Speed reducer shaft seal test method and test system

Abstract

According to the speed reducer shaft seal test method and test system provided by the invention, the test system can more accurately reflect the working performance of the oil seal in a complex environment by simulating the actual scene of wading driving of an automobile in rainy days, and the highly restored test environment is beneficial to improving the accuracy and reliability of a test result. By controlling the motor, the first dynamometer and the second dynamometer to respectively work under specific working conditions, the running states of the speed reducer under different load and rotating speed conditions can be simulated, and the sealing performance of the oil seal under different working conditions can be more comprehensively evaluated through the comprehensive test condition setting.

Description

Technical Field

[0001] The present application relates to the technical field of reducer testing, and in particular to a testing method and a testing system for a reducer shaft seal. Background Art

[0002] Oil seal is a common name for general seals, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to general liquid substances). It isolates the parts that need lubrication from the output parts in the transmission parts to prevent the lubricating oil from leaking. The seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] The working principle of the skeleton oil seal is to maintain the closed circulation of the internal lubricating oil under dynamic and static conditions through its special rubber sealing structure to ensure the normal operation and lubrication of the vehicle transmission system. This sealing principle is crucial to the performance and reliability of the vehicle.

[0004] The oil seal on the reducer housing of new energy vehicles and the half-shaft is an important sealing device. It creates an isolation barrier through the rubber dynamic sealing structure to prevent the entry of impurities such as moisture, mud and sand from the external environment, and prevents the lubricating oil inside the reducer from leaking from the half-shaft connection.

[0005] The existing technology usually uses oil injection observation, water immersion leak detection and airtight leak detection for shaft seal status testing, but lacks the function of leak detection test for oil seals under water wading conditions of the whole vehicle. The test scenario cannot highly restore the actual driving condition of the car, and there are problems with low test quality and test reliability. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a test method and a test system for a reducer shaft seal, so as to solve the problems of the existing reducer shaft seal test, which lacks a leak detection test function for the oil seal under the whole vehicle wading condition, and the test scenario cannot highly restore the actual driving condition of the car, and there are problems of low test quality and test reliability.

[0007] A method for testing a reducer shaft seal provided in an embodiment of the present application includes:

[0008] Connect the reducer assembly to be tested to the test system;

[0009] Control the motor to work under the working condition of the motor parameters, control the first dynamometer to work under the working condition of the first load parameters, and control the second dynamometer to work under the working condition of the second load parameters; wherein the first dynamometer is connected to one end of the half shaft, and the other end of the half shaft is connected to the second dynamometer;

[0010] Use the spraying equipment to take water from the water tank and spray it onto the oil seal of the reducer to be tested according to the set spraying parameters; wherein the water tank is added with a fluorescent leak detection agent;

[0011] After the first dynamometer, the second dynamometer and the spraying equipment have been operating for a set time, an oil sample is released from the reducer to be tested;

[0012] Test the oil sample with a UV lamp. If no fluorescent leak detector is detected, it is determined that the oil seal is in normal condition under the current working conditions.

[0013] In the above technical solution, by simulating the actual scene of a car wading in rainy days, the test system can more accurately reflect the working performance of the oil seal in a complex environment. This highly restored test environment helps to improve the accuracy and reliability of the test results. By controlling the motor, the first dynamometer and the second dynamometer to work under specific working conditions, the operating state of the reducer under different load and speed conditions can be simulated. This comprehensive test condition setting can more comprehensively evaluate the sealing performance of the oil seal under different working conditions.

[0014] In some optional embodiments, after the oil sample is tested with a UV lamp, the method further comprises:

[0015] If the fluorescent leak detector is detected, it is determined that the oil seal has failed under the current operating conditions.

[0016] In some optional embodiments, PTI fine test dust is also added to the water storage tank, and the PTI fine test dust is mixed with the water in the water storage tank to form muddy water;

[0017] Use the spraying equipment to take water from the water tank and spray it onto the oil seal of the reducer to be tested according to the set spraying parameters, including:

[0018] Use the spraying equipment to take muddy water from the water tank, and spray the muddy water onto the oil seal of the reducer to be tested according to the set spraying parameters.

[0019] In the above technical solution, after adding PTI fine test dust, what is sprayed onto the oil seal is not only water, but also a mixture of mud and water, which further simulates the driving condition of a car under harsh road conditions (such as muddy and slippery roads), making the test environment closer to the complex conditions in the real world.

[0020] In some optional implementations, after determining that the oil seal state is normal under the current working condition, the method further includes:

[0021] Change the parameter values ​​of the motor parameter and / or the first load parameter and / or the second load parameter and / or the spray parameter, and perform the test again.

[0022] In the above technical solution, by changing different parameter values ​​and conducting multiple tests, the sealing performance of the oil seal under different working conditions can be comprehensively evaluated. By testing under different working conditions, the adaptability of the oil seal to various operating conditions can be verified, which helps to ensure that the product can maintain good sealing performance under different road conditions and different driving habits, and improve the overall adaptability and market competitiveness of the product.

[0023] In some optional embodiments, the spraying parameters include at least one of the following: spraying time, spraying interval, nozzle pressure, and water pump speed.

[0024] In the above technical solution, by precisely controlling the spraying time, it is possible to simulate wading conditions at different time lengths and evaluate the changes in the sealing performance of the oil seal when exposed to water at different times. The introduction of the spraying interval makes the test closer to the intermittent wading conditions in actual driving, which helps to discover potential problems of the oil seal in intermittent wet environments. The adjustment of the nozzle pressure can simulate water flow impacts of different intensities and test the sealing stability and durability of the oil seal under different pressure conditions. The adjustment of the water pump speed directly affects the flow and intensity of the spray, providing more variable control for the test, making the test results more comprehensive and accurate.

[0025] In some optional embodiments, the motor parameters include at least one of the following: motor output speed, reducer input torque, and drive direction.

[0026] In the above technical solution, by adjusting the output speed of the motor, the working state of the reducer at different speeds can be simulated, which helps to evaluate the sealing performance of the oil seal under different speed conditions (such as low speed, medium speed, and high speed), so as to have a more comprehensive understanding of the performance of the oil seal in actual use. The magnitude of the reducer input torque directly affects the stress conditions of its internal gears and bearings. The change of driving direction can simulate the working conditions of the car in different driving directions, such as forward and backward, which helps to evaluate the sealing performance of the oil seal in different driving directions and ensure that it can maintain a good sealing effect under various driving conditions.

[0027] In some optional embodiments, the first load parameter includes at least one of the following: a first load motor speed, a first load speed acceleration, a first load torque loading time, and a first load torque;

[0028] The second load parameter includes at least one of the following: a second load motor speed, a second load speed acceleration, a second load torque loading time, and a second load torque.

[0029] In the above technical solution, by adjusting the motor speed, speed acceleration, torque loading time and torque parameters of the first load and the second load, a more complex and dynamic load change scenario can be simulated. This in-depth simulation helps to evaluate the sealing performance of the oil seal under different load change conditions, including sudden loading, continuous loading, periodic loading, etc. Combined with different load parameter settings, it can cover various working conditions that the reducer may encounter in actual use, including low speed and high torque, high speed and low torque, rapid acceleration, rapid deceleration, etc. This comprehensive coverage of working conditions can more accurately reflect the performance of the oil seal in actual use.

[0030] A test system for a reducer shaft seal provided in an embodiment of the present application includes: a control device, a first dynamometer, a second dynamometer, a water storage tank, a spray device, and a motor;

[0031] The first dynamometer is connected to one end of the half shaft, and the other end of the half shaft is connected to the second dynamometer; a fluorescent leak detection agent is added to the water storage tank; the spraying equipment is used to take water from the water storage tank and spray it to the oil seal of the reducer to be tested; the motor is used to drive the reducer;

[0032] The control device is used to: control the motor to work under the working conditions of motor parameters, control the first dynamometer to work under the working conditions of first load parameters, and control the second dynamometer to work under the working conditions of second load parameters; control the spraying device to take water from the water tank and spray it to the oil seal of the reducer to be tested according to the set spraying parameters; control the first dynamometer, the second dynamometer and the spraying device to work for the set time.

[0033] In the above technical solution, the test system can realize a comprehensive test of the reducer shaft sealing performance by integrating multiple components such as the control device, the first dynamometer, the second dynamometer, the water tank, the spray equipment and the motor. By controlling the working parameters of the motor, the two dynamometers and the spray equipment respectively, a variety of complex and real working conditions can be simulated, thereby comprehensively evaluating the sealing performance of the oil seal under different working conditions.

[0034] In some optional embodiments, the spraying device includes: a spraying pipeline, a spray head, a solenoid valve, an air flow valve, a water pump and a pressure sensor;

[0035] The water pump draws water from the water tank and sprays it onto the oil seal of the reducer to be tested through the spray pipe and nozzle;

[0036] The solenoid valve is connected to the air flow valve, and the solenoid valve is used to control the opening and closing of the air flow valve; when the air flow valve is opened, compressed air blows the water to make the water flow spray out from the nozzle, and the opening of the air flow valve controls the water flow pressure; the pressure sensor is used to detect the water flow pressure.

[0037] In the above technical solution, the water flow pressure sprayed to the oil seal can be accurately adjusted by controlling the opening of the air flow valve, and the water flow pressure can be monitored in real time by using a pressure sensor. The rapid opening and closing capability of the solenoid valve allows the spraying process to be controlled more flexibly.

[0038] In some optional implementations, the control device includes: a host computer and a PLC control unit;

[0039] The host computer is connected to a first end of the PLC control unit, a second end of the PLC control unit is connected to the solenoid valve, a third end of the PLC control unit is connected to the air flow valve, and a fourth end of the PLC control unit is connected to the water pump.

[0040] In the above technical solution, the host computer acts as the main controller and realizes centralized control of the entire test system by connecting to the PLC control unit. The PLC control unit acts as the lower computer and is responsible for executing control instructions and communicating with each controlled device (such as solenoid valves, air flow valves, water pumps, etc.). The PLC control unit has a powerful timing control capability and can accurately control the opening and closing time of each controlled device, as well as the sequence between them, to ensure the accuracy and consistency of each operation during the test.

[0041] In some optional embodiments, the nozzle includes: a steel ring and a plurality of ball-end nozzles; the steel ring is sleeved on the half shaft; and the plurality of ball-end nozzles are welded to the through hole of the steel ring, thereby forming a universal nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A flow chart of the steps of a test method for a reducer shaft seal provided in an embodiment of the present application;

[0044] Figure 2 A functional module diagram of a reducer shaft seal test system provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of a test system for a reducer shaft seal is provided for an embodiment of the present application;

[0046] Figure 4 A diagram of the nozzle structure provided in the embodiment of the present application;

[0047] Figure 5Schematic diagram of the oil seal, half shaft and nozzle provided in the embodiment of the present application;

[0048] Figure 6 A flow chart of a clean water mode test provided in an embodiment of the present application;

[0049] Figure 7 A muddy water mode test flow chart provided for an embodiment of the present application.

[0050] Icons: 1- reducer, 2- first dynamometer, 3- second dynamometer, 4- motor, 5- spray equipment, 51- spray head, 52- pressure sensor, 6- water tank, 7- control equipment, 8- half shaft, 9- oil seal. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0052] Please refer to Figure 1 , Figure 1 A flow chart of the steps of a test method for a reducer shaft seal provided in an embodiment of the present application specifically includes:

[0053] Step 100, connecting the reducer assembly to be tested to the test system;

[0054] Step 200, controlling the motor 4 to work under the working condition of the motor parameters, controlling the first dynamometer 2 to work under the working condition of the first load parameters, and controlling the second dynamometer 3 to work under the working condition of the second load parameters; wherein the first dynamometer 2 is connected to one end of the half shaft 8, and the other end of the half shaft 8 is connected to the second dynamometer 3;

[0055] Step 300: Take water from the water tank 6 using the spraying device 5, and spray it onto the oil seal 9 of the reducer 1 to be tested according to the set spraying parameters; wherein a fluorescent leak detection agent is added to the water tank 6;

[0056] Step 400: After the first dynamometer 2, the second dynamometer 3 and the spraying device 5 have been operating for a set time, an oil sample is released from the reducer 1 to be tested;

[0057] Step 500: Use a purple light lamp to detect the oil sample. If no fluorescent leak detection agent is detected, it is determined that the oil seal 9 is in a normal state under the current working condition.

[0058] In the embodiment of the present application, by simulating the actual scene of a car wading in rainy days, the test system can more accurately reflect the working performance of the oil seal 9 in a complex environment. This highly restored test environment helps to improve the accuracy and reliability of the test results. By controlling the motor 4, the first dynamometer 2 and the second dynamometer 3 to work under specific working conditions, the operating state of the reducer 1 under different load and speed conditions can be simulated. This comprehensive test condition setting can more comprehensively evaluate the sealing performance of the oil seal 9 under different working conditions.

[0059] In some optional embodiments, in step 500, after the oil sample is tested with a UV lamp, the process further includes: if a fluorescent leak detector is detected, it is determined that the oil seal 9 is failed under the current working condition.

[0060] In some optional embodiments, PTI fine test dust is also added into the water storage tank 6, and the PTI fine test dust is mixed with the water in the water storage tank 6 to form muddy water.

[0061] Correspondingly, in step 300, water is taken from the water tank 6 by using the spraying equipment 5, and the water is sprayed onto the oil seal 9 of the reducer 1 to be tested according to the set spraying parameters, including: muddy water is taken from the water tank 6 by using the spraying equipment 5, and the muddy water is sprayed onto the oil seal 9 of the reducer 1 to be tested according to the set spraying parameters.

[0062] In the embodiment of the present application, after adding PTI fine test dust, what is sprayed onto the oil seal 9 is not only water but also a mud-water mixture, which further simulates the driving condition of a car under harsh road conditions (such as muddy and slippery roads), making the test environment closer to the complex conditions in the real world.

[0063] In some optional implementations, after determining that the oil seal 9 is in a normal state under the current working condition in step 500, the following further comprises:

[0064] Step 600: Change the parameter values ​​of the motor parameter and / or the first load parameter and / or the second load parameter and / or the spray parameter, and re-test.

[0065] In the embodiment of the present application, by changing different parameter values ​​and performing multiple tests, the sealing performance of the oil seal 9 under different working conditions can be comprehensively evaluated. By testing under different working conditions, the adaptability of the oil seal 9 to various operating conditions can be verified, which helps to ensure that the product can maintain good sealing performance under different road conditions and different driving habits, and improve the overall adaptability and market competitiveness of the product.

[0066] In some optional embodiments, the spraying parameters include at least one of the following: spraying time, spraying interval, nozzle pressure, and water pump speed.

[0067] In the embodiment of the present application, by precisely controlling the spraying time, it is possible to simulate wading conditions at different time lengths, and evaluate changes in the sealing performance of the oil seal 9 when exposed to water at different times. The introduction of the spraying interval makes the test closer to the intermittent wading conditions in actual driving, and helps to discover potential problems of the oil seal 9 in intermittent wet environments. The adjustment of the nozzle pressure can simulate water flow impacts of different intensities and test the sealing stability and durability of the oil seal 9 under different pressure conditions. The adjustment of the water pump speed directly affects the flow rate and intensity of the spray, providing more variable control for the test, making the test results more comprehensive and accurate.

[0068] In some optional embodiments, the motor parameters include at least one of the following: motor output speed, reducer input torque, and drive direction.

[0069] In the embodiment of the present application, by adjusting the output speed of the motor 4, the working state of the reducer 1 at different speeds can be simulated, which helps to evaluate the sealing performance of the oil seal 9 under different speed conditions (such as low speed, medium speed, and high speed), so as to more comprehensively understand the performance of the oil seal 9 in actual use. The magnitude of the reducer input torque directly affects the stress conditions of its internal gears and bearings. The change of the driving direction can simulate the working conditions of the car in different driving directions, such as forward, backward, etc., which helps to evaluate the sealing performance of the oil seal 9 in different driving directions and ensure that it can maintain a good sealing effect under various driving conditions.

[0070] In some optional embodiments, the first load parameter includes at least one of the following: a first load motor speed, a first load speed acceleration, a first load torque loading time, and a first load torque;

[0071] The second load parameter includes at least one of the following: a second load motor speed, a second load speed acceleration, a second load torque loading time, and a second load torque.

[0072] In the embodiment of the present application, by adjusting the motor speed, speed acceleration, torque loading time and torque parameters of the first load and the second load, a more complex and dynamic load change scenario can be simulated. This in-depth simulation helps to evaluate the sealing performance of the oil seal 9 under different load change conditions, including sudden loading, continuous loading, periodic loading, etc. Combined with different load parameter settings, it can cover various working conditions that the reducer 1 may encounter in actual use, including low speed and high torque, high speed and low torque, rapid acceleration, rapid deceleration, etc. This comprehensive working condition coverage can more accurately reflect the performance of the oil seal 9 in actual use.

[0073] Please refer to Figure 2 , Figure 2A functional module diagram of a test system for the shaft seal of a reducer 1 provided in an embodiment of the present application includes: a control device 7, a first dynamometer 2, a second dynamometer 3, a water tank 6, a spray device 5 and a motor 4.

[0074] Among them, the first dynamometer 2 is connected to one end of the half shaft 8, and the other end of the half shaft 8 is connected to the second dynamometer 3; the water tank 6 is filled with fluorescent leak detection agent; the spraying device 5 is used to take water from the water tank 6 and spray it to the oil seal 9 of the reducer 1 to be tested; the motor 4 is used to drive the reducer 1. The control device 7 is used to: control the motor 4 to work under the working condition of the motor parameter, control the first dynamometer 2 to work under the working condition of the first load parameter, and control the second dynamometer 3 to work under the working condition of the second load parameter; control the spraying device 5 to take water from the water tank 6, and spray it to the oil seal 9 of the reducer 1 to be tested according to the set spraying parameters; control the first dynamometer 2, the second dynamometer 3 and the spraying device 5 to work for a set time.

[0075] In the embodiment of the present application, the test system can realize a comprehensive test of the shaft sealing performance of the reducer 1 by integrating multiple components such as the control device 7, the first dynamometer 2, the second dynamometer 3, the water storage tank 6, the spray device 5 and the motor 4. By controlling the working parameters of the motor 4, the two dynamometers and the spray device 5 respectively, a variety of complex and real working conditions can be simulated, thereby comprehensively evaluating the sealing performance of the oil seal 9 under different working conditions.

[0076] In some optional implementations, the spraying device 5 includes: a spraying pipeline, a spray head 51 , a solenoid valve, an air flow valve, a water pump and a pressure sensor 52 .

[0077] Among them, the water pump takes water from the water tank 6 and sprays it to the oil seal 9 of the reducer 1 to be tested through the spray pipe and the nozzle 51; the solenoid valve is connected to the air flow valve, and the solenoid valve is used to control the opening and closing of the air flow valve; when the air flow valve is opened, compressed air blows the water to make the water flow spray out from the nozzle 51, and the opening of the air flow valve controls the water flow pressure; the pressure sensor 52 is used to detect the water flow pressure.

[0078] In the embodiment of the present application, the water flow pressure sprayed to the oil seal 9 can be accurately adjusted by controlling the opening of the air flow valve, and the water flow pressure can be monitored in real time by the pressure sensor 52. The rapid opening and closing capability of the solenoid valve allows the spraying process to be controlled more flexibly.

[0079] In some optional implementations, the control device 7 includes: a host computer and a PLC control unit.

[0080] The host computer is connected to the first end of the PLC control unit, the second end of the PLC control unit is connected to the solenoid valve, the third end of the PLC control unit is connected to the air flow valve, and the fourth end of the PLC control unit is connected to the water pump.

[0081] In the embodiment of the present application, the host computer is used as the main controller to realize the centralized control of the entire test system by connecting the PLC control unit. The PLC control unit is used as the lower computer, which is responsible for the specific execution of the control instructions and communicates with each controlled device (such as a solenoid valve, an air flow valve, a water pump, etc.). The PLC control unit has a powerful timing control capability, which can accurately control the opening and closing time of each controlled device, as well as the sequence between them, to ensure the accuracy and consistency of each operation during the test.

[0082] For details, please refer to Figure 3 , Figure 3 A schematic diagram of a test system for the shaft seal of a reducer 1 is provided for an embodiment of the present application. The test system includes a first dynamometer 2, a second dynamometer 3, a spray device 5, a control device 7 (not shown in the figure), a water tank 6 and a motor 4 (not shown in the figure). Among them, the control device 7 includes a host computer and a PLC control unit, and the spray device 5 includes a solenoid valve, a compressed air flow valve, a water pump and a spray head 51, etc.

[0083] The PLC control unit is controlled by the upper computer to issue the following commands: the command to control the on and off of the solenoid valve, the command to control the opening of the compressed air flow valve, and the command to control the on and off of the water pump power supply. The above three commands are used to realize the pulse spraying function of the water flow. Clean water and muddy water can be stored in the water storage tank 6. The muddy water is made by mixing PTI fine test dust and clean water in a ratio of 1:100, forming two modes of clean water spraying and muddy water spraying. Fluorescent leak detection agent is added to clean water or muddy water in a ratio of 1:1000. With the help of ultraviolet light, leak detection can be performed, and oil samples inside the sample to be tested can be extracted to detect whether the oil sample contains fluorescent agent, and determine whether muddy water or clean water passes through the oil seal 9 and enters the inside of the reducer 1 sample to be tested.

[0084] The reducer 1 to be tested is supported by three column brackets and connected and fixed by bolts. The three columns are connected by bolts and fixed to the bottom surface of the water tank 6. The output ends of the reducer 1 to be tested are connected to the left and right dynamometers through the half shaft 8. The flat plate is welded to the side of the water tank 6, and the spray equipment 5 is placed on the flat plate and fixed by bolts. Please refer to Figure 4 , Figure 4 This is a structural diagram of the nozzle 51 provided in the embodiment of the present application. The nozzle 51 adopts a ball nozzle, and six ball nozzles are welded to the through holes of the steel ring to form a universal nozzle 51. The universal nozzle 51 is supported by a bracket and fixed to the bottom surface of the water tank 6 by bolts. The half shaft 8 passes through the steel ring of the universal nozzle 51.

[0085] Please refer to Figure 5 , Figure 5Schematic diagram of the oil seal 9, half shaft 8 and nozzle 51 provided in the embodiment of the present application. Six solenoid valves and six compressed air flow valves are provided corresponding to the six ball nozzles, which are divided into six routes. Each route is connected in series with a solenoid valve and a compressed air flow valve, and then connected to the ball nozzle by a spray pipeline. For example: when working, the solenoid valve is opened intermittently with a step length of 0.5 seconds. During this period, the water flow passing through is blown by compressed air, and finally the water flow is sprayed out by the ball nozzle. The pressure of the sprayed water flow is controlled by adjusting the valve opening of the compressed air flow valve. The spray pipeline is a threaded joint water pipe.

[0086] Please refer to Figure 6 , Figure 6 The clean water mode test flow chart provided in the embodiment of the present application specifically includes:

[0087] Step 1: Mechanical part installation: install the reducer sample to be tested on three load-bearing columns, and place the whole in the water tank, and fix it to the bottom of the water tank with bolts. First install the universal sprinkler and other spray equipment parts, and finally connect the half-axle, the first dynamometer and the second dynamometer.

[0088] Step 2: Fill the water tank to 2 / 3 and add fluorescent leak detection agent in proportion. Use the upper computer to control the PLC control unit to perform a pre-spray test to confirm that the spraying equipment can work normally.

[0089] Step 3: Control the first dynamometer and the second dynamometer to prepare for speed and torque loading, and confirm that the first dynamometer and the second dynamometer are working normally.

[0090] Step 4: The formal test begins, and the relevant parameters in the dynamometer test condition table are set to simulate the reducer vehicle working condition.

[0091] Step 5: The spray equipment is set according to the relevant parameters in the spray equipment working table to simulate the water spraying state.

[0092] Step 6: After the first dynamometer, the second dynamometer and the spraying equipment have completed their work within the set time, release 100ml of oil sample from the reducer to be tested and use a purple light to detect whether there is leak detection agent in the oil sample to determine whether the oil seal is in normal condition.

[0093] Step 7: If the oil sample does not contain leak detector, it proves that the oil seal functions normally. Add the oil sample back into the reducer to be tested, replace the parameters of the dynamometer test condition table and the spray equipment condition table, and conduct other condition tests. If the oil sample contains leak detector, it proves that the oil seal fails under this condition.

[0094] Please refer to Figure 7 , Figure 7 The muddy water mode test flow chart provided for the embodiment of the present application specifically includes:

[0095] Step 1: Mechanical part installation: install the reducer sample to be tested on three load-bearing columns, and place the whole in the water tank, and fix it to the bottom of the water tank with bolts. First install the universal sprinkler and other spray equipment parts, and finally connect the half-axle, the first dynamometer and the second dynamometer.

[0096] Step 2: Mix PTI fine test dust and clean water in a ratio of 1:100 to form muddy water. Fill the water tank to 2 / 3 and the water storage tank to 2 / 3. Add fluorescent leak detection agent in proportion. Use the upper computer to control the PLC control unit to perform pre-spraying detection to confirm that the spraying equipment can work normally.

[0097] Step 3: Control the first dynamometer and the second dynamometer to prepare for speed and torque loading, and confirm that the first dynamometer and the second dynamometer are working normally.

[0098] Step 4: The formal test begins, and the relevant parameters in the dynamometer test condition table are set to simulate the reducer vehicle working condition.

[0099] Step 5: The spray equipment is set according to the relevant parameters in the spray equipment working table to simulate the water spraying state.

[0100] Step 6: After the first dynamometer, the second dynamometer and the spraying equipment have completed their work within the set time, release 100ml of oil sample from the reducer to be tested and use a purple light to detect whether there is leak detection agent in the oil sample to determine whether the oil seal is in normal condition.

[0101] Step 7: If the oil sample does not contain leak detector, it proves that the oil seal functions normally. Add the oil sample back into the reducer to be tested, replace the parameters of the dynamometer test condition table and the spray equipment condition table, and conduct other condition tests. If the oil sample contains leak detector, it proves that the oil seal fails under this condition.

[0102] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0103] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0105] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0106] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A test method for reducer shaft seal, characterized in that: include: Connect the reducer assembly to be tested to the test system; Control the motor to work under the working condition of the motor parameters, control the first dynamometer to work under the working condition of the first load parameters, and control the second dynamometer to work under the working condition of the second load parameters; wherein the first dynamometer is connected to one end of the half shaft, and the other end of the half shaft is connected to the second dynamometer; Using a spraying device to take water from a water tank, and spraying it onto the oil seal of the reducer to be tested according to the set spraying parameters; wherein a fluorescent leak detection agent is added to the water tank; After the first dynamometer, the second dynamometer and the spraying equipment have been operating for a set time, an oil sample is released from the reducer to be tested; The oil sample is tested with a purple light lamp. If no fluorescent leak detector is detected, it is determined that the oil seal is in normal condition under the current working condition; if the fluorescent leak detector is detected, it is determined that the oil seal is ineffective under the current working condition.

2. The method according to claim 1, characterized in that PTI fine test dust is also added to the water storage tank, and the PTI fine test dust is mixed with the water in the water storage tank to form muddy water; The method of taking water from a water tank by using a spraying device and spraying the water to the oil seal of the reducer to be tested according to the set spraying parameters includes: The spraying equipment is used to take muddy water from the water storage tank, and the muddy water is sprayed onto the oil seal of the reducer to be tested according to the set spraying parameters.

3. The method according to claim 1, characterized in that After determining that the oil seal state is normal under the current working condition, the method further includes: Change the parameter values ​​of the motor parameter and / or the first load parameter and / or the second load parameter and / or the spray parameter, and re-test.

4. The method according to claim 1, characterized in that The spraying parameters include at least one of the following: spraying time, spraying interval, nozzle pressure, and water pump speed.

5. The method according to claim 1, characterized in that The motor parameters include at least one of the following: motor output speed, reducer input torque, and driving direction.

6. The method according to claim 1, characterized in that The first load parameter includes at least one of the following: a first load motor speed, a first load speed acceleration, a first load torque loading time, and a first load torque; The second load parameter includes at least one of the following: a second load motor speed, a second load speed acceleration, a second load torque loading time, and a second load torque.

7. A test system for reducer shaft seal, characterized in that: include: Control equipment, first dynamometer, second dynamometer, water storage tank, spray equipment and motor; The first dynamometer is connected to one end of the half shaft, and the other end of the half shaft is connected to the second dynamometer; a fluorescent leak detection agent is added to the water storage tank; the spraying device is used to take water from the water storage tank and spray it to the oil seal of the reducer to be tested; the motor is used to drive the reducer; The control device is used to: control the motor to operate under the working conditions of motor parameters, control the first dynamometer to operate under the working conditions of first load parameters, and control the second dynamometer to operate under the working conditions of second load parameters; control the spraying device to take water from the water tank and spray the water to the oil seal of the reducer to be tested according to the set spraying parameters; and control the first dynamometer, the second dynamometer and the spraying device to operate for a set time.

8. The system according to claim 7, characterized in that The spraying equipment includes: a spraying pipeline, a spray head, a solenoid valve, an air flow valve, a water pump and a pressure sensor; The water pump takes water from the water storage tank and sprays the water to the oil seal of the reducer to be tested through the spray pipeline and the spray head; The solenoid valve is connected to the air flow valve, and the solenoid valve is used to control the opening and closing of the air flow valve; when the air flow valve is opened, compressed air blows water to make the water flow spray out from the nozzle, and the opening of the air flow valve controls the water flow pressure; the pressure sensor is used to detect the water flow pressure.

9. The system according to claim 8, characterized in that The control device comprises: a host computer and a PLC control unit; The host computer is connected to a first end of the PLC control unit, a second end of the PLC control unit is connected to the solenoid valve, a third end of the PLC control unit is connected to the air flow valve, and a fourth end of the PLC control unit is connected to the water pump.

10. The system according to claim 8, characterized in that The nozzle comprises: a steel ring and a plurality of ball-end nozzles; the steel ring is sleeved on the half shaft; and the plurality of ball-end nozzles are welded on the through holes of the steel ring.

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