CN114034497A - Steam turbine health state data acquisition device - Google Patents
Steam turbine health state data acquisition device Download PDFInfo
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- CN114034497A CN114034497A CN202111298406.9A CN202111298406A CN114034497A CN 114034497 A CN114034497 A CN 114034497A CN 202111298406 A CN202111298406 A CN 202111298406A CN 114034497 A CN114034497 A CN 114034497A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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Abstract
The invention discloses a steam turbine health state data acquisition device, which comprises a plurality of groups of data acquisition cards and sensors, a DO card, an execution structure and an upper computer; the sensor is arranged on the steam turbine and used for monitoring the physical quantity change of the steam turbine in real time; the output end of the sensor is connected with a data acquisition card; the data connection between the plurality of groups of data acquisition cards and the upper computer is realized through an IO bus, and a decentralized processing unit is arranged on the IO bus and coordinates the IO bus to work orderly; the DO card is connected to the IO bus and controls the steam turbine through the execution mechanism. The sensor types include vibration sensors, shaft displacement sensors, and key/phase frequency acquisition modules. The data acquisition card comprises a sensor signal acquisition circuit, a voltage conversion circuit, a singlechip minimum system, an external CPU board and a data acquisition card upper computer. The comprehensive monitoring of the working process of the steam turbine is realized, and the reliability and the safety of the work of the steam turbine are improved.
Description
Technical Field
The invention belongs to the technical field of steam turbine testing, and particularly relates to a steam turbine health state data acquisition device.
Background
The steam turbine belongs to critical components in a power plant, and has great practical significance for monitoring the health state of the steam turbine in real time and giving early warning in time. The steam turbine health state safety monitoring system can emergently interrupt the steam turbine through the switching value output module when necessary, so that the safety of equipment and power plant personnel is guaranteed, and the service life of the steam turbine is prolonged. The real-time monitoring of the health state of the mechanical equipment of the steam turbine needs a set of accurate and reliable data acquisition device, and the health state of the equipment of the steam turbine can be reflected more completely and truly only by acquiring the running state data of the steam turbine as much as possible. Most of the steam turbine state data acquisition devices on the market at present are complex in structure, high in cost and limited in the steam turbine state data which can be acquired, and the current operation state of the steam turbine cannot be comprehensively reflected. In order to adapt to the development trend of miniaturization and modularization of electronic devices in a factory, the design of the current steam turbine health state data acquisition device needs to be improved, channels are integrated as much as possible, more state information of the steam turbine is acquired at the same time, and the state information is fed back to a monitoring system to perform early warning and emergency interrupt processing in time.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steam turbine health state data acquisition device aiming at the defects of the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a steam turbine health state data acquisition device comprises a plurality of groups of data acquisition cards and sensors, a DO card, an execution structure and an upper computer;
the sensor is arranged on the steam turbine and used for monitoring the physical quantity change of the steam turbine in real time;
the output end of the sensor is connected with a data acquisition card;
the data connection between the multiple groups of data acquisition cards and an upper computer is realized through an IO bus, a decentralized processing unit is arranged on the IO bus, and the decentralized processing unit coordinates the IO bus to work orderly;
the DO card is connected to the IO bus and controls the steam turbine through an execution mechanism.
Preferably, the sensor categories include vibration sensors, shaft displacement sensors and key/phase frequency acquisition modules.
Preferably, the data acquisition card comprises a sensor signal acquisition circuit, a voltage conversion circuit, a singlechip minimum system, an external CPU board and a data acquisition card upper computer; the sensor signal acquisition circuit comprises an alternating current small signal acquisition circuit, an alternating current large signal acquisition circuit and a shaft displacement signal acquisition circuit, the alternating current small signal acquisition circuit is connected with the vibration sensor, the alternating current large signal acquisition circuit is connected with the key/phase frequency acquisition module, and the shaft displacement signal acquisition circuit is connected with the shaft displacement sensor.
Preferably, the alternating current small signal acquisition circuit inputs signals output by the vibration sensor into the photoelectric solid-state relay signal gating module after filtering and instrument operational amplification, then inputs the signals into the precise ADC module through the effective value conversion circuit, converts the signals into digital signals, and inputs the digital signals into the minimum system of the single chip microcomputer through magnetic coupling isolation.
Preferably, the alternating current large signal acquisition circuit inputs signals output by the key/phase frequency acquisition module into the photoelectric solid-state relay signal gating module after filtering and instrument operational amplification, converts the signals into frequency signals through the high-speed comparator circuit, and inputs the frequency signals into the minimum system of the single chip microcomputer through optical coupling isolation.
Preferably, the shaft displacement signal acquisition circuit attenuates signals output by the shaft displacement sensor, and then the signals are input into the precise ADC module through the voltage following and reversing circuit, and the precise ADC module converts the signals into digital signals and then inputs the digital signals into the minimum system of the single chip microcomputer after magnetic coupling isolation.
Preferably, the single-chip microcomputer minimum system is communicated with a data acquisition card upper computer through an RS485 bus, and the sensor signal is displayed on an interface of the data acquisition card upper computer.
Preferably, the single-chip microcomputer minimum system is communicated with an external CPU board through an SPI bus, the external CPU board is used for storing sensor data, and the external CPU board is communicated with a data acquisition card upper computer through a parallel bus to achieve historical data calling and displaying.
Preferably, the upper computer and the decentralized processing unit realize data transmission through an ethernet.
The invention has the following beneficial effects:
after the steam turbine health state data acquisition device is adopted, various parameter indexes in the steam turbine running process can be acquired in real time, the acquisition of a plurality of running state data of the steam turbine is simultaneously integrated to the same device, different signal acquisition channels are switched through the upper machine configuration, the equipment integration degree is greatly improved, the mechanical equipment health state of the steam turbine can be comprehensively monitored, the running state of the equipment is stored and refreshed in real time, the abnormal state of the steam turbine can be found in time, predictive alarm is carried out, the running of the steam turbine is interrupted in an emergency state, the steam turbine can run continuously and stably, the safety of equipment and power plant workers is ensured, the manual inspection and fault shutdown cost is reduced, and the running efficiency of the power plant is improved.
Drawings
FIG. 1 is a schematic diagram of a data acquisition card system of a steam turbine health state data acquisition device according to the present invention.
Fig. 2 is a schematic diagram of the working process of the alternating current small signal acquisition circuit of the steam turbine health state data acquisition device.
FIG. 3 is a schematic diagram of the working process of the AC large signal acquisition circuit of the steam turbine health state data acquisition device of the present invention.
FIG. 4 is a schematic diagram of the working process of the shaft displacement signal acquisition circuit of the steam turbine health state data acquisition device according to the present invention.
FIG. 5 is a schematic diagram of a data acquisition card of the steam turbine health status data acquisition device according to the present invention.
FIG. 6 is a schematic diagram of a system of a steam turbine health data acquisition device according to the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 6, a steam turbine health status data acquisition device comprises a plurality of groups of data acquisition cards and sensors, a DO card, an execution structure and an upper computer;
the sensor is arranged on the steam turbine and used for monitoring the physical quantity change of the steam turbine in real time;
the output end of the sensor is connected with a data acquisition card;
the data connection between the multiple groups of data acquisition cards and an upper computer is realized through an IO bus, a decentralized processing unit is arranged on the IO bus, and the decentralized processing unit coordinates the IO bus to work orderly;
the DO card is connected to the IO bus and controls the steam turbine through an execution mechanism.
In particular, the sensor types include a vibration sensor, a shaft displacement sensor, and a key/phase frequency acquisition module.
Referring to fig. 1, in a specific implementation, the data acquisition card includes a sensor signal acquisition circuit, a voltage conversion circuit, a minimum system of a single chip (preferably STM32 based on Cortex-M3 core), an external CPU board, and an upper computer of the data acquisition card; the sensor signal acquisition circuit comprises an alternating current small signal acquisition circuit, an alternating current large signal acquisition circuit and a shaft displacement signal acquisition circuit, the alternating current small signal acquisition circuit is connected with the vibration sensor, the alternating current large signal acquisition circuit is connected with the key/phase frequency acquisition module, and the shaft displacement signal acquisition circuit is connected with the shaft displacement sensor.
Referring to fig. 2, in specific implementation, the ac small-signal acquisition circuit filters a signal output by the vibration sensor, inputs the signal into the photoelectric solid-state relay signal gating module after the signal is amplified by 32 times by the instrument operational amplifier (instrument operational amplifier selection AD 8226), inputs the signal into the precise ADC module (chip selection 16-bit ADC, not less than 3 channels) by the effective value conversion circuit (effective value conversion chip selection AD8436), and converts the signal into a digital signal, which is input into the minimum system of the single chip microcomputer by the magnetic coupling isolation.
Referring to fig. 3, the alternating current large signal acquisition circuit filters signals output by the key/phase frequency acquisition module, the instrument operational amplifier amplifies externally input-24V pulse key/phase frequency signals by unit gain and then performs amplitude limiting filtering, the filtering cutoff frequency is 0.338Hz and 15.915kHz, the amplitude limiting amplitude is +/-5V, then the signals are input into the photoelectric solid-state relay signal gating module, then the signals are converted into frequency signals by a high-speed comparator circuit (the high-speed comparator adopts a dual-power supply comparator LM393 with the maximum response time of 1.3 us), and the frequency signals are isolated and input into the minimum system of the single chip microcomputer by an optical coupler (the high-speed optical coupler HCPL-181-00D with the CTR of 300-600 is selected).
Referring to fig. 4, in specific implementation, the shaft displacement signal acquisition circuit attenuates a signal output by the shaft displacement sensor, and inputs the signal to the precise ADC module through the voltage following and inverting circuit, and the precise ADC module converts the signal into a digital signal and inputs the digital signal to the minimum system of the single chip microcomputer after magnetic coupling isolation.
In specific implementation, the single-chip microcomputer minimum system is communicated with a data acquisition card upper computer through an RS485 bus, and the sensor signal is displayed on an interface of the data acquisition card upper computer.
During specific implementation, the single chip microcomputer minimum system is communicated with an external CPU board through an SPI bus, the external CPU board is used for storing sensor data, and the external CPU board is communicated with a data acquisition card upper computer through a parallel bus to achieve historical data calling and displaying.
Referring to fig. 5, when the data acquisition card starts to work, the system is initialized to start receiving external sensor data, and when the external sensor data is received and sampling processing is finished, the data is output to an external CPU and an upper computer of the data acquisition card, so that data storage and real-time display are realized.
In specific implementation, the upper computer and the decentralized processing unit realize data transmission through the Ethernet.
The steam turbine health state data acquisition device can acquire various parameter indexes in the steam turbine operation process in real time, simultaneously acquire a plurality of operation state data of the steam turbine and integrate the data into the same device, and different signal acquisition channels are switched by an upper machine dynamically, so that the equipment integration degree is greatly improved, the mechanical equipment health state of the steam turbine can be comprehensively monitored, the equipment operation state is stored and refreshed in real time, the abnormal state of the steam turbine can be timely found, predictive alarm is carried out, the steam turbine operation is interrupted in an emergency state, the steam turbine can continuously and stably operate, the safety of equipment and power plant workers is ensured, the manual inspection and fault shutdown cost is reduced, and the power plant operation efficiency is improved.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. The utility model provides a steam turbine health status data acquisition device which characterized in that: the device comprises a plurality of groups of data acquisition cards and sensors, a DO card, an execution structure and an upper computer;
the sensor is arranged on the steam turbine and used for monitoring the physical quantity change of the steam turbine in real time;
the output end of the sensor is connected with a data acquisition card;
the data connection between the multiple groups of data acquisition cards and an upper computer is realized through an IO bus, a decentralized processing unit is arranged on the IO bus, and the decentralized processing unit coordinates the IO bus to work orderly;
the DO card is connected to the IO bus and controls the steam turbine through an execution mechanism.
2. The steam turbine health data acquisition device of claim 1, wherein: the sensor types include vibration sensors, shaft displacement sensors, and key/phase frequency acquisition modules.
3. The steam turbine health data acquisition device of claim 1, wherein: the data acquisition card comprises a sensor signal acquisition circuit, a voltage conversion circuit, a singlechip minimum system, an external CPU board and a data acquisition card upper computer; the sensor signal acquisition circuit comprises an alternating current small signal acquisition circuit, an alternating current large signal acquisition circuit and a shaft displacement signal acquisition circuit, the alternating current small signal acquisition circuit is connected with the vibration sensor, the alternating current large signal acquisition circuit is connected with the key/phase frequency acquisition module, and the shaft displacement signal acquisition circuit is connected with the shaft displacement sensor.
4. The steam turbine health data acquisition device of claim 3, wherein: the alternating current small signal acquisition circuit inputs signals output by the vibration sensor into the photoelectric solid-state relay signal gating module after filtering and instrument operational amplification, then inputs the signals into the precise ADC module through the effective value conversion circuit, converts the signals into digital signals, and inputs the digital signals into the minimum system of the single chip microcomputer through magnetic coupling isolation.
5. The steam turbine health data acquisition device of claim 3, wherein: the alternating current large signal acquisition circuit inputs signals output by the key/phase frequency acquisition module into the photoelectric solid-state relay signal gating module after filtering and instrument operational amplification, then the signals are converted into frequency signals through the high-speed comparator circuit, and the frequency signals are input into the minimum system of the single chip microcomputer through optical coupling isolation.
6. The steam turbine health data acquisition device of claim 3, wherein: the shaft displacement signal acquisition circuit attenuates signals output by the shaft displacement sensor, and then the signals are input into the precise ADC module through the voltage following and reversing circuit, and the precise ADC module converts the signals into digital signals and then inputs the digital signals into the minimum system of the single chip microcomputer after magnetic coupling isolation.
7. The steam turbine health data acquisition device of claim 3, wherein: the single chip microcomputer minimum system is communicated with a data acquisition card upper computer through an RS485 bus, and the sensor signals are displayed on an interface of the data acquisition card upper computer.
8. The steam turbine health data acquisition device of claim 3, wherein: the single chip microcomputer minimum system is communicated with an external CPU board through an SPI bus, the external CPU board is used for storing sensor data, and the external CPU board is communicated with a data acquisition card upper computer through a parallel bus to achieve historical data calling and displaying.
9. The steam turbine health data acquisition device of claim 1, wherein: and the upper computer and the decentralized processing unit realize data transmission through the Ethernet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111298406.9A CN114034497A (en) | 2021-11-04 | 2021-11-04 | Steam turbine health state data acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111298406.9A CN114034497A (en) | 2021-11-04 | 2021-11-04 | Steam turbine health state data acquisition device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628933A (en) * | 2013-12-02 | 2014-03-12 | 成都成发科能动力工程有限公司 | Control method for realizing ETS (emergency trip system) function of small-sized steam turbine set |
| CN105551222A (en) * | 2016-01-28 | 2016-05-04 | 辽宁省交通规划设计院公路养护技术研发中心 | Embedded bridge health monitoring system |
| WO2018113165A1 (en) * | 2016-12-21 | 2018-06-28 | 国网电力科学研究院 | Configurable device for monitoring vibration and swing states of hydraulic turbine set, and data acquisition method |
| CN110908321A (en) * | 2019-12-28 | 2020-03-24 | 哈尔滨汽轮机厂有限责任公司 | Data acquisition device for steam turbine set sensor |
-
2021
- 2021-11-04 CN CN202111298406.9A patent/CN114034497A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628933A (en) * | 2013-12-02 | 2014-03-12 | 成都成发科能动力工程有限公司 | Control method for realizing ETS (emergency trip system) function of small-sized steam turbine set |
| CN105551222A (en) * | 2016-01-28 | 2016-05-04 | 辽宁省交通规划设计院公路养护技术研发中心 | Embedded bridge health monitoring system |
| WO2018113165A1 (en) * | 2016-12-21 | 2018-06-28 | 国网电力科学研究院 | Configurable device for monitoring vibration and swing states of hydraulic turbine set, and data acquisition method |
| CN110908321A (en) * | 2019-12-28 | 2020-03-24 | 哈尔滨汽轮机厂有限责任公司 | Data acquisition device for steam turbine set sensor |
Non-Patent Citations (1)
| Title |
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| 黄洪全等: "一种新的汽轮机保护***监控仪", 《信息与电子工程》, vol. 8, no. 04, pages 480 - 484 * |
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