CN109297845B - Device and method for evaluating dry and wet abrasion behaviors of material based on quantitative rolling-sliding ratio - Google Patents
Device and method for evaluating dry and wet abrasion behaviors of material based on quantitative rolling-sliding ratio Download PDFInfo
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Abstract
The invention discloses a device and a method for evaluating dry and wet abrasion behaviors of a material based on a quantitative rolling-sliding ratio, wherein the device comprises the following steps: the friction pair comprises a sample wheel and a counter-grinding wheel, wherein the sample wheel is fixedly provided with a material to be evaluated, the counter-grinding wheel is fixedly provided with a counter-grinding material, and the sample wheel and the counter-grinding wheel are in transmission fit through the friction action between the material to be evaluated and the counter-grinding material; a load mechanism at least for applying different loads between the friction pairs; the dry-wet adjusting mechanism is at least used for adjusting dry and wet abrasion conditions of a contact area of the friction pair; and a drive mechanism for driving at least one of the sample wheel and the counter-grinding wheel. The device for evaluating the dry and wet abrasion behaviors of the material based on the quantitative rolling-sliding ratio is simple in structure and convenient to operate, and can evaluate the friction behaviors in various environments, various opposite-grinding materials and various motion states.
Description
Technical Field
The invention particularly relates to a device and a method for evaluating dry and wet abrasion behaviors of a material based on a quantitative rolling-sliding ratio, and belongs to the technical field of abrasion detection.
Background
In the actual working condition, the moving parts in the modern equipment have dry or wet moving environments, different counter-grinding materials and complex moving states; some moving parts are not single pure rolling or pure sliding, but complex moving states with sliding and rolling. For example, the automobile tires are used in different situations due to different occasions and conditions. The motion state of the device is pure sliding and pure rolling, and the device also has the motion of combining rolling and sliding under the condition of a certain rolling-sliding ratio. For example, a vehicle is in a running state in which a tire rolls only during constant speed running, slides only during sudden braking, and has a certain rolling-sliding ratio during acceleration or deceleration; the operation environment may be a dry environment or a wet environment after rainy and snowy days; the contact surface is generally an asphalt road surface, a cement road surface, or the like.
In the engineering, the slip-roll ratio when two samples are in contact is defined as: s-2 (v)1-v2)/(v1+v2) Wherein v is1、v2The linear velocities of the sample and the counter grinding pair at the contact position are respectively, and the velocity difference delta v is equal to v1-v2，U＝(v1+v2) The term "/2" entrainment velocity. It is generally considered that pure scrolling is performed when S is 0, and pure sliding is performed when S is ± 2.
Most of the existing friction and wear testing machines can only evaluate the tribological behavior under a single environment, a single pair of grinding materials and a single motion state such as pure sliding or pure rolling conditions, and the abrasion behavior and the abrasion mechanism of the motion part under the actual working state are difficult to evaluate really.
Disclosure of Invention
The invention mainly aims to provide a device and a method for evaluating the dry and wet abrasion behavior of a material based on a quantitative rolling-sliding ratio, so as to overcome the defects of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
an embodiment of the present invention provides a device for evaluating dry and wet abrasion behavior of a material based on a quantitative rolling-sliding ratio, including:
the friction pair comprises a sample wheel and a counter-grinding wheel, wherein the sample wheel is fixedly provided with a material to be evaluated, the counter-grinding wheel is fixedly provided with a counter-grinding material, and the sample wheel and the counter-grinding wheel are in transmission fit through the friction action between the material to be evaluated and the counter-grinding material;
a load mechanism for applying different loads to at least the friction pair;
the dry-wet adjusting mechanism is at least used for adjusting dry and wet abrasion conditions of a contact area of the friction pair; and
and a driving mechanism for driving at least one of the sample wheel and the counter-grinding wheel.
Further, the diameters of the sample wheel and the diameter of the grinding wheel are the same or different, and the axle of the sample wheel is arranged in parallel with the axle of the grinding wheel.
Preferably, the axle of the sample wheel and the axle of the opposite grinding wheel are both horizontally arranged.
Further, the sample wheel is driven by a driving mechanism, and the pair of grinding wheels is driven by the sample wheel.
Preferably, the device further comprises a speed regulating mechanism, wherein the speed regulating mechanism is at least used for regulating the rotating speed of the sample wheel.
Preferably, the driving mechanism comprises a motor, and the speed regulating mechanism comprises a motor speed regulator matched with the motor.
Further, the load mechanism comprises a load bracket arranged on the grinding wheel and a balance weight matched with the load bracket.
Preferably, the load mechanism further comprises a load corrector connected to the counter grinding wheel, the load corrector comprising a pressure trimming block.
Further, the device further comprises a brake mechanism comprising a disc brake cooperating with the pair of grinding wheels, the disc brake cooperating with a brake disc provided on the axle of the pair of grinding wheels.
Preferably, the disc brake is in transmission connection with weight plates capable of holding weights of different specifications, and the weight plates are at least used for controlling the braking performance of the disc brake.
Preferably, the weight tray is connected with a brake caliper through at least one rope and at least one fixed pulley, and the brake caliper is matched with the disc brake.
Further, the device also comprises a speed measuring mechanism, wherein the speed measuring mechanism is at least used for measuring the rotating speed of the pair of grinding wheels.
Preferably, the speed measuring mechanism comprises an electronic counter for measuring the number of turns of the pair of grinding wheels.
Furthermore, the dry-wet adjusting mechanism comprises at least one liquid storage mechanism and a liquid conveying pipeline communicated with the liquid storage mechanism, and a liquid outlet of the liquid conveying pipeline is arranged corresponding to the friction interface of the friction pair.
Preferably, the infusion pipeline is also provided with a dropping speed regulator.
Further, the device also comprises a material collecting mechanism which is at least used for collecting the grinding dust and/or waste liquid discharged from the friction pair.
Furthermore, the device also comprises a frame, and the friction pair, the load mechanism, the dry-wet adjusting mechanism and the driving mechanism are all arranged on the frame.
The embodiment of the invention also provides a method for evaluating the dry and wet abrasion behavior of a material based on the quantitative rolling-sliding ratio, which comprises the following steps:
the device for evaluating the dry-wet abrasion behavior of the material based on the quantitative rolling-sliding ratio is provided,
respectively fixing a material to be evaluated and a counter-grinding material on a sample wheel and a counter-grinding wheel; and
the sample wheel is rotated at a certain rotating speed and drives the grinding wheel to rotate, and the quantitative evaluation of the material friction behavior under different slip-roll ratio conditions is realized by adjusting the motion state of the grinding wheel.
Preferably, the method further comprises: before the sample wheel drives the counter-grinding wheel to rotate or in the process of driving the counter-grinding wheel to rotate, liquid is selectively dripped or not dripped in a contact area of the friction pair through the dry-wet adjusting mechanism, so that the dry-wet abrasion condition is changed.
Further, different loads are applied to the friction pair through a load mechanism.
Preferably, the method comprises the following steps: the rotating speed of the grinding wheel is adjusted through the braking mechanism.
Preferably, the method specifically comprises the following steps:
only the grinding wheel is braked by the disc brake, so that quantitative evaluation of the friction behavior of the material under different slip-roll ratios is realized:
v＝ωr＝2πnr＝πdn (1)
in the formula (1), v is the wheel linear velocity, r is the wheel radius, d is the wheel diameter, n is the wheel rotating speed, omega is the wheel angular velocity,
in the formula (2), v1、n1And d1The linear velocity, the rotating speed and the diameter of the sample wheel are respectively; v. of2、n2And d2The linear velocity, the rotating speed and the diameter of the grinding wheel are respectively;
the quantitative roll ratio and corresponding motion states are as follows:
n2＝0，n2d20, S2, pure sliding,
n1d1＝n2d2s is 0, which is pure scrolling,
n1d1≠n2d2not equal to 0, S not equal to 0 and S not equal to + -2, rolling with sliding.
Preferably, the method further comprises: and collecting abrasive dust and/or waste liquid output by the friction pair in the friction process, cleaning the sample wheel, carrying out subsequent analysis and evaluation on the abrasive dust and the abrasive marks on the surface of the material to be evaluated.
Compared with the prior art, the device for evaluating the dry-wet abrasion behavior of the material based on the quantitative rolling-sliding ratio has the advantages of simple structure and concise method, is beneficial to accurately evaluating the abrasion behavior and the abrasion mechanism of the moving part in the actual working state, can more comprehensively simulate the evaluation of the abrasion performance of the material to be evaluated in the rolling motion with different rolling ratios under different conditions by changing the load, the counter-abrasion material and the dry-wet environment, and has low cost and wide application prospect.
Drawings
FIG. 1 is a schematic mechanical diagram of an apparatus for evaluating the dry-wet wear behavior of a material based on a quantitative roll-to-slip ratio in an exemplary embodiment of the present invention;
FIG. 2 is a graph showing the relationship between different slip ratios and wear amounts in example 1 of the present invention;
FIG. 3a is a graph showing the profile of a wear scar when the slip-to-roll ratio S is 0 in example 1 of the present invention;
FIG. 3b is a graph showing the profile of wear scars when the dry abrasion down-roll ratio S is 0.269 in example 1 of the present invention;
FIG. 3c is a graph showing the profile of wear scars when the dry abrasion slip-roll ratio S is 0.533 in example 1 of the present invention;
FIG. 3d is a graph showing the profile of wear scar when the dry abrasion slip ratio S is 0.815 in example 1 of the present invention;
FIG. 4a is a graph showing the profile of the swarf at a dry abrasion slip ratio S of 0 in example 1 of the present invention;
FIG. 4b is a graph showing the profile of the swarf at a dry abrasion slip ratio S of 0.269 in example 1 of the present invention;
fig. 4c is a diagram showing the morphology of the swarf when the dry abrasion slip-roll ratio S is 0.533 in example 1 of the present invention;
FIG. 4d is a graph showing the profile of the swarf produced when the dry abrasion slip ratio S is 0.815 in example 1 of the present invention;
description of reference numerals: the automatic measuring device comprises a fixing clamp 1, a 2-iron stand, a 3-infusion bag, a 4-fixed pulley, a 5-flexible steel wire, a 6-weight, a 7-weight stand, an 8-electronic counter, a 9-brake caliper, a 10-disc brake, a 11-counterweight, a 12-load bracket, a 13-brush, a 14-pair grinding wheel, a 15-disc shaft fastener, a 16-pair grinding wheel rotating shaft, a 17-brake disc, an 18-pressure fine adjustment block, a 19-plastic hose, a 20-dropping liquid speed regulator, a 21-sample wheel, a 22-scrap collecting liquid collector, a 23-motor and a 24-motor speed regulator.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
An embodiment of the present invention provides a device for evaluating dry and wet abrasion behavior of a material based on a quantitative rolling-sliding ratio, including:
the friction pair comprises a sample wheel and a counter-grinding wheel, wherein the sample wheel is fixedly provided with a material to be evaluated, the counter-grinding wheel is fixedly provided with a counter-grinding material, and the sample wheel and the counter-grinding wheel are in transmission fit through the friction action between the material to be evaluated and the counter-grinding material;
a load mechanism for applying different loads to at least the friction pair;
the dry-wet adjusting mechanism is at least used for adjusting dry and wet abrasion conditions of a contact area of the friction pair; and
and a driving mechanism for driving at least one of the sample wheel and the counter-grinding wheel.
Further, the diameters of the sample wheel and the diameter of the grinding wheel are the same or different, and the axle of the sample wheel is arranged in parallel with the axle of the grinding wheel.
Preferably, the axle of the sample wheel and the axle of the opposite grinding wheel are both horizontally arranged.
Further, the sample wheel is driven by a driving mechanism, and the pair of grinding wheels is driven by the sample wheel.
Preferably, the device further comprises a speed regulating mechanism, wherein the speed regulating mechanism is at least used for regulating the rotating speed of the sample wheel.
Preferably, the driving mechanism comprises a motor, and the speed regulating mechanism comprises a motor speed regulator matched with the motor.
Further, the load mechanism comprises a load bracket arranged on the grinding wheel and a balance weight matched with the load bracket.
Preferably, the load mechanism further comprises a load corrector connected to the counter grinding wheel, and the load corrector comprises a pressure fine adjustment block for correcting the pressure between the friction pairs.
Further, the device further comprises a brake mechanism comprising a disc brake cooperating with the pair of grinding wheels, the disc brake cooperating with a brake disc provided on the axle of the pair of grinding wheels.
Preferably, the disc brake is in transmission connection with weight plates capable of holding weights of different specifications, and the weight plates are at least used for controlling the braking performance of the disc brake.
Preferably, the weight tray is connected with a brake caliper through at least one rope and at least one fixed pulley, and the brake caliper is matched with the disc brake.
Further, the device also comprises a speed measuring mechanism, wherein the speed measuring mechanism is at least used for measuring the rotating speed of the pair of grinding wheels.
Preferably, the speed measuring mechanism comprises an electronic counter for measuring the number of turns of the pair of grinding wheels.
Furthermore, the dry-wet adjusting mechanism comprises at least one liquid storage mechanism and a liquid conveying pipeline communicated with the liquid storage mechanism, and a liquid outlet of the liquid conveying pipeline is arranged corresponding to the friction interface of the friction pair.
Preferably, the infusion pipeline is also provided with a dropping speed regulator.
Further, the device also comprises a material collecting mechanism which is at least used for collecting the grinding dust and/or waste liquid discharged from the friction pair.
Furthermore, the device also comprises a frame, and the friction pair, the load mechanism, the dry-wet adjusting mechanism and the driving mechanism are all arranged on the frame.
The embodiment of the invention also provides a method for evaluating the dry and wet abrasion behavior of a material based on the quantitative rolling-sliding ratio, which comprises the following steps:
the device for evaluating the dry-wet abrasion behavior of the material based on the quantitative rolling-sliding ratio is provided,
respectively fixing a material to be evaluated and a counter-grinding material on a sample wheel and a counter-grinding wheel; and
the sample wheel is rotated at a certain rotating speed and drives the grinding wheel to rotate, and the quantitative evaluation of the material friction behavior under different slip-roll ratio conditions is realized by adjusting the motion state of the grinding wheel.
Preferably, the method further comprises: before the sample wheel drives the counter-grinding wheel to rotate or in the process of driving the counter-grinding wheel to rotate, liquid is selectively dripped or not dripped in a contact area of the friction pair through the dry-wet adjusting mechanism, so that the dry-wet abrasion condition is changed.
Further, different loads are applied to the friction pair through a load mechanism.
Preferably, the method comprises the following steps: the rotating speed of the grinding wheel is adjusted through the braking mechanism.
Preferably, the method specifically comprises the following steps:
only the grinding wheel is braked by the disc brake, so that quantitative evaluation of the friction behavior of the material under different slip-roll ratios is realized:
v＝ωr＝2πnr＝πdn (1)
in the formula (1), v is the wheel linear velocity, r is the wheel radius, d is the wheel diameter, n is the wheel rotating speed, omega is the wheel angular velocity,
in the formula (2), v1、n1And d1The linear velocity, the rotating speed and the diameter of the sample wheel are respectively; v. of2、n2And d2The linear velocity, the rotating speed and the diameter of the grinding wheel are respectively;
the quantitative roll ratio and corresponding motion states are as follows:
n2＝0，n2d20, S2, pure sliding,
n1d1＝n2d2s is 0, which is pure scrolling,
n1d1≠n2d2not equal to 0, S not equal to 0 and S not equal to + -2, rolling with sliding.
Preferably, the method further comprises: and collecting abrasive dust and/or waste liquid output by the friction pair in the friction process, cleaning the sample wheel, carrying out subsequent analysis and evaluation on the abrasive dust and the abrasive marks on the surface of the material to be evaluated.
Specifically, referring to fig. 1, in some more specific embodiments of the present invention, an apparatus for evaluating dry and wet wear behavior of a material based on a quantitative roll-to-slip ratio includes a test frame, a friction pair is fixed on the test frame, the friction pair includes a test wheel 21 and a counter-grinding wheel 14, the test wheel 21 is fixed with a material to be evaluated (the material to be evaluated may be a coating material, a rubber material for sealing and tire, etc.), the counter-grinding wheel 14 is fixed with a counter-grinding material (the counter-grinding material may be steel, ceramic, or a material simulating a road surface, etc.), and the test wheel and the counter-grinding wheel are in transmission fit through a friction effect between the material to be evaluated and the counter-grinding material; the sample wheel 24 is driven by a driving mechanism 23, a driving motor is connected with a motor speed regulator 24, and the rotating speed of the sample wheel can be measured and regulated by regulating the motor speed regulator 24 so as to be regulated to the rotating speed required by the test; the grinding wheel 14 is driven by the sample wheel 21;
a load mechanism which comprises a load bracket 12 arranged on the grinding wheel, a pressure fine adjustment block 18 (used for correcting the pressure between the friction pairs) and a counterweight 11 matched with the load bracket, wherein different loads are applied to the surface of the test material by applying counterweights with different masses on the load bracket;
the dry-wet adjusting mechanism comprises at least one infusion bag 3 (the infusion bag can be hung on an iron stand 2 fixed with a fixing clamp 1) and a plastic hose 19 communicated with the infusion bag, a dropping liquid speed regulator 20 is further arranged on the plastic hose 19, and a liquid outlet of the plastic hose 19 is arranged corresponding to a friction interface of the friction pair and at least used for adjusting dry and wet abrasion conditions of a contact area of the friction pair;
the braking mechanism comprises a disc brake 10 matched with the counter-grinding wheels, the disc brake is matched with a brake disc 17 arranged on a rotating shaft 16 of the counter-grinding wheels, the disc brake is also in transmission connection with a weight tray 7 capable of containing weights 6 with different specifications, the weight tray 7 is connected with a brake caliper 9 through a soft steel wire 5 and at least a fixed pulley 4, weights with different qualities are placed in the weight tray, different loads are applied to the brake caliper, and different rotating speed regulation and control of the counter-grinding wheels are realized through the disc brake;
the speed measuring mechanism comprises an electronic counter 8 for measuring the number of rotation turns of the grinding wheel, and the number of turns recorded by the counter corresponding to the abrasion time is used for calculating the rotation speed of the grinding wheel;
the material collecting mechanism comprises a material collecting liquid collector 22 which is arranged at the lower part of the friction interface of the friction pair and is used for collecting the grinding dust and/or waste liquid discharged from the friction pair; in addition, the collecting mechanism also comprises a brush 13 which can be contacted with the grinding material on the grinding wheel, so that the grinding dust generated by friction is separated from the grinding wheel and falls into a collecting liquid collector.
In some more specific embodiments of the present invention, a method for evaluating the dry-wet wear behavior of a material based on a quantitative slip ratio may specifically comprise the steps of:
(1) respectively coating or adhering a material to be evaluated and a counter-grinding material on a sample wheel and a counter-grinding wheel;
(2) the sample wheel sets a certain rotating speed through a motor speed regulator to drive the grinding wheel to rotate together;
(3) different loads are applied to the grinding wheel by placing counter weights with different weights on the load support;
(4) through a dropping liquid speed regulating switch, the dry-wet regulating mechanism selectively drops or does not drop liquid in a contact area of the friction pair to realize the change of dry-wet abrasion;
(5) only the grinding wheel is braked by the disc brake, so that quantitative evaluation of the friction behavior of the material under different slip-roll ratios is realized:
v＝ωr＝2πnr＝πdn (1)
in the formula (1), v is the wheel linear velocity, r is the wheel radius, d is the wheel diameter, n is the wheel rotating speed, omega is the wheel angular velocity,
v in the formula (2)1、n1And d1The linear velocity, the rotating speed and the diameter of the sample wheel are respectively; v. of2、n2And d2The linear velocity, the rotating speed and the diameter of the grinding wheel are respectively;
the quantitative roll-to-roll ratio and the corresponding motion state are as follows:
n2＝0，n2d20, 2, pure sliding;
n1d1＝n2d2s is 0, which is pure rolling;
n1d1≠n2d2not equal to 0, S not equal to 0 and S not equal to +/-2, which is rolling with sliding;
(6) after a certain time of friction, recording the number of turns on an electronic counter so as to obtain the rotating speed of the grinding wheel, and measuring the rotating speed of the sample wheel by a motor speed regulator;
(7) weights with different masses are placed in the weight tray, and the braking performance of the disc brake is controlled, so that the grinding wheels can obtain different rotating speeds;
(8) and in the friction process, abrasive dust/waste liquid is collected through a dust collecting liquid collector below the friction pair, abrasive dust on two wheels is cleaned, and subsequent analysis and evaluation are carried out on the abrasive dust and the surface abrasive marks of the sample.
Example 1
The device and the method for evaluating the dry-wet abrasion behavior of the material based on the quantitative rolling-sliding ratio provided by the invention are used for evaluating the abrasion performance of the tire carbon black-white carbon black dual-phase filler SSBR/BR rubber and a commercial grinding wheel during grinding.
The test procedure was as follows:
(1) cutting rubber to be measured into a strip shape, adhering the strip shape to a sample wheel, wherein the sample is not required to be subjected to tension when adhering, the joint is required to be smoothly transited when adhering, the adhered sample wheel is placed in a test environment for at least 16 hours, the sample wheel adopts a rubber wheel, the grinding wheel is a commercial grinding wheel, the diameter of the rubber wheel is 75mm, and the diameter of the grinding wheel is 150 mm;
(2) applying a load 27N to the surface of the sample material by placing a counterweight load on the load carriage;
(3) setting the rotating speed of the rubber wheel to be 76r/min, emptying a weight tray of a braking device and no braking; the rubber wheel drives the grinding wheel to rotate, the rotating speed of the grinding wheel is 38r/min, and the slip-roll ratio is 0; setting the rubber rotation speed to be 76r/min, adding weights to the weight tray to apply brake to the grinding wheels, wherein the grinding wheel rotation speeds are 29r/min, 22r/min and 16r/min respectively, and the sliding-rolling ratios S are 0.269, 0.533 and 0.815 respectively corresponding to the grinding wheels, and are rolling with sliding;
(4) selecting dry abrasion, collecting abrasive dust through a tray below a first rotating wheel and a second rotating wheel in a friction process, cleaning the abrasive dust on the rotating wheels to the tray below after the friction process is carried out for a specified time, and analyzing and evaluating the abrasive dust and the surface abrasion marks of the rubber.
As can be seen from fig. 2, the wear is extremely small when the slip ratio is 0, that is, when the roller is rolling, and the wear quality increases sharply as the slip ratio increases, that is, as the ratio occupied by the slip increases.
FIGS. 3a-d are the profile of wear scar and abrasive dust respectively under different dry abrasion and slip ratios; when the slip-roll ratio S is 0, i.e., pure rolling, almost no wear marks are formed, and the surface is flat. The slip-roll ratio S is not equal to 0 and not equal to +/-2, namely when the belt rolls in a sliding mode, the obvious yarn Mach pattern appearance appears, the depth and the width between the convex ribs are increased along with the increase of the slip-roll ratio, and the convex ribs are obviously warped under the high slip-roll ratio.
Fig. 4a-d show the shapes of the abrasive dusts under different dry abrasion and different slip ratios, and it can be seen from fig. 4a that when S is 0 pure slip, the abrasive dusts are in the form of tiny particles, and the quantity is extremely small, which belongs to abrasive wear. S is not equal to 0 and not equal to +/-2, namely, the sliding rolling is contained, and the abrasive dust has two shapes, namely micron-sized cluster abrasive dust and millimeter-sized spindle-shaped abrasive dust, and belongs to the coupling of abrasive particle abrasion and curling abrasion.
The device for evaluating the dry-wet abrasion behavior of the material based on the quantitative rolling-sliding ratio is simple in structure and concise in method, is beneficial to accurately evaluating the abrasion behavior and the abrasion mechanism of the moving part in the actual working state, can more comprehensively simulate the evaluation of the abrasion performance of the material to be evaluated in the rolling motion with different rolling ratios under different conditions by changing the load, the counter-abrasion material and the dry-wet environment, and has low cost and wide application prospect.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. An apparatus for evaluating dry-wet abrasion behavior of a material based on a quantitative roll-to-slip ratio, comprising:
the friction pair comprises a sample wheel and a counter-grinding wheel, wherein the sample wheel is fixed with a material to be evaluated, the counter-grinding wheel is fixed with a counter-grinding material, the sample wheel and the counter-grinding wheel are in transmission fit through the friction action between the material to be evaluated and the counter-grinding material, the sample wheel is driven by a driving mechanism, and the counter-grinding wheel is driven by the sample wheel;
the load mechanism is at least used for applying different loads to the friction pair and comprises a load bracket arranged on the grinding wheel, a balance weight matched with the load bracket and a load corrector connected with the grinding wheel, and the load corrector comprises a pressure fine adjustment block;
the dry-wet adjusting mechanism is at least used for adjusting dry and wet abrasion conditions of a contact area of the friction pair, the dry-wet adjusting mechanism comprises at least one liquid storage mechanism and a liquid conveying pipeline communicated with the liquid storage mechanism, and a liquid outlet of the liquid conveying pipeline is arranged corresponding to a friction interface of the friction pair;
the braking mechanism comprises a disc brake matched with a pair of grinding wheels, the disc brake is matched with a braking disc arranged on an axle of the pair of grinding wheels, the disc brake is also in transmission connection with weight plates capable of containing weights of different specifications, the weight plates are at least used for controlling the braking performance of the disc brake, the weight plates are connected with a brake caliper through at least one rope and at least one fixed pulley, and the brake caliper is matched with the disc brake;
the speed measuring mechanism is at least used for measuring the rotating speed of the pair of grinding wheels;
the material collecting mechanism is at least used for collecting the grinding dust and/or waste liquid discharged from the friction pair;
drive mechanism, and
the friction pair, the load mechanism, the dry-wet adjusting mechanism and the driving mechanism are all installed on the rack.
2. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 1, wherein: the diameters of the sample wheel and the counter grinding wheel are the same or different, and the wheel axle of the sample wheel is parallel to the wheel axle of the counter grinding wheel.
3. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 2, wherein: the axle of the sample wheel and the axle of the grinding wheel are both horizontally arranged.
4. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 1, wherein: the device also comprises a speed regulating mechanism, wherein the speed regulating mechanism is at least used for regulating the rotating speed of the sample wheel.
5. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 4, wherein: the driving mechanism comprises a motor, and the speed regulating mechanism comprises a motor speed regulator matched with the motor.
6. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 1, wherein: the speed measuring mechanism comprises an electronic counter used for measuring the number of rotation turns of the grinding wheel.
7. The apparatus for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-sliding ratio according to claim 1, wherein: and the infusion pipeline is also provided with a dropping speed regulator.
8. A method for evaluating dry-wet wear behavior of a material based on a quantitative roll-to-slip ratio, comprising:
providing the device for evaluating the dry-wet abrasion behavior of a material based on a quantitative rolling-slip ratio according to any one of claims 1 to 7,
respectively fixing a material to be evaluated and a counter-grinding material on a sample wheel and a counter-grinding wheel; the sample wheel is rotated at a certain rotating speed and drives the grinding wheel to rotate, and the quantitative evaluation of the material friction behavior under different rolling-sliding ratio conditions is realized by adjusting the motion state of the grinding wheel; before the sample wheel drives the counter-grinding wheel to rotate or in the process of driving the counter-grinding wheel to rotate by the sample wheel, liquid is selectively dripped or not dripped in a contact area of the friction pair through the dry-wet adjusting mechanism, the dry-wet abrasion condition is changed, and different loads are applied to the friction pair through the load mechanism;
adjusting the rotating speed of the grinding wheel through a braking mechanism;
only the grinding wheel is braked by the disc brake, so that quantitative evaluation of the friction behavior of the material under different rolling-sliding ratio conditions is realized:
in the formula (1)
In order to determine the linear speed of the wheel,
is the radius of the wheel, and is,
the diameter of the wheel is the diameter of the wheel,
in order to set the rotational speed of the wheel,
in order to be the angular velocity of the wheel,
in the formula (2), vl、n1And d1The linear velocity, the rotating speed and the diameter of the sample wheel are respectively; v. of2、n2And d2The linear velocity, the rotating speed and the diameter of the grinding wheel are respectively, and S is the rolling-sliding ratio;
the quantitative roll-to-slip ratio and corresponding motion states are as follows:
and collecting abrasive dust and/or waste liquid output by the friction pair in the friction process, cleaning the sample wheel, carrying out subsequent analysis and evaluation on the abrasive dust and the abrasive marks on the surface of the material to be evaluated.
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| US3852993A (en) * | 1972-08-01 | 1974-12-10 | M Bronovets | Method of determining the frictional and mechanical properties of materials and a device for the realization thereof |
| CN101458138A (en) * | 2008-11-12 | 2009-06-17 | 陶泽成 | Perambulator brake force test machine |
| CN202533258U (en) * | 2011-12-19 | 2012-11-14 | 芜湖市中兴机械技术开发有限公司 | A testing rack of an automobile hand braking fatigue test |
| CN203132938U (en) * | 2013-02-21 | 2013-08-14 | 北京市金颐盛林科技发展有限责任公司 | Abrasion contrast tester |
| CN106248512A (en) * | 2016-07-11 | 2016-12-21 | 中国科学院宁波材料技术与工程研究所 | A kind of method and device of assessment material abrasion behavior |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3852993A (en) * | 1972-08-01 | 1974-12-10 | M Bronovets | Method of determining the frictional and mechanical properties of materials and a device for the realization thereof |
| CN101458138A (en) * | 2008-11-12 | 2009-06-17 | 陶泽成 | Perambulator brake force test machine |
| CN202533258U (en) * | 2011-12-19 | 2012-11-14 | 芜湖市中兴机械技术开发有限公司 | A testing rack of an automobile hand braking fatigue test |
| CN203132938U (en) * | 2013-02-21 | 2013-08-14 | 北京市金颐盛林科技发展有限责任公司 | Abrasion contrast tester |
| CN106248512A (en) * | 2016-07-11 | 2016-12-21 | 中国科学院宁波材料技术与工程研究所 | A kind of method and device of assessment material abrasion behavior |
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