CN111812305A - On-line lubricating oil detection sensor - Google Patents
On-line lubricating oil detection sensor Download PDFInfo
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- CN111812305A CN111812305A CN201910284276.XA CN201910284276A CN111812305A CN 111812305 A CN111812305 A CN 111812305A CN 201910284276 A CN201910284276 A CN 201910284276A CN 111812305 A CN111812305 A CN 111812305A
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 72
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 230000005291 magnetic effect Effects 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000000314 lubricant Substances 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 43
- 239000002245 particle Substances 0.000 abstract description 42
- 230000003647 oxidation Effects 0.000 abstract description 19
- 238000007254 oxidation reaction Methods 0.000 abstract description 19
- 238000005259 measurement Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
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- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention provides an on-line lubricating oil detection sensor, comprising: a probe site and an output site, further comprising: the system comprises a first sensor, a first magnet and a main control module; the probe site, comprising: an end face and a side wall; the detection part is connected with the output part in a sealing way; the first sensor is connected with the main control module; the main control module is connected with external intelligent equipment; the detection part is inserted into the detected lubricating oil of the bearing from a screw hole of the magnetic plug by replacing the magnetic plug; the main control module is arranged at the output part; the first sensor and the first magnet are both disposed inside the side wall. The on-line lubricating oil detection sensor provided by the invention not only can replace a magnetic plug to adsorb a large amount of ferromagnetic particles in lubricating oil to play a role in purifying the lubricating oil, but also can detect the concentration of the ferromagnetic particles in the detected lubricating oil and parameters reflecting the oxidation degree of the lubricating oil.
Description
Technical Field
The invention relates to the technical field of sensor detection, in particular to an online lubricating oil detection sensor.
Background
In industrial equipment, lubricating oil needs to be added into mechanical bearings so as to reduce friction and prolong the service life of the bearings. Such as high-speed rail motor drive bearings, fan bearings, helicopter gearboxes, aircraft engines, gas turbines, etc. After the bearing is used for a long time, the bearing is worn, the wear degree and speed of various devices are different, and some devices can generate great wear in a short time. If the fault cannot be found in time, the fault of mechanical equipment can be caused, and unnecessary loss is caused. After the lubricating oil is oxidized and disintegrated, the abrasion of the bearing is accelerated, ferromagnetic particles are generated, and in order to reduce the concentration of the ferromagnetic particles in the lubricating oil, a magnetic plug is generally arranged on the side surface of a gearbox lubricating oil tank of the bearing and used for adsorbing the ferromagnetic particles, but the magnetic plug cannot be used for detecting the concentration of the ferromagnetic particles. In the prior art, the detection of the bearing wear condition and the lubricating oil oxidation and disintegration condition is manually judged according to experience or detected in a laboratory, and the bearing and lubricating oil condition cannot be detected in time, so that unnecessary loss is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an online lubricating oil detection sensor which can increase the sensing function of a magnetic plug, detect the concentration of ferromagnetic particles in lubricating oil reflecting equipment wear and detect parameters reflecting the oxidation degree of the lubricating oil.
The invention provides an on-line lubricating oil detection sensor, comprising: a probe site and an output site, further comprising: the system comprises a first sensor, a first magnet and a main control module; the probe site, comprising: an end face and a side wall;
the detection part is connected with the output part in a sealing way;
the first sensor is connected with the main control module; the main control module is connected with external intelligent equipment;
the detection part is inserted into the detected lubricating oil of the bearing from a screw hole of the magnetic plug by replacing the magnetic plug;
the main control module is arranged at the output part;
the first sensor and the first magnet are both disposed inside the side wall.
Optionally, the first sensor is one or more of a capacitive sensor, an inductive sensor and a resonant sensor.
Optionally, the method further includes: a second sensor;
the second sensor is arranged on the end face of the detection part;
the second sensor is connected with the main control module.
Optionally, the second sensor is one or more of a capacitance sensor, a conductivity sensor and a corrosion degree sensor.
Optionally, the method further includes: a temperature sensor;
the temperature sensor is arranged at the detection part and is connected with the main control module;
the temperature sensor is used for detecting the temperature of the lubricating oil and sending a detected lubricating oil temperature signal to the main control module.
Optionally, the first magnet is a strong magnet.
Optionally, the side wall is a cylindrical or polygonal columnar structure.
The invention provides an online lubricating oil detection sensor, which can adsorb a large amount of ferromagnetic particles in lubricating oil by arranging a first magnet in the side wall, thereby playing a role in purifying the lubricating oil; simultaneously, through set up first sensor in the inside of lateral wall, when ferromagnetic particle adsorbs the lateral wall, can arouse first sensor measuring value to change, difference around through the first sensor measuring value, can obtain the ferromagnetic particle concentration in being detected lubricating oil and reflect the parameter of the lubricating oil oxidation degree, technical staff in the field can judge the bearing wearing and tearing situation according to ferromagnetic particle concentration, can also in time know the in service behavior of lubricating oil according to the lubricating oil oxidation degree, and then can remind fortune dimension personnel in time to maintain, avoid vehicle and mechanical equipment trouble, the extension is maintained the interval, reduce the maintenance cost.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an on-line lubricant detection sensor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a capacitive online lubricant detection sensor according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The invention provides an online lubricating oil detection sensor. Embodiments of the present invention will be described below with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of an online lubricant detecting sensor according to an embodiment of the present invention, where the online lubricant detecting sensor includes: probe site 100 and output site 200, further comprising: the device comprises a first sensor L1, a first magnet and a main control module; the probe site 100, comprising: end face 101 and side wall 102; the detection part 100 is hermetically connected with the output part 200; the first sensor L1 is connected with the main control module; the main control module is connected with external intelligent equipment; the detection part 100 is inserted into the detected lubricating oil of the bearing from a screw hole of the magnetic plug by replacing the magnetic plug; the main control module is arranged at the output part 200; the first sensor L1 and the first magnet are both disposed inside the side wall 102.
According to the invention, the first magnet is arranged in the side wall 102, so that a large amount of ferromagnetic particles in lubricating oil can be adsorbed, and the lubricating oil purification effect is achieved; meanwhile, by arranging the first sensor L1 inside the side wall 102, when the ferromagnetic particles are adsorbed to the side wall 102, the change of the measurement value of the first sensor L1 is caused, and by the difference between the front and the back of the measurement value of the first sensor L1, the concentration of the ferromagnetic particles in the detected lubricating oil and the parameter reflecting the degree of oxidation of the lubricating oil can be obtained.
Wherein the detection portion 100 and the output portion 200 are hermetically connected by a sealing portion 300 to prevent the lubricant from flowing out. Further, a fixing portion 400 may be connected to a rear surface of the output portion 200, and the fixing portion 400 facilitates a user to screw the sensor device to a plug screw hole of the bearing.
Wherein, first magnet adopts strong magnet, can adsorb a large amount of ferromagnetic particles in the lubricating oil.
The main control module can receive a measured value of the first sensor L1 in real time, can directly calculate the concentration of ferromagnetic particles in the lubricating oil and parameters reflecting the oxidation degree of the lubricating oil according to the change condition of the measured value, and then sends a calculation result to external intelligent equipment in a wired or wireless mode; the main control module can also send the measured value of the first sensor L1 to an external intelligent device in real time, and the external intelligent device calculates the concentration of ferromagnetic particles in the lubricating oil and parameters reflecting the degree of oxidation of the lubricating oil according to the change of the measured value. Both of these ways are within the scope of the present invention. The main control module can communicate with external intelligent equipment in a wireless or wired mode.
When the concentration of ferromagnetic particles in the lubricating oil and the parameters reflecting the oxidation degree of the lubricating oil are calculated, the one-to-one correspondence relationship between the capacitance value and the inductance value of the sensor and the ferromagnetic concentration can be obtained according to experiments, so that the calculation result is conveniently obtained. After obtaining the result, the ferromagnetic particle concentration can be compensated according to the state of the oil tank and the time of using the equipment. Temperature compensation will be described later, so that when the calculation result is compensated, compensation in various aspects, such as mailbox status, device use time, temperature, etc., can be performed.
In the present invention, the sidewall 102 may have a cylindrical, polygonal cylindrical, etc. structure, which is within the scope of the present invention.
The first sensor L1 may be one or more of a capacitive sensor, an inductive sensor, a resonant sensor, and the like. The first sensor L1 may include a plurality of sensors, which may be of various types, and fall within the scope of the present invention.
Wherein, resonant mode sensor includes: LC, RC, LRC, etc., wherein LC is inductance-capacitance, RC is resistance-capacitance, LRC is inductance-resistance-capacitance resonance circuit.
When the first sensor L1 is a capacitive sensor and/or an inductive sensor, it is necessary to dispose an electrode on the sidewall 102, and the electrode is disposed to protrude from the sidewall 102, so that the measurement value of the first sensor L1 changes after the ferromagnetic particles are adsorbed. The electrode may be provided in any shape, which is within the scope of the present invention. As shown in fig. 2, electrodes E1 and E2 are provided.
When the first sensor L1 is a capacitive sensor, a plurality of capacitive sensors may be provided, a strong magnet is provided in the middle of the capacitive sensor to adsorb ferromagnetic particles, and when the ferromagnetic particles are adsorbed to the electrode, the measurement value of the capacitive sensor is changed; when the first sensor L1 is an inductance sensor, the inductance sensor is disposed inside the sidewall 102 in a threaded manner, a strong magnet is disposed in the middle of the inductance sensor to adsorb ferromagnetic particles, and when the ferromagnetic particles are adsorbed to the electrode, the measurement value of the inductance sensor is changed; when the first sensor L1 is a resonant sensor, no electrode needs to be provided, and when the first magnet provided in the side wall 102 adsorbs ferromagnetic particles, the frequency of the resonant sensor is changed, and the measurement value of the resonant sensor is changed.
In the present invention, a second sensor for detecting the concentration of ferromagnetic particles in the lubricating oil and a parameter reflecting the degree of oxidation of the lubricating oil may also be provided at the end surface 101 of the probe portion 100. When the outer surface of the side wall 102 is completely covered with the ferromagnetic particles, the sensitivity of the first sensor L1 will be reduced, affecting the measurement result, and therefore, by providing the second sensor, it is possible to more accurately measure the concentration of the ferromagnetic particles in the lubricating oil and the parameter reflecting the degree of oxidation of the lubricating oil.
Wherein the second sensor is arranged on an end face 101 of the detection part 100; the second sensor is connected with the main control module.
The main control module can acquire the measured value of the second sensor in real time, analyze and calculate the acquired measured value, and can obtain the concentration of ferromagnetic particles of the detected lubricating oil and parameters reflecting the oxidation degree of the lubricating oil.
Wherein, the second sensor can adopt one or more of a capacitance sensor, a conductivity sensor, a corrosion degree sensor and the like. .
Example 1: the second sensor comprises first capacitive sensor and second capacitive sensor, first capacitive sensor and second capacitive sensor have the same physical structure, just first capacitive sensor back is provided with the second magnet.
The first capacitive sensor and the second capacitive sensor can both adopt capacitive sensors; the first capacitive sensor and the second capacitive sensor are each formed from a plurality of E-shaped electrodes in a cross-hand configuration.
Wherein, the back of first capacitive sensor is provided with the second magnet, and through setting up the second magnet, the surface of first capacitive sensor can adsorb the ferromagnetic particle in the lubricating oil, improves first capacitive sensor's dielectric constant, and then improves the numerical value of first capacitive sensor measuring value. When no ferromagnetic particles exist in the detected lubricating oil, the physical structures of the first capacitance sensor and the second capacitance sensor are completely the same, so that the collected measured values of the first capacitance sensor and the second capacitance sensor are equal; when there is ferromagnetic particle in being detected lubricating oil, the surface adsorption of first capacitance sensor has ferromagnetic particle, can greatly increase dielectric constant on every side, and then can increase the numerical value of first capacitance sensor measuring value.
When the first capacitive sensor and the second capacitive sensor are capacitive sensors, the ferromagnetic particles greatly increase the dielectric constant around the E-shaped electrode, and rise substantially linearly, and the curve tends to be gentle when the ferromagnetic particle concentration exceeds a certain value, for example, 2000 PPM. Therefore, the ferromagnetic particle concentration can be obtained from the measurement values of the first capacitive sensor and the second capacitive sensor.
When the lubricant is oxidized, the oxidation products are typically polar molecules such as water, acids, alcohols, phenols, and the like. The antioxidant added in advance to the lubricating oil generally contains a basic substance, and the basic substance reacts with acid to generate salt and water, so that acidity is inhibited, but the polarity of the lubricating oil is increased, and the increase of the polarity of the lubricating oil causes the increase of the dielectric constant of the lubricating oil. The result of the oxidation of the lubricating oil is that the measured values of the first and second capacitive sensors increase simultaneously, and proportionally. The increase in the concentration of ferromagnetic particles is such that the measurement of the first capacitive sensor increases and the measurement of the second capacitive sensor remains substantially unchanged, so that the degree of oxidative disintegration can be calculated from the change in the measurement of the second capacitive sensor.
Example 2: the second sensor can adopt a conductivity sensor, a magnet can not be arranged behind the second sensor, and the electrode of the second sensor is also in an E-shaped electrode shape; the electrode change surface is not covered by insulating varnish.
Example 3: the second sensor can adopt a corrosion degree sensor, a magnet can not be arranged at the back of the second sensor, and the electrode shape is also an E-shaped electrode; the electrode change surface is not covered by insulating varnish.
In the present invention, the method may further include: a temperature sensor; the temperature sensor is arranged at the detection part 100 and is connected with the main control module; the temperature sensor is used for detecting the temperature of the lubricating oil and sending a detected lubricating oil temperature signal to the main control module.
At lower temperatures, the following two effects can occur: 1. the adsorption capacity of the lubricating oil to the ferromagnetic particles decreases with increasing temperature, and at lower temperatures, the ferromagnetic particles are more resistant to the lubricating oil. 2. At lower temperatures, the dielectric constant of various polar molecules is low, e.g., water, acids, alcohols, phenols, and the like. Therefore, the calculation results are affected when the temperature is low.
When the main control module calculates the concentration of ferromagnetic particles in the lubricating oil and parameters reflecting the oxidation degree of the lubricating oil according to the change condition of the measured value of the first sensor L1, the temperature compensation needs to be performed on the calculation result through the received temperature signal; when the main control module sends the measured value of the first sensor L1 to the external intelligent device in real time, and the external intelligent device calculates the ferromagnetic particle concentration in the lubricating oil and the parameter reflecting the oxidation degree of the lubricating oil according to the change condition of the measured value, the main control module needs to send a real-time temperature signal to the external intelligent device, so that the external intelligent device can perform temperature compensation on the calculation result according to the temperature signal.
The concentration of ferromagnetic particles in the detected lubricating oil and the parameters reflecting the oxidation degree of the lubricating oil can be obtained through the invention, and the dielectric constant, the oxidation moisture content, the conduction condition, the chemical corrosion condition and the like of the lubricating oil can also be obtained through the invention, and the dielectric constant, the oxidation moisture content, the conduction condition, the chemical corrosion condition and the like can be calculated through the measurement value of the first sensor L1, and the calculation process belongs to the common knowledge in the field and is not repeated herein.
The above is an online lubricating oil detection sensor provided by the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. An on-line lubricant detection sensor comprising: detection position and output position, its characterized in that still includes: the system comprises a first sensor, a first magnet and a main control module; the probe site, comprising: an end face and a side wall;
the detection part is connected with the output part in a sealing way;
the first sensor is connected with the main control module; the main control module is connected with external intelligent equipment;
the detection part is inserted into the detected lubricating oil of the bearing from a screw hole of the magnetic plug by replacing the magnetic plug;
the main control module is arranged at the output part;
the first sensor and the first magnet are both disposed inside the side wall.
2. The sensor of claim 1, wherein the first sensor is one or more of a capacitive sensor, an inductive sensor, and a resonant sensor.
3. The sensor of claim 1, further comprising: a second sensor;
the second sensor is arranged on the end face of the detection part;
the second sensor is connected with the main control module.
4. The sensor of claim 3, wherein the second sensor employs one or more of a capacitive sensor, a conductivity sensor, and a corrosion sensor.
5. The sensor of claim 1, further comprising: a temperature sensor;
the temperature sensor is arranged at the detection part and is connected with the main control module;
the temperature sensor is used for detecting the temperature of the lubricating oil and sending a detected lubricating oil temperature signal to the main control module.
6. The sensor of claim 1, wherein the first magnet is a strong magnet.
7. The sensor of claim 1, wherein the side wall is a cylindrical or polygonal columnar structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910284276.XA CN111812305B (en) | 2019-04-10 | 2019-04-10 | On-line lubricating oil detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910284276.XA CN111812305B (en) | 2019-04-10 | 2019-04-10 | On-line lubricating oil detection sensor |
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| CN114295526A (en) * | 2021-12-31 | 2022-04-08 | 哈尔滨工程大学 | Bypass fluid grit monitoring trapping apparatus |
| CN116124663A (en) * | 2023-04-13 | 2023-05-16 | 北京致感科技有限公司 | Online ferromagnetic particle detection system |
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| Publication number | Publication date |
|---|---|
| CN111812305B (en) | 2022-12-27 |
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