CN116953038A - Ship main engine lubricating oil product analysis and monitoring method - Google Patents
Ship main engine lubricating oil product analysis and monitoring method Download PDFInfo
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- CN116953038A CN116953038A CN202310895790.3A CN202310895790A CN116953038A CN 116953038 A CN116953038 A CN 116953038A CN 202310895790 A CN202310895790 A CN 202310895790A CN 116953038 A CN116953038 A CN 116953038A
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- 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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Abstract
The invention discloses a ship main engine lubricating oil product analysis and monitoring method, which is used for monitoring and guaranteeing the quality of ship main engine lubricating oil; based on off-line detection and on-line detection, oil quality sensitive parameters and corresponding dielectric constants of a plurality of host lubricating oils of a ship are collected, a relation curve of the oil quality sensitive parameters and the dielectric constants based on the accumulated sailing time of the ship host is formed, an alarm threshold of the dielectric constants can be determined according to the ship age, the dielectric constants of the host lubricating oils are detected when the ship sails, and when the alarm threshold of the dielectric constants is reached, an alarm is given, so that the comprehensive, economical and timely performance is achieved, and the timeliness and the accuracy of ship safety monitoring are improved.
Description
Technical Field
The invention relates to a ship main engine lubricating oil product analysis and monitoring method which is used for monitoring and guaranteeing the quality of ship main engine lubricating oil.
Background
The ship main engine, namely a ship power device, is a machine for providing power for various ships. The main engine and its auxiliary equipment provide propulsion power for the ship, and are the heart of the whole ship. At present, the main engine mainly comprises five types of steam engines, steam turbines, diesel engines, gas turbines and nuclear power devices. The main engine of modern transport ship is mainly diesel engine, and is dominant in number. Steam engines have played an important role in the history of ship development, but are almost eliminated at present. Steam turbines have long been an advantage on high power vessels, but are increasingly being replaced by diesel engines. Gas turbines and nuclear power plants are only tried out for a few ships and have not been popularized yet. Lubrication is essential for any type of machinery on board the ship. In order to ensure stable operation of the marine main engine in a long-time and high-load state, the transmission parts of the marine main engine must be effectively lubricated for a long time. The lubrication system of the marine main engine is responsible for lubricating and cooling the transmission structure, thereby reducing friction and heat generated by friction and avoiding damage and overheating of parts. The lubrication system not only can provide cooling for the main machine, but also can remove scraps or impurities generated in the friction process of gears, shafting and the like. The marine lubricating oil is used for a lubricating system of a marine main engine, and has the characteristics of high bearing capacity, excellent thermal oxidation stability, enough total alkalinity for neutralizing acidic substances to prevent corrosion and abrasion, excellent cleaning and dispersing properties, water resistance, heat conductivity and the like. Therefore, the joint with high and low lubrication efficiency of the lubrication system is used for guaranteeing the health degree and the service life of the lubricating oil. At present, how to monitor the health degree and life of lubricating oil of a ship host is less studied, and the lubricating oil is often replaced regularly according to the service time of the lubricating oil and the range number of the ship, but the replacement mode easily causes the following problems: (1) When abnormal wear occurs to the ship main engine transmission system due to mechanical faults and the like, a large amount of heat and metal scraps can be generated, so that the health degree of the lubricating oil is reduced rapidly, the main engine wear can be further accelerated, at the moment, the lubricating oil can not be actively replaced because the lubricating oil does not reach the preset lubricating oil replacement time, the ship main engine can be kept in a high-loss running state continuously, the transmission efficiency is reduced, the oil consumption is increased, and even the ship main engine is damaged. (2) When the lubricating oil is in high health degree, the lubricating oil is replaced due to the fact that the preset lubricating oil replacement time is reached, so that the lubricating oil is wasted, meanwhile, the maintenance frequency of the ship is increased, the operation time of the ship is shortened, and the economic efficiency of ship operation is insufficient over time.
It can be seen that whether the lubricating oil of the ship main engine is healthy is critical to the safe sailing and economic efficiency of the ship. An important means for ensuring the health of the lubricating oil of the ship main engine is to automatically monitor the lubricating oil. Therefore, an automatic and informative technical means is needed to assist the manager to automatically monitor, discover and prompt the problems in time. At present, the detection of lubricating oil is mainly divided into off-line detection and on-line detection.
The traditional offline method needs to sample and analyze, has high single detection cost, long detection period and great consumption of manpower, material resources and financial resources, and the analysis result has hysteresis and cannot reflect the lubrication running condition of the equipment in real time. In addition, the pollution invasion links in the test process are more, a great amount of information loss can be caused to the collected oil sample treatment, the problems of relatively large personal experience and level dependence of experiment operators and the like are solved, the early diagnosis and prevention of mechanical system faults are not facilitated, the on-site use is not facilitated, and the problems can be overcome by adopting the on-line detection. The online lubricating oil monitoring is a one-door monitoring technology for effectively and timely avoiding accidents by continuously and uninterruptedly monitoring physical and chemical, pollution and wear performance parameters of the used oil through an online sensor of the system or equipment under the condition that the system or equipment does not stop working, judging or predicting the operation condition and state of the system or equipment according to the constant change of the monitored oil parameters, diagnosing abnormal parts of the system or equipment and providing basis for developing targeted maintenance and repair. However, since the online monitoring technology requires a large number of high-precision sensors and processing systems to be additionally arranged everywhere on the ship body, the online monitoring technology is high in price, high in maintenance cost and troublesome in maintenance. Once an abnormal value occurs, whether the abnormal value is caused by damage of a sensor or the actual abnormal value is measured cannot be judged, the measurable parameter is limited, related data cannot be covered on the whole, the measurement accuracy is limited, false alarm is easy to occur, unnecessary maintenance is caused, and economic benefit is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a ship main engine lubricating oil product analysis and monitoring method, which comprises the following steps:
s1, determining a mother ship, and selecting oil quality sensitive parameters of a plurality of host lubricating oils;
the method comprises the following specific steps: selecting the ship age as T 1 Is used as a mother ship to determine oil quality sensitive parameters M of a plurality of main engine lubricating oils 1 ……M n The oil quality sensitive parameters can be water content, abrasive grain content, viscosity, temperature and the like;
s2, measuring and obtaining a relation curve of the oil quality sensitive parameter and the dielectric constant K based on the accumulated sailing time of the ship host; the step S2 comprises the following steps S21-S22; wherein,,
s21: sampling the main engine lubricating oil every certain time t in the accumulated sailing time of the main engine of the ship after the new main engine lubricating oil is replaced, and performing off-line detection to obtain oil quality sensitive parameters M at different moments 1 And dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 1 Relation to dielectric constant K curve L 1 ；
S22: oil quality sensitivity parameter M for different host lubricating oils 2 ……M n The step S21 is adopted to obtain the oil quality sensitive parameters M at different moments 2 ……M n And the corresponding dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 2 ……M n Relation L with the corresponding dielectric constant K 2 ……L n ；
S3, obtaining an alarm threshold value of the dielectric constant according to the alarm threshold value of the oil quality sensitive parameter;
the method comprises the following specific steps: presetting a plurality of oil quality sensitive parameters M of the host lubricating oil according to the replacement requirement of the host lubricating oil 1 ……M n Is M A1 ……M An And is T according to the age of the ship 1 The relation curve L of the oil quality sensitive parameter M and the dielectric constant K of the ship based on the accumulated navigation time of the ship main engine 1 ……L n Respectively obtaining the quality sensitive parameters M of the oil products 1 ……M n Alarm threshold K for different dielectric constants of (a) A1 ……K An The method comprises the steps of carrying out a first treatment on the surface of the And from K A1 ……K An The boundary value is selected as an alarm threshold K of dielectric constant A The boundary value is the minimum value;
s4, replacing ships with different ages to obtain curves of alarm threshold values of dielectric constants of the ships with different ages;
the method comprises the following specific steps: changing the ship age to be T 2 ……T n Repeating the steps S1 to S3 respectively to obtain the ship with the age of T 2 ……T n Alarming threshold K of dielectric constant corresponding to ship A2 ……K An The method comprises the steps of carrying out a first treatment on the surface of the Obtaining a curve P of alarm threshold values of dielectric constants corresponding to different ages of ships;
s5, determining an alarm threshold value of the dielectric constant according to the ship age, detecting the dielectric constant of the host lubricating oil when the ship sails, and sending out an alarm when the dielectric constant reaches the alarm threshold value of the dielectric constant;
the method comprises the following specific steps: determining the ship age T of the ship, and obtaining the alarm threshold K of the dielectric constant of the ship with the ship age T according to the corresponding relation between the ship age T of the ship and the curve P of the alarm threshold of the dielectric constant corresponding to different ship ages A The dielectric constant K of the host lubricating oil is monitored on line by arranging an oil dielectric constant sensor on the ship, and when the dielectric constant K reaches an alarm threshold K of the dielectric constant A When the system sends out an alarm, the main engine lubricating oil is prompted to be replaced.
Compared with the prior art, the invention has the beneficial effects that:
(1) Because the abrasion degrees of the main engines of different ages are different, the invention obtains the curve P of the alarm threshold value of the dielectric constant corresponding to the different ages by testing the mother ships of different ages, can simply obtain the alarm threshold value of the dielectric constant corresponding to the different ages by the curve P, and is convenient for monitoring the dielectric constant of the main engine lubricating oil.
(2) The invention combines the advantages of off-line detection and on-line detection, so that the detection of the oil product of the main machine lubricating oil is simpler, the cost is low, and the detection result is accurate. The defects of high price and poor timeliness of offline detection are overcome, and the defects of high cost, high maintenance cost and troublesome maintenance of a large number of expensive high-precision sensors required to be arranged in online detection are overcome. So that the host lube oil can be detected by simply measuring the dielectric constant.
(3) The invention can perform unified measurement on different ages of the same ship, is particularly suitable for the ship types of unified and large in number, such as public service ships, sea supervision ships and the like, so that the curve of the alarming threshold of the dielectric constant of the similar ships is obtained through early-stage tests, and has good suitability.
Drawings
FIG. 1 is a schematic diagram of a method for analyzing and monitoring lubricating oil products of a marine main engine according to the present invention.
Description of the embodiments
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to fig. 1, the invention provides a ship main engine lubricating oil product analysis and monitoring method, which comprises the following steps:
s1, determining a mother ship, and selecting oil quality sensitive parameters of a plurality of host lubricating oils;
the method comprises the following specific steps: selecting the ship age as T 1 Is used as a mother ship to determine oil quality sensitive parameters M of a plurality of main engine lubricating oils 1 ……M n The oil quality sensitive parameters can be water content, abrasive grain content, viscosity, temperature and the like;
s2, measuring and obtaining a relation curve of the oil quality sensitive parameter and the dielectric constant K based on the accumulated sailing time of the ship host; the step S2 comprises the following steps S21-S22; wherein,,
s21: sampling the main engine lubricating oil every certain time t in the accumulated sailing time of the main engine of the ship after the new main engine lubricating oil is replaced, and performing off-line detection to obtain oil quality sensitive parameters M at different moments 1 And dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 1 Relation to dielectric constant K curve L 1 ；
S22: oil quality sensitivity parameter M for different host lubricating oils 2 ……M n The step S21 is adopted to obtain the oil quality sensitive parameters M at different moments 2 ……M n And the corresponding dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 2 ……M n Relation L with the corresponding dielectric constant K 2 ……L n ；
S3, obtaining an alarm threshold value of the dielectric constant according to the alarm threshold value of the oil quality sensitive parameter;
the method comprises the following specific steps: presetting a plurality of oil quality sensitive parameters M of the host lubricating oil according to the replacement requirement of the host lubricating oil 1 ……M n Is M A1 ……M An And is T according to the age of the ship 1 The relation curve L of the oil quality sensitive parameter M and the dielectric constant K of the ship based on the accumulated navigation time of the ship main engine 1 ……L n Respectively obtaining the quality sensitive parameters M of the oil products 1 ……M n Alarm threshold K for different dielectric constants of (a) A1 ……K An The method comprises the steps of carrying out a first treatment on the surface of the And from K A1 ……K An The boundary value is selected as an alarm threshold K of dielectric constant A The boundary value is the minimum value;
s4, replacing ships with different ages to obtain curves of alarm threshold values of dielectric constants of the ships with different ages;
the method comprises the following specific steps: changing the ship age to be T 2 ……T n Repeating the steps S1 to S3 respectively to obtain the ship with the age of T 2 ……T n Alarming threshold K of dielectric constant corresponding to ship A2 ……K An The method comprises the steps of carrying out a first treatment on the surface of the Obtaining a curve P of alarm threshold values of dielectric constants corresponding to different ages of ships;
s5, determining an alarm threshold value of the dielectric constant according to the ship age, detecting the dielectric constant of the host lubricating oil when the ship sails, and sending out an alarm when the dielectric constant reaches the alarm threshold value of the dielectric constant;
the method comprises the following specific steps: determining the ship age T of the ship, and obtaining the alarm threshold K of the dielectric constant of the ship with the ship age T according to the corresponding relation between the ship age T of the ship and the curve P of the alarm threshold of the dielectric constant corresponding to different ship ages A The dielectric constant K of the host lubricating oil is monitored on line by arranging an oil dielectric constant sensor on the ship, and when the dielectric constant K reaches an alarm threshold K of the dielectric constant A When the system sends out an alarm, the main engine lubricating oil is prompted to be replaced.
When in actual use, the invention has the following technical effects: because the abrasion degrees of the main engines of different ages are different, the invention obtains the curve P of the alarm threshold value of the dielectric constant corresponding to the different ages by testing the mother ships of different ages, can simply obtain the alarm threshold value of the dielectric constant corresponding to the different ages by the curve P, and is convenient for monitoring the dielectric constant of the main engine lubricating oil. The invention combines the advantages of off-line detection and on-line detection, so that the detection of the oil product of the main machine lubricating oil is simpler, the cost is low, and the detection result is accurate. The defects of high price and poor timeliness of offline detection are overcome, and the defects of high cost, high maintenance cost and troublesome maintenance of a large number of expensive high-precision sensors required to be arranged in online detection are overcome. So that the host lube oil can be detected by simply measuring the dielectric constant. The invention can perform unified measurement on different ages of the same ship, is particularly suitable for the ship types of unified and large in number, such as public service ships, sea supervision ships and the like, so that the curve of the alarming threshold of the dielectric constant of the similar ships is obtained through early-stage tests, and has good suitability.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The ship main engine lubricating oil product analysis and monitoring method is characterized by comprising the following steps of:
s1, determining a mother ship, and selecting oil quality sensitive parameters of a plurality of host lubricating oils;
s2, measuring and obtaining a relation curve of the oil quality sensitive parameter and the dielectric constant K based on the accumulated sailing time of the ship host;
s3, obtaining an alarm threshold value of the dielectric constant according to the alarm threshold value of the oil quality sensitive parameter;
s4, replacing ships with different ages to obtain curves of alarm threshold values of dielectric constants of the ships with different ages;
s5, determining an alarm threshold value of the dielectric constant according to the ship age, detecting the dielectric constant of the host lubricating oil when the ship sails, and sending out an alarm when the dielectric constant reaches the alarm threshold value of the dielectric constant.
2. The method for analyzing and monitoring the lubricating oil product of the marine main engine according to claim 1, which is characterized by comprising the following steps: the step S1 specifically comprises the following steps: selecting the ship age as T 1 Is used as a mother ship to determine oil quality sensitive parameters M of a plurality of main engine lubricating oils 1 ……M n 。
3. The method for analyzing and monitoring the lubricating oil product of the marine main engine according to claim 2, which is characterized by comprising the following steps: the step S2 specifically comprises the following steps: it also includes the following steps S21-S22; wherein,,
s21: sampling the main engine lubricating oil every certain time t in the accumulated sailing time of the main engine of the ship after the new main engine lubricating oil is replaced, and performing off-line detection to obtain oil quality sensitive parameters M at different moments 1 And dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 1 Relation to dielectric constant K curve L 1 ；
S22: oil quality sensitivity parameter M for different host lubricating oils 2 ……M n The step S21 is adopted to obtain the oil quality sensitive parameters M at different moments 2 ……M n And the corresponding dielectric constant K, and obtaining the ship age T after multiple measurements 1 Oil quality sensitive parameter M of ship based on ship main engine accumulated navigation time 2 ……M n Relation L with the corresponding dielectric constant K 2 ……L n 。
4. The method for analyzing and monitoring the lubricating oil product of the marine main engine according to claim 3, wherein the method comprises the following steps of: the step S3 specifically comprises the following steps: presetting a plurality of oil quality sensitive parameters M of the host lubricating oil according to the replacement requirement of the host lubricating oil 1 ……M n Is M A1 ……M An And is T according to the age of the ship 1 The relation curve L of the oil quality sensitive parameter M and the dielectric constant K of the ship based on the accumulated navigation time of the ship main engine 1 ……L n Respectively obtaining the quality sensitive parameters M of the oil products 1 ……M n Alarm threshold K for different dielectric constants of (a) A1 ……K An The method comprises the steps of carrying out a first treatment on the surface of the And from K A1 ……K An The boundary value is selected as an alarm threshold K of dielectric constant A The boundary value is the minimum value.
5. The marine main engine lubricating oil product according to claim 4The analysis and monitoring method is characterized in that: the step S4 specifically includes: changing the ship age to be T 2 ……T n Repeating the steps S1 to S3 respectively to obtain the ship with the age of T 2 ……T n Alarming threshold K of dielectric constant corresponding to ship A2 ……K An The method comprises the steps of carrying out a first treatment on the surface of the And obtaining a curve P of alarm threshold values of dielectric constants corresponding to different ages of ships.
6. The method for analyzing and monitoring the lubricating oil product of the marine main engine according to claim 5, which is characterized in that: the step S5 specifically comprises the following steps: determining the ship age T of the ship, and obtaining the alarm threshold K of the dielectric constant of the ship with the ship age T according to the corresponding relation between the ship age T of the ship and the curve P of the alarm threshold of the dielectric constant corresponding to different ship ages A The dielectric constant K of the host lubricating oil is monitored on line by arranging an oil dielectric constant sensor on the ship, and when the dielectric constant K reaches an alarm threshold K of the dielectric constant A When the system sends out an alarm, the main engine lubricating oil is prompted to be replaced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310895790.3A CN116953038A (en) | 2023-07-20 | 2023-07-20 | Ship main engine lubricating oil product analysis and monitoring method |
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| CN202310895790.3A CN116953038A (en) | 2023-07-20 | 2023-07-20 | Ship main engine lubricating oil product analysis and monitoring method |
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| CN202310895790.3A Pending CN116953038A (en) | 2023-07-20 | 2023-07-20 | Ship main engine lubricating oil product analysis and monitoring method |
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