A test platform

Abstract

The present invention discloses a test platform. The test platform includes an oil injection device, an atomization device, an oil mist storage device, a delivery device, and a control device. The oil injection device delivers mineral oil into the atomization device. The atomization device is configured to atomize the mineral oil into oil mist. The oil mist storage device is disposed downstream of the atomization device and is fluidically connected to the atomization device. The oil mist from the atomization device enters the oil mist storage device. The oil mist storage device is provided with multiple detection ports for detecting the concentration of the oil mist in the oil mist storage device. The delivery device is fluidically connected to the atomization device and the oil mist storage device, respectively, to deliver the oil mist in the atomization device to the oil mist storage device. The control device is configured to control the amount of mineral oil and / or oil mist. The test platform according to the present invention simulates the actual oil mist environment and oil mist in a state similar to the actual environment, as well as simulates the extraction of oil mist for measurement, and is simple and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engines, and more particularly to a test platform. Background Art

[0002] One of the key technical indicators for determining diesel engine safety during operation is whether the oil mist concentration inside the crankcase meets standards. A diesel engine malfunction can cause the oil mist concentration inside the crankcase to rise rapidly and reach ignition point, potentially causing a crankcase explosion and serious consequences for personnel safety and economic well-being. Oil mist detectors can monitor the oil mist concentration inside the crankcase in real time and provide an alarm signal to shut down the engine if the oil mist concentration exceeds a set value. However, ensuring accurate simulation of the oil mist concentration inside the crankcase during field testing remains a difficult issue.

[0003] Therefore, a test platform is needed to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, according to one aspect of the present invention, a test platform is provided, comprising:

[0006] an oil injection device, wherein mineral oil is stored in the oil injection device;

[0007] an atomizing device, the atomizing device being in fluid communication with the oil injection device, the oil injection device delivering the mineral oil into the atomizing device, the atomizing device being configured to atomize the mineral oil into oil mist;

[0008] an oil mist storage device, the oil mist storage device being disposed downstream of the atomizing device and in fluid communication with the atomizing device, the oil mist from the atomizing device entering the oil mist storage device, the oil mist storage device being provided with a plurality of detection ports for detecting the concentration of the oil mist in the oil mist storage device;

[0009] a conveying device, the conveying device being in fluid communication with the atomizing device and the oil mist storage device, respectively, so as to convey the oil mist in the atomizing device to the oil mist storage device; and

[0010] A control device is configured to control the amount of the mineral oil and / or the amount of the oil mist.

[0011] The test platform according to the present invention can effectively simulate the environment inside the crankcase, convert liquid mineral oil into gaseous oil mist, keep the oil mist generated within a certain temperature range, simulate the oil mist existence environment in the actual environment and the oil mist in an approximate actual state, and simulate the method of extracting oil mist for measurement. It is simple and convenient to operate, can generate oil mist that meets the test requirements of the oil mist detector, and effectively solves the problems of oil mist detector precision calibration, accuracy verification and factory testing difficulties.

[0012] Optionally, the atomizing device is provided with a heating pipe for atomizing the mineral oil.

[0013] Optionally, the control device is electrically connected to the atomization device to control the heating time and temperature of the heating pipe.

[0014] Optionally, the control device includes:

[0015] a controller, the controller being electrically connected to the oil injection device, the atomization device, and the delivery device respectively; and

[0016] The acquisition module is electrically connected to the controller and is used to collect data of the mineral oil and feed the data back to the controller.

[0017] Optionally, the oil injection device includes:

[0018] A motor, wherein an output shaft of the motor is provided with an external thread;

[0019] a movable mechanism comprising a movable baffle provided with an internal thread engaged with the external thread so that the movable baffle is movable in an axial direction of the output shaft; and

[0020] The oil injection syringe comprises an oil chamber storing the mineral oil, the oil chamber is in fluid communication with the atomizing device, the movable portion of the oil injection syringe is connected to the movable baffle, and the movable portion changes the volume of the oil chamber as the movable baffle moves.

[0021] Optionally, the movable mechanism further includes two connected fixed baffles, the two fixed baffles are arranged opposite to each other along the axial direction, the two fixed baffles each include a through hole, the output shaft extends through the two through holes, and the movable baffle is arranged between the two fixed baffles.

[0022] Optionally, a pressure sensor is provided downstream of the oil injection syringe to detect the pressure of the mineral oil discharged from the oil injection syringe.

[0023] The atomizing device is provided with a temperature sensor to detect the temperature inside the atomizing device.

[0024] The acquisition module is electrically connected to the pressure sensor and the temperature sensor, and the acquisition module obtains the pressure data and the temperature data and feeds the data back to the controller.

[0025] The controller is configured to control the rotational speed of the output shaft according to the data of the pressure and / or the temperature.

[0026] Optionally, the conveying device includes a fan, which is fluidically connected to the atomizing device and the oil mist storage device respectively, and the fan is configured to convey the oil mist in the atomizing device to the oil mist storage device, and the controller is electrically connected to the fan to control the rotation speed of the fan.

[0027] Optionally, the conveying device further includes a butterfly valve and a vortex flowmeter, both of which are arranged between the fan and the oil mist storage device, and the vortex flowmeter is arranged upstream of the butterfly valve, and both of which are electrically connected to the controller.

[0028] The controller is configured to control the opening of the butterfly valve according to the flow rate of the oil mist collected by the vortex flowmeter.

[0029] Optionally, a rotating component is provided in the oil mist storage device to disperse the oil mist in the oil mist storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the device and principle of the present invention. In the drawings,

[0031] Figure 1 A schematic diagram of a control method of a test platform according to a preferred embodiment of the present invention;

[0032] Figure 2 A structural layout diagram of a test platform according to a preferred embodiment of the present invention; and

[0033] Figure 3 The figure is a system flow chart of a test platform according to a preferred embodiment of the present invention.

[0034] Description of Reference Numerals

[0035] 1: Controller 2: Oil injection device

[0036] 3: Atomization device 4: Oil mist storage device

[0037] 5: Display instrument 6: Acquisition module

[0038] 7: Temperature sensor 8: Pressure sensor

[0039] 9: First fixed baffle 10: Oil injection syringe

[0040] 11: Moving baffle 12: Second fixed baffle

[0041] 13: Output shaft 14: First fixing rod

[0042] 15: Second fixed rod 16: Motor

[0043] 17: Fan 18: Vortex flowmeter

[0044] 19: First detection port 20: Second detection port

[0045] 21: The third detection port 22: Oil mist calibration port

[0046] 23: Oil filling line 24: Oil mist line

[0047] 25: Butterfly valve 26: Heating pipe DETAILED DESCRIPTION

[0048] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0049] To provide a thorough understanding of the present invention, a detailed structure will be provided in the following description to illustrate the present invention. Obviously, the practice of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other embodiments and should not be construed as being limited to the embodiments set forth herein.

[0050] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. The singular forms "a", "an" and "said / the" are also intended to include the plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "back", "left", "right" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0051] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0052] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings illustrate representative embodiments of the present invention and do not limit the present invention.

[0053] The present invention provides a test platform of a preferred embodiment to accurately simulate the environment inside a crankcase.

[0054] Specifically, if Figure 2 As shown, the test platform includes an oil injection device 2, an atomization device 3, an oil mist storage device 4, a delivery device, and a control device. The oil injection device 2 stores mineral oil. The mineral oil can be SAE 40 single-grade viscosity mineral oil to meet the requirements of crankcase lubricating oil, thereby ensuring accurate simulation.

[0055] Specifically, the oil injection device 2 includes a motor 16, a movable mechanism and an oil injection syringe 10, and the motor 16 may include an output shaft 13. The motor 16 can be constructed as a stepping motor to convert electrical pulses into discrete mechanical motions, and has excellent data control characteristics. The movable mechanism includes a movable baffle 11, and the movable baffle 11 is provided with a threaded hole, and the threaded hole is provided with an internal thread. The output shaft 13 of the motor 16 is provided with an external thread, and the external thread is engaged with the internal thread. The movable baffle 11 can be connected vertically to the output shaft 13. In this way, the movable baffle 11 is movable along the axial direction of the output shaft 13. When the motor 16 is running, the output shaft 13 of the motor 16 rotates, and the movable baffle 11 can move along the axial direction of the output shaft 13 as the output shaft 13 rotates.

[0056] For ease of distinction, in this embodiment, when the output shaft 13 rotates forward, for example, when the output shaft 13 rotates clockwise, the movable baffle 11 moves along the axial direction of the output shaft 13 in a direction away from the main body of the motor 16. When the output shaft 13 rotates reversely, for example, when the output shaft 13 rotates counterclockwise, the movable baffle 11 moves along the axial direction of the output shaft 13 in a direction toward the main body of the motor 16.

[0057] Of course, it is understandable that the spiral direction of the external thread and the internal thread can be changed. When the output shaft 13 rotates forward, for example, when the output shaft 13 rotates in a clockwise direction, the movable baffle 11 can also move along the axial direction of the output shaft 13 toward the main body of the motor 16; when the output shaft 13 reverses, for example, when the output shaft 13 rotates in a counterclockwise direction, the movable baffle 11 can also move along the axial direction of the output shaft 13 toward the direction away from the main body of the motor 16. This embodiment does not intend to limit this.

[0058] The oil injection syringe 10 may include an oil chamber and a movable portion. The oil chamber may store mineral oil and may be in fluid communication with the atomizing device 3. An oil chamber outlet may be provided on the outer wall of the oil injection syringe 10, through which the mineral oil in the oil chamber may enter the atomizing device 3.

[0059] The movable portion can move to change the volume of the oil chamber. The movable portion can be connected to the movable baffle 11 and can move as the movable baffle 11 moves along the axial direction of the output shaft 13, thereby changing the volume of the oil chamber. For example, the movable baffle 11 can move away from the main body of the motor 16, driving the movable portion toward the oil chamber outlet, thereby discharging the mineral oil in the oil chamber into the atomizing device 3 and reducing the volume of the oil chamber.

[0060] In order to ensure the stability of the output shaft 13 during rotation and the movable baffle 11 during movement, the movable mechanism also includes two fixed baffles, which can be connected. Specifically, the movable mechanism also includes a first fixed rod 14 and a second fixed rod 15, and the first fixed rod 14 and the second fixed rod 15 are both parallel to the output shaft 13. The first fixed baffle 9 and the second fixed baffle 12 are arranged opposite each other along the axial direction of the output shaft 13. The first fixed rod 14 and the second fixed rod 15 pass through the first fixed baffle 9 and the second fixed baffle 12 respectively to connect the first fixed baffle 9 and the second fixed baffle 12 together. The first fixed rod 14 and the second fixed rod 15 are arranged opposite each other along the width direction of the first fixed baffle 9. The width direction of the first fixed baffle 9 can be parallel to the width direction of the second fixed baffle 12, and the height direction of the first fixed baffle 9 can be parallel to the width direction of the second fixed baffle 12.

[0061] The first fixed baffle 9 and the second fixed baffle 12 both include through holes, and the through holes of the first fixed baffle 9 and the through holes of the second fixed baffle 12 are arranged relative to each other along the axial direction of the output shaft 13. The output shaft 13 can extend through the through holes of the first fixed baffle 9 and the through holes of the second fixed baffle 12. Preferably, the through holes of the first fixed baffle 9 and the through holes of the second fixed baffle 12 are both light holes. When the output shaft 13 rotates, the first fixed baffle 9 and the second fixed baffle 12 do not move relative to the output shaft 13 along the axial direction of the output shaft 13. The movable baffle 11 is arranged between the first fixed baffle 9 and the second fixed baffle 12. In this way, the distance between the first fixed baffle 9 and the second fixed baffle 12 limits the displacement between the movable baffles 11, preventing the movable baffle 11 from falling off the output shaft 13.

[0062] The atomizing device 3 can be in fluid communication with the oiling device 2 via the oiling line 23, and the oiling device 2 can deliver mineral oil into the atomizing device 3. Preferably, the movable baffle 11 can push the movable portion in the oiling syringe 10 to discharge the mineral oil into the oiling line 23 and then into the atomizing device 3.

[0063] The atomizing device 3 is configured to atomize mineral oil into oil mist. Preferably, a heating pipe 26 is provided within the atomizing device 3 for atomizing the mineral oil. The heating pipe 26 can heat the oil in a temperature range of 0-800°C, and both the heating time and temperature of the heating pipe 26 are controllable. The atomizing device 3 is also internally provided with a digital display module and a safety circuit. The temperature sensor 7 and the digital display module can be used together to visually observe the current temperature. The safety circuit has over-temperature tripping and over-temperature alarm functions.

[0064] Before the mineral oil is delivered to the atomizer 3, the heating pipe 26 in the atomizer 3 is activated to heat the interior of the atomizer 3 to 600°C. After the temperature in the atomizer 3 reaches 600°C, the oil injection device 2 is activated to deliver the mineral oil into the atomizer 3. This allows the mineral oil to be atomized in the atomizer 3 to form an oil mist. Preferably, the atomizer 3 can atomize the mineral oil to produce an oil mist with a diameter of less than 5 μm, meeting the oil mist detector test requirements.

[0065] The oil mist storage device 4 can be disposed downstream of the atomizing device 3 and in fluid communication with the atomizing device 3, so that the oil mist from the atomizing device 3 can enter the oil mist storage device 4. The oil mist storage device 4 can be in fluid communication with the oil mist outlet of the atomizing device 3, so that the oil mist can enter the oil mist storage device 4 through the oil mist outlet.

[0066] Specifically, to ensure that the oil mist can smoothly enter the oil mist storage device 4, a delivery device can be disposed between the atomizing device 3 and the oil mist storage device 4 and be in fluid communication with the atomizing device 3 and the oil mist storage device 4, respectively. The delivery device can exert a force on the oil mist in the atomizing device 3 to deliver the oil mist in the atomizing device 3 to the oil mist storage device 4.

[0067] Optionally, the conveying device may include a fan 17, which may be in fluid communication with the atomizing device 3 and the oil mist storage device 4. The fan 17 is used to regulate the flow of oil mist into the oil mist storage device 4, thereby preventing the accumulation of oil mist in the atomizing device 3, which could result in equipment damage and potential safety hazards such as explosions. The fan 17 may be an exhaust fan. The fan 17 is configured to convey the oil mist from the atomizing device 3 to the oil mist storage device 4. The state of the oil mist in the oil mist storage device 4 can be maintained consistent with that in the atomizing device 3, thereby ensuring the accuracy of the oil mist concentration measurement in the oil mist storage device 4.

[0068] Specifically, the oil mist storage device 4 can be constructed as a cubic container with a capacity of 1 cubic meter. The oil mist storage device 4 can be equipped with multiple detection ports to detect the concentration of the oil mist in the oil mist storage device 4 and ensure detection accuracy. For example, the oil mist storage device 4 can be equipped with three detection ports. Specifically, the oil mist storage device 4 can be equipped with a first detection port 19, a second detection port 20, and a third detection port 21. The first detection port 19, the second detection port 20, and the third detection port 21 can be spaced apart along the direction of oil mist transport. Each of the three detection ports can extract oil mist from the oil mist storage device 4 for measurement. Each detection port can be equipped with an oil mist detector. The three oil mist detectors can measure simultaneously to ensure detection accuracy and to determine whether the measured data from the three oil mist detectors are consistent.

[0069] Preferably, the multiple detection ports also include an oil mist calibration port 22, through which oil mist can be extracted to obtain the actual oil mist concentration, and then the specific gravity method is used to compare the data displayed by the oil mist detector to determine the difference between the actual oil mist concentration and the oil mist detector. The oil mist detector with deviated data is reset to ensure the accuracy of the oil mist detector, thereby achieving calibration of the oil mist detector and ensuring the accuracy of subsequent oil mist detector measurements of the actual oil mist in the crankcase.

[0070] To prevent oil mist from settling in the oil mist storage device, a rotating member is provided in the oil mist storage device 4 to disperse the oil mist in the oil mist storage device 4. Preferably, the rotating member can be configured as a fan. When the oil mist enters the oil mist storage device 4 and begins to operate, the rotating member can stir the oil mist so that the oil mist is evenly dispersed within the oil mist container, preventing the oil mist from settling too quickly and allowing the oil mist to be fully dispersed into the oil mist storage device 4, thereby preventing the oil mist detector from affecting its experimental data.

[0071] In order to ensure that the amount of oil mist and / or mineral oil meets the data required for the test, the test platform also includes a control device, which is constructed to be able to control the amount of mineral oil and / or oil mist to ensure the simulation of the oil mist in the actual environment and the accuracy of the oil mist detector's measurement.

[0072] The test platform according to the present invention can effectively simulate the environment inside the crankcase, convert liquid mineral oil into gaseous oil mist, keep the oil mist generated within a certain temperature range, simulate the oil mist existence environment in the actual environment and the oil mist in an approximate actual state, and simulate the method of extracting oil mist for measurement. It is simple and convenient to operate, can generate oil mist that meets the test requirements of the oil mist detector, and effectively solves the problems of oil mist detector precision calibration, accuracy verification and factory testing difficulties.

[0073] The control device can be electrically connected to the atomizing device 3 to control the heating time and temperature of the heating pipe 26. In this way, human-computer interaction of the test platform can be realized, the temperature in the atomizing device 3 can be prevented from being too high or too low, and the temperature in the atomizing device 3 can be maintained in a stable temperature range to ensure the generation of oil mist.

[0074] Furthermore, the control device may include a controller 1 and an acquisition module 6. The controller 1 may be electrically connected to the oil injection device 2, the atomization device 3, and the delivery device, respectively. The controller 1 is provided with operation buttons, status indicators, and an LCD screen, enabling better human-computer interaction. The controller 1 displays temperature, pressure, and speed signals, and displays alarms for overtemperature and overpressure. It is equipped with motor forward, reverse, acceleration, deceleration, start, and stop buttons to accurately control the oil injection device 2, the atomization device 3, and the delivery device. The controller 1 may utilize STMicroelectronics' high-speed ARM chip, the STM32F103VCT6, as the control chip, responsible for communication with each submodule, data transmission, and control signals. A relay is provided to provide necessary alarm output points.

[0075] Combine Figure 1As shown, the controller 1 can be electrically connected to the atomizing device 3 to control the heating time and temperature of the heating pipe 26. The controller 1 can also be electrically connected to the fan 17. The controller 1 can send a control signal to the fan 17 to control the rotation speed of the fan 17, thereby adjusting the flow rate of the oil mist entering the oil mist storage device 4. The controller 1 can also be electrically connected to the motor 16 to control the rotation speed of the output shaft 13 of the motor 16, thereby controlling the output speed and pressure of the mineral oil from the oil injection syringe 10, and thus controlling the amount of mineral oil output.

[0076] The motor 16 may also be connected to an encoder, which may feed back the rotational speed of the motor 16 to the controller 1. The controller 1 may control the subsequent rotational speed of the fan 17 and the heating time and temperature of the heating pipe 26 based on the rotational speed data of the output shaft 13 of the motor 16 fed back by the encoder. Of course, the fan 17 may also feed back the rotational speed data of the fan 17 to the controller 1. The controller 1 may control the rotational speed of the output shaft 13 and the temperature in the atomizing device 3 based on the rotational speed data fed back by the fan 17.

[0077] More specifically, the acquisition module 6 can be electrically connected to the controller 1. The acquisition module 6 can collect the temperature in the atomization device 3 and feed the temperature data back to the controller 1, thereby enabling the controller 1 to further control the heating time and temperature of the heating pipe 26 in the atomization device 3. Preferably, the atomization device 3 can be provided with a temperature sensor 7 that can detect the temperature inside the atomization device 3. The acquisition module 6 can be electrically connected to the temperature sensor 7 to feed the acquired temperature data back to the controller 1. The controller 1 can further control the heating time and temperature of the heating pipe 26 in the atomization device 3 based on the temperature data.

[0078] For example, when the temperature sensor 7 detects that the temperature in the atomizing device 3 is lower than the system set value, the system set value may be 600° C. The acquisition module 6 may feed back the data collected by the temperature sensor 7 to the controller 1. When the temperature detected by the temperature sensor 7 is 550° C., the controller 1 may increase the temperature of the heating pipe 26, thereby causing the temperature in the atomizing device 3 to reach 600° C.

[0079] When the temperature sensor 7 detects that the temperature in the atomizing device 3 is higher than the system set value, the system set value may be 600° C. The acquisition module 6 may feed back the data collected by the temperature sensor 7 to the controller 1. When the temperature detected by the temperature sensor 7 is 650° C., the controller 1 may reduce the temperature of the heating pipe 26, thereby causing the temperature in the atomizing device 3 to reach 600° C.

[0080] The acquisition module 6 can collect mineral oil data and feed it back to the controller 1. The controller 1 can then control the speed of the output shaft 13 of the motor 16 based on the mineral oil data, thereby further controlling the pressure of the mineral oil. This can improve the accuracy of the actual environment and state of the simulated oil mist.

[0081] Preferably, a pressure sensor 8 may be provided on the oil injection line 23. The pressure sensor 8 may be positioned downstream of the oil injection syringe 10 to detect the pressure of the mineral oil discharged from the oil injection syringe 10. The acquisition module 6 is electrically connected to the pressure sensor 8 to feed the acquired mineral oil pressure data back to the controller 1. The controller 1 can further control the speed of the output shaft 13 of the motor 16 based on the pressure data, thereby further adjusting the mineral oil pressure.

[0082] Of course, the controller 1 can also control the rotation speed of the output shaft 13 according to the temperature data in the atomizing device 3. When the particle size requirement of the oil mist in the atomizing device 3 is adjusted, the controller 1 can adjust the heating time and temperature of the heating pipe 26 in the atomizing device 3, and can also adjust the rotation speed of the output shaft 13, thereby adjusting the pressure of the mineral oil discharged from the oil injection syringe 10.

[0083] Preferably, the controller 1 can also be electrically connected to an external power supply so that the controller 1 can power the motor 16 and / or the controller 1 can power the fan 17 to save energy. Of course, the motor 16 and the fan 17 can also be directly electrically connected to the external power supply to prevent the controller 1 from being powered off and affecting the operation of the fan 17 and the motor 16.

[0084] Of course, the acquisition module 6 can also be electrically connected to the display instrument 5 to display the pressure data of the mineral oil detected by the pressure sensor 8 and the temperature data detected by the temperature sensor 7, so as to facilitate the operator to operate the controller 1.

[0085] Furthermore, the delivery device also includes an oil mist line 24, which connects the atomizing device and the oil mist storage device. The delivery device also includes a butterfly valve 25 and a vortex flowmeter 18. The butterfly valve 25 is disposed on the oil mist line 24, downstream of the fan 17, and is in fluid communication with both the fan 17 and the oil mist storage device 4. The butterfly valve 25 precisely controls the amount of oil mist entering the oil mist storage device 4, thereby controlling the amount of oil mist entering the oil mist storage device 4. Preferably, the controller 1 is electrically connected to the butterfly valve 25 to control the opening of the butterfly valve 25.

[0086] A vortex flowmeter 18 is installed on the oil mist line 24, upstream of the butterfly valve 25, and in fluid communication with the fan 17 and the butterfly valve 25, respectively. The vortex flowmeter 18 measures the flow rate of the oil mist discharged from the fan 17. The controller 1 is in fluid communication with the vortex flowmeter 18, which feeds the collected oil mist flow rate back to the controller 1. The controller 1 controls the opening of the butterfly valve 25 based on the oil mist flow rate collected by the vortex flowmeter 18, thereby implementing PID closed-loop control. This ensures the accuracy of the flow rate and concentration of the oil mist entering the oil mist storage device 4.

[0087] The operator can activate the atomizer 3 by pressing the start button on the controller 1 of the motor 16, causing the heating pipe 26 in the atomizer 3 to operate. The temperature inside the atomizer 3 is fed back by a temperature sensor 7 located within the atomizer 3. When the temperature inside the atomizer 3 reaches 600°C, the controller automatically activates the motor 16, causing the output shaft 13 of the motor 16 to rotate. This causes the movable baffle 11 to push the movable portion of the oiling syringe 10 to move, allowing the mineral oil in the oiling syringe 10 to enter the heated atomizer 3.

[0088] The acquisition module 6 collects the pressure of the mineral oil detected by the pressure sensor 8. The controller 1 further controls the rotation speed of the output shaft 13 of the motor 16 based on the pressure data fed back by the acquisition module 6 and the speed data of the motor 16, and adjusts the amount of mineral oil discharged from the oil injection syringe 10.

[0089] The mineral oil is atomized in the atomizing device 3 to form oil mist. The controller 1 controls the rotation speed of the fan 17 and adjusts the opening of the butterfly valve 25 through the 4-20mA signal, thereby further controlling the flow of the oil mist into the oil mist storage device 4.

[0090] The test platform according to the present invention can effectively simulate the environment inside the crankcase, convert liquid mineral oil into gaseous oil mist, keep the oil mist generated within a certain temperature range, simulate the oil mist existence environment in the actual environment and the oil mist in an approximate actual state, and simulate the method of extracting oil mist for measurement. It has a good human-computer interaction interface, is simple and convenient to operate, can generate oil mist that meets the test requirements of the oil mist detector, and effectively solves the problems of oil mist detector precision calibration, accuracy verification and factory testing difficulties. It can also perform functional verification tests required by relevant specifications and product exit tests.

[0091] like Figure 3 As shown, the present invention also provides a test method for a test platform, the test method comprising the following steps:

[0092] Step S101: start the atomizing device and adjust the temperature in the atomizing device to 600°C.

[0093] Controller 1 provides a 220V control power supply. A start button on controller 1 activates atomizer 3. Temperature sensor 7 within atomizer 3 measures the internal temperature. Acquisition module 6 collects the temperature data from temperature sensor 7 and feeds the collected temperature data back to controller 1. The internal temperature of atomizer 3 reaches 600°C. The temperature within atomizer 3 can be adjusted.

[0094] Step S102: Start the motor.

[0095] Controller 1 automatically activates motor 16 based on the internal temperature of atomizer 3, as fed back by acquisition module 6. Motor 16 begins rotating at an initial speed. Output shaft 13 of motor 16 rotates, driving movable baffle 11 to move, allowing the mineral oil in oiling syringe 10 to be discharged into oiling line 23.

[0096] Step S103: Compare the pressure of the mineral oil with a predetermined pressure.

[0097] An oil pressure sensor 8 is positioned upstream of the atomizing device 3. The pressure sensor 8 can detect the pressure of the mineral oil in the oil filling line 23. The acquisition module 6 can collect data on the pressure of the mineral oil from the pressure sensor 8 and compare the pressure of the mineral oil detected by the pressure sensor 8 with a predetermined pressure. In this embodiment, the "predetermined pressure" refers to the pressure of the mineral oil that matches the temperature in the atomizing device 3. Mineral oil at the predetermined pressure can be atomized into an oil mist of a predetermined particle size in the high-temperature atomizing device 3. This does not necessarily mean that the "predetermined pressure" is a fixed value.

[0098] Step S104: When the detected pressure of the mineral oil is equal to the predetermined pressure, the rotational speed of the output shaft remains unchanged.

[0099] The controller 1 compares the detected pressure data with the predetermined pressure data. When the detected pressure is equal to the predetermined pressure, the rotation speed of the output shaft 13 of the motor 16 remains unchanged, and the pressure of the mineral oil output by the oiling syringe 10 remains unchanged.

[0100] Step S105: When the detected pressure of the mineral oil is greater than the predetermined pressure, the rotation speed of the output shaft is reduced.

[0101] The controller 1 compares the detected pressure data with the predetermined pressure data. When the detected pressure is greater than the predetermined pressure, the rotation speed of the output shaft 13 of the motor 16 is reduced through the PID control algorithm to reduce the pressure of the mineral oil output by the oil injection syringe 10, so that the pressure of the mineral oil is equal to the predetermined pressure.

[0102] Step S106: When the detected pressure of the mineral oil is lower than the predetermined pressure, the rotation speed of the output shaft is increased.

[0103] The controller 1 compares the detected pressure data with the predetermined pressure data. When the detected pressure is lower than the predetermined pressure, the rotation speed of the output shaft 13 of the motor 16 is increased through the PID control algorithm to increase the pressure of the mineral oil output by the oil injection syringe 10, thereby making the pressure of the mineral oil equal to the predetermined pressure.

[0104] Repeat steps S105 and S106 until the pressure of the mineral oil reaches the predetermined pressure through the PID algorithm, and then determine that the mineral oil with the predetermined pressure enters the atomizing device 3 .

[0105] Step S107: The mineral oil is atomized to form oil mist.

[0106] In the atomizing device 3, the mineral oil is heated at high temperature and atomized to form oil mist. Preferably, the mineral oil forms oil mist with a particle size of less than 5 μm in the atomizing device 3.

[0107] Step S108: Start the fan.

[0108] The controller 1 can automatically start the fan 17 and can set the rotation speed of the fan 17 to control the rotation of the fan 17. The rotation speed of the fan 17 can be obtained based on the oil mist atomization rate in the atomization device 3 and the safety threshold test.

[0109] Step S109: adjusting the opening of the butterfly valve according to the flow rate of the oil mist.

[0110] Downstream of the fan 17, a butterfly valve 25 and a vortex flowmeter 18 are installed. Both are electrically connected to the controller 1. The vortex flowmeter 18, located upstream of the butterfly valve 25, detects the flow rate of the oil mist discharged from the fan 17 and feeds this data back to the controller 1. The controller 1 compares this data with the predetermined flow rate and, using a PID control algorithm, controls the opening of the butterfly valve 25, thereby maintaining the predetermined flow rate.

[0111] Butterfly valve 25 is in fluid communication with oil mist storage device 4, delivering the regulated oil mist thereto. Oil mist storage device 4 is equipped with multiple detection ports to monitor the concentration of the oil mist therein. This allows for precision calibration, accuracy verification, and factory testing of the oil mist detector, providing 5μm oil mist particles that meet relevant specifications.

[0112] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the field of the invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the invention. Terms such as "part" and "component" appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediate component. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0113] The present invention has been described through the above embodiments, but it should be understood that the above embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test platform, characterized in that: include: An oil injection device, wherein mineral oil is stored in the oil injection device, and the oil injection device comprises: A motor, wherein an output shaft of the motor is provided with an external thread; a movable mechanism comprising a movable baffle provided with an internal thread engaged with the external thread so that the movable baffle is movable in an axial direction of the output shaft; and an oil injection syringe, the oil injection syringe comprising an oil chamber storing the mineral oil, the oil chamber being in fluid communication with the atomizing device, a movable portion of the oil injection syringe being connected to the movable baffle, the movable portion changing the volume of the oil chamber as the movable baffle moves; an atomizing device, the atomizing device being in fluid communication with the oil injection device, the oil injection device delivering the mineral oil into the atomizing device, the atomizing device being configured to atomize the mineral oil into oil mist; an oil mist storage device, the oil mist storage device being disposed downstream of the atomizing device and in fluid communication with the atomizing device, the oil mist from the atomizing device entering the oil mist storage device, the oil mist storage device being provided with a plurality of detection ports for detecting the concentration of the oil mist in the oil mist storage device; a conveying device, the conveying device comprising a fan, a butterfly valve, and a vortex flowmeter, the conveying device being in fluid communication with the atomizing device and the oil mist storage device, respectively, to convey the oil mist in the atomizing device to the oil mist storage device; and The control device includes a controller, the controller is electrically connected to the oil injection device, the atomization device and the delivery device respectively, and the control device is configured to control the amount of the mineral oil and the amount of the oil mist.

2. The test platform according to claim 1, characterized in that: The atomizing device is provided with a heating pipe for atomizing the mineral oil.

3. The test platform according to claim 2, characterized in that: The control device is electrically connected to the atomizing device to control the heating time and temperature of the heating pipe.

4. The test platform according to claim 1, characterized in that: The control device comprises: The acquisition module is electrically connected to the controller and is used to collect data of the mineral oil and feed the data back to the controller.

5. The test platform according to claim 1, characterized in that: The movable mechanism further includes two connected fixed baffles, which are arranged opposite to each other along the axial direction. The two fixed baffles each include a through hole, the output shaft extends through the two through holes, and the movable baffle is arranged between the two fixed baffles.

6. The test platform according to claim 4, characterized in that: A pressure sensor is provided downstream of the oil injection syringe to detect the pressure of the mineral oil discharged from the oil injection syringe. The atomizing device is provided with a temperature sensor to detect the temperature inside the atomizing device. The acquisition module is electrically connected to the pressure sensor and the temperature sensor, and the acquisition module obtains the pressure data and the temperature data and feeds the data back to the controller. The controller is configured to control the rotational speed of the output shaft according to the data of the pressure and / or the temperature.

7. The test platform according to claim 1, characterized in that: The fan is fluidically connected to the atomizing device and the oil mist storage device respectively. The fan is configured to transport the oil mist in the atomizing device to the oil mist storage device. The controller is electrically connected to the fan to control the rotation speed of the fan.

8. The test platform according to claim 1, characterized in that: The butterfly valve and the vortex flowmeter are both arranged between the fan and the oil mist storage device, the vortex flowmeter is arranged upstream of the butterfly valve, and the vortex flowmeter and the butterfly valve are both electrically connected to the controller. The controller is configured to control the opening of the butterfly valve according to the flow rate of the oil mist collected by the vortex flowmeter.

9. The test platform according to claim 1, characterized in that: The oil mist storage device is provided with a rotating member to disperse the oil mist in the oil mist storage device.

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