CN102033025B - Rail fatigue tester - Google Patents
Rail fatigue tester Download PDFInfo
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- CN102033025B CN102033025B CN201010515082A CN201010515082A CN102033025B CN 102033025 B CN102033025 B CN 102033025B CN 201010515082 A CN201010515082 A CN 201010515082A CN 201010515082 A CN201010515082 A CN 201010515082A CN 102033025 B CN102033025 B CN 102033025B
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- push rod
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Abstract
The invention discloses a rail fatigue tester comprising a frame and a control device, wherein an upper press head, a lower supporting block, a pressure sensor and a variable load device are arranged in the frame; a supporting ball is arranged on the lower supporting block; the variable load device comprises a driving motor, a cam, a supporting rod and a drop limiting block of the supporting rod, wherein the driving motor is connected with the cam in a driving mode, one end of the supporting rod is arranged above the cam, the other end of the supporting rod is supported to the lower side of the lower supporting block, the pressure sensor is fixed at the upper end of the supporting rod, the frame is also provided with a cross rod, the drop limiting block of the supporting rod is arranged on the cross rod, and a lifting device is arranged between the drop limiting block of the supporting rod and the cross rod; and the pressure sensor and the lifting device are respectively and electrically connected with the control device. The rail fatigue tester has the characteristics of simple structure, stable motion, long service life, test accuracy and the like.
Description
Technical field
The present invention relates to a kind of rail test device, a kind of rail fatigue exerciser of more specifically saying so.
Background technology
The fatigue crack of rail can bring very big potential safety hazard to vehicle, therefore, fatigue crack initiation, the spread scenarios of rail is analyzed and researched, and has crucial social effect and economic implications.Torture test to rail is to guarantee one of important step of rail security.
Existing rail fatigue testing machine comprises corresponding frame, and the anchor clamps in the frame, load briquetting and load drive.During torture test, the load that is applied on the rail is the alternation load, with up to a million time be that radix is confirmed the rail fatigue limit, for the selection of sample, sample quantities, the loading scope, the record of test findings and method for sorting all have defined.Simultaneously, can combine optical microscope (OM), microhardness appearance, scanning electron microscope (SEM) that experimental result is analyzed and researched, study the rail fatigue performance under the moment of flexure effect.
At present; Rail fatigue testing machine both domestic and external; Its load drives hydraulic-driven and the two kinds of modes of Electromagnetic Drive of adopting mostly, have characteristics such as the time dependent loading frequency is high, test period is long because rail fatigue is tested, so hydraulic-driven is easy to make the rubber parts of hydropress to damage; Even torture test and the testing machine itself of also not accomplishing rail just need to repair, and instrument then need restart because of a variety of causes quits work to test in official hour.And there is baroque deficiency in Electromagnetic Drive, and test accuracy also awaits further raising.
Summary of the invention
To above-mentioned situation, the problem that quasi-solution of the present invention is determined provides a kind of simple in structure, rail fatigue exerciser that precision is high.
For addressing the above problem; The present invention has adopted following technical scheme: a kind of rail fatigue testing machine, and it comprises frame and control device, in said frame, is provided with seaming chuck, following jacking block, pressure transducer and time dependent loading device; Said jacking block down is provided with heading; Said time dependent loading device comprises drive motor, cam, push rod and push rod whereabouts limited block, and said drive motor is connected with cam drive, an end of said push rod above cam, the other end withstands on the down downside of jacking block; Said pressure transducer is fixed on the push rod upper end; Said frame also is provided with cross bar, and said push rod whereabouts limited block and is provided with jacking gear between push rod whereabouts limited block and the cross bar on cross bar; Said pressure transducer, jacking gear are electrically connected with control device respectively, the top immobile liquid press of said frame, and the output terminal and the seaming chuck of said hydropress are fixed, and said hydropress also is electrically connected with control device.
Said jacking gear can be: it comprises turbine, scroll bar and scroll bar drive motor; Said turbine screw thread is fixed on below the limited block of whereabouts; Said scroll bar is in transmission connection with turbine, scroll bar drive motor respectively, and said scroll bar drive motor is electrically connected with control device.Said jacking gear can also be a cylinder.
Adopted said structure, when rail fatigue is tested, rail has been placed down in two headings of jacking block, seaming chuck is pressed in the centre of rail.As the maximum pressure of setting the rail fatigue test is F
1, minimum pressure is F
2, then regulate the height of seaming chuck, when making cam maximum radius place withstand on push rod, the pressure that rail receives is F
1, and then regulate jacking gear, and confirm the height of push rod whereabouts limited block, the pressure that rail received when push rod can not be fallen is F
2, it is emphasized that here: the difference of cam maximum radius and least radius is Δ R, the pressure that rail receives is F
1The time and the pressure that receives of rail be F
2The time push rod displacement be Δ L, then must satisfy Δ R greater than Δ L.The rail fatigue testing machine cam of said structure rotates under the drive of drive motor, has realized the test of rail time dependent loading pressure.
Rail fatigue testing machine of the present invention adopts cam variable load structure, and hydropress is merely the height of regulating seaming chuck, the requirement of high-frequency time dependent loading, test period length in the time of satisfying the rail fatigue test.In addition, owing to pressure transducer, jacking gear, hydropress are electrically connected with control device.The maximum pressure that records when pressure transducer is less than F
1The time, through the program setting of control device, the control hydropress reduces the height of seaming chuck, satisfies the maximum pressure that pressure transducer records and equals F
1The minimum pressure that records when pressure transducer is less than F
2The time, through the program setting of control device, the height of control jacking gear rising push rod whereabouts limited block satisfies the minimum pressure that pressure transducer records and equals F
2In sum, rail fatigue testing machine of the present invention has characteristics such as simple in structure, stable, long service life, test accuracy.
Description of drawings
Fig. 1 is the structural representation of rail fatigue testing machine of the present invention;
Fig. 2 is the synoptic diagram of the side of Fig. 1;
Fig. 3 is the structural representation of jacking gear.
Among the figure: 1-frame, 2-control device, 3-seaming chuck, jacking block under the 4-, 5-pressure transducer, 6-drive motor; The 7-cam, 8-push rod, 9-push rod whereabouts limited block, 10-cross bar, 11-hydropress, 12-jacking gear; The 13-turbine, 14-scroll bar, 15-scroll bar drive motor, 16-rail, 17-heading.
Embodiment
Like Fig. 1, shown in Figure 2; Rail fatigue testing machine of the present invention, it comprises frame 1 and control device 2, in said frame 1, is provided with seaming chuck 3, following jacking block 4, pressure transducer 5 and time dependent loading device; Said jacking block 4 down is provided with heading 17, and the quantity of heading 17 is generally two.The bottom of rail fatigue test seaming chuck 3 is pressed in the centre of rail 16, and two headings 17 of said jacking block 4 down withstand on the bottom of rail 16 2 sides.The rail fatigue testing machine of said structure and prior art is similar, therefore, no longer launches.
The time dependent loading device of rail fatigue testing machine of the present invention comprises drive motor 6, cam 7, push rod 8 and push rod whereabouts limited block 9, and said drive motor 6 is in transmission connection with cam 7.Drive motor 6 can be selected according to test frequency, when not matching like the rotating speed of drive motor 6 and test frequency, can adopt speed regulator.
The lower end of said push rod 8 above cam 7, the upper end withstands on the down downside of jacking block 4; Can push up when rotating with drive motor 6 on the cam 7 like this and move push rod 8, still, in rail fatigue testing machine of the present invention; Push rod 8 is not to push up mutually with cam 7 all the time, if the maximum pressure that rail receives is F
1The time and the minimum pressure that receives of rail be F
2The time push rod displacement be Δ L, then only at cam maximum radius R
1With radius at R
1Arc surface between the-Δ L just pushes up with cam 7 mutually.
Said pressure transducer 5 is fixed on push rod 8 upper ends, and certain the present invention does not get rid of pressure transducer 5 yet and is fixed on the seaming chuck 3.
Said frame 1 also is provided with cross bar 10, and said push rod whereabouts limited block 9 and is provided with jacking gear 12 between push rod whereabouts limited block 9 and the cross bar 10 on cross bar 10; Said pressure transducer 5, jacking gear 12 are electrically connected with control device 2 respectively.
The top immobile liquid press 11 of said frame 1, the output terminal of said hydropress 11 and seaming chuck 3 are fixing, and said hydropress 11 also is electrically connected with control device 2.
The jacking gear of rail fatigue testing machine of the present invention can be used for reference mechanical industry structures more of the prior art.Comprise turbine 13, scroll bar 14 and scroll bar drive motor 15 like said jacking gear 12; Said turbine 13 is fixed on below the whereabouts limited block 9; Said scroll bar 14 is in transmission connection with turbine 13, scroll bar drive motor 15 respectively, and said scroll bar drive motor 15 is electrically connected (referring to Fig. 3) with control device 2.Certain said jacking gear 12 can also be a cylinder.
Claims (3)
1. rail fatigue testing machine; It comprises frame (1) and control device (2); In said frame (1), be provided with seaming chuck (3), following jacking block (4), pressure transducer (5) and time dependent loading device, said jacking block (4) down is provided with heading (17), it is characterized in that said time dependent loading device comprises drive motor (6), cam (7), push rod (8) and push rod whereabouts limited block (9); Said drive motor (6) is in transmission connection with cam (7); One end of said push rod (8) withstands on the downside of jacking block (4) down at cam (7) top, the other end, and said pressure transducer (5) is fixed on push rod (8) upper end, and said frame (1) also is provided with cross bar (10); Said push rod whereabouts limited block (9) and is provided with jacking gear (12) between push rod whereabouts limited block (9) and the cross bar (10) on cross bar (10); Said pressure transducer (5), jacking gear (12) are electrically connected with control device (2) respectively; The top immobile liquid press (11) of said frame (1), the output terminal of said hydropress (11) and seaming chuck (3) are fixing, and said hydropress (11) also is electrically connected with control device (2).
2. rail fatigue testing machine according to claim 1; It is characterized in that said jacking gear (12) comprises turbine (13), scroll bar (14) and scroll bar drive motor (15); Said turbine (13) screw thread is fixed on below the whereabouts limited block (9); Said scroll bar (14) is in transmission connection with turbine (13), scroll bar drive motor (15) respectively, and said scroll bar drive motor (15) is electrically connected with control device (2).
3. rail fatigue testing machine according to claim 1 is characterized in that said jacking gear (12) is a cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010515082A CN102033025B (en) | 2010-10-21 | 2010-10-21 | Rail fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010515082A CN102033025B (en) | 2010-10-21 | 2010-10-21 | Rail fatigue tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102033025A CN102033025A (en) | 2011-04-27 |
| CN102033025B true CN102033025B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010515082A Active CN102033025B (en) | 2010-10-21 | 2010-10-21 | Rail fatigue tester |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101474A (en) * | 2013-04-07 | 2014-10-15 | 上海理工大学 | Wheelchair falling strength testing device |
| CN103616152B (en) * | 2013-12-04 | 2015-08-26 | 大连理工大学 | A kind of steel rail impact test device and method |
| CN108693198B (en) * | 2018-03-08 | 2024-05-14 | 西南交通大学 | Clamping mechanism and synchrotron radiation in-situ imaging fatigue testing machine |
| CN109556961A (en) * | 2018-12-17 | 2019-04-02 | 武汉大学 | A kind of binary channels dropper fatigue tester |
| CN111721489B (en) * | 2020-05-20 | 2022-05-31 | 安徽浦进轨道装备有限公司 | Orbital antidetonation test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3443424A (en) * | 1967-01-16 | 1969-05-13 | Goodrich Co B F | Fatigue testing apparatus |
| CN2337547Y (en) * | 1998-06-15 | 1999-09-08 | 李江岩 | Fatigue tester |
| CN1884999A (en) * | 2006-06-23 | 2006-12-27 | 攀枝花钢铁(集团)公司 | Contact fatigue test method for rail |
| CN101614636A (en) * | 2009-06-16 | 2009-12-30 | 西南交通大学 | Clamp for rail fatigue experiment under the moment of flexure effect |
| CN201897554U (en) * | 2010-10-21 | 2011-07-13 | 浙江土工仪器制造有限公司 | Testing machine for rail fatigue |
-
2010
- 2010-10-21 CN CN201010515082A patent/CN102033025B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3443424A (en) * | 1967-01-16 | 1969-05-13 | Goodrich Co B F | Fatigue testing apparatus |
| CN2337547Y (en) * | 1998-06-15 | 1999-09-08 | 李江岩 | Fatigue tester |
| CN1884999A (en) * | 2006-06-23 | 2006-12-27 | 攀枝花钢铁(集团)公司 | Contact fatigue test method for rail |
| CN101614636A (en) * | 2009-06-16 | 2009-12-30 | 西南交通大学 | Clamp for rail fatigue experiment under the moment of flexure effect |
| CN201897554U (en) * | 2010-10-21 | 2011-07-13 | 浙江土工仪器制造有限公司 | Testing machine for rail fatigue |
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| Publication number | Publication date |
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| CN102033025A (en) | 2011-04-27 |
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