Device and method for testing performance of ventilation system of gearbox

Abstract

The invention provides a gearbox ventilation system performance test device and test method, and relates to the gearbox test field, and the scheme is that the gearbox ventilation system performance test device comprises a mounting seat and a controller; a driving motor is arranged on the mounting seat; an oil temperature sensor; an oil pressure sensor; an oil leakage detection assembly; a lubricating oil water content detection sensor; the spraying assembly is arranged on the front supporting frame, the spraying assembly comprises a spraying head, the spraying head can be arranged opposite to the ventilation plug of the gearbox to be tested and is used for spraying water to the ventilation plug to simulate the raining process, and the spraying assembly is electrically connected with the controller. The air pressure balance performance, the heat dissipation performance, the rainproof performance and the oil leakage performance of the ventilation system can be comprehensively tested.

Description

Technical Field

[0001] The present invention relates to the field of gearbox testing, and in particular to a gearbox ventilation system performance testing device and a testing method. Background Art

[0002] The gearbox ventilation system can keep the air pressure inside and outside the gearbox consistent, avoid negative or positive pressure, and has the function of balancing the internal and external air pressure and dissipating heat. The ventilation system generally includes components such as vent plugs, filters, and air ducts. In order to ensure that the ventilation system has a good ability to balance air pressure and dissipate heat, while also meeting the requirements of avoiding oil leakage and rain protection, the structure and installation position of vent plugs, air ducts and other components are often optimized after the gearbox structure changes.

[0003] In order to ensure a better balanced air pressure and rain protection capability, it is also necessary to verify and test the performance of the optimized and improved ventilation system. In the prior art, a Chinese invention patent with authorization announcement number CN114295366B discloses a system and test method for gearbox lubricating oil quantity and ventilation testing, which discloses that when performing a ventilation test, the control component controls the filling component to inject a third amount of lubricating oil into the gearbox assembly, starts the test bench to perform the test, and detects the oil temperature and oil leakage of the lubricating oil of the gearbox assembly through the measuring component.

[0004] The above test method can only detect whether there is oil leakage in the ventilation plug of the ventilation system and whether the layout position of the ventilation plug is reasonable, but it cannot verify the air pressure balance performance, heat dissipation performance and rain protection performance of the ventilation system, and the verification is not comprehensive. Summary of the invention

[0005] In order to solve the technical problem that it is difficult to comprehensively test the performance of the gearbox ventilation system in the above-mentioned prior art, the present invention provides a gearbox ventilation system performance testing device and testing method, which can comprehensively test the air pressure balance performance, heat dissipation performance, rain protection performance and oil leakage performance of the ventilation system.

[0006] In the first aspect, the present invention provides a gearbox ventilation system performance test device to solve the above technical problems, including a mounting seat and a controller; the mounting seat is used to support the gearbox to be tested, and a drive motor is arranged on the mounting seat, and the drive motor is used to provide power to the gearbox to be tested, and the drive motor is electrically connected to the controller; an oil temperature sensor, the oil temperature sensor can be extended into the gearbox to be tested, and is used to test the oil temperature of the gearbox to be tested, and the oil temperature sensor is electrically connected to the controller; an oil pressure sensor, the oil pressure sensor can be extended into the gearbox to be tested, and is used to test The oil pressure of the gearbox to be tested, the oil pressure sensor is electrically connected to the control; an oil leakage detection component, the oil leakage detection component is used to detect whether there is an oil leakage; a lubricating oil water content detection sensor, the lubricating oil water content detection sensor is used to detect the water content of the lubricating oil of the gearbox to be tested, and the lubricating oil water content detection sensor is electrically connected to the controller; a spray component, the spray component is arranged on the front support frame, the spray component includes a spray head, the spray head can be arranged opposite to the vent plug of the gearbox to be tested, and is used to spray water to the vent plug to simulate a raining process, and the spray component is electrically connected to the controller.

[0007] The present invention can comprehensively test the air pressure balance performance, heat dissipation performance, rainproof performance and oil leakage performance of the ventilation system by arranging an oil pressure sensor, an oil temperature sensor, a lubricating oil water content detection sensor and an oil leakage detection component, and conduct a comprehensive inspection of the gearbox ventilation system, which is convenient for designers to make accurate judgments.

[0008] Furthermore, the mounting seat includes a support frame 1 and a support frame 2 that are relatively arranged, a mounting plate is arranged between the support frame 1 and the support frame 2, a hinge seat is arranged at the supporting end of the mounting plate, the hinge seat is hinged to the support frame 1, the moving end of the mounting plate can move up and down along the support frame 2, the driving motor is arranged on the mounting plate, and a fixing component is arranged at the front end of the mounting plate, and the fixing component is used for detachably mounting the gearbox to be tested.

[0009] The present invention enables the mounting plate to be installed in a tilted form at one end, so that the gearbox to be tested can simulate the situation of going uphill or downhill with the whole vehicle, thereby improving the accuracy and comprehensiveness of the simulation of the gearbox working condition by the device, and more accurately and comprehensively verifying whether the test ventilation system meets the use requirements.

[0010] Furthermore, a wire seat is provided at the moving end of the mounting plate, guide posts are provided at both ends of the wire seat, the guide posts are provided in corresponding guide grooves of the second support frame, the guide posts can move up and down along the guide grooves, the wire seat is provided on a lead screw, the lead screw passes through the mounting plate and a lifting motor is provided at the lower end.

[0011] The present invention drives the adjusting end of the mounting plate to lift up in the form of a lifting motor and a lead screw, which can improve control accuracy and make the simulation closer to the actual working condition of the gearbox.

[0012] Furthermore, the fixing assembly adopts a mounting flange, the mounting flange is coaxially arranged with the motor shaft of the driving motor, at least two circles of connecting holes are arranged on the end face of the mounting flange, and the outer circumferential surface of the mounting flange is connected to the support frame.

[0013] The present invention provides a plurality of circles of connecting holes on the mounting flange, thereby being able to meet the needs of installation and testing of gearboxes to be tested of various sizes, thereby improving the applicability and flexibility of use of the device.

[0014] Furthermore, the oil leakage detection component includes an industrial camera and qualitative filter paper, the qualitative filter paper is in a ring structure, the qualitative filter paper is put on the vent plug and fits the surface of the gearbox to be tested, the industrial camera can be arranged relative to the qualitative filter paper, and the industrial camera is electrically connected to the control module.

[0015] The present invention verifies whether there is oil leakage by using qualitative filter paper, and an industrial camera is provided to respond the oil leakage to a controller, thereby replacing naked eye observation by personnel, and the analysis result is more accurate.

[0016] Furthermore, the industrial camera is connected to the mounting base via a gooseneck tube.

[0017] The present invention can adjust the position of the industrial camera through the gooseneck tube and is suitable for different ventilation systems.

[0018] Furthermore, the spray assembly also includes a water tank and a water pump, the water pump is electrically connected to the controller, the water pump is connected to the nozzle through a universal bamboo tube, and a flow rate sensor is provided at the water outlet end of the water pump, and the flow rate sensor is electrically connected to the controller.

[0019] The present invention connects the nozzles through the universal bamboo tube, and can adjust the position of the nozzles according to the position of the vent plug, thereby improving the accuracy of rainproof performance detection.

[0020] Furthermore, the controller includes a control cabinet, which is arranged on one side of the mounting base. A display and a voice prompter are provided on the control cabinet. A control module is provided in the control cabinet. The control module includes a computing unit, an image analysis unit and a storage unit. The control module also includes a USB interface.

[0021] In a second aspect, the present invention further provides a gearbox ventilation system performance test method, using the gearbox ventilation system performance test device described above, comprising the following steps:

[0022] S01: Install the gearbox to be tested;

[0023] S02: With the help of the monitor, adjust the position of the industrial camera to ensure that it is opposite to the vent plug;

[0024] S03: Adjust the position of the nozzle to ensure that it is opposite to the vent plug;

[0025] S04: Conduct the experiment;

[0026] S05: After the test, analyze the oil temperature, oil pressure, oil leakage and water content of the lubricating oil.

[0027] Furthermore, before S05, the oil pressure range and oil temperature range used by the qualified ventilation system are divided into levels, and in combination with the use environment of the gearbox to be tested, evaluation weights of oil temperature, oil pressure, rain protection and oil leakage are allocated and stored in the controller. According to the working condition of the whole vehicle in which the gearbox is located, at least two working modes of the gearbox to be tested are set and stored in the controller, and the working mode parameters include gearbox gear, drive motor speed, and angle variation range of the gearbox to be tested; in S05, the controller calculates the performance level of the ventilation system of the gearbox to be tested according to the allocated weights.

[0028] The present invention divides the index levels and weights so that the controller can quantitatively obtain the ventilation system performance status, so that designers can determine whether further optimization is needed according to the working conditions. At the same time, the working mode of the gearbox is set in combination with the vehicle working conditions, so that the various parameters set in the test have a synergistic effect, making the gearbox working condition simulation closer to the actual working condition, increasing the test dimension of the ventilation system performance, avoiding excessive optimization design, and shortening the design cycle and cost.

[0029] It can be seen from the above technical solutions that the present invention has the following advantages:

[0030] The present invention provides a gearbox ventilation system performance test device and a test method. By arranging an oil pressure sensor, an oil temperature sensor, a lubricating oil water content detection sensor and an oil leakage detection component, the air pressure balance performance, heat dissipation performance, rainproof performance and oil leakage performance of the ventilation system can be fully tested, and the gearbox ventilation system can be fully tested, which is convenient for designers to make accurate judgments; by installing the mounting plate in a tilted form at one end, the gearbox to be tested can simulate the situation of going uphill and downhill with the whole vehicle, thereby improving the accuracy and comprehensiveness of the simulation of the gearbox working condition by the device, and more accurately and comprehensively verifying whether the test ventilation system meets the use requirements; by driving the adjustment end of the mounting plate to lift up in the form of a lifting motor and a lead screw, the control accuracy can be improved, making the simulation closer to the actual working condition of the gearbox; by arranging multiple circles of connecting holes on the mounting flange, it can meet the installation and testing of gearboxes of various sizes to be tested. , improve the applicability and flexibility of the device; by using the lubricating oil water content detection sensor, the rain protection condition of the vent plug can be accurately and quantitatively reflected; by using qualitative filter paper to verify whether there is oil leakage, setting up an industrial camera can reflect the oil leakage condition to the controller, instead of personnel's naked eye observation, and the analysis result is more accurate; by connecting the nozzle through a universal bamboo tube, the position of the nozzle can be adjusted according to the position of the vent plug, and the accuracy of rain protection performance detection is improved; by dividing the index levels and weights, the controller can quantitatively obtain the performance of the ventilation system, so that designers can determine whether further optimization is needed according to the working conditions. At the same time, the working mode of the gearbox is set in combination with the working conditions of the whole vehicle, so that the various parameters set in the test have a synergistic effect, making the gearbox working condition simulation closer to the real working condition, increasing the test dimension of the ventilation system performance, avoiding excessive optimization design, and shortening the design cycle and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0033] In the figure, 1. nozzle; 2. vent plug; 3. oil pressure sensor; 4. oil temperature sensor; 5. mounting flange; 6. pin shaft; 7. drive motor; 8. support plate; 9. controller; 10. lead screw; 11. screw seat; 12. mounting plate; 13. gearbox to be tested; 14. support frame 2; 15. support frame 1. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent. Specific implementation method 1

[0036] like Figure 1 As shown, this specific embodiment provides a gearbox ventilation system performance test device, including a mounting seat, a controller 9, an oil temperature sensor 4, an oil pressure sensor 3, an oil leakage detection component, a lubricating oil water content detection sensor and a spray component; the mounting seat is used to carry the gearbox 13 to be tested, and a drive motor 7 is arranged on the mounting seat. The drive motor 7 is used to provide power to the gearbox 13 to be tested, and the drive motor 7 is electrically connected to the controller 9; the oil temperature sensor 4 can be extended into the gearbox 13 to be tested, and is used to test the oil temperature of the gearbox 13 to be tested, and the oil temperature sensor 4 is electrically connected to the controller 9; the oil pressure sensor 3 can It can be installed at the corresponding position of the gearbox to be tested 13, extend into the gearbox to be tested 13, and be used to test the oil pressure of the gearbox to be tested 13, and the oil pressure sensor 3 is electrically connected to the control; the oil leakage detection component is used to detect whether there is oil leakage; the lubricating oil water content detection sensor is used to detect the water content of the lubricating oil of the gearbox to be tested 13, and the lubricating oil water content detection sensor is electrically connected to the controller 9; the spray component is arranged on the front support frame, and the spray component includes a spray head 1, and the spray head 1 can be arranged opposite to the vent plug 2 of the gearbox to be tested 13, and is used to spray water to the vent plug 2 to simulate the rain process, and the spray component is electrically connected to the controller 9.

[0037] This specific embodiment can comprehensively test the air pressure balance performance, heat dissipation performance, rainproof performance and oil leakage performance of the ventilation system by setting up an oil pressure sensor 3, an oil temperature sensor 4, a lubricating oil water content detection sensor and an oil leakage detection component, and conduct a comprehensive inspection of the gearbox ventilation system, which is convenient for designers to make accurate judgments.

[0038] like Figure 1As shown, in the prior art, the working condition of the whole vehicle is relatively complex, including flat highways and undulating mountain roads. The gearbox also has different working conditions under different whole vehicle working conditions, and the speed, torque and tilt angle are all different. The requirements for various aspects of the ventilation system under different working conditions are different. In order to fully simulate the working condition of the gearbox and conduct a comprehensive test on the ventilation system, in this specific embodiment, the mounting seat includes a support frame 15 and a support frame 2 14 that are relatively arranged, and a mounting plate 12 is arranged between the support frame 15 and the support frame 2 14. A hinge seat is arranged at the supporting end of the mounting plate 12, and the hinge seat is hinged to the support frame 15 through the pins 6 on both sides thereof. The moving end of the mounting plate 12 can move up and down along the support frame 2 14, and a driving motor 7 is arranged on the mounting plate 12 through the support plate 8. A fixing component is arranged at the front end of the mounting plate 12, and the fixing component is used to detachably install the gearbox 1 to be tested 3; Preferably, a wire seat 11 is provided at the moving end of the mounting plate 12, and guide pillars are provided at both ends of the wire seat 11. The guide pillars are arranged in the corresponding guide grooves of the support frame 14, and the guide pillars can move up and down along the guide grooves. The wire seat 11 is arranged on the screw 10, and the screw 10 passes through the mounting plate 12 and is provided with a lifting motor at the lower end. The adjustment end of the mounting plate 12 is driven to lift by the lifting motor and the screw 10, which can improve the control accuracy and make the simulation closer to the actual working condition of the gearbox; the fixing component adopts a mounting flange 5, and the mounting flange 5 is coaxially arranged with the motor shaft of the driving motor 7. At least two circles of connecting holes are arranged on the end face of the mounting flange 5. The outer circumferential surface of the mounting flange 5 is connected to the support frame 15 by bolts. By arranging multiple circles of connecting holes on the mounting flange 5, it can meet the installation and testing of gearboxes 13 to be tested of various sizes, thereby improving the applicability and flexibility of use of the device.

[0039] In this specific embodiment, the oil leakage detection component includes an industrial camera and qualitative filter paper. The qualitative filter paper is in an annular structure. The qualitative filter paper is put on the ventilation plug 2 and fits with the surface of the gearbox to be tested. The industrial camera can be arranged relative to the qualitative filter paper. The industrial camera is electrically connected to the control module. The qualitative filter paper will produce a yellow annular pattern when it encounters lubricating oil. The oil leakage situation can be judged by measuring the radial width of the annular oil spot on the qualitative filter paper. By using the qualitative filter paper, the oil leakage situation can be intuitively reflected; the industrial camera is connected to the mounting seat through a gooseneck tube, and the position of the industrial camera can be adjusted to cooperate with different ventilation systems; the industrial camera is set to be able to report the oil leakage situation to the controller, and determine the radial width of the annular oil spot through the control module, instead of naked eye observation by personnel, and the analysis result is more accurate.

[0040] In this specific embodiment, the spray assembly also includes a water tank and a water pump, the water pump is electrically connected to the controller 9, the water pump is connected to the nozzle 1 through a universal bamboo tube, a flow rate sensor is provided at the water outlet end of the water pump, and the flow rate sensor is electrically connected to the controller 9; the nozzle 1 is connected through the universal bamboo tube, and the position of the nozzle 1 can be adjusted according to the position of the vent plug 2, thereby improving the accuracy of rain protection performance detection.

[0041] In this specific embodiment, the controller 9 includes a control cabinet, which is arranged on one side of the mounting base. A display and a voice prompter are provided on the control cabinet. The display can detect the conditions of various detected indicators. The display is a touch screen, which is convenient for command input and selection; a control module is provided in the control cabinet, and the control module includes a calculation unit, an image analysis unit and a storage unit. The control module also includes a USB interface. The calculation unit is used to calculate the performance level and quantitatively respond to the performance of the ventilation system. The image analysis unit can convert the image signal into a data signal to determine the annular diameter of the oil spot. The storage unit is used to store the test program and other contents. The voice prompt module is used to prompt the test steps, which is convenient for inexperienced test personnel to operate the device. Specific implementation method 2

[0043] This specific embodiment provides a gearbox ventilation system performance test method, using the gearbox ventilation system performance test device of specific embodiment 1, including the following steps:

[0044] S01: Install the gearbox to be tested 13;

[0045] S02: With the help of the display, adjust the position of the industrial camera to ensure that it is opposite to the vent plug 2;

[0046] S03: Adjust the position of nozzle 1 to ensure that it is opposite to the vent plug;

[0047] S04: Conduct the experiment;

[0048] S05: After the test, analyze the oil temperature, oil pressure, oil leakage and water content of the lubricating oil.

[0049] Before S05, in this specific implementation, the following steps are arranged between S02 and S01, the oil pressure range and oil temperature range for the qualified ventilation system are divided into grades, and the evaluation weights of oil temperature, oil pressure, rain protection (water content) and oil leakage (radial diameter of oil spots) are allocated in combination with the use environment of the gearbox 13 to be tested, and stored in the controller 9. According to the vehicle working condition of the gearbox, at least two working modes of the gearbox 13 to be tested are set and stored in the controller 9. The working mode parameters include the gear position of the gearbox, the speed of the drive motor 7, the angle change range of the gearbox 13 to be tested, and the gearbox 13 to be tested. range; in S05, the controller 9 calculates the performance level of the ventilation system of the gearbox 13 to be tested according to the assigned weights; by dividing the index levels and weights, the controller 9 can quantitatively obtain the performance of the ventilation system, so that the designer can determine whether further optimization is needed according to the gearbox operating conditions. At the same time, the gearbox working mode is set in combination with the vehicle working conditions, so that the various parameters set in the test have a synergistic effect, making the gearbox working condition simulation closer to the actual working conditions, increasing the test dimension of the ventilation system performance, avoiding excessive optimization design, and shortening the design cycle and cost.

[0050] In S03, when adjusting the position of the nozzle 1, an absorbent cotton containing anhydrous copper sulfate can be placed around the vent plug. The absorbent cotton is put on the vent plug. It turns blue when it comes into contact with water. The discolored area is observed to determine whether the adjustment is in place.

[0051] In S04, the corresponding vehicle operating conditions are selected in turn through the touch screen for testing, and the corresponding gearbox use environment is selected for testing under the vehicle operating conditions, so as to comprehensively detect whether the ventilation system of the gearbox meets the standards; when performing rain protection detection, the gearbox 13 to be tested is in a horizontal position and works in a high gear, and the oil temperature should be at least above 60°C. When the oil temperature is above 60°C, the pressure in the gearbox reaches the maximum. At this time, spraying is performed to more strictly detect the rain protection performance, and the spray flow rate is adjusted to 10L / min.

[0052] In this specific implementation, the gearbox to be tested is in the development stage, and corresponding mounting holes can be opened at positions that do not affect its performance for mounting various sensors in this method.

[0053] In this specific implementation, a classification level of indicators for the gearbox to be tested is provided, as shown in the following table:

[0054]

[0055] In this specific implementation, the weights ni of various indicators provided according to the use environment of the gearbox are provided, as shown in the following table:

[0056]

[0057]

[0058] Note: The dry, humid, high temperature and normal temperature environments defined in the table all refer to the natural environment of the working area where the gearbox is located, and are determined by comparing the relevant parameters of the natural environment where the gearbox is manufactured.

[0059] The calculation module calculates the performance level of the ventilation system of the gearbox 13 to be tested according to the following formula:

[0060]

[0061] Where X is the ventilation system performance level (full score 100), X i is the level of the corresponding indicator, and ni is the weight of the corresponding indicator.

[0062] In this specific implementation, the setting of parameters under different vehicle working conditions is provided, taking an eight-speed gearbox as an example, as shown in the following table:

[0063]

[0064] From the above specific implementations, it can be seen that the present invention has the following beneficial effects:

[0065] 1. By setting up the oil pressure sensor 3, oil temperature sensor 4, lubricating oil water content detection sensor and oil leakage detection component, the air pressure balance performance, heat dissipation performance, rainproof performance and oil leakage performance of the ventilation system can be fully tested, and the gearbox ventilation system can be fully tested, which is convenient for designers to make accurate judgments;

[0066] 2. By installing the mounting plate 12 in a tilted form at one end, the gearbox 13 to be tested can simulate the situation of going uphill and downhill with the whole vehicle, thereby improving the accuracy and comprehensiveness of the simulation of the gearbox working condition of the device, and more accurately and comprehensively verifying whether the test ventilation system meets the use requirements;

[0067] 3. The adjustment end of the mounting plate 12 is driven to lift up by the lifting motor and the lead screw 10, which can improve the control accuracy and make the simulation closer to the actual working condition of the gearbox;

[0068] 4. By setting a plurality of connection holes on the mounting flange 5, it is possible to meet the installation and testing requirements of gearboxes 13 to be tested of various sizes, thereby improving the applicability and flexibility of the device;

[0069] 5. The use of lubricating oil water content detection sensor can accurately and quantitatively reflect the rain protection status of the vent plug;

[0070] 6. By setting up an industrial camera, the color change of the qualitative filter paper can be reflected to the controller 9, and the controller 9 performs quantitative analysis of the oil leakage, and the analysis result is more accurate;

[0071] 7. The nozzle 1 is connected through a universal bamboo tube, and the position of the nozzle 1 can be adjusted according to the position of the vent plug 2, thereby improving the accuracy of rainproof performance detection;

[0072] 8. By dividing the index levels and weights, the controller 9 can quantitatively obtain the ventilation system performance, so that the designer can determine whether further optimization is needed according to the working conditions. At the same time, the working mode of the gearbox is set in combination with the vehicle working conditions, so that the parameters set in the test have a synergistic effect, making the gearbox working condition simulation closer to the actual working conditions, increasing the test dimension of the ventilation system performance, avoiding excessive optimization design, and shortening the design cycle and cost.

[0073] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gearbox ventilation system performance test device, comprising a mounting seat, characterized in that: Also includes, Controller (9); The mounting seat is used to carry the gearbox to be tested, and a drive motor (7) is arranged on the mounting seat. The drive motor (7) is used to provide power to the gearbox to be tested, and the drive motor (7) is electrically connected to the controller (9); An oil temperature sensor (4), the oil temperature sensor (4) being capable of extending into the gearbox to be tested so as to be used for testing the oil temperature of the gearbox to be tested, the oil temperature sensor (4) being electrically connected to the controller (9); An oil pressure sensor (3), the oil pressure sensor (3) being able to extend into the gearbox to be tested and used to test the oil pressure of the gearbox to be tested, the oil pressure sensor (3) being electrically connected to the control; An oil leakage detection component, the oil leakage detection component is used to detect whether there is an oil leakage; a lubricating oil water content detection sensor, the lubricating oil water content detection sensor being used to detect the water content of the gearbox lubricating oil to be tested, the lubricating oil water content detection sensor being electrically connected to the controller (9); A spray assembly, the spray assembly being arranged on the front support frame, the spray assembly comprising a spray head (1), the spray head (1) being arranged opposite to the gearbox vent plug (2) to be tested, and being used for spraying water to the vent plug (2) to simulate a raining process, the spray assembly being electrically connected to the controller (9).

2. The gearbox ventilation system performance testing device according to claim 1, characterized in that: The mounting seat comprises a supporting frame 1 (15) and a supporting frame 2 (14) which are arranged opposite to each other, a mounting plate (12) is arranged between the supporting frame 1 (15) and the supporting frame 2 (14), a hinge seat is arranged at the supporting end of the mounting plate (12), the hinge seat is hinged to the supporting frame 1 (15), the moving end of the mounting plate (12) can move up and down along the supporting frame 2 (14), the driving motor (7) is arranged on the mounting plate (12), and a fixing component is arranged at the front end of the mounting plate (12), and the fixing component is used for detachably mounting the gearbox to be tested.

3. The gearbox ventilation system performance testing device according to claim 2, characterized in that: A wire seat (11) is provided at the moving end of the mounting plate (12), and guide posts are provided at both ends of the wire seat (11). The guide posts are provided in corresponding guide grooves of the second support frame (14), and the guide posts can move up and down along the guide grooves. The wire seat (11) is provided on a lead screw (10), and the lead screw (10) passes through the mounting plate (12) and a lifting motor is provided at the lower end.

4. The gearbox ventilation system performance testing device according to claim 3, characterized in that: The fixing assembly adopts a mounting flange (5), the mounting flange (5) is coaxially arranged with the motor shaft of the driving motor (7), at least two circles of connecting holes are arranged on the end face of the mounting flange (5), and the outer circumferential surface of the mounting flange (5) is connected to the supporting frame (15).

5. The gearbox ventilation system performance testing device according to any one of claims 1 to 4, characterized in that: The oil leakage detection component comprises an industrial camera and qualitative filter paper, wherein the qualitative filter paper is in a ring-shaped structure, the qualitative filter paper is sleeved on the vent plug (2) and fits with the surface of the gearbox to be tested, the industrial camera can be arranged relative to the qualitative filter paper, and the industrial camera is electrically connected to the control module.

6. The gearbox ventilation system performance testing device according to claim 5, characterized in that: The industrial camera is connected to the mounting base via a gooseneck tube.

7. The gearbox ventilation system performance testing device according to claim 5, characterized in that: The spray assembly further comprises a water tank and a water pump, wherein the water pump is electrically connected to the controller (9), and the water pump is connected to the spray head (1) via a universal bamboo tube, and a flow rate sensor is provided at the water outlet end of the water pump, and the flow rate sensor is electrically connected to the controller (9).

8. The gearbox ventilation system performance testing device according to claim 7, characterized in that: The controller (9) comprises a control cabinet, the control cabinet is arranged on one side of the mounting seat, a display and a voice prompter are arranged on the control cabinet, a control module is arranged in the control cabinet, the control module comprises a calculation unit, an image analysis unit and a storage unit, and the control module also comprises a USB interface.

9. A method for testing the performance of a gearbox ventilation system, characterized in that: The gearbox ventilation system performance testing device as claimed in claim 8 comprises the following steps: S01: Install the gearbox to be tested; S02: With the help of the monitor, adjust the position of the industrial camera to ensure that it is opposite to the vent plug; S03: Adjust the position of the nozzle to ensure that it is opposite to the vent plug; S04: Conduct the experiment; S05: After the test, analyze the oil temperature, oil pressure, oil leakage and water content of the lubricating oil.

10. The gearbox ventilation system performance testing method according to claim 9, characterized in that: Before S05, the oil pressure range and oil temperature range used by the qualified ventilation system are divided into levels, and combined with the use environment of the gearbox to be tested, the evaluation weights of oil temperature, oil pressure, rain protection and oil leakage are allocated and stored in the controller. According to the working condition of the whole vehicle in which the gearbox is located, at least two working modes of the gearbox to be tested are set and stored in the controller. The working mode parameters include the gearbox gear, the drive motor speed, and the angle variation range of the gearbox to be tested. In S05, the controller calculates the performance level of the ventilation system of the gearbox to be tested according to the allocated weights.

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