A temperature testing device for rubber tires under simulated running conditions

Abstract

The present invention relates to the field of tire operating temperature testing, and in particular to a temperature testing device for a rubber tire under simulated operating conditions, including a test box, etc. The present invention provides a temperature testing device for a rubber tire under simulated operating conditions. When a belt conveyor drives a tire test group to simulate operating conditions, a forward infrared thermometer and a side infrared thermometer jointly perform non-contact temperature testing on all positions of the rubber tire. At the same time, multiple temperature sensors are respectively placed close to each position of the rubber tire to perform contact temperature testing. This device can not only comprehensively observe the overall temperature changes of the rubber tire during operation, but also perform temperature testing on the area of ​​the rubber tire below the water surface. The device cooperates with a positioning metal sheet that maintains a low temperature state to perform temperature testing on the rubber tire. This solves the technical problem that the infrared thermometer is affected by interference from multiple factors and affects the temperature testing effect of the rubber tire.

Description

Technical Field

[0001] The invention relates to the field of tire operating temperature testing, and in particular to a temperature testing device for a rubber tire in a simulated operating state. Background Art

[0002] Under the simulated operating conditions of rubber tires, infrared thermometers (including infrared thermal imagers) use non-contact temperature measurement technology to monitor the surface temperature distribution of rubber tires in real time. They can accurately analyze the temperature distribution of rubber tires under different working conditions, and provide key data support for rubber tire performance evaluation, safety warnings, and design optimization. However, the temperature measurement work of infrared thermometers is highly dependent on the thermal infrared rays generated by rubber tires during operation. Infrared thermometers are affected by factors such as the emission angle of thermal infrared rays, material surface properties, and environmental interference. There is a phenomenon that the measurement values ​​at different angles in the same area are inconsistent, which affects the temperature test effect of rubber tires. Summary of the Invention

[0003] In order to overcome the shortcoming that infrared thermometers are affected by various factors and thus affect the temperature testing effect of rubber tires, the present invention provides a temperature testing device for rubber tires in a simulated running state.

[0004] Technical solution: A temperature testing device for a rubber tire under simulated running conditions, comprising a test box, a forward infrared thermometer, a side infrared thermometer, a fixed rotating shaft, a threaded rod, a lock nut, a first fixed rod, a temperature sensor, a second fixed rod, and a belt conveyor; the forward infrared thermometer is installed on the front side of the test box; the side infrared thermometers are installed on the left and right sides of the test box; a fixed rotating shaft located behind the forward infrared thermometer is rotatably connected in the test box; a plurality of threaded rods for fixing a tire test group are fixed to the fixed rotating shaft; lock nuts are fixed to the threaded rods; a first fixed rod is fixed between the threaded rods and the lock nuts; the first fixed rod is installed with a temperature sensor; second fixed rods are fixed to the fixed rotating shaft, the number and position of which correspond to the first fixed rods, and the length of the second fixed rods is longer than that of the first fixed rods; the second fixed rods are also installed with a temperature sensor; a belt conveyor for driving the tire test group to simulate running is installed in the test box; a support roller for providing lower support for the tire test group is rotatably connected in the test box, and the support roller is in close contact with the drive belt of the belt conveyor.

[0005] In addition, it is particularly preferred that the temperature sensor is composed of a shell, a contact thermometer and a spring; the shell is fixed to the corresponding first fixed rod or the second fixed rod; the contact thermometer is slidably connected inside the shell; and a spring is fixed between the contact thermometer and the shell.

[0006] Furthermore, it is particularly preferred that a positioning metal sheet is fixedly connected to the front side of the first fixing rod.

[0007] In addition, it is particularly preferred that a mainstream dual-channel structure is provided in the fixed rotating shaft; a shunt dual-channel structure connected to the mainstream dual-channel structure is provided in the threaded rod, and the two channels of the shunt dual-channel structure are respectively connected to the corresponding channels in the mainstream dual-channel structure; a liquid storage cavity is provided inside the positioning metal sheet; an infusion tube is quickly and detachably fixed to the threaded rod, and a dual-channel infusion structure connected to the corresponding shunt dual-channel structure is provided in the infusion tube, and the two channels of the dual-channel infusion structure of the infusion tube are respectively connected to the corresponding channels in the shunt dual-channel structure; the two channels of the dual-channel infusion structure of the infusion tube are connected to the liquid storage cavity of the corresponding positioning metal sheet.

[0008] Furthermore, it is particularly preferred that an electrically controlled three-way valve is connected to the bottom of the test box.

[0009] In addition, it is particularly preferred that a transverse slider is slidably connected to the inner right side of the test box; an electric push rod for pushing the transverse slider to move is installed in the test box; and an inclined baffle is fixed to the transverse slider.

[0010] Furthermore, it is particularly preferred that the inclined baffle is fixedly connected with a water filter brush for removing residual water on the surface of the tire test group.

[0011] Furthermore, it is particularly preferred that an ambient wind simulator is installed in the test box.

[0012] In addition, it is particularly preferred that a windshield is fixedly connected to the right side of the test box, and the windshield is located below the lateral infrared thermometer on the same side.

[0013] In addition, it is particularly preferred that a plurality of air outlet slot structures are provided on the right side of the test box, and the air outlet slot structures are located below the wind shield.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention provides a temperature testing device for a rubber tire under simulated running conditions. When a belt conveyor drives a tire test group to simulate running, a forward infrared thermometer and a side infrared thermometer jointly perform non-contact temperature testing on all positions of the rubber tire. At the same time, a plurality of temperature sensors respectively perform contact temperature testing on all positions of the rubber tire. This device can not only comprehensively observe the overall temperature changes of the rubber tire during running, but also perform temperature testing on the area of ​​the rubber tire below the water surface. This device realizes temperature testing of the rubber tire by using a non-contact infrared thermometer and a contact temperature sensor in combination with a positioning metal sheet that maintains a low temperature state. This solves the technical problem that the infrared thermometer is affected by interference from multiple factors and affects the temperature testing effect of the rubber tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A first perspective view for describing the present invention;

[0016] Figure 2 A second perspective view for describing the present invention;

[0017] Figure 3 A three-dimensional cross-sectional view of a test box for describing the present invention;

[0018] Figure 4 A three-dimensional diagram illustrating a simulated operating state of a tire test set according to the present invention;

[0019] Figure 5 A perspective view of the fixed shaft and the first fixed rod for describing the present invention;

[0020] Figure 6 A perspective view of a first fixing rod for describing the present invention;

[0021] Figure 7 A perspective view of a fixed shaft for describing the present invention;

[0022] Figure 8 A three-dimensional cross-sectional view of a temperature sensor for describing the present invention;

[0023] Figure 9 A perspective view of an inclined baffle for describing the present invention.

[0024] Figure numerals: 1-test box, 101-air outlet slot structure, 11-electrically controlled three-way valve, 12-ambient wind simulator, 13-wind shield, 2-forward infrared thermometer, 3-lateral infrared thermometer, 4-fixed rotating shaft, 401-mainstream dual-channel structure, 402-diversion dual-channel structure, 41-threaded rod, 411-locking nut, 42-first fixed rod, 43-temperature sensor, 431-housing, 432-contact thermometer, 433-spring, 44-second fixed rod, 45-positioning metal sheet, 4501-liquid storage chamber, 46-infusion tube, 4601-dual-channel infusion structure, 5-belt transmission, 51-support roller, 61-transverse slider, 62-electric push rod, 63-inclined baffle, 64-water filter brush, 7-tire test group. DETAILED DESCRIPTION

[0025] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those skilled in the art will recognize that terms such as "above," "below," "upwardly," "downwardly," and the like are used to describe the drawings and are not intended to limit the scope of the present invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0026] Example 1

[0027] A temperature testing device for a rubber tire under simulated running conditions in this embodiment is as follows: Figures 1-9 As shown, the test box 1 includes a forward infrared thermometer 2, a side infrared thermometer 3, a fixed shaft 4, a threaded rod 41, a lock nut 411, a first fixed rod 42, a temperature sensor 43, a second fixed rod 44, and a belt conveyor 5; the front side of the test box 1 is installed with the forward infrared thermometer 2; the upper left side and the upper right side of the test box 1 are each installed with a side infrared thermometer 3; the test box 1 is rotatably connected to the fixed shaft 4 located at the rear side of the forward infrared thermometer 2; a plurality of threaded rods 41 for fixing the tire test group 7 are welded to the fixed shaft 4; each threaded rod 41 is fixed with a lock nut 411; each threaded rod 41 and the lock nut 411 are fixed to each other. A first fixing rod 42 is fixed between each of the two test boxes; a temperature sensor 43 is installed at one end of each first fixing rod 42 away from the fixed rotating shaft 4; second fixing rods 44 are welded on the fixed rotating shaft 4, and the number and position of the second fixing rods 44 correspond to those of the first fixing rods 42, and the length of the second fixing rods 44 is longer than that of the first fixing rods 42; a temperature sensor 43 is also installed at one end of each second fixing rod 44 away from the fixed rotating shaft 4; a belt conveyor 5 for driving the tire test group 7 to simulate operation is installed in the test box 1; three support rollers 51 for providing lower support to the tire test group 7 are rotatably connected in the test box 1, and the support rollers 51 are in close contact with the transmission belt of the belt conveyor 5.

[0028] like Figure 5 and Figure 8 As shown, in this embodiment, the temperature sensor 43 is composed of a housing 431, a contact thermometer 432 and a spring 433; the housing 431 is fixed to the corresponding first fixing rod 42 or second fixing rod 44; the contact thermometer 432 is slidably connected in the housing 431; the spring 433 is fixed between the contact thermometer 432 and the housing 431; when the tire test group 7 is installed on the threaded rod 41 of the fixed shaft 4, the rubber tire of the tire test group 7 pushes the contact thermometer 432 to compress the spring 433, causing the compressed spring 433 to Under the action of the reverse elastic force, the contact thermometer 432 is pushed outward to tightly adhere to the outer surface of the rubber tire of the tire test group 7. The contact thermometer 432 monitors the surface temperature of the rubber tire. When the belt conveyor 5 drives the tire test group 7 to simulate operation, the rubber tire of the tire test group 7 gradually heats up and expands and deforms. At this time, the expanded and deformed rubber tire will continue to push the contact thermometer 432 to drive the spring 433 to compress, so as to prevent the contact thermometer 432 from generating excessive squeezing pressure on the expanded and deformed rubber tire and causing damage to its surface due to its inability to move.

[0029] like Figure 5-Figure 7As shown, in this embodiment, each first fixed rod 42 is fixed with a positioning metal sheet 45 on the front side of one end away from the fixed shaft 4; a mainstream dual-channel structure 401 is provided in the fixed shaft 4, and the two channels of the mainstream dual-channel structure 401 of the fixed shaft 4 are respectively connected to the output port and the return port of the coolant circulation device; each threaded rod 41 is provided with a diversion dual-channel structure 402 connected to the mainstream dual-channel structure 401, and the two channels of the diversion dual-channel structure 402 are respectively connected to the corresponding channels in the mainstream dual-channel structure 401. The channels are connected; a liquid storage cavity 4501 is provided inside the positioning metal sheet 45; an infusion tube 46 is fixedly connected to each threaded rod 41 in a quick-detachable manner, and a dual-channel infusion structure 4601 connected to the corresponding shunt dual-channel structure 402 is provided in the infusion tube 46, and the two channels of the dual-channel infusion structure 4601 of the infusion tube 46 are respectively connected to the corresponding channels in the shunt dual-channel structure 402; the two channels of the dual-channel infusion structure 4601 of each infusion tube 46 are respectively connected to the liquid storage cavity 4501 of the corresponding positioning metal sheet 45.

[0030] The conventional working condition testing steps of a temperature testing device for a rubber tire in a simulated operating state of this embodiment are as follows.

[0031] First, the operator removes the infusion tube 46 and the locknut 411 from the threaded rod 41, then fixes the wheel hub of the tire test group 7 to be tested between the fixed rotating shaft 4 and each threaded rod 41, and reinstalls the locknut 411 and the infusion tube 46 back onto the threaded rod 41. At this time, the rubber tire of the tire test group 7 is close to the transmission belt of the belt conveyor 5, and the support roller 51 provides lower support to the rubber tire of the tire test group 7 through the transmission belt of the belt conveyor 5. All temperature sensors 43 located on the first fixed rod 42 and the second fixed rod 44 are respectively close to various areas of the rubber tire surface of the tire test group 7, completing the fixation of the tire test group 7 on the fixed rotating shaft 4.

[0032] Afterwards, the operator starts the belt conveyor 5, and the transmission belt of the belt conveyor 5 continuously drives the tire test group 7 and the fixed rotating shaft 4 to rotate, performing a simulated operation of the rubber tire. During this process, the forward infrared thermometer 2 and the side infrared thermometer 3 jointly perform a comprehensive non-contact temperature test on each position of the rubber tire to monitor the heat generated at each position during the operation of the rubber tire. At the same time, the temperature sensors 43 are respectively attached to each area of ​​the rubber tire surface of the tire test group 7. As the temperature sensors 43 rotate with the tire test group 7, the temperature sensors 43 perform local contact temperature testing on the corresponding positions of the rubber tire to monitor the heat generated at local positions during the operation of the rubber tire.

[0033] During the above-mentioned temperature test, the external coolant circulation device continuously circulates the coolant into the liquid storage cavity 4501 of the positioning metal sheet 45 through the mainstream dual-channel structure 401 of the fixed rotating shaft 4, the diversion dual-channel structure 402 of the threaded rod 41 and the infusion tube 46, so that the positioning metal sheet 45 is kept in a low temperature state that is significantly different from the surface temperature of the rubber tire. During the temperature test of the simulated rubber tire surface by the forward infrared thermometer 2, the forward infrared thermometer 2 will continuously record the position of each positioning metal sheet 45 relative to the rubber tire surface in different time periods. The positioning metal sheet 45 is adjacent to the temperature sensor 43 on the first fixed rod 42 on the same side and the temperature sensor 43 on the second fixed rod 44 on the same side. Therefore, based on the position of the positioning metal sheet 45 in a certain time period, the positions of the two adjacent temperature sensors 43 relative to the rubber tire surface can be quickly located.

[0034] Since the contact temperature test accuracy of the rubber tire by the temperature sensor 43 is higher than the non-contact temperature test accuracy of the rubber tire by the forward infrared thermometer 2 and the side infrared thermometer 3, the temperature of the corresponding area on the surface of the rubber tire tested by the temperature sensor 43 is first used as the standard temperature, and then a correction value is added to the temperature tested on the same area of ​​the rubber tire by the forward infrared thermometer 2 and the side infrared thermometer 3 based on the standard temperature. The correction value is equal to the temperature value tested on the same area of ​​the rubber tire by the forward infrared thermometer 2 or the side infrared thermometer 3 minus the temperature value tested on the same area of ​​the rubber tire by the temperature sensor 43. When the forward infrared thermometer 2 and the side infrared thermometer 3 perform temperature tests on other areas of the rubber tire, the forward infrared thermometer 2 and the side infrared thermometer 3 add corresponding correction values ​​to the tested temperature to obtain a more accurate test temperature. This not only significantly reduces the difference in temperature values ​​tested on the same area of ​​the rubber tire by the forward infrared thermometer 2 and the side infrared thermometer 3, but also improves the temperature test accuracy of each area of ​​the rubber tire.

[0035] like Figure 3 and Figure 9 As shown, in this embodiment, an electrically controlled three-way valve 11 is connected to the bottom of the test box 1, one port of the electrically controlled three-way valve 11 is externally connected to a clean water delivery device for delivering clean water, and the other port of the electrically controlled three-way valve 11 is externally connected to a clean water recovery device for discharging clean water; a transverse slider 61 is slidably connected to the inner right side of the test box 1; an electric push rod 62 is installed in the test box 1; the telescopic end of the electric push rod 62 is fixedly connected to the transverse slider 61; an inclined baffle 63 inclined to the upper right is fixedly connected to the transverse slider 61; a water filter brush 64 is fixedly connected to the left side of the inclined baffle 63.

[0036] The steps for testing a water wading condition of a temperature testing device in a rubber tire simulated operating state of this embodiment are as follows.

[0037] When it is necessary to perform a temperature test on the rubber tire under simulated operation in water-wading conditions, first complete the fixing work of the tire test group 7 on the fixed rotating shaft 4 according to the above steps, and then the transmission belt of the belt conveyor 5 continuously drives the tire test group 7 and the fixed rotating shaft 4 to rotate to perform the simulated operation of the rubber tire. At the same time, the external clean water delivery equipment delivers clean water into the test box 1 through the electronically controlled three-way valve 11 until the test box 1 submerges the transmission belt of the belt conveyor 5 and the lower side of the rubber tire, thereby performing the simulated operation of the rubber tire under water-wading conditions. At the same time, the forward infrared thermometer 2 and the side infrared thermometer 3 jointly perform non-contact temperature testing on various positions of the non-water-wading area of ​​the rubber tire to monitor the heat generated at various positions in the non-water-wading area during the operation of the rubber tire. At the same time, the temperature sensors 43 are respectively placed in close contact with various areas of the rubber tire surface of the tire test group 7, and local contact temperature testing is performed on the corresponding positions of the rubber tire in the non-water-wading area and the water-wading area in turn to monitor the heat generated at local positions during the operation of the rubber tire.

[0038] During the simulated operation of the tire test group 7 driven by the belt conveyor 5, the electric push rod 62 pushes the horizontal slider 61 to drive the oblique baffle 63 to the left close to the rubber tire until the water filter brush 64 is close to the rubber tire. The water filter brush 64 brushes off most of the water attached to the surface of the rubber tire. At the same time, the water splashed upward by the rubber tire will also be blocked by the oblique baffle 63, avoiding the water attached to the rubber surface and the water splashed upward by the rubber tire to seriously interfere with the temperature testing work of the forward infrared thermometer 2 and the side infrared thermometer 3. Although the residual water attached to the surface of the rubber tire will slightly interfere with the temperature testing work of the forward infrared thermometer 2 and the side infrared thermometer 3, based on the positioning function of the above-mentioned positioning metal sheet 45 and the correction value calculation function of the temperature sensor 43, the interference caused by the residual water attached to the surface of the rubber tire to the temperature test can be eliminated to the greatest extent, thereby ensuring the validity of the temperature test results of the rubber tire during simulated operation under wading conditions.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that Figures 1-9As shown, the test box 1 of this embodiment is equipped with an environmental wind simulator 12 for blowing simulated environmental natural wind to the surface of the belt component of the belt conveyor 5. When the belt conveyor 5 drives the tire test group 7 to simulate operation, the environmental wind simulator 12 continuously blows airflow to the contact area between the belt conveyor 5 and the tire test group 7, and the tire test group 7 is cooled by the airflow simulating the environmental natural wind. At the same time, the environmental wind simulator 12 adjusts the flow rate of the blowing airflow according to the rotation speed of the tire test group 7. The higher the rotation speed of the tire test group 7 and the faster the simulated vehicle driving speed, the correspondingly faster the flow rate of the airflow blown out by the environmental wind simulator 12 is also, thereby effectively testing the air cooling effect of the rubber tire during the operation of the tire test group 7.

[0041] Example 3

[0042] The difference between this embodiment and embodiment 2 is that Figures 1-9 As shown, a windshield 13 is fixedly connected to the right side of the test box 1 of this embodiment, and the windshield 13 is located below the side infrared thermometer 3 on the same side; a plurality of air outlet slot structures 101 are opened on the right side of the test box 1, and the air outlet slot structure 101 is located below the windshield 13. When the environmental wind simulator 12 continuously blows airflow to the contact area between the belt conveyor 5 and the tire test group 7, the airflow continuously carries the heat on the surface of the tire test group 7 and flows to the right under the windshield 13. Under the obstruction of the windshield 13, the airflow carrying heat can only flow out of the test box 1 through the air outlet slot structure 101, thereby preventing the heat-carrying airflow from interfering with the normal temperature measurement work of the side infrared thermometer 3 when it flows through the side infrared thermometer 3 to the upper right.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A temperature testing device for a rubber tire under simulated running conditions, comprising a test box (1); a forward infrared thermometer (2) installed on the front side of the test box (1); and side infrared thermometers (3) installed on the left and right sides of the test box (1); Its characteristics are: The invention also includes a fixed rotating shaft (4); a fixed rotating shaft (4) located at the rear side of the forward infrared thermometer (2) is rotatably connected in the test box (1); a plurality of threaded rods (41) for fixing the tire test group (7) are fixed on the fixed rotating shaft (4); a locking nut (411) is fixed on the threaded rod (41); a first fixing rod (42) is fixed between the threaded rod (41) and the locking nut (411); a temperature sensor (43) is installed on the first fixing rod (42); a number of fixed rods (41) and a plurality of fixed rods (42) are fixed on the fixed rotating shaft (4). A second fixed rod (44) is positioned corresponding to the first fixed rod (42), and the length of the second fixed rod (44) is longer than that of the first fixed rod (42); the second fixed rod (44) is also installed with a temperature sensor (43); a belt transmission machine (5) for driving the tire test group (7) to simulate operation is installed in the test box (1); a support roller (51) for providing lower support for the tire test group (7) is rotatably connected in the test box (1), and the support roller (51) is in close contact with the transmission belt of the belt transmission machine (5); A positioning metal sheet (45) is fixedly connected to the front side of the first fixing rod (42); A mainstream dual-channel structure (401) is provided in the fixed rotating shaft (4); a shunt dual-channel structure (402) connected to the mainstream dual-channel structure (401) is provided in the threaded rod (41), and the two channels of the shunt dual-channel structure (402) are respectively connected to the corresponding channels in the mainstream dual-channel structure (401); a liquid storage cavity (4501) is provided inside the positioning metal sheet (45); an infusion tube (46) is fixedly connected to the threaded rod (41) in a quick-detachable manner, and a dual-channel infusion structure (4601) connected to the corresponding shunt dual-channel structure (402) is provided in the infusion tube (46), and the two channels of the dual-channel infusion structure (4601) of the infusion tube (46) are respectively connected to the corresponding channels in the shunt dual-channel structure (402); the two channels of the dual-channel infusion structure (4601) of the infusion tube (46) are connected to the liquid storage cavity (4501) of the corresponding positioning metal sheet (45).

2. A temperature testing device for a rubber tire under simulated running conditions according to claim 1, characterized in that: The temperature sensor (43) is composed of a housing (431), a contact thermometer (432), and a spring (433); the housing (431) is fixedly connected to the corresponding first fixing rod (42) or the second fixing rod (44); the contact thermometer (432) is slidably connected in the housing (431); and the spring (433) is fixedly connected between the contact thermometer (432) and the housing (431).

3. A temperature testing device for a rubber tire under simulated running conditions according to claim 1, characterized in that: The bottom of the test box (1) is connected to an electrically controlled three-way valve (11).

4. A temperature testing device for a rubber tire under simulated running conditions according to claim 1, characterized in that: A transverse slider (61) is slidably connected to the inner right side of the test box (1); an electric push rod (62) is installed in the test box (1) to push the transverse slider (61) to move; and an oblique baffle (63) is fixed to the transverse slider (61).

5. A temperature testing device for a rubber tire under simulated running conditions according to claim 4, characterized in that: The inclined baffle (63) is fixedly connected with a water filter brush (64) for removing residual water on the surface of the tire test group (7).

6. A temperature testing device for a rubber tire under simulated running conditions according to any one of claims 1 to 5, characterized in that: An environmental wind simulator (12) is installed in the test box (1).

7. A temperature testing device for a rubber tire under simulated running conditions according to claim 6, characterized in that: A windshield (13) is fixedly connected to the right side of the test box (1), and the windshield (13) is located below the lateral infrared thermometer (3) on the same side.

8. A temperature testing device for a rubber tire under simulated running conditions according to claim 7, characterized in that: A plurality of air outlet slot structures (101) are provided on the right side of the test box (1), and the air outlet slot structures (101) are located below the wind shield (13).

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