Novel lead damping vibration attenuation cabin penetrating piece and manufacturing method

Abstract

According to the novel lead damping vibration attenuation cabin penetrating piece and the manufacturing method, due to the fact that the containing cavity formed between the connecting assembly and the overflowing pipe and the containing cavity formed between the connecting assembly and the pressing piece are filled with the lead layer, the end of the lead layer abuts against the pressing piece, pipeline vibration energy dissipation is achieved through the excellent damping energy dissipation characteristic of lead, the vibration attenuation effect is achieved, and the problem that noise is too large is avoided. And in the long-term use process, the problem that the vibration reduction effect becomes poor due to fatigue or aging is solved. When vibration of a ship is transmitted to the connecting assembly, the connecting assembly generates extrusion force on the pressing piece, so that the pressing piece is bent and deformed, the pressing piece extrudes the lead layer, the lead layer generates plastic flow, vibration is converted into heat energy through plastic deformation of the lead layer, the heat energy is guided through directional deformation of the pressing piece, and the vibration of the ship is reduced. And space vector decomposition dissipation of vibration energy is achieved, and the double advantages of high vibration isolation efficiency and a compact structure are achieved under the complex working conditions of ships and warships.

Description

Technical Field

[0001] This invention relates to the technical field of ship vibration reduction and noise reduction, specifically to a novel lead-damped vibration reduction component and its manufacturing method. Background Technology

[0002] Ships typically have their interiors divided into different functional chambers according to their different needs. Adjacent chambers are effectively sealed using sealing structures to ensure that they can operate independently during use.

[0003] In the process of effectively sealing two adjacent chambers, welded components are often required as the connection structure between the pipelines and the ship. During the operation of the ship, the ship's pipelines will generate mechanical noise due to their operation, and this noise will be transmitted to the outside through the welded components, causing the noise inside the ship to directly affect the daily work of the personnel inside.

[0004] Chinese patent CN117345958A discloses an all-metal high-temperature resistant pipeline elastic transom component and its manufacturing method. By incorporating curved metal elastic elements, it provides elastic support to the pipeline, thereby reducing noise between two adjacent chambers. Chinese patent CN109707914A discloses a transom pipe vibration reduction and noise reduction device, employing an inclined conical shear ring vibration-damping rubber process to further isolate low-frequency vibrations, resulting in better vibration reduction.

[0005] Both of the above methods utilize a flow pipe body, intermediate elastic components or metal bellows, and connecting flanges between the upstream and downstream pipes. While the welded vibration isolation and energy dissipation method using intermediate rubber elastic components or metal bellows can reduce mechanical noise energy to a certain extent, metal bellows have complex manufacturing processes, leading to residual stress accumulation over long-term use. This residual stress accumulation can cause plastic fatigue and reduce the torsional resistance of the metal bellows. Furthermore, the manufacturing cost of metal bellows is high. On the other hand, vibration-damping welded components using rubber elastic components are very complex, and these components are prone to aging during use. Long-term aging can degrade the vibration isolation and energy dissipation effect, thus affecting overall performance. Summary of the Invention

[0006] This invention provides a novel lead-damped vibration-damping through-cabin component and its manufacturing method to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides a novel lead-damped vibration reduction transcab component, comprising: Flow tube; A connecting component is installed on the outer peripheral surface of the flow tube and forms a mounting cavity with the flow tube; A clamping element is disposed within the mounting cavity and forms a receiving cavity between the connecting assembly and the flow pipe; A lead layer is filled into the accommodating cavity, and the end of the lead layer abuts against the clamping member.

[0008] Preferably, the connecting component is provided with a fixing groove, the fixing groove is in communication with the receiving cavity, one end of the clamping member is fixed in the fixing groove and abuts against the connecting component, and the other end abuts against the lead layer.

[0009] Preferably, the clamping element comprises: The first abutting end is fixed in the fixing groove and abuts against the connecting component; The connecting portion has one end fixedly connected to the first abutting end, and the other end extends towards the lead layer. The second abutment has one end fixedly connected to the end of the connecting part away from the first abutment, and the other end abutting against the lead layer. The first abutment and the second abutment are arranged parallel to each other.

[0010] Preferably, a positioning groove is formed between the clamping member, the connecting assembly, and the flow pipe; The novel lead-damped vibration reduction trans-cavity component also includes: A sealing element is disposed in the positioning groove, and the sealing element abuts against the connecting assembly, the clamping element and the flow pipe respectively. The sealing element, the flow pipe and the connecting assembly and the clamping element are all interference fit.

[0011] Preferably, the connection component includes: A sleeve is fitted over the outside of the flow pipe; Mounting caps are provided at both ends of the sleeve, and the mounting caps and the sleeve form the fixing groove. One end of the mounting caps is fixedly connected to the sleeve, and the mounting caps, the sleeve and the flow pipe surround and form the sealed mounting cavity.

[0012] Preferably, a convex ring portion is formed on the outer peripheral surface of the flow tube, the convex ring portion is located in the accommodating cavity and abuts against the lead layer, and the convex ring portion is integrally formed with the flow tube.

[0013] Preferably, the cross-section of the clamping member is "W" shaped; The clamping element includes: The first support part extends into the fixing groove at one end and abuts against the sleeve at the other end; The first deformable part abuts against the mounting cover at one end and against the lead layer at the other end; The second deformable part abuts against the lead layer at one end and against the mounting cover at the other end; The second support part abuts against the mounting cover at one end and against the flow pipe at the other end. The first support part, the first deformation part, the second deformation part, and the second support part are fixedly connected end to end in sequence, and the first deformation part and the second deformation part are located between the first support part and the second support part.

[0014] Preferably, the connection between the first support portion and the first deformable portion has a first abutting surface, and the first abutting surface abuts against the mounting cover; The connection between the second support portion and the second deformable portion has a second abutting surface, which abuts against the mounting cover; The connection between the first deformed portion and the second deformed portion has a third abutting surface, which abuts against the lead layer; The outer circumferential surface of the flow tube is provided with a positioning part, and the end of the second support part away from the second deformation part abuts against the positioning part. The first support part and the first deformation part, the second deformation part and the first deformation part, and the second deformation part and the second support part all form a triangular structure. The novel lead-damped vibration reduction trans-cavity component also includes: A sealing element is disposed between the clamping element and the connecting assembly, and between the clamping element and the flow pipe.

[0015] Preferably, the novel lead-damped vibration-damping transcab member further includes: A connecting flange is installed at the end of the flow pipe; Ear plates are installed on the outer circumferential surface of the sleeve.

[0016] A novel method for manufacturing lead-damped vibration-damping penetration components, applied to the novel lead-damped vibration-damping penetration components as described above, the method comprising: S1. The flow pipe and the convex ring are integrally formed and machined, and the connecting flanges are fixed at both ends of the flow pipe to obtain the first machined part; S2. Place the sleeve, the first machined part, the mounting cap, and the clamping part in liquid flux within a first temperature range to form a flux film on the surface of the sleeve, the first machined part, the mounting cap, and the clamping part. S3. The sleeve, the first processed part, the mounting cover and the clamping part with the flux film layer formed are placed in a preheating furnace in the second temperature range for preheating; S4. Immerse the preheated sleeve, the first processed part, the mounting cover, and the clamping part in a molten pure tin bath, with the bath temperature controlled within the third temperature range, so that the molten tin completely covers the surfaces of the sleeve, the first processed part, the mounting cover, and the clamping part.

[0017] S5. Remove the sleeve, the first processed part, the mounting cover, and the clamping part from the pure tin bath; S6. Fix one end of the first processed part in step S5 to the clamping part and the mounting cover so that an open mounting cavity is formed between the sleeve and the flow pipe, and one end is sealed to form a secondary processed part; S7. Preheat the secondary workpiece at the fourth temperature; S8. Molten pure lead is poured into the preheated secondary processing part mounting cavity for one-time casting. The other end of the secondary processing part is clamped and the mounting cover is installed to obtain the pre-processed part. S9. After the initial processing is completed, the workpiece is kept warm and cooled. After cooling, the mounting covers at both ends are removed, and the seals are assembled with the mounting covers at both ends to obtain a new type of lead-damped vibration reduction through-cabin component.

[0018] The novel lead-damped vibration-damping transverse component and its manufacturing method proposed in this invention have the following beneficial effects: 1. The novel lead-damped vibration-damping transom component and its manufacturing method proposed in this invention utilize a lead layer to dissipate pipeline vibration energy by employing lead's superior damping energy dissipation characteristics. This achieves vibration reduction and avoids excessive noise. Furthermore, the vibration reduction effect will not deteriorate due to fatigue or aging during long-term use.

[0019] The "Z"-shaped clamping component allows the new lead-damped vibration-damping through-cabin component to directly impact one end of the clamping component when subjected to vibration. The impact force is then evenly transmitted to the other end of the clamping component and acts on the lead layer there. Under the force of the clamping component, the lead layer undergoes plastic flow, converting mechanical vibration into internal heat energy. By utilizing the high density and low yield strength of lead, vibration is absorbed, noise generation is avoided, and a quiet effect is achieved.

[0020] The "W"-shaped clamping component allows the new lead-damped vibration-damping through-cabin component to be directly impacted by the connecting assembly when subjected to vibration. Under the impact, the first and second support parts form a rigid support, preventing the clamping component from having too much space, so that both ends of the clamping component can be firmly installed on the connecting assembly and energy transfer can be achieved.

[0021] The vibration of the connecting component is transmitted to the first deformation part and the second deformation part through the first support part and the second support part. Since the first deformation part and the second deformation part are both inclined, and the connection between the first deformation part and the second deformation part abuts against the lead layer, the first deformation part and the second deformation part can deform in two inclined directions, thereby compressing the lead layer in different directions, causing the lead layer to undergo plastic deformation. The lead layer absorbs the energy transmitted by the vibration. The plastically deformed lead layer generates internal energy due to the displacement of its internal structure, which is consumed in the form of heat. After the heat is released, the lead layer returns to its original shape to prepare for the next vibration absorption.

[0022] This novel method for manufacturing lead-damped vibration-damping penetrating chamber components utilizes pre-tin plating and lead enamel to ensure the lead layer fills the mounting cavity more effectively and creates a closed connection between the various components. This completes the connection between the two ends of the lead layer and the clamping component, resulting in a tighter connection between the clamping component and the two ends of the lead layer. During the transmission of vibration energy, the clamping component can directly transmit the vibration energy to the lead layer, causing plastic deformation of the lead layer. When the lead layer is compressed, it generates energy dissipation through deformation.

[0023] Because lead has good plastic deformation ability and high flexibility and ductility, when the lead layer is squeezed, its internal structure will undergo plastic deformation, thereby generating heat energy for release. When the lead layer cools down to room temperature, it can restore its shape and recrystallize, causing its strain hardening to disappear. Therefore, no residual stress or fatigue state will be generated.

[0024] 2. The novel lead-damped vibration-reducing translucent component and manufacturing method proposed in this invention, when the ship's vibration is transmitted to the connecting component, the connecting component generates a compressive force on the clamping component, causing the clamping component to bend and deform, thereby allowing the clamping component to compress the lead layer. The lead layer generates a plastic flow, converting the vibration into heat energy through the plastic deformation of the lead layer. Through the directional deformation guidance of the clamping component, the spatial vector decomposition and dissipation of vibration energy are realized. Under the complex working conditions of the ship, it has the dual advantages of high vibration isolation efficiency and compact structure.

[0025] 3. The novel lead-damped vibration reduction component and manufacturing method proposed in this invention absorb low-frequency energy through the elastic deformation of the clamping component connection and dissipate it through the plastic flow of the lead layer.

[0026] The impact between the lead layer and the interface of the flow tube excites phonon vibrations, and high-frequency energy is dissipated through phonon scattering. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the novel lead-damped vibration reduction through-cabin component in this invention; Figure 2 This is an exploded view of the novel lead-damped vibration reduction component for cabin penetration in this invention; Figure 3 for Figure 1 Cross-sectional view of a novel lead-damped vibration-damping component for cabin penetration; Figure 4 for Figure 3 Enlarged view of section A in the middle; Figure 5 This is a schematic diagram of the clamping element in another embodiment; Figure 6 for Figure 5 Another structural diagram of the middle clamping component; Figure 7 A cross-sectional view of a novel lead-damped vibration-damping through-cabin component in another embodiment; Figure 8 for Figure 7 Enlarged view of section B in the middle; Figure 9 for Figure 7 A sectional view of the middle section of the structure; Figure 10 for Figure 1 A sectional view of the middle section of the structure; Figure 11 This is a flowchart illustrating the manufacturing method of a novel lead-damped vibration-damping through-cabin component.

[0028] In the picture: 100. New type of lead-damped vibration reduction component for cabin penetration; 110. Flow tube; 111. Protruding ring; 112. Positioning part; 120. Connecting assembly; 120a. Mounting cavity; 120b. Fixing groove; 121. Sleeve; 122. Mounting cover; 130. Clamping element; 130a. Receiving cavity; 131. First abutting end; 132. Connecting part; 133. Second abutting end; 130b. Positioning groove; 134. First support part; 135. First deformable part; 136. Second deformable part; 137. Second support part; 134a. First abutting surface; 135a. Second abutting surface; 136a. Third abutting surface; 140. Lead layer; 150. Sealing components; 160. Connecting flange; 170. Earplate.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] It should be noted that in the description of this invention, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] This invention proposes a novel lead-damped vibration-reducing transom component 100, comprising: Flow tube 110; A connecting component 120 is installed on the outer peripheral surface of the flow pipe 110 and forms a mounting cavity 120a between it and the flow pipe 110. A clamping member 130 is disposed in the mounting cavity 120a and forms a receiving cavity 130a between the connecting assembly 120 and the flow pipe 110; A lead layer 140 is filled in the receiving cavity 130a, and the end of the lead layer 140 abuts against the clamping member 130.

[0033] Please refer to Figures 1-10 In this embodiment, the cavity 130a formed between the connecting assembly 120, the flow pipe 110, and the clamping member 130 is filled with a lead layer 140, and the end of the lead layer 140 abuts against the clamping member 130. The superior damping and energy dissipation characteristics of lead are used to dissipate pipeline vibration energy, achieving a vibration reduction effect and avoiding excessive noise. During long-term use, the vibration reduction effect will not deteriorate due to fatigue or aging.

[0034] During the vibration reduction process, the clamping member 130 is subjected to force and bends, causing the lead layer 140 to slip in the crystal lattice, thereby generating viscous frictional heat to adapt to low-frequency vibration.

[0035] During the vibration reduction process, the convex ring 111 of the flow tube 110 slightly impacts the interface of the lead layer 140, thereby exciting the phonon vibration of the lead. The phonon dissipates and consumes high-frequency energy to adapt to the high-frequency vibration.

[0036] By injecting a lead layer 140 into the accommodating cavity 130a, the lead layer 140 is ensured to completely fill the accommodating cavity 130a, resulting in higher interfacial bonding strength and better performance in vibration reduction, thereby reducing noise. Utilizing the high density and low yield strength characteristics of lead, mechanical vibration energy is converted into heat energy through plastic flow, thus avoiding the generation of noise.

[0037] When ship vibration is transmitted to the connecting assembly 120, the connecting assembly 120 exerts a compressive force on the clamping member 130, causing the clamping member 130 to bend and deform. This causes the clamping member 130 to compress the lead layer 140, resulting in a plastic flow in the lead layer 140. The vibration is converted into heat energy through the plastic deformation of the lead layer 140. Guided by the directional deformation of the clamping member 130, the spatial vector decomposition and dissipation of vibration energy are achieved. Under the complex operating conditions of the ship, it has the dual advantages of high vibration isolation efficiency and compact structure.

[0038] It should be noted that the flow tube 110 is generally a hollow circular tube; the clamping member 130 is an annular clamping pad. In one embodiment, the cross-section of the clamping member 130 is approximately "Z" shaped, and in another embodiment, the cross-section of the clamping member 130 is approximately "W" shaped; the lead layer 140 is an annular lead layer 140 formed by filling the accommodating cavity 130a with molten metallic lead; the mounting cavity 120a is generally an annular cavity, the accommodating cavity 130a is generally an annular cavity, and the accommodating cavity 130a is located within the mounting cavity 120a.

[0039] Preferably, the connecting component 120 is provided with a fixing groove 120b, the fixing groove 120b is connected to the receiving cavity 130a, one end of the clamping member 130 is fixed in the fixing groove 120b and abuts against the connecting component 120, and the other end abuts against the lead layer 140.

[0040] Please refer to Figures 1-10 In this embodiment, when the ship's vibration is transmitted to the connecting assembly 120, the clamping member 130 bends and deforms, bending towards the lead layer 140, thereby squeezing the lead layer 140. The squeezing force acts on the lead layer 140, and the lead layer 140 undergoes plastic deformation along the main energy dissipation direction, converting the squeezing force into heat energy. Through the directional deformation guidance of the clamping member 130, the spatial vector decomposition and dissipation of vibration energy are realized, which has the dual advantages of high vibration isolation efficiency and compact structure under the complex working conditions of the ship.

[0041] Preferably, the clamping member 130 includes: The first abutting end 131 is fixed in the fixing groove 120b and abuts against the connecting component 120; The connecting portion 132 has one end fixedly connected to the first abutting end 131, and the other end extends in a direction close to the lead layer 140. The second abutment end 133 has one end fixedly connected to the end of the connecting part 132 away from the first abutment end 131, and the other end abuts against the lead layer 140. The first abutment end 131 and the second abutment end 133 are arranged parallel to each other.

[0042] Please refer to Figures 1-10In this embodiment, the first abutting end 131 is fixed in the fixing groove 120b, thereby allowing one end of the clamping member 130 to be firmly installed in the fixing groove 120b and preventing the clamping member 130 from being displaced.

[0043] When the ship vibrates, the vibration is transmitted to the connecting assembly 120. The connecting assembly 120 then applies the energy generated by the vibration to the first abutment end 131, which is then transmitted to the connecting part 132. The connecting part 132 undergoes a combination of shear bending deformation or shear deformation. The connecting part 132 applies some of the energy to the second abutment end 133, which generates a vertical linear pressure. Under the pressure of the second abutment end 133, the lead layer 140 undergoes plastic flow, and the grains of the lead layer 140 slide along the crystal direction. The mechanical vibration energy is converted into heat energy through the plastic deformation of the lead (wherein, the lead layer undergoes plastic deformation under the pressure of the second abutment end 133, causing structural deformation, and some energy is converted into local heat as the structure deforms). This achieves energy dissipation. When there is no vibration, the connecting part 132 is stretched and undergoes reverse bending rebound. The second abutment end 133 lifts up to form a negative pressure adsorption effect, thereby allowing the lead layer 140 to recover.

[0044] The elastic deformation of the connecting part 132 of the clamping member 130 absorbs low-frequency energy and dissipates it through the plastic flow of the lead layer 140.

[0045] The impact at the interface between the lead layer 140 and the flow tube 110 excites phonon vibrations, which dissipate high-frequency energy through phonon scattering.

[0046] By combining the plastic energy dissipation of the lead layer 140 with the clamping component 130, the problems of fatigue and aging that exist in traditional through-cabin components during long-term use are solved.

[0047] It should be noted that the connecting assembly 120 includes a sleeve 121 and mounting caps 122 disposed at both ends of the sleeve 121. The mounting caps 122 are fixedly installed at the ends of the sleeve 121 by bolts and nuts. The sleeve 121 has through holes, and the bolts pass through the ends of the mounting caps 122 and the sleeve 121 and are fixed with nuts, thereby installing the mounting caps 122 to the ends of the sleeve 121. The fixing groove 120b is approximately an annular groove and is located at the connection between the sleeve 121 and the mounting cap 122. The fixing groove 120b is located within the mounting cavity 120a and is used to fix the first abutment end 131 of the clamping member 130.

[0048] The first abutment end 131 is generally an annular plate arranged in a direction perpendicular to the axis of the flow pipe 110, the connecting part 132 is generally an annular plate arranged in a direction parallel to the axis of the flow pipe 110, and the second abutment end 133 is generally an annular plate arranged in a direction perpendicular to the axis of the flow pipe 110. The first abutment end 131 and the second abutment end 133 are located on opposite sides of the connecting part 132.

[0049] Preferably, a positioning groove 130b is formed between the clamping member 130, the connecting assembly 120, and the flow pipe 110; The novel lead-damped vibration-damping trans-cabin component 100 also includes: A sealing element 150 is disposed in the positioning groove 130b. The sealing element 150 abuts against the connecting assembly 120, the clamping element 130 and the flow pipe 110 respectively. The sealing element 150, the flow pipe 110 and the connecting assembly 120 and the clamping element 130 are all interference fit.

[0050] Please refer to Figures 1-10 In this embodiment, the connection between the flow pipe 110 and the clamping member 130 is sealed by the sealing member 150, and the connection between the flow pipe 110 and the mounting cover 122 is sealed by the sealing member 150, thereby ensuring the vibration reduction and energy dissipation effect and avoiding the problem of poor vibration reduction and energy dissipation effect due to the gap between the sealing member 150 and these structures.

[0051] It should be noted that the positioning groove 130b is roughly an annular space. By pressing these structures with an interference fit, a tight connection is formed between the connecting component 120, the flow pipe 110, and the clamping member 130, thereby sealing the lead layer 140 in the accommodating cavity 130a. At the same time, under the elastic deformation of the sealing member 150, the flow pipe 110 can be relatively misaligned, so that the vibration reduction effect of the new lead damping vibration reduction penetrating component 100 is better, thereby reducing vibration and noise of the ship's noise source pipelines passing through the bulkhead.

[0052] In this embodiment, the positioning groove 130b is the installation space for the seal 150. The seal 150 is radially limited by the side wall of the groove to prevent it from shifting under vibration or thermal expansion and contraction conditions.

[0053] The seal 150 is pressed between the connecting assembly 120, the clamping member 130, and the flow tube 110, using its elastic deformation to fill the gaps between all contact surfaces. Due to the interference fit between the components, a pre-compression force is generated during assembly. In the axial direction of the flow tube 110, the seal 150 expands under pressure, blocking the leakage path of the lead layer 140. In the radial direction of the flow tube 110, the seal 150 is radially compressed with the sleeve 121 and the flow tube 110, preventing vibration energy from being transmitted through the gaps. Under interface sealing, the contact surfaces of the clamping member 130 and the seal 150 form a mechanical interlock, suppressing the wear of the lead layer 140 and the metal interface.

[0054] Welded seals rely on the integrity of the weld, but stress concentration is prone to occur at the weld, leading to fatigue cracks. In this embodiment, the non-welded mechanical interference fit of the seal 150 eliminates residual welding stress, while allowing the seal 150 to undergo controllable elastic deformation during vibration, dissipating energy.

[0055] Under vibration conditions, the elastic deformation of the seal 150 can compensate for the relative displacement between components and prevent the sealing interface from separating due to vibration.

[0056] The positioning groove 130b isolates the seal 150 from the external environment, and combined with the chemical corrosion resistance of the seal 150 (made of a flexible and corrosion-resistant material, such as fluororubber), it avoids the problem of rubber exposure and aging.

[0057] Preferably, the connection component 120 includes: Sleeve 121 is fitted onto the outside of the flow pipe 110; Mounting cap 122 is provided at both ends of sleeve 121. The mounting cap 122 and sleeve 121 form the fixing groove 120b. One end of mounting cap 122 is fixedly connected to sleeve 121. Mounting cap 122, sleeve 121 and flow pipe 110 surround and form a sealed mounting cavity 120a.

[0058] Please refer to Figures 1-10 In this embodiment, the sealed mounting cavity 120a, which is formed by the mounting cover 122, the sleeve 121 and the overflow pipe 110, serves as the filling container for the lead layer 140.

[0059] Secondly, under vibration conditions, when vibration energy is transmitted to the lead layer 140 through the flow pipe 110, the rigid sidewall (sleeve 121) of the mounting cavity 120a reflects part of the energy back to the lead layer 140, thereby enhancing the energy dissipation efficiency.

[0060] The vibration of the flow tube 110 is transmitted to the lead layer 140, where the mid-to-high frequency energy is absorbed by the plastic deformation of the lead. The remaining vibration energy is transmitted to the mounting cover 122 via the sleeve 121, where the low-frequency energy is further dissipated by the clamping member 130 through elastic deformation.

[0061] The sleeve 121 and the mounting cover 122 are assembled separately, which allows for step-by-step assembly in the confined space of the ship, reducing the difficulty of installation.

[0062] It should be noted that the sleeve 121 is roughly cylindrical. As an outer load-bearing structure, the sleeve 121 is fitted over the flow pipe 110, forming an installation cavity 120a between the sleeve 121 and the flow pipe 110, providing space for the lead layer 140 and the clamping member 130. The rigid material of the sleeve 121 (such as low-carbon steel or titanium alloy) can withstand the external loads of the ship's piping system (such as impact and water pressure), while limiting the radial vibration displacement of the flow pipe 110.

[0063] The mounting cover 122 is approximately an annular plate, and is positioned perpendicular to the axis of the flow pipe 110. The mounting cover 122 is fixed to both ends of the sleeve 121, forming a fixing groove 120b between it and the sleeve 121 to fix the installation position of the clamping member 130. The connection method between the mounting cover 122 and the sleeve 121 (such as flange bolt connection or laser welding; in this embodiment, the mounting cover 122 is fixed to the end of the sleeve 121 by bolts and nuts) forms a closed mounting cavity 120a, ensuring that the lead layer 140 is in a completely sealed environment.

[0064] It should be noted that there are two mounting covers 122, which are located at the two ends of the sleeve 121.

[0065] Preferably, a protruding ring portion 111 is formed on the outer peripheral surface of the flow tube 110. The protruding ring portion 111 is located in the accommodating cavity 130a and abuts against the lead layer 140. The protruding ring portion 111 is integrally formed with the flow tube 110.

[0066] Please refer to Figures 1-10 In this embodiment, the convex ring 111 serves as a raised structure on the outer surface of the flow pipe 110 and is embedded inside the lead layer 140 to form a three-dimensional interlocking interface. When the pipeline vibrates, the vibration energy of the flow pipe 110 is transmitted to the lead layer 140 through the convex ring 111. The geometry of the convex ring (such as a trapezoidal cross section, a semi-circular cross section, etc.) forces the lead layer 140 to generate multi-directional plastic flow (axial compression + radial shear), which significantly improves the energy dissipation efficiency.

[0067] The protruding ring 111 is integrally formed with the flow tube 110, eliminating stress concentration points caused by welding or bolting. Vibration loads are smoothly transferred to the body of the flow tube 110 through the protruding ring 111, avoiding local stresses from exceeding the material yield strength.

[0068] The protruding ring 111 and the flow tube 110 are made of the same material and have the same coefficient of thermal expansion, which avoids peeling stress between the lead layer 140 and the metal interface due to temperature changes.

[0069] The engagement between the convex ring 111 and the lead layer 140 creates a torsional self-locking effect, which increases the torsional stiffness by 70% under a 15° torsional load.

[0070] Since the protruding ring 111 and the flow tube 110 are integrally formed, welding is avoided, thereby enhancing the torsional capacity.

[0071] The convex ring portion 111 is roughly circular.

[0072] Preferably, the cross-section of the clamping member 130 is "W" shaped; The clamping element 130 includes: The first support part 134 extends into the fixing groove 120b at one end and abuts against the sleeve 121, and abuts against the mounting cover 122 at the other end; The first deformable part 135 abuts against the mounting cover 122 at one end and against the lead layer 140 at the other end; The second deformable part 136 abuts against the lead layer 140 at one end and against the mounting cover 122 at the other end; The second support portion 137 has one end abutting against the mounting cover 122 and the other end abutting against the flow pipe 110. The first support portion 134, the first deformation portion 135, the second deformation portion 136, and the second support portion 137 are sequentially and fixedly connected end to end, and the first deformation portion 135 and the second deformation portion 136 are located between the first support portion 134 and the second support portion 137.

[0073] Please refer to Figures 1-10 In this embodiment, the W-shaped cross-section of the clamping member 130 forms a bidirectional stiffness gradient. In the axial direction of the flow pipe 110, the straight sections of the first support portion 134 and the second support portion 137 provide high rigidity support to suppress the axial displacement of the flow pipe 110. In the radial direction of the flow pipe 110, the bent sections of the first deformation portion 135 and the second deformation portion 136 allow radial elastic deformation to absorb vibration energy. The bent sections are located at the connection between the first deformation portion and the second deformation portion.

[0074] When the vibration energy is transmitted to the clamping member 130, the high-frequency vibration is converted into elastic strain energy by the bending deformation of the first deformation part 135, and the remaining energy is further attenuated by the shear deformation of the second deformation part 136; the low-frequency vibration is transmitted to the flow pipe 110 through the second support part 137 and absorbed by the plastic deformation of the lead layer 140.

[0075] The triangular geometric configuration formed between the first support portion 134 and the first deformation portion 135, and between the second deformation portion 136 and the second support portion 137, enhances torsional resistance while avoiding local stress concentration.

[0076] The first deformation section 135 dissipates energy through bending deformation to counteract high-frequency vibrations; the second deformation section 136 works in conjunction with the lead layer 140 to suppress low-frequency vibrations.

[0077] Axial compression: The folding characteristics of the W-shaped structure allow for axial compression of up to 10 mm (within the elastic limit); Radial shear: The arc design of the deformation section can withstand ±5 mm shear displacement without plastic deformation; Torsion: The triangular support structure provides a torsional stiffness of 500 Nm / rad, which is superior to that of traditional corrugated pipes (approximately 300 Nm / rad).

[0078] It should be noted that the W-shaped clamping part 130 can be integrally stamped and is highly compatible with the lead layer 140 pouring process. The open structure (W-shaped cross section) of the clamping part 130 and the molten lead layer 140 fully fill the cavity, and the interface bonding strength is ≥20MPa.

[0079] The first support portion 134, the second support portion 137, the first deformation portion 135, and the second deformation portion 136 are all inclined to the axial direction of the sleeve 121. The first support portion 134 and the second deformation portion 136 are inclined in the same direction, but the inclination angle of the first support portion 134 is greater than that of the second deformation portion 136. The first deformation portion 135 and the second support portion 137 are inclined in the same direction, but the inclination angle of the second support portion 137 is greater than that of the first deformation portion 135.

[0080] The first support part 134, the second support part 137, the first deformation part 135 and the second deformation part 136 are all arranged with an inclination angle θ (θ=30°~60°) relative to the axis of the sleeve 121, forming a W-shaped geometric configuration.

[0081] The elastic deformation path of the clamping member 130 simultaneously covers both the axial and radial directions, achieving multi-directional stiffness adjustment. Axially, the inclined sections of the first support portion 134 and the second support portion 137 project into the axial direction, providing high-stiffness support and suppressing axial displacement of the pipeline. Radially, the inclined sections of the first deformation portion 135 and the second deformation portion 136 allow for radial elastic deformation, absorbing lateral vibration energy.

[0082] Vibration energy is decomposed into axial pressure and radial shear force through the inclined sections of the first support 134 and the second support 137. The axial pressure is directly transmitted to the sleeve 121 by the support, and the radial shear force is converted into elastic strain energy by the bending deformation of the deformation section. The lateral load is decomposed into axial tension / compression and radial bending through the inclined section of the deformation section, and the energy is dissipated by the plastic deformation of the lead layer 140.

[0083] The first support part 134, the first deformation part 135, the second deformation part 136 and the second support part 137 are connected by an inclined structure to form a spatial triangular structure, which improves the axial load-bearing capacity. The inclined support forms a closed shear ring, which improves the torsional resistance. The adjacent ends are connected by a rounded transition, thereby reducing stress concentration.

[0084] The first deformable part 135 cuts into the lead layer 140 at an acute angle, forcing the lead layer 140 to undergo multi-directional plastic flow. In the axial direction, the lead layer 140 is compressed along the inclined direction, and in the radial direction, the Poisson effect of lead causes radial expansion, forming a mechanical interlock with the sleeve 121 and improving the interface bonding strength.

[0085] The second deformation section 136 cuts into the lead layer 140 at an acute angle at the contact surface with the lead layer 140, forcing the lead layer 140 to undergo multi-directional plastic flow, thereby increasing the bonding strength and plastic deformation of the lead layer 140.

[0086] Preferably, the connection between the first support portion 134 and the first deformable portion 135 has a first abutting surface 134a, and the first abutting surface 134a abuts against the mounting cover 122. The connection between the second support portion 137 and the second deformation portion 136 has a second abutting surface 135a, which abuts against the mounting cover 122. The connection between the first deformable part 135 and the second deformable part 136 has a third abutting surface 136a, which abuts against the lead layer 140. The outer peripheral surface of the flow pipe 110 is provided with a positioning part 112. The end of the second support part 137 away from the second deformation part 136 abuts against the positioning part 112. The first support part 134 and the first deformation part 135, the second deformation part 136 and the first deformation part 135, and the second deformation part 136 and the second support part 137 all form a triangular structure. The novel lead-damped vibration-damping trans-cabin component 100 also includes: A sealing element 150 is disposed between the clamping element 130 and the connecting assembly 120, and between the clamping element 130 and the flow pipe 110.

[0087] Please refer to Figures 1-10 In this embodiment, when the ship is in operation, mechanical vibrations are transmitted to the sleeve 121 or the mounting cover 122 through the structure of the adjacent chamber (such as bulkheads or supports).

[0088] Vibration is transmitted directly through sleeve 121 to the first contact surface 134a and the second contact surface 135a of the first support part 134 and the second support part 137.

[0089] Because the first support portion 134 and the second support portion 137 are inclined, the vibration energy is decomposed into axial and radial components. The high-frequency vibration energy in the axial component is rapidly dissipated through the rigid contact surface to the thick-walled region of the sleeve 121. The low-frequency vibration energy in the radial component is transmitted to the first deformation portion 135 and the second deformation portion 136 through the elastic deformation of the first support portion 134 and the second support portion 137, entering the next stage of energy dissipation.

[0090] The first deformation section 135 and the second deformation section 136 dissipate high-frequency vibrations through bending deformation. The first deformation section 135 and the second deformation section 136 transfer the remaining vibration energy to the third contact surface 136a, forcing the lead layer 140 to undergo multi-directional plastic flow (axial compression + radial shear), dissipating low-frequency energy.

[0091] Lead layer 140 has low yield strength, and during plastic deformation, lattice slip absorbs energy, suppressing low-frequency resonance.

[0092] The positioning part 112 on the outer periphery of the flow pipe 110 abuts against the second support part 137 to form an axial constraint, preventing the interface of the clamping member 130 from separating due to vibration displacement.

[0093] The inclined deformation section design of the W-type clamping member 130 disperses stress to multiple areas, thereby improving torsional stiffness.

[0094] Vibration is transmitted through the contact between the first support part 134 and the second support part 137 and the mounting cover 122, thereby eliminating residual welding stress.

[0095] The interlocking interface between the third contact surface 136a and the lead layer 140 increases the peel strength.

[0096] Vibrational energy is transmitted through the connecting assembly 120 (sleeve 121 / mounting cover 122) to the first support 134 and the second support 137 of the clamping member 130, then to the first deformation part 135 and the second deformation part 136, and finally to the lead layer 140, so as to achieve efficient dissipation through a graded path.

[0097] The first support portion 134 and the first deformation portion 135, the second deformation portion 136 and the first deformation portion 135, and the second deformation portion 136 and the second support portion 137 all form a triangular structure, thereby improving the torsional resistance.

[0098] The seal 150 prevents leakage of the lead layer 140, and at the same time, the elastic deformation of the seal 150 compensates for the micro-displacement caused by vibration.

[0099] Preferably, the novel lead-damped vibration-damping transom component 100 further includes: A connecting flange 160 is installed at the end of the flow pipe 110; Ear plate 170 is installed on the outer peripheral surface of sleeve 121.

[0100] Please refer to Figures 1-10 In this embodiment, the docking flange 160 is fixed to the end of the flow pipe 110, and the flange bolt connection is used to achieve quick docking with the ship's pipeline.

[0101] The lug plate 170 is welded or bolted to the outer circumferential surface of the sleeve 121 and is connected to the ship's pipeline through-cabin bulkhead via the lug plate 170.

[0102] A novel method for manufacturing a lead-damped vibration-damping through-hull component 100, applied to the lead-damped vibration-damping through-hull component as described above, the method comprising: S1. The flow pipe and the convex ring are integrally formed and machined, and the connecting flanges are fixed at both ends of the flow pipe to obtain the first machined part; S2. Place the sleeve, the first machined part, the mounting cap, and the clamping part in liquid flux within a first temperature range to form a flux film on the surface of the sleeve, the first machined part, the mounting cap, and the clamping part. S3. The sleeve, the first processed part, the mounting cover and the clamping part with the flux film layer formed are placed in a preheating furnace in the second temperature range for preheating; S4. Immerse the preheated sleeve, the first processed part, the mounting cover, and the clamping part in a molten pure tin bath, with the bath temperature controlled within the third temperature range, so that the molten tin completely covers the surfaces of the sleeve, the first processed part, the mounting cover, and the clamping part.

[0103] S5. Remove the sleeve, the first processed part, the mounting cover, and the clamping part from the pure tin bath; S6. Fix one end of the first processed part in step S5 to the clamping part and the mounting cover so that an open mounting cavity is formed between the sleeve and the flow pipe, and one end is sealed to form a secondary processed part; S7. Preheat the secondary workpiece at the fourth temperature; S8. Molten pure lead is poured into the preheated secondary processing part mounting cavity for one-time casting. The other end of the secondary processing part is clamped and the mounting cover is installed to obtain the pre-processed part. S9. After the initial processing is completed, the workpiece is kept warm and cooled. After cooling, the mounting covers at both ends are removed, and the seals are assembled with the mounting covers at both ends to obtain a new type of lead-damped vibration reduction through-cabin component.

[0104] Please refer to Figures 1-11In this embodiment, hot spinning or forging is used to process the flow pipe 110 and the convex ring 111 in one step, avoiding stress concentration caused by welding or forging. A docking flange 160 is installed at both ends of the flow pipe 110 to obtain the first processed part, which can be connected to the pipeline through the docking flange 160.

[0105] The sleeve, the first processed part, the mounting cover, and the clamping part are then immersed in liquid flux (usually zinc chloride-based, possibly containing activators such as ammonium chloride) within a first temperature range (60-80°C), or brushed or sprayed to ensure that all surfaces requiring soldering are uniformly covered with a thin and complete flux film.

[0106] The sleeve, first processed part, mounting cap and clamping part with flux film formed are taken out from the liquid flux and placed in the preheating furnace for preheating in the second temperature range (temperature range of 250-280°C) to ensure that the above components are preheated to the soldering temperature.

[0107] The preheated sleeve, the first processed part, the mounting cover, and the clamping part are vertically immersed in a molten pure tin bath (Sn>99.9%), and the bath temperature is controlled within the third temperature range (270-300°C) so that the molten tin completely covers the surfaces of the sleeve, the first processed part, the mounting cover, and the clamping part.

[0108] The immersion time is from tens of seconds to several minutes to ensure that the flux works fully and that the molten solder completely wets and covers the surface of all components.

[0109] Slowly remove the sleeve, first processed part, mounting cover and clamping part from the pure tin bath, and drain the excess molten tin.

[0110] After tinning, a clamping component and a mounting cap are installed on one end of the first processed part to form an open mounting cavity between the sleeve and the flow tube, and one end is sealed to form a secondary processed part.

[0111] Preheating the secondary processed parts at a fourth temperature (380-420°C) prevents the molten lead from solidifying too quickly when it comes into contact with the cold workpiece, which could lead to incomplete filling, cold shuts, and porosity. This keeps the tin layer in a molten / semi-molten state, which is beneficial for lead-tin alloy bonding.

[0112] The preheated secondary processing part is held vertically with the opening of the mounting cavity facing upwards. Molten pure lead (pure lead at 420-450℃) is poured into the preheated mounting cavity of the secondary processing part for a single casting process. During pouring, slight high-frequency vibration helps to break up air bubbles and promote their upward escape. Pouring continues until the molten lead overflows, ensuring that the interlayer is completely filled and all gas is expelled.

[0113] Then, clamping parts and mounting caps are installed and fixed on the other end of the secondary processed parts after casting, so that the two ends of the lead layer are shaped to fit the clamping parts.

[0114] Keep the pre-processed parts at around 420-450℃ for 1-5 minutes to cool them down. After cooling, remove the mounting covers at both ends and assemble the seals and mounting covers at both ends to obtain a new type of lead-damped vibration-damping through-cabin component.

[0115] The two end faces are fixed with bolts and nuts to the mounting cover 122, so that the two mounting covers 122 are fixed to the two ends of the sleeve 121, thus obtaining the novel lead damping vibration reduction through-cabin component 100.

[0116] Because the cavity 130a formed between the connecting assembly 120, the flow pipe 110, and the clamping member 130 is filled with a lead layer 140, and the end of the lead layer 140 abuts against the clamping member 130, the superior damping energy dissipation characteristics of lead are used to dissipate pipeline vibration energy, achieving a vibration reduction effect and avoiding excessive noise. During long-term use, the vibration reduction effect will not deteriorate due to fatigue or aging.

[0117] During the vibration reduction process, the clamping member 130 is subjected to force and bends, causing the lead layer 140 to slip in the crystal lattice, thereby generating viscous frictional heat to adapt to low-frequency vibration.

[0118] It should be further noted that mechanical cleaning of each component is required before manufacturing the new lead-damped vibration damping transom components. Thorough cleaning of all rust, oil, scale, old coatings, etc., is performed using sandblasting (quartz sand or brown corundum) on the outer wall of the flow pipe, the inner wall of the sleeve, and the inner side of the mounting cavity of the mounting cover. The goal is to obtain a uniform, rough, and clean metal surface (Sa 2.5 or higher).

[0119] Then, thoroughly clean all boundaries of the mounting cavity using a strong alkaline degreaser or organic solvent (such as acetone or a specialized metal cleaner) to remove all grease, fingerprints, and cutting fluid residue. Immersion, spraying, or ultrasonic cleaning can be used.

[0120] After cleaning, rinse thoroughly with plenty of clean water (preferably deionized water), blow dry with compressed air, and then dry completely in an oven (100-120°C). Any moisture residue will cause air bubbles.

[0121] In step S9, the process of heat preservation and cooling of the pre-processed workpiece requires extremely slow cooling, especially at the freezing point of lead (327°C), to avoid the phenomenon of accelerated shrinkage caused by rapid cooling, which could lead to internal voids or incomplete filling, or stress concentration.

[0122] This novel method for manufacturing lead-damped vibration-damping penetrating chamber components utilizes pre-tin plating and lead enamel to ensure the lead layer fills the mounting cavity more effectively and creates a closed connection between the various components. This completes the connection between the two ends of the lead layer and the clamping component, resulting in a tighter connection between the clamping component and the two ends of the lead layer. During the transmission of vibration energy, the clamping component can directly transmit the vibration energy to the lead layer, causing plastic deformation of the lead layer. When the lead layer is compressed, it generates energy dissipation through deformation.

[0123] Because lead has good plastic deformation ability and high flexibility and ductility, when the lead layer is squeezed, its internal structure will undergo plastic deformation, thereby generating heat energy for release. When the lead layer cools down to room temperature, it can restore its shape and recrystallize, causing its strain hardening to disappear. Therefore, no residual stress or fatigue state will be generated.

[0124] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A novel lead-damped vibration-damping trans-cabin component, characterized in that, include: Flow tube; A connecting component is installed on the outer peripheral surface of the flow tube and forms a mounting cavity between the component and the flow tube. A clamping element is disposed within the mounting cavity and forms a receiving cavity between the connecting assembly and the flow pipe; A lead layer is filled into the accommodating cavity, and the end of the lead layer abuts against the clamping member.

2. The novel lead-damped vibration-damping trans-cabin component as described in claim 1, characterized in that, The connecting component is provided with a fixing groove, which communicates with the receiving cavity. One end of the clamping member is fixed in the fixing groove and abuts against the connecting component, while the other end abuts against the lead layer.

3. The novel lead-damped vibration-damping trans-cabin component as described in claim 2, characterized in that, The clamping element includes: The first abutting end is fixed in the fixing groove and abuts against the connecting component; The connecting portion has one end fixedly connected to the first abutting end, and the other end extends towards the lead layer. The second abutment has one end fixedly connected to the end of the connecting part away from the first abutment, and the other end abutting against the lead layer. The first abutment and the second abutment are arranged parallel to each other.

4. The novel lead-damped vibration-damping trans-cabin component as described in claim 3, characterized in that, A positioning groove is formed between the clamping member, the connecting assembly, and the flow pipe; The novel lead-damped vibration reduction trans-cavity component also includes: A sealing element is disposed in the positioning groove, and the sealing element abuts against the connecting assembly, the clamping element and the flow pipe respectively. The sealing element, the flow pipe and the connecting assembly and the clamping element are all interference fit.

5. The novel lead-damped vibration-damping trans-cabin component as described in claim 2, characterized in that, The connection component includes: A sleeve is fitted over the outside of the flow pipe; Mounting caps are provided at both ends of the sleeve, and the mounting caps and the sleeve form the fixing groove. One end of the mounting caps is fixedly connected to the sleeve, and the mounting caps, the sleeve, and the flow pipe surround and form the closed mounting cavity.

6. The novel lead-damped vibration-damping trans-cabin component as described in claim 1, characterized in that, A protruding ring portion is formed on the outer peripheral surface of the flow tube. The protruding ring portion is located inside the accommodating cavity and abuts against the lead layer. The protruding ring portion is integrally formed with the flow tube.

7. The novel lead-damped vibration-damping trans-cabin component as described in claim 5, characterized in that, The cross-section of the clamping element is "W" shaped; The clamping element includes: The first support part extends into the fixing groove at one end and abuts against the sleeve at the other end; The first deformable part abuts against the mounting cover at one end and against the lead layer at the other end; The second deformable part abuts against the lead layer at one end and against the mounting cover at the other end; The second support part abuts against the mounting cover at one end and against the flow pipe at the other end. The first support part, the first deformation part, the second deformation part, and the second support part are fixedly connected end to end in sequence, and the first deformation part and the second deformation part are located between the first support part and the second support part.

8. The novel lead-damped vibration-damping trans-cabin component as described in claim 7, characterized in that, The connection between the first support portion and the first deformable portion has a first abutting surface, which abuts against the mounting cover; The connection between the second support portion and the second deformable portion has a second abutting surface, which abuts against the mounting cover; The connection between the first deformed portion and the second deformed portion has a third abutting surface, which abuts against the lead layer; The outer peripheral surface of the flow tube is provided with a positioning part, and the end of the second support part away from the second deformation part abuts against the positioning part. The first support part and the first deformation part, the second deformation part and the first deformation part, and the second deformation part and the second support part all form a triangular structure. The novel lead-damped vibration reduction trans-cavity component also includes: A sealing element is disposed between the clamping element and the connecting assembly, and between the clamping element and the flow pipe.

9. The novel lead-damped vibration-damping trans-cabin component as described in claim 5, characterized in that, The novel lead-damped vibration reduction trans-cavity component also includes: A connecting flange is installed at the end of the flow pipe; Ear plates are installed on the outer circumferential surface of the sleeve.

10. A novel lead-damped vibration-damping through-tank component manufacturing method, applied to the novel lead-damped vibration-damping through-tank component as described in any one of claims 1-9, characterized in that, The method includes: S1. The flow pipe and the convex ring are integrally formed and machined, and the connecting flanges are fixed at both ends of the flow pipe to obtain the first machined part; S2. Place the sleeve, the first machined part, the mounting cap, and the clamping part in liquid flux within a first temperature range to form a flux film on the surface of the sleeve, the first machined part, the mounting cap, and the clamping part. S3. The sleeve, the first processed part, the mounting cover and the clamping part with the flux film layer formed are placed in a preheating furnace in the second temperature range for preheating; S4. Immerse the preheated sleeve, the first processed part, the mounting cover, and the clamping part in a molten pure tin bath, with the bath temperature controlled within the third temperature range, so that the molten tin completely covers the surfaces of the sleeve, the first processed part, the mounting cover, and the clamping part. S5. Remove the sleeve, the first processed part, the mounting cover, and the clamping part from the pure tin bath; S6. Fix one end of the first processed part in step S5 to the clamping part and the mounting cover so that an open mounting cavity is formed between the sleeve and the flow pipe, and one end is sealed to form a secondary processed part; S7. Preheat the secondary workpiece at the fourth temperature; S8. Molten pure lead is poured into the preheated secondary processing part mounting cavity for one-time casting. The other end of the secondary processing part is clamped and the mounting cover is installed to obtain the pre-processed part. S9. After the initial processing is completed, the workpiece is kept warm and cooled. After cooling, the mounting covers at both ends are removed, and the seals are assembled with the mounting covers at both ends to obtain a new type of lead-damped vibration reduction through-cabin component.

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