Pipeline tuned mass damping vibration attenuation device
By designing a cantilevered pipe tuned mass damper with variable pipe diameter, the problems of high-frequency vibration and different pipe diameters in thermal power plants are solved, flexible installation and efficient vibration reduction are achieved, and cost and time are reduced.
Patent Information
- Application Number
- CN202422866851.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-25
AI Technical Summary
The pipes in thermal power plants vibrate violently, and traditional TMD devices cannot adapt to high-frequency vibrations and different pipe diameters, resulting in uncertain treatment effects and high costs.
A variable diameter cantilever tuned mass damper is designed. Through the combination of multiple fixed half rings, cantilever beams, discus and adjustment components, adaptive connection to different pipe diameters is achieved, and vibration is reduced by adjusting the natural frequency of the damping rod.
It achieves flexible installation and efficient vibration reduction effect for pipes of different diameters, reduces installation cost and time, and improves the adaptability and effect of the vibration reduction system.
Smart Images
Figure CN223306538U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline vibration reduction in the thermal power field, in particular to a pipeline tuned mass damping vibration reduction device. Background Art
[0002] Pipelines, as crucial vehicles for media transmission, are widely used across various industries. Vibration is inevitable when media passes through them. Severe vibration can lead to fatigue fractures and weld cracking, causing leakage of the transmitted media and compromising equipment safety. This is particularly true in thermal power plants, where pipelines are complex, dispersed, and interconnected with numerous devices. Furthermore, the transmitted media are flammable, explosive, high-temperature, and high-pressure, making leakage a serious threat to human safety.
[0003] Pipeline vibration control measures generally include installing brackets, expansion joints, changing the pipeline design structure or installing dampers, but there are defects such as a single control method, limitations such as site conditions, cost, renovation time, and uncertainty in expected control effects. Pipeline vibration control has become a technical challenge.
[0004] A tuned mass damper (TMD) primarily consists of a spring, a mass, and a damping system. Its operating principle is that when the main structure vibrates, the TMD's own frequency approaches the main structure's operating frequency, causing resonance with the main structure and generating vibrations. The damping system dissipates the generated vibration energy, achieving the main structure's vibration reduction effect. TMDs are widely used in pipeline vibration control due to their simple structure, low cost, and the fact that they do not require structural changes.
[0005] Traditional TMDs typically use springs to adjust system stiffness, but springs are generally suitable for low-frequency vibrations. High-frequency vibrations are common in thermal power plants, making springs inadequate for system stiffness. Furthermore, thermal power plants require pipes of varying diameters depending on the type, temperature, and pressure of the medium being transported, but traditional TMDs are generally only suitable for pipes of a constant diameter. Based on this, the present invention designs a variable-diameter cantilevered pipe tuned mass damper structure.
[0006] Therefore, a pipeline tuned mass damping vibration reduction device is proposed to solve the above problems. Utility Model Content
[0007] In order to make up for the above deficiencies, the utility model provides a pipeline tuned mass damping vibration reduction device, which aims to improve the problems of being inconvenient to disassemble and unable to change according to the diameter of the pipeline.
[0008] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a pipeline tuned mass damping vibration reduction device, comprising a plurality of fixed half rings, a cantilever beam is slidably connected to the interior of the fixed half ring, a frequency modulation component is arranged on the outside of the cantilever beam, a discus is fixedly connected to the adjacent ends of the plurality of cantilever beams, a damping component is arranged between the discus and the fixed half ring, and an adjustment component is arranged between two adjacent fixed half rings;
[0009] The frequency modulation component includes a mass block, the interior of the mass block is slidably connected to the outside of the cantilever beam, a storage box is sleeved on the outside of the mass block, a fixed block is fixedly connected to the outside of the storage box, and a fixed component is arranged inside the fixed block.
[0010] As a further description of the above technical solution:
[0011] The shock absorbing assembly includes a shock absorbing spring and at least one damping rod. The shock absorbing spring is arranged between adjacent discus and fixed half ring. One end of the damping rod is rotatably connected to the inner wall of the fixed half ring, and the other end of the damping rod is rotatably connected to the outer wall of the discus.
[0012] As a further description of the above technical solution:
[0013] The adjustment component includes a hinge, a plurality of screw holes are provided on both sides of the hinge, and bolts are threadedly connected on both sides of the fixing half ring, and the middle part of the bolt passes through one of the screw holes.
[0014] As a further description of the above technical solution:
[0015] The fixing assembly includes a shell, the outer wall of the shell is fixedly connected to the inside of the fixing block, a latch is slidably connected to the inside of the shell, a reset spring is sleeved on the outside of the latch, and a pad is fixedly connected to the outside of the latch.
[0016] As a further description of the above technical solution:
[0017] One end of the return spring is fixedly connected to one side of the backing plate, and the other end of the return spring is fixedly connected to the inner wall of the shell.
[0018] As a further description of the above technical solution:
[0019] A plurality of circular holes are provided on the outer side of the cantilever beam, and the latch passes through the fixing block and is inserted into one of the circular holes.
[0020] As a further description of the above technical solution:
[0021] One end of the shock-absorbing spring is fixedly connected to the inner wall of the fixed semi-ring, the other end of the shock-absorbing spring is fixedly connected to the outer side of the discus, and the middle part of the shock-absorbing spring is sleeved on the outer side of the cantilever beam.
[0022] As a further description of the above technical solution:
[0023] The outer side of the backing plate is slidably connected to the inside of the shell, and the end of the latch away from the circular hole is fixedly connected to a pull ring.
[0024] The utility model has the following beneficial effects:
[0025] 1. In this utility model, the pipe to be damped is mounted between two discs, and two fixing half rings are connected together using hinges and bolts. The bolts are inserted into different screw holes to adjust the inner diameter of the fixing half rings, thereby fixing pipes of different sizes to be damped. This connection method is not only convenient for disassembly but also for assembly, and has high flexibility and practicality.
[0026] 2. In this utility model, the position of the mass on the cantilever beam can be easily adjusted by pulling a latch, thereby conveniently and effectively adjusting the natural frequency of the damping rod, achieving excellent vibration reduction for the vibration of the shock-absorbing tube in any direction. This design is simple in structure and low in cost, significantly reducing the manpower, material, financial, and time costs during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a three-dimensional schematic diagram of a pipeline tuned mass damping vibration reduction device proposed by the utility model;
[0028] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;
[0029] Figure 3 This is a schematic structural diagram of the explosion of the mass block fixing assembly of the pipeline tuned mass damping vibration reduction device proposed by the present invention;
[0030] Figure 4 for Figure 3 Enlarged schematic diagram of point B in the middle.
[0031] Legend:
[0032] 1. Discus; 2. Fixed half ring; 3. Cantilever beam; 4. Mass block; 5. Bolt; 6. Screw hole; 7. Shock-absorbing spring; 8. Damping rod; 9. Circular hole; 10. Fixed block; 11. Pad; 12. Return spring; 13. Latch; 14. Housing; 15. Storage box; 16. Hinge. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0034] Reference Figure 1 - Figure 4 The utility model provides an embodiment of a pipeline tuned mass damping vibration reduction device, comprising a plurality of fixed half rings 2, wherein a cantilever beam 3 is slidably connected to the interior of the fixed half ring 2, a frequency modulation component is provided on the outside of the cantilever beam 3, a discus 1 is fixedly connected to the adjacent ends of the plurality of cantilever beams 3, a damping component is provided between the discus 1 and the fixed half ring 2, and an adjustment component is provided between two adjacent fixed half rings 2;
[0035] The frequency modulation component includes a mass block 4, which is internally slidably connected to the outside of the cantilever beam 3. A storage box 15 is provided on the outside of the mass block 4, and a fixed block 10 is fixedly connected to the outside of the storage box 15. A fixed component is provided inside the fixed block 10. The fixed half ring 2 cooperates with the discus 1 to fix the pipeline and support the entire vibration damping device. The cantilever beam 3 is slidably connected inside the fixed half ring 2, serving as the bearing base of the frequency modulation component, and is used to support and adjust the position of the mass block 4, affecting the natural frequency and vibration response of the damping rod 8. The discus 1 is fixed at one end between adjacent cantilever beams 3, and its surface contacts the pipe to be damped, playing a balancing and supporting role. There are multiple mass blocks 4 in the storage box 15, and they are slidably connected together to the outside of the cantilever beam 3. The natural frequency of the damping rod 8 is changed by adjusting its position on the cantilever beam 3. The storage box 15 is used to accommodate and protect multiple mass blocks 4, and the fixed block 10 provides support for the fixed component.
[0036] Reference Figure 1 and Figure 2The shock-absorbing assembly includes a shock-absorbing spring 7 and at least one damping rod 8. The shock-absorbing spring 7 is arranged between adjacent discus 1 and fixed half ring 2. One end of the damping rod 8 is rotatably connected to the inner wall of the fixed half ring 2, and the other end of the damping rod 8 is rotatably connected to the outer wall of the discus 1. The shock-absorbing spring 7 is arranged between the adjacent discus 1 and the fixed half ring 2 to absorb vibration, store and release energy through elastic deformation, and reduce the intensity of vibration transmitted to the pipeline system. When the discus 1 is deviated from its position by vibration, the shock-absorbing spring 7 can help it return to its initial state. One end of the damping rod 8 is rotatably connected to the inner wall of the fixed half ring 2 to ensure the installation stability of the damping rod 8, while allowing it to adjust its angle according to the vibration direction. The other end is rotatably connected to the outer wall of the discus 1 to be able to move with the vibration of the discus 1 to provide a dynamic damping effect. The damping rod 8 converts vibration energy into heat energy or other forms of energy through the internal damping medium (such as liquid, gas or solid friction), thereby reducing the amplitude and duration of vibration, enhancing the energy dissipation capability of the shock-absorbing system, and avoiding vibration resonance in the system.
[0037] Reference Figure 1 and Figure 2 The adjustment component includes a hinge 16, and a plurality of screw holes 6 are opened on both sides of the hinge 16. Bolts 5 are threadedly connected on both sides of the interior of the fixed half ring 2. The middle of the bolt 5 passes through one of the screw holes 6. The hinge 16 and the bolt 5 work together to connect the two fixed half rings 2. The bolts 5 are inserted into different screw holes 6 to achieve the diameter of the ring composed of the fixed half rings 2.
[0038] Reference Figure 3 and Figure 4 The fixing component includes a shell 14, the outer wall of the shell 14 is fixedly connected to the inside of the fixed block 10, and a pin 13 is slidably connected to the inside of the shell 14. A reset spring 12 is sleeved on the outside of the pin 13, and a pad 11 is fixedly connected to the outside of the pin 13. The shell 14 is used to carry the various components inside it to ensure normal operation. The pin 13 is used to be inserted into a circular hole 9 on the cantilever beam 3, thereby ensuring the fixation of the mass block 4. The reset spring 12 is used to tightly insert the pin 13 into the circular hole 9 in the absence of external force, thereby ensuring the stability of the mass block 4. The pad 11 is used to prevent the pin 13 from being pulled out of the shell 14.
[0039] Reference Figure 1 - Figure 4 A plurality of circular holes 9 are provided on the outside of the cantilever beam 3. The pin 13 passes through the fixing block 10 and is inserted into one of the circular holes 9. The pin 13 is inserted into the circular holes 9 at different positions, thereby fixing the mass block 4 at different positions on the cantilever beam 3.
[0040] Reference Figure 1 - Figure 4One end of the shock-absorbing spring 7 is fixedly connected to the inner wall of the fixed half ring 2, and the other end of the shock-absorbing spring 7 is fixedly connected to the outside of the discus 1, and the middle part of the shock-absorbing spring 7 is sleeved on the outside of the cantilever beam 3. The combination of the shock-absorbing spring 7 and the cantilever beam 3 enables the device to provide strong adaptability and shock-absorbing effect when facing different types of vibrations. The shock-absorbing spring 7 absorbs vibration energy and the cantilever beam 3 provides stable support, so that the system can work effectively in a variety of vibration environments.
[0041] Reference Figure 4 The outer side of the pad 11 is slidably connected to the inside of the shell 14, and the end of the latch 13 away from the circular hole 9 is fixedly connected to a pull ring, which is used to facilitate pulling the latch 13.
[0042] Working principle: First, two discus 1 are fitted to the surface of the tube to be damped, and two fixed half rings 2 are connected via hinges 16 and bolts 5. This operation is repeated until the four fixed half rings 2 are fully connected, ultimately forming a structure in which the tube to be damped is fixed by four discus 1. The bolts 5 can be inserted into different screw holes 6 on the hinges 16 to adjust the inner diameter of the ring formed by the fixed half rings 2, thereby adapting to tubes of different sizes to be damped. This connection method is not only easy to disassemble but also flexible to assemble, and has good practicality. When it is necessary to adjust the natural frequency of the damping rod 8, the pad 11 can be slid inside the shell 14 by pulling the pin 13, while compressing the return spring 12. When the pin 13 is pulled out of the circular hole 9 on the cantilever beam 3, the storage box 15 and the mass block 4 inside it can slide along the cantilever beam 3. After sliding to the appropriate position on the cantilever beam 3, the pin 13 is released and reinserted into the corresponding circular hole 9 to complete the fixation of the position of the mass block 4. This adjustment method is convenient and efficient, and can effectively adjust the natural frequency of the damping rod 8, thereby achieving an excellent vibration reduction effect on the vibration of the shock-absorbing tube in any direction.
[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A pipeline tuned mass damping vibration reduction device, comprising a plurality of fixed half rings (2), characterized in that: The fixed half ring (2) is internally slidably connected to a cantilever beam (3), a frequency modulation component is provided on the outside of the cantilever beam (3), a plurality of cantilever beams (3) are fixedly connected to a discus (1) at one end thereof, a shock absorbing component is provided between the discus (1) and the fixed half ring (2), and an adjustment component is provided between two adjacent fixed half rings (2); The frequency modulation component comprises a mass block (4), the interior of the mass block (4) is slidably connected to the outside of the cantilever beam (3), a storage box (15) is sleeved on the outside of the mass block (4), a fixed block (10) is fixedly connected to the outside of the storage box (15), and a fixed component is arranged inside the fixed block (10).
2. A pipeline tuned mass damping vibration reduction device according to claim 1, characterized in that: The shock absorbing assembly comprises a shock absorbing spring (7) and at least one damping rod (8), wherein the shock absorbing spring (7) is arranged between adjacent discus (1) and a fixed half ring (2), one end of the damping rod (8) is rotatably connected to the inner wall of the fixed half ring (2), and the other end of the damping rod (8) is rotatably connected to the outer wall of the discus (1).
3. The pipeline tuned mass damping vibration reduction device according to claim 1, characterized in that: The adjustment assembly includes a hinge (16), a plurality of screw holes (6) are provided on both sides of the hinge (16), and bolts (5) are threadedly connected on both sides of the fixing half ring (2), and the middle of the bolt (5) passes through one of the screw holes (6).
4. The pipeline tuned mass damping vibration reduction device according to claim 3, characterized in that: The fixing assembly comprises a shell (14), the outer wall of the shell (14) is fixedly connected to the interior of the fixing block (10), a latch (13) is slidably connected to the interior of the shell (14), a return spring (12) is sleeved on the outer side of the latch (13), and a pad (11) is fixedly connected to the outer side of the latch (13).
5. The pipeline tuned mass damping vibration reduction device according to claim 4, characterized in that: One end of the return spring (12) is fixedly connected to one side of the backing plate (11), and the other end of the return spring (12) is fixedly connected to the inner wall of the housing (14).
6. The pipeline tuned mass damping vibration reduction device according to claim 4, characterized in that: A plurality of circular holes (9) are provided on the outside of the cantilever beam (3), and the latch (13) passes through the fixing block (10) and is inserted into one of the circular holes (9).
7. The pipeline tuned mass damping vibration reduction device according to claim 2, characterized in that: One end of the shock-absorbing spring (7) is fixedly connected to the inner wall of the fixed half ring (2), the other end of the shock-absorbing spring (7) is fixedly connected to the outside of the discus (1), and the middle part of the shock-absorbing spring (7) is sleeved on the outside of the cantilever beam (3).
8. The pipeline tuned mass damping vibration reduction device according to claim 6, characterized in that: The outer side of the pad (11) is slidably connected to the inside of the shell (14), and the end of the latch (13) away from the circular hole (9) is fixedly connected to a pull ring.