 eddy current rotating speed sensor.
4. The wireless transmission system for measuring the gap of the runner chamber of the hydroelectric generating set according to claim 1, wherein: the first wireless communication module and the second wireless communication module are both provided with a WSN wireless sensor based on a ZigBee protocol.
5. An operating method of a wireless transmission system for measuring the gap of a runner chamber of a hydroelectric generating set according to any one of claims 1 to 3, which is characterized in that: the displacement sensor and the angle sensor respectively measure displacement and angle data of the water turbine blade and the runner chamber and transmit the displacement and angle data to the AD acquisition module; and the AD acquisition module transmits displacement and angle data to the mobile terminal through the first wireless communication module and the second wireless communication module, so that the mobile terminal can realize the data processing optimization of center positioning and gap measurement of the runner chamber, and finally, the auxiliary decision function of the central adjustment of the unit can be completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228657.2A CN110953979A (en) | 2019-12-04 | 2019-12-04 | Wireless transmission system for measuring gap of runner chamber of hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228657.2A CN110953979A (en) | 2019-12-04 | 2019-12-04 | Wireless transmission system for measuring gap of runner chamber of hydroelectric generating set |
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| CN110953979A true CN110953979A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911228657.2A Pending CN110953979A (en) | 2019-12-04 | 2019-12-04 | Wireless transmission system for measuring gap of runner chamber of hydroelectric generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525089A (en) * | 2020-12-25 | 2021-03-19 | 国网福建省电力有限公司 | Method for measuring axis of hydroelectric generating set |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043186A (en) * | 1988-11-30 | 1990-06-20 | 西屋电气公司 | Monitor unit with automatic MEASUREMENT OF STEAM turbine blade banding clearance |
| CN103207234A (en) * | 2012-01-16 | 2013-07-17 | 通用电气公司 | Turbomachine blade monitoring system |
| US20150090017A1 (en) * | 2013-10-02 | 2015-04-02 | Mahmood K. Silieti | Turbine blade-mounted sensor fixture for tip gap measurement |
| US20160363433A1 (en) * | 2015-06-11 | 2016-12-15 | Tokyo Electron Limited | Sensor chip for electrostatic capacitance measurement and measuring device having the same |
| CN110422198A (en) * | 2019-07-12 | 2019-11-08 | 大连理工大学 | Tongue is longitudinally creeped and closely connected gap integration real-time measurement apparatus |
-
2019
- 2019-12-04 CN CN201911228657.2A patent/CN110953979A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043186A (en) * | 1988-11-30 | 1990-06-20 | 西屋电气公司 | Monitor unit with automatic MEASUREMENT OF STEAM turbine blade banding clearance |
| CN103207234A (en) * | 2012-01-16 | 2013-07-17 | 通用电气公司 | Turbomachine blade monitoring system |
| US20150090017A1 (en) * | 2013-10-02 | 2015-04-02 | Mahmood K. Silieti | Turbine blade-mounted sensor fixture for tip gap measurement |
| US20160363433A1 (en) * | 2015-06-11 | 2016-12-15 | Tokyo Electron Limited | Sensor chip for electrostatic capacitance measurement and measuring device having the same |
| CN110422198A (en) * | 2019-07-12 | 2019-11-08 | 大连理工大学 | Tongue is longitudinally creeped and closely connected gap integration real-time measurement apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525089A (en) * | 2020-12-25 | 2021-03-19 | 国网福建省电力有限公司 | Method for measuring axis of hydroelectric generating set |
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Application publication date: 20200403 |