CN110579587A - On-line monitoring system for lubricating oil quality in steam turbine - Google Patents
On-line monitoring system for lubricating oil quality in steam turbine Download PDFInfo
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- CN110579587A CN110579587A CN201810588598.9A CN201810588598A CN110579587A CN 110579587 A CN110579587 A CN 110579587A CN 201810588598 A CN201810588598 A CN 201810588598A CN 110579587 A CN110579587 A CN 110579587A
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- steam turbine
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 65
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 53
- 239000003921 oil Substances 0.000 claims abstract description 146
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 21
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000012806 monitoring device Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/30—Oils, i.e. hydrocarbon liquids for lubricating properties
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Control Of Turbines (AREA)
Abstract
the invention discloses an on-line monitoring system for the quality of lubricating oil in a steam turbine, which comprises: lubricating oil pipeline on the steam turbine still includes: the lubricating oil pipeline is connected with the real-time oil analyzer through the monitoring loop, and the real-time oil analyzer is connected with the monitoring unit through a cable; the monitoring circuit comprises: a sampling pipeline, an oil inlet pipeline, an oil outlet pipeline and an oil return pipeline; the monitoring unit includes: the monitoring host computer and the monitoring server are electrically connected with the monitoring host computer through bidirectional signals; the real-time oil analyzer comprises: the device comprises a single chip microcomputer, a sensor signal input module, a switching value signal output module, a communication module, a display module and a power supply module. The invention ensures the real-time stability of the lubricating oil in the steam turbine, thereby improving the safety of the whole operation of the unit.
Description
Technical Field
The invention relates to monitoring of turbine lubricating oil, in particular to an online monitoring system for the quality of the lubricating oil in a turbine.
Background
The lubricating oil flows through the turbine equipment and flows through the moving central parts, the lubricating oil is degraded and aged continuously, and simultaneously, abrasion particles, scraps, leakage substances and the like of all the parts are carried, so that relevant information about the oil and the mechanical state of the turbine equipment can be obtained from the using state or the quality of the lubricating oil, and the relevant information can be reflected in various index changes of the oil as long as the equipment has serious abnormal conditions. Therefore, the lubricating oil needs to be periodically tested and analyzed according to the requirements of the chemical supervision and management standard and the implementation rules of the chemical supervision technology.
At present, the lubricating oil of the steam turbine is mainly subjected to oil quality supervision in a laboratory manual regular off-line testing mode, the items such as moisture, granularity, acid value and the like are regularly detected, and the degradation of the lubricating oil and the abnormal operation of equipment are timely discovered. However, the internationally specified oil quality detection period is long, the detection period of the water content, the granularity and the acid value is three months, the detection in the last quarter is generally qualified, the detection in the next quarter exceeds the standard, the time sequence for finding the standard exceeding of the oil product is relatively late, and when the oil liquid is detected to be abnormal, the standard exceeding is probably actually carried out for a long time, so that the loss of the steam turbine is already formed. Moreover, for the detection of the granularity, errors are superimposed due to particles existing in laboratory air, a sampling bottle in the sampling process, air, sampling operation and ultrasonic oscillation. Therefore, improvements are needed in the detection of oil quality in a turbine.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an online monitoring system for the oil quality of lubricating oil in a steam turbine, which ensures the real-time stability of the lubricating oil in the steam turbine and improves the overall operation safety of a unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
an on-line monitoring system for the quality of lubricating oil in a steam turbine, comprising: lubricating oil pipeline on the steam turbine still includes: the lubricating oil pipeline is connected with the real-time oil analyzer through the monitoring loop, and the real-time oil analyzer is connected with the monitoring unit through a cable;
The monitoring circuit comprises: the device comprises a sampling pipeline, an oil inlet pipeline, an oil outlet pipeline and an oil return pipeline, wherein one end of the sampling pipeline is communicated with a lubricating oil pipeline, the other end of the sampling pipeline is communicated with one end of the oil inlet pipeline, the other end of the oil inlet pipeline is communicated with an upper liquid inlet of a real-time oil analyzer, an upper liquid outlet of the real-time oil analyzer is communicated with one end of the oil outlet pipeline, the other end of the oil outlet pipeline is communicated with one end of the oil return pipeline, and the other end of the oil return pipeline is also communicated with the lubricating oil pipeline;
The monitoring unit includes: the monitoring host computer and the monitoring server are electrically connected with the monitoring host computer through bidirectional signals;
the real-time oil analyzer comprises: the oil quality monitoring device comprises a single chip microcomputer, a sensor signal input module, a switching value signal output module, a communication module, a display module and a power supply module, wherein the sensor is used for monitoring the oil quality of lubricating oil and transmitting an oil quality parameter signal to the sensor signal input module, the switching value signal output module and the display module are respectively electrically connected with the signal of the single chip microcomputer, the communication module is electrically connected with the single chip microcomputer for bidirectional signals, and the power supply module provides a working power supply for a real-time oil analyzer.
The sampling pipeline is a phi 14 sampling pipeline, and the oil inlet pipeline is a phi 6 oil inlet pipeline.
the sampling pipeline is communicated with the oil inlet pipeline through a reducing joint.
the oil return pipeline is a phi 14 sampling pipeline, and the oil outlet pipeline is a phi 6 oil inlet pipeline.
The oil outlet pipeline is communicated with the oil return pipeline through a reducing joint.
The sampling pipeline is provided with a pressure reducing valve, the oil inlet pipeline is provided with an oil inlet valve, the oil outlet pipeline is provided with an oil outlet valve, and the oil return pipeline is provided with an oil return valve.
The oil inlet pipeline and the oil outlet pipeline are communicated through an oil passage, and an oil valve is arranged on the oil passage.
The real-time oil analyzer transmits the acquired information to the monitoring host computer through the RS-485 cable and the data converter.
The communication module comprises: RS-485 communication module, CAN communication module and ethernet communication module.
the power supply module is connected with an external distribution box.
in the above technical scheme, the on-line monitoring system for the lubricating oil quality in the steam turbine provided by the invention also has the following beneficial effects:
1) The online monitoring system has the advantages of simple structure, convenient realization and capability of carrying out real-time online detection on the lubricating oil in the steam turbine equipment;
2) The online monitoring system can realize online synchronous acquisition of parameters such as moisture, granularity and acid value of the lubricating oil according to a set period and upload the parameters to a monitoring host computer, and can also send an alarm signal when the quality of the lubricating oil does not meet the standard;
3) The online monitoring system effectively improves the maintenance management level of the steam turbine, improves the safe and reliable operation capability of the steam turbine, and ensures the safe and reliable operation of steam turbine equipment.
Drawings
FIG. 1 is a schematic diagram of the online monitoring system of the present invention;
FIG. 2 is a structural frame diagram of a real-time oil analyzer of the present invention;
FIG. 3 is a flow chart of the operation of the online monitoring system of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
referring to fig. 1 to fig. 2, an on-line monitoring system for oil quality of lubricating oil in a steam turbine according to the present invention includes: lubricating oil pipeline 1 on the steam turbine, this on-line monitoring system still includes: monitoring return circuit 2, real-time fluid analysis appearance 3 and monitoring unit 4, lubricating oil pipeline 1 is connected with real-time fluid analysis appearance 3 through monitoring return circuit 2, and real-time fluid analysis appearance 3 is connected with monitoring unit 4 through cable 5, introduces the oil appearance to real-time fluid analysis appearance 3 and detects on original lubricating oil pipeline 1, and the oil appearance after detecting can return to lubricating oil pipeline 1 again.
Preferably, the monitoring circuit 2 includes: the sampling device comprises a sampling pipeline 201, an oil inlet pipeline 202, an oil outlet pipeline 203 and an oil return pipeline 204, wherein the sampling pipeline 201 is a phi 14 sampling pipeline, the oil return pipeline 204 is a phi 14 sampling pipeline, the oil inlet pipeline 202 is a phi 6 oil inlet pipeline, and the oil outlet pipeline 203 is a phi 6 oil inlet pipeline.
Communicating one end of a sampling pipeline 201 with a lubricating oil pipeline 1, communicating the other end of the sampling pipeline 201 with one end of an oil inlet pipeline 202 through a reducer union, communicating the other end of the oil inlet pipeline 202 with an upper liquid inlet of a real-time oil analyzer 3, communicating a liquid outlet of the real-time oil analyzer 3 with one end of an oil outlet pipeline 203, communicating the other end of the oil outlet pipeline 203 with one end of an oil return pipeline 204 through the reducer union, communicating the other end of the oil return pipeline 204 with the lubricating oil pipeline 1, enabling lubricating oil to flow from the lubricating oil pipeline 1 to the real-time oil analyzer 3 through the sampling pipeline 201 and the oil inlet pipeline 202 to detect the oil quality, and enabling a sample of oil to flow back into the lubricating oil pipeline 1 through the oil outlet pipeline 203 and the oil return pipeline 204 after the oil.
Preferably, the oil inlet pipeline 202 and the oil outlet pipeline 203 are communicated through an oil passage pipeline 205, an oil passage valve 206 is arranged on the oil passage pipeline 205, and the oil passage pipeline 205 is used as a backup in case of emergency. The sampling pipeline 201 is provided with a pressure reducing valve 207, when oil quality is detected, the online pressure is less than 0.6Mpa, the oil inlet pipeline 202 is provided with an oil inlet valve 208, the oil outlet pipeline 203 is provided with an oil outlet valve 209, the oil return pipeline 204 is provided with an oil return valve 210, and when the real-time oil analyzer 3 does not perform detection work, the pressure reducing valve 207, the oil inlet valve 208, the oil outlet valve 209 and the oil return valve 210 are all in a closed state.
Preferably, the real-time oil analyzer 3 includes: the sensor comprises a single chip microcomputer 301, a sensor 302, a sensor signal input module 303, a switching value signal input module 304, a switching value signal output module 305, a communication module 306, a display module 307 and a power supply module 308, wherein the sensor signal input module 303, the switching value signal input module 304, the switching value signal output module 305 and the display module 307 are respectively in signal electrical connection with the single chip microcomputer 301, and the communication module 306 is in bidirectional signal electrical connection with the single chip microcomputer 301.
Sensor signal input module 303 is used for gathering and transmitting the output signal of items such as moisture, granularity, acid number that sensor 302 monitored lubricating oil to singlechip 301, switching value signal input module 304 is used for receiving and transmitting switching signal to singlechip 301, switching value signal output module 305 is used for receiving the instruction signal of singlechip 301 output and output switching signal volume, display module 307 chooses liquid crystal display for use, power module 308 provides working power supply for real-time oil analysis appearance 3, power module 308 links to each other with outside block terminal 6.
Preferably, the monitoring unit 4 includes: the monitoring host computer 401 and the monitoring server 402 which is electrically connected with the monitoring host computer 401 through bidirectional signals are used for realizing the storage of the detection data and the judgment of the data, and comparing the data with the set standard value, and if the data are out of tolerance, an abnormal warning can be sent out.
Preferably, the real-time oil analyzer 3 transmits the collected information to the monitoring host computer 401 through an RS-485 cable and a data converter.
Preferably, the communication module 306 includes: RS-485 communication module 3061, CAN communication module 3062 and Ethernet communication module 3062, multichannel and external communication.
As shown in fig. 3, when the on-line monitoring system of the present invention works, the real-time oil analyzer 3 is set to detect oil once every 6 minutes, the valve in the monitoring loop 2 is opened, an oil sample of lubricating oil is introduced into the real-time oil analyzer 3, the sensor 302 is used to detect six parameters of viscosity, density, dielectric constant, temperature, granularity, water content, etc. of the oil, and the parameters are transmitted to the sensor signal input module 303, the sensor signal input module 303 acquires the parameter signal and transmits the parameter signal to the single chip microcomputer 301, the single chip microcomputer 301 transmits the processed data to the monitoring host computer 401 through the communication module 306, the monitoring host computer 401 is preset with the alarm threshold value of each parameter, compares each received parameter with the alarm threshold value, if normal, only displays each parameter data, if out of tolerance, the alarm signal is transmitted to the real-time oil analyzer 3, causing it to sound an alarm.
In conclusion, the invention can monitor six parameters of viscosity, density, dielectric constant, temperature, granularity, water content and the like of the oil product in the pipeline on line in real time, the detection is carried out once every 6 minutes (the interval time can be set according to actual requirements), the detection frequency is increased rapidly, a large amount of data can more clearly and more visually reflect the real state of the oil product, the time point of the exceeding standard of the oil product can be more accurately grasped, and corresponding measures can be taken more timely for maintenance.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. An on-line monitoring system for the quality of lubricating oil in a steam turbine, comprising: lubricating oil pipeline on steam turbine, its characterized in that still includes: the lubricating oil pipeline is connected with the real-time oil analyzer through the monitoring loop, and the real-time oil analyzer is connected with the monitoring unit through a cable;
The monitoring circuit comprises: the device comprises a sampling pipeline, an oil inlet pipeline, an oil outlet pipeline and an oil return pipeline, wherein one end of the sampling pipeline is communicated with a lubricating oil pipeline, the other end of the sampling pipeline is communicated with one end of the oil inlet pipeline, the other end of the oil inlet pipeline is communicated with an upper liquid inlet of a real-time oil analyzer, an upper liquid outlet of the real-time oil analyzer is communicated with one end of the oil outlet pipeline, the other end of the oil outlet pipeline is communicated with one end of the oil return pipeline, and the other end of the oil return pipeline is also communicated with the lubricating oil pipeline;
The monitoring unit includes: the monitoring host computer and the monitoring server are electrically connected with the monitoring host computer through bidirectional signals;
The real-time oil analyzer comprises: the oil quality monitoring device comprises a single chip microcomputer, a sensor signal input module, a switching value signal output module, a communication module, a display module and a power supply module, wherein the sensor is used for monitoring the oil quality of lubricating oil and transmitting an oil quality parameter signal to the sensor signal input module, the switching value signal output module and the display module are respectively electrically connected with the signal of the single chip microcomputer, the communication module is electrically connected with the single chip microcomputer for bidirectional signals, and the power supply module provides a working power supply for a real-time oil analyzer.
2. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the sampling pipeline is a phi 14 sampling pipeline, and the oil inlet pipeline is a phi 6 oil inlet pipeline.
3. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 2, wherein: the sampling pipeline is communicated with the oil inlet pipeline through a reducing joint.
4. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the oil return pipeline is a phi 14 sampling pipeline, and the oil outlet pipeline is a phi 6 oil inlet pipeline.
5. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 4, wherein: the oil outlet pipeline is communicated with the oil return pipeline through a reducing joint.
6. the system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the sampling pipeline is provided with a pressure reducing valve, the oil inlet pipeline is provided with an oil inlet valve, the oil outlet pipeline is provided with an oil outlet valve, and the oil return pipeline is provided with an oil return valve.
7. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the oil inlet pipeline and the oil outlet pipeline are communicated through an oil passage, and an oil valve is arranged on the oil passage.
8. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the real-time oil analyzer transmits the acquired information to the monitoring host computer through the RS-485 cable and the data converter.
9. The system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the communication module comprises: RS-485 communication module, CAN communication module and ethernet communication module.
10. the system for on-line monitoring of the quality of lubricating oil in a steam turbine of claim 1, wherein: the power supply module is connected with an external distribution box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810588598.9A CN110579587A (en) | 2018-06-08 | 2018-06-08 | On-line monitoring system for lubricating oil quality in steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810588598.9A CN110579587A (en) | 2018-06-08 | 2018-06-08 | On-line monitoring system for lubricating oil quality in steam turbine |
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| CN110579587A true CN110579587A (en) | 2019-12-17 |
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| CN201810588598.9A Pending CN110579587A (en) | 2018-06-08 | 2018-06-08 | On-line monitoring system for lubricating oil quality in steam turbine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269344A (en) * | 2020-11-10 | 2021-01-26 | 崇左南方水泥有限公司 | Multi-parameter intelligent integrated monitoring system for cement mill |
| CN113720999A (en) * | 2020-05-20 | 2021-11-30 | 上海圣克赛斯液压股份有限公司 | Lubricating system oil cleanliness on-line monitoring device and wind driven generator |
| CN113941576A (en) * | 2021-09-29 | 2022-01-18 | 中广核核电运营有限公司 | Method for flushing turbine lubricating oil system |
| CN114857130A (en) * | 2022-04-28 | 2022-08-05 | 南方电网科学研究院有限责任公司 | Hydraulic oil online monitoring system, method and equipment for electric power overhead working truck |
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| CN103837666A (en) * | 2014-02-25 | 2014-06-04 | 天地（常州）自动化股份有限公司 | Online lubrication oil state monitoring system of mine device and monitoring method of system |
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| CN208297505U (en) * | 2018-06-08 | 2018-12-28 | 上海漕泾热电有限责任公司 | A kind of online monitoring system for oil quality of lubricant in steam turbine |
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2018
- 2018-06-08 CN CN201810588598.9A patent/CN110579587A/en active Pending
Patent Citations (4)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720999A (en) * | 2020-05-20 | 2021-11-30 | 上海圣克赛斯液压股份有限公司 | Lubricating system oil cleanliness on-line monitoring device and wind driven generator |
| CN112269344A (en) * | 2020-11-10 | 2021-01-26 | 崇左南方水泥有限公司 | Multi-parameter intelligent integrated monitoring system for cement mill |
| CN112269344B (en) * | 2020-11-10 | 2021-05-25 | 崇左南方水泥有限公司 | Multi-parameter intelligent integrated monitoring system for cement mill |
| CN113941576A (en) * | 2021-09-29 | 2022-01-18 | 中广核核电运营有限公司 | Method for flushing turbine lubricating oil system |
| CN114857130A (en) * | 2022-04-28 | 2022-08-05 | 南方电网科学研究院有限责任公司 | Hydraulic oil online monitoring system, method and equipment for electric power overhead working truck |
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