KR20130039025A - Monitoring system for moisture variation in the oil tank - Google Patents

Monitoring system for moisture variation in the oil tank Download PDF

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Publication number
KR20130039025A
KR20130039025A KR1020110103447A KR20110103447A KR20130039025A KR 20130039025 A KR20130039025 A KR 20130039025A KR 1020110103447 A KR1020110103447 A KR 1020110103447A KR 20110103447 A KR20110103447 A KR 20110103447A KR 20130039025 A KR20130039025 A KR 20130039025A
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KR
South Korea
Prior art keywords
oil tank
water content
oil
measurement data
upper limit
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KR1020110103447A
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Korean (ko)
Inventor
진영성
Original Assignee
주식회사 세나코
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Priority to KR1020110103447A priority Critical patent/KR20130039025A/en
Publication of KR20130039025A publication Critical patent/KR20130039025A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2260/00—Fail safe
    • F16N2260/02—Indicating
    • F16N2260/14—Indicating using sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2260/00—Fail safe
    • F16N2260/02—Indicating
    • F16N2260/18—Indicating necessity of changing oil

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The present invention is to measure the water content of the oil contained in the high temperature and high pressure oil tank in real time to monitor the water content of the high temperature and high pressure oil tank to prevent the performance degradation of the engine drive unit due to the reduction in lubrication characteristics in advance It is about.
The present invention for realizing this is installed in the oil tank 100 for high temperature, high pressure measuring unit 110 including a detection sensor 111 for measuring the water content; A transmitter 120 for outputting measurement data measured through the measurement unit 110; A data processing unit for receiving the measurement data output from the transmitter 120 and displaying it on the display window 131 and comparing / determining whether or not the measurement data exceeds the upper limit reference value with reference to a preset upper limit reference value. Receiving unit 130, including 133; And an alarm generator 140 for generating an alarm alarm when the measurement data exceeds an upper limit reference value.

Description

Monitoring system for moisture variation in the oil tank

The present invention relates to a water content monitoring system of an oil tank for high temperature and high pressure, and more particularly, to a high temperature and high pressure oil tank capable of measuring the water content in a circulation tank of a high temperature and high pressure oil tank and a lubricant in real time. A water content monitoring system of a high pressure oil tank.

In general, as various types of oil tanks have been electronicized through the implementation of industrial networks, the status measuring and monitoring system of various fuel oils and lubricants contained in the oil tanks is also being advanced, and the lubrication system is one of the core performances of the industrial oil tanks. Performance measurement and monitoring technology is emerging.

Specifically, lubricants containing water are contained in the lubricating oil supplied to the cylinder liner in which the piston reciprocates in the diesel engine used in ships, the main bearing supporting the crankshaft, and the crosshead bearing. Is supplied, the engine life is shortened due to the deterioration of the core parts, which are directly related to the engine performance and life. Also, the deterioration of the lubrication characteristics causes the wear of the bearing part, which causes the problem of replacement. . As the lubrication property of the oil decreases, the free moisture is generated along with the increase in the internal moisture content, thereby degrading the lubrication property, which is an intrinsic property of the oil.

This makes it possible to judge the lubrication characteristics by measuring the water content of the oil contained in the oil tank and the lubrication tank of the lubricating oil, thus preventing the wear of the cylinder liner, the main bearing and the crosshead / crankpin bearing. To prevent this, there should be a system, and in order to implement this, the application of condition based inspection to conduct overhaul inspection, which is periodically carried out by existing ships, in accordance with engine driving engine and oil condition There is a need for a system that can provide evidence.

Currently, the water content system used in foreign countries uses a capacitive humidity sensor using a polymer membrane suitable for measuring the moisture of oil. The measurement items are water activity (aw), 0 ~ 1 error is ± 0.02 ~ 0.03, relative humidity (% RH) is 0 ~ 100%, concentration is 1000ppm, temperature is 0 ~ 180 ℃, and pressure is 0 ~ 250bar, output is analog 0 ~ 20㎃ / 4 ~ 20㎃ and digital is RS232, RS485, but there are products using LAN and WLAN in recent years. The measured value is displayed on the LCD. In case of no indication, analog and digital output and relay are used for indication, alarm and control. The protection grade is IP65 or IP67, and the power is mostly oil-safe 12 ~ 30V DC and 30V AC, sometimes used in 100 ~ 240V AC transmitters, and explosion proof for installation in potentially explosive areas. There is a certified product.

However, because the moisture content system is made of a sensor probe that is difficult to withstand high temperature and high pressure, it is necessary to develop a high temperature and high pressure moisture content measuring system suitable for transportation and storage oil products and marine engine equipment. To achieve this, we independently developed IP67-class capacitive sensor probes for high temperature and high pressure, and designed digital signal processing (DSP) circuits that calculate the water activity, temperature, dew point, and enthalpy from the sensor. Development of hardware design technology is required.

The present invention has been made to solve the above problems, by measuring the water content of the oil contained in the oil tank for high temperature, high pressure in real time high temperature to prevent the performance degradation of the engine drive unit due to the reduction in lubrication characteristics in advance To provide a water content monitoring system for high pressure oil tanks.

The water content monitoring system of the high temperature and high pressure oil tank of the present invention for realizing the above object comprises: a measuring unit including a detection sensor installed in the high temperature and high pressure oil tank to measure the water content; A transmitter for outputting measurement data measured through the measurement unit; A receiving unit including a data processing unit for receiving the measurement data output from the transmitting unit and displaying the measured data on a display window and comparing / determining whether the measurement data exceeds the upper limit reference value with reference to a preset upper limit reference value; And an alarm generator for generating an alarm alarm when the measured data exceeds an upper limit reference value.

In this case, the detection sensor, a rod-shaped sensor housing for measuring the water content contained in one side of the oil tank is inserted into the oil tank; And a screw part formed corresponding to the outer circumference of the other side of the sensor housing so that the sensor housing can be fixedly installed in a screw hole formed through one side of the oil tank.

The sensor housing is characterized in that the measurement signal due to the external noise is not changed, the surface roughness is formed of a stainless material that can prevent the oil leakage.

According to the present invention according to the configuration as described above, the real-time monitoring is made so that the moisture tank in the circulating tank of the oil tank and lubricating oil does not occur above the upper limit, for example, the water and the oil into the diesel engine used in ships or automobiles, etc. There is an advantage that can be prevented from being supplied together.

1 is an overall configuration diagram showing a water content monitoring system of a high temperature and high pressure oil tank according to the present invention,
2 is a view showing a measuring unit and a transmitting and receiving unit according to the present invention;
3 is a state in which a detection sensor is installed in the oil tank according to the present invention,
4 is a flowchart of a water content monitoring system of an oil tank according to the present invention;
5 is a graph showing the correlation between water activity, water content, water solubility and temperature according to the type and condition of oil according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals as in the drawings denote the same elements in the drawings, unless they are indicated on other drawings.

1 is an overall configuration diagram showing a water content monitoring system of a high temperature and high pressure oil tank according to the present invention, Figure 2 is a view showing a measuring unit and a transmitting and receiving unit according to the present invention, Figure 3 according to the present invention 4 is a state diagram of a detection sensor installed in an oil tank, and FIG. 4 is a flowchart of a water content monitoring system of an oil tank according to the present invention.

Referring to FIGS. 1 and 2, in a diesel engine used in a ship or the like, deterioration of the state of core parts directly related to engine performance and lifespan such as a cylinder liner in which a piston reciprocates, a main bearing supporting a crankshaft, and a crosshead bearing It is closely related to the deterioration of lubrication characteristics by oil, and free water is generated along with an increase in water content in the oil, thereby degrading lubrication characteristics, which are inherent to oil.

The water content monitoring system of the oil tank according to the preferred embodiment of the present invention to measure the water content in the oil tank and the like to monitor the state of the lubrication characteristics in real time to prevent the performance degradation of the engine drive in advance. It may be configured to include a measuring unit 110, a transmitter 120, a receiver 130, an alarm generator 140.

Each of the configurations of the present invention will be described below.

First, the measuring unit 110 is installed in a high temperature and high pressure oil tank 100 in which oil is stored and a circulating tank of lubricating oil (hereinafter referred to as an oil tank) to detect a detection sensor 111 measuring water content. Include. Here, preferably, the detection sensor 111 is a rod-shaped sensor housing 113 and the sensor housing 113, one side of which is inserted into the oil tank 100 to measure the water content contained in the received oil. ) May be formed to include a screw portion 114 formed to correspond to the outer circumference of the other side of the sensor housing 113 to be fixed to the screw hole 101 formed through one side of the oil tank (100).

In addition, the detection sensor 111 is soaked in the stored oil can smoothly measure the moisture content and temperature, dew point, enthalpy, etc. for a long time, there is no fluctuation of the measurement signal due to external noise, surface finish roughness oil leakage It should be possible to prevent the occurrence.

Accordingly, the detection sensor 111 should give priority to the design of the electronic circuit related to the selection of the capacitive humidity sensor and the temperature sensor (RTD) and the technique of improving the measurement accuracy so that the water content has a resolution of 0.1%. . In particular, the design technology of the sensor housing 113 excellent in oil resistance and high temperature characteristics satisfying the classification criteria should be developed in order to differentiate it from other companies' products with equipment specialized for ships. Such a sensor housing 113 is made of stainless steel. It is preferable to form from a material.

In addition, the cable 115 that is electrically connected to the detection sensor 111 is preferably designed with a synthetic resin material that can ensure the stability of the electrical signal.

Transmitter 120 serves to transmit the data signal measured in the oil tank 100, preferably, such a transmitter 120 is measured by the detection sensor 111 of the measurement unit 110 The moisture content in the oil, as well as the measurement data of the oil temperature, dew point, enthalpy, etc. are transmitted to the receiver 130. In this case, the present invention will be described by taking an example of measuring the moisture content among various types of measurement data, but is not limited thereto.

The receiving unit 130 receives the measurement data from the transmitting unit 120 and displays the measured data on the display window 131 programmed in a graphical environment. The receiving unit 130 refers to the set upper limit reference value and the measured data is the upper limit reference value. It includes a data processing unit 133 for comparing / determining whether or not exceeded.

The alarm generator 140 outputs the measurement data from the receiver 130 to the display window 131 and at the same time serves to generate an alarm alarm when the measurement data exceeds the upper limit reference value. In this case, the worker determines that the water in the oil tank 100 has exceeded the upper limit reference value through the alarm alarm of the alarm generator 140, and takes immediate action.

Then, the process of measuring the water content in the oil tank using the water content monitoring system of the oil tank of the present invention as described above will be described with reference to FIG.

First, when water flows into the oil tank 100 and the circulation tank of the lubricating oil that circulates and supplies the oil in the diesel engine, or when water generated in the oil tank 100 is generated by condensation, such water is the oil and the specific gravity. It doesn't mix with each other for this reason. This water is present in the form of bubbles in the oil to be circulated, or rises to the surface of the oil or sinks to the bottom due to the difference in specific gravity.

In this case, the measurement unit 110 generates a predetermined electrical signal at the moment of detecting a bubble shape or a submerged or floating water contained in the oil contained through the detection sensor 111 installed on one side of the oil tank 100. (S201).

After the analog signal generated by the detection sensor 111 is converted and amplified into a digital signal, the measurement data is output through the transmitter 120 provided at one side of the detection sensor 111 (S203).

The output measurement data is received by the receiving unit 130 and displayed in real time on the display window 131, and compared with the determination whether or not the measured data measured by the data processing unit 133 exceeds the set upper limit of the reference moisture Will be made (S205).

At this time, the data processing unit 133 of the receiving unit 130 diagnoses the need to replace the oil or lubricating oil when the received measurement data exceeds the preset upper limit reference value (S207), and at the same time through the alarm generating unit 140 Generate an alarm alarm (S209).

Through the occurrence of the alarm alarm of the alarm generating unit 140, the operator can easily recognize whether or not the water in the oil tank 100 is higher than the upper limit reference value, and take a corresponding action. In other words, it is possible to prepare the basis of the application of Condition Based Inspection, which is performed according to the engine driving engine and the oil condition.

For reference, water coexists with most materials due to its absorption and adsorption properties by interacting with surrounding materials. Water present in the atmosphere in the form of water vapor is humidity, and water contained in liquids, solids, and gases other than air. Classify as moisture.

The maximum amount of water vapor in the atmosphere is said to be saturated. The steam pressure at this time is called saturated steam pressure, and the saturated steam pressure increases with increasing temperature. Humidity is the absolute humidity (weight of water vapor contained in 1㎥ of air in weight and the unit is g / ㎥) and relative humidity (% RH) of the amount of water vapor contained in the atmosphere and the amount of saturated water vapor at that temperature. When the temperature gradually decreases while the water vapor pressure is constant, water vapor saturates and condenses to form droplets at a certain point. This temperature is called dew point.

In addition, referring to FIG. 5, the water content unit used in the past is also used in parts per million (ppm), which indicates the water content of the solution to be measured as a percentage of the volume or weight of the solution. Water activity aw is the ratio between the water content (P) and the maximum water content (Po) currently contained under the same conditions, in units of 0 to 1, in units of aw = P / Po, where 0 is water content. Is 0 and 1 is water.

In particular, the water activity is mainly used when measuring the water content in the oil, for the following reasons. The water content saturation of oils has a different saturation point due to various reasons such as minerals and synthetic oils, main components and additives, emulsifiers and oxidants. Lubricants, for example, have two important variables. As the service life increases, the temperature fluctuations and chemical changes in the lubricant cause degradation, resulting in a decrease in the saturation point of water content as shown in the following figure. As it becomes close to water and becomes easy to become water, it is easy to identify dangerous situations such as causing various obstacles such as corrosion and abrasion to machinery such as engines.

As the real-time monitoring is made so that the moisture in the oil tank 100 does not occur above the upper limit value, for example, it is possible to prevent the moisture supplied with the oil into the diesel engine used in ships or automobiles.

The present invention has been illustrated and described with reference to certain preferred embodiments, but the present invention is not limited to the above embodiments and various changes and modifications are possible without departing from the technical spirit of the present invention.

100: oil tank 101: screw hole
110: measuring unit 111: detection sensor
113: sensor housing 114: threaded portion
115: cable 120: transmitter
130: receiver 131: display window
133: data processing unit 140: alarm generating unit

Claims (3)

A measuring unit 110 installed in the oil tank 100 for high temperature and high pressure and including a detection sensor 111 for measuring moisture content;
A transmitter 120 for outputting measurement data measured through the measurement unit 110;
A data processing unit for receiving the measurement data output from the transmitter 120 and displaying it on the display window 131 and comparing / determining whether or not the measurement data exceeds the upper limit reference value with reference to a preset upper limit reference value. Receiving unit 130, including 133; And
Alarm generation unit for generating an alarm alarm when the measurement data exceeds the upper limit reference value; Water content monitoring system of a high-temperature, high-pressure oil tank comprising a. The method of claim 1,
The detection sensor 111,
A rod-shaped sensor housing 113 on which one side is inserted into the oil tank 100 to measure moisture content contained in the received oil; And
And a threaded portion 114 formed to correspond to the outer circumference of the other side of the sensor housing 113 so that the sensor housing 113 can be fixedly installed in the threaded hole 101 formed through one side of the oil tank 100. The water content monitoring system of the oil tank for high temperature and high pressure, characterized in that made. The method of claim 2,
The sensor housing 113,
A water content monitoring system for an oil tank for high temperature and high pressure, wherein the measurement signal is not changed by external noise and the surface finish is made of stainless steel to prevent oil leakage.
KR1020110103447A 2011-10-11 2011-10-11 Monitoring system for moisture variation in the oil tank KR20130039025A (en)

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Application Number Priority Date Filing Date Title
KR1020110103447A KR20130039025A (en) 2011-10-11 2011-10-11 Monitoring system for moisture variation in the oil tank

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102178584B1 (en) * 2019-11-07 2020-11-13 현송콘트롤스 주식회사 Sensing and measurement assembly for viscosity control system of fuel oil using at vessel
KR102496454B1 (en) 2022-10-12 2023-02-06 이상수 System for managing coolant of cnc machine for machinng
CN117310133A (en) * 2023-11-01 2023-12-29 杭州咸亨校准检测技术有限公司 Steam turbine oil moisture detection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102178584B1 (en) * 2019-11-07 2020-11-13 현송콘트롤스 주식회사 Sensing and measurement assembly for viscosity control system of fuel oil using at vessel
KR102496454B1 (en) 2022-10-12 2023-02-06 이상수 System for managing coolant of cnc machine for machinng
CN117310133A (en) * 2023-11-01 2023-12-29 杭州咸亨校准检测技术有限公司 Steam turbine oil moisture detection device
CN117310133B (en) * 2023-11-01 2024-03-08 杭州咸亨校准检测技术有限公司 Steam turbine oil moisture detection device

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