Tool for disassembling secondary turbine rotor and connecting shaft of auxiliary power device
By designing a tool for disassembling the secondary turbine rotor and connecting shaft of an aviation auxiliary power unit, the problem of difficult to effectively disassemble in the existing technology is solved, non-destructive disassembly is achieved, maintenance efficiency is improved and APU performance is protected.
Patent Information
- Application Number
- CN202422418948.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-08
AI Technical Summary
Existing technology makes it difficult to effectively disassemble the secondary turbine rotor and connecting shaft in an aviation auxiliary power unit (APU), especially in the case of metal adhesion. Traditional methods are inefficient and may damage the connecting shaft.
A tooling was designed, including a base, outer ring support, threaded column, connector and fixing ring. The second-stage turbine rotor was fixed by fixing screws and washers, and the threaded column and fixing ring were used to separate the meshing ends to achieve non-destructive disassembly.
The non-destructive disassembly of the second-stage turbine rotor and the connecting shaft was achieved, which improved the maintenance efficiency of the aviation auxiliary power unit and avoided potential damage to the APU performance.
Smart Images
Figure CN223313867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of disassembly of aviation auxiliary power devices, in particular to a tool for disassembling a secondary turbine rotor and a connecting shaft of an auxiliary power device. Background Art
[0002] During the maintenance of an auxiliary power unit (APU), disassembly often presents a series of challenges, especially when dealing with the hot end components of the power section. Separating the second-stage turbine rotor from its connecting shaft is particularly challenging because these components are subjected to high temperatures during APU operation, leading to metal-to-metal adhesion and rendering traditional disassembly methods ineffective.
[0003] In the precision mechanical structure of an APU, the secondary turbine rotor and connecting shaft are tightly coupled via end teeth to ensure efficient power transmission. However, this tight meshing, exposed to high temperatures for extended periods, can lead to metal adhesion between the end teeth, a common phenomenon in aviation maintenance. When metal adhesion occurs, traditional methods such as knocking or prying are not only inefficient but also highly likely to damage the connecting shaft, compromising repair efficiency and potentially impacting APU performance in the long term. Utility Model Content
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a tool for disassembling the secondary turbine rotor and the connecting shaft of the auxiliary power unit, solving the problem of inconvenience in disassembling the secondary turbine rotor and the connecting shaft in the prior art.
[0005] A tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit includes a base, which is a disc structure with three steps. A fixing screw is vertically arranged at the center of the base, an outer ring support is arranged above the base, a threaded column is arranged at the center of the inner side of the outer ring support, a connecting piece is fixedly arranged below the threaded column, a fixing ring is arranged below the connecting piece, and a locking block is arranged inside the fixing ring.
[0006] Furthermore, a washer is provided on the fixing screw.
[0007] Furthermore, the outer ring support is an inverted cylindrical barrel structure with rectangular grooves symmetrically opened on the bottom.
[0008] Furthermore, the threaded column is arranged through the center of the top of the outer ring support.
[0009] Furthermore, the fixing ring is formed by splicing two semicircular columnar structures, and rectangular bosses are provided on the top and bottom of the fixed outer end.
[0010] Beneficial effects of the utility model:
[0011] The present application fixes the second-stage turbine rotor to ensure that the relative position of the second-stage turbine rotor and the tooling is fixed, so that the connecting shaft is not damaged during disassembly, thereby achieving non-destructive disassembly of the second-stage turbine rotor and the connecting shaft, improving the maintenance efficiency of the aviation auxiliary power unit, and avoiding the impact on the APU performance caused by maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The diagram is a schematic diagram of a tooling structure for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit.
[0013] In the figure: 1-base, 2-washer, 3-fixing screw, 4-outer ring support, 5-fixing ring, 6-locking block, 7-connector, 8-threaded column. DETAILED DESCRIPTION
[0014] The following describes the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. It should be noted that in this specification, similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures.
[0015] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by persons with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity restriction, but rather indicate the existence of at least one. Words such as "set", "connected", "connected" and similar words should be understood in a broad sense. For example, it 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 a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances. The directions or positional relationships indicated by “upper”, “lower”, “left”, “right”, “inner”, and “bottom” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they cannot be understood as limiting the utility model.
[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0017] In this embodiment, as shown in the attached Figure 1 As shown, a tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit includes a base 1, which is a disc structure with a three-step structure. A fixing screw 3 is vertically arranged at the center of the base 1, an outer ring support 4 is arranged above the base 1, a threaded column 8 is arranged at the center of the inner side of the outer ring support 4, a connecting piece 7 is fixedly arranged below the threaded column 8, a fixing ring 5 is arranged below the connecting piece 7, and a locking block 6 is arranged inside the fixing ring 5.
[0018] Furthermore, a washer 2 is provided on the fixing screw 3 .
[0019] Furthermore, the outer ring support 4 is an inverted cylindrical barrel structure with rectangular grooves symmetrically opened on the bottom.
[0020] Furthermore, the threaded column 8 is provided through the top center of the outer ring support 4 .
[0021] Furthermore, the fixing ring 5 is formed by splicing two semicircular columnar structures, and rectangular bosses are provided on the top and bottom of the fixed outer end.
[0022] The specific usage of this application is as follows:
[0023] First, fix the base 1 (a bench vise can be used) when using it, use the washer 2 and the fixing screw 3 to fix the secondary turbine rotor, and make sure that the fixing screw 3 is locked to ensure that the relative position of the secondary turbine rotor and the tooling is fixed.
[0024] Next, install the outer ring support 4 part into the connecting shaft and insert the threaded column 8.
[0025] Finally, use the threaded column 8 to connect to the fixing ring 5 fixed to the connecting shaft. After fixing, twist the threaded column 8 in the direction to separate the two engaged ends.
[0026] Beneficial effects of the utility model:
[0027] The present application fixes the second-stage turbine rotor to ensure that the relative position of the second-stage turbine rotor and the tooling is fixed, so that the connecting shaft is not damaged during disassembly, thereby achieving non-destructive disassembly of the second-stage turbine rotor and the connecting shaft, improving the maintenance efficiency of the aviation auxiliary power unit, and avoiding the impact on the APU performance caused by maintenance.
[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. A tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit, characterized in that: The invention comprises a base (1), which is a disc structure with a three-step structure. A fixing screw (3) is vertically arranged at the center of the base (1). An outer ring support (4) is arranged above the base (1). A threaded column (8) is arranged at the center of the inner side of the outer ring support (4). A connecting piece (7) is fixedly arranged below the threaded column (8). A fixing ring (5) is arranged below the connecting piece (7). A locking block (6) is arranged inside the fixing ring (5).
2. The tool for disassembling the secondary turbine rotor and connecting shaft of the auxiliary power unit according to claim 1, characterized in that: The fixing screw (3) is also provided with a washer (2).
3. The tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit according to claim 1, characterized in that: The outer ring support (4) is an inverted cylindrical barrel structure with rectangular grooves symmetrically opened at the bottom.
4. The tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit according to claim 1, characterized in that: The threaded column (8) is arranged through the top center of the outer ring support (4).
5. The tool for disassembling the secondary turbine rotor and connecting shaft of an auxiliary power unit according to claim 1, characterized in that: The fixing ring (5) is formed by splicing two semicircular columnar structures, and rectangular bosses are provided on the top and bottom of the fixed outer end.