CN106197233A - A kind of diaphragm deflection measures system - Google Patents

A kind of diaphragm deflection measures system Download PDF

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Publication number
CN106197233A
CN106197233A CN201610578322.3A CN201610578322A CN106197233A CN 106197233 A CN106197233 A CN 106197233A CN 201610578322 A CN201610578322 A CN 201610578322A CN 106197233 A CN106197233 A CN 106197233A
Authority
CN
China
Prior art keywords
cantilever
deflection
diaphragm deflection
dividing plate
measures
Prior art date
Application number
CN201610578322.3A
Other languages
Chinese (zh)
Inventor
邓志成
张恒涛
史进渊
汪勇
杨宇
危奇
Original Assignee
上海发电设备成套设计研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 上海发电设备成套设计研究院 filed Critical 上海发电设备成套设计研究院
Priority to CN201610578322.3A priority Critical patent/CN106197233A/en
Publication of CN106197233A publication Critical patent/CN106197233A/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/28Measuring arrangements characterised by the use of mechanical means for measuring roughness or irregularity of surfaces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/30Measuring arrangements characterised by the use of mechanical means for measuring the deformation in a solid, e.g. mechanical strain gauge

Abstract

The invention provides a kind of diaphragm deflection and measure system, including cantilever, post upper is connected with cantilever, cantilever is divided into one is long and the other is short two sections;One section of longer cantilever be provided with multiple can slide along cantilever, to adapt to the first metallic plate of the dividing plate of different-diameter, the first metallic plate is provided with can be with up-down adjustment, to adapt to the measuring instruments of the dividing plate of different-thickness;One section of shorter cantilever is provided with for installing balancing weight additional, to offset the second metallic plate of the measurement error that the amount of deflection of cantilever self causes.The system that the present invention provides overcomes the deficiencies in the prior art, a set of diaphragm deflection test system is used to replace original only with amesdial, diaphragm deflection being measured, counteract owing to stage body deforms the measurement error caused, substantially increase the accuracy that diaphragm deflection is measured.

Description

A kind of diaphragm deflection measures system
Technical field
The present invention relates to a kind of diaphragm deflection and measure system, belong to power station steam turbine technical field.
Background technology
Partition board of steam turbine is in operation and bears the pressure reduction of one level of flow passage component steam, large steam turbine steam flow Greatly, its baffle dimensions is big, and the power load that dividing plate bears is also big, and bigger pressure reduction can make dividing plate produce axial bending deformation, when every When plate amount of deflection is excessive, rotor or blade and dividing plate generation impact and rub can be caused, if diaphragm nozzle blade welding quality is bad, also Weld cracking can be caused, even cause dividing plate internal ring to drop accident, affect the safe operation of steam turbine, it is therefore necessary to ensure steamer Machine dividing plate has enough rigidity.
For ensureing that steam turbine does not produce impact and rub because diaphragm deflection is excessive, in addition to carrying out Theoretical Calculation, also Need the diaphragm deflection testing stand setting up steam turbine that the amount of deflection of dividing plate carries out test to measure, verify whether its rigidity conforms to Asking, the safe operation for large steam turbine provides scientific basis.
Traditional diaphragm deflection measuring test-bed, as it is shown in figure 1, be equipped with rest pad 2 on testing stand table top (frame) 1, Placing dividing plate 4 in supporting block 2, load post 6 and be placed on dividing plate 4, testing stand top is provided with upper cover 5, and measuring instruments (such as amesdial) 3 is straight Connecing and be fixed on testing stand table top (frame) 1, certainty of measurement is deformed by table top to be affected.Along with the increase of steam turbine power, vapour The size of turbine low pressure (LP) cylinder L O section constantly increases, and the maximum gauge of the low voltage partition plate of CAP1400 type steam turbine has reached 6.8 meters, the increase of dividing plate diameter causes the size of diaphragm deflection testing stand to increase therewith, for the ease of carrying out amount of deflection at the scene Testing experiment, diaphragm deflection testing stand has been made into detachable, and dividing plate stage body is spliced by polylith table top, it is difficult to ensure that every The rigidity of the measurement plane of plate flexure test platform and flatness.
In sum, using traditional measurement system, the certainty of measurement of diaphragm deflection cannot ensure, to this end, be badly in need of one New diaphragm deflection measures system, to improve the certainty of measurement of diaphragm deflection.
Summary of the invention
The technical problem to be solved in the present invention is how to improve large-size steam turbine diaphragm deflection testing stand diaphragm deflection to measure Precision.
In order to solve above-mentioned technical problem, the technical scheme is that a kind of diaphragm deflection of offer measures system, it is special Levy and be: include that cantilever, post upper are connected with cantilever, cantilever is divided into that one is long and the other is short two sections;
One section of longer cantilever is provided with multiple can slip, to adapt to the first metal of the dividing plate of different-diameter along cantilever Plate, the first metallic plate is provided with can be with up-down adjustment, to adapt to the measuring instruments of the dividing plate of different-thickness;
One section of shorter cantilever is provided with for installing balancing weight additional, to offset the measurement error that the amount of deflection of cantilever self causes The second metallic plate.
Preferably, described first metallic plate be provided with for fix described measuring instruments, can be with height up and down Dial framework.
Preferably, described first metallic plate is connected or magnetic adhesion with dial framework bolt.
Preferably, described measuring instruments is amesdial.
Preferably, described cantilever is Aluminum Hollow compo pipe.
Preferably, described support bar is connected with cantilever vertical.
Preferably, during use, dividing plate to be measured is located on testing stand table top, and testing stand platform is fixed in the lower end of support bar On face;Adjust the spacing of the first metallic plate and the height of measuring instruments so that it is adapt with dividing plate to be measured;Adjust the second gold medal Belong to the balancing weight weight on plate, to offset the amount of deflection of cantilever self;Simulate dividing plate by multiple jack applying pressure to be subject to Steam flow cause before and after pressure reduction, from measuring instruments read dividing plate diverse location amount of deflection.
The system that the present invention provides overcomes the deficiencies in the prior art, uses a set of diaphragm deflection test system to replace original Only with amesdial, diaphragm deflection is measured, counteract owing to stage body deforms the measurement error that causes, substantially increase every The accuracy of board deflection metrology.
Accompanying drawing explanation
Fig. 1 is traditional diaphragm deflection measuring test-bed structural representation;
The diaphragm deflection that Fig. 2 provides for the present invention measures system structure schematic diagram;
The diaphragm deflection that Fig. 3 provides for the present invention measures system position view on testing stand.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, people in the art The present invention can be made various changes or modifications by member, and these equivalent form of values fall within the application appended claims equally and limited Scope.
Fig. 2 measures system structure schematic diagram for the diaphragm deflection that the present invention provides, and described diaphragm deflection measures system bag Including support bar 11 and cantilever 12, support bar 11 is fixed on cantilever 12, and one is long and the other is short for the cantilever 12 at fixing point two ends.
Longer one end cantilever is fitted with multiple first metallic plate 13, and the first metallic plate 13 is fixed with dial framework 14, table Equipped with measuring instruments (such as amesdial) 3 on frame 14.The effect of dial framework 14 be make measuring instruments 3 fixed thereon can on move down Dynamic, to adapt to the deflection metrology of the dividing plate of different-thickness.First metallic plate 13 can be connected with dial framework 14, it is also possible to adopts Link together by modes such as magnetic adhesion.First metallic plate 13 can slide axially along cantilever, with adapt to different-diameter every The deflection metrology of plate.
Shorter one end cantilever is fitted with the second metallic plate 15, the second metallic plate 15 can install balancing weight additional, to support The measurement error that the amount of deflection of cantilever self that disappears causes.
Support bar 11 needs enough rigidity.
Cantilever 12 can use the aluminium-alloy pipe of diameter hollow, in order to increases the rigidity of cantilever, alleviates the weight of cantilever, Avoid the measurement error caused because of cantilever bending as far as possible.
The diaphragm deflection that Fig. 3 provides for the present invention measures system position view on testing stand, when measuring diaphragm deflection, The lower end of the support bar 11 that diaphragm deflection measures system is fixed on testing stand table top 1, and the first metallic plate 13 moves to measure Position, after measuring instruments 3 is contained on dial framework 14, dial framework 14 is fixed on the first metallic plate 13, by multiple very heavy Applying pressure in top 16 simulate pressure reduction before and after the steam flow that dividing plate is subject to causes, and read dividing plate 4 diverse location from measuring instruments 3 Amount of deflection.
This diaphragm deflection test system can arrange many sets, occurs the most in pairs, generally, and a diaphragm deflection examination Test, at least need 6 set diaphragm deflection test systems, to measure the deflection value of dividing plate different parts, different angles.
The effect of the present invention is described below in detail with two specific examples.
Embodiment 1
Need to carry out a diameter of 5.2m of the simulation test dividing plate of deflection test, thickness is 0.07m, and what dividing plate applied is total Power is 2894kN.
The dismountable diaphragm deflection testing stand using traditional mesa diameter to be 7m, through test, this dividing plate maximum is scratched Degree is 1.73mm, and the deflection that measurement obtains corresponding position testing stand table top is 0.29mm, the mistake that testing stand facial disfigurement causes Difference reaches 16.8%.
Using diaphragm deflection of the present invention to measure system, eliminate the error that testing stand facial disfigurement causes, certainty of measurement improves 16.8%.
Embodiment 2
Need to carry out a diameter of 0.66m of certain model turbine high-pressure first order dividing plate of deflection test, thickness is 0.3m, The total power applied on dividing plate is 2990kN.
The dismountable diaphragm deflection testing stand using traditional mesa diameter to be 7m, through test, this dividing plate maximum is scratched Degree is 0.90mm, and the deflection that measurement obtains corresponding position testing stand table top is 0.22mm, the mistake that testing stand facial disfigurement causes Difference reaches 24.4%.
Using diaphragm deflection of the present invention to measure system, eliminate the error that testing stand facial disfigurement causes, certainty of measurement improves 24.4%.
To sum up, for dismountable diaphragm deflection testing stand of traditional a diameter of 7m in entablement face, owing to stage body is very big, platform The flatness in face and the deflection of table top are very big on certainty of measurement impact, if using original test system, measurement error is non- Chang great, therefore, for large-scale diaphragm deflection testing stand, diaphragm deflection of the present invention measures system can eliminate the shadow of stage body deformation Ring, be greatly improved the certainty of measurement of diaphragm deflection.

Claims (7)

1. a diaphragm deflection measures system, it is characterised in that: including cantilever (12), support bar (11) upper end is with cantilever (12) even Connect, cantilever (12) is divided into that one is long and the other is short two sections;
One section of longer cantilever (12) is provided with multiple can be slided along cantilever (12), to adapt to the first of the dividing plate of different-diameter Metallic plate (13), the first metallic plate (13) is provided with can be with up-down adjustment, to adapt to the measuring instruments of the dividing plate of different-thickness (3);
One section of shorter cantilever (12) is provided with for installing balancing weight additional, to offset the measurement that the amount of deflection of cantilever (12) self causes Second metallic plate (15) of error.
2. a kind of diaphragm deflection as claimed in claim 1 measures system, it is characterised in that: set on described first metallic plate (13) Have for fix described measuring instruments (3), can be with the dial framework (14) of height up and down.
3. a kind of diaphragm deflection as claimed in claim 2 measures system, it is characterised in that: described first metallic plate (13) and table Frame (14) bolt connects or magnetic adhesion.
4. a kind of diaphragm deflection as claimed in claim 1 measures system, it is characterised in that: described measuring instruments (3) is thousand points Table.
5. a kind of diaphragm deflection as claimed in claim 1 measures system, it is characterised in that: described cantilever (12) is that Aluminum Hollow is closed Jin Guan.
6. a kind of diaphragm deflection as claimed in claim 1 measures system, it is characterised in that: described support bar (11) and cantilever (12) vertically connect.
7. a kind of diaphragm deflection as claimed in claim 1 measures system, it is characterised in that: during use, dividing plate to be measured sets On testing stand table top, the lower end of support bar (11) is fixed on testing stand table top;Adjust the first metallic plate (13) spacing and The height of measuring instruments (3) so that it is adapt with dividing plate to be measured;Adjust the balancing weight weight on the second metallic plate (15), To offset the amount of deflection of cantilever (12) self;Apply pressure by multiple jack (16) and simulate what the steam flow that dividing plate is subject to caused Pressure reduction front and back, reads the amount of deflection of dividing plate diverse location from measuring instruments (3).
CN201610578322.3A 2016-07-21 2016-07-21 A kind of diaphragm deflection measures system CN106197233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610578322.3A CN106197233A (en) 2016-07-21 2016-07-21 A kind of diaphragm deflection measures system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610578322.3A CN106197233A (en) 2016-07-21 2016-07-21 A kind of diaphragm deflection measures system

Publications (1)

Publication Number Publication Date
CN106197233A true CN106197233A (en) 2016-12-07

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Family Applications (1)

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CN201610578322.3A CN106197233A (en) 2016-07-21 2016-07-21 A kind of diaphragm deflection measures system

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201662384U (en) * 2010-03-26 2010-12-01 江苏扬力数控机床有限公司 Rotary-disk large-surface measuring device
CN101936699A (en) * 2010-08-24 2011-01-05 中国科学院光电技术研究所 Swing arm type three-dimensional contourgraph
CN102042792A (en) * 2009-11-20 2011-05-04 杭州福朗机电科技有限公司 Electric lifting stator inner cavity cyclometer
CN204594405U (en) * 2015-04-23 2015-08-26 麦斯克电子材料有限公司 A kind of planeness measuring apparatus of monocrystalline silicon piece grinding nog plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042792A (en) * 2009-11-20 2011-05-04 杭州福朗机电科技有限公司 Electric lifting stator inner cavity cyclometer
CN201662384U (en) * 2010-03-26 2010-12-01 江苏扬力数控机床有限公司 Rotary-disk large-surface measuring device
CN101936699A (en) * 2010-08-24 2011-01-05 中国科学院光电技术研究所 Swing arm type three-dimensional contourgraph
CN204594405U (en) * 2015-04-23 2015-08-26 麦斯克电子材料有限公司 A kind of planeness measuring apparatus of monocrystalline silicon piece grinding nog plate

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Application publication date: 20161207