Graphite sealing device auxiliary assembly and disassembly, limiting protection tool

Abstract

The application discloses a graphite sealing device auxiliary assembling and disassembling and limiting protection tool, which comprises a radial moving part, a bottom supporting part and a limiting part arranged on the radial moving part in sequence; the bottom supporting part comprises a fixed inner bottom supporting part arranged at the bottom end of the radial moving part and a movable outer bottom supporting part connected with the fixed inner bottom supporting part; the limiting part comprises a movable limiting seat in contact connection with the movable outer bottom supporting part, a linkage rod connected with the movable limiting seat and a fixed limiting seat connected with the linkage rod. The tool is suitable for assisting and limiting protection during the assembling and disassembling of the graphite sealing device, can protect the graphite sealing device from being bumped by limiting the movement of the graphite sealing device, and makes the assembling and disassembling process of the graphite sealing device more efficient.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine manufacturing technology, specifically relating to auxiliary assembly and disassembly and limit protection tooling for graphite sealing devices. Background Technology

[0002] The centrifugal ventilator assembly includes a sealing device containing a graphite ring. The working surface of the sealing device must be free of scratches, pinholes, and graphite detachment. The contact surfaces between the shaft and the graphite must also be free of scratches, pinholes, and other defects. During aero-engine operation, the ambient pressure decreases as flight altitude increases. If the graphite sealing device is damaged during assembly, resulting in substandard airtightness and excessive lubricating oil consumption, the oil chamber pressure will drop, causing a decrease in the pump inlet pressure and affecting the normal operation of the lubricating oil pump, potentially leading to a quality incident. Therefore, the correct assembly and appearance quality of the graphite sealing device must be ensured; otherwise, the engine's delivery quality and performance will be affected.

[0003] During the assembly of centrifugal ventilators for aero-engines, the sealing device needs to be installed into a housing with a valve to measure its dimensions and select appropriate adjusting shims. To ensure the thickness of the adjusting shims, repeated assembly and disassembly are required. The sealing device, specifically the graphite sealing device, includes a mounting base and a graphite ring, among other components. Graphite is highly susceptible to damage, requiring strict assembly control. Current methods involve operators using a lifting hammer to assemble and disassemble the graphite sealing device. The hammer is made of 45 steel, which has high strength and hardness, making it highly susceptible to damage to the mounting base and graphite during the process. This can lead to substandard airtightness or failure to pass visual quality inspections, rendering the graphite unusable. On one hand, damage to the graphite sealing device, resulting in blind assembly and subsequent airtightness failures, cannot be re-inspected, potentially leading to substandard engine performance indicators and other quality issues. On the other hand, aero-engine graphite sealing devices are expensive and require 1 hour of immersion in lubricating oil before assembly; replacement significantly increases production costs and wastes time. Summary of the Invention

[0004] To address the aforementioned issues, this invention aims to provide auxiliary assembly and disassembly, and limiting protection tooling for graphite sealing devices, thereby reducing potential bumps and scratches during assembly and disassembly, and making the graphite sealing devices easier to assemble and disassemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A graphite sealing device auxiliary assembly and disassembly, and limit protection fixture, including a radial moving part, on which a base support part and a limit part are sequentially arranged;

[0007] The base support component includes a fixed inner base support located at the bottom end of the radially movable component, and a movable outer base support connected to the fixed inner base support;

[0008] The limiting component includes a movable limiting seat that contacts and connects to the movable outer base, a linkage rod connected to the movable limiting seat, and a fixed limiting seat connected to the linkage rod.

[0009] Preferably, the radially moving component includes a threaded rod base, an external threaded rod disposed on the threaded rod base, and an internal threaded rod disposed at one end of the external threaded rod; the internal threaded rod achieves radial movement through the thread and the external threaded rod.

[0010] Preferably, the fixed inner base is sleeved on the external threaded rod and connected to the base of the threaded rod.

[0011] Preferably, the movable outer base is located on both sides of the fixed inner base.

[0012] Preferably, the movable outer base is connected to the fixed inner base via a first connecting rod and a first pin.

[0013] Preferably, the movable limit seat is slidably disposed on the external threaded rod.

[0014] Preferably, the movable limiting seat is connected to one end of the linkage rod via the second connecting rod and the second pin.

[0015] Preferably, the fixed limiting seat is installed on the internal thread rod and is located at one end of the external thread rod.

[0016] Preferably, the other end of the linkage rod is connected to the fixed limit seat via a third pin.

[0017] Preferably, a handle is provided at the other end of the internally threaded rod.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The auxiliary assembly and disassembly, and limiting protection tooling of the graphite sealing device in this invention is suitable for auxiliary and limiting protection during the assembly and disassembly process of the graphite sealing device. It can protect the graphite sealing device from bumps by restricting its movement, and at the same time make the assembly and disassembly process of the graphite sealing device more efficient. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the auxiliary assembly / disassembly and limiting protection tooling for the graphite sealing device in this invention;

[0022] Figure 2This is a schematic diagram of the limiting component in the present invention in a non-limiting state;

[0023] Reference numerals in the attached diagram: 1-Fixed inner base, 2-Modible outer base, 3-Modible limit seat, 4-Linkage rod, 5-Fixed limit seat, 6-Threaded rod base, 7-External threaded rod, 8-Internal threaded rod, 9-First pin, 10-Second connecting rod, 11-Second pin, 12-Third pin, 13-Handle. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0025] Reference Figure 1 and Figure 2 The present invention provides an auxiliary assembly / disassembly and limiting protection tool for a graphite sealing device, comprising a radially moving component, on which a base support component and a limiting component are sequentially arranged.

[0026] Specifically, the radially moving component includes a threaded rod base 6, which bears the load; an external threaded rod 7 is located at the middle of the threaded rod base 6, and an internal threaded rod 8 is threadedly connected to one end of the external threaded rod 7; the internal threaded rod 8 can move radially relative to the external threaded rod 7. A handle 13 is provided at the other end of the internal threaded rod 8 to facilitate rotation of the internal threaded rod 8 to achieve radial movement.

[0027] The base support component includes a fixed inner base support 1 sleeved on the external threaded rod 7, and the fixed inner base support 1 is mounted on the threaded rod base 6. Movable outer base supports 2 are provided on opposite sides of the fixed inner base support 1; in this embodiment, two movable outer base supports 2 are provided. The fixed inner base support 1 and the movable outer base supports 2, together with the radial moving component and the limiting component, form the main load-bearing structure. The movable outer base supports 2, due to their mobility, can contract or expand their circumferential length relative to the fixed inner base support 1. When it needs to pass through the graphite sealing device, the movable outer base support 2 can contract closer to the external threaded rod 7 to shorten its length. After passing through the graphite sealing device, it can expand outwards to form the same plane as the fixed inner base support 1, thus meeting the load-bearing requirements of the graphite sealing device.

[0028] The movable outer base 2 is connected to the fixed inner base 1 via a first connecting rod and a first pin 9. Specifically, mounting grooves for the movable outer base 2 are provided on opposite sides of the fixed inner base 1. One end of the first connecting rod and the movable outer base 2 are located within the mounting grooves, and a first pin 9 is provided at each end of the first connecting rod, connecting to the movable outer base 2 and the fixed inner base 1 respectively. Through the cooperation of the first connecting rod and the first pin 9, the movable outer base 2 can be fully inserted into the mounting groove of the fixed inner base 1, so that the top of the movable outer base 2 and the fixed inner base 1 form a plane.

[0029] The limiting component includes a movable limiting seat 3 that contacts and connects to the movable outer base 2, a linkage rod 4 connected to the movable limiting seat 3, and a fixed limiting seat 5 connected to the linkage rod 4. The movable limiting seat 3 is slidably mounted on the external threaded rod 7; the fixed limiting seat 5 is fixedly mounted on the internal threaded rod 8 and is located at one end of the external threaded rod 7. When the limiting component is in a non-bottom position, such as Figure 2 When the limiting component is in the non-limiting state, gravity causes the linkage rod 4 to retract naturally, allowing it to penetrate deep into the inner ring of the graphite sealing device. When the limiting component is in the bottom position, as... Figure 1 When the limiting component is in the limiting state, as the internal thread rod 8 moves towards the external thread rod 7, the outer diameter of the limiting component gradually expands, that is, the linkage rod 4 expands outward until it completely presses against the inner ring of the graphite sealing device, thus forming a limit.

[0030] In this embodiment, four linkage rods 4 are arranged symmetrically in pairs. The movable limiting seat 3 is connected to one end of the linkage rod 4 via the second connecting rod 10 and the second pin 11; the other end of the linkage rod 4 is connected to the fixed limiting seat 5 via the third pin 12.

[0031] The graphite sealing device in this invention is an auxiliary assembly / disassembly and limit protection tooling. It uses metal materials to ensure that it can withstand the required forces during use. Hard silicone or plastic materials are used on the surfaces that come into direct contact with the graphite sealing device to avoid scratching the surface of the parts.

[0032] In this invention, the radial moving component, the base support component, and the limiting component work together to achieve the load-bearing and limiting functions required during the assembly of the graphite sealing device. Both the base support component and the limiting component utilize contraction and expansion structures to ensure ease of operation. This tooling reduces the assembly difficulty of the graphite sealing device, saves a significant amount of time during assembly and disassembly, and provides necessary protection for the graphite sealing device during assembly and disassembly, preventing damage to parts from impacts and scratches.

[0033] The foregoing has provided a detailed description of the auxiliary assembly / disassembly and limiting protection fixture for the graphite sealing device provided by this invention. Specific examples have been used to illustrate the structure and working principle of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A tooling for auxiliary assembly / disassembly and limit protection of a graphite sealing device, characterized in that: It includes a radially moving component, on which a base support component and a limiting component are sequentially arranged; The base support component includes a fixed inner base support (1) located at the bottom end of the radially moving component, and a movable outer base support (2) connected to the fixed inner base support (1). The limiting component includes a movable limiting seat (3) that is in contact with the movable outer base (2), a linkage rod (4) that is connected to the movable limiting seat (3), and a fixed limiting seat (5) that is connected to the linkage rod (4). The radially moving component includes a threaded rod base (6), an external threaded rod (7) disposed on the threaded rod base (6), and an internal threaded rod (8) disposed at one end of the external threaded rod (7); the internal threaded rod (8) achieves radial movement between the thread and the external threaded rod (7).

2. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 1, characterized in that: The fixed inner base (1) is sleeved on the external threaded rod (7) and connected to the threaded rod base (6).

3. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 1, characterized in that: The movable outer base (2) is located on both sides opposite to the fixed inner base (1).

4. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 3, characterized in that: The movable outer base (2) is connected to the fixed inner base (1) via the first connecting rod and the first pin (9).

5. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 1, characterized in that: The movable limit seat (3) is slidably mounted on the external thread rod (7).

6. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 5, characterized in that: The movable limit seat (3) is connected to one end of the second pin (11) and the linkage rod (4) via the second link (10).

7. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 1, characterized in that: The fixed limit seat (5) is installed on the internal thread rod (8) and is located at one end of the external thread rod (7).

8. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 7, characterized in that: The other end of the linkage rod (4) is connected to the fixed limit seat (5) through the third pin (12).

9. The auxiliary assembly / disassembly and limit protection fixture for the graphite sealing device according to claim 1, characterized in that: A handle (13) is provided at the other end of the internally threaded rod (8).

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