CN111693243B - High-temperature high-pressure multiphase flow impact fretting damage testing system and implementation method thereof - Google Patents
High-temperature high-pressure multiphase flow impact fretting damage testing system and implementation method thereof Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000001133 acceleration Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 34
- 239000000498 cooling water Substances 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000010963 304 stainless steel Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 6
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- 230000004044 response Effects 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
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- G21C17/001—Mechanical simulators
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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
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- 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
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Abstract
The invention discloses a high-temperature high-pressure multiphase flow impact fretting damage testing system and an implementation method thereof, wherein the system comprises an impact fretting test device and a water circulation treatment system communicated with the impact fretting test device; the impact micro-motion test device comprises a high-temperature high-pressure container; the high-temperature high-pressure container comprises an upper cavity and a lower cavity which can be opened and closed; the lower cavity body is positioned on the mounting platform, and the upper cavity body is positioned on the lifting platform; a first test element and a second test element are fixedly arranged in the high-temperature high-pressure container; an optical fiber acceleration sensor is arranged on the first test element; the second test element is positioned in the middle of the high-temperature high-pressure container, is arranged in the optical fiber force sensor, and is sequentially connected with the flexible connecting piece, the excitation piston rod, the connecting disc and the two high-frequency electromagnetic excitation devices which are distributed orthogonally; the top of the high-temperature high-pressure container is provided with a heating element, and the side surface of the high-temperature high-pressure container is communicated with a water quality circulating treatment system through a circulating water inlet and a circulating water outlet which are arranged.
Description
Technical Field
The invention belongs to the technical field of fretting damage testing, and particularly relates to a high-temperature high-pressure multiphase flow impact fretting damage testing system and an implementation method thereof.
Background
In a pressurized water reactor nuclear power system, due to the ubiquitous phenomenon of flow-induced vibration, impact fretting wear often occurs among elements with close fit and clearance fit, for example, between a steam generator heat transfer pipe and a quincunx hole support plate, between a fuel rod cladding pipe and a grid spring and between a control rod cladding pipe and a spring grid, damage and thinning of components caused by fretting wear often lead to early shutdown and maintenance of a nuclear power reactor, and serious or even leakage accidents occur, so that the operation safety of the nuclear power station is affected.
At present, a great deal of research work on fretting damage of nuclear power elements at home and abroad is carried out, but a great deal of research work is concentrated on the research aspect of material damage mechanisms, the problem that in a real service environment, a structure basically identical to the engineering service condition is adopted, and the fretting damage research under the simulation of the real engineering operation condition is still blank, because the nuclear power service environment is relatively extreme, the test cost is relatively high, and the test simulation based on the engineering service condition is the key for establishing a damage prediction model and testing the reliability of materials and components.
Disclosure of Invention
The present invention is directed to provide a system for testing micro-motion damage caused by impact of high-temperature and high-pressure multiphase flow and a method for implementing the same, so as to solve or improve the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that:
a high-temperature high-pressure multiphase flow impact fretting damage test system and an implementation method thereof comprise the following steps: the device comprises an impact micro-motion test device and a water quality circulating treatment system communicated with the impact micro-motion test device;
the impact micro-motion test device comprises a high-temperature high-pressure container; the high-temperature high-pressure container comprises an upper cavity and a lower cavity which can be opened and closed; the lower cavity body is positioned on the mounting platform, and the upper cavity body is positioned on the lifting platform; a first test element and a second test element are fixedly arranged in the high-temperature high-pressure container; an optical fiber acceleration sensor is arranged on the first test element; the second test element is positioned in the middle of the high-temperature high-pressure container, is arranged in the optical fiber force sensor, and is sequentially connected with the flexible connecting piece, the excitation piston rod, the connecting disc and the two high-frequency electromagnetic excitation devices which are distributed orthogonally; the top of the high-temperature high-pressure container is provided with a heating element, and the side surface of the high-temperature high-pressure container is communicated with a water quality circulating treatment system through a circulating water inlet and a circulating water outlet which are arranged.
Preferably, the mounting platform is mounted on a plurality of uprights connected to the ground by means of damping and shock-absorbing elements.
Preferably, the damping vibration-absorbing element is made of rubber which can resist shear vibration.
The shearing vibration can be effectively slowed down, and the influence on the test precision is reduced.
Preferably, the lifting platform vertically moves along the guide pillar through the graphite sliding sleeve, and the guide pillar is fixed on the mounting platform.
The lifting platform can move up and down along the guide pillar through the graphite sliding sleeve, so that the upper cavity and the lower cavity of the high-temperature high-pressure container are closed and separated, the up-and-down movement of the lifting platform is realized through the pneumatic lifting device, and certain buffering can be allowed in the up-and-down movement process of the platform.
Preferably, the two ends of the first test element are arranged inside the high-temperature high-pressure container by adopting a clamping device.
And fixing the first test element in the high-temperature high-pressure container through the clamping device.
Preferably, a cooling water jacket is arranged between the sealing point of the excitation piston rod and the high-temperature high-pressure container, a sealing ring mounting sleeve is arranged at the sealing point, and a guide sleeve is arranged at the front end of the cooling water jacket.
The dynamic sealing is realized between the excitation piston rod and the high-temperature high-pressure container by adopting a forced cooling sealing mode, circulating cooling water is introduced through a cooling water jacket to forcibly cool the excitation piston rod, the sealing temperature is reduced to be lower than the working temperature suitable for the sealing ring, and then the dynamic sealing is performed between the excitation piston rod and the high-temperature high-pressure container by adopting a two-stage sealing mode.
Preferably, the middle part of the excitation piston rod is provided with a hollow hole for communicating the internal and external pressure cavities of the high-temperature high-pressure container.
The pressure balance at the two ends of the exciting piston rod is established by leading out the high pressure in the container to the pressure cavity outside the container.
Preferably, the material of the high-temperature high-pressure container is 304 stainless steel.
The occurrence of the water chemical reaction during the operation process can be prevented.
Preferably, the material of the excitation piston rod is 304 stainless steel, and the surface is coated after being plated with chrome.
And after the surface of the excitation piston rod is plated with chrome, coating treatment is carried out, so that the sealing friction coefficient is reduced.
An implementation method of a high-temperature high-pressure multiphase flow impact fretting damage testing system comprises the following steps:
s1, opening the upper cavity and the lower cavity of the high-temperature high-pressure container by the lifting platform, installing a first test element and a second test element in the upper cavity and the lower cavity, descending the lifting platform, and closing the high-temperature high-pressure container;
s2, operating the water quality circulation treatment system, introducing high-pressure water into the high-temperature high-pressure container, and heating the test environment to a preset state through a heating element;
s3, operating two orthogonal high-frequency electromagnetic excitation devices to drive the second test element to move and enable the second test element and the first test element to generate impact abrasion;
and S4, measuring dynamic response parameters of the first test element and the second test element in the process of impact wear through the optical fiber acceleration sensor and the optical fiber force sensor.
The high-temperature high-pressure multiphase flow impact fretting damage testing system and the implementation method thereof provided by the invention have the following beneficial effects:
the invention can carry out a test system of 1:1 engineering verification on a real service structure, realize random motion tracks under different phase angle couplings, and simulate impact fretting wear under flow-induced vibration; and the service environment under the nuclear power two-loop operation condition is realized, and the reliability of components which are easy to generate impact fretting damage in a nuclear power system is checked.
Drawings
FIG. 1 is an isometric view of a high temperature high pressure multiphase flow impact fretting damage test system.
FIG. 2 is a sectional structure view of a high-temperature high-pressure multiphase flow impact fretting damage testing system.
FIG. 3 is a schematic diagram of an excitation loading cooling sealing structure of a high-temperature high-pressure multiphase flow impact fretting damage testing system.
FIG. 4 is a working schematic diagram of a high-temperature high-pressure multiphase flow impact fretting damage testing system and an implementation method thereof.
Wherein, 1, upright post; 2. a damping vibration-damping element; 3. mounting a platform; 4. a high-frequency electromagnetic excitation device; 5. Lifting the platform; 6. a graphite sliding sleeve; 7. a pneumatic lifting device; 8. a lifting link; 9. a guide post; 10. a high temperature high pressure vessel; 11. a pressure chamber; 12. a movable sealing ring; 13. a loading link; 14, a sealing ring mounting sleeve; 15. a cooling water jacket; 16. a guide sleeve; 17. a first test element; 18. a clamping device; 19. a heating element; 20. an optical fiber acceleration sensor; 21. a circulating water inlet; 22. a circulating water outlet; 23. a flexible connector; 24. a second test element; 25. an optical fiber force sensor; 26. exciting a piston rod; 27. a connecting disc; 28. a retainer ring; 29. and a static sealing ring.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to an embodiment of the application, referring to fig. 1-3, the high-temperature high-pressure multiphase flow impact fretting damage testing system, the impact fretting test device and the water circulation treatment system communicated with the impact fretting test device can be used for performing impact fretting wear tests and parameter measurement of nuclear power parts and grinding pairs under different vibration modes, such as a heat transfer pipe and a support disc, a fuel rod cladding pipe and a grid spring, and a control rod cladding pipe and a grid spring in a real service state.
The impact micro-motion test device comprises a high-temperature high-pressure container 10, wherein the high-temperature high-pressure container 10 comprises an upper cavity and a lower cavity which can be opened and closed, the lower cavity is located on the mounting platform 3, and the upper cavity is located on the lifting platform 5.
The mounting platform 3 is mounted on the stand column 1 connected with the ground through the damping vibration attenuation element 2, and the damping vibration attenuation element 2 is made of rubber capable of resisting shear vibration, so that the shear vibration can be effectively reduced, and the influence on the test precision is reduced.
The lifting platform 5 vertically moves along the guide post 9 through the graphite sliding sleeve 6, and the guide post 9 is fixed on the mounting platform 3. The graphite sliding sleeve 6 can move up and down along the guide post 9 to realize the closing and separation of the upper cavity and the lower cavity of the high-temperature high-pressure container 10, and the up-and-down movement of the lifting platform 5 is realized through the pneumatic lifting device 7, so that the platform can be allowed to have certain buffering in the up-and-down movement process.
The high-temperature high-pressure container 10 is made of 304 stainless steel, so that the occurrence of a water chemical reaction in the operation process can be prevented.
A first test element 17 and a second test element 24 are fixedly installed inside the high-temperature high-pressure container 10, the first test element 17 is a pipe-mounted element, such as a heat transfer pipe or a cladding pipe, the first test element 17 is installed inside the high-temperature high-pressure container 10 through a clamping device 18 in a mode of fixedly clamping two ends, and an optical fiber acceleration sensor 20 is installed on the first test element 17.
The second test element 24 is a support plate or a lattice spring, is located in the middle of the high-temperature high-pressure container 10, is installed in the optical fiber force sensor 25, and is sequentially connected with the flexible connecting piece 23, the excitation piston rod 26, the connecting disc 27 and the two orthogonally distributed high-frequency electromagnetic excitation devices 4.
The top of the high-temperature high-pressure container 10 is provided with a heating element 19, and the side surface of the high-temperature high-pressure container 10 is communicated with a water quality circulation treatment system through a circulation water inlet 21 and a circulation water outlet 22 which are arranged. The interfaces of the optical fiber force sensor 25, the circulating water inlet 21 and the circulating water outlet 22 are all intensively arranged on a flange which is arranged in the middle of the high-temperature high-pressure container 10.
The circulating water inlet 21 and the circulating water outlet 22 can realize the test state in the high-temperature and high-pressure multiphase flow environment.
Referring to fig. 4, the water quality circulation processing system is used for introducing high-pressure water into the high-temperature high-pressure vessel 10 and performing water quality circulation.
The two high-frequency electromagnetic excitation devices 4 are orthogonally distributed and fixed on the mounting platform 3, and the high-frequency electromagnetic excitation devices 4 apply an impact load to the second test element 24 mounted inside the pressure vessel through the excitation piston rod 26. The piston rod is made of 304 stainless steel, and the surface of the piston rod is plated with chrome and then is subjected to coating treatment, so that the sealing friction coefficient is reduced.
Two sets of high-frequency electromagnetic excitation devices 4 which are arranged in an orthogonal mode are adopted to simultaneously carry out excitation loading on a test piece, random motion tracks caused by flow-induced vibration in engineering are realized under the coupling of different output phase angles, so that the test element is subjected to impact fretting wear, and dynamic response parameters in the test process are measured through an optical fiber sensor.
The flexible connecting element is a sheet spring which has high rigidity parallel to the excitation direction and good flexibility perpendicular to the excitation direction, so that the interference caused by simultaneous orthogonal loading is solved.
A forced cooling dynamic sealing design mode is adopted between the excitation piston rod 26 and the high-temperature high-pressure container 10, a cooling water jacket 15 with a certain length is designed between a sealing point and the high-temperature high-pressure container 10, circulating cooling water is introduced to forcibly cool the excitation piston rod 26, a sealing ring mounting sleeve 14 of the sealing point is designed to be in two-stage dynamic sealing, a first-stage sealing ring is used for realizing sealing or pressure reduction sealing, a second-stage sealing ring is used for realizing final sealing, a guide sleeve 16 is designed at the front end of the cooling water jacket 15, and the centering performance of the excitation piston rod 26 is guaranteed.
Dynamic sealing is realized between the excitation piston rod 26 and the high-temperature high-pressure container 10 in a forced cooling sealing mode, circulating cooling water is introduced through the cooling water jacket 15, the excitation piston rod 26 is cooled forcibly, the sealing temperature is reduced to be lower than the working temperature suitable for the sealing ring, and then the excitation piston rod 26 and the high-temperature high-pressure container 10 are sealed movably in a two-stage sealing mode.
Because the load applied by the high-pressure environment under the external normal-pressure environment needs to overcome the internal and external pressure difference, the high pressure in the container is led into a pressure cavity 11 added outside by designing a hollow hole in the middle of the excitation piston rod 26, so that the self-balance without the pressure difference at two ends of the piston rod is realized, namely, the pressure balance at two ends of the excitation piston rod 26 is established by leading the high pressure in the container into the pressure cavity 11 outside the container.
Silica gel sealing rings are adopted between the excitation piston rod 26 and the high-temperature high-pressure container 10 and between the excitation piston rod 26 and the pressure cavity 11, so that the high-frequency vibration testing device has good elasticity and is suitable for high-frequency actuation displacement required by a micro-motion test; after the pressure inside the pressure vessel is controlled by the water quality circulation processing device, the water medium is heated by the electric heating element 19 installed inside the high-temperature high-pressure vessel 10, and the high-temperature high-pressure multiphase flow environment is tested.
According to an embodiment of the present application, referring to fig. 4, an implementation method of a high-temperature high-pressure multiphase flow impact micro-motion damage testing system includes:
s1, opening the upper cavity and the lower cavity of the high-temperature high-pressure container 10 by the lifting platform 5, installing the first test element 17 and the second test element 24 in the upper cavity and the lower cavity, descending the lifting platform 5, and closing the high-temperature high-pressure container 10;
that is, the lifting platform 5 is lifted through the pneumatic lifting device 7, the upper cavity of the high-temperature high-pressure container 10 is separated from the lower cavity of the container along with the lifting of the lifting platform 5, in this state, the first test element 17 and the second test element 24 are installed, adjusted and fixed inside the high-temperature high-pressure container 10, after the test elements are installed, the lifting platform 5 is lowered, the high-temperature high-pressure container 10 is closed, and parameter correction and zero setting are performed on the test device.
S2, operating the water quality circulation treatment system, introducing high-pressure water into the high-temperature high-pressure container 10, and heating the test environment to a preset state through the heating element 19;
high-pressure water is introduced into the high-temperature high-pressure container 10 through the water quality circulation treatment device, water quality circulation is carried out, after a stable internal pressure state is established, water is heated through the electric heating element 19, and the required test water vapor environmental temperature and the internal pressure are established.
S3, operating the two orthogonal high-frequency electromagnetic excitation devices 4 to drive the second test element 24 to move and enable the second test element 24 and the first test element 17 to generate impact abrasion; namely, the electromagnetic excitation device and the piston rod drive the test element to generate impact fretting wear.
And S4, measuring the dynamic response parameters of the first test element 17 and the second test element 24 in the process of impact abrasion through the optical fiber acceleration sensor 20 and the optical fiber force sensor 25.
The method comprises the steps that a pair of grinding elements which are completely the same as the engineering use conditions are arranged inside a high-temperature high-pressure container 10, an external high-frequency electromagnetic excitation device 4 is used for driving one of test elements to carry out high-frequency excitation, impact fretting wear occurs between contact surfaces of the grinding elements, and impact fretting damage kinetic response parameters are measured in real time; the test system can carry out 1:1 engineering verification on a real service structure, realize random motion tracks under different phase angle couplings, and simulate impact fretting wear under flow-induced vibration; and the service environment under the nuclear power two-loop operation condition is realized, and the reliability of components which are easy to generate impact fretting damage in a nuclear power system is checked.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. A high-temperature high-pressure multiphase flow impact fretting damage test system is characterized in that: comprises an impact micro-motion test device and a water quality circulating treatment system communicated with the impact micro-motion test device;
the impact micro-motion test device comprises a high-temperature high-pressure container; the high-temperature high-pressure container comprises an upper cavity and a lower cavity which can be opened and closed; the lower cavity body is positioned on the mounting platform, and the upper cavity body is positioned on the lifting platform; a first test element and a second test element are fixedly arranged in the high-temperature high-pressure container; an optical fiber acceleration sensor is arranged on the first test element; the second test element is positioned in the middle of the high-temperature high-pressure container, is arranged in the optical fiber force sensor, and is sequentially connected with the flexible connecting piece, the excitation piston rod, the connecting disc and the two high-frequency electromagnetic excitation devices which are distributed orthogonally; the top of the high-temperature high-pressure container is provided with a heating element, and the side surface of the high-temperature high-pressure container is communicated with a water quality circulating treatment system through a circulating water inlet and a circulating water outlet which are formed;
a cooling water jacket is arranged between the sealing point of the excitation piston rod and the high-temperature high-pressure container, a sealing ring mounting sleeve is arranged at the sealing point, and a guide sleeve is arranged at the front end of the cooling water jacket;
the middle part of the excitation piston rod is provided with a hollow hole for communicating the inner part of the high-temperature high-pressure container with the outer pressure cavity; a hollow hole is designed in the middle of the excitation piston rod, high pressure in the container is led into a pressure cavity which is added outside, self balance of no pressure difference at two ends of the piston rod is achieved, namely, the high pressure in the container is led into the pressure cavity outside the container, and pressure balance at two ends of the excitation piston rod is established.
2. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 1, wherein: the mounting platform is mounted on a plurality of upright posts connected with the ground through damping vibration attenuation elements.
3. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 2, wherein: the damping vibration attenuation element is made of rubber capable of resisting shearing vibration.
4. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 1, wherein: the lifting platform vertically moves along the guide pillar through the graphite sliding sleeve, and the guide pillar is fixed on the mounting platform.
5. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 1, wherein: and two ends of the first test element are arranged in the high-temperature high-pressure container by adopting a clamping device.
6. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 1, wherein: the material of the high-temperature high-pressure container is 304 stainless steel.
7. The high-temperature high-pressure multiphase flow impact fretting damage testing system of claim 1, wherein: the excitation piston rod is made of 304 stainless steel, and the surface of the excitation piston rod is coated after being plated with chrome.
8. The implementation method of the high-temperature high-pressure multiphase flow impact fretting damage testing system as claimed in any one of claims 1-7, comprises the steps of:
s1, opening the upper cavity and the lower cavity of the high-temperature high-pressure container by the lifting platform, installing a first test element and a second test element in the upper cavity and the lower cavity, descending the lifting platform, and closing the high-temperature high-pressure container;
s2, operating the water quality circulation treatment system, introducing high-pressure water into the high-temperature high-pressure container, and heating the test environment to a preset state through a heating element;
s3, operating two orthogonal high-frequency electromagnetic excitation devices to drive the second test element to move and enable the second test element and the first test element to generate impact abrasion;
and S4, measuring dynamic response parameters of the first test element and the second test element in the process of impact wear through the optical fiber acceleration sensor and the optical fiber force sensor.
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| CN113702228A (en) * | 2021-09-01 | 2021-11-26 | 嵊州市浙江工业大学创新研究院 | Fretting wear experimental device for U-shaped heat transfer pipe under high-temperature working condition |
| CN114985022B (en) * | 2022-04-28 | 2023-07-21 | 机械工业仪器仪表综合技术经济研究所 | Environment comprehensive test system with multiple environment parameters |
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| CN107703014B (en) * | 2017-11-03 | 2024-04-09 | 岭东核电有限公司 | Impact abrasion tester for high-temperature and high-pressure environment |
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