Pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency

Abstract

The present invention relates to the technical field of vibration reduction equipment, and provides a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency, comprising: a frame, a clamp, a first elastic member and a pair of stiffness adjustment mechanisms; the clamp is used to fix the pipeline, and the opposite ends of the clamp are respectively slidably connected to the side walls of the frame, the clamp is provided with a protrusion, and the protrusion is connected to the bottom surface of the frame through the first elastic member, and a pair of stiffness adjustment mechanisms are respectively arranged on both sides of the protrusion; the stiffness adjustment mechanism comprises a box body and a second elastic member, the box body is slidably connected to the side walls of the frame, the second elastic member is arranged in the box body, one end of the second elastic member passes through the box body and is connected to the protrusion, and the second elastic member is in a compressed state. The above-mentioned pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency, by utilizing a combination of positive stiffness and negative stiffness, can ensure that the pipeline support vibration isolation device has a larger static stiffness value and a smaller dynamic stiffness value, thereby isolating low-frequency vibrations while providing effective support.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction equipment, and in particular to a pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency. Background Art

[0002] Piping systems are a critical component of ships. Their core function is to transmit energy, momentum, or mass flows, crucial for their normal operation. However, piping systems are also a crucial pathway for vibration transmission, allowing vibrations generated by mechanical equipment to propagate through the piping system to the ship's structure. With the continuous development of the shipping industry, the complexity of ships and the power of their propulsion systems have continued to increase, leading to an increasing emphasis on vibration, a major factor hindering improved ship performance.

[0003] Severe vibration in piping systems can lead to a range of serious consequences. Vibration can cause fatigue damage to the piping, leading to leakage of the working fluid within. Leakage not only causes economic losses but can also cause safety incidents such as fires and explosions, posing a serious threat to the lifespan and safety of the vessel. Furthermore, piping system vibration can negatively impact the work, life, and health of crew members, such as causing seasickness, fatigue, and even long-term health problems, reducing their work efficiency and quality of life.

[0004] In order to deal with the vibration problem of the pipeline system, pipeline support devices are widely used. The main function of the pipeline support device is to support and fix the pipeline, limit the displacement and deformation of the pipeline, and bear the static and dynamic loads transmitted from the pipeline. In addition, the pipeline support device also undertakes the important task of vibration isolation. As an important component of the pipeline support device, the vibration isolation effect of the vibration isolator is closely related to the natural frequency. Generally speaking, the lower the natural frequency of the vibration isolator, the better the vibration isolation effect. However, traditional vibration isolators only have a certain vibration reduction effect on high-frequency vibrations, and their isolation ability for low-frequency vibrations is poor. This is because the frequency of low-frequency vibrations is relatively close to the natural frequency of the ship structure, which easily causes resonance and further aggravates the vibration problem.

[0005] Further analysis revealed that the stiffness of the vibration isolator has a direct impact on its natural frequency and vibration isolation performance. The lower the stiffness of the vibration isolator, the lower its natural frequency, and theoretically, the better the vibration isolation effect. However, low-stiffness vibration isolators have significant limitations in practical applications. Low stiffness causes the isolator to deform significantly under static loads, resulting in a decrease in static stiffness performance. This performance degradation not only affects the stability of the piping system but can also lead to isolator failure over long-term use.

[0006] Therefore, existing pipeline support devices have an irreconcilable contradiction between vibration isolation and support performance. In order to achieve both vibration isolation and support, it is urgent to invent a new pipeline support vibration isolation device to effectively solve the problems existing in the existing technology and improve the reliability and safety of ship piping systems. Summary of the Invention

[0007] The present invention provides a pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency, so as to solve the defect that pipeline support devices in the prior art cannot have both vibration isolation and support performances.

[0008] The present invention provides a pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency, comprising: a frame, a clamp, a first elastic member and a pair of stiffness adjustment mechanisms; the clamp is used to fix the pipeline, and the opposite ends of the clamp are respectively slidably connected to the side walls of the frame, the clamp is provided with a protrusion, and the protrusion is connected to the bottom surface of the frame through the first elastic member, and a pair of stiffness adjustment mechanisms are respectively arranged on both sides of the protrusion; each of the stiffness adjustment mechanisms comprises: a box body and a second elastic member, the box body is slidably connected to the side wall of the frame, the second elastic member is arranged in the box body, one end of the second elastic member passes through the box body and is connected to the protrusion, wherein the second elastic member is in a compressed state.

[0009] According to a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency provided by the present invention, each of the stiffness adjustment mechanisms also includes a first telescopic structure, which is arranged in the box body and connected to the second elastic member, and the first telescopic structure is used to adjust the pre-compression amount of the second elastic member.

[0010] According to the present invention, a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency also includes a pair of second telescopic structures, and the two ends of each second telescopic structure are respectively connected to the bottom surface of the box body and the frame, and the second telescopic structure is used to drive the box body to move along the direction of the elastic force of the first elastic member.

[0011] According to the present invention, a pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency also includes: multiple vibration acceleration sensors and a controller, the multiple vibration acceleration sensors are respectively arranged on the clamp and the frame, and the controller is used to control the movement amount of the first telescopic structure and the second telescopic structure according to the vibration acceleration signals sent by the vibration acceleration sensors.

[0012] According to the present invention, a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency is provided. The first telescopic structure includes: a first driver and a first telescopic member, and the first driver and the first telescopic member are arranged in the box body; the first driver is connected to the first telescopic member, and the first telescopic member is connected to the second elastic member. When the first driver moves, it can drive the first telescopic member to expand and contract, so as to adjust the pre-compression amount of the second elastic member.

[0013] According to a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency provided by the present invention, each of the stiffness adjustment mechanisms also includes a first baffle; the first baffle is arranged between the first telescopic member and the second elastic member, the first baffle is connected to the first telescopic member, and can move under the action of the first telescopic member, and the second elastic member abuts against the first baffle.

[0014] According to the pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency provided by the present invention, each of the stiffness adjustment mechanisms further includes a connecting rod, and both ends of the connecting rod are respectively connected to the protrusion and the second elastic member.

[0015] According to a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency provided by the present invention, each second telescopic structure includes: a second driver and a second telescopic member, the second driver is connected to the bottom surface of the frame, and the two ends of the second telescopic member are respectively connected to the second driver and the box body, and when the second driver moves, it can drive the second telescopic member to extend and retract, thereby driving the box body to move.

[0016] According to the present invention, a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency also includes a plurality of metal damping blocks. The metal damping blocks are arranged between the end of the clamp and the frame, and between the box and the frame. The metal damping blocks are slidably connected to the frame.

[0017] According to a pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency provided by the present invention, the clamp includes a pair of clamps, which are arranged opposite to each other to fix the pipeline, wherein the clamp located at the bottom is provided with the protrusion.

[0018] The pipeline support vibration isolation device provided by the present invention has adjustable load-bearing capacity and vibration isolation frequency. By arranging a first elastic member and a second elastic member, and placing the second elastic member in a compressed state, and utilizing a combination of positive stiffness and negative stiffness, it is possible to ensure that the pipeline support vibration isolation device has a larger static stiffness value and a smaller dynamic stiffness value, thereby effectively isolating low-frequency vibrations while providing effective support. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of the pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency provided by the present invention.

[0021] Figure 2 This is the second structural schematic diagram of the pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency provided by the present invention.

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure of the stiffness adjustment mechanism shown in FIG.

[0023] Reference numerals:

[0024] 1. Frame; 2. Clamp; 21. Clamp; 3. First elastic member; 4. Metal damping block; 5. Stiffness adjustment mechanism; 51. Box; 52. Second elastic member; 53. First driver; 54. First baffle; 55. Second baffle; 56. Connecting rod; 57. First telescopic member; 61. Second driver; 62. Second telescopic member; 7. Vibration acceleration sensor; 8. Controller; 211. Bump. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] The following combination Figure 1-Figure 3 The invention describes a pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency.

[0027] like Figure 1As shown, in an embodiment of the present invention, a pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency includes: a frame 1, a clamp 2, a first elastic member 3 and a pair of stiffness adjustment mechanisms 5. The clamp 2 is used to fix the pipeline, and the opposite ends of the clamp 2 are respectively slidably connected to the side walls of the frame 1. The clamp 2 is provided with a protrusion 211, and the protrusion 211 is connected to the bottom surface of the frame 1 through the first elastic member 3. A pair of stiffness adjustment mechanisms 5 are respectively arranged on both sides of the protrusion 211. Each stiffness adjustment mechanism 5 includes: a box body 51 and a second elastic member 52. The box body 51 is slidably connected to the side wall of the frame 1. The second elastic member 52 is arranged in the box body 51. One end of the second elastic member 52 passes through the box body 51 and is connected to the protrusion 211, wherein the second elastic member 52 is in a compressed state.

[0028] Specifically, in this embodiment, the frame 1 includes: a pair of side plates and a bottom plate, wherein the pair of side plates are relatively arranged on both sides of the bottom plate and connected to the bottom plate. The frame 1 is installed on a fixed structure. The clamp 2 includes a pair of clamps 21, which are relatively arranged to place the pipeline in the pair of clamps 21. The pair of clamps 21 are connected by bolts, and the pipeline can generate vertical vibration in the clamp 2. The opposite ends of the clamp 2 are respectively slidably connected to the side plates of the frame 1. The lower part of the clamp 21 is provided with a protrusion 211, and the protrusion 211 is connected to the bottom plate of the frame 1 through the first elastic member 3. When the load of the pipeline is different, the distance between the clamp 2 and the bottom plate of the frame 1 is different. At this time, the compression amount of the first elastic member 3 is different.

[0029] Two boxes 51 are respectively arranged on both sides of the protrusion 211, and each box 51 is slidably connected to the side plate of the frame 1. The purpose is: when the compression amount of the first elastic member 3 is different, the position of the box 51 is different, so that the connection part of the second elastic member 52 and the protrusion 211 is always horizontal. In this embodiment, the second elastic member 52 is arranged in the box 51 and is in a compressed state. The second elastic member 52 provides negative stiffness in the vertical direction. Through the combination of the positive stiffness and negative stiffness of the three elastic members, a quasi-zero stiffness can be provided at the static equilibrium position of the pipeline, that is, a larger static stiffness value and a smaller dynamic stiffness value are provided near the static equilibrium position of the pipeline. The larger static stiffness value can ensure that the pipeline support vibration isolation device has a smaller deformation under the gravity of the pipeline, while the smaller dynamic stiffness value can reduce the vibration absorption frequency of the pipeline support vibration isolation device and improve the low-frequency vibration absorption performance.

[0030] The pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency provided in an embodiment of the present invention can ensure that the pipeline support vibration isolation device has a larger static stiffness value and a smaller dynamic stiffness value by arranging a first elastic member and a second elastic member, and placing the second elastic member in a compressed state, and utilizing a combination of positive stiffness and negative stiffness, thereby effectively isolating low-frequency vibrations while providing effective support.

[0031] like Figure 1 As shown, in an embodiment of the present invention, each stiffness adjustment mechanism 5 also includes a first telescopic structure, which is arranged in a box body 51 and connected to a second elastic member 52. The first telescopic structure is used to drive the second elastic member 52 to compress, so as to adjust the pre-compression amount of the second elastic member 52, thereby changing the negative stiffness characteristic curve of the pipeline support vibration isolation device, so that the pipeline support vibration isolation device can absorb vibration under different loads. In an optional embodiment of the present invention, the first telescopic structure can be a device capable of telescopic movement, such as a hydraulic cylinder, a pneumatic cylinder, and an electric cylinder; in another optional embodiment of the present invention, the first telescopic structure includes: a first driver 53 and a first telescopic member 57, the first driver 53 is connected to the first telescopic member 57, the first telescopic member 57 is connected to the second elastic member 52, and when the first driver 53 moves, it drives the first telescopic member 57 to contract, thereby adjusting the pre-compression amount of the second elastic member 52. Optionally, the first driver 53 can be a linear motor.

[0032] Optionally, the first elastic member 3 and the second elastic member 52 may be springs.

[0033] like Figure 3 As shown, in the embodiment of the present invention, each stiffness adjustment mechanism 5 further includes a first baffle 54. The first baffle 54 is disposed between the first telescopic member 57 and the second elastic member 52. The first baffle 54 is connected to the first telescopic member 57. When the first driver 53 moves, it can push the first baffle 54 toward the direction of the protrusion 211, thereby adjusting the pre-compression amount of the second elastic member 52.

[0034] In an optional embodiment of the present invention, the box body 51 can be an open top, open front side, or open rear side structure to accommodate the first driver 53, the first telescopic member 57, the first baffle 54, and the second elastic member 52. One end of the second elastic member 52 passes through the plate surface of the box body 51 and is connected to the protrusion 211. In another optional embodiment, the end of the box body 51 adjacent to the protrusion 211 is an open end, so that the first driver 53, the first telescopic member 57, the first baffle 54, and the second elastic member 52 can be placed in the box body 51 through the open end. The open end is provided with a second baffle 55, and the second elastic member 52 passes through the second baffle 55 and is connected to the protrusion 211.

[0035] like Figure 3 As shown, each stiffness adjustment mechanism 5 further includes a connecting rod 56 , and both ends of the connecting rod 56 are connected to the protrusion 211 and the second elastic member 52 respectively.

[0036] like Figure 1As shown, in an embodiment of the present invention, the pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency also includes a second telescopic structure, the two ends of the second telescopic structure are respectively connected to the bottom plate of the frame 1 and the box 51, and the second telescopic structure is used to adjust the height of the box 51, so that after the height of the clamp 2 changes, the height of the box 51 changes accordingly, thereby making the connecting rod 56 always in a horizontal state, so that the height of the symmetrical point of the negative stiffness characteristic curve composed of the two second elastic members 52 is consistent with the balance height of the clamp 2.

[0037] Optionally, the second telescopic structure can be a device capable of telescopic movement, such as a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The second telescopic structure can also be a telescopic member, so that when the height of the clamp 2 changes, the height of the box 51 changes accordingly. The second telescopic structure can also include: a second driver 61 and a second telescopic member 62, the second driver 61 being connected to the bottom plate of the frame 1, and the two ends of the second telescopic member 62 being connected to the second driver 61 and the box 51, respectively. When the second driver 61 moves, it drives the second telescopic member 62 to extend and retract. When the second telescopic member 62 extends and retracts, it drives the box 51 to move in a vertical direction to adjust the height of the box 51. In this embodiment, the second driver 61 is a linear motor.

[0038] like Figure 2 As shown, in an embodiment of the present invention, the pipeline support vibration isolation device also includes: multiple vibration acceleration sensors 7 and a controller 8, the multiple vibration acceleration sensors 7 are respectively arranged on the clamp 2 and the frame 1, and the controller 8 is used to control the movement of the first telescopic structure and the second telescopic structure according to the vibration acceleration signal sent by the vibration acceleration sensor.

[0039] Specifically, the vibration acceleration sensor 7 is respectively arranged on the top of the clamp 2 and the outside of the frame 1, and is used to collect the vibration acceleration signal of the clamp 2 close to the pipeline and the vibration acceleration signal of the frame 1, and send the collected vibration acceleration signal to the controller 8. The controller 8 first performs Fourier transform on the vibration acceleration signal to obtain the excitation frequency. According to the principle that the excitation frequency is equal to the natural frequency of the pipeline support vibration isolation device, the stiffness of the pipeline support vibration isolation device is calculated, and the compression amount of the three elastic parts is obtained from the stiffness. The movement amount of the first driver 53 and the second driver 61 is controlled according to the compression amount, so that the natural frequency of the pipeline support vibration isolation device is equal to the excitation frequency.

[0040] like Figure 1As shown, in an embodiment of the present invention, the pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency further includes multiple metal damping blocks 4. Metal damping blocks 4 are installed between the ends of the clamp 2 and the side panels of the frame 1, and between the box 51 and the side panels of the frame 1. These metal damping blocks 4 can, to a certain extent, reduce the transmission of lateral vibration from the clamp 2 and box 51 to the frame 1. Furthermore, the metal damping blocks 4 are slidably connected to the side panels of the frame 1.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pipeline support vibration isolation device with adjustable bearing capacity and vibration isolation frequency, characterized in that: include: a frame, a clamp, a first elastic member, and a pair of stiffness adjustment mechanisms; The clamp is used to fix the pipeline, and the opposite ends of the clamp are respectively slidably connected to the side walls of the frame. The clamp is provided with a protrusion, and the protrusion is connected to the bottom surface of the frame through the first elastic member. A pair of stiffness adjustment mechanisms are respectively provided on both sides of the protrusion; Each of the stiffness adjustment mechanisms includes: a box body, a second elastic member, a first telescopic structure, and a first baffle, wherein the box body is slidably connected to the side wall of the frame, the second elastic member is disposed in the box body, one end of the second elastic member passes through the box body and is connected to the protrusion, wherein the second elastic member is in a compressed state, the first telescopic structure is disposed in the box body and connected to the second elastic member, and the first telescopic structure is used to adjust the pre-compression amount of the second elastic member; The first telescopic structure includes: a first driver and a first telescopic member, wherein the first driver and the first telescopic member are disposed in the housing; the first driver is connected to the first telescopic member, and the first telescopic member is connected to the second elastic member, and when the first driver moves, it can drive the first telescopic member to extend and retract, thereby adjusting the pre-compression amount of the second elastic member; The first baffle is disposed between the first telescopic member and the second elastic member. The first baffle is connected to the first telescopic member and is movable under the action of the first telescopic member. The second elastic member abuts against the first baffle.

2. The pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency according to claim 1, characterized in that: It also includes a pair of second telescopic structures, each of which has two ends connected to the bottom surface of the box and the frame respectively, and the second telescopic structures are used to drive the box to move along the direction of the elastic force of the first elastic member.

3. The pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency according to claim 2, characterized in that: Also includes: A plurality of vibration acceleration sensors and a controller, wherein the plurality of vibration acceleration sensors are respectively arranged on the fixture and the frame, and the controller is used to control the movement amount of the first telescopic structure and the second telescopic structure according to the vibration acceleration signals sent by the vibration acceleration sensors.

4. The pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency according to claim 1, characterized in that: Each of the stiffness adjustment mechanisms further includes a connecting rod, with two ends of the connecting rod respectively connected to the protrusion and the second elastic member.

5. The pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency according to claim 2, characterized in that: Each of the second telescopic structures includes: a second driver and a second telescopic member, the second driver is connected to the bottom surface of the frame, and the two ends of the second telescopic member are respectively connected to the second driver and the box body. When the second driver moves, it can drive the second telescopic member to extend and retract, thereby driving the box body to move.

6. The pipeline support vibration isolation device with adjustable load-bearing capacity and vibration isolation frequency according to claim 1, characterized in that: It also includes a plurality of metal damping blocks, which are arranged between the end of the clamp and the frame and between the box body and the frame, and are slidably connected to the frame.

7. The pipeline support vibration isolation device with adjustable load capacity and vibration isolation frequency according to claim 1, characterized in that: The clamp includes a pair of clamps, which are arranged opposite to each other to fix the pipeline, wherein the clamp located at the lower end is provided with the protrusion.

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