CN110208125A - A kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method - Google Patents
A kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method Download PDFInfo
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- CN110208125A CN110208125A CN201910532846.2A CN201910532846A CN110208125A CN 110208125 A CN110208125 A CN 110208125A CN 201910532846 A CN201910532846 A CN 201910532846A CN 110208125 A CN110208125 A CN 110208125A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009661 fatigue test Methods 0.000 claims abstract description 80
- 238000005299 abrasion Methods 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000003542 behavioural effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The present invention relates to fatigue test field, specifically a kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method.Sheet fatigue testing specimen is vertically arranged between the intracorporal tired fixture of autoclave, the leptoprosopy of positioning groove difference face sheet fatigue testing specimen two sides in two support bases, support plate is installed respectively, support plate is the I-shaped structure that the parallel opposite vertically oriented flange in by-level face and the horizontal plane two sides is combined into one in each positioning groove；Abrasion pressure head is installed on the outer end in support plate by-level face, a leptoprosopy of the outer surface face sheet fatigue testing specimen of each abrasion pressure head；It is symmetrical arranged rod-shaped spring carrier arm on the locating flange of support plate two sides, the spring carrier arm of two support plate same sides is connected by extension spring.The present invention is used to accurately apply the secondary normal pressure between fatigue testing specimen of friction, fretting fatigue performance of the evaluation structure material in high temperature and pressure water environment in high temperature and pressure water environment.
Description
Technical field
The present invention relates to fatigue test field, specifically a kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its
Application method, for accurately apply in high temperature and pressure water environment friction it is secondary with fatigue testing specimen (such as: sheet fatigue testing specimen, rodlike
Fatigue testing specimen) between normal pressure, fretting fatigue performance of the evaluation structure material in high temperature and pressure water environment.
Background technique
Fretting fatigue failure of the structural material under high-temperature high-pressure water solution (200~360 DEG C, 4~20MPa) environment
It is one of the major issue of Nuclear Power Industry field face.There is quite a few structural damage accident to have in nuclear power station with fretting damage
Direct relation, if the heat-transfer pipe in steam generator is both critical component and weak element.Steam generator heat-transfer pipe is made
For isolation one, the border components of secondary circuit, operational reliability requires very high.However, the thin-wall construction rigidity of heat-transfer pipe is lower,
And there are small gap between heat-transfer pipe and support plate, anti-vibration bar, when equipment is run under Flow vibration excitation heat-transfer pipe and branch
There is mutual collision and sliding a little between board, anti-vibration bar, a possibility that increasing fretting damage and fail.Simultaneously as shutdown/
Heap, thermally stratified layer, Flow vibration etc. are opened, causes heat-transfer pipe by corrosion fatigue damage.Therefore, fretting fatigue damage is steam
One of main potential failure form of generator heat-transfer pipe.Currently, a kind of patent " corrosion fatigue examination with high temperature and pressure recirculated water
Experiment device (publication number CN102346114A) " is mainly for structural material high-temperature high pressure water corrosion fatigue behavioral study, patent " one
Kind high-temperature high-pressure in-situ fretting wear experimental rig " (publication number CN104359778A) is mainly for structural material high-temperature high pressure water
Fretting wear research, can not achieve structural material high-temperature high pressure water fretting fatigue behavioral study.
Summary of the invention
The purpose of the present invention is to provide a kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method,
Solve the problems, such as that normal pressure accurately applies between fatigue testing specimen and abrasion pressure head during high-temperature high pressure water fretting fatigue testing.
The technical scheme is that
A kind of high-temperature high pressure water fretting fatigue normal pressure bringing device, the device include: sheet fatigue testing specimen, fatigue folder
Tool, support plate, support base, connecting screw, extension spring, spring carrier arm, column, sample stage, adapter, loading axis, high pressure
Autoclave body, high pressure kettle cover, abrasion pressure head, positioning groove, locating flange, specific structure are as follows:
Autoclave body back-off is covered in autoclave, and the intracorporal column of autoclave is fixed on autoclave and covers, and sample stage is fixed
At the top of column；Sheet fatigue testing specimen is vertically arranged between the intracorporal tired fixture of autoclave, and sheet fatigue testing specimen upper end is logical
It crosses tired fixture to connect with sample stage, sheet fatigue testing specimen lower end passes through tired fixture and connect with adapter, the bottom of adapter
With the load axis connection for passing through high pressure kettle cover；
Two support bases pass through vertically arranged connecting screw respectively and are fixed on sample stage, and two support bases are symmetrical
It is set to the two sides of sheet fatigue testing specimen；The opposite flank of two support bases opens up horizontal positioning groove respectively, and two fixed
Position groove is symmetrical arranged, the leptoprosopy of the positioning groove difference face sheet fatigue testing specimen two sides in two support bases, Mei Geding
Support plate is installed respectively in the groove of position, support plate is that by-level face and the horizontal plane two sides are parallel opposite vertically oriented convex
The I-shaped structure that edge is combined into one；
Abrasion pressure head is installed on the outer end in support plate by-level face, the outer surface face sheet fatigue of each abrasion pressure head
One leptoprosopy of sample；Rod-shaped spring carrier arm is symmetrical arranged on the locating flange of each support plate two sides, extension spring is two,
Each extension spring connects the spring carrier arm of two support plate same sides.
The high-temperature high pressure water fretting fatigue normal pressure bringing device, the intracorporal column side of being connected through a screw thread of autoclave
Formula is fixed on autoclave and covers, and the mode that sample stage is connected through a screw thread is fixed at the top of column.
The high-temperature high pressure water fretting fatigue normal pressure bringing device, the upper end of each connecting screw is fixed by nut
In on sample stage, the lower end of each connecting screw is connect with support base, and the top surface of each support base vertically opens up and determines
The threaded hole that position groove communicates, support base are connect by threaded hole with connecting screw.
The high-temperature high pressure water fretting fatigue normal pressure bringing device, the thickness in support plate by-level face and positioning are recessed
The height of slot is identical, and support plate is in be slidably matched with positioning groove；The locating flange of each support plate two sides is adjacent to support base
Former and later two opposite flanks, the distance between two relative positioning flange inners are of same size with positioning groove, make to support
Plate is move freely in positioning groove depth direction, and support plate is formed and is fitted close in short transverse and width direction limitation activity.
The high-temperature high pressure water fretting fatigue normal pressure bringing device wears pressure head by tightening bolt and is installed on support
The outer end in plate by-level face.
The high-temperature high pressure water fretting fatigue normal pressure bringing device, spring carrier arm, which is connected through a screw thread, is installed on support
On the locating flange of plate, the axis of symmetrically arranged two spring carrier arms is overlapped, and opens up annular groove on each spring carrier arm, each
The both ends of extension spring are separately connected the annular groove of spring carrier arm, and the pulling force that extension spring deformation generates makes to be installed in support plate
Abrasion pressure head contacted with sheet fatigue testing specimen.
The high-temperature high pressure water fretting fatigue normal pressure bringing device, positioning groove center face sheet fatigue testing specimen mark
Away from section center.
The application method of the high-temperature high pressure water fretting fatigue normal pressure bringing device, includes the following steps:
(1) column is connected through a screw thread mode with high pressure kettle cover to tighten, is connected column and sample stage using clamping nut
It connects；Loading axis passes through high pressure kettle cover, and seals loading axis and high pressure kettle cover by sealing ring, by the upper end of adapter and loading axis
Connection；
(2) sheet fatigue testing specimen is clamped using tired fixture, is connected through a screw thread mode, the upper end of tired fixture and sample
The lower end of platform connection, tired fixture passes through adapter and load axis connection；
(3) connecting screw is connect with support base, connecting screw is fixed on sample stage using thread connecting mode,
And connecting screw position is adjusted, so that the positioning groove in support base is faced the leptoprosopy of sheet fatigue testing specimen, and positioning groove
Center and the gauge length section center of sheet fatigue testing specimen maintain an equal level；
(4) utilization is tightened bolt and is installed on pressure head is worn in support plate, and spring carrier arm is installed in support plate, will be propped up
Fagging is installed in positioning groove；
(5) according to fretting fatigue test in normal pressure size between sheet fatigue testing specimen and abrasion pressure head, selection is suitable
Extension spring specification, extension spring is installed on spring carrier arm；
(6) high pressure kettle cover and autoclave body are sealed, injects high-temperature high pressure water, carry out the examination of high-temperature high pressure water fretting fatigue
It tests.
The application method of the high-temperature high pressure water fretting fatigue normal pressure bringing device is deformed using extension spring and is generated
Pulling force, make to wear pressure head and contacted with the leptoprosopy of sheet fatigue testing specimen, and generate normal pressure；The extension spring of support plate two sides is advised
Lattice are identical, and deformation is identical, and the tensile stress of generation is identical；The coefficient of elasticity of spring, accurate control abrasion are measured in target temperature
Normal pressure between pressure head and sheet fatigue testing specimen.
The application method of the high-temperature high pressure water fretting fatigue normal pressure bringing device, device after the assembly is completed, tired
During labor test, the normal pressure applied between abrasion pressure head and sheet fatigue testing specimen is deformed using extension spring, wears pressure head
It remain stationary, sheet fatigue testing specimen gauge length section repeated deformation, contact area fretting wear repeatedly, it is tired to form high-temperature high pressure water fine motion
Labor.
The invention has the advantages and beneficial effects that:
1, the present invention provides a kind of high-temperature high pressure water fretting fatigue testing device, which can be in high temperature and pressure water environment
In accurately apply sheet fatigue testing specimen and wear pressure head between normal pressure.
2, the support base of apparatus of the present invention is fixed on sample stage, and support base is equipped with positioning groove；Support plate thickness
Degree is identical as positioning groove height, and support plate is equipped with locating flange；Support plate is installed in support base positioning groove, is only existed
Positioning groove depth direction is move freely, and is formed and is fitted close；During fatigue test, fatigue testing specimen gauge length section becomes repeatedly
Shape, the abrasion pressure head being installed in support plate are remain stationary, and fatigue testing specimen and abrasion pressure head contact area generate fretting wear.
3, present clip is ingenious in design, simple to operate, can be with a kind of patent " corruption with high temperature and pressure recirculated water
Erosion fatigue experimental device (publication number CN102346114A) " is used cooperatively, and realizes that the high-temperature high pressure water fine motion of sheet fatigue testing specimen is tired
Labor test.
4, extension spring of the present invention is installed on spring carrier arm, and there are an extension spring, extension spring in support plate two sides
Deformation contacts abrasion pressure head with sheet fatigue testing specimen leptoprosopy, passes through and selects spring specification (such as: material, line footpath, diameter, length)
Normal pressure between accurate control abrasion pressure head and sheet fatigue testing specimen.After the assembly is completed, during fatigue test, pressure head is worn
It remain stationary, sheet fatigue testing specimen gauge length section repeated deformation, contact area and abrasion pressure head generate fretting wear, and it is high to form high temperature
Press water fretting fatigue.
Detailed description of the invention
Fig. 1 is the device of the invention structure chart.In figure: 1 sheet fatigue testing specimen；2 tired fixtures；3 support plates；4 support bottoms
Seat；5 connecting screws；6 extension springs；7 spring carrier arms；8 columns；9 sample stages；10 adapters；11 loading axis；12 autoclave bodies；
13 high pressure kettle covers.
Fig. 2 is support base three-dimensional appearance.In figure: 4 support bases；15 positioning grooves；16 threaded holes.
Fig. 3 is support plate three-dimensional appearance.In figure: 3 support plates；7 spring carrier arms；14 abrasion pressure heads；17 locating flanges；18 twist
Tight bolt；19 annular grooves.
Fig. 4 is the relationship selected between 304 stainless steel stretched camber of spring length and load in embodiment.In figure, horizontal seat
Mark Δ L is represented deformation length (mm), and ordinate Load represents load (N).
Fig. 5 is sheet fatigue testing specimen high-temperature high pressure water fretting fatigue testing rear surface pattern in embodiment.Wherein, (a) is
Sample front elevation (b) is sample side figure.
Specific embodiment
As shown in Figure 1-Figure 3, high-temperature high pressure water fretting fatigue normal pressure bringing device of the present invention, specifically includes that sheet is tired
Labor sample 1, tired fixture 2, support plate 3, support base 4, connecting screw 5, extension spring 6, spring carrier arm 7, column 8, sample
Platform 9, loading axis 11, autoclave body 12, high pressure kettle cover 13, abrasion pressure head 14, positioning groove 15, threaded hole 16, is determined adapter 10
Position flange 17 tightens bolt 18 etc., and specific structure is as follows:
Autoclave body 12 is buckled on high pressure kettle cover 13, and the column 8 in autoclave body 12 is connected through a screw thread mode and fixes
In on high pressure kettle cover 13, the mode that sample stage 9 is connected through a screw thread is fixed on 8 top of column；Sheet fatigue testing specimen 1 is vertically arranged to
Between tired fixture 2 in autoclave body 12,1 upper end of sheet fatigue testing specimen passes through tired fixture 2 and connect with sample stage 9, sheet
1 lower end of fatigue testing specimen passes through tired fixture 2 and connect with adapter 10, the bottom of adapter 10 and the load for passing through high pressure kettle cover 13
Axis 11 connects.
Two support bases 4 are fixed on sample stage 9 by vertically arranged connecting screw 5 respectively, each connecting screw 5
Upper end be fixed on sample stage 9 by nut, the lower end of each connecting screw 5 is connect with support base 4, two support bases
4 are symmetrically disposed on the two sides of sheet fatigue testing specimen 1.The opposite flank of two support bases 4 opens up horizontal positioning groove respectively
15, two positioning grooves 15 are symmetrical arranged, and the top surface of each support base 4 vertically opens up the screw thread communicated with positioning groove 15
Hole 16 (Fig. 2), support base 4 are connect by threaded hole 16 with connecting screw 5.Positioning groove 15 in two support bases 4 divides
The leptoprosopy (that is: wear surface during fatigue test) of other 1 two sides of face sheet fatigue testing specimen, 15 interior points of each positioning groove
Not An Zhuan support plate 3, support plate 3 is that the parallel opposite vertically oriented flange 17 in by-level face and the horizontal plane two sides combines
The thickness of integral I-shaped structure, 3 by-level face of support plate is identical as the height of positioning groove 15, positioning groove 15
Inner surface and 3 surface of support plate all have good finish, make support plate 3 and positioning groove 15 is in be slidably matched.Moreover, every
The locating flange 17 of a 3 two sides of support plate is adjacent to former and later two opposite flanks of support base 4, in two relative positioning flanges 17
The distance between side is of same size with positioning groove 15, move freely support plate 3 can only in 15 depth direction of positioning groove,
And in short transverse and width direction limitation activity, it is formed and is fitted close.
As shown in figure 3, the outer end that abrasion pressure head 14 is installed on 3 by-level face of support plate by tightening bolt 18, each
Wear a leptoprosopy of the outer surface face sheet fatigue testing specimen 1 of pressure head 14；It is right on the locating flange 17 of each 3 two sides of support plate
Claim that rod-shaped spring carrier arm 7 is arranged, spring carrier arm 7 is connected through a screw thread on the locating flange 17 for being installed on support plate 3, two springs
The axis of hook 7 is overlapped, and opens up annular groove 19 on each spring carrier arm 7；Extension spring 6 is two, and each extension spring 6 connects
The spring carrier arm 7 of two 3 same sides of support plate, the both ends of extension spring 6 are separately connected the annular groove 19 of spring carrier arm 7, draw
Stretching the pulling force that the deformation of spring 6 generates contacts the abrasion pressure head 14 being installed in support plate 3 with sheet fatigue testing specimen 1, generation
Normal pressure can be deformed to calculate by extension spring 6 and be obtained；Package unit is placed in autoclave body 12, can be in high temperature and pressure water ring
It is worked normally in border.
In the present invention, tired fixture 2, support plate 3, support base 4, abrasion pressure head 14, connecting screw 5, extension spring 6,
The components such as spring carrier arm 7, column 8, sample stage 9, adapter 10 are all made of the material of high temperature high voltage resistant aqueous corrosion, and (such as: 316 is stainless
Steel etc.) production.
As shown in Figure 1-Figure 3, of the invention to install and use that steps are as follows:
(1) column 8 is connected through a screw thread mode with high pressure kettle cover 13 to tighten, using clamping nut by column 8 and sample
Platform 9 connects；Loading axis 11 passes through high pressure kettle cover 13, and seals loading axis 11 and high pressure kettle cover 13 by sealing ring, by adapter
10 connect with the upper end of loading axis 11.
(2) clamp sheet fatigue testing specimen 1 using tired fixture 2, be connected through a screw thread mode, the upper end of tired fixture 2 with
Sample stage 9 connects, and the lower end of tired fixture 2 is connect by adapter 10 with loading axis 11.
(3) connecting screw 5 is connect with support base 4, connecting screw 5 is fixed on sample stage using thread connecting mode
On 9, and 5 position of connecting screw is adjusted, the positioning groove 15 in support base 4 is made to face the leptoprosopy of sheet fatigue testing specimen 1, and
15 center of positioning groove about maintains an equal level with the gauge length section center of sheet fatigue testing specimen 1.
(4) utilization is tightened bolt 18 and is installed on pressure head 14 is worn in support plate 3, and spring carrier arm 7 is installed on support plate 3
On, support plate 3 is installed in positioning groove 15.
(5) according to fretting fatigue test in sheet fatigue testing specimen 1 and abrasion pressure head 14 between normal pressure size, selection close
Suitable 6 specification of extension spring (such as: material, length, line footpath, diameter), extension spring 6 is installed on spring carrier arm 7.It utilizes
The pulling force that the deformation of extension spring 6 generates contacts abrasion pressure head 14 with the leptoprosopy of sheet fatigue testing specimen 1, and generates centainly just
Pressure；6 specification of extension spring of 3 two sides of support plate is identical, and deformation is identical, and the tensile stress of generation is identical；It is surveyed in target temperature
The coefficient of elasticity for measuring extension spring 6 accurately controls the normal pressure between abrasion pressure head 14 and sheet fatigue testing specimen 1.
(6) high pressure kettle cover 13 and autoclave body 12 are sealed, injects high-temperature high pressure water, carry out high-temperature high pressure water fretting fatigue
Test.
In the following, being further elaborated on by embodiment to the present invention.
Embodiment
690 nickel-base alloys of domestic steam generator heat-transfer pipe, in 285 DEG C, 7.8MPa, dissolved oxygen concentration (DO)≤5ppb
High temperature and pressure recirculated water in fretting fatigue experiment, plastic strain amplitude 0.4%, strain rate 1%s-1, normal direction normal pressure number
Value is 102N.
Experimental material is a kind of effective 690 nickel-base alloy of domestic nuclear power station steam generator heat transfer, sheet fatigue testing specimen shape
Shape size are as follows: gauge length segment length 10mm, wide 6mm, with a thickness of 3mm.According to the installation steps installation sheet fatigue examination of apparatus of the present invention
Sample and normal pressure bringing device.Wherein, the target normal pressure between sheet fatigue testing specimen and abrasion pressure head is 102N, then individually
The pulling force that extension spring deformation generates is 51N.Select 304 stainless steel stretched springs, spring specification is line footpath 2mm, outer diameter 17mm,
By demarcating the coefficient of elasticity of extension spring in 285 DEG C of normal temperature airs, Fig. 4 is seen.Extension spring target pulling force is 51N, according to
The distance between spring carrier arm in specific test, then extension spring length is 57.5mm (being free of drag hook length).
As shown in figure 5, sheet fatigue testing specimen high-temperature high pressure water fretting fatigue testing rear surface pattern, sample table as shown in the figure
There is a fatigue crack vertical with fatigue loading direction in face, and crackle comes across the friction pair opposite grinding surface of sample.Macroscopic view
Upper sample surfaces lose metallic luster, while there is corrosion product on the opposite grinding surface of sample, embody high temperature and pressure water environment to sample
The facilitation of fretting fatigue failure.
Claims (10)
1. a kind of high-temperature high pressure water fretting fatigue normal pressure bringing device, which is characterized in that the device includes: the examination of sheet fatigue
Sample, support plate, support base, connecting screw, extension spring, spring carrier arm, column, sample stage, adapter, adds tired fixture
Axis, autoclave body, high pressure kettle cover, abrasion pressure head, positioning groove, locating flange are carried, specific structure is as follows:
Autoclave body back-off is covered in autoclave, and the intracorporal column of autoclave is fixed on autoclave and covers, and sample stage is fixed on vertical
Column top；Sheet fatigue testing specimen is vertically arranged between the intracorporal tired fixture of autoclave, and sheet fatigue testing specimen upper end passes through tired
Labor fixture is connect with sample stage, and sheet fatigue testing specimen lower end passes through tired fixture and connect with adapter, the bottom of adapter with wear
Cross the load axis connection of high pressure kettle cover；
Two support bases pass through vertically arranged connecting screw respectively and are fixed on sample stage, and two support bases are symmetrical arranged
In the two sides of sheet fatigue testing specimen；The opposite flank of two support bases opens up horizontal positioning groove respectively, and two positioning are recessed
Slot is symmetrical arranged, the leptoprosopy of the positioning groove difference face sheet fatigue testing specimen two sides in two support bases, and each positioning is recessed
Support plate is installed respectively, support plate is the parallel opposite vertically oriented flange group in by-level face and the horizontal plane two sides in slot
Incorporated I-shaped structure；
Abrasion pressure head is installed on the outer end in support plate by-level face, the outer surface face sheet fatigue testing specimen of each abrasion pressure head
A leptoprosopy；Rod-shaped spring carrier arm is symmetrical arranged on the locating flange of each support plate two sides, extension spring is two, each
Extension spring connects the spring carrier arm of two support plate same sides.
2. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that autoclave body
The mode that interior column is connected through a screw thread is fixed on autoclave and covers, and the mode that sample stage is connected through a screw thread is fixed on column top
Portion.
3. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that each connection
The upper end of screw rod is fixed on sample stage by nut, and the lower end of each connecting screw is connect with support base, each support bottom
The top surface of seat vertically opens up the threaded hole communicated with positioning groove, and support base is connect by threaded hole with connecting screw.
4. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that in support plate
Between horizontal plane thickness it is identical as the height of positioning groove, support plate and positioning groove are in being slidably matched；Each support plate two sides
Locating flange be adjacent to former and later two opposite flanks of support base, the distance between two relative positioning flange inners and positioning
Groove it is of same size, move freely support plate in positioning groove depth direction, support plate is in short transverse and width direction
Limitation activity is formed and is fitted close.
5. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that abrasion pressure head
The outer end for being installed on support plate by-level face by tightening bolt.
6. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that spring carrier arm
It is connected through a screw thread on the locating flange for being installed on support plate, the axis of symmetrically arranged two spring carrier arms is overlapped, each bullet
Annular groove is opened up on spring hook, the both ends of each extension spring are separately connected the annular groove of spring carrier arm, and extension spring deformation produces
Raw pulling force makes to be installed on the abrasion pressure head in support plate and contacts with sheet fatigue testing specimen.
7. high-temperature high pressure water fretting fatigue normal pressure bringing device described in accordance with the claim 1, which is characterized in that positioning groove
Center face sheet fatigue testing specimen gauge length section center.
8. the application method of high-temperature high pressure water fretting fatigue normal pressure bringing device described in a kind of one of claim 1 to 7,
It is characterized in that, includes the following steps:
(1) column is connected through a screw thread mode with high pressure kettle cover to tighten, is connect column with sample stage using clamping nut；Add
It carries axis and passes through high pressure kettle cover, and loading axis and high pressure kettle cover are sealed by sealing ring, the upper end of adapter and loading axis is connected；
(2) sheet fatigue testing specimen is clamped using tired fixture, is connected through a screw thread mode, the upper end of tired fixture and sample stage connect
It connects, the lower end of tired fixture passes through adapter and load axis connection；
(3) connecting screw is connect with support base, connecting screw is fixed on sample stage using thread connecting mode, and adjusts
Connecting screw position is saved, the positioning groove in support base is made to face the leptoprosopy of sheet fatigue testing specimen, and positioning groove center
Position and the gauge length section center of sheet fatigue testing specimen maintain an equal level；
(4) utilization is tightened bolt and is installed on pressure head is worn in support plate, and spring carrier arm is installed in support plate, by support plate
It is installed in positioning groove；
(5) according to fretting fatigue test in normal pressure size between sheet fatigue testing specimen and abrasion pressure head, select suitable draw
Spring specification is stretched, extension spring is installed on spring carrier arm；
(6) high pressure kettle cover and autoclave body are sealed, injects high-temperature high pressure water, carry out high-temperature high pressure water fretting fatigue testing.
9. the application method of high-temperature high pressure water fretting fatigue normal pressure bringing device, feature exist according to claim 8
In the pulling force generated using extension spring deformation contacts abrasion pressure head with the leptoprosopy of sheet fatigue testing specimen, and generates positive pressure
Power；The extension spring specification of support plate two sides is identical, and deformation is identical, and the tensile stress of generation is identical；Bullet is measured in target temperature
The coefficient of elasticity of spring, the normal pressure between accurate control abrasion pressure head and sheet fatigue testing specimen.
10. the application method of high-temperature high pressure water fretting fatigue normal pressure bringing device, feature exist according to claim 8
In device after the assembly is completed, during fatigue test, is deformed using extension spring and applies abrasion pressure head and sheet fatigue testing specimen
Between normal pressure, abrasion pressure head remain stationary, and sheet fatigue testing specimen gauge length section repeated deformation, contact area rubs mill repeatedly
Damage forms high-temperature high pressure water fretting fatigue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532846.2A CN110208125B (en) | 2019-06-19 | 2019-06-19 | High-temperature high-pressure water micro-fatigue positive pressure applying device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532846.2A CN110208125B (en) | 2019-06-19 | 2019-06-19 | High-temperature high-pressure water micro-fatigue positive pressure applying device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN110208125A true CN110208125A (en) | 2019-09-06 |
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| CN111678799A (en) * | 2020-06-19 | 2020-09-18 | 中国核动力研究设计院 | Displacement loading system applied to strain calibration device |
| CN113933190A (en) * | 2021-10-12 | 2022-01-14 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | High-voltage circuit breaker spring fatigue fault degree diagnosis device and method |
| CN114018734A (en) * | 2022-01-07 | 2022-02-08 | 常州旺阁电器科技有限公司 | Leather fatigue tester |
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| CN114018734B (en) * | 2022-01-07 | 2022-03-08 | 常州旺阁电器科技有限公司 | Leather fatigue tester |
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