CN109685226A - A kind of steam turbine Host Status repair method and system - Google Patents
A kind of steam turbine Host Status repair method and system Download PDFInfo
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Abstract
本发明提供了一种汽轮机主机状态检修方法及系统，首先确定汽轮机主机的关键部件，然后根据制造厂提供的设计数据和汽轮机日常工作中的检修与技术监督数据，确定转动部件和高温承压部件的强度、寿命薄弱部位、工作温度在380℃以上的高温螺栓极限伸长量，再确认汽轮机主机状态评价所需的状态参数，对所有状态参数进行综合状态评价，取所有状态参数中最差的状态为汽轮机主机状态；根据汽轮机主机状态确定相应的检修策略。本发明提供的方法克服了现有技术的不足，据检修数据、离线数据与在线数据，对汽轮机关键部件的状态参数进行监控，根据汽轮机整体状态采取对应的检修策略，实现汽轮机主机的状态检修，大大提高了汽轮机检修的有效性和可靠性。
The invention provides a state maintenance method and system for the main engine of a steam turbine. First, the key components of the main engine of the steam turbine are determined, and then the rotating parts and the high-temperature pressure-bearing parts are determined according to the design data provided by the manufacturer and the maintenance and technical supervision data in the daily work of the steam turbine. The strength, weak parts of life, and the ultimate elongation of high-temperature bolts with working temperature above 380 ℃, and then confirm the state parameters required for the state evaluation of the steam turbine main engine, conduct a comprehensive state evaluation of all state parameters, and take the worst of all state parameters. The state is the state of the main engine of the steam turbine; the corresponding maintenance strategy is determined according to the state of the main engine of the steam turbine. The method provided by the invention overcomes the deficiencies of the prior art, monitors the state parameters of the key components of the steam turbine according to the maintenance data, offline data and online data, adopts a corresponding maintenance strategy according to the overall state of the steam turbine, and realizes the state maintenance of the main engine of the steam turbine. Greatly improve the effectiveness and reliability of steam turbine maintenance.
Description
Technical field
The present invention relates to a kind of steam turbine Host Status repair method and systems, belong to steam turbine technology field.
Background technique
Currently, China's power generation is still based on coal fired power generation, thermoelectricity generated energy still accounts for 60% or more within 2017, undertakes domestic electricity
The heavy burden of power supply still falls in coal-fired power plant.The maintenance of the coal-fired power plants such as steam turbine main equipment is still with scheduled overhaul
It is main, owe to repair that repair phenomenon with mistake generally existing.As new normality is stepped into power industry development in China's, there is an urgent need to change for electricity power enterprise
Maintenance mode is transitioned into repair based on condition of component from scheduled overhaul by extensive management mode.
Steam turbine is one of most important equipment in coal-burning power plant, be implement repair based on condition of component primary equipment, both at home and abroad for
Subsidiary engine repair based on condition of component has certain research, but the prior art is mainly from the failure predication of equipment and processing, can not be to showing
There is the state of equipment to be evaluated, equipment standing state can not be evaluated and be combined with Strategies of Maintenance, implementation result is unsatisfactory.
Therefore, electric power enterprise is badly in need of a set of state maintenance method and system for turbine body, whole according to steam turbine
Body state takes corresponding Strategies of Maintenance, realizes the repair based on condition of component of steamer machine host.
Summary of the invention
Corresponding Strategies of Maintenance is taken according to steam turbine integrality the technical problem to be solved in the present invention is to provide a kind of,
Realize the repair method and system of the repair based on condition of component of steamer machine host.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of steam turbine Host Status maintenance sides
Method, which comprises the steps of:
The first step, the critical component for determining steamer machine host；
Steam turbine critical component includes rotatable parts, high temperature track, turbine shafting, steam turbine is through-flow；
Second step, preceding assessment；
The maintenance and technical supervision data in design data and steam turbine routine work provided according to manufactory, determines and turns
The high temperature bolt ultimate elongation of the intensity of dynamic component and high temperature track, service life weak part, operating temperature at 380 DEG C or more
Amount；
The determination of third step, state parameter；
According to the critical component of steamer machine host, state parameter needed for determining the evaluation of steam turbine Host Status；Steam turbine
State parameter needed for Host Status evaluation includes direct state parameter and indirect mode parameter；
Wherein, direct state parameter include the online measuring point real time data of power plant and power plant patrol the data that a calibrating phase uploads with
And performance test data；Indirect mode supplemental characteristic includes the performance parameter of steamer machine host critical component, service life, high temperature bolt
Creep elongation amount；
4th step, state parameter evaluation；
State parameter is divided into four kinds of states: normal condition, attention state, abnormality and serious shape according to numerical values recited
State；
For there is the state parameter of alarming value and chaser value, evaluation principle is as follows:
State parameter numerical value is less than 50 the percent of alarming value, and state parameter is in normal condition；
State parameter numerical value is more than or equal to 50 the percent of alarming value and is less than 90 the percent of alarming value, state ginseng
Number is in attention state；
State parameter numerical value is less than 90 the percent of chaser value, and state parameter is in abnormality；
State parameter numerical value is more than or equal to 90 the percent of chaser value, and state parameter is in severe conditions；
For the state parameter of no alarming value and chaser value, comprising: crack initiation life, high temperature bolt elongation, vapour
Turbine heat consumption, high pressure cylinder efficiency, IP efficiency, low pressure (LP) cylinder efficiency, evaluation principle are as follows:
1) crack initiation life
Crack initiation life loss is less than the 25% of entire life, and state parameter is in normal condition；
Crack initiation life loss is more than or equal to the 25% of entire life and less than the 50% of entire life, and state parameter is in note
Meaning state；
Crack initiation life loss is more than or equal to the 50% of entire life and less than the 75% of entire life, and state parameter is in different
Normal state；
Crack initiation life loss is more than or equal to the 75% of entire life, and state parameter is in severe conditions；
2) high temperature bolt elongation
High temperature bolt elongation is less than the 50% of ultimate elongation amount, and state parameter is in normal condition；
High temperature bolt elongation is more than or equal to the 50% of ultimate elongation amount and is less than the 75% of ultimate elongation amount, state parameter
In attention state；
High temperature bolt elongation is more than or equal to the 75% of ultimate elongation amount and is less than the 95% of ultimate elongation amount, state parameter
In abnormality；
High temperature bolt elongation is more than or equal to the 95% of ultimate elongation amount, and state parameter is in severe conditions；
3) thermal loss of steam turbine
Thermal loss of steam turbine ascending amount is less than 65KJ/KWh, and state parameter is in normal condition；
Thermal loss of steam turbine ascending amount is more than or equal to 65KJ/KWh and is less than 100KJ/KWh, and state parameter is in attention state；
Thermal loss of steam turbine ascending amount is more than or equal to 100KJ/KWh and is less than 150KJ/KWh, and state parameter is in abnormal shape
State；
Thermal loss of steam turbine ascending amount is more than or equal to 150KJ/KWh, and state parameter is in severe conditions；
4) high pressure cylinder efficiency
High pressure cylinder efficiency is dropped by less than 5%, and state parameter is in normal condition；
The decline of high pressure cylinder efficiency is more than or equal to 5% and less than 8%, and state parameter is in attention state；
The decline of high pressure cylinder efficiency is more than or equal to 8% and less than 10%, and state parameter is in abnormality；
The decline of high pressure cylinder efficiency is more than or equal to 10%, and state parameter is in severe conditions；
5) IP efficiency
IP efficiency is dropped by less than 4%, and state parameter is in normal condition；
IP efficiency decline is more than or equal to 4% and less than 6%, and state parameter is in attention state；
IP efficiency decline is more than or equal to 6% and less than 8%, and state parameter is in abnormality；
IP efficiency decline is more than or equal to 8%, and state parameter is in severe conditions；
6) low pressure (LP) cylinder efficiency
Low pressure (LP) cylinder efficiency is dropped by less than 2%, and state parameter is in normal condition；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 2% and less than 3%, and state parameter is in attention state；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 3% and less than 4%, and state parameter is in abnormality；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 4%, and state parameter is in severe conditions；
5th step, the evaluation of steam turbine Host Status；
The classification of steam turbine Host Status is identical as parameter state classification, that is, is divided into four classes: normal condition, attention state,
Abnormality and severe conditions；Comprehensive state evaluation is carried out to all state parameters, takes state worst in all state parameters
For steam turbine Host Status；
6th step, Strategies of Maintenance；
Steamer machine host different conditions correspond to different Strategies of Maintenance:
1) normal condition: steam turbine major engine overhaul cycle stretch-out 1 year；Within extended 1 year of time between overhauls(TBO), overall merit is still
For normal condition, then the steamer machine host time between overhauls(TBO) extends half a year again；
2) attention state: maintaining the steam turbine major engine overhaul period constant, reinforces monitoring, analyzes reason, takes preventative arrange
It applies；
3) abnormality: carrying out special analysis, based on the analysis results, arranges maintenance in due course；
4) severe conditions: maintenance down is arranged as early as possible.
Preferably, in the first step, rotatable parts include high pressure rotor and middle pressure rotor；High temperature track includes height
Press inner casing, IP inner casing, main steam valve, high voltage adjusting valve casing, middle pressure stop valve shell, reheat control valve shell, high-pressure inner cylinder
High temperature bolt, IP inner casing high temperature bolt；Turbine shafting includes shafting bearing, shafting bearing shell, shafting rotor, and steam turbine is through-flow
It is through-flow including high pressure cylinder, intermediate pressure cylinder is through-flow, low pressure (LP) cylinder is through-flow.
Preferably, in the third step, direct state parameter is specifically included:
1) performance parameter: thermal loss of steam turbine；
2) it vibrates: the bearing and bearing shell vibration of turbine shaft；
3) temperature: main steam and reheat steam temperature, high and medium voltage exhaust temperature, extraction temperature at different levels, lubricating oil temperature
Degree, bearing temperature；
4) pressure: main steam and reheated steam pressure, high and medium voltage exhaust steam pressure, extraction pressure at different levels.
Preferably, in the third step, indirect mode parameter is calculated by direct state parameter, the performance parameter packet
High pressure cylinder efficiency, IP efficiency, low pressure (LP) cylinder efficiency are included, the service life includes rotatable parts and high temperature track crack initiation
Service life.
The present invention also provides a kind of steam turbine Host Status examination and repair systems, it is characterised in that: uses above-mentioned steam turbine
Host Status repair method, the steam turbine Host Status examination and repair system include
For storing the operation data library of the online measuring point real time data of power plant；
The offline database that a calibrating phase uploads data and performance test data is patrolled for storing power plant；
For storing the Maintenance plan of power plant's maintenance and technical supervision data；
It is indirect needed for the evaluation of steam turbine Host Status for being calculated according to the data in operation data library and offline database
The indirect mode parameter calculation server of state parameter；
For according to the data and the calculating of indirect mode parameter in operation data library, offline database, Maintenance plan
The state evaluation server that the indirect mode parameter that server obtains evaluates steam turbine Host Status；
For the evaluation result according to state evaluation server, the Strategies of Maintenance clothes of corresponding overhaul of steam turbine strategy are provided
Business device.
Preferably, the operation data library, offline database, Maintenance plan, indirect mode parameter calculation server are equal
It is connect with state evaluation server, operation data library, offline database are connect with indirect mode parameter calculation server, state
Evaluation server is connect with Strategies of Maintenance server.
Method provided by the invention overcomes the deficiencies in the prior art, according to overhaul data, off-line data and online data,
The state parameter of steam turbine critical component is monitored, corresponding Strategies of Maintenance is taken according to steam turbine integrality, is realized
The repair based on condition of component of steamer machine host optimizes the time between overhauls(TBO) of steamer machine host, substantially increases the validity of overhaul of steam turbine
And reliability.
Detailed description of the invention
Fig. 1 is the block diagram of steam turbine Host Status examination and repair system of the present invention；
Fig. 2 is the flow chart of steam turbine Host Status repair method of the present invention；
Fig. 3 is computer software block diagram used by state evaluation server.
Specific embodiment
Present invention will be further explained below with reference to specific examples.
As shown in Figure 1, being the block diagram of steam turbine Host Status examination and repair system of the present invention, the steam turbine Host Status
Examination and repair system is commented by operation data library 1, offline database 2, Maintenance plan 3, indirect mode parameter calculation server 4, state
Valence server 5 and Strategies of Maintenance server 6 form, the data source in operation data library 1 in the online measuring point real time data of power plant, from
The data source of line database 2 patrols calibrating phase upload data and a performance test data in power plant, and the data of Maintenance plan 3 are come
Derived from power plant's maintenance and technical supervision data；Operation data library 1, offline database 2, Maintenance plan 3, indirect mode parameter meter
It calculates server 4 to connect with state evaluation server 5, operation data library 1, offline database 2 and indirect mode parameter, which calculate, to be taken
Business device 4 connects, and state evaluation server 5 is connect with Strategies of Maintenance server 6.
As shown in Fig. 2, being the flow chart of steam turbine Host Status repair method；As shown in figure 3, being state evaluation server
Computer software block diagram used by 5, the software installation are applied to state parameter and steam turbine on state evaluation server 5
The state evaluation of host entirety.The specific steps of steam turbine Host Status repair method are as follows:
The first step, the critical component for determining steamer machine host；
Steam turbine critical component mainly includes rotatable parts, high temperature track, turbine shafting, steam turbine is through-flow etc.,
Wherein rotatable parts include high pressure rotor and middle pressure rotor etc.；High temperature track includes high-pressure inner cylinder, IP inner casing, high pressure master
Steam valve shell, high voltage adjusting valve casing, middle pressure stop valve shell, reheat control valve shell, high-pressure inner cylinder high temperature bolt, IP inner casing high temperature spiral shell
Bolt etc.；Turbine shafting includes shafting bearing, shafting bearing shell, shafting rotor etc., pressure through-flow including high pressure cylinder, middle that steam turbine is through-flow
Cylinder is through-flow, low pressure (LP) cylinder is through-flow etc.；
Second step, preceding assessment；
According to design data and Maintenance plan data that manufactory provides, rotatable parts and high temperature track are determined
Intensity and service life weak part, operating temperature are in 380 DEG C or more high temperature bolt ultimate elongation amount etc.；
The input of third step, direct state parameter；
According to the critical component of steamer machine host, the state parameter of steamer machine host, the evaluation of steam turbine Host Status are determined
Required state parameter includes: direct state parameter and indirect mode parameter, wherein direct state parameter include online data and
Off-line data；Online data and off-line data derive from operation data library and offline database, and specific data include:
1) performance parameter: thermal loss of steam turbine etc.；
2) it vibrates: bearing and bearing shell vibration of turbine shaft etc.；
3) temperature: main steam and reheat steam temperature, high and medium voltage exhaust temperature, extraction temperature at different levels, lubricating oil temperature
Degree, bearing temperature etc.；
4) pressure: main steam and reheated steam pressure, high and medium voltage exhaust steam pressure, extraction pressure at different levels etc.；
The calculating of 4th step, indirect mode parameter；
It is calculated using online data and off-line data by indirect mode parameter calculation server using the prior art
To required indirect data, specifically include:
1) performance parameter: high pressure cylinder efficiency, IP efficiency, low pressure (LP) cylinder efficiency；
2) service life: rotatable parts and high temperature track crack initiation life；
3) high temperature bolt creep elongation amount；
5th step, state parameter evaluation；
The state of state parameter is divided into four kinds of states according to the size of status parameter values: normal condition, attention state, different
Normal state and severe conditions；
For there is the state parameter of alarming value and chaser value:
State parameter numerical value is less than 50 the percent of alarming value, and state parameter is in normal condition；
State parameter numerical value is less than 90 the percent of alarming value, and state parameter is in attention state；
State parameter numerical value is less than 90 the percent of chaser value, and state parameter is in abnormality；
State parameter numerical value is greater than 90 the percent of chaser value, and state parameter is in severe conditions；
For the state parameter of no alarming value and chaser value, crack initiation life, thermal loss of steam turbine, height are specifically included that
Cylinder pressure efficiency, IP efficiency, low pressure (LP) cylinder efficiency, operation sound etc., the evaluation principle of these parameter states is as follows:
1) crack initiation life
Crack initiation life loss is less than the 25% of entire life, and state parameter is in normal condition；
Crack initiation life loss is less than the 50% of entire life, and state parameter is in attention state；
Crack initiation life loss is less than the 75% of entire life, and state parameter is in abnormality；
Crack initiation life loss is more than or equal to the 75% of entire life, and state parameter is in severe conditions；
2) high temperature bolt elongation
High temperature bolt elongation is less than the 50% of ultimate elongation amount, and state parameter is in normal condition；
High temperature bolt elongation is less than the 75% of ultimate elongation amount, and state parameter is in attention state；
High temperature bolt elongation is less than the 90% of ultimate elongation amount, and state parameter is in abnormality；
High temperature bolt elongation is more than or equal to the 95% of ultimate elongation amount, and state parameter is in severe conditions；
3) thermal loss of steam turbine
Thermal loss of steam turbine ascending amount is less than 65KJ/KWh, and state parameter is in normal condition；
Thermal loss of steam turbine ascending amount is less than 100KJ/KWh, and state parameter is in attention state；
Thermal loss of steam turbine ascending amount is less than 150KJ/KWh, and state parameter is in abnormality；
Thermal loss of steam turbine ascending amount is more than or equal to 150KJ/KWh, and state parameter is in severe conditions；
4) high pressure cylinder efficiency
High pressure cylinder efficiency is dropped by less than 5%, and state parameter is in normal condition；
High pressure cylinder efficiency is dropped by less than 8%, and state parameter is in attention state；
High pressure cylinder efficiency is dropped by less than 10%, and state parameter is in abnormality；
The decline of high pressure cylinder efficiency is more than or equal to 10%, and state parameter is in severe conditions；
5) IP efficiency
IP efficiency is dropped by less than 4%, and state parameter is in normal condition；
IP efficiency is dropped by less than 6%, and state parameter is in attention state；
IP efficiency is dropped by less than 8%, and state parameter is in abnormality；
IP efficiency decline is more than or equal to 8%, and state parameter is in severe conditions；
6) low pressure (LP) cylinder efficiency
Low pressure (LP) cylinder efficiency is dropped by less than 2%, and state parameter is in normal condition；
Low pressure (LP) cylinder efficiency is dropped by less than 3%, and state parameter is in attention state；
Low pressure (LP) cylinder efficiency is dropped by less than 4%, and state parameter is in abnormality；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 4%, and state parameter is in severe conditions；
6th step, the evaluation of steam turbine Host Status；
State evaluation server carries out comprehensive state evaluation to all state parameters of input, steam turbine Host Status
Classify identical as parameter state classification, that is, is divided into four classes: normal condition, attention state, abnormality and severe conditions, steam turbine
Host Status is the state of most serious in all state parameters in state evaluation server；
7th step, Strategies of Maintenance；
Steamer machine host different conditions correspond to different Strategies of Maintenance:
1) normal condition: the steam turbine major engine overhaul period can extend 1 year.Within extended 1 year of time between overhauls(TBO), overall merit
It is still normal condition, then the steamer machine host time between overhauls(TBO) can also extend half a year；
2) attention state: maintaining the steam turbine major engine overhaul period constant, reinforces monitoring, analyzes reason, takes preventative arrange
It applies；
3) abnormality: carrying out special analysis, based on the analysis results, arranges maintenance in due course；
4) severe conditions: maintenance down is arranged as early as possible.
It is illustrated below with several specific embodiments.
Embodiment 1
The subcritical 300MW steam turbine of certain model continuous operation 3 years, should carry out large repairs on the 4th year according to schedule, according to
Evaluation to steamer machine host current state parameter, each state parameter of steam turbine is in " normal condition ", therefore steamer owner
The overall merit of machine state is " normal condition ", and the overhaul life of turbine body can extend 1 year.
Embodiment 2
Certain model ultra supercritical 660MW steam turbine continuous operation 4 years, should carry out large repairs on the 5th year according to schedule, root
According to the evaluation to steamer machine host current state parameter, thermal loss of steam turbine increases 95KJ/KWh, belongs to " attention state "；Other are each
State parameter is in " normal condition ", therefore the overall merit of steam turbine Host Status is " attention state ", turbine body
Overhaul life remain unchanged, preparation carried out large repairs in the 5th year.
Embodiment 3
Certain model ultra supercritical 1000MW steam turbine continuous operation 8 years should carry out primary big for manufacturer's recommended 12 years
It repairs, according to the evaluation to steamer machine host current state parameter, steam turbine high-pressure cylinder efficiency decline 9% belongs to " abnormality "；
No. 1 bolt elongate amount of intermediate pressure cylinder reaches the limit of the 74.2% of elongation, belongs to " attention state "；Other each state parameters are in
" normal condition ", therefore the overall merit of steam turbine Host Status is " abnormality ", the overhaul life of turbine body needs
Appropriate to shorten, preparation carried out large repairs in the 9th year.
Embodiment 4
The overcritical 350MW steam turbine of certain model continuous operation 3 years, should carry out large repairs on the 5th year according to schedule, according to
Evaluation to steamer machine host current state parameter, Turbine No.1 bear vibration amplitude rise suddenly, reach 235 μm, chaser value
It is 240 μm, No. 1 bear vibration amplitude reaches the 97.92% of chaser value, and Turbine No.1 bear vibration width belongs to " severe conditions "；
Although other each state parameters are in " normal condition ", the overall merit of steam turbine Host Status is " severe conditions ", due to
No. 1 bearing of this type, could open after needing steam turbine high-pressure cylinder to open cylinder, therefore turbine body arranges promptly in 1 month
Open cylinder overhaul.
Experiment shows using steam turbine Host Status repair method provided by the invention and system, according to overhaul data, from
Line number according to and online data, the state parameter of steam turbine critical component is monitored, is taken pair according to steam turbine integrality
The Strategies of Maintenance answered has reached the technical effect that steamer machine host realizes repair based on condition of component.
The above, only presently preferred embodiments of the present invention, not to the present invention in any form with substantial limitation,
It should be pointed out that under the premise of not departing from the method for the present invention, can also be made for those skilled in the art
Several improvement and supplement, these are improved and supplement also should be regarded as protection scope of the present invention.All those skilled in the art,
Without departing from the spirit and scope of the present invention, when made using disclosed above technology contents it is a little more
Dynamic, modification and the equivalent variations developed, are equivalent embodiment of the invention；Meanwhile all substantial technologicals pair according to the present invention
The variation, modification and evolution of any equivalent variations made by above-described embodiment, still fall within the range of technical solution of the present invention
It is interior.
Claims (6)
1. a kind of steam turbine Host Status repair method, which comprises the steps of:
The first step, the critical component for determining steamer machine host；
Steam turbine critical component includes rotatable parts, high temperature track, turbine shafting, steam turbine is through-flow；
Second step, preceding assessment；
The maintenance and technical supervision data in design data and steam turbine routine work provided according to manufactory, determines rotation section
The high temperature bolt ultimate elongation amount of the intensity of part and high temperature track, service life weak part, operating temperature at 380 DEG C or more；
The determination of third step, state parameter；
According to the critical component of steamer machine host, state parameter needed for determining the evaluation of steam turbine Host Status；Steamer machine host
State parameter needed for state evaluation includes direct state parameter and indirect mode parameter；
Wherein, direct state parameter includes that the online measuring point real time data of power plant and power plant patrol a data and property for calibrating phase upload
It can test data；Indirect mode supplemental characteristic includes the performance parameter of steamer machine host critical component, service life, high temperature bolt creep
Elongation；
4th step, state parameter evaluation；
State parameter is divided into four kinds of states: normal condition, attention state, abnormality and severe conditions according to numerical values recited；
For there is the state parameter of alarming value and chaser value, evaluation principle is as follows:
State parameter numerical value is less than 50 the percent of alarming value, and state parameter is in normal condition；
State parameter numerical value is more than or equal to 50 the percent of alarming value and less than 90 the percent of alarming value, at state parameter
In attention state；
State parameter numerical value is less than 90 the percent of chaser value, and state parameter is in abnormality；
State parameter numerical value is more than or equal to 90 the percent of chaser value, and state parameter is in severe conditions；
For the state parameter of no alarming value and chaser value, comprising: crack initiation life, high temperature bolt elongation, steam turbine
Heat consumption, high pressure cylinder efficiency, IP efficiency, low pressure (LP) cylinder efficiency, evaluation principle are as follows:
1) crack initiation life
Crack initiation life loss is less than the 25% of entire life, and state parameter is in normal condition；
Crack initiation life loss is more than or equal to the 25% of entire life and less than the 50% of entire life, and state parameter, which is in, pays attention to shape
State；
Crack initiation life loss is more than or equal to the 50% of entire life and less than the 75% of entire life, and state parameter is in abnormal shape
State；
Crack initiation life loss is more than or equal to the 75% of entire life, and state parameter is in severe conditions；
2) high temperature bolt elongation
High temperature bolt elongation is less than the 50% of ultimate elongation amount, and state parameter is in normal condition；
High temperature bolt elongation is more than or equal to the 50% of ultimate elongation amount and less than the 75% of ultimate elongation amount, and state parameter is in
Attention state；
High temperature bolt elongation is more than or equal to the 75% of ultimate elongation amount and less than the 90% of ultimate elongation amount, and state parameter is in
Abnormality；
High temperature bolt elongation is more than or equal to the 95% of ultimate elongation amount, and state parameter is in severe conditions；
3) thermal loss of steam turbine
Thermal loss of steam turbine ascending amount is less than 65KJ/KWh, and state parameter is in normal condition；
Thermal loss of steam turbine ascending amount is more than or equal to 65KJ/KWh and is less than 100KJ/KWh, and state parameter is in attention state；
Thermal loss of steam turbine ascending amount is more than or equal to 100KJ/KWh and is less than 150KJ/KWh, and state parameter is in abnormality；
Thermal loss of steam turbine ascending amount is more than or equal to 150KJ/KWh, and state parameter is in severe conditions；
4) high pressure cylinder efficiency
High pressure cylinder efficiency is dropped by less than 5%, and state parameter is in normal condition；
The decline of high pressure cylinder efficiency is more than or equal to 5% and less than 8%, and state parameter is in attention state；
The decline of high pressure cylinder efficiency is more than or equal to 8% and less than 10%, and state parameter is in abnormality；
The decline of high pressure cylinder efficiency is more than or equal to 10%, and state parameter is in severe conditions；
5) IP efficiency
IP efficiency is dropped by less than 4%, and state parameter is in normal condition；
IP efficiency decline is more than or equal to 4% and less than 6%, and state parameter is in attention state；
IP efficiency decline is more than or equal to 6% and less than 8%, and state parameter is in abnormality；
IP efficiency decline is more than or equal to 8%, and state parameter is in severe conditions；
6) low pressure (LP) cylinder efficiency
Low pressure (LP) cylinder efficiency is dropped by less than 2%, and state parameter is in normal condition；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 2% and less than 3%, and state parameter is in attention state；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 3% and less than 4%, and state parameter is in abnormality；
The decline of low pressure (LP) cylinder efficiency is more than or equal to 4%, and state parameter is in severe conditions；
5th step, the evaluation of steam turbine Host Status；
The classification of steam turbine Host Status is identical as parameter state classification, that is, is divided into four classes: normal condition, attention state, exception
State and severe conditions；Comprehensive state evaluation is carried out to all state parameters, taking state worst in all state parameters is vapour
Turbine Host Status；
6th step, Strategies of Maintenance；
Steamer machine host different conditions correspond to different Strategies of Maintenance:
1) normal condition: steam turbine major engine overhaul cycle stretch-out 1 year；Within extended 1 year of time between overhauls(TBO), overall merit is still positive
Normal state, then the steamer machine host time between overhauls(TBO) extends half a year again；
2) attention state: maintaining the steam turbine major engine overhaul period constant, reinforces monitoring, analyzes reason, takes preventive measure；
3) abnormality: carrying out special analysis, based on the analysis results, arranges maintenance in due course；
4) severe conditions: maintenance down is arranged as early as possible.
2. a kind of steam turbine Host Status repair method as described in claim 1, it is characterised in that: in the first step, turn
Dynamic component includes high pressure rotor and middle pressure rotor；High temperature track include high-pressure inner cylinder, IP inner casing, main steam valve,
High voltage adjusting valve casing, middle pressure stop valve shell, reheat control valve shell, high-pressure inner cylinder high temperature bolt, IP inner casing high temperature bolt；Steamer
Arbor system includes shafting bearing, shafting bearing shell, shafting rotor, and it includes that high pressure cylinder is through-flow, intermediate pressure cylinder is through-flow, low pressure that steam turbine is through-flow
Cylinder is through-flow.
3. a kind of steam turbine Host Status repair method as described in claim 1, it is characterised in that: in the third step, directly
State parameter is connect to specifically include:
1) performance parameter: thermal loss of steam turbine；
2) it vibrates: the bearing and bearing shell vibration of turbine shaft；
3) temperature: main steam and reheat steam temperature, high and medium voltage exhaust temperature, extraction temperature at different levels, lubricating oil temperature, axis
Hold temperature；
4) pressure: main steam and reheated steam pressure, high and medium voltage exhaust steam pressure, extraction pressure at different levels.
4. a kind of steam turbine Host Status repair method as described in claim 1, it is characterised in that: in the third step,
It connects state parameter to be calculated by direct state parameter, the performance parameter includes high pressure cylinder efficiency, IP efficiency, low pressure (LP) cylinder
Efficiency, the service life include rotatable parts and high temperature track crack initiation life.
5. a kind of steam turbine Host Status examination and repair system, it is characterised in that: using such as the described in any item vapour of Claims 1 to 4
Turbine Host Status repair method, the steam turbine Host Status examination and repair system include
For storing the operation data library (1) of the online measuring point real time data of power plant；
The offline database (2) that a calibrating phase uploads data and performance test data is patrolled for storing power plant；
For storing the Maintenance plan (3) of power plant's maintenance and technical supervision data；
Between being calculated needed for the evaluation of steam turbine Host Status according to the data of operation data library (1) and offline database (2)
Connect the indirect mode parameter calculation server (4) of state parameter；
For according to the data and indirect mode parameter in operation data library (1), offline database (2), Maintenance plan (3)
The state evaluation server (5) that the indirect mode parameter that calculation server (4) obtains evaluates steam turbine Host Status；
For the evaluation result according to state evaluation server (5), the Strategies of Maintenance clothes of corresponding overhaul of steam turbine strategy are provided
It is engaged in device (6).
6. a kind of steam turbine Host Status examination and repair system as claimed in claim 5, it is characterised in that: the operation data library
(1), offline database (2), Maintenance plan (3), indirect mode parameter calculation server (4) with state evaluation server
(5) it connects, operation data library (1), offline database (2) are connect with indirect mode parameter calculation server (4), state evaluation
Server (5) is connect with Strategies of Maintenance server (6).
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