CN115855714A - Abrasion testing device and method for high-speed high-load aircraft tire part rubber - Google Patents
Abrasion testing device and method for high-speed high-load aircraft tire part rubber Download PDFInfo
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Abstract
The invention relates to a device and a method for testing abrasion of high-speed high-load aircraft tire part rubber, and belongs to the cross technical field of mechanics, materials and tribology. The method solves the problems that the method for testing the abrasion performance of the tire and the rubber part of the tire in the prior art is quite different from the actual working condition of an aviation tire, the price of related equipment is high, the feedback period of experimental data is long, the testing cost is high, and the whole tire is required to be used as a test sample tire to cause a plurality of limitations. The invention relates to a high-speed high-load aircraft tire part rubber abrasion testing device, which comprises: the grinding wheel assembly comprises a shell, a loading system, a high-speed shaft assembly, a connecting assembly, a pair of grinding wheel assemblies and a control system. The abrasion testing device and the abrasion testing method for the high-speed high-load aircraft tire part rubber have the advantages of high cost performance, simplicity and convenience in operation, stability in operation, good data reproducibility and short feedback period, and can be effectively used for researching the abrasion performance of the aircraft tire part rubber.
Description
Technical Field
The invention belongs to the technical field of intersection of mechanics, materials and tribology, and particularly relates to a device and a method for testing abrasion of high-speed high-load aircraft tire part rubber.
Background
The abrasion performance is an important index of an aircraft tire, and the functions of takeoff, landing, sliding and the like of an airplane are realized through the friction action between the tire and the ground; wear is the main cause of tire failure, and is related to the service life of the tire and the safety of the airplane. Statistical data indicate that more than 80% of aviation tires are scrapped due to tire wear. Therefore, it is necessary to research the wear behavior of the aircraft tire and the rubber material of the part of the aircraft tire.
In the prior art, the research modes of the abrasion performance of tires and rubber parts thereof mainly include two types: one is the wear performance research of rubber formula materials in laboratory stage, such as the commonly used AKRON abrasion (GB/T1689), DIN abrasion (GB/T9867), LAT100 abrasion (GB/T40797) and other testing devices and methods. The methods are simple to operate, good in data repeatability and quick in feedback, and can be used for qualitatively and quantitatively comparing the wear performance of the rubber material, but the test parameters are far away from the actual working condition of the aircraft tire, and the equivalent relation between the test parameters and the actual working condition of the aircraft tire is difficult to establish. The other is a drum bench test. The united states MTS corporation first developed and commercialized a series of tire drum stands (CN 105452837 a), and japan international measuring corporation developed drum surfaces of materials (CN 110998274 a) that can simulate actual road conditions, and based on this, developed a long distance horizontally placed road surface (CN 112041652A) that can be replaced as required to further simulate the actual working conditions of tire operation. There is a patent publication related to a tire testing device in China (CN 110231182 a), but the drum is also used as a prototype, and data of tire wear is monitored in real time only by a three-dimensional laser scanning method. The drum test bench test is an evaluation method closer to the actual working condition, but has a considerable difference with the actual working condition of an aircraft tire, the price of related equipment is high, the feedback period of experimental data is long, the test cost is high, especially, the whole tire is required to be used as a test sample tire, the manufacturing chain of the tire industry is involved, and the drum test bench test is quite tedious and time-consuming.
Aiming at the defects of the prior art, it is necessary to develop a device and a method for testing the abrasion of the aircraft tire part rubber, which have the advantages of high cost performance, simple and convenient operation, good data repeatability, high precision and timely feedback and can basically simulate the actual working conditions.
Disclosure of Invention
The invention provides a high-speed high-load aviation tire part rubber abrasion testing device and a testing method, aiming at solving the problems that in the prior art, a testing method for tire and part rubber abrasion performance of the tire is quite different from the actual working condition of an aviation tire, related equipment is high in price, the feedback period of experimental data is long, the testing cost is high, and the whole tire is required to be used as a testing sample tire to cause a plurality of limitations.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the invention relates to a high-speed high-load aircraft tire part rubber abrasion testing device, which comprises: the device comprises a shell, a loading system, a high-speed shaft assembly, a connecting assembly, a grinding wheel assembly and a control system;
the loading system comprises a speed reducing motor, a machine cylinder and a first installation angle plate: the speed reduction motor is fixedly connected with one end of the machine cylinder, the other end of the machine cylinder is fixedly connected with one end of the floating joint, the machine cylinder is fixed on a first installation angle plate, and the first installation angle plate is fixed on the inner wall of the shell;
the high-speed shaft assembly comprises a first motor, a first coupler, a high-speed shaft assembly, a high-speed mounting plate, a shaft clamp, a sample wheel tool and a linear slide rail; the high-speed shaft part is fixedly connected with a sample wheel tool through a shaft clamp, the sample wheel tool is used for fixing a rubber coated sample wheel to be tested, the upper part of the high-speed shaft part is fixed on a high-speed mounting plate, the high-speed mounting plate is fixed on a slide block of a linear slide rail, and the linear slide rail is fixed on the inner wall of the shell;
the connecting assembly comprises a floating joint, a mechanical sensor base, two bolts and two pressure springs, one end of the floating joint is fixedly connected with the machine cylinder, one end of the mechanical sensor is fixedly connected with the other end of the floating joint, the other end of the mechanical sensor is fixedly connected with the mechanical sensor base, one ends of the two bolts are inserted into the two through holes of the high-speed mounting plate, the other end of the two bolts is fixedly connected with the mechanical sensor base, the two pressure springs are respectively sleeved on the two bolts, one end of each pressure spring is fixedly connected with the mechanical sensor base, the other end of each pressure spring is fixedly connected with the side wall of the high-speed mounting plate, the mechanical sensor is parallel to the central shafts of the two bolts, and the mechanical sensor base pushes the high-speed mounting plate to move along a linear sliding rail in the horizontal direction through the pressure springs under the guidance of the bolts;
the grinding wheel aligning assembly comprises a second motor, a speed reducer, a second coupler, a second mounting angle plate, a mounting back plate, a third mounting angle plate, a spindle box and a sand paper-coated grinding wheel; one end of a second motor is connected with one end of a speed reducer, the other end of the speed reducer is connected with one end of a main shaft box through a second coupler, the other end of the main shaft box is connected with a sand-coated paper pair grinding wheel, the speed reducer is fixed on a second installation angle plate, the second installation angle plate and a third installation angle plate are both fixed on an installation back plate, and the third installation angle plate is fixedly connected with the inner wall of the shell; the abrasive paper-coated abrasive paper pair grinding wheel is a pair grinding wheel with the surface adhered with adhesive-backed abrasive paper;
the rubber-coated sample wheel on the sample wheel tool and the sand-coated paper of the grinding wheel assembly are positioned on the same horizontal line with the grinding wheel;
the control system is connected with the first motor, the speed reducing motor, the second motor and the mechanical sensor, the control system drives the high-speed shaft assembly to move on the linear slide rail by controlling the speed reducing motor, so that the rubber-coated sample wheel on the sample wheel tool is horizontally and positively contacted with the abrasive paper facing the abrasive wheel assembly, the first motor and the second motor are controlled to respectively control the load, the rotating speed and the number of turns of the rubber-coated sample wheel and the abrasive paper facing the abrasive wheel, the mechanical sensor collects force signals and transmits the force signals to the control system, and when the deviation of the fed-back loading force and the preset value is greater than +/-5%, the control system adjusts the load of the rubber-coated sample wheel by controlling the speed reducing motor.
Further, the high-speed shaft part comprises a locking cap, a spacer bush, a first flange, a deep groove ball bearing, a bearing bush, a shaft sleeve, a second flange and a high-speed shaft; the bearing sleeve and the shaft sleeve are sequentially sleeved on the outer side of the middle part of the high-speed shaft, deep groove ball bearings are arranged at the contact part of the bearing sleeve and the top part and the contact part of the bearing sleeve and the bottom part of the shaft sleeve respectively, the first flange is fixed on the lower end surface of the shaft sleeve through screws, a spacer sleeve is arranged between the first flange and the high-speed shaft, the high-speed mounting plate is fixed on the upper part of the shaft sleeve, and the second flange is fixedly connected with the high-speed shaft and fixed on the upper surface of the high-speed mounting plate through screws;
a connecting guard plate is arranged outside the first coupler, the first flange is fixedly connected with the connecting guard plate, and a locking cap is arranged between the connecting guard plate and the high-speed shaft.
Further, the casing includes frame, guard plate and transparent protection casing, and the guard plate is fixed on the frame, constitutes and seals the box, and the top of box is equipped with the opening, and transparent protection casing is fixed on the opening of box.
Furthermore, the testing device further comprises a control panel, the control panel is connected with the control system, the control system is controlled through the control panel, and the control panel is fixed on the outer surface of the shell.
Furthermore, the highest loading load of the loading system is 100 kilograms, the measurement precision is 1 percent, and the loading precision is < + > -3 percent.
Further, the preparation method of the rubber-coated sample wheel comprises the following steps: and coating the adhesive tape on the surface of the sample wheel along the circumferential direction, then putting the sample wheel into a mould, and vulcanizing and molding to form the rubber-coated sample wheel.
Further, the sample wheel is a metal wheel with a size of phi outer diameter
The inner diameter is 32mm x the width of W is 24mm.
Furthermore, the circumferential surface of the sample wheel is of an array groove-shaped structure.
Furthermore, the groove size of the sample wheel is 3mm long, 2mm deep and 10mm pitch.
Furthermore, the coating thickness of the coating sample wheel is 6mm.
Further, the rated rotating speed of the rubber-coated sample wheel is 1800rpm.
Further, the pair of grinding wheels are metal wheels, and the size of the pair of grinding wheels is phi outer diameter
The inner diameter is 32mm x the width of W is 32mm.
Further, the adhesive coated abrasive paper of the coated abrasive paper to the grinding wheel is 60-240 meshes.
Further, the rated rotating speed of the coated abrasive paper to the grinding wheel is 500rpm.
The invention also provides a method for testing the abrasion of the rubber at the part of the aircraft tire by using the testing device, which comprises the following steps:
step one, weighing a rubber-coated sample wheel to be tested;
step two, respectively installing a rubber-coated sample wheel to be tested and a sand-coated paper pair grinding wheel on a high-speed shaft assembly and a pair grinding wheel assembly of the testing device;
setting the load of a loading system, the rotating speed of a rubber-coated sample wheel, the number of turns of the rubber-coated sample wheel, the rotating speed of abrasive paper to the abrasive wheel and the number of turns of the rubber-coated sample wheel through a control system;
step four, starting loading, and starting operation after the load is stable;
and fifthly, after the test is finished, unloading the rubber-coated sample wheel to be tested, weighing, and calculating to obtain the abrasion of the rubber at the aircraft tire part.
The working principle of the high-speed high-load aviation tire part rubber abrasion testing device is as follows: the load generated by the loading system is transferred to the high-speed shaft assembly through the floating joint, the mechanical sensor base and the pressure spring, and the high-speed shaft assembly is pushed to horizontally move along the linear sliding rail (rightward), so that the rubber-coated sample wheel on the test piece tool and the sand-coated paper at the top end of the high-speed shaft assembly are horizontally and positively contacted with the grinding wheel; after the preset load value is reached, starting a first motor and a second motor to enable the rubber-coated sample wheel and the sand-coated paper to rotate the grinding wheel at a preset rotating speed; in the process, a mechanical sensor collects a force signal and transmits the force signal to a control system, and the control system adjusts the load of the rubber-coated sample wheel by controlling a speed reduction motor according to the force signal; when the revolution (or test time) of the rubber-coated sample wheel reaches a preset value, stopping the test, and unloading the high-speed shaft assembly; and the weight difference before and after the rubber coating sample wheel test is the abrasion value of the rubber at the aircraft tire part.
Compared with the prior art, the invention has the beneficial effects that:
according to the device and the method for testing the abrasion of the rubber at the high-speed high-load aircraft tire part, the rubber-coated sample wheel and the abrasive paper are horizontally contacted with the grinding wheel, so that abrasive dust generated in the friction process is quickly removed from the surface of the grinding wheel by the abrasive paper under the action of gravity and centrifugal force, and experimental errors caused by the fact that the abrasive dust is brought into a friction interface are eliminated; the design of the floating joint and the pressure spring is adopted to load the sample, so that the vibration generated in the friction process is avoided, and the running stability of the equipment is improved; the mechanical sensor is used as a part of the force transmission assembly, can monitor and feed back the force in the sample process in real time, and improves the loading precision (the loading force error is less than or equal to 3%); the parameters such as specific pressure, speed, temperature rise, slip-roll ratio and the like in the test process are close to the actual working condition of the aircraft tire, and the simulation of the actual working condition of the aircraft tire can be basically realized.
According to the device and the method for testing the abrasion of the rubber at the high-speed high-load aircraft tire part, the abrasive paper coated on the grinding wheel is formed by sticking the abrasive paper coated with the gum on the surface of the grinding wheel, so that the problem of inaccurate data caused by the adhesion of the rubber material on the surface of the grinding wheel by a common grinding wheel is solved, and the simulation of road surfaces with different roughness is realized by adjusting the mesh number of the abrasive paper.
The abrasion testing device and the abrasion testing method for the high-speed high-load aircraft tire part rubber have the advantages of high cost performance, simplicity and convenience in operation, stability in operation, good data reproducibility and short feedback period, and can be effectively used for researching the abrasion performance of the aircraft tire part rubber. The detection proves that the testing device can stably operate under the conditions of the specific pressure of 2.0MPa, the linear speed of 13.2m/s and the friction temperature rise of more than 200 ℃.
In addition, the abrasion testing device and the testing method for the high-speed high-load aircraft tire part rubber can realize that the part rubber and the sample wheel are prepared into the rubber-coated sample wheel through a vulcanization process integrated molding technology through the structural design of the array groove on the circumferential surface of the rubber-coated sample wheel, and solve the problems that the treatment process for preparing the rubber-coated sample wheel by adhering the vulcanization rubber strip to the surface of the sample wheel by using an adhesive is complex and time-consuming, the rubber strip has seams and the like.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a rubber abrasion testing device for a high-speed high-load aircraft tire part according to the invention;
figure 2 is a schematic structural view of a wear test apparatus loading system of the present invention, with the top view being a front view and the bottom view being a top view;
FIG. 3 is a schematic structural view of a high-speed shaft assembly of the abrasion testing device of the present invention, wherein the left side is a front view and the right side is a top view;
FIG. 4 is a schematic structural diagram of a sample wheel and a rubber-coated sample wheel of the abrasion testing device of the present invention;
FIG. 5 is a schematic structural view of a connection assembly of the wear testing apparatus of the present invention;
FIG. 6 is a schematic view of the abrasion wheel assembly of the abrasion testing device of the present invention, with the left view being a front view and the right view being a top view;
FIG. 7 is a comparison of the abrasive paper to the grinding wheel and the grinding wheel to the grinding wheel of the abrasion testing device of the present invention;
FIG. 8 is a graph of load over time during the testing of examples 1 and 2 of the wear test apparatus of the present invention;
FIG. 9 is a graph of the relationship between the rubber wear of the aircraft tire part and the load, speed, distance, and mesh number of sandpaper measured by the abrasion test device in example 1 of the present invention;
FIG. 10 is a graph of the temperature of the aircraft tire part rubber friction surface as a function of time at different loads, speeds, and distances for abrasion testing apparatus example 2 of the present invention;
FIG. 11 is a graph comparing the wear data obtained on a DIN abrasion tester and the apparatus for two aircraft tire location adhesives of example 3 in accordance with the invention;
in the figure, 1, a housing; 2. 2-1 parts of a loading system, 2-1 parts of a speed reducing motor, 2-2 parts of a machine cylinder, 2-3 parts of a first installation angle plate; 3. 3-1 of a high-speed shaft assembly, 3-2 of a first motor, 3-3 of a first coupler, 3-4 of a connecting protection plate, 3-5 of a locking cap, 3-5 of a spacer bush, 3-6 of a first flange, 3-7 of a deep groove ball bearing, 3-8 of a bearing bush, 3-9 of a shaft sleeve, 3-10 of a high-speed mounting plate, 3-11 of a second flange, 3-12 of a high-speed shaft, 3-13 of a shaft clamp, 3-14 of a sample wheel tool, 3-15 of a linear sliding rail, 4 of a connecting assembly, 4-1 of a floating joint, 4-2 of a nut, 4-3 of a mechanical sensor, 4-4 of a mechanical sensor base, 4-5 of an inner hexagon screw, 4-6 of a bolt and 4-7 of a pressure spring; 5. 5-1 parts of a grinding wheel pair assembly, 5-2 parts of a second motor, 5-3 parts of a speed reducer, 5-4 parts of a second coupling, 5-5 parts of a second installation angle plate, 5-6 parts of an installation back plate, 5-7 parts of a third installation angle plate, 5-8 parts of a spindle box and 5-8 parts of a sand-coated paper pair grinding wheel.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention, but it is to be understood that the description is intended to illustrate further features and advantages of the invention, and not to limit the scope of the claims.
As shown in fig. 1 to 7, the device for testing rubber wear of a high-speed high-load aircraft tire part of the invention comprises: the device comprises a shell 1, a loading system 2, a high-speed shaft assembly 3, a connecting assembly 4, a grinding wheel pair assembly 5 and a control system;
wherein, casing 1 includes frame, guard plate and transparent protection casing, and the guard plate is fixed on the frame, constitutes and seals the box, and the top of box is equipped with the opening, and transparent protection casing is fixed on the opening of box, and loading system 2, high-speed shaft subassembly 3, coupling assembling 4 and set up in the box to emery wheel subassembly 5.
The loading system 2 comprises a speed reducing motor 2-1, a machine cylinder 2-2 and a first installation angle plate 2-3: the speed reducing motor 2-1 is fixedly connected with one end of the machine cylinder 2-2, the other end of the machine cylinder 2-2 is fixedly connected with one end of the floating joint 4-1 of the connecting component 4, the machine cylinder 2-2 is fixed on the first installation angle plate 2-3, and the first installation angle plate 2-3 is fixed on the inner wall of the shell 1. The highest loading load of the loading system 2 is preferably 100 kg, the measurement precision is 1%, and the loading precision is < + > -3%.
The high-speed shaft assembly 3 comprises a first motor 3-1, a first coupler 3-2, a connecting guard plate 3-3, a high-speed shaft assembly, a high-speed mounting plate 3-10, a shaft clamp 3-13, a sample wheel tool 3-14 and a linear slide rail 3-15; the high-speed shaft part comprises 3-4 parts of locking caps, 3-5 parts of spacer bushes, 3-6 parts of first flanges, 3-7 parts of deep groove ball bearings, 3-8 parts of bearing bushes, 3-9 parts of shaft sleeves, 3-11 parts of second flanges and 3-12 parts of high-speed shafts; the first motor 3-1 is connected with one end of the high-speed shaft 3-12 through the first coupler 3-2, and the other end of the high-speed shaft 3-12 is fixedly connected with the sample wheel tool 3-14; the bearing sleeves 3-8 and the shaft sleeves 3-9 are sequentially sleeved on the outer side of the middle parts of the high-speed shafts 3-12, deep groove ball bearings 3-7 are arranged at the contact parts of the top parts and the bottom parts of the bearing sleeves 3-8 and the shaft sleeves 3-9, the first flanges 3-6 are fixed on the lower end surfaces of the shaft sleeves 3-9 through screws, spacer sleeves 3-5 are arranged between the first flanges 3-6 and the high-speed shafts 3-12, the high-speed mounting plates 3-10 are fixed on the upper parts of the shaft sleeves 3-9, and the second flanges 3-11 are fixedly connected with the high-speed shaft parts and fixed on the upper surfaces of the high-speed mounting plates 3-10 through screws; the high-speed mounting plate 3-10 is fixedly connected with a slide block of the linear slide rail 3-15, and the top end of the high-speed shaft 3-12 is fixedly connected with the sample wheel tool 3-14 through a shaft clamp 3-13. The sample wheel tool 3-14 is used for fixing a rubber-coated sample wheel to be tested, a linear slide rail 3-15 andthe shell 1 is fixedly connected; a connecting guard plate 3-3 is arranged outside the first coupler 3-2, a first flange 3-6 is fixedly connected with the connecting guard plate 3-3, and a locking cap 3-4 is arranged between the connecting guard plate 3-3 and the high-speed shaft 3-12. The preparation method of the rubber-coated sample wheel comprises the following steps: and coating the adhesive tape on the surface of the sample wheel along the circumferential direction, then putting the rubber-coated sample wheel into a mould, and vulcanizing and molding to form the rubber-coated sample wheel. Preferably, the rated rotating speed of the rubber-coated sample wheel is 1800rpm; the sample wheel is a metal wheel with the size phi (external diameter)
(inner diameter) 32mm. Times.W (width) 24mm; the circumferential surface of the sample wheel is of an array groove-shaped structure, and the grooving direction of the groove structure is axial; the groove size of the sample wheel is 3mm long, 2mm deep and 10mm pitch; the coating thickness of the coating sample wheel is 6mm.
The connecting component comprises a floating joint 4-1, a mechanical sensor 4-3, a mechanical sensor base 4-4, two bolts 4-6 and two pressure springs 4-7, one end of the floating joint 4-1 is fixedly connected with a machine cylinder 2-2, one end of the mechanical sensor 4-3 is fixedly connected with the other end of the floating joint 4-1 through a nut 4-2, three parallel through holes are arranged on the mechanical sensor base 4-4, the other end of the mechanical sensor 4-3 is fixedly connected with the mechanical sensor base 4-4 through an inner hexagon screw 4-5 penetrating through the middle through hole, one end of each of the two bolts 4-6 is fixedly connected with the mechanical sensor base 4-4, the other end of each of the two bolts penetrates through the other two through holes in the mechanical sensor base 4-4 and is inserted into the two through holes in the side wall of the high-speed mounting plate 3-10, the two compression springs 4-7 are respectively sleeved on the two bolts 4-6, one end of each of the two compression springs is fixedly connected with the mechanical sensor base 4-4, the other end of each of the two compression springs is fixedly connected with the side wall of the high-speed mounting plate 3-10, and the mechanical sensor base 4-4 pushes the high-speed mounting plate 3-10 to move along the linear sliding rail 3-15 in the horizontal direction through the compression springs 4-7 under the guidance of the bolts 4-6.
The grinding wheel aligning component 5 comprises a second motor 5-1, a speed reducer 5-2, a second coupler 5-3, a second installation angle plate 5-4, an installation back plate 5-5, a third installation angle plate 5-6, a spindle box 5-7 and a sand-coated paper grinding wheel aligning wheel 5-8; one end of a second motor 5-1 is connected with one end of a speed reducer 5-2, and the other end of the speed reducer 5-2 is connected with one end of a spindle box 5-7 through a connecting rodThe other end of the spindle box 5-7 is connected with a sand-coated paper counter-grinding wheel 5-8, a speed reducer 5-2 is fixed on a second installation angle plate 5-4, the second installation angle plate 5-4 and a third installation angle plate 5-6 are fixed on an installation back plate 5-5, and the third installation angle plate 5-6 is fixedly connected with the inner wall of the shell 1; the sand paper covering pair grinding wheel is a pair grinding wheel with gum sand paper adhered to the surface, and the mesh number of the gum sand paper can be adjusted according to the requirement. Preferably, the coated abrasive paper has a nominal speed of 500rpm for the grinding wheel, a metal wheel for the grinding wheel, and a dimension of phi (outside diameter)
(inner diameter) 32mm. Times.W (width) 32mm.
The control system is connected with the first motor 3-1, the speed reducing motor 2-1, the second motor 5-1 and the mechanical sensor 4-3, the control system pushes the high-speed shaft assembly 3 to move on the linear slide rail 3-15 by controlling the speed reducing motor 2-1, so that the glue-coated sample wheel on the sample wheel tool 3-14 is in horizontal forward contact with the abrasive paper facing the abrasive wheel assembly 5 to 8, the load, the rotating speed and the number of turns of the glue-coated sample wheel and the abrasive paper facing the abrasive wheel 5-8 are respectively controlled by controlling the first motor 3-1 and the second motor 5-1, the mechanical sensor 4-3 collects a force signal and transmits the force signal to the control system, and when the fed back loading force deviates from a preset value (+/-5%), the control system adjusts the load of the glue-coated sample wheel by controlling the speed reducing motor 2-1.
In the invention, the force generated by a loading system 2 is transmitted to a high-speed shaft assembly 3 through a floating joint 4-1, a nut 4-2, a mechanical sensor 4-3, a mechanical sensor base 4-4 and a pressure spring 4-7, and the high-speed shaft assembly 3 moves along the horizontal direction through the sliding connection of a high-speed mounting plate 3-10 and a bolt 4-6; the rubber-coated sample wheel on the sample wheel tool 3-14 is horizontally and positively contacted with the sand-coated paper on the top end of the grinding wheel assembly 5 to the grinding wheel 5-8, namely, the central shaft of the rubber-coated sample wheel and the central shaft of the sand-coated paper are arranged in parallel and vertical to the ground, and perform same-direction or reverse circular motion. The design of the floating joint 4-1 and the pressure spring 4-7 ensures that the floating joint can effectively buffer the vibration which possibly occurs in the test process while transmitting the force; the mechanical sensor 4-3 can monitor and feed back the loading force in real time in the test process, and when the deviation between the loading force and the preset value is large (plus or minus 5 percent), the operation program can control the loading system 2 to adjust the loading force in real time.
For convenient operation, the testing device can also comprise a control panel, the control panel is connected with the control system, the control system is controlled through buttons on the control panel, and the control panel is fixed on the outer surface of the shell.
In the invention, parameters such as load, rotating speed and the like in the test process can be digitally output.
The invention discloses a method for testing abrasion of rubber at an aircraft tire part, which comprises the following steps:
step one, weighing a rubber-coated sample wheel to be tested;
secondly, respectively mounting a to-be-tested glue-coated sample wheel and a pair of abrasive paper abrasive wheels on a high-speed shaft assembly 3 and a pair of abrasive wheel assemblies 5 of the testing device;
setting the load of a loading system, the rotating speed of a rubber-coated sample wheel, the number of turns of the rubber-coated sample wheel, the rotating speed of abrasive paper to the abrasive wheel and the number of turns of the rubber-coated sample wheel through a control system;
step four, starting loading, and starting operation after the load is stable;
and fifthly, after the test is finished, unloading the rubber coated sample wheel, and weighing to obtain the abrasion of the rubber at the aircraft tire part.
In the following examples, various procedures and methods not described in detail are conventional methods well known in the art. Materials, devices, apparatuses, and the like used in the following examples are commercially available unless otherwise specified.
Example 1
The device operating parameters were set as follows:
the first condition is as follows: the load =10-50kg, the rotating speed of a rubber-coated sample wheel is 500rpm, the rotating speed of a sand-coated counter-grinding wheel is 200rpm, the distance is 50m, and the mesh number of sand paper =240;
and a second condition: the load =50kg, the rotating speed of a rubber-coated sample wheel is 100-500rpm, the rotating speed of a sand-coated counter-grinding wheel is 200rpm, the distance is 50m, and the mesh number of sand paper =240;
and (3) carrying out a third condition: the load =50kg, the rotating speed of a rubber coating sample wheel is 500rpm, the rotating speed of a sand coating pair grinding wheel is 200rpm, the distance is 10-70m, and the mesh number of sand paper =240;
and a fourth condition: the load =30kg, the rotating speed of a rubber-coated sample wheel is 500rpm, the rotating speed of a sand-coated counter-grinding wheel is 200rpm, the distance is 30m, and the mesh number of sand paper =80-400;
coating the rubber sample wheel with the rubber material: patent 202011190520.5 a tread rubber using synthetic rubber as base rubber, and its preparation method and application in example 4, the rubber coating thickness is 6mm, the sample wheel is a metal wheel, and the size is phi (outside diameter)
(inner diameter) 32mm. Times.W (width) 24mm; the circumferential surface of the sample wheel is of an array groove-shaped structure, and the grooving direction of the groove structure is axial; the groove size of the sample wheel is 3mm long, 2mm deep and 10mm pitch; the grinding wheel is a metal wheel with the size phi (outer diameter)>
(inner diameter) 32mm. Times.W (width) 32mm.
Tests were conducted to examine the abrasion change of the aircraft tire part rubber under different load, speed, distance and sandpaper mesh conditions, and the results are shown in fig. 8 and 9.
Example 2
The device operating parameters were set as follows: sandpaper mesh =240
The first condition is as follows: the load =10-50kg, the rotating speed of the rubber-coated sample wheel is 500rpm, the rotating speed of the sand-coated sample wheel is 200rpm, and the distance is 30m;
and a second condition: the load is =30kg, the rotating speed of a rubber coating sample wheel is 100-500rpm, the rotating speed of a sand coating pair grinding wheel is 200rpm, and the distance is 30m;
and (3) performing a third condition: the load =50kg, the rotating speed of the rubber-coated sample wheel is 500rpm, the rotating speed of the sand-coated sample wheel is 200rpm, and the distance is 10-70m;
coating a rubber material on a rubber coated sample wheel: patent 202011190520.5 a tread rubber using synthetic rubber as base rubber, and its preparation method and application in example 4, the rubber coating thickness is 6mm, the sample wheel is a metal wheel, and the size is phi (outer diameter)
(inner diameter) 32mm. Times.W (width) 24mm; the circumferential surface of the sample wheel is of an array groove-shaped structure, and the grooving direction of the groove structure is axial; the groove size of the sample wheel is 3mm long, 2mm deep and 10mm pitch; the grinding wheel is a metal wheel with the size phi (outer diameter)>
(inner diameter) 32mm. Times.W (width) 32mm.
The test is carried out, the temperature rise of the friction surface is monitored and recorded in real time by using a thermal infrared imager, the change of the temperature of the rubber friction surface of the aircraft tire part along with time under different loads, speeds and distances is inspected, and the result is shown in fig. 8 and 10.
Example 3
Coating a rubber material on a rubber coated sample wheel: patent 202011190520.5 a tread rubber using synthetic rubber as base rubber, and its preparation method and application in examples 4 (rubber No. 2) and 5 (new formulation), the coating thickness is 6mm, the sample wheel is a metal wheel, and the size is phi (outside diameter)
(inner diameter) 32mm. Times.W (width) 24mm; the circumferential surface of the sample wheel is of an array groove-shaped structure, and the grooving direction of the groove structure is axial; the groove size of the sample wheel is 3mm long, 2mm deep and 10mm pitch; the grinding wheel is a metal wheel with the size phi (outer diameter)>
(inner diameter) 32mm. Times.W (width) 32mm. Abrasion tests and comparisons were performed on a DIN abrasion tester and the apparatus, respectively, and the results are shown in fig. 11.
The equipment operating parameters were as follows:
DIN abrasion tester:
the manufacturer: manufactured by shanghai corporation, type: AB-6111, load: 10-50N, drum rotation speed: 40rpm, stroke: 20m, sample depth protrusion holder distance: 6mm, and the other conditions are shown in GB/T9867-2008;
the device comprises:
the load =10-50kg, the rotational speed of the rubber-coated sample wheel 500rpm, the rotational speed of the sand-coated counter-grinding wheel 200rpm, the distance 30m, and the mesh number of the sandpaper =240.
Table 1 shows a comparison of the parameters of the device according to the invention with the DIN and AKRON methods customary for abrasion testing of rubber materials.
TABLE 1 comparison of the present apparatus with DIN and AKRON abrasion test method parameters
Therefore, the severity of the operation condition of the device is far higher than that of AKRON and DIN abrasion testing machines, and the device basically reaches the actual operation working condition of the aircraft tire in the aspects of load, temperature rise, linear speed, opposite grinding surface and the like.
The comparative data of the two formula rubbers on the DIN abrasion tester and the device in the figure 11 show that the device can better reflect the difference of the abrasion performance of the rubber with different formulas due to different severity of experimental conditions, has better discrimination and is more suitable for the abrasion performance characterization of the rubber at the aircraft tire part.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. High-speed high-load aircraft tire position is glued and is worn out testing arrangement, its characterized in that includes: the device comprises a shell (1), a loading system (2), a high-speed shaft assembly (3), a connecting assembly (4), a grinding wheel assembly (5) and a control system;
the loading system (2) comprises a speed reducing motor (2-1), a machine cylinder (2-2) and a first installation angle plate (2-3): the speed reducing motor (2-1) is fixedly connected with one end of the machine cylinder (2-2), the other end of the machine cylinder (2-2) is fixedly connected with one end of a floating joint (4-1) in the connecting component (4), the machine cylinder (2-2) is fixed on a first installation angle plate (2-3), and the first installation angle plate (2-3) is fixed on the inner wall of the shell (1);
the high-speed shaft assembly (3) comprises a first motor (3-1), a first coupler (3-2), a high-speed shaft assembly, a high-speed mounting plate (3-10), a shaft clamp (3-13), a sample wheel tool (3-14) and a linear slide rail (3-15): the test piece wheel tool comprises a first motor (3-1), a first coupler (3-2), a first shaft clamp (3-13), a first sample wheel tool (3-14), a first high-speed shaft (3-12) and a second high-speed shaft (3-1); the upper part of the high-speed shaft part is fixed on a high-speed mounting plate (3-10), the high-speed mounting plate (3-10) is fixed on a slide block of a linear slide rail (3-15), and the linear slide rail (3-15) is fixed on the inner wall of the shell (1);
the connecting component comprises a floating joint (4-1), a mechanical sensor (4-3), a mechanical sensor base (4-4), two bolts (4-6) and two pressure springs (4-7), one end of the floating joint (4-1) is fixedly connected with the machine cylinder (2-2), one end of the mechanical sensor (4-3) is fixedly connected with the other end of the floating joint (4-1), the other end of the mechanical sensor (4-3) is fixedly connected with the mechanical sensor base (4-4), one ends of the two bolts (4-6) are inserted into two through holes of the high-speed mounting plate (3-10), the other end is fixedly connected with a mechanical sensor base (4-4), two pressure springs (4-7) are respectively sleeved on two bolts (4-6), one end of the mechanical sensor base is fixedly connected with the mechanical sensor base (4-4), the other end of the mechanical sensor base is fixedly connected with the side wall of the high-speed mounting plate (3-10), the mechanical sensor (4-3) is parallel to the central axes of the two bolts (4-6), and the mechanical sensor base (4-4) pushes the high-speed mounting plate (3-10) to move in the horizontal direction along the linear sliding rail (3-15) through the pressure spring (4-7) under the guidance of the bolts (4-6);
the grinding wheel pair assembly comprises a second motor (5-1), a speed reducer (5-2), a second coupler (5-3), a second installation angle plate (5-4), an installation back plate (5-5), a third installation angle plate (5-6), a spindle box (5-7) and a sand-coated paper grinding wheel pair (5-8); one end of a second motor (5-1) is connected with one end of a speed reducer (5-2), the other end of the speed reducer (5-2) is connected with one end of a spindle box (5-7) through a second coupler (5-3), the other end of the spindle box (5-7) is connected with a coated abrasive paper grinding wheel pair (5-8), the speed reducer (5-2) is fixed on a second installation angle plate (5-4), the second installation angle plate (5-4) and a third installation angle plate (5-6) are fixed on an installation back plate (5-5), and the third installation angle plate (5-6) is fixedly connected with the inner wall of the shell (1); the abrasive paper-covered abrasive wheel is a pair of abrasive wheels with gum abrasive paper adhered on the surfaces;
the glue-coated sample wheel on the sample wheel tool (3-14) and the sand-coated paper pair grinding wheel (5-8) of the pair grinding wheel assembly are positioned on the same horizontal line;
the control system is connected with the first motor (3-1), the speed reducing motor (2-1), the second motor (5-1) and the mechanical sensor (4-3), the control system drives the high-speed shaft assembly (3) to move on the linear sliding rail (3-15) by controlling the speed reducing motor (2-1), so that the rubber-coated sample wheel on the sample wheel tool (3-14) is horizontally and positively contacted with the abrasive paper for the abrasive wheel assembly (5) to the abrasive wheel (5-8), the first motor (3-1) and the second motor (5-1) are controlled to respectively control the load, the rotating speed and the number of turns of the rubber-coated sample wheel and the abrasive paper for the abrasive wheel (5-8), the mechanical sensor (4-3) collects force signals and transmits the force signals to the control system, and when the deviation of the fed back loading force is larger than +/-5% of a preset value, the control system controls the speed reducing motor (2-1) to adjust the load of the rubber-coated sample wheel.
2. The high-speed high-load aviation tire part rubber wear testing device according to claim 1, wherein the high-speed shaft component comprises a locking cap (3-4), a spacer bush (3-5), a first flange (3-6), a deep groove ball bearing (3-7), a bearing bush (3-8), a shaft sleeve (3-9), a second flange (3-11) and a high-speed shaft (3-12); the bearing sleeve (3-8) and the shaft sleeve (3-9) are sequentially sleeved on the outer side of the middle part of the high-speed shaft (3-12), deep groove ball bearings (3-7) are arranged at the contact parts of the top and the bottom of the bearing sleeve (3-8) and the shaft sleeve (3-9), a first flange (3-6) is fixed on the lower end surface of the shaft sleeve (3-9) through screws, a spacer sleeve (3-5) is arranged between the first flange (3-6) and the high-speed shaft (3-12), a high-speed mounting plate (3-10) is fixed on the upper part of the shaft sleeve (3-9), and a second flange (3-11) is fixedly connected with the high-speed shaft and fixed on the upper surface of the high-speed mounting plate (3-10) through screws;
a connecting guard plate (3-3) is arranged outside the first coupler (3-2), the first flange (3-6) is fixedly connected with the connecting guard plate (3-3), and a locking cap (3-4) is arranged between the connecting guard plate (3-3) and the high-speed shaft (3-12).
3. The high-speed high-load aircraft tire rubber abrasion testing device according to claim 1, wherein the housing (1) comprises a frame, a protection plate and a transparent protection cover, the protection plate is fixed on the frame to form a closed box body, an opening is formed in the top of the box body, and the transparent protection cover is fixed on the opening of the box body.
4. The high-speed high-load aircraft tire rubber abrasion testing device according to claim 3, wherein the testing device further comprises a control panel, the control panel is connected with the control system, the control system is controlled through the control panel, and the control panel is fixed on the outer surface of the shell.
5. The high-speed high-load aircraft tire rubber abrasion testing device according to claim 1, wherein the highest loading load of the loading system (2) is 100 kg, the measurement precision is 1%, and the loading precision is < ± 3%.
6. The high-speed high-load aircraft tire part rubber abrasion testing device according to claim 1, wherein the preparation method of the rubber-coated sample wheel comprises the following steps: and coating the adhesive tape on the surface of the sample wheel along the circumferential direction, then putting the sample wheel into a mould, and vulcanizing and molding to form the rubber-coated sample wheel.
7. The high-speed high-load aircraft tire part rubber abrasion testing device according to claim 6,
the sample wheel is a metal wheel;
the circumferential surface of the sample wheel is of an array groove-shaped structure;
the rated rotating speed of the rubber-coated sample wheel is 1800rpm.
8. The high-speed high-load aircraft tire part rubber abrasion testing device according to claim 6, wherein the rubber coating thickness of the rubber coating sample wheel is 6mm.
9. The high-speed high-load aircraft tire section rubber abrasion testing device according to claim 1, wherein said pair of grinding wheels are metal wheels;
the back adhesive sand paper of the grinding wheel is coated with the sand paper, and the number of the back adhesive sand paper is 60-240 meshes;
the rated rotation speed of the coated abrasive paper to the grinding wheel is 500rpm.
10. A method of testing the abrasion of aircraft tire part rubber by a testing apparatus according to any one of claims 1 to 9, characterized by the steps of:
step one, weighing a rubber-coated sample wheel to be tested;
secondly, mounting the rubber-coated sample wheel to be tested and the sand-coated paper pair grinding wheel on a high-speed shaft assembly (3) and a pair grinding wheel assembly (5) of the testing device respectively;
setting the load of a loading system, the rotating speed of a rubber-coated sample wheel, the number of turns of the rubber-coated sample wheel, the rotating speed of the abrasive wheel by the sand-coated paper and the number of turns of the rubber-coated sample wheel by a control system;
step four, starting loading, and starting operation after the load is stable;
and fifthly, after the test is finished, unloading the rubber coated sample wheel to be tested, weighing, and calculating to obtain the abrasion of the rubber at the aircraft tire part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211239495.4A CN115855714A (en) | 2022-10-11 | 2022-10-11 | Abrasion testing device and method for high-speed high-load aircraft tire part rubber |
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| CN202211239495.4A CN115855714A (en) | 2022-10-11 | 2022-10-11 | Abrasion testing device and method for high-speed high-load aircraft tire part rubber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141742A (en) * | 2023-10-23 | 2023-12-01 | 中国飞机强度研究所 | Device and method for measuring vertical rigidity of aviation aircraft tire |
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2022
- 2022-10-11 CN CN202211239495.4A patent/CN115855714A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141742A (en) * | 2023-10-23 | 2023-12-01 | 中国飞机强度研究所 | Device and method for measuring vertical rigidity of aviation aircraft tire |
| CN117141742B (en) * | 2023-10-23 | 2024-01-26 | 中国飞机强度研究所 | Device and method for measuring vertical rigidity of aviation aircraft tire |
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