阅读说明：本技术 高温工况下u型传热管微动磨损实验装置 (Fretting wear experimental device for U-shaped heat transfer pipe under high-temperature working condition ) 是由 周明珏 徐昆仑 董旭鑫 戴斌斌 潘铭鹏 汪志欣 杨柯 周水清 于 2021-09-01 设计创作，主要内容包括：本发明公开了高温工况下U型传热管微动磨损实验装置,包括U型传热管、固定装置、冲击传感器装置、温控装置、水流冲击装置和外壳,所述U型传热管通过固定装置固定在U型的试验台板的上表面,固定装置包括固定板、支撑器和抗振组件,冲击传感器装置固定在U型传热管上,监测U型传热管的微动状况,温控装置固定在试验台板中间空槽处,外壳罩在试验台板上,用于对实验装置进行保温,水流冲击装置连接U型传热管,将水流引入U型传热管中模拟流致振动导致的微动磨损。本发明营造了高温水流冲击的工况,解决了难以在高温工况水循环下研究U型传热管微动磨损的问题,实现了同时测量U型传热管弯管段与抗振条以及直管段与固定板、支撑器的微动磨损。(The invention discloses a U-shaped heat transfer pipe fretting wear experimental device under a high-temperature working condition, which comprises a U-shaped heat transfer pipe, a fixing device, an impact sensor device, a temperature control device, a water flow impact device and a shell, wherein the U-shaped heat transfer pipe is fixed on the upper surface of a U-shaped test bedplate through the fixing device, the fixing device comprises a fixing plate, a support and an anti-vibration assembly, the impact sensor device is fixed on the U-shaped heat transfer pipe and used for monitoring the fretting condition of the U-shaped heat transfer pipe, the temperature control device is fixed at a hollow groove in the middle of the test bedplate, the shell is covered on the test bedplate and used for preserving heat of the experimental device, the water flow impact device is connected with the U-shaped heat transfer pipe, and water flow is introduced into the U-shaped heat transfer pipe to simulate fretting wear caused by flow-induced vibration. The invention creates the working condition of high-temperature water flow impact, solves the problem that the fretting wear of the U-shaped heat transfer pipe is difficult to study under the water circulation of the high-temperature working condition, and realizes the simultaneous measurement of the fretting wear of the bent pipe section and the anti-vibration strip of the U-shaped heat transfer pipe as well as the fretting wear of the straight pipe section and the fixed plate and the support.)

1. U type heat-transfer pipe fretting wear experimental apparatus under high temperature operating mode, its characterized in that, including U type heat-transfer pipe (1), fixing device, impact sensor device (6), temperature control device, rivers impact device and shell, U type heat-transfer pipe (1) is fixed at the upper surface of the test platen (2) of U type through fixing device, and impact sensor device (6) are fixed on U type heat-transfer pipe (1), and temperature control device fixes in test platen (2) middle dead slot department, and the shell cover is on test platen (2), is used for keeping warm to experimental apparatus, and rivers impact device connects U type heat-transfer pipe (1), and the simulation flows in introducing U type heat-transfer pipe (1) and send the fretting wear that the vibration leads to.

2. The fretting wear testing device of the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 1, wherein the fixing device comprises a fixing plate (3), a support (4) and an anti-vibration assembly (5), one end of the fixing plate (3) is fixed on the upper surface of the testing table plate (2), the other end of the fixing plate is provided with a small hole, two ends of the U-shaped heat transfer pipe (1) penetrate through the small holes in the fixing plates (3) on two sides to be connected with a water flow impact device, the bent pipe section of the U-shaped heat transfer pipe (1) is provided with the anti-vibration assembly (5), the straight pipe section between the anti-vibration assembly (5) and the fixing plate (3) is provided with the support (4), and the anti-vibration assembly (5) and the support (4) are fixed on the testing table plate (2).

3. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 2, wherein the bent pipe section and the straight pipe section of the U-shaped heat transfer pipe (1) are both provided with impact sensor devices (6), and the impact sensor devices (6) are connected with a computer and used for monitoring the fretting condition of the U-shaped heat transfer pipe (1).

4. The fretting wear test device for the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 1, wherein the temperature control device comprises a plurality of electric heaters (7), and the electric heaters (7) are uniformly fixed at the middle empty groove of the test bed plate (2).

5. The U-shaped heat transfer pipe fretting wear experimental device under the high-temperature working condition as claimed in claim 1, wherein the outer shell comprises an outer cover body (8), an outer cover body lower door plate (9) and a handle (10), guide rails (11) are arranged on two sides of the upper surface of the test bedplate (2), the outer cover body (8) is buckled on the guide rails (11) and can slide back and forth along the guide rails (11), one end of the outer cover body (8) is sealed, the outer cover body lower door plate (9) is fixed at the slotted end of the test bedplate (2), the lower end of the outer cover body lower door plate is matched and closed with the slotted end, the upper end of the outer cover body lower door plate is contacted and closed with the other end of the outer cover body (8), and the outer cover body lower door plate (9) and the outer cover body (8) are both provided with the handle (10).

6. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition according to claim 5, wherein the water flow impact device comprises a water tank (12), a water pump (13) and a water pipe (14), the water pipe (14) is connected with the water tank (12) and the water pump (13), the water tank (12) is connected with one end part of the U-shaped heat transfer pipe (1) through the water pipe (14), the water pump (13) is connected with the other end part of the U-shaped heat transfer pipe (1) through the water pipe (14) to form a circulating water flow impact loop, and the water pipe (14) is connected with the end part of the U-shaped heat transfer pipe (1) through a steel pipe (15).

7. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 5, wherein a bimetallic thermometer (16) is arranged outside the outer cover body (8) and used for monitoring the temperature inside the outer cover body.

8. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 5, wherein the periphery of the upper surface of the test bedplate (2) is provided with a hanging ring (17), and the hanging ring (17) is positioned outside the outer cover body (8).

9. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition as claimed in claim 2, wherein the anti-vibration assembly (5) is of a U-shaped structure integrally and comprises U-shaped columns and anti-vibration strips (18) positioned between the U-shaped columns, bolts (20) penetrate through the anti-vibration strips (18) and fixing strips (19) positioned below the anti-vibration strips (18), the U-shaped heat transfer pipe (1) penetrates between the anti-vibration strips (18) and the fixing strips (19), the U-shaped heat transfer pipe (1) is extruded and fixed by rotating the bolts (20), and the bolts (20) are fixed by nuts (21); the whole U type structure that is of eyelidretractor (4), semicircular groove has been seted up to the upper end lower surface of eyelidretractor (4), is fixed with support bar (22) through bolt (20) simultaneously, same semicircular groove has been seted up to the upper surface of support bar (22), constitutes a through-hole with the semicircular groove of eyelidretractor (4) lower surface, thereby U type heat-transfer pipe (1) passes the through-hole and supports fixedly.

10. The device for testing fretting wear of the U-shaped heat transfer pipe under the high-temperature working condition according to claim 3, wherein the bent pipe section and the bent pipe section as well as the straight pipe section of the U-shaped heat transfer pipe (1) are respectively connected through a sleeve (23), one end of the impact sensor device (6) is fixed on the test bedplate (2), and the other end of the impact sensor device extends into the U-shaped heat transfer pipe (1) through the sleeve (23) for monitoring.

Technical Field

The invention belongs to the technical field of fretting wear tests of heat transfer pipes, and particularly relates to a fretting wear experimental device for a U-shaped heat transfer pipe under a high-temperature working condition.

Background

With continued research, it has been found that tube failure caused by wear (primarily fretting) becomes 690 the most significant failure mode for heat transfer tubes. Fretting wear parts mainly occur between the heat transfer pipe and its supporting structure (pipe plate, vibration-proof strip, etc.), and most of the prior art only tests the wear degree of the straight pipe section or the bent pipe section of the U-shaped heat transfer pipe.

At present, a lot of fretting wear tests are researched, but most of the wear studies on heat transfer pipes are carried out at room temperature, and some scholars obtain that the high-temperature and high-pressure water environment of a nuclear reactor has important influence on fretting wear through research. Compared with the room temperature condition, the abrasion degree between the heat transfer pipe and the supporting structure thereof can be weakened in the high-temperature and high-pressure water environment, and further, the subsequent analysis result is inaccurate. Still other scholars believe that the results at room temperature for actual service life prediction may be risky or too conservative.

Disclosure of Invention

In order to solve the problems, the invention aims to provide an experimental device for fretting wear of a U-shaped heat transfer pipe under a high-temperature working condition.

In order to achieve the purpose, the following technical scheme is provided:

u type heat-transfer pipe fretting wear experimental apparatus under high temperature operating mode, including U type heat-transfer pipe, fixing device, impact sensor device, temperature control device, rivers impact device and shell, U type heat-transfer pipe passes through fixing device to be fixed at the upper surface of the test platen of U type, and impact sensor device fixes on U type heat-transfer pipe, and temperature control device fixes dead slot department in the middle of the test platen, and the shell covers on the test platen for keep warm to experimental apparatus, and U type heat-transfer pipe is connected to rivers impact device, and the simulation flows in introducing U type heat-transfer pipe with rivers and causes the fretting wear that the vibration leads to.

Furthermore, the fixing device comprises a fixing plate, a support and an anti-vibration assembly, one end of the fixing plate is fixed on the upper surface of the test bedplate, a small hole is formed in the other end of the fixing plate, two end parts of the U-shaped heat transfer pipe penetrate through the small holes in the fixing plates on two sides to be connected with the water flow impact device, the anti-vibration assembly is arranged on the bent pipe section of the U-shaped heat transfer pipe, the support is arranged on the straight pipe section between the anti-vibration assembly and the fixing plate, and the anti-vibration assembly and the support are fixed on the test bedplate.

Furthermore, the bent pipe section and the straight pipe section of the U-shaped heat transfer pipe are both provided with impact sensor devices, and the impact sensor devices are connected with a computer and used for monitoring the micro-motion condition of the U-shaped heat transfer pipe.

Furthermore, the temperature control device comprises a plurality of electric heaters which are uniformly fixed at the middle empty groove of the test bed plate, and the temperature can be adjusted according to the setting of the test and the requirement of the working condition.

Further, the shell include the outer cover body, door plant and handle under the outer cover body, the guide rail has been seted up to the upper surface both sides of experimental platen, outer cover body buckle on the guide rail and can be along guide rail reciprocating sliding, the one end of the outer cover body is sealed, the door plant is fixed in the fluting end of experimental platen under the outer cover body, the lower extreme agrees with the fluting end closed, the upper end touches the closure with the other end of the outer cover body, all be equipped with the handle on door plant and the outer cover body under the outer cover body, make things convenient for the push-and-pull.

Furthermore, the water flow impact device comprises a water tank, a water pump and a water pipe, the water pipe is connected with the water tank and the water pump, the water tank is connected with one end part of the U-shaped heat transfer pipe through the water pipe, the water pump is connected with the other end part of the U-shaped heat transfer pipe through the water pipe to form a circulating water flow impact loop, the water pipe is connected with the end part of the U-shaped heat transfer pipe through a steel pipe, and the water flow speed can be adjusted according to the setting of tests and the requirements of working conditions.

Furthermore, a bimetallic thermometer is arranged outside the outer layer cover body and used for monitoring the temperature inside the outer layer cover body.

Furthermore, the upper surface of the test bedplate is provided with hanging rings all around, the hanging rings are located outside the outer cover body, the test bedplate is too heavy and complex in structure, and the hanging rings are used for facilitating moving, fixing and assembling the test bed.

Furthermore, the whole anti-vibration assembly is of a U-shaped structure and comprises U-shaped stand columns and anti-vibration strips positioned between the U-shaped stand columns, bolts penetrate through the anti-vibration strips and fixing strips positioned below the anti-vibration strips, the U-shaped heat transfer pipe penetrates through the anti-vibration strips and the fixing strips, the U-shaped heat transfer pipe is extruded and fixed through the rotary bolts, and the bolts are fixed through nuts to restrict the movement of the U-shaped heat transfer pipe in two directions of the vertical plane; the whole U type structure that is of eyelidretractor, semicircular groove has been seted up to the upper end lower surface of eyelidretractor, has the support bar through the bolt fastening simultaneously, and same semicircular groove has been seted up to the upper surface of support bar, constitutes a through-hole with the semicircular groove of eyelidretractor lower surface, thereby U type heat-transfer pipe passes the through-hole and supports fixedly, carries out the full restraint to the straight tube section of U type heat-transfer pipe.

Furthermore, the bent pipe section and the bent pipe section of the U-shaped heat transfer pipe, and the straight pipe section of the U-shaped heat transfer pipe are respectively connected through a sleeve, one end of the impact sensor device is fixed on the test bedplate, and the other end of the impact sensor device extends into the U-shaped heat transfer pipe through the sleeve for monitoring.

When a test is carried out, the outer cover body and the lower door plate of the outer cover body are closed through special high-temperature-resistant silica gel at the contact position, the test bedplate is fixed on a plane to form a temporary closed heat-insulation entity, and meanwhile, a water pump is turned on, and water circulation is realized inside the U-shaped heat transfer pipe; when the experiment ended, closed the water pump, opened outer cover body lower door plant through the handle and realized opening and shutting, thereby the rethread is the outer cover body of hand pushing on the guide rail, thereby opens outer cover body and adjusts experimental setting.

The invention has the beneficial effects that: the invention creates the working condition of high-temperature water flow impact, solves the problem that the fretting wear of the U-shaped heat transfer pipe is difficult to research under the water circulation of the high-temperature working condition, and solves the problem that the fretting wear of the bent pipe section and the anti-vibration strip of the U-shaped heat transfer pipe, and the fretting wear of the straight pipe section and the fixed plate and the support are difficult to measure simultaneously.

Drawings

FIG. 1 is a schematic view of the overall external structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic perspective view of the anti-vibration assembly of the present invention;

FIG. 4 is a schematic view of the overall structure of the support of the present invention;

fig. 5 is a schematic perspective view of an impact sensor device according to the present invention.

In the figure: 1. a U-shaped heat transfer tube; 2. a test platen; 3. a fixing plate; 4. a support; 5. an anti-vibration assembly; 6. an impact sensor device; 7. an electric heater; 8. an outer cover body; 9. a lower door plate of the outer cover body; 10. a handle; 11. a guide rail; 12. a water tank; 13. a water pump; 14. a water pipe; 15. a steel pipe; 16. a bimetallic thermometer; 17. a hoisting ring; 18. anti-vibration strips; 19. a fixing strip; 20. a bolt; 21. a nut; 22. a supporting strip; 23. a sleeve.

Detailed Description

The scope of the present invention will be further described with reference to the drawings attached to the specification, but the scope of the present invention is not limited thereto.

As shown in FIG. 1 and FIG. 2, the fretting wear test device for U-shaped heat transfer tubes under high temperature working conditions comprises a U-shaped heat transfer tube 1, a test bedplate 2, a fixing plate 3, a support 4, an anti-vibration assembly 5, an impact sensor device 6, an electric heater 7, an outer cover body 8, an outer cover body lower door plate 9, a handle 10, a water tank 12, a water pump 13 and a water pipe 14, wherein one end of the fixing plate 3 is fixed on the upper surface of the test bedplate 2 through a bolt 20, the other end of the fixing plate is provided with a small hole, two end parts of the U-shaped heat transfer tube 1 penetrate through the small holes on the fixing plates 3 at two sides to be connected with the water pipe 14, the anti-vibration assembly 5 is arranged on a bent tube section of the U-shaped heat transfer tube 1, the support 4 is arranged on a straight tube section between the anti-vibration assembly 5 and the fixing plate 3, the anti-vibration assembly 5 and the support 4 are fixed on the test bedplate 2 through the bolt 20, and the impact sensor device 6 is arranged on both the bent tube section and the straight tube section of the U-shaped heat transfer tube 1, the impact sensor device 6 is connected with a computer and used for monitoring the micro-motion condition of the U-shaped heat transfer pipe 1, the impact sensor device 6 is fixed on the U-shaped heat transfer pipe 1 through a bolt 20, a plurality of electric heaters 7 are uniformly fixed at a hollow groove in the middle of the test bedplate 2 and are arranged in a triangular shape, two sides of the upper surface of the test bedplate 2 are respectively provided with a guide rail 11, an outer-layer cover body 8 is in a semi-cylindrical shape, the outer-layer cover body 8 is buckled on the guide rails 11 and can slide back and forth along the guide rails 11, one end of the outer-layer cover body 8 is sealed, a lower door panel 9 of the outer-layer cover body is fixed at the slotted end of the test bedplate 2, the lower end of the outer-layer cover body is closed with the slotted end, the upper end of the outer-layer cover body 8 is contacted with the other end of the outer-layer cover body, after the test bedplate 2 is fixed on a plane, a temporary closed space is formed and used for insulating the experimental device, handles 10 are arranged on the lower door panel 9 of the outer-layer cover body and the outer-layer cover body 8, a water pipe 14 is connected with a water tank 12 and a water pump 13, the water tank 12 is connected with one end part of the U-shaped heat transfer pipe 1 through the water pipe 14, the water pump 13 is connected with the other end part of the U-shaped heat transfer pipe 1 through the water pipe 14 to form a circulating water flow impact loop, the water pipe 14 is connected with the end part of the U-shaped heat transfer pipe 1 through a steel pipe 15 card in an inserting mode, and water flow is led into the U-shaped heat transfer pipe 1 to simulate fretting wear caused by flow-induced vibration; outer cover body 8 outside is equipped with bimetal thermometer 16 for the inside temperature of monitoring requires the temperature of adjusting electric heater 7 through the operating mode, and the upper surface of test platen 2 is equipped with rings 17 all around, and rings 17 are located outer cover body 8 outside.

As shown in fig. 3, the anti-vibration assembly 5 is of a U-shaped structure as a whole, and includes U-shaped columns and anti-vibration bars 18 located between the U-shaped columns, bolts 20 pass through the anti-vibration bars 18 and fixing bars 19 located below the anti-vibration bars 18, the U-shaped heat transfer pipe 1 passes through between the anti-vibration bars 18 and the fixing bars 19, the U-shaped heat transfer pipe 1 is pressed and fixed by rotating the bolts 20, and the bolts 20 are fixed by nuts 21.

As shown in fig. 4, the whole supporter 4 is of a U-shaped structure, a semicircular groove is formed in the lower surface of the upper end of the supporter 4, a supporting bar 22 is fixed through a bolt 20, the same semicircular groove is formed in the upper surface of the supporting bar 22, a through hole is formed by the semicircular groove and the lower surface of the supporter 4, and the U-shaped heat transfer pipe 1 passes through the through hole to be supported and fixed.

As shown in fig. 5, the bent tube section and the bent tube section, and the straight tube section of the U-shaped heat transfer tube 1 are connected by a sleeve 23, one end of the impact sensor device 6 is fixed on the test bed plate 2, and the other end thereof extends into the U-shaped heat transfer tube 1 through the sleeve 23 for monitoring.