Multi-degree-of-freedom automatic precise mounting device for large-bypass-ratio engine process nacelle

Abstract

The invention provides a large-bypass-ratio engine process nacelle multi-degree-of-freedom automatic precise installation device which is used for installing a replaceable nacelle and comprises a four-wheel omnidirectional chassis, a plurality of supporting rods and a plurality of supporting rods. The three-degree-of-freedom precise displacement device is arranged on the four-wheel omnidirectional chassis; and the pitching adjusting device is arranged on the three-degree-of-freedom precise displacement device and can move along with the three-degree-of-freedom precise displacement device, and the pitching adjusting device is connected with the replaceable nacelle through a clamp. The multi-degree-of-freedom automatic precise mounting device for the large-bypass-ratio engine process nacelle can realize automation to a certain degree, is simple and convenient to operate, requires few personnel for operation, is convenient to mount, has high mounting precision, and can meet the requirement of a high-altitude cabin for mounting the process nacelle.

Description

Technical Field

[0001] The present invention relates to the technical field of aero engines, and particularly to a multi-degree-of-freedom automatic precise installation device for a process nacelle of a high-bypass ratio engine. Background Art

[0002] A high-bypass ratio engine usually forms a power plant of an aircraft together with an air intake, a fan cowl, and a thrust reverser. Among them, most of the thrust of the engine is generated by the outer bypass duct formed by the thrust reverser. The thrust reverser has a complex structure, numerous mechanisms, and a high cost. Therefore, during the ground test of the engine, a process nacelle without a thrust reversal function is usually used to replace the thrust reverser to form the outer bypass flow path of the engine, ensuring the smooth progress of the ground test of the engine. As an essential item for the high-altitude simulation test of a high-bypass ratio engine, the installation of the process nacelle on the altitude test stand has always been quite difficult. In previous tests, due to the semi-closed structure of the altitude test stand or the limited installation space of the pre-installation station, the overhead crane could not be used well, and people needed to use a series of chain hoists for hoisting. This hoisting method is not only laborious, difficult to install, and has low installation accuracy, but also has certain safety hazards. Summary of the Invention

[0003] In view of this, the present invention provides a multi-degree-of-freedom automatic precise installation device for a process nacelle of a high-bypass ratio engine to achieve the purpose of improving the installation accuracy and efficiency.

[0004] The present invention provides the following technical solutions: A multi-degree-of-freedom automatic precise installation device for a process nacelle of a high-bypass ratio engine, used for installing a replaceable nacelle, includes: a four-wheel omnidirectional chassis; a three-degree-of-freedom precise displacement device disposed on the four-wheel omnidirectional chassis; a pitch adjustment device disposed on the three-degree-of-freedom precise displacement device and capable of moving with the three-degree-of-freedom precise displacement device, and the pitch adjustment device is connected to the replaceable nacelle through a fixture.

[0005] Compared with the prior art, the at least one technical solution adopted by the present invention can achieve at least the following beneficial effects:

[0006] 1. The installation bracket of the process nacelle can be disassembled from the pitchable main beam to meet the installation and use requirements of different types of engine nacelles. At the same time, the short cabin connecting trunnion of the installation bracket uses a T-shaped quick pin to achieve the quick installation and disassembly of the short cabin.

[0007] 2. The chassis is of a Mecanum wheel structure, which can meet the rapid omnidirectional movement of the device on the factory floor.

[0008] 3. The precise moving platform is equipped with three-direction adjustment electric cylinders, which can stably and precisely achieve the three-degree-of-freedom adjustment function of the moving platform. At the same time, the moving platform is also equipped with a threaded installation surface, which is convenient for other functional transformations of the overall device in the later stage.

[0009] 4. The Z - direction adjustment of the precise movement platform adopts a double six - link structure, which can not only meet the height - direction limitations of the platform but also meet the ability to adjust the large load of the platform.

[0010] 5. This device uses wireless remote control and wired remote control methods. At the same time, infrared sensors are arranged around the chassis to stop the vehicle when touching foreign objects, which improves both the convenience of manual operation and the safety of the device operation. Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of the three - degree - of - freedom precise displacement device;

[0014] Figure 3 It is a schematic diagram of the structure of the fixture;

[0015] Figure 4 It is a schematic diagram of the structure of the four - wheel omnidirectional chassis;

[0016] Figure 5 It is a partial enlarged view of the fixture.

[0017] Reference numerals in the drawings: 1. Fixture; 11. Nacelle mounting section; 12. Quick - release pin; 13. Connecting cross - beam; 2. Pitch adjustment device; 21. Pitch mechanism mounting main beam; 22. Pitch adjustment power device; 23. Pitch adjustment device mounting base; 3. Three - degree - of - freedom precise displacement device; 31. Z - direction displacement adjustment component; 32. Y - direction displacement adjustment device; 33. Upper mounting substrate; 34. X - direction displacement adjustment component; 35. Bottom mounting base; 4. Four - wheel omnidirectional chassis; 41. Chassis frame; 42. Servo motor; 43. Wheel suspension mechanism; 44. Wheels; 45. Lifting lug. Detailed Embodiments

[0018] The following will describe the embodiments of the present application in detail with reference to the drawings.

[0019] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.

[0020] Embodiment 1:

[0021] As Figures 1 to 5 shown, the embodiment of the present invention provides a multi-degree-of-freedom automatic precise installation device for a large bypass ratio engine process nacelle, including a four-wheel omnidirectional chassis 4, a three-degree-of-freedom precise displacement device 3, a pitch adjustment device 2, and a fixture 1. The four-wheel omnidirectional chassis 4 serves as a moving carrier. The three-degree-of-freedom precise displacement device 3 is fixed to the chassis frame 41 by bolts. The pitch adjustment device 2 is installed on the upper mounting substrate 33 of the three-degree-of-freedom precise displacement device 3, and the replaceable nacelle is clamped by the fixture 1.

[0022] The specific structure of the four-wheel omnidirectional chassis 4:

[0023] The chassis frame 41 is formed by welding high-strength aluminum alloy. Four groups of servo motors 42 are symmetrically arranged inside. The output shafts of the motors are connected to the wheels 44 through couplings. The wheels 44 are connected to the chassis frame 41 by a wheel suspension mechanism 43. The servo motors 42 adopt closed-loop control and cooperate with encoders to achieve millimeter-level movement accuracy. Lifting lugs 45 are provided at the four corners of the chassis frame 41. The material is 40Cr alloy steel, which can withstand a lifting load of more than 5 tons.

[0024] Among them, the wheels 44 are Mecanum wheels.

[0025] The implementation manner of the three-degree-of-freedom precise displacement device 3:

[0026] The bottom mounting base 35 is fixedly connected to the chassis frame 41 through a positioning pin. The displacement adjustment device includes an X / Y / Z three-axis linkage mechanism:

[0027] The X-direction displacement adjustment component 34: It is composed of a ball screw and a linear guide rail. The two ends of the screw are supported by angular contact bearings and driven by a servo motor. The stroke is ±500 mm, and the repeat positioning accuracy is ±0.02 mm.

[0028] Y-direction displacement adjustment device 32: It has the same structure as the X-axis, is vertically arranged above the X-axis, and realizes the linkage of the XY plane through the intermediate substrate.

[0029] Z-direction displacement adjustment component 31: An electric cylinder is used and connected to the upper mounting substrate 33 through a flange to achieve vertical lifting.

[0030] Working mode of the pitch adjustment device 2:

[0031] The mounting base 23 of the pitch adjustment device is fixed to the upper mounting substrate 33 through high-strength bolts. One end of the main beam 21 of the pitch mechanism is hinged to the mounting base 23 of the pitch adjustment device through a hinge pin shaft, and the other end is connected to the fixture 1 through a quick-change interface. The pitch adjustment power device 22 uses a double-acting hydraulic cylinder. The tail of the cylinder body is hinged to the mounting base 23 of the pitch adjustment device, and the end of the piston rod is connected to the outside of the main beam 21 of the pitch mechanism through a spherical joint, which can provide a pitch angle adjustment of ±15°, and the angle resolution is 0.1°.

[0032] Adapter design of the fixture 1:

[0033] The fixture 1 adopts a modular structure, including a pneumatic jaw and an adaptive positioning module. The clamping force can be adjusted by air pressure, and the clamping surface is covered with a polyurethane anti-slip layer, which is suitable for the flange interfaces of different models of nacelles. The fixture 1 is connected to the nacelle through the nacelle mounting section 11, the quick plug 12 and the connecting cross beam 13.

[0034] Workflow:

[0035] Moving and positioning: Through the omnidirectional movement characteristics of the wheels 44, the device is translated to the engine installation station, and the laser positioning system is used to assist in deviation correction;

[0036] Coarse positioning: The three-degree-of-freedom device drives the nacelle to the target area, the X / Y axes cooperate to position the plane coordinates, and the Z axis is lifted to the docking height;

[0037] Fine adjustment and alignment: The pitch adjustment device 2 finely adjusts the inclination angle of the nacelle, and the force sensor real-time feedbacks the contact pressure until it is completely matched with the engine interface;

[0038] Locking and installation: The pneumatic fixture releases the nacelle, and the automatic locking bolts complete the fixation, and the device withdraws from the working area.

[0039] Technical effect:

[0040] Through the coordinated control of the omnidirectional chassis and multi-degree-of-freedom adjustment, the installation and positioning accuracy of the nacelle of this device is improved to ±0.1 mm, the angle deviation ≤ 0.5°, and the installation efficiency is more than 3 times higher than that of manual operation, which is especially suitable for high-precision assembly operations in narrow spaces.

[0041] Embodiment 2:

[0042] Alternative implementation manners can be supplemented according to the actual application scenarios. For example, a six-axis robotic arm can be used to replace the three-degree-of-freedom device, or an electric push rod can be used to replace the hydraulic cylinder, etc.

[0043] As mentioned above, the above are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the technical field of the present application within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An automated precise installation device with multiple degrees of freedom for the process nacelle of a high bypass ratio engine, which is used to install a replaceable nacelle, is characterized in that Including: Four-wheel omnidirectional chassis (4); Three-degree-of-freedom precise displacement device (3), arranged on the four-wheel omnidirectional chassis (4); Pitch adjustment device (2), arranged on the three-degree-of-freedom precise displacement device (3) and capable of moving along with the three-degree-of-freedom precise displacement device (3), and the pitch adjustment device (2) is connected to the replaceable nacelle through a clamp (1).

2. The multi-degree-of-freedom automatic precise installation device for the large bypass ratio engine process nacelle according to claim 1, characterized in that, The pitch adjustment device (2) includes: Pitch adjustment device mounting base (23), fixedly mounted on the three-degree-of-freedom precise displacement device (3); Pitch mechanism mounting main beam (21), one end of which is hinged to the pitch adjustment device mounting base (23), and the other end of the pitch mechanism mounting main beam (21) is a movable end and is connected to the clamp (1); Pitch adjustment power device (22), one end of which is connected to the pitch adjustment device mounting base (23), and the other end of the pitch adjustment power device (22) is connected to the outer side of the pitch mechanism mounting main beam (21).

3. The multi-degree-of-freedom automatic precise installation device for the large bypass ratio engine process nacelle according to claim 2, wherein The three-degree-of-freedom precise displacement device (3) includes: Bottom mounting base (35); Displacement adjustment device, the lower end of which is fixedly arranged on the bottom mounting base (35); Upper mounting substrate (33), connected to the upper end of the displacement adjustment device, and the pitch adjustment device mounting base (23) is connected to the upper mounting substrate (33).

4. The multi-degree-of-freedom automatic precise installation device for the nacelle of a high-bypass ratio engine according to claim 3, characterized in that, The displacement adjustment device includes: Intermediate substrate; X-direction displacement adjustment component (34) and Y-direction displacement adjustment device (32), both fixedly arranged on the bottom mounting base (35), and the intermediate substrate is connected to both the X-direction displacement adjustment component (34) and the Y-direction displacement adjustment device (32) and can perform displacements in the X-direction and Y-direction; Z-direction displacement adjustment component (31), arranged on the intermediate substrate and connected to the upper mounting substrate (33).

5. The multi-degree-of-freedom automatic precise installation device for the large bypass ratio engine process nacelle according to claim 4, characterized in that, The four-wheel omnidirectional chassis (4) includes a chassis frame (41), a servo motor (42) and wheels (44), the three-degree-of-freedom precise displacement device (3) is arranged on the chassis frame (41), and the servo motor (42) is arranged inside the chassis frame (41) and is used to drive the wheels (44) to rotate.

6. The multi-degree-of-freedom automatic precise installation device for the large bypass ratio engine process nacelle according to claim 5, wherein The wheels (44) are Mecanum wheels.

7. The multi-degree-of-freedom automatic precise installation device for the nacelle of a high bypass ratio engine process according to claim 5, characterized in that Lifting lugs (45) are arranged on the chassis frame (41).

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