CN113820224B - High-temperature creep test device applied to exhaust system - Google Patents
High-temperature creep test device applied to exhaust system Download PDFInfo
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- CN113820224B CN113820224B CN202111118730.8A CN202111118730A CN113820224B CN 113820224 B CN113820224 B CN 113820224B CN 202111118730 A CN202111118730 A CN 202111118730A CN 113820224 B CN113820224 B CN 113820224B
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- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a high-temperature creep test device applied to an exhaust system, which comprises a base platform, a temperature control box, a computer and at least two groups of test mechanisms, wherein the temperature control box, the computer and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform; the testing mechanism comprises a bearing bracket, a tube furnace, a plurality of weights, at least two groups of guide posts, weight trays, a distance measuring sensor, a first fixing rod, a second fixing rod, a first clamping head, a second clamping head and a test sample piece which are connected with each other; the test sample piece is positioned in the accommodating space of the tube furnace, and the tube furnace is fixedly connected with the bearing bracket; the ranging sensor is located below the weight tray and fixedly connected with the bearing bracket. The test device provided by the invention realizes real-time collection of time, temperature and creep amount curves, realizes accurate temperature control on the temperature in the furnace, can realize parallel connection of a plurality of tube furnaces, controls simultaneously, and improves the working efficiency.
Description
Technical Field
The invention belongs to the technical field of automobile exhaust systems, and particularly relates to a high-temperature creep test device applied to an exhaust system.
Background
At present, when the hot end metal of an automobile exhaust system works, the temperature can reach more than 900 ℃, the material is subjected to continuous load under the action of high temperature, the problems of creep failure and the like are easy to occur, the service temperature at a silica gel lifting lug is also increased along with the rise of the exhaust temperature of a national sixth exhaust product, and the high temperature creep performance is an index which needs to be checked in a key way under the condition of long-term load.
The high-temperature creep testing equipment in the related technology is used for testing mechanical properties of materials, and can be used for carrying out conventional creep and endurance tests, stress relaxation tests, high-temperature short-time tensile tests, low-cycle tests and the like.
However, the testing equipment for high-temperature creep in the related art cannot automatically judge the creep amount of the material, cannot accurately control and collect the temperature of the tube furnaces, cannot connect a plurality of tube furnaces in parallel, and has low working efficiency.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides a high-temperature creep test device applied to an exhaust system, and aims to solve the technical problems of realizing real-time acquisition of time, temperature and creep amount curves, realizing accurate temperature control on the temperature in a furnace, enabling a plurality of tube furnaces to be connected in parallel, controlling the tube furnaces simultaneously and improving the working efficiency.
The technical scheme is as follows: in order to achieve the above purpose, the invention adopts the following technical scheme:
the high-temperature creep test device applied to the exhaust system comprises a base platform, a temperature control box, a computer and at least two groups of test mechanisms, wherein the temperature control box, the computer and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform;
the testing mechanism comprises a bearing bracket, a tube furnace, a plurality of weights, at least two groups of guide posts, a weight tray, a ranging sensor, a first fixing rod, a second fixing rod, a first clamping head, a second clamping head and a test sample;
the bottom of the bearing bracket is fixedly connected with the top surface of the base platform; the bottoms of at least two groups of guide posts are fixedly connected with the bottom end of the bearing bracket; the weight tray is positioned between at least two groups of guide posts and is in sliding connection with the at least two groups of guide posts; the weights are arranged on the weight tray, and the weights are provided with openings;
the first end of the first fixing rod penetrates through the opening to be fixedly connected with the weight tray, and the second end of the first fixing rod is in threaded connection with the first end of the first chuck;
the first end of the second fixing rod is fixedly connected with the top end of the bearing bracket, and the second end of the second fixing rod is in threaded connection with the first end of the second chuck;
two ends of the test sample piece are respectively and fixedly connected with the second end of the first chuck and the second end of the second chuck;
the test sample piece is positioned in the accommodating space of the tube furnace, and the tube furnace is fixedly connected with the bearing bracket;
the distance measuring sensor is positioned below the weight tray and fixedly connected with the bearing bracket;
the temperature control box is electrically connected with the tube furnace, and the distance measuring sensor and the temperature control box are both in communication connection with the computer.
Optionally, the tube furnace is fixedly connected with the bearing bracket through at least four groups of connecting plates.
Optionally, the side wall of the tube furnace is fixedly connected with the bearing bracket through six groups of connecting plates.
Optionally, both ends of the test sample piece are respectively and fixedly connected with the second end of the first chuck and the second end of the second chuck through fixing pins.
Optionally, the test mechanisms are two groups, and the two groups of test mechanisms are parallel to each other.
Optionally, the guide posts are two groups, the guide posts are symmetrically arranged about the central axis of the weight tray, and the two groups of guide posts are perpendicular to the weight tray.
Optionally, the axle wire of weight tray, the axle wire of first dead lever, the axle wire of first chuck, the axle wire of test sample piece, the axle wire of second chuck, the axle wire of second dead lever and the axle wire of range sensor all coincide.
Optionally, the bearing bracket is C-shaped, and the tubular furnace is cylindrical with a hollow inside.
The beneficial effects are that: compared with the prior art, the high-temperature creep test device applied to the exhaust system provided by the invention realizes real-time acquisition of time, temperature and creep curve, realizes accurate temperature control on the temperature in the furnace, can realize parallel connection of a plurality of tube furnaces, controls simultaneously, and improves the working efficiency.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a high temperature creep test apparatus for an exhaust system according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of a test mechanism of a high temperature creep test apparatus for an exhaust system according to an exemplary embodiment of the present invention;
in the figure: 1. a base platform; 2. a temperature control box; 3. a computer; 4. a bearing bracket; 5. a tube furnace; 6. a weight; 601. an opening; 7. a guide post; 8. a weight tray; 9. a ranging sensor; 10. a first fixing rod; 11. a second fixing rod; 122. a first chuck; 13. a second chuck; 14. a test sample; 15. a connecting plate; 16. a fixing pin.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, the high temperature creep test device applied to an exhaust system comprises a base platform 1, a temperature control box 2, a computer 3 and at least two groups of test mechanisms, wherein the temperature control box 2, the computer 3 and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform 1, and optionally, the connection modes of the temperature control box 2, the computer 3 and the at least two groups of test mechanisms and the base platform 1 comprise but are not limited to one of welding, riveting and bolting;
as shown in fig. 2, the testing mechanism comprises a bearing bracket 4, a tube furnace 5, a plurality of weights 6, at least two groups of guide posts 7, a weight tray 8, a distance measuring sensor 9, a first fixing rod 10, a second fixing rod 11, a first clamping head 12, a second clamping head 13 and a test sample 14;
as shown in fig. 1 and 2, the bottom of the bearing bracket 4 is fixedly connected with the top surface of the base platform 1, and optionally, the connection mode of the bearing bracket 4 and the base platform 1 includes, but is not limited to, one of welding, riveting and bolting; the bottoms of the at least two groups of guide posts 7 are fixedly connected with the bottom end of the bearing bracket 4, and optionally, the connection mode of the at least two groups of guide posts 7 and the bearing bracket 4 comprises one of welding, riveting and bolt fixing; the weight tray 8 is positioned between the at least two groups of guide posts 7, the weight tray 8 is in sliding connection with the at least two groups of guide posts 7, optionally, the weight tray 8 and the at least two groups of guide posts 7 are connected in an up-down sliding way by arranging sliding rails on the side walls of the guide posts 7 and sliding blocks on the side walls of the weight tray 8; optionally, at least two groups of through holes corresponding to the at least two groups of guide posts 7 are formed in the weight tray 8 and sleeved on the at least two groups of guide posts 7, so that up-and-down sliding connection in a shaft sleeve mode is realized; the weights 6 are arranged on the weight tray 8, and the weights 6 are provided with openings 601;
as shown in fig. 2, the first end of the first fixing rod 10 is fixedly connected with the weight tray 8 through the opening 601, and optionally, the connection mode of the first fixing rod 10 and the weight tray 8 includes, but is not limited to, one of welding, riveting, bolt fixing and fixing pin fixing; the second end of the first fixing rod 10 is in threaded connection with the first end of the first chuck 12;
as shown in fig. 2, the first end of the second fixing rod 11 is fixedly connected with the top end of the bearing bracket 4, and optionally, the connection mode of the second fixing rod 11 and the bearing bracket 4 includes, but is not limited to, one of welding, riveting, bolting and fixing pin fixing; the second end of the second fixing rod 11 is in threaded connection with the first end of the second chuck 13;
as shown in fig. 2, two ends of the test sample 14 are respectively connected with the second ends of the first chuck 12 and the second chuck 13, and optionally, the connection manner of the two ends of the test sample 14 and the first chuck 12 and the second chuck 13 includes, but is not limited to, one of welding, riveting, bolting, fixing pin fixing;
as shown in fig. 1, the test sample piece 14 is located in the accommodating space of the tube furnace 5, and the tube furnace 5 is fixedly connected with the bearing support 4, and optionally, the connection mode of the tube furnace 5 and the bearing support 4 includes, but is not limited to, one of welding, riveting, bolt fixing, fixing pin fixing and connecting piece fixing;
as shown in fig. 1 and 2, the ranging sensor 9 is located below the weight tray 8, and the ranging sensor 9 is fixedly connected with the bearing bracket 4 and is used for measuring the displacement of the test sample 14 in the vertical direction in real time;
the temperature control box 2 is electrically connected with the tube furnace 5, and the distance measuring sensor 9 and the temperature control box 2 are both in communication connection with the computer 3.
In the embodiment of the application, the temperature control box 2 is used for controlling the temperature rising rate and the accurate control of the temperature of the tube furnace 5; parameters such as temperature, creep quantity and the like are collected and recorded through the computer 3, and the equipment is controlled to be closed for heating when the set creep quantity is reached.
In the embodiment of the present application, the first chuck 12 and the second chuck 13 are all made of nickel-based alloy steel, so that the nickel-based alloy steel has good creep resistance under the high temperature condition, and the nickel-based alloy steel cannot fail under the continuous high temperature condition.
In this embodiment of the present application, optionally, the at least two sets of guide posts 7 are further provided with a limit sensor, and the limit sensor is used for preventing the weight tray 8 from colliding with the ranging sensor 9 when sliding downwards, so as to play a role in protecting the ranging sensor 9.
It should be noted that, the base platform 1 may be provided with a plurality of test mechanisms, a temperature control box 2 realizes multi-path temperature control, and a computer formulates a test method, automatically stores data and sends out a corresponding test report.
As an alternative embodiment, the tube furnace 5 is fastened to the load-bearing support 4 by at least four sets of connecting plates 15.
Optionally, the tube furnace 5 is welded or bolted to the load-bearing support 4 via at least four sets of connecting plates 15.
As an alternative embodiment, the side walls of the tube furnace 5 are fastened to the load-bearing support 4 by six sets of connection plates 15.
Alternatively, the tube furnace 5 is welded or bolted to the load-bearing support 4 via six sets of connecting plates 15.
As an alternative embodiment, both ends of the test piece 14 are respectively fastened to the second end of the first chuck 12 and the second end of the second chuck 13 by fixing pins 16.
In the present embodiment, the test piece 14 has pin holes at both ends that mate with the fixing pins 16.
As an alternative implementation, the test mechanisms are two groups, and the two groups of test mechanisms are parallel to each other.
As an alternative embodiment, the guide posts 7 are two groups, the guide posts 7 are symmetrically arranged about the central axis of the weight tray 8, and the two groups of guide posts 7 are perpendicular to the weight tray 8.
As an alternative embodiment, the center axis of the weight tray 8, the center axis of the first fixing rod 10, the center axis of the first clamping head 12, the center axis of the test sample 14, the center axis of the second clamping head 13, the center axis of the second fixing rod 11 and the center axis of the distance measuring sensor 9 are all coincident.
As an alternative embodiment, the load-bearing support 4 is C-shaped and the tube furnace 5 is cylindrical with a hollow interior.
For a better understanding of the present invention, the present invention will be further described with reference to the accompanying drawings and a specific example. It should be noted that the embodiments described in this specific embodiment are only some embodiments of the present invention, and do not limit the scope of protection of the present invention.
In this embodiment, in order to solve the problem of how to realize real-time collection of time, temperature and creep amount curves, and realize accurate temperature control to the temperature in the furnace, and multiple tube furnaces can be connected in parallel and controlled simultaneously, so as to improve the working efficiency, the working principle of the device using the high-temperature creep test device applied to the exhaust system described in any one of the embodiments includes the following steps:
step one, assembling a test sample 14 on a first chuck 12 and a second chuck 13 through a fixing pin 16;
step two, placing a proper number of weights 6 on a weight tray 8;
setting a heating target temperature and heating time or stopping test conditions after a certain creep amount is accumulated through a computer 3;
step four, starting the temperature control box 2, and receiving the creep amount of the test sample 14 acquired in real time by the ranging sensor 9 through the computer 3;
and step five, deriving test data and test reports by the computer 3.
In summary, the high-temperature creep test device applied to the exhaust system provided by the invention realizes real-time acquisition of time, temperature and creep curve, and realizes accurate temperature control on the temperature in the furnace, and can realize parallel connection of a plurality of tubular furnaces to control simultaneously, thereby improving the working efficiency. Specifically, the temperature control box and the computer are used for combined control, so that the temperature rising speed and the heat preservation precision in the tube furnace are well controlled, the detection means and the detection method can be customized, the relation of time, temperature and creep variables is collected and displayed in real time, after a certain condition is reached, the computer sends out an instruction to stop the test, and data are automatically saved and corresponding reports are provided.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (8)
1. The high-temperature creep test device applied to the exhaust system is characterized by comprising a base platform (1), a temperature control box (2), a computer (3) and at least two groups of test mechanisms, wherein the temperature control box (2), the computer (3) and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform (1);
the testing mechanism comprises a bearing bracket (4), a tube furnace (5), a plurality of weights (6), at least two groups of guide posts (7), a weight tray (8), a ranging sensor (9), a first fixing rod (10), a second fixing rod (11), a first clamping head (12), a second clamping head (13) and a test sample piece (14);
the bottom of the bearing bracket (4) is fixedly connected with the top surface of the base platform (1); the bottoms of at least two groups of guide posts (7) are fixedly connected with the bottom ends of the bearing brackets (4); the weight tray (8) is positioned between at least two groups of guide posts (7), and the weight tray (8) is in sliding connection with at least two groups of guide posts (7); the weights (6) are arranged on the weight tray (8), and the weights (6) are provided with openings (601);
the first end of the first fixing rod (10) penetrates through the opening (601) to be fixedly connected with the weight tray (8), and the second end of the first fixing rod (10) is in threaded connection with the first end of the first chuck (12);
the first end of the second fixing rod (11) is fixedly connected with the top end of the bearing bracket (4), and the second end of the second fixing rod (11) is in threaded connection with the first end of the second chuck (13);
two ends of the test sample piece (14) are respectively fixedly connected with the second end of the first chuck (12) and the second end of the second chuck (13);
the test sample piece (14) is positioned in the accommodating space of the tubular furnace (5), and the tubular furnace (5) is fixedly connected with the bearing bracket (4);
the distance measuring sensor (9) is positioned below the weight tray (8), and the distance measuring sensor (9) is fixedly connected with the bearing bracket (4);
the temperature control box (2) is electrically connected with the tube furnace (5), and the distance measuring sensor (9) and the temperature control box (2) are both in communication connection with the computer (3).
2. The high temperature creep test device applied to an exhaust system according to claim 1, wherein the tube furnace (5) is fixedly connected to the load bearing support (4) by at least four sets of connection plates (15).
3. The high temperature creep test device applied to an exhaust system according to claim 2, wherein the side wall of the tube furnace (5) is fixedly connected with the load bearing bracket (4) through six groups of connecting plates (15).
4. The high temperature creep test apparatus applied to an exhaust system according to claim 1, wherein both ends of the test sample (14) are respectively fastened to the second end of the first chuck (12) and the second end of the second chuck (13) by fixing pins (16).
5. The high temperature creep test apparatus according to claim 1, wherein the test mechanisms are two sets, and the test mechanisms of two sets are parallel to each other.
6. The high-temperature creep test device applied to an exhaust system according to claim 1, wherein the number of the guide posts (7) is two, the guide posts (7) are symmetrically arranged about the central axis of the weight tray (8), and the two guide posts (7) are perpendicular to the weight tray (8).
7. The high-temperature creep test device applied to an exhaust system according to claim 1, wherein the central axis of the weight tray (8), the central axis of the first fixing rod (10), the central axis of the first chuck (12), the central axis of the test sample (14), the central axis of the second chuck (13), the central axis of the second fixing rod (11) and the central axis of the ranging sensor (9) are all coincident.
8. The high temperature creep test apparatus applied to an exhaust system according to claim 1, wherein the load bearing bracket (4) is C-shaped and the tube furnace (5) is cylindrical with a hollow interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111118730.8A CN113820224B (en) | 2021-09-24 | 2021-09-24 | High-temperature creep test device applied to exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111118730.8A CN113820224B (en) | 2021-09-24 | 2021-09-24 | High-temperature creep test device applied to exhaust system |
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| CN113820224A CN113820224A (en) | 2021-12-21 |
| CN113820224B true CN113820224B (en) | 2024-03-08 |
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| CN114047079A (en) * | 2021-12-24 | 2022-02-15 | 西北工业大学 | Alloy structural component testing device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small punch creep test system |
| CN202533335U (en) * | 2011-12-30 | 2012-11-14 | 华东理工大学 | Multi-head creep testing device for miniature samples |
| CN109520857A (en) * | 2018-12-07 | 2019-03-26 | 华东理工大学 | High-throughput small sample creep and On Creep Crack Growth experimental rig and its application method |
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- 2021-09-24 CN CN202111118730.8A patent/CN113820224B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small punch creep test system |
| CN202533335U (en) * | 2011-12-30 | 2012-11-14 | 华东理工大学 | Multi-head creep testing device for miniature samples |
| CN109520857A (en) * | 2018-12-07 | 2019-03-26 | 华东理工大学 | High-throughput small sample creep and On Creep Crack Growth experimental rig and its application method |
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