A tilt-rotor cropped-wing static test device

Abstract

The utility model discloses a tilt rotor short piece static test device in the technical field of rotor static test, including mounting seat, is seted up with the mounting slide rail on the mounting seat, the detachable connection of supporting frock is had on the mounting seat, is provided with the connecting assembly on the supporting frock, the connecting assembly is used to install the rotor short piece, the connecting assembly adopts the modularization setting, is provided with the loading frock on the mounting seat, the fixed mounting of actuator is installed on the loading frock. The utility model discloses the test bench is decomposed as general mounting seat and exclusive modularization connecting piece. The mounting seat is equipped with the standardization slide rail, and the supporting frock can be positioned quickly. When replacing the model, the whole heavy frock need not be remade, and only need to replace the connecting assembly. This realizes the decoupling of core skeleton and test object, maximizes the reuse of expensive base and loading system, greatly reduces the research and development cost and period, and is the key technical breakthrough of improving platform adaptability and economy.

Description

Technical Field

[0001] This utility model relates to the field of rotor static testing technology, and in particular to a static testing device for a tilting rotor truncated section. Background Technology

[0002] Tiltrotor technology is an aircraft technology that combines the vertical takeoff and landing (VTOL) capabilities of helicopters with the high-speed cruise capabilities of fixed-wing aircraft. This technology uses rotor tilting to allow the aircraft to switch between VTOL, hovering, and high-speed cruise, thus combining the advantages of both flight modes. Despite its many advantages, tiltrotor technology is challenging to develop. Therefore, testing is crucial, and the results of static tests are essential for aircraft design improvement and optimization. These tests can identify potential design flaws and allow for corrective measures. For example, in the development of tiltrotor aircraft, static tests have helped verify the rationality of the structural design and laid the foundation for subsequent flight tests.

[0003] However, in order to adapt to a specific model of tilt rotor, the existing test benches usually adopt an integrated or highly integrated mechanical structure. The connection between the test bench and the test piece, the force transmission path, etc. are often designed and processed in one go according to the unique shape, size and interface characteristics of the rotor model. This makes each model require corresponding tooling, resulting in the test bench itself being "non-reusable", which greatly increases the test cost. Therefore, we propose a static test device for truncated tilt rotor parts. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a static testing device for tilting rotor truncated sections. By modularizing the connecting components in the support fixture, the force transmission connectors can be flexibly replaced for different models of rotor truncated sections without redesigning or replacing the entire test bench structure. This achieves platform reuse of the test bench, significantly reducing testing costs and improving testing efficiency.

[0005] The purpose of this utility model is achieved as follows: a static testing device for a tilting rotor truncated section includes a mounting base, on which an installation slide rail is provided, and a support fixture is detachably connected to the mounting base. The support fixture is provided with a connecting component, which is used to install the rotor truncated section. The connecting component is modularly configured, and a loading fixture is provided on the mounting base. An actuator is fixedly installed on the loading fixture.

[0006] Optionally, the support fixture includes a base plate, a baffle is fixedly connected to one side of the base plate, the baffle contacts the mounting base and is used to position the support fixture, a connecting plate is fixedly connected to the base plate, and the connecting assembly is mounted on the connecting plate.

[0007] Optionally, a rib is fixedly connected between one side of the connecting plate and the base plate, and a reinforcing rib is fixedly connected between the other side of the connecting plate and the base plate.

[0008] Optionally, the connecting assembly includes a connecting probe beam and a force-transmitting connector. The connecting probe beam is fixedly connected to a connecting plate, and a pad is fixedly connected to the connecting probe beam. The pad is used to unload the weight of the force-transmitting connector.

[0009] Optionally, a limiting pin is provided between the connecting probe beam and the force transmission connector. Both the connecting probe beam and the force transmission connector are provided with through holes. Bushings are provided at both ends of the through holes. There are multiple through holes, which are evenly distributed. The through holes are connected to the rotor truncated part by bolts.

[0010] Optionally, a force sensor is provided on the actuator, an adapter is fixedly connected to the output end of the actuator, and a steel wire rope is provided between the adapter and the force transmission connector.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By deconstructing the test rig into a highly versatile mounting base and dedicated modular connection components, the mounting base features standardized mounting rails, enabling tooling to be quickly and accurately positioned and installed. When dealing with different models of rotor truncated parts, there is no need to remanufacture a complete set of bulky and expensive dedicated tooling; only the matching connection components need to be replaced. This decouples the core framework of the test rig from the test object, maximizing the reuse of the expensive base and loading system. This fundamentally changes the traditional "one model, one test, one dedicated" model, reducing the initial investment and preparation time for new model development. It is a key technological breakthrough in improving the adaptability and economy of the test platform.

[0012] 2. In terms of structural design, the connecting plate and the base plate of the supporting tooling form a stable triangular structure through ribs and stiffeners, ensuring that the deformation of the supporting structure itself is minimal under huge test loads, thus guaranteeing the accuracy and reliability of the force transmission path. Secondly, in the design of the loading system, a flexible force transmission method using steel wire rope and adapter is adopted, which solves the problem of limited operating space caused by the complex structure of the rotor truncated part, and can simulate a variety of complex load conditions. Finally, closed-loop control of the load is achieved through force sensors, combined with real-time strain monitoring, to ensure high accuracy of test data and reliability of test results. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a static testing device for a tilting rotor truncated section provided by this utility model.

[0015] Figure 2 This is a schematic diagram of the support fixture structure of a static testing device for a tilting rotor truncated section provided by this utility model.

[0016] Figure 3 This is a schematic diagram of the loading fixture structure of a static testing device for a tilting rotor truncated section provided by this utility model.

[0017] In the diagram: 1. Support fixture; 2. Connecting assembly; 3. Force transmission connector; 4. Wire rope; 5. Adapter; 6. Force sensor; 7. Actuator; 8. Loading fixture; 9. Mounting base; 10. Bushing; 11. Through hole; 12. Limit pin; 13. Baffle; 14. Base plate; 15. Rib; 16. Connecting plate; 17. Connecting probe beam; 18. Spacer block; 19. Reinforcing rib. Detailed Implementation

[0018] 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.

[0019] like Figures 1 to 3 The static testing device for a tilting rotor truncated section shown includes a mounting base 9, on which an installation slide rail is provided. A support fixture 1 is detachably connected to the mounting base 9. A connecting component 2 is provided on the support fixture 1. The connecting component 2 is used to install the rotor truncated section. The connecting component 2 adopts a modular design. A loading fixture 8 is provided on the mounting base 9. An actuator 7 is fixedly installed on the loading fixture 8.

[0020] Furthermore, by deconstructing the test bench into a universal mounting base 9 and a dedicated connection module, when different models of rotor truncated parts need to be replaced for testing, it is no longer necessary to redesign and manufacture a complete set of special tooling for each model as in traditional technology. Only the appropriate modular connection component 2 needs to be replaced for the new model. This allows the core structure of the test bench to be highly reused, greatly reducing the manufacturing cost and preparation cycle of a single test. Secondly, this design not only improves the asset utilization rate of the test bench and shortens the R&D iteration cycle, but its standardized slide rail interface also ensures the support for the rapid and accurate positioning and installation of tooling 1, ensuring the stability and reliability of the test load path. Thus, while reducing costs, it does not sacrifice the accuracy and safety of the test, achieving an effective balance between economy and high performance.

[0021] It should be noted that strain gauges need to be attached to the critical section before the test begins, with the working and non-working surfaces symmetrically attached. The strain gauges are monitored in real time throughout the static test using a strain gauge and a computer. After the static test, the strain curve is analyzed to determine whether the test specimen has passed the static test.

[0022] Specifically, the support fixture 1 includes a base plate 14, a baffle 13 is fixedly connected to one side of the base plate 14, the baffle 13 contacts the mounting base 9 and is used to position the support fixture 1, a connecting plate 16 is fixedly connected to the base plate 14, the connecting assembly 2 is installed on the connecting plate 16, a rib 15 is fixedly connected between one side of the connecting plate 16 and the base plate 14, and a reinforcing rib 19 is fixedly connected between the other side of the connecting plate 16 and the base plate 14.

[0023] Furthermore, firstly, the contact connection between the baffle 13 and the slide rail of the mounting base 9 provides a simple, reliable and highly repeatable positioning method for supporting the tooling 1. This not only ensures the consistency of the installation position each time, but also simplifies the disassembly and assembly process and saves test preparation time. Secondly, the ribs 15 and stiffeners 19 arranged together between the connecting plate 16 and the base plate 14 form a stable triangular structure, which can evenly distribute the complex bending moment and shear force generated during the test to the entire base plate 14, greatly enhancing the overall stiffness and deformation resistance of the structure. When subjected to huge test loads, the deformation of the supporting structure itself is minimal, thus ensuring the accuracy of the force transmission path.

[0024] Specifically, the connecting component 2 includes a connecting probe beam 17 and a force transmission connector 3. The connecting probe beam 17 is fixedly connected to the connecting plate 16. A pad 18 is fixedly connected to the connecting probe beam 17. The pad 18 is used to unload the weight of the force transmission connector 3. A limit pin 12 is provided between the connecting probe beam 17 and the force transmission connector 3. Both the connecting probe beam 17 and the force transmission connector 3 are provided with through holes 11. Bushings 10 are provided at both ends of the through holes 11. There are multiple through holes 11, which are evenly distributed. The through holes 11 are connected to the rotor truncated part by bolts.

[0025] Furthermore, it should be noted that both the force transmission connector 3 and the support fixture 1 are provided with round holes, and are connected by a limit pin 12 to ensure the uniqueness and stability of the load transmission path. Secondly, adding bushings 10 to both ends of the through hole 11 of the bolt connection not only greatly improves the wear resistance of the bolt hole and extends the service life of the tooling, but more importantly, as a precision guide, it ensures high-precision alignment every time the rotor clipping is disassembled or assembled, and guarantees the consistency of the connection preload. Finally, pads 18 are set to ensure that the weight of the force-transmitting connector 3 does not act on the rotor truncated section during the static test, preventing the generation of static preload and ensuring that the test piece only bears the target test load applied by the actuator 7, making the test results purer and more reliable.

[0026] Specifically, a force sensor 6 is installed on the actuator 7, an adapter 5 is fixedly connected to the output end of the actuator 7, and a steel wire rope 4 is installed between the adapter 5 and the force transmission connector 3.

[0027] Furthermore, a force sensor 6 is integrated into the actuator 7, which can measure and provide feedback on the magnitude of the applied load in real time, realize closed-loop control of the load, and ensure that the force applied to the test piece is stable and controllable, and the data acquisition is accurate and reliable. Using steel wire rope 4 as the force transmission medium, the problem of limited operating space of the rotor truncated part is solved based on its excellent flexibility. It allows the actuator 7 to perform large stroke and large angle loading movements in a relatively open position, while the steel wire rope 4 can flexibly guide the load to the loading point of the test piece, realizing accurate simulation of complex load conditions. Finally, the adapter 5 is used for force line transition and adjustment. It can smoothly connect the linear output of the actuator 7 with the flexible tension of the wire rope 4, ensuring that the load can be accurately transmitted in the preset direction, effectively avoiding the generation of off-center load and additional bending moment, and ensuring the objectivity and validity of the test results.

[0028] Working principle: During operation, firstly, strain gauges are symmetrically attached to the designated critical section of the rotor truncated section. Then, the operator securely installs the support fixture 1 onto the test bench base using the quick positioning of its baffle 13 and the slide rail of the mounting base 9. Subsequently, the modular connection assembly 2, which is specifically designed for this model, is installed on the connection plate 16 of the support fixture 1. At this time, precise guidance is achieved through the limit pin 12 on the force transmission connector 3. The rotor truncated section is then firmly fastened to the connection assembly 2 using bolts with bushings 10 at both ends. The entire dedicated load-bearing path is thus established.

[0029] After the test begins, the actuator 7 installed on the loading fixture 8 starts, and its output force is transmitted to the flexible steel wire rope 4 through the adapter 5. The steel wire rope 4 then precisely applies the tension generated by the linear motion of the actuator 7 to the force transmission connector 3. At the same time, the force sensor 6 on the actuator 7 feeds back the load data to the control system in real time to realize closed-loop control. During the test, the strain gauge continuously collected and recorded strain data at the critical section of the test piece, and displayed it in real time on the working computer; After the test, technicians analyzed the load-strain curves to make a comprehensive judgment on the structural strength and deformation of the test specimen, thereby completing a complete evaluation of its static performance.

[0030] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A static testing device for a tilting rotor truncated section, comprising a mounting base (9), characterized in that: The mounting base (9) is provided with a mounting slide rail. The mounting base (9) is detachably connected with a support fixture (1). The support fixture (1) is provided with a connecting component (2). The connecting component (2) is used to install the rotor truncated part. The connecting component (2) is modularly configured. The mounting base (9) is provided with a loading fixture (8). The loading fixture (8) is fixedly installed with an actuator (7).

2. The static testing device for a tilting rotor truncated section according to claim 1, characterized in that: The support fixture (1) includes a base plate (14), a baffle (13) is fixedly connected to one side of the base plate (14), the baffle (13) contacts the mounting base (9) and is used to position the support fixture (1), a connecting plate (16) is fixedly connected to the base plate (14), and the connecting component (2) is installed on the connecting plate (16).

3. The static testing device for a tilting rotor truncated section according to claim 2, characterized in that: A rib (15) is fixedly connected between one side of the connecting plate (16) and the bottom plate (14), and a reinforcing rib (19) is fixedly connected between the other side of the connecting plate (16) and the bottom plate (14).

4. The static testing device for a tilting rotor truncated section according to claim 1, characterized in that: The connecting assembly (2) includes a connecting probe beam (17) and a force transmission connector (3). The connecting probe beam (17) is fixedly connected to the connecting plate (16). A pad (18) is fixedly connected to the connecting probe beam (17). The pad (18) is used to unload the weight of the force transmission connector (3).

5. The static testing device for a tilting rotor truncated section according to claim 4, characterized in that: A limiting pin (12) is provided between the connecting probe beam (17) and the force transmission connector (3). Both the connecting probe beam (17) and the force transmission connector (3) are provided with through holes (11). Bushings (10) are provided at both ends of the through holes (11). There are multiple through holes (11), and the multiple through holes (11) are evenly distributed. The through holes (11) are connected to the rotor truncated piece by bolts.

6. The static testing device for a tilting rotor truncated section according to claim 1, characterized in that: A force sensor (6) is provided on the actuator (7), and an adapter (5) is fixedly connected to the output end of the actuator (7). A wire rope (4) is provided between the adapter (5) and the force transmission connector (3).

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