Assembling and disassembling assembly tool for long shaft and gas compressor shaft of APU

Abstract

The utility model discloses an APU long shaft and air compressor shaft dismounting assembly tool which comprises a long shaft, an air compressor shaft and a base fixed on an operation table, two semicircular clamps are arranged on the base, one clamp is fixedly connected with the base, one sides of the two clamps are hinged, a connecting block is arranged on the other sides of the two clamps, and the long shaft is connected with the air compressor shaft. A through hole is formed in the connecting block, an annular protrusion is arranged in the clamp, a rubber pad is arranged on the protrusion, and a T-shaped pin is arranged at the tail end of the aerostatic press shaft, in the whole disassembling and assembling process, the clamp plays a good role in protecting the long shaft, and during disassembling, shaking of arms of a worker does not damage the long shaft; meanwhile, the force application point and the force bearing point are both arranged on the aerostatic press shaft, so that the distance between the force application point and the force bearing point is shortened, damage to the long shaft in the dismounting process is avoided, the situation that the long shaft is distorted and deformed due to torsion force is avoided, and the quality requirement after the long shaft is dismounted is guaranteed.

Description

Technical Field

[0001] The utility model relates to a disassembly and assembly tool for shaft parts, in particular to a disassembly and assembly tool for an APU long shaft and a compressor shaft. Background Art

[0002] The auxiliary power unit (APU) is a small, single-shaft, centrifugal gas turbine engine. It rotates on a single main shaft. The 131-9A / B APU rotor consists of a compressor shaft, which drives the centrifugal compressor impeller, an intermediate shaft, a main shaft, a compressor shaft, a centrifugal compressor impeller, a first-stage turbine, a second-stage turbine, and a coupling. The main shaft and compressor shaft are key components.

[0003] The APU needs to be sent to the workshop for overhaul after 10,000 hours of work. When disassembling the APU, the specific method specified in the manual is: tighten the two tooling nuts onto the threads at the rear end of the long shaft, fix the tooling to the vise clamp, and let the spline groove end on the compressor shaft match the tooling spline, so as to limit the compressor shaft on the circumference, and then tighten the two tooling nuts to each other, and rotate the long shaft by loosening one of the nuts counterclockwise to separate the long shaft and the compressor shaft.

[0004] The problem with this method is that when disassembling or assembling, the force application point is at the end of the long shaft, while the final force-bearing point is at the front end of the long shaft. The force application point and the force-bearing point are separated by the entire distance of the long shaft, which results in: 1. The force applied at the end of the long shaft cannot be evenly transmitted to the front end of the long shaft, thereby increasing the difficulty of disassembly. It is often necessary to apply greater force to separate the long shaft and the compressor shaft. In severe cases, it may even cause disassembly; 2. Since the applied torque is completely transmitted through the long shaft, and the force applied at the force application point is greater than the force received at the force-bearing point In this way, the part of the force lost in the middle is basically absorbed by the long shaft, causing the long shaft to twist and deform. The microscopic deformation will affect the runout value of the long shaft. The engine manual requires that the overall runout of the long shaft must be checked before the rotor is balanced. If the size exceeds the manual range, the long shaft will be prohibited from use; 3. During the entire disassembly process, since there is no protection for the long shaft itself, it is difficult for the worker's arm to maintain balance during disassembly, and the shaking of the arm can easily cause damage to the long shaft. Moreover, the greater the force used during disassembly, the more difficult it is to control the balance, and the greater the damage to the long shaft. Utility Model Content

[0005] The technical task of the present utility model is to provide an APU long shaft and compressor shaft disassembly and assembly tooling in view of the above deficiencies in the existing technology.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an APU long shaft and compressor shaft disassembly and assembly tool, including a long shaft, a compressor shaft and a base fixedly connected to an operating table, two semicircular clamps are provided on the base, one of the clamps is fixedly connected to the base, one side of the two clamps is hinged, and a connecting block is provided on the other side of the two clamps, a through hole is provided on the connecting block, an annular protrusion is provided in the clamp, a rubber pad is provided on the protrusion, a "T"-shaped pin is provided at the end of the compressor shaft, the end section of the pin is a regular hexagon, and a spline is provided on the circumferential surface of the front section of the pin.

[0007] Further improvement: a hexagonal boss is provided at one end of the clamp, a circular boss is provided on the outside of the hexagonal boss, and the diameter of the circular boss is larger than the diameter of the circumscribed circle of the hexagonal boss.

[0008] The advantages of the present invention are as follows: during disassembly and assembly, the long shaft is placed between the two clamps. After the two clamps are merged, the long shaft is fixed. At this time, the pin is matched with the compressor shaft, and the compressor shaft is driven to rotate by rotating the pin, thereby completing the disassembly and assembly work. During the whole process, the clamp plays a good protective role for the long shaft. During disassembly, the shaking of the worker's arm will not cause damage to the long shaft. At the same time, because the force application point and the force receiving point are both on the compressor shaft, and the compressor shaft itself is relatively short, the distance between the force application point and the force receiving point is shortened, thereby avoiding damage to the long shaft during the disassembly process, and also reducing the force required by the worker for disassembly, and ultimately avoiding the distortion of the long shaft due to torque, thereby ensuring the quality requirements of the long shaft after disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the utility model.

[0010] Figure 2 It is a structural diagram of the clamp of the present utility model.

[0011] In the figure: long shaft 1, first nut 11, second nut 12, clamp 2, connecting block 21, through hole 22, protrusion 3, rubber pad 4, hexagonal boss 5, circular boss 6, base 7, air compressor shaft 8, keyway 81, pin 9, spline 91. DETAILED DESCRIPTION

[0012] The present invention is described in detail below with reference to the accompanying drawings.

[0013] As shown in the figure, a tool for disassembling and assembling an APU long shaft and compressor shaft comprises a long shaft 1, a compressor shaft 8 and a base 7 fixedly connected to an operating table, wherein two semicircular clamps 2 are provided on the base 7, wherein one clamp 2 is fixedly connected to the base 7, one side of the two clamps 2 is hinged, and a connecting block 21 is provided on the other side of the two clamps 2, wherein a through hole 22 is provided on the connecting block 21, an annular protrusion 3 is provided in the clamp 2, and a rubber pad 4 is provided on the protrusion 3, and a "T"-shaped pin 9 is provided at the end of the compressor shaft 8, wherein the end section of the pin 9 is a regular hexagon, and a spline 91 is provided on the circumferential surface of the front section of the pin 9, and after the front section of the pin 9 is inserted into the compressor shaft 8, the spline 91 cooperates with the keyway 81 in the compressor shaft 8, thereby constraining the circumferential movement of the compressor shaft 8 and the pin 9.

[0014] A hexagonal boss 5 is provided at one end of the clamp 2 , and a circular boss 6 is provided on the outer side of the hexagonal boss 5 . The diameter of the circular boss 6 is larger than the diameter of the circumscribed circle of the hexagonal boss 5 .

[0015] Its working principle is: when disassembling and assembling the long shaft 1, first place the long shaft 1 into the clamp 2, then close the two clamps 2, pass the bolts through the through-holes 22 on the connecting block 21, and then use the bolts to tightly fix the two clamps 2 together. At this time, the long shaft 1 is firmly fixed in the clamp 2, and then the pin 9 is inserted into the compressor shaft 8, and the spline 91 cooperates with the keyway 81 in the compressor shaft 8, thereby constraining the circumferential movement of the compressor shaft 8 and the pin 9. Finally, by rotating the pin 9, the compressor shaft 8 is driven to rotate, and the disassembly or installation of the long shaft 1 and the compressor shaft 8 is completed.

[0016] Before placing the long shaft 1 into the fixture 2, the two tooling nuts can be tightened onto the threads at the rear end of the long shaft 1. At this time, the first nut 11 located on the inside is consistent with the hexagonal boss 5, and the second nut 12 located on the outside is located in the circular boss 6. In this way, the first nut 11 can also play a good limiting role on the end of the long shaft 1 during disassembly and assembly.

[0017] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tool for disassembling and assembling an APU long shaft and a compressor shaft, comprising a long shaft and a compressor shaft, characterized by: It includes a base fixedly connected to the operating table, with two semicircular clamps provided on the base, one of which is fixedly connected to the base, one side of the two clamps is hinged, and a connecting block is provided on the other side of the two clamps, with a through hole provided on the connecting block, an annular protrusion provided in the clamp, a rubber pad provided on the protrusion, and a "T"-shaped pin provided at the end of the air compressor shaft, the end section of the pin is a regular hexagon, and a spline is provided on the circumferential surface of the front section of the pin.

2. The APU long shaft and compressor shaft disassembly and assembly tool according to claim 1, characterized in that: A hexagonal boss is provided at one end of the clamp, and a circular boss is provided on the outer side of the hexagonal boss. The diameter of the circular boss is larger than the diameter of the circumscribed circle of the hexagonal boss.

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