Device and method for preventing and controlling machining redundancies of spherical shell assembly of starting box

Abstract

The invention relates to a device and method for preventing and controlling machining redundancy of a spherical shell assembly of a starting box. The device comprises a tensioning screw, a pressing plate, a supporting plate and a sealing ring. The tensioning screw is installed on the supporting plate and used for controlling the distance between the pressing plate and the supporting plate. The pressing plate is mounted on the surface of the sealing ring; the inner hole and the end face of the sealing ring are contacted and limited, so that the sealing ring is pressed and fixed; the supporting plate is installed on the conical surface of an inner hole of the sealing ring and used for opening the sealing ring. The sealing ring is installed between the pressing plate and the supporting plate, contact limiting is carried out through the end face of the pressing plate and the outer conical surface of the supporting plate, then the surface of an inner cavity of the shell assembly is contacted, and sealing and protection of the inner cavity of the shell assembly are achieved.

Description

Technical Field

[0001] The present application belongs to the field of liquid rocket engine manufacturing technology, and specifically relates to a device and method for preventing and controlling excess materials in the processing of a spherical shell assembly of a liquid rocket engine starting box. Background Art

[0002] For rocket engines that use direct-flow liquids such as liquid oxygen / hydrocarbons and liquid oxygen / liquid hydrogen, when processing the starting boxes, tanks, etc. that involve spherical shell structures, it is difficult to clean excess materials in these parts due to the presence of filters, pipes, intersecting holes and other structures inside the shell. Therefore, when operators are processing the shell connection flanges, interfaces and other parts, they need to protect the inner cavity to prevent excess materials generated during processing from entering the shell, making it difficult to clean and the operation more difficult, increasing product production time, low production efficiency, and creating great quality risks.

[0003] A common method for preventing debris from entering the housing cavity is to apply customer-approved protective tape around all structural lightening holes. This method is labor-intensive and time-consuming, and the tape cannot be reused, resulting in significant waste. Furthermore, if workers are careless or negligent, the tape itself can become debris and enter the housing.

[0004] Based on this, it is necessary to design a new type of excess material prevention and control device to prevent the occurrence of excess material during processing, facilitate operators to quickly load and unload, improve production efficiency, and save production costs. Summary of the Invention

[0005] The technical problem solved by the present invention is: to overcome the shortcomings of the existing technology and provide a device and method for preventing and controlling excess objects in the processing of a spherical shell assembly of a starter box. The device can not only effectively prevent excess objects from entering the interior of the starter, but also reduce the labor intensity of the operating workers, facilitate the workers' installation and disassembly, improve production efficiency, and reliably guarantee the production efficiency and quality performance requirements of the assembly.

[0006] The technical solution of the present invention is: a device for preventing and controlling excess materials from being processed in a spherical shell assembly of a starter box, comprising a tightening screw, a pressing plate, a supporting plate and a sealing ring;

[0007] The tightening screw is installed on the support plate and is used to control the distance between the pressure plate and the support plate;

[0008] The pressure plate is installed on the surface of the sealing ring; the inner hole and the end surface of the sealing ring are contacted and limited to achieve the compression and fixation of the sealing ring;

[0009] The support plate is mounted on the conical surface of the inner hole of the sealing ring and is used to support the sealing ring;

[0010] The sealing ring is installed between the pressure plate and the support plate, and is limited by the contact between the end face of the pressure plate and the outer conical surface of the support plate, and then contacts the inner cavity surface of the shell component to achieve sealing and protection of the inner cavity of the shell component.

[0011] The length of the tightening screw is less than the total thickness of the pressure plate, support plate and sealing ring, and the length is at least enough to be screwed into the support plate. Then, when the tightening screw is tightened, the hexagonal end face of the tightening screw thread can contact the pressure plate, thereby tightening the pressure plate and support plate.

[0012] The pressing plate and one side of the corresponding supporting plate are parallel to each other and do not interfere with each other.

[0013] A hole is opened in the center of the pressure plate, the diameter of the hole is larger than the tightening screw, and the tightening screw is connected to the support plate through the hole.

[0014] The outer circle of the pressure plate is a step structure, which cooperates with the sealing ring and is used to limit the other end surface of the sealing ring during the expansion process of the sealing ring.

[0015] A threaded hole is provided in the middle of the support plate for cooperating with a tightening screw to tighten the thread.

[0016] The outer circle of the support plate is provided with a 30° to 45° inclined surface for matching the inclined surface of the inner hole of the sealing ring. When the support plate is subjected to the tension of the tightening screw in the axial direction, it plays the role of opening the sealing ring.

[0017] The end of the sealing ring in contact with the pressure plate is provided with a step for cooperating with the step end surface of the pressure plate for positioning.

[0018] The inner hole of the sealing ring is provided with a bevel, the angle of which is equal to the angle of the outer circle bevel of the support plate, and is used for contacting and cooperating with the outer bevel of the support plate and can be opened by the support plate.

[0019] A method for prevention and control using the device, comprising:

[0020] Install the support plate inward into the inner cavity of the shell assembly, screw in the tightening screw, and reduce the distance between the pressure plate and the support plate through transmission. The support plate makes the sealing ring expand evenly and closely contact the inner cavity of the shell to ensure the sealing of the inner cavity of the shell and prevent the entry of excess materials generated by processing;

[0021] Tighten the screws, increase the distance between the pressure plate and the support plate through transmission, and the sealing ring will evenly return to its original shape, thus disassembling the device.

[0022] The beneficial effects of the present invention compared with the prior art are: the present invention combines a tightening screw, a pressure plate, a support plate, and a sealing ring to form a device for preventing and controlling excess material during processing of a spherical shell assembly of a starting box. The installation and disassembly of the device are achieved by tightening the screws. The device can flexibly adapt to the prevention and control of excess material during processing of spherical inner cavities of different specifications. The device is convenient and quick to disassemble. During the processing process, effective protection is achieved against processing excess material entering the inner cavity of the shell, thereby achieving the effect of improving labor efficiency and increasing product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall structural view of a device for preventing and controlling excess material during processing of a spherical shell component of a starter box.

[0024] Figure 2 Schematic diagram of the support plate structure.

[0025] Figure 3 Schematic diagram of the sealing ring structure.

[0026] Figure 4 Schematic diagram of the pressure plate structure. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, the present invention provides a device for preventing and controlling excess materials from being processed in a spherical shell assembly of a starter box, comprising a tightening screw 1, a pressing plate 2, a supporting plate 3, and a sealing ring 4;

[0028] The tightening screw 1 is tightened on the support plate 3 to control the distance between the pressing plate 2 and the support plate 3. When the tightening screw 1 is tightened, the pressing plate 2 is close to the support plate 3. When the tightening screw 1 is loosened, the pressing plate 2 returns to its initial state under the elastic force of the plastic ring 4, thereby causing the pressing plate 2 to move away from the support plate 3.

[0029] The pressure plate 2 is mounted on the surface of the sealing ring 4 and is contacted and limited by the inner hole and end surface of the sealing ring 4 to press and fix the sealing ring 4;

[0030] The support plate 3 is installed on the conical surface of the inner hole of the sealing ring 4 and is used to support the sealing ring 4;

[0031] The sealing ring 4 is installed between the pressure plate 2 and the support plate 3, and is limited by the end face of the pressure plate 2 and the outer conical surface of the support plate 3. It is used to contact the inner surface of the shell and play a role in sealing and protecting the inner cavity of the shell.

[0032] The length of the tightening screw 1 should be less than the sum of the thicknesses of the pressure plate 2, the support plate 3, and the sealing ring 4, and the length should be at least enough to be screwed into the support plate 3, so that when the tightening screw 1 is tightened, the hexagonal end face of the tightening screw 1 thread can contact the pressure plate, thereby tightening the pressure plate 2 and the support plate 3;

[0033] like Figure 4 As shown, the pressure plate 2 and one side of the corresponding support plate 3 are parallel to each other and do not interfere with each other. A hole is opened in the center, and the diameter of the hole is slightly larger than the tightening screw 1, which is used to connect the tightening screw 1 to the support plate 3 through the hole. The outer circle is designed as a step structure, which is used to cooperate with the sealing ring 4, and plays a role in limiting the other end face of the sealing ring 4 during the expansion process of the sealing ring 4.

[0034] like Figure 2 As shown, a threaded hole is provided in the middle of the support plate 3 for threaded tightening with the tightening screw 1, and is parallel to the end face of the corresponding pressure plate 2 without interfering with each other. The outer circle of the support plate 3 is provided with a 30°~45° inclined surface for cooperating with the inclined surface of the inner hole of the sealing ring 4. When the support plate 3 is subjected to the tension of the tightening screw 1 in the axial direction, it plays the role of supporting the sealing ring 4.

[0035] like Figure 3 As shown, the sealing ring 4 is typically made of polytetrafluoroethylene plastic. The end that contacts the pressure plate 2 is provided with a step for aligning with the stepped end surface of the pressure plate 2 for position limiting. The inner hole of the sealing ring 4 is provided with a bevel, the angle of which is equal to the bevel angle of the outer circle of the support plate 3. This bevel is used to contact and mate with the outer bevel of the support plate 3 and can be supported by the support plate 3. When unstressed, the outer diameter of the sealing ring 4 matches the inner diameter of the housing, with a clearance of 0.1 to 0.2 mm to ensure both easy installation and satisfactory sealing.

[0036] A method for controlling the device, comprising:

[0037] Step 1. Install the support plate 3 of the excess material prevention and control device inward into the inner cavity of the shell, screw in the tightening screw 1, reduce the distance between the pressure plate 2 and the support plate 3 through transmission, and the support plate 3 makes the sealing ring 4 expand evenly. Visually check to confirm that the sealing ring 4 is in close contact with the inner wall of the shell, so that the device can seal the inner cavity of the shell, which can prevent excess materials generated during processing from entering the inner cavity of the shell.

[0038] Step 2: Tighten screw 1, increasing the distance between pressure plate 2 and support plate 3 through transmission, and evenly restore the sealing ring 4 to its original shape, thus disassembling the device. After using the debris guard, immediately check whether the debris guard is complete. If it is incomplete, identify the missing parts until they are found. This will prevent the missing parts from becoming debris and causing starter malfunction.

[0039] Applying this waste prevention and control device to the rocket engine starter structure can not only effectively prevent waste from entering the starter during the processing process, but also reduce the labor intensity of operators and improve production efficiency. At the same time, this invention replaces the traditional method of using protective tape for protection, saves the amount of protective tape, and reduces the production cost of the aircraft.

[0040] Those skilled in the art should understand that the above embodiments are merely exemplary embodiments, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention.

[0041] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

Claims

1. A device for preventing and controlling excess material during machining of a spherical shell assembly of a starter box, characterized in that: It comprises a tightening screw (1), a pressing plate (2), a supporting plate (3) and a sealing ring (4); The tightening screw (1) is mounted on the support plate (3) and is used to control the distance between the pressure plate (2) and the support plate (3); The pressure plate (2) is mounted on the surface of the sealing ring (4); the sealing ring (4) is pressed and fixed by contacting and limiting the inner hole and the end surface of the sealing ring (4); The support plate (3) is mounted on the conical surface of the inner hole of the sealing ring (4) and is used to support the sealing ring (4); The sealing ring (4) is installed between the pressure plate (2) and the support plate (3), and is limited by the contact between the end surface of the pressure plate (2) and the outer conical surface of the support plate (3), thereby contacting the inner cavity surface of the shell component to achieve sealing and protection of the inner cavity of the shell component.

2. The device for preventing and controlling excess material during machining of a spherical shell assembly of a starter box according to claim 1, characterized in that: The length of the tightening screw (1) is less than the sum of the thicknesses of the pressure plate (2), the support plate (3), and the sealing ring (4), and the length is at least sufficient to be screwed into the support plate (3), so that when the tightening screw (1) is tightened, the hexagonal end face of the tightening screw (1) thread can contact the pressure plate, thereby tightening the pressure plate (2) and the support plate (3).

3. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 1, characterized in that: The pressing plate (2) and one side of the corresponding supporting plate (3) are parallel to each other and do not interfere with each other.

4. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 1, characterized in that: The center of the pressure plate (2) is provided with a hole, the diameter of which is larger than the tightening screw (1), and the tightening screw (1) is connected to the support plate (3) through the hole.

5. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 4, characterized in that: The outer circle of the pressure plate (2) is a step structure, which cooperates with the sealing ring (4) and is used to limit the other end surface of the sealing ring (4) during the process of the sealing ring (4) being stretched.

6. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 4, characterized in that: A threaded hole is provided in the middle of the support plate (3) for cooperating with the tightening screw (1) to tighten the thread.

7. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 1, characterized in that: The outer circle of the support plate (3) is provided with a 30° to 45° inclined surface for matching the inclined surface of the inner hole of the sealing ring (4). When the support plate (3) is subjected to the tension of the tightening screw (1) in the axial direction, it plays the role of opening the sealing ring (4).

8. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 1, characterized in that: The end of the sealing ring (4) in contact with the pressure plate (2) is provided with a step for cooperating with the step end surface of the pressure plate (2) for position limiting.

9. The device for preventing and controlling excess materials during processing of a spherical shell assembly of a starter box according to claim 1, characterized in that: The inner hole of the sealing ring (4) is provided with an inclined surface, the angle of which is equal to the angle of the outer circular inclined surface of the support plate (3), and is used for contacting and cooperating with the outer inclined surface of the support plate (3) and can be stretched open by the support plate (3).

10. A method for prevention and control using the device according to claim 1, characterized in that: include: The support plate (3) is installed inwardly into the inner cavity of the shell assembly, and the tightening screw (1) is screwed in. The distance between the pressure plate (2) and the support plate (3) is reduced by transmission. The support plate (3) causes the sealing ring (4) to expand evenly and contact the inner cavity of the shell tightly, thereby ensuring the sealing of the inner cavity of the shell and preventing the entry of excess materials generated by processing; Tighten the screw (1), increase the distance between the pressure plate (2) and the support plate (3) through transmission, and the sealing ring (4) evenly returns to its original state, thereby disassembling the device.

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