A built-in damping vibration reduction device

Abstract

The present application relates to a built-in damping vibration reduction device, which includes a connecting cylinder and a damping group. The connecting cylinder has a placement area for placing a clamp for clamping a vibration reduction target; the damping group is arranged in the connecting cylinder and includes two hydraulic dampers. The two hydraulic dampers of the damping group are symmetrically arranged on both sides of the placement area. The cylinders of the two hydraulic dampers included in the damping group are connected through a conduit, and the piston rods of the hydraulic dampers are used to support the clamp. The interconnection of the two opposite hydraulic dampers is achieved through the conduit, thereby realizing the hydraulic inertia between the two hydraulic dampers of the damping group. The hydraulic inertia is used to provide negative stiffness for the structure, which can greatly improve the vibration control effect of the structure.

Description

Technical Field

[0001] The present application relates to the technical field of structural vibration control, and in particular to a built-in damping vibration reduction device. Background Art

[0002] As the span of cable-stayed bridges continues to increase, the length of cables is getting longer and longer, and the dynamic load response problem faced by cables is becoming increasingly prominent. As the main load-bearing component of cable-stayed bridges, cables are very likely to vibrate significantly under dynamic loads such as wind loads and traffic loads due to their high flexibility, light weight, and low damping. The continuous shaking of cables will not only cause fatigue damage to the cables and their auxiliary structures, causing hidden dangers to the safety structure of the bridge, but will also cause discomfort and insecurity to passing pedestrians and vehicles, affecting the normal operation of the bridge.

[0003] In the chemical, thermal power and other industries, due to the parameter changes of the working fluids running in the steam and water pipelines and the increasing complexity of the thermal system, some pipelines suffer severe vibrations, threatening safe production.

[0004] Cables or pipes may vibrate significantly in any direction perpendicular to their axis. At present, additional dampers are widely used to control the vibration of inclined cables or pipes. In some related technical solutions, built-in vibration damping rings are often used. Built-in vibration damping rings are mainly rubber structures, and their vibration damping performance is limited.

[0005] In some other related technologies, a smaller viscous damper is used. This built-in damping and vibration reduction method is a better solution. However, it cannot guarantee a good damping and vibration reduction effect in any direction of the cable or pipe. Summary of the invention

[0006] The embodiment of the present application provides a built-in damping vibration reduction device to solve the problem of limited vibration reduction performance of the built-in vibration reduction ring in the related art.

[0007] The embodiment of the present application provides a built-in damping vibration reduction device, which includes:

[0008] A connecting cylinder having a placement area therein for placing a clamp for clamping a vibration reduction target;

[0009] A damping group is arranged in the connecting cylinder and includes two hydraulic dampers. The two hydraulic dampers of the damping group are symmetrically arranged on both sides of the placement area. The cylinders of the two hydraulic dampers included in the damping group are connected through a conduit, and the piston rods of the hydraulic dampers are used to resist the clamp.

[0010] In some embodiments, there are multiple damping groups, which are divided into part A and part B, and the line connecting the two hydraulic dampers included in the damping group belonging to part A is roughly perpendicular to the line connecting the two hydraulic dampers included in the damping group belonging to part B.

[0011] In some embodiments, the outer contour of the cross section of the clamp is a square structure, the inner contour is adapted to the outer wall of the vibration reduction target, and the piston rod of the hydraulic damper is used to abut against one of the outer walls of the clamp.

[0012] In some embodiments, a rolling structure is provided at the end of the piston rod, and the piston rod is rollingly connected to the clamp via the rolling structure.

[0013] In some embodiments, the rolling structure adopts a ball or a roller.

[0014] In some embodiments, the hydraulic damper further comprises a damping fluid filled in the cylinder, and a piston connected to the piston rod, wherein the piston is located in the cylinder and divides the cylinder into a rodless chamber and a rod chamber;

[0015] The rodless chambers of the two hydraulic dampers included in the damping group are communicated through a conduit, and the rod chambers of the two hydraulic dampers included in the damping group are communicated through another conduit.

[0016] In some embodiments, three-way valves are provided on the end covers at both ends of the cylinder, one end of the three-way valve is connected to the cylinder, the other end is connected to the conduit, and the remaining end is a one-way valve for injecting damping fluid into the cylinder.

[0017] In some embodiments, a regulating valve for controlling the connection or disconnection of cylinders of two hydraulic dampers included in the damping group is disposed on the conduit.

[0018] In some embodiments, a spiral rib is provided on the inner wall of the connecting tube, and the conduit is arranged on the rib; and / or,

[0019] The connecting tube comprises a lower flange and an upper flange which are connected to each other.

[0020] In some embodiments, a waterproof cover is also installed on the connecting tube; and / or,

[0021] The hydraulic damper is fixed in the connecting cylinder through a mounting bracket.

[0022] The beneficial effects of the technical solution provided by this application include:

[0023] The embodiment of the present application provides a built-in damping vibration reduction device, which realizes the interconnection of two opposing hydraulic dampers through a conduit, thereby realizing the hydraulic inertia between the two hydraulic dampers of the damping group. The hydraulic inertia is used to provide negative stiffness for the structure, which can greatly improve the structural vibration control effect.

[0024] By adjusting the positions of the two opposing hydraulic damper pistons to achieve natural tightening between the piston rod and the clamp, the connection gap can be eliminated, and the piston rod of the hydraulic damper can adaptively follow the movement of the structure, which can well adapt to the initial eccentricity during structural installation and the static displacement during loading.

[0025] All damping components are installed in two parts, part A and part B, which can adapt to the movement of the vibration reduction target in any direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic plan view of a built-in damping and vibration reduction device provided in an embodiment of the present application;

[0028] Figure 2 for Figure 1 Middle AA section view;

[0029] Figure 3 A schematic diagram of the connection of two hydraulic dampers included in the damping group provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the connection between the three-way valve and the end cover provided in an embodiment of the present application.

[0031] In the figure: 1. Connecting tube; 10. Lower flange; 11. Upper flange; 12. Rib; 2. Clamp; 3. Hydraulic damper; 30. Piston rod; 31. Rolling structure; 32. Cylinder; 33. Piston; 34. End cover; 35. Three-way valve; 350. Check valve; 36. Ear plate; 4. Conduit; 40. Regulating valve; 5. Steel conduit for inclined cable; 6. Waterproof cover; 7. Mounting bracket; 8. Vibration reduction target. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The embodiment of the present application provides a built-in damping vibration reduction device, which can solve the problem of limited vibration reduction performance of the built-in vibration reduction ring in the related art.

[0034] See also Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present application provides a built-in damping vibration reduction device, which includes a connecting tube 1 and a damping group. The connecting tube 1 has a placement area for placing a clamp 2. The clamp 2 clamps and fixes on a vibration reduction target 8. The vibration reduction target 8 can be a component that needs to be damped, such as a cable, a pipeline, etc. When the vibration reduction target 8 is a cable, the clamp 2 is a cable clamp. When the vibration reduction target 8 is a pipeline, the clamp 2 is a pipe clamp. The vibration reduction target 8 passes through the connecting tube 1. The damping group is arranged in the connecting tube 1. The damping group includes two hydraulic dampers 3. The two hydraulic dampers 3 of the damping group are symmetrically arranged on both sides of the placement area, and thus symmetrically arranged on both sides of the clamp 2. The cylinders 32 of the two hydraulic dampers 3 included in the damping group are connected through a conduit 4, and the piston rod 30 of the hydraulic damper 3 is used to resist the clamp 2.

[0035] The damping vibration reduction device provided in this embodiment realizes the interconnection of two opposite hydraulic dampers 3 through the conduit 4, thereby realizing the hydraulic inertia between the two hydraulic dampers 3 of the damping group, and utilizing the hydraulic inertia to provide negative stiffness for the structure, which can greatly improve the structural vibration control effect.

[0036] By adjusting the positions of the pistons of the two opposing hydraulic dampers 3 to achieve natural squeezing between the piston rod 30 and the clamp 2, the connection gap can be eliminated, and the piston rod of the hydraulic damper 3 can adaptively follow the movement of the structure, which can well adapt to the initial eccentricity during structural installation and the static displacement during loading.

[0037] According to actual conditions, during design, the diameter or length of the conduit 4 can be adjusted to conveniently adjust the required hydraulic inertia.

[0038] The damping vibration reduction device provided in this embodiment can adjust the orientations of the two hydraulic dampers 3 of the damping group according to actual requirements during installation to achieve the damping of in-plane vibration or the vibration of out-of-plane vibration.

[0039] The hydraulic damper 3 may be a viscous damper.

[0040] Since the cable or pipeline may vibrate significantly in any direction perpendicular to its axis, the designed damping and vibration reduction device needs to ensure good vibration reduction effect in any direction.

[0041] To this end, in some preferred embodiments, see Figure 1 As shown, there are multiple damping groups, which are divided into part A and part B. The connecting line of the two hydraulic dampers 3 included in the damping group belonging to part A is roughly perpendicular to the connecting line of the two hydraulic dampers 3 included in the damping group belonging to part B.

[0042] During installation, adjust the orientation of the two hydraulic dampers 3 of the damping group so that the damping group of part A can achieve one of the in-plane vibration reduction and the out-of-plane vibration reduction, and the damping group of part B can achieve the other of the in-plane vibration reduction and the out-of-plane vibration reduction.

[0043] For example, see Figure 1 As shown in the figure, there are two damping groups, one of which belongs to part A and the other belongs to part B. When the vibration reduction target 8 vibrates at any angle, the component momentum of the vibration reduction target 8 in the direction of the installation axis of the hydraulic damper 3 drives the piston rod 30 to reciprocate, providing inertial damping for the vibration reduction target 8, and the component momentum perpendicular to the direction of the installation axis of the hydraulic damper 3 can be released by moving the piston rod 30 on the clamp because the piston rod 30 and the clamp 2 are not fixed.

[0044] Therefore, in this embodiment, all damping components are installed in two parts, part A and part B, which can adapt to the movement of the vibration reduction target 8 in any direction.

[0045] See also Figure 1 As shown, in some preferred embodiments, the outer contour of the cross section of the clamp 2 is a square structure, and the inner contour is adapted to the outer wall of the vibration reduction target 8, so that the clamp 2 can fit and clamp the vibration reduction target 8 very well, and the piston rod 30 of the hydraulic damper 3 is used to support one of the outer walls of the clamp 2, and the outer contour of the cross section is square, which can allow the piston rod 30 to move freely on the end surface without falling off.

[0046] For example, when the vibration reduction target 8 is a cable or a pipe, the cross-sectional profile of the clamp 2 is an inner circle and outer square structure. For another example, for some special-shaped vibration reduction targets 8, if the inner side profile of the cross-sectional profile is a polygon, the inner side profile of the clamp 2 is also a polygon.

[0047] Alternatively, a vibration-damping pad may be provided between the jig 2 and the vibration-damping target 8 .

[0048] The clamp 2 is cut diagonally into two halves and connected by bolts.

[0049] See also Figure 1 , Figure 2 and Figure 3 As shown, in some preferred embodiments, a rolling structure 31 is provided at the end of the piston rod 30, and the piston rod 30 is rollingly connected to the clamp 2 through the rolling structure 31. The rolling structure 31 makes the piston rod 30 and the clamp 2 rollingly connected, which can reduce the friction between the piston rod 30 and the clamp 2.

[0050] In some preferred embodiments, the rolling structure 31 is a ball or a roller.

[0051] See also Figure 3 As shown, in some preferred embodiments, the hydraulic damper 3 further includes a damping fluid filled in the cylinder 32, and a piston 33 connected to the piston rod 30, the piston 33 is located in the cylinder 32, and divides the cylinder 32 into a rodless chamber and a rod chamber;

[0052] The rodless chambers of the two hydraulic dampers 3 included in the damping group are communicated through a conduit 4 , and the rod chambers of the two hydraulic dampers 3 included in the damping group are communicated through another conduit 4 .

[0053] The piston 33 is a closed piston. When the piston 33 reciprocates, the damping fluid in the rodless chambers of the two hydraulic dampers 3 included in the damping group circulates back and forth, and the same applies to the damping fluid in the rod chambers.

[0054] When in use, the rodless chamber, the rod chamber and the guide tube 4 of the cylinder 32 are preferably filled with damping fluid.

[0055] The hydraulic damper 3 of this embodiment adopts a single-rod structure, and can achieve a vibration reduction function that is superior to the traditional double-rod damper without the need for a complex adjustment air chamber. It has a simple structure and saves more space than the traditional double-rod damper.

[0056] See also Figure 3 and Figure 4 As shown, in some preferred embodiments, a three-way valve 35 is provided on the end covers 34 at both ends of the cylinder 32, one end of the three-way valve 35 is connected to the cylinder 32, the other end is connected to the conduit 4, and the remaining end is a one-way valve 350 for injecting damping fluid into the cylinder 32. The one-way valve 350 is also used to inject damping fluid into the conduit 4. In order to prevent the damping fluid from leaking out, a plug can also be provided on the one-way valve 350 for further sealing.

[0057] See also Figure 3 and Figure 4 As shown, in some preferred embodiments, a regulating valve 40 is provided on the conduit 4, and the regulating valve 40 can control the connection or disconnection of the cylinders 32 of the two hydraulic dampers 3 included in the damping group. By the on-off of the regulating valve 40, the hydraulic damper 3 and the clamp 2 are rigidly connected or damped.

[0058] For example, when the frequency analysis method is required to accurately measure the cable force, the regulating valve 40 blocks the damping fluid communication, and the hydraulic damper 3 becomes a rigid fulcrum with a clear position, which has little effect on the cable vibration except for reducing the cable vibration length. In this way, the interference of the hydraulic damper 3 on the cable force measurement can be easily eliminated by closing the regulating valve 40, and the cable force of the cable throughout its life cycle can be accurately obtained.

[0059] See also Figure 2 As shown, in some preferred embodiments, a spiral rib 12 is provided on the inner wall of the connecting tube 1, and the conduit 4 is arranged on the rib 12. By providing the rib 12, the conduit 4 is arranged on the rib 12, so as to hide and protect the conduit 4, and the structure is more compact.

[0060] In order to make full use of the space and arrange the conduit 4 reasonably, the three-way valve 35 of one damping group can be directed upwards, and the three-way valve 35 of the other damping group can be directed downwards, so that one damping group uses the upper space and the other damping group uses the lower space.

[0061] See also Figure 2 As shown, in some preferred embodiments, the connecting tube 1 includes a lower flange 10 and an upper flange 11 connected to each other. When applied to a stay cable, the lower flange 10 is used to be installed on the steel conduit 5 of the stay cable;

[0062] The upper flange 11 and the lower flange 10 can be welded or bolted.

[0063] A waterproof cover 6 is also installed on the connecting tube 1 . Specifically, the waterproof cover 6 is connected to the upper flange 11 .

[0064] The hydraulic damper 3 is fixed in the connecting tube 1 through the mounting bracket 7. Figure 2 and Figure 3 As shown, the hydraulic damper 3 is provided with an ear plate 36 , which is fixed to the mounting bracket 7 by bolts, and the mounting bracket 7 is welded to the upper surface of the lower flange 10 .

[0065] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A built-in damping vibration reduction device, characterized in that: It includes: A connecting cylinder (1) having a placement area therein for placing a clamp (2) for clamping a vibration reduction target (8); A damping group, which is arranged in the connecting cylinder (1) and comprises two hydraulic dampers (3), wherein the two hydraulic dampers (3) of the damping group are symmetrically arranged on both sides of the placement area, the cylinders (32) of the two hydraulic dampers (3) included in the damping group are connected through a conduit (4), and the piston rods (30) of the hydraulic dampers (3) are used to abut against the clamp (2); The hydraulic damper (3) further comprises a damping fluid filled in the cylinder (32), and a piston (33) connected to the piston rod (30), wherein the piston (33) is located in the cylinder (32) and divides the cylinder (32) into a rodless chamber and a rod chamber; The rodless chambers of the two hydraulic dampers (3) included in the damping group are connected via a conduit (4), and the rod chambers of the two hydraulic dampers (3) included in the damping group are connected via another conduit (4); Three-way valves (35) are provided on the end covers (34) at both ends of the cylinder (32), one end of the three-way valve (35) is connected to the cylinder (32), the other end is connected to the conduit (4), and the remaining end is a one-way valve (350) used to inject damping fluid into the cylinder (32).

2. The built-in damping vibration reduction device according to claim 1, characterized in that: The damping group has multiple parts, which are divided into part A and part B. The connecting line of the two hydraulic dampers (3) included in the damping group belonging to part A is roughly perpendicular to the connecting line of the two hydraulic dampers (3) included in the damping group belonging to part B.

3. The built-in damping vibration reduction device according to claim 1, characterized in that: The outer contour of the cross section of the clamp (2) is a square structure, and the inner contour is adapted to the outer wall of the vibration reduction target (8). The piston rod (30) of the hydraulic damper (3) is used to abut against one of the outer walls of the clamp (2).

4. The built-in damping vibration reduction device according to claim 1, characterized in that: The end of the piston rod (30) is provided with a rolling structure (31), and the piston rod (30) is rollingly connected to the clamp (2) via the rolling structure (31).

5. The built-in damping vibration reduction device according to claim 4, characterized in that: The rolling structure (31) adopts a ball or a roller.

6. The built-in damping vibration reduction device according to claim 1, characterized in that: The conduit (4) is provided with a regulating valve (40) for controlling the connection or disconnection of the cylinder barrels (32) of the two hydraulic dampers (3) included in the damping group.

7. The built-in damping vibration reduction device according to claim 1, characterized in that: The inner wall of the connecting tube (1) is provided with a spiral rib (12), and the conduit (4) is arranged on the rib (12); and / or, The connecting tube (1) comprises a lower flange (10) and an upper flange (11) which are connected to each other.

8. The built-in damping vibration reduction device according to claim 1, characterized in that: The connecting tube (1) is also provided with a waterproof cover (6); and / or, The hydraulic damper (3) is fixed in the connecting tube (1) via a mounting bracket (7).

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