CN112666339A - Online analysis system and method for lubricating oil of unit oil station - Google Patents
Online analysis system and method for lubricating oil of unit oil station Download PDFInfo
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- 238000004458 analytical method Methods 0.000 title claims abstract description 39
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
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- 238000012544 monitoring process Methods 0.000 claims abstract description 43
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- 235000019198 oils Nutrition 0.000 claims description 133
- 238000005299 abrasion Methods 0.000 claims description 9
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Abstract
The invention relates to a system and a method for on-line analysis of lubricating oil of a unit oil station. The on-line monitoring instrument is provided with a monitoring oil pump, a micro-water sensor, a viscosity three-in-one sensor, a metal abrasive particle sensor, a monitoring controller, a display and an oil pipeline. The on-line analysis method is that the return oil of the lubricating oil of the unit equipment enters the on-line monitor through the lubricating oil return pipeline and the oil inlet pipe, the lubricating oil is introduced by the monitoring oil pump, the lubricating oil is analyzed through the micro-water sensor, the viscosity three-in-one sensor and the metal abrasive particle sensor, and the analyzed lubricating oil flows back to the unit oil station through the oil outlet pipe. The invention adopts the high-viscosity fluid vibration sensing technology, the polymer film capacitance technology and the ferromagnetic abrasive particle sensing technology to monitor the oil change in real time and feed back the quality state of the oil in time, thereby improving the quality measurement precision of the lubricating oil of the unit and the operation stability of the unit.
Description
Technical Field
The invention belongs to the technical field of industrial production analysis and measurement, and relates to an online analysis system and method for lubricating oil of a unit oil station.
Background
Lubrication is an important means for protecting all mechanical equipment, and particularly in the petrochemical industry, the continuous operation of rotating equipment has stricter requirements on lubrication. The lubricating workload of the pump of the oil refining enterprise is large, the range is wide, the daily management and maintenance work are complex, and the cost is higher.
The traditional oil product monitoring method is complex in operation, high in cost, long in monitoring period and incapable of meeting the requirement of real-time performance. The lubricating system can timely and accurately judge the degradation condition of an oil product and diagnose the abnormal working condition of equipment by real-time monitoring, and is an important technical means for equipment state monitoring and fault diagnosis. Therefore, the development of an online oil product oil monitoring system has very important theoretical and practical significance.
The wear particle amount of a lubricating system of the equipment is monitored on line in real time, and the fault state of a mechanical system and the residual life of an oil product are determined according to the wear particle amount. The metal abrasive particle sensor of the monitoring system can set the alarm value of the wear particles according to the use condition and the standard of the oil, and sends out an alarm signal when the wear particles reach the alarm value. The real-time monitoring of the oil change can feed back the quality state and the residual service life of the oil product in use in time. The online detection of the quality and the abrasion condition of the oil products is an important means for monitoring the state of equipment and diagnosing faults.
Disclosure of Invention
The invention aims to provide an on-line analysis system for lubricating oil of a unit oil station, which can monitor the quality change of an oil product in real time, feed back the quality state and the residual life of the oil product in use in time and improve the quality measurement precision of the lubricating oil of the unit and the operation stability of the unit. The invention also aims to provide a method for on-line analysis of the lubricating oil of the unit oil station.
The technical scheme of the invention is as follows: the online analysis system for the lubricating oil of the oil station of the unit comprises at least one oil station of the unit, unit equipment and an oil station auxiliary oil pump, wherein the oil station of the unit is connected to the unit equipment through the oil station auxiliary oil pump. The system is provided with an online monitor, an oil inlet pipe, an oil outlet pipe, an oil inlet valve, an inlet connecting piece, an outlet one-way valve and an outlet connecting piece. The oil receiving disc of the unit equipment is connected to an oil inlet valve through a lubricating oil return pipeline, the outlet of the oil inlet valve is connected to an online monitor through an inlet connecting piece and an oil inlet pipe, and the outlet of the online monitor is connected to a unit oil station through an oil outlet pipe outlet connecting piece and an outlet one-way valve.
The on-line monitoring instrument is provided with a monitoring oil pump, a micro-water sensor, a viscosity three-in-one sensor, a metal abrasive particle sensor, a monitoring controller, a display and an oil pipeline. The monitoring controller is in communication connection with the monitoring oil pump, the micro-water sensor, the viscosity three-in-one sensor, the metal abrasive particle sensor, the monitoring controller and the display. The oil inlet pipe is connected to an oil pipeline through a monitoring oil pump, and the oil pipeline penetrates through the metal abrasive particle sensor, the viscosity three-in-one sensor and the micro-water sensor to be connected to the oil outlet pipe. The display is a full Chinese graphical interface and can display a parameter list, a real-time curve graph, a historical curve graph, historical data, an alarm picture and a report. The unit equipment is a compressor unit, an expander unit, a main fan unit or a pump unit.
The invention relates to a method for on-line analysis of lubricating oil of a unit oil station, wherein the return oil of the lubricating oil of unit equipment enters an on-line monitor through a lubricating oil return pipeline and an oil inlet pipe, the lubricating oil is introduced by a monitoring oil pump, is analyzed through a micro-water sensor, a viscosity three-in-one sensor and a metal abrasive particle sensor, and flows back to the unit oil station through an oil outlet pipe after analysis. The analysis process is as follows:
the method comprises the steps of detecting through a micro-water sensor, analyzing whether trace water in the lubricating oil exceeds the standard or not, and if the trace water exceeds the standard, giving an alarm, otherwise, carrying out the next step;
secondly, detecting by using a viscosity three-in-one sensor, analyzing whether the viscosity value exceeds the standard, and if so, giving an alarm, otherwise, carrying out the next step;
thirdly, detecting through a metal abrasive particle sensor, analyzing whether metal abrasive particles exceed standards, and if the metal abrasive particles exceed the standards, giving an alarm, otherwise, returning to the first step; the on-line analysis process is performed circularly.
The analysis of trace water in the lubricating oil adopts a high molecular film capacitance sensing technology to detect the trace water change in the lubricating oil. The micro-water sensor takes a macromolecule humidity sensing film as a sensitive element and achieves the dynamic balance of water through the processes of dehydration and water absorption. The moisture sensing probe arranged at the front end of the micro water sensor can capture the electrical property change of the oil-water mixture in real time, and the high-precision temperature probe is used for data compensation to obtain the moisture content in the oil.
The three-in-one viscosity sensor is used for analyzing the density, viscosity and dielectric constant of lubricating oil on line, and the three indexes of the density, viscosity and dielectric constant of liquid are automatically detected in real time by adopting a piezoelectric resonance MEMS element and an internal integrated high-precision signal sampling and processing unit. When the lubricating oil is polluted by hydraulic oil due to the oiling error or the sealing damage, the hydraulic oil can be found and alarm in time. The viscosity is dynamic viscosity, and the relationship between the dynamic viscosity and the gravity viscosity is as follows: mu = eta/rho;
wherein: mu: kinematic viscosity, mm2/s = cst;
eta: dynamic viscosity, mpa.s = mPa · s;
ρ: density, g.cm.
The metal abrasive particle sensor adopts an electromagnetic induction principle, monitors metal particles on line and monitors the abrasion state of equipment in real time. Monitoring the abrasive grain size: ferromagnetic particles having a diameter greater than 50 μm; non-ferromagnetic particles having a diameter greater than 200 μm.
The oil on-line analysis system of the unit oil station monitors the viscosity, density, temperature, moisture and abrasion condition of lubricating oil in real time by an on-line monitor consisting of a micro-water sensor, a viscosity three-in-one sensor and a metal abrasive particle sensor and adopting a high-viscosity fluid vibration sensing technology, a high-molecular film capacitance technology and a ferromagnetic abrasive particle sensing technology, predicts the lubrication state of the equipment in advance, gives an alarm in time when a problem occurs, and replaces the oil. Meanwhile, the change of abrasion is tracked, the early failure of the friction pair is found, and the further deterioration of the accident is avoided. The on-line oil analysis method for the unit oil station is controlled by the monitoring controller, automatically operates, is displayed by a full Chinese graphical interface of the display, is matched with an alarm, monitors the change of an oil product in real time, feeds back the quality state and the residual life of the oil product in use in time, and improves the quality measurement precision of the unit lubricating oil and the operation stability of the unit.
Drawings
FIG. 1 is a schematic flow chart of an on-line monitoring system for lubricating oil of a unit oil station of the invention;
FIG. 2 is a schematic structural diagram of an internal sensor for online monitoring of lubricating oil;
FIG. 3 is a schematic flow chart of a lubricating oil on-line monitoring method for a unit oil station;
FIG. 4 is a schematic diagram of the measurement of lubricating oil micro-water;
FIG. 5 is a graph of viscosity analysis;
FIG. 6 is a schematic diagram of metal abrasive particle analysis;
fig. 7 is a graph of metal abrasive particle analysis.
Wherein: 1-oil inlet pipe, 2-oil outlet pipe, 3-oil inlet valve, 4-inlet connecting piece, 5-monitoring oil pump, 6-micro water sensor, 7-viscosity three-in-one sensor, 8-metal abrasive particle sensor, 9-outlet one-way valve, 10-outlet connecting piece, 11-monitoring controller, 12-display, 13-electrical apparatus line inlet, 14-gas source pipeline inlet, 15-online monitor, 16-unit oil station, 17-oil station outlet pipeline, 18-oil station auxiliary oil pump, 19-unit equipment, 20-lubricating oil return pipeline, 21-magnet exciting coil, 22-sensitive coil, 23-system processor and 26-oil pipeline.
Detailed Description
The present invention will be described in detail with reference to the following examples and drawings. The scope of protection of the invention is not limited to the embodiments, and any modification made by those skilled in the art within the scope defined by the claims also falls within the scope of protection of the invention.
The on-line analysis system for the lubricating oil of the oil station of the unit comprises a unit oil station 16, unit equipment 19, an on-line monitor 15 and an oil station auxiliary oil pump 18, wherein the unit equipment is compressor unit equipment, as shown in figure 1. The on-line monitor 15 is provided with an oil inlet pipe 1, an oil outlet pipe 2, an oil inlet valve 3, an inlet connecting piece 4, an outlet one-way valve 9 and an outlet connecting piece 10. The oil station of the unit is connected to unit equipment 19 through an oil station auxiliary oil pump 18 through an oil station outlet pipeline 17, an oil receiving disc of the unit equipment is connected to an oil inlet valve 3 through a lubricating oil return pipeline 20, and an outlet of the oil inlet valve 3 is connected to an online monitor 15 through an inlet connecting piece 4 and an oil inlet pipe 1. The outlet of the on-line monitor is connected to a unit oil station 16 through an outlet connecting piece 10 of the oil outlet pipe 2 and an outlet one-way valve 9. A bypass is arranged between the lubricating oil return line 20 and the unit oil station 16, and a valve is arranged on the bypass. As shown in fig. 2, the on-line monitor 15 is provided with a monitoring oil pump 5, a micro-water sensor 6, a three-in-one viscosity sensor 7, a metal abrasive particle sensor 8, a monitoring controller 11, a display 12 and an oil pipeline 26. The model of the micro-water sensor 6 is YFW-2A, the model of the viscosity three-in-one sensor 7 is YFV-2, and the model of the metal abrasive particle sensor 8 is YPM-08. The monitoring controller 11 is in communication connection with the monitoring oil pump 5, the micro-water sensor, the viscosity three-in-one sensor, the metal abrasive particle sensor, the monitoring controller and the display. The monitoring controller receives the detection data of the micro-water sensor, the viscosity three-in-one sensor and the metal abrasive particle sensor, transmits the detection data to the display after data processing, and remotely transmits the detection data to a DCS system of a production device control room through an RS485/RS232 interface to provide data reference for operation and technical personnel. The oil inlet pipe is connected to an oil pipeline through a monitoring oil pump, and the oil pipeline penetrates through the micro-water sensor, the viscosity three-in-one sensor and the metal abrasive particle sensor to be connected to the oil outlet pipe. The on-line monitor 15 is arranged in the positive pressure explosion-proof cabinet, the display 12 is arranged on the front surface of the positive pressure explosion-proof cabinet, and the lower part of the positive pressure explosion-proof cabinet is provided with an electric appliance line inlet 13 and an air source line inlet 14. The display is a full Chinese graphical interface and can display a parameter list, a real-time curve graph, a historical curve graph, historical data, an alarm picture and a report.
The method for on-line analysis of the lubricating oil of the oil station of the unit comprises the steps that the return oil of the lubricating oil of the unit equipment enters an on-line monitor 15 through a lubricating oil return pipeline 20 and an oil inlet pipe 1, the lubricating oil is introduced by a monitoring oil pump 5 and analyzed through a micro-water sensor 6 and a viscosity three-in-one sensor 7 metal abrasive particle sensor 8, and the analyzed lubricating oil flows back to the oil station 16 of the unit through an oil outlet pipe 2. As shown in fig. 3, the analysis process of the line monitor 15 is:
the method comprises the steps of detecting through a micro-water sensor 6, analyzing whether trace water in the lubricating oil exceeds the standard or not, and if the trace water exceeds the standard, giving an alarm, otherwise, performing the next step;
secondly, detecting by a three-in-one viscosity sensor 7, analyzing whether the viscosity value exceeds the standard, and if so, giving an alarm, otherwise, carrying out the next step;
thirdly, detecting through the metal abrasive particle sensor 8, analyzing whether the metal abrasive particles exceed the standard or not, if yes, giving an alarm, and otherwise, returning to the first step; the on-line analysis process is performed circularly.
The purpose of measuring the trace water in the lubricating oil is to timely find and avoid the formation of condensed water when the gear box is polluted by the trace water due to respiration. The analysis of trace water in the lubricating oil adopts a high molecular film capacitance sensing technology to detect the trace water change in the lubricating oil. The micro-water sensor 6 takes a high-molecular humidity sensing film as a sensitive element, and achieves the dynamic balance of water through the processes of dehydration and water absorption. The moisture sensing probe arranged at the front end of the micro water sensor can capture the electrical property change of the oil-water mixture in real time, and the high-precision temperature probe is used for data compensation to obtain the moisture content in the oil. The dielectric constant of a water dielectric constant wall simple polymer material is much larger, and as shown in fig. 4, the dielectric constant of the molecular material obtained after water absorption significantly changes due to the change in the amount of adsorbed water, which causes a change in capacitance value, and thus changes the sensor output value.
The three-in-one viscosity sensor is used for on-line analysis of the density, viscosity and dielectric constant of the lubricating oil, and a piezoelectric resonance MEMS element is adopted. Three indexes of density, viscosity and dielectric constant of the liquid are automatically detected in real time through an internally integrated high-precision signal sampling and processing unit. When the lubricating oil is polluted, the lubricating oil is found and alarmed in time. FIG. 5 is a graph of viscosity as kinematic viscosity, which is related to gravity viscosity by: mu = eta/rho.
The period of oscillation T of the MEMS element is related to the liquid density:
ρ =K0+K1*T +K2*T
wherein: K0K1K2 is an instrument calibration parameter and has no dimension;
t is the vibration period, S;
the vibration quality factor Q of the MEMS element is related to viscosity:
η = C0+ C1*Q + C2*Q2
wherein: c0, C1 and C2 are instrument calibration parameters and have no dimensional quantity;
kinematic viscosity can also be converted according to the following equation:
µ=η/ρ
wherein: mu: kinematic viscosity, mm2/s = cst;
eta: dynamic viscosity, mpa.s = mPa · s;
ρ: density, g.cm.
The metal abrasive particles detect the abrasion condition of the steel tooth surface of the gear box and the non-ferrous metal rolling bearing retainer, and find early failures such as pitting fatigue, gluing abrasion of the tooth surface, deformation and cracking of the retainer and the like in time. As shown in fig. 6, the metal abrasive particle sensor includes an oil flow line on which an excitation coil 21 and a sensing coil 22 are wound, and the sensing coil is connected to a system processor 23. The metal abrasive particle sensor adopts an electromagnetic induction principle, monitors metal particles on line, monitors the abrasion state of equipment in real time, effectively avoids mechanical abnormal abrasion accidents in time, and effectively improves the system fault prediction and diagnosis capability. As shown in fig. 7, the abrasive particle size was monitored: ferromagnetic particles with a diameter greater than 50 μm, non-ferromagnetic particles with a diameter greater than 200 μm.
The invention is used for monitoring the lubrication and wear states of equipment in real time, and adopts a high-viscosity fluid vibration sensing technology, a high-molecular film capacitor technology and a ferromagnetic abrasive particle sensing technology to monitor the viscosity, density, temperature, moisture and wear of oil products in real time, predict the lubrication state of the equipment in advance and replace the oil products in time. While tracking changes in wear to avoid further exacerbations of the accident.
Claims (10)
1. The online analysis system for the lubricating oil of the unit oil station comprises at least one unit oil station (16), unit equipment (19) and an oil station auxiliary oil pump (18), wherein the unit oil station is connected to the unit equipment (19) through the oil station auxiliary oil pump; the method is characterized in that: the system is provided with an online monitor (15), an oil inlet pipe (1), an oil outlet pipe (2), an oil inlet valve (3), an inlet connecting piece (4), an outlet one-way valve (9) and an outlet connecting piece (10); the oil receiving disc of the unit equipment (19) is connected to an oil inlet valve (3) through a lubricating oil return pipeline (20), the outlet of the oil inlet valve (3) is connected to an online monitor (15) through an inlet connecting piece (4) and an oil inlet pipe (1), and the outlet of the online monitor is connected to a unit oil station (16) through an oil outlet pipe (2), an outlet connecting piece (10) and an outlet check valve (9).
2. The unit oil station lubricating oil on-line analysis system of claim 1, which is characterized in that: the on-line monitor (15) is provided with a monitoring oil pump (5), a micro-water sensor (6), a viscosity three-in-one sensor (7), a metal abrasive particle sensor (8), a monitoring controller (11), a display (12) and an oil pipeline (26); the monitoring controller (11) is in communication connection with the monitoring oil pump (5), the micro-water sensor (6), the viscosity three-in-one sensor (7), the metal abrasive particle sensor (8), the monitoring controller (11) and the display (12); the oil inlet pipe (1) is connected to an oil pipeline through a monitoring oil pump (5), and the oil pipeline penetrates through a metal abrasive particle sensor (8), a viscosity three-in-one sensor (7) and a micro-water sensor (6) to be connected to the oil outlet pipe (2).
3. The unit oil station lubricating oil on-line analysis system of claim 1, which is characterized in that: the display (12) is a full Chinese graphical interface and can display a parameter list, a real-time curve graph, a historical curve graph, historical data, an alarm picture and a report.
4. The unit oil station lubricating oil on-line analysis system of claim 1, which is characterized in that: the unit equipment is a compressor unit, an expander unit, a main fan unit or a pump unit.
5. An analysis method of the unit oil station lubricating oil on-line analysis system of claim 1, which is characterized in that: the return lubricating oil of the unit equipment enters an online monitor (15) through a lubricating oil return pipeline (20) and an oil inlet pipe (1), the lubricating oil is introduced from a monitoring oil pump (5), and is analyzed through a micro-water sensor, a viscosity three-in-one sensor and a metal abrasive particle sensor, and the analyzed lubricating oil flows back to a unit oil station (16) through an oil outlet pipe (2); the analysis process comprises the following steps:
the method comprises the steps of detecting through a micro-water sensor (6), analyzing whether trace water in the lubricating oil exceeds the standard or not, and giving an alarm if the trace water in the lubricating oil exceeds the standard or performing the next step if the trace water in the lubricating oil does not exceed the standard;
secondly, detecting by a three-in-one viscosity sensor (7), analyzing whether the viscosity value exceeds the standard, and if so, giving an alarm, otherwise, carrying out the next step;
thirdly, detecting through a metal abrasive particle sensor (8), analyzing whether metal abrasive particles exceed standards, and if the metal abrasive particles exceed standards, giving an alarm, otherwise, returning to the first step;
the on-line analysis process is performed circularly.
6. The on-line analysis method for the unit oil station lubricating oil as claimed in claim 5, which is characterized in that: analyzing trace water in the lubricating oil by adopting a high-molecular film capacitance sensing technology to detect trace water change in the lubricating oil; the micro-water sensor (6) takes a high-molecular humidity sensing film as a sensitive element and achieves the dynamic balance of water through the processes of dehydration and water absorption; the front end of the micro water sensor is provided with a water sensing probe for capturing the electrical property change of the oil-water mixture in real time, and the high-precision temperature probe is used for carrying out data compensation to obtain the water content in the oil.
7. The on-line analysis method for the unit oil station lubricating oil as claimed in claim 5, which is characterized in that: the density, viscosity and dielectric constant of viscosity trinity sensor (7) on-line analysis lubricating oil adopt piezoelectricity resonance MEMS component, and three indexs of density, viscosity and dielectric constant of real-time automated inspection liquid are sampled and the processing unit to inside integrated high accuracy signal.
8. The on-line analysis method for the unit oil station lubricating oil as claimed in claim 7, which is characterized in that: the viscosity is dynamic viscosity, and the relation between the dynamic viscosity and the gravity viscosity is as follows: mu = eta/rho;
wherein: mu: kinematic viscosity, mm2/s=cst；
Eta: dynamic viscosity, mpa.s = mPa · s;
ρ: density, g.cm.
9. The on-line analysis method for the unit oil station lubricating oil as claimed in claim 5, which is characterized in that: the metal abrasive particle sensor adopts an electromagnetic induction principle, monitors metal particles on line and monitors the abrasion state of equipment in real time.
10. The on-line analysis method for the unit oil station lubricating oil as claimed in claim 9, which is characterized in that: abrasive grain size of the monitoring device wear: ferromagnetic particles having a diameter greater than 50 μm; non-ferromagnetic particles having a diameter greater than 200 μm.
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| CN113640353A (en) * | 2021-08-26 | 2021-11-12 | 深圳市先波科技有限公司 | Detection method for on-line monitoring of content of abrasive particles in oil |
| CN114088607A (en) * | 2021-10-25 | 2022-02-25 | 北京京能能源技术研究有限责任公司 | Online monitoring method for fan gear box |
| CN114324829A (en) * | 2021-12-31 | 2022-04-12 | 四川德胜集团钒钛有限公司 | Metallurgical production line lubricating oil management system |
| CN114755396A (en) * | 2022-03-30 | 2022-07-15 | 四川恒诚达科技有限公司 | Oil on-line monitoring 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 |
| CN118294504A (en) * | 2024-04-16 | 2024-07-05 | 中国石化润滑油有限公司济南分公司 | Lubricating oil online monitoring and calibrating method and device based on oil analysis |
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