Single-link anti-thrust mechanism simulation test-bed with servo loading device
By designing a single-link reverse thrust mechanism simulation test rig, and utilizing guide rail coating and planetary gear system to drive the loading mechanism, the problems of complex structure and jamming failure of existing test rigs were solved, achieving high-precision simulation of the motion law of the flow barrier and aerodynamic load, and simplifying the test rig structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NORTHEASTERN UNIV CHINA
- Filing Date
- 2022-12-26
- Publication Date
- 2026-05-19
AI Technical Summary
Existing test benches for aero-engine thrust reversers are unable to effectively simulate the motion and friction characteristics of flow gates, leading to jamming failures. Furthermore, they are complex in structure, costly, and cannot provide in-depth research on the impact of nonlinear factors on dynamics.
Design a single-link reverse thrust mechanism simulation test bench with a follow-up loading device. The friction and wear are simulated by the coating of the guide rail and the moving outer cover. The loading mechanism is driven by a planetary gear system. Sensors are installed to measure the motion state of key components. The flow obstruction gate structure is simplified and aerodynamic loads are simulated.
It improves the design and control accuracy of the test bench, enables efficient study of the mechanism of resistance force change, simplifies the test bench structure, reduces the processing difficulty, and realizes high-precision aerodynamic load simulation and choke gate motion law research.
Smart Images
Figure CN116007950B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of simulation technology for aero-engine thrust reverser devices, and in particular to a simulation test bench for a single-link thrust reverser mechanism with a follow-up loading device. Background Technology
[0002] A thrust reverser is a device that changes the direction of engine thrust, primarily used to reduce aircraft speed and shorten takeoff distance after touchdown. Because thrust reversers are unaffected by weather conditions such as rain or snow, offer good braking performance, and have a high safety factor, they are widely used in turbojet and turbofan engines of civilian, military transport, and commercial airliners. For blade-type thrust reversers, the overall structure is complex due to the large number and variety of moving parts and kinematic pairs. In practical engineering, jamming failures can occur, manifesting as momentary stagnation in the mechanism's operation, leading to flight malfunctions. This jamming phenomenon has not yet been effectively resolved. Furthermore, the addition of the choke gate conversion lever makes the mechanism a two-degree-of-freedom mechanism, making its kinematics and dynamics more sensitive to nonlinear factors.
[0003] Existing research on thrust reverser test benches includes the engine thrust reverser test bench disclosed in Chinese patent CN202255879U, which mainly consists of a fan, mounting frame, transition section, and airflow channel. It is used to test whether the main data of the thrust reverser meets the installation requirements. This thrust reverser test bench mainly applies aerodynamic loads to the test bench through a wind pressure supply device, while simultaneously detecting the smoothness of the thrust reverser mechanism's movement during opening and closing, as well as the opening and closing time of the thrust reverser door. The load application device of this test bench mainly consists of a fan blade and a motor. However, due to the large aerodynamic loads experienced by the engine thrust reverser in actual conditions, simulating these loads with a fan blade is difficult, and the airflow loading places high demands on the sealing of the experimental device. Furthermore, this test bench lacks research on the motion law of the choke mechanism. There is also a lack of in-depth research on the moving outer casing guide rail, and an analysis of the impact of changes in the friction characteristics at the guide rail on the thrust reverser jamming problem is missing.
[0004] The paper "Development and Verification of a Thrust Reversal Device Model Test Bench" introduces a turbofan engine thrust reverser device model test bench. This test bench mainly consists of an intake system, a sealing and heating system, an exhaust system, a fuel system, an electrical system, a measurement and control system, a force measurement system, a cooling gas system, and a cooling water system. It can be used for basic testing of aero-engine thrust reversers, functional nozzles, exhaust devices, and other components. This turbofan engine thrust reverser device model test bench incorporates relatively complete intake and exhaust systems, a fuel system, and a measurement and control system for testing aero-engine thrust reversers, functional nozzles, exhaust devices, and other components. While primarily used for testing the overall functional system of the thrust reverser device, this test bench is not suitable for dynamic analysis of individual components within the thrust reverser mechanism. Furthermore, the test bench has a complex structure and high manufacturing cost. Summary of the Invention
[0005] To address the aforementioned problems, the present invention aims to provide a simulation test bench for a single-link reverse thrust mechanism containing a follow-up loading device. The test bench simulates the actual contact state of the main and auxiliary guide beam moving pairs, considers the load transmission law, studies the variation law of the resisting force, understands the mechanism of resisting force variation, and thus determines the relevant parameters affecting the resisting force. It also considers the influence of nonlinear factors such as friction, wear, clearance, flexibility, and drive on the mechanism's dynamics, analyzes the influence law of nonlinear factors on dynamics, and identifies the jamming factors of the reverse thrust device.
[0006] The technical solution adopted in this invention is as follows:
[0007] The present invention proposes a single-link reverse thrust mechanism simulation test bench with a follow-up loading device, comprising a base plate, a guide rail fixing frame, a guide rail, a flow-blocking gate, a movable outer cover, a driving hydraulic cylinder, a hydraulic cylinder support, a flow-blocking gate motion assembly, and a follow-up loading mechanism; the guide rail fixing frame is symmetrically arranged on the left and right sides of the upper surface of the base plate; the guide rail is connected between the middle of the lower end face of the top side of the two guide rail fixing frames; the movable outer cover cooperates with the guide rail sliding pair; the top of the back of the flow-blocking gate is hinged to the lower end of the movable outer cover through an ear ring; the hydraulic cylinder support is arranged on the left side of the upper surface of the base plate; the driving hydraulic cylinder is fixed by the hydraulic cylinder support and corresponds to the guide rail; the front side of the piston rod of the driving hydraulic cylinder is connected to the upper end of the movable outer cover, driving the movable outer cover to perform linear reciprocating motion along the guide rail; the follow-up loading mechanism is symmetrically arranged on both sides of the flow-blocking gate; the flow-blocking gate motion assembly is arranged below the flow-blocking gate and hinged to the back of the flow-blocking gate.
[0008] Furthermore, the follow-up loading mechanism includes a loading hydraulic cylinder, a servo motor, a reducer, a planetary gear train, and a motor bracket; the planetary gear train is symmetrically arranged on both sides of the flow-blocking gate; the loading hydraulic cylinders are symmetrically arranged on both sides of the central area of the bottom surface of the flow-blocking gate, and the piston rod ends of the loading hydraulic cylinders on both sides are respectively hinged to the corresponding positions on both sides of the bottom surface of the flow-blocking gate through spherical bearings, and the cylinder ends are respectively connected to the planetary gear train; the motor bracket is arranged on one side of the front end of the upper surface of the base plate; the servo motor is fixed on the top of the motor bracket, and its output end is connected to the planetary gear train through the reducer.
[0009] Furthermore, the planetary gear system includes an internal gear ring, a gear ring holder, a central gear, a gear support, planet gears, planet gear shafts, and a planet carrier. The internal gear ring is symmetrically arranged on both sides of the flow-blocking gate and connected to the base plate through the gear ring holder. The central gears are coaxially arranged at the center of the internal gear ring and connected to the base plate through the gear support. The planet gears are meshed between the central gear and the internal gear ring. The planet gear shafts are coaxially arranged between the two planet gears. The cylinder ends of the hydraulic cylinders on both sides of the flow-blocking gate are connected to both sides of the planet gear shaft through lugs, and the lugs are fixed at the connection points, with no relative movement between the cylinder bodies and the gear shafts. The planet carrier is connected between the outer end faces of the central gear and the planet gears located on the same side.
[0010] Furthermore, the flow-blocking gate moving assembly includes a conversion pull rod, a flow-blocking gate pull rod, and an inner channel support; the inner channel support is correspondingly disposed below the flow-blocking gate; a fixed support is provided on the lower middle side of the back of the flow-blocking gate for installing the conversion pull rod; one end of the flow-blocking gate pull rod is connected to the conversion pull rod, and the other end is connected to the inner channel support.
[0011] Furthermore, a mechanical limiting rod is provided at the rear end of the flow-blocking gate to limit the vertical degree of freedom of the flow-blocking gate and ensure the stability of the flow-blocking gate during the translational phase.
[0012] Furthermore, the contact surfaces of the guide rail and the movable outer cover are coated with a material to simulate the friction and wear state of the key moving pairs.
[0013] Furthermore, a displacement sensor is installed on the upper part of the cylinder body of the driving hydraulic cylinder to measure the driving speed. The measured value is fed back to the hydraulic pump station through the sensor to realize the control of the driving speed. A tension and compression sensor is installed at the end of the piston rod of the driving hydraulic cylinder to measure the resistance force of the mechanism.
[0014] Furthermore, the driving hydraulic cylinder is a trunnion type hydraulic cylinder, which is connected to the hydraulic cylinder bracket via a trunnion and can swing up and down via the trunnion.
[0015] Furthermore, a torsion spring is installed at the connection between the switching rod and the flow-blocking gate, so that the switching rod is always subjected to a counterclockwise torsional force, which is used to ensure the uniqueness of the relative movement between the switching rod and the flow-blocking gate.
[0016] Furthermore, tilt sensors are respectively installed on the bottom surface of the flow barrier and the cylinder body of the loading hydraulic cylinder. The measured angle difference is fed back to the servo motor. The position of the loading hydraulic cylinder is adjusted by controlling the rotation speed of the center wheel through the servo motor, thereby ensuring that the direction of the loading force is always perpendicular to the surface of the flow barrier during the movement of the flow barrier. By controlling the magnitude of the loading force, high-precision simulation of the aerodynamic load on the flow barrier is achieved.
[0017] Compared with the prior art, the present invention has the following advantages:
[0018] 1. By taking a single-link reverse thrust mechanism as the research object, the complexity of large-scale space reverse thrust mechanisms is simplified, which is conducive to improving the design accuracy of the test bench, carrying out nonlinear dynamics research on the mechanism, and better verifying the numerical theoretical model.
[0019] 2. The guide rail and moving cover of the reverse thrust mechanism have been simplified. Based on the linear guide rail, a slider-type moving cover that cooperates with the guide rail has been designed. A coating is set on the contact surface between the guide rail and the moving cover, which reduces the processing difficulty while retaining the true contact state of the key motion pair.
[0020] 3. The shape of the flow-blocking gate is simplified. The complex arc-shaped flow-blocking gate is designed as a multi-hinge T-shaped plate. The position and size of the hinge points are obtained through equivalent calculations to ensure the true transmission of force on the mechanism.
[0021] 4. By using concentrated force to simulate the aerodynamic load on the flow-blocking gate, the influence of sealing performance on the test bench is eliminated, simplifying the complexity of the test bench.
[0022] 5. Two loading hydraulic cylinders are set up and symmetrically installed on the inner surface of the flow barrier. Therefore, the loading can not only simulate the uniform loading of the flow barrier, but also simulate the eccentric loading of the flow barrier surface by adjusting the thrust of the loading hydraulic cylinder.
[0023] 6. The follow-up loading motion is achieved by a motor-driven planetary gear system. The loading mechanism has a fast adjustment speed, stable motion, and high precision.
[0024] 7. Removable bushings are installed at key kinematic joints of the mechanism. By replacing bushings of different sizes, the influence of joint clearance size and clearance position on the kinematics and dynamics of the mechanism can be studied.
[0025] 8. A conversion tie rod was added between the flow-blocking gate and the flow-blocking gate tie rod to meet the research and experimentation requirements for the motion law of the flow-blocking gate under different load conditions.
[0026] 9. Install sensor measuring devices at key components and key moving parts to improve the adjustment accuracy of the control system through data feedback, and at the same time study and observe the overall force transmission path and force conditions of each key component. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0028] Figure 2 This is a schematic diagram of the follow-up loading device in the retracted state of the flow control gate;
[0029] Figure 3 This is a schematic diagram of the follow-up loading device in the deployed state of the flow-blocking gate;
[0030] Figure 4 yes Figure 1 A schematic diagram of the right-side view structure;
[0031] Figure 5 This is a schematic diagram of the flow control gate;
[0032] Figure 6 This is a schematic diagram of the testing principle of the test bench of this invention. Detailed Implementation
[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] It should be noted that in the description of this invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not mean that the device or element must have a specific orientation, or be constructed and operated in a specific orientation.
[0035] like Figures 1 to 5 As shown, the overall structure of a simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device proposed in this invention is given. The test bench includes a base plate 1, a flow-blocking gate 6, a guide rail 7, a movable outer cover 8, a driving hydraulic cylinder 11, two guide rail fixing frames 12, a hydraulic cylinder support 25, a flow-blocking gate motion assembly, and a follow-up loading mechanism.
[0036] Two guide rail fixing brackets 12 are respectively fixed to the left and right sides of the upper surface of the base plate 1 and are symmetrical to each other, forming rectangular frames; the guide rail 7 is fixed between the middle of the lower end face of the top side of the two guide rail fixing brackets 12; the movable outer cover 8 is connected to the guide rail 7 sliding pair, and the contact surface of the guide rail 7 and the movable outer cover 8 is provided with a material coating to simulate the friction and wear state of the key moving pair; earrings are respectively provided at the upper and lower ends of the movable outer cover 8; earring 62 is provided at the middle of the top of the back of the flow barrier 6, and earring 62 is provided in the lower area of the back. A fixed support has symmetrically arranged earrings 61 on both sides of the central area of the bottom surface. The flow-blocking gate 6 is hinged to the lower earring of the movable outer cover via earrings 62, and moves with the movement of the movable outer cover. The hydraulic cylinder bracket 25 is fixed on the left side of the upper surface of the base plate. The driving hydraulic cylinder 11 is fixed to the top of the hydraulic cylinder bracket 25 and is parallel to the guide rail 7. In this embodiment, the driving hydraulic cylinder 11 is a trunnion type hydraulic cylinder, which is hinged to the hydraulic cylinder bracket via a trunnion. It can swing up and down via the trunnion to reduce constraints and lower installation accuracy. The front side of the piston rod of the driving hydraulic cylinder 11 is connected to the upper earring of the movable outer cover 8, which can drive the movable outer cover 8 to move linearly along the guide rail 7. A displacement sensor 10 is installed on the upper part of the cylinder body of the driving hydraulic cylinder 11 to measure the driving speed. The measured value is fed back to the hydraulic pump station through the sensor to realize the control of the driving speed. A tension and compression sensor 9 is installed at the end of the piston rod of the driving hydraulic cylinder 11 to measure the resistance force of the mechanism.
[0037] The servo loading mechanism includes two loading hydraulic cylinders 5, a servo motor 14, a reducer 15, a planetary gear train, and a motor bracket 16. The planetary gear train is symmetrically arranged on both sides of the flow barrier 6. The two loading hydraulic cylinders are symmetrically arranged on both sides of the central area of the bottom surface of the flow barrier 6, and the piston rod ends of the two loading hydraulic cylinders are respectively hinged to the lugs at corresponding positions on the bottom surface of the flow barrier 6. The motor bracket 16 is fixed to one side of the front end of the upper surface of the base plate 1. The servo motor 14 is fixed to the top of the motor bracket 16, and its output end is connected to the planetary gear train through the reducer 15. Angle sensors 19 are respectively installed at the front end of the bottom surface of the flow barrier 6 and the upper end of the cylinder body of the loading hydraulic cylinder 5. The measured angle difference is fed back to the servo motor 14. The position of the loading hydraulic cylinder 5 is adjusted by controlling the rotation speed of the central wheel 3. By controlling the magnitude of the loading force, the direction of the loading force is always perpendicular to the surface of the flow barrier 6 during the movement of the flow barrier 6, thereby achieving high-precision simulation of the aerodynamic load on the flow barrier 6.
[0038] The planetary gear system includes two planetary gears 2, two central gears 3, two internal gear rings 4, two gear ring holders 13, two planet carriers 17, two gear supports 18, and planetary gear shafts 24. The two internal gear rings 4 are symmetrically arranged on both sides of the flow-blocking gate 6 and fixed to the base plate 1 through the rectangular gear ring holders 13. The two central gears 3 are coaxially arranged inside the two internal gear rings 4 and are respectively connected to the gear supports 18 at the center of their inner end faces. The gear supports 18 are fixed to the base plate 1. The rotation axis of the outer end face of the central wheel 3 is connected to the output end of the servo motor 14 through the reducer 15; two planetary gears 2 are respectively meshed between the central wheel 3 and the internal gear ring 4 on each side; the planetary gear shaft 24 is coaxially connected between the two planetary gears 2; the cylinder ends of the loading hydraulic cylinders 5 on both sides of the flow barrier 6 are respectively connected to the two sides of the planetary gear shaft 24 through lugs, and the lug connection is fixed, so there is no relative movement between the cylinder and the planetary gear shaft 24; two planet carriers 17 are respectively connected between the outer end face axes of the central wheel 3 and the planetary gear 2 on the same side.
[0039] The flow-blocking gate motion assembly includes a conversion pull rod 23, a flow-blocking gate pull rod 21, and an inner channel support 22. The position of the inner channel support 22 is determined by the initial state of the flow-blocking gate 6 and each pull rod. In this embodiment, the inner channel support 22 is installed on the lower left side of the flow-blocking gate 6. The fixed support 26 in the lower middle region of the back of the flow-blocking gate 6 is used to install the conversion pull rod 23. One end of the flow-blocking gate pull rod 21 is hinged to the conversion pull rod 23, and the other end is hinged to the top support of the inner channel bracket. The flow-blocking gate pull rod 21 is designed to be processed using materials with different stiffnesses to simulate the influence of flexible components in the test. The movable outer cover 8 moves linearly along the guide rail 7, causing the flow-blocking gate 6 to first translate around the conversion pull rod 23, and then flip around the flow-blocking gate pull rod 21. To ensure the uniqueness of the movement of the conversion pull rod 23 and the flow-blocking gate 6, a torsion spring is installed at the connection between the conversion pull rod 23 and the fixed support 26 on the flow-blocking gate 6, so that the conversion pull rod 23 is always subjected to a counterclockwise torsional force.
[0040] In this embodiment, a mechanical limiting rod 20 is vertically provided at the back end of the flow-blocking door 6. Its length corresponds to the vertical distance when the flow-blocking door 6 is parallel to the movable outer cover 8. It is used to limit the degree of freedom of the flow-blocking door 6 in the vertical direction and ensure the stability of the flow-blocking door 6 in the translational phase.
[0041] The testing method of the test bench of this invention includes the following steps:
[0042] 1. Debug the test bench equipment to bring the mechanism to its initial state;
[0043] 2. Simultaneously activate the drive hydraulic cylinder and servo motor, and the test bench will begin operation;
[0044] 3. The direction of the force applied to the flow-restricting gate is controlled by real-time monitoring and feedback data through the tilt sensor;
[0045] 4. The synchronization of the loading hydraulic cylinder is controlled by the hydraulic pipeline valve;
[0046] 5. The speed of the hydraulic cylinder is controlled by a displacement sensor to ensure stable operation of the moving outer cover;
[0047] 6. Real-time changes in the driving force of the mechanism are measured using a force sensor;
[0048] 7. Record the experimental results, shut down and tidy up the experimental apparatus.
[0049] This invention is based on a single-link thrust reverser mechanism. Considering the contact relationships of key kinematic pairs, the complex components of the mechanism are simplified equivalently. Simultaneously, a mechanism drive and a flow-blocking gate follow-up loading mechanism are incorporated, resulting in a test bench capable of conducting multiple research and experimental projects. This test bench can carry out a series of kinematic and dynamic research experiments on the thrust reverser mechanism, including studying the influence of nonlinear factors such as clearance and flexibility on the dynamics of the mechanism, the variation law of friction and wear at key kinematic pairs, and the overall force transmission characteristics and load transfer law of the mechanism, identifying the influence of various factors on the mechanism's jamming force. Simultaneously, the flow-blocking gate follow-up loading mechanism accurately simulates the aerodynamic loads on the flow-blocking gate, solving the problem of vertical surface loading under flow-blocking gate motion.
[0050] Matters not covered in this invention are common knowledge.
[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device, characterized in that: The test bench includes a base plate, a guide rail fixing frame, a guide rail, a flow-blocking gate, a movable outer cover, a drive hydraulic cylinder, a hydraulic cylinder support, a flow-blocking gate motion assembly, and a follow-up loading mechanism. The guide rail fixing frames are symmetrically arranged on the left and right sides of the upper surface of the base plate. The guide rails are connected between the middle of the lower end faces of the top sides of the guide rail fixing frames on both sides. The movable outer cover cooperates with the guide rail sliding pair. The top of the back of the flow-blocking gate is hinged to the lower end of the movable outer cover through an ear ring. The hydraulic cylinder support is located on the left side of the upper surface of the base plate. The drive hydraulic cylinder is fixed by the hydraulic cylinder support and corresponds to the guide rail. The front side of the piston rod of the drive hydraulic cylinder is connected to the upper end of the movable outer cover, driving the movable outer cover to perform linear reciprocating motion along the guide rail. The follow-up loading mechanism is symmetrically arranged on both sides of the flow-blocking gate. The flow-blocking gate motion assembly is located below the flow-blocking gate and is hinged to the back of the flow-blocking gate. The follow-up loading mechanism includes a loading hydraulic cylinder, a servo motor, a reducer, a planetary gear train, and a motor bracket; the planetary gear train is symmetrically arranged on both sides of the flow-blocking gate; the loading hydraulic cylinders are symmetrically arranged on both sides of the central area of the bottom surface of the flow-blocking gate, and the piston rod ends of the loading hydraulic cylinders on both sides are respectively hinged to the corresponding positions on the bottom surface of the flow-blocking gate through spherical bearings, and the cylinder ends are respectively connected to the planetary gear train; the motor bracket is arranged on one side of the front end of the upper surface of the base plate; the servo motor is fixed on the top of the motor bracket, and its output end is connected to the planetary gear train through the reducer; The planetary gear system includes an internal gear ring, a gear ring holder, a central gear, a gear support, planetary gears, planetary gear shafts, and a planetary carrier. The internal gear rings are symmetrically arranged on both sides of the flow-blocking gate and connected to the base plate through the gear ring holder. The central gears are coaxially arranged at the center of the internal gear rings and connected to the base plate through the gear support. The planetary gears are meshed between the central gears and the internal gear rings. The planetary gear shafts are coaxially arranged between the two planetary gears. The cylinder ends of the hydraulic cylinders on both sides of the flow-blocking gate are connected to both sides of the planetary gear shafts through lugs, and the lugs are fixed at the connection points, with no relative movement between the cylinder bodies and the gear shafts. The planetary carriers are connected between the central gear and the outer end face axis of the planetary gears located on the same side. A displacement sensor is installed on the upper part of the cylinder body of the driving hydraulic cylinder to measure the driving speed. The measured value is fed back to the hydraulic pump station through the sensor to realize the control of the driving speed. A tension and compression sensor is installed at the end of the piston rod of the driving hydraulic cylinder to measure the resistance force of the mechanism. Inclination sensors are installed on the bottom surface of the flow barrier and the cylinder body of the loading hydraulic cylinder. The measured angle difference is fed back to the servo motor. The servo motor controls the rotation speed of the central wheel to adjust the position of the loading hydraulic cylinder, thereby ensuring that the direction of the loading force is always perpendicular to the surface of the flow barrier during the movement of the flow barrier. By controlling the magnitude of the loading force, high-precision simulation of the aerodynamic load on the flow barrier is achieved.
2. The simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device according to claim 1, characterized in that: The flow-blocking gate moving assembly includes a conversion pull rod, a flow-blocking gate pull rod, and an inner channel support; the inner channel support is correspondingly arranged below the flow-blocking gate; a fixed support is provided on the lower middle side of the back of the flow-blocking gate for installing the conversion pull rod; one end of the flow-blocking gate pull rod is connected to the conversion pull rod, and the other end is connected to the inner channel support.
3. The simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device according to claim 1, characterized in that: A mechanical limiting rod is provided at the rear end of the flow-blocking gate to limit the vertical degree of freedom of the flow-blocking gate and ensure the stability of the flow-blocking gate during the translational phase.
4. The simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device according to claim 1, characterized in that: The contact surfaces of the guide rail and the movable outer cover are coated with a material to simulate the friction and wear state of key moving pairs.
5. The simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device according to claim 1, characterized in that: The driving hydraulic cylinder is a trunnion type hydraulic cylinder, which is connected to the hydraulic cylinder bracket through a trunnion and swings up and down through the trunnion.
6. The simulation test bench for a single-link reverse thrust mechanism with a follow-up loading device according to claim 2, characterized in that: A torsion spring is installed at the connection between the conversion rod and the flow barrier, so that the conversion rod is always subjected to a counterclockwise torsional force, which is used to ensure the uniqueness of the relative motion between the conversion rod and the flow barrier.