CN112379198A - Method and system for evaluating residual life of equipment - Google Patents
Method and system for evaluating residual life of equipment Download PDFInfo
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Abstract
The invention discloses a method and a system for evaluating the residual life of equipment, wherein the method comprises the following steps: step 1, receiving a life evaluation instruction and determining equipment information of equipment to be evaluated according to the life evaluation instruction; step 2, carrying out structural analysis on the equipment to be evaluated, and classifying parts in the equipment to be evaluated into durable parts and vulnerable parts; step 3, acquiring a time record of the fault occurrence of the wearing part in the historical overhaul data of the equipment to be evaluated, and fitting a service life function of the wearing part by adopting a preset distribution function; step 4, calculating the residual life of all the wearing parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the wearing parts; and 5, calculating the residual life of the equipment to be evaluated according to the weighted calculation and by combining the residual life of the wearing parts. The parts in the equipment to be evaluated are classified into the durable parts and the wearing parts, and after the service life function of the wearing parts is fitted, the residual life of all the wearing parts and the residual life of the equipment are calculated by combining the service time of the equipment.
Description
Technical Field
The invention relates to the technical field of operation of thermal power stations, in particular to a method and a system for evaluating residual life of equipment.
Background
In modern society, due to the appearance of various new devices, the production efficiency is improved, the labor intensity is reduced, but problems also occur, and as most of devices are automatically controlled to work, the safety and reliability of the devices are important.
The equipment reliability is an important guarantee for the safety production of the thermal generator set. Therefore, in the whole life cycle of the equipment, the optimal balance of unit reliability and economy is realized through the management optimization of the equipment, and the method has important significance for the production and operation of the power plant. Residual service life (RUL) refers to the length of time the machine is in operation before being serviced or replaced. With RUL, engineers can schedule maintenance times, optimize operating efficiency, and avoid unplanned outages. Therefore, predicting RUL is a primary task in predictive maintenance planning.
The equipment state evaluation has an important role in power market bidding transaction, the safety of the equipment is mainly considered in the conventional equipment state evaluation, the safety threshold is mostly a static index, the parameter change condition in the actual operation condition of the equipment is ignored, and the evaluation system is single.
Disclosure of Invention
The invention aims to provide a method and a system for evaluating the residual service life of equipment, which can quickly evaluate the residual service life of the equipment, thereby facilitating maintenance and improving the use reliability of the equipment.
In order to solve the above technical problem, an embodiment of the present invention provides an apparatus residual life assessment method, including:
step 1, receiving a life evaluation instruction and determining equipment information of equipment to be evaluated according to the life evaluation instruction;
step 2, carrying out structural analysis on the equipment to be evaluated, and classifying parts in the equipment to be evaluated into durable parts and vulnerable parts;
step 3, acquiring a time record of the fault occurrence of the wearing part in the historical overhaul data of the equipment to be evaluated, and fitting a service life function of the wearing part by adopting a preset distribution function;
step 4, calculating the residual life of all the wearing parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the wearing parts;
and 5, calculating the residual life of the equipment to be evaluated according to the weighted calculation and by combining the residual life of the wearing parts.
Wherein the step 3 comprises:
and fitting the service life function of each vulnerable part by adopting a Weibull distribution function, an exponential distribution statistical function or a normal distribution and lognormal distribution statistical function.
Wherein, after the step 5, the method further comprises the following steps:
setting residual life threshold values in a grading mode;
and after the early warning of the exceeding of the residual service life of the equipment to be evaluated, comprehensively evaluating and outputting the residual service life index of the equipment to be evaluated.
Wherein, still include:
judging whether the current residual life of the equipment to be evaluated is smaller than the minimum value of the current residual life threshold value;
and if so, increasing the residual life threshold corresponding to the equipment to be evaluated by one level and outputting alarm information.
Wherein, after the step 5, the method further comprises the following steps:
determining the weighting coefficient of the power output of the equipment to be evaluated to the residual life under different working conditions;
acquiring the residual life of the equipment to be evaluated which is evaluated last time;
acquiring a power output state, corresponding working time and corresponding weighting coefficient corresponding to the equipment to be evaluated;
and calculating the current residual life of the current equipment to be evaluated according to a preset rule and outputting the current residual life.
In addition, an embodiment of the present invention further provides an apparatus residual life evaluation system, including:
the equipment determining module is used for determining equipment information corresponding to equipment needing life evaluation according to the received life evaluation instruction;
the component classification module is connected with the equipment determination module and is used for classifying the equipment components into a durable component and a vulnerable component according to the service life evaluation instruction and the equipment information;
the service life function determining module is connected with the component classifying module and used for fitting a service life function corresponding to the quick-wear part according to a preset time record for acquiring the fault occurrence of the quick-wear part in the historical overhaul data of the equipment to be evaluated according to the service life evaluating instruction;
the vulnerable part residual life calculation module is connected with the vulnerable part life function determination module and used for calculating the residual life of all the vulnerable parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the vulnerable parts;
and the equipment residual life calculating module is connected with the wearing part residual life calculating module and calculates the residual life of the equipment to be evaluated according to weighted calculation and by combining the residual life of the wearing part.
The system also comprises a distribution function determining module connected with the service life calculating module of the wearing parts, and the distribution function determining module is used for selecting and determining the distribution function adopted when the service life function of the wearing parts is fitted according to the service life evaluation instruction.
The device further comprises a threshold setting module connected with the device residual life calculation module and used for setting residual life thresholds for the devices to be evaluated in a grading mode, and after the residual life of the devices to be evaluated is subjected to overrun early warning, comprehensively evaluating and outputting the residual life index of the devices to be evaluated.
The device comprises a threshold setting module, a threshold level adjusting module and an alarm information output module, wherein the threshold level adjusting module is connected with the threshold setting module and used for increasing the residual life threshold corresponding to the equipment to be evaluated by one level and outputting alarm information after detecting that the current residual life of the equipment to be evaluated is smaller than the minimum value of the current residual life threshold.
The device further comprises a service life change module connected with the device residual life calculation module and used for determining the weighting coefficient of the power output of the device to be evaluated to the residual life under different working conditions, and after the power output state, the corresponding working time and the corresponding weighting coefficient corresponding to the device to be evaluated are combined after the last estimated residual life of the device to be evaluated is combined, the current residual life of the device to be evaluated is calculated and output according to a preset rule.
Compared with the prior art, the method and the system for evaluating the residual life of the equipment provided by the embodiment of the invention have the following advantages:
according to the method and the system for evaluating the residual life of the equipment, the parts in the equipment to be evaluated are classified into the durable parts and the wearing parts, after the service life function of the wearing parts is fitted, the residual life of all the wearing parts and the residual life of the equipment are calculated by combining the service time of the equipment, the data source obtaining mode is simple, the calculating mode is not complex, the use cost is low, the residual life of the equipment can be calculated in real time, so that maintenance personnel can conveniently and reasonably use the equipment and timely maintain the equipment, the use efficiency and the use economy of the equipment are improved, and the operation reliability of the equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for evaluating a residual life of a device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a system for evaluating residual life of equipment according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 2, fig. 1 is a schematic flowchart illustrating steps of a method for evaluating a residual lifetime of a device according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of an embodiment of a system for evaluating residual life of equipment according to an embodiment of the present invention.
In one embodiment, the method for evaluating the residual life of the equipment comprises the following steps:
step 1, receiving a life evaluation instruction and determining equipment information of equipment to be evaluated according to the life evaluation instruction;
step 2, carrying out structural analysis on the equipment to be evaluated, and classifying parts in the equipment to be evaluated into durable parts and vulnerable parts;
step 3, acquiring a time record of the fault occurrence of the wearing part in the historical overhaul data of the equipment to be evaluated, and fitting a service life function of the wearing part by adopting a preset distribution function;
step 4, calculating the residual life of all the wearing parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the wearing parts;
and 5, calculating the residual life of the equipment to be evaluated according to the weighted calculation and by combining the residual life of the wearing parts.
Through treating among the aassessment equipment part classification for durable and vulnerable part, after the life function of vulnerable part was fit out, combine the equipment live time to calculate the remaining life-span of all vulnerable parts and equipment, the source acquisition mode of data is simple, the calculation mode is uncomplicated, use cost is low, can calculate the remaining life-span of equipment in real time, can make things convenient for maintainer to rationally use this equipment and in time maintain like this, improve the availability factor and the use economy of equipment, improve the operational reliability of equipment.
According to the invention, the parts of the equipment are classified firstly, and because the service lives of the wearing parts and the durable parts are greatly different, the wearing parts are similar to the engine, the tire and the like of an automobile and are frequently used, the service life is short, but for example, the steering wheel, the hub and the like are less worn, the service life is short, and after the service life of a plurality of pieces of equipment is used up, not all the parts can be used, but some wearing parts are damaged firstly, so that the whole equipment can not be used.
Therefore, there is a need for an accurate analysis of the wearing part, the life of the wearing part with the substantially shortest life is close to the life of the device, the present invention is not limited to how to obtain the service life function of the wearing part, and in one embodiment, the step 3 includes:
and fitting the service life function of each vulnerable part by adopting a Weibull distribution function, an exponential distribution statistical function or a normal distribution and lognormal distribution statistical function.
The service life functions of the wearing parts can be the same or different, but generally the service life functions of different wearing parts are different, and one function can be adopted, for example, only a Weibull distribution function is adopted to fit the service life functions of different wearing parts, or an exponential distribution statistical function can be obtained, or even different wearing parts are adopted to fit different functions to obtain the service life functions, and the service life functions are not limited by the invention.
Since different wearing parts are damaged in different degrees in use, for example, for a water supply pump, the cylinder is a durable part, the bearing is a wearing part, but the bearing chamber is a durable part, etc., although the residual life of each wearing part can be obtained in the above manner, how to perform maintenance, and performing maintenance at that point in time is an important point, it is impossible for a maintenance person to perform careless replacement or repair of the wearing part to improve the service life of the equipment, and in order to improve the maintenance efficiency, the maintenance has certain standard, in one embodiment, after the step 5, the method further includes:
setting residual life threshold values in a grading mode;
and after the early warning of the exceeding of the residual service life of the equipment to be evaluated, comprehensively evaluating and outputting the residual service life index of the equipment to be evaluated.
Through setting up the remaining life threshold value in grades, the frequency of patrolling and examining, point in different levels can be different like this, can improve maintenance efficiency like this, through setting up different levels, can carry out the maintenance or the change of equipment after reaching certain condition moreover for the plant maintenance has orderliness more.
Since the service life of the equipment is different at different stages in the use process of the equipment, the service life is reduced all the time, and in order to improve the maintenance efficiency, in an embodiment of the invention, the method for evaluating the residual life of the equipment further comprises the following steps:
judging whether the current residual life of the equipment to be evaluated is smaller than the minimum value of the current residual life threshold value;
and if so, increasing the residual life threshold corresponding to the equipment to be evaluated by one level and outputting alarm information.
After the residual life of the current equipment to be evaluated is lower than the lowest threshold value of the current level, the early warning level is automatically increased, and maintainers can know the residual life in time, so that the equipment maintenance efficiency is improved, and the reliability of the equipment is improved. For example, the participating service life of the device is now 500 hours, multiple threshold values are set, such as 400 hours, 300 hours, 200 hours, etc., to different levels, and after the residual service life of less than 400 hours, the warning level or the maintenance level needs to be raised.
The influence on the residual life of the equipment under different working conditions is different in the using process of the equipment. If the residual life of the water supply pump is 500 hours at present, if the working power of the water supply pump is half of the rated power, the actually consumed residual life per hour is not one hour or two hours, and conversely, if the power of the water supply pump exceeds the rated power, even 10 minutes, but the ten minutes has the effect that the consumption of the residual life of the water supply pump may exceed the next hour of the rated power, so that the residual life cannot be simply calculated according to the actual service time.
In this way, the expected effectiveness is obtained mainly based on that the device is not operated at full power under normal conditions when in operation, but a condition that the device is operated at over power or required to be operated at over power due to faults or some accidents of other devices also occurs, but the calculation of the remaining life of the device cannot be directly calculated according to the actual operation time, in order to solve the problem, in an embodiment of the present invention, after the step 5, the method further includes:
determining the weighting coefficient of the power output of the equipment to be evaluated to the residual life under different working conditions;
acquiring the residual life of the equipment to be evaluated which is evaluated last time;
acquiring a power output state, corresponding working time and corresponding weighting coefficient corresponding to the equipment to be evaluated;
and calculating the current residual life of the current equipment to be evaluated according to a preset rule and outputting the current residual life.
By carrying out weighting operation, the accurate residual life of the equipment can be more reasonably obtained, efficient and accurate maintenance is realized, and the maintenance efficiency is improved.
The present invention does not limit the weighting coefficients and calculation method of the device in each power output state. If the device is operated at 90% of the rated power, the weighting factor at the corresponding operating time should be small, which may be 0.8, etc., corresponding to an operation of one hour at this state corresponding to a movement of 0.8 x 1 to 0.8 hour at the rated power, whereas if the device is operated at an excess power, such as 1.2 times the rated power, the corresponding weighting factor may not be 1.2, which may be 1.5, which may correspond to 1.5 hours at the rated power every hour of operation, etc., in this way, the calculation and statistics of the residual life can be accurately performed, the efficiency of field maintenance can be improved, and the reliability of use of the device can be improved.
In addition, an embodiment of the present invention further provides an apparatus residual life evaluation system, including:
the device determining module 10 is configured to determine, according to the received life assessment instruction, device information corresponding to a device that needs to be subjected to life assessment;
a component classification module 20 connected to the equipment determination module 10 for classifying the equipment components into durable components and vulnerable components according to the life evaluation instructions and the equipment information;
a vulnerable part life function determining module 30, connected to the component classifying module 20, for fitting a service life function corresponding to the vulnerable part according to a preset time record of occurrence of a fault of the vulnerable part in the historical overhaul data of the device to be evaluated, to the vulnerable part according to the life evaluation instruction;
the vulnerable part residual life calculating module 40 is connected with the vulnerable part life function determining module 30 and is used for calculating the residual life of all the vulnerable parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the vulnerable parts;
and the equipment residual life calculating module 50 is connected with the wearing part residual life calculating module 40, and calculates the residual life of the equipment to be evaluated according to weighting calculation and by combining the residual life of the wearing part.
Since the device residual life evaluation system is a system corresponding to the device residual life evaluation method, the device residual life evaluation system has the same beneficial effects, and the detailed description of the invention is omitted.
In the present invention, the service life function of the wearing part can be set by the system itself, but in some cases needs to be changed, in order to solve this technical problem, in an embodiment of the present invention, the system for evaluating the residual life of the device further includes a distribution function determining module connected to the wearing part service life calculating module 40, for selecting and determining a distribution function used when the wearing part fits the service life function according to the service life evaluating instruction.
It should be noted that, the selection manner of the distribution function determination module is not limited in the present invention, and the selection manner may be selected in a mode manner, or may be selected in another manner, or may be directly input to the distribution function, and the distribution function used is not limited to the weibull distribution function, the exponential distribution statistical function, the normal distribution statistical function, and the lognormal distribution statistical function, or may be another function, which is not limited in the present invention.
In order to solve the problem, in one embodiment of the present invention, the device residual life assessment system further includes a threshold setting module connected to the device residual life calculation module 50, and configured to set a residual life threshold for the device to be assessed in a grading manner, and after the residual life of the device to be assessed is early-warned that the residual life exceeds the limit, comprehensively assess and output the residual life index of the device to be assessed.
Through setting up the remaining life threshold value in grades, the frequency of patrolling and examining, point in different levels can be different like this, can improve maintenance efficiency like this, through setting up different levels, can carry out the maintenance or the change of equipment after reaching certain condition moreover for the plant maintenance has orderliness more.
In order to improve maintenance efficiency, in an embodiment, the device residual life assessment system further includes a threshold level adjustment module connected to the threshold setting module, and configured to, after detecting that the current residual life of the device to be assessed is smaller than the minimum value of the current residual life threshold, increase the residual life threshold corresponding to the device to be assessed by one level and output alarm information.
After the residual life of the current equipment to be evaluated is lower than the lowest threshold value of the current level, the early warning level is automatically increased, and maintainers can know the residual life in time, so that the equipment maintenance efficiency is improved, and the reliability of the equipment is improved. For example, the participating service life of the device is now 500 hours, multiple threshold values are set, such as 400 hours, 300 hours, 200 hours, etc., to different levels, and after the residual service life of less than 400 hours, the warning level or the maintenance level needs to be raised. Maintenance personnel can execute different operations under different early warning levels, so that equipment maintenance becomes more targeted, and the maintenance efficiency is improved.
In this way, the expected performance is obtained mainly based on the fact that the device is not operated at full power under normal conditions when the device is operated, but the situation that the device is caused or required to operate at over-power due to faults or some accidents of other devices also occurs, but the calculation of the residual life of the device cannot be directly calculated according to the actual operation time, in order to solve the problem, in an embodiment of the present invention, the device residual life evaluation system further includes a life change module connected to the device residual life calculation module 50, and is configured to determine the weighting coefficients of the power output of the device to be evaluated on the residual life under different operating conditions, and after combining the residual life evaluated last time of the device to be evaluated, combine the power output state, the corresponding operating time and the corresponding weighting coefficients of the device to be evaluated, and calculating the current residual life of the current equipment to be evaluated according to a preset rule and outputting the current residual life.
By adopting the weighting coefficient mode to calculate, the residual service life of the equipment is more reasonably and accurately calculated, so that the maintenance of the equipment becomes more targeted finally, and the maintenance efficiency of the equipment is improved.
In summary, according to the method and system for evaluating the residual life of the device provided by the embodiments of the present invention, the parts in the device to be evaluated are classified into the durable part and the vulnerable part, after the service life function of the vulnerable part is fitted, the service life of all the vulnerable parts and the residual life of the device are calculated by combining the service time of the device, the data source obtaining manner is simple, the calculation manner is not complex, the use cost is low, and the residual life of the device can be calculated in real time, so that the device can be conveniently and reasonably used by a maintainer and maintained in time, the use efficiency and the use economy of the device are improved, and the operation reliability of the device is improved.
The method and system for evaluating the residual life of the equipment provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A method for evaluating a residual life of a device, comprising:
step 1, receiving a life evaluation instruction and determining equipment information of equipment to be evaluated according to the life evaluation instruction;
step 2, carrying out structural analysis on the equipment to be evaluated, and classifying parts in the equipment to be evaluated into durable parts and vulnerable parts;
step 3, acquiring a time record of the fault occurrence of the wearing part in the historical overhaul data of the equipment to be evaluated, and fitting a service life function of the wearing part by adopting a preset distribution function;
step 4, calculating the residual life of all the wearing parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the wearing parts;
and 5, calculating the residual life of the equipment to be evaluated according to the weighted calculation and by combining the residual life of the wearing parts.
2. The method for evaluating the residual life of the equipment according to claim 1, wherein the step 3 comprises:
and fitting the service life function of each vulnerable part by adopting a Weibull distribution function, an exponential distribution statistical function or a normal distribution and lognormal distribution statistical function.
3. The method for evaluating the residual life of a device according to claim 2, further comprising, after said step 5:
setting residual life threshold values in a grading mode;
and after the early warning of the exceeding of the residual service life of the equipment to be evaluated, comprehensively evaluating and outputting the residual service life index of the equipment to be evaluated.
4. The method of evaluating a residual life of a device according to claim 3, further comprising:
judging whether the current residual life of the equipment to be evaluated is smaller than the minimum value of the current residual life threshold value;
and if so, increasing the residual life threshold corresponding to the equipment to be evaluated by one level and outputting alarm information.
5. The method for evaluating the residual life of a device according to claim 4, further comprising, after the step 5:
determining the weighting coefficient of the power output of the equipment to be evaluated to the residual life under different working conditions;
acquiring the residual life of the equipment to be evaluated which is evaluated last time;
acquiring a power output state, corresponding working time and corresponding weighting coefficient corresponding to the equipment to be evaluated;
and calculating the current residual life of the current equipment to be evaluated according to a preset rule and outputting the current residual life.
6. An equipment residual life assessment system, comprising:
the equipment determining module is used for determining equipment information corresponding to equipment needing life evaluation according to the received life evaluation instruction;
the component classification module is connected with the equipment determination module and is used for classifying the equipment components into a durable component and a vulnerable component according to the service life evaluation instruction and the equipment information;
the service life function determining module is connected with the component classifying module and used for fitting a service life function corresponding to the quick-wear part according to a preset time record for acquiring the fault occurrence of the quick-wear part in the historical overhaul data of the equipment to be evaluated according to the service life evaluating instruction;
the vulnerable part residual life calculation module is connected with the vulnerable part life function determination module and used for calculating the residual life of all the vulnerable parts according to the actual running hours of the equipment to be evaluated and the service life function corresponding to the vulnerable parts;
and the equipment residual life calculating module is connected with the wearing part residual life calculating module and calculates the residual life of the equipment to be evaluated according to weighted calculation and by combining the residual life of the wearing part.
7. The system for assessing the residual life of a device according to claim 6, further comprising a distribution function determining module connected to the consumable part service life calculating module for selecting and determining a distribution function for the consumable part to fit the service life function according to the life assessment instructions.
8. The system for evaluating the residual life of the device according to claim 7, further comprising a threshold setting module connected to the device residual life calculation module, configured to set a residual life threshold for the device to be evaluated in a hierarchical manner, and after the warning of the excessive residual life of the device to be evaluated, comprehensively evaluate and output a residual life index of the device to be evaluated.
9. The device residual life evaluation system according to claim 8, further comprising a threshold level adjustment module connected to the threshold setting module, configured to, after detecting that the current residual life of the device to be evaluated is smaller than the minimum value of the current residual life threshold, increase the residual life threshold corresponding to the device to be evaluated by one level and output alarm information.
10. The device residual life evaluation system according to claim 9, further comprising a life change module connected to the device residual life calculation module, configured to determine a weighting coefficient of power output to the residual life of the device to be evaluated under different working conditions, and after combining the residual life evaluated last time by the device to be evaluated, calculate and output the current residual life of the device to be evaluated according to a preset rule by combining a power output state corresponding to the device to be evaluated, a corresponding operating time, and the corresponding weighting coefficient.
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| CN113032985A (en) * | 2021-03-11 | 2021-06-25 | 北京必创科技股份有限公司 | Intelligent service life assessment method and device for wireless sensing equipment |
| CN113139734A (en) * | 2021-04-30 | 2021-07-20 | 重庆城市管理职业学院 | Intelligent manufacturing management system based on data mining |
| CN113822580A (en) * | 2021-09-24 | 2021-12-21 | 华润电力技术研究院有限公司 | Equipment working condition evaluation method and related equipment |
| CN113867513A (en) * | 2021-09-18 | 2021-12-31 | 山东云海国创云计算装备产业创新中心有限公司 | Prediction method, device, equipment and medium for service life of PSU |
| CN115619098A (en) * | 2022-10-26 | 2023-01-17 | 国网浙江省电力有限公司物资分公司 | Intelligent electric power material data processing method based on grading monitoring and early warning |
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| CN113032985B (en) * | 2021-03-11 | 2024-04-26 | 北京必创科技股份有限公司 | Intelligent evaluation method and device for service life of wireless sensing equipment |
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