Particle damper for tubular structures

Abstract

The application discloses a granular damper for a tubular structure, which comprises: granular damping units, each of which comprises a cavity, a connecting piece, an end plate, damping granules, a sliding plate and an adjusting screw rod; the cavity is tubular with both ends open; the connecting piece is arranged at one end of the cavity, and the end plate covers the other end of the cavity; the sliding plate is arranged in the cavity and can slide along the axial direction of the cavity, and divides the space in the cavity into a granular cavity and an adjusting cavity; the adjusting screw rod is threadedly connected with the connecting piece and connected with the sliding plate; the damping granules are arranged in the granular cavity and can move along the axial direction of the granular cavity; and an amplification arm, one end of which is adapted to be connected with the tubular structure, and the granular damping units are movably arranged on the amplification arm along the length direction of the amplification arm. The granular damper for the tubular structure has the advantages of strong applicability, good damping effect and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline transportation vibration reduction, in particular to a granular damper for pipe structures. BACKGROUND

[0002] Pipeline transportation, as an economical and effective energy transportation method, has been widely applied in the fields of petroleum transportation engineering, aviation engineering, ocean engineering, chemical industry and nuclear industry.

[0003] Pipe structures will inevitably vibrate under the action of internal gas-liquid coupling, mechanical vibration, water hammer and the like, which may affect the normal use of the pipe structures, increase the application cost, and even affect the reliability of the equipment and pipe structure system.

[0004] One of the important methods to solve the pipe vibration problem is to install a damper on the pipe structure to achieve vibration control of the pipe structure. The granular damper is one of the dampers for pipe structures, which suppresses the vibration of the controlled structure through the collision and friction effect of the particles in the granular damper and other structures when the controlled structure vibrates.

[0005] If the amplitude and frequency of the vibration generated by the controlled pipeline are too small in the granular damper for pipe structures in the related art, the damping effect of the granular damper may not work effectively, for example, when the controlled pipeline generates vibration in the vertical direction and the vibration acceleration is less than the gravity acceleration, the particles of the damper cannot overcome the gravity to generate movement, at this time, the particles as counterweights participate in the vibration of the controlled structure and cannot produce damping effect, which affects the damping effect of the granular damper. SUMMARY

[0006] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a granular damper for pipe structures, which has the advantages of strong applicability, good damping effect and the like.

[0007] To achieve the above object, the granular damper for the tubular structure according to an embodiment of the present application comprises: a granular damping unit, the granular damping unit comprises a cavity, a connecting piece, an end plate, damping granules, a sliding plate and an adjusting screw, the cavity is a tubular structure with both ends open, the connecting piece is arranged at one end of the cavity and the end plate covers the other end of the cavity, the sliding plate is arranged axially in the cavity and separates the space in the cavity into a granular cavity and an adjusting cavity, the adjusting screw is threadedly connected with the connecting piece and connected with the sliding plate, and the damping granules are arranged axially in the granular cavity.

[0008] The granular damper for the tubular structure according to the embodiment of the present application has the advantages of strong applicability and good damping effect.

[0009] In addition, the granular damper for the tubular structure according to the above embodiment of the present application can also have the following additional technical features:

[0010] According to an embodiment of the present application, four granular damping units are arranged on each of the amplification arms, and the four granular damping units comprise two upper damping units and two lower damping units, the two upper damping units are arranged in parallel and spaced apart in the axial direction and connected by an upper connecting plate, the two lower damping units are arranged in parallel and spaced apart in the axial direction and connected by a lower connecting plate, the two upper damping units are coaxially arranged corresponding to the two lower damping units respectively, the upper connecting plate and the lower connecting plate are connected by a plurality of fasteners, the amplification arm is provided with a guide groove extending in the length direction of the amplification arm, the amplification arm is clamped between the upper connecting plate and the lower connecting plate, and at least part of the plurality of fasteners is slidably fitted in the guide groove.

[0011] According to an embodiment of the present application, the amplification arms are two, and the two amplification arms are arranged opposite in the circumferential direction of the tubular structure, and one or more granular damping units are arranged on each of the amplification arms.

[0012] According to an embodiment of the present application, the amplification arms are connected with the tubular structure by a hoop.

[0013] According to an embodiment of the present application, the damping granules are made of steel material, glass material or lead material.

[0014] According to an embodiment of the present application, the damping granules are coated with a flexible noise reduction layer.

[0015] According to an embodiment of the present application, the flexible noise reduction layer is a layer of rubber material or a layer of polyurethane material.

[0016] According to an embodiment of the present application, the diameter of the particle cavity is 1.1-1.3 times the diameter of the damping particle.

[0017] According to an embodiment of the present application, the weight of the particle damper for tubular structure is less than or equal to 15% of the weight of the tubular structure.

[0018] According to an embodiment of the present application, the axial direction of the particle cavity is the same as the vibration direction of the tubular structure, and the thickness direction of the amplification arm is parallel to the axial direction of the particle cavity.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings.

[0021] Figure 1 is a structural diagram of a particle damper for tubular structure according to an embodiment of the present application.

[0022] Figure 2 is a structural diagram of a particle damper for tubular structure according to an embodiment of the present application.

[0023] Figure 3 is an exploded view of a particle damper for tubular structure according to an embodiment of the present application.

[0024] Figure 4 is a sectional view of a particle damper for tubular structure according to an embodiment of the present application.

[0025] Figure 5 is a structural diagram of a particle damping unit of a particle damper for tubular structure according to an embodiment of the present application.

[0026] Figure 6 is an exploded view of a particle damping unit of a particle damper for tubular structure according to an embodiment of the present application.

[0027] Reference numerals: 1. Particle vibration damper for tubular structures; 10. Particle vibration damping unit; 11. Upper vibration damping unit; 12. Lower vibration damping unit; 100. Cavity; 101. Particle cavity; 102. Adjustment cavity; 110. Assembly hole; 200. Connector; 210. Main plate; 220. Nut; 230. Mounting plate; 231. Mounting hole; 300. End plate; 400. Vibration damping particles; 500. Sliding plate; 600. Adjusting screw; 700. Bolt; 20. Amplifying arm; 21. Guide groove; 22. Clamp; 31. Upper connecting plate; 32. Lower connecting plate; 40. Fastener; 2. Tubular structure. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] The particle vibration damper 1 for tubular structures according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] like Figures 1-6 As shown, the particle vibration damper 1 for tubular structures according to an embodiment of the present invention includes a particle vibration damping unit 10 and an amplifying arm 20.

[0033] The particle damping unit 10 comprises a cavity 100, a connecting piece 200, an end plate 300, damping particles 400, a sliding plate 500, and an adjusting screw 600. The cavity 100 is a tube with both ends open. The connecting piece 200 is arranged at one end of the cavity 100, and the end plate 300 covers the other end of the cavity 100. The sliding plate 500 is arranged in the cavity 100 and can slide axially along the cavity 100, and divides the space in the cavity 100 into a particle cavity 101 and an adjusting cavity 102. The adjusting screw 600 is threadedly connected with the connecting piece 200 and connected with the sliding plate 500. The damping particles 400 are arranged in the particle cavity 101 and can move axially along the particle cavity 101. One end of the amplification arm 20 is adapted to be connected with the tubular structure 2, and the particle damping unit 10 is arranged on the amplification arm 20 and can move along the length direction of the amplification arm 20.

[0034] Specifically, when the tubular structure 2 vibrates, the vibration of the tubular structure 2 is transmitted to the amplification arm 20 through the end of the amplification arm 20 connected with the tubular structure 2, and then transmitted to the particle damping unit 10 after the vibration is amplified by the amplification arm 20. When the particle damping unit 10 vibrates, the damping particles 400 vibrate in the particle cavity 101 relative to the cavity 100 and collide with the inner wall of the particle cavity 101. The momentum exchange between the damping particles 400 and the particle cavity 101 and the collision energy consumption can effectively control the vibration of the tubular structure 2.

[0035] The adjusting screw 600 can convert the rotation of the adjusting screw 600 into the axial movement of the adjusting screw 600 through the thread connection with the connecting piece 200, so as to drive the sliding plate 500 to move.

[0036] The particle damper 1 for the tubular structure according to the embodiment of the present application can realize damping by the collision between the damping particles 400 and the particle cavity 101 of the cavity 100 through the particle damping unit 10, and has the advantages of wide damping frequency band, low cost, flexible layout, no need for frequent maintenance, not sensitive to temperature change, and can be used in harsh environment, compared with other damping devices.

[0037] And, by setting the amplification arm 20, the vibration of the tubular structure 2 is transmitted to the particle damping unit 10 through the amplification arm 20, so that when the tubular structure 2 vibrates, the acceleration of the vibration can be amplified through the amplification arm 20, and the collision between the damping particles 400 and the inner wall of the particle cavity 101 is more violent. Compared with the technical solution in the related art in which the particle damper is directly installed on the tubular structure, when the amplitude and frequency of the tubular structure 2 are too low, the problem that the particles are difficult to overcome the action of gravity and collide with other structures can be avoided. The damping particles 400 can overcome the action of gravity and move vertically, and the damping particles 400 can collide with the inner wall of the particle cavity 101, so that the momentum exchange and energy consumption during the collision are facilitated, thereby effectively controlling the vibration of the tubular structure 2. The particle damper 1 for the tubular structure can be applied to the tubular structure 2 with low-frequency and low-amplitude vibration, and the applicability and damping effect of the particle damper 1 for the tubular structure are improved.

[0038] In addition, the particle damping unit 10 is provided with the sliding plate 500, so that the sliding plate 500 can move in the axial direction of the cavity 100. The axial length of the particle cavity 101 defined by the sliding plate 500 can be adjusted, so that the vibration range of the damping particles 400 in the axial direction of the particle cavity 101 can be limited, and the damping frequency band of the particle damping unit 10 can be adjusted. The damping frequency band of the particle damping unit 10 is wider, and the applicability is wider.

[0039] Further, by enabling the particle damping unit 10 to slide along the length direction of the amplification arm 20, the vibration frequency of the particle damper 1 for the tubular structure can be conveniently adjusted, so that the vibration frequency of the particle damper 1 for the tubular structure is consistent with the vibration frequency of the tubular structure 2, thereby further improving the damping effect of the particle damper 1 for the tubular structure.

[0040] That is, the particle damper 1 for the tubular structure can be installed and debugged on site when the tubular structure 2 is running by adjusting the positions of the adjusting screw 600 and the particle damping unit 10 on the amplification arm 20, and can be applied to the original design that does not consider the vibration of the tubular structure 2, thereby further improving the applicability of the particle damper 1 for the tubular structure.

[0041] Therefore, the particle damper 1 for the tubular structure according to the embodiment of the present application has the advantages of strong applicability and good damping effect.

[0042] The particle damper 1 for the tubular structure according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0043] In some embodiments of the present application, as shown in Figures 1-6 The particle damper 1 for the tubular structure according to the embodiment of the present application includes a particle damping unit 10 and an amplification arm 20.

[0044] Specifically, as shown in Figures 1-3 each amplification arm 20 is mounted with four particle damping units 10, and the four particle damping units 10 include two upper damping units 11 and two lower damping units 12, the two upper damping units 11 are axially parallel and spaced apart, and are connected by an upper connecting plate 31, the two lower damping units 12 are axially parallel and spaced apart, and are connected by a lower connecting plate 32, the two upper damping units 11 are coaxially arranged one by one with the two lower damping units 12, the upper connecting plate 31 and the lower connecting plate 32 are connected by a plurality of fasteners 40, the amplification arm 20 is provided with a guide groove 21 extending along the length direction of the amplification arm 20, the amplification arm 20 is clamped between the upper connecting plate 31 and the lower connecting plate 32, and at least part of the plurality of fasteners 40 is slidably fitted in the guide groove 21. Specifically, the upper connecting plate 31 and the lower connecting plate 32 are connected by six fasteners 40, and the two fasteners 40 located in the middle part are slidably fitted in the guide groove 21. In this way, the plurality of particle damping units 10 can be used for damping, and the damping effect of the particle damper 1 for the tubular structure is further improved. The upper connecting plate 31 and the lower connecting plate 32 can facilitate the connection of the four particle damping units 10. The two upper damping units 11 are axially parallel and spaced apart, the two lower damping units 12 are axially parallel and spaced apart, and the two upper damping units 11 are coaxially arranged one by one with the two lower damping units 12, which can make the movement direction of the four damping particles 400 consistent, thereby facilitating the synchronous control of the four particle damping units 10 on the vibration.

[0045] Figure 1 A particle damper 1 for a tubular structure according to some embodiments of the present application is shown.

[0046] In some embodiments, as shown in Figure 1 the particle damper 1 for the tubular structure connected on the tubular segment of the tubular structure 2 whose axial direction is oriented in the vertical direction, the particle damper 1 for the tubular structure can include one amplification arm 20, and one or more particle damping units 10 are mounted on each amplification arm 20. Here, it is preferred that the particle damper 1 for the tubular structure includes one amplification arm 20 and four particle damping units 10.

[0047] In other embodiments, as shown in Figure 1 the particle damper 1 for the tubular structure connected on the tubular segment of the tubular structure 2 whose axial direction is oriented in the horizontal direction, the amplification arm 20 is two, the two amplification arms 20 are oppositely arranged in the circumferential direction of the tubular structure 2, and one or more particle damping units 10 are mounted on each amplification arm 20. Here, it is preferred that the particle damper 1 for the tubular structure includes two amplification arms 20 and eight particle damping units 10, and four particle damping units 10 are mounted on each amplification arm 20.

[0048] Advantageously, as shown in Figure 1 The amplification arm 20 is connected to the pipe structure 2 by the hoop 22. This facilitates the installation and removal of the granular damper 1 for the pipe structure, facilitates the implementation and maintenance of the granular damper 1 for the pipe structure, and facilitates the transmission of vibrations of the pipe structure 2 to the amplification arm 20.

[0049] Optionally, the damping granule 400 is a piece of steel material, a piece of glass material or a piece of lead material. This facilitates the manufacturing of the damping granule 400 and reduces the cost of the damping granule 400.

[0050] Further, the damping granule 400 is coated with a flexible noise reduction layer. This reduces the noise generated when the damping granule 400 collides with the inner wall of the granular cavity 101.

[0051] Still further, the flexible noise reduction layer is a layer of rubber material or a layer of polyurethane material. This makes the flexible noise reduction layer have good flexibility and facilitates the noise reduction effect of the flexible noise reduction layer.

[0052] Specifically, the diameter of the granular cavity 101 is 1.1-1.3 times the diameter of the damping granule 400. This allows the damping granule 400 to move smoothly in the granular cavity 101, reduces the movement of the damping granule 400 inclined to the axial direction of the granular cavity 101, reduces the inclined collision between the damping granule 400 and the inner wall of the granular cavity 101, and concentrates the movement of the damping granule 400 in the axial direction of the granular cavity 101, thereby facilitating the control of the vibration of the pipe structure 2 in the axial direction of the granular cavity 101.

[0053] More specifically, the weight of the granular damper 1 for the pipe structure is less than or equal to 15% of the weight of the pipe structure 2. This reduces the impact of the weight of the granular damper 1 for the pipe structure itself on the vibration of the pipe structure 2, reduces the burden on the pipe structure 2 when it vibrates, and facilitates the reliability of the pipe structure 2.

[0054] More advantageously, the axial direction of the granular cavity 101 is the same as the vibration direction of the pipe structure 2. Those skilled in the art can understand that the vibration direction of different pipe structures 2 is different, and the vibration direction of the pipe structure 2 is affected by its own structure, the material it transports, and the vibration of the power equipment such as the water pump connected to the pipe structure 2. Those skilled in the art can obtain the vibration direction of the pipe structure 2 through observation, analysis, calculation and detection of the pipe structure 2. By making the axial direction of the granular cavity 101 the same as the vibration direction of the pipe structure 2, the movement direction of the damping granule 400 is concentrated in the vibration direction of the pipe structure 2, thereby facilitating the control of the vibration of the pipe structure 2 and improving the control effect of the vibration of the pipe structure 2 in a certain direction.

[0055] Further, as shown in Figures 1-4As shown, the thickness direction of the amplification arm 20 is parallel to the axial direction of the particle cavity 101. In this way, the amplification arm 20 can be more easily deformed in the axial direction of the particle cavity 101, facilitating amplification of vibration in the axial direction of the particle cavity 101.

[0056] Further, as shown, the axial direction of the particle cavity 101 and the thickness direction of the amplification arm 20 can both be oriented in the vertical direction. In this way, the vibration of the vibration-damping particles 400 in the particle cavity 101 can be facilitated to overcome the force of gravity Figures 1-4

[0057] Other configurations and operations of the particle vibration damper 1 for a tubular structure according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.

[0058] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.​

Claims

1. A granular damper for tubular structures, characterized by, include: A particle vibration damping unit includes a cavity, a connector, an end plate, damping particles, a sliding plate, and an adjusting screw. The cavity is a tube open at both ends. The connector is located at one end of the cavity, and the end plate covers the other end of the cavity. The sliding plate is slidably disposed within the cavity along the axial direction of the cavity and divides the space within the cavity into a particle cavity and an adjusting cavity. The adjusting screw is threadedly engaged with the connector and connected to the sliding plate. The damping particles are movably disposed within the particle cavity along the axial direction of the particle cavity. An amplifying arm, one end of which is adapted to be connected to the tubular structure, and the particle vibration damping unit is movably mounted on the amplifying arm along its length. Each amplification arm is equipped with four particle damping units, and the four particle damping units include two upper damping units and two lower damping units. The two upper damping units are axially parallel and spaced apart and connected by an upper connecting plate. The two lower damping units are axially parallel and spaced apart and connected by a lower connecting plate. The two upper damping units are coaxially arranged in a one-to-one correspondence with the two lower damping units. The upper connecting plate and the lower connecting plate are connected by a plurality of fasteners. The amplification arm is provided with a guide groove extending along the length direction of the amplification arm. The amplification arm is clamped between the upper connecting plate and the lower connecting plate. At least a portion of the plurality of fasteners is slidably fitted in the guide groove. The diameter of the particle cavity is 1.1 to 1.3 times the diameter of the vibration-damping particle; The weight of the particle vibration damper used for tubular structures is less than or equal to 15% of the weight of the tubular structure. The axial direction of the particle cavity is the same as the vibration direction of the tubular structure, and the thickness direction of the amplification arm is parallel to the axial direction of the particle cavity.

2. The particle damper for a tubular structure according to claim 1, characterized by, There are two amplification arms, which are arranged opposite each other in the circumferential direction of the tubular structure.

3. The granular vibration damper for tubular structures of claim 1, wherein, The amplification arm is connected to the tubular structure via a clamp.

4. The granular vibration damper for tubular structures of claim 1, wherein, The vibration damping particles are made of steel, glass, or lead.

5. The granular vibration damper for tubular structures of claim 1, wherein, The vibration damping particles are covered with a flexible noise reduction layer.

6. A granular vibration damper for tubular structures according to claim 5, wherein, The flexible noise reduction layer is a rubber material layer or a polyurethane material layer.

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