CN105626168B - The tightness monitoring method and system of steam turbine hot jacket ring high-pressure inner cylinder - Google Patents
The tightness monitoring method and system of steam turbine hot jacket ring high-pressure inner cylinder Download PDFInfo
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- CN105626168B CN105626168B CN201610107417.7A CN201610107417A CN105626168B CN 105626168 B CN105626168 B CN 105626168B CN 201610107417 A CN201610107417 A CN 201610107417A CN 105626168 B CN105626168 B CN 105626168B
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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
- 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
- F01D21/003—Arrangements for testing or measuring
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- 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
- F05D2260/80—Diagnostics
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- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention provides a kind of monitoring method and system of the tightness of steam turbine hot jacket ring high-pressure inner cylinder, monitoring system includes database server, calculation server, web page server and user terminal browser.The chord length on hot jacket ring between two measuring points when dispatching from the factory is calculated first；The chord length on hot jacket ring between two measuring points is measured in service stage, overhaul, if creep and relaxation cause the chord length on steam turbine hot jacket ring between two measuring points to reduce, shows that the tightness monitoring of high-pressure inner cylinder is unqualified；By increasing the spacer thickness between hot jacket ring and high-pressure inner cylinder, ensure the chord change value after steam turbine overhaul on hot jacket ring between two measuring points not less than the chord change value between two measuring points on hot jacket ring before and after hot jacket first, the tightness of steam turbine hot jacket ring high-pressure inner cylinder is set to be in slave mode, the technique effect of the tightness of control vapour hot jacket ring high-pressure inner cylinder is reached, the safe and economical operation for steam turbine hot jacket ring high-pressure inner cylinder provides foundation.
Description
Technical field
The present invention relates to the tightness monitoring method and system of steam turbine hot jacket ring high-pressure inner cylinder, belong to steam turbine technology neck
Domain.
Background technology
Steam turbine uses the cylinder type high-pressure inner cylinder of hot jacket ring, and high-pressure inner cylinder split is without extended flange, compact conformation, outside
Cylinder diameter reduces.Using several steel hot jacket rings by the cylinder of the two halves up and down lock ring of high-pressure inner cylinder into a cylinder, its feature
Thermal stress is small when being starting, shutdown and load change.During the use of steam turbine, due to steam inlet pipe both sides hot jacket ring with
And the operating temperature of the hot jacket ring of high temperature section is high, occur creep and relaxation, high-pressure inner cylinder with the growth hot jacket ring of run time
Split tightness is deteriorated, it is possible to occur leakage vapour.If the tightness monitoring of steam turbine hot jacket ring high-pressure inner cylinder is improper, it can cause
High-pressure inner cylinder leaks vapour, influences to be badly in need of the tight of steam turbine hot jacket ring high-pressure inner cylinder in the safe and economical operation of steam turbine, engineering
Property monitoring method.
General Electric of Sweden-Blang-Bo Weili joint-stock companies have applied for that patent of invention " is used for the receipts of extraction turbine
Contracting ring wheel ", application number 99108029.7 gives new construction of the steam turbine using the cavity that draws gas of hot jacket ring high-pressure inner cylinder.Breathe out
Your shore steam turbine plant Co., Ltd has applied for utility model patent " steam turbine sleeve type cylinder hot jacket ring heater ",
Application number 201520555006.5, gives the suit of cylinder hot jacket ring and the heater of dismounting.But in the design of steam turbine
Stage and service stage, the tightness monitoring of steam turbine hot jacket ring high-pressure inner cylinder are also available without suitable method.
The content of the invention
The technical problem to be solved in the present invention is how to realize the tightness monitoring of steam turbine hot jacket ring high-pressure inner cylinder.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of steam turbine hot jacket ring high-pressure inner cylinder
Tightness monitoring method, it is characterised in that this method is comprised the steps of：
The first step, the Poisson's ratio v for obtaining High Pressure Inner Cylinder of Steam Turbine hot jacket ring material at room temperature；
The measurement data of second step, the high-pressure inner cylinder for obtaining manufactory and hot jacket ring, including：
Cylinder inside radius R before the hot jacket first of High Pressure Inner Cylinder of Steam Turbine suit hot jacket ring portion positiona, first before hot jacket
Cylinder outer radius Rb1, hot jacket ring inside radius R first before hot jacketb2, hot jacket ring outer radius R first before hot jacketc, hot jacket
Measuring point radius R on ringt, chord length L on hot jacket ring first before hot jacket between two measuring points0, hot jacket first after hot jacket
Chord length L on ring between two measuring points1；
3rd step, the changing value Y for calculating chord length first before and after hot jacket on hot jacket ring between two measuring points0：
The changing value Y of chord length before and after hot jacket on hot jacket ring between two measuring points first0Calculation formula be：
Y0=L1-L0 (1)
4th step, the initial interference δ for calculating hot jacket ring design0：
The initial interference δ of high-pressure inner cylinder hot jacket ring design0Calculation formula be：
δ0=Rb1-Rb2 (2)
5th step, the magnitude of interference δ for calculating hot jacket ringi：
To the pad for installing different-thickness between cylinder outer radius and hot jacket ring inside radius additional, thickness is HiI-th of pad
The magnitude of interference δ of corresponding hot jacket ringiCalculation formula be：
δi=δ0+Hi (3)
6th step, the layering radius R for calculating hot jacket ring after hot jacketb：
After high-pressure inner cylinder hot jacket, the layering radius R of cylinder and hot jacket ringbCalculation formula be：
7th step, calculating measuring point radial displacement ui：
Magnitude of interference δiCorresponding measuring point radial displacement uiCalculation formula be：
In formula：
δi--- thickness is HiThe corresponding hot jacket ring of i-th of pad the magnitude of interference；
RaCylinder inside radius before the hot jacket first of --- --- suit hot jacket ring portion position；
Rb--- the layering radius of high-pressure inner cylinder hot jacket exhaust casing and hot jacket ring；
Rc--- the hot jacket ring outer radius before hot jacket first；
Rt--- the measuring point radius on hot jacket ring；
V --- the Poisson's ratio of hot jacket ring material at room temperature；
8th step, calculate chord length Y between hot jacket latter two measuring pointi：
Magnitude of interference δiChord length Y between latter two measuring point of corresponding hot jacketiCalculation formula be：
Chord change value X between 9th step, two measuring points of calculatingi：
Magnitude of interference δiChord change value X between corresponding two measuring pointsiCalculation formula be：
Xi=Yi-Y0 (7)
Tenth step, determine Proportional coefficient K：
For n group data (δi, Xi), using linear regression method, show that linear function is expressed as：
δi=A+KXi (8)
In formula：
A --- regression constant；
K --- proportionality coefficient；
11st step, the newly-increased spacer thickness Δ δ of calculatingi：
Show that the proportion function of increment is expressed as by formula (8)：
Δδi=K × Δ Xi (9)
In formula：
Δδi--- newly-increased spacer thickness；
ΔXi--- newly-increased spacer thickness Δ δiCorresponding chord length increment；
The chord length of two measuring points on hot jacket ring is measured in 12nd step, overhaul：
In steam turbine overhaul, the chord length L between the first two measuring point of hot jacket ring dismounting is measured2After being removed with hot jacket ring
Chord length L between two measuring points3；
The changing value Y of chord length before and after 13rd step, calculating hot jacket ring are removed on hot jacket ring between two measuring points：
After operation, in steam turbine overhaul, hot jacket ring removes the chord length between two measuring points on front and rear hot jacket ring
Changing value Y calculation formula is：
Y=L2-L3 (10)
14th step, the monitoring of the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
In steam turbine overhaul：
(1) if Y >=Y0, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is qualified, shows that steam turbine uses hot jacket ring
High-pressure inner cylinder tightness is in slave mode, and the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness terminates；
(2) if Y ＜ Y0, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is unqualified, shows to need in overhaul pair
Steam turbine is adjusted using the spacer thickness of hot jacket ring and high-pressure inner cylinder, into the 15th step；
The knots modification Δ X of the changing value of chord length in 15th step, calculating hot jacket ring between two measuring points：
In steam turbine overhaul, the changing value Y of the chord length on hot jacket ring between two measuring points0And Y difference Δ X calculating is public
Formula is：
Δ X=Y0-Y (11)
In formula：
Y0--- the chord change value before and after hot jacket on hot jacket ring between two measuring points first；
Y --- the chord change value before and after hot jacket ring is removed in overhaul on hot jacket ring between two measuring points；
The optimal control measure of 16th step, the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
In steam turbine overhaul, the optimal control measure of the tightness of steam turbine hot jacket ring high-pressure inner cylinder is exactly：To
The hot jacket ring for occurring creep and relaxation ensures high-pressure inner cylinder by increasing the spacer thickness between hot jacket ring and high-pressure inner cylinder
Tightness, the calculation formula for answering increased spacer thickness Δ H between steam turbine hot jacket ring and high-pressure inner cylinder again is：
Δ H=K × Δ X (12)
In formula：
K --- proportionality coefficient.
As needed, result of calculation and the optimization of the tightness monitoring of steam turbine hot jacket ring high-pressure inner cylinder can be printed out
Control measure.
Preferably, in the first step, the material trademark of High Pressure Inner Cylinder of Steam Turbine hot jacket ring is obtained first, then by material
The trade mark determines the Poisson's ratio v of High Pressure Inner Cylinder of Steam Turbine hot jacket ring material at room temperature.
Preferably, in the 5th step, the thickness of the different pads installed additional between cylinder outer radius and hot jacket ring inside radius
Degree is respectively 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm.
Preferably, in the 12nd step, using the string between the first two measuring point of vernier caliper measurement hot jacket ring dismounting
Chord length L between latter two measuring point of long L2 and hot jacket ring dismounting3。
Present invention also offers a kind of tightness monitoring system of steam turbine hot jacket ring high-pressure inner cylinder, using above-mentioned steamer
The tightness monitoring method of machine hot jacket ring high-pressure inner cylinder, it is characterised in that：Including database server, calculation server, webpage
Server and user terminal browser, by measurement data input database server related in the monitoring method, database clothes
Business device connection calculation server, calculation server is calculated according to the computational methods of setting, calculation server connection webpage clothes
Business device, web page server connection user terminal browser, passes through user terminal browser and shows the tight of steam turbine hot jacket ring high-pressure inner cylinder
The result of calculation of close property monitoring and optimal control measure.
The monitoring method and system of the tightness for the steam turbine hot jacket ring high-pressure inner cylinder that the present invention is provided, realize steam turbine
The quantitative assessment of the tightness of hot jacket ring high-pressure inner cylinder and use monitoring.Two are measured on hot jacket ring in service stage, overhaul
Chord length between measuring point, if creep and relaxation cause the chord length on steam turbine hot jacket ring between two measuring points to reduce, shows height
Press the tightness monitoring of inner casing unqualified；By increasing the spacer thickness between hot jacket ring and high-pressure inner cylinder, it is ensured that steam turbine is big
The chord change value on rear hot jacket ring between two measuring points is repaiied not less than between two measuring points on hot jacket ring before and after hot jacket first
Chord change value, makes the tightness of steam turbine hot jacket ring high-pressure inner cylinder be in slave mode, has reached control vapour hot jacket ring high pressure
The technique effect of the tightness of inner casing, the safe and economical operation for steam turbine hot jacket ring high-pressure inner cylinder provides foundation.
Brief description of the drawings
Fig. 1 is the block diagram of the tightness monitoring system of steam turbine hot jacket ring high-pressure inner cylinder of the present invention；
Fig. 2 is the flow chart of the tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder of the present invention；
Fig. 3 is the computer software block diagram that calculation server of the present invention is used；
Fig. 4 is the structural representation of certain model 600MW steam turbine hot jacket rings and high-pressure inner cylinder；
Fig. 5 is the front view of chord length between two measuring points on hot jacket ring；
Fig. 6 is the top view of chord length between two measuring points on hot jacket ring；
Fig. 7 is the side view of chord length between two measuring points on hot jacket ring；
Fig. 8 is second hot jacket ring pad magnitude of interference δ of certain model 600MW High Pressure Inner Cylinder of Steam TurbineiWith chord change value Xi's
Variation diagram.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Fig. 1 is the block diagram of the tightness monitoring system of steam turbine hot jacket ring high-pressure inner cylinder of the present invention, described steam turbine
The monitoring system of the tightness monitoring system of hot jacket ring high-pressure inner cylinder includes slide measure 1, database server 2, calculates service
Device 3, web page server 4 and user terminal browser 5, the sized data input database server 2 that slide measure 1 is measured, data
Storehouse server 2 connects calculation server 3, and the connection web page server 4 of calculation server 3, the connection user terminal of web page server 4 is browsed
Store the Poisson's ratio v of hot jacket ring material in device 5, database server 1, the hot jacket first of high-pressure inner cylinder suit hot jacket ring portion position it
Preceding cylinder inside radius Ra, cylinder outer radius R first before hot jacketb1, hot jacket ring inside radius R first before hot jacketb2, first
Hot jacket ring outer radius R before hot jacketc, measuring point radius R on hot jacket ringt, on hot jacket ring first before hot jacket two measuring points it
Between chord length L0, chord length L on hot jacket ring first after hot jacket between two measuring points1, slide measure is used in steam turbine overhaul
Measure the chord length L between the first two measuring point of hot jacket ring dismounting2Chord length L between latter two measuring point of hot jacket ring dismounting3。
As shown in Fig. 2 being the flow chart of institute's use method of the invention, as shown in figure 3, being steam turbine hot jacket ring high-pressure inner cylinder
The computer software block diagram that the calculation server of tightness monitoring is used, the software installation is in steam turbine hot jacket ring high-pressure inner cylinder
Tightness monitoring calculation server on, applied to steam turbine hot jacket ring high-pressure inner cylinder tightness monitor.
Illustrate the present invention below in conjunction with concrete application example.
The structure of certain model Supercritical 600 MW Steam Turbine, hot jacket ring and high-pressure inner cylinder as shown in Figure 4 to 7,11 in Fig. 4,
12 ... 17 seven hot jacket rings of expression first and second ....In the service stage of this steam turbine, the overhaul after running 10 years
In, the method shown in system, Fig. 2 shown in application drawing 1 and the computer software shown in Fig. 3 carry out the steam turbine hot jacket ring high
Press the tightness monitoring of inner casing.In the use 20Cr1Mo1VNbTiB steel of the steam turbine hot jacket ring material, this turbine high-pressure
Cylinder has 7 hot jacket rings, and the present embodiment carries out tightness monitoring to the corresponding cylinder position of second hot jacket ring.This steam turbine
The tightness monitored results of the corresponding high-pressure inner cylinder of two hot jacket rings are listed in Tables 1 and 2.
The steam turbine has been run 10 years, and the monitoring method of the tightness of its hot jacket ring high-pressure inner cylinder is specially：The first step,
Input the material trademark of high-pressure inner cylinder hot jacket ring：
The material trademark 20Cr1Mo1VNbTiB of High Pressure Inner Cylinder of Steam Turbine hot jacket ring is inputted, by material trademark
20Cr1Mo1VNbTiB determines the Poisson's ratio v=0.27 of High Pressure Inner Cylinder of Steam Turbine hot jacket ring material at room temperature；
The measurement data of second step, the high-pressure inner cylinder for inputting manufactory and hot jacket ring：
The High Pressure Inner Cylinder of Steam Turbine for inputting manufactory's measurement is set with before the hot jacket first of second hot jacket ring portion position
Cylinder inside radius Ra, cylinder outer radius R first before hot jacketb1, hot jacket ring inside radius R first before hot jacketb2, hot jacket first
Hot jacket ring outer radius R beforec, measuring point radius R on hot jacket ringt, on hot jacket ring first before hot jacket between two measuring points
Chord length L0, chord length L on hot jacket ring first after hot jacket between two measuring points1, specific measurement data is listed in table 1；
The high-pressure inner cylinder of the manufactory of table 1 and the measurement data of hot jacket ring
3rd step, the changing value Y for calculating chord length first before and after hot jacket on hot jacket ring between two measuring points0：
The changing value Y of chord length before and after hot jacket on hot jacket ring between two measuring points first0Calculation formula and result be：
Y0=L1-L0=310.53-310.29=0.24mm (13)
4th step, the initial interference δ for calculating hot jacket ring design0：
The initial interference δ of high-pressure inner cylinder hot jacket ring design0Calculation formula and result be：
δ0=Rb1-Rb2=641.935-641.465=0.47mm (14)
5th step, the magnitude of interference δ for calculating hot jacket ringi：
Given spacer thickness H different between cylinder outer radius and hot jacket ring inside radiusiRespectively 0,0.1,0.2,0.3,
0.4th, the magnitude of interference δ of the corresponding hot jacket ring of 0.5,0.6,0.7 and 0.8, different spacer thickness HiiCalculation formula be：
δi=δ0+Hi (15)
Layering radius R after 6th step, calculating hot jacket ring hot jacketb：
After high-pressure inner cylinder hot jacket, the layering radius R of cylinder and hot jacket ringbCalculation formula be：
7th step, calculating measuring point radial displacement ui：
Different magnitude of interference δiCorresponding measuring point radial displacement uiCalculation formula be：
In formula：
δi--- the magnitude of interference
Ra--- the cylinder inside radius before the hot jacket first of suit hot jacket ring portion position
Rb--- the layering radius of high-pressure inner cylinder hot jacket exhaust casing and hot jacket ring
Rc--- the hot jacket ring outer radius before hot jacket first
Rt--- the measuring point radius on hot jacket ring
V --- the Poisson's ratio of hot jacket ring material at room temperature；
8th step, calculate chord length Y between hot jacket latter two measuring pointi：
I-th of magnitude of interference δiChord length Y between latter two measuring point of corresponding hot jacketiCalculation formula be：
Chord change value X between 9th step, two measuring points of calculatingi：
I-th of magnitude of interference δiChord change value X between corresponding two measuring pointsiCalculation formula be：
Xi=Yi-Y0 (19)
The result of 5th step to the 9th step of steam turbine hot jacket ring high-pressure inner cylinder tightness monitoring is listed in table 2；
The result of calculation of above-mentioned 5th step to the 9th step of the different-thickness pad of table 2
Tenth step, determine Proportional coefficient K：
For n groups (δi, Xi), using the linear regression method of prior art, draw regression constant A=0.0012, proportionality coefficient
K=3.095, second hot jacket ring pad magnitude of interference δiWith chord change value XiVariation diagram as shown in figure 8, linearity of regression function
It is expressed as：
δi=A+KXi (20)
In formula：
A --- linear regression constant
K --- proportionality coefficient；
11st step, the newly-increased spacer thickness Δ δ of calculatingi：
Show that the proportion function of increment is expressed as by formula (20)：
Δδi=K × Δ Xi (21)
In formula：
Δδi--- newly-increased spacer thickness
ΔXi--- newly-increased spacer thickness Δ δiCorresponding chord length increment；
The chord length of two measuring points on hot jacket ring is measured in 12nd step, overhaul：
In steam turbine overhaul, using the chord length L between the first two measuring point of vernier caliper measurement hot jacket ring dismounting2=
Chord length L between 310.66mm and latter two measuring point of hot jacket ring dismounting3=310.56mm, the sized data of vernier caliper measurement
Input database server；
The changing value Y of chord length before and after 13rd step, calculating hot jacket ring are removed on hot jacket ring between two measuring points：
After running after a while, in steam turbine overhaul, before and after hot jacket ring is removed on hot jacket ring between two measuring points
The changing value Y calculation formula of chord length be：
Y=L2-L3=310.66-310.56=0.10mm (22)
14th step, the monitoring of the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
It is red for steam turbine using the monitoring system of steam turbine hot jacket ring high-pressure inner cylinder tightness in steam turbine overhaul
Collar high-pressure inner cylinder tightness is controlled：
(1) if Y >=Y0, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is qualified, shows that steam turbine uses hot jacket ring
High-pressure inner cylinder tightness is in slave mode, and the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness terminates, into the 17th step；
(2) due to Y=0.10mm ＜ Y0=0.24mm, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is unqualified,
Show to need to be adjusted steam turbine using the spacer thickness of hot jacket ring and high-pressure inner cylinder in overhaul, into the 15th step；
The knots modification Δ X of the changing value of chord length in 15th step, calculating hot jacket ring between two measuring points：
In steam turbine overhaul, the changing value Y of the chord length on hot jacket ring between two measuring points0And Y difference Δ X calculating is public
Formula is：
Δ X=Y0-Y1=0.24-0.10=0.14mm (23)
In formula：
Y0--- the chord change value before and after hot jacket on hot jacket ring between two measuring points first
Y --- the chord change value before and after hot jacket ring is removed in overhaul on hot jacket ring between two measuring points；
The optimal control measure of 16th step, the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
In steam turbine overhaul, the optimal control measure of the tightness of steam turbine hot jacket ring high-pressure inner cylinder, is exactly to
The hot jacket ring for occurring creep and relaxation ensures high-pressure inner cylinder by increasing the spacer thickness between hot jacket ring and high-pressure inner cylinder
Tightness, the calculation formula for answering increased spacer thickness Δ H between steam turbine hot jacket ring and high-pressure inner cylinder again is：
Δ H=K × Δ X=3.095 × 0.14=0.43mm (24)
In formula：
K --- proportionality coefficient；
17th step, printout result：
The result of calculation of the tightness monitoring of printout steam turbine hot jacket ring high-pressure inner cylinder and optimal control as needed
Measure.
The 600MW steam turbine hot jacket ring high-pressure inner cylinders, because second hot jacket ring is operated in high-temperature region, after running 10 years
Generation creep and relaxation, cause the monitoring of the high-pressure inner cylinder tightness of second hot jacket ring portion position in overhaul unqualified, take
Optimal control measure be by the new total cost spacer thickness 0.43mm between hot jacket ring and high-pressure inner cylinder, it is ensured that steam turbine
Chord change value after overhaul on second hot jacket ring between two measuring points is not less than two surveys on hot jacket ring before and after hot jacket first
Chord change value between point, makes the tightness of the corresponding high-pressure inner cylinder of second hot jacket ring of the steam turbine be in slave mode,
Safe and economical operation for the 600MW steam turbine hot jacket ring high-pressure inner cylinders provides foundation.
Claims (5)
1. a kind of tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder, this method is comprised the steps of：
The first step, the Poisson's ratio ν for obtaining High Pressure Inner Cylinder of Steam Turbine hot jacket ring material at room temperature；
Characterized in that,
The measurement data of second step, the high-pressure inner cylinder for obtaining manufactory and hot jacket ring, including：
Cylinder inside radius R before the hot jacket first of High Pressure Inner Cylinder of Steam Turbine suit hot jacket ring portion positiona, vapour first before hot jacket
Cylinder outer radius Rb1, hot jacket ring inside radius R first before hot jacketb2, hot jacket ring outer radius R first before hot jacketc, on hot jacket ring
Measuring point radius Rt, chord length L on hot jacket ring first before hot jacket between two measuring points0, on hot jacket ring first after hot jacket
Chord length L between two measuring points1；
3rd step, the changing value Y for calculating chord length first before and after hot jacket on hot jacket ring between two measuring points0：
The changing value Y of chord length before and after hot jacket on hot jacket ring between two measuring points first0Calculation formula be：
Y0=L1-L0 (1)
4th step, the initial interference δ for calculating hot jacket ring design0：
The initial interference δ of high-pressure inner cylinder hot jacket ring design0Calculation formula be：
δ0=Rb1-Rb2 (2)
5th step, the magnitude of interference δ for calculating hot jacket ringi：
To the pad for installing different-thickness between cylinder outer radius and hot jacket ring inside radius additional, thickness is HiI-th of pad it is corresponding
The magnitude of interference δ of hot jacket ringiCalculation formula be：
δi=δ0+Hi (3)
6th step, the layering radius R for calculating hot jacket ring after hot jacketb：
After high-pressure inner cylinder hot jacket, the layering radius R of cylinder and hot jacket ringbCalculation formula be：
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Magnitude of interference δiCorresponding measuring point radial displacement uiCalculation formula be：
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<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula：
δi--- thickness is HiThe corresponding hot jacket ring of i-th of pad the magnitude of interference；
Ra--- the cylinder inside radius before the hot jacket first of suit hot jacket ring portion position；
Rb--- the layering radius of high-pressure inner cylinder hot jacket exhaust casing and hot jacket ring；
Rc--- the hot jacket ring outer radius before hot jacket first；
Rt--- the measuring point radius on hot jacket ring；
ν --- the Poisson's ratio of hot jacket ring material at room temperature；
8th step, calculate chord length Y between hot jacket latter two measuring pointi：
Magnitude of interference δiChord length Y between latter two measuring point of corresponding hot jacketiCalculation formula be：
<mrow>
<msub>
<mi>Y</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>R</mi>
<mi>t</mi>
</msub>
<mo>+</mo>
<msub>
<mi>u</mi>
<mi>i</mi>
</msub>
</mrow>
<msub>
<mi>R</mi>
<mi>t</mi>
</msub>
</mfrac>
<msub>
<mi>Y</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</mrow>
Chord change value X between 9th step, two measuring points of calculatingi：
Magnitude of interference δiChord change value X between corresponding two measuring pointsiCalculation formula be：
Xi=Yi-Y0 (7)
Tenth step, determine Proportional coefficient K：
For n group data (δi, Xi), using linear regression method, show that linear function is expressed as：
δi=A+KXi (8)
In formula：
A --- regression constant；
K --- proportionality coefficient；
11st step, the newly-increased spacer thickness Δ δ of calculatingi：
Show that the proportion function of increment is expressed as by formula (8)：
Δδi=K × Δ Xi (9)
In formula：
Δδi--- newly-increased spacer thickness；
ΔXi--- newly-increased spacer thickness Δ δiCorresponding chord length increment；
The chord length of two measuring points on hot jacket ring is measured in 12nd step, overhaul：
In steam turbine overhaul, the chord length L between the first two measuring point of hot jacket ring dismounting is measured2With hot jacket ring dismounting latter two
Chord length L between measuring point3；
The changing value Y of chord length before and after 13rd step, calculating hot jacket ring are removed on hot jacket ring between two measuring points：
After operation, in steam turbine overhaul, the change of the chord length before and after hot jacket ring is removed on hot jacket ring between two measuring points
Value Y calculation formula is：
Y=L2-L3 (10)
14th step, the monitoring of the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
In steam turbine overhaul：
(1) if Y >=Y0, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is qualified, shows steam turbine using in hot jacket ring high pressure
Cylinder tightness is in slave mode, and the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness terminates；
(2) if Y ＜ Y0, the monitoring of steam turbine hot jacket ring high-pressure inner cylinder tightness is unqualified, shows to need to steam turbine in overhaul
It is adjusted using the spacer thickness of hot jacket ring and high-pressure inner cylinder, into the 15th step；
The knots modification Δ X of the changing value of chord length in 15th step, calculating hot jacket ring between two measuring points：
In steam turbine overhaul, the changing value Y of the chord length on hot jacket ring between two measuring points0And Y difference Δ X calculation formula is：
Δ X=Y0-Y (11)
In formula：
Y0--- the chord change value before and after hot jacket on hot jacket ring between two measuring points first；
Y --- the chord change value before and after hot jacket ring is removed in overhaul on hot jacket ring between two measuring points；
The optimal control measure of 16th step, the tightness of steam turbine hot jacket ring high-pressure inner cylinder：
In steam turbine overhaul, the optimal control measure of the tightness of steam turbine hot jacket ring high-pressure inner cylinder is exactly：To having occurred and that
The hot jacket ring of creep and relaxation ensures the tight of high-pressure inner cylinder by increasing the spacer thickness between hot jacket ring and high-pressure inner cylinder
Property, the calculation formula for answering increased spacer thickness Δ H between steam turbine hot jacket ring and high-pressure inner cylinder again is：
Δ H=K × Δ X (12)
In formula：
K --- proportionality coefficient.
2. a kind of tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder as claimed in claim 1, it is characterised in that：Institute
State in the first step, the material trademark of High Pressure Inner Cylinder of Steam Turbine hot jacket ring is obtained first, is then determined at room temperature by material trademark
The Poisson's ratio ν of High Pressure Inner Cylinder of Steam Turbine hot jacket ring material.
3. a kind of tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder as claimed in claim 1, it is characterised in that：Institute
State in the 5th step, the thickness of the different pads installed additional between cylinder outer radius and hot jacket ring inside radius be respectively 0mm, 0.1mm,
0.2mm、0.3mm、0.4mm、0.5mm、0.6mm、0.7mm、0.8mm。
4. a kind of tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder as claimed in claim 1, it is characterised in that：Institute
State in the 12nd step, using the chord length L between the first two measuring point of vernier caliper measurement hot jacket ring dismounting2It is removed with hot jacket ring
Chord length L between latter two measuring point3。
5. a kind of tightness monitoring system of steam turbine hot jacket ring high-pressure inner cylinder, using as described in any one of Claims 1 to 4
The tightness monitoring method of steam turbine hot jacket ring high-pressure inner cylinder, it is characterised in that：Including database server, calculation server,
Web page server and user terminal browser, by measurement data input database server related in the monitoring method, data
Storehouse server connection calculation server, calculation server is calculated according to the computational methods of setting, calculation server connection net
Page server, web page server connection user terminal browser, steam turbine hot jacket ring high-pressure inner cylinder is shown by user terminal browser
Tightness monitoring result of calculation and optimal control measure.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239178A (en) * | 1998-06-15 | 1999-12-22 | 瑞典通用电气－布朗－博韦里股份公司 | Shrink ring for turbine with bleeding |
| CN204771366U (en) * | 2015-07-28 | 2015-11-18 | 哈尔滨汽轮机厂有限责任公司 | Red lantern ring heating device of steam turbine suit formula cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1744017A1 (en) * | 2005-07-14 | 2007-01-17 | Siemens Aktiengesellschaft | Combined steam turbine and method for operating a combined steam turbine |
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2016
- 2016-02-26 CN CN201610107417.7A patent/CN105626168B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239178A (en) * | 1998-06-15 | 1999-12-22 | 瑞典通用电气－布朗－博韦里股份公司 | Shrink ring for turbine with bleeding |
| CN204771366U (en) * | 2015-07-28 | 2015-11-18 | 哈尔滨汽轮机厂有限责任公司 | Red lantern ring heating device of steam turbine suit formula cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 大功率汽轮机筒形内缸的强度和汽密性分析;刘东旗等;《东方电气评论》;20150625;第29卷(第114期);第25页 * |
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