CN203132971U - Steel rail grinding experimental equipment - Google Patents
Steel rail grinding experimental equipment Download PDFInfo
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- CN203132971U CN203132971U CN 201320101429 CN201320101429U CN203132971U CN 203132971 U CN203132971 U CN 203132971U CN 201320101429 CN201320101429 CN 201320101429 CN 201320101429 U CN201320101429 U CN 201320101429U CN 203132971 U CN203132971 U CN 203132971U
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- rail
- grinding
- steel rail
- mounting disc
- grinding stone
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Abstract
The utility model provides steel rail grinding experimental equipment which is characterized in that a base is sequentially provided with a direct-current frequency conversion motor, a torque sensor, two coaxial rolling bearings and an air cylinder from left to right, wherein a shaft of the direct-current frequency conversion motor sequentially passes through a first shaft coupler, the torque sensor and a second shaft coupler so as to be connected with the left ends of two rolling bearing shafts; the right ends of the two rolling bearing shafts are fixedly connected with grinding stone mounting discs; right disc faces of the grinding stone mounting discs are provided with grinding stones through screws; a piston in the air cylinder is connected with the right end of a movable rod through a concentric spherical bearing; the left end of the movable rod is fixedly connected with a steel rail mounting disc; a left disc face of the steel rail mounting disc is provided with a steel rail test sample through a screw; the left part of the movable rod is fixedly connected with the upper end of a vertical rod; the lower end of the vertical rod is slidably connected with a transverse beam of the base; and the air cylinder is connected with an air pressure device. The experimental equipment disclosed by the utility model can conveniently simulate mutual effect behaviors between the grinding stone and the steel rail, so as to provide reliable experimental data to field grinding design and operation of a high-speed heavy-duty railway steel rail.
Description
Technical field
The utility model relates to a kind of steel rail grinding experimental facilities.
Background technology
Steel rail grinding is the process of removing the rail head surface metal by wheel grinding, originates from five sixties of last century.Because the steel rail grinding technology safeguards rail track and guarantee that transportation by railroad plays an important role, develop the maintenance technology that steel rail grinding has so far become a kind of routine of high-speed overload rail track in the world wide.Along with rapid economy development, China railways especially high-speed railway has entered Rapid development stage.In the worker in modern times is engaged in maintenance, carry out the maintenance of wide face at rail surface disease by steel rail grinding, become requisite link in the work of high-speed railway circuit maintenance.Adopt steel rail grinding technology preferably can effectively control the expansion of rail surface fatigue, the smooth-going degree that keeps the rail surface, avoid increasing the dynamic contact force of wheel track, the wheel-rail lateral force that minimizing causes during by the bogie curve negotiating, prevent that the serpentine locomotion of rectilinear orbit is to the impact of rail, reduce impact and abrasion between the wheel track, prolong the serviceable life of rail effectively.In addition, steel rail grinding also can guarantee security, stationarity and the comfortableness of train operation, directly reduces the financial cost of railway operation.
China is in the experience accumulation stage of high ferro operation and maintenance, and the high-speed railway grinding technology equally also is in the stage of fumbling, do not have comparatively ripe polishing standard to instruct existing high-speed railway how to carry out steel rail grinding, such as when polish, how to polish, problem such as choose reasonable grinding stone.At all wheel track surface in contact damages that occur in the operation process, lack deep mechanism understanding and the maintenance measures of effectively polishing.In addition, in the steel rail grinding process, have complicated tribology behavior between grinding stone and the rail, the surface quality of steel rail grinding, grinding efficiency, polishing amount etc. exist close relationship with the type of polishing parameter, grinding stone.
Practice shows, according to existing knowledge, also be difficult to calculate to assess only according to theoretical simulation the interaction behavior of grinding stone and rail in the steel rail grinding, in general need to carry out a large amount of polishing experimental studies, to obtain reliable experimental data in order to instruct the design of on-the-spot steel rail grinding.Though on-the-spot steel rail grinding experiment reliability is higher, its expense is big, longer duration, and is big to normal railway operation influence, also is difficult to control simultaneously the utilization condition.Simulating lab test can be controlled the utilization condition, also can be studied many complicated factors respectively, thereby obtain comparatively accurate, detailed experimental data.
The utility model content
The purpose of this utility model provides a kind of steel rail grinding experimental facilities, this experimental facilities can simulate the interaction behavior between the grinding stone and rail in the bruting process easily in the laboratory, can provide reliable experimental data with operation for the scene polishing design of high-speed overload railway track.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of steel rail grinding experimental facilities, and its formation is: DC frequency-changing motor, torque sensor, coaxial two rolling bearings and cylinder are installed on the base from left to right successively;
The DC frequency-changing motor reel is connected with the torque sensor left end by first shaft coupling, and the torque sensor right-hand member is connected the fixedly connected grinding stone mounting disc of the right-hand member of two rolling bearing axis by second shaft coupling with the left end of two rolling bearing axis; The right card of grinding stone mounting disc is equipped with grinding stone by screw;
The piston of cylinder interior connects the right-hand member of carriage release lever by radial ball bearing, the fixedly connected rail mounting disc of the left end of carriage release lever, and the left card of rail mounting disc is equipped with the rail sample by screw; The left part of carriage release lever is fixedlyed connected with the upper end of montant, and the lower end of montant is slidingly connected on the crossbeam, and crossbeam is fixed on the base;
The air intake opening of cylinder is connected with vent valve with the gas admittance valve of electromagnetic gas valve by draft tube, gas outlet respectively with exhausr port; The gas admittance valve of electromagnetic gas valve links to each other with air reducing valve, filtrator and pressurized air gas cylinder successively by tracheae.
The course of work of the present utility model and principle are:
Install and fix selected grinding stone sample in the grinding stone mounting disc by screw and in the rail mounting disc, installing and fixing good material and the identical rail sample of rail by screw.
Open the DC frequency-changing motor, the DC frequency-changing motor successively the axle by first shaft coupling, torque sensor, second shaft coupling, two rolling bearings, drive the grinding stone mounting disc and on grinding stone, evenly rotate by the setting rotating speed;
Simultaneously, open the switch valve on the pneumatic accumulator, pressurized air enters on the air reducing valve by filtrator, the adjusting handle of regulating on the air reducing valve arrives suitable force value, open the gas admittance valve on the electromagnetic gas valve then, close the air outlet valve on the electromagnetic gas valve, pressurized air is entered in the cylinder by the pressure of setting, be moved to the left and drive carriage release lever at pressurized air effect lower piston along cylinder body, the rail mounting disc and on the rail sample move right, the right lateral surface of rail sample is contacted with the grinding face generation, because pressurized air keeps constant pressure by air reducing valve, thereby make the constant pressure that contacts between rail sample and the grinding stone.
In the constant pressure contact, grinding stone evenly rotates to set rotating speed under the driving of DC frequency-changing motor; And owing to the left part of carriage release lever is fixedlyed connected with the upper end of montant, the lower end of montant is slidingly connected on the crossbeam of base, therefore carriage release lever and coupled rail mounting disc and rail sample can only laterally move, and can not rotate, thereby between grinding stone and rail sample constant pressure takes place, set the bruting process that relatively rotates to simulate rail of rotating speed.In the experimentation, gather the pivoting friction moment of torsion by torque sensor.
After experiment is finished, close the switch valve on DC frequency-changing motor and the pneumatic accumulator, open the vent valve of electromagnetic gas valve, entire equipment namely is in shutdown, dormant state.
The processing of data by experiment can be analyzed the interaction behavior of different operating mode metates and rail, as the variation relation of the load that applies (pressure), grinding stone rotating speed, polishing time and friction torque; And can further observe and the microcosmic test analysis the surface state of grinding stone and rail sample.
Compared with prior art, the beneficial effects of the utility model are:
One, adopt the mounting disc of DC frequency-changing direct motor drive grinding stone to rotate, this is convenient to the adjusting of grinding stone rotating speed and keeps constant rotating speed, its rotational speed regulation scope 0～4500r/min, pressurized air keeps constant pressure by air reducing valve, thereby make between rail sample and the grinding stone contact pressure, relative rotation speed is constant, can simulate the interaction behavior between the grinding stone and rail in the bruting process accurately, easily.
Two, by screw fixed installation grinding stone and rail sample, this makes that installation, dismounting, the replacing of grinding stone and rail sample are very convenient, and can guarantee that grinding stone contacts with the reliable of rail sample in the experimentation respectively for grinding stone mounting disc and rail mounting disc.
Three, the load that record and test accurately simultaneously applies in experimentation, rotating speed, friction torque and the polishing time of grinding stone, and can further observe and the microcosmic test analysis the surface state of grinding stone and rail sample.Thereby can analyze the rotating speed, friction torque, polishing time of grinding stone kind, the load that applies, grinding stone, the interaction relationship between the factors such as form after the polishing accurately, reliably, and then can provide reliable experimental data with operation for the scene polishing design of high-speed overload railway track.
Above-mentioned two coaxial rolling bearings are single row angular contact ball bearing, and two Mounting of Rolling Contact Bearing directions are opposite.
This can bear axially and the radially load synergy of both direction bearing, and load-carrying properties are good, can bear the big load of on-the-spot steel rail grinding requirement.
The rail sample of installing in the above-mentioned coaxial rail mounting disc is two, and two rail samples evenly distribute in the rail mounting disc.
Symmetry is installed two identical rail samples in the rail mounting disc, and this has guaranteed that grinding stone is subjected to even Axial Loads in experimentation, and experiment also can be analyzed two rail samples after finishing, and guarantees the reliability of experimental result.
The right flank of above-mentioned rail sample is provided with gauge hole, is welded with thermocouple sensor in this gauge hole.
The thermocouple sensor of welded and installed in the gauge hole on the noncontact face of rail sample, accurately the situation of change of rail temperature in the survey record polishing experimentation can be carried out further multianalysis to experimental result.
Below in conjunction with the drawings and specific embodiments the utility model is done to describe in further detail.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is friction torque and the time relation curve of measuring in the steel rail grinding experiment carrying out of the equipment with the utility model embodiment.
Embodiment
Embodiment
Fig. 1 illustrates, and a kind of embodiment of the present utility model is: a kind of steel rail grinding experimental facilities, and its formation is:
A kind of steel rail grinding experimental facilities, its formation is:
DC frequency-changing motor 2, torque sensor 4, coaxial two rolling bearings 6 and cylinder 8 are installed on the base 1 from left to right successively;
2 on DC frequency-changing motor is connected with torque sensor 4 left ends by first shaft coupling 3, and torque sensor 4 right-hand members are connected with the left end of 6 on two rolling bearings by second shaft coupling 5, the fixedly connected grinding stone mounting disc 7 of right-hand member that two rolling bearings are 6; The right card of grinding stone mounting disc 7 is equipped with grinding stone by screw;
The piston 9 of cylinder 8 inside passes through the right-hand member that radial ball bearing 23 connects carriage release levers 10, the fixedly connected rail mounting disc 18 of the left end of carriage release lever 10, and the left card of rail mounting disc 18 is equipped with rail sample 22 by screw; The left part of carriage release lever 10 is fixedlyed connected with the upper end of montant 11, and the lower end of montant 11 is slidingly connected on the crossbeam 25, and crossbeam 25 is fixed on the base 1;
The air intake opening 8a of cylinder 8 is connected with vent valve with the gas admittance valve of electromagnetic gas valve 13 by draft tube 12a, gas outlet 12b respectively with exhausr port 8b; The gas admittance valve of electromagnetic gas valve 13 links to each other with air reducing valve 14, filtrator 15 and pressurized air gas cylinder 17 successively by tracheae.
Two coaxial rolling bearings 6 of this example are single row angular contact ball bearing, and the installation direction of two rolling bearings 6 is opposite.
The rail sample of installing in the coaxial rail mounting disc 18 of this example 22 is two, and two rail samples 22 evenly distribute in rail mounting disc 18.
The right flank of the rail sample 22 that this is routine is provided with gauge hole, is welded with thermocouple sensor in this gauge hole.
The steel rail grinding experiment
Adopt this routine equipment to carry out the steel rail grinding experiment, its result is as follows:
Grinding stone 21 specifically be of a size of 150mm * 40mm * 55mm (external diameter * internal diameter * thickness), be evenly distributed with threaded hole at grinding stone noncontact face (left-hand face) along circumference, by this threaded hole and screw grinding stone 21 is fixedly mounted in the grinding stone mounting disc 7; Rail sample 22 specifically be of a size of 80mm * 30mm * 30mm (length * wide * height), two rail samples 22 evenly are installed in the rail mounting disc 18 by screw.
Friction torque and the time relation curve of Fig. 2 for measuring in the steel rail grinding experiment adopting this routine equipment to carry out; As seen from Figure 2, the friction torque of measuring in this experimentation is basicly stable, and its mean value is about 6.16N.m.Micro-analysis has been carried out to rail sample polishing surface damage in the experiment back, the polishing surface microscopic topographic figure of the rail sample after the experiment shows: the surfaceness of rail sample is about 15.6 μ m, its surface has tangible ditch dug with a plow effect vestige, and this mainly is that skimming wear between rail and the grinding stone causes.
Claims (4)
1. steel rail grinding experimental facilities, its formation is:
DC frequency-changing motor (2), torque sensor (4), coaxial two rolling bearings (6) and cylinder (8) are installed on the base (1) from left to right successively;
DC frequency-changing motor (2) axle is connected with torque sensor (4) left end by first shaft coupling (3), torque sensor (4) right-hand member is connected by the left end of second shaft coupling (5) with two rolling bearings (6) axle, the fixedly connected grinding stone mounting disc of right-hand member (7) of two rolling bearings (6) axle; The right card of grinding stone mounting disc (7) is equipped with grinding stone (21) by screw;
The inner piston (9) of cylinder (8) passes through the right-hand member that radial ball bearing (23) connects carriage release lever (10), the fixedly connected rail mounting disc of the left end of carriage release lever (10) (18), and the left card of rail mounting disc (18) is equipped with rail sample (22) by screw; The left part of carriage release lever (10) is fixedlyed connected with the upper end of montant (11), and the lower end of montant (11) is slidingly connected on the crossbeam (25), and crossbeam (25) is fixed on the base (1);
The air intake opening (8a) of cylinder (8) is connected with vent valve with the gas admittance valve of electromagnetic gas valve (13) by draft tube (12a), gas outlet (12b) respectively with exhausr port (8b); The gas admittance valve of electromagnetic gas valve (13) links to each other with air reducing valve (14), filtrator (15) and pressurized air gas cylinder (17) successively by tracheae.
2. a kind of steel rail grinding experimental facilities according to claim 1, it is characterized in that: described coaxial two rolling bearings (6) are single row angular contact ball bearing, and the installation direction of two rolling bearings (6) is opposite.
3. a kind of steel rail grinding experimental facilities according to claim 1 is characterized in that: it is two that the rail sample of installing (22) is gone up in described rail mounting disc (18), and two rail samples (22) evenly distribute in rail mounting disc (18).
4. a kind of steel rail grinding experimental facilities according to claim 1, it is characterized in that: the right flank of described rail sample (22) is provided with gauge hole, is welded with thermocouple sensor in this gauge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101429 CN203132971U (en) | 2013-03-06 | 2013-03-06 | Steel rail grinding experimental equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101429 CN203132971U (en) | 2013-03-06 | 2013-03-06 | Steel rail grinding experimental equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203132971U true CN203132971U (en) | 2013-08-14 |
Family
ID=48940943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320101429 Withdrawn - After Issue CN203132971U (en) | 2013-03-06 | 2013-03-06 | Steel rail grinding experimental equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203132971U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196822A (en) * | 2013-03-06 | 2013-07-10 | 西南交通大学 | Steel rail polishing experimental device |
| CN109596372A (en) * | 2018-12-17 | 2019-04-09 | 西南交通大学 | A kind of singles' bistrique steel rail grinding experimental provision |
-
2013
- 2013-03-06 CN CN 201320101429 patent/CN203132971U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196822A (en) * | 2013-03-06 | 2013-07-10 | 西南交通大学 | Steel rail polishing experimental device |
| CN103196822B (en) * | 2013-03-06 | 2014-12-10 | 西南交通大学 | Steel rail polishing experimental device |
| CN109596372A (en) * | 2018-12-17 | 2019-04-09 | 西南交通大学 | A kind of singles' bistrique steel rail grinding experimental provision |
| CN109596372B (en) * | 2018-12-17 | 2023-09-22 | 西南交通大学 | Single grinding head steel rail grinding experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |