CN113063691A - Vertical direction-changeable random excitation heat transfer pipe fretting wear test device - Google Patents
Vertical direction-changeable random excitation heat transfer pipe fretting wear test device Download PDFInfo
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- CN113063691A CN113063691A CN202110432769.0A CN202110432769A CN113063691A CN 113063691 A CN113063691 A CN 113063691A CN 202110432769 A CN202110432769 A CN 202110432769A CN 113063691 A CN113063691 A CN 113063691A
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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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- 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
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Abstract
The invention discloses a vertical direction-changeable random excitation lower heat transfer pipe fretting wear test device, which comprises a working bench, a bottom plate, random excitation equipment and a heat transfer pipe, wherein the working bench is fixedly arranged on the bottom plate, the random excitation equipment is arranged on the bottom plate in a matching way, and the random excitation equipment can slide by taking the working bench as the circle center, so that the angle adjustment is carried out; the heat transfer pipe is characterized in that a groove guide rail is arranged on the main plane of the workbench frame, bearing seat assemblies are respectively arranged at the upper end and the lower end of the groove guide rail, which are close to the workbench frame, two ends of the heat transfer pipe are respectively and fixedly arranged on the bearing seat assemblies, and a vibration rod assembly is arranged on the heat transfer pipe and is connected with random vibration excitation equipment through the vibration rod assembly. The invention has the beneficial effects that: the testing device is used for researching the influence factors of the fretting wear of the heat transfer pipe so as to analyze the fretting wear behavior of the heat transfer pipe, thereby prolonging the service life of the steam generator.
Description
Technical Field
The invention relates to the field of fretting wear tests, in particular to a vertical direction-changeable random excitation heat transfer pipe fretting wear test device.
Background
With the development of industrial process, the demand and consumption of electricity are increasing. Compared with traditional fossil energy sources such as petroleum, coal, natural gas and the like, nuclear power has the advantage of higher efficiency. The steam generator, as a core equipment of the nuclear power plant, is mainly responsible for the heat exchange between the primary and secondary circuits. The heat transfer pipe is the interface of the primary loop and the secondary loop medium, and once the heat transfer pipe is broken, the pressure and the water level in the loop are changed, so that the safe operation of the nuclear power plant is greatly threatened.
Changes in the length of service of the steam generator can change the main failure modes of the heat transfer tube, including stress corrosion cracking, intergranular corrosion, corrosion cracking, fretting wear, and the like. Fretting wear, one of the primary failure modes of heat transfer tubes, occurs primarily at restricted locations between the heat transfer tubes and the anti-vibration bars. The high flow rate fluid impingement combined with the small gap between the heat transfer tubes and the anti-vibration bars is an important cause of fretting wear in the heat transfer tubes.
When the pipe wall of the heat transfer pipe is thinned to a certain proportion, the pipe has to be blocked, the heat exchange efficiency is greatly reduced along with the increase of the number of the blocked pipes in the steam generator, and the service life of the steam generator is greatly shortened. In order to prolong the service life of the heat transfer pipe, ensure the service life of the steam generator, and consider that the actual working condition is complex, and the impact of fluid in a steam generator loop is unordered and has no fixed direction, a vertical variable-angle heat transfer pipe fretting wear test device is necessary to be designed, and the influence factors of fretting wear of the heat transfer pipe are researched so as to analyze the fretting wear behavior of the heat transfer pipe and increase the service life of the steam generator.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a vertical direction-changeable random excitation lower heat transfer pipe fretting wear test device with reasonable structural design.
The technical scheme of the invention is as follows:
the vertical type direction-variable random excitation lower heat transfer pipe fretting wear test device comprises a working bench, a bottom plate, random excitation equipment and a heat transfer pipe, wherein the working bench is fixedly arranged on the bottom plate, the random excitation equipment is arranged on the bottom plate in a matched mode, and the random excitation equipment can slide by taking the working bench as a circle center so as to adjust the angle; the heat transfer pipe is characterized in that a groove guide rail is arranged on the main plane of the workbench frame, bearing seat assemblies are respectively arranged at the upper end and the lower end of the groove guide rail, which are close to the workbench frame, two ends of the heat transfer pipe are respectively and fixedly arranged on the bearing seat assemblies, and a vibration rod assembly is arranged on the heat transfer pipe and is connected with random vibration excitation equipment through the vibration rod assembly.
Furthermore, a sensor assembly is arranged between the two bearing seat assemblies on the main plane of the working table frame and used for monitoring the displacement amplitude of the contact position in the vibration process of the heat transfer pipe in real time.
Further, clamping piece, sensor mounting bracket and displacement sensor behind clamping piece, the anti vibration strip before the anti vibration strip, clamping piece setting is in work bench height such as before the anti vibration strip behind clamping piece and the anti vibration strip, displacement sensor passes through the sensor mounting bracket to be fixed before the anti vibration strip on clamping piece and the anti vibration strip back clamping piece.
Furthermore, four groove guide rails are arranged on the main plane of the working table frame in parallel, a group of small sliding blocks with threaded holes is arranged in each groove guide rail, and a group of square holes used for placing the small sliding blocks in advance is arranged at the edge of each groove guide rail.
Furthermore, the bearing seat assembly and the sensor assembly are respectively and fixedly arranged on the small sliding block, and the vertical position of the bearing seat assembly and the sensor assembly can be adjusted on the main plane of the working table frame through the small sliding block.
Furthermore, the bearing seat assembly comprises a bearing seat and a bearing seat inner sleeve, two bearings are arranged in the bearing seat, the bearing inner sleeves are arranged in the bearings in an interference fit mode, and the heat transfer pipe is fixed by screwing screws on the bearing seat inner sleeve.
Furthermore, the vibration rod assembly comprises a vibration rod, a load sensor and a clamp, one end of the vibration rod is fixed on random vibration excitation equipment, the other end of the vibration rod is connected with the load sensor, and the load sensor is welded on the clamp and fixed on the heat transfer pipe through the clamp.
Furthermore, four lifting lugs are arranged above the working table frame so as to facilitate the transportation, loading and unloading of the working table frame, and lug plates are respectively arranged on planes on two sides of the working table frame.
Furthermore, two arc slide rails are arranged on the bottom plate, and angle identification lines are carved on the outer sides of the arc slide rails.
Furthermore, four brakeable rollers are arranged at the bottom end of the random excitation equipment, and the front and the rear of the four brakeable rollers are respectively arranged in the two arc slide rails in a matching manner.
The invention has the beneficial effects that:
1) through set up the bearing frame subassembly on the work bench, can effectually fix the heat transfer pipe, through set up the vibrating rod subassembly on the heat transfer pipe to link to each other with excitation equipment at random through the vibrating rod subassembly, realize the simulation to heat transfer pipe operational environment, through set up sensor assembly on the heat transfer pipe, the displacement amplitude at the contact position among the real-time supervision heat transfer pipe vibration process, and feed back to the controller, control excitation equipment reasonable output at random.
2) The testing device is used for researching the influence factors of the fretting wear of the heat transfer pipe so as to analyze the fretting wear behavior of the heat transfer pipe, thereby prolonging the service life of the steam generator.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic diagram of a sensor assembly of the present invention;
FIG. 5 is a partial structural view of the work bench of the present invention;
FIG. 6 is an enlarged view of the structure at A of the present invention;
FIG. 7 is an enlarged view of the structure of the present invention at B;
FIG. 8 is an enlarged view of the structure at C of the present invention;
in the figure: 1-a workbench stand, 101-a groove guide rail, 102-a square hole, 103-a small sliding block, 104-a lifting lug, 105-an ear plate, 2-a bottom plate, 201-a circular arc slide rail, 3-a bearing seat assembly, 301-a bearing seat, 302-a screw, 303-a bearing seat inner sleeve, 4-a sensor assembly, 401-an anti-vibration strip front clamping piece, 402-an anti-vibration strip rear clamping piece, 403-a displacement sensor, 404-a sensor mounting frame, 5-a vibration rod assembly, 501-a vibration rod, 502-a load sensor, 503-a clamp, 6-a random excitation device and 7-a heat transfer pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the vertical variable-angle random excitation heat transfer tube fretting wear test device comprises a work bench 1, a groove guide rail 101, a square hole 102, a small slide block 103, a lifting lug 104, an ear plate 105, a bottom plate 2, an arc slide rail 201, a bearing seat assembly 3, a bearing seat 301, a screw 302, a bearing seat inner sleeve 303, a sensor assembly 4, an anti-vibration strip front clamping piece 401, an anti-vibration strip rear clamping piece 402, a displacement sensor 403, a sensor mounting rack 404, a vibration rod assembly 5, a vibration rod 501, a load sensor 502, a clamp 503, a random excitation device 6 and a heat transfer tube 7.
Example (b):
two arc slide rails 201 are arranged on the bottom plate 2, angle identification lines are carved on the outer sides of the arc slide rails 201 and respectively correspond to 0 degree, 30 degrees, 45 degrees and 60 degrees, and a plurality of threaded holes are formed in the bottom plate 2 and used for fixing the working table frame 1.
The bottom end of the random excitation equipment 6 is provided with four brakable rollers which can move along the arc slide rail 201 of the bottom plate, a midpoint scale mark is carved at the midpoint of the plane of the bottom of the random excitation equipment 6, the midpoint scale mark of the excitation equipment is aligned with the angle mark line on the bottom plate according to a preset excitation angle, the brake pedal on the brakable roller is pressed down, the random excitation equipment 6 is fixed on the bottom plate 2, and the excitation equipment is prevented from accidentally vibrating in the test process.
The workbench frame 1 is fixed on the reaction wall through the ear plates 105 in a bolt connection mode and fixed on the bottom plate 2 in a bolt connection mode, the workbench frame 1 is designed in a hollow mode, on one hand, the weight of the workbench frame is reduced, and on the other hand, the test operation is convenient. Four linear groove guide rails 101 are arranged on the main plane of the working table frame 1, a plurality of small sliding blocks 103 with threaded holes are arranged in the guide rails and used for fixing a front anti-vibration strip clamping piece 401, a rear anti-vibration strip clamping piece 402 and a bearing seat 301, and a plurality of square holes 102 are formed in the edges of the groove guide rails 101 and used for placing the small sliding blocks 103 in advance. The anti-vibration strip front clamping plate 401, the anti-vibration strip rear clamping plate 402 and the bearing seat 301 can slide up and down along the groove guide rail 101, and when the anti-vibration strip front clamping plate slides to a test set position, the anti-vibration strip rear clamping plate is fixed on the working table frame 1 through screws. Four threaded holes are formed in the upper portion of the workbench frame 1 and used for installing screws of the lifting lugs 104, so that the workbench frame 1 can be conveniently transported, assembled and disassembled.
The heat transfer pipe 7 is fixed on the bearing seat 301, two bearings are arranged in the bearing seat 301, the bearing inner sleeve 303 and the bearings are in interference fit, and the heat transfer pipe 7 is fixed by tightening a screw 302 on the bearing seat inner sleeve 303 to apply pretightening force.
The displacement sensors 403 are fixed in the sensor support 404, three displacement sensors 403 are arranged in total as shown in fig. 4, and the sensor support 404 is mounted on the upper plane of the anti-vibration strip front clamping piece 401 and the anti-vibration strip rear clamping piece 402 and used for monitoring the displacement amplitude of the contact position of the heat transfer pipe 7 in the vibration process in real time, feeding the displacement amplitude back to the controller and controlling the random excitation device 6 to output reasonably.
The vibration rod assembly 5 comprises a vibration rod 501, a clamp 503 and a load sensor 502, wherein the vibration rod is made of 304 stainless steel materials, two ends of the vibration rod are provided with threads, one end of the vibration rod 501 is fixed on a working plane of the random excitation device 6, and the other end of the vibration rod is connected with the load sensor 502. The load sensor 502 is welded to the clamp 503. The clamp 503 is fitted over the outside of the heat transfer pipe 7, and the clamp 503 is fixed to the heat transfer pipe 7 by tightening the bolts on the clamp 503.
The working process is as follows:
firstly, a bearing seat 301 is fixed on the working table frame 1, a screw 302 on an inner sleeve 303 of the bearing seat is loosened, then a heat transfer pipe 7 is arranged in the bearing seat 301 from bottom to top along the inner sleeve 303 of the bearing seat, and the screw 302 is tightened to fix the heat transfer pipe 7. Subsequently, the clamp 503 is fixed to the heat transfer pipe 7, and the sensor unit 4 is fixed to the work bench 1 with the heat transfer pipe 7 interposed between the anti-vibration strip front clamping piece 401 and the anti-vibration strip rear clamping piece 402.
When the random excitation device 6 is started, the heat transfer pipe 7 is subjected to an excitation force transmitted by the random excitation device 6 through the vibration rod 501, and micro-amplitude vibration is generated at the contact position of the anti-vibration strip front clamping piece 401 and the anti-vibration strip rear clamping piece 402. The displacement sensor 403 records the displacement amplitude of the heat transfer pipe 7 and feeds the displacement amplitude back to the controller to adjust the output current, and then controls the output of the random excitation device 6, so that the displacement amplitude of the heat transfer pipe 7 at the limited position is controlled to be a desired value.
Claims (10)
1. The vertical type direction-variable random excitation lower heat transfer pipe fretting wear test device is characterized by comprising a working bench (1), a bottom plate (2), random excitation equipment (6) and a heat transfer pipe (7), wherein the working bench (1) is fixedly arranged on the bottom plate (2), the random excitation equipment (6) is arranged on the bottom plate (2) in a matching mode, and the random excitation equipment (6) can slide by taking the working bench (1) as a circle center so as to adjust an angle; the automatic vibration-damping device is characterized in that a groove guide rail (101) is arranged on the main plane of the working table frame (1), bearing seat assemblies (3) are arranged at the upper end and the lower end of the groove guide rail (101) close to the working table frame (1) respectively, the two ends of the heat transfer pipe (7) are fixedly arranged on the bearing seat assemblies (3) respectively, and a vibration rod assembly (5) is arranged on the heat transfer pipe (7) and connected with random vibration excitation equipment (6) through the vibration rod assembly (5).
2. The vertical direction-changeable random excitation lower heat transfer pipe fretting wear test device according to claim 1, wherein a sensor assembly (4) is arranged on the main plane of the workbench frame (1) between the two bearing seat assemblies (3) and is used for monitoring the displacement amplitude of the contact position of the heat transfer pipe in the vibration process in real time.
3. The vertical direction-changeable random excitation downdraft heat transfer pipe fretting wear test device according to claim 2, wherein the sensor assembly (4) comprises a vibration-proof strip front clamping piece (401), a vibration-proof strip rear clamping piece (402), a sensor mounting frame (404) and a displacement sensor (403), the vibration-proof strip front clamping piece (401) and the vibration-proof strip rear clamping piece (402) are arranged at the same height of the workbench frame (1), and the displacement sensor (403) is fixed on the vibration-proof strip front clamping piece (401) and the vibration-proof strip rear clamping piece (402) through the sensor mounting frame (404).
4. The vertical direction-changeable random excitation downdraft heat transfer tube fretting wear test device according to claim 2, wherein four groove guide rails (101) are arranged in parallel on the main plane of the workbench frame (1), a group of small sliding blocks (103) with threaded holes are arranged in the groove guide rails (101), and a group of square holes (102) for placing the small sliding blocks (103) in advance are arranged at the edges of the groove guide rails (101).
5. The vertical direction-changeable random excitation downdraft tube fretting wear test device according to claim 4, wherein the bearing block assembly (3) and the sensor assembly (4) are respectively fixedly arranged on a small slide block (103), and the small slide block (103) can be used for adjusting the vertical position on the main plane of the workbench (1).
6. The vertical direction-changeable random excitation downdraft heat transfer pipe fretting wear test device according to claim 1, wherein the bearing seat assembly (3) comprises a bearing seat (301) and a bearing seat inner sleeve (303), two bearings are arranged in the bearing seat (301), the bearing inner sleeve (303) is arranged in the bearings in an interference fit mode, and the heat transfer pipe is fixed by tightening a screw (302) on the bearing seat inner sleeve (303).
7. The vertical direction-changeable random excitation downpipe fretting wear test device according to claim 1, wherein the vibration rod assembly (5) comprises a vibration rod (501), a load sensor (502) and a clamp (503), one end of the vibration rod (501) is fixed on the random excitation device (6), the other end of the vibration rod is connected with the load sensor (502), and the load sensor (502) is welded on the clamp (503) and fixed on the heat transfer pipe (7) through the clamp (503).
8. The vertical direction-changeable random excitation downcomer fretting wear test device according to claim 1, characterized in that four lifting lugs (104) are arranged above the work bench (1) to facilitate the transportation, loading and unloading of the work bench (1), and lug plates (105) are respectively arranged on the two side planes of the work bench (1).
9. The vertical direction-changeable random excitation downdraft heat transfer tube fretting wear test device according to claim 1, wherein two circular arc slide rails (201) are arranged on the bottom plate (2), and angle marking lines are engraved on the outer sides of the circular arc slide rails (201).
10. The vertical direction-changeable random excitation downdraft heat transfer tube fretting wear test device according to claim 9, wherein four brakable rollers are arranged at the bottom end of the random excitation device (6), and a front part and a rear part of the four brakable rollers are respectively arranged in the two arc slide rails (201) in a matching manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432769.0A CN113063691A (en) | 2021-04-21 | 2021-04-21 | Vertical direction-changeable random excitation heat transfer pipe fretting wear test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432769.0A CN113063691A (en) | 2021-04-21 | 2021-04-21 | Vertical direction-changeable random excitation heat transfer pipe fretting wear test device |
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| Publication Number | Publication Date |
|---|---|
| CN113063691A true CN113063691A (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110432769.0A Withdrawn CN113063691A (en) | 2021-04-21 | 2021-04-21 | Vertical direction-changeable random excitation heat transfer pipe fretting wear test device |
Country Status (1)
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|---|---|
| CN (1) | CN113063691A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506645A (en) * | 2021-07-08 | 2021-10-15 | 浙江工业大学 | Micro-amplitude impact wear test device for U-shaped heat transfer pipe |
| 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 |
| CN113959878A (en) * | 2021-09-26 | 2022-01-21 | 浙江工业大学 | Experimental device for sliding wear between heat exchange tubes |
-
2021
- 2021-04-21 CN CN202110432769.0A patent/CN113063691A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506645A (en) * | 2021-07-08 | 2021-10-15 | 浙江工业大学 | Micro-amplitude impact wear test device for U-shaped heat transfer pipe |
| CN113506645B (en) * | 2021-07-08 | 2024-05-28 | 浙江工业大学 | U-shaped heat transfer tube micro-amplitude impact abrasion test device |
| 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 |
| CN113959878A (en) * | 2021-09-26 | 2022-01-21 | 浙江工业大学 | Experimental device for sliding wear between heat exchange tubes |
| CN113959878B (en) * | 2021-09-26 | 2024-05-03 | 浙江工业大学 | Experimental device for sliding abrasion between heat exchange tubes |
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Application publication date: 20210702 |
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| WW01 | Invention patent application withdrawn after publication |