Gas-liquid two-phase lubricating oil friction experiment device

Abstract

The invention discloses a gas-liquid two-phase lubricating oil friction experiment device. The experiment device comprises a gas environment experiment cabin, a gas supply device, a micro-nano bubble generator, an exhaust device and a control unit, the micro-nano bubble generator is mounted in the gas environment experiment cabin; the gas supply device is connected with a gas inlet of the micro-nano bubble generator; the micro-nano bubble generator is used for crushing gas input by the gas supply device into micro-nano bubbles and then mixing the micro-nano bubbles with lubricating oil to form gas-liquid two-phase lubricating oil; the exhaust device is mounted at the top of the gas environment experiment module; the control unit is used for controlling the gas supply device, the gas environment experiment module, the micro-nano bubble generator and the exhaust device. The experimental device can be used for preparing the lubricating oil containing micro-nano bubbles and complex gas components and simulating the lubricating characteristics of the lubricating oil under different bubble concentrations on a friction interface, and has the characteristics of simplicity and convenience in operation, convenience in maintenance and high cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tribology, and in particular to a gas-liquid two-phase lubricating oil friction experimental device. Background Art

[0002] The research directions of automobile engine lubricants at home and abroad mainly include the development of additives, the improvement of energy-saving and environmental protection characteristics, and the recycling and reuse of lubricants. There are relatively few studies on the effects of micro-nano bubbles and complex gas components in lubricants on lubrication performance. During the long-term operation of the engine, the lubricating oil used for lubrication needs to face the effects of bubbles generated by the mechanical movement of engine parts and complex gases generated by the combustion process. Due to mechanical movement and oil circulation, a large number of bubbles will be generated inside the oil. These bubbles transform the lubricating oil into a gas-liquid two-phase state, which has a significant impact on the lubrication performance of the lubricating oil. At the same time, during the use of engine lubricants, they will continuously absorb and dissolve complex gas components from the combustion process, such as nitrogen oxides, sulfur oxides, hydrocarbons, etc. The presence of these gas components in the oil will change the chemical properties and physical state of the lubricating oil and affect its lubrication performance.

[0003] By simulating and testing gas-liquid two-phase lubricants containing micro-nano bubbles and complex gas components, the friction, wear and lubrication performance of lubricants can be more accurately evaluated. Currently, there is a lack of in-depth understanding of the behavior of these micro-nano bubbles in lubricants and their specific effects on lubrication performance, and there is a lack of matching experimental equipment for systematic research.

[0004] Therefore, it is necessary to develop a test device that can simulate the combined effects of micro-nano bubbles and complex gas components, which is of great significance for improving lubricant performance and engine reliability. In experimental research in the field of tribology, the precise design of environmental simulation equipment is crucial, and its core lies in the precise control and measurement of the size and concentration of micro-nano bubbles in lubricants. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a gas-liquid two-phase lubricating oil friction experimental device, which can prepare lubricating oil containing micro-nano bubbles and complex gas components, simulate the lubrication properties of lubricating oil at the friction interface under different bubble concentrations, and has the characteristics of simple operation, convenient maintenance, cleaning and high efficiency, and at the same time has high flexibility and diversity to adapt to diverse experimental conditions and needs.

[0006] In order to achieve the above object, the present invention adopts the following specific technical solutions:

[0007] A gas-liquid two-phase lubricating oil friction experimental device, the experimental device comprising a gas environment experimental chamber, a gas supply device, a micro-nano bubble generator, an exhaust device and a control unit;

[0008] The gas environment test chamber is used to provide a gas environment and gas-liquid two-phase lubricating oil for the friction pair;

[0009] The micro-nano bubble generator is installed in the gas environment experiment chamber;

[0010] The gas supply device is connected to the gas inlet of the micro-nano bubble generator;

[0011] The micro-nano bubble generator is used to break the gas input by the gas supply device into micro-nano bubbles and then mix them with lubricating oil to form gas-liquid two-phase lubricating oil;

[0012] The exhaust device is installed on the top of the gas environment experiment chamber, and is used to collect the gas leaked and exhausted from the gas environment experiment chamber, alarm after detecting gas leakage, and exhaust the toxic gas to ensure the safety of the experiment;

[0013] The control unit is used to control the gas supply device, the gas environment experiment chamber, the micro-nano bubble generator and the exhaust device, so as to control the friction environment in the gas environment experiment chamber.

[0014] Furthermore, the gas environment test chamber includes a chamber body, a flexible sealing film, a humidifying device, a heating device and a sensing device;

[0015] The flexible sealing film is sealingly mounted on the top of the cabin body, and a sealed cavity for friction experiment is formed between the cabin body and the flexible sealing film; a transmission member for driving the friction pair to move passes through the flexible sealing film and is sealed;

[0016] The humidifying device is in communication with the gas environment test chamber and is used to adjust the humidity in the gas environment test chamber;

[0017] The heating device is fixedly installed in the cabin and is used to adjust the temperature in the gas environment experiment cabin;

[0018] The sensor device is installed in the cabin and is used to monitor the temperature, pressure, humidity and gas concentration of different gas components of the gas environment in the gas environment experiment cabin;

[0019] The gas supply device is in communication with the cabin and is used to provide gas of set composition, pressure and concentration into the cabin to simulate various gas environments;

[0020] The control unit is connected to the humidifying device, the heating device and the sensing device, and is used to control the gas supply device, the humidifying device and the heating device according to the detection information of the sensing device, so as to monitor and accurately control the gas environment in the gas environment experimental chamber in real time.

[0021] Furthermore, the humidifying device is an ultrasonic humidifier.

[0022] Furthermore, the sensing device includes a temperature sensor, a pressure sensor, a gas concentration sensor and a humidity sensor installed on the inner wall of the gas environment experimental chamber.

[0023] Furthermore, the cabin is made of aluminum alloy;

[0024] The flexible sealing film is a plastic film;

[0025] The heating device is an electric heating plate.

[0026] Furthermore, the gas supply device includes a plurality of gas cylinders, a pressure reducing valve, a stop valve, a one-way valve, a tempering valve, a pressure gauge, a mass flow controller and a gas pipeline;

[0027] Each of the gas cylinders stores a gas required for the friction experiment;

[0028] The gas delivery pipe is connected between the gas cylinder and the gas inlet of the micro-nano bubble generator;

[0029] The pressure reducing valve, the stop valve, the one-way valve, the tempering valve, the pressure gauge and the mass flow controller are sequentially installed on the gas delivery pipe; the pressure reducing valve is used to reduce the initial pressure of the gas flowing out of the gas cylinder; the stop valve, the one-way valve and the tempering valve are used to ensure the stability of the gas passing into the mass flow controller; the pressure gauge is used to monitor the pressure of the initial gas in real time; the mass flow controller is used to control the mass flow of the gas to control the concentration of the gas;

[0030] The control unit is signal-connected to the stop valve, the pressure gauge and the mass flow controller.

[0031] Furthermore, the exhaust device includes an exhaust hood, an audible and visual alarm, a gas sensor, a storm-proof fan and an exhaust pipe;

[0032] The exhaust hood is installed on the top of the gas environment experiment chamber to collect the escaped gas;

[0033] The gas sensor and the sound and light alarm are both installed on the exhaust hood;

[0034] The gas sensor is used to detect gas leakage;

[0035] The sound and light alarm is connected to the gas sensor and is used to make a sound and light alarm after the gas sensor detects a gas leak;

[0036] One end of the exhaust pipe is sealedly connected to the exhaust port of the gas environment test chamber, and the other end is connected to the anti-storm fan;

[0037] The anti-storm fan is connected to the exhaust hood through the exhaust pipe and is used to discharge toxic gas when gas leaks, thereby ensuring the safety of the experiment.

[0038] Furthermore, the micro-nano bubble generator controls the size and concentration of the bubbles by precisely controlling the flow rates of the gas and lubricating oil, and is capable of detecting the particle size and quantity of the bubbles in real time.

[0039] Furthermore, the control unit is a PLC (Programmable Logic Controller). Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0040] 1. The gas-liquid two-phase lubricating oil friction test device of the present invention comprises a gas environment test chamber, a gas supply device and a micro-nano bubble generator. The micro-nano bubble generator installed in the gas environment test chamber can prepare lubricating oil containing micro-nano bubbles and complex gas components. The gas supply device has a plurality of gas mixing and gas type adjustment functions, and can accurately simulate various gas environment conditions in the gas environment test chamber, including different mixing ratios and specific gas concentrations, and can meet the diverse friction test needs, thereby improving the efficiency and applicability of the friction test.

[0041] 2. The gas-liquid two-phase lubricating oil friction test device of the present invention has humidity and temperature adjustment functions. Through the humidifying device and the heating device, it can achieve precise control of the humidity and temperature of the gas environment in the gas environment test chamber, which is particularly important for situations where friction experiments need to be carried out under specific humidity and temperature conditions, ensuring the repeatability and accuracy of the experimental results.

[0042] 3. The gas-liquid two-phase lubricating oil friction experimental device of the present invention has a real-time monitoring function and uses a PLC control unit to achieve real-time monitoring and precise control of the gas environment. PLC not only improves the degree of automation, but also can respond and adjust environmental parameters in time to ensure stability and safety during the experiment.

[0043] 4. The design of the gas-liquid two-phase lubricating oil friction test device of the present invention is diverse and flexible, and can be made into various styles according to different needs, so as to be conveniently combined with various friction testing machines for conducting extensive friction performance tests and related research.

[0044] 5. The gas supply device includes multiple gas cylinders. The composition of the gas environment can be changed by replacing the gas cylinders. The gas flow rate can also be controlled by mass flow rate to simulate the concentration of different gases. Different gas environments can be simulated efficiently and at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the principle of the gas-liquid two-phase lubricating oil friction experimental device of the present invention.

[0046] Among them, 1-micro-nano bubble generator, 2-control unit, 3-friction pair, 4-lubricating oil, 5-cabin, 6-flexible sealing film, 7-humidifying device, 8-heating device, 9-sensing device, 10-friction testing machine, 11-transmission parts, 12-gas cylinder, 13-pressure reducing valve, 14-stop valve, 15-check valve, 16-tempering valve, 17-pressure gauge, 18-mass flow controller, 19-gas pipeline, 20-exhaust hood, 21-sound and light alarm, 22-gas sensor, 23-anti-storm fan, 24-exhaust pipe. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The purpose of the present invention is to fill the gap in the research on the lubricating properties of lubricating oil containing micro-nano bubbles and complex gas components at home and abroad, so as to meet the growing demand of modern engines for lubricating oil performance. By establishing a gas environment experimental chamber, micro-nano bubbles with complex components are introduced into the chamber through a micro-nano bubble generator, and these bubbles merge with the lubricating oil in the experimental chamber, thereby simulating the lubricating oil containing micro-nano bubbles and complex gas components. The micro-nano bubble generator used in the experimental chamber can generate a large number of micro-nano bubbles at a lower energy input, and can accurately control the particle size and number of bubbles by adjusting the flow rate of gas and the flow rate of liquid and perform real-time detection. Therefore, the experimental equipment has the function of adjusting the content of micro-nano bubbles to adapt to a wide range of experimental needs, thereby providing precise control for diverse experimental conditions and requirements. This feature significantly enhances the application potential and practical value of the experimental device in the field of scientific research and engineering experiments. Compared with existing friction experimental equipment, the present invention has significant advantages in the study of the tribological behavior of lubricating oil simulating different bubble concentrations, and also shows the application potential in the study of lubricating oil simulating complex gas components.

[0049] This embodiment provides a gas-liquid two-phase lubricating oil friction experimental device, such as Figure 1 As shown in the structure, the experimental device includes a gas environment experimental chamber, a gas supply device, a micro-nano bubble generator 1, an exhaust device and a control unit 2;

[0050] The gas environment test chamber is used to provide a gas environment and a gas-liquid two-phase lubricant 4 for the friction pair 3; the gas environment test chamber can be placed on the workbench of the friction test machine 10, and provide a sealed working space for the friction pair 3; the friction pair 3 includes two relatively moving test pieces, wherein the friction test machine 10 includes a power output component and a transmission component 11, and the power output component drives the upper test piece to move relative to the lower test piece through the transmission component 11, and applies a vertical load Fz to achieve friction between the two test pieces.

[0051] The micro-nano bubble generator 1 is installed in the gas environment experimental cabin, and is used to generate micro-nano bubbles. It has an air inlet, an oil inlet and an oil outlet; the gas supply device is connected to the air inlet of the micro-nano bubble generator 1, and the gas of the predetermined gas environment is delivered to the micro-nano bubble generator 1. The micro-nano bubble generator 1 adopts the existing micro-nano bubble generator 1, which is not repeated here. The micro-nano bubble generator 1 controls the size and concentration of the bubbles by precisely controlling the flow rate of the gas and the lubricating oil 4, and can detect the particle size and number of the bubbles in real time. The micro-nano bubble generator 1 adopts nano-micron gas-liquid interface technology, combined with the principle of mechanical dispersion and pressure dissolution, and is used to break the gas input by the gas supply device into micro-nano bubbles and then mix them with the lubricating oil 4 to form a gas-liquid two-phase lubricating oil 4.

[0052] The exhaust device is installed on the top of the gas environment experiment chamber. It is used to collect the gas leaked and discharged from the gas environment experiment chamber. After detecting the gas leakage, it will alarm and discharge the toxic gas to ensure the safety of the experiment.

[0053] The control unit 2 is used to control the gas supply device, the gas environment test chamber, the micro-nano bubble generator 1 and the exhaust device, so as to control the friction environment in the gas environment test chamber. The control unit 2 is a PLC (programmable logic controller).

[0054] like Figure 1As shown, in the gas environment experiment chamber, the micro-nano bubble generator 1 adopts a global symmetrical arrangement, that is, a micro-nano bubble generator 1 is arranged on the left and right sides of the gas environment experiment chamber, and the two micro-nano bubble generators 1 are symmetrically arranged. This arrangement optimizes the mixing efficiency of bubbles and lubricating oil 4, and can ensure the uniformity and stability of the distribution of micro-nano bubbles in the lubricating oil 4 to improve the reliability and repeatability of the experiment. This arrangement can also enable researchers to more conveniently observe the content of bubbles in the lubricating oil 4 at various locations in the oil pool in real time. At the same time, a heating device 8 is also arranged on the left and right sides of the gas environment experiment chamber, and the two heating devices 8 are symmetrically arranged so that the temperature is uniform and the heating speed is fast during heating.

[0055] The gas environment test chamber comprises a chamber body 5, a flexible sealing film 6, a humidifying device 7, a heating device 8 and a sensing device 9; the chamber body 5 can be made of aluminum alloy; the flexible sealing film 6 is sealed and installed on the top of the chamber body 5, and a sealed cavity for friction experiment is formed between the chamber body 5 and the flexible sealing film 6; the flexible sealing film 6 can be made of an elastic film such as a plastic film; the transmission member 11 for driving the friction pair 3 to move passes through the flexible sealing film 6 and is sealed, and the center of the flexible sealing film 6 passes through the transmission member 11 for driving the friction pair 3 to move and is sealed, and the flexible sealing film 6 ensures the sealing of the gas environment test chamber while not affecting the friction. The movement of the wiping pair 3; the humidifying device 7 is connected to the gas environment experiment cabin, and is used to adjust the humidity in the gas environment experiment cabin; the humidifying device 7 can be an ultrasonic humidifier placed outside the cabin 5, and is connected to the inside of the cabin 5 through a pipeline; the heating device 8 is fixedly installed in the cabin 5, and is used to adjust the temperature in the gas environment experiment cabin; the heating device 8 can be an electric heating plate; the sensing device 9 is installed in the cabin 5, and is used to monitor the temperature, pressure, humidity and gas concentration of different gas components in the gas environment in the gas environment experiment cabin; the sensing device 9 includes a temperature sensor, a pressure sensor, a gas concentration sensor and a humidity sensor installed on the inner side wall of the gas environment experiment cabin. The temperature sensor is used to detect the temperature of the gas environment in the cabin 5; the pressure sensor is used to detect the pressure of the gas environment in the cabin 5; the gas concentration sensor is used to detect the concentration of different gas components in the gas environment in the cabin 5; the humidity sensor is used to detect the humidity of the gas environment in the cabin 5. The gas supply device is connected to the cabin 5, and is used to provide gas of set composition, pressure and concentration into the cabin 5 to simulate various gas environments; the control unit 2 is connected to the humidifying device 7, the heating device 8 and the sensing device 9, and is used to control the gas supply device, the humidifying device 7 and the heating device 8 according to the detection information of the sensing device 9, so as to monitor and accurately control the gas environment in the gas environment experimental cabin in real time.

[0056] The gas supply device includes a plurality of gas cylinders 12, a pressure reducing valve 13, a stop valve 14, a one-way valve 15, a tempering valve 16, a pressure gauge 17, a mass flow controller 18 and a gas delivery pipe 19; each gas cylinder 12 stores a gas required for the friction experiment, such as hydrogen, chlorine, nitrogen, oxygen, carbon dioxide, hydrogen sulfide, etc.; the gas delivery pipe 19 is connected between the gas cylinder 12 and the gas inlet of the micro-nano bubble generator 1, and is used to transport the gas in the gas cylinder 12 to the micro-nano bubble generator 1; when multiple gases are needed, the gas delivery pipe 19 of each gas cylinder 12 can be installed with a pressure reducing valve 13, a stop valve 14, a one-way valve 15, a tempering valve 16, a pressure gauge 17 and a mass flow controller 18 The control device 18, each gas pipe 19 is merged before connecting to the gas inlet of the micro-nano bubble generator 1; the pressure reducing valve 13, the stop valve 14, the one-way valve 15, the tempering valve 16, the pressure gauge 17 and the mass flow controller 18 are installed in sequence on the gas pipe 19; the pressure reducing valve 13 is used to reduce the initial pressure of the gas flowing out of the gas cylinder 12; the stop valve 14, the one-way valve 15 and the tempering valve 16 are used to ensure the stability of the gas passing into the mass flow controller 18; the pressure gauge 17 is used to monitor the pressure of the initial gas in real time; the mass flow controller 18 is used to control the mass flow rate of the gas to control the concentration of the gas; the control unit 2 is connected to the stop valve 14, the pressure gauge 17 and the mass flow controller 18. In order to simulate different gas environments, the composition of the gas environment can be changed by replacing the gas cylinder 12 storing different gases, and the size of the gas flow rate can be controlled by the mass flow rate to simulate the concentration of different gases.

[0057] The exhaust device includes an exhaust hood 20, an audible and visual alarm 21, a gas sensor 22, an anti-storm fan 23 and an exhaust pipe 24; the exhaust hood 20 is installed on the top of the gas environment experiment chamber to collect the escaped gas; the gas sensor 22 and the audible and visual alarm 21 are both installed on the exhaust hood 20; the gas sensor 22 is used to detect gas leakage; the audible and visual alarm 21 is connected to the gas sensor 22, and is used to make an audible and visual alarm after the gas sensor 22 detects a gas leak; one end of the exhaust pipe 24 is sealed and connected to the exhaust port of the gas environment experiment chamber, and the other end is connected to the anti-storm fan 23; the anti-storm fan 23 is connected to the exhaust hood 20 through the exhaust pipe 24, providing safe ventilation and air circulation, and is used to discharge toxic gases when gas leaks, so as to ensure the safety of the experiment. The exhaust device can also be integrated with an exhaust gas treatment device, which can effectively treat the exhaust gas generated during the experiment, realize the harmless treatment of the experimental gas, and meet the environmental protection requirements.

[0058] The above-mentioned gas-liquid two-phase lubricating oil friction experiment device has a gas environment experiment chamber, a gas supply device and a micro-nano bubble generator 1. Through the gas supply device and the micro-nano bubble generator 1 installed in the gas environment experiment chamber, a lubricating oil 4 containing micro-nano bubbles and complex gas components can be prepared. Various gas environment conditions can be accurately simulated in the gas environment experiment chamber, including different mixing ratios and specific gas concentrations, which can meet the diverse friction experiment needs and improve the efficiency and applicability of the friction experiment.

[0059] The above-mentioned gas-liquid two-phase lubricating oil friction experimental device has a real-time monitoring function, and uses a PLC control unit 2 to realize real-time monitoring and precise control of the gas environment. The PLC not only improves the degree of automation, but also can respond and adjust environmental parameters in time to ensure stability and safety during the experiment.

[0060] The gas supply device includes a plurality of gas cylinders 12. The composition of the gas environment can be changed by replacing the gas cylinders 12. The gas flow rate can also be controlled by mass flow rate to simulate the concentration of different gases. Different gas environments can be simulated efficiently and at low cost.

[0061] The working principle of the above-mentioned gas-liquid two-phase lubricating oil friction test chamber is:

[0062] Before the friction experiment begins, it is necessary to carefully check each device to ensure that they are operating normally and connected well, including checking the sealing status of the heating device 8, humidifying device 7, sensor device 9 and gas environment test chamber; turn on the sensor device 9 and control unit 2 to monitor and record important parameters such as temperature and humidity in the chamber. Subsequently, turn on the gas supply device and micro-nano bubble generator 1 in turn, and start the humidifying device 7 and heating device 8 as needed; these steps need to be adjusted step by step to ensure that the bubble concentration and size in the lubricating oil 4 and the gas environment in the gas environment test chamber meet the requirements and settings of the experiment.

[0063] After the experiment reaches the required predetermined conditions, the formal experimental operation can be started. After the experiment is over, the exhaust port is used to exhaust the air, and the micro-nano bubbles in the lubricating oil 4 are removed by vacuuming, and the waste gas or excrement that may accumulate in the cabin is safely and effectively removed. Through the above steps, the stability of the cabin environment and the accuracy of the experimental data can be guaranteed during the experiment, ensuring that the experiment proceeds smoothly and obtains reliable results.

[0064] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A gas-liquid two-phase lubricating oil friction test device, characterized in that: It includes a gas environment experiment chamber, a gas supply device, a micro-nano bubble generator, an exhaust device and a control unit; The gas environment test chamber is used to provide a gas environment and gas-liquid two-phase lubricating oil for the friction pair; The micro-nano bubble generator is installed in the gas environment experiment chamber; The gas supply device is connected to the gas inlet of the micro-nano bubble generator; The micro-nano bubble generator is used to break the gas input by the gas supply device into micro-nano bubbles and then mix them with lubricating oil to form gas-liquid two-phase lubricating oil; The exhaust device is installed on the top of the gas environment experiment chamber, and is used to collect the gas leaked and exhausted from the gas environment experiment chamber, alarm after detecting gas leakage, and exhaust the toxic gas to ensure the safety of the experiment; The control unit is used to control the gas supply device, the gas environment experiment chamber, the micro-nano bubble generator and the exhaust device, so as to control the friction environment in the gas environment experiment chamber.

2. The gas-liquid two-phase lubricating oil friction test device according to claim 1, characterized in that: The gas environment experiment chamber comprises a chamber body, a flexible sealing film, a humidifying device, a heating device and a sensing device; The flexible sealing film is sealingly mounted on the top of the cabin body, and a sealing cavity for friction experiment is formed between the cabin body and the flexible sealing film; A transmission member for driving the friction pair to move passes through the flexible sealing film and seals; The humidifying device is in communication with the gas environment test chamber and is used to adjust the humidity in the gas environment test chamber; The heating device is fixedly installed in the cabin and is used to adjust the temperature in the gas environment experiment cabin; The sensor device is installed in the cabin and is used to monitor the temperature, pressure, humidity and gas concentration of different gas components of the gas environment in the gas environment experiment cabin; The gas supply device is in communication with the cabin and is used to provide gas of set composition, pressure and concentration into the cabin to simulate various gas environments; The control unit is connected to the humidifying device, the heating device and the sensing device, and is used to control the gas supply device, the humidifying device and the heating device according to the detection information of the sensing device, so as to monitor and accurately control the gas environment in the gas environment experimental chamber in real time.

3. The gas-liquid two-phase lubricating oil friction test device as claimed in claim 2, characterized in that: The humidifying device is an ultrasonic humidifier.

4. The gas-liquid two-phase lubricating oil friction test device as claimed in claim 2, characterized in that: The sensing device comprises a temperature sensor, a pressure sensor, a gas concentration sensor and a humidity sensor which are installed on the inner side wall of the gas environment experiment chamber.

5. The gas-liquid two-phase lubricating oil friction test device as claimed in claim 2, characterized in that: The cabin is made of aluminum alloy; The flexible sealing film is a plastic film; The heating device is an electric heating plate.

6. The gas-liquid two-phase lubricating oil friction test device as claimed in claim 2, characterized in that: The gas supply device includes a plurality of gas cylinders, a pressure reducing valve, a stop valve, a check valve, a tempering valve, a pressure gauge, a mass flow controller and a gas transmission pipe; Each of the gas cylinders stores a gas required for the friction experiment; The gas delivery pipe is connected between the gas cylinder and the gas inlet of the micro-nano bubble generator; The pressure reducing valve, the stop valve, the one-way valve, the tempering valve, the pressure gauge and the mass flow controller are sequentially installed on the gas delivery pipe; the pressure reducing valve is used to reduce the initial pressure of the gas flowing out of the gas cylinder; the stop valve, the one-way valve and the tempering valve are used to ensure the stability of the gas passing into the mass flow controller; the pressure gauge is used to monitor the pressure of the initial gas in real time; the mass flow controller is used to control the mass flow of the gas to control the concentration of the gas; The control unit is signal-connected to the stop valve, the pressure gauge and the mass flow controller.

7. The gas-liquid two-phase lubricating oil friction test device according to any one of claims 1 to 6, characterized in that: The exhaust device includes an exhaust hood, an audible and visual alarm, a gas sensor, a storm-proof fan and an exhaust pipe; The exhaust hood is installed on the top of the gas environment experiment chamber to collect the escaped gas; The gas sensor and the sound and light alarm are both installed on the exhaust hood; The gas sensor is used to detect gas leakage; The sound and light alarm is connected to the gas sensor and is used to make a sound and light alarm after the gas sensor detects a gas leak; One end of the exhaust pipe is sealedly connected to the exhaust port of the gas environment test chamber, and the other end is connected to the anti-storm fan; The anti-storm fan is connected to the exhaust hood through the exhaust pipe and is used to discharge toxic gas when gas leaks, thereby ensuring the safety of the experiment.

8. The gas-liquid two-phase lubricating oil friction test device according to any one of claims 1 to 6, characterized in that: The micro-nano bubble generator controls the size and concentration of bubbles by precisely controlling the flow rates of gas and lubricating oil, and can detect the particle size and quantity of the bubbles in real time.

9. The gas-liquid two-phase lubricating oil friction test device according to any one of claims 1 to 6, characterized in that: The control unit is a PLC.

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