Low-pressure rotor rear shaft large nut assembly device

Abstract

The application belongs to the technical field of aero-engine assembly tools, and particularly relates to a low-pressure rotor rear shaft large nut assembly device for assembling a large nut for a rear shaft of a low-pressure rotor in a casing, comprising a fixing shaft, an anti-rotation plate, a wrench and a fixing plate. The fixing shaft is used to explore into the rear shaft and fix the rear shaft based on the outside of the casing, and then the wrench is used to cooperate with the large nut to provide reliable torque for the large nut. The application can realize the disassembly and assembly of the large nut without removing the casing and can provide reliable torque for the large nut.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine assembly tool technology, specifically relating to a low-pressure rotor rear shaft large nut assembly device. Background Technology

[0002] The low-pressure shaft and its rear shaft are coaxially fixedly connected and are both installed in the housing. The outer ring of the end of the rear shaft is fitted with a large nut. When the large nut needs to be removed, the housing needs to be removed, which is time-consuming and laborious.

[0003] Since the rear axle and the pivot are fixed to each other, when the torque on the large nut is too large, it will cause the rear axle and the pivot to rotate, and the large nut cannot be reliably disassembled or assembled. Summary of the Invention

[0004] In view of this, the present invention provides a low-pressure rotor rear axle large nut assembly device, which uses a fixed shaft to insert into the rear axle and fix the rear axle based on the outside of the casing, and then uses a wrench in conjunction with the large nut to provide reliable torque to the large nut. The present invention can realize the disassembly and assembly of the large nut without removing the casing and can provide reliable torque to the large nut.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A low-pressure rotor rear shaft large nut assembly device, used for assembling a nut on the rear shaft of a low-pressure rotor inside a casing, comprising:

[0007] A fixed shaft, in the form of a cylinder, with at least a portion extending into the housing, and the end of the portion extending into the housing is provided with external teeth that mate with the inner ring of the rear shaft;

[0008] An anti-rotation plate is fixed to the end of the fixed shaft away from the rear shaft, for fixing the fixed shaft to the casing from the outside of the casing;

[0009] The wrench is cylindrical and fitted over the anti-rotation plate, with at least a portion extending into the housing. The end of the portion extending into the housing is provided with internal teeth that mate with the outer ring groove of the large nut.

[0010] A fixing plate is fixed to the end of the wrench away from the rear axle, and is provided with a mating port coaxial with the wrench; the mating port is used to connect a torque wrench adapter.

[0011] Wherein: the anti-rotation plate is positioned in the axial direction of the rear axle between the fixing plate and the wrench.

[0012] Furthermore, a coaxial hexagonal boss is provided at the end of the fixed shaft away from the rear axle; a hexagonal hole is provided at the center of the fixed plate; the fixed shaft and the fixed plate are connected to each other based on the hexagonal boss and the hexagonal hole.

[0013] Furthermore, the main body of the fixing plate is strip-shaped or rod-shaped.

[0014] Furthermore, the fixed shaft is provided with multiple weight-reducing holes.

[0015] Furthermore, the end of the wrench furthest from the rear axle is provided with two connecting lugs, and the fixing plate is fixed to the connecting lugs.

[0016] Furthermore, a handle is fixedly connected to the wrench.

[0017] Furthermore, the wrench is provided with multiple weight-reducing holes.

[0018] The beneficial effects of this invention are:

[0019] By inserting a fixed shaft into the rear axle and fixing the rear axle to the outside of the casing, and then using a wrench with a large nut to provide reliable torque to the large nut, this invention can achieve the disassembly and assembly of the large nut without removing the casing and can provide reliable torque to the large nut. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an axial view of a low-pressure rotor rear shaft large nut assembly device according to a specific embodiment of the present invention;

[0022] Figure 2 This is a radial view of the usage process of a low-pressure rotor rear shaft large nut assembly device according to a specific embodiment of the present invention;

[0023] The components include: 1. Wrench; 11. Handle; 2. Fixed shaft; 3. Fixed plate; 4. Anti-rotation plate; 5. Rear axle; 6. Large nut; 7. Casing. Detailed Implementation

[0024] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0025] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0029] In one embodiment of the present invention, a low-pressure rotor rear shaft 5 large nut 6 assembly device is provided for assembling the nut on the rear shaft 5 of the low-pressure rotor inside the casing 7, such as... Figure 1 , 2 As shown, it includes:

[0030] The fixed shaft 2 is cylindrical, with at least a portion extending into the housing 7. The end of the portion extending into the housing 7 is provided with external teeth that mate with the inner ring of the rear shaft 5.

[0031] Anti-rotation plate 4 is fixed to the end of the fixed shaft 2 away from the rear shaft 5, and is used to fix the fixed shaft 2 to the casing 7 from the outside of the casing 7;

[0032] The wrench 1 is cylindrical and is fitted outside the anti-rotation plate 4. At least a part of it extends into the housing 7. The end of the part extending into the housing 7 is provided with internal teeth that mate with the outer ring opening groove of the large nut 6.

[0033] A fixing plate 3 is fixed to the end of the wrench 1 away from the rear axle 5, and is provided with a mating port coaxial with the wrench 1; the mating port is used to connect the torque wrench 1 adapter.

[0034] Wherein: the anti-rotation plate 4 is located in the axial direction of the rear axle 5 between the fixing plate 3 and the wrench 1.

[0035] In this embodiment, a coaxial hexagonal boss is provided at the end of the fixed shaft 2 away from the rear shaft 5; a hexagonal hole is provided at the center of the fixed plate 3; the fixed shaft 2 and the fixed plate 3 are combined with each other based on the hexagonal boss and the hexagonal hole.

[0036] In this embodiment, the main body of the fixing plate 3 is strip-shaped or rod-shaped.

[0037] In this embodiment, the fixed shaft 2 is provided with multiple weight-reducing holes.

[0038] In this embodiment, the end of the wrench 1 away from the rear axle 5 is provided with two connecting ears, and the fixing plate 3 is fixed on the connecting ears.

[0039] In this embodiment, a handle 11 is fixedly connected to the wrench 1.

[0040] In this embodiment, the wrench 1 has multiple weight-reducing holes.

[0041] In this embodiment, the fixed shaft 2 is installed inside the rotor rear shaft 5. Its lower end is connected to the rotor rear shaft 5 through a transmission spline, and its upper end can be connected to the anti-rotation plate 4 through a hexagonal boss.

[0042] The anti-rotation plate 4 has a hexagonal hole in the middle. Based on the hexagonal hole and the hexagonal boss at the end of the fixed shaft 22, the two ends of the anti-rotation plate 4 can be installed on the screw posts of the fixed intermediate housing 7 to stop the low-pressure shaft.

[0043] The wrench 1 is connected to the large nut 6 through an open slot, which can drive the nut to rotate. It has a handle 11 at the top and a weight-reducing hole in the middle, which can be picked up by one person.

[0044] The fixing plate 3 is installed at the end of the wrench 1 and is fastened to the wrench 1 by screws. The fixing plate 3 has a square hole in the middle, which can be connected to the torque wrench 1 adapter.

[0045] Since the anti-rotation plate 4 is located between the fixed plate 3 and the wrench 1 in the axial direction of the rear axle 5, the anti-rotation plate 4 does not interfere with the wrench 1 in the axial direction; since the main body of the anti-rotation plate 4 is strip-shaped or rod-shaped, the anti-rotation plate 4 will only interfere with the rotation of the wrench 1 in a small area in the radial direction.

[0046] The usage process of this embodiment:

[0047] Mount the fixed shaft 2 into the internal spline of the rear shaft 5;

[0048] Fit the wrench 1 onto the outer ring of the large nut 6 and mate it with the outer ring interface of the large nut 6;

[0049] Install the anti-rotation plate 4 at the end of the fixed shaft 2, and then fix the anti-rotation plate 4 to the outside of the casing 7;

[0050] Fix the fixing plate 3 to the end of the wrench 1; at this time, the large nut 6 can be tightened to the specified torque based on the torque wrench 1 to complete the assembly of the large nut 6 on the low-pressure shaft rear shaft 5.

[0051] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A low-pressure rotor rear shaft large nut assembly device, used for assembling a nut on the rear shaft of a low-pressure rotor inside a casing, characterized in that, include: The fixed shaft is cylindrical, with at least a portion extending into the housing. The end of the portion extending into the housing is provided with external teeth that mate with the inner ring of the rear shaft. An anti-rotation plate is fixed to the end of the fixed shaft away from the rear shaft, for fixing the fixed shaft to the casing from the outside of the casing; The wrench is cylindrical and fitted over the anti-rotation plate, with at least a portion extending into the housing. The end of the portion extending into the housing is provided with internal teeth that mate with the outer ring groove of the large nut. A fixing plate is fixed to the end of the wrench away from the rear axle, and is provided with a mating port coaxial with the wrench; the mating port is used to connect a torque wrench adapter. Wherein: the anti-rotation plate is positioned in the axial direction of the rear axle between the fixing plate and the wrench. The fixed shaft is provided with a coaxial hexagonal boss at one end away from the rear axle; the anti-rotation plate is provided with a hexagonal hole at its center; the fixed shaft and the anti-rotation plate are connected to each other based on the hexagonal boss and the hexagonal hole; The main body of the fixing plate is rod-shaped; The wrench is provided with two connecting lugs at the end away from the rear axle, and the fixing plate is fixed to the connecting lugs.

2. The low-pressure rotor rear shaft large nut assembly device according to claim 1, characterized in that, The fixed shaft has multiple weight-reducing holes.

3. The low-pressure rotor rear shaft large nut assembly device according to claim 2, characterized in that, The wrench has a handle fixedly connected to it.

4. The low-pressure rotor rear shaft large nut assembly device according to claim 3, characterized in that, The wrench has multiple weight-reducing holes.

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