A servo loading device and method of assembly thereof

Abstract

This invention provides a follow-up loading device and its assembly method, belonging to the field of mechanical loading technology. The follow-up loading device includes: a fixed mounting frame, a fixed pulley, a steel wire rope, a spring, and a hydraulic servo actuator. The fixed mounting frame is connected to the loading surface of the test piece. The fixed mounting frame has a fixed pulley mounting section, and the fixed pulley is fixed on the fixed mounting frame. The steel wire rope connecting the loading surface of the test piece passes through the fixed pulley and connects to the spring. The spring is vertically suspended between the fixed pulley and the hydraulic servo actuator. The hydraulic servo actuator is in a vertically suspended state, and its end is mounted on an actuator holder. This invention meets the requirements of fixed-angle loading, nonlinear change loading of loading position, and rapid loading of aerodynamic loads, improving the accuracy and reliability of iron bird tests and aircraft movable wing tests. It is used for simulating large displacement and rapid follow-up loading of aerodynamic loads in iron bird tests and aircraft movable wing tests.

Description

Technical Field

[0001] This invention belongs to the field of mechanical loading technology, specifically relating to a follow-up loading device and its assembly method. Background Technology

[0002] During the research and development and testing of aircraft, aerodynamic load simulation tests are required to verify the feasibility and stability of the design. A key challenge in these tests is ensuring the aerodynamic loads are applied at a constant angle, with nonlinear variations in the loading position, and under rapid loading conditions.

[0003] In related technologies, at least two hydraulic servo systems are often used to coordinate and control the magnitude of the load and the position of the loading point. With the continuous upgrading of aircraft performance, iron bird tests and aircraft movable wing tests have placed increasingly higher demands on the speed and large displacement response of aerodynamic load follow-up simulation loading. Follow-up loading devices under conventional conditions can no longer fully adapt to and match the new requirements of large displacement and rapid follow-up. Summary of the Invention

[0004] To address the technical problem that existing follow-up loading devices are no longer fully adaptable to and compatible with the new requirements of large displacement and rapid follow-up, this invention provides a follow-up loading device and its assembly method. The technical solution is as follows:

[0005] In a first aspect, a follow-up loading device is provided, comprising: a fixed mounting bracket, a fixed pulley, a wire rope, a spring, and a hydraulic servo actuator.

[0006] The fixed mounting frame is connected to the loading surface of the test piece. The fixed mounting frame is equipped with a fixed pulley mounting section. The fixed pulley is fixed on the fixed mounting frame. The steel wire rope connecting the loading surface of the test piece passes through the fixed pulley and is connected to the spring. The spring is vertically suspended between the fixed pulley and the hydraulic servo actuator. The hydraulic servo actuator is in a vertically suspended state, and its end is installed on the actuator fixed seat.

[0007] There are two fixed pulleys, and the fixed mounting bracket has two fixed pulley mounting sections.

[0008] The mounting bracket is attached to the loading surface of the test specimen.

[0009] The steel wire rope is attached to the loading surface of the test piece.

[0010] The spring is connected to the hydraulic servo actuator via a steel wire rope.

[0011] The hydraulic servo actuator cylinder is mounted on the actuator cylinder mounting base via a ball joint structure at its end.

[0012] Secondly, a method for assembling a follow-up loading device is provided, the follow-up loading device comprising any of the follow-up loading devices described in the first aspect, the method comprising:

[0013] Connect the test specimen to the fixed mounting bracket;

[0014] Adjust the position of the fixed pulley according to the needs of the experiment;

[0015] A steel wire rope is connected to the test piece, and after passing through a fixed pulley, it is connected to a spring. During the test, the hydraulic servo actuator simulates loading according to the load closed-loop control, and large displacements are quickly compensated by the spring.

[0016] The fixed mounting frame has two fixed pulley mounting sections. The steel wire rope passes through the first and second fixed pulleys and is then connected to the spring.

[0017] The spring is connected to the hydraulic servo actuator via a steel wire rope.

[0018] Two fixed pulleys are fixed on the fixed mounting frame according to the relationship between the loading load angle, the loading load size and the position of the test piece.

[0019] The beneficial effects of this invention are at least as follows:

[0020] 1. The loading device, which consists of pulleys, springs and hydraulic servo actuators, can simultaneously ensure the requirements of fixed-angle loading, non-linear change loading of loading position and rapid loading, thus solving the problem that existing technologies cannot meet these requirements.

[0021] 2. The spring design is determined based on the magnitude of the applied load and the position of the test piece. It is preferably designed to generate an elastic force of half the actual load at the middle position, so that the loading device can quickly compensate for loads of different sizes, thereby improving the accuracy and reliability of the test.

[0022] 3. A hydraulic servo actuator is used for simulated loading, and closed-loop control is used to achieve precise control of the loading process, which can meet the requirements of different loads and improve the reliability and accuracy of the test results.

[0023] 4. This loading device has a simple structure, is easy to manufacture and maintain, and also has high practicality and economy, providing an effective solution for aerodynamic load simulation tests. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the initial position of a follow-up loading device provided by the present invention;

[0025] Figure 2 This is a schematic diagram of a certain loading position of a follow-up loading device provided by the present invention.

[0026] Among them, 1-fixed mounting bracket, 2-fixed pulley, 3-steel wire rope, 4-spring, 5-hydraulic servo actuator, 6-test piece. Detailed Implementation

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

[0028] This invention provides a large displacement rapid follow-up loading device based on pulleys, springs and hydraulic servo actuators, which can solve problems such as fixed-angle loading, nonlinear change loading of loading position and fast loading speed in aerodynamic load simulation in iron bird tests and aircraft movable wing tests.

[0029] like Figure 1 As shown, the follow-up loading device includes: a fixed mounting bracket 1, a fixed pulley 2, a steel wire rope 3, a spring 4, and a hydraulic servo actuator 5.

[0030] The fixed mounting bracket 1 is connected to the movable loading surface of the test specimen 6 and is adhered to the movable loading surface of the test specimen 6. The fixed mounting bracket 1 has two fixed pulley mounting sections. The first fixed pulley is used to ensure the load loading angle, and the second fixed pulley is used to match the positional relationship between the load and the test specimen 6, while also ensuring that the hydraulic servo actuator 5 and the spring 4 are in a stable, vertically suspended state. The two fixed pulleys are fixed to the fixed mounting bracket 1 according to the load angle, the magnitude of the load, and the positional relationship between the load and the test specimen 6. Figure 1 As shown, the position of the left fixed pulley is determined according to the loading angle of the test specimen; adjusting the position of the left fixed pulley adjusts the loading angle of the test specimen. The right fixed pulley is used to adjust the relationship between the trend of the loading force and the position of the test specimen, as shown... Figure 1 The matching is possible as the angle α of the test piece decreases (becomes...). Figure 2 The relationship between angle β and the increase in load on the moving spring.

[0031] Spring 4 is vertically suspended between two fixed pulleys 2 and a hydraulic servo actuator 5. The steel wire rope 3 connecting the loading surface of the test piece 6 passes through the fixed pulleys and is connected to spring 4. Spring 4 is connected to hydraulic servo actuator 5 via steel wire rope 3. Steel wire rope 3 is used to transfer load, and spring 4 is designed to be vertically suspended for rapid compensation of large displacements under test load.

[0032] The hydraulic servo actuator 5 is designed for vertical hoisting, with its end mounted on the actuator mounting base via a ball joint structure to simulate loading. The hydraulic servo actuator 5 is used for closed-loop load control, ensuring rapid loading of the servo load.

[0033] In use, first connect the test piece 6 to the fixed mounting bracket 1. Then, adjust the positions of the first and second fixed pulleys according to the test requirements to meet the test loading angle requirements. Next, attach and fix the steel wire rope 3 to the test piece 6, then pass it through the first and second fixed pulleys and connect it to the spring 4. The spring 4 is then fixed to the hydraulic servo actuator 5 via the steel wire rope 3. During the test, the hydraulic servo actuator 5 simulates loading according to the load closed-loop control, and large displacements are quickly compensated by the spring 4.

[0034] This embodiment achieves the requirements of fixed-angle loading, non-linear loading position variation loading, and rapid loading through the combination of a fixed mounting bracket 1, a fixed pulley 2, a steel wire rope 3, a spring 4, and a hydraulic servo actuator 5. The fixed installation of the fixed pulley 2 and the steel wire rope 3 on the test piece 6 ensures stable fixed-angle loading of the load, and this angle remains unchanged as the moving parts of the test piece 6 move. The fixed mounting bracket 1 and the fixed pulley 2 are fixedly installed on the moving parts of the test piece 6, ensuring complete follow-up under non-linear loading position variation conditions (the loading position variation curve in this example is arc-shaped). The addition of a passive loading spring 4 along the loading path of the steel wire rope 3 ensures rapid application of the follow-up load when the moving parts of the test piece 6 move. Combined with the closed-loop load control of the hydraulic servo actuator 5, this improves the accuracy and reliability of the test results. The initial position angle between the moving and fixed parts of the test piece 6 is α, and the angle under loading conditions is β. Figure 2 As shown.

[0035] This invention can simultaneously meet the requirements of fixed-angle loading, nonlinear loading with varying loading positions, and rapid loading. Furthermore, through the combination of a spring and a hydraulic servo actuator, it can rapidly compensate for and precisely control loads of different sizes, thereby improving the reliability and accuracy of test results. At the same time, this invention has a simple structure and low manufacturing and maintenance costs, providing a more reliable and economical solution for aerodynamic load simulation testing.

[0036] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A follow-up loading device, characterized in that, include: Fixed mounting bracket, fixed pulley, wire rope, spring, and hydraulic servo actuator. The fixed mounting frame is connected to the loading surface of the test piece. The fixed mounting frame is equipped with a fixed pulley mounting section. The fixed pulley is fixed on the fixed mounting frame. The steel wire rope connecting the loading surface of the test piece passes through the fixed pulley and is connected to the spring. The spring is vertically suspended between the fixed pulley and the hydraulic servo actuator. The hydraulic servo actuator is in a vertically suspended state, and its end is installed on the actuator fixed seat. There are two fixed pulleys. The fixed mounting frame has two fixed pulley mounting sections. The first fixed pulley is used to ensure the load loading angle. The second fixed pulley is used to match the load and the position relationship of the test piece, while ensuring that the hydraulic servo actuator and spring are in a stable vertical hoisting state.

2. The follow-up loading device according to claim 1, characterized in that, The mounting bracket is attached to the loading surface of the test specimen.

3. The follow-up loading device according to claim 1, characterized in that, The steel wire rope is attached to the loading surface of the test specimen.

4. The follow-up loading device according to claim 1, characterized in that, The spring is connected to the hydraulic servo actuator via a steel wire rope.

5. The follow-up loading device according to claim 1, characterized in that, The end of the hydraulic servo actuator is mounted on the actuator mounting base via a ball joint structure.

6. A method for assembling a follow-up loading device, characterized in that, The follow-up loading device includes the follow-up loading device according to any one of claims 1 to 5, and the method includes: Connect the test specimen to the fixed mounting bracket; Adjust the position of the fixed pulley according to the needs of the experiment; A steel wire rope is connected to the test piece, and after passing through a fixed pulley, it is connected to a spring. During the test, the hydraulic servo actuator simulates loading according to the load closed-loop control, and large displacements are quickly compensated by the spring.

7. The method according to claim 6, characterized in that, The fixed mounting bracket has two fixed pulley mounting sections. After the steel wire rope passes through the first and second fixed pulleys, it is connected to the spring.

8. The method according to claim 6, characterized in that, The spring is connected to the hydraulic servo actuator via a steel wire rope.

9. The method according to claim 7, characterized in that, Two fixed pulleys are fixed on the fixed mounting frame according to the relationship between the loading load angle, the loading load magnitude and the test piece position.

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