CN217156239U - Portable device for measuring sliding friction coefficient of local road surface - Google Patents
Portable device for measuring sliding friction coefficient of local road surface Download PDFInfo
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- CN217156239U CN217156239U CN202220475315.1U CN202220475315U CN217156239U CN 217156239 U CN217156239 U CN 217156239U CN 202220475315 U CN202220475315 U CN 202220475315U CN 217156239 U CN217156239 U CN 217156239U
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Abstract
The utility model discloses a portable device for measuring the sliding friction coefficient of a local pavement, which comprises a power vehicle and a detector, wherein the detector comprises a bottom supporting mechanism and a rotation testing mechanism, and the bottom supporting mechanism is connected with a first bracket and a second bracket; the rotation test mechanism comprises a third support, a fourth support, a main rotation shell and a test wheel, wherein the third support and the fourth support are respectively connected to the first support and the second support, the third support is connected with a first rotation positioning shaft sleeve, and the fourth support is provided with a second rotation positioning shaft sleeve and a first motor; the main rotating shell is connected between the first rotating positioning shaft sleeve and the second rotating positioning shaft sleeve through a first shell positioning rod, the first motor drives the first shell positioning rod to rotate, the side wall of the main rotating shell is perpendicularly connected with two groups of telescopic electric cylinder mechanisms, a first rotating shaft assembly and a test wheel are arranged between the two groups of telescopic electric cylinder mechanisms, and the test wheel is driven by the second motor. The device is convenient to install and operate and good in measuring effect.
Description
Technical Field
The utility model relates to an airport pavement check out test set field, concretely relates to portable local pavement coefficient of sliding friction survey device.
Background
At present, the runway anti-skid performance test can adopt a fixed point type anti-skid performance test method and a continuous type anti-skid performance test method, wherein the fixed point type anti-skid performance test method adopts a pendulum type friction instrument as test equipment, and the continuous type anti-skid performance test method adopts a Mu instrument trailer, a slipperimeter trailer, a surface friction test vehicle, a runway friction test vehicle, a TATRA friction test vehicle and an anti-skid test instrument trailer for testing. However, the pendulum-type friction meter has poor applicability and certain requirements on the texture form of the road surface, and therefore the test has certain limitations. The friction resistance test vehicle and other equipment are suitable for testing the sliding friction coefficient, but have certain defects. The method comprises the steps that the required distance for testing is long, the friction coefficient test value of the road surface is fuzzy, and the friction coefficient value of the local road surface cannot be accurately tested, so that the measurement of the skid resistance of the local road surface cannot be realized, an indoor test cannot be realized, the structure is complex, and the operation is difficult.
In the existing instrument, the driving wheel and the test wheel are required to rotate simultaneously during testing, certain requirements are required on the installation convenience and the use convenience of the whole equipment, and when the height of the test wheel is adjusted, the lifting mechanism is generally arranged on the main body mechanism and needs to support the rotation of the driving wheel and the test wheel, so that the requirements on the structural strength and the stability of the lifting mechanism are high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable local road surface coefficient of sliding friction survey device.
The utility model discloses a realize above-mentioned purpose, the technical solution who adopts is:
a portable device for measuring the sliding friction coefficient of a local pavement comprises a power vehicle and a detector, wherein the power vehicle provides electric energy for the detector, the detector comprises a bottom supporting mechanism and a rotation testing mechanism, and the upper left end and the upper right end of the bottom supporting mechanism are respectively connected with a first bracket and a second bracket;
the rotation test mechanism comprises a third support, a fourth support, a main rotation shell and a test wheel, wherein the third support and the fourth support are respectively connected to the first support and the second support, the third support is connected with a first rotation positioning shaft sleeve, and the fourth support is provided with a second rotation positioning shaft sleeve and a first motor;
the main rotating shell is connected between the first rotating positioning shaft sleeve and the second rotating positioning shaft sleeve through a first shell positioning rod, a first motor drives the first shell positioning rod to rotate, two groups of telescopic electric cylinder mechanisms are perpendicularly connected to the side wall of the main rotating shell, a first rotating shaft assembly is arranged between the two groups of telescopic electric cylinder mechanisms, test wheels are sleeved on the first rotating shaft assembly and driven by a second motor connected to the outer side of the second telescopic electric cylinder mechanism.
Preferably, the bottom support mechanism comprises a square bottom frame, the periphery of the square bottom frame is provided with a counterweight bearing plate, the square bottom frame comprises two bottom longitudinal beams and two bottom main rotating shells, and the two bottom longitudinal beams are connected between the two bottom main rotating shells through bolts; there are four balancing weight loading boards, balancing weight loading board of longeron adaptation at every end, balancing weight loading board of main shell adaptation of rotating at every end.
Preferably, the first support comprises a first support plate and three first support rods connected with the lower end of the first support plate, and the first support rods are connected with the bottom support mechanism through bolts;
the second support comprises a second support plate and three second support rods connected with the lower end of the second support plate, and the second support rods are connected with the bottom support mechanism through bolts.
Preferably, the third support comprises a third support plate and three third support rods connected to the upper end of the third support plate, the third support plate is fixedly connected with the first support plate through support plate bolts, the third support rods are welded with the first rotating and positioning shaft sleeve, and a first rotating and positioning bearing assembly is arranged in the first rotating and positioning shaft sleeve;
the fourth support comprises a fourth support plate and three fourth support rods connected to the upper end of the fourth support plate, the fourth support plate is fixedly connected with the second support plate through support plate bolts, the fourth support rods are welded with the second rotary positioning shaft sleeve, and a second rotary positioning bearing assembly is arranged in the second rotary positioning shaft sleeve;
the first motor is connected with the fourth support plate through the first motor support.
Preferably, the main rotating shell is in a rectangular shell shape, two first shell positioning rods are arranged, and the two first shell positioning rods are respectively connected to two ends of the main rotating shell through threads; the center of the first shell positioning rod is provided with a through hole.
Preferably, the telescopic electric cylinder mechanism comprises a telescopic positioning cylinder and a telescopic rod connected in the telescopic positioning cylinder, and a first telescopic protective shell is sleeved outside the telescopic positioning cylinder and fixed on the outer wall of the main rotating shell together with the first telescopic protective shell; the telescopic rod is sleeved with a second telescopic protective shell.
Preferably, the first rotating shaft assembly comprises a first rotating sleeve and a first rotating inner rod, the first rotating sleeve is connected between the two first telescopic protective shells, the first rotating inner rod is connected into the first rotating sleeve through a middle rotating bearing, and the end part of the first rotating inner rod penetrates through the first telescopic protective shell and then is connected with the second motor.
Preferably, the second motor is connected with the second telescopic protective shell through a second motor support.
Preferably, the power vehicle comprises a power vehicle body, and a power generation system and a power storage system in the power vehicle, wherein the power storage system is connected with a rotary electric connector arranged in the through hole through a first power line, and the rotary electric connector is connected with the first motor, the second motor and the telescopic electric cylinder mechanism through a second power line.
The utility model has the advantages that:
above-mentioned portable local pavement sliding friction coefficient survey device, overall structure is simple novel, and the design has the support connection structure that can conveniently dismantle, and the coefficient of friction that is used for on the outdoor airport pavement that can be more convenient detects, through high strength bolt connection between the part, convenient equipment and dismantlement, and is lower to the place requirement, both can satisfy indoor test and can satisfy outdoor test. The position height that rotation test mechanism located can be adjusted to the mode of accessible between first support, third support and installation cushion between second support, the fourth support, and the device satisfies each experimental requirement to the headroom, the installation of the different diameter test wheels of being convenient for. The operation is simple and convenient, auxiliary vehicle equipment is not needed, and a large amount of economic cost is reduced. The method has strong pertinence to local pavement, short test period and high efficiency, and has certain reference significance to pavement repair technology and non-navigation construction.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view showing the overall structure of a portable partial road surface sliding friction coefficient measuring device.
FIG. 2 is a schematic view showing a partial structure of a portable partial frictional coefficient measuring apparatus.
Detailed Description
The utility model provides a portable local pavement sliding friction coefficient survey device, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, it is following right the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The present invention will be described in detail with reference to the accompanying drawings:
example 1
With reference to fig. 1 and 2, a portable device for measuring the sliding friction coefficient of a local pavement comprises a power vehicle and a detector, wherein the power vehicle provides electric energy for the detector, the detector comprises a bottom supporting mechanism 1 and a rotation testing mechanism 2, and the upper left end and the upper right end of the bottom supporting mechanism 1 are respectively connected with a first support 3 and a second support 4.
The rotation testing mechanism 2 comprises a third support 5, a fourth support 6, a main rotation shell 21 and a testing wheel 22, wherein the third support 5 and the fourth support 6 are respectively connected to the first support 3 and the second support 4, the third support 5 is connected with a first rotation positioning shaft sleeve 51, and the fourth support 6 is provided with a second rotation positioning shaft sleeve 61 and a first motor 62.
The main rotating shell 21 is connected between the first rotating positioning shaft sleeve 51 and the second rotating positioning shaft sleeve 61 through a first shell positioning rod 23, the first motor 62 drives the first shell positioning rod 23 to rotate, two groups of telescopic electric cylinder mechanisms 7 are perpendicularly connected to the side wall of the main rotating shell 21, a first rotating shaft assembly 8 is arranged between the two groups of telescopic electric cylinder mechanisms 7, the first rotating shaft assembly is sleeved with the test wheel 22, and the test wheel 22 is driven by a second motor 801 connected to the outer side of the second telescopic electric cylinder mechanism 7.
The bottom support mechanism 1 comprises a square bottom frame 11, wherein a counterweight block bearing plate 12 is arranged around the square bottom frame 11, the square bottom frame 11 comprises two bottom longitudinal beams and two bottom main rotating shells, and the two bottom longitudinal beams are connected between the two bottom main rotating shells through bolts; there are four counterweight bearing plates 12, one counterweight bearing plate 12 of every end longeron adaptation, one counterweight bearing plate 12 of every end owner rotation shell adaptation.
The first bracket 3 includes a first leg 31 and three first legs 32 connecting lower ends of the first leg 31, and the first leg 31 is connected to the bottom bracket 1 by bolts. The second bracket 4 includes a second support plate 41 and three second struts 42 connecting lower ends of the second support plate 41, and the second struts 42 are connected to the bottom bracket 1 by bolts.
The third bracket 5 comprises a third support plate 52 and three third support rods 53 connected to the upper end of the third support plate 52, the third support plate 52 is fixedly connected with the first support plate 31 through support plate bolts, the third support rod 51 is welded with a first rotary positioning shaft sleeve 51, and a first rotary positioning bearing assembly is arranged in the first rotary positioning shaft sleeve 51.
The fourth support 6 comprises a fourth support plate 63 and three fourth support rods 64 connected to the upper end of the fourth support plate 63, the fourth support plate 3 is fixedly connected with the second support plate 41 through support plate bolts, the fourth support rods 64 are welded with a second rotary positioning shaft sleeve 61, a second rotary positioning bearing assembly is arranged in the second rotary positioning shaft sleeve 61, and the first motor 62 is connected with the fourth support plate 63 through a first motor support 65.
The main rotating shell 21 is in a rectangular shell shape, two first shell positioning rods 23 are arranged, and the two first shell positioning rods 23 are respectively connected to two ends of the main rotating shell 21 through threads; a through hole is formed in the center of the first housing positioning rod 23.
The telescopic electric cylinder mechanism 7 comprises a telescopic positioning cylinder 71 and a telescopic rod 72 connected in the telescopic positioning cylinder 71, wherein a first telescopic protective shell 73 is sleeved outside the telescopic positioning cylinder 71 and fixed on the outer wall of the main rotating shell 21 together with the first telescopic protective shell 73; a second telescopic protective shell 74 is sleeved outside the telescopic rod 72.
The first rotating shaft assembly 8 comprises a first rotating outer sleeve 81 and a first rotating inner rod 82, the first rotating outer sleeve 81 is connected between the two first telescopic protection shells 73, the first rotating inner rod 82 is connected in the first rotating outer sleeve 81 through a middle rotating bearing, and the end part of the first rotating inner rod 82 penetrates through the first telescopic protection shell 73 and then is connected with the second motor 801. The second motor 801 is connected to the second telescoping shield shell 74 via a second motor mount.
The power car comprises a power car body, and a power generation system and a power storage system which are arranged in the power car, wherein the power storage system is connected with a rotary electric connector arranged in a through hole through a first through circuit, and the rotary electric connector is connected with a first motor, a second motor and a telescopic electric cylinder mechanism through a second through circuit.
Example 2
The portable partial road surface sliding friction coefficient measuring device comprises the following implementation contents in use:
and (6) mounting a test wheel. The sliding friction coefficient measuring device is assembled and placed at the selected position, the bottom structure of the measuring device is stably placed on the road surface to be measured, stones or concrete blocks can be independently used as a balancing weight part of the measuring device, and the balancing weight part is placed on the balancing weight bearing plate 12.
According to the test conditions and requirements, installing corresponding test wheels, checking that the surfaces of the test wheels are in a non-abrasion state before installation, and adjusting the support rods to proper heights according to the sizes of the wheel diameters; the components of the sliding friction coefficient measuring device are all in normal working state, and the phenomenon of instrument separation is avoided.
Arranging a friction force sensor at the position of a wheel axle of the test wheel, spraying a water film with fixed thickness at a selected position, starting a first motor and a second motor, and adjusting the rotating speed of the test wheel to the test wheel speed V specified in the test conditions by using a rotating speed controller 0 . And then slowly adjusting the rotating speed V of the cross beam by using a rotating speed controller until the slip ratio between the rotating speed V and the cross beam meets the test requirement.
The slip ratio calculation formula is as follows:
in the formula: s is the slip ratio;
v is the speed of the main rotating shell, km/h;
V 0 -test wheel speed, km/h;
step 6: when the rotating speed difference between the main rotating shell and the test wheel reaches the fixed slip rate required by the test, the collection of the numerical value of the rotating speed sensor is started until the numerical value tends to be stable, and then the collection is stopped, and the first motor and the second motor are respectively and slowly braked. The data collected by the rotating speed sensor is arranged to obtain a friction force test value F f 。
The sliding friction coefficient value is calculated by the following formula:
in the formula: mu-coefficient of sliding friction;
F f -friction, kN;
n-vertical pressure, kN;
example 3
Above-mentioned portable local pavement sliding friction coefficient survey device, overall structure is simple novel, and the design has the support connection structure that can conveniently dismantle, and the coefficient of friction that is used for on the outdoor airport pavement that can be more convenient detects, through high strength bolt connection between the part, convenient equipment and dismantlement, and is lower to the place requirement, both can satisfy indoor test and can satisfy outdoor test. The position height that rotation test mechanism 2 was located is adjusted to the mode of accessible between first support, third support and installation cushion between second support, the fourth support, and the device satisfies each experimental requirement to the headroom, the installation of the different diameter test wheels of being convenient for. The operation is simple and convenient, auxiliary vehicle equipment is not needed, and a large amount of economic cost is reduced. The method has strong pertinence to local pavement, short test period and high efficiency, and has certain reference significance to pavement repair technology and non-navigation construction.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (9)
1. A portable device for measuring the sliding friction coefficient of a local pavement is characterized by comprising a power vehicle and a detector, wherein the power vehicle provides electric energy for the detector, the detector comprises a bottom supporting mechanism and a rotation testing mechanism, and the upper left end and the upper right end of the bottom supporting mechanism are respectively connected with a first bracket and a second bracket;
the rotation test mechanism comprises a third support, a fourth support, a main rotation shell and a test wheel, wherein the third support and the fourth support are respectively connected to the first support and the second support, the third support is connected with a first rotation positioning shaft sleeve, and the fourth support is provided with a second rotation positioning shaft sleeve and a first motor;
the main rotating shell is connected between the first rotating positioning shaft sleeve and the second rotating positioning shaft sleeve through a first shell positioning rod, a first motor drives the first shell positioning rod to rotate, two groups of telescopic electric cylinder mechanisms are perpendicularly connected to the side wall of the main rotating shell, a first rotating shaft assembly is arranged between the two groups of telescopic electric cylinder mechanisms, test wheels are sleeved on the first rotating shaft assembly and driven by a second motor connected to the outer side of the second telescopic electric cylinder mechanism.
2. The portable device for measuring the sliding friction coefficient of a local pavement according to claim 1, wherein the bottom support mechanism comprises a square bottom frame, a counterweight loading plate is arranged around the square bottom frame, the square bottom frame comprises two bottom longitudinal beams and two bottom main rotating shells, and the two bottom longitudinal beams are connected between the two bottom main rotating shells through bolts; there are four balancing weight loading boards, balancing weight loading board of longeron adaptation at every end, balancing weight loading board of main shell adaptation of rotating at every end.
3. The portable partial pavement sliding friction coefficient measuring device according to claim 1, wherein the first support comprises a first support plate and three first support rods connected with the lower end of the first support plate, and the first support rods are connected with the bottom support mechanism through bolts;
the second support comprises a second support plate and three second support rods connected with the lower end of the second support plate, and the second support rods are connected with the bottom support mechanism through bolts.
4. The portable device for measuring the sliding friction coefficient of a local pavement according to claim 3, wherein the third support comprises a third support plate and three third support rods connected to the upper end of the third support plate, the third support plate is fixedly connected with the first support plate through support plate bolts, the third support rods are welded with a first rotating positioning shaft sleeve, and a first rotating positioning bearing assembly is arranged in the first rotating positioning shaft sleeve;
the fourth support comprises a fourth support plate and three fourth support rods connected to the upper end of the fourth support plate, the fourth support plate is fixedly connected with the second support plate through support plate bolts, the fourth support rods are welded with a second rotary positioning shaft sleeve, and a second rotary positioning bearing assembly is arranged in the second rotary positioning shaft sleeve;
the first motor is connected with the fourth support plate through the first motor support.
5. The portable device for measuring the sliding friction coefficient of a local pavement according to claim 1, wherein the main rotating shell is rectangular, two first shell positioning rods are provided, and the two first shell positioning rods are respectively connected to two ends of the main rotating shell through threads; the center of the first shell positioning rod is provided with a through hole.
6. The portable device for measuring the sliding friction coefficient of the local pavement according to claim 1, wherein the telescopic electric cylinder mechanism comprises a telescopic positioning cylinder and a telescopic rod connected in the telescopic positioning cylinder, and a first telescopic protective shell is sleeved outside the telescopic positioning cylinder and fixed on the outer wall of the main rotating shell together with the first telescopic protective shell; the telescopic rod is sleeved with a second telescopic protective shell.
7. The portable device for measuring the sliding friction coefficient of a local pavement according to claim 6, wherein the first rotating shaft assembly comprises a first rotating sleeve and a first rotating inner rod, the first rotating sleeve is connected between the two first telescopic protective shells, the first rotating inner rod is connected in the first rotating sleeve through a middle rotating bearing, and the end part of the first rotating inner rod penetrates through the first telescopic protective shells and then is connected with the second motor.
8. The portable partial road surface sliding friction coefficient measuring device according to claim 7, wherein the second motor is connected to the second retractable protective shell through a second motor support.
9. The portable partial road surface sliding friction coefficient measuring device according to claim 5, wherein the power vehicle comprises a power vehicle body, and a power generation system and a power storage system in the power vehicle, the power storage system is connected with a rotary electric connector arranged in the through hole through a first electric communication line, and the rotary electric connector is connected with the first motor, the second motor and the telescopic cylinder mechanism through a second electric communication line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475315.1U CN217156239U (en) | 2022-03-07 | 2022-03-07 | Portable device for measuring sliding friction coefficient of local road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475315.1U CN217156239U (en) | 2022-03-07 | 2022-03-07 | Portable device for measuring sliding friction coefficient of local road surface |
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| Publication Number | Publication Date |
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| CN217156239U true CN217156239U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220475315.1U Active CN217156239U (en) | 2022-03-07 | 2022-03-07 | Portable device for measuring sliding friction coefficient of local road surface |
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- 2022-03-07 CN CN202220475315.1U patent/CN217156239U/en active Active
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