Rail lubricating grease measuring scale and test method for lubricating and wear-reducing effect

Abstract

The application discloses a kind of steel rail lubricating grease measuring scale and the test method of lubricating wear-reducing effect, including template body, telescopic pull rod and support block, template body is installed in one end of pull rod, support block is installed in the other end of pull rod;Template body includes horizontal plane, quarter circle arc surface and vertical plane connected in turn, arc surface is tangent with horizontal plane and vertical plane, horizontal plane is used to be consistent with the rail top surface of second steel rail coated with lubricating grease;Template body includes scale surface, scale surface is connected with horizontal plane, arc surface and vertical plane, angle scale line and height scale line for reading the coating angle and coating height of lubricating grease are provided on scale surface.The steel rail lubricating grease measuring scale and the test method of lubricating wear-reducing effect provided by the application quantifies the coating position of lubricating grease, and proposes the test method of lubricating wear-reducing effect, so as to adjust the coating position of lubricating grease in time, reduce the wear of steel rail inner side.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of railway engineering surveying and maintenance and repair, and more particularly to a rail lubricating grease measuring scale and a lubrication and wear reduction effect testing method. BACKGROUND

[0002] Rail lubrication technology can reduce the friction coefficient of the wheel-rail contact interface and slow down rail wear and fatigue damage. Using rail side lubrication can achieve surface interface lubrication between the rail side, reduce the friction coefficient from more than 0.5 to less than 0.2, significantly reduce the shear contact stress of the contact interface, and effectively reduce wear, damage and noise. However, the use of lubricating grease may also have some adverse effects. For example, for rails that are more severely damaged by rolling contact fatigue, the grease may be squeezed into the surface fatigue crack gap and cause oil wedge effect, accelerating the expansion of the fatigue crack. When the grease further invades the rail top surface under the wheel-rail pressure, it will significantly reduce the traction and braking force of the train, causing the train to slip or brake failure.

[0003] The main problems existing at present are: (1) It is difficult to observe and determine whether there is lubricating grease on the rail surface, and it is not easy to master the lubricating coating condition of the entire curve. The traditional naked eye observation and finger wiping method is difficult to determine whether the oil film exists, so that the adjustment of the output amount of lubricating grease lacks basis. (2) The specific position of the lubricating grease coating is difficult to quantify. If the grease distribution is on the top, it will enter the rail top position, which will affect the traction and braking of the train. If it enters the upper part of the gage corner where rolling contact fatigue cracks are prone to occur, it is easy to cause oil wedge effect and lead to rapid expansion of the crack. Conversely, if the lubricating oil belt position is too low and deviates from the most serious wear position, it cannot play the expected wear reduction effect and will also cause waste. (3) There is a blank or no standard for the test method of the wear reduction effect of rail side lubrication. At present, the friction coefficient of the rail surface after the lubricating grease is coated is rarely tested on site. As for the change of rail wear after lubrication, a portable wear gauge is usually used for measurement, which has poor positioning ability and the measurement error is often more than 0.2mm. The above test position and method are not standardized, which can easily make the test data contradictory and difficult to reflect the true situation.

[0004] Therefore, it is necessary to solve the above technical problems. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a rail lubricating grease measuring scale and a lubrication and wear reduction effect testing method, so as to quantify the coating position of the lubricating grease and provide a lubrication and wear reduction effect testing method, so as to timely adjust the coating position of the lubricating grease and reduce the wear of the inner side of the rail.

[0006] In order to achieve the above purpose, the present application provides a steel rail lubricating grease measuring scale, which comprises a template body, an extendable pull rod and a supporting block, wherein the template body is detachably installed at one end of the pull rod, and the supporting block is installed at the other end of the pull rod; the supporting block comprises a fitting surface for fitting with the top surface of a first steel rail; the template body comprises a horizontal surface, a quarter circular surface and a vertical surface connected in sequence, the circular surface is tangentially arranged with the horizontal surface and the vertical surface, the horizontal surface is used for fitting with the top surface of a second steel rail coated with lubricating grease, the vertical surface is used for fitting with the inner side surface of the second steel rail, and the horizontal surface is located at the same horizontal plane as the fitting surface; the template body comprises a scale surface connected with the horizontal surface, the circular surface and the vertical surface, the scale surface is provided with an angle scale line and a height scale line for reading the coating angle and coating height of the lubricating grease, the angle scale line is arranged on the circular arc line where the circular surface and the scale surface intersect, the 0 angle line is arranged on the center line of the arc of the circular arc line, and the 0 height scale line is flush with the horizontal surface.

[0007] Optionally, the angle scale line is distributed along the circumference of the circular arc line, the height scale line is arranged in a first segment and a second segment, the 0 height scale line is arranged on the first segment, and the second segment is located on the edge line where the vertical surface and the scale surface intersect.

[0008] Optionally, the pull rod is provided with a locking button, the pull rod is extendable when the locking button is loosened, and the length of the pull rod is fixed when the locking button is tightened.

[0009] Optionally, the steel rail lubricating grease measuring scale further comprises a template support installed on the template body away from the scale surface, wherein the template support comprises a mounting surface located at the same horizontal plane as the fitting surface.

[0010] Optionally, the template body is detachably installed on the pull rod through a screw.

[0011] Optionally, the template body, the pull rod, the supporting block and the template support are all made of insulating material.

[0012] Based on the same inventive concept, the application also provides a test method for lubrication and wear reduction effect, which uses the aforementioned rail lubricating grease measuring scale to test the lubricating grease coated on the inner side of the rail, and comprises the following steps: step one, spraying the water-based colorant on the inner side of the rail to be tested, when the colorant on the inner side of the rail is in the form of scattered water droplets, it is judged that the inner side of the rail is coated with lubricating grease, when the inner side of the rail is in the form of water flow or water film, it is judged that the inner side of the rail is not coated with lubricating grease; step two, when the inner side of the rail is coated with lubricating grease, after spraying the water-based colorant, the lubricating grease and other positions form a natural stratification, the angle and / or height value of the lubricating grease are read by using the rail lubricating grease measuring scale; step three, the water-based colorant is wiped clean, after the lubricating grease is stable after more than 30 trains, the friction coefficient tester and the rail lubricating grease measuring scale are used to test the friction coefficient of different positions of the inner side of the rail according to the angle and / or height value of the lubricating grease measured in step two; step four, the rail profile instrument is used to periodically measure the shape of the rail head of the rail to be tested; step five, the standard rail profile, the rail profile without lubrication and the rail profile measured in step four are compared and analyzed to obtain the wear change of the inner side of the rail.

[0013] Optionally, in step three, after each measurement of the friction coefficient of different positions of the inner side of the rail is completed, the test wheel of the friction coefficient tester is cleaned with organic solvent and cotton.

[0014] Optionally, the color of the water-based colorant is red or orange yellow.

[0015] The rail lubricating grease measuring scale and the test method for lubrication and wear reduction effect provided by the application, the rail lubricating grease measuring scale comprises a template body, an extendable pull rod and a support block, first, the inner side of the second rail is coated with lubricating grease, then the fitting surface on the support block is fitted on the top surface of the first rail, the horizontal surface on the template body is fitted on the top surface of the second rail, and the vertical surface is fitted on the inner side of the second rail, finally, the angle value and the height value of the lubricating grease are read according to the angle scale line and the height scale line, which quantifies the coating position of the lubricating grease, the test method for lubrication and wear reduction effect provided by the application improves the operation convenience of timely adjusting the coating position of the lubricating grease, and reduces the wear of the inner side of the rail. BRIEF DESCRIPTION OF DRAWINGS

[0016] The preferred embodiments of the application will be described in detail below with the help of the accompanying drawings, which will help to understand the purposes and advantages of the application, in which:

[0017] Figure 1 It is an embodiment of the rail lubricating grease measuring scale of the application.

[0018] Figure 2 Structure diagram of a rail lubricating grease measuring scale according to another embodiment of the present application;

[0019] Figure 3 Structure diagram of a rail lubricating grease measuring scale according to another embodiment of the present application;

[0020] Figure 4 Structure diagram of a rail lubricating grease measuring scale according to another embodiment of the present application;

[0021] Figure 5 Flow chart of a test method for lubricating and wear-reducing effect according to an embodiment of the present application.

[0022] Explanation of reference numerals:

[0023] 1: template body; 2: pull rod; 3: support block; 4: horizontal surface; 5: circular surface; 6: vertical surface; 7: first rail; 8: second rail; 9: scale surface; 10: angle scale line; 11: height scale line; 12: first section; 13: second section; 14: locking button; 15: template support; 16: screw. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to embodiments. Identical components are denoted by identical reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0025] As Figures 1 to 4As shown in the figure, the rail lubricating grease measuring ruler provided by the present application comprises a template body 1, a telescopic pull rod 2 and a supporting block 3, wherein: the template body 1 is detachably installed at one end of the pull rod 2, and the supporting block 3 is installed at the other end of the pull rod 2; the supporting block 3 comprises a fitting surface, which is used to fit the top surface of the first rail 7; the template body 1 comprises a horizontal surface 4, a quarter circular arc surface 5 and a vertical surface 6 connected in sequence, the circular arc surface 5 is tangentially arranged with the horizontal surface 4 and the vertical surface 6, the horizontal surface 4 is used to fit the top surface of the second rail 8 coated with lubricating grease, the vertical surface 6 is used to fit the inner side surface of the second rail 8, and the horizontal surface 4 and the fitting surface are located at the same horizontal surface 4; the template body 1 comprises a scale surface 9, which is connected with the horizontal surface 4, the circular arc surface 5 and the vertical surface 6, the scale surface 9 is provided with an angle scale line 10 and a height scale line 11 for reading the coating angle and the coating height of the lubricating grease, the angle scale line 10 is arranged on the circular arc line where the circular arc surface 5 and the scale surface 9 intersect, and the 0 angle line is arranged on the center line of the arc of the circular arc line, and the 0 height scale line 11 is flush with the horizontal surface 4.

[0026] It should be noted that the radius of the quarter circular arc surface 5 can be 5mm-20mm.

[0027] The rail lubricating grease measuring ruler provided by the present application comprises a template body 1, a telescopic pull rod 2 and a supporting block 3, first, the inner side surface of the second rail 8 is coated with lubricating grease; then, the fitting surface on the supporting block 3 is fitted on the top surface of the first rail 7, the horizontal surface 4 on the template body 1 is fitted on the top surface of the second rail 8, and the vertical surface 6 is fitted on the inner side surface of the second rail 8; finally, the angle value and the height value of the lubricating grease are read according to the angle scale line 10 and the height scale line 11, which quantifies the coating position of the lubricating grease, improves the operation convenience of timely adjusting the coating position of the lubricating grease, and reduces the wear of the inner side surface of the rail.

[0028] As shown in the figure, Figure 1 and Figure 4 the angle scale line 10 is distributed along the circumference of the circular arc line, and the height scale line 11 is designed as a first segment 12 and a second segment 13, the 0 height scale line 11 is arranged on the first segment 12, and the second segment 13 is located on the edge line where the vertical surface 6 and the scale surface 9 intersect. In the embodiment, the above-mentioned angle scale line 10 can intuitively and accurately read the coating angle of the lubricating grease, and the design of the height scale line 11 can conveniently and accurately read the coating height of the lubricating grease, thereby improving the use convenience of the rail lubricating grease measuring ruler.

[0029] As shown in the figure, Figures 1 to 3As shown in the figure, the pull rod 2 is provided with a locking button 14, when the locking button 14 is loosened, the pull rod 2 can be extended, when the locking button 14 is screwed, the length of the pull rod 2 is fixed. In the embodiment, the locking button 14 can adjust the extension length of the pull rod 2 according to the distance between the two rails, so that the rail lubricating grease measuring ruler is better erected on the rail, thereby improving the use convenience of the rail lubricating grease measuring ruler.

[0030] As shown in the figure, Figure 2 It also includes a template support 15, the template support 15 is installed on the template body 1 away from the scale surface 9, the template support 15 includes an installation surface, the installation surface is located on the same horizontal plane 4 with the fitting surface. In the present application, the template support block 3 increases the weight of the template body 1, so that the template body 1 is more stably fitted on the second rail 8, and the structural stability of the rail lubricating grease measuring ruler is improved.

[0031] As shown in the figure, Figures 1 to 3 It also includes a screw 16, the template body 1 is detachably installed on the pull rod 2 through the screw 16. In the embodiment, the screw 16 can be more conveniently purchased and cheap, thereby improving the production convenience of the rail lubricating grease measuring ruler and reducing the production cost of the rail lubricating grease measuring ruler.

[0032] In an embodiment of the present application, the material of the template body 1, the pull rod 2, the support block 3 and the template support 15 is an insulating material, the insulating material is not easy to conduct electricity, which avoids the short circuit caused by the conduction between the two rails when the rail lubricating grease measuring ruler is erected on the two rails, and improves the use safety of the rail lubricating grease measuring ruler.

[0033] As shown in the figure, Figures 1 to 5As shown, based on the same inventive concept, the embodiment of the present application also provides a test method for lubrication and wear reduction effect, which uses the rail lubricating grease measuring scale of the foregoing embodiment to test the lubricating grease coated on the inner side of the rail, and comprises the following steps: step one, spraying the water-based colorant on the inner side of the rail to be tested, when the colorant on the inner side of the rail is in the form of scattered water droplets, it is judged that the inner side of the rail is coated with lubricating grease, when the inner side of the rail is in the form of water flow or water film, it is judged that the inner side of the rail is not coated with lubricating grease; step two, after spraying the water-based colorant, when the inner side of the rail is coated with lubricating grease, the lubricating grease and other positions form natural stratification, the angle and / or height values of the lubricating grease are read by using the rail lubricating grease measuring scale; step three, after the lubricating grease is stable after more than 30 trains, the friction coefficient tester and the rail lubricating grease measuring scale are used to test the friction coefficients of different positions of the inner side of the rail according to the angle and / or height values of the lubricating grease measured in step two; step four, periodically measuring the rail head shape of the rail to be tested by using the rail profile instrument; step five, comparing and analyzing the standard rail profile, the rail profile without lubrication and the rail profile measured in step four to obtain the wear change of the inner side of the rail.

[0034] It should be noted that: the friction coefficient tester is a TRIBOMETER friction coefficient tester produced by L.B.Foster Company of the United States; the rail profile instrument is a Miniprof rail profile instrument produced by GREENWOOD Company of Denmark; the comparative analysis in step five is obtained by comparative analysis through the rail profile instrument analysis software; in step four, the rail profile test points are known to those skilled in the art, and five curve feature control points (straight buffer, buffer circle, curve, circle buffer and buffer straight) can be selected, among which, the curve and the circle buffer are the key observation points, and corresponding marks are made on the outer side of the test point, which can more directly reflect the actual wear reduction effect of the rail side lubrication.

[0035] The rail lubricating grease measuring scale and the test method for lubrication and wear reduction effect provided by the present application, the rail lubricating grease measuring scale comprises a template body 1, an extendable pull rod 2 and a support block 3, first, the inner side of the second rail 8 is coated with lubricating grease; then, the fitting surface on the support block 3 is fitted on the rail top surface of the first rail 7, the horizontal surface 4 on the template body 1 is fitted on the rail top surface of the second rail 8, and the vertical surface 6 is fitted on the inner side of the second rail 8; finally, the angle and height values of the lubricating grease are read according to the angle scale line 10 and the height scale line 11, which quantifies the coating position of the lubricating grease, the test method for lubrication and wear reduction effect provided by the present application improves the operation convenience of timely adjusting the coating position of the lubricating grease, and reduces the wear of the inner side of the rail.

[0036] In one embodiment of the present application, in step three, the test wheel of the friction coefficient tester is cleaned with organic solvent and cotton after each measurement of the friction coefficient of different positions on the inner side of the rail. The above operation avoids the influence of the previous test on the result of the next test, and improves the accuracy of the test result of the lubrication and wear reduction effect test method.

[0037] In one embodiment of the present application, the color of the water-based colorant is red or orange yellow. The red or orange yellow water-based colorant can be more intuitively distinguished from the color of the rail, improving the convenience of observation.

[0038] In one embodiment of the present application, the rail lubricating grease measuring ruler is used to test the lubrication and wear reduction effect of the rail to be tested, and the specific steps are as follows:

[0039] (1) Spray the red water-based colorant on the laboratory rail test block for comparison test, and the results show that the colorant has good effect on grease appearance, and the lubricating oil zone and the unlubricated area are obviously layered;

[0040] (2) Observe the rail to be tested, and select the test point near the clothoid point at the far end of the curve about 200 m away from the oiling plate. The side surface of the rail at the test point is bright, and there is no difference between the naked eye observation and the unlubricated rail side surface, and it is impossible to distinguish whether there is grease. After spraying the water-based colorant, it can be observed that part of the rail side surface has dispersed water droplets, and the surface has layering phenomenon, indicating that a stable lubricating oil film has been formed at this position.

[0041] (3) The rail lubrication position measuring ruler is erected at both ends of the rail, so that the horizontal plane 4 of the rail lubricating grease measuring ruler is flush with the top surface of the rail, and the vertical plane 6 is in close contact with the inner side of the rail. The upper and lower limits of the height of the lubricating grease are-10 mm and-25 mm respectively.

[0042] (4) Clean the surface colorant. After 30 trains pass, use the TRIBOMETER friction coefficient measuring instrument in combination with the rail lubrication position measuring ruler to test 5 test points on the surface of the lubricating grease (after each test, use the cotton soaked in acetone to clean the test wheel), and compare with the unlubricated position. The data is shown in Table 1. It can be seen that the friction coefficient of the inner side of the lubricated rail is significantly reduced, and the friction coefficient of the lubricating grease is generally below 0.2, indicating that the coating effect of the lubricating grease is good.

[0043]

[0044] Table 1 Friction coefficient measurement of rail side surface

[0045] (5) The rail head profile of the rail at the clothoid point on the curve is tested by using the Miniprof rail profile instrument, and the test period is 1-2 months, and the continuous test time is about 1 year.

[0046] The profile tested in step (5) is compared with the profile before lubrication and the standard 60kg / m rail profile, and it is calculated that the wear rate of the inner side of the rail before lubrication is 0.20mm / month, and the wear rate of the inner side after lubrication is 0.08mm / month, and the lubrication of the inner side of the rail can reduce 60% of the side wear, and the lubrication wear reduction effect is very significant.

[0047] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rail lubricating grease dipstick characterised in that, The template body, the telescopic pull rod and the supporting block are included, wherein: The template body is detachably mounted at one end of the pull rod, and the supporting block is mounted at the other end of the pull rod; The supporting block includes a fitting surface for fitting with the top surface of the first steel rail; The template body includes a horizontal surface, a quarter circular arc surface and a vertical surface connected in sequence, the circular arc surface is tangentially arranged with the horizontal surface and the vertical surface, the horizontal surface is used for fitting with the top surface of the second steel rail coated with lubricating grease, the vertical surface is used for fitting with the inner side surface of the second steel rail, and the horizontal surface and the fitting surface are located on the same horizontal plane; The template body includes a scale surface connected with the horizontal surface, the circular arc surface and the vertical surface, the scale surface is provided with angle scale lines and height scale lines for reading the application angle and the application height of the lubricating grease, the angle scale lines are arranged on the circular arc line where the circular arc surface and the scale surface intersect, the 0 angle line is arranged on the center line of the arc of the circular arc line, and the 0 height scale line is flush with the horizontal surface; The angle scale lines are distributed along the circumference of the circular arc line, the height scale lines are arranged in a first segment and a second segment, the 0 height scale line is arranged on the first segment, and the second segment is located on the edge line where the vertical surface and the scale surface intersect; The template support is mounted on the template body away from the scale surface, and the template support includes a mounting surface located on the same horizontal plane as the fitting surface.

2. The rail lubricating grease dipstick of claim 1 wherein, The pull rod is provided with a locking button, the pull rod is telescopic when the locking button is loosened, and the length of the pull rod is fixed when the locking button is tightened.

3. The rail lubricating compound dipstick of claim 1 wherein, The template body is detachably mounted on the pull rod through the screw.

4. The rail lubricating compound dipstick of claim 1 wherein, The template body, the pull rod, the supporting block and the template support are all made of insulating materials.

5. A method of testing the lubricating wear-reducing effect, characterized in that The steel rail lubricating grease measuring ruler is used to test the lubricating grease coated on the inner side surface of the steel rail, and the test includes the following steps: Step one: the water-based colorant is sprayed on the inner side surface of the steel rail to be tested, when the colorant on the inner side surface of the steel rail is in the form of scattered water droplets, it is determined that the inner side surface of the steel rail is coated with lubricating grease, and when the inner side surface of the steel rail is in the form of water flow or water film, it is determined that the inner side surface of the steel rail is not coated with lubricating grease; Step two: when the inner side surface of the steel rail is coated with lubricating grease, after the spraying of the water-based colorant is completed, the lubricating grease and other positions form a natural stratification, and the angle and / or height values of the lubricating grease are read by using the steel rail lubricating grease measuring ruler; Step three: the water-based colorant is wiped clean, after more than 30 trains pass, the lubricating grease is stabilized, and the friction coefficient tester and the steel rail lubricating grease measuring ruler are used to test the friction coefficients of different positions on the inner side surface of the steel rail according to the angle and / or height values of the lubricating grease measured in step two; Step four: the rail profile instrument is used to periodically measure the shape of the rail head of the steel rail to be tested. Step five, comparing the standard rail profile, the rail profile without lubrication and the rail profile measured in step four to obtain the wear variation of the inner side surface of the rail.

6. The test method for evaluating the lubricating friction-reducing effect according to claim 5, characterized by, In step three, after each measurement of the friction coefficient of different positions of the inner side surface of the rail is completed, the test wheel of the friction coefficient tester is cleaned using an organic solvent and cotton.

7. The test method for evaluating the lubricating friction-reducing effect according to claim 5, characterized by, The color of the water-based colorant is red or orange yellow.

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