Reverse thrust hydraulic test system

Abstract

The utility model relates to the field of aero-engine testing, and discloses a reverse thrust hydraulic testing system which comprises a reverse thrust hydraulic testing platform, a hydraulic servo system, a measurement and control system and a main control system. The reverse thrust hydraulic test platform comprises two left racks and two right racks, the left racks comprise a rack 1 and a rack 2, the right racks comprise a rack 3 and a rack 4, the rack 1, the rack 2, the rack 3 and the rack 4 are sequentially arranged from left to right, the rack 1 is a main loading rack, and the rack 2, the rack 3 and the rack 4 are all follow-up racks. The utility model has the following advantages and effects: by constructing an environment-load-control-diagnosis four-dimensional coupling test system, the limitation of the traditional test technology is broken through, and dynamic load simulation, automatic test process and full life cycle health assessment are realized.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine testing technology, and in particular to a reverse thrust hydraulic testing system. Background Technology

[0002] Traditional hydraulic testing systems often employ single-parameter static loading methods, such as simulating loads through constant pressure or displacement. This makes it difficult to reproduce the dynamic, multi-dimensional load environment faced by aero-engine thrust reversers in actual flight (such as nonlinear load fluctuations caused by changes in airspeed and angle of attack). Furthermore, existing systems are insufficient in terms of testing coverage (the entire lifecycle of design verification, production testing, and maintenance support) and intelligent diagnostic capabilities, resulting in low testing efficiency and poor adaptability.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic thrust countermeasure testing system to solve the above-mentioned problems.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a reverse thrust hydraulic testing system, comprising:

[0006] Hydraulic test platform for thrust reversal, hydraulic servo system, measurement and control system and main control system;

[0007] The thrust-reverse hydraulic test platform includes two left platforms and two right platforms. The left platforms include platform 1 and platform 2, and the right platforms include platform 3 and platform 4. Platforms 1, 2, 3 and 4 are arranged sequentially from left to right. Platform 1 is the main loading platform, and platforms 2, 3 and 4 are all follow-up platforms.

[0008] A further feature of this invention is that the hydraulic servo system includes a return oil filter, a high-pressure oil filter, a pressure transmitter, an accumulator, an electro-hydraulic servo valve, an electromagnetic switch, a safety valve, a throttle valve, and a loading actuator. The electromagnetic switch is connected to the electro-hydraulic servo valve, and the throttle valve is connected to the electromagnetic switch, the safety valve, and the loading actuator.

[0009] A further feature of this invention is that the measurement and control system includes a multi-channel controller and a signal acquisition system, wherein the signal acquisition system is connected to test benches 1, 2, 3 and 4, and test bench 1 is connected to the multi-channel controller.

[0010] A further feature of this invention is that both the left and right platforms include an outer frame, a loading structure, a reverse motion guide device, and a gravity slide rail.

[0011] A further feature of this invention is that the outer frame is made of aerospace steel, and the loading structure integrates a six-degree-of-freedom motion simulation device.

[0012] A further feature of this invention is that the signal acquisition system includes a laser sensor, a piezoelectric sensor, a turbine flow meter, and a temperature sensor.

[0013] A further feature of this invention is that both the pressure transmitter and the accumulator are connected to a high-pressure oil filter, and the high-pressure oil filter is connected to a return oil filter.

[0014] The beneficial effects of this utility model are:

[0015] This invention overcomes the limitations of traditional testing technologies by constructing a four-dimensional coupled testing system of "environment-load-control-diagnosis". It realizes dynamic load simulation, automated testing process and full life cycle health assessment, and has strong adaptability. For example, by changing the sensor module and load model, it can be adapted to the testing requirements of aerospace attitude control hydraulic valves or electric thrust reversers. This system has been verified by the thrust reverser system of China's large transport aircraft. It can significantly improve testing efficiency and accuracy, reduce maintenance costs, and is suitable for high-end hydraulic testing scenarios in the fields of aviation, aerospace and new energy aircraft. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a hydraulic thrust counterforce testing system proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of a hydraulic test platform for reverse thrust.

[0019] Figure 3 This is a schematic diagram of a hydraulic servo system.

[0020] Figure 4 This is a schematic diagram of the measurement and control system.

[0021] Figure 5 This is the flowchart of the main control system.

[0022] In the diagram, 1. Return oil filter; 2. High-pressure oil filter; 3. Pressure transmitter; 4. Accumulator; 5. Electro-hydraulic servo valve; 6. Solenoid switch; 7. Safety valve; 8. Throttle valve; 9. Loading actuator; 10. Left platform; 11. Right platform. Detailed Implementation

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0024] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] See Figures 1-5 This utility model provides a hydraulic thrust reverser testing system, comprising:

[0026] The hydraulic test platform for thrust reverser, hydraulic servo system, measurement and control system and main control system work together to complete a comprehensive test of the hydraulic actuator of the thrust reverser device.

[0027] Based on an FPGA+ARM hardware architecture, an adaptive control algorithm (PID-fuzzy control, settling time ≤50ms) and a PHM (problem prediction and health management) module are deployed. The main control software adopts a modular design, supports user-defined test schemes (such as step response, sine sweep frequency), and automatically generates an evaluation report containing a health index (HI≥0.8 is normal).

[0028] Based on the preset test plan, the main control system automatically adjusts the parameters (integrating PID-fuzzy control algorithm library and PHM diagnostic module) and generates a diagnostic report, improving test efficiency by more than 40% (single test time ≤ 1.2h).

[0029] The hydraulic test platform for reverse thrust includes two left platforms 10 and two right platforms 11. The left platform 10 includes platform 1 and platform 2, and the right platform 11 includes platform 3 and platform 4. Platforms 1, 2, 3 and 4 are arranged sequentially from left to right. Platform 1 is the main loading platform, and platforms 2, 3 and 4 are all follow-up platforms.

[0030] In the thrust reverser hydraulic testing system, the thrust reverser hydraulic testing platform, hydraulic servo system, measurement and control system, and main control system work together. The main control system generates a dynamic load curve using a preset algorithm based on the input target operating parameters (such as airspeed and angle of attack), and then sends commands to the hydraulic servo system. The hydraulic servo system outputs corresponding flow and pressure according to the commands, driving the thrust reverser to simulate actions. During this process, the measurement and control system collects various data (displacement, pressure, temperature, etc.) in real time and transmits them to the main control system. The main control system analyzes the collected data to determine if there are any deviations in the performance of the thrust reverser. If deviations are found, it sends adjustment commands to the hydraulic servo system to ensure the accuracy of the test. After the test is completed, the main control system automatically generates a report including a health status assessment.

[0031] Specifically, the hydraulic servo system includes a return oil filter 1, a high-pressure oil filter 2, a pressure transmitter 3, an accumulator 4, an electro-hydraulic servo valve 5, a solenoid switch 6, a safety valve 7, a throttle valve 8, and a loading actuator 9. The solenoid switch 6 is connected to the electro-hydraulic servo valve 5, the throttle valve 8 is connected to the solenoid switch 6, the safety valve 7, and the loading actuator 9, the pressure transmitter 3 and the accumulator 4 are both connected to the high-pressure oil filter 2, and the high-pressure oil filter 2 is connected to the return oil filter 1.

[0032] Through the above structure, a dual redundant hydraulic energy supply system is integrated (maximum flow rate of 120L / min per pump, pressure 0-50MPa), using an electro-hydraulic servo valve 5 (frequency response ≥200Hz) and an accumulator 4 (volume 80L, pre-charged nitrogen pressure 35MPa); through the linkage of the throttle valve 8 (linearity error ≤1%) with flight operating parameters (airspeed, angle of attack), a dynamic load model is constructed, expanding the test dimensions, and the load simulation error is ≤3% (compared to 15% of the traditional system); combined with a six-degree-of-freedom motion platform, multi-directional load coupling in space is achieved (axial force ±50kN, lateral force ±10kN), ensuring high-pressure, high-frequency energy output.

[0033] Specifically, the measurement and control system includes a multi-channel controller (sampling frequency ≥10kHz) and a signal acquisition system. The signal acquisition system is connected to test benches 1, 2, 3 and 4, and test bench 1 is connected to the multi-channel controller.

[0034] Specifically, both the left platform 10 and the right platform 11 include an outer frame, a loading structure, a reverse thrust motion guide device, and a gravity slide rail. The outer frame is made of aerospace steel with a tensile strength ≥450MPa. The loading structure integrates a six-degree-of-freedom motion simulation device with a repeatability accuracy of ±0.05mm.

[0035] Specifically, the signal acquisition system includes a laser sensor (accuracy ±0.01mm), a piezoelectric sensor (accuracy ±0.01mm), a turbine flow meter (accuracy ±0.5%FS), and a temperature sensor (PT100 probe, temperature range -50~150℃).

[0036] The thrust-reverse hydraulic test platform is connected to the hydraulic servo system via a high-pressure pipeline to ensure sealing; the measurement and control system is equipped with displacement sensors (accuracy ±0.01mm), pressure sensors (range 0-50MPa), temperature sensors, etc., and connected to the main control system; the main control system deploys an adaptive control algorithm (PID-fuzzy control algorithm library) and a PHM diagnostic module.

[0037] Test process

[0038] Step 1: Input the target operating parameters (such as airspeed and angle of attack), and the main control system will generate a dynamic load curve;

[0039] Step 2: The hydraulic servo system outputs the corresponding flow rate and pressure according to the command, driving the reverse thrust device to simulate the action;

[0040] Step 3: The measurement and control system collects data in real time, and the main control system analyzes performance deviations and sends back adjustment instructions;

[0041] Step 4: After the test is completed, a report containing a health status assessment will be automatically generated.

[0042] Extended Applications

[0043] By replacing the sensor module and load model, it can be adapted to the testing requirements of aerospace attitude control hydraulic valves or electric thrust reversers.

[0044] This system has been verified by China's large transport aircraft thrust reverser system. It can significantly improve testing efficiency and accuracy, reduce maintenance costs, and is suitable for high-end hydraulic test ranges in the fields of aviation, aerospace and new energy aircraft.

[0045] The present invention provides a detailed description of a hydraulic thrust counterforce testing system. Specific embodiments have been used to illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and are intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A reverse thrust hydraulic test system, characterized by, The utility model relates to a hydraulic test platform for anti-thrust force, which comprises a hydraulic servo system, a measurement and control system and a main control system. The hydraulic test platform for anti-thrust force comprises two left stands (10) and two right stands (11), the left stand (10) comprises stand 1 and stand 2, the right stand (11) comprises stand 3 and stand 4, the stand 1, the stand 2, the stand 3 and the stand 4 are sequentially arranged from left to right, the stand 1 is a main loading stand, and the stand 2, the stand 3 and the stand 4 are all follow-up stands. The hydraulic servo system comprises an oil return filter (1), a high-pressure oil filter (2), a pressure transmitter (3), an accumulator (4), an electro-hydraulic servo valve (5), an electromagnetic switch (6), a safety valve (7), a throttle valve (8) and a loading actuator (9), the electromagnetic switch (6) is connected with the electro-hydraulic servo valve (5), the throttle valve (8) is connected with the electromagnetic switch (6), the safety valve (7) and the loading actuator (9).

2. A back-driveable hydraulic test system according to claim 1, wherein, The measurement and control system comprises a multi-channel controller and a signal acquisition system, the signal acquisition system is connected with the stand 1, the stand 2, the stand 3 and the stand 4, and the stand 1 is connected with the multi-channel controller.

3. The reverse thrust hydraulic test system of claim 1, wherein, The left stand (10) and the right stand (11) both comprise an outer frame, a loading frame structure, an anti-thrust movement guide device and a gravity slide rail.

4. The reverse thrust hydraulic test system of claim 1, wherein, The outer frame is made of aviation steel material, and the loading frame structure is integrated with a six-degree-of-freedom motion simulation device.

5. A back-driveable hydraulic test system according to claim 4, wherein, The signal acquisition system comprises a laser sensor, a piezoelectric sensor, a turbine flowmeter and a temperature sensor.

6. The reverse thrust hydraulic test system of claim 3, wherein, The pressure transmitter (3) and the accumulator (4) are both connected with the high-pressure oil filter (2).

7. The reverse thrust hydraulic test system of claim 2, wherein, The high-pressure oil filter (2) is connected with the oil return filter (1).

8. The reverse thrust hydraulic test system of claim 2, wherein, ​

Images