CN217156238U - Regulation formula airport local pavement coefficient of friction survey device - Google Patents
Regulation formula airport local pavement coefficient of friction survey device Download PDFInfo
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- CN217156238U CN217156238U CN202220475314.7U CN202220475314U CN217156238U CN 217156238 U CN217156238 U CN 217156238U CN 202220475314 U CN202220475314 U CN 202220475314U CN 217156238 U CN217156238 U CN 217156238U
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Abstract
The utility model discloses an adjustable airport local pavement friction coefficient measuring device, which comprises a base mechanism, a main rotating mechanism, a testing mechanism and a pressure sensing mechanism connected with the testing mechanism, wherein the base mechanism comprises a left base and a right base, the main rotating mechanism comprises a main rotating positioning shell, a driving wheel and a first motor, and the driving wheel is connected in the main rotating positioning shell through a first rotating shaft sleeve component; the main rotating positioning shell is connected between the left base and the right base through a first lifting component and a second lifting component; the first motor is connected with the driving wheel through a first belt transmission assembly; the testing mechanism comprises a testing wheel, a testing wheel support and a second motor, the testing wheel support is connected with the driving wheel, a testing wheel hub is sleeved on the testing wheel support and connected with the testing wheel through a second testing shaft sleeve assembly, and the second motor is connected with the testing wheel hub through a transmission shaft sleeve. The device has good adjustability and simple and novel structure, and can more stably and reliably complete the measurement of the friction coefficient of the local pavement of the airport.
Description
Technical Field
The utility model relates to an airport pavement detects technical field, concretely relates to local pavement friction coefficient survey device in regulation formula airport.
Background
The anti-skid performance evaluation of the concrete pavement of the airport is always a problem which is extremely important in the aviation industry, and the operation task of the airport is heavier along with the rapid development of the aviation industry. The number of large airplanes is increased continuously, flights are frequent, the taking-off and landing times of the airplanes are increased, and the pavement is subjected to the action of repeated impact load. Meanwhile, under the coupling action of environmental factors, a plurality of diseases are generated on the airport pavement, particularly the deterioration condition of the pavement surface layer is the most serious, so that the anti-skid performance is greatly reduced, and the flight safety cannot be ensured. Therefore, the research on the detection device and method aiming at the local pavement of the airport runway has certain significance.
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, and an indoor test cannot be realized. The structure is more complicated and the operation is not easy.
SUMMERY OF THE UTILITY MODEL
For overcoming prior art's not enough, the utility model aims to provide a local pavement friction coefficient survey device in regulation formula airport, the device regulation nature is good, and stability is high, can be more reliable and more stable completion airport local pavement friction coefficient's survey.
The utility model discloses a realize above-mentioned purpose, the technical solution who adopts is:
an adjustable airport local pavement friction coefficient measuring device comprises a base mechanism, a main rotating mechanism, a testing mechanism and a pressure sensing mechanism, wherein the base mechanism comprises a left base and a right base;
one side of the main rotating positioning shell is connected with the left base through a first lifting assembly, and the other side of the main rotating positioning shell is connected with the right base through a second lifting assembly; the first motor is connected to the main rotating positioning shell through a first motor support and is connected with the driving wheel through a first belt transmission assembly;
the testing mechanism comprises a testing wheel, a testing wheel support and a second motor, wherein the inner end of the testing wheel support is connected with the outer end face of the driving wheel, the outer end part of the testing wheel support is sleeved with a testing wheel hub, the testing wheel hub is connected with the testing wheel through a second testing shaft sleeve assembly, the second motor is connected to the testing wheel support through a second motor support, and the second motor is connected with the testing wheel hub through a transmission shaft sleeve; the pressure sensing mechanism comprises a pressure sensor and a sensing signal controller, the sensing signal controller is connected to the side end of the second motor support, and the pressure sensor is connected in the second testing shaft sleeve assembly.
Preferably, the left base and the right base are both special-shaped supports, the left base and the right base are arranged in a mirror symmetry mode, each special-shaped support consists of a rectangular block part and an arc-shaped block part, and the inner end face of each arc-shaped block part is an arc-shaped face;
the rectangular block part is provided with a lifting component positioning hole, the lower ends of the first lifting component and the second lifting component are both connected with a lifting positioning support, and the lifting positioning support is fixed on the lifting component positioning hole through screws.
Preferably, first lifting unit and second lifting unit are hydraulic lifting rod subassembly, and hydraulic lifting rod subassembly includes down a location section of thick bamboo, sets up the last hydraulic stem in a location section of thick bamboo down, and the one end of going up the hydraulic stem is connected with the cross support pole through first hydraulic stem location support, and the other end of cross support pole passes through the bolt and is connected with the second hydraulic stem location support that sets up on main rotation location shell outer wall.
Preferably, first lifting unit has two sets ofly, and two sets of first lifting unit set up the left side at the main rotation location shell, and second lifting unit has two sets ofly, and two sets of second lifting unit set up the right side at the main rotation location shell.
Preferably, a displacement signal transmitter is arranged on the outer wall of the lower positioning cylinder, a displacement signal receiver is arranged on the first hydraulic rod positioning support, a master controller is arranged on the side wall of the left base or the right base, and the displacement signal transmitter is connected with the master controller through a circuit; the master controller is connected with the first motor, the second motor and the sensing signal controller through lines.
Preferably, the driving wheel is provided with a first rotating speed sensor, the testing wheel is provided with a second rotating speed sensor, and the first rotating speed sensor and the second rotating speed sensor are connected with the master controller through wireless signals.
Preferably, the test wheel comprises an inner positioning wheel part and an outer friction wheel part sleeved at the outer end of the inner positioning wheel, and the inner positioning wheel part and the outer friction wheel part are both rubber wheels; and a friction force sensor is arranged in the second testing shaft sleeve assembly.
Preferably, a first article placing bedplate is arranged on the side wall of the left base or the side wall of the right base, and a hydraulic pump for driving the hydraulic lifting rod assembly is arranged on the first article placing bedplate.
Preferably, a second article placing bedplate is arranged on the side wall of the left base or the side wall of the right base, and a storage battery assembly is arranged on the second article placing bedplate.
The utility model has the advantages that:
the utility model provides a coefficient of friction survey device, the operation is simple and direct, need not auxiliary vehicle equipment, has reduced a large amount of economic cost. The method has the advantages of strong pertinence to the local road surface, short test period, high efficiency, high road surface repairing efficiency, high practicability and high creativity, and meets the construction requirement of non-stop 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 of the overall structure of a friction coefficient measuring device for a local runway surface of an adjustable airport.
FIG. 2 is a schematic side view of a friction coefficient measuring device for a local runway surface of a regulated airport.
Detailed Description
The utility model provides a local pavement friction coefficient survey device in regulation formula airport, 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
Referring to fig. 1 and 2, an adjustable airport local pavement friction coefficient measuring device comprises a base mechanism 1, a main rotating mechanism 2, a testing mechanism 3 and a pressure sensing mechanism 4. The base mechanism 1 comprises a left base 11 and a right base 12, the main rotating mechanism 2 comprises a main rotating positioning shell 21, a driving wheel 22 and a first motor 23, and the driving wheel 22 is connected in the main rotating positioning shell through a first rotating shaft sleeve component 28.
One side of the main rotation positioning shell 21 is connected with the left base 11 through the first lifting component 5, and the other side is connected with the right base 12 through the second lifting component 6. The first motor 23 is connected to the main rotation positioning housing 21 through a first motor support 24 and is connected to the driving pulley 22 through a first belt transmission assembly 25.
The testing mechanism 3 comprises a testing wheel 31, a testing wheel support 32 and a second motor 33, the inner end of the testing wheel support 32 is connected with the outer end face of the driving wheel 22, a testing wheel hub 34 is sleeved on the outer end portion of the testing wheel support 32, and the testing wheel hub 34 is connected with the testing wheel 31 through a second testing shaft sleeve component 35.
The second motor 33 is connected to the test wheel support 32 through the second motor support, the second motor 33 is connected to the test wheel hub 34 through the driving shaft sleeve, and the test wheel 3 is driven to rotate through the driving shaft sleeve after the rotating shaft of the second motor 33 rotates. The pressure sensing mechanism 4 comprises a pressure sensor and a sensing signal controller 41, the sensing signal controller 41 is connected to the side end of the second motor support, and the pressure sensor is connected to the inside of the second testing shaft sleeve assembly 35.
The left base 11 and the right base 12 are both special-shaped supports, the left base 11 and the right base 12 are arranged in a mirror symmetry mode, each special-shaped support is composed of a rectangular block portion 111 and an arc-shaped block portion 112, and the inner end face of each arc-shaped block portion 112 is an arc-shaped face.
The rectangular block part 111 is provided with a lifting component positioning hole, the lower ends of the first lifting component 5 and the second lifting component 6 are both connected with a lifting positioning support 51, and the lifting positioning support 51 is fixed on the lifting component positioning hole through screws.
A displacement signal transmitter 66 is arranged on the outer wall of the lower positioning cylinder 61, a displacement signal receiver 67 is arranged on the first hydraulic rod positioning support 63, a master controller 68 is arranged on the side wall of the left base 11 or the right base 12, and the displacement signal transmitter 66 is connected with the master controller 68 through a circuit; the master controller 68 is connected with the first motor 23, the second motor 33 and the sensing signal controller 41 through lines.
The driving wheel 22 is provided with a first rotating speed sensor, the testing wheel 31 is provided with a second rotating speed sensor, and the first rotating speed sensor and the second rotating speed sensor are connected with the master controller 68 through wireless signals.
The test wheel 31 comprises an inner positioning wheel part and an outer friction wheel part sleeved at the outer end of the inner positioning wheel, the inner positioning wheel part and the outer friction wheel part are rubber wheels, and a friction force sensor is arranged in the second test shaft sleeve component.
A first article placing platen 13 is provided on a side wall of the left base 11 or a side wall of the right base 12, and a hydraulic pump 14 for driving a hydraulic lift rod assembly is provided on the first article placing platen 13.
A second article placing bedplate 15 is arranged on the side wall of the left base 11 or the side wall of the right base 12, and a storage battery assembly 16 is arranged on the second article placing bedplate 15.
Example 2
The utility model provides a when regulation formula airport local pavement friction coefficient survey device used, concrete implementation step was:
1) mounting test wheel
And assembling and placing a friction coefficient measuring device at the selected position to ensure that the base fixing device is stably placed on the pavement to be measured.
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 hydraulic lifting rod assembly to a proper height according to the diameter of the wheels.
All parts of the friction coefficient measuring device are in normal working states, and the phenomenon of separation from an instrument is detected.
2) Setting fixed slip ratio
Arranging a friction force sensor at the wheel axle position of the test wheel, spraying a water film with fixed thickness at a selected position, starting the first motor 23 and the second motor 33, and adjusting the rotating speeds of the driving wheel 22 and the test wheel 31 to the rotating speed V of the test wheel specified in the test conditions by using a rotating speed controller 0 . And then slowly adjusting the rotating speed V of the driving wheel by using a rotating speed controller until the slip ratio between the driving wheel and the driving wheel meets the test requirement. When the load of the test wheel needs to be changed, the contact area between the test wheel and the ground is adjusted by adjusting the lifting height of the hydraulic lifting rod assembly, and then the situation that the airplane tire is loaded during takeoff or lifting is simulated.
The slip ratio calculation formula is as follows:
in the formula: s is the slip ratio;
v is driving wheel speed, km/h;
V 0 -measuring wheel speed, km/h;
when the rotating speed difference between the driving wheel and the testing wheel reaches the fixed slip rate required by the test, the acquisition is stopped after the value of the rotating speed sensor begins to be acquired until the value tends to be stable, 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
The utility model provides a coefficient of friction survey device connects hydraulic lifting rod subassembly on the base mechanism, and hydraulic lifting rod subassembly passes through high strength bolt and connects accredited testing organization, and convenient equipment and dismantlement require lowerly to the place, both can satisfy the laboratory test and can satisfy outdoor experiment. The height of the device is adjusted through the hydraulic lifting rod assembly by the driving wheel structure, so that the requirement of each test on clearance is met, and the mounting of test wheels with different diameters is facilitated.
The first motor is connected with the driving wheel and used for controlling the rotating speed of the driving wheel, and the second motor is connected with the testing wheel and used for controlling the rotating speed of the testing wheel, so that the friction coefficient under the condition of a certain slip rate is measured. The driving wheel can circularly rotate on the local road surface, so that the friction coefficient of the local road surface can be measured, the rotation state of the airplane tire during lifting or taking off is further simulated, and the accuracy of test is improved.
According to the friction coefficient measuring device, according to the test requirements, a pressure sensor and a friction force sensor are arranged, the pressure sensor is arranged on a bearing of a test wheel and connected with the bearing for measuring the friction force of the test wheel, the friction force sensor is arranged at the lower end of a bearing of the test wheel and used for measuring the friction force, and the measurement of the friction coefficient under the action of the driving load is effectively simulated.
The utility model provides a coefficient of friction survey device, the operation is simple and direct, need not auxiliary vehicle equipment, has reduced a large amount of economic cost. The method has the advantages of strong pertinence to the local road surface, short test period, high efficiency, high road surface repairing efficiency, high practicability and high creativity, and meets the construction requirement of non-stop construction. The utility model discloses the real size in product material object is not represented to the figure proportion size in the well specification attached drawing, and concrete size of a dimension uses in-service use as the standard.
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.
The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.
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. An adjustable airport local pavement friction coefficient measuring device is characterized by comprising a base mechanism, a main rotating mechanism, a testing mechanism and a pressure sensing mechanism, wherein the base mechanism comprises a left base and a right base;
one side of the main rotating positioning shell is connected with the left base through a first lifting assembly, and the other side of the main rotating positioning shell is connected with the right base through a second lifting assembly; the first motor is connected to the main rotating positioning shell through a first motor support and is connected with the driving wheel through a first belt transmission assembly;
the testing mechanism comprises a testing wheel, a testing wheel support and a second motor, wherein the inner end of the testing wheel support is connected with the outer end face of the driving wheel, the outer end part of the testing wheel support is sleeved with a testing wheel hub, the testing wheel hub is connected with the testing wheel through a second testing shaft sleeve assembly, the second motor is connected to the testing wheel support through a second motor support, and the second motor is connected with the testing wheel hub through a transmission shaft sleeve; the pressure sensing mechanism comprises a pressure sensor and a sensing signal controller, the sensing signal controller is connected to the side end of the second motor support, and the pressure sensor is connected in the second testing shaft sleeve assembly.
2. The adjustable airport local pavement friction coefficient measuring device according to claim 1, wherein the left base and the right base are both special-shaped supports, the left base and the right base are arranged in a mirror symmetry manner, the special-shaped supports are composed of rectangular blocks and arc blocks, and inner end surfaces of the arc blocks are arc surfaces;
the rectangular block part is provided with a lifting component positioning hole, the lower ends of the first lifting component and the second lifting component are both connected with a lifting positioning support, and the lifting positioning support is fixed on the lifting component positioning hole through screws.
3. The adjustable airport local pavement friction coefficient measuring device according to claim 1, wherein the first lifting assembly and the second lifting assembly are hydraulic lifting rod assemblies, each hydraulic lifting rod assembly comprises a lower positioning cylinder and an upper hydraulic rod arranged in the lower positioning cylinder, one end of each upper hydraulic rod is connected with a transverse supporting rod through a first hydraulic rod positioning support, and the other end of each transverse supporting rod is connected with a second hydraulic rod positioning support arranged on the outer wall of the main rotary positioning shell through a bolt.
4. The adjustable airport local pavement friction coefficient measuring device according to claim 1, wherein two sets of first lifting assemblies are provided, two sets of first lifting assemblies are provided on the left side of the main rotating positioning housing, two sets of second lifting assemblies are provided, and two sets of second lifting assemblies are provided on the right side of the main rotating positioning housing.
5. The adjustable airport local pavement friction coefficient measuring device according to claim 3, wherein a displacement signal transmitter is arranged on the outer wall of the lower positioning cylinder, a displacement signal receiver is arranged on the first hydraulic rod positioning support, a master controller is arranged on the side wall of the left base or the right base, and the displacement signal transmitter is connected with the master controller through a line; the master controller is connected with the first motor, the second motor and the sensing signal controller through lines.
6. The adjustable airport local pavement friction coefficient measuring device according to claim 4, wherein a first speed sensor is arranged on the driving wheel, a second speed sensor is arranged on the testing wheel, and the first speed sensor and the second speed sensor are connected with the master controller through wireless signals.
7. The adjustable airport local pavement friction coefficient measuring device according to claim 1, wherein the test wheel comprises an inner positioning wheel part and an outer friction wheel part sleeved at the outer end of the inner positioning wheel, and both the inner positioning wheel part and the outer friction wheel part are rubber wheels; and a friction force sensor is arranged in the second testing shaft sleeve assembly.
8. The adjustable airport local pavement friction coefficient measuring device according to claim 3, wherein a first article placing platen is provided on the side wall of said left base or the side wall of said right base, and a hydraulic pump for driving the hydraulic lift lever assembly is provided on the first article placing platen.
9. The adjustable airport local pavement friction coefficient measuring device according to claim 1, wherein a second item placing platen is disposed on the sidewall of said left base or the sidewall of said right base, and a battery assembly is disposed on said second item placing platen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475314.7U CN217156238U (en) | 2022-03-07 | 2022-03-07 | Regulation formula airport local pavement coefficient of friction survey device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475314.7U CN217156238U (en) | 2022-03-07 | 2022-03-07 | Regulation formula airport local pavement coefficient of friction survey device |
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| Publication Number | Publication Date |
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| CN217156238U true CN217156238U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220475314.7U Active CN217156238U (en) | 2022-03-07 | 2022-03-07 | Regulation formula airport local pavement coefficient of friction survey device |
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- 2022-03-07 CN CN202220475314.7U patent/CN217156238U/en active Active
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