CN102692354B - High-speed intermittently-loaded circular block contact erosion tester - Google Patents
High-speed intermittently-loaded circular block contact erosion tester Download PDFInfo
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- CN102692354B CN102692354B CN201210190919.2A CN201210190919A CN102692354B CN 102692354 B CN102692354 B CN 102692354B CN 201210190919 A CN201210190919 A CN 201210190919A CN 102692354 B CN102692354 B CN 102692354B
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Abstract
The invention discloses a high-speed intermittently-loaded circular block contact erosion tester, which is characterized in that a mechanical main shaft driven by a motor is horizontally arranged on a worktable, a test ring is fixedly installed at the shaft end of the mechanical main shaft, and a test piece block is located right above the test piece ring and installed on a horizontally-arranged loading rod through a clamper. One end of the loading rod is hinged on a loading support while the other end of the loading rod is provided with a spring loading unit. The spring loading unit is provided with a loading support rod with a loading bolt, and the loading support rod is vertically arranged at the end part of the loading rod. The loading bolt leans against the loading rod. The bottom of the loading support rod is hinged with a vertical loading guide rod. A load testing sensor is connected with the lower end of the vertical loading guide rod. A spring base is arranged above the load testing sensor. The lower of the loading spring leans against the spring base while the upper end of the loading spring leans against the vertical loading guide support. The vertical loading guide support is installed on the worktable. The tester is used for simulating a contact erosion phenomenon of a high-speed shaft.
Description
Technical field
The present invention relates to a kind of high speed, can interval load ring piece contact ablation test machine, be applicable to simulate the contact ablation phenomen of high speed shaft, formation and the Evolution of research high speed shaft surface modification layer.
Background technology
Large centrifugal compressor rotary speed scope: 3000-48000 rev/min.Under high rotating speed, in bearing district, owing to supplying shortage of oil, watt contact area of maybe can inclining is too small, causes local temperature to raise rapidly, axle surface discolouration; Vibration exceeding the standard when rotor operation, causes axle and sealing scraping; Or because Axial Force Calculating is inaccurate, thereby make stator, as dividing plate produces distortion, because the gap between rotor, stator is 2-3mm, and block board thickness is 100mm left and right, in the time that the pressure reduction of high-low pressure part reaches tens kilograms, will make the dividing plate of cantilever work produce distortion, and then produce scraping with rotor.Can make rotor surface variable color once produce scraping, even bending, need to repair it, serious scraps.Therefore simulate the contact ablation phenomen of high speed shaft, formation and the Evolution of research high speed shaft surface modification layer, to axle be rotor repair manufacture again significant.
At present, the wearing quality of research axial workpiece, be mainly by test specimen ring and test specimen piece to grinding, the abrasion condition of observation analysis friction surface.In prior art, test specimen ring and test specimen piece are generally taked Continuous Contact friction, and rotating speed is not high, and all, below 3000r/min, friction surface is a generating material wearing and tearing substantially, is difficult to undergo phase transition.But the rotating speed of now a lot of axles is all up to 10000r/min, even higher, due to reasons such as insufficient lubrications, swipes with stationary part, produce moment high temperature, cause the phase transformation of superficial layer, anti-wear performance is produced a very large impact; Can also there is not relevant report by interval load ring piece contact ablation test machine up to now, at a high speed.
Summary of the invention
The present invention is to be the simulation contact ablation of high speed shaft and formation and the Evolution of surface modification layer, provide a kind of high speed, can interval load ring piece contact ablation test machine, in order to simulate the contact ablation of high speed shaft and formation and the Evolution of surface modification layer thereof, for it is repaired and manufactures foundation is provided again
The present invention is that technical solution problem adopts following scheme:
The present invention at a high speed, the design feature of ring piece contact ablation test machine that can interval load is: on worktable, be and be horizontally disposed with by main motor-driven mechanical main shaft, test specimen ring is fixedly mounted on the axle head of mechanical main shaft, test specimen piece is positioned at directly over test specimen ring, be contained in and be on horizontally disposed load bar by clamper, load bar one end is hinged on and loads on bearing, the other end arranges spring loading unit, described spring loading unit is to be the loading support bar that is longitudinally provided with loading bolt in the end of load bar, loading bolt withstands on load bar, load support bar hinged with longitudinal loading guide pole in bottom, lower end at described longitudinal loading guide pole connects load determination sensor, load determination sensor top is spring pedestal, loading spring lower end withstands on spring pedestal, upper end withstands on longitudinal loading guide type shoe, longitudinally loading guide type shoe is arranged on worktable.
The present invention is at a high speed, the design feature of ring piece contact ablation test machine that can interval load is also:
Loading bolt position place, be positioned at described load bar below hand lever unloading unit is set, the middle part of the discharge arm of hand lever unloading unit is articulated with on the discharge arm bearing being fixed on worktable, and the afterbody of discharge arm is fixedly installed the unloading handle that can drive discharge arm to press down at afterbody.
Manually unloading between lever and test specimen piece, Self-tipping unit is set, described Self-tipping unit is an eccentric mechanism, eccentric wheel revolves and turns around, and by load bar jack-up once, realizes once unloading, by adjusting eccentric adjustment of rotational speed unloading frequency.
Described main motor adopts frequency-conversion and speed-regulation motor, the gear train being made up of large multi-wedge belt pulley, PJ type polywedge bet and little multi-wedge belt pulley is set between main motor and mechanical main shaft, described large multi-wedge belt pulley is fixedly installed on the output shaft of main motor, and described little multi-wedge belt pulley is fixedly installed on the axle head of mechanical main shaft.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention's scraping that contacts with test specimen piece by test specimen ring, simulation the contact ablation of high speed rotating shaft and formation and the Evolution of surface modification layer, to axle be rotor repair manufacture again significant.
2, the present invention arranges manual unloading unit or Self-tipping unit, can realize the intermittent contact scraping of test specimen ring piece, simulates better large-scale compression arbor and bearing, sealing or stationary part the intermittent ablation that contacts the axle surface that causes of swiping occurs.
3, in the present invention, main motor adopts frequency-conversion and speed-regulation motor, and rotating speed is adjustable continuously, can realize the ablation situation of studying test specimen surface under different rotating speeds.
4, the present invention adopts the gear train being made up of multi-wedge belt pulley and PJ type polywedge bet, can increase substantially rotating speed, approaches the actual condition of simulation.
5, the present invention, by further set temperature and rotation-speed measuring device, can realize the real-time output of mechanical main shaft rotating speed and scratch-off surface temperature.
Brief description of the drawings
Fig. 1 is testing machine entirety assembling front view of the present invention;
Fig. 2 is testing machine entirety assembled rear view of the present invention;
Fig. 3 is testing machine loading unit structural drawing of the present invention;
Number in the figure: 1 motor support plate; 2 studdles; 3 main motors; 4 large multi-wedge belt pulleys; 5 is PJ type polywedge bet; 6 little multi-wedge belt pulleys; 7 mechanical main shafts; 8 main shaft upper support seats; 9 main shaft lower support seats; 10 load bearing; 11 load bars; 12 test specimen piece holding frames; 13 test specimen rings; 14 driven member holding frames; 15 eccentric wheels; 16 load support bar; 17 load guide type shoe; 18 loading bolts; 19 lock-screws; 20 bunchers; 21 discharge arms; 22 discharge arm supports; 23 discharge arm positioning seats; 24 longitudinally load guide pole; 25 loading springs; 26 spring pedestals; 27 load determination sensors; 28 test specimen pieces; 29 roller followers.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 the present embodiment high speed, the version of ring piece contact ablation test machine that can interval load are:
On worktable, be and be horizontally disposed with the mechanical main shaft 7 being driven by main motor 3, test specimen ring 13 is fixedly mounted on the axle head of mechanical main shaft 7, test specimen piece 28 is positioned at directly over test specimen ring 13, be contained in and be on horizontally disposed load bar 11 by clamper 12, load bar 11 one end are hinged on and load on bearing 10, the other end arranges spring loading unit, spring loading unit is to be the loading support bar 16 that is longitudinally provided with loading bolt 18 in the end of load bar 11, loading bolt 18 withstands on load bar 11, loading bolt 18 is locked by lock-screw 19, load support bar 16 hinged with longitudinal loading guide pole 24 in bottom, the lower end that longitudinally loads guide pole 24 connects load determination sensor 27, load determination sensor 27 tops are spring pedestals 26, loading spring 25 lower ends withstand on spring pedestal 26, upper end withstands on longitudinal loading guide type shoe 17, longitudinally loading guide type shoe 17 is arranged in the counter sink on worktable.
In concrete enforcement, corresponding structure setting also comprises:
Main motor 3 adopts frequency-conversion and speed-regulation motor, the gear train being made up of large multi-wedge belt pulley 4, PJ type polywedge bet 5 and little multi-wedge belt pulley 6 is set between main motor 3 and mechanical main shaft 7, large multi-wedge belt pulley 4 is fixedly installed on the output shaft of main motor 3, and little multi-wedge belt pulley 6 is fixedly installed on the axle head of mechanical main shaft 7.
Below loading bolt 18 places, load bar 11, perpendicular to load bar 11, hand lever unloading unit is set, the middle part of the discharge arm 21 of hand lever unloading unit is articulated with on the discharge arm bearing 22 being fixed on worktable, and the afterbody of discharge arm 21 is fixedly installed the unloading handle that can drive discharge arm 21 to press down at afterbody.
Manually unloading between lever 21 and test specimen piece 28, be also provided with Self-tipping unit, Self-tipping unit is an eccentric mechanism, is driven by buncher 20, roller follower 29 is arranged on the below of load bar 11 by driven member holding frame 14.The wheel 15 that believes one side only revolves and turns around, and by load bar 11 jack-up once, realizes once unloading, by adjusting the adjustment of rotational speed unloading frequency of eccentric wheel 15.
In addition, as depicted in figs. 1 and 2, main motor 3 is arranged on motor support plate 1, and motor support plate 1 supports by four studdles 2; Mechanical main shaft 7 is to be fixed on worktable by separable main shaft upper support seat 8 and main shaft lower support seat 9.
The course of work:
Main motor 3 passes through the transmission of one-level polywedge bet, driving mechanical main shaft 7 High Rotation Speeds, and test specimen ring 13 and test specimen piece 28 contact.By twisting loading bolt 18, load support bar 16 and drive and longitudinally load guide pole 24 and move up, spring 25 is compressed, load is vertically applied on load bar 11, by lever principle, so by load applying on test specimen ring 13 and test specimen piece 28.
Manually when unloading, discharge arm 21 is pressed down with hand, load bar 11, by jack-up, is realized unloading; When Self-tipping, buncher 20 is with movable eccentric wheel 15 to rotate, and by regular roller follower 29 jack-up, realizes unloading.
Manually and Self-tipping, make that test specimen ring 13 and test specimen piece 28 are intermittent under relatively high rotating speed contact scraping, generation moment high temperature, causes the 28 ablated surface variable colors of test specimen piece.By the variation of research test specimen piece 28 surfacings, simulation large-scale compression arbor and bearing, sealing or stationary part are swiped, and cause the ablation on axle surface, study formation and the Evolution of its denatured layer.
Claims (2)
1. a high speed, ring piece contact ablation test machine that can interval load, it is characterized in that: on worktable, be and be horizontally disposed with the mechanical main shaft (7) being driven by main motor (3), test specimen ring (13) is fixedly mounted on the axle head of mechanical main shaft (7), test specimen piece (28) is positioned at directly over test specimen ring (13), be contained in and be on horizontally disposed load bar (11) by clamper (12), load bar (11) one end is hinged on and loads on bearing (10), the other end arranges spring loading unit, described spring loading unit is to be the loading support bar (16) that is longitudinally provided with loading bolt (18) in the end of load bar (11), loading bolt (18) withstands on load bar (11), load support bar (16) hinged with longitudinal loading guide pole (24) in bottom, lower end at described longitudinal loading guide pole (24) connects load determination sensor (27), load determination sensor (27) top is spring pedestal (26), loading spring (25) lower end withstands on spring pedestal (26), upper end withstands on longitudinal loading guide type shoe (17), longitudinally loading guide type shoe (17) is arranged on worktable,
At loading bolt (18) position place, the below that is positioned at described load bar (11) arranges hand lever unloading unit, it is upper that the middle part of the discharge arm (21) of hand lever unloading unit is articulated with the discharge arm bearing (22) being fixed on worktable, and the afterbody of discharge arm (21) is fixedly installed the unloading handle that can drive discharge arm (21) to press down at afterbody;
Between described discharge arm (21) and test specimen piece (28), Self-tipping unit is set, described Self-tipping unit is an eccentric mechanism, eccentric wheel (15) revolves and turns around, by load bar (11) jack-up once, realize once unloading, by adjusting the adjustment of rotational speed unloading frequency of eccentric wheel (15).
High speed according to claim 1, can interval load ring piece contact ablation test machine, it is characterized in that: described main motor (3) adopts frequency-conversion and speed-regulation motor, the gear train being made up of large multi-wedge belt pulley (4), PJ type polywedge bet (5) and little multi-wedge belt pulley (6) is set between main motor (3) and mechanical main shaft (7), described large multi-wedge belt pulley (4) is fixedly installed on the output shaft of main motor (3), and described little multi-wedge belt pulley (6) is fixedly installed on the axle head of mechanical main shaft (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210190919.2A CN102692354B (en) | 2012-06-11 | 2012-06-11 | High-speed intermittently-loaded circular block contact erosion tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210190919.2A CN102692354B (en) | 2012-06-11 | 2012-06-11 | High-speed intermittently-loaded circular block contact erosion tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102692354A CN102692354A (en) | 2012-09-26 |
| CN102692354B true CN102692354B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210190919.2A Expired - Fee Related CN102692354B (en) | 2012-06-11 | 2012-06-11 | High-speed intermittently-loaded circular block contact erosion tester |
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| Country | Link |
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| CN (1) | CN102692354B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604710B (en) * | 2013-06-23 | 2016-03-23 | 合肥工业大学 | A kind of desk-top ring block friction and wear tester |
| CN111638045B (en) * | 2020-04-26 | 2022-12-27 | 武汉船用机械有限责任公司 | Device for friction test |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975709A (en) * | 2010-10-29 | 2011-02-16 | 华南理工大学 | Bolt loading ring-block type corrosive wear testing machine |
| CN102288502A (en) * | 2011-05-13 | 2011-12-21 | 中国矿业大学 | Variable-load cylinder-sleeve piston-ring frictional wear testing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07134086A (en) * | 1993-11-11 | 1995-05-23 | Mitsubishi Heavy Ind Ltd | Apparatus for monitoring repeated stress corrosion cracking |
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2012
- 2012-06-11 CN CN201210190919.2A patent/CN102692354B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975709A (en) * | 2010-10-29 | 2011-02-16 | 华南理工大学 | Bolt loading ring-block type corrosive wear testing machine |
| CN102288502A (en) * | 2011-05-13 | 2011-12-21 | 中国矿业大学 | Variable-load cylinder-sleeve piston-ring frictional wear testing device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平7-134086A 1995.05.23 |
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| CN102692354A (en) | 2012-09-26 |
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Granted publication date: 20141008 Termination date: 20210611 |