Device for multi-attitude decomposition of aero-engine fan unit body
By designing a multi-posture disassembly device, the fan unit can be disassembled horizontally and vertically downwards using an assisting arm and a rotating mechanism. This solves the problems of graphite parts being bumped and high-altitude operations, and achieves a safe and convenient disassembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-28
- Publication Date
- 2026-03-27
AI Technical Summary
Existing aircraft engine fan unit disassembly devices are prone to collisions between the two fulcrum graphite components during vertical disassembly, and the need to use high ladders poses a risk of personnel falling or tools dropping.
Design a device for multi-attitude disassembly of aero-engine fan unit, including a booster arm mechanism, a hoisting mechanism and a rotating mechanism. It uses gravity-assisted separation and precisely controls the separation speed through two attitude disassembly methods: horizontal and vertical downward. It avoids collisions with graphite parts and completes most of the tooling operations on the ground.
This technology enables safe and controllable disassembly of the fan unit, avoiding the risks of graphite component impact and high-altitude operations, and improving the safety and convenience of operation.
Smart Images
Figure CN121733475A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a device for multi-position disassembly of aero-engine fan unit, belonging to the field of aero-engine fan unit repair. Background Technology
[0002] The fan unit is a key component of an aero-engine, consisting of the intake casing, fan rotor, and other parts. Its core function is to compress air and generate thrust. During long-term operation, components such as blades and disks are prone to wear, corrosion, and fatigue cracks, requiring regular disassembly, inspection, maintenance, and replacement of parts to ensure engine performance and flight safety.
[0003] When disassembling the aero-engine fan unit based on existing technology, a vertical hoisting method is usually used to provide axial force for disassembly. However, the above-mentioned common aero-engine fan unit disassembly devices still have shortcomings: when the fan unit is disassembled vertically, if the vertical lifting speed is uneven or there is swaying, the two-point graphite parts located in the bearing housing at the end of the fan shaft are prone to contact with the inner cavity of the two-point support assembly, causing collisions between the two-point graphite parts; at the same time, when disassembling the fan unit vertically, a ladder frame of about three meters high is required. Due to the poor balance at high altitude and the inconvenience of tool access, it is easy to cause personnel to fall or parts and tools to fall. Summary of the Invention
[0004] This invention provides a device for multi-positional disassembly of an aero-engine fan unit, which solves the problem of contact between the two-point graphite components in the bearing housing at the end of the fan shaft and the inner cavity of the two-point support assembly when the engine is disassembled in different positions, causing the two-point graphite components to collide. At the same time, it solves the problem that when disassembling the fan unit vertically, a ladder frame of about three meters high is required, which is prone to causing personnel to fall or components and tools to fall due to poor balance of personnel at high altitudes and inconvenience in accessing tools.
[0005] This invention is achieved through the following technical solutions: A device for multi-attitude disassembly of an aero-engine fan unit includes a booster arm mechanism, a hoisting mechanism, and a rotating mechanism.
[0006] (1) Lifting mechanism The hoisting mechanism includes the main support frame 3 ( Figure 1 (Number 3 in the middle) Both ends of the main support frame 3 are fixedly connected to side support frames 4 (attached). Figure 1 (4 in the middle) Multiple reinforcing ribs 5 and 6 are set on the main support frame 3 and the side support frame 4. Figure 3 (The numbers 5 and 6 in the middle) increase the strength of the lifting equipment.
[0007] Meanwhile, a shaft insertion port 7 is provided at one end of the main support frame 3. Figure 4The middle figure 7, when in use, through the insertion rod 8 ( Figure 4 The middle figure 8) and the insertion hole 31 of the connecting seat 2 of the assisted arm mechanism ( Figure 1 The middle figure 2) cooperates with the assisted arm 1 to quickly connect.
[0008] The specific connection method is: one end of the insertion rod 8 is inserted into the shaft rod insertion port 7 of the main support frame 3, and the other end is inserted into the insertion hole 31 of the connecting seat 2, and the insertion pin 30 passes through the connecting seat hole 32 and the insertion rod hole 9 to fixedly connect the two.
[0009] The installation support plates 12 and 13 ( Figure 5 The middle figure 12, 13) are fixedly connected to the tail of the side support frame 4 on both sides of the hoisting mechanism. Figure 5 The installation support plates are connected with bearing connecting seats 14 ( Figure 5 The middle figure 14) with bearing capacity. The bearing connecting seats 14 are connected with bearings 15 ( Figure 5 The middle figure 15), rotating shafts 17 ( Figure 5 The middle figure 17), coupling devices 16 ( Figure 5 The middle figure 16), and rotating shaft and threaded hole support plate connecting devices 19 ( Figure 2 The middle figure 19). The threaded hole support plates 18 ( Figure 1 The middle figure 18) are fixedly connected to the rotating shafts 17. A plurality of clamp screw holes 20 are formed on the surfaces of the threaded hole support plates 18 on both sides. The first clamp mechanism is on the side of the side support frame 4 without the rotating mechanism, and the second clamp mechanism is on the side of the side support frame 4 with the rotating mechanism. The fan unit body 10 ( Figure 3 The middle figure 10) is hoisted through the bolts and the clamp screw holes 20 between the first clamp mechanism and the second clamp mechanism.
[0010] (2) Design of rotating mechanism The rotating mechanism ( Figure 6 ) is connected to the second clamp mechanism and includes a worm gear reducer 24 ( Figure 6 The middle figure 24) and a ratchet pawl 28 ( Figure 6 The middle figure 28). The worm gear reducer 24 is fixedly installed on the installation support plate 13 through a fixed frame 21, and the output end and one end of the coupling 16 are connected and transmit torque through an adapter shaft.
[0011] The surface of one end of the worm gear reducer 24 is fixedly connected with a ratchet wheel 23 ( Figure 6 The middle figure 23) and a ratchet wheel 23 matched therewith. One side of the connection between the ratchet wheel 23 and the worm gear reducer 24 is fixedly installed with a hand wheel 22 ( Figure 6 The middle figure 22), so that the fan unit body can be fixed on the device and can rotate around the connecting line of the first clamp mechanism and the second clamp mechanism as the rotation axis. And can be fixed at any position on the device.
[0012] A spring support 26 is mounted on the worm gear reducer 24 for mounting a pawl return torsion spring 27, and a pin shaft 25 passes through a ratchet mounting hole 29 to connect a pawl 28 to the worm gear reducer 24.
[0013] The fan unit body is fixed on the two lifting clamps by bolt connection through the clamp screw holes on the lifting clamps and the holes on the fan unit body, the hand wheel is rotated to drive the worm gear reducer, at this time, the output end of the worm gear reducer rotates to enable the fan unit body to rotate, and the horizontal and vertical downward two posture disassembly modes of the fan unit body can be realized.
[0014] On the one hand, different disassembly postures can be used according to different applicable models, when disassembled vertically downward, the air inlet casing faces downward, the fan rotor faces upward, the separation direction is consistent with the direction of gravity, gravity can be used to assist separation, the hand wheel can be used to accurately control the separation speed, component bounce or misplacement caused by sudden change of lifting force is avoided, and graphite parts and other precise structures are further protected.
[0015] On the other hand, when disassembled horizontally and vertically downward, the connecting bolts on the fan unit body are at the height of the waist to the chest of the operator, most of the tools can be taken and the bolts can be disassembled on the ground, so that the situation of high-altitude operation is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 Device use schematic diagram of the application; Figure 2 Screw hole support plate and fan unit body connection schematic diagram Figure 1 (A) Figure 3 Rotating mechanism use schematic diagram Figure 4 Power assisting arm and lifting mechanism connection schematic diagram Figure 5 Lifting mechanism schematic diagram Figure 6 Rotating mechanism schematic diagram Figure 5 (A) DETAILED DESCRIPTION
[0017] As Figures 1-6 shown, the application is a device for multi-posture disassembly of an aero-engine fan unit body, and the working process is as follows: (1) The insertion rod 8 (number 8 in the middle) Figure 4 at the end of the lifting mechanism is connected to the insertion pin hole 31 (number 31 in the middle) Figure 1 of the connecting seat 2 of the power assisting arm mechanism (number 1 in the middle) Figure 4 , and the insertion pin 30 (number 30 in the middle) Figure 4The middle number 30) is inserted into the hole of the inserting rod 8 to fix the device on the power arm mechanism; (2) Operating the power arm to drive the device to approach the first and second casing installation edges of the fan unit of the aero-engine; (3) The screw hole support plate 18 of the first and second clamp mechanisms is used to pass through the clamp screw hole 20 (the middle number 11) of the fan unit of the first and second casing installation edges 11 (the middle number 30) of the aero-engine; Figure 2 The middle number 20) is fixed by using the bolt; Figure 2 The middle number 20) is fixed by using the bolt; (4) Releasing the connection between the fan unit and the engine, operating the power arm to horizontally or vertically take out the fan unit downward; (5) Rotating the hand wheel 22 to drive the worm gear reducer 24 to control the rotating mechanism, and rotating the engine to the vertical downward state to place it on the machine part transfer trolley.
Claims
1. A device for multi-attitude disassembly of an aero-engine fan unit, characterized in that: Includes the boom mechanism, lifting mechanism, and rotating mechanism; The hoisting mechanism includes a main support frame (3), both ends of which are fixedly connected to side support frames (4), and the main support frame (3) and the assist arm mechanism are detachably connected; The bottom of the tail of the side support frame (4) on both sides of the hoisting mechanism is fixedly connected to the mounting plate. The mounting plate is connected to the bearing connecting seat (14) with load-bearing capacity. The bearing (15) is installed in the bearing connecting seat (14). The rotating shaft (17) is installed in the bearing (15). The end of the rotating shaft (17) away from the bearing connecting seat (14) is fixedly connected to the screw hole support plate (18). Multiple clamp screw holes (20) are opened on both sides of the screw hole support plate (18). The side of the side support frame (4) without the rotating mechanism is the first clamp mechanism, and the side with the rotating mechanism is the second clamp mechanism. The fan unit (10) is hoisted between the first clamp mechanism and the second clamp mechanism through bolts and clamp screw holes (20).
2. The device for multi-attitude decomposition of an aero-engine fan unit according to claim 1, characterized in that: The rotating mechanism is connected to the second clamping mechanism and includes a worm gear reducer (24). A ratchet (23) and a pawl (28) are fixedly connected to one end of the worm gear reducer (24). A hand crank (22) is fixedly installed on one side of the connection between the ratchet (23) and the worm gear reducer (24). The worm gear reducer (24) is fixedly installed on the mounting plate (13), and its output end and the rotating shaft (17) cooperate to transmit torque.
3. The device for multi-attitude decomposition of an aero-engine fan unit according to claim 2, characterized in that: The worm gear reducer (24) is equipped with a spring support (26) for mounting a pawl return torsion spring (27). A pin (25) passes through a ratchet mounting hole (29) to connect the pawl (28) to the worm gear reducer (24).
4. The device for multi-attitude decomposition of an aero-engine fan unit according to claim 2, characterized in that: The output end of the worm gear reducer (24) and the rotating shaft (17) are connected by a coupling (16).
5. The device for multi-attitude decomposition of an aero-engine fan unit according to claim 2, characterized in that: The output end of the worm gear reducer (24) and the rotating shaft (17) transmit torque through the meshing of two bevel gears.
6. The apparatus for multi-attitude decomposition of an aero-engine fan unit according to claim 2, characterized in that: The rotating shaft (17) is fixedly connected to the screw hole support plate (18) through the rotating shaft and screw hole support plate connecting device (19).
7. The device for multi-attitude decomposition of an aero-engine fan unit according to claim 2, characterized in that: The worm gear reducer (24) is fixedly mounted on the mounting plate (13) by a fixed frame (21).
8. The apparatus for multi-attitude decomposition of an aero-engine fan unit according to claim 1, characterized in that: Multiple reinforcing ribs are provided on the main support frame (3) and the side support frame (4).
9. The apparatus for multi-attitude decomposition of an aero-engine fan unit according to claim 1, characterized in that: One end of the main support frame (3) is provided with a shaft insertion port (7). When in use, the shaft (8) is engaged with the pin hole (31) of the connecting seat (2) of the assist arm mechanism to quickly connect with the assist arm (1).
10. The apparatus for multi-attitude decomposition of an aero-engine fan unit according to claim 9, characterized in that: One end of the insertion rod (8) is inserted into the shaft insertion port (7) of the main support frame (3), and the other end is inserted into the pin hole (31) of the connecting seat (2) of the assist arm mechanism. The pin (30) passes through the connecting seat hole (32) and the insertion rod hole (9) to fix the two together.