CN108693223A - The on-line monitoring method and system of active sulfur in liquid oil - Google Patents
The on-line monitoring method and system of active sulfur in liquid oil Download PDFInfo
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- CN108693223A CN108693223A CN201710221033.2A CN201710221033A CN108693223A CN 108693223 A CN108693223 A CN 108693223A CN 201710221033 A CN201710221033 A CN 201710221033A CN 108693223 A CN108693223 A CN 108693223A
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- 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
- G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
- G01N33/287—Sulfur content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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Abstract
The present invention relates to sensor detecting fields, and in particular to the on-line monitoring method and system of active sulfur in a kind of liquid oil.The on-line monitoring system of active sulfur in the liquid oil of the present invention, including:Test chamber for accommodating liquid to be detected oil, the active sulfur sensor that active sulfur is detected in being arranged inside the test chamber for liquid oil in the test chamber, the processing unit for receiving and processing active sulfur sensor output signal.The on-line monitoring method and system of active sulfur in liquid oil provided by the invention realize the on-line real time monitoring to active sulfur in liquid oil using relatively simple method, and accuracy of detection is high.
Description
Technical field
The present invention relates to sensor detecting fields, and in particular to the on-line monitoring side of active sulfur in a kind of liquid oil
Method and system.
Background technology
Liquid oil from oil product processing is mostly oil (crude oil) through mineral oil made of refining refinement, by conduct
Insulating oil, lubricating oil are widely used in industry-by-industry field, in addition to a large amount of alkane, cycloalkane and a small amount of fragrance in constituent
The nytrons beyond the region of objective existence such as hydrocarbon, while also with trace elements such as sulphur intrinsic in crude oil, oxygen, nitrogen, wherein " active sulfur " is oil
A part for middle total sulfur ingredient, and may contain there are many active sulfur, including element sulphur, mercaptan (THIOLS), thioether
(THIO-ETHERS), disulphide (DISULFIDES).
By taking transformer insulation oil as an example, before nineteen ninety is for mid-term, in world wide caused by active sulfur
The damage comparison of transformer is few, but in recent years, generate cuprous sulfide because the active sulfur in transformer oil is reacted with copper winding
And a lot of high-tension apparatuses is caused to break down, according to statistics, since 2000, have nearly hundred large-scale power transformers both at home and abroad
(or reactor) breaks down because of the active sulfur problem in transformer oil;CHINA SOUTHERN POWER company is in 2007 to entire
The in-service 500kV transformers (reactor) of south electric network with oil generally investigated the results show that the equipment oil there are about 14.4% contains
Be corrosive sulphur, just has within only 2005 5 110kV transformers therefore to break down.And the main reason for generating above-mentioned failure
It is that the operating temperature of modern transformer increases than in the past, high temperature can lead to think originally that stable sulfide becomes unstable
Have corrosive sulfide;High temperature while meeting accelerated oxidation reaction speed, make metal sulfide be easier to generate, are dissolved in
In insulating oil, it is attached to the surface of copper and insulating paper, to cause the accident of transformer.
How to solve the problems, such as causes equipment fault to have become because containing " active sulfur " in liquid oil is primarily upon
One of hot spot.And the method for existing detection active sulfur is used in laboratory mostly, such as Unite States Standard
ASTMD1275, basic skills are:Copper sheet, is then placed in oil sample by the polishing copper sheet for obtaining oil sample and experiment first
140 degree are heated to, continues 19 hours or so, by the color of observation copper sheet to judge whether contain active sulfur in oil sample, such as
Fruit copper sheet then illustrates to be free of active sulfur in oil sample in crocus, red, light blue, silver color etc.;But the if color of copper sheet
There is the phenomenon that caking in black, black gray expandable, dark-brown or surface, then it represents that contain active sulfur in oil sample.This method passes through
It observes the color change on copper sheet surface and judges degree of the oil sample by sulfur corrosion;Oxygen concentration is to benzyl disulfide in transformer oil
(DBDS) it is had no significant effect with copper conductor reacting in the oil, but cuprous sulfide (Cu2S) can be influenced in tables such as copper wire, insulating papers
The adhesion condition in face;The fiber distribution of the surface texture, insulating paper of copper wire can be changed after Cu2S attachments, and cause oil-paper compound
Insulative dielectric performance decline etc..Although this method can provide effective test in laboratory means, due to cannot be into
Row real time on-line monitoring, so that the operational safety of transformer, gen-set cannot ensure.
Based on the method for Unite States Standard ASTMD1275, patent CN102608194B discloses corrosivity in a kind of liquid oil
The on-line measuring device of sulphur includes the electrode reacted with active sulfur, light intensity sensor (or color sensor), light source, adds
Heater circuit etc..Although the device realizes on-line monitoring, but have the shortcomings that following:(1) complicated;(2) light source itself
Unstability and liquid oil in reflective light intensity or color caused by other impurity variation, can all influence the precision of detection;
(3) it needs to heat electrode and active sulfur can just be effectively detected.
Invention content
For the defects in the prior art, the on-line monitoring method of active sulfur and it is in liquid oil provided by the invention
System realizes the on-line real time monitoring to active sulfur in liquid oil using relatively simple method, and accuracy of detection is high.
In a first aspect, in a kind of liquid oil provided by the invention active sulfur on-line monitoring system, including:For accommodating
The test chamber of liquid to be detected oil, setting inside the test chamber for active sulfur in liquid oil in the test chamber into
The active sulfur sensor of row detection, the processing unit for receiving and processing active sulfur sensor output signal.
The on-line monitoring system of active sulfur in liquid oil provided by the invention, extracts liquid to be detected from equipment fuel tank
Body is oily, after the liquid oil in chamber to be detected is fully reacted with active sulfur sensor, according to active sulfur sensor output signal
Frequency variation detect the content of active sulfur.System through this embodiment can be realized to active sulfur in liquid oil
On-line real time monitoring reduces to propose scientific and effective suggestion to the opportunity for replacing transformer oil and the machine oil that generates electricity because becoming
Depressor oil and generator/containing high-tension apparatus failure caused by active sulfur either because of generator in engine oil/start
The service life is reduced caused by the failure of machine;In addition, compared with the optical detecting method based on metal erosion, the present embodiment is selected rotten
Corrosion sulfer sensor realizes on-line monitoring, is not necessarily to additional light source, the simpler exquisiteness of structure, accuracy of detection height.
Preferably, further include the oil circulation device being connect with the oil inlet of the test chamber and oil outlet, the oil cycle
Device circulates the liquid oil in the test chamber under the control of the processing unit.
Preferably, the oil circulation device includes oil scavenge pump, the oil scavenge pump by oil guide pipe and the test chamber into
Hydraulic fluid port is connected with oil outlet.
Preferably, the oil circulation device includes:Oil scavenge pump, the first Solenoid ball valve, the second Solenoid ball valve, third electromagnetic ball
Valve, the 4th Solenoid ball valve, the oil inlet being connect with equipment fuel tank are connect through the first Solenoid ball valve with the oil inlet of the oil scavenge pump,
The oil outlet of the oil scavenge pump is connect through the second Solenoid ball valve with the oil inlet of the test chamber, the oil outlet warp of the test chamber
Third Solenoid ball valve is connect with the oil inlet of the oil scavenge pump, for be discharged the oil outlet of waste oil through the 4th Solenoid ball valve with
The oil outlet of the oil scavenge pump connects, first Solenoid ball valve, second Solenoid ball valve, the third Solenoid ball valve, institute
State the 4th Solenoid ball valve, the control terminal of the oil scavenge pump is electrically connected with the processing unit.
Preferably, further include the liquid-level switch being arranged in the test chamber, the liquid-level switch and the processing unit
Connection.
Preferably, the active sulfur sensor include in capacitor element, impedance device, crystal microbalance, BAW at least
It is a kind of.
Preferably, the sensing surface of the crystal microbalance is any one in iron, nickel, ferroalloy, nickel alloy.
Preferably, further include the display screen being connect with the processing unit for showing each item data in monitoring process.
Second aspect, the on-line monitoring method of active sulfur in a kind of liquid oil, including:One is extracted from equipment fuel tank
Divide in liquid oil to the test chamber equipped with active sulfur sensor, the liquid oil is made fully to be connect with the active sulfur sensor
It touches;The output signal of the active sulfur sensor is acquired, the output signal includes frequency, amplitude, phase, impedance value, electricity
It is one or more in capacitance;According to the content of active sulfur in the variation monitoring liquid oil of the output signal.
The on-line monitoring method of active sulfur in liquid oil provided by the invention, extracts liquid to be detected from equipment fuel tank
Body is oily, after the liquid oil in chamber to be detected is fully reacted with active sulfur sensor, according to active sulfur sensor output signal
Frequency variation detect the content of active sulfur.Method through this embodiment can be realized to active sulfur in liquid oil
On-line real time monitoring reduces to propose scientific and effective suggestion to the opportunity for replacing transformer oil and the machine oil that generates electricity because becoming
Depressor oil and generator/containing high-tension apparatus failure caused by active sulfur either because of generator in engine oil/start
The service life is reduced caused by the failure of machine;In addition, compared with the optical detecting method based on metal erosion, what the present embodiment used
Method is not necessarily to additional light source, and detection method is simple, reduces the error risk in detection process, improves accuracy of detection.
Preferably, further include during acquiring the active sulfur sensor output signal:Make in the test chamber
Liquid oil constantly circulate.
Description of the drawings
The structure diagram of the on-line monitoring system of active sulfur in the liquid oil that Fig. 1 is provided by the embodiment of the present invention;
A preferred implementation of the on-line monitoring system of active sulfur in the liquid oil that Fig. 2 is provided by the embodiment of the present invention
The structure diagram of example;
A preferred implementation of the on-line monitoring system of active sulfur in the liquid oil that Fig. 3 is provided by the embodiment of the present invention
The structure diagram of example.
Reference numeral:
1- test chambers;2- active sulfur sensors;3- processing units;4- oil circulation devices;5- oil guide pipes;The first electromagnetism of 6-
Ball valve;The second Solenoid ball valves of 7-;8- third Solenoid ball valves;The 4th Solenoid ball valves of 9-;10- liquid-level switches;11- display screens.
Specific implementation mode
The embodiment of technical solution of the present invention is described in detail below in conjunction with attached drawing.Following embodiment is only used for
Clearly illustrate technical scheme of the present invention, therefore be intended only as example, and the protection of the present invention cannot be limited with this
Range.
It should be noted that unless otherwise indicated, technical term or scientific terminology used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
As shown in Figure 1, in a kind of liquid oil provided in this embodiment active sulfur on-line monitoring system, including:For
Accommodate the test chamber 1 of liquid to be detected oil, during setting is used for liquid oil in test chamber 1 inside the test chamber 1 active sulfur into
The active sulfur sensor 2 of row detection, the processing unit 3 for receiving and processing 2 output signal of active sulfur sensor.
Wherein, liquid oil is equipment liquid oil such as transformer insulation oil, generator lube oil, engine lubricating oil, speed change
Device oil or hydraulic oil etc.;Equipment fuel tank is oil tank of transformer, generator oil tank, engine oil tank, speed changer fuel tank etc..Test chamber
1 extracts liquid oil automatically by Oil sucking device from equipment fuel tank to be detected, and Oil sucking device can be used oil guide pipe 5, pump etc. and set
It is standby to realize, specific limit is not made to the structure of Oil sucking device herein.Processing unit 3 may be used CPU, FPGA, DSP, ARM,
ASIC or other microprocessor chips with the same function are realized, can be selected according to the concrete condition of practical application
Design, does not repeat herein.
Wherein, active sulfur sensor 2 includes capacitor element, impedance device, BAW (Bulk Acoustic Wave, body sound
Wave device) or QCM (crystal microbalance).
Electrode form is made in capacitor element, is made of the material for acid and water sensitive.When the corrosivity in liquid oil
When sulfur content changes, the conductivity of liquid oil is caused to be lower, at this point, the capacitance of capacitor element output can change,
The content of active sulfur can be determined according to the variation of capacitance.In addition, conductivity can be greatly improved in the generation of micro acid, water
Numerical value, the oxidation of capacitor element can also cause the variation of condenser capacitance numerical value bigger, therefore capacitor element carries on the whole
The high sensitivity of detection.
Impedance device can be a series of series connection of Minitype resistances, and the concatenated advantage of resistance is:Even if being generated in liquid oil
Seldom acid and water, the acid also or in liquid oil and water are only and one of resistance reacts or generate erosion, also can be right
Entire series resistance equivalent resistance generates huge variation, that is to say, that the variation of one resistance value of any of which can all make
It obtains this chain of series resistors and generates reaction, therefore improve the flexibility of resistance sensor monitoring to a certain extent.
BAW is similar with the structure of QCM, includes piezo-electric crystal, coated in the sensitive table on two opposite faces of piezo-electric crystal
Face, crystal oscillation circuit.Sensing surface using can the material of being corroded property sulfur corrosion be made, such as metal or alloy material, quartz
Two electrodes of oscillating circuit are separately positioned on the upper and lower surface of piezo-electric crystal, sensitive when encapsulation along with shell encapsulates
Surface exposure is in case surface.In use, the output of crystal oscillation circuit is connected to 3 corresponding interface of processing unit, you can
Acquire output signal.
Sauerbrey it is assumed that outer aid amount homogenous rigidity be attached to the surface of piezo-electric crystal under conditions of, obtain
The resonant frequency of piezo-electric crystal changes the conclusion directly proportional to additional quality, as Sauerbrey equations:△ F=Cf △ M,
Wherein △ F are the frequency change of piezo-electric crystal, and △ M are the mass change value for the substance for being attached to piezoelectric crystal surface, and Cf is
Constant coefficients.When sensing surface and active sulfur contact, sensing surface can gradually be corroded, and the quality of piezoelectric crystal surface subtracts
Small, in terms of Sauerbrey equations, frequency, amplitude, the phase of piezo-electric crystal can all change.Active sulfur contains in liquid oil
Amount it is higher, corrosion it is more serious, therefore, by detect 2 output signal of active sulfur sensor (wherein, output signal include frequency,
Amplitude, phase) variation, so that it may to know the corrosion condition of sensing surface, and then obtain the content of active sulfur in liquid oil,
The data detected are compared with preset alarm threshold value, are alarmed when active sulfur content is more than alarm threshold value.
In addition, piezo-electric crystal can be quartz crystal, can also be piezo-electric crystal, such as GaN, PZT etc. other than quartz.Device
Form can also be bulk wave, surface wave etc..
Active sulfur sensing output signal include:One kind or more in frequency, amplitude, phase, impedance value, capacitance
Kind.One kind in above-mentioned five kinds of signals can be obtained active sulfur content, and a variety of output signals monitor simultaneously, help to improve prison
Survey precision.
The on-line monitoring system of active sulfur in liquid oil provided in this embodiment, is extracted to be detected from equipment fuel tank
Liquid oil after the liquid oil in chamber 1 to be detected is fully reacted with active sulfur sensor 2, is exported according to active sulfur sensor 2
The frequency variation of signal detects the content of active sulfur.System through this embodiment can be realized to corrosivity in liquid oil
The on-line real time monitoring of sulphur reduces to propose scientific and effective suggestion to the opportunity for replacing transformer oil and the machine oil that generates electricity
Because in transformer oil and generator/engine oil contain active sulfur caused by high-tension apparatus failure either because generator/
The service life is reduced caused by the failure of engine;In addition, compared with the optical detecting method based on metal erosion, the present embodiment choosing
It is realized and is monitored on-line with active sulfur sensor 2, be not necessarily to additional light source, the simpler exquisiteness of structure, accuracy of detection height.
If sensing surface is made of copper, need copper being heated to higher temperature (it is Celsius to generally require 150-250
Degree) could occur more significantly to react, in order to reduce system complexity, simplied system structure, active sulfur in the present embodiment
The sensing surface of sensor 2 is made of iron or nickel.Iron, nickel react the temperature needed with active sulfur well below copper, contain
Temperature of the insulating oil of active sulfur inside transformer is higher (can reach 150-200 degrees Celsius), even across pipeline (or oil
Road) cooling after enter test chamber 1 in corrosivity active sulfur sensor 2 contact when, still there is quite high temperature (probably to have
60-90 degrees Celsius), at such temperatures, just there is very high reaction efficiency between iron, nickel and active sulfur, without being added
Heat.The sensing surface of active sulfur sensor 2 can also use ferroalloy or nickel alloy, can also arrive the effect using iron and nickel.
Therefore, in liquid oil provided in this embodiment active sulfur on-line monitoring system, without heating device i.e. can reach it is higher
Accuracy of detection.
In order to allow the active sulfur in liquid oil to be contacted as much as possible with the sensing surface of active sulfur sensor 2, improve
Measurement accuracy, as shown in Fig. 2, the system of the present embodiment further includes the oil cycle being connect with the oil inlet of test chamber 1 and oil outlet
Device 4, oil circulation device 4 circulate the liquid oil in test chamber 1 under the control of processing unit 3.By constantly recycling
Liquid oil in test chamber 1, the active sulfur for making concentration very low are contacted with the sensing surface of active sulfur sensor 2, are improved
Measurement accuracy compares existing detection method and equipment, and the system of the present embodiment is able to detect that the lower active sulfur of concentration,
It can realize on-line monitoring early warning, precautionary measures are just carried out before device fails, loss is preferably minimized.
Wherein, it there are many realization methods of oil circulation device 4, is preferably realized by oil scavenge pump, oil scavenge pump passes through Oil Guide
Pipe 5 is connect with the oil inlet of test chamber 1 and oil outlet, by oil scavenge pump so that the liquid oil in test chamber 1 circulates, is increased
The probability of the sensing surface contact corrosion sulphur of active sulfur sensor 2.
In order to further reduce the volume of system, Oil sucking device and oil circulation device 4 are combined into one, as shown in figure 3, this
Oil circulation device 4 in embodiment includes oil scavenge pump, the first Solenoid ball valve 6, the second Solenoid ball valve 7, third Solenoid ball valve 8, the
Four Solenoid ball valves 9.The oil inlet being connect with equipment fuel tank is connect through the first Solenoid ball valve 6 with the oil inlet of oil scavenge pump, oil scavenge pump
Oil outlet connect with the oil inlet of test chamber 1 through the second Solenoid ball valve 7, the oil outlet of test chamber 1 through third Solenoid ball valve 8 with
The oil inlet of oil scavenge pump connects, and the oil outlet for waste oil to be discharged is connect through the 4th Solenoid ball valve 9 with the oil outlet of oil scavenge pump, the
One Solenoid ball valve 6, the second Solenoid ball valve 7, third Solenoid ball valve 8, the 4th Solenoid ball valve 9, oil scavenge pump control terminal with processing
Device 3 is electrically connected, and the first Solenoid ball valve 6, the second Solenoid ball valve 7, the 8, the 4th electricity of third Solenoid ball valve are controlled by processing unit 3
The switch of magnetic ball valve 9, oil scavenge pump.
In order to realize that it further includes the liquid being arranged in test chamber 1 to automatically control the system that the present embodiment is measured in the extraction that liquid has
Bit switch 10, liquid-level switch 10 are connect with processing unit 3.
The system of the present embodiment further includes the display screen being connect with processing unit 3 for showing each item data in monitoring process
11, monitoring personnel passes through 11 real-time system operation conditions of display screen and monitoring result.
System starts open the first Solenoid ball valve 6 and the second Solenoid ball valve 7 under the control of processing unit 3, close the
Three Solenoid ball valves 8 and the 4th Solenoid ball valve 9 control oil suction pump work, the liquid oil in equipment fuel tank through the first Solenoid ball valve 6,
Enter in test chamber 1 after oil scavenge pump and the second Solenoid ball valve 7;After liquid level reach a certain height in test chamber 1, triggering liquid level is opened
10 are closed, processing unit 3 opens third Solenoid ball valve 8 after closing the first Solenoid ball valve 6 and oil scavenge pump, and is again turned on oil scavenge pump,
Liquid oil in test chamber 1 starts the cycle over flowing, and processing unit 3 receives 2 output signal of active sulfur sensor, obtained after processing
The testing result of sulfur content;After reaching the time needed for detection, third Solenoid ball valve 8 is opened, by the liquid oil in test chamber 1
Discharge.
Based on inventive concept identical with the on-line monitoring system of active sulfur in aforesaid liquid oil, the present embodiment also provides
The on-line monitoring method of active sulfur in a kind of liquid oil, including:Extracted from equipment fuel tank a part of liquid oil to equipped with
In the test chamber 1 of active sulfur sensor 2, liquid oil is made to be come into full contact with active sulfur sensor 2;Acquire active sulfur sensing
The output signal of device 2, wherein output signal includes frequency, amplitude, phase, impedance value, capacitance;According to the change of output signal
Change the content of active sulfur in monitoring liquid oil.
The on-line monitoring method of active sulfur in liquid oil provided in this embodiment, is extracted to be detected from equipment fuel tank
Liquid oil after the liquid oil in chamber 1 to be detected is fully reacted with active sulfur sensor 2, is exported according to active sulfur sensor 2
The frequency variation of signal detects the content of active sulfur.Method through this embodiment can be realized to corrosivity in liquid oil
The on-line real time monitoring of sulphur reduces to propose scientific and effective suggestion to the opportunity for replacing transformer oil and the machine oil that generates electricity
Because in transformer oil and generator/engine oil contain active sulfur caused by high-tension apparatus failure either because generator/
The service life is reduced caused by the failure of engine;In addition, compared with the optical detecting method based on metal erosion, the present embodiment is adopted
Method is not necessarily to additional light source, and detection method is simple, reduces the error risk in detection process, improves accuracy of detection.
Preferably, further include during acquiring active sulfur 2 output signal of sensor:Make the liquid in test chamber 1
Oil constantly circulates, and the active sulfur for making concentration very low touch sensitive surface as much as possible further increases accuracy of detection.
Preferably, the sensing surface of active sulfur sensor 2 is iron or nickel or ferroalloy or nickel alloy.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement;And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover in the claim of the present invention and the range of specification.
Claims (10)
1. the on-line monitoring system of active sulfur in a kind of liquid oil, which is characterized in that including:
Test chamber for accommodating liquid to be detected oil,
The active sulfur that active sulfur is detected in being arranged inside the test chamber for liquid oil in the test chamber
Sensor,
Processing unit for receiving and processing active sulfur sensor output signal.
2. system according to claim 1, which is characterized in that further include connecting with the oil inlet of the test chamber and oil outlet
The oil circulation device connect, the oil circulation device recycle the liquid oil in the test chamber under the control of the processing unit
Flowing.
3. system according to claim 2, which is characterized in that the oil circulation device includes oil scavenge pump, the oil scavenge pump
It is connect with the oil inlet of the test chamber and oil outlet by oil guide pipe.
4. system according to claim 2, which is characterized in that the oil circulation device includes:Oil scavenge pump, the first electromagnetic ball
Valve, the second Solenoid ball valve, third Solenoid ball valve, the 4th Solenoid ball valve,
The oil inlet being connect with equipment fuel tank is connect through the first Solenoid ball valve with the oil inlet of the oil scavenge pump,
The oil outlet of the oil scavenge pump is connect through the second Solenoid ball valve with the oil inlet of the test chamber,
The oil outlet of the test chamber is connect through third Solenoid ball valve with the oil inlet of the oil scavenge pump,
Oil outlet for waste oil to be discharged is connect through the 4th Solenoid ball valve with the oil outlet of the oil scavenge pump,
It is first Solenoid ball valve, second Solenoid ball valve, the third Solenoid ball valve, the 4th Solenoid ball valve, described
The control terminal of oil scavenge pump is electrically connected with the processing unit.
5. system according to claim 4, which is characterized in that further include the liquid-level switch being arranged in the test chamber,
The liquid-level switch is connect with the processing unit.
6. system according to claim 1, which is characterized in that the active sulfur sensor includes capacitor element, impedance
At least one of device, crystal microbalance, BAW.
7. system according to claim 6, which is characterized in that the sensing surface of the crystal microbalance is iron, nickel, iron conjunction
Gold, any one in nickel alloy.
8. system according to claim 1, which is characterized in that further include being connect with the processing unit for showing monitoring
The display screen of each item data in the process.
9. the on-line monitoring method of active sulfur in a kind of liquid oil, which is characterized in that including:
Extracted in a part of liquid oil to the test chamber equipped with active sulfur sensor from equipment fuel tank, make the liquid oil with
The active sulfur sensor comes into full contact with;
The output signal of the active sulfur sensor is acquired, the output signal includes frequency, amplitude, phase, impedance value, electricity
It is one or more in capacitance;
According to the content of active sulfur in the variation monitoring liquid oil of the output signal.
10. according to the method described in claim 9, it is characterized in that, acquiring the active sulfur sensor output signal
Further include in the process:The liquid oil in the test chamber is set constantly to circulate.
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Application publication date: 20181023 |