High-temperature durability test equipment and test method for rubber product

Abstract

The invention provides rubber product high-temperature durability test equipment and a rubber product high-temperature durability test method, and belongs to the technical field of rubber testing. The rubber product high-temperature endurance test equipment comprises an environment bin module and a temperature control module, the environment bin module comprises a box body, a fixing tool used for installing a rubber product and at least one loading device, the box body is provided with a door body capable of being opened and closed, an air inlet, an air outlet and at least one loading port, the fixing tool is arranged in the box body, and the loading port is arranged in the box body. The loading device comprises a driving device, a loading rod and a load sensor, one end of the loading rod is connected with the driving device, and the other end of the loading rod extends into the box body through the loading port and is configured to apply loading force to the rubber product; the temperature control module comprises a fan, an air heating device, a ventilation assembly, a temperature sensor and a controller, the fan is provided with an air inlet channel and an air outlet channel, the air outlet channel is communicated with the air heating device and the air inlet, the air inlet channel is communicated with the air outlet, and the ventilation assembly is arranged on the air inlet channel.

Description

Technical Field

[0001] The invention relates to the technical field of rubber testing, and in particular to high temperature durability testing equipment and a testing method for rubber products. Background Art

[0002] When conducting fatigue durability tests on rubber parts on vehicles, a load application device (such as MTS equipment) is generally used to apply a durability load, but the load application device is in a room temperature environment, so fatigue durability tests can only be performed at room temperature, and the test temperature is easily affected by changes in the external ambient temperature. Rubber suspension parts are generally located in the engine compartment or near heat sources. Affected by heat transfer or heat radiation, their working temperature and the temperature of the working environment are usually higher than room temperature, and the fatigue durability life of rubber structures is greatly affected by temperature.

[0003] like Figure 1-2 As shown, the prior art (Chinese patent publication number CN212780594U) provides a multi-station rubber layer fatigue resistance test device, which is constructed as follows: a base 1', a box 6' and a door 3' together form a closed cavity, a heating plate 9' for heating the rubber, a pressure component for applying pressure to the rubber and a stretching component are respectively arranged in the cavity. Its working principle is:

[0004] The rubber to be tested is placed on the top of the heating plate 9', the box door 3' is closed, and the heating plate 9' is powered on and started, and the heating plate 9' continuously heats the rubber; the cylinder 17' drives the slide rail 18' to move downward, and the rubber is pressurized by the second slider 19' and the first slider 8'; the motor 11' applies a constant torque to the gear 22' through the action of the torque converter 12', and applies a certain force to the first rack 13' and the second rack 21' respectively through the meshing action, so as to apply a certain tensile force to the rubber through the two first sliders 8'; the joint action can complete the test of the high temperature resistance of the rubber in the natural state, the high temperature resistance of the rubber in the pressure state, and the high temperature resistance of the rubber in the tensile state.

[0005] Although the above-mentioned prior art provides a solution of placing the heating plate, the pressure component and the stretching component in a closed cavity respectively to avoid affecting the temperature, the heating plate can only heat the rubber on one side and cannot heat the entire rubber evenly. Since the heat generated by the rubber parts on the vehicle (such as in the engine compartment of the vehicle) after the high-speed operation of the engine, motor, etc. is evenly transferred to the rubber parts in the compartment through air convection, so that the rubber parts are evenly heated as a whole, the above-mentioned existing equipment still cannot simulate the actual working conditions of the rubber product in the engine compartment, resulting in the test results being inconsistent with the vehicle road test results, and the durability of the rubber structure cannot be accurately evaluated and verified. Therefore, it is necessary to provide suitable test equipment for the high-temperature durability performance test of automotive rubber products. Summary of the invention

[0006] The object of the present invention is to provide a high-temperature durability testing device for rubber products, which can simulate the engine compartment environment of a vehicle, thereby accurately evaluating and verifying the durability life of a rubber structure.

[0007] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0008] According to one aspect of the present invention, a high-temperature durability test device for rubber products is provided, including an environmental chamber module and a temperature control module. The environmental chamber module includes a box body, a fixed tooling for installing the rubber product and at least one loading device. The box body has an openable and closable door body, an air inlet, an air outlet and at least one loading port. The fixed tooling is arranged in the box body. The loading device includes a driving device, a loading rod and a load sensor. One end of the loading rod is connected to the driving device, and the other end of the loading rod extends into the box body through the loading port and is configured to apply a loading force to the rubber product. The load sensor is arranged on the loading rod or the loading device; the temperature control module includes a fan, an air heating device, a ventilation component, a temperature sensor and a controller. The fan has an air inlet channel and an air outlet channel. The air outlet channel is connected to the air inlet and the air heating device respectively. The air inlet channel is connected to the air outlet. The temperature sensor is arranged in the box body. The temperature sensor, the load sensor, the loading device, the fan and the air heating device are electrically connected to the controller respectively. The ventilation component is arranged on the air inlet channel. The ventilation component is configured to guide the hot air in the box body to the outside and guide the outside air into the box body when the heating is completed.

[0009] According to one embodiment of the present invention, it also includes a flexible sealing tube that can be telescopically deformed, one end of the flexible sealing tube is connected to the loading port, and the other end of the flexible sealing tube is sealingly sleeved on the loading rod.

[0010] According to one embodiment of the present invention, the flexible sealing tube includes a first flange, a retractable bellows, a second flange and a rod sleeve, the first flange and the second flange are respectively fixed to the two ends of the bellows, the loading port is provided with an annular connecting seat, the first flange is connected to the annular connecting seat, the rod sleeve is fixed to the second flange, and the rod sleeve is fixed to the loading rod sleeve.

[0011] According to one embodiment of the present invention, when there are two loading devices, the two loading devices are respectively arranged on the side and the top of the box, and the two loading devices respectively apply horizontal loading force and vertical loading force to the rubber product. There are two loading ports correspondingly, and the two loading ports are respectively located on the side and the top of the box.

[0012] According to one embodiment of the present invention, the fixing tool includes a base and a bracket which are adjustable laterally and longitudinally, the base is arranged at the bottom of the box, the bracket is adjustably mounted on the base, and the bracket has a mounting portion for fixing the rubber product.

[0013] According to an embodiment of the present invention, a connecting piece is provided at one end of the loading rod located in the box body, and the loading rod is detachably connected to the rubber product through the connecting piece.

[0014] According to one embodiment of the present invention, a heating tool is further included. The heating tool is arranged on the bracket and is configured to locally heat the rubber product.

[0015] According to one embodiment of the present invention, the ventilation component includes a circulation valve, a ventilation pipe, a ventilation valve, an exhaust pipe and an exhaust valve, the circulation valve, the ventilation pipe and the exhaust pipe are respectively arranged on the air inlet channel, and the circulation valve is located between the ventilation pipe and the exhaust pipe, and the valve of the circulation valve is configured to open during heating and close during heat dissipation; the ventilation valve is installed on the ventilation pipe, and the exhaust valve is installed on the exhaust pipe, and the exhaust valve and the ventilation valve are both configured to close during heating and open during heat dissipation.

[0016] According to one embodiment of the present invention, the temperature control module further comprises a heat exchange device having a cold medium and an air flow channel therein, the air flow channel being connected to the exhaust port of the exhaust pipe, and the heat exchange device being configured to reduce the temperature of the exhaust air.

[0017] The present invention also discloses a high temperature durability test method for a rubber product, which is applied to the above-mentioned high temperature durability test equipment for a rubber product. The test method comprises:

[0018] Install the rubber product on the fixed fixture and close the door;

[0019] Turn on the air heating device and fan, and the temperature sensor detects the temperature inside the box in real time, and the temperature inside the box is maintained at T 设 ;

[0020] The loading device applies N times of horizontal load or displacement load to the rubber, and applies continuous sinusoidal pressure load or displacement load;

[0021] Alternatively, the loading device applies N times of vertical load or displacement load to the rubber and applies a continuous sinusoidal pressure load or displacement load;

[0022] Alternatively, there are two loading devices, which are respectively referred to as a first loading device and a second loading device, wherein the first loading device applies N times of X-direction horizontal load or displacement load to the rubber, and the second loading device applies N times of Y-direction horizontal load or displacement load to the rubber; or, the first loading device applies N times of horizontal load or displacement load to the rubber, and the second loading device applies N times of vertical load or displacement load to the rubber;

[0023] When the preset number of loadings is completed, the loading device and the air heating device are turned off;

[0024] The ventilation component discharges the hot air in the box to the outside and introduces the outside air into the box;

[0025] When the temperature sensor detects that the temperature inside the box drops to T 设 When the fan is turned off, the test is completed;

[0026] The rubber is removed and the length and depth of the cracks in the rubber are tested.

[0027] An embodiment of the present invention has the following advantages or beneficial effects:

[0028] A high-temperature durability test device for rubber products of the present invention comprises an environmental chamber module and a temperature control module. The environmental chamber module comprises a box body, a fixed tool for installing the rubber product and at least one loading device. The box body has an openable and closable door body, an air inlet, an air outlet and at least one loading port. The fixed tool is arranged in the box body. The loading device comprises a driving device, a loading rod and a load sensor. One end of the loading rod is connected to the driving device, and the other end of the loading rod extends into the box body through the loading port and is configured to apply a loading force to the rubber product. The load sensor is arranged on the loading rod or the loading device; the temperature control module comprises a fan, an air heating device, a ventilation component, a temperature sensor and a controller. The fan has an air inlet channel and an air outlet channel. The air outlet channel is connected to the air inlet and the air heating device respectively. The air inlet channel is connected to the air outlet. The air heating device is arranged on the air outlet passage, the temperature sensor is arranged in the box body, the temperature sensor, the load sensor, the loading device, the fan and the air heating device are electrically connected to the controller respectively, the ventilation component is arranged on the air inlet passage, and the ventilation component connects the fan with the box body during the heating test, so that the ventilation component connects the air inlet passage, the fan, the air heating device, the air outlet passage and the box body to form a hot air circulation passage, so that the temperature in the box body is maintained at a preset temperature threshold, and the circulating airflow in the box body uniformly heats the entire rubber product, so as to simulate the environment in the engine compartment, thereby realizing accurate evaluation and verification of the durability life of the rubber structure; when the heating test is finished, the ventilation component guides the hot air in the box body to the outside and guides the outside air into the box body, so as to quickly dissipate heat to the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0030] Figure 1 It is a stereogram of the prior art.

[0031] Figure 2 It is a partial stereogram of the prior art.

[0032] Figure 3FIG. 4 is a schematic diagram showing a loading device loading a rubber product from a horizontal direction according to an exemplary embodiment of the present invention.

[0033] Figure 4 FIG. 4 is a perspective view of a box according to an exemplary embodiment of the present invention.

[0034] Figure 5 FIG. 4 is a schematic diagram showing two loading devices loading a rubber product from a horizontal direction and a vertical direction respectively according to an exemplary embodiment of the present invention.

[0035] Figure 6 FIG. 4 is another side view of a temperature control module according to an exemplary embodiment of the present invention.

[0036] Figure 7 FIG. 4 is a top view of a temperature control module according to an exemplary embodiment of the present invention.

[0037] Figure 8 FIG. 4 is a perspective view of a fixing tool according to an exemplary embodiment of the present invention.

[0038] Fig. 9 FIG. 1 is a schematic diagram showing a heating tool installed according to an exemplary embodiment of the present invention.

[0039] Fig.10 yes Fig. 9 A partial enlarged view of .

[0040] The accompanying drawings of the present invention are described as follows:

[0041] 1. Environmental chamber module; 11. Box; 111. Air inlet; 112. Air outlet; 113. Loading port; 1131. Ring connecting seat; 1132. Blocking plate; 114. Support foot; 1141. Square base; 115. Wire hole; 12. Fixing tool; 121. Base; 1211. First mounting rail; 12111. First strip hole; 1212. Second mounting rail; 12121. Second strip hole; 122. Bracket; 13. Loading rod; 131. Connector; 1311. First connecting part; 1312. Second connecting part;

[0042] 2. Temperature control module; 21. Fan; 211. Air inlet channel; 212. Air outlet channel; 22. Air heating device; 23. Ventilation component; 231. Circulation valve; 232. Ventilation pipe; 233. Ventilation valve; 234. Exhaust pipe; 235. Exhaust valve; 24. Controller; 25. Heat exchange device; 26. Trolley;

[0043] 3. Flexible sealing tube; 31. First flange; 32. Bellows; 33. Second flange; 34. Rod sleeve;

[0044] 4. Heating tooling; 41. Power cord;

[0045] 5. Rubber products. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0047] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0048] like Figure 3-10 As shown, a high-temperature durability testing device for rubber products according to an embodiment of the present invention includes an environmental chamber module 1 and a temperature control module 2 .

[0049] The environmental chamber module 1 comprises a box body 11 , a fixing fixture 12 for mounting the rubber product 5 , and at least one loading device.

[0050] The box body 11 is fixed on the ground or a table, and the box body 11 has an openable and closable door, an air inlet 111 , an air outlet 112 , and at least one loading port 113 .

[0051] The loading port 113 is located on the side wall or the top wall of the box body 11 . When there are two loading ports 113 , the two loading ports 113 are located on the side wall and the top wall of the box body 11 respectively.

[0052] The fixing device 12 is disposed in the box body 11 , and the rubber product 5 is detachably mounted on the fixing device 12 .

[0053] The loading device includes a driving device, a loading rod 13 and a load sensor. The driving device is any one of a pneumatic cylinder, a hydraulic cylinder and an electric telescopic cylinder.

[0054] One end of the loading rod 13 is connected to the driving device, and the other end of the loading rod 13 extends into the box 11 through the loading port 113 and is configured to apply a loading force to the rubber product 5 to test the fatigue resistance of the rubber product 5. The load sensor is set on the loading rod 13 or the loading device to measure the loading force.

[0055] The temperature control module 2 includes a fan 21 , an air heating device 22 , a ventilation component 23 , a temperature sensor and a controller 24 .

[0056] The fan 21 has an air inlet channel 211 and an air outlet channel 212. The air inlet channel 211 is connected to the air outlet 112. The air outlet channel 212 is respectively connected to the air inlet 111 and the air heating device 22. The air heating device 22 is located between the fan 21 body and the box body 11. The air inlet channel 211 and the air outlet channel 212 are both pipes that can be removed from the fan 21 body.

[0057] The air heating device 22 is configured to heat the passing air. For example, the air heating device 22 includes a cylindrical shell and an annular electric heating element arranged in the cylindrical shell. The two ends of the cylindrical shell are respectively connected to the air outlet of the fan 21 and the air outlet channel 212. When the air flow is blown into the cylindrical shell from the air outlet of the fan 21, the annular electric heating element heats the passing air flow, and then enters the box body 11 through the air outlet channel 212.

[0058] The temperature sensor is disposed in the box 11, and the temperature sensor is configured to detect the temperature in the box 11. The temperature sensor, the load sensor, the loading device, the fan 21 and the air heating device 22 are electrically connected to the controller 24 respectively to achieve precise and automatic control and improve the test efficiency.

[0059] The ventilation component 23 is disposed on the air inlet channel 211 . The ventilation component 23 is configured to connect the fan 21 with the box 11 during the heating test, and to discharge the hot air in the box 11 to the outside and introduce the outside air into the fan 21 when the heating test is finished.

[0060] During the test, the ventilation component 23 is in the initial state. In the initial state, the ventilation component 23 connects the air inlet channel 211, the fan 21, the air outlet channel 212 and the box 11 to form a hot air circulation channel, so that the temperature in the box 1 is maintained at a preset temperature threshold. The circulating airflow in the box 11 evenly heats the entire rubber product 5 to simulate the environment in the engine compartment. The fatigue resistance of the rubber product 5 is tested in this environment, thereby improving the accuracy of the test results, and then accurately evaluating and verifying the durability of the rubber structure.

[0061] When the preset loading and heating procedures are completed, the loading device and the air heating device 22 are turned off, and the ventilation component 23 introduces the cool air from the outside into the fan 21, the air outlet channel 212, and the box 11 in sequence through the air inlet channel 211, and guides the hot air in the box 11 to the outside through the air inlet channel 211, so as to quickly reduce the temperature in the box 11 and avoid burns to the test personnel when removing the rubber product, thereby improving the safety of the test and the cooling efficiency.

[0062] like Figure 8-10As shown, in a preferred embodiment of the present invention, a connecting piece 131 is provided at one end of the loading rod 13 located in the box body, and the connecting piece 131 includes a first connecting portion 1311 and a second connecting portion 1312. The first connecting portion 1311 is used for detachable fixation with the loading rod 13, and the second connecting portion 1312 is used for detachable fixation with the rubber product 5, so that the loading rod 13 applies a loading force to the rubber product 5 through the connecting piece 131.

[0063] For example, the first connection part 1311 is a threaded rod, and one end of the loading rod 13 has a threaded hole that matches the threaded rod; the second connection part 1312 is connected to the rubber product 5 through a bolt.

[0064] Of course, the loading rod 13 may also directly abut against the rubber product 5 without the connecting piece 131 , and those skilled in the art may choose whether to add the connecting piece 131 according to actual loading needs.

[0065] like Figure 4 As shown, in a preferred embodiment of the present invention, four supporting feet 114 are designed at the bottom of the box 11, and a square base 1141 is welded at the bottom of the supporting feet 114. The square base 1141 can be clamped by a clamp on the ground, so that the box 11 is fixed on the test platform. Alternatively, a plurality of fixing holes are opened on the square base 1141, and the square base 1141 is fixed to the test platform by bolts, so that the box 11 can be flexibly installed on different test platforms.

[0066] In a preferred embodiment of the present invention, a plurality of mounting holes are provided on the bottom wall of the box body 11 , and the fixing tool 12 is fixed to the bottom wall of the box body 11 by bolts, thereby installing and fixing the fixing tool 12 .

[0067] like Figure 3-5 As shown, in a preferred embodiment of the present invention, it also includes a telescopically deformable flexible sealing tube 3, one end of the flexible sealing tube 3 is connected to the loading port 113, and the other end of the flexible sealing tube 3 is sealed and sleeved on the loading rod 13.

[0068] When the loading rod 13 is loaded axially or loaded by axial and radial shaking, the flexible sealing tube 3 can be driven by the loading rod 13 to expand and contract axially or deform radially, so as to achieve both normal loading of the rubber product 5 and maintain the seal between the loading port 113 and the loading rod 13, ensuring that hot air does not leak and avoiding affecting the test environment.

[0069] like Figure 3-5 As shown, in a preferred embodiment of the present invention, the flexible sealing tube 3 includes a first flange 31 , a telescopic bellows 32 , a second flange 33 and a rod sleeve 34 .

[0070] The bellows 32 can stretch and contract axially and can have a longer displacement stroke, thereby meeting the stroke requirements of different load inputs.

[0071] The first flange 31 and the second flange 33 are respectively fixed to the two ends of the bellows 32 in the axial direction. The loading port 113 is provided with an annular connecting seat 1131 , and the first flange 31 is sealedly connected to the annular connecting seat 1131 .

[0072] The through hole of the second flange 33 is matched with the diameter of the loading rod 13 , and the rod sleeve 34 is fixed to the second flange 33 by bolts or welding, and the rod sleeve 34 is sleeved and fixed to the loading rod 13 .

[0073] The rod sleeve 34 includes a first mounting block and a second mounting block, both of which have an arc groove. The first mounting block and the second mounting block are detachably fixed by bolts, and the two arc grooves jointly seal and clamp the loading rod 13 to achieve fixation with the loading rod 13 and sealing of the box body 11 to prevent heat leakage.

[0074] When the rubber product 5 is loaded, the loading rod 13 drives the rod sleeve 34 and the second flange 33 to move axially, and at the same time, the bellows 32 is axially extended or contracted.

[0075] like Figure 5 As shown, in a preferred embodiment of the present invention, when there are two loading devices, the two loading devices are respectively arranged on the side and the top of the box body 11, and there are two loading ports 113 accordingly, and the two loading ports 113 are respectively located on the side and the top of the box body 11.

[0076] The two loading devices apply horizontal loading force and vertical loading force (vertical loading force) to the rubber product 5 respectively, so as to realize fatigue resistance test of the rubber product 5 in two directions.

[0077] Of course, the number of loading devices is not limited to two, and may be 3-10. Those skilled in the art may select the number of loading devices according to actual needs. For example, when there are six loading devices, the six loading devices are respectively installed on the six surfaces of the box 11 to achieve fatigue resistance testing of the rubber product 5 in six directions.

[0078] like Figure 4 As shown, if only one loading device is needed for horizontal loading in certain test items, the loading device on the top can be removed and fixed to the annular connecting seat 1131 through a blocking plate 1132 to close the loading port 113 on the top of the box body 11 .

[0079] like Figure 3 , 8As shown, in a preferred embodiment of the present invention, the fixed tool 12 includes a base 121 and a bracket 122. The base 121 can be adjusted laterally and longitudinally at the bottom of the box body 11, and the bracket 122 can be adjustably installed on the base 121 to achieve flexible adjustment of the position of the bracket 122 to meet the test requirements of rubber products of various specifications.

[0080] The bracket 122 has a mounting portion for fixing the rubber product 5, for example, Figure 3 , 8 As shown, the bottom of the bracket 122 is fixed on the base 121, and the top of the bracket 122 has a mounting groove, and the two side walls of the mounting groove are correspondingly provided with mounting holes for the pins or bolts to pass through. When installing the rubber product 5, the through hole on the rubber product 5 is aligned with the mounting hole, and the pin or bolt is passed through the mounting hole and the through hole of the rubber product 5 to fix the rubber product 5.

[0081] Of course, the method for fixing the rubber product 5 is not limited to the above-mentioned embodiment. Fig. 9 , 10 As shown, the rubber product 5 can also be fixed to the side of the bracket 122 by bolts, and those skilled in the art can flexibly install it according to factors such as the shape and loading direction of the rubber product.

[0082] like Figure 8 As shown, in a preferred embodiment of the present invention, the base 121 includes two parallel and transversely arranged first mounting rails 1211, two parallel and longitudinally arranged second mounting rails 1212, a plurality of first bolts, a plurality of second bolts and a plurality of third bolts.

[0083] The cross-sections of the first mounting rail 1211 and the second mounting rail 1212 are both C-shaped.

[0084] The two first mounting rails 1211 are respectively fixed to the bottom of the box body 11 , and the bottom wall and the top wall of the first mounting rail 1211 both have a first strip hole 12111 . The bottom wall of the first mounting rail 1211 is adjustably mounted on the bottom wall of the box body 11 by a first bolt.

[0085] The bottom wall and the top wall of the second mounting rail 1212 both have a second strip-shaped hole 12121 , and the bottom wall of the second mounting rail 1212 is adjustably mounted on the top wall of the first mounting rail 1211 by means of a second bolt.

[0086] A mounting through hole is provided at the bottom of the bracket 122 corresponding to the second strip-shaped hole 12121 , and the bracket 122 is adjustably mounted on the top wall of the second mounting rail 1212 by a third bolt.

[0087] For example, when adjusting the position of the bracket 122 , the third bolt can be loosened to slide along the second strip hole 12121 on the top wall of the second mounting rail 1212 , and the position of the bracket 122 can be fixed by tightening the third bolt.

[0088] In a preferred embodiment of the present invention, the fixing tool 12 further includes a support leg, which is fixed to the bottom wall of the box body 11 , and the base 121 is installed on the support leg in an adjustable manner to achieve the adjustment of the bracket 122 up and down.

[0089] like Fig. 9 , 10 As shown, in a preferred embodiment of the present invention, a heating tool 4 is further included, and the heating tool 4 is arranged on the bracket 122, and the heating tool 4 is configured to further heat the part of the rubber product 5. The heating tool 4 simulates the scene when the rubber product contacts with the heat source such as the engine and the exhaust pipe in the engine compartment, and the heat is transferred from the heat source to the rubber product, so as to further improve the fidelity of the environmental simulation, and further improve the accuracy of the evaluation and verification.

[0090] For example, the heating tool 4 is an electric heating plate, which has the same or similar structure as the heat source such as the engine and the exhaust pipe. The heating tool 4 is electrically connected to the controller 24 through a relay, such as Figure 4 , 9 As shown, a wire hole 115 is opened on the top or side of the box body 11 , and the power line 41 of the heating tool 4 has high temperature resistance. The power line 41 of the heating tool 4 extends into the box body 11 through the wire hole 115 .

[0091] like Figure 6 As shown, in a preferred embodiment of the present invention, the ventilation component 23 includes a circulation valve 231, a ventilation pipe 232, a ventilation valve 233, an exhaust pipe 234 and an exhaust valve 235.

[0092] The circulation valve 231 , the ventilation pipe 232 and the exhaust pipe 234 are respectively arranged on the air inlet channel 211 , and the circulation valve 231 is located between the ventilation pipe 232 and the exhaust pipe 234 , the ventilation valve 233 is installed on the ventilation pipe 232 , and the exhaust valve 235 is installed on the exhaust pipe 234 .

[0093] During the high temperature durability test, the circulation valve 231 is opened, and the exhaust valve 235 and the ventilation valve 233 are closed, so that the air inlet channel 211, the motor 21, the air heating device 22, the air outlet channel 212 and the box body 11 together form a hot air circulation channel to ensure that the temperature in the box body 11 is kept at a constant temperature. Since the exhaust valve 235 and the ventilation valve 233 are closed, hot air is prevented from leaking out.

[0094] When loading and heating are finished, the valve of the circulation valve 231 is closed to block the connection between the box 11 and the motor 21, and the exhaust valve 235 and the ventilation valve 233 are opened, so that the outside air enters the ventilation pipe 232, the air inlet channel 211, the motor 21, the air heating device 22, the air outlet channel 212 and the box 11 in sequence, and the hot air in the box 11 is discharged to the outside through the air inlet channel 211 and the exhaust pipe 234, so as to achieve rapid cooling of the temperature of the box 11, avoid long waiting time, and improve the test efficiency.

[0095] In a preferred embodiment of the present invention, the circulation valve 231, the ventilation valve 233 and the exhaust valve 235 are all electric valves, and are electrically connected to the controller 24 respectively to achieve automatic opening and closing without manual operation, thereby reducing the test cost.

[0096] like Figure 3 , 6 As shown, in a preferred embodiment of the present invention, the temperature control module 2 also includes a heat exchange device 25, which includes a shell, an air flow channel arranged in the shell, and water or other cold medium. The air flow channel is connected to the exhaust port of the exhaust pipe 234. The water or other cold medium is used to reduce the temperature of the exhaust air passing through the air flow channel, thereby reducing the risk of heat damage of the circulating air to the external environment.

[0097] For example, the air flow channel is arranged in a serpentine shape in the housing to extend the travel of the air flow in the heat exchange device 25, so that the exhaust air can fully exchange heat with water or other cold media.

[0098] like Figure 3 , 5 As shown in Figure 6, in a preferred embodiment of the present invention, the temperature control module 2 also includes a trolley 26, and the heat exchange device 25, the fan 21, the air heating device 22, the ventilation component 23 and the controller 24 are respectively arranged on the trolley 26. The wheels of the trolley 26 are lockable wheels, which are convenient for moving and fixing the trolley. The placement position of the trolley can be flexibly adjusted according to the installation position of the environmental chamber module without occupying the test platform space.

[0099] Of course, the temperature control module 2 can also be fixed on the floor of the laboratory or on a stand, and those skilled in the art can choose to install the temperature control module 2 according to actual needs.

[0100] The present invention also provides a high temperature durability test method for a rubber product, which is applied to the above-mentioned high temperature durability test equipment for a rubber product. The test method comprises:

[0101] Install the rubber product 5 on the fixed fixture 12 and close the door;

[0102] When the ventilation component 23 is set to the heating test;

[0103] The air heating device 22 and the fan 21 are turned on, and the temperature sensor detects the temperature in the box 11 in real time, and the temperature in the box 11 is maintained at T 设1 , for example, T 设1 The temperature range is 50-150 degrees Celsius;

[0104] The loading device applies N times of horizontal load or displacement load to the rubber through the loading rod 13, and applies continuous sinusoidal pressure load or displacement load. For example, the loading device applies 100-200000 times of horizontal load or displacement load to the rubber through the loading rod 13, and the load sensor detects the loading data in real time and transmits it to the controller 24;

[0105] Alternatively, the loading device applies N times of vertical load or displacement load to the rubber through the loading rod 13, and applies a continuous sinusoidal pressure load or displacement load;

[0106] Alternatively, there are two loading devices, which are respectively recorded as a first loading device and a second loading device, wherein the first loading device applies N times of X-direction horizontal load or displacement load to the rubber through the loading rod 13, and the second loading device applies N times of Y-direction horizontal load or displacement load to the rubber through the loading rod 13; or, the first loading device applies N times of horizontal load or displacement load to the rubber, and the second loading device applies N times of vertical load or displacement load to the rubber;

[0107] When the preset number of loadings is completed, the loading device and the air heating device 22 are turned off;

[0108] The ventilation component 23 discharges the hot air in the box body 11 to the outside and introduces the cool air from the outside for cooling into the box body 11;

[0109] When the temperature sensor detects that the temperature inside the box 11 drops to T 设2 When the fan 21 is turned off, the test is completed; for example, T 设2 It is at or close to room temperature.

[0110] The rubber is removed and the length and depth of the cracks in the rubber are tested.

[0111] The test method of the present invention, due to its application in the above-mentioned test equipment, keeps the temperature in the box 11 at a preset temperature threshold, and the circulating airflow in the box 11 evenly heats the entire rubber product 5, thereby simulating the environment in the engine compartment, and further accurately evaluating and verifying the durability of the rubber structure. When the heating test is completed, the ventilation component of this test method guides the hot air in the box to the outside and guides the outside air into the box, thereby quickly dissipating the heat of the box.

[0112] In the embodiments of the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0113] In the description of the embodiments of the present invention, it needs to be understood that the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0114] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature durability test equipment for rubber products, characterized in that: include: An environmental chamber module (1), the environmental chamber module (1) comprising a box (11), a fixing tool (12) for installing a rubber product, and at least one loading device, the box (11) having an openable and closable door, an air inlet (111), an air outlet (112), and at least one loading port (113), the fixing tool (12) being arranged in the box (11), the loading device comprising a driving device, a loading rod (13), and a load sensor, one end of the loading rod (13) being connected to the driving device, the other end of the loading rod (13) extending into the box (11) through the loading port (113) and being configured to apply a loading force to the rubber product, and the load sensor being arranged on the loading rod (13) or the loading device; The temperature control module (2) comprises a fan (21), an air heating device (22), a ventilation component (23), a temperature sensor and a controller (24); the fan (21) has an air inlet channel (211) and an air outlet channel (212); the air outlet channel (212) is connected to the air heating device (22) and the air inlet (111) respectively; the air inlet channel (211) is connected to the air outlet (112); the temperature sensor is arranged in the box (11); the temperature sensor, the load sensor, the loading device, the fan (21) and the air heating device (22) are respectively electrically connected to the controller (24); the ventilation component (23) is arranged on the air inlet channel (211); the ventilation component (23) is configured to discharge the hot air in the box (11) to the outside and to introduce the outside air into the box (11) when heating is completed.

2. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: It also comprises a flexible sealing tube (3) that can be telescopically deformed, one end of the flexible sealing tube (3) being in communication with the loading port (113), and the other end of the flexible sealing tube (3) being sealingly sleeved on the loading rod (13).

3. The high temperature durability testing equipment for rubber products according to claim 2, characterized in that: The flexible sealing tube (3) comprises a first flange (31), a telescopic bellows (32), a second flange (33) and a rod sleeve (34); the first flange (31) and the second flange (33) are respectively fixedly connected to two ends of the bellows (32); the loading port (113) is provided with an annular connecting seat (1131); the first flange (31) is connected to the annular connecting seat (1131); the rod sleeve (34) is fixedly connected to the second flange (33); and the rod sleeve (34) is sleeved and fixedly connected to the loading rod (13).

4. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: When there are two loading devices, the two loading devices are respectively arranged on the side and the top of the box (11), and the two loading devices respectively apply horizontal loading force and vertical loading force to the rubber product. There are correspondingly two loading ports (113), and the two loading ports (113) are respectively located on the side and the top of the box (11).

5. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: A connecting piece (131) is provided at one end of the loading rod (13) located inside the box body (1), and the loading rod (13) is detachably connected to the rubber product via the connecting piece (131).

6. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: The fixing tool (12) comprises a base (121) and a bracket (122) which are adjustable in the transverse and longitudinal directions; the base (121) is arranged at the bottom of the box body (11); the bracket (122) is adjustably mounted on the base (121); and the bracket (122) has a mounting portion for fixing the rubber product.

7. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: It also comprises a heating tool (4), wherein the heating tool (4) is arranged on the fixing tool (12), and the heating tool (4) is configured to locally heat the rubber product.

8. The high temperature durability testing equipment for rubber products according to claim 1, characterized in that: The ventilation component (23) comprises a circulation valve (231), a ventilation pipe (232), a ventilation valve (233), an exhaust pipe (234) and an exhaust valve (235); the circulation valve (231), the ventilation pipe (232) and the exhaust pipe (234) are respectively arranged on the air inlet channel (211), and the circulation valve (231) is located between the ventilation pipe (232) and the exhaust pipe (234); the valve of the circulation valve (231) is configured to be opened during a heating test and closed when the heating test is finished; the ventilation valve (233) is installed on the ventilation pipe (232), and the exhaust valve (235) is installed on the exhaust pipe (234); the exhaust valve (235) and the ventilation valve (233) are both configured to be closed during a heating test and opened when the heating test is finished.

9. The high temperature durability testing equipment for rubber products according to claim 8, characterized in that: The temperature control module further comprises a heat exchange device (25), wherein the heat exchange device (25) has a cold medium and an air flow channel, wherein the air flow channel is connected to the exhaust port of the exhaust pipe (234), and the heat exchange device (25) is configured to reduce the temperature of the exhaust air.

10. A high temperature durability test method for rubber products, characterized in that: Applicable to the rubber product high temperature durability test equipment according to any one of claims 1 to 9, the test method comprising: Installing the rubber product on the fixing fixture (12) and closing the door; The air heating device (22) and the fan (21) are turned on, and the temperature sensor detects the temperature inside the box (11) in real time, and the temperature inside the box (11) is maintained at T 设1 ; The loading device applies N times of horizontal load or displacement load to the rubber, and applies continuous sinusoidal pressure load or displacement load; Alternatively, the loading device applies N times of vertical load or displacement load to the rubber, and applies continuous sinusoidal pressure load or displacement load; Alternatively, there are two loading devices, which are respectively referred to as a first loading device and a second loading device, wherein the first loading device applies N times of X-direction horizontal load or displacement load to the rubber, and the second loading device applies N times of Y-direction horizontal load or displacement load to the rubber; or, the first loading device applies N times of horizontal load or displacement load to the rubber, and the second loading device applies N times of vertical load or displacement load to the rubber; When the preset number of loadings is completed, the loading device and the air heating device (22) are turned off; The ventilation component (23) discharges the hot air in the box (11) to the outside and introduces the outside air into the box (11); When the temperature sensor detects that the temperature inside the box (11) drops to T 设2 When the fan (21) is turned off, the test is completed; The rubber is removed and the length and depth of the cracks in the rubber are tested.

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