CN112432873A - Device and method for detecting abrasion of fine particles of tread rubber composite material - Google Patents
Device and method for detecting abrasion of fine particles of tread rubber composite material Download PDFInfo
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a device and a method for detecting the abrasion of fine particles of a tread rubber composite material, wherein the device comprises the following components: the sealing case is internally provided with a rubber wheel fixing frame for mounting a rubber wheel; the grinding wheel is positioned in the sealed case and can drive the rubber wheel arranged on the rubber wheel fixing frame to rotate; the transmission shaft of the motor is connected with the grinding wheel; the load applying assembly is connected with the rubber wheel fixing frame and is used for applying load to the rubber wheel; the multi-stage collision collection sampler is communicated with the inside of the sealed case through a first hose. The method comprises the following steps: s1, applying a preset load to the rubber wheel to be tested, setting the rotating speed of the motor as a first rotating speed, and setting the rotating speed of the rubber wheel as a preset value; s2, carrying out abrasion operation on the rubber wheel to be detected, and collecting suspended particles in the abrasion operation process; and S3, calculating the wear value and/or the discharge value of the rubber wheel to be measured. The method can detect the abrasion of the fine particles of the tread rubber composite material with different components.
Description
Technical Field
The invention relates to the technical field of characterization of composite materials, in particular to a device and a method for detecting the abrasion of fine particles of a tread rubber composite material.
Background
Automobile emission is divided into exhaust emission and non-exhaust emission, and due to the improvement of automobile exhaust emission control technology and emission standard in recent years, the exhaust emission is well controlled. However, the research on the emission of non-exhaust gas (non-exhaust) of the automobile is deficient, the emission of non-exhaust gas particles of the automobile is estimated to account for 80% -90% of the total emission in 2020, and the emission of non-exhaust gas pipes mainly comprises the brake wear of the automobile, the wear of rubber wheels, the wear of road surfaces and the dust of the automobile. Among them, rubber wheel wear is one of the important sources of non-exhaust emissions.
The fine particles generated by the abrasion of the rubber wheel comprise rubber particles, filler particles and the like, the size of the abraded rubber particles is several micrometers to hundreds of micrometers, and the abraded filler particles are nano-sized and are easy to float in the air, so that the rubber wheel causes diseases and pollutes the environment. It is reported that the tread wear rate of each rubber wheel is between 0.008 to 0.09gkm-1 depending on driving conditions, road, rubber wheel structure, vehicle load, and the like. Conservative estimation is carried out in China, the abrasion loss of 2.8 million automobiles (1 automobile with 4 rubber wheels) per hundred kilometers of rubber wheels in the prior art is 0.09 million tons/100 km, and if the annual driving mileage of 2.8 automobiles is 1 million kilometers, the total amount of solid particles discharged by the automobiles in the whole country in 1 year is 9 million tons. The production of these solid particulates amounts to the consumption of nearly 18 million tons of crude oil.
Therefore, researches show that the influence of fine particles generated by the abrasion of the rubber wheel on the air quality cannot be ignored, so that the method has important research value for detecting the abrasion of the fine particles of the tread rubber composite material with different components and has important practical significance.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems of the prior art, the invention provides a device for detecting the abrasion of fine particles of a tread rubber composite material, which comprises:
the sealing case is internally provided with a rubber wheel fixing frame for mounting a rubber wheel;
the grinding wheel is positioned in the sealed case and can drive the rubber wheel arranged on the rubber wheel fixing frame to rotate;
the motor is positioned at the bottom of the sealed case, and a transmission shaft of the motor is connected with the grinding wheel;
the load applying assembly is connected with the rubber wheel fixing frame and is used for applying load to the rubber wheel;
and the multi-stage collision collection sampler is communicated with the inside of the sealed case through a first hose.
Optionally, the grinding wheel is a 160-mesh white corundum grinding wheel.
Optionally, the rubber wheel fixing frame includes a bracket fixed in the density chassis, a key connected to the bracket, a first baffle, and a second baffle.
Optionally, the load applying assembly comprises a beam connected to the rubber wheel holder and a weight mounted at an end of the beam.
Optionally, the tread rubber composite material fine particle abrasion detection device comprises a gas collection unit, and the gas collection unit is communicated with the inside of the sealed case through a second hose.
The invention provides a method for detecting the abrasion of fine particles of a tread rubber composite material, which comprises the following steps:
s1, applying a preset load to the rubber wheel to be tested, setting the rotating speed of the motor as a first rotating speed, and setting the rotating speed of the rubber wheel as a preset value; the motor is connected with a grinding wheel, and the grinding wheel is in contact with the rubber wheel to be tested and can drive the rubber wheel to be tested to rotate;
s2, carrying out abrasion operation on the rubber wheel to be detected, and collecting suspended particles in the abrasion operation process;
and S3, calculating the wear value and/or the discharge value of the rubber wheel to be measured.
Optionally, the preset load is calculated according to an actual grounding pressure and a load-pressure curve of the automobile.
Optionally, the rotational speed n of the grinding wheel is equal to V1*D2/(π*D3*D1) (ii) a Wherein, V1For the running speed to be tested, D1For the actual specification of rubber wheels for automobiles D2Is the diameter of the rubber wheel, D3Is the diameter of the grinding wheel; wherein, V1Taken from any value of 45 km/h-75 km/h.
Optionally, the step S3 includes:
weighing and recording the mass M of the rubber wheel after the abrasion operation by a one-ten-thousandth balance, obtaining the mass M of the rubber wheel before the abrasion operation, and recording the abrasion value as M-M; and/or
Weighing the mass w of the aluminum foil in the micropore uniform deposition type collision sampler after the abrasion operation by using a one-hundred-thousand balance; the mass W of the aluminum foil before the abrasion operation was obtained and the emission value was recorded as W-W.
Optionally, repeating the steps S1 and S2 until the rubber tire abrasion operation is completed by a preset amount, and then proceeding to the step S3, wherein the preset amount is 5-14.
The invention provides a device and a method for detecting the abrasion of fine particles of tread rubber composite materials, which can detect the abrasion of the fine particles of the tread rubber composite materials with different components.
The features and content of these solutions will be better understood by those skilled in the art from reading the present description.
Drawings
The advantages and realisation of the invention will be more apparent from the following detailed description, given by way of example, with reference to the accompanying drawings, which are given for the purpose of illustration only, and which are not to be construed in any way as limiting the invention, and in which:
FIG. 1 is a schematic view of a device for detecting the abrasion of fine particles in a tread rubber composite material according to an embodiment of the invention.
Fig. 2 is a schematic flow chart of a method for detecting the wear of fine particles in a tread rubber composite material according to an embodiment of the invention.
Fig. 3 is a schematic view of a load-pressure curve of an embodiment of the present invention.
Detailed Description
As shown in FIG. 1, the present invention provides a device for detecting the wear of fine particles in a tread rubber composite material, which comprises a wear unit and a collection unit.
The abrasion unit comprises a sealed case 21, a grinding wheel 22, a motor 23, a rubber wheel fixing frame 24 and a load applying component. The grinding wheel 22 is located in the sealed case 21, the motor 23 is located at the bottom of the sealed case and attached to the sealed case through a bearing, and a transmission shaft of the motor 23 is connected with a base of the grinding wheel 22. The control panel of the motor can be arranged on the outer wall of the sealed case 21, the control panel can control the rotating speed of the motor, the motor drives the grinding wheel to rotate, and the grinding wheel drives the rubber wheel to rotate. The grinding wheel 22 is made of 160-mesh white corundum. Preferably, the sealed cabinet 21 is further provided with an air heater 27 for heating the air in the sealed space.
The in-process that the rubber tyer was gone on the emery wheel can lead to the rubber tyer surface to produce serious viscidity phenomenon because of the generating heat reason of friction, influences the collection of the particulate matter that can suspend, is unfavorable for the experiment. But the friction between the rubber wheel and the grinding wheel is too small for a long time, the rubber wheel cannot be abraded, the experimental period is too long, and the experimental period is also not preferable. The embodiment selects the white corundum grinding wheel of 160 meshes and rubber wheels to carry out the experiment, and the grinding wheel surface does not have obvious viscidity phenomenon after the grinding wheel has been changeed 60000 and has been changeed, satisfies ten rubber wheels simultaneously and produces the particulate matter that can suspend of sufficient volume after ending an experimental period, has very high experimental accuracy.
A rubber wheel holding bracket 24 is located on one side of the grinding wheel 22. In this embodiment, the rubber wheel holder 24 includes a bracket 31, a key 33, a first stop plate 35, and a second stop plate 37. The bracket 31 includes a pillar 32 fixed on the sealed cabinet and a beam 34 mounted on the pillar 32, wherein the beam 34 is preferably rotatable around its connection point with the pillar 32 within a predetermined angle range. The key 33 and the first shutter 35 are coaxially provided on the cross member 34. Wherein the key 33 is also directly connected to the first shutter 35. The rubber wheel is fixed by mounting the rubber wheel on the first baffle plate and fixing the second baffle plate 37 on the first baffle plate 35 by screws. The rubber wheel 39 is installed between the first shutter 35 and the second shutter 37, and the first shutter 35 and the second shutter 37 do not rotate.
The load applying assembly is connected with the rubber wheel fixing frame and is used for applying load to the rubber wheel. In this embodiment, the load applying assembly includes a long rod 36 and a weight 38, the long rod 36 is connected to the second blocking plate 37, the weight 38 can be placed on the long rod 36, and the load on the rubber wheel can be changed by changing the mass of the weight 38.
The collection unit comprises a multistage collision collection sampler 41, a round hole is arranged on the sealed case 21, a first hose 43 is used for connecting the round hole and the micropore uniform deposition type multistage collision sampler, and a first valve 45 is arranged on the first hose 43 and used as a collection device of suspensible particles. The multistage collision collection sampler 41 is provided with a vacuum pump 47. The particle size range of the multi-stage collision collecting sampler 41 is 0.056 μm to 18 μm.
In this embodiment, a gas collection unit may be further included, and the gas collection unit is communicated with the inside of the sealed cabinet through a second hose 42, and more specifically, the top of the sealed cabinet is provided with a through hole through which the second hose 42 is communicated with the inside of the sealed cabinet. A second valve 44 may be provided on the second hose. The gas collection unit comprises a high efficiency filter 51, a sampling pump 52, a small flow controller 53 and a gas collection bag 54 connected in sequence.
As shown in fig. 2, the present invention provides a method for detecting wear of fine particles of tread rubber composite material, which can be implemented by using the apparatus for detecting wear of fine particles of tread rubber composite material provided by the present invention, and comprises the following steps:
s1, applying a preset load to the rubber wheel to be tested, setting the rotating speed of the motor as a first rotating speed, and setting the rotating speed of the rubber wheel as a preset value; the motor is connected with a grinding wheel, and the grinding wheel is in contact with the rubber wheel to be tested and can drive the rubber wheel to be tested to rotate;
s2, carrying out abrasion operation on the rubber wheel to be detected, and collecting suspended particles in the abrasion operation process;
and S3, calculating the wear value and/or the discharge value of the rubber wheel to be measured.
In this embodiment, the preset load is calculated according to the actual grounding pressure and the load-pressure curve of the vehicle. The actual grounding pressure of the automobile is about 0.7MPa, so that the grounding pressure of the rubber tire is about 0.7MPa when more or less kilograms of weights are added to one end of the cross beam by calculating by using an indentation area method in order to simulate the actual grounding pressure of the rubber wheel.
More specifically, the distance between the center of the rubber wheel and the support is recorded as L1, and the distance between the center of the rubber wheel and the other end of the cross beam is recorded as L2; the supporting force of the grinding wheel to the rubber wheel is N, the mass of the weight is M, the pressure of the rubber wheel to the grinding wheel is F, the grounding area A of the rubber wheel is A, and the grounding pressure is P, so that the formula is shown as follows:
Mg(L1+L2)＝NL1 (1)
P＝F/A (2)
N＝F (3)
from equations (1), (2) and (3), equation (4) can be derived: p ═ Mg (L2/L1+1)/A
One side of a rubber wheel is dipped with the Indonesia, a layer of 16-inch coordinate paper is padded on a grinding wheel, the rubber wheel is installed on a front clamp of a supporting shaft of the rubber wheel and is fixed by a rear clamp, one side of the rubber wheel dipped with the Indonesia is placed on the coordinate paper, and the area of different weight masses pressed on the coordinate paper corresponding to the Indonesia is seen by changing the mass of the weight, namely the grounding area of the rubber wheel.
The areas of the corresponding printing dampens pressed on the coordinate paper with the weights of 5kg, 10kg, 15kg, 20kg, 25kg and 30kg are respectively obtained through experiments: 277mm2、330mm2、361mm2、368mm2、369mm2、378mm2。
The grounding pressures corresponding to the above can be calculated according to the formula (4):
5kg P＝(5*9.8*3.6)N/277*10*10-6m2＝0.64MPa
10kg P＝(10*9.8*3.6)N/330*10-6m2＝1.07MPa
15kg P＝(15*9.8*3.6)N/361*10-6m2＝1.47MPa
20kg P＝(20*9.8*3.6)N/368*10-6m2＝1.92MPa
25kg P＝(25*9.8*3.6)N/369*10-6m2＝2.39MPa
30kg P＝(30*9.8*3.6)N/378*10-6m2＝2.80MPa
therefore, we can make a load-pressure curve as shown in FIG. 3, and make a load-pressure fitting curve R20.99938, meets the standard requirement R2>0.999, the linear relationship is evident. When the weight mass is 6kg, the corresponding rubber wheel grounding pressure is as follows: 0.726MPa, and the grounding pressure close to the actual automobile rubber wheel is 0.7 MPa.
It should be noted that, the ground contact areas of different tread rubbers under the same load are almost the same, so the ground contact pressure is almost the same, and thus the weight used for simulating the actual ground contact pressure of the rubber wheel of each rubber is fixed in mass. Although the preset load in step S1 is 6kg in this embodiment, the specific magnitude of the preset load needs to be determined according to the magnitude of the parameters such as L1 and L2.
In practice, the first rotational speed in step S1 is calculated from the running speed to be tested. Under the preset load, the rotating speed of the motor can not only accord with the unit time grounding frequency of an actual car, but also collect certain suspended particles. Too low can not collect sufficient suspended particles of rotational speed, and the rotational speed is too high, and the load is too little, and the machine can not accept, can be because vibrations are too big, and the weight is too little, shakes one section weight of crossbeam.
We simulate a real automobile V1Travelling on a road at a speed of 60km/h, i.e. the speed V to be tested160km/h, the grounding frequency of the rubber wheel is equal to that of the rubber wheel of the automobile, and the parameters comprise:
the actual automobile rubber wheel specification: d1205 × 0.55 × 2+16 × 25.4 × 639.1mm (diameter of 205/55R16 rubber wheel);
angular velocity of actual rubber wheel: omega1＝2V1/D1；
Diameter of the rubber wheel: d2＝130(mm)，
Angular velocity of rubber wheel: omega2＝ω1；
Linear velocity of rubber wheel: v2＝ω2*D2/2
Diameter of the grinding wheel: d3＝200(mm)；
Linear velocity V of grinding wheel3＝V2；
The rotation speed of the motor is equal to the rotation speed n of the grinding wheel is equal to V3/(π*D3)＝V1*D2/(π*D3*D1)；
The motor drives the grinding wheel to rotate, so that the corresponding motor rotating speed 364prm is simulated when the actual automobile runs at the speed of 60 km/h.
The diameter of the rubber wheel and the diameter of the grinding wheel can be set according to experimental requirements, and the invention does not need to do so. When the diameter of the rubber wheel and the diameter of the grinding wheel are changed, the corresponding motor rotating speed is also changed. The running speed to be tested may be set by itself, and is generally 45km/h to 75 km/h.
The preset value of the revolution number of the rubber wheel in the step S1 is 50000-70000 revolutions, preferably 60000 revolutions. Because the invention simulates the actual automobile to run on the road surface, the actual automobile runs on the road in a straight line, the transverse traction force is relatively small, the friction is small, the temperature rises after long-time running, but the surface of the rubber wheel does not generate the sticking phenomenon. In the experiment, the motor and the grinding wheel are connected together to form the driving wheel, the rubber wheel is the driven wheel, the rubber wheel performs circular motion on the grinding wheel, the transverse traction force is large, the work is more, the heat generation is more, the experiment is performed for a long time, the running revolution number is too many, the phenomenon that the surface of the rubber wheel is sticky after the experiment is finished is serious, and the rubbing, rolling and agglomeration of the ground particles are generated on the surface of the rubber wheel. However, the rubber wheel has too short running time and too few running revolutions, so that the rubber wheel is troublesome to replace frequently, the time is wasted, and on the other hand, the rubber wheel is replaced without using too much, and the energy and resource waste phenomenon is serious. Numerous studies have shown that the bias rubber wheel works properly and ensures sufficient durability of the rubber wheel-the maximum temperature is typically 1.1 ℃ and the radial rubber wheel must be limited to temperatures within 93.3 ℃ or lower. Experiments show that when the rubber wheel is driven by a motor with a load of 6kg and a rotation speed of 364rpm, the rubber wheel is best to be replaced when the vehicle runs for about 60000 turns, the rubber wheel is easy to generate a severe sticky phenomenon when the vehicle runs for more than 60000 turns, and energy is wasted when the vehicle runs for less than 60000 turns. It should be noted that when the rotation speed of the motor changes, the rotation speed of the corresponding rubber wheel also changes.
In step S2, a multi-stage collision collection sampler may be used to collect the particulate matter.
In step S3, a balance of ten thousandth may be used to weigh and record the mass M of the rubber wheel after the abrasion operation, and the mass M of the rubber wheel before the abrasion operation is obtained, and the abrasion value is recorded as M-M; and/or
Weighing the mass w of the aluminum foil in the micropore uniform deposition type collision sampler after the abrasion operation by using a one-hundred-thousand balance; the mass W of the aluminum foil before the abrasion operation was obtained and the emission value was recorded as W-W.
In specific implementation, if too few rubber wheels (for example, 3 or 4 rubber wheels) are selected, the generated suspendable particles are relatively few, the suspendable particles collected into the multistage collision collection sampler are less, and the error of the balance in weighing mass is relatively large; if too many rubber wheels (such as 15 rubber wheels) are selected, more suspended particles are generated, the particles are collected to the first layer tower of the multistage collision collection sampler to collect 10-18 mu m and the particles collected to the second layer tower to collect 5.6-10 mu m, and one aluminum foil cannot collect all the particles, so that the experimental result is inaccurate. In this embodiment, the number of the rubber wheels is 5 to 14, preferably 10. The particles collected by ten rubber wheels in the test cover about two thirds of the area of the aluminum foil on each layer of tower, so that the collection and weighing results are more accurate. Repeating the steps S1 and S2 until the rubber tire abrasion operation with the preset quantity value is completed, and then proceeding to the step S3, wherein the preset quantity value is 5-14.
By adopting the method for detecting the abrasion of the fine particles of the tread rubber composite material, the abrasion values and the emission values of rubber wheels with different formulas can be detected, and the emission values can represent the contribution of the rubber wheels to PM 2.5.
The following provides a method for detecting the abrasion of fine particles of the tread rubber composite material, which comprises the following steps:
101. weighing ten vulcanized rubber wheels by using a ten-thousandth balance, and respectively recording the masses of the ten rubber wheels as M1, M2, M3, M4 and M5 … … M10;
102. weighing the mass of the tensioned aluminum foil by a one-hundred-thousand balance, respectively marking as W1, W2 and W3 … … W, and sequentially placing the weighed mass in a multistage collision sampler from top to bottom in a grading tower;
103. selecting a grinding wheel of 160 meshes of white corundum, mounting a rubber wheel, and using the inner surface as a friction surface to be in contact with the rubber wheel;
104. opening the air heater, and keeping the air temperature in the closed space stable;
105. a load is applied to the rubber wheel and the motor speed and the number of rubber wheel revolutions are set.
In the embodiment, one end of the beam is provided with a 6kg weight, the rotating speed of the motor is set to 364prm through a control panel on the abrasion machine, and the rotating speed of the rubber wheel is set to 60000;
106. opening a multi-stage collision collection sampler and a vacuum pump, and adjusting the upper-stage pressure intensity of the vacuum pump to about 22 MPa; the lower-level pressure intensity is adjusted to about 62.5 MPa;
107. opening a first valve and a motor start button, starting abrasion operation, and changing a next rubber wheel after 60000 turns off;
ten rubber wheels are worn, relatively many suspended particles are collected, and the experimental reliability is increased.
108. After all ten rubber wheels are worn for 600000 (245 km), turning off the wearing machine, and turning off the vacuum pump and the multistage collision collection sampler switch after 4 minutes;
109. the mass of 10 rubber wheels is weighed and recorded by a one-ten-thousandth balance, wherein the mass of the rubber wheels is m1, m2, m3, m4, m5 … … m10, and the mass of eleven aluminum foils is w1, w2 and w3 … … w respectively;
110. calculating the mass difference M-M before and after each rubber wheel experiment, and recording as the abrasion value; and calculating the mass difference W-W before and after eleven aluminum foil experiments, and recording as the emission value.
The experiments of the above procedure were carried out after vulcanizing rubber compounds of different formulations into rubber wheels.
The invention provides a device and a method for detecting the abrasion of fine particles of tread rubber composite materials, which can detect the abrasion of the fine particles of the tread rubber composite materials with different components. The method can detect the discharge amount of tread rubber with different formulas, and researches on the types of different fillers, different filler proportions and the rubber made from different rubber matrixes to determine the low discharge amount through experimental representation, so as to guide the actual production, reduce the discharge amount of tires and have positive significance for reducing PM2.5 indexes.
While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, those skilled in the art will appreciate that various modifications can be made to the present invention without departing from the scope and spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (10)
1. The utility model provides a detection apparatus of tread rubber combined material tiny particle wearing and tearing which characterized in that includes:
the sealing case is internally provided with a rubber wheel fixing frame for mounting a rubber wheel;
the grinding wheel is positioned in the sealed case and can drive the rubber wheel arranged on the rubber wheel fixing frame to rotate;
the motor is positioned at the bottom of the sealed case, and a transmission shaft of the motor is connected with the grinding wheel;
the load applying assembly is connected with the rubber wheel fixing frame and is used for applying load to the rubber wheel;
and the multi-stage collision collection sampler is communicated with the inside of the sealed case through a first hose.
2. The apparatus for detecting the abrasion of the fine particles in the tread rubber composite material according to claim 1, wherein the grinding wheel is a 160-mesh white corundum grinding wheel.
3. The apparatus for detecting the abrasion of the fine particles in the tread rubber composite material as claimed in claim 1, wherein the rubber wheel holder comprises a bracket fixed in the density case, a key connected with the bracket, a first baffle plate and a second baffle plate.
4. The apparatus for detecting the wear of fine particles in a tread rubber composite according to claim 1, wherein the load applying member includes a beam connected to the rubber wheel holder and a weight mounted on an end of the beam.
5. The apparatus for detecting the wear of fine particles in tread rubber composite according to claim 1, wherein the apparatus for detecting the wear of fine particles in tread rubber composite comprises a gas collecting unit, and the gas collecting unit is communicated with the inside of the sealed case through a second hose.
6. A method for detecting the abrasion of fine particles of a tread rubber composite material is characterized by comprising the following steps:
s1, applying a preset load to the rubber wheel to be tested, setting the rotating speed of the motor as a first rotating speed, and setting the rotating speed of the rubber wheel as a preset value; the motor is connected with a grinding wheel, and the grinding wheel is in contact with the rubber wheel to be tested and can drive the rubber wheel to be tested to rotate;
s2, carrying out abrasion operation on the rubber wheel to be detected, and collecting suspended particles in the abrasion operation process;
and S3, calculating the wear value and/or the discharge value of the rubber wheel to be measured.
7. The method for detecting the abrasion of the fine particles in the tread rubber composite material as claimed in claim 6, wherein the preset load is calculated according to an actual grounding pressure and a load-pressure curve of an automobile.
8. The method for detecting the abrasion of the fine particles in the tread rubber composite material as claimed in claim 6, wherein the rotation speed n of the grinding wheel is V1*D2/(π*D3*D1) (ii) a Wherein, V1For the running speed to be tested, D1For the actual specification of rubber wheels for automobiles D2Is the diameter of the rubber wheel, D3Is the diameter of the grinding wheel; wherein, V1Taken from any value of 45 km/h-75 km/h.
9. The method for detecting the abrasion of the fine particles in the tread rubber composite material according to claim 6, wherein the step S3 comprises:
weighing and recording the mass M of the rubber wheel after the abrasion operation by a one-ten-thousandth balance, obtaining the mass M of the rubber wheel before the abrasion operation, and recording the abrasion value as M-M; and/or
Weighing the mass w of the aluminum foil in the micropore uniform deposition type collision sampler after the abrasion operation by using a one-hundred-thousand balance; the mass W of the aluminum foil before the abrasion operation was obtained and the emission value was recorded as W-W.
10. The method for detecting the abrasion of the fine particles in the tread rubber composite material as claimed in claim 6, wherein the steps S1 and S2 are repeated until the abrasion operation of the rubber tire with a predetermined amount of abrasion is completed, and then the step S3 is proceeded, wherein the predetermined amount is 5-14.
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