CN215811562U - Strip spring fatigue test device - Google Patents
Strip spring fatigue test device Download PDFInfo
- Publication number
- CN215811562U CN215811562U CN202023032681.XU CN202023032681U CN215811562U CN 215811562 U CN215811562 U CN 215811562U CN 202023032681 U CN202023032681 U CN 202023032681U CN 215811562 U CN215811562 U CN 215811562U
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- China
- Prior art keywords
- strip spring
- test device
- plate
- strip
- fatigue test
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 125000006850 spacer group Chemical group 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 32
- 239000000446 fuel Substances 0.000 claims description 4
- 239000012634 fragment Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本公开属于核电技术领域，具体涉及一种条带弹簧疲劳试验装置。本公开通过通过垫块和测试棒共同压抵条带弹簧的钢凸和弹片，对弹簧与底板接触处进行压点约束，并通过多个压块压抵条带弹簧上每个弹片一侧的位置，即能够有效固定条带弹簧，又能够模拟条带弹簧之间相互搭接情况下的受力情况，从而逼真的模拟了条带弹簧真实工况约束条件，解决了无法对条带弹簧整体疲劳性能进行测试研究的难题。可以实现对弹簧真实工况的模拟并进行测试，为研究条带弹簧疲劳性能提供了重要的理论指导和技术支撑，具有重要的科学意义和工程应用价值。
The disclosure belongs to the technical field of nuclear power, and in particular relates to a strip spring fatigue test device. In the present disclosure, the steel protrusions and the elastic pieces of the strip spring are pressed together by the spacer block and the test rod, so as to constrain the pressure point at the contact point between the spring and the bottom plate, and a plurality of pressure blocks are used to press against the strip spring on one side of each elastic piece. position, that is, it can effectively fix the strip spring, and it can simulate the force situation when the strip springs overlap each other, so as to realistically simulate the constraints of the real working conditions of the strip spring, and solve the problem that the overall strip spring cannot be adjusted. Fatigue performance testing problems. It can simulate and test the real working conditions of the spring, provide important theoretical guidance and technical support for the study of the fatigue performance of the strip spring, and has important scientific significance and engineering application value.
Description
Technical Field
The utility model belongs to the technical field of nuclear power, and particularly relates to a strip spring fatigue test device.
Background
The strip spring is widely applied to the production of nuclear fuel elements and plays a key supporting role, so that the fatigue performance of the strip spring is directly related to the service life and the reliability of equipment. However, because the strip spring has a special size and is complex in stress condition in the service process, the current test and research on the fatigue performance of the strip spring are carried out on the basis of a single spring or the simplification of the actual working condition. With the improvement of the requirements on the quality and service life of the equipment, the traditional test method and means cannot meet the requirements of engineering application, so that the fatigue performance of the whole strip spring is urgently required to be tested by proper equipment according to the actual service working condition.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, a strip spring fatigue test device is provided.
According to an aspect of the embodiments of the present disclosure, there is provided a strip spring fatigue test apparatus including: the test device comprises a bottom plate, a pressing plate, a test rod, a plurality of pressing blocks and a plurality of cushion blocks;
the upper surface of the bottom plate is provided with a plurality of grooves, a cushion block is embedded in each groove, and the arc-shaped upper surface of each cushion block faces to the opening of the embedded groove;
the strip spring to be tested covers the strip grooves, and the upper surface of each cushion block is in contact with one steel projection;
the pressing plate is connected above the bottom plate, a plurality of grooves are formed in the lower surface of the pressing plate, a pressing block is embedded into each groove, the lower surface of each pressing block presses against one side of an elastic sheet on the upper surface of the strip spring to be detected, and each elastic sheet is located between two pressing blocks;
the upper end of the test rod is connected with a fatigue testing machine, the press plate is of a square frame structure, the lower end of the test rod can penetrate through the inner frame of the press plate and is pressed against the elastic sheet of each strip spring to be tested, and the fatigue testing machine is used for applying pressure of a plurality of preset thresholds to the test rod to test the fatigue pressure value of the strip spring to be tested.
In a possible implementation manner, the plurality of cushion blocks are divided into a plurality of groups, the height of each group of cushion blocks is the same, the number of each group of cushion blocks is the same as the number of the plurality of grooves, and the heights of different groups of cushion blocks are different.
In one possible implementation, the lower surface of each compact is planar, and the width of the lower surface of each compact is smaller than the width of the upper surface of the compact.
In a possible implementation manner, the lower end of the test rod comprises a plurality of pressure heads, and each pressure head can press against one elastic sheet of the strip spring to be tested.
In one possible implementation, the pressure plate is connected to the base plate by a plurality of screws.
In one possible implementation, the pressure plate and the bottom plate are aligned by a plurality of positioning pins axially penetrating the pressure plate and the bottom plate.
In a possible implementation manner, a plurality of positioning grooves are formed in the edge of the strip spring to be tested, and a plurality of positioning threaded holes are formed in the bottom plate and the pressing plate along the axial direction;
the strip spring fatigue test device further comprises a plurality of positioning screws, and each positioning screw is in threaded connection with one positioning threaded hole of the bottom plate and one positioning threaded hole of the lower pressing plate and clamped in one positioning groove.
In one possible implementation, the curvature of the upper surface of the spacer corresponds to the curvature of the side of the fuel rod.
In one possible implementation, the strip spring fatigue testing device further comprises a plurality of baffles, and each baffle is connected to one side surface of the bottom plate.
In a possible implementation, each baffle is connected with the bottom plate through screws.
The beneficial effect of this disclosure lies in: this is disclosed through pressing the protruding and shell fragment of steel that supports strip spring through cushion and test rod jointly, press the point restraint to spring and bottom plate contact department, and press the position of supporting every shell fragment one side on the strip spring through a plurality of briquettings, can effectively fix the strip spring promptly, can simulate the atress condition under the mutual overlap joint condition between the strip spring again, thereby lifelike simulation the real operating mode constraint condition of strip spring, solved and to have carried out the difficult problem of test study to the whole fatigue performance of strip spring. The simulation and test of the real working condition of the spring can be realized, important theoretical guidance and technical support are provided for the research of the fatigue performance of the strip spring, and the strip spring has important scientific significance and engineering application value.
Drawings
FIG. 1 is a schematic illustration of a strip spring fatigue testing apparatus shown according to an exemplary embodiment.
FIG. 2 is a top view of a strap spring fatigue testing apparatus shown in accordance with an exemplary embodiment.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
In the disclosure, one side of the strip spring may be a steel protrusion, a position of the other side of the strip spring, which is opposite to the steel protrusion, may be a spring plate, and the steel protrusion and the spring plate of the strip spring are simultaneously extruded by different fuel rods in the actual service process of the strip spring.
FIG. 1 is a schematic illustration of a strip spring fatigue testing apparatus shown according to an exemplary embodiment. As shown in fig. 1, the strip spring fatigue test apparatus includes: the test device comprises a bottom plate 2, a pressure plate 6, a test rod 4, a plurality of pressing blocks 3 and a plurality of cushion blocks 5;
as shown in fig. 1, the bottom plate may be fixedly connected to a fixed mount 1 of the mobile workbench, the upper surface of the bottom plate 2 is provided with a plurality of grooves, a cushion block 5 is embedded in each groove, and the arc-shaped upper surface of each cushion block 5 faces the opening of the embedded groove;
the strip spring 10 to be tested covers the strip grooves, and the upper surface of each cushion block 5 is in contact with one steel projection 101;
the platen 6 is attached above the base plate 2 and fig. 2 is a top view of a strip spring fatigue testing apparatus according to an exemplary embodiment. As shown in fig. 2, the pressure plate 6 is connected to a base plate (not shown in fig. 2) by a plurality of screws 8, and the pressure plate 6 and the base plate 2 may be aligned by a plurality of positioning pins 7 axially penetrating the pressure plate 6 and the base plate 2.
As shown in fig. 1, a plurality of grooves are formed in the lower surface of the pressing plate 6, each pressing block 3 is embedded in each groove, the lower surface of each pressing block 3 is pressed against one side of the elastic sheet 100 on the upper surface of the strip spring 10 to be tested, and each elastic sheet 100 is located between two pressing blocks 3;
in one possible implementation, as shown in fig. 1, the lower surface of each compact 3 is a plane, and the width of the lower surface of each compact 3 is smaller than the width of the upper surface of the compact 3. The stress state of the strip springs 10 which are mutually overlapped can be simulated more realistically.
The upper end of the test rod 4 is connected with a fatigue testing machine, the press plate 6 is of a circular frame structure, the lower end of the test rod 4 can penetrate through the inner frame of the press plate 6 to be pressed against the elastic sheet 100 of each strip spring 10 to be tested, and the fatigue testing machine is used for applying pressure of a plurality of preset thresholds to the test rod 4 to test the fatigue pressure value of the strip spring 10 to be tested.
During fatigue test, ensuring that the contact surface of the grid spring and the fuel rod is subjected to positive pressure in the whole test process, compressing the grid spring to nominal displacement during the test, then applying a certain compression amount, loading the grid spring at the position in a reciprocating manner according to the cyclic load, and recording the cycle times of the grid spring when the grid spring is completely broken; if 1 x 107 load cycles are completed without breaking the lattice springs, the test can be stopped.
This is disclosed through pressing the protruding and shell fragment of steel that supports strip spring through cushion and test rod jointly, press the point restraint to spring and bottom plate contact department, and press the position of supporting every shell fragment one side on the strip spring through a plurality of briquettings, can effectively fix the strip spring promptly, can simulate the atress condition under the mutual overlap joint condition between the strip spring again, thereby lifelike simulation the real operating mode constraint condition of strip spring, solved and to have carried out the difficult problem of test study to the whole fatigue performance of strip spring. The simulation and test of the real working condition of the spring can be realized, important theoretical guidance and technical support are provided for the research of the fatigue performance of the strip spring, and the strip spring has important scientific significance and engineering application value.
In a possible implementation manner, the plurality of cushion blocks are divided into a plurality of groups, the height of each group of cushion blocks is the same, the number of each group of cushion blocks is the same as the number of the plurality of grooves, and the heights of different groups of cushion blocks are different.
In one possible implementation, the lower end of the test rod comprises a plurality of pressure heads, each pressure head being capable of pressing against one of the resilient strips of the strip spring to be tested. Therefore, a plurality of elastic sheets can be tested simultaneously, and the testing efficiency is improved.
In one possible implementation mode, a plurality of positioning grooves are formed in the edge of the strip spring to be tested, and a plurality of positioning threaded holes are formed in the bottom plate and the pressing plate along the axial direction; the strip spring fatigue test device also comprises a plurality of positioning screws, and each positioning screw is in threaded connection with one positioning threaded hole of the bottom plate and one positioning threaded hole of the lower pressing plate and is clamped in one positioning groove. This further secures the strip spring to be tested.
In a possible implementation manner, the plurality of cushion blocks are divided into a plurality of groups, the height of each group of cushion blocks is the same, the number of each group of cushion blocks is the same as the number of the plurality of grooves, and the heights of different groups of cushion blocks are different. In this way, different pre-deformation amounts of the actual spring during installation can be simulated by inserting cushion blocks with different heights.
As shown in fig. 2, the strip spring fatigue testing apparatus further includes a plurality of baffles 9, each baffle 10 being attached to one side of a base plate (not shown) under the pressure plate 4. This further effectively fixes the strip spring to be tested. Wherein each baffle plate is connected with the bottom plate through a screw.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032681.XU CN215811562U (en) | 2020-12-16 | 2020-12-16 | Strip spring fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032681.XU CN215811562U (en) | 2020-12-16 | 2020-12-16 | Strip spring fatigue test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215811562U true CN215811562U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023032681.XU Withdrawn - After Issue CN215811562U (en) | 2020-12-16 | 2020-12-16 | Strip spring fatigue test device |
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| Country | Link |
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| CN (1) | CN215811562U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525515A (en) * | 2020-12-16 | 2021-03-19 | 中核建中核燃料元件有限公司 | Strip spring fatigue test device |
| CN116380655A (en) * | 2023-03-30 | 2023-07-04 | 苏州热工研究院有限公司 | Grid spring stress corrosion test device |
-
2020
- 2020-12-16 CN CN202023032681.XU patent/CN215811562U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525515A (en) * | 2020-12-16 | 2021-03-19 | 中核建中核燃料元件有限公司 | Strip spring fatigue test device |
| CN112525515B (en) * | 2020-12-16 | 2025-02-11 | 中核建中核燃料元件有限公司 | Strip spring fatigue test device |
| CN116380655A (en) * | 2023-03-30 | 2023-07-04 | 苏州热工研究院有限公司 | Grid spring stress corrosion test device |
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| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20220211 Effective date of abandoning: 20250211 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20220211 Effective date of abandoning: 20250211 |