A closed-type fluoroplastic retaining ring assembly device and its usage method

Abstract

This invention relates to the field of aviation repair, specifically to a closed-type fluoroplastic retaining ring assembly device and its usage method. The assembly device includes an upper clamping ring and a lower clamping ring, which are locked together by locking screws. Both the upper and lower clamping rings have internal grooves to facilitate pressing the fluoroplastic retaining ring into the part. The specific steps are as follows: S1, inspect the part surface; S2, heat the fluoroplastic retaining ring; S3, install in a hot state; S4, heat to shrink; S5, install and tighten; S6, lock and apply pressure; S7, shrink and shape; S8, natural cooling; S9, visual inspection; S10, cleaning. During use, the upper and lower clamping rings can be controlled to slowly adhere to the fluoroplastic retaining ring, preventing distortion and deformation. The locking screws are tightened gradually, making operation simple and convenient. The clamping force can be controlled and gradually increased to ensure the fluoroplastic retaining ring is properly shrunk. The operation is simple, has a high error tolerance, and is beneficial for improving assembly efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of aircraft repair, specifically to a closed-type fluoroplastic retaining ring assembly device and its usage method. Background Technology

[0002] Currently, aircraft have a large number of rubber sealing devices. To prevent rubber from being squeezed into gaps under the pressure of the working medium, fluoroplastic retaining rings are usually installed. These sealing rings and fluoroplastic retaining rings are convenient, economical, and effective, and therefore frequently used. During aircraft maintenance, fluoroplastic retaining rings that perform sealing functions or exhibit defects such as deformation, damage, breakage, discoloration, or burrs should be replaced. Currently, after replacing closed-type fluoroplastic retaining rings, bushing shrinkage is used, which cannot control the recovery of the fluoroplastic retaining ring's torsional deformation. Inventing a closed-type fluoroplastic retaining ring assembly device and method to meet the assembly requirements of fluoroplastic retaining rings is of great significance to the aviation maintenance process. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a closed-type fluoroplastic retaining ring assembly device and its usage method.

[0004] A closed-type fluoroplastic retaining ring assembly device includes an upper clamping ring and a lower clamping ring that are locked together by a locking screw. Both the upper and lower clamping rings are provided with an inner groove to facilitate pressing the fluoroplastic retaining ring into the part.

[0005] As a further improvement of the present invention, both the upper and lower clamping rings are semi-circular.

[0006] As a further improvement of the present invention, the upper and lower clamping rings are fitted with the sealing groove of the part, the inner diameter of the upper and lower clamping rings is consistent with the diameter of the sealing groove of the part, and the inner groove diameter of the upper and lower clamping rings is consistent with the outer diameter of the fluoroplastic retaining ring.

[0007] As a further improvement of the present invention, the lower clamping ring and the locking screw are threaded together, and the screw hole of the upper clamping ring is unthreaded.

[0008] As a further improvement of the present invention, the widths of the upper and lower clamping rings are consistent with the width of the sealing groove.

[0009] As a further improvement of the present invention, the head of the locking screw is provided with a protruding handle for easy manual disassembly and assembly.

[0010] A method for using a closed-type fluoroplastic retaining ring assembly device, the specific steps of which are as follows:

[0011] S1. Inspect the surface of the parts: The neck surface of the parts that mate with the fluoroplastic retaining ring should be smooth and free of corrosive products. Before installation at room temperature, check that the fluoroplastic retaining ring is free from deformation, breakage, discoloration, and burrs.

[0012] S2. Heating the fluoroplastic retaining ring: Place the fluoroplastic retaining ring in a heating box and heat it to 170±5℃. Install the fluoroplastic retaining ring when it becomes soft and easily deformed.

[0013] S3. Hot installation: Wear heat-resistant gloves to remove the fluoroplastic retaining ring and install it into the sealing groove while it is hot.

[0014] S4. Heating and shrinkage: Place the parts and fluoroplastic retaining rings together in a heating chamber and heat at 170±5℃ for 5-10 minutes. The fluoroplastic retaining rings will shrink naturally at the beginning.

[0015] S5. Installation and tightening: After the heating is completed and the rings have naturally shrunk, slowly install the upper and lower clamping rings to ensure that the fluoroplastic retaining rings are embedded in the grooves.

[0016] S6. Tightening and Pressuring: Tighten the locking screw, place the fluoroplastic retaining ring into the heating box for a short time to shrink, and gradually tighten the locking screw, which will cause the upper and lower pressure rings to slowly press together until the locking screw is fully tightened.

[0017] S7. Shrinking and Shaping: After tightening the locking screw to the bottom, place it in a heating box and continue to keep it warm for no more than 3 hours. The fluoroplastic retaining ring shrinks and shapes under the action of compression and high temperature, which improves the fit with the parts.

[0018] S8. Natural cooling: After the heat preservation is completed, remove the upper and lower clamping rings after the fluoroplastic retaining rings have cooled naturally.

[0019] S9: Visual inspection: Inspect the shape of the fluoroplastic retaining ring and its fit with the part;

[0020] S10. Cleaning: Clean and dry with aviation cleaning agent to complete the assembly of fluoroplastic retaining ring.

[0021] Step S4 can also use a hot air gun with a temperature controlled within 175°C to heat the fluoroplastic retaining ring or connector, with the air outlet 50mm away from the heated part and the heating time not exceeding 10 minutes.

[0022] The beneficial effects of this invention are: during use, the upper and lower clamping rings can be controlled to slowly adhere to the fluoroplastic retaining ring, which is less likely to cause the fluoroplastic retaining ring to twist or deform. The tightening process of the locking screw is gradually compressed, and the operation is simple and convenient. At the same time, the clamping force can be controlled to gradually increase, ensuring that the fluoroplastic retaining ring is compressed into place. The operation is simple, the fault tolerance rate is high, and it is beneficial to improve assembly efficiency and quality. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the process structure of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the installation cross-sectional structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the assembly structure of the upper and lower clamping rings of the present invention;

[0028] Figure 5 This is a schematic diagram of the main structure of the upper clamping ring of the present invention;

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the upper compression ring of the present invention;

[0030] Figure 7 This is a schematic diagram of the main structure of the lower clamping ring of the present invention;

[0031] Figure 8 This is a schematic diagram of the three-dimensional structure of the lower clamping ring of the present invention;

[0032] Figure 9 This is a schematic diagram of the main structure of the locking screw of the present invention;

[0033] Figure 10 This is a three-dimensional structural diagram of the locking screw of the present invention;

[0034] Figure 11 This is a three-dimensional structural diagram of the fluoroplastic retaining ring of the present invention;

[0035] Reference numerals: 1. Upper clamping ring; 2. Lower clamping ring; 3. Locking screw; 4. Fluoroplastic retaining ring; 5. Part. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below.

[0037] like Figures 1 to 11 As shown, a closed-type fluoroplastic retaining ring assembly device includes an upper clamping ring 1 and a lower clamping ring 2 that are locked together by a locking screw 3. Both the upper clamping ring 1 and the lower clamping ring 2 are provided with inner grooves to facilitate pressing the fluoroplastic retaining ring 4 into the part 5. The design is based on the design dimensions of the fluoroplastic retaining ring 4 to ensure that the fluoroplastic retaining ring 4 is fully contracted in the locked state, thus ensuring that the fluoroplastic retaining ring 4 is pressed into the sealing groove of the part 5.

[0038] The upper clamping ring 1 and the lower clamping ring 2 fit into the fluoroplastic retaining ring 4 in a slow and controllable manner, making it less likely for the fluoroplastic retaining ring 4 to deform during the clamping process, and facilitating process inspection.

[0039] like Figure 3 As shown, the upper clamping ring 1 and the lower clamping ring 2 are fitted with the sealing groove of the part 5. The inner diameter of the upper clamping ring 1 and the lower clamping ring 2 is the same as the diameter of the sealing groove of the part 5. The inner groove diameter of the upper clamping ring 1 and the lower clamping ring 2 is the same as the outer diameter of the fluoroplastic retaining ring 4.

[0040] The lower clamping ring 2 and the locking screw 3 are threaded together, while the screw hole of the upper clamping ring 1 is unthreaded.

[0041] The widths of the upper clamping ring 1 and the lower clamping ring 2 are consistent with the width of the sealing groove, which facilitates the alignment and merging of the two halves, avoids misalignment during use, and prevents the fluoroplastic retaining ring 4 from twisting and deforming during the shrinkage and restoration of its shape.

[0042] The upper clamping ring 1 and the lower clamping ring 2 are semi-circular and have protruding blocks, which facilitates the connection and cooperation between the upper clamping ring 1 and the lower clamping ring 2.

[0043] like Figure 9 and Figure 10 As shown, the head of the locking screw 3 is provided with a protruding handle for easy manual disassembly and assembly.

[0044] A method for using a closed-type fluoroplastic retaining ring assembly device, the specific steps of which are as follows:

[0045] S1. Check the surface of the parts: Check that the neck surface of the part 5 that mates with the fluoroplastic retaining ring 4 is smooth and free of corrosive products. Check that the fluoroplastic retaining ring 4 is free of deformation, breakage, discoloration, and burrs at room temperature before installation.

[0046] S2. Heating the fluoroplastic retaining ring 4: Place the fluoroplastic retaining ring 4 in a heating box and heat it to 170±5℃. Install it when the fluoroplastic retaining ring 4 becomes soft and easily deformed.

[0047] S3. Hot installation: Wear heat-resistant gloves to remove the fluoroplastic retaining ring 4 and install it into the sealing groove while it is hot. Check that the protective ring is evenly distributed around the entire circumference of the sealing groove and that there are no defects.

[0048] S4. Heating and shrinkage: Place part 5 and fluoroplastic retaining ring 4 together in a heating box and heat at 170±5℃ for 5-10 minutes. Fluoroplastic retaining ring 4 will shrink naturally at the beginning.

[0049] S5. Installation and clamping: After the heating is completed and the body shrinks naturally, slowly install the upper clamping ring 1 and the lower clamping ring 2 to ensure that the fluoroplastic retaining ring 4 is embedded in the groove. At this time, both the upper and lower clamping devices should rotate flexibly to ensure that the fluoroplastic retaining ring 4 is not twisted, cut, or squeezed.

[0050] S6. Tightening and Pressuring: Tighten the locking screw 3. The fluoroplastic retaining ring 4 will deform and enlarge. At this time, the locking screw can be left untightened to the end. Apply a certain contraction force to the fluoroplastic retaining ring 4 and place it in the heating box for a short time to shrink it. Gradually tighten the locking screw 3, which will drive the upper pressure ring 1 and the lower pressure ring 2 to slowly press together until the locking screw 3 is fully tightened. During the process, pay attention to the pressing gap to prevent the fluoroplastic retaining ring 4 from twisting.

[0051] S7. Shrinking and Shaping: After tightening the locking screw 3 to the bottom, place it in the heating box and continue to keep it warm for no more than 3 hours. The fluoroplastic retaining ring 4 shrinks and shapes under the action of compression and high temperature, and the fit with the part 5 is improved.

[0052] S8. Natural cooling: After the heat preservation is completed, remove the upper clamping ring 1 and the lower clamping ring 2 after the fluoroplastic retaining ring 4 has cooled naturally.

[0053] S9: Visual inspection: Inspect the shape of the fluoroplastic retaining ring 4 and its fit with the part 5. The outer edge should be tucked into the sealing groove, and the outer surface should be flat, without burrs, damage, or discoloration.

[0054] S10. Cleaning: Clean and dry with aviation cleaning agent to complete the assembly of fluoroplastic retaining ring 4.

[0055] Step S4 can also use a hot air gun with a temperature controlled within 175°C to heat the fluoroplastic retaining ring 4 or the connector, with the air outlet 50mm away from the heated part and the heating time not exceeding 10 minutes.

[0056] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method of using a closed-type fluoroplastic retaining ring assembly device, characterized in that: A closed fluoroplastic retaining ring assembly device is used, which includes an upper clamping ring (1) and a lower clamping ring (2) that are locked together by a locking screw (3). Both the upper clamping ring (1) and the lower clamping ring (2) are provided with an inner groove to facilitate pressing the fluoroplastic retaining ring (4) into the part (5). The specific steps are as follows: S1. Check the surface of the parts: Check that the neck surface of the part (5) that mates with the fluoroplastic retaining ring (4) is smooth and free of corrosive products. Check that the fluoroplastic retaining ring (4) is free of deformation, breakage, discoloration and burrs at room temperature before installation. S2. Heating the fluoroplastic retaining ring (4): The fluoroplastic retaining ring (4) is placed in a heating box and heated to 170±5℃. It is installed when the fluoroplastic retaining ring (4) becomes soft and easily deformed. S3. Hot installation: Wear heat-resistant gloves to remove the fluoroplastic retaining ring (4) and install it into the sealing groove in the hot state. Check that the protective ring is evenly distributed on the circumference of the entire sealing groove and that there are no defects. S4. Heating and shrinkage: Place the part (5) and the fluoroplastic retaining ring (4) together in the heating box and heat at 170±5℃ for 5-10 minutes. The fluoroplastic retaining ring (4) will shrink naturally in the initial stage. S5. Installation and clamping: After the heating is completed and the body naturally shrinks, slowly install the upper clamping ring (1) and the lower clamping ring (2) to ensure that the fluoroplastic retaining ring (4) is embedded in the groove; S6. Tightening and Pressuring: Tighten the locking screw (3), put the fluoroplastic retaining ring (4) into the heating box for short-term heat preservation and shrink it, gradually tighten the locking screw (3), and drive the upper pressure ring (1) and the lower pressure ring (2) to slowly press together until the locking screw (3) is tightened to the bottom. S7. Shrinking and shaping: After tightening the locking screw (3) to the bottom, put it into the heating box and continue to keep it warm for no more than 3 hours. The fluoroplastic retaining ring (4) shrinks and shapes under the action of compression and high temperature, and the fit with the parts (5) is improved. S8. Natural cooling: After the heat preservation is completed, remove the upper clamping ring (1) and the lower clamping ring (2) after the fluoroplastic retaining ring (4) has cooled naturally. S9: Visual inspection: Inspect the shape of the fluoroplastic retaining ring (4) and its fit with the part (5), with the outer edge tucked into the sealing groove; S10. Cleaning: Clean and dry with aviation cleaning agent to complete the assembly of fluoroplastic retaining ring (4).

2. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: Step S4 can also use a hot air gun with a temperature controlled within 175 ℃ to heat the fluoroplastic retaining ring (4) or the connector, with the air outlet 50 mm away from the heated part and the heating time not exceeding 10 min.

3. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: Both the upper clamping ring (1) and the lower clamping ring (2) are semi-circular.

4. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: The upper clamping ring (1) and the lower clamping ring (2) are fitted with the sealing groove of the part (5). The inner diameter of the upper clamping ring (1) and the lower clamping ring (2) is consistent with the diameter of the sealing groove of the part (5). The inner groove diameter of the upper clamping ring (1) and the lower clamping ring (2) is consistent with the outer diameter of the fluoroplastic retaining ring (4).

5. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: The lower clamping ring (2) and the locking screw (3) are threaded together, while the screw hole of the upper clamping ring (1) is unthreaded.

6. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: The width of the upper clamping ring (1) and the lower clamping ring (2) is consistent with the width of the sealing groove.

7. The method of using the closed-end fluoroplastic retaining ring assembly device according to claim 1, characterized in that: The head of the locking screw (3) is provided with a protruding handle for easy manual disassembly and assembly.

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