Lubricating oil sensor oil level calibration test device

Abstract

This utility model discloses a lubricating oil sensor level calibration test device, comprising: a calibration unit including a calibration oil tank, a level gauge mounted on the calibration oil tank, a temperature detection unit mounted on the calibration oil tank, and multiple mounting interfaces for mounting the lubricating oil sensor; an oil supply unit connected to the calibration oil tank for providing lubricating oil at a constant temperature to the calibration oil tank; and a detection unit connected to the lubricating oil sensor for acquiring the output signal of the lubricating oil sensor. By using the oil supply unit to provide lubricating oil heated to a set temperature to the calibration oil tank, and using the temperature detection unit and the level gauge to acquire the lubricating oil temperature and level value in the calibration oil tank respectively, the device calibrates the measured value of the lubricating oil sensor at a specific temperature. The calibration process is quick, simple to operate, and highly accurate.

Description

Technical Field

[0001] This utility model belongs to the field of testing technology, specifically relating to a lubricating oil sensor oil level calibration test device. Background Technology

[0002] For a long time, monitoring the lubricating oil level in aircraft engines has been difficult due to various factors. Previously, the oil level could only be determined by checking the dipstick in the oil tank after the engine was shut down. However, with the continuous development of the aviation industry, oil sensors are now typically installed in the engine oil tank to enable online monitoring of the lubricating oil level.

[0003] Currently, lubricating oil sensors primarily employ capacitive measurement principles. However, lubricating oil typically lacks a dielectric constant parameter, and there's no curve showing how the dielectric constant changes with temperature. Therefore, unlike fuel measurement, classical formulas cannot be used for measurement; only practical measurements are possible. During engine operation, lubricating oil operates at high temperatures. To ensure the accuracy of online lubricating oil detection, lubricating oil sensors must undergo high-temperature calibration tests before delivery to users, calibrating their output signal parameters under various temperature and fluid level conditions.

[0004] When conducting high-temperature calibration tests on lubricating oil sensors, the common practice is to fill a metal fixture with lubricating oil and then conduct the test in a high-low temperature chamber. This testing method is time-consuming and complex to operate. Utility Model Content

[0005] The purpose of this invention is to provide a lubricating oil sensor oil level calibration test device to solve the problems of long time consumption and complicated operation in the high temperature calibration test of lubricating oil sensor.

[0006] This utility model is achieved through the following technical solution:

[0007] The lubricating oil sensor oil level calibration test device includes:

[0008] The calibration unit includes a calibration oil tank, on which a level gauge is installed, a temperature detection unit is installed, and multiple mounting interfaces for installing lubricating oil sensors are provided.

[0009] The oil supply unit is connected to the calibration oil tank and is used to provide the calibration oil tank with lubricating oil at a constant temperature.

[0010] A detection unit is connected to a lubricating oil sensor and is used to acquire the output signal of the lubricating oil sensor.

[0011] In some embodiments of this utility model, a return oil tank connected to the calibration oil tank is also included.

[0012] In some embodiments of this utility model, a return oil pump is provided between the return oil tank and the oil supply unit.

[0013] In some embodiments of this utility model, the oil supply unit includes an oil supply tank and an induction heating coil disposed outside the oil supply tank, and a protective shell is disposed outside the induction heating coil.

[0014] In some embodiments of this utility model, the level gauge is a communicating vessel connected to a calibration oil tank, the communicating vessel is provided with a scale, and the communicating vessel is a tube made of transparent material.

[0015] In some embodiments of this utility model, a metal support is provided around the communicating vessel, and the metal support has a C-shaped cross-section.

[0016] In some embodiments of this utility model, the calibration tank is covered with an insulation layer.

[0017] In some embodiments of this utility model, a first flow meter is provided on the oil supply pipeline between the oil supply unit and the calibration oil tank, and the first flow meter is connected to the detection unit.

[0018] In some embodiments of this utility model, a second flow meter is provided on the return oil pipeline between the return oil tank and the calibration oil tank, and the second flow meter is connected to the detection unit.

[0019] In some embodiments of this utility model, a reference mounting plate is provided on the calibration oil tank, and multiple mounting interfaces are arranged side by side on the reference mounting plate. The mounting interface includes a positioning sleeve, and a mating groove is provided on the inner wall of the positioning sleeve in the vertical direction. The lubricating oil sensor forms a mating with the inner wall of the positioning sleeve and the mating groove respectively.

[0020] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0021] This invention uses an oil supply unit to provide lubricating oil heated to a set temperature to the calibration oil tank, and uses a temperature detection unit and a level gauge to obtain the lubricating oil temperature and level value in the calibration oil tank, respectively, so as to calibrate the measurement value of the lubricating oil sensor at a specific temperature. The calibration time is short, the operation is simple, and the calibration accuracy is high. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of the lubricating oil sensor oil level calibration test device according to an embodiment of this utility model.

[0024] Figure 2 This is a schematic diagram of the liquid level gauge structure according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic cross-sectional view of the level gauge in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the oil supply unit structure in an embodiment of the present invention.

[0027] Figure 5 This is a top view of the reference mounting plate structure of an embodiment of this utility model.

[0028] Figure 6 This is a front view of the reference mounting plate structure of an embodiment of this utility model.

[0029] in:

[0030] 1. Calibration oil tank; 2. Lubricating oil sensor; 3. Detection unit; 4. First flow meter; 5. Oil supply unit; 51. Oil supply tank; 52. Induction heating coil; 53. Protective shell; 6. Return oil pump; 7. Return oil tank; 8. Second flow meter; 9. Level gauge; 91. Communicating vessel; 92. Metal bracket; 10. Temperature detection unit; 11. Oil supply pipeline; 12. Insulation layer; 13. Reference mounting plate; 14. Mounting interface; 15. Positioning sleeve; 16. Mating groove; 17. Level. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0032] Using existing calibration test methods, due to the large amount of lubricating oil in the test fixture, the lubricating oil needs to be heated and kept at a certain temperature for a long time. To ensure that the lubricating oil has reached the specified temperature and remains stable, it generally needs to be kept at that temperature for at least 6 hours. Due to space limitations in the high and low temperature chamber, it is not possible to add or drain oil directly inside the chamber. The test fixture must be removed from the chamber before adding or draining oil, followed by temperature maintenance. This process is complex and wastes a significant amount of manpower and resources.

[0033] Reference Figure 1 In an embodiment of this utility model, the lubricating oil sensor oil level calibration test device includes:

[0034] The calibration unit includes a calibration oil tank 1, a level gauge 9 installed on the calibration oil tank 1, a temperature detection unit 10 installed on the calibration oil tank 1, and multiple mounting interfaces for installing lubricating oil sensors 2 on the calibration oil tank 1.

[0035] Oil supply unit 5 is connected to calibration oil tank 1 and is used to provide constant temperature lubricating oil to the calibration oil tank;

[0036] The detection unit 3 is connected to the lubricating oil sensor 2 and is used to acquire the output signal of the lubricating oil sensor.

[0037] The temperature detection unit 10 uses a thermometer or temperature sensor to detect the temperature of the lubricating oil.

[0038] In some embodiments, the calibration oil tank 1 is connected to the return oil tank 7, and the return oil tank 7 is connected to the oil supply unit 5 via the return oil pump 6. After the calibration test is completed, the lubricating oil in the calibration oil tank can be released into the return oil tank and pumped from the return oil tank to the oil supply unit, thereby realizing the recycling of the lubricating oil.

[0039] Reference Figure 4 The oil supply unit 5 includes an oil supply tank 51 and an induction heating coil 52 disposed outside the oil supply tank. A protective shell 53 is disposed outside the induction heating coil 52. The induction heating coil heats the lubricating oil in the oil supply tank to the required temperature. A temperature detection unit is installed on the oil supply tank to detect the temperature inside the tank. The induction heating coil is heated according to the temperature, realizing closed-loop feedback. Using an induction heating coil to heat the lubricating oil results in fast heating speed and short time required to reach the set temperature, reducing the calibration time.

[0040] A reference mounting plate is installed on calibration tank 1, referring to... Figure 5 and Figure 6 Multiple mounting interfaces 14 are arranged side-by-side on the reference mounting plate 13. Each mounting interface 14 includes a positioning sleeve 15. A mating groove 16 is vertically formed on the inner wall of the positioning sleeve 15. The lubricating oil sensor mates with both the inner wall of the positioning sleeve and the mating groove, ensuring the verticality of the lubricating oil sensor when mounted on the reference mounting plate. A level 17 is installed on the reference mounting plate to ensure its levelness, thereby ensuring the verticality of the lubricating oil sensor mounted on each mounting interface relative to the liquid surface.

[0041] The positioning sleeve 15 on the reference mounting plate 13 is integrally formed on the reference mounting plate to ensure the positioning accuracy of the mounting interface.

[0042] Reference Figure 2 and Figure 3The level gauge 9 uses a communicating vessel 91 that connects to the calibration tank. The communicating vessel 91 is a tube made of transparent material and has a scale. The level gauge with the communicating vessel structure allows the level height of the calibration tank to be read directly from the scale, avoiding the influence of cumulative errors generated during the calibration process of other level measuring devices on the calibration results.

[0043] The inner diameter of the communicating vessel should not exceed 5mm to reduce lubricating oil consumption and minimize the impact on liquid level measurement and lubricating oil temperature.

[0044] A metal bracket 92 is provided on the outside of the communicating vessel 91. The metal bracket 92 has a C-shaped cross section. The metal bracket 92 is used to protect the communicating vessel and will not affect the reading of liquid level data.

[0045] The calibration oil tank 1 is covered with an insulation layer 12 to ensure the stability of the oil temperature during the calibration measurement process.

[0046] A first flow meter 4 is installed on the oil supply pipeline between the oil supply unit 5 and the calibration oil tank 1, and the first flow meter 4 is connected to the detection unit 3. A second flow meter 8 is installed on the oil return pipeline between the oil return tank 7 and the calibration oil tank 1, and the second flow meter 8 is connected to the detection unit 3.

[0047] After the lubricating oil in the supply oil tank is heated to the set temperature and stabilized, the oil supply valve on the oil supply pipeline 11 between the supply oil tank and the calibration oil tank is opened. The high-temperature lubricating oil is transported to the calibration oil tank by utilizing the height difference between the supply oil tank and the calibration oil tank. An insulation layer 12 is installed on the oil supply pipeline 11 to reduce the temperature loss of the lubricating oil when it travels from the supply oil tank to the calibration oil tank.

[0048] Record the current temperature and liquid level values, obtain the output signal of the lubricating oil sensor through the detection unit, obtain the liquid level value measured by the lubricating oil sensor, compare the liquid level value measured by the lubricating oil sensor with the liquid level value measured by the level gauge, and calibrate the lubricating oil sensor.

[0049] After completing the calibration of a liquid level, completely release the lubricating oil in the calibration tank into the return tank.

[0050] During the process of lubricating oil delivery and release, the flow rate of lubricating oil is obtained through the first flow meter and the second flow meter, and the liquid level value is calculated. The calculated liquid level value is compared with the liquid level value measured by the lubricating oil sensor and the liquid level value measured by the liquid level gauge to achieve supplementary calibration of the lubricating oil sensor.

[0051] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A lubricating oil sensor oil level calibration test device, characterized in that, include: The calibration unit includes a calibration oil tank, on which a level gauge is installed, a temperature detection unit is installed, and multiple mounting interfaces for installing lubricating oil sensors are provided. The oil supply unit is connected to the calibration oil tank and is used to provide the calibration oil tank with lubricating oil at a constant temperature. A detection unit is connected to a lubricating oil sensor and is used to acquire the output signal of the lubricating oil sensor.

2. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, It also includes the return tank connected to the calibration tank.

3. The lubricating oil sensor oil level calibration test device according to claim 2, characterized in that, A return oil pump is installed between the return oil tank and the oil supply unit.

4. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, The oil supply unit includes an oil supply tank and an induction heating coil disposed outside the oil supply tank, with a protective shell disposed outside the induction heating coil.

5. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, The level gauge is a communicating vessel connected to the calibration tank. The communicating vessel is provided with a scale and is a tube made of transparent material.

6. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, A metal support is provided around the communicating vessel, and the metal support has a C-shaped cross-section.

7. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, The calibration tank is covered with an insulation layer.

8. The lubricating oil sensor oil level calibration test device according to claim 2, characterized in that, A first flow meter is installed on the oil supply pipeline between the oil supply unit and the calibration oil tank, and the first flow meter is connected to the detection unit.

9. The lubricating oil sensor oil level calibration test device according to claim 8, characterized in that, A second flow meter is installed on the return oil pipeline between the return oil tank and the calibration oil tank, and the second flow meter is connected to the detection unit.

10. The lubricating oil sensor oil level calibration test device according to claim 1, characterized in that, A reference mounting plate is set on the calibration oil tank. Multiple mounting interfaces are arranged side by side on the reference mounting plate. The mounting interfaces include positioning sleeves. The inner wall of the positioning sleeves is provided with mating grooves in the vertical direction. The lubricating oil sensor is mated with the inner wall of the positioning sleeves and the mating grooves respectively.

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