CN114330777A - Method and system for determining maintenance standard of hot component of combustion engine - Google Patents
Method and system for determining maintenance standard of hot component of combustion engine Download PDFInfo
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Abstract
The invention discloses a method and a system for determining maintenance standards of a heat component of a combustion engine, wherein the method comprises the following steps: determining design structure parameters and design performance parameters of a gas turbine unit, and determining the material type and material performance data of a hot component needing to determine a maintenance standard; determining the distribution positions of the thermal components according to the design structure parameters, and determining the environmental state parameters of each thermal component in the running process of the gas turbine unit by combining the design performance parameters; determining the stress state parameter of each thermal component in the running process of the gas turbine unit according to the design structure parameter and the design performance parameter; the mechanical property of each thermal component is analyzed according to the material type, the material property data and the design form of each thermal component, and the available limit standard of the thermal component is determined by combining the stress state parameters of the current thermal component in the running process of the gas turbine unit. Through the technical scheme of the invention, standardized and quantitative scientific judgment basis can be provided for the overhaul and maintenance of the hot component.
Description
Technical Field
The invention relates to the technical field of gas turbine maintenance, in particular to a method and a system for determining the maintenance standard of a heat component of a combustion engine.
Background
At present, the combustion engine is divided into several kinds of operational modes, one is that the unit frequently opens and stops, and the second kind is that long period operation opens and stops very seldom, and another kind is between the two, and the operational mode is: the system is not started and stopped in 5 months in winter, and is started and stopped in other months, but the number of times is not more than 22 times per year. It is due to such different operating modes that the degree of defects of the thermal components can vary greatly. The judgment and maintenance standards of the hot components for the manufacturers of the combustion engines are conservative judgment and maintenance standards given by different operation modes of comprehensive users, are not distinguished according to the operation modes, are not given to the hot components (the hot components with the expected life) beyond the expected life, and cannot give standardized and quantitative judgment bases for the analysis, maintenance and repair of the hot components.
Disclosure of Invention
Aiming at the problems, the invention provides a method and a system for determining the maintenance standard of a heat component of a combustion engine, which comprehensively perform mechanical analysis on the structural and performance parameters of a combustion engine unit and the heat component and the state parameters in the operation process to obtain the allowable limit of no need of repair under different fault types when each heat component has faults in the operation process, thereby providing a standardized and quantized scientific judgment basis for the maintenance and repair of the heat component.
In order to achieve the above object, the present invention provides a method for determining a maintenance standard of a thermal component of a combustion engine, comprising:
determining design structure parameters and design performance parameters of a gas turbine unit, and determining material types and material performance data of hot components needing to determine maintenance standards in the gas turbine unit;
determining the distribution positions of the thermal components in the combustion engine unit according to the design structure parameters of the combustion engine unit, and determining the environmental state parameters of each thermal component in the running process of the combustion engine unit by combining the design performance parameters;
determining the stress state parameter of each thermal component in the running process of the gas turbine unit according to the design structure parameter and the design performance parameter;
analyzing the mechanical property of each thermal component according to the material type, the material property data and the design form of each thermal component, and determining the available limit standard of the thermal component by combining the stress state parameters of the current thermal component in the operation process of the gas turbine unit.
In the above technical solution, preferably, the method for determining the maintenance standard of the thermal component of the combustion engine further includes:
performing destructive testing on a thermal component sample in a typical failure mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
determining the available limit test standard of the hot component sample under destructive test conditions within the design performance parameter range of the normal operation of the combustion engine unit;
counting the usable limit average test standard of the thermal component sample under the destructive test condition under each typical failure mode;
and calculating a weighted average of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
In the above technical solution, preferably, the method for determining the maintenance standard of the thermal component of the combustion engine further includes:
counting the fault types of each thermal component, and determining the repair mode of the thermal component sample of each fault type;
carrying out a repair test on the hot component sample of each fault type in a corresponding repair mode;
detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and determining the repairable limit of the thermal component of each fault type according to the fault type, the repairing mode and the detection result of the thermal component sample.
In the above technical solution, preferably, the repairing manner includes replacing a coating, welding, brazing, grinding and dredging, and for a hot component with defective tissue properties, a recovery heat treatment manner or a combination of hot isostatic pressing and recovery heat treatment is adopted for repairing.
In the above technical solution, preferably, the heat treatment regime, the matrix texture characteristics, the creep law and the thermal fatigue damage mechanism of the material are determined according to the type of the material of the thermal component, and on this basis, a full-process operation damage change model of the thermal component is established according to the design form and the stress state parameters of the thermal component, so as to assist in calibrating the applicable limit implementation standard of the thermal component.
The invention also provides a maintenance standard determination system of the heat component of the combustion engine, which applies the maintenance standard determination method of the heat component of the combustion engine disclosed by any one of the technical schemes and comprises the following steps:
the system comprises a gas turbine component parameter acquisition module, a maintenance standard determination module and a maintenance standard determination module, wherein the gas turbine component parameter acquisition module is used for determining design structure parameters and design performance parameters of a gas turbine unit and determining the material type and material performance data of a hot component needing to determine the maintenance standard in the gas turbine unit;
the operating environment parameter determining module is used for determining the distribution positions of the thermal components in the combustion engine unit according to the design structure parameters of the combustion engine unit and determining the environmental state parameters of each thermal component in the operating process of the combustion engine unit by combining the design performance parameters;
the operation stress parameter determining module is used for determining stress state parameters of each thermal component in the operation process of the gas turbine unit according to the design structure parameters and the design performance parameters;
and the available limit standard determining module is used for analyzing the mechanical property of each thermal component according to the material type, the material property data and the design form of each thermal component, and determining the available limit standard of the thermal component by combining the stress state parameters of the current thermal component in the operation process of the combustion engine unit.
In the above technical solution, preferably, the system for determining the maintenance standard of the thermal component of the combustion engine further includes:
the destructive simulation testing module is used for carrying out destructive testing on a thermal component sample in a typical fault mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
the available limit standard testing module is used for determining the available limit testing standard of the hot component sample under destructive testing conditions within the range of the design performance parameters of the normal operation of the combustion engine unit;
the sample average standard counting module is used for counting the available limit average test standard of the hot component sample under the destructive test condition under each typical failure mode;
and the limit implementation standard calculation module is used for calculating a weighted average value of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
In the above technical solution, preferably, the system for determining the maintenance standard of the thermal component of the combustion engine further includes:
the fault type counting module is used for counting the fault type of each thermal component and determining the repairing mode of the thermal component sample of each fault type;
the fault repairing test module is used for performing repairing tests on the thermal component samples of each fault type in a corresponding repairing mode;
the test parameter detection module is used for detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and the repair limit confirming module is used for determining the repairable limit of the thermal component of each fault type according to the fault type, the repair mode and the detection result of the thermal component sample.
In the above technical solution, preferably, the repair method of the fault repair test module includes replacing a coating, welding, brazing, polishing and dredging, and for a hot component with a defective tissue property, a recovery heat treatment method or a method combining hot isostatic pressing and recovery heat treatment is adopted for repair.
In the above technical solution, preferably, the type of the material of the thermal component determines a heat treatment regime, a matrix texture characteristic, a creep law, and a thermal fatigue damage mechanism of the material, and on this basis, a full-process operation damage change model of the thermal component is established according to a design form and stress state parameters of the thermal component, so as to assist in calibrating an available limit implementation standard of the thermal component.
Compared with the prior art, the invention has the beneficial effects that: the allowable limit that each thermal component can not be repaired under different fault types when the thermal component breaks down in the operation process is obtained by comprehensively performing mechanical analysis on the structure and performance parameters of the engine unit and the thermal component and the state parameters in the operation process, so that standardized and quantized scientific judgment basis is provided for the overhaul and maintenance of the thermal component.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for determining a maintenance standard of a thermal component of a combustion engine according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a maintenance standard determination method for a thermal component of a combustion engine according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, the method for determining the maintenance standard of a thermal component of a combustion engine according to the present invention comprises:
determining design structure parameters and design performance parameters of the gas turbine unit, and determining the material type and material performance data of a hot component in the gas turbine unit, wherein the maintenance standard of the hot component needs to be determined;
determining the distribution positions of the thermal components in the gas turbine unit according to the design structure parameters of the gas turbine unit, and determining the environmental state parameters of each thermal component in the running process of the gas turbine unit by combining the design performance parameters;
determining the stress state parameter of each thermal component in the running process of the gas turbine unit according to the design structure parameter and the design performance parameter;
the mechanical property of each thermal component is analyzed according to the material type, the material property data and the design form of each thermal component, and the available limit standard of the thermal component is determined by combining the stress state parameters of the current thermal component in the running process of the gas turbine unit.
In the embodiment, the allowable limit that each thermal component can not be repaired under different fault types when the thermal component has faults in the operation process is obtained by comprehensively performing mechanical analysis on the structural and performance parameters of the engine unit and the thermal component and the state parameters in the operation process, so that the standard and quantitative scientific judgment basis is provided for the overhaul and maintenance of the thermal component.
Specifically, the design structure parameters of the gas turbine unit are parameters such as the overall design structure, composition, shape and specification of the gas turbine unit to be maintained, and the design performance parameters are parameters such as how high power is required to be provided at which parts, how high temperature is required to be reached at which parts, and how large pressure is required to be borne at which parts in the operation process of the gas turbine unit. According to the design structure parameters, the position of each hot component needing to determine the maintenance standard in the engine unit can be known, and the performance data required by the hot components in the operation process of the engine unit can be determined by combining the design performance parameters. And determining a limit which allows defects and can meet performance requirements without maintenance under the condition of ensuring that the normal operation of the combustion engine unit is met according to the material characteristics, design shape data and the like of the thermal component, taking the limit as the available limit standard of the current thermal component, and replacing or maintaining the thermal component as long as the available limit standard is exceeded so as to guide the maintenance schemes of different thermal components in the whole combustion engine unit.
As shown in fig. 2, in the above embodiment, preferably, the method for determining the maintenance standard of the thermal component of the combustion engine further includes:
performing destructive testing on a thermal component sample in a typical failure mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
determining the available limit test standard of a hot component sample under destructive test conditions within the design performance parameter range of normal operation of the gas turbine unit;
counting the usable limit average test standard of the thermal component sample under the destructive test condition under each typical failure mode;
and calculating a weighted average of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
In the embodiment, a simulated destructive test is carried out on a thermal component sample in a typical failure mode under the same state, so that the mechanical performance data of the thermal component sample, such as hardness, tension, durability and the like, are obtained, and the critical data of the thermal component sample in the performance parameter range for ensuring the normal operation of the combustion engine unit are determined through the accelerated test conditions.
Through the simulation test, the available limit test standard obtained by the simulation test and the theoretically calculated available limit standard are integrated, and the weighted average value of the available limit test standard and the theoretically calculated available limit standard is calculated by setting different weights and is used as the available limit implementation standard of the corresponding hot component in the current fault mode, so that the feasibility of the standard is improved.
In the above embodiment, preferably, the method for determining the maintenance standard of the thermal component of the combustion engine further comprises:
counting the fault types of each thermal component, and determining the repair mode of the thermal component sample of each fault type;
carrying out a repair test on the hot component sample of each fault type in a corresponding repair mode;
detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and determining the repairable limit of the thermal component of each fault type according to the fault type, the repairing mode and the detection result of the thermal component sample.
In the embodiment, after the usable limit of the thermal component is set as a standard, the defective thermal component is repaired according to the fault type of the thermal component, the theoretical repairability degree and the experimental repairability degree of the repair test are analyzed, the limit of the extent to which the thermal component of each fault type can be repaired is determined, and a guidance scheme is provided for the maintenance of the whole combustion engine unit.
In the above embodiment, preferably, the repairing method includes replacing coating, welding, brazing, grinding and dredging, and for the hot component with defective tissue performance, the repairing method is performed by adopting a recovery heat treatment method or a combination of hot isostatic pressing and recovery heat treatment.
Specifically, the troubleshooting criteria and repair methods for different types of thermal components are shown in the following table:
TABLE 1 first-level stator blade troubleshooting standards
TABLE 2 second stage stationary blade troubleshooting standards
TABLE 3 Standard for troubleshooting of first-class moving blade
TABLE 4 Standard for troubleshooting of Secondary moving blades
In the above embodiment, preferably, the heat treatment regime, the matrix texture characteristics, the creep rule and the thermal fatigue damage mechanism of the material are determined according to the type of the material of the thermal component, and on the basis, a full-flow operation damage change model of the thermal component is established according to the design form and the stress state parameters of the thermal component, so as to assist in calibrating the applicable limit implementation standard of the thermal component.
Specifically, based on the collected information of the unit and the thermal component, the working temperature, stress, pressure, cooling characteristics and the like of the blade are calculated and analyzed by adopting finite elements, hydrodynamics, thermodynamics and the like, and the dangerous part of the high-temperature and high-stress area of the thermal component is determined. Under the action of high temperature and high stress, the hot component may have failure modes such as creep (caused by high temperature and high stress influence), thermal fatigue (caused by temperature gradient), oxidation (caused by high temperature) and the like, and failures such as cracks, coating falling off, oxidation and substrate degradation are generated.
Based on a typical failure mode of a thermal component, damage mechanism analysis is carried out, and the following three aspects are considered in an important way:
(1) environmental factors: such as high temperature oxidation, hot corrosion, abrasion, erosion;
(2) mechanical factors: such as creep, high/low cycle fatigue, creep-fatigue interaction;
(3) synergistic effect: such as thermo-mechanical fatigue under the combined action of temperature and machinery, and thermo-fluid-solid coupling analysis under the combined action of temperature, fluid and machinery.
According to the operation and maintenance experience of foreign combustion engines, the design standard and life consumption influence factors of the combustion engines are shown in the following table. For a continuous working unit, the turbine blades and the combustion chamber mainly pay attention to the influence of high-temperature oxidation/corrosion/abrasion and creep on the service life, and the cycle start-stop unit mainly pays attention to the influence of cycle load on low-cycle fatigue.
On the premise of finite element calculation and analysis of the thermal component, the material mechanical property data of the thermal component is determined, and data support is provided for alloy structure recovery process research, creep life prediction and the like. Specifically, taking an MGA1400(DS) alloy designed and improved by mitsubishi corporation on the basis of the general company IN792 alloy as an example, the heat treatment system, the structure and the mechanical properties, especially the permanent creep data, of MGA1400(DS) alloy, IN792 alloy and MGA1400DS homemade M4706DS alloy IN the open literature are collected first, and the basic performance data of MGA1400(DS) alloy is formed by comparison and supplementation.
According to the embodiment, the performance data of the thermal component at different stages in the operation process are calculated aiming at the main damages of the thermal component such as high-temperature oxidation, thermal fatigue crack, creep damage and the like, and the working life of the thermal component is evaluated to establish a full-flow operation damage change model of the thermal component.
Particularly, the high-temperature oxidation life prediction mainly considers the degradation characteristic of the matrix structure of the hot component and the oxidation characteristic of the thermal barrier coating.
The matrix structure of the thermal component mainly evaluates the morphology, size and volume content of a gamma 'strengthening phase, crystal boundary and carbide transformation characteristics, and generally uses whether the volume content of the gamma' strengthening phase is more than 45% as a quantitative criterion to judge whether the matrix of the thermal component is continuously used or the tissue performance is recovered.
Thermal component thermal barrier coating life is primarily dependent on the Thermally Grown Oxide (TGO) thickness between the ceramic top coat and the metallic bottom coat. And judging whether the coating is in a ceramic surface layer peeling stage, a metal bottom layer consumption stage or a substrate oxidation and flesh reduction stage according to the growth trend of the TGO layer, so as to predict the high-temperature oxidation life of the thermal barrier coating, and judge whether the thermal barrier coating is continuously used or removed to prepare a new thermal barrier coating again.
2. Thermal fatigue crack life prediction
The residual life evaluation of the turbine thermal component is an evaluation system based on thermal fatigue damage and fracture mechanics, namely, the component is allowed to generate cracks and grow under a specified size. The thermal fatigue crack life prediction method comprises the steps of obtaining relevant design data of a thermal component, establishing a three-dimensional model, and calculating temperature, stress and strain change data of the thermal component through transient thermosetting coupling according to a unit working condition operation curve and operation data; considering the low cycle fatigue life loss caused by starting and stopping, and determining an initial stress intensity coefficient and an initial crack development speed through a given material stress range and a given crack initial size; and (4) calculating the total life loss of the key part by integrating the cycle increment required by the growth of the given initial size to the critical size, and predicting the propagation life of the thermal fatigue crack. Accordingly, whether the thermal component continues to work or is used after being repaired is determined.
3. Creep damage life prediction
(1) The creep damage life prediction process comprises the following steps:
analyzing a creep stress/strain distribution rule and a creep cavity formation rule of the thermal component based on a thermal component fault checking and calculation analysis result, matrix performance data and residual strength data, and identifying a creep stage of the life-prolonging thermal component;
(2) the creep damage life prediction is carried out from the following two aspects:
firstly, the creep damage life is predicted by utilizing an L-M thermal strength curve. Based on the performance data of the heat component substrate and the tested residual endurance strength, the performance data is determined according to the ratio of P (sigma) to T (22+ log)tT) fitting an L-M thermal strength curve, checking a parameter P (sigma) corresponding to the maximum stress under the service condition of the thermal component on the P (sigma) -sigma curve, and substituting P (sigma) into T (22+ log)tT), determining the creep damage life of the thermal component under the working temperature and stress conditions.
And secondly, predicting the creep damage Life by using a Life score principle by referring to EPRI GS-6544Gas Turbine Blade asset Assessment and Repair Guide (Blade Life Assessment and Repair Guide compiled by American electric research institute). The stress load and operating temperature of the hot component in service were conservatively estimated and the endurance strength was tested according to ASTM E139. A minimum of two samples need to be tested: one sample was taken from the leaf and one sample from the tenon. The remaining life is calculated by the following formula.
In the formula: ts is the running time;
ts is the time used for fracture under operating conditions;
tt is the time used for fracture under accelerated test conditions;
tt is the time taken for the matrix to fracture under accelerated test conditions.
If the leaf body tissue is obviously degraded, the gamma' strengthening phase is obviously redissolved, is aggregated and grown, is raft-shaped, has reduced volume fraction, or has creep voids, and the leaf is subjected to tissue performance recovery treatment; if micro-cracks or incipient melting phenomena occur in the blade tissue, the blade tissue can not be recovered, and the blade has no repairability.
And (3) recovering the blade tissue of the hot component needing to recover the tissue performance by adopting recovery heat treatment or hot isostatic pressing and recovery heat treatment based on the tissue recession degree and the number of creep cavities, wherein the recovered tissue, the tensile property and the lasting property are equivalent to those of the tenon before recovery.
The invention also provides a maintenance standard determination system of the thermal component of the combustion engine, which applies the maintenance standard determination method of the thermal component of the combustion engine disclosed in any one of the above embodiments and comprises the following steps:
the system comprises a gas turbine component parameter acquisition module, a maintenance standard determination module and a maintenance standard determination module, wherein the gas turbine component parameter acquisition module is used for determining design structure parameters and design performance parameters of a gas turbine unit and determining the material type and material performance data of a hot component needing to determine the maintenance standard in the gas turbine unit;
the operating environment parameter determining module is used for determining the distribution positions of the thermal components in the gas turbine unit according to the design structure parameters of the gas turbine unit and determining the environmental state parameters of each thermal component in the operating process of the gas turbine unit by combining the design performance parameters;
the operation stress parameter determining module is used for determining stress state parameters of each thermal component in the operation process of the gas turbine unit according to the design structure parameters and the design performance parameters;
and the available limit standard determining module is used for analyzing the mechanical property of each thermal component according to the material type, the material property data and the design form of each thermal component, and determining the available limit standard of the thermal component by combining the stress state parameters of the current thermal component in the running process of the combustion engine unit.
In the embodiment, the allowable limit that each thermal component can not be repaired under different fault types when the thermal component has faults in the operation process is obtained by comprehensively performing mechanical analysis on the structural and performance parameters of the engine unit and the thermal component and the state parameters in the operation process, so that the standard and quantitative scientific judgment basis is provided for the overhaul and maintenance of the thermal component.
In the above embodiment, preferably, the system for determining the maintenance standard of the thermal component of the combustion engine further comprises:
the destructive simulation testing module is used for carrying out destructive testing on a thermal component sample in a typical fault mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
the available limit standard testing module is used for determining the available limit testing standard of the hot component sample under the destructive testing condition within the design performance parameter range of the normal operation of the gas turbine unit;
the sample average standard counting module is used for counting the available limit average test standard of the hot component sample under the destructive test condition under each typical failure mode;
and the limit implementation standard calculation module is used for calculating a weighted average value of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
In the above embodiment, preferably, the system for determining the maintenance standard of the thermal component of the combustion engine further comprises:
the fault type counting module is used for counting the fault type of each thermal component and determining the repairing mode of the thermal component sample of each fault type;
the fault repairing test module is used for performing repairing tests on the thermal component samples of each fault type in a corresponding repairing mode;
the test parameter detection module is used for detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and the repair limit confirming module is used for determining the repairable limit of the thermal component of each fault type according to the fault type, the repair mode and the detection result of the thermal component sample.
In the above embodiment, preferably, the repair mode of the fault repair test module includes replacing coating, welding, brazing, grinding and dredging, and for the hot component with defective tissue performance, the repair is performed by adopting a recovery heat treatment mode or a mode of combining hot isostatic pressing and recovery heat treatment.
In the above embodiment, preferably, the type of the material of the thermal component determines the heat treatment regime, the matrix texture characteristics, the creep rule and the thermal fatigue damage mechanism of the material, and on the basis, a full-flow operation damage change model of the thermal component is established according to the design form and the stress state parameters of the thermal component, so as to assist in calibrating the applicable limit implementation standard of the thermal component.
According to the maintenance standard determination system for the thermal component of the combustion engine disclosed in the above embodiment, the functions implemented by the modules correspond to the steps in the maintenance standard determination method for the thermal component of the combustion engine in the above embodiment, and are not described again here.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for determining the maintenance standard of a hot component of a combustion engine is characterized by comprising the following steps:
determining design structure parameters and design performance parameters of a gas turbine unit, and determining material types and material performance data of hot components needing to determine maintenance standards in the gas turbine unit;
determining the distribution positions of the thermal components in the combustion engine unit according to the design structure parameters of the combustion engine unit, and determining the environmental state parameters of each thermal component in the running process of the combustion engine unit by combining the design performance parameters;
determining the stress state parameter of each thermal component in the running process of the gas turbine unit according to the design structure parameter and the design performance parameter;
analyzing the mechanical property of each thermal component according to the material type, the material property data and the design form of each thermal component, and determining the available limit standard of the thermal component by combining the stress state parameters of the current thermal component in the operation process of the gas turbine unit.
2. The method for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 1, further comprising:
performing destructive testing on a thermal component sample in a typical failure mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
determining the available limit test standard of the hot component sample under destructive test conditions within the design performance parameter range of the normal operation of the combustion engine unit;
counting the usable limit average test standard of the thermal component sample under the destructive test condition under each typical failure mode;
and calculating a weighted average of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
3. The method for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 1 or 2, further comprising:
counting the fault types of each thermal component, and determining the repair mode of the thermal component sample of each fault type;
carrying out a repair test on the hot component sample of each fault type in a corresponding repair mode;
detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and determining the repairable limit of the thermal component of each fault type according to the fault type, the repairing mode and the detection result of the thermal component sample.
4. The method for determining the maintenance standard of the hot component of the combustion engine as claimed in claim 3, wherein the repairing mode comprises coating replacement, welding, brazing, grinding and dredging, and for the hot component with the defective tissue performance, the repairing mode is carried out by adopting a recovery heat treatment mode or a mode of combining hot isostatic pressing and the recovery heat treatment.
5. The method for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 2, wherein the heat treatment system, the matrix organization characteristics, the creep rule and the thermal fatigue damage mechanism of the material are determined according to the type of the material of the thermal component, and on the basis, a full-process operation damage change model of the thermal component is established according to the design form and the stress state parameters of the thermal component so as to assist in calibrating the available limit implementation standard of the thermal component.
6. A maintenance standard determination system of a thermal component of a combustion engine, which is characterized in that the maintenance standard determination method of the thermal component of the combustion engine according to any one of claims 1 to 5 is applied, and comprises the following steps:
the system comprises a gas turbine component parameter acquisition module, a maintenance standard determination module and a maintenance standard determination module, wherein the gas turbine component parameter acquisition module is used for determining design structure parameters and design performance parameters of a gas turbine unit and determining the material type and material performance data of a hot component needing to determine the maintenance standard in the gas turbine unit;
the operating environment parameter determining module is used for determining the distribution positions of the thermal components in the combustion engine unit according to the design structure parameters of the combustion engine unit and determining the environmental state parameters of each thermal component in the operating process of the combustion engine unit by combining the design performance parameters;
the operation stress parameter determining module is used for determining stress state parameters of each thermal component in the operation process of the gas turbine unit according to the design structure parameters and the design performance parameters;
and the available limit standard determining module is used for analyzing the mechanical property of each thermal component according to the material type, the material property data and the design form of each thermal component, and determining the available limit standard of the thermal component by combining the stress state parameters of the current thermal component in the operation process of the combustion engine unit.
7. A system for determining the maintenance standard of a thermal component of a combustion engine as claimed in claim 6, further comprising:
the destructive simulation testing module is used for carrying out destructive testing on a thermal component sample in a typical fault mode under the corresponding environmental state and stress state according to the environmental state parameters and stress state parameters of each thermal component in the running process of the gas turbine unit, and acquiring the mechanical property parameters of the thermal component sample in the destructive testing process;
the available limit standard testing module is used for determining the available limit testing standard of the hot component sample under destructive testing conditions within the range of the design performance parameters of the normal operation of the combustion engine unit;
the sample average standard counting module is used for counting the available limit average test standard of the hot component sample under the destructive test condition under each typical failure mode;
and the limit implementation standard calculation module is used for calculating a weighted average value of the available limit average standard and the available limit standard of the corresponding thermal component in the fault mode as the available limit implementation standard of the corresponding thermal component in the current fault mode.
8. The system for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 6 or 7, further comprising:
the fault type counting module is used for counting the fault type of each thermal component and determining the repairing mode of the thermal component sample of each fault type;
the fault repairing test module is used for performing repairing tests on the thermal component samples of each fault type in a corresponding repairing mode;
the test parameter detection module is used for detecting the structural characteristics and the performance characteristics of the hot component sample after the repair test is finished;
and the repair limit confirming module is used for determining the repairable limit of the thermal component of each fault type according to the fault type, the repair mode and the detection result of the thermal component sample.
9. The system for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 8, wherein the repair modes of the fault repair test module include coating replacement, welding, brazing, grinding and dredging, and for the thermal component with defective tissue performance, the repair modes are performed by adopting a recovery heat treatment mode or a mode of combining hot isostatic pressing and the recovery heat treatment.
10. The system for determining the maintenance standard of the thermal component of the combustion engine as claimed in claim 7, wherein the material type of the thermal component determines the heat treatment system, the matrix organization characteristics, the creep rule and the thermal fatigue damage mechanism of the material, and on the basis, a full-process operation damage change model of the thermal component is established according to the design form and the stress state parameters of the thermal component so as to assist in calibrating the available limit implementation standard of the thermal component.
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| CN202111669523.1A CN114330777A (en) | 2021-12-31 | 2021-12-31 | Method and system for determining maintenance standard of hot component of combustion engine |
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|---|---|---|---|
| CN202111669523.1A CN114330777A (en) | 2021-12-31 | 2021-12-31 | Method and system for determining maintenance standard of hot component of combustion engine |
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| CN114330777A true CN114330777A (en) | 2022-04-12 |
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| CN202111669523.1A Pending CN114330777A (en) | 2021-12-31 | 2021-12-31 | Method and system for determining maintenance standard of hot component of combustion engine |
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