CN110359969A - A kind of naval vessel steamer engine speed control method - Google Patents
A kind of naval vessel steamer engine speed control method Download PDFInfo
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- CN110359969A CN110359969A CN201810494550.1A CN201810494550A CN110359969A CN 110359969 A CN110359969 A CN 110359969A CN 201810494550 A CN201810494550 A CN 201810494550A CN 110359969 A CN110359969 A CN 110359969A
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- thermal stress
- steamer
- rotor
- speed
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/81—Modelling or simulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/02—Purpose of the control system to control rotational speed (n)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a kind of naval vessel steamer engine speed control method, include the following steps: to establish steamer Speed Regulating System for Marine Diesel Engine model, rotor thermal stress model；Steamer host actual speed, back pressure, vapor (steam) temperature real-time parameter are acquired, calculates the real-time thermal stress of steamer main rotor using rotor thermal stress model；By the real-time thermal stress of obtained rotor compared with rotor thermal stress allowable, the rotation speed change rate under critical thermal stress conditions is obtained, formulates revolving speed restriction strategy, realizes the limitation to steamer engine speed.It can guarantee to realize revolving speed quick response engine room orders under the premise of rotor thermal stress does not transfinite, promote the mobility on naval vessel when steamer host acceleration or deceleration manipulates using the method for the present invention.
Description
Technical field
The invention belongs to ship's powerplant control technology field more particularly to a kind of naval vessel steamer engine speed controlling parties
Method.
Background technique
Naval vessel, to avoid rotor Thermal Fatigue Damage, is set when plus/minus speed manipulates by the engine room orders that bridge remote control carriage clock issues
Determine tach signal, be first sent to plus/minus speed link, realize plus/minus rate limit, advises engine room orders setting speed by the operation of host
Rule variation allows setting speed quickly to change, then answers a little slower variation in middling speed area, further limit in high velocity in low regime
Rotation speed change rate.But current rotor thermal stress can not be measured directly, rotation speed change rate be limited generally according to experience, if fast
Rate is too fast, will cause the fatigue crack of rotor part, or even fracture；If rate is excessively slow, naval vessel mobility will affect.Obviously,
This experience control mode was it is difficult to ensure that steamer host not only can guarantee that rotor thermal stress did not transfinited, but also energy when plus/minus speed manipulates
Realize that revolving speed quickly tracks engine room orders.
The present invention builds steamer main rotor thermal stress model under MATLAB/Simulink environment, utilizes steamer host
Actual speed, vapor (steam) temperature, back pressure real-time parameter calculate the real-time thermal stress of rotor, compared with rotor thermal stress allowable, obtain
Relative speed variation under critical thermal stress conditions allowable realizes the limit to steamer engine speed to formulate revolving speed restriction strategy
System.It can realize that revolving speed quickly tracks engine room orders under the premise of steamer main rotor thermal stress does not transfinite, promote naval vessel mobility.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of naval vessel steamer engine speed control methods, it is ensured that vapour
Wheel main rotor thermal stress realizes that revolving speed quickly tracks engine room orders under the premise of not transfiniting, and promotes naval vessel mobility.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of naval vessel steamer engine speed controlling party
Method, this method comprises the following steps:
Step 1 establishes steamer Speed Regulating System for Marine Diesel Engine model, rotor thermal stress model；
Step 2 obtains steamer host actual speed, back pressure, vapor (steam) temperature real-time parameter, calculates steamer using model
The real-time thermal stress of main rotor；
Step 3 calculates critical by the obtained real-time thermal stress of steamer main rotor compared with rotor thermal stress allowable
Rotation speed change rate under thermal stress allowable formulates revolving speed restriction strategy, realizes the limitation to steamer engine speed.
According to the above technical scheme, in the step 1, rotor thermal stress model is established specifically, obtaining by FEM calculation
Relation data between rotor surface temperature and vapor (steam) temperature, heat flow density and thermal stress, by MATLAB System Identification Toolbox
Pick out the discrete transfer function between rotor surface temperature-vapor (steam) temperature, heat flow density-thermal stress.
According to the above technical scheme, the steamer host actual speed is stern tube shaft revolving speed, and setting range is 0~300rpm.
According to the above technical scheme, rotor thermal stress σ allowable, calculation formula are as follows:
In formula: σ '0.2The yield limit of-corresponding temperature, value 530MPa；n0.2- safety coefficient, being worth is 2.2.
According to the above technical scheme, in the step 3, steps are as follows for rotation speed change rate calculations:
1., steamer host stern tube shaft revolving speed setting range is 0~300rpm to step, and revolving speed is divided into every 20rpm for one section
15 sections, relative speed variation is set as ai；Because rotor thermal stress variation is obvious when rotation speed change is more than 20rpm.
2., to every section of revolving speed step emulates in steamer main rotor thermal stress model, steamer host is at a certain section
When speed interval plus/minus speed, the variation of turbine rotor thermal stress is observed, when the real-time thermal stress of rotor is answered lower than rotor heat allowable
Power, directly output setting speed；If the real-time thermal stress of rotor is higher than rotor thermal stress allowable, will exceed the time is set as t1, it is used for
The rate limit of next this section of rotation speed change, obtains rotation speed change rate a1；
Step 3., by rotation speed change rate a1Applied in revolving speed limitation, if meeting the real-time thermal stress of rotor lower than rotor
Thermal stress allowable exports relative speed variation a1-1If real-time thermal stress is higher than thermal stress allowable, obtain beyond thermal stress vapour allowable
Take turns host runing time t2With rotation speed change rate a2；
4. according to step 2., step 3. similarly successively obtain a3, a4…ai, until steamer host is in every section of plus/minus speed process
In meet the real-time thermal stress of rotor lower than rotor thermal stress allowable, export rotation speed change rate ai-1。
According to the above technical scheme, each boost phase rotation speed change speed of steamer host is adjusted repeatedly using rotor thermal stress model
Rate makes the real-time thermal stress of each revolving speed of steamer host meet restrictive condition, obtains corresponding acceleration restriction strategy, realizes to steamer
The limitation of engine speed.
The beneficial effect comprise that: first, having a safety feature: steamer main rotor thermal stress can not be direct at present
Measurement when steamer host plus/minus speed manipulates, if rate is too fast, will cause the Thermal Fatigue Damage of rotor part, or even fracture.This
Invention calculates steamer main rotor using model by obtaining steamer host actual speed, back pressure, vapor (steam) temperature real-time parameter
Real-time thermal stress, it is ensured that steamer host is run below thermal stress allowable, to promote steamer Host Security performance.
Second, naval vessel mobility can be promoted: for excessive, the usual root that occurs thermic load when avoiding steamer host emergency manoeuvre
Naval vessel mobility certainly will be will affect if rate is excessively slow according to experience limitation acceleration and deceleration rate.Present invention can ensure that steamer host
Engine room orders revolving speed is quickly tracked under the premise of rotor thermal stress does not transfinite, and promotes the mobility on naval vessel.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is naval vessel of embodiment of the present invention steamer engine speed control method schematic diagram:
Fig. 2 is steamer main rotor thermal stress model；
Fig. 3 is steamer engine speed limitation flow chart.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
In the embodiment of the present invention, a kind of naval vessel steamer engine speed control method is provided, as shown in Figure 1, this method includes
Following steps:
Step 1 establishes steamer Speed Regulating System for Marine Diesel Engine model, rotor thermal stress model；
Step 2 obtains steamer host actual speed, back pressure, vapor (steam) temperature real-time parameter, calculates steamer using model
The real-time thermal stress of main rotor；
Step 3 calculates critical by the obtained real-time thermal stress of steamer main rotor compared with rotor thermal stress allowable
Rotation speed change rate under thermal stress allowable formulates revolving speed restriction strategy, realizes the limitation to steamer engine speed.
According to the above technical scheme, in the step 1, as shown in Fig. 2, establishing rotor thermal stress model specifically, by having
The relation data between rotor surface temperature and vapor (steam) temperature, heat flow density and thermal stress is calculated in limit member, by MATLAB system
Identification toolbox picks out the discrete transfer function between rotor surface temperature-vapor (steam) temperature, heat flow density-thermal stress.
According to the above technical scheme, the steamer host actual speed is stern tube shaft revolving speed, and setting range is 0~300rpm.
According to the above technical scheme, rotor thermal stress σ allowable, calculation formula are as follows:
In formula: σ '0.2The yield limit of-corresponding temperature, value 530MPa；n0.2- safety coefficient, being worth is 2.2.
According to the above technical scheme, in the step 3, steps are as follows for rotation speed change rate calculations:
1., steamer host stern tube shaft revolving speed setting range is 0~300rpm to step, and revolving speed is divided into every 20rpm for one section
15 sections, relative speed variation is set as ai；Because rotor thermal stress variation is obvious when rotation speed change is more than 20rpm.
2., to every section of revolving speed step emulates in steamer main rotor thermal stress model, steamer host is at a certain section
When speed interval plus/minus speed, the variation of turbine rotor thermal stress is observed, when the real-time thermal stress of rotor is answered lower than rotor heat allowable
Power, directly output setting speed；If the real-time thermal stress of rotor is higher than rotor thermal stress allowable, will exceed the time is set as t1, it is used for
The rate limit of next this section of rotation speed change, obtains rotation speed change rate a1；
Step 3., by rotation speed change rate a1Applied in revolving speed limitation, if meeting the real-time thermal stress of rotor lower than rotor
Thermal stress allowable exports relative speed variation a1-1If real-time thermal stress is higher than thermal stress allowable, obtain beyond thermal stress vapour allowable
Take turns host runing time t2With rotation speed change rate a2；
4. according to step 2., step 3. similarly successively obtain a3, a4…ai, until steamer host is in every section of plus/minus speed process
In meet the real-time thermal stress of rotor lower than rotor thermal stress allowable, export rotation speed change rate ai-1, as shown in Figure 3.
According to the above technical scheme, each boost phase rotation speed change speed of steamer host is adjusted repeatedly using rotor thermal stress model
Rate makes the real-time thermal stress of each revolving speed of steamer host meet restrictive condition, obtains corresponding acceleration restriction strategy, realizes to steamer
The limitation of engine speed.
Table 1
Each revolving speed section accelerates restriction strategy table as shown in table 1.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (6)
1. a kind of naval vessel steamer engine speed control method, which is characterized in that this method comprises the following steps:
Step 1 establishes steamer Speed Regulating System for Marine Diesel Engine model, rotor thermal stress model；
Step 2 obtains steamer host actual speed, back pressure, vapor (steam) temperature real-time parameter, calculates steamer host using model
The real-time thermal stress of rotor；
Step 3 calculates critical allowable by the obtained real-time thermal stress of steamer main rotor compared with rotor thermal stress allowable
Rotation speed change rate under thermal stress formulates revolving speed restriction strategy, realizes the limitation to steamer engine speed.
2. steamer engine speed control method in naval vessel according to claim 1, which is characterized in that in the step 1, build
Vertical rotor thermal stress model is specifically, obtain rotor surface temperature and vapor (steam) temperature, heat flow density and heat by FEM calculation
Relation data between stress picks out rotor surface temperature-vapor (steam) temperature, heat flow density-by MATLAB System Identification Toolbox
Discrete transfer function between thermal stress.
3. steamer engine speed control method in naval vessel according to claim 1 or 2, which is characterized in that the steamer host
Actual speed is stern tube shaft revolving speed, and setting range is 0~300rpm.
4. steamer engine speed control method in naval vessel according to claim 1 or 2, which is characterized in that the rotor is allowable
Thermal stress σ, calculation formula are as follows:
In formula: σ '0.2The yield limit of-corresponding temperature, value 530MPa；n0.2- safety coefficient, being worth is 2.2.
5. steamer engine speed control method in naval vessel according to claim 1 or 2, which is characterized in that in the step 3,
Steps are as follows for rotation speed change rate calculations:
1., steamer host stern tube shaft revolving speed setting range is 0~300rpm to step, and revolving speed is divided into 15 with every 20rpm for one section
Section, relative speed variation are set as ai；
2., to every section of revolving speed step emulates in steamer main rotor thermal stress model, steamer host is in a certain section of speed
When the plus/minus speed of section, observe turbine rotor thermal stress variation, when the real-time thermal stress of rotor be lower than rotor thermal stress allowable,
Directly export setting speed；If the real-time thermal stress of rotor is higher than rotor thermal stress allowable, will exceed the time is set as t1, for next time
The rate limit of this section of rotation speed change obtains rotation speed change rate a1；
Step 3., by rotation speed change rate a1Applied in revolving speed limitation, if meeting the real-time thermal stress of rotor lower than rotor heat allowable
Stress exports relative speed variation a1-1If real-time thermal stress is higher than thermal stress allowable, obtain beyond thermal stress steamer host allowable
Runing time t2With rotation speed change rate a2；
4. according to step 2., step 3. similarly successively obtain a3, a4…ai, until steamer host is full during every section of plus/minus is fast
The sufficient real-time thermal stress of rotor is lower than rotor thermal stress allowable, exports rotation speed change rate ai-1。
6. steamer engine speed control method in naval vessel according to claim 5, which is characterized in that utilize rotor thermal stress mould
Type adjusts each boost phase rotation speed change rate of steamer host repeatedly, and the real-time thermal stress of each revolving speed of steamer host is made to meet limitation
Condition obtains corresponding acceleration restriction strategy, realizes the limitation to steamer engine speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494550.1A CN110359969B (en) | 2018-05-22 | 2018-05-22 | Method for controlling rotating speed of main engine of steam turbine of ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494550.1A CN110359969B (en) | 2018-05-22 | 2018-05-22 | Method for controlling rotating speed of main engine of steam turbine of ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110359969A true CN110359969A (en) | 2019-10-22 |
| CN110359969B CN110359969B (en) | 2021-07-20 |
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| CN201810494550.1A Active CN110359969B (en) | 2018-05-22 | 2018-05-22 | Method for controlling rotating speed of main engine of steam turbine of ship |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040051794A (en) * | 2002-12-13 | 2004-06-19 | 주식회사 포스코 | A Method for Controlling Turbine Speed on Turbine Start |
| JP2005291083A (en) * | 2004-03-31 | 2005-10-20 | Toshiba Plant Systems & Services Corp | Turbine acceleration indication manual start-up device and manual start-up method |
| JP2006291725A (en) * | 2005-04-05 | 2006-10-26 | Tokyo Electric Power Co Inc:The | Apparatus and method for calculating operation condition of thermal fluid and computer program |
| CN102650219A (en) * | 2012-05-31 | 2012-08-29 | 上海电气电站设备有限公司 | 1000 MW ultra-supercritical unit automatic control system |
| CN103233787A (en) * | 2013-05-07 | 2013-08-07 | 上海发电设备成套设计研究院 | Thermal stress estimating method for throttle-governed steam turbine rotor |
-
2018
- 2018-05-22 CN CN201810494550.1A patent/CN110359969B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040051794A (en) * | 2002-12-13 | 2004-06-19 | 주식회사 포스코 | A Method for Controlling Turbine Speed on Turbine Start |
| JP2005291083A (en) * | 2004-03-31 | 2005-10-20 | Toshiba Plant Systems & Services Corp | Turbine acceleration indication manual start-up device and manual start-up method |
| JP2006291725A (en) * | 2005-04-05 | 2006-10-26 | Tokyo Electric Power Co Inc:The | Apparatus and method for calculating operation condition of thermal fluid and computer program |
| CN102650219A (en) * | 2012-05-31 | 2012-08-29 | 上海电气电站设备有限公司 | 1000 MW ultra-supercritical unit automatic control system |
| CN103233787A (en) * | 2013-05-07 | 2013-08-07 | 上海发电设备成套设计研究院 | Thermal stress estimating method for throttle-governed steam turbine rotor |
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| CN110359969B (en) | 2021-07-20 |
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