Temperature testing device for rubber tire in simulated running state

Abstract

The invention relates to the field of tire running temperature testing, in particular to a temperature testing device for a rubber tire in a simulated running state, which comprises a testing box and the like. According to the temperature testing device for the rubber tire in the simulated operation state, when the belt transmission machine drives the tire testing group to perform simulated operation work, the forward infrared temperature measuring instrument and the lateral infrared temperature measuring instrument comprehensively perform non-contact temperature testing work on all positions of the rubber tire together; meanwhile, a plurality of temperature sensors cling to each position of the rubber tire respectively to carry out contact type temperature testing work, so that the overall temperature change of the rubber tire in the running process can be observed comprehensively, and the temperature of the area, below the water surface, of the rubber tire can be tested; and the temperature of the rubber tire is tested in cooperation with the positioning metal sheet in a low-temperature state. The technical problem that the temperature testing effect of the rubber tire is affected due to the fact that the infrared thermometer is interfered by various factors is solved.

Description

Technical Field

[0001] The present invention relates to the field of tire operating temperature testing, and particularly to a temperature testing device for rubber tires under simulated operating conditions. Background Art

[0002] Under the simulated operating conditions of rubber tires, an infrared thermometer (including an infrared thermal imager) monitors the surface temperature distribution of rubber tires in real time through non-contact temperature measurement technology, and can accurately analyze the temperature distribution of rubber tires under different working conditions, providing key data support for rubber tire performance evaluation, safety warning, and design optimization. However, the temperature measurement work of the infrared thermometer highly depends on the thermal infrared rays generated during the operation of rubber tires, and the infrared thermometer is interfered by factors such as the emission angle of thermal infrared rays, the surface characteristics of materials, and environmental interference, resulting in inconsistent measurement values at different angles in the same area, affecting the temperature test effect of rubber tires. Summary of the Invention

[0003] In order to overcome the drawback that the infrared thermometer affects the temperature test effect of rubber tires due to being interfered by various factors, the present invention provides a temperature testing device for rubber tires under simulated operating conditions.

[0004] Technical Solution: A temperature testing device for rubber tires under simulated operating conditions includes a test box, a forward infrared thermometer, a lateral infrared thermometer, a fixed rotating shaft, a threaded rod, a locknut, a first fixing rod, a temperature sensor, a second fixing rod, and a belt drive; the forward infrared thermometer is installed on the front side of the test box; the lateral 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 inside the test box; a plurality of threaded rods for fixing the tire test group are fixedly connected to the fixed rotating shaft; locknuts are fixed on the threaded rods; a first fixing rod is fixed between the threaded rod and the locknut; the first fixing rod is equipped with a temperature sensor; a second fixing rod corresponding in number and position to the first fixing rod is fixedly connected to the fixed rotating shaft, and the length of the second fixing rod is longer than that of the first fixing rod; the second fixing rod is also equipped with a temperature sensor; a belt drive for driving the tire test group to simulate operation is installed inside the test box; a support roller for providing a lower support to the tire test group is rotatably connected inside the test box, and the support roller is in close contact with the transmission belt of the belt drive.

[0005] In addition, particularly preferably, the temperature sensor is jointly composed of a housing, a contact thermometer, and a spring; the housing is fixedly connected to the corresponding first fixing rod or second fixing rod; a contact thermometer is slidably connected inside the housing; a spring is jointly fixedly connected between the contact thermometer and the housing.

[0006] In addition, particularly preferably, 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 main flow double-channel structure is provided in the fixed rotating shaft; a shunt double-channel structure communicating with the main flow double-channel structure is provided in the threaded rod, and the two channels of the shunt double-channel structure are respectively communicated with the corresponding channels in the main flow double-channel structure; a liquid storage cavity is provided inside the positioning metal sheet; an infusion tube is detachably fixed on the threaded rod, and a double-channel infusion structure communicating with the corresponding shunt double-channel structure is provided in the infusion tube, and the two channels of the double-channel infusion structure of the infusion tube are respectively communicated with the corresponding channels in the shunt double-channel structure; the two channels of the double-channel infusion structure of the infusion tube are communicated with the liquid storage cavity of the corresponding positioning metal sheet.

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

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

[0010] In addition, it is particularly preferred that a water filtering brush for brushing off the residual moisture on the surface of the tire test group is fixed on the inclined baffle.

[0011] In addition, it is particularly preferred that an environmental wind simulator is installed in the test chamber.

[0012] In addition, it is particularly preferred that a wind shield is fixed to the right inner side of the test chamber, and the wind shield is located below the lateral infrared thermometer on the same side.

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

[0014] Compared with the prior art, the present invention has the following advantages: The temperature testing device for rubber tires under simulated operating conditions of the present invention, during the simulated operation of the tire test group driven by the belt drive, the forward infrared thermometer and the lateral infrared thermometer jointly perform non-contact temperature testing on various positions of the rubber tire, and at the same time, a plurality of temperature sensors are respectively in close contact with various positions of the rubber tire for contact temperature testing. It can not only comprehensively observe the overall temperature change of the rubber tire during operation, but also perform temperature testing on the area of the rubber tire below the water surface. By using a non-contact infrared thermometer and a contact temperature sensor in combination, and cooperating with the positioning metal sheet maintained at a low temperature state, the temperature testing of the rubber tire is realized, and the technical problem that the infrared thermometer affects the temperature testing effect of the rubber tire due to various factors is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view of the first perspective for describing the present invention; Figure 2For describing the second perspective three-dimensional view of the present invention; Figure 3 For describing the three-dimensional sectional view of the test chamber of the present invention; Figure 4 For describing the three-dimensional view of the simulated operating state of the tire test group of the present invention; Figure 5 For describing the three-dimensional view of the fixed rotating shaft and the first fixing rod of the present invention; Figure 6 For describing the three-dimensional view of the first fixing rod of the present invention; Figure 7 For describing the three-dimensional view of the fixed rotating shaft of the present invention; Figure 8 For describing the three-dimensional sectional view of the temperature sensor of the present invention; Figure 9 For describing the three-dimensional view of the inclined baffle of the present invention.

[0016] Reference numerals: 1 - test chamber, 101 - air outlet groove structure, 11 - electric three-way valve, 12 - environmental wind simulator, 13 - wind baffle, 2 - forward infrared thermometer, 3 - lateral infrared thermometer, 4 - fixed rotating shaft, 401 - main flow double-channel structure, 402 - shunt double-channel structure, 41 - threaded rod, 411 - locknut, 42 - first fixing rod, 43 - temperature sensor, 431 - sleeve, 432 - contact thermometer, 433 - spring, 44 - second fixing rod, 45 - positioning metal sheet, 4501 - liquid storage cavity, 46 - infusion tube, 4601 - double-channel infusion structure, 5 - belt drive, 51 - support roller, 61 - horizontal slider, 62 - electric push rod, 63 - inclined baffle, 64 - water filter brush, 7 - tire test group. Detailed implementation manners

[0017] Although the present invention may be described with respect to specific applications or industries, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and do not represent a limitation on the scope of the present invention as defined by the appended claims. Any numerical labels such as: first or second are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0018] Example 1 A temperature test device under the simulated operating state of a rubber tire in this embodiment, as Figures 1-9As shown in the figure, it includes a test box 1, a forward infrared thermometer 2, a lateral infrared thermometer 3, a fixed rotating shaft 4, a threaded rod 41, a locknut 411, a first fixed rod 42, a temperature sensor 43, a second fixed rod 44, and a belt drive 5. A forward infrared thermometer 2 is installed on the front side of the test box 1. A lateral infrared thermometer 3 is installed on each of the upper left side and upper right side of the test box 1. A fixed rotating shaft 4 located behind the forward infrared thermometer 2 is rotatably connected inside the test box 1. A number of threaded rods 41 for fixing the tire test group 7 are welded on the fixed rotating shaft 4. A locknut 411 is fixed on each threaded rod 41. A first fixed rod 42 is fixed between each threaded rod 41 and the locknut 411. A temperature sensor 43 is installed at one end of each first fixed rod 42 away from the fixed rotating shaft 4. Second fixed rods 44 with the same quantity and positions corresponding to the first fixed rods 42 are welded on the fixed rotating shaft 4, and the length of the second fixed rod 44 is longer than that of the first fixed rod 42. A temperature sensor 43 is also installed at one end of each second fixed rod 44 away from the fixed rotating shaft 4. A belt drive 5 for driving the tire test group 7 to simulate operation is installed inside the test box 1. Three support rollers 51 for providing lower support to the tire test group 7 are rotatably connected inside the test box 1, and the support rollers 51 are in close contact with the transmission belt of the belt drive 5.

[0019] As Figure 5 and Figure 8 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 fixedly connected to the corresponding first fixed rod 42 or second fixed rod 44. A contact thermometer 432 is slidably connected inside the housing 431. A spring 433 is fixedly connected 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 rotating shaft 4, the rubber tire of the tire test group 7 pushes the contact thermometer 432 to drive the spring 433 to compress. The compressed spring 433 pushes the contact thermometer 432 outward to closely adhere to the outer surface of the rubber tire of the tire test group 7 under the action of the reverse elastic force. The contact thermometer 432 monitors the surface temperature of the rubber tire. During the process of the belt drive 5 driving the tire test group 7 to simulate operation, the rubber tire of the tire test group 7 gradually heats up and undergoes expansion deformation. At this time, the expanded and deformed rubber tire will continue to push the contact thermometer 432 to drive the spring 433 to compress, preventing the contact thermometer 432 from generating excessive extrusion force on the expanded and deformed rubber tire due to its immobility and causing damage to its surface.

[0020] As Figures 5-7As shown, in this embodiment, each first fixed rod 42 is fixedly connected to 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 shunt dual-channel structure 402 connected to the mainstream dual-channel structure 401, 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. The channels are connected; a liquid storage cavity 4501 is provided inside the positioning metal sheet 45; each threaded rod 41 is fastened with an infusion tube 46 in a detachable manner, and the infusion tube 46 is provided with a dual-channel infusion structure 4601 connected to the corresponding shunt dual-channel structure 402, 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.

[0021] The conventional working condition testing steps of a temperature testing device of a rubber tire in a simulated operating state of this embodiment are as follows.

[0022] First, the operator removes the infusion tube 46 and the anti-loosening nut 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 anti-loosening nut 411 and the infusion tube 46 back to the threaded rod 41. At this time, the rubber tire of the tire test group 7 is in close contact with the transmission belt of the belt conveyor 5, and the support roller 51 provides lower support for the rubber tire of the tire test group 7 through the transmission belt of the belt conveyor 5, and all the temperature sensors 43 located on the first fixed rod 42 and the second fixed rod 44 are respectively in close contact with various areas of the rubber tire surface of the tire test group 7, completing the fixing of the tire test group 7 on the fixed rotating shaft 4.

[0023] Afterwards, the operator starts the belt transmission machine 5, and the transmission belt of the belt transmission machine 5 continuously drives the tire test group 7 and the fixed rotating shaft 4 to rotate, so as to perform simulated operation of the rubber tire. During this process, the forward infrared thermometer 2 and the lateral infrared thermometer 3 jointly perform non-contact temperature testing on various positions of the rubber tire to monitor the heat generated at various positions during the operation of the rubber tire. At the same time, the temperature sensors 43 are respectively attached to various areas of the rubber tire surface of the tire test group 7. While the temperature sensor 43 follows the rotation of the tire test group 7, the temperature sensor 43 performs 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.

[0024] In the above temperature test, the external coolant circulation device successively circulates and conveys coolant to the liquid storage cavity 4501 of the positioning metal sheet 45 through the main flow dual-channel structure 401 of the fixed rotating shaft 4, the shunt dual-channel structure 402 of the threaded rod 41, and the infusion tube 46, so that the positioning metal sheet 45 maintains a low temperature state with an obvious difference from the surface temperature of the rubber tire. During the temperature test of the surface of the simulated running rubber tire by the forward infrared thermometer 2, the forward infrared thermometer 2 will continuously record the positions of each positioning metal sheet 45 relative to the surface of the rubber tire at different time periods. The positioning metal sheet 45 is adjacent to the temperature sensors 43 on the same-side first fixed rod 42 and the temperature sensors 43 on the same-side second fixed rod 44. Therefore, based on the position of the positioning metal sheet 45 at a certain time period, the positions of two adjacent temperature sensors 43 relative to the surface of the rubber tire can be quickly located.

[0025] Since the contact temperature test accuracy of the temperature sensor 43 for the rubber tire is higher than the non-contact temperature test accuracy of the forward infrared thermometer 2 and the lateral infrared thermometer 3 for the rubber tire, first, the temperature measured by the temperature sensor 43 for the corresponding area of the rubber tire surface is used as the standard temperature. Then, based on this standard temperature, a correction value is added to the temperatures measured by the forward infrared thermometer 2 and the lateral infrared thermometer 3 in the same area of the rubber tire. The correction value is equal to the temperature value measured by the forward infrared thermometer 2 or the lateral infrared thermometer 3 in the same area of the rubber tire minus the temperature value measured by the temperature sensor 43 in the same area of the rubber tire. When the forward infrared thermometer 2 and the lateral infrared thermometer 3 perform temperature tests on the remaining areas of the rubber tire, adding the corresponding correction value to the measured temperature can obtain a more accurate test temperature. This can not only significantly reduce the temperature value difference between the forward infrared thermometer 2 and the lateral infrared thermometer 3 for testing the same area of the rubber tire, but also improve the temperature test accuracy for each area of the rubber tire.

[0026] As Figure 3 and Figure 9 shown, in this embodiment, an electric control three-way valve 11 is connected to the bottom of the test box 1. One port of the electric control three-way valve 11 is externally connected to a clear water conveying device for conveying clear water, and the other port of the electric control three-way valve 11 is externally connected to a clear water recovery device for discharging clear water; a horizontal slider 61 is slidably connected to the right side inside the test box 1; an electric push rod 62 is installed inside the test box 1; the telescopic end of the electric push rod 62 is fixedly connected to the horizontal slider 61; an inclined baffle 63 inclined upward to the right is fixedly connected to the horizontal slider 61; a water filtering brush 64 is fixedly connected to the left side of the inclined baffle 63.

[0027] The steps for testing the wading condition of a temperature test device for a rubber tire in a simulated running state in this embodiment are as follows.

[0028] When it is necessary to conduct temperature tests on the simulated operation of rubber tires under wading conditions, first complete the fixing of the tire test group 7 on the fixed rotating shaft 4 according to the above steps. Then, the transmission belt of the belt drive 5 continuously drives the tire test group 7 and the fixed rotating shaft 4 to rotate to conduct the simulated operation of the rubber tires. At the same time, the external clean water delivery device delivers clean water into the test box 1 through the electric control three-way valve 11 until the test box 1 submerges the transmission belt of the belt drive 5 and the lower side of the rubber tires. Thus, the simulated operation of the rubber tires under wading conditions can be carried out. At the same time, the forward infrared temperature measuring instrument 2 and the side infrared temperature measuring instrument 3 jointly conduct non-contact temperature tests on each position of the non-wading area of the rubber tires to monitor the heat generated at each position in the non-wading area during the operation of the rubber tires. At the same time, the temperature sensors 43 are respectively attached to each area of the surface of the rubber tires of the tire test group 7, and local contact temperature tests are successively carried out on the corresponding positions of the rubber tires in the non-wading area and the wading area to monitor the heat generated at local positions during the operation of the rubber tires.

[0029] During the simulated operation of the tire test group 7 driven by the belt drive 5, the electric push rod 62 pushes the horizontal slider 61 to drive the inclined baffle 63 to approach the rubber tire to the left until the water filtering brush 64 closely adheres to the rubber tire. The water filtering brush 64 brushes off most of the water attached to the surface of the rubber tire. At the same time, the water splashed up by the rubber tire will also be blocked by the inclined baffle 63, avoiding serious interference of the water attached to the rubber surface and the water splashed up by the rubber tire on the temperature test work of the forward infrared temperature measuring instrument 2 and the side infrared temperature measuring instrument 3. Although the remaining water attached to the surface of the rubber tire will cause slight interference to the temperature test work of the forward infrared temperature measuring instrument 2 and the side infrared temperature measuring instrument 3, based on the positioning function of the above positioning metal sheet 45 and the correction value calculation function of the temperature sensor 43, the interference brought by the remaining water attached to the surface of the rubber tire to the temperature test can be eliminated to the greatest extent, ensuring the effectiveness of the temperature test work results when the rubber tires are simulated to operate under wading conditions.

[0030] Example 2 The difference between this example and Example 1 is that, as Figures 1-9As shown in the figure, an environmental wind simulator 12 for blowing simulated natural wind in the environment onto the surface of the belt component of the belt drive 5 is installed in the test chamber 1 of this embodiment. During the simulated operation of the tire test group 7 driven by the belt drive 5, the environmental wind simulator 12 continuously blows air flow onto the contact area between the belt drive 5 and the tire test group 7. The air flow simulates the natural wind in the environment to perform air cooling treatment on the tire test group 7. At the same time, the environmental wind simulator 12 adjusts the flow rate of the blown air flow according to the rotational speed of the tire test group 7. The higher the rotational speed of the tire test group 7, the faster the simulated vehicle driving speed, and correspondingly, the faster the flow rate of the air flow blown out by the environmental wind simulator 12, effectively testing the air cooling and temperature reduction effect of the rubber tires during the operation of the tire test group 7.

[0031] Embodiment 3 The difference between this embodiment and Embodiment 2 is that, as Figures 1-9 shown in the figure, a wind shield 13 is fixedly connected to the right side inside the test chamber 1 of this embodiment, and the wind shield 13 is located below the lateral infrared thermometer 3 on the same side; a plurality of air outlet groove structures 101 are formed on the right side inside the test chamber 1, and the air outlet groove structures 101 are located below the wind shield 13. During the process of the environmental wind simulator 12 continuously blowing air flow onto the contact area between the belt drive 5 and the tire test group 7, the air flow continuously carries the heat on the surface of the tire test group 7 and flows to the right below the wind shield 13. Under the blockage of the wind shield 13, the air flow carrying heat can only flow out of the test chamber 1 through the air outlet groove structures 101, preventing the heat carried in the air flow from interfering with the normal temperature measurement work of the lateral infrared thermometer 3 during the process of flowing upward to the right through the lateral infrared thermometer 3.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A temperature testing device for a rubber tire under simulated operating conditions, comprising a testing chamber (1); a forward infrared thermometer (2) is installed on the front side of the testing chamber (1); lateral infrared thermometers (3) are installed on the left and right sides of the testing chamber (1). It is characterized in that It further includes a fixed rotating shaft (4); a fixed rotating shaft (4) located behind the forward infrared thermometer (2) is rotatably connected inside the testing chamber (1); a plurality of threaded rods (41) for fixing the tire test group (7) are fixedly connected to the fixed rotating shaft (4); a locknut (411) is fixed on the threaded rod (41); a first fixing rod (42) is fixed between the threaded rod (41) and the locknut (411); a temperature sensor (43) is installed on the first fixing rod (42); a second fixing rod (44) with the same quantity and position corresponding to the first fixing rod (42) is fixedly connected to the fixed rotating shaft (4), and the length of the second fixing rod (44) is longer than that of the first fixing rod (42); a temperature sensor (43) is also installed on the second fixing rod (44); a belt drive (5) for driving the tire test group (7) to simulate operation is installed inside the testing chamber (1); a support roller (51) that provides lower support for the tire test group (7) is rotatably connected inside the testing chamber (1), and the support roller (51) is in close contact with the transmission belt of the belt drive (5).

2. The temperature testing device for a rubber tire under simulated operating conditions according to claim 1, characterized in that, The temperature sensor (43) is jointly 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 second fixing rod (44); a contact thermometer (432) is slidably connected inside the housing (431); a spring (433) is jointly fixedly connected between the contact thermometer (432) and the housing (431).

3. A temperature testing device for a rubber tire under simulated operating conditions according to claim 1, characterized in that, A positioning metal sheet (45) is fixedly connected to the front side of the first fixing rod (42).

4. The temperature testing device for a rubber tire under simulated operating conditions according to claim 3, wherein A main flow double-channel structure (401) is provided in the fixed rotating shaft (4); a shunt double-channel structure (402) that connects to the main flow double-channel structure (401) is provided in the threaded rod (41), and the two channels of the shunt double-channel structure (402) are respectively connected to the corresponding channels in the main flow double-channel structure (401); a liquid storage cavity (4501) is provided inside the positioning metal sheet (45); an infusion tube (46) is detachably and fixedly connected to the threaded rod (41), a double-channel infusion structure (4601) that connects to the corresponding shunt double-channel structure (402) is provided in the infusion tube (46), and the two channels of the double-channel infusion structure (4601) of the infusion tube (46) are respectively connected to the corresponding channels in the shunt double-channel structure (402); the two channels of the double-channel infusion structure (4601) of the infusion tube (46) are connected to the liquid storage cavity (4501) of the corresponding positioning metal sheet (45).

5. A temperature testing device for a rubber tire under simulated operating conditions according to claim 1, characterized in that, An electric control three-way valve (11) is connected to the bottom of the testing chamber (1).

6. The temperature testing device for a rubber tire under simulated operating conditions according to claim 1, characterized in that, A horizontal slider (61) is slidably connected to the inner right side of the testing chamber (1); an electric push rod (62) for pushing the horizontal slider (61) to move is installed inside the testing chamber (1); an inclined baffle (63) is fixedly connected to the horizontal slider (61).

7. A temperature testing device for a rubber tire under simulated operating conditions according to claim 6, characterized in that, The inclined baffle plate (63) is fixedly connected with a water filtering brush (64) for brushing off the residual moisture on the surface of the tire test group (7).

8. A temperature testing device for a rubber tire under simulated operating conditions according to any one of claims 1-7, characterized in that, An environmental wind simulator (12) is installed in the test chamber (1).

9. The temperature testing device for a rubber tire under simulated operating conditions according to claim 8, characterized in that, A wind shield (13) is fixedly connected to the right side inside the test chamber (1), and the wind shield (13) is located below the lateral infrared thermometer (3) on the same side.

10. The temperature testing device for a rubber tire under simulated operating conditions according to claim 9, characterized in that, A plurality of air outlet groove structures (101) are formed on the right side inside the test chamber (1), and the air outlet groove structures (101) are located below the wind shield (13).

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