A liquid silica gel product performance detection device for new energy vehicles

Abstract

The present application belongs to the technical field of automobile accessory detection, and particularly relates to a liquid silicone product performance detection device for new energy vehicles, which comprises a detection table and an industrial control cabinet installed inside the detection table, and further comprises a mounting sleeve, a detection rod, a lifting driving mechanism, a pressure detection unit and a gas supply detection unit; the mounting sleeve is fixed on the top of the detection table and is used for positioning and supporting a product to be detected; a plurality of detection rods are arranged above the threading hole of the product to be detected, and an installation plate is fixedly sleeved with the outer sidewall of the detection rod; a sealing pressure sleeve sleeved with the outer side of the detection rod is fixed to the bottom of the installation plate. The present application can simulate the actual sealing state after high-frequency friction of the wire harness and the threading hole, realize synchronous detection of the correlation between friction loss and sealing reliability, improve the authenticity and accuracy of the detection data, effectively simplify the detection process and improve the detection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts testing technology, and in particular relates to a performance testing device for liquid silicone products used in new energy vehicles. Background Technology

[0002] Liquid silicone is a two-component injection-molded elastomer material with excellent resistance to high and low temperatures, high voltage insulation, waterproof sealing, and anti-aging properties. It is suitable for the harsh operating conditions of new energy vehicles and is widely used in core components such as power battery packs, electronic controls, and high-voltage wiring harnesses. It is a key component material for ensuring the sealing protection and electrical safety of the three-electric system.

[0003] To meet the assembly and long-term wear-resistant requirements of high-voltage wiring harnesses for new energy vehicles, the industry has adopted self-oiling modified liquid silicone material. This material can slowly and uniformly release trace amounts of silicone oil after molding, forming a stable lubricating film on the surface of the product. Low-friction assembly and long-term wear-resistant protection can be achieved without the need for additional silicone grease.

[0004] Reference Figure 1 , Figure 1 The image shows a four-hole wiring harness through-wall seal specifically designed for the three-electric system of new energy vehicles. The frictional resistance and sealing performance of the four-hole wiring harness through-wall seal are two core key indicators that determine the product assembly yield and the reliability of the entire vehicle. These two performances are interrelated and jointly affect the service condition of the component. The frictional resistance directly determines the smoothness of the high-voltage wiring harness installation and the wear caused by the relative displacement between the wiring harness and the seal during subsequent vehicle operation. The sealing performance is the core foundation for ensuring the waterproof, dustproof, and insulation protection of the three-electric system. Sealing failure will cause electrical safety hazards to the entire vehicle. Currently, the industry uses a separate testing method for the friction resistance and sealing performance of such products. The two performance tests are completed separately through different equipment and processes. However, this testing mode is cumbersome and requires transportation in between. This not only significantly reduces the overall testing efficiency and increases the cost of batch quality inspection, but also fails to simulate the correlation between friction state and sealing performance under real working conditions, making it difficult to accurately determine the overall reliability of the product in actual assembly and long-term use. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a performance testing device for liquid silicone products used in new energy vehicles that integrates sealing and friction resistance testing, improves testing efficiency, simplifies testing procedures, and makes test results more consistent with reality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a performance testing device for liquid silicone products used in new energy vehicles, comprising a testing platform and an industrial control cabinet installed inside the testing platform, and further comprising: a mounting mold, a testing rod, a lifting drive mechanism, a pressure testing unit and a gas supply testing unit; The mounting sleeve is fixed to the top of the testing table and is used to position and support the product to be tested; The test rods are provided in multiple parts and are positioned above the wire hole of the product to be tested. An installation plate is fixedly sleeved on the outer side wall of the test rod. A sealing sleeve sleeved on the outside of the test rod is fixedly attached to the bottom of the installation plate. The lifting drive mechanism is fixed to the top of the testing platform, and the pressure detection unit is installed between the mounting plate and the lifting drive mechanism. The gas supply detection unit is installed on the moving end of the lifting drive mechanism and is connected to the inside of the sealing sleeve.

[0007] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the lifting drive mechanism includes a support frame, a synchronous hydraulic cylinder, and a lifting plate; the support frame is fixed to the top of the testing platform; the synchronous hydraulic cylinder is fixedly inserted through the top of the support frame and is electrically connected to the industrial control cabinet; the lifting plate is fixed to the movable end of the synchronous hydraulic cylinder.

[0008] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the pressure testing unit includes a mounting frame, a pressure sensor, a slide rod, and a support spring; the mounting frame is fixed to the top of the mounting plate; the pressure sensor is disposed above the mounting frame and fixed to the bottom of the lifting plate, and the pressure sensor is electrically connected to the industrial control cabinet; the slide rod is fixed to the top of the mounting frame and slides through the lifting plate; the support spring is fixed between the mounting frame and the lifting plate.

[0009] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the gas supply testing unit includes a sealing cover, a gas supply hose, a pressure sensor, and a gas pressurization assembly. The sealing cover is fixed to the bottom of the lifting plate. Multiple gas supply hoses are provided and are fixedly connected to the sealing cover. The gas supply hoses are fixedly passed through the corresponding mounting plates and are connected to the interior of the sealing sleeve. The pressure sensor is inserted through the upper surface of the mounting plate and is connected to the interior of the sealing sleeve. The pressure sensor is electrically connected to the industrial control cabinet. The gas pressurization assembly is installed on the top of the lifting plate and is connected to the interior of the sealing cover.

[0010] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the gas pressurization assembly includes a cylinder, a pressurizing piston, and a pressurizing hydraulic cylinder; the cylinder is fixedly inserted into the top of the lifting plate and communicates with the interior of the sealing cover; the pressurizing piston is slidably disposed inside the cylinder; the pressurizing hydraulic cylinder is inserted through the top of the cylinder, and the pressurizing piston is fixed to the movable end of the pressurizing hydraulic cylinder; the pressurizing hydraulic cylinder is electrically connected to the industrial control cabinet.

[0011] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the inner side of the mounting mold is provided with multiple liquid storage containers, and the top of the liquid storage containers is provided with an insertion hole that matches the test rod. The liquid storage containers store cleaning agent inside; an adsorption component is installed on the top of the liquid storage containers.

[0012] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, the adsorption assembly includes a fixing plate, an electric heating ring, and an annular flexible moisture-absorbing component; the fixing plate is fixed to the top of the liquid storage container; the surface of the fixing plate has multiple mounting holes that match the electric heating ring, and the electric heating ring is fixed inside the mounting holes, and the electric heating ring is electrically connected to the industrial control cabinet; the annular flexible moisture-absorbing component is fixed to the inner side of the electric heating ring, and the inner diameter of the annular flexible moisture-absorbing component is smaller than the diameter of the test rod.

[0013] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, a heating hole is provided at the top of the testing rod, and an electric heating rod is fixedly inserted into the top of the testing rod, with the heating end of the electric heating rod located inside the heating hole.

[0014] In the aforementioned performance testing device for liquid silicone products used in new energy vehicles, a ranging probe is inserted through the top of the support frame, and the ranging probe is electrically connected to the industrial control cabinet; a reflective column coaxial with the ranging probe is fixed on the top of the lifting plate.

[0015] Compared with existing technologies, the present invention has the following advantages: 1. This invention, through the setting of a testing platform, industrial control cabinet and installation mold, can be used to position and install the four-hole wire harness through-wall seal to be tested. With the setting of a testing rod, lifting drive mechanism and pressure testing unit, it can use the testing rod to repeatedly pass through the wire hole of the four-hole wire harness through-wall seal to measure the frictional resistance. It can directly test the frictional resistance on the finished product, which improves the problem of the traditional method of using sliced ​​sample testing, which leads to large deviation between the data and the actual working conditions of the finished product and cannot truly reflect the wire friction performance of the product. The test results are more in line with reality.

[0016] 2. This invention, through the setting of an air supply detection unit, mounting plate, and sealing sleeve, can seal the wire hole with the sealing sleeve after the detection rod is inserted into place, and use the air supply detection unit to detect the sealing performance between the detection rod and the wire hole after each insertion. Thus, it can simultaneously complete the integrated detection of the sealing performance of the finished product while detecting frictional resistance. This not only simplifies the detection process and improves the efficiency of batch testing, but also simulates the actual sealing state after high-frequency friction between the wire harness and the wire hole, realizing the synchronous detection of the correlation between friction loss and sealing reliability, which helps to improve the authenticity and accuracy of the test data.

[0017] 3. This invention, through the provision of a liquid storage container, an insertion hole, and a cleaning agent, can assist in cleaning the silicone oil on the surface of the test rod after each insertion. By promptly cleaning the silicone oil seeping from the liquid silicone product, and in conjunction with real-time detection of frictional resistance, it can help determine the self-oil seepage rate of the liquid silicone product, thereby assisting in judging the self-oil seepage performance of the liquid silicone product. Secondly, with the provision of an adsorption component, it can work with the cleaning agent to clean the silicone oil on the surface of the test rod, and can also adsorb the cleaning agent adhering to the surface of the test rod when the test rod moves back, minimizing the impact of the cleaning agent on the oil seepage of the liquid silicone. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the product to be tested provided by the present invention; Figure 2 This is a three-dimensional structural schematic diagram of a liquid silicone product performance testing device for new energy vehicles provided by the present invention; Figure 3 This is a schematic diagram of the back structure of the testing station provided by the present invention; Figure 4 This is a schematic diagram of the structure of the test product after installation, provided by the present invention; Figure 5 This is a schematic diagram of the pressure detection unit provided by the present invention; Figure 6 This is a schematic diagram of the gas pressurization assembly provided by the present invention; Figure 7 This is a schematic diagram of the internal structure of the mounting mold provided by the present invention; Figure 8 This is a schematic diagram of the internal structure of the detection rod provided by the present invention; Figure 9 This invention provides Figure 2 Enlarged view of the structure of part A in the middle.

[0019] In the diagram: 1. Testing platform; 2. Control cabinet; 3. Mounting mold sleeve; 4. Testing rod; 5. Lifting drive mechanism; 51. Support frame; 52. Synchronous hydraulic cylinder; 53. Lifting plate; 6. Pressure detection unit; 61. Mounting bracket; 62. Pressure sensor; 63. Slide rod; 64. Support spring; 7. Gas supply detection unit; 71. Sealing cover; 72. Gas supply hose; 73. Gas pressure sensor; 8. Product to be tested; 9. Mounting plate; 10. Sealing sleeve; 11. Gas pressurization assembly; 111. Cylinder; 112. Pressurizing piston; 113. Pressurizing hydraulic cylinder; 12. Liquid storage container; 13. Insertion hole; 14. Adsorption assembly; 141. Fixing plate; 142. Heating ring; 143. Annular flexible moisture-absorbing element; 144. Mounting hole; 15. Heating hole; 16. Heating rod; 17. Distance measuring probe; 18. Reflector column. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figures 1-4 As shown, a performance testing device for liquid silicone products used in new energy vehicles includes a testing platform 1 and an industrial control cabinet 2 installed inside the testing platform 1. The device also includes: a mounting mold 3, a testing rod 4, a lifting drive mechanism 5, a pressure testing unit 6, and an air supply testing unit 7. The mounting mold 3 is fixed to the top of the testing platform 1 and is used to position and support the product 8 to be tested. Multiple testing rods 4 are provided and are positioned above the wire hole of the product 8 to be tested. A mounting plate 9 is fixedly sleeved on the outer wall of the testing rod 4. A sealing sleeve 10 is fixed to the bottom of the mounting plate 9 and sleeved on the outside of the testing rod 4. The lifting drive mechanism 5 is fixed to the top of the testing platform 1, and the pressure testing unit 6 is installed between the mounting plate 9 and the lifting drive mechanism 5. The air supply testing unit 7 is installed at the moving end of the lifting drive mechanism 5 and is connected to the inside of the sealing sleeve 10. The testing rod 4 is made of high-strength wear-resistant hard alloy material with a smooth polished surface. Its diameter is 0.5mm ± 0.1mm larger than the natural diameter of the wire hole of the product 8 to be tested. A sealing gasket is required at the bottom of the sealing sleeve 10.

[0022] In actual testing, in this embodiment, the lifting drive mechanism 5 can drive the detection rod 4 to move downward, so that the detection rod 4 passes through the thread hole of the product to be tested 8. When the detection rod 4 moves downward, it will generate friction with the thread hole of the product to be tested 8. At this time, the pressure applied by the detection rod 4 to the detection end of the pressure detection unit 6 is monitored by the pressure detection unit 6, and the frictional resistance of the detection rod 4 when it moves downward can be measured. When the test rod 4 moves down 22cm, the bottom of the sealing sleeve 10 applies a pressing pressure to the test product 8. At this time, the contact surface between the sealing sleeve 10 and the test product 8 remains sealed. Then, air is supplied to the sealing sleeve 10 and the wire hole of the test product 8 through the air supply detection unit 7, so that the air pressure inside the sealing sleeve 10 increases. If the seal between the wire hole and the test rod 4 is not good, the gas will leak out and the air pressure inside the sealing sleeve 10 will drop. It can be determined that the sealing effect of the wire hole of the test product 8 is not good. Thus, when the test rod 4 repeatedly punctures the wire hole, the friction resistance and sealing performance of the wire hole of the test product 8 can be detected. This not only simplifies the detection process and improves the efficiency of batch detection, but also the continuous insertion of the test rod 4 can simulate the actual sealing state between the cable and the wire hole after high-frequency friction, effectively improving the accuracy of sealing performance detection.

[0023] like Figure 3 and Figure 4As shown, in this embodiment, the lifting drive mechanism 5 includes a support frame 51, a synchronous hydraulic cylinder 52, and a lifting plate 53; the support frame 51 is fixed to the top of the testing table 1; the synchronous hydraulic cylinder 52 is fixedly inserted through the top of the support frame 51 and is electrically connected to the industrial control cabinet 2; the lifting plate 53 is fixed to the movable end of the synchronous hydraulic cylinder 52, and the synchronous hydraulic cylinder 52 drives the lifting plate 53 to move at a speed of 20mm / s to 50mm / s, which can be set through the industrial control cabinet 2 according to the testing requirements.

[0024] In actual testing, this embodiment uses a synchronous hydraulic cylinder 52 to drive the lifting plate 53 to move. The lifting plate 53 can drive the pressure detection unit 6, the air supply detection unit 7, the detection rod 4 and other components to move down, so that the detection rod 4 can be repeatedly inserted and removed at the wire hole of the product under test 8, thereby simulating the high-frequency friction between the cable and the wire hole of the product under test 8. In this way, the changes in frictional resistance and sealing performance of the product under test 8 can be continuously detected under high-frequency puncture friction.

[0025] like Figure 5 As shown, further, in this embodiment, the pressure detection unit 6 includes a mounting bracket 61, a pressure sensor 62, a sliding rod 63, and a support spring 64; the mounting bracket 61 is fixed to the top of the mounting plate 9; the pressure sensor 62 is disposed above the mounting bracket 61 and fixed to the bottom of the lifting plate 53, and the pressure sensor 62 is electrically connected to the industrial control cabinet 2; the sliding rod 63 is fixed to the top of the mounting bracket 61, and the sliding rod 63 slides through the lifting plate 53; the support spring 64 is fixed between the mounting bracket 61 and the lifting plate 53, and the pressure sensor 62 will... The frictional resistance experienced by the test rod 4 during its downward movement is converted into a pressure electrical signal and fed back to the industrial control cabinet 2. The industrial control cabinet 2 calculates the average frictional resistance experienced by the test rod 4 during a single downward movement. If the average frictional resistance during a single movement is greater than 12N, it indicates that the amount of silicone oil precipitated inside the product under test 8 is insufficient, the lubricating film is not replenished in time, and the lubrication effect of the product under test 8 is unqualified. At the same time, the industrial control cabinet 2 generates a line graph of the average frictional resistance during a single downward movement. The change in frictional resistance experienced by the test rod 4 with the number of downward movements can be viewed on the display end of the industrial control cabinet 2.

[0026] In actual testing, this embodiment uses the slide bar 63 and the support spring 64 to support the mounting frame 61 and the mounting plate 9 and the detection rod 4 below the mounting frame 61. When the detection rod 4 moves down to pierce the thread hole of the product to be tested 8, the movement of the detection rod 4 is hindered due to the friction of the thread hole wall. Under the action of this resistance, the detection end of the pressure sensor 62 is squeezed. Therefore, the frictional resistance experienced by the detection rod 4 during the downward movement can be measured by the pressure sensor 62.

[0027] like Figure 5As shown, further, in this embodiment, the gas supply detection unit 7 includes a sealing cover 71, a gas supply hose 72, a pressure sensor 73, and a gas pressurization assembly 11; the sealing cover 71 is fixed to the bottom of the lifting plate 53; multiple gas supply hoses 72 are provided and are fixedly connected to the sealing cover 71, the gas supply hoses 72 are fixedly passed through the corresponding mounting plates 9, and are connected to the inside of the sealing sleeve 10; the pressure sensor 73 is inserted through and connected to the upper surface of the mounting plate 9, and is connected to the inside of the sealing sleeve 10, and the pressure sensor 73 is electrically connected to the industrial control cabinet 2; the gas pressurization assembly 11 is installed on the top of the lifting plate 53 and is connected to the inside of the sealing cover 71. After the detection rod 4 moves down to the position, the detection rod 4 moves back after an interval of 10 seconds, and the pressure is monitored for 10 seconds by the pressure sensor 73 to determine the sealing performance between the wire hole of the product to be tested 8 and the detection rod 4.

[0028] In actual testing, after the sealing sleeve 10 is pressed against the test product 8, the gas pressurization component 11 can work with the sealing cover 71 and the air supply hose 72 to increase the air pressure inside the sealing sleeve 10. Since the sealing sleeve 10 is connected to the wire hole of the test product 8, the air pressure at the wire hole increases synchronously. By monitoring whether the air pressure inside the wire hole decreases through the air pressure sensor 73, the sealing performance between the wire hole of the test product 8 and the test rod 4 can be determined.

[0029] like Figure 5 and Figure 6 As shown, further, in this embodiment, the gas pressurization assembly 11 includes a cylinder 111, a pressurizing piston 112, and a pressurizing hydraulic cylinder 113; the cylinder 111 is fixedly inserted into the top of the lifting plate 53 and communicates with the interior of the sealing cover 71; the pressurizing piston 112 is slidably disposed inside the cylinder 111; the pressurizing hydraulic cylinder 113 is inserted through the top of the cylinder 111, and the pressurizing piston 112 is fixed to the movable end of the pressurizing hydraulic cylinder 113; the pressurizing hydraulic cylinder 113 is electrically connected to the industrial control cabinet 2; an exhaust hole is provided at the top of the cylinder 111 to prevent the pressurizing piston 112 from being subjected to excessive air resistance when it moves back; the pressurizing hydraulic cylinder 113 and the synchronous hydraulic cylinder 52 share a hydraulic station; the effective stroke of the pressurizing hydraulic cylinder 113 driving the pressurizing piston 112 is 10cm; and the inner diameter of the cylinder 111 is 50mm.

[0030] In actual testing, this embodiment uses a pressurizing hydraulic cylinder 113 to drive the pressurizing piston 112 downward, thereby compressing the air inside the cylinder 111 below the pressurizing piston 112 and inside the sealing cover 71. In conjunction with the air supply hose 72, the air pressure inside the sealing sleeve 10 increases synchronously, thus facilitating rapid pressurization of the sealing sleeve 10 to quickly detect the sealing status between the test product 8 and the test rod 4. Compared with traditional pressurizing air pumps, this method has a faster pressurization speed and a simpler structure.

[0031] like Figure 7 As shown, further, in this embodiment, the inner side of the mounting sleeve 3 is provided with multiple liquid storage containers 12, and the top of the liquid storage container 12 is provided with an insertion hole 13 that matches the detection rod 4. The liquid storage container 12 stores cleaning agent inside; an adsorption component 14 is installed on the top of the liquid storage container 12, and the cleaning agent is an environmentally friendly neutral water-based silicone oil cleaning agent. The liquid storage container 12 and the detection platform 1 are detachably connected by bolts and other components, which facilitates the replacement of the internal cleaning agent. Secondly, a drain pipe can be added to the bottom of the liquid storage container 12, and a replenishment pipe can be added to the side wall. Valves are installed in both pipes, which can automatically replace the cleaning agent periodically. The liquid storage container 12 is 8cm high and has an inner diameter of 5cm.

[0032] In actual testing, this embodiment uses a liquid storage container 12 to store cleaning agent. After the detection rod 4 is lowered into position, it extends 7cm into the liquid storage container 12. The end of the detection rod 4 is wrapped with cleaning agent, which quickly cleans the trace amount of silicone oil and fine impurities on the surface of the detection rod 4, preventing the long-term accumulation of silicone oil and film from affecting the accuracy of subsequent friction resistance testing. Specifically, after the detection rod 4 is lowered by 15cm (the detection rod 4 is lowered by 8cm from the initial position to contact the test product 8, and then lowered by another 7cm to begin extending into the liquid storage container 12), the industrial control cabinet 2 will control the pressure sensor 62 to stop pressure monitoring, so as to prevent the uncleaned part of the detection rod 4 from affecting the accuracy of subsequent pressure testing. Meanwhile, since the attached silicone oil on the surface of the test rod 4 is thoroughly cleaned after each puncture, the problem of the test rod 4 sticking back to the wire hole of the test product 8 with oil can be completely eliminated, eliminating the interference of external residual silicone oil on the test results. Each reciprocating friction resistance test relies on the silicone oil that is released from the test product 8 in real time, restoring the dynamic oil seepage and friction matching characteristics of the test product 8. Therefore, if the oil seepage performance of the test product 8 is excellent and the silicone oil release rate is stable, a uniform lubricating oil film can be continuously formed on the inner wall of the wire hole, and the friction resistance fluctuation of the test rod 4 during reciprocating insertion is small and the overall value is stable. If the oil seepage of the test product 8 is insufficient and the lubricating oil film on the inner wall of the wire hole cannot be replenished in time after consumption, the friction resistance when the test rod 4 moves down to insert will increase. By observing the pressure fluctuation, the self-permeability rate of silicone oil in the test product 8 can be judged.

[0033] like Figure 7As shown, in this embodiment, the adsorption assembly 14 includes a fixing plate 141, an electric heating ring 142, and an annular flexible moisture-absorbing element 143. The fixing plate 141 is fixed to the top of the liquid storage container 12. The surface of the fixing plate 141 is provided with a plurality of mounting holes 144 that match the electric heating ring 142, and the electric heating ring 142 is fixed inside the mounting holes 144. The electric heating ring 142 is electrically connected to the industrial control cabinet 2. The annular flexible moisture-absorbing element 143 is fixed to the inner side of the electric heating ring 142. The inner diameter of the annular flexible moisture-absorbing element 143 is smaller than the diameter of the detection rod 4. The controllable heating temperature of the electric heating ring 142 is set to 45℃±1℃. The annular flexible moisture-absorbing element 143 is made of high-density heat-resistant polyester sponge material, which has excellent adsorption, flexibility, and high temperature resistance. A temperature probe (not shown in the figure) is integrated at the mounting hole 144. The industrial control cabinet 2 controls the operation of the electric heating ring 142 according to the electrical signal fed back by the temperature probe.

[0034] In actual testing, this embodiment uses the annular flexible moisture-absorbing element 143 to pre-contact the downward-moving test rod 4, which allows for the initial adsorption of silicone oil on the surface of the test rod 4. Subsequently, the test rod 4 comes into contact with the cleaning agent, and the residual silicone oil on the surface of the test rod 4 is repeatedly cleaned using the cleaning agent. When the test rod 4 moves back, the cleaning agent on the surface of the test rod 4 is adsorbed by the annular flexible moisture-absorbing element 143. On the one hand, this prevents the cleaning agent on the surface of the test rod 4 from contacting the wire hole of the test product 8, which would affect the subsequent silicone oil seepage and friction detection. On the other hand, the cleaning agent can contact the silicone oil inside the annular flexible moisture-absorbing element 143, and with the heating effect of the heating ring 142, the silicone oil and cleaning agent mixture adsorbed inside the annular flexible moisture-absorbing element 143 can be heated, dried, and evaporated to remove the stains, avoiding long-term accumulation of stains that could cause blockage or failure of the moisture-absorbing element.

[0035] like Figure 8 As shown, in this embodiment, a heating hole 15 is provided on the top of the detection rod 4, and an electric heating rod 16 is fixedly inserted into the top of the detection rod 4. The heating end of the electric heating rod 16 is located inside the heating hole 15. The heating temperature of the electric heating rod 16 is 50℃±1℃. A temperature probe (not shown in the figure) is integrated inside the heating hole 15. The industrial control cabinet 2 controls the electric heating rod 16 to work according to the electrical signal fed back by the temperature probe.

[0036] In actual testing, this embodiment heats the test rod 4 with an electric heating rod 16. On the one hand, this can simulate the high-temperature environment generated when the wire harness is working. On the other hand, it can keep the temperature inside the wire hole and the sealing sleeve 10 stable, minimizing the impact of temperature fluctuations on the air pressure. At the same time, since the self-permeable oil properties of liquid silicone are greatly affected by temperature, controlling the temperature of the test rod 4 can effectively reduce the impact of temperature fluctuations on the self-permeable oil stability of the test product 8.

[0037] like Figure 1 and Figure 9 As shown, in this embodiment, a ranging probe 17 is inserted through the top of the support frame 51, and the ranging probe 17 is electrically connected to the industrial control cabinet 2; a reflective column 18 coaxial with the ranging probe 17 is fixed on the top of the lifting plate 53. The ranging probe 17 can determine the position of the reflective column 18 by emitting a light beam and calculating the time required to receive the light beam reflected back from the reflective column 18.

[0038] In actual testing, this embodiment can detect the position of the reflective column 18 in real time through the ranging probe 17. The reflective column 18 moves synchronously up and down with the lifting plate 53. Therefore, the position of the lifting plate 53 can be determined by the position of the reflective column 18, which makes it convenient for the industrial control cabinet 2 to control the synchronous hydraulic cylinder 52, pressure sensor 62 and pressurizing hydraulic cylinder 113 to perform work according to the program.

[0039] The operation process of this invention is as follows: the product to be tested 8 is placed on the mounting mold 3 (refer to...). Figure 4 Using the installation mold sleeve 3, the product to be tested 8 is accurately positioned and limited and fixed, ensuring that each wire hole of the product to be tested 8 is coaxially aligned with the corresponding detection rod 4 above. The moving speed of the lifting plate 53 driven by the synchronous hydraulic cylinder 52 is set through the industrial control cabinet 2, and the speed parameter is adjusted to the standard detection range of 20mm / s to 50mm / s. At the same time, the number of reciprocating insertion and detection times of the equipment is set, and the detection work is started through the industrial control cabinet 2. The control cabinet 2 controls the extension of the synchronous hydraulic cylinder 52, driving the lifting plate 53 to move downward at a uniform speed. The lifting plate 53 synchronously drives the pressure detection unit 6, the air supply detection unit 7, the detection rod 4, and the sealing sleeve 10 to move downward as a whole. During the downward movement, the ranging probe 17 on the top of the support frame 51 emits a detection beam in real time. By receiving the beam signal reflected by the reflector column 18, the displacement position of the lifting plate 53 is monitored in real time and fed back to the control cabinet 2 in real time. During the downward movement of the lifting plate 53, the detection rod 4 is first aligned with the thread hole of the product to be tested 8 and inserted at a uniform speed. The outer wall of the detection rod 4 is fully in contact with the inner wall of the thread hole and rubs. At this time, the pressure sensor 62 collects the frictional resistance encountered by the detection rod 4 during the downward movement in real time, converts the mechanical resistance signal into an electrical signal and transmits it to the control cabinet 2. The control cabinet 2 records the pressure data in real time, calculates the average frictional resistance of the detection rod 4 during a single downward movement and automatically generates a line graph of frictional resistance change, and provides real-time feedback on the fluctuation of frictional values. When the total stroke of the test rod 4 reaches 15cm, the industrial control cabinet 2 automatically controls the pressure sensor 62 to stop the pressure monitoring work. At this time, the end of the test rod 4 extends 7cm into the liquid storage container 12. The cleaning agent inside the liquid storage container 12 is used to clean the friction working surface of the test rod 4. During the downward movement of the test rod 4, it will first pass through the annular flexible moisture-absorbing element 143 at the top of the liquid storage container 12. The annular flexible moisture-absorbing element 143 pre-absorbs the large pieces of silicone oil floating oil and fine impurities attached to the surface of the test rod 4. Then, the cleaning agent completes the deep cleaning. When the test rod 4 continues to move down to a total stroke of 22cm, the sealing sleeve 10 presses tightly against the surface of the product to be tested 8, so that the sealing sleeve 10 and the contact surface of the product to be tested 8 form a sealed cavity. At this time, the industrial control cabinet 2 controls the pressurizing hydraulic cylinder 113 to drive the pressurizing piston 112 to move down inside the cylinder 111. The pressurizing piston 112 compresses the air inside the cylinder 111 at a uniform speed. The compressed air is stably introduced into the sealing sleeve 10 through the sealing cover 71 and the air supply hose 72. After pressurization is completed, the air pressure sensor 73 is activated and the air pressure inside the sealing sleeve 10 is monitored for 10 seconds. The air pressure decay data is collected in real time. If the air pressure drop value is >0.1kPa, it indicates that the product under test 8 has a sealing failure. After the single-wheel friction test and air tightness test are completed, the industrial control cabinet 2 controls the synchronous hydraulic cylinder 52 to drive the lifting plate 53 and the test rod 4 to move back and reset as a whole. Then, the industrial control cabinet 2 controls each component to repeat the aforementioned actions until the set number of reciprocating puncture tests is reached.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A performance testing device for liquid silicone products used in new energy vehicles, comprising a testing platform (1) and an industrial control cabinet (2) installed inside the testing platform (1), characterized in that, Also includes: Install the mold sleeve (3), the detection rod (4), the lifting drive mechanism (5), the pressure detection unit (6), and the air supply detection unit (7); The mounting sleeve (3) is fixed on the top of the testing table (1) and is used to position and support the product to be tested (8). Multiple detection rods (4) are provided and are positioned above the wire hole of the product to be tested (8). An installation plate (9) is fixedly sleeved on the outer side wall of the detection rod (4). A sealing sleeve (10) sleeved on the outside of the detection rod (4) is fixedly attached to the bottom of the installation plate (9). The lifting drive mechanism (5) is fixed on the top of the testing table (1), and the pressure detection unit (6) is installed between the mounting plate (9) and the lifting drive mechanism (5). The pressure detection unit (6) calculates the frictional resistance experienced by the test rod (4) when it passes through the wire hole of the test product (8). The gas supply detection unit (7) is installed at the moving end of the lifting drive mechanism (5) and is connected to the inside of the sealing sleeve (10); The inner side of the mounting sleeve (3) is provided with multiple liquid storage containers (12), and the top of the liquid storage container (12) is provided with an insertion hole (13) that matches the detection rod (4). The liquid storage container (12) stores cleaning agent inside; an adsorption component (14) is installed on the top of the liquid storage container (12). The lifting drive mechanism (5) includes a support frame (51), a synchronous hydraulic cylinder (52), and a lifting plate (53); the support frame (51) is fixed to the top of the testing table (1); the synchronous hydraulic cylinder (52) is fixedly inserted through the top of the support frame (51), and the synchronous hydraulic cylinder (52) is electrically connected to the industrial control cabinet (2); the lifting plate (53) is fixed to the movable end of the synchronous hydraulic cylinder (52); The gas supply detection unit (7) includes a sealing cover (71), a gas supply hose (72), a pressure sensor (73), and a gas pressurization assembly (11); the sealing cover (71) is fixed to the bottom of the lifting plate (53); multiple gas supply hoses (72) are provided and are fixedly connected to the sealing cover (71), the gas supply hoses (72) are fixedly penetrated through the corresponding mounting plate (9) and are connected to the inside of the sealing sleeve (10); the pressure sensor (73) is inserted through the upper surface of the mounting plate (9) and is connected to the inside of the sealing sleeve (10), the pressure sensor (73) is electrically connected to the industrial control cabinet (2); the gas pressurization assembly (11) is installed on the top of the lifting plate (53) and is connected to the inside of the sealing cover (71); The adsorption assembly (14) includes a fixing plate (141), an electric heating ring (142), and an annular flexible moisture-absorbing element (143); the fixing plate (141) is fixed on the top of the liquid storage container (12); the surface of the fixing plate (141) is provided with a plurality of mounting holes (144) that match the electric heating ring (142), and the electric heating ring (142) is fixed inside the mounting holes (144), and the electric heating ring (142) is electrically connected to the industrial control cabinet (2); the annular flexible moisture-absorbing element (143) is fixed on the inner side of the electric heating ring (142), and the inner diameter of the annular flexible moisture-absorbing element (143) is smaller than the diameter of the detection rod (4).

2. The performance testing device for liquid silicone products used in new energy vehicles according to claim 1, characterized in that, The pressure detection unit (6) includes a mounting bracket (61), a pressure sensor (62), a slide rod (63), and a support spring (64); the mounting bracket (61) is fixed on the top of the mounting plate (9); the pressure sensor (62) is located above the mounting bracket (61) and fixed at the bottom of the lifting plate (53), and the pressure sensor (62) is electrically connected to the industrial control cabinet (2); the slide rod (63) is fixed on the top of the mounting bracket (61), and the slide rod (63) slides through the lifting plate (53); the support spring (64) is fixed between the mounting bracket (61) and the lifting plate (53).

3. The performance testing device for liquid silicone products used in new energy vehicles according to claim 1, characterized in that, The gas pressurization assembly (11) includes a cylinder (111), a pressurizing piston (112), and a pressurizing hydraulic cylinder (113). The cylinder (111) is fixedly inserted into the top of the lifting plate (53) and communicates with the interior of the sealing cover (71). The pressurizing piston (112) is slidably disposed inside the cylinder (111). The pressurizing hydraulic cylinder (113) is inserted through the top of the cylinder (111), and the pressurizing piston (112) is fixed at the movable end of the pressurizing hydraulic cylinder (113). The pressurizing hydraulic cylinder (113) is electrically connected to the industrial control cabinet (2).

4. The performance testing device for liquid silicone products used in new energy vehicles according to claim 1, characterized in that, The top of the detection rod (4) is provided with a heating hole (15), and an electric heating rod (16) is fixedly inserted into the top of the detection rod (4), and the heating end of the electric heating rod (16) is located inside the heating hole (15).

5. The performance testing device for liquid silicone products used in new energy vehicles according to claim 1, characterized in that, The top of the support frame (51) is connected to a distance measuring probe (17), and the distance measuring probe (17) is electrically connected to the industrial control cabinet (2); the top of the lifting plate (53) is fixed with a reflective column (18) coaxial with the distance measuring probe (17).

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