Limiting device and method for assembly of engine fuel manifold clamp

Abstract

The invention provides an engine fuel manifold hoop assembly limiting device and method.The engine fuel manifold hoop assembly limiting device comprises a first limiting part, a second limiting part and a handheld part, the first limiting part is connected to one side of the second limiting part, and the handheld part is connected to the top of the second limiting part; the first limiting part is used for being arranged on a flame tube supporting pin fastening screw in a sleeving mode to achieve first-step limiting, the position of the second limiting part is determined according to the spatial position of the clamp relative to the flame tube supporting pin fastening screw, and the second limiting part is used for being clamped on fuel oil branch pipes on the two sides of the clamp to achieve radial fixing of the clamp. The handheld part is used for effectively applying force to the first limiting part and the second limiting part. According to the limiting device, the fuel main pipe clamp is effectively limited, the clamp is prevented from sliding when a clamp fastening screw is tightened, and it is ensured that one-time assembly is in place.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine technology, specifically to an engine fuel manifold clamp assembly limiting device and method. Background Technology

[0002] As a core component of power equipment such as aero engines, the stability and reliability of the combustion chamber are crucial to the operation of the entire system. The combustion chamber structure includes key components such as the combustion chamber casing, flame tube, and fuel manifold. The flame tube is securely fixed to the combustion chamber casing by circumferentially distributed flame tube support pins, ensuring stability and safety during combustion. Each flame tube support pin has two fastening screws: the one on the left (counter-clockwise) is specifically designed for the flame tube support pin, while the one on the right (counter-clockwise) serves to secure both the flame tube support pin and the fuel manifold clamp. The fuel manifold clamp features a split design, with the upper and lower halves tightly fitted onto the fuel manifold branches and firmly connected to the combustion chamber casing by fastening screws. The primary purpose of this design is to tighten the fuel manifold, preventing impacts due to engine vibration during operation, thereby ensuring the stability and safety of fuel supply.

[0003] However, a significant problem exists during the assembly of the fuel manifold clamp. Because the clamp lacks a restraining mechanism along the fuel manifold branch direction when the fastening screws are tightened, it slips circumferentially as the screws rotate. Simultaneously, the difference in friction experienced by the two halves of the clamp during assembly often leads to misalignment and displacement, making it difficult to guarantee the assembly quality. This problem not only affects the performance stability of the combustion chamber but may also pose a potential threat to the overall operational safety of the engine.

[0004] To address these issues, a current assembly strategy involves one operator tightening the clamp's fastening screws while another operator uses a screwdriver to press the clamp against the movement of the clamp, preventing slippage and misalignment. However, this strategy has several shortcomings in practical application. Because the fastening screws require significant tightening torque, and the contact area between the screwdriver and the clamp is relatively small, the stopping effect is not ideal. This often leads to multiple rework steps to ensure proper clamp assembly, with assembly times for a single machine reaching approximately 4 hours, severely impacting production efficiency.

[0005] Furthermore, existing assembly strategies have other problems. Because the contact area between the screwdriver and the clamp is small, and significant force is required to prevent slippage, the clamp's sides are easily damaged, affecting its service life and performance stability. Simultaneously, the screwdriver may also scratch the fuel line surface during operation, posing a potential threat to fuel supply safety. These problems not only increase maintenance and replacement costs but may also adversely affect the overall engine operating safety. Therefore, it is necessary to improve and optimize existing assembly strategies to enhance clamp assembly quality and efficiency while ensuring engine operating safety. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides an engine fuel manifold clamp assembly limiting device and method, applicable to the assembly of fuel manifold clamps for aero engines, which effectively limits the fuel manifold clamp, prevents clamp slippage when tightening the clamp fastening screws, and ensures proper assembly in one go.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an engine fuel manifold clamp assembly limiting device, comprising a first limiting part, a second limiting part, and a hand-held part. The first limiting part is connected to one side of the second limiting part, and the hand-held part is connected to the top of the second limiting part. The first limiting part is used to be fitted onto the flame tube support pin fastening screw to achieve the first step of limiting. The position of the second limiting part is determined according to the spatial position of the clamp relative to the flame tube support pin fastening screw. The second limiting part is used to be clamped onto the fuel branch pipes on both sides of the clamp to achieve radial fixation of the clamp. The hand-held part is used to effectively apply force to the first limiting part and the second limiting part.

[0008] Furthermore, the flame tube support pin fastening screw is a screw used to fix the flame tube support pin on the right side of the engine in the reverse direction. A limiting reference hole is provided on the first limiting part. The limiting reference hole is used to fit onto the fastening screw for fixing the flame tube support pin to achieve the first step of limiting. Furthermore, the bottom of the flame tube support pin is a fuel nozzle, and the side of the first limiting part is provided with a cut surface to avoid assembly interference with the fuel nozzle.

[0009] Furthermore, the second limiting part includes a clamp fixing part and two latches respectively disposed on both sides of the clamp fixing part. The clamp fixing part is used to clamp the clamp in the radial direction. The latches are the same width as the clamp in the circumferential direction and the same diameter as the fuel pipe. The two latches are respectively clamped on the fuel pipes on both sides of the clamp sliding direction. The positions of the two latches are determined according to the spatial position of the clamp relative to the fastening screw of the flame tube support pin.

[0010] Furthermore, extension sections are provided at the top of the clamp fixing part and the top of the bayonet, and the handle part is vertically connected to the extension section.

[0011] Furthermore, the bayonet is a semi-open bayonet, with the opening direction consistent with the direction in which the first limiting part is fitted onto the fastening screw of the flame tube support pin.

[0012] Furthermore, the handheld part is a straight handle.

[0013] Furthermore, the first limiting part, the second limiting part, and the hand-held part are integrated into one unit.

[0014] The present invention also provides a limiting method for assembling engine fuel manifold clamps, wherein the above-mentioned engine fuel manifold clamp assembly limiting device is used for assembling the fuel manifold clamps.

[0015] Furthermore, the specific steps are as follows: Use the flame tube support pin to fix the flame tube to the combustion chamber casing, and install the flame tube support pin fastening screw on the left side of the engine counter-current direction to fix the flame tube support pin. Install a clamp on the fuel line and temporarily secure the clamp using the engine reverse right clamp fastening screw; Place the first limiting part on the fastening screw of the flame tube support pin, wrap the second limiting part around both sides of the sliding direction of the clamp on the fuel pipe, and then tighten the first limiting part and the second limiting part radially along the handle to limit the clamp. Tighten the clamp fastening screws to complete the clamp installation.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: This invention provides an engine fuel manifold clamp assembly limiting device comprising a first limiting part, a second limiting part, and a handheld part. The first limiting part is fitted onto the flame tube support pin fastening screw to complete the first step of positioning. The second limiting part is engaged with the fuel branch pipes on both sides of the clamp according to the spatial position of the clamp, achieving radial fixation of the clamp. The double limiting structure solves the problem of clamp stopping when tightening the fastening screw, ensuring effective clamp limiting. The handheld part can effectively apply force to the first and second limiting parts. The overall design conforms to operational logic, requires no complex learning cost, and is simple and convenient to operate. This invention is specifically designed for the assembly scenario of aero-engine fuel manifold clamps, and can accurately match the spatial assembly relationship between the flame tube support pin fastening screw, fuel branch pipes, and clamp, avoiding the problem of poor adaptability of general devices and ensuring the professionalism and stability of aero-engine assembly.

[0017] This invention provides an engine fuel manifold clamp assembly limiting device that achieves limited assembly of the fuel manifold clamp, significantly improving assembly efficiency. Because the device effectively limits the clamp, it avoids time-consuming operations such as rework and adjustment caused by clamp slippage during assembly, increasing the assembly efficiency of a single clamp by approximately 87.5%, significantly shortening the assembly cycle and reducing production time costs. Traditional assembly may require multiple people to cooperate in positioning, applying force, and tightening, while this method, relying on the device's precise limiting and convenient operation, requires only one person to complete the assembly process, reducing the required assembly personnel from two to one, lowering labor costs and minimizing personnel coordination errors. During assembly, the device, through stable limiting action, prevents the clamp from colliding or rubbing against other parts (such as fuel manifolds and flame tube support pins) when slipping, eliminating the risk of damage to parts during assembly and ensuring the integrity of parts and the reliability of the assembled product. The device's dual-limiting structure provides a stable positioning reference for assembly, eliminating the need for repeated clamp position adjustments when tightening screws, allowing assembly and tightening to be completed in one go, reducing the number of assembly steps and mitigating problems such as part wear and decreased assembly accuracy caused by repeated assembly. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the fuel main pipe clamp assembly. Figure 2 Structural design drawing for the fuel main pipe clamp assembly limit device; Figure 3 Schematic diagram of the fuel main pipe clamp assembly and limiting method; In the diagram: 1. Limiting reference hole; 2. Bayonet; 3. Straight handle; 4. Combustion chamber housing; 5. Fuel main pipe; 6. Clamp; 7. Flame tube support pin; 8. Flame tube support pin fastening screw; 9. Clamp fastening screw; 10. Fuel branch pipe; 11. Fuel nozzle. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

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

[0025] This invention provides an engine fuel manifold clamp assembly limiting device, comprising an integrally formed first limiting part, a second limiting part, and a handheld part. The first limiting part is connected to one side of the second limiting part, and the handheld part is connected to the top of the second limiting part. A limiting reference hole 1 is provided on the first limiting part for fitting onto the fixing screw 8 of the fixed flame tube support pin to achieve the first step of limiting. The second limiting part includes a clamp fixing part, and half-open bayonet 2 is provided on both sides of the clamp fixing part. The length of the clamp fixing part is the same as the circumferential width of the clamp 6, and the size of the bayonet 2 matches the fuel branch pipes 10 on both sides of the clamp 6. An extension section is provided at the top of the clamp fixing part and the top of the bayonet 2, and the handheld part is perpendicularly connected to the extension section.

[0026] (I) The present invention provides a specific setting for an engine fuel main pipe clamp assembly limiting device: like Figure 1 As shown, this invention uses the flame tube support pin fastening screw 8 as a base point and designs a limiting reference hole 1 on the clamp assembly limiting device. Along the engine's reverse direction, the left flame tube support pin fastening screw 8 is enclosed, while the right clamp fastening screw 9, shared with the clamp, is left open. This ensures effective stopping while facilitating the installation and tightening of the clamp fastening screw 9. To avoid the fuel nozzle 11, the side of the limiting reference hole 1 is chamfered. Simultaneously, a locking slot 2 with the same circumferential width as the clamp 6 and the same diameter as the fuel pipe 10 is designed for limiting. The slot is semi-open for easy installation, and its position is determined based on the spatial position of the clamp 6 relative to the flame tube support pin fastening screw 8. Furthermore, the handle is designed as a straight handle 3 for effectively applying force to the limiting device, such as... Figure 2 As shown. To ensure strength, the clamp assembly and limiting device of this invention adopts an integrated design and processing.

[0027] (2) Limiting method for fuel main pipe clamp assembly (e.g.) Figure 3 (as shown) Step 1: Use the flame tube support pin 7 to fix the flame tube to the combustion chamber casing 4, and install the flame tube support pin fastening screw 8 on the left side of the engine reverse direction to fix the flame tube support pin 7. Step 2: Use the engine to reverse the direction to the right side of the clamp fastening screw 9 to temporarily fix the clamp 6. When fixing, ensure that the two halves of the clamp 6 are basically aligned. Step 3: Install the clamp assembly limiting device, so that its limiting reference hole 1 is fitted onto the engine's reverse-direction left flame tube support pin fastening screw 8, and the bayonet 2 is wrapped around the two sides of the sliding direction of the clamp 6 on the fuel distribution pipe 10. Then, tighten the limiting device radially along the straight handle 3 to achieve the limiting of the clamp and ensure that the clamp 6 will not slip as the fastening screw rotates during the tightening of the clamp fastening screw 9. Step 4: Use a socket wrench to tighten the right-side clamp fastening screw 9 to complete the clamp installation.

[0028] Example 1 An engine fuel main pipe clamp assembly limiting device consists of a limiting reference hole 1, a bayonet 2, and a straight handle 3, and is manufactured as a single integrated unit. The steps are as follows: (1) Design of limit device scheme The design of the limiting reference hole 1: Using the flame tube support pin fastening screw 8 as the positioning reference, the limiting reference hole 1 cleverly surrounds the left flame tube support pin fastening screw 8 along the engine's reverse direction. Simultaneously, the right side is open, reserving operating space for the clamp fastening screw 9 shared with the clamp. This achieves effective stopping function and greatly facilitates the installation and tightening force-limiting operation of the clamp fastening screw 9. Furthermore, the side of the limiting reference hole 1 undergoes fine surface treatment, cleverly avoiding the fuel nozzle 11 and preventing interference during assembly. This component is recommended to be made of high-strength stainless steel, such as 304 or 316 stainless steel, to ensure stability and durability under high temperature and high pressure environments. Precision CNC machining ensures the dimensional accuracy and surface finish of the limiting reference hole 1, reducing friction and wear during assembly.

[0029] Limiting jaw 2 design: Based on the circumferential width of clamp 6 and the diameter of fuel manifold 10, the dimensions of limiting jaw 2 are precisely designed to ensure a tight fit with clamp 6 and fuel manifold. Jaw 2 adopts a semi-open design for easy and quick installation. Its specific position is precisely determined based on the spatial position of clamp 6 relative to the flame tube support pin fastening screw 8 to ensure assembly accuracy and stability. High-strength stainless steel is also recommended for jaw 2, consistent with the limiting reference hole 1, to ensure the strength and coordination of the overall structure. The inner surface of jaw 2 can be hard chrome plated to improve wear resistance and corrosion resistance, extending service life. Electrical discharge machining (EDM) or laser cutting technology is used to ensure the precision and edge smoothness of jaw 2, preventing scratches on clamp or fuel manifold during assembly.

[0030] Straight Handle 3 Design: As the force-applying component, the straight handle 3 is designed with ergonomic principles in mind, ensuring that operators can easily and comfortably apply sufficient force to the limiting device for precise positioning. The straight handle 3 and the main body of the limiting device are integrally machined, eliminating the need for additional connecting parts, simplifying the structure and improving overall strength. The handle surface can be treated with an anti-slip finish, such as knurling or spraying an anti-slip coating, to enhance operational safety. The handle can also be made of the same high-strength stainless steel as the main body; if separate manufacturing is necessary due to processing limitations, high-temperature alloy steel bolts can be used for connection, with the bolt material matching the main body to ensure connection strength and thermal compatibility. A high-temperature anti-seize agent can be applied to the connection points to prevent the bolts from loosening or seizing at high temperatures.

[0031] (2) Limiting method for assembling fuel main pipe clamps When using the limiting device of the fuel main pipe 5 clamp assembly of the present invention, the initial fixing of the flame tube must first be completed: the flame tube support pin 7 is accurately inserted into the corresponding mounting hole of the combustion chamber casing, and its installation is ensured by rotation or axial push. Then, the flame tube support pin fastening screw 8 on the left side of the engine counter-current direction is used to firmly fix the flame tube support pin 7 on the combustion chamber casing with the specified torque. At this time, the flame tube is initially positioned in the axial and circumferential directions of the engine.

[0032] Next, pre-install clamp 6 by joining the two halves of clamp 6 at the designated position on the fuel manifold 10 and temporarily fixing them with the clamp fastening screw 9 on the right side of the engine's reverse direction. During the fixing process, the position of the two halves of clamp 6 needs to be carefully adjusted to ensure that they are basically aligned. The gap between the inner diameter of clamp 6 and the outer diameter of fuel manifold 10 should be uniform, generally controlled within 0.1mm-0.3mm, to ensure that clamp 6 can fit tightly against fuel manifold 10 without hindering subsequent limiting operations.

[0033] After pre-installing the clamp 6, the limiting device is installed. The diameter of the limiting reference hole 1 of this limiting device is designed to be 0.1mm-0.2mm larger than the nominal diameter of the engine's reverse-direction left-side flame tube support pin fastening screw 8. This size design ensures that the limiting reference hole 1 can be smoothly fitted onto the flame tube support pin fastening screw 8, and also achieves precise positioning through a slight interference fit, preventing the limiting device from shaking during operation. Fit the limiting reference hole 1 of the limiting device onto the fixed engine's reverse-direction left-side flame tube support pin fastening screw 8, ensuring that the installation direction of the limiting device is correct, and that the opening direction of its bayonet 2 is perpendicular to the sliding direction of the clamp 6. The inner diameter of the bayonet 2 is designed according to the outer diameter of the fuel manifold 10, and its inner diameter is 0.1mm-0.3mm larger than the outer diameter of the fuel manifold 10. This size design allows the bayonet 2 to easily wrap around the fuel manifold 10 on both sides of the sliding direction of the clamp 6, while providing sufficient friction to limit the sliding of the clamp 6. When wrapping the fuel manifold 10, it is necessary to ensure that the clamp 2 fits tightly with the fuel manifold 10 and the clamp 6, without any obvious gaps or offsets.

[0034] After the limiting reference hole 1 and the bayonet 2 of the limiting device are correctly installed, the operator holds the straight handle 3. The straight handle 3 is designed to be 150mm-200mm long and 20mm-30mm in diameter, which is convenient for the operator to grip and apply force. Gradually tighten the limiting device along the radial direction of the straight handle 3. The amount of force applied is adjusted according to the actual situation. Generally, it is advisable to feel sufficient friction between the limiting device and the fuel manifold 10 and the flame tube support pin fastening screw 8, and for the limiting device to no longer move relative to the other. Through the radial tightening force of the straight handle 3, the limiting device firmly restricts the clamp 6 to the current position, ensuring that the clamp 6 will not slip as the clamp fastening screw 9 rotates during the tightening of the clamp fastening screw 9 on the right side of the engine reverse direction, thus ensuring the accuracy and stability of the clamp 6 installation.

[0035] Finally, use a socket wrench of appropriate size to tighten the clamp fastening screw 9, gradually tightening it according to the engine's specified tightening torque. During the tightening process, observe the status of the limit device and the clamp 6 to ensure no abnormalities occur. Once the clamp fastening screw 9 is tightened to the specified torque, the clamp 6 is securely installed on the fuel manifold 10. At this point, slowly loosen the straight handle 3, remove the limit device, and complete the installation process of the clamp 6.

[0036] This clamp assembly limiting device is simple to operate and easy to use, allowing for independent operation by a single person. It solves the problem of clamp stopping when tightening fastening screws, effectively limiting the clamp and ensuring proper assembly in one go. The assembly efficiency of a single clamp unit is increased by approximately 87.5%, while eliminating the risk of damage to parts during assembly. This clamp assembly limiting device has high potential for widespread adoption.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An engine fuel main pipe clamp assembly limiting device, characterized in that, It includes a first limiting part, a second limiting part, and a hand-held part. The first limiting part is connected to one side of the second limiting part, and the hand-held part is connected to the top of the second limiting part. The first limiting part is used to be sleeved on the flame tube support pin fastening screw (8) to achieve the first step of limiting. The position of the second limiting part is determined according to the spatial position of the clamp (6) relative to the flame tube support pin fastening screw (8). The second limiting part is used to be clamped on the fuel branch pipes (10) on both sides of the clamp (6) to achieve radial fixation of the clamp (6). The hand-held part is used to effectively apply force to the first limiting part and the second limiting part.

2. The engine fuel main pipe clamp assembly limiting device according to claim 1, characterized in that, The flame tube support pin fastening screw (8) is a screw used to fix the flame tube support pin (7) on the right side of the engine in the reverse direction. A limiting reference hole (1) is provided on the first limiting part. The limiting reference hole (1) is used to be sleeved on the fixing flame tube support pin fastening screw (8) to achieve the first step of limiting.

3. The engine fuel main pipe clamp assembly limiting device according to claim 1, characterized in that, The bottom of the flame tube support pin (7) is the fuel nozzle (11), and the side of the first limiting part is provided with a cut surface to avoid assembly interference with the fuel nozzle (11).

4. The engine fuel main pipe clamp assembly limiting device according to claim 1, characterized in that, The second limiting part includes a clamp fixing part and two slots (2) respectively provided on both sides of the clamp fixing part. The clamp fixing part is used to clamp the clamp (6) in the radial direction. The slots (2) have the same width as the clamp (6) in the circumferential direction and the same diameter as the fuel pipe (10). The two slots (2) are respectively clamped on the fuel pipes (10) on both sides of the sliding direction of the clamp (6). The position of the two slots (2) is determined according to the spatial position of the clamp (6) relative to the fastening screw (8) of the flame tube support pin.

5. The engine fuel main pipe clamp assembly limiting device according to claim 4, characterized in that, An extension section is provided at the top of the clamp fixing part and the top of the bayonet (2), and the hand-held part is vertically connected to the extension section.

6. The engine fuel main pipe clamp assembly limiting device according to claim 4, characterized in that, The bayonet (2) is a semi-open bayonet, and the opening direction is consistent with the direction of the first limiting part being fitted onto the fastening screw (8) of the flame tube support pin.

7. The engine fuel main pipe clamp assembly limiting device according to claim 1, characterized in that, The hand-held part is a straight handle (3).

8. The engine fuel main pipe clamp assembly limiting device according to claim 1, characterized in that, The first limiting part, the second limiting part, and the hand-held part are integrated into one unit.

9. A limiting method for assembling an engine fuel main pipe clamp, characterized in that, The fuel main pipe clamp assembly is performed using the engine fuel main pipe clamp assembly limiting device as described in any one of claims 1-4.

10. The limiting method for assembling an engine fuel main pipe clamp according to claim 9, characterized in that, The specific steps are as follows: Use the flame tube support pin (7) to fix the flame tube to the combustion chamber casing (4), and install the flame tube support pin fastening screw (8) on the left side of the engine counter-current direction to fix the flame tube support pin (7). Install a clamp (6) on the fuel manifold (10) and temporarily fix the clamp (6) using the engine reverse right clamp fastening screw (9). Place the first limiting part on the fastening screw (8) of the flame tube support pin, and wrap the second limiting part around the sliding direction of the clamp (6) on the fuel pipe (10). Then, tighten the first limiting part and the second limiting part radially along the hand handle to limit the clamp (6). Tighten the clamp fastening screws (9) to complete the clamp (6) installation.

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