Disassembling and assembling device for air inlet channel of aircraft engine

Abstract

An aircraft engine air inlet channel dismounting device comprises a positioning seat, a lifting mechanism, a rotation adjusting mechanism and a pitching adjusting mechanism. The positioning seat comprises a semicircular support, a semicircular sliding groove is formed in the semicircular support, and a semicircular sliding plate is arranged in the semicircular sliding groove; and the positioning seat is rotationally mounted on the lifting mechanism. The rotary adjusting mechanism comprises a semicircular rack and a worm crank which are meshed with each other; the semicircular rack is fixedly arranged on the semicircular sliding plate of the positioning seat; and the worm crank is rotationally arranged on the positioning seat. The pitching adjusting mechanism comprises a supporting seat, and an assembling groove and a kidney-shaped sliding groove are formed in the supporting seat; a lead screw crank is further rotationally arranged on the supporting base and provided with external threads. A sliding block is arranged in the assembling groove, the two ends of the sliding block are hinged to the positioning base through hinge rods, and a screw hole in the sliding block is matched with an external thread of the lead screw crank. According to the air inlet channel dismounting and mounting device, the air inlet channel can be mounted and dismounted without cooperation of multiple persons, time and labor are saved, and the mounting efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft ground maintenance, in particular to a disassembly and assembly device for an aircraft engine air intake duct. Background Art

[0002] The aircraft engine air intake duct provides a passage for the air entering the engine and is installed at the front end of the engine. The engine air intake duct is often easily damaged by foreign objects. During the inspection, if it is found that the damage of the engine air intake duct exceeds the standard, the engine air intake duct needs to be replaced.

[0003] At present, the work of replacing the engine air intake duct mainly has the following defects:

[0004] 1. It is necessary to lift the air intake duct through the cooperation of multiple people to complete the installation and disassembly, which is time-consuming and laborious and has low efficiency;

[0005] 2. The air intake duct is relatively heavy, and improper operation is likely to cause personal injury;

[0006] 3. The special lifting tool provided by the manufacturer is relatively expensive, and the airline company cannot equip each aircraft maintenance base with a special lifting tool, resulting in the work of replacing the engine air intake duct unable to be carried out in a timely and efficient manner. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the utility model provides a disassembly and assembly device for an aircraft engine air intake duct to overcome the deficiencies in the prior art.

[0008] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0009] A disassembly and assembly device for an aircraft engine air intake duct includes a positioning seat, a lifting mechanism, a rotation adjustment mechanism, and a pitch adjustment mechanism.

[0010] The positioning seat includes a semi-circular bracket. A semi-circular sliding groove is arranged along the semi-circular arc direction on the semi-circular bracket, and a semi-circular sliding plate is slidably arranged in the semi-circular sliding groove; the positioning seat is rotatably installed on the top surface of the lifting mechanism through a pitch adjustment shaft;

[0011] The rotation adjustment mechanism includes a semi-circular rack and a worm crank that mesh with each other; the semi-circular rack is fixedly arranged on the semi-circular sliding plate of the positioning seat; the worm crank is rotatably arranged on the positioning seat, and the worm crank is provided with tooth patterns that mesh with the semi-circular rack.

[0012] Further, the pitch adjustment mechanism includes a support seat fixedly arranged on the top surface of the positioning seat. An assembly groove is arranged inside the support seat, and waist-shaped sliding grooves are symmetrically arranged on the side walls of the support seat; a screw crank is rotatably arranged on the support seat, and the end of the screw crank located in the assembly groove is provided with an external thread.

[0013] Further, a slider is also arranged in the assembly groove. Both ends of the slider penetrate through the waist-shaped sliding grooves, and both ends of the slider are hinged to the positioning seat through hinge rods.

[0014] Further, a threaded hole is arranged on the slider, and the screw rod crank passes through the threaded hole on the slider. The threaded hole on the slider is matched with the external thread of the screw rod crank.

[0015] Further, the lifting mechanism includes an upper seat and a lower seat arranged at intervals, a hydraulic actuator arranged between the upper seat and the lower seat and providing lifting power, a connecting rod connecting the hydraulic actuator to the upper seat and the lower seat, and a pressure relief valve and a boost pedal arranged thereon.

[0016] Further, universal wheels and a towing tow bar are also arranged on the lower seat of the lifting mechanism.

[0017] Further, bundling assemblies are also arranged at both ends of the semi-circular sliding plate. The bundling assemblies include fixed binding ropes with adjustable lengths.

[0018] Further, rollers matched with the semi-circular sliding grooves are arranged on the side surface of the semi-circular sliding plate.

[0019] Further, the positioning seat is installed on the top surface of the lifting mechanism, the rotation adjustment mechanism is installed at the bottom of the positioning seat, and the pitching adjustment mechanism is installed on one side of the positioning seat.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1) For a disassembly and assembly device for an aircraft engine air intake duct in this case, by arranging a lifting mechanism, a rotation adjustment mechanism and a pitching adjustment mechanism to assist in adjusting the posture during the disassembly and assembly of the engine air intake duct, the installation and disassembly of the air intake duct can be completed without the cooperation of multiple people, saving time and effort and having high installation efficiency; it can also effectively avoid personal injuries caused by improper operation when disassembling and assembling a relatively heavy air intake duct.

[0022] 2) For a disassembly and assembly device for an aircraft engine air intake duct in this case, the structure is simple and stable, and the later maintenance amount is small, which can effectively save the cost of the airline company in equipping special lifting tools.

[0023] In order to understand the present utility model more clearly, the preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings. Description of the Drawings

[0024] Figure 1 is a reference diagram of the usage state of the present utility model;

[0025] Figure 2 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 3 is a schematic diagram of the structure of the rotation adjustment mechanism of the present utility model;

[0027] Figure 4 This is a schematic structural view of the pitching adjustment mechanism of the present utility model.

[0028] Reference signs in the drawings:

[0029] 1 - positioning seat, 11 - semi - circular bracket, 12 - semi - circular slide plate, 13 - pitching adjustment shaft; 21 - upper seat, 22 - lower seat, 23 - pressure relief valve, 24 - boost pedal; 31 - semi - circular rack, 32 - worm crank; 41 - support seat, 42 - kidney - shaped chute, 43 - screw crank, 44 - slider, 45 - articulated rod; 5 - fixed binding rope; 9 - engine air intake duct. Detailed implementation manners

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In addition, terms such as "first" and "second" are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and do not indicate or imply the relative importance and quantity of the indicated devices, elements or components, and thus cannot be understood as indicating or implying relative importance.

[0032] In addition, it should be noted that, unless otherwise clearly specified and limited, terms such as "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements; for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Please refer to Figures 1-4 , the present utility model provides an aircraft engine air intake duct disassembly and assembly device, including a positioning seat (1), a lifting mechanism, a rotary adjustment mechanism and a pitching adjustment mechanism. The positioning seat (1) is installed on the top surface of the lifting mechanism, the rotary adjustment mechanism is installed at the bottom of the positioning seat (1), and the pitching adjustment mechanism is installed on one side of the positioning seat (1).

[0034] The positioning seat (1) includes a semi-circular bracket (11). Along the semi-circular arc direction on the semi-circular bracket (11), there is a semi-circular chute (111), and a semi-circular sliding plate (12) is slidably arranged in the semi-circular chute (111); the positioning seat (1) is rotatably installed on the top surface of the lifting mechanism through a pitching adjustment shaft (13).

[0035] The lifting mechanism is a scissor hydraulic lifting mechanism, which includes an upper seat (21) and a lower seat (22) arranged at intervals, a hydraulic actuator arranged between the upper seat (21) and the lower seat (22) to provide lifting power, a connecting rod connecting the hydraulic actuator to the upper seat (21) and the lower seat (22), and a pressure relief valve (23), a boosting pedal (24), universal wheels and a towing tow bar arranged on the lower seat (22).

[0036] The rotation adjustment mechanism includes a semi-circular rack (31) and a worm crank (32) that mesh with each other; the semi-circular rack (31) is fixedly arranged on the arc-shaped bottom surface of the semi-circular sliding plate (12) of the positioning seat (1); the worm crank (32) is rotatably arranged on the positioning seat (1), and the worm crank (32) is provided with tooth patterns that mesh with the semi-circular rack (31). When the worm crank (32) is rotated manually, the cooperation of the semi-circular rack (31) and the worm crank (32) causes the semi-circular sliding plate (12) of the positioning seat (1) to rotate within the semi-circular bracket (11), thereby driving the engine intake duct (9) placed on the semi-circular sliding plate (12) to rotate along the axis, achieving the effect of adjusting the hole alignment in the circumferential direction.

[0037] The pitching adjustment mechanism includes a support seat (41) fixedly arranged on the top surface of the positioning seat (1). An assembly groove is arranged inside the support seat (41), and waist-shaped chutes (42) are symmetrically arranged on the side walls of the support seat (41); a screw rod crank (43) is rotatably arranged on the support seat (41), and the end of the screw rod crank (43) located inside the assembly groove is provided with external threads. A slider (44) is also arranged inside the assembly groove. Both ends of the slider (44) penetrate through the waist-shaped chutes (42), and both ends of the slider (44) are hinged to the positioning seat (1) through hinge rods (45); a threaded hole is arranged on the slider (44), the screw rod crank (43) penetrates through the threaded hole on the slider (44), and the threaded hole on the slider (44) cooperates with the external threads of the screw rod crank (43), so that the slider (44) can be driven by the screw rod crank (43), and under the guidance of the waist-shaped chutes (42), the slider (44) can slide inside the support seat (41).

[0038] The working principle of the pitching adjustment mechanism is as follows:

[0039] When the lead screw crank (43) is rotated manually in the forward direction, the lead screw crank (43) drives the slider (44) to slide towards the positioning seat (1). Under the combined action of the waist-shaped chute (42) and the hinge rod (45), the hinge rod (45) jacks up the positioning seat (1), causing the positioning seat (1) to deflect in the pitch direction with the pitch adjustment shaft (13) as the rotation axis; when the lead screw crank (43) is rotated manually in the reverse direction, the lead screw crank (43) drives the slider (44) to slide away from the positioning seat (1). Under the combined action of the waist-shaped chute (42) and the hinge rod (45), the hinge rod (45) pulls down the positioning seat (1), causing the positioning seat (1) to deflect in the pitch direction with the pitch adjustment shaft (13) as the rotation axis, so as to achieve the effect of adjusting the engine air intake duct (9) in the pitch direction for centering.

[0040] Preferably, in this embodiment, bundling components are further provided at both ends of the semi-circular slide plate (12). The bundling components include fixed binding ropes (5) with adjustable lengths, and the engine air intake duct (9) can be bound to the semi-circular slide plate (12) through the fixed binding ropes (5).

[0041] Preferably, in this embodiment, rollers matching the semi-circular chute (111) are provided on the side of the semi-circular slide plate (12), so that the semi-circular slide plate (12) slides more smoothly in the semi-circular chute (111).

[0042] A disassembly and assembly device for an aircraft engine air intake duct in this case has the following working principle and method:

[0043] When installing the engine air intake duct (9), the lifting mechanism is in the low position state. The engine air intake duct (9) is placed on the semi-circular slide plate (12), fixed by the fixed binding rope (5), and the engine air intake duct (9) is towed to the installation point by the towing rod of the lifting mechanism. Then, start to adjust the attitude of the air intake duct (9) to align it with the air intake duct (9) installation hole position:

[0044] Lifting adjustment: Rotate and close the pressure relief valve (23), step on the boost pedal (24) with the foot, and the lifting mechanism rises and lifts the air intake duct (9) for vertical adjustment;

[0045] Circumferential rotation adjustment: Perform circumferential rotation adjustment by rotating the worm crank (32);

[0046] Pitch adjustment: Rotate the lead screw crank (43) for pitch adjustment, and perform left-right, front-back adjustment through the universal wheels of the lifting mechanism;

[0047] After the above attitude adjustment, the air intake duct (9) is aligned with the hole position and can be installed smoothly. After the installation is completed, loosen the fixed binding rope (5) and evacuate the lifting mechanism;

[0048] The disassembly process of the engine air intake (9) is the reverse of the installation process.

[0049] Compared with the prior art, a disassembly and assembly device for an aircraft engine air intake in this case assists in adjusting the attitude during the disassembly and assembly of the engine air intake by setting up a lifting mechanism, a rotary adjustment mechanism, and a pitching adjustment mechanism. It can complete the installation and disassembly of the air intake without the cooperation of multiple people, saving time and effort and having a high installation efficiency.

[0050] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. An aircraft engine intake duct disassembly and assembly device, comprising a positioning seat (1), a lifting mechanism, a rotary adjustment mechanism and a pitching adjustment mechanism, characterized in that: The positioning seat (1) includes a semi-circular bracket (11), and a semi-circular chute (111) is arranged along the semi-circular arc direction on the semi-circular bracket (11), and a semi-circular sliding plate (12) is slidably arranged in the semi-circular chute (111); the positioning seat (1) is rotatably installed on the top surface of the lifting mechanism through a pitching adjustment shaft (13); The rotary adjustment mechanism includes a semi-circular rack (31) and a worm crank (32) that mesh with each other; the semi-circular rack (31) is fixedly arranged on the semi-circular sliding plate (12) of the positioning seat (1); the worm crank (32) is rotatably arranged on the positioning seat (1), and the worm crank (32) is provided with tooth patterns that mesh with the semi-circular rack (31).

2. The aircraft engine intake duct disassembly and assembly device according to claim 1, characterized in that: The pitching adjustment mechanism includes a support seat (41) fixedly arranged on the top surface of the positioning seat (1), an assembly groove is arranged inside the support seat (41), and waist-shaped chutes (42) are symmetrically arranged on the side walls of the support seat (41); a screw rod crank (43) is rotatably arranged on the support seat (41), and an external thread is arranged at one end of the screw rod crank (43) located in the assembly groove.

3. The disassembly and assembly device for an aircraft engine air intake according to claim 2, wherein: A slider (44) is further arranged in the assembly groove, both ends of the slider (44) penetrate through the waist-shaped chutes (42), and both ends of the slider (44) are hinged to the positioning seat (1) through hinge rods (45).

4. The disassembly and assembly device for an aircraft engine air intake according to claim 3, characterized in that: A screw hole is arranged on the slider (44), the screw rod crank (43) penetrates through the screw hole on the slider (44), and the screw hole on the slider (44) is matched with the external thread of the screw rod crank (43).

5. The disassembling and assembling device for an aircraft engine air intake according to claim 4, characterized in that: The lifting mechanism includes an upper seat (21) and a lower seat (22) arranged at intervals, a hydraulic actuator arranged between the upper seat (21) and the lower seat (22) and providing lifting power, a connecting rod connecting the hydraulic actuator to the upper seat (21) and the lower seat (22), and a pressure relief valve (23) and a boost pedal (24) arranged thereon.

6. The disassembling and assembling device for an aircraft engine air intake according to claim 5, wherein: Universal wheels and a towing tow bar are further arranged on the lower seat (22) of the lifting mechanism.

7. An aircraft engine intake duct disassembly and assembly device according to claim 6, characterized in that: Binding assemblies are further arranged at both ends of the semi-circular sliding plate (12), and the binding assemblies include fixed binding ropes (5) with adjustable lengths.

8. The disassembling and assembling device for the aircraft engine air intake according to claim 7, characterized in that: Rollers matching the semi-circular chute (111) are arranged on the side surface of the semi-circular sliding plate (12).

9. The aircraft engine inlet disassembly and assembly device according to claim 8, wherein: The positioning seat (1) is installed on the top surface of the lifting mechanism, the rotary adjustment mechanism is installed at the bottom of the positioning seat (1), and the pitching adjustment mechanism is installed on one side of the positioning seat (1).

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