Annular clamp for high frequency damping

Abstract

This invention relates to an annular clamp for high-frequency vibration reduction. Two baffles (second and first) are installed on the front and rear sides of the clamp, and a cover plate is installed on the top of the clamp, forming a chamber. A positioning rod is installed within the chamber, and a vibrating body (first) is mounted on the positioning rod. A second vibrating body is installed inside the positioning rod. When the pipeline vibrates, it drives the positioning rod to vibrate synchronously. Under the action of inertial force, the first and second vibrating bodies will generate a reverse damping force on the pipeline. The first vibrating body is composed of multiple annular plates connected in series. During vibration, the annular plates rub against each other, converting the kinetic energy of the first vibrating body into heat energy. Through the combined effect of reverse damping and frictional energy dissipation, pipeline vibration is reduced, improving the product's performance and application range.

Description

Technical Field

[0001] This invention relates to a ring clamp for high-frequency vibration reduction, belonging to the field of vibration control technology. Background Technology

[0002] Vibration dampers are indispensable general-purpose equipment in industrial production. There are many types of vibration dampers. Commonly used products for pipeline vibration reduction include viscous dampers, hydraulic dampers, spring vibration dampers, and rubber vibration isolators. The working principle of these vibration dampers is to rely on the product structure to generate a damping force opposite to the direction of pipeline vibration to alleviate vibration. They are effective when the pipeline vibration frequency is less than 10Hz, and the effect is worse at higher frequencies. To address high-frequency vibrations in pipelines, a type of particle damper has emerged on the market. Its principle relies on the collisions and friction between solid particles inside the damper to convert kinetic energy into heat energy, thereby consuming the vibration energy of the pipeline and achieving vibration reduction. However, the vibration direction of the solid particles inside the particle damper is random, with some particles vibrating in the same direction as the pipeline vibration, even having a negative effect. Furthermore, the collisions between solid particles and the inner wall of the damper, as well as the collisions between solid particles themselves, are elastic collisions. Elastic collisions are energy transfer processes, consuming very little energy. Only some particles that rub against each other undergo energy conversion. For spherical solid particles, the collisions are merely point contacts, consuming even less energy. Therefore, the effect in practical applications is not significant, especially for pipeline vibrations with frequencies exceeding 50Hz. High-frequency vibrations in pipelines are common in the petrochemical industry, and a complete solution remains elusive. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an annular clamp for high-frequency vibration reduction. The clamp has a second baffle and a first baffle on its front and rear sides, respectively, and a cover plate on its top. The clamp, first baffle, cover plate, and second baffle together form a chamber. A positioning rod is installed within the chamber. A vibrating body is mounted on the outer circumference of the positioning rod, and a second vibrating body is inserted into the inner hole of the positioning rod. When the pipeline vibrates, the positioning rod vibrates synchronously. Due to the gap between the positioning rod and the first and second vibrating bodies, the first and second vibrating bodies always lag behind the pipeline vibration, generating a reverse damping force on the pipeline under inertial force. The first vibrating body is composed of multiple annular plates connected in series. During vibration, the annular plates rub against each other, converting the kinetic energy of the first vibrating body into heat energy. The reverse damping force and frictional energy dissipation jointly reduce the pipeline vibration energy, thus overcoming the problem of poor performance of existing vibration reduction products for high-frequency pipeline vibration.

[0004] The annular clamp for high-frequency vibration reduction described in this invention includes a horizontally arranged pipe clamp, a second baffle plate on the front side of the pipe clamp, a first baffle plate on the rear side of the pipe clamp, and a cover plate on the top of the pipe clamp. The pipe clamp, the first baffle plate, the cover plate, and the second baffle plate together form a chamber. Several freely vibrating vibrators are arranged in the chamber. The invention is characterized in that: several positioning rods are arranged axially in the chamber, and a first vibrator is fitted on each positioning rod. A certain gap is maintained between the first vibrator and the positioning rod. One end of the positioning rod is installed on the second baffle plate, and the other end of the positioning rod is installed on the first baffle plate.

[0005] In a further preferred embodiment, the vibrating body is composed of multiple annular plates connected in series, and each annular plate has several arc-shaped grooves on its inner hole.

[0006] In a further preferred embodiment, the positioning rod has a through hole, and several vibrating bodies are arranged in the through hole, with a certain gap maintained between the vibrating bodies and the through hole.

[0007] Further preferably, the inner hole of the vibrating body is a conical structure with a larger left end and a smaller right end, and the positioning rod is a conical structure with a thicker middle and thinner ends. The taper of the inner hole of the vibrating body is consistent with the taper of the outer circles at both ends of the positioning rod.

[0008] In a further preferred embodiment, an intermediate positioning plate is provided between the first baffle and the second baffle, and a positioning rod is mounted on the intermediate positioning plate. A vibrator is mounted on the positioning rod on both sides of the intermediate positioning plate.

[0009] In a further preferred embodiment, the top and bottom surfaces of the intermediate positioning plate are both arc-shaped structures, with its top connected to the cover plate and its bottom connected to the pipe clamp.

[0010] In a further preferred embodiment, both ends of the positioning rod are connected to an adjusting body, which is respectively mounted on baffle one and baffle two. Each adjusting body has a threaded hole corresponding to the through hole, and each threaded hole is fitted with a plug to prevent the second vibrator from leaking out. Each adjusting body is also fitted with an adjusting bolt for adjusting the position of the first vibrator.

[0011] Further preferably, the positioning rod is made of aluminum alloy, and the vibrator one and vibrator two are made of high carbon steel.

[0012] Further preferably, the second vibrator has a cylindrical or spherical structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The annular clamp for high-frequency vibration reduction described in the present invention has baffle two and baffle one respectively set on the front and rear sides of the pipe clamp, and a cover plate set on the top of the pipe clamp. The pipe clamp, baffle one, cover plate and baffle two together form a cavity. A positioning rod is set in the cavity. A vibrating body one is fitted on the outer circle of the positioning rod, and a vibrating body two is inserted into the inner hole of the positioning rod. Firstly, when the pipeline vibrates, it causes the positioning rod to vibrate synchronously. Because there are gaps between the positioning rod and vibrators one and two, vibrators one and two always lag behind the pipeline's vibration. Under the action of inertial force, they generate a reverse damping force on the pipeline and transfer some of the pipeline's vibration energy to vibrators one and two. Secondly, vibrator one is composed of multiple annular plates connected in series. During vibration, the sides of each annular plate rub against each other, converting the kinetic energy of vibrator one into heat energy. Thirdly, the outer taper of both ends of the positioning rod matches the inner taper of the vibrator one's hole. By adjusting the screws, the gap between vibrator one and the positioning rod can be changed. By replacing vibrators two with different diameters, the gap between vibrator two and the through hole of the positioning rod can be changed. The size of the gap determines the displacement and frequency of vibrators one and two. By adjusting the gap size, it can be ensured that the vibration frequency of the pipeline is consistent with the frequency of vibrators one and two, but the vibration direction is opposite, thereby improving the product's vibration reduction effect, adapting to a wider vibration frequency range, and compensating for the poor performance of existing vibration reduction products on high-frequency vibrations. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the positioning rod 6.

[0017] Figure 3 This is a schematic diagram of the structure of vibrator 4.

[0018] Figure 4 This is a schematic diagram of the structure of the annular plate 4.1.

[0019] Figure 5 This is a schematic diagram of the structure of the intermediate positioning plate 5.

[0020] In the diagram: 1. Pipe clamp, 2. Baffle 1, 3. Cover plate, 4. Vibrator 1, 4.1. Annular plate, 4.2. Arc groove, 5. Intermediate positioning plate, 6. Positioning rod, 6.1. Through hole, 7. Vibrator 2, 8. Baffle 2, 9. Adjusting body, 10. Plug, 11. Adjusting bolt. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. The present invention will be further illustrated by specific embodiments, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example

[0022] like Figure 1 As shown, the annular clamp for high-frequency vibration reduction includes a horizontally arranged pipe clamp 1, a second baffle 8 on the front side of the pipe clamp 1, a first baffle 2 on the rear side of the pipe clamp 1, and a cover plate 3 on the top of the pipe clamp 1. The pipe clamp 1, the first baffle 2, the cover plate 3, and the second baffle 8 together form a chamber, in which several freely vibrating vibrators are arranged. Several positioning rods 6 are arranged axially within the chamber, and a first vibrator 4 is fitted onto each positioning rod 6. A certain gap is maintained between the first vibrator 4 and the positioning rod 6. One end of the positioning rod 6 is installed on the second baffle 8, and the other end of the positioning rod 6 is installed on the first baffle 2.

[0023] The vibrating body 4 is composed of multiple annular plates 4.1 connected in series, and each annular plate 4.1 has several arc-shaped grooves 4.2 formed in its inner hole. Figure 3 , Figure 4 As shown, in this section of the technology, when each annular plate 4.1 collides with the positioning rod 6, the boundary line between the arc groove 4.2 and the inner hole will collide with the positioning rod at different angles, preventing each annular plate 4.1 from vibrating in the same direction, allowing any two adjacent annular plates 4.1 to rub against each other, continuously converting the kinetic energy of the annular plate 4.1 into heat energy and releasing it into the environment, thereby improving the conversion rate of vibration energy and benefiting the vibration reduction of the pipeline.

[0024] The positioning rod 6 has a through hole 6.1, and several vibrating bodies 7 are arranged inside the through hole 6.1, with a certain gap maintained between the vibrating bodies 7 and the through hole 6.1. Figure 1 , Figure 2 As shown in the figure, the technical design of this section includes a vibrator 7 inside the positioning rod 6, which can provide more damping force opposite to the direction of pipeline vibration, thus helping to reduce pipeline vibration.

[0025] The inner hole of the vibrating body 4 is a conical structure, larger at the left end and smaller at the right end. The positioning rod 6 is a conical structure, thicker in the middle and thinner at both ends. The taper of the inner hole of the vibrating body 4 is consistent with the taper of the outer circles at both ends of the positioning rod 6. Figure 1 , Figure 2 , Figure 3As shown, this technical design ensures that the gap between each annular plate 4.1 on the vibrating body 4 remains consistent with that between it and the positioning rod 6, allowing each annular plate 4.1 to simultaneously generate opposing damping forces, thereby improving the product's damping effect. The tapered design at both ends of the positioning rod 6 allows each annular plate 4.1 to fit together under gravity, and during vibration, adjacent annular plates 4.1 can rub against each other, which helps to improve the conversion of vibration energy.

[0026] An intermediate positioning plate 5 is provided between the first baffle 2 and the second baffle 8. Positioning rods 6 are mounted on the intermediate positioning plate 5, and vibrators 4 are fitted onto the positioning rods 6 on both sides of the intermediate positioning plate 5. Figure 1 As shown, this technical design improves the strength of the positioning rod 6, and more annular plates 4.1 can be installed by extending the length of the positioning rod 6, which helps to improve the damping effect of the product.

[0027] The top and bottom surfaces of the intermediate positioning plate 5 are both arc-shaped structures; its top is connected to the cover plate 3, and its bottom is connected to the pipe clamp 1. For example... Figure 1 , Figure 5 As shown in the diagram, the arc-shaped structure in this technical design is subjected to balanced forces, which improves the strength of the ring clamp, makes its structure more compact, and helps to reduce manufacturing costs.

[0028] Both ends of the positioning rod 6 are connected to adjusting bodies 9, which are respectively mounted on baffle 1 2 and baffle 2 8. Each adjusting body 9 has a threaded hole corresponding to the through hole 6.1, and each threaded hole is fitted with a plug 10 to prevent the vibrator 2 7 from leaking out. Each adjusting body 9 is also fitted with an adjusting bolt 11 for adjusting the position of the vibrator 1 4. Figure 1 As shown, this technical design facilitates the replacement of the second vibrator 7 inside the through hole 6.1. The gap between the second vibrator 7 and the through hole 6.1 can be adjusted by installing vibrators 7 of different diameters. The gap between the first vibrator 4 and the positioning rod 6 can be changed by screwing the adjusting bolt 11 into and out of the adjusting body 9. A larger gap is more suitable for low-frequency operating conditions, while a smaller gap is more suitable for high-frequency operating conditions, which helps the product meet more vibration frequency requirements and expands the product's application range.

[0029] The positioning rod 6 is made of aluminum alloy, while the vibrator 4 and vibrator 7 are made of high-carbon steel. Figure 1 As shown, in this technical design, the surface hardness of high-carbon steel is relatively high, while the surface hardness of aluminum alloy is relatively low. When vibrator 1 4 and vibrator 2 7 collide with positioning rod 6, the positioning rod 6 with lower stiffness will undergo plastic deformation, instantly sticking vibrator 1 4 and vibrator 2 7 to positioning rod 6, resulting in inelastic collision, thereby consuming some kinetic energy and helping to improve the conversion of vibration energy.

[0030] The vibrating body 7 has a cylindrical or spherical structure. For example... Figure 1 As shown, this technical design ensures that each vibrator 7 maintains an equal gap with the through hole 6.1, and each vibrator 7 can simultaneously generate a reverse damping force on the pipe vibration, thereby improving the product's vibration reduction effect.

[0031] like Figure 1 As shown, during installation, first fix the intermediate positioning plate 5 onto the pipe clamp 1, then insert each positioning rod 6 onto the intermediate positioning plate 5, and fit the vibrator 4 onto both ends of each positioning rod 6. Then install the adjusting body 9 onto both ends of the positioning rod 6. Install the baffle 8 and baffle 2 on the front and rear sides of the pipe clamp 1 respectively. Then install the cover plate 3 onto the top of the intermediate positioning plate 5 and connect it to the baffle 2 and baffle 8 respectively. Install the vibrator 7 that meets the size requirements into the through hole 6.1 of the positioning rod 6 through the threaded through hole of the adjusting body 9. Then plug the threaded through hole on the adjusting body 9 with the plug 10. Finally, install the adjusting bolt 11 into the adjusting body 9 and push the vibrator 4 to the appropriate position to complete the installation of the ring clamp.

[0032] like Figure 1As shown, during operation, the annular clamp is clamped onto the pipe using pipe clamp 1 and fixed with bolts. When the pipe vibrates, the vibration is first transmitted to the positioning rod 6 through the pipe clamp and intermediate positioning plate 5. Due to the gap between the positioning rod 6 and vibrating bodies 4 and 7, the vibration only displaces after impact with the positioning rod 6. Simultaneously, under the action of inertial force, vibrating bodies 4 and 7 exert a reverse force on the positioning rod 6. This force is transmitted to the pipe through the pipe clamp, providing damping. When vibrating bodies 4 and 7 collide with the positioning rod 6, the material stiffness of the positioning rod 6 is lower than that of vibrating bodies 4 and 7, causing the positioning rod 6 to undergo elastic deformation, thus dissipating some of the vibration energy. The vibration energy is converted into heat energy, thus consuming part of the vibration energy. Vibrating body 4 is composed of multiple annular plates 4.1 connected in series. Each annular plate 4.1 has multiple arc-shaped grooves 4.2 in its inner hole, preventing multiple annular plates 4.1 from vibrating in the same direction and allowing friction between any two adjacent annular plates 4.1. This continuously converts the kinetic energy of the annular plates 4.1 into heat energy, releasing it into the environment and improving the conversion effect of vibration energy. Since the annular clamp is an independent vibration system, when the vibration energy of the pipeline is transferred to the annular clamp, vibrating body 4 and vibrating body 7, which have a certain mass, absorb part of the pipeline's vibration, completing part of the vibration transfer. The vibration reduction of the annular clamp is achieved in three ways: first, the reverse damping effect of vibrating body 4 and vibrating body 7 buffers the vibration load of the pipeline; second, the plastic deformation of the positioning rod 6 and the mutual friction between the annular plates 4.1 convert kinetic energy into heat energy; and third, vibrating body 4 and vibrating body 7 transfer part of the pipeline's vibration energy, thereby achieving the purpose of vibration reduction.

[0033] like Figure 1 As shown, in the case of high pipeline vibration frequency, the higher the vibration frequency, the lower the displacement of the pipeline vibration. At this time, we need to adjust the gap between vibrator 4 and vibrator 7 and positioning rod 6. First, open the plug 10 on the adjusting body 9 with a wrench, pour out the original vibrator 7, replace it with a vibrator 7 with a larger diameter, and then install the plug 10. This reduces the gap between vibrator 7 and through hole 6.1. Next, screw the adjusting bolt 11 inward and push vibrator 4 inward. Since the positioning rod 6 has a tapered structure with a large middle and small ends, the gap between vibrator 4 and positioning rod 6 will decrease when vibrator 4 moves inward. Finally, make the gap between damper 4, damper 7 and positioning rod 6 equal to the amplitude of the pipeline, so that vibrator 4 and vibrator 7 form a vibration mode with the same frequency but opposite direction to the pipeline vibration, thereby achieving the best damping and vibration reduction effect.

[0034] like Figure 1As shown, in the case of low-frequency pipe vibration, the lower the vibration frequency, the higher the displacement of the pipe vibration. At this time, we need to adjust the gap between vibrator 4 and vibrator 7 and the positioning rod 6. First, open the plug 10 on the adjusting body 9 with a wrench, pour out the original vibrator 7, replace it with a vibrator 7 with one of smaller diameter, and then install the plug 10. This increases the gap between vibrator 7 and the through hole 6.1. Next, unscrew the adjusting bolt 11 outward. Under the action of gravity, vibrator 4 will slide outward. Since the structure of the positioning rod 6 is a cone with a large middle and small ends, the gap between vibrator 4 and the positioning rod 6 will increase when vibrator 4 moves outward. Finally, the gap between the damper 4, the damper 7 and the positioning rod 6 is equal to the amplitude of the pipe, so that the vibrator 4 and the damper 7 form a vibration mode with the same frequency but opposite direction to the pipe vibration, thereby achieving the best damping and vibration reduction effect.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments; the embodiments and descriptions in the specification are merely prisms of the invention, and these variations and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A ring clamp for high-frequency vibration reduction, comprising a horizontally arranged pipe clamp (1), a second baffle (8) provided on the front side of the pipe clamp (1), a first baffle (2) provided on the rear side of the pipe clamp (1), and a cover plate (3) provided on the top of the pipe clamp (1). The pipe clamp (1), the first baffle (2), the cover plate (3), and the second baffle (8) together form a chamber, in which a plurality of freely vibrating vibrating bodies are arranged, characterized in that: Several positioning rods (6) are arranged along the axial direction in the chamber. Each positioning rod (6) is fitted with a vibrating body (4). A certain gap is maintained between the vibrating body (4) and the positioning rod (6). One end of the positioning rod (6) is installed on the baffle (8), and the other end of the positioning rod (6) is installed on the baffle (2).

2. The annular clamp for high-frequency vibration reduction according to claim 1, characterized in that: The vibrating body (4) is composed of multiple annular plates (4.1) connected in series, and each annular plate (4.1) has several arc-shaped grooves (4.2) on its inner hole.

3. The annular clamp for high-frequency vibration reduction according to claim 1, characterized in that: The positioning rod (6) has a through hole (6.1) and several vibrating bodies (7) are installed in the through hole (6.1). A certain gap is maintained between the vibrating bodies (7) and the through hole (6.1).

4. The annular clamp for high-frequency vibration reduction according to claim 2, characterized in that: The inner hole of the vibrating body (4) is a conical structure with a larger left end and a smaller right end. The positioning rod (6) is a conical structure with a thicker middle and thinner ends. The taper of the inner hole of the vibrating body (4) is consistent with the taper of the outer circles at both ends of the positioning rod (6).

5. The annular clamp for high-frequency vibration reduction according to claim 1, characterized in that: An intermediate positioning plate (5) is provided between baffle one (2) and baffle two (8). The positioning rod (6) is mounted on the intermediate positioning plate (5). Vibrating body one (4) is mounted on the positioning rod (6) on both sides of the intermediate positioning plate (5).

6. The annular clamp for high-frequency vibration reduction according to claim 5, characterized in that: The top and bottom surfaces of the intermediate positioning plate (5) are both arc-shaped structures. Its top is connected to the cover plate (3), and its bottom is connected to the pipe clamp (1).

7. The annular clamp for high-frequency vibration reduction according to claim 3, characterized in that: Both ends of the positioning rod (6) are connected to adjusting bodies (9). The adjusting bodies (9) are respectively mounted on baffle one (2) and baffle two (8). Each adjusting body (9) has a threaded hole corresponding to the through hole (6.1). Each threaded hole is equipped with a plug (10) to prevent the vibration body two (7) from leaking out. Each adjusting body (9) is equipped with an adjusting bolt (11) for adjusting the position of the vibration body one (4).

8. The annular clamp for high-frequency vibration reduction according to claim 7, characterized in that: The positioning rod (6) is made of aluminum alloy, and the vibrator one (4) and vibrator two (7) are made of high carbon steel.

9. The annular clamp for high-frequency vibration reduction according to claim 8, characterized in that: The shape of the vibrating body 2 (7) is a cylindrical structure or a spherical structure.

Images