CN115774405A - Digital twinning-based lubricating oil system debugging method - Google Patents
Digital twinning-based lubricating oil system debugging method Download PDFInfo
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Abstract
The invention discloses a digital twin-based lubricating oil system debugging method, which comprises the following steps of: 1) Establishing a simulation model of the lubricating oil system and the equipment by defining a lubricating oil system equipment model library; 2) The online model receives real-time operation data of the real-time lubricating oil system acquired by the sensor in real time, transmits the online measured data to the simulation model to drive simulation calculation, and transmits the calculation result to the demonstration model for simulation animation display; 3) According to the flow requirements of the lubricating oil users under different preset working conditions, based on virtual-real fusion simulation, the action parameters of each actuating mechanism of the lubricating oil system are set and calculated through an offline model and are transmitted to a control system as virtual debugging signals; 4) And the physical lubricating oil system receives the control signal of the control system to adjust and control the operation of the physical lubricating oil system. The method can be used for efficient debugging, accurate analysis and virtual verification of a physical system by constructing a high-precision lubricating oil system model and adopting a digital twin-based lubricating oil system virtual debugging technology.
Description
Technical Field
The invention relates to a digital twinning technology, in particular to a lubricating oil system debugging method based on digital twinning.
Background
The requirement of a lubricating oil system in a power system ensures the oil consumption requirements of a plurality of lubricating oil users with different oil consumption characteristics under a plurality of working conditions. Meanwhile, the required lubricating oil amount of each user of the lubricating oil system in the propulsion steam turbine set accounts for a very large (80%) proportion, and the change of the lubricating oil flow of the propulsion steam turbine set in the process of variable working conditions can generate great interference on other oil using equipment. The device is limited by the characteristics of lubricating oil users of a novel power system, and the device ensures that the oil mass and the oil pressure of each user are input under variable working conditions, so that the efficiency of the physical test process of the lubricating oil system is low, the cost is high, and the period is long.
Meanwhile, the measuring points of the real ship lubricating oil system are limited, a flowmeter is not generally arranged, and the lubricating oil inlet pressure is only used as a debugging basis in the debugging process, so that the information acquisition of debugging personnel is limited, and the method is also one of the reasons for lower debugging efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a digital twin-based lubricating oil system debugging method aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a digital twinning-based lubricating oil system debugging method comprises the following steps:
1) Establishing a simulation model of the lubricating oil system and the equipment by defining a lubricating oil system equipment model library; the simulation models of the lubricating oil system and the equipment comprise an online model and an offline model;
2) The online model receives real-time operation data of the real-time lubricating oil system acquired by the sensor in real time, transmits the online measured data to the simulation model to drive simulation calculation, and transmits the calculation result to the demonstration model for simulation animation display; demonstration model and material object system 1: similarly, associating the equipment model with the system model data in a numerical value form to display the real object state and the key parameter information;
the real-time operating data comprises: measuring signal parameters of a lubricating oil system and controlling signal parameters of the lubricating oil system;
the lubricating oil system control signals comprise valve opening signals and pump rotating speed signals;
3) According to the flow requirements of the lubricating oil user under different preset working conditions, based on virtual-real fusion simulation, the action parameters of each actuating mechanism of the lubricating oil system are set and calculated in advance through an offline model and are transmitted to a control system as virtual debugging signals; the action parameters include: the rotation speed of the electric lubricating oil pump and the opening degree of each regulating valve;
the method specifically comprises the following steps of setting and calculating the action parameters of each actuating mechanism of the lubricating oil system in advance through an offline model:
3.1 According to the flow of each lubricating oil user, calculating the parameters of the branch regulating valve so that the flow of each lubricating oil user meets the requirements;
3.2 According to the target value of the pressure of the main lubricating oil pipe, the rotating speed of the electric lubricating oil pump and the opening of the main pipe pressure regulating valve are calculated so that the pressure of the main lubricating oil pipe meets the requirement;
3.3 Iteration 3.1 and 3.2 steps to ensure that the flow of each lubricating oil user and the pressure of a lubricating oil main pipe meet the requirements, at the moment, the system is in a stable state, and the pressure and the flow of the lubricating oil main pipe are kept stable;
3.4 According to the flow of the lubricating oil main pipe obtained in the step 3.3), calculating the opening of a cooling water adjusting valve to obtain the flow of cooling water, so that the temperature of the lubricating oil passing through a cooler meets the requirements of each user;
4) And the physical lubricating oil system receives the control signal of the control system and adjusts and controls the physical lubricating oil system to operate.
According to the scheme, the step 1) adopts a unified multiple physical modeling language Modelica language for modeling, and the method specifically comprises the following steps:
an equipment simulation model including an oil tank, an oil pump, a motor, an overflow valve, a filter, a check valve, a heat exchanger, a heater, a regulating valve, an oil medium, a pipeline model and a control module is constructed based on the multi-physical-quantity unified modeling language Modelica, and an oil system model is constructed based on the equipment simulation model.
The invention has the following beneficial effects:
according to the invention, a high-precision lubricating oil system model is constructed, a digital twin-based lubricating oil system virtual debugging technology is adopted, the method has important significance in the aspects of fine debugging of a lubricating oil system, multi-objective optimization and comprehensive performance improvement of equipment/systems, partial test replacement and the like, and meanwhile, based on the digital twin, the cooperative interaction of a real object system and a twin model is constructed, so that the full-state perception of the real object system is realized, and the method can be used for supporting key work such as efficient debugging, accurate analysis, virtual verification and the like of the real object system.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a schematic flow chart of the operation of the lubricating oil system according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, a digital twin-based lubricating oil system debugging method includes the following steps:
1) On the basis of a Modelica language, a lubricating oil system model (including an online model and an offline model) is constructed by defining a lubricating oil system equipment model base, and the lubricating oil system equipment model base and the system model check the model through test data to realize the accuracy of the model. The off-line model and the on-line model are digital twin bodies of the real object system.
Based on virtual-real fusion simulation, the off-line model calculates the action parameters (the rotating speed of the electric lubricating oil pump, the opening degree of the regulating valve and the like) of each actuating mechanism of the lubricating oil system in advance in a setting mode to serve as virtual debugging signals to be transmitted to the control system, and the operation and decision of a tester in the test process are guided. The online model receives data acquired by the real object system in real time, drives simulation calculation, and transmits a calculation result to the demonstration model for simulation animation display. And the physical system and the simulation model are combined to realize the full-state sensing and virtual debugging of the lubricating oil system and guide the operation and debugging of the physical test system.
The lubricating oil system consists of an electric lubricating oil pump, a magnetic filter, a main lubricating oil filter, a lubricating oil cooler, a circulating lubricating oil cabinet, a regulating valve and a lubricating oil user. The specific working flow of the lubricating oil system is shown in figure 2. The electric lubricating oil pump pumps out lubricating oil from the circulating lubricating oil cabinet, the lubricating oil is filtered by the magnetic filter and the main lubricating oil filter, the lubricating oil enters the cooler to be cooled, and the lubricating oil is distributed to various lubricating oil users through the lubricating oil main pipe.
The following parameters need to be adjusted during the debugging process of the lubricating oil system:
1) The rotating speed of the electric lubricating oil pump and the opening of the main pipe pressure regulating valve are regulated, so that the pressure of the lubricating oil main pipe meets the requirement.
2) Meanwhile, the lubricating oil regulating valve in front of the user needs to be regulated, so that the inlet pressure and flow of each lubricating oil user under 3 working conditions meet the requirements.
3) The cooling water flow is adjusted through the cooling water adjusting valve, so that the temperature of the lubricating oil passing through the cooler meets the requirements of various users.
According to the embodiment of the invention, the main equipment simulation models such as the lubricating oil cabinet, the lubricating oil pump, the motor, the overflow valve, the filter, the check valve, the heat exchanger, the heater, the regulating valve, the lubricating oil medium, the pipeline model and the control module are constructed based on the multi-physical-quantity unified modeling language Modelica, and the lubricating oil system model is constructed based on the equipment model, so that the multi-physical-quantity characteristics such as fluid, heat and control corresponding to the lubricating oil system can be effectively simulated. Through test data correction, the steady-state simulation error of the high-precision simulation model of the lubricating oil system established based on the Modelica modeling language is less than 5%, and the dynamic simulation error is less than 10%.
And constructing an off-line simulation model and an on-line simulation model based on the lubricating oil system equipment model library. The off-line model is used for real object control interaction and transmitting the working condition setting parameters to the control system. The online model is used for receiving the real-time data collected by the real object, driving simulation calculation, transmitting the calculation result to the demonstration model and displaying the simulation animation.
The data interface module and the simulation software are both deployed in the simulation machine, based on a Modbus/TCP protocol, the upper computer of the control system transmits the measuring point data of the physical system to the simulation machine, the data interface software in the simulation machine converts the Modbus/TCP protocol data into universal interface protocol data (based on UDP), and then the data is transmitted to the simulation software (an online simulation model).
And data in the simulation software (an off-line simulation model) is also transmitted to the data interface software based on a universal interface protocol (UDP), converted into Modbus/TCP data and finally transmitted to the upper computer of the control system.
2) Based on the virtual-real interaction, the online simulation model receives all measuring point signals of the control system in real time, including control signals (pump rotating speed and regulating valve opening degree) and measurement signals, extracts the control signals, drives the simulation model, and calculates simulation parameters. The two-dimensional and three-dimensional models display all information of the lubricating oil system by receiving the data of the online simulation model in real time and by real-time data interaction, realize the monitoring of the whole state of the lubricating oil system, grasp the running state of the system and assist the decision and judgment of testers. The two-dimensional and three-dimensional models can display all simulation data in real time, taking the three-dimensional model as an example:
three-dimensional demonstration model and material object system 1: similarly, the real object state and key parameter information can be displayed in detail. The three-dimensional demonstration model receives the calculation data from the simulation model in real time, drives the model to display real-time information, and associates the equipment model with the system model data in a numerical value form to display, and the specific effect function is as follows.
(1) Electric lubricating oil pump: rotational speed, discharge pressure, flow rate.
(2) A lubricating oil cooler: cooling water flow, lubricant inlet temperature, and lubricant outlet temperature.
(3) Adjusting a valve: opening, flow, differential pressure. And the default display pressure regulating valve automatically displays the state and the name of the regulating valve when different regulating valves are clicked.
When the main equipment is clicked, the simulation calculation information of the equipment can be displayed in real time. The displayed information includes:
a lubricating oil pump: rotation speed, discharge pressure, flow rate;
adjusting a valve: opening, pressure drop, flow rate;
oil tank, liquid level, temperature;
a lubricating oil cooler: cooling water flow, inlet temperature, outlet temperature; oil flow, inlet temperature, outlet temperature.
Dynamic effect of lubricating oil movement: the lubricating oil flowing effect in the three-dimensional model is related to the actual lubricating oil flow, the effect is stronger when the flow is larger, and the lubricating oil flowing effect is stopped when the lubricating oil flow is 0.
Color dynamic effects: the lubricant color is correlated to the lubricant temperature.
The oil tank animation effect: the liquid level and temperature effects of the lubricating oil tank are driven by simulation data in real time.
All state parameter displays can be added or changed in the three-dimensional model according to test requirements.
In the test process, a tester can obtain any data such as lubricating oil flow, lubricating oil temperature and lubricating oil pressure in real time through a two-dimensional or three-dimensional demonstration model, so that the full-state grasp of the real system state is performed for assisting the test decision.
3) In the virtual debugging process, the off-line simulation model calculates virtual debugging signals such as the opening of a valve of a setting valve of each branch, the rotating speed of a pump and the like according to the oil consumption requirements of each lubricating oil user. The off-line simulation model transmits the virtual debugging signals to an upper computer of the control console, and the upper computer displays parameters such as the virtual debugging signals through a virtual debugging interface. And the field operator selects whether to adopt the virtual debugging value according to the actual condition, and the real object test system receives the virtual debugging signal after adopting, so that the real object running state is consistent with the state of the simulation model, the oil using requirements of each lubricating oil user are met, and the virtual debugging of the digital twin body on the real object system is realized. By means of virtual debugging of the digital twin body, debugging time in the test process can be effectively shortened, and test efficiency is improved.
The method specifically comprises the following steps of setting and calculating the action parameters of each actuating mechanism of the lubricating oil system in advance through an offline model:
3.1 Calculating parameters of the branch regulating valve according to the flow of each lubricating oil user so that the flow of each lubricating oil user meets the requirement;
3.2 According to the target value of the pressure of the main lubricating oil pipe, the rotating speed of the electric lubricating oil pump and the opening of the main pipe pressure regulating valve are calculated so that the pressure of the main lubricating oil pipe meets the requirement;
3.3 Iteration 3.1 and 3.2 steps to ensure that the flow of each lubricating oil user and the pressure of a lubricating oil main pipe meet the requirements, at the moment, the system is in a stable state, and the pressure and the flow of the lubricating oil main pipe are kept stable;
3.4 According to the flow of the main lubricating oil pipe obtained in the step 3.3), calculating the opening of a cooling water regulating valve to obtain the flow of cooling water, so that the temperature of the lubricating oil passing through a cooler meets the requirements of each user;
4) And the physical lubricating oil system receives the control signal of the control system to adjust and control the operation of the physical lubricating oil system.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (2)
1. A digital twin-based lubricating oil system debugging method is characterized by comprising the following steps:
1) Establishing a simulation model of the lubricating oil system and the equipment by defining a lubricating oil system equipment model library; the simulation models of the lubricating oil system and the equipment comprise an online model and an offline model;
2) The online model receives real-time operation data of the real-time lubricating oil system acquired by the sensor in real time, transmits the online measured data to the simulation model to drive simulation calculation, and transmits the calculation result to the demonstration model for simulation animation display; demonstration model and material object system 1: similarly, associating the equipment model with the system model data in a numerical value form to display the real object state and the key parameter information;
the real-time operating data includes: measuring signal parameters of a lubricating oil system and controlling signal parameters of the lubricating oil system;
the lubricating oil system control signals comprise valve opening signals and pump rotating speed signals;
3) According to the flow requirements of the lubricating oil user under different preset working conditions, based on virtual-real fusion simulation, the action parameters of each actuating mechanism of the lubricating oil system are set and calculated in advance through an offline model and are transmitted to a control system as virtual debugging signals; the action parameters include: the rotation speed of the electric lubricating oil pump and the opening degree of each regulating valve;
the method specifically comprises the following steps of setting and calculating the action parameters of each actuating mechanism of the lubricating oil system in advance through an offline model:
3.1 According to the flow of each lubricating oil user, calculating the parameters of the branch regulating valve so that the flow of each lubricating oil user meets the requirements;
3.2 According to the target value of the pressure of the main lubricating oil pipe, the rotating speed of the electric lubricating oil pump and the opening of the main pipe pressure regulating valve are calculated, so that the pressure of the main lubricating oil pipe meets the requirement;
3.3 Iteration steps 3.1) and 3.2) to ensure that the flow of each lubricating oil user and the pressure of the lubricating oil main pipe meet the requirements, at the moment, the system is in a stable state, and the pressure and the flow of the lubricating oil main pipe are kept stable;
3.4 According to the flow of the lubricating oil main pipe obtained in the step 3.3), calculating the opening of a cooling water adjusting valve to obtain the flow of cooling water, so that the temperature of the lubricating oil passing through a cooler meets the requirements of each user;
4) And the physical lubricating oil system receives the control signal of the control system to adjust and control the operation of the physical lubricating oil system.
2. The digital twin-based lubricating oil system debugging method according to claim 1, wherein step 1) adopts a model language of a unified multiple physics modeling language, specifically as follows:
an equipment simulation model including an oil tank, an oil pump, a motor, an overflow valve, a filter, a check valve, a heat exchanger, a heater, a regulating valve, an oil medium, a pipeline model and a control module is constructed based on the multi-physical-quantity unified modeling language Modelica, and an oil system model is constructed based on the equipment simulation model.
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| CN117391424A (en) * | 2023-12-11 | 2024-01-12 | 延安随缘科技发展有限公司 | Preparation node combination method and system based on lubricating oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117391424A (en) * | 2023-12-11 | 2024-01-12 | 延安随缘科技发展有限公司 | Preparation node combination method and system based on lubricating oil |
| CN117391424B (en) * | 2023-12-11 | 2024-03-08 | 延安随缘科技发展有限公司 | Preparation node combination method and system based on lubricating oil |
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