Lubricating oil abrasive particle sensor performance detection test bed for simulating working conditions of aircraft engine

Abstract

The utility model relates to the technical field of aero-engine lubricating oil system detection, in particular to a lubricating oil abrasive particle sensor performance detection test bed for simulating the working condition of an aircraft engine, which comprises a lubricating oil circulating system, an abrasive particle adding system, an environment control system and a measurement and control interaction system, the lubricating oil circulating system comprises a lubricating oil tank, a circulating pump, an energy accumulator, a lubricating oil pipeline, an oil filter and a radiator, the abrasive particle adding system comprises an abrasive particle oil tank and a metering pump, and the environment control system comprises an environment control fuming cupboard, an air filter valve, a pipeline heater and an oil gas recovery assembly. Through cooperative work of the lubricating oil circulating system, the abrasive particle adding system, the environment control system and the measurement and control interaction system, the test bench can truly simulate the lubricating oil environment in the aircraft engine, including key parameters of temperature, pressure, flow velocity and abrasive particle content, so that the accuracy and reliability of a test result are ensured.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for lubricating oil systems of aero-engines, specifically a test bench for testing the performance of lubricating oil abrasive sensors under simulated aircraft engine operating conditions. Background Technology

[0002] In mechanical systems, especially complex power units in the aerospace field, abrasive particles generated by friction during equipment operation are a key indicator for assessing their health status. The quantity and type of abrasive particles directly reflect the degree of wear on the equipment. Excessive abrasive particles not only reduce equipment operating efficiency but may also pose a serious threat to system safety. Therefore, real-time monitoring of the abrasive particle content in lubricating oil is of great significance for early warning of equipment failures, reducing unplanned downtime, and lowering maintenance costs.

[0003] Given the importance of abrasive particle monitoring, developing a test bench capable of accurately evaluating the performance of lubricating oil abrasive particle sensors is crucial. This test bench must be able to simulate the actual operating conditions of an aircraft engine, including but not limited to parameters such as temperature, pressure, and flow rate, to comprehensively test the sensor's response characteristics and accuracy under different operating environments. Furthermore, the test bench should integrate a high-efficiency data acquisition system capable of recording and analyzing the sensor's output data in real time, providing a reliable basis for sensor performance evaluation.

[0004] Currently, lubricating oil abrasive particle sensor performance testing systems on the market typically employ the following technical solution: the sensor is connected to a data processing module via a sensor cable, and the data processing module is then connected to a host computer and a power system via communication and power cables, respectively. In actual operation, the operator simulates the flow of abrasive particles through the sensor by pulling a specially designed fixture containing a specific concentration of ferromagnetic and non-ferromagnetic particles. By observing the monitoring channel count displayed on the host computer and comparing it with the actual number of pulls, the sensor's detection rate is calculated, which serves as the standard for judging whether the sensor's performance is qualified.

[0005] However, existing technical solutions have the following shortcomings: First, the realism of the simulated operating conditions is limited, making it difficult to fully reproduce the complex environment of actual aircraft engine operation; second, the data processing and analysis methods are relatively simple, lacking advanced intelligent and automated analysis capabilities; and third, there is insufficient testing of the long-term stability and durability of sensors under different operating conditions. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a test bench for testing the performance of a lubricating oil abrasive sensor under simulated aircraft engine operating conditions.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: A performance testing bench for a lubricating oil abrasive sensor simulating aircraft engine operating conditions, comprising a lubricating oil circulation system, an abrasive addition system, an environmental control system, and a measurement and control interaction system. The lubricating oil circulation system includes an oil tank, a circulation pump, an accumulator, lubricating oil pipes, an oil filter, and a radiator. The abrasive addition system includes an abrasive oil tank and a metering pump. The environmental control system includes an environmental control fume hood, an air filter valve, a pipe heater, and an oil vapor recovery assembly. The measurement and control interaction system includes a level sensor, a flow sensor, a pressure sensor, a temperature sensor, a lubricating oil abrasive sensor, a debris sensor, and a display and control platform. The circulation pump is connected to the oil tank and the accumulator via an oil pipe. The accumulator is connected to the lubricating oil pipe via an oil pipe. A vent valve is provided at the rear end of the lubricating oil pipe, and the vent valve is connected to the oil vapor recovery assembly. An oil filter and a radiator are installed at the rear end of the lubricating oil pipe. The device includes a radiator connected to the lubricating oil tank via an oil pipe, a wear-resistant oil tank connected to the lubricating oil pipeline via a delivery pipe, a metering pump installed on the delivery pipeline, a pipeline heater installed at the input end of the lubricating oil pipeline, the lubricating oil pipeline and the pipeline heater installed in an environmental control fume hood, the environmental control fume hood having a ventilation opening, an air filter valve installed on the ventilation opening, a level sensor installed in the lubricating oil tank, a flow sensor installed at the input end of the lubricating oil pipeline, a pressure sensor and a temperature sensor installed on the lubricating oil pipeline and located behind the pipeline heater, a wear-resistant oil sensor and a debris sensor all installed on the lubricating oil pipeline, with the wear-resistant oil sensor located behind the pressure sensor and the debris sensor located behind the wear-resistant oil sensor, and the level sensor, flow sensor, pressure sensor, temperature sensor, wear-resistant oil sensor and debris sensor all electrically connected to the display control platform.

[0010] Preferably, the oil tank is equipped with an oil tank heater, a temperature sensor, and a flow rate sensor, and the oil tank heater, temperature sensor, and flow rate sensor are electrically connected to the display and control platform.

[0011] More preferably, the lubricating oil tank is provided with a liquid level observation window.

[0012] Preferably, the oil and gas recovery assembly includes a condensate oil pipe and a heat dissipation coil, wherein the heat dissipation coil is connected to the vent valve and the condensate oil pipe.

[0013] Preferably, it also includes an outdoor chiller, which is installed on an environmental control fume hood and is connected to a radiator and a vent.

[0014] Further preferably, the system also includes a motor controller and a motor, wherein the motor controller is electrically connected to the display control platform, the motor is electrically connected to the motor controller, and the output end of the motor is connected to the circulating pump.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a test bench for simulating the operating conditions of aircraft engine lubricating oil abrasive particle sensors, which has the following beneficial effects:

[0017] Realistic simulation of working conditions: Through the coordinated operation of the lubricating oil circulation system, abrasive particle addition system, environmental control system and measurement and control interaction system, this test bench can realistically simulate the lubricating oil environment inside an aircraft engine, including key parameters such as temperature, pressure, flow rate and abrasive particle content, thereby ensuring the accuracy and reliability of test results.

[0018] Improved testing accuracy: The test bench employs advanced sensors and measurement and control technologies, enabling real-time monitoring and recording of abrasive particle content in lubricating oil and sensor performance data, effectively improving testing accuracy and efficiency. Furthermore, by optimizing workflows and adopting preferred technical solutions, errors and interference are further reduced.

[0019] Multifunctional Integration: This test bench integrates multiple functions, including lubricating oil circulation, abrasive particle addition, environmental control, and measurement and control interaction, which can meet different testing needs. In addition, the test bench is also equipped with sampling pipelines and intelligent detection equipment, which facilitates the analysis of chemical components and metal elements in lubricating oil.

[0020] Easy to operate and maintain: The test bench is designed with ease of operation and maintenance in mind. It utilizes an integrated industrial control computer and computer software interface for human-machine interaction, making operation simpler and more intuitive. Furthermore, the oil filter features a detachable structure for easy cleaning, replacement, and abrasive collection.

[0021] In conclusion, this test bench for simulating aircraft engine operating conditions and lubricating oil wear sensor performance testing has broad application prospects and important practical value in equipment wear monitoring and fault prevention in the aviation, aerospace and other fields. Attached Figure Description

[0022] Figure 1 This is a functional schematic diagram of the lubrication system test bench of this utility model;

[0023] Figure 2 This is a schematic diagram of the main components of the lubrication system test bench of this utility model;

[0024] Figure 3 This is a diagram illustrating the implementation of the lubricating oil circulation function of this utility model;

[0025] Figure 4This is a schematic diagram illustrating the heating function of this utility model;

[0026] Figure 5 This is a schematic diagram of the measurement and control nodes of the test bench of this utility model; Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 This utility model discloses a performance testing bench for a lubricating oil abrasive sensor simulating aircraft engine operating conditions. It includes a lubricating oil circulation system, an abrasive addition system, an environmental control system, and a measurement and control interaction system. The lubricating oil circulation system includes an oil tank, a circulation pump, an accumulator, lubricating oil pipelines, an oil filter, and a radiator. The abrasive addition system includes an abrasive oil tank and a metering pump. The environmental control system includes an environmental control fume hood, an air filter valve, a pipeline heater, and an oil vapor recovery assembly. The measurement and control interaction system includes a level sensor, a flow sensor, a pressure sensor, a temperature sensor, a lubricating oil abrasive sensor, a debris sensor, and a display and control platform. The circulation pump is connected to the oil tank and the accumulator via an oil pipe. The accumulator is connected to the lubricating oil pipeline via an oil pipe. A vent valve is located at the rear end of the lubricating oil pipeline and is connected to the oil vapor recovery assembly. An oil filter and a radiator are installed at the rear end of the lubricating oil pipeline. The radiator is connected to the oil filter... The pipe is connected to the lubricating oil tank, and the abrasive oil tank is connected to the lubricating oil pipeline through the delivery pipe. The metering pump is installed on the delivery pipeline. The pipeline heater is installed at the input end of the lubricating oil pipeline. The lubricating oil pipeline and the pipeline heater are installed in an environmental control fume hood. The environmental control fume hood is provided with a vent. The air filter valve is installed on the vent. The liquid level sensor is installed in the lubricating oil tank. The flow sensor is installed at the input end of the lubricating oil pipeline. The pressure sensor and temperature sensor are installed on the lubricating oil pipeline and are located behind the pipeline heater. The lubricating oil abrasive sensor and the debris sensor are all installed on the lubricating oil pipeline. The lubricating oil abrasive sensor is located behind the pressure sensor. The debris sensor is located behind the lubricating oil abrasive sensor. The liquid level sensor, flow sensor, pressure sensor, temperature sensor, lubricating oil abrasive sensor, and debris sensor are all electrically connected to the display control platform.

[0029] This simulated aircraft engine operating condition lubricating oil abrasive sensor performance testing bench tests the performance of lubricating oil abrasive sensors by simulating the lubricating oil environment under actual operating conditions. The test bench mainly includes a lubricating oil circulation system, an abrasive particle addition system, an environmental control system, and a measurement and control interaction system. These systems work together to ensure that the test bench can accurately reflect potential hidden dangers inside the engine.

[0030] Working principles of various preferred technical solutions

[0031] Lubricating oil circulation system

[0032] Oil tank: Stores lubricating oil, and the oil level is monitored in real time by a level sensor.

[0033] Circulation pump: draws lubricating oil from the lubricating oil tank and sends it into the lubricating oil pipeline through the oil pipe.

[0034] Accumulator: Stabilizes lubricating oil pressure and prevents pressure fluctuations.

[0035] Lubricating oil pipelines: connect various components to form a closed lubricating oil circulation path.

[0036] Oil filter: Filters impurities in lubricating oil and keeps it clean.

[0037] Radiator: Cools the high-temperature lubricating oil to ensure the temperature stability of the lubricating oil circulation system.

[0038] Workflow:

[0039] The circulating pump draws lubricating oil from the oil tank and stabilizes the pressure through the accumulator.

[0040] The lubricating oil is heated by a pipeline heater before entering the lubricating oil pipeline.

[0041] The lubricating oil is detected by a lubricating oil abrasive sensor and a debris sensor.

[0042] The lubricating oil is filtered through an oil filter to remove impurities before entering the radiator for cooling.

[0043] The cooled lubricating oil flows back to the oil tank, completing one cycle.

[0044] Abrasive feeding system

[0045] Abrasive oil tank: Stores abrasive particles and is connected to the lubricating oil pipeline through a delivery pipe.

[0046] Metering pump: It quantitatively controls the amount of abrasive particles added and transports the abrasive particles from the abrasive oil tank to the lubricating oil pipeline.

[0047] Workflow:

[0048] The metering pump draws abrasive particles from the abrasive oil tank according to the set parameters.

[0049] Abrasive particles are quantitatively added to the lubricating oil pipeline through a delivery pipe.

[0050] Abrasive particles flow along with the lubricating oil and are detected by the lubricating oil abrasive sensor and the debris sensor.

[0051] Environmental control system

[0052] Environmental control fume hood: Located in the high-temperature oil area, it absorbs a large amount of heating heat and some oil vapor.

[0053] Air filter valve: Installed on the vent to filter the exhaust air.

[0054] Pipe heater: Installed at the inlet end of the lubricating oil pipeline to heat the lubricating oil.

[0055] Oil and gas recovery components: including vent valves, cooling coils, and condensers, used for high-temperature oil and gas separation and recovery.

[0056] Workflow:

[0057] The pipeline heater heats the lubricating oil to the required temperature.

[0058] After passing through the debris sensor, the high-temperature lubricating oil undergoes high-temperature oil-gas separation via the venting valve.

[0059] High-temperature oil and gas are cooled by the cooling coils and then enter the condenser for condensation and recovery.

[0060] The condensed oil is periodically collected, regenerated, and recycled.

[0061] The environmental control fume hood absorbs heat and oil vapor from the high-temperature oil area, and then discharges them outdoors after being filtered by the air filter valve.

[0062] Measurement and Control Interaction System

[0063] Liquid level sensor: installed inside the lubricating oil tank to monitor the lubricating oil level in real time.

[0064] Flow sensor: installed at the inlet of the lubricating oil pipeline to monitor the lubricating oil flow rate in real time.

[0065] Pressure sensor: Installed on the lubricating oil pipeline, located behind the pipeline heater, to monitor the lubricating oil pressure in real time.

[0066] Temperature sensor: Installed on the lubricating oil pipeline, located behind the pipeline heater, to monitor the lubricating oil temperature in real time.

[0067] Oil abrasive sensor: Located on the oil pipeline, behind the pressure sensor, it detects abrasive particles in the oil.

[0068] Debris sensor: Located behind the lubricating oil abrasive sensor, it detects debris in the lubricating oil.

[0069] Display and control platform: Using an integrated industrial computer, various parameters of the test bench are measured and recorded in real time, and human-computer interaction is performed through a computer software interface.

[0070] Workflow:

[0071] Each sensor monitors parameters such as lubricating oil level, flow rate, pressure, temperature, abrasive particles, and debris in real time.

[0072] Sensor data is displayed and recorded in real time through a display control platform.

[0073] The metering pump, circulation pump, and heating components are quantitatively controlled and output through an integrated industrial control computer.

[0074] Human-computer interaction is facilitated through computer software interfaces, making operation and monitoring convenient.

[0075] Functional Implementation Analysis

[0076] Lubricating oil circulation

[0077] Lubricating oil is drawn from the oil tank by a circulating pump, and after the pressure is stabilized by an accumulator, it enters the lubricating oil pipeline.

[0078] The lubricating oil is heated by a pipeline heater and then flows through a lubricating oil abrasive sensor and a debris sensor for detection.

[0079] The lubricating oil passes through an oil filter to remove impurities, then enters a radiator for cooling, and finally flows back to the oil tank, completing one cycle.

[0080] Simulated loading

[0081] Oil heating: For temperatures below 70 degrees Celsius, an oil tank heater is used for heating; for temperatures above 70 degrees Celsius, a pipeline heater is used for heating.

[0082] Flow velocity simulation: The vibration effect on the simulated flow velocity is quantitatively controlled by the motor driving the circulating pump.

[0083] Gas simulation: This is achieved through an external gas source. A flow meter can be installed at the input end of the lubricating oil pipeline. The external gas source is connected to the lubricating oil pipeline via the flow meter. The lubricating oil flow rate and gas flow rate are adjusted according to the required oil-gas ratio to simulate the oil-gas ratio under actual engine operating conditions.

[0084] Measurement and Control Interaction

[0085] The integrated industrial computer is used to measure and record various parameters of the test bench in real time, such as pressure, flow rate, temperature, and liquid level, through the display control platform.

[0086] Real-time data measurement and recording are performed on standard sensors and comparative abrasive sensors.

[0087] Human-computer interaction is facilitated through computer software interfaces, making operation and monitoring convenient.

[0088] Environmental control

[0089] A negative pressure fume hood is installed in the high-temperature oil area to absorb a large amount of heating heat and some oil vapor, which is then filtered through an air filter valve and discharged outdoors.

[0090] A cooling unit is installed on the pipeline, which includes an outdoor unit, to quickly dissipate heat to the outside.

[0091] To address the high-temperature oil and gas generated during heating, a high-temperature oil and gas separation process is implemented downstream of the dust sensor after pipeline heating. Automated venting is achieved via a venting valve, and an integrated electronically controlled flow switch on the cooling coil prevents oil discharge. The oil is condensed in a condenser, and the high-temperature oil and gas are recovered, stored, and periodically collected, regenerated, and recycled.

[0092] A sampling pipeline can be installed at the rear end of the oil filter in the lubricating oil pipeline. Oil samples are taken through the sampling pipeline and tested using a smart microscope, oil spectrometer, and X-ray fluorescence spectrometer to analyze the chemical composition and metal elements in the lubricating oil. The oil filter has a detachable structure, which facilitates cleaning and replacement of the oil filter. It also makes it easy to collect the abrasive particles filtered by the oil filter and observe the morphology and particle size of the abrasive particles using a smart microscope.

[0093] In this technical solution, all electrical components can be connected to external AC power.

[0094] In this technical solution, the lubricating oil tank can be a conventional oil tank used in the field of aero-engines, the accumulator can be a conventional oil circuit accumulator, the radiator can be a conventional oil circuit radiator, the outdoor refrigeration unit can be a conventional industrial refrigeration unit, the pipeline heater can be a conventional oil circuit pipeline heater, and the display and control platform can be a conventional PLC editor controller.

[0095] Based on the above working principle and technical solution, the test bench of this utility model can realistically simulate the actual working conditions of an aircraft engine, perform performance testing on the lubricating oil wear sensor, and improve the fault detection capability of the lubricating oil system and the operational safety of the engine.

[0096] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test bench for testing the performance of a lubricating oil abrasive sensor under simulated aircraft engine operating conditions, characterized in that, The system includes a lubricating oil circulation system, an abrasive particle dosing system, an environmental control system, and a measurement and control interaction system. The lubricating oil circulation system includes an oil tank, a circulation pump, an accumulator, lubricating oil pipelines, an oil filter, and a radiator. The abrasive particle dosing system includes an abrasive particle tank and a metering pump. The environmental control system includes an environmental control fume hood, an air filter valve, a pipeline heater, and an oil vapor recovery assembly. The measurement and control interaction system includes a level sensor, a flow sensor, a pressure sensor, a temperature sensor, a lubricating oil abrasive particle sensor, a debris sensor, and a display and control platform. The circulation pump is connected to the oil tank and the accumulator via oil pipes. The accumulator is connected to the lubricating oil pipelines via oil pipes. A vent valve is installed at the rear end of the lubricating oil pipelines, and the vent valve is connected to the oil vapor recovery assembly. An oil filter and a radiator are installed at the rear end of the lubricating oil pipelines. The radiator is connected to the oil tank via oil pipes. The abrasive particle tank is connected to the lubricating oil tank via a transmission line. The delivery pipe is connected to the lubricating oil pipeline, and the metering pump is installed on the delivery pipeline. The pipeline heater is installed at the input end of the lubricating oil pipeline. The lubricating oil pipeline and the pipeline heater are installed in an environmental control fume hood. The environmental control fume hood is provided with a vent. The air filter valve is installed on the vent. The liquid level sensor is installed in the lubricating oil tank. The flow sensor is installed at the input end of the lubricating oil pipeline. The pressure sensor and temperature sensor are installed on the lubricating oil pipeline and are located behind the pipeline heater. The lubricating oil abrasive sensor and the debris sensor are all installed on the lubricating oil pipeline. The lubricating oil abrasive sensor is located behind the pressure sensor. The debris sensor is located behind the lubricating oil abrasive sensor. The liquid level sensor, flow sensor, pressure sensor, temperature sensor, lubricating oil abrasive sensor, and debris sensor are all electrically connected to the display control platform.

2. The test bench for simulating aircraft engine operating conditions lubricating oil abrasive particle sensor performance testing according to claim 1, characterized in that, The lubricating oil tank is equipped with an oil tank heater, a temperature sensor, and a flow rate sensor, which are electrically connected to the display and control platform.

3. The test bench for simulating aircraft engine operating conditions lubricating oil abrasive particle sensor performance testing according to claim 2, characterized in that, The lubricating oil tank is equipped with a liquid level observation window.

4. The test bench for simulating aircraft engine operating conditions lubricating oil abrasive particle sensor performance testing according to claim 3, characterized in that, The oil and gas recovery assembly includes a condensate oil pipe and a heat dissipation coil, which is connected to the vent valve and the condensate oil pipe.

5. The test bench for simulating aircraft engine operating conditions lubricating oil abrasive particle sensor performance testing according to claim 4, characterized in that, It also includes an outdoor refrigeration unit, which is installed on an environmental control fume hood and is connected to a radiator and a vent.

6. The test bench for simulating aircraft engine operating conditions lubricating oil abrasive particle sensor performance testing according to claim 5, characterized in that, It also includes a motor controller and a motor, wherein the motor controller is electrically connected to the display control platform, the motor is electrically connected to the motor controller, and the output end of the motor is connected to the circulating pump.

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