Two-degree-of-freedom adjustable equipment for thrust test

Abstract

The invention discloses two-degree-of-freedom adjustable equipment for thrust testing. The two-degree-of-freedom adjustable equipment comprises a rotating seat, a lateral attitude plate, a lateral driving mechanism, a heading attitude plate and a heading driving mechanism. One end of the lateral posture plate is hinged to the rotating base. The lateral driving mechanism is in transmission fit with the lateral posture plate and drives the lateral posture plate to rotate around the first axis. And the heading attitude plate is rotatably connected to the lateral attitude plate and is used for mounting a propelling device. The heading driving mechanism is arranged on the lateral posture plate and is in transmission fit with the heading posture plate so as to drive the heading posture plate to rotate around the second axis. Wherein an included angle is formed between the first axis and the second axis. According to the invention, the course and lateral installation attitude of the distributed propulsion device can be accurately simulated, the propulsion device can be completely matched with the actual on-board installation attitude during the ground test, the thrust test is ensured to fit the real situation, the accuracy of the test data is improved, and a reliable basis is provided for the performance evaluation of the power system of the distributed electric propulsion aircraft.

Description

Technical Field

[0001] This invention relates to the field of ground thrust testing technology for aero-engines, and specifically to a two-degree-of-freedom adjustable device for thrust testing. Background Technology

[0002] As the core power unit of an aircraft, the thrust performance of the aero-engine directly determines the aircraft's flight safety, economy, and maneuverability. Therefore, performance testing on a thrust test bench before engine integration is an indispensable and crucial step in the development of aero-equipment. This thrust test needs to simulate the engine's actual operating conditions and accurately measure thrust parameters. The way the engine is fixed on the thrust test bench directly affects the accuracy and reliability of the test data.

[0003] Traditional aero engines (such as turbojet and turbofan engines) are mostly single-engine or twin-engine centralized layouts, with their mounting axis basically parallel to the aircraft fuselage axis. During thrust testing, a horizontal four-point fixing structure is typically used, where the engine is fixed to the thrust test bench via four horizontal supports symmetrically distributed along the engine axis. This horizontal mounting configuration simulates the actual stress conditions experienced after installation on an aircraft, and the four-point fixing structure provides stable support stiffness, effectively counteracting the axial thrust and radial vibration generated during engine operation. This meets the testing requirements of traditional engines and has therefore been widely used in the field of aero engine testing.

[0004] As aviation technology develops towards greener and more efficient directions, distributed electric propulsion aircraft have become an important development direction in the field of new energy aviation due to their significant advantages in aerodynamic efficiency, noise control, and safety. The core feature of this type of aircraft is the arrangement of multiple ducted fan propulsion devices on the wings, optimizing the overall aerodynamic performance through the coordinated operation of multiple power sources. However, in the aerodynamic design process of distributed electric propulsion aircraft, it has been found that adopting a non-horizontal mounting method for the ducted fan propulsion devices—that is, giving them specific directional attitude angles (installation angles along the flight direction) and lateral attitude angles (installation angles perpendicular to the flight direction)—can effectively improve the airflow distribution on the wing surface, reduce induced drag, and improve the aerodynamic coupling efficiency between the propulsion system and the wing, thereby optimizing the aircraft's lift-to-drag ratio and range performance. This has become a key technical means in the aerodynamic design of distributed electric propulsion aircraft.

[0005] However, current thrust testing fixtures for aero-engines are based on the horizontal mounting requirements of traditional engines, only capable of fixing the engine in a horizontal position. This fails to meet the simulation requirements for the installation of ducted fan propulsion systems in distributed electric propulsion aircraft, which require both yaw and lateral attitude angles. Directly using existing horizontal four-point fixing devices during testing would result in inconsistencies between the propulsion system's mounting attitude and its actual onboard attitude. This would prevent the thrust test data from accurately reflecting the aircraft's actual performance, thus affecting the accurate evaluation of the distributed electric propulsion aircraft's power system performance and hindering its development. Therefore, there is an urgent need to design a thrust testing device suitable for distributed electric propulsion aircraft.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] This invention provides a two-degree-of-freedom adjustable device for thrust testing.

[0008] This application provides the following technical solution: A two-degree-of-freedom adjustable device for thrust testing, comprising: Rotary seat; A lateral attitude plate, one end of which is hinged to the rotating base; A lateral drive mechanism is provided, which is in transmission cooperation with the lateral attitude plate to drive the lateral attitude plate to rotate around a first axis; A heading attitude plate, rotatably connected to the lateral attitude plate, the heading attitude plate being used to mount a propulsion device; A heading drive mechanism is disposed on the lateral attitude plate and is in transmission cooperation with the heading attitude plate to drive the heading attitude plate to rotate around the second axis; The first axis and the second axis have an included angle.

[0009] Optionally, the lateral drive mechanism includes a fixed base, a nut, and a lead screw; The nut is disposed on the fixing base; The lead screw is threaded to the nut and is movably connected to the lateral attitude plate. Under the action of external force, the lead screw rotates and can move along the nut, pushing the lateral attitude plate to rotate around the first axis.

[0010] Optionally, the two-degree-of-freedom adjustable device for thrust testing includes a connecting seat, which is hinged to the side of the lateral attitude plate opposite to the rotating seat. The end of the lead screw is rotatably connected to the connecting seat.

[0011] Optionally, the mounting base has two lugs; The nut is located between the two lugs and is rotatably connected to the lugs; As the lead screw moves along the nut, the nut rotates accordingly.

[0012] Optionally, a shaft hole is provided on the lug; The nut component has protruding shafts on its opposite sides, and the two protruding shafts are rotatably connected to corresponding shaft holes.

[0013] Optionally, the two-degree-of-freedom adjustable device for thrust testing includes a locking element; The nut has a threaded groove and a locking groove that communicates with the threaded groove. The threaded groove and the locking groove are perpendicular to each other. The lead screw is threaded to the threaded groove. The locking groove has internal threads; The locking member has an external thread, the locking member is threadedly connected to the locking groove, and the end of the locking member abuts against the lead screw.

[0014] Optionally, the fixing base includes a base plate, and an elongated groove is formed on the base plate; Both lugs are connected to the base plate and are located on both sides of the elongated groove; The lead screw passes through the elongated groove.

[0015] Optionally, the lateral drive mechanism includes a handwheel; The handwheel is connected to the lead screw.

[0016] Optionally, the heading drive mechanism includes a support, a long beam, and a telescopic component; The support is connected to the lateral attitude plate; The long beam is connected to the heading attitude plate; One end of the long beam is hinged to the support; One end of the telescopic member is hinged to the support, and the other end is hinged to the other end of the long beam; The telescopic movement of the telescopic component can drive the heading attitude plate to rotate around the second axis.

[0017] Optionally, the two-degree-of-freedom adjustable device for thrust testing includes multiple heading drive mechanisms; Each of the heading drive mechanisms is arranged at intervals along the length direction of the lateral attitude plate.

[0018] By adopting the above technical solution, this application has the following beneficial effects: This application can accurately simulate the heading and lateral installation attitude of a distributed propulsion device, enabling the propulsion device to perfectly match the actual in-flight installation attitude during ground testing. This ensures that the thrust test closely matches the real situation, improves the accuracy of the test data, and provides a reliable basis for the performance evaluation of distributed electric propulsion aircraft power systems. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a two-degree-of-freedom adjustable device for thrust testing provided in an embodiment of the present invention; Figure 2 A schematic diagram of the heading drive mechanism of a two-degree-of-freedom adjustable device for thrust testing provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the lateral drive mechanism, handwheel, and locking component of the two-degree-of-freedom adjustable device for thrust testing provided in an embodiment of the present invention.

[0021] In the diagram: 1. Rotary seat; 2. Lateral attitude plate; 3. Lateral drive mechanism; 31. Fixed seat; 311. Lug; 3111. Shaft hole; 312. Base plate; 3121. Nut; 32. Shaft; 321. Lead screw; 33. Yaw attitude plate; 4. Yaw drive mechanism; 5. Support; 51. Long beam; 52. Telescopic component; 53. Connecting seat; 6. Double-ear rotating shaft base; 61. Single-ear rotating shaft base; 62. Locking component; 7. Handwheel; 8. Connecting part; 81. Handle part; 82. Ring part; 83. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] See Figures 1 to 3 As shown in the illustration, this application provides a two-degree-of-freedom adjustable device for thrust testing, comprising: a rotating base 1, a lateral attitude plate 2, a lateral drive mechanism 3, a yaw attitude plate 4, and a yaw drive mechanism 5. One end of the lateral attitude plate 2 is hinged to the rotating base 1. The lateral drive mechanism 3 is in a transmission cooperation with the lateral attitude plate 2, driving the lateral attitude plate 2 to rotate around a first axis. The yaw attitude plate 4 is rotatably connected to the lateral attitude plate 2 and is used to mount a propulsion device. The yaw drive mechanism 5 is disposed on the lateral attitude plate 2 and is in a transmission cooperation with the yaw attitude plate 4 to drive the yaw attitude plate 4 to rotate around a second axis. The first axis and the second axis form an angle. The first axis and the second axis can be perpendicular, i.e., the first axis around which the lateral attitude plate 2 rotates forms a 90° angle with the second axis around which the yaw attitude plate 4 rotates. This allows the adjustments to the heading attitude angle and the lateral attitude angle to be independent of each other, more accurately matching the actual installation attitude requirements of the ducted fan propulsion device of a distributed electric propulsion aircraft, and improving the versatility and adaptability of the two-degree-of-freedom adjustable device for thrust testing in this application.

[0026] This application can accurately simulate the heading and lateral installation attitude of a distributed propulsion device, enabling the propulsion device to perfectly match the actual in-flight installation attitude during ground testing. This ensures that the thrust test closely matches the real situation, improves the accuracy of the test data, and provides a reliable basis for the performance evaluation of distributed electric propulsion aircraft power systems.

[0027] In one possible implementation, the lateral drive mechanism 3 includes a fixed base 31, a nut 32, and a lead screw 33. The nut 32 is disposed on the fixed base 31, and the lead screw 33 is threadedly connected to the nut 32 and movably connected to the lateral attitude plate 2. Under the action of an external force, the lead screw 33 rotates and can move along the nut 32, pushing the lateral attitude plate 2 to rotate around the first axis. When the lead screw 33 rotates, it converts the rotational motion into linear motion through the threaded engagement with the nut 32, pushing the lateral attitude plate 2 to rotate flexibly around the first axis.

[0028] In one possible implementation, the two-degree-of-freedom adjustable device for thrust testing includes a connecting seat 6, which is hinged to the side of the lateral attitude plate 2 facing away from the rotating base 1. The end of the lead screw 33 is rotatably connected to the connecting seat 6. The connecting seat 6 includes a double-eared rotating shaft base 61 and a single-eared rotating shaft base 62. The single-eared rotating shaft base 62 is provided with a bearing outer ring. One end of the double-eared rotating shaft base 61 is fixedly connected to the side of the lateral attitude plate 2 facing away from the rotating base 1, and the other end is connected to the single-eared rotating shaft base 62. The end of the lead screw 33 is engaged with the inner and outer rings of the bearing in the single-eared rotating shaft base 62, allowing flexible rotation between the double-eared rotating shaft base 61 and the single-eared rotating shaft base 62.

[0029] The fixed base 31 has two lugs 311, and the nut 32 is located between the two lugs 311 and is rotatably connected to the lugs 311. During the movement of the lead screw 33 along the nut 32, the nut 32 rotates accordingly, reducing the transmission friction and stress loss between the lead screw and the nut 32, improving the stability and accuracy of the attitude adjustment of the lateral drive mechanism 3, and enhancing the stability and service life of the overall structure.

[0030] The lug 311 is provided with a shaft hole 3111, and the nut 32 is provided with a convex shaft 321 on each of its opposite sides. The two convex shafts 321 are rotatably connected to the corresponding shaft hole 3111, so that the nut 32 can be stably installed and flexibly rotated on the fixed seat 31, reducing transmission jamming and wear, improving the stability and accuracy of the attitude adjustment of the lateral drive mechanism 3, and ensuring the reliable operation of the equipment.

[0031] In one possible implementation, the two-degree-of-freedom adjustable device for thrust testing includes a locking member 7. The nut 32 has a threaded groove and a locking groove communicating with the threaded groove. The threaded groove and the locking groove are perpendicular. The lead screw 33 is threadedly connected to the threaded groove. The locking groove has an internal thread, and the locking member 7 has an external thread. The locking member 7 is threadedly connected to the locking groove, and its end abuts against the lead screw 33. After adjusting the lateral attitude angle, the locking member 7 is screwed in so that its end abuts against the side of the lead screw, fixing the lead screw to prevent it from rotating relative to the nut 32. This securely maintains the adjusted attitude angle, effectively preventing attitude deviation caused by accidental movement of the lead screw during testing, improving the stability and accuracy of the thrust test. Furthermore, the locking member 7 has a simple structure, is easy to operate, does not affect the flexibility of the device's attitude adjustment, and ensures the reliable conduct of the thrust test.

[0032] The fixed base 31 includes a base plate 312, on which an elongated groove 3121 is formed. Two lugs 311 are connected to the base plate 312 and are respectively located on both sides of the elongated groove 3121. The lead screw 33 passes through the elongated groove 3121. This can effectively avoid the movement trajectory of the lead screw during the adjustment process, avoid interference between the lead screw and the fixed base 31, ensure smooth movement of the lead screw and stable adjustment of the lateral attitude plate 2, thereby improving the reliability and smoothness of the attitude adjustment of the entire device, while simplifying the structural design and enhancing the rationality of the mechanism layout.

[0033] In one possible implementation, the lateral drive mechanism 3 includes a handwheel 8 connected to the lead screw 33. The handwheel 8 includes a connecting portion 81, a handle portion 82, and a ring portion 83. One end of the connecting portion 81 is fixedly connected to the ring portion 83. The handle portion 82 is located on the side of the ring portion 83 opposite to the connecting portion 81 and is perpendicular to the ring portion 83, making the handle portion 82 convenient for gripping and operation. The end of the lead screw opposite to the fixed base 31 is connected to the connecting portion 81. The connecting portion 81 has a bearing inner ring, and the end of the lead screw is connected to the bearing inner ring. When the operator grips the handle portion 82 and rotates the ring portion 83, the connecting portion 81 can drive the lead screw to rotate synchronously, thereby driving the lateral attitude plate 2 to move smoothly around the first axis. The handwheel 8 allows for precise manual control of the lead screw rotation without the need for additional power equipment. This not only makes the adjustment of the lateral posture more convenient and labor-saving, but also allows for precise control of the lead screw's rotation amplitude to improve the accuracy of the lateral posture adjustment. At the same time, the handwheel 8 has a simple structure, is easy to install and maintain, and enhances the operational flexibility and ease of use of the entire device, ensuring the efficient and accurate conduct of thrust testing.

[0034] In one possible implementation, the heading drive mechanism 5 includes a support 51, a long beam 52, and a telescopic member 53. The support 51 is connected to the lateral attitude plate 2, and the long beam 52 is connected to the heading attitude plate 4. One end of the long beam 52 is hinged to the support 51, and one end of the telescopic member 53 is hinged to the support 51, while the other end is hinged to the other end of the long beam 52. The telescopic member 53 extends and retracts, driving the heading attitude plate 4 to rotate around a second axis. This allows for stable and precise adjustment of the heading attitude. The structure is uniformly stressed, effectively transmitting driving force and avoiding transmission jamming. Furthermore, it eliminates the need for complex transmission components, resulting in a simple structure with high reliability. The heading attitude angle can be flexibly adjusted according to testing requirements, adapting to the working conditions of multi-attitude thrust testing of propulsion devices.

[0035] The two-degree-of-freedom adjustable device for thrust testing includes multiple yaw drive mechanisms 5, which are arranged sequentially and at intervals along the length of the lateral attitude plate 2. This makes the force on the yaw attitude plate 4 more uniform during adjustment, avoiding deformation or adjustment jamming of the lateral attitude plate 2 caused by single-point drive, and improving the stability and accuracy of yaw attitude adjustment. At the same time, the coordinated drive of multiple yaw drive mechanisms 5 can enhance load capacity, adapt to the testing requirements of different specifications of propulsion devices, and ensure the operational reliability and working condition adaptability of the entire thrust testing equipment.

[0036] The preferred embodiments disclosed above are merely illustrative of this application. These preferred embodiments do not exhaustively describe all details, nor do they limit the application to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A two-degree-of-freedom adjustable device for thrust testing, characterized in that, include: Rotary seat; A lateral attitude plate, one end of which is hinged to the rotating base; A lateral drive mechanism is provided, which is in transmission cooperation with the lateral attitude plate to drive the lateral attitude plate to rotate around a first axis; A heading attitude plate, rotatably connected to the lateral attitude plate, the heading attitude plate being used to mount a propulsion device; A heading drive mechanism is disposed on the lateral attitude plate and is in transmission cooperation with the heading attitude plate to drive the heading attitude plate to rotate around the second axis; The first axis and the second axis have an included angle.

2. The two-degree-of-freedom adjustable device for thrust testing according to claim 1, characterized in that, The lateral drive mechanism includes a fixed base, a nut, and a lead screw; The nut is disposed on the fixing base; The lead screw is threaded to the nut and is movably connected to the lateral attitude plate. Under the action of external force, the lead screw rotates and can move along the nut, pushing the lateral attitude plate to rotate around the first axis.

3. The two-degree-of-freedom adjustable device for thrust testing according to claim 2, characterized in that, Includes a connecting seat, which is hinged to the side of the lateral attitude plate opposite to the rotating seat; The end of the lead screw is rotatably connected to the connecting seat.

4. The two-degree-of-freedom adjustable device for thrust testing according to claim 3, characterized in that, The mounting base has two lugs; The nut is located between the two lugs and is rotatably connected to the lugs; As the lead screw moves along the nut, the nut rotates accordingly.

5. The two-degree-of-freedom adjustable device for thrust testing according to claim 4, characterized in that, The lug is provided with a shaft hole; The nut has protruding shafts on its opposite sides, and the two protruding shafts are rotatably connected to corresponding shaft holes.

6. The two-degree-of-freedom adjustable device for thrust testing according to claim 5, characterized in that, Including locking components; The nut has a threaded groove and a locking groove that communicates with the threaded groove. The threaded groove and the locking groove are perpendicular to each other. The lead screw is threaded to the threaded groove. The locking groove has internal threads; The locking member has an external thread, the locking member is threadedly connected to the locking groove, and the end of the locking member abuts against the lead screw.

7. The two-degree-of-freedom adjustable device for thrust testing according to claim 6, characterized in that, The mounting base includes a base plate, and an elongated groove is formed on the base plate; Both lugs are connected to the base plate and are located on both sides of the elongated groove; The lead screw passes through the elongated groove.

8. The two-degree-of-freedom adjustable device for thrust testing according to claim 2, characterized in that, The lateral drive mechanism includes a handwheel; The handwheel is connected to the lead screw.

9. The two-degree-of-freedom adjustable device for thrust testing according to claim 1, characterized in that, The heading drive mechanism includes a support, a long beam, and a telescopic component; The support is connected to the lateral attitude plate; The long beam is connected to the heading attitude plate; One end of the long beam is hinged to the support; One end of the telescopic member is hinged to the support, and the other end is hinged to the other end of the long beam; The telescopic movement of the telescopic component can drive the heading attitude plate to rotate around the second axis.

10. The two-degree-of-freedom adjustable device for thrust testing according to claim 9, characterized in that, Includes multiple heading drive mechanisms; Each of the heading drive mechanisms is arranged at intervals along the length direction of the lateral attitude plate.

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