CN109307553B - Main bearing maintenance prompting method based on main bearing temperature deviation - Google Patents
Main bearing maintenance prompting method based on main bearing temperature deviation Download PDFInfo
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- CN109307553B CN109307553B CN201811133343.XA CN201811133343A CN109307553B CN 109307553 B CN109307553 B CN 109307553B CN 201811133343 A CN201811133343 A CN 201811133343A CN 109307553 B CN109307553 B CN 109307553B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/10—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
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Abstract
The invention discloses a main bearing overhaul prompting method based on main bearing temperature deviation, which comprises the following steps of: detecting the temperature of a main bearing corresponding to each air cylinder in real time, and calculating the average value of the temperatures of the main bearings corresponding to the rest air cylinders and the temperature deviation of the main bearing of the X air cylinder; when the engine is in an operating state and the temperature deviation of the X cylinder main bearing is larger than or equal to a preset prompt value, a first timer starts to time, and if the continuous timing time of the first timer reaches a first preset time, a prompt of 'please overhaul the X cylinder main bearing' is given; if the temperature deviation of the X cylinder main bearing is smaller than a preset prompt value within the timing time of the first timer, the second timer starts timing, and if the continuous timing time of the second timer reaches a second preset time, the first timer is set to zero without prompting for maintenance. The invention can prompt the user to overhaul the engine in advance before the fault alarm occurs so as to reduce the risk of the engine fault.
Description
Technical Field
The invention belongs to the technical field of engine part maintenance methods, and particularly relates to a prompt method for main bearing maintenance based on main bearing temperature deviation.
Background
An Engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, diesel engines, etc.), external combustion engines (stirling engines, steam engines, etc.), electric motors, etc. In the practical use of the engine, various critical values are often set as alarm parameters for fault alarm prompt so as to reduce the risk of the engine fault.
For example, each cylinder in the engine corresponds to the same main bearing temperature alarm value D, and only when the main bearing temperature of the X cylinder is larger than the set alarm value D, the control system can output an alarm prompt. The main bearing is a bearing used for supporting a main journal of a crankshaft and is positioned between a main bearing seat and the crankshaft, the bearing is generally made into a split structure, and the two split halves are similar to tiles, so the bearing is also called as a bearing bush; the main bearing temperature is the temperature measured by the probe of the main bearing temperature sensor through the main bearing seat to contact the main bearing. Particularly, for a high-power engine, in the operating process of the engine, once an alarm condition occurs due to the fact that the temperature of a certain X cylinder main bearing is high, the temperature of the main bearing at the position of the X cylinder is high, and the main bearing at the position is possibly poor in lubrication, serious friction exists between the main bearing and a crankshaft and the like, and therefore the engine needs to be immediately shut down for maintenance, but the engine cannot be shut down for maintenance in time under most conditions.
Particularly, for ships matched with a single engine, the ships can be overhauled only when the ships are in a harbor or the ships are parked without heavy wind and waves. The engine with the alarm function and the high temperature of the main bearing can damage the main bearing or a main journal of a crankshaft, and can still be used in a running mode, but the longer the service life is, the greater the influence on the performance of the engine is, and emergency stop can be triggered under severe conditions. Therefore, before fault alarm occurs, a user is prompted to select proper time in advance to overhaul the main bearing of the engine, and the method is very necessary.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problem of providing a main bearing maintenance prompting method based on the temperature deviation of a main bearing, and the method is used for prompting a user to select a proper time to maintain an engine in advance before a fault alarm occurs so as to reduce the risk of the engine failing.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a main bearing overhauls suggestion method based on main bearing temperature deviation for before fault alarm takes place, the suggestion user carries out engine main bearing in advance and overhauls, and the cylinder has a plurality ofly, and every cylinder corresponds a main bearing, and the main bearing overhauls suggestion method includes following step:
s1, detecting the temperature of the main bearing corresponding to each cylinder in real time;
s2, calculating the average value of the main bearing temperatures corresponding to other residual air cylinders except the main bearing temperature corresponding to any air cylinder X, and calculating the average value of the main bearing temperatures of the other air cylinders; calculating the difference value between the main bearing temperature corresponding to any cylinder X and the average value of the main shaft temperatures of the rest cylinders, and calculating the difference value as the main bearing temperature deviation of the X cylinder;
s3, judging whether the engine is in a running state;
s4, if the engine is in a running state and the temperature deviation of the X cylinder main bearing is larger than or equal to a preset prompt value, starting timing by a first timer, and if the continuous timing time of the first timer reaches a first preset time, prompting that the X cylinder main bearing is required to be repaired; if the temperature deviation of the X cylinder main bearing is smaller than the preset prompt value within the timing time of the first timer, the second timer starts timing, and if the continuous timing time of the second timer reaches second preset time, the first timer is set to zero without prompting for maintenance.
In the above technical solution, preferably, the step S4 specifically includes the following steps:
s41, judging whether the temperature deviation of the main bearing of the X cylinder is larger than or equal to the preset prompt value or not; if yes, the first timer starts to count time, and the process proceeds to step S42; if not, returning to the step S3;
s42, judging whether the temperature deviation of the X cylinder main bearing is larger than or equal to the preset prompt value again; if not, the second timer starts to count time, and the process goes to step S43; if yes, go directly to step S46;
s43, judging whether the temperature deviation of the X cylinder main bearing is larger than or equal to the preset prompt value again; if yes, the second timer is set to zero, and the step S42 is returned to; if not, go to step S44;
s44, judging whether the duration time of the second timer reaches the second preset time or not; if not, returning to the step S43; if yes, go to step S45;
s45, setting the first timer to zero, directly returning to the step S3, and entering the next round of circulation;
s46, judging whether the duration time of the first timer reaches the first preset time or not; if not, returning to the step S42; if yes, go to step S47;
and S47, prompting that the main bearing of the X cylinder needs to be overhauled.
In the above technical scheme, preferably, the first preset time is 3600s, the second preset time is 20s, and the preset prompt value is 5-10 ℃.
In the above technical solution, preferably, the engine is a marine diesel engine.
In the above technical solution, preferably, the prompt message "please overhaul the X cylinder main bearing" is displayed through a display screen.
After the technical scheme is adopted, the invention has the beneficial effects that:
if the engine is in an operating state and the temperature deviation of the X cylinder main bearing is larger than or equal to a preset prompt value, a first timer starts to time, and if the continuous timing time of the first timer reaches a first preset time, a prompt of 'please overhaul the X cylinder main bearing' is given; if the temperature deviation RX of the main bearing of the X cylinder is smaller than a preset prompt value within the timing time of the first timer, the second timer starts timing, and if the continuous timing time of the second timer reaches a second preset time, the first timer is set to zero without prompting for maintenance. The invention can prompt the user to overhaul in advance before the fault alarm occurs, thereby improving the intellectualization of the starting control system and the flexibility of selecting the shutdown overhaul time by the user, and simultaneously reducing the risk of the engine failure.
The main bearing overhaul prompting method provided by the invention is simple and easy to implement, does not need to additionally increase hardware configuration, does not greatly increase the power consumption of an engine control system, and is particularly suitable for marine diesel engines.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of a main bearing overhaul prompting method based on main bearing temperature deviation according to the invention;
FIG. 2 is a flowchart of an embodiment of a main bearing overhaul prompting method based on main bearing temperature deviation.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in figure 1, the main bearing overhaul prompting method based on the main bearing temperature deviation is used for prompting a user to overhaul a main bearing of an engine in advance before a fault alarm occurs, a plurality of cylinders are provided, and each cylinder corresponds to one main bearing, and comprises the following steps:
s1, detecting the temperature of a main bearing corresponding to each cylinder in real time by a main bearing temperature sensor; and uploading the temperature of the main bearing corresponding to each air cylinder detected in real time to an Electronic Control Unit (ECU) of the engine.
S2, after receiving the temperature signal transmitted by the main bearing temperature sensor, the ECU calculates the average value of the main bearing temperatures corresponding to other residual air cylinders except the main bearing temperature (TEx) corresponding to any air cylinder X, and calculates the average value of the main bearing temperatures corresponding to other air cylinders as the main shaft temperature average value (TMx) of the other air cylinders; and calculating the difference value of the main bearing temperature (TEx) of any cylinder X and the average value (TMx) of the main shaft temperatures of the other cylinders, and calculating the difference value as the main bearing temperature deviation of the X cylinder.
And S3, judging whether the engine is in a running state by the engine electronic control unit ECU.
S4, if the engine is in a running state and the temperature deviation of the X cylinder main bearing is larger than or equal to a preset prompt value, a first timer starts to time, and if the continuous timing time of the first timer reaches a first preset time, a prompt of 'please overhaul the X cylinder main bearing' is given; if the temperature deviation of the main bearing of the X cylinder is smaller than a preset prompt value within the timing time of the first timer, the second timer starts timing, and if the continuous timing time of the second timer reaches a second preset time, the first timer is set to zero without prompting for maintenance; and enters the next round of cycle control.
Wherein:
the engine control system mainly comprises an engine electronic control unit ECU (the interior of the engine electronic control unit ECU comprises an input/output channel, a storage position, a timer, a serial interface and the like), a sensor and an actuator. Various sensors collect signals required by a control system, convert the signals into electric signals and transmit the electric signals to an engine electronic control unit ECU through a circuit; an engine electronic control unit ECU provides reference (reference) voltage for each sensor, receives electric signals input by the sensors or other devices, stores, calculates, judges and analyzes the received signals and then sends instructions to an actuator; the actuator is a device which is controlled by an engine electronic control unit ECU and specifically executes a certain control function.
In this embodiment, the touch screen is used to display the fault information, or an ordinary display screen may be used to display the fault information. The electrical connection relationship between each sensor, actuator and the engine electronic control unit ECU and the internal structure of the engine electronic control unit ECU are well known to those skilled in the art and are not described herein.
The first preset time, the second preset time and the numerical value of the preset prompt value can be preset in an engine electronic control unit ECU according to actual conditions.
In this embodiment, step S3 and step S4 in the method for prompting overhaul of a main bearing of the present invention are described in detail by taking the first preset time as 3600S, the second preset time as 20S, and the preset prompt value as 7 ℃. These specific values are merely exemplary, and not only these values are applicable, and for example, the preset hint value may be any value from 5 ℃ to 10 ℃.
As shown in fig. 2, the specific steps are as follows:
s3, the engine electronic control unit ECU judges whether the engine is in a running state or not based on signals transmitted by various sensors (such as a rotating speed sensor), if so, the step S41 is executed;
s41, the engine electronic control unit ECU judges whether the temperature deviation of the main bearing of the X cylinder is more than or equal to 7 ℃ (namely TEx is more than or equal to TMx +7 ℃).
If yes, the engine electronic control unit ECU starts a first timer, starts timing by the first timer, and proceeds to step S42.
If not, the process returns to step S3.
S42, the engine electronic control unit ECU judges whether the temperature deviation of the main bearing of the X cylinder is more than or equal to 7 ℃ again (namely TEx is more than or equal to TMx +7 ℃).
If not, the engine electronic control unit ECU starts the second timer, starts timing by the second timer, and proceeds to step S43.
If yes, the process proceeds directly to step S46.
S43, the engine electronic control unit ECU judges whether the temperature deviation of the main bearing of the X cylinder is more than or equal to 7 ℃ again (namely TEx is more than or equal to TMx +7 ℃).
If yes, the engine electronic control unit ECU controls the second timer to be set to zero, and returns to step S42.
If not, the process proceeds to step S44.
And S44, the engine electronic control unit ECU judges whether the second timer is finished, namely whether the duration time of the second timer reaches the second preset time 20S.
If not, the process returns to step S43.
If yes, the process proceeds to step S45.
And S45, controlling the first timer to be set to zero by the ECU of the engine, directly returning to the step S3, and entering the next round of circulation.
And S46, the engine electronic control unit ECU judges whether the first timer is finished, namely whether the duration time of the first timer reaches a first preset time 3600S.
If not, the process returns to step S42.
If yes, the process proceeds to step S47.
S47, displaying ' please overhaul the main bearing of the X cylinder ' on the touch screen '.
According to the main bearing maintenance prompting method, additional hardware configuration is not needed, only the logic judgment program and the reference parameters are needed to be set in the engine electronic control unit ECU, the logic judgment program is clear and simple and feasible, and the power consumption of the engine control system cannot be greatly increased. The main bearing maintenance prompting method is particularly suitable for high-power marine diesel engines, can prompt users to maintain in advance before fault alarming occurs, improves the intelligence of an engine control system and the flexibility of selecting shutdown maintenance time by the users, and reduces the risk of engine failure.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made. Any modification and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. Main bearing overhauls suggestion method based on main bearing temperature deviation for before fault alarm takes place, the suggestion user carries out the main bearing of engine and overhauls in advance, and the cylinder has a plurality ofly, and every cylinder corresponds a main bearing, its characterized in that includes following step:
s1, detecting the temperature of the main bearing corresponding to each cylinder in real time;
s2, calculating the average value of the main bearing temperatures corresponding to other residual air cylinders except the main bearing temperature corresponding to any air cylinder X, and calculating the average value of the main bearing temperatures of the other air cylinders; calculating the difference value between the main bearing temperature corresponding to any cylinder X and the average value of the main shaft temperatures of the rest cylinders, and calculating the difference value as the main bearing temperature deviation of the X cylinder;
s3, judging whether the engine is in a running state;
s4, if the engine is in a running state and the temperature deviation of the X cylinder main bearing is larger than or equal to a preset prompt value, starting timing by a first timer, and if the continuous timing time of the first timer reaches a first preset time, prompting that the X cylinder main bearing is required to be repaired; if the temperature deviation of the X cylinder main bearing is smaller than the preset prompt value within the timing time of the first timer, a second timer starts timing, and if the continuous timing time of the second timer reaches a second preset time, the first timer is set to zero without prompting for maintenance;
step S4 specifically includes the following steps:
s41, judging whether the temperature deviation of the main bearing of the X cylinder is larger than or equal to the preset prompt value or not; if yes, the first timer starts to count time, and the process proceeds to step S42; if not, returning to the step S3;
s42, judging whether the temperature deviation of the X cylinder main bearing is larger than or equal to the preset prompt value again; if not, the second timer starts to count time, and the process goes to step S43; if yes, go directly to step S46;
s43, judging whether the temperature deviation of the X cylinder main bearing is larger than or equal to the preset prompt value again; if yes, the second timer is set to zero, and the step S42 is returned to; if not, go to step S44;
s44, judging whether the duration time of the second timer reaches the second preset time or not; if not, returning to the step S43; if yes, go to step S45;
s45, setting the first timer to zero, directly returning to the step S3, and entering the next round of circulation;
s46, judging whether the duration time of the first timer reaches the first preset time or not; if not, returning to the step S42; if yes, go to step S47;
and S47, prompting that the main bearing of the X cylinder needs to be overhauled.
2. The main bearing service reminding method based on the main bearing temperature deviation as claimed in claim 1, wherein the first preset time is 3600s, the second preset time is 20s, and the preset reminding value is 5-10 ℃.
3. The method for indicating main bearing service based on main bearing temperature deviation according to claim 1, wherein the engine is a marine diesel engine.
4. The main bearing overhaul prompting method based on the main bearing temperature deviation as claimed in claim 1, wherein the prompting message "please overhaul the X cylinder main bearing" is displayed through a display screen.
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| CN110501160B (en) * | 2019-07-31 | 2021-07-02 | 中国神华能源股份有限公司神朔铁路分公司 | Train bearing fault early warning method, device, system and storage medium |
| CN110748414B (en) * | 2019-09-20 | 2021-01-15 | 潍柴动力股份有限公司 | Method for judging failure of temperature sensor of main bearing of engine and failure judging system |
| CN111230571B (en) * | 2020-02-19 | 2021-11-05 | 名客(山东)智能制造有限公司 | Circulating cooling device and method for machining |
| CN115145328B (en) * | 2022-09-01 | 2022-11-15 | 安徽南瑞中天电力电子有限公司 | Temperature control method of I-type concentrator and I-type concentrator |
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| JP2004514097A (en) * | 2000-11-15 | 2004-05-13 | フェデラル−モーグル コーポレイション | Unplated aluminum-based bearing alloy with an intermediate layer with improved performance |
| CN102156043B (en) * | 2010-12-31 | 2013-01-16 | 北京四方继保自动化股份有限公司 | Online state monitoring and fault diagnosis system of wind generator set |
| CN106368816B (en) * | 2016-10-27 | 2018-09-25 | 中国船舶工业系统工程研究院 | A kind of online method for detecting abnormality of marine low speed diesel engine based on baseline offset |
| CN106870297B (en) * | 2017-02-10 | 2019-01-08 | 国电联合动力技术有限公司 | A method of failure is held based on Time Series Clustering diagnosis wind driven generator principal shaft |
| CN107977508A (en) * | 2017-11-29 | 2018-05-01 | 北京优利康达科技股份有限公司 | A kind of dynamo bearing failure prediction method |
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| CN1473238A (en) * | 2001-08-29 | 2004-02-04 | ��к������ʽ���� | Engine, engine exhaust temperature controlling device and controlling method |
| CN106574651A (en) * | 2014-08-21 | 2017-04-19 | 日产自动车株式会社 | Crank shaft bearing structure of internal combustion engine |
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