A damped adjustable stay cable oil damper and damping adjustment method

Abstract

This application relates to the technical field of bridge vibration control, and particularly relates to a damper-adjustable stay cable oil damper and a damper adjustment method, including: a damper main structure; an external damper adjustment structure, which includes an external cylinder, an external elbow pipe, a fixing plate, and a damper plug. One end of the external cylinder is closed, and the other end communicates with an oil chamber. The fixing plate is fixedly partitioned inside the external cylinder. One end of the external elbow pipe communicates with another oil chamber, and the other end communicates between the closed end of the external cylinder and the fixing plate. The fixing plate is provided with an eccentric flow hole. The damper plug can rotate and closely adhere to the fixing plate, and the damper plug is provided with more than four different specifications of damping holes. The damper plug is used to rotate and change the damping hole aligned with the flow hole. The stay cable oil damper and the damper adjustment method of this application add an external damper adjustment device on the basis of the traditional oil damper structure to achieve the function of adjustable damping.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge vibration control, and particularly relates to a damping adjustable stay cable oil damper and a damping adjustment method. Background Art

[0002] The stay cable oil damper is a key device for suppressing the vibration of stay cables in structures such as cable-stayed bridges. The stay cable oil damper consumes vibration energy through the flow resistance of hydraulic oil during the movement of the piston. When the stay cable vibrates under wind or vehicle loads, the piston rod drives the piston to reciprocate in the oil cylinder, and the hydraulic oil is forced to pass through a regulating valve or an orifice, generating a damping force related to the speed, thereby suppressing the vibration.

[0003] In related technologies, the traditional stay cable oil damper generates damping based on the thin-wall orifice throttling mechanism. Different damping orifices correspond to different damping coefficients, and the damping coefficient is adjusted by adjusting the size of the damping orifice. In actual engineering, different damping orifices need to be set according to the parameters of the stay cable to meet the requirements of the optimal damping coefficient. The damping coefficient is related to the vibration control order. Generally, the low-order damping coefficient is large, and the high-order damping coefficient is small.

[0004] However, in the traditional stay cable oil damper, one set of oil damper corresponds to one optimal damping coefficient, and it cannot meet the test vibration reduction requirements of multiple parameters. Summary of the Invention

[0005] The present application provides a damping adjustable stay cable oil damper and a damping adjustment method, which add an external damping adjustment structure on the basis of the traditional oil damper structure to realize adjustable damping.

[0006] In a first aspect, the present application discloses a damping adjustable stay cable oil damper, comprising:

[0007] A damper main body structure, which includes a main cylinder barrel and a main piston in a solid structure. The main piston divides the main cylinder barrel into two oil chambers;

[0008] An external damping adjustment structure, which includes an external cylinder barrel, an external elbow pipe, a fixing plate and a damping plug. One end of the external cylinder barrel is closed, and the other end is communicated with an oil chamber; the fixing plate is fixedly partitioned inside the external cylinder barrel. One end of the external elbow pipe is communicated with the other oil chamber, and the other end is communicated between the closed end of the external cylinder barrel and the fixing plate; the fixing plate is provided with an eccentric flow hole; the damping plug can rotate and closely adhere to the fixing plate, and the damping plug is provided with more than four different specifications of damping orifices; the damping plug is used for rotating and changing the damping orifice aligned with the flow hole.

[0009] In combination with the first aspect, in one embodiment, the stay cable oil damper further includes an adjusting rod, the adjusting rod penetrates through the closed end of the external cylinder, one end of the adjusting rod is vertically connected to the center of the damping plug, and the other end exposes from the closed end of the external cylinder. When the adjusting rod rotates, the damping plug rotates.

[0010] In combination with the first aspect, in one embodiment, the adjusting rod is provided with an adjusting rod step, and the adjusting rod step abuts against the inner side surface of the closed end of the external cylinder.

[0011] In combination with the first aspect, in one embodiment, the external damping adjustment structure further includes an inner end cover, the inner end cover is hermetically arranged at the end of the external cylinder, the adjusting rod penetrates through the center of the inner end cover, and the adjusting rod step abuts against the inner end surface of the inner end cover.

[0012] In combination with the first aspect, in one embodiment, the external damping adjustment structure further includes an outer end cover, the outer end cover is coaxially and closely arranged against the inner end cover, and the outer end cover is coaxially fixed to the end of the adjusting rod by an internal hexagonal screw; the outer end cover is provided with an internal hole, the internal hole accommodates a compression spring, and the end of the compression spring abuts against a steel ball; the inner end cover is provided with a plurality of steel ball positioning pits on the contact surface between itself and the outer end cover, and the steel ball positioning pits are used for accommodating part of the structure of the steel ball; when the outer end cover rotates relative to the inner end cover until the steel ball is stuck into any one of the steel ball positioning pits, one specification of damping holes of the damping plug is aligned with the flow-through hole.

[0013] In combination with the first aspect, in one embodiment, the damper main body structure further includes two main end covers, and the two main end covers are respectively fixed at both ends of the main cylinder; one end of the external cylinder connecting to the oil chamber is adjacent to one of the main end covers, and one end of the external elbow connecting to the oil chamber is adjacent to the other main end cover.

[0014] In combination with the first aspect, in one embodiment, the flow-through hole is larger than any specification of damping holes, and each specification of damping holes includes at least one damping hole; the eccentric radius of the center of the flow-through hole relative to the center of the fixing plate is equal to the eccentric radius of each damping hole relative to the center of the damping plug.

[0015] In combination with the first aspect, in one embodiment, the damper main body structure further includes a main piston rod, the main piston rod penetrates through the two main end covers, the main piston is fixedly sleeved on the main piston rod, and the main piston slides along the main cylinder between the two main end covers.

[0016] In combination with the first aspect, in one embodiment, the external cylinder is vertically fixed to the main cylinder.

[0017] In a second aspect, an embodiment of the present application provides a damping adjustment method based on the above-mentioned stayed cable oil damper, comprising the steps of:

[0018] Initially, a damping hole of a certain specification of the damping plug is aligned with the flow hole, the cable oil damper works with a certain damping coefficient, and the oil flows mutually between the two oil chambers through the external elbow and the external cylinder;

[0019] Rotate the damping plug, and align the damping hole of another specification of the damping plug with the flow hole. The cable oil damper works with another damping coefficient. The oil flows between the two oil chambers through the external elbow and the external cylinder.

[0020] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0021] 1. The oil damper of the inclined cable of the present application is different from the traditional technical scheme and has a unique structural design. The damping hole is no longer arranged on the main piston, but an additional external damping adjustment structure is arranged. The two oil chambers divided by the main piston of the main cylinder are connected by an external cylinder and an external bent pipe. A fixed plate with an eccentric flow hole is arranged inside the external cylinder, and a rotatable damping plug close to the fixed plate is also arranged. The damping plug is provided with more than four damping holes of different specifications. By rotating the damping plug, the damping holes of different specifications can be adjusted to align with the flow holes, thereby achieving the adjustment of the damping coefficient. The oil damper of the inclined cable can have different damping coefficients and can meet different damping coefficient requirements. It has a wide range of applications and strong practicality.

[0022] 2. The oil damper of the inclined cable of the present application, on the basis of the damping plug being close to the fixed plate, has an adjusting rod step that is close to the inner side of the closed end of the external cylinder, effectively preventing the damping plug from axial displacement, so that the damping plug is always closely attached to the fixed plate, and the oil can only flow through the flow hole and the damping hole, providing a structural basis for adjustable damping.

[0023] 3. The cable-stayed oil damper of the present application, the damper main structure also includes two main end covers, the two main end covers are respectively fixed to the two ends of the main cylinder, one end of the external cylinder connected to the oil chamber is adjacent to one of the main end covers, and one end of the external elbow connected to the oil chamber is adjacent to the other main end cover. This arrangement can make the movement stroke of the main piston as long as possible to achieve a good vibration reduction effect.

[0024] 4. The stay cable oil damper of the present application, wherein the flow-through hole is larger than any one specification of damping holes, and each specification of damping holes includes at least one damping hole; the eccentric radius of the center of the flow-through hole relative to the center of the fixed plate is equal to the eccentric radius of each damping hole relative to the center of the damping plug, which can facilitate the alignment of a specification of damping holes of the flow-through hole with the flow-through hole. The stay cable oil damper operates with one damping coefficient. Rotate the damping plug, and another specification of damping holes of the damping plug is aligned with the flow-through hole, and the stay cable oil damper operates with another damping coefficient. The oil fluid flows mutually between two oil cavities through the external bent pipe and the external cylinder barrel. The damping plug is provided with more than four different specifications of damping holes, and the stay cable oil damper operates with more than four damping coefficients. The stay cable oil damper meets different damping coefficient requirements, has a wide application range, and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Schematic diagram of the stay cable oil damper provided by the embodiment of the present application;

[0027] Figure 2 Schematic diagram of the external damping adjustment structure provided by the embodiment of the present application;

[0028] Figure 3 is Figure 2 the sectional view taken along A-A in

[0029] Figure 4 Schematic diagram of the fixed plate provided by the embodiment of the present application;

[0030] Figure 5 Schematic diagram of the damping plug provided by the embodiment of the present application;

[0031] In the figure: 1. Damper main body structure; 2. External damping adjustment structure; 11. First ear part; 12. Second ear part; 13. Main body end cover; 14. Main body cylinder barrel; 15. Main body piston rod; 16. Main body piston; 21. External cylinder barrel; 22. External bent pipe; 23. Fixed plate; 231. Flow-through hole; 24. Damping plug; 241. First damping hole; 242. Second damping hole; 243. Third damping hole; 244. Fourth damping hole; 25. Adjusting rod; 251. Adjusting rod step; 26. Inner end cover; 261. Steel ball positioning pit; 27. Handle rod; 28. Inner end cover; 29. Socket head cap screw; 31. Steel ball pressing spring; 32. Steel ball. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0033] This application provides a damping adjustable stay cable oil damper and a damping adjustment method. An external damping adjustment device is added on the basis of the traditional oil damper structure to realize the function of adjustable damping, so as to achieve the purpose that a set of stay cable oil dampers can meet different damping coefficients.

[0034] As Figures 1 to 4 shown, an embodiment of a damping adjustable stay cable oil damper is disclosed in this application. The stay cable oil damper includes a damper main structure 1 and an external damping adjustment structure 2.

[0035] Among them, the damper main structure 1 includes a main cylinder 14 and a main piston 16 with a solid structure. The main piston 16 divides the main cylinder 14 into two oil chambers. The main piston 16 has a solid structure and no damping holes are arranged. The oil does not flow through the damping holes of the main piston 16, but flows through the external damping adjustment structure 2.

[0036] The external damping adjustment structure 2 includes an external cylinder 21, an external elbow 22, a fixing plate 23 and a damping plug 24. One end of the external cylinder 21 is closed, and the other end is connected to an oil chamber. The fixing plate 23 is fixedly partitioned inside the external cylinder 21. One end of the external elbow 22 is connected to the other oil chamber, and the other end is connected between the closed end of the external cylinder 21 and the fixing plate 23. The fixing plate 32 is provided with an eccentric flow hole 231. The damping plug 24 can rotate and closely adhere to the fixing plate 32, and the damping plug 24 is provided with more than four groups of damping holes with different specifications. The damping plug 24 is used to rotate and change the damping holes aligned with the flow hole 231, from a group of damping holes aligned with the flow hole 231 to another group of damping holes aligned with the flow hole 231, so as to adjust the damping coefficient.

[0037] The cable-stayed cable oil damper of the present application is different from the traditional technical solution and has a unique structural design. The damping holes are no longer arranged on the main piston 16, but an additional external damping adjustment structure 2 is provided. The external cylinder 21 and the external elbow 22 are used in combination to span and connect the two oil chambers divided by the main piston 16 in the main cylinder 14. A fixing plate 32 with an eccentric flow hole 231 is arranged inside the external cylinder 21, and a rotatable damping plug 24 is also arranged close to the fixing plate 32. The damping plug 24 is provided with more than four different specifications of damping holes. By rotating the damping plug 24, different specifications of damping holes can be adjusted to align with the flow hole 231, thereby achieving the adjustment of the damping coefficient. The cable-stayed cable oil damper can have different damping coefficients, can meet different damping coefficient requirements, has a wide application range and strong practicability.

[0038] In one embodiment, the cable-stayed cable oil damper further includes an adjusting rod 25. The adjusting rod 25 penetrates the closed end of the external cylinder 21. One end of the adjusting rod 25 is vertically connected to the center of the damping plug 24, and the other end protrudes from the closed end of the external cylinder 21. When the adjusting rod 25 rotates, the damping plug 24 rotates. During specific operation, mainly by rotating the exposed end of the adjusting rod 25, the damping plug 24 is driven to rotate.

[0039] For the cable-stayed cable oil damper of the present application, the adjusting rod 25 penetrates the closed end of the external cylinder 21 and is vertically connected to the center of the damping plug 24, which is convenient for driving the damping plug 24 to rotate, thereby achieving the purpose of aligning different specifications of damping holes with the flow holes.

[0040] Furthermore, the adjusting rod 25 is provided with an adjusting rod step 251, and the adjusting rod step 251 abuts against the inner side surface of the closed end of the external cylinder 21.

[0041] For the cable-stayed cable oil damper of the present application, on the basis that the damping plug 24 abuts against the fixing plate 32, by the adjusting rod step 251 abutting against the inner side surface of the closed end of the external cylinder 21, the axial displacement of the damping plug 24 is effectively prevented, so that the damping plug 24 always closely fits the fixing plate 32, and the oil fluid can only flow through the flow hole and the damping hole, providing a structural basis for adjustable damping.

[0042] In one embodiment, the external damping adjustment structure 2 further includes an inner end cover 26. The inner end cover 26 is hermetically arranged at the end of the external cylinder 21 to form the closed end of the external cylinder 21. The adjusting rod 25 penetrates the center of the inner end cover 26. One end of the adjusting rod 25 protrudes relative to the inner end cover 26, and the adjusting rod 25 can rotate relative to the inner end cover 26. The adjusting rod step 251 abuts against the inner end surface of the inner end cover 26.

[0043] For the stay cable oil damper of the present application, the external damping adjustment structure 2 further includes an inner end cover 26. The inner end cover 26 is hermetically arranged at the end of the external cylinder 21 to form a closed end of the external cylinder 21. The adjusting rod 25 passes through the center of the inner end cover 26 to form a structure for stably adjusting the rotation of the damping plug 24.

[0044] In one embodiment, the external damping adjustment structure 2 further includes an outer end cover 28. The outer end cover 28 is coaxially and closely arranged against the inner end cover 26, and the outer end cover 28 is coaxially fixed to the end of the adjusting rod 25 by an inner hexagon screw 29. The axes of the inner end cover 26, the outer end cover 28 and the adjusting rod 25 are all coaxially arranged, and the outer end cover 28 surrounds the exposed end of the adjusting rod 25. The outer end cover 28 and the adjusting rod 25 are relatively fixed, and the outer end cover 28 can rotate relative to the inner end cover 26.

[0045] The outer end cover 28 is provided with an internal hole. The internal hole accommodates a compression spring 31. The end of the compression spring 31 abuts against a steel ball 32. The internal hole is eccentrically arranged, and the axes of the internal hole and the compression spring 31 are parallel to the axis of the outer end cover 28 itself. The compression spring 31 always presses against the steel ball 32 and presses the steel ball 32 towards the inner end cover 26.

[0046] The inner end cover 26 is provided with a plurality of steel ball positioning pits 261 on the contact surface with the outer end cover 28. The steel ball positioning pits 261 are used to accommodate part of the structure of the steel ball 32. Specifically, the number of the steel ball positioning pits 261 is equal to the number of specifications of the damping holes.

[0047] When the outer end cover 28 rotates relative to the inner end cover 26 until the steel ball 32 is stuck into any one of the steel ball positioning pits 261, one of the damping holes of the damping plug 24 is aligned with the flow hole 231.

[0048] Preferably, the external damping adjustment structure 2 is further provided with a handle rod 27. One end of the handle rod 27 is provided with a thread and is tightly connected to the side threaded hole of the outer end cover 28. The handle rod 27 can facilitate the application of force, facilitate driving the outer end cover 28 to rotate, and further drive the adjusting rod 25 to rotate.

[0049] The operator rotates the outer end cover 28, thereby driving the adjusting rod 25 and the corresponding damping plug 24 to rotate, so as to adjust the alignment of damping holes of different specifications with the flow holes, and further achieve the purpose of adjusting the damping coefficient. During this process, the steel ball 32 is pressed against by the compression spring 31 and rolls on the top surface of the inner end cover 26. When a damping hole of a certain specification on the damping plug 24 aligns with the flow hole 231 on the fixed plate 23, the steel ball 32 just moves to the steel ball positioning pit 261. Due to the fact that the steel ball 32 is continuously pressed against by the compression spring 31, the operator will hear a "click" sound, and at the same time, it is significantly more difficult to rotate the outer end cover 28, indicating that the operation of adjusting the damping coefficient has been successfully completed. Further, when it is necessary to adjust to another damping coefficient later, repeat the above operation, perform the same adjustment, and hear the "click" sound again, which means that another damping coefficient has been adjusted.

[0050] Specifically, the damping plug of this patent is provided with x different specifications of damping holes, the top surface of the end cover is provided with x steel ball positioning pits, and the stay cable oil damper works with x damping coefficients.

[0051] For the stay cable oil damper of the present application, by setting a fixed inner end cover 26 and a rotatable outer end cover 28, and arranging an internal hole, a compression spring 31 and a steel ball 32 on the outer end cover 28, and arranging a number of steel ball positioning pits 261 on the inner end cover 26. When the outer end cover 28 rotates relative to the inner end cover 26 and the steel ball 32 snaps into any one of the steel ball positioning pits 261, one of the damping holes of the damping plug 24 aligns with the flow hole 231. By rotating the outer end cover 28, the steel ball 32 can quickly and conveniently match each steel ball positioning pit 261, achieving the purpose of quickly switching the damping coefficient, greatly improving the accuracy of switching the damping coefficient, and improving the switching efficiency.

[0052] In one embodiment, the damper main structure 1 further includes two main end covers 13, and the two main end covers 13 are respectively fixed to both ends of the main cylinder barrel 14; one end of the external cylinder barrel 21 connecting the oil chamber is adjacent to one of the main end covers 13, and one end of the external bent pipe 22 connecting the oil chamber is adjacent to the other main end cover 13.

[0053] For the stay cable oil damper of the present application, the damper main structure 1 further includes two main end covers 13, the two main end covers 13 are respectively fixed to both ends of the main cylinder barrel 14, one end of the external cylinder barrel 21 connecting the oil chamber is adjacent to one of the main end covers 13, and one end of the external bent pipe 22 connecting the oil chamber is adjacent to the other main end cover 13. This setting can make the movement stroke of the main piston 16 as long as possible, achieving a good vibration damping effect.

[0054] In one embodiment, the flow-through hole 231 is larger than the damping holes of any specification, and each specification of damping hole includes at least one damping hole; the eccentric radius of the center of the flow-through hole 231 relative to the center of the fixing plate 23 is equal to the eccentric radius of each damping hole relative to the center of the damping plug 24.

[0055] Specifically, when each specification of damping hole includes at least one damping hole, all the damping holes are encompassed by the flow-through hole 231.

[0056] As Figure 5 shown, in one example, the damping plug 24 includes four different specifications of damping holes, namely a first damping hole 241, a second damping hole 242, a third damping hole 243, and a fourth damping hole 244.

[0057] For the stay cable oil damper of the present application, the flow-through hole 231 is larger than the damping holes of any specification, and each specification of damping hole includes at least one damping hole; the eccentric radius of the center of the flow-through hole 231 relative to the center of the fixing plate 23 is equal to the eccentric radius of each damping hole relative to the center of the damping plug 24, which can facilitate the rotational alignment of the flow-through hole 231 and the damping holes and provide a basis for adjusting the damping.

[0058] Furthermore, the damper main body structure 1 further includes a main body piston rod 15. The main body piston rod 15 penetrates through two main body end covers 13. The main body piston 16 is fixedly sleeved on the main body piston rod 15, and the main body piston 16 slides along the main body cylinder 14 between the two main body end covers 13.

[0059] In one embodiment, the external cylinder 21 is vertically fixed to the main body cylinder 14. In another embodiment, the external cylinder 21 can also be obliquely fixed to the main body cylinder 14.

[0060] Specifically, the damper main body structure 1 further includes a first ear 11 and a second ear 12. One end of the first ear 11 is fixed to the bottom end of the stay cable, and the second ear 12 is fixed to the bridge. When a relative displacement occurs between the bottom end of the stay cable and the bridge, the stay cable oil damper starts to work.

[0061] In a second aspect, the present application discloses a damping adjustment method based on the above stay cable oil damper, which includes the steps of:

[0062] Initially, a damping hole of a certain specification of the damping plug 24 is aligned with the flow-through hole 231, and the stay cable oil damper works with a certain damping coefficient. The oil fluid flows between the two oil cavities through the external elbow 22 and the external cylinder 21.

[0063] Rotate the damping plug 24 so that another damping hole of a certain specification of the damping plug 24 is aligned with the flow-through hole 231, and the stay cable oil damper works with another damping coefficient. The oil fluid flows between the two oil cavities through the external elbow 22 and the external cylinder 21.

[0064] Adjustment method for the stay cable oil damper of the present application. Initially, a damping hole of a certain specification of the damping plug 24 is aligned with the flow-through hole 231, and the stay cable oil damper operates with a certain damping coefficient. Rotate the damping plug 24, and a damping hole of another specification of the damping plug 24 is aligned with the flow-through hole 231, and the stay cable oil damper operates with another damping coefficient. The oil fluid flows mutually between the two oil cavities through the external bent pipe 22 and the external cylinder barrel 21. The damping plug 24 is provided with more than four different specifications of damping holes, and the stay cable oil damper operates with more than four damping coefficients. The stay cable oil damper meets different damping coefficient requirements, has a wide application range, and strong practicability.

[0065] Regarding the damping adjustment method, in one embodiment, the stay cable oil damper further includes an adjustment rod 25. The adjustment rod 25 penetrates through the closed end of the external cylinder barrel 21 and is vertically connected to the center of the damping plug 24; when the adjustment rod 25 rotates, the damping plug 24 rotates.

[0066] For the damping adjustment method of the present application, the adjustment rod 25 penetrates through the closed end of the external cylinder barrel 21 and is vertically connected to the center of the damping plug 24, which is convenient for driving the damping plug 24 to rotate, so as to achieve the purpose of aligning damping holes of different specifications with the flow-through hole.

[0067] Regarding the damping adjustment method, further, the adjustment rod 25 is provided with an adjustment rod step 251, and the adjustment rod step 251 closely adheres to the inner side surface of the closed end of the external cylinder barrel 21.

[0068] For the damping adjustment method of the present application, on the basis that the damping plug 24 closely adheres to the fixed plate 32, by the adjustment rod step 251 closely adhering to the inner side surface of the closed end of the external cylinder barrel 21, the axial displacement of the damping plug 24 is effectively prevented, so that the damping plug 24 always closely adheres to the fixed plate 32, and the oil fluid can only flow through the flow-through hole and the damping hole, providing a structural basis for adjustable damping.

[0069] Regarding the damping adjustment method, in one embodiment, the external damping adjustment structure 2 further includes an inner end cover 26. The inner end cover 26 is hermetically arranged at the end of the external cylinder barrel 21 to form the closed end of the external cylinder barrel 21. The adjustment rod 25 penetrates through the center of the inner end cover 26, and the adjustment rod step 251 closely adheres to the inner end surface of the inner end cover 26.

[0070] For the damping adjustment method of the present application, the external damping adjustment structure 2 further includes an inner end cover 26. The inner end cover 26 is hermetically arranged at the end of the external cylinder barrel 21 to form the closed end of the external cylinder barrel 21. The adjustment rod 25 penetrates through the center of the inner end cover 26, forming a stable structure for adjusting the rotation of the damping plug 24.

[0071] Regarding the damping adjustment method, in one embodiment, the damper main structure 1 further includes two main end caps 13, and the two main end caps 13 are respectively fixed to both ends of the main cylinder barrel 14; one end of the external cylinder barrel 21 connected to the oil chamber is adjacent to one of the main end caps 13, and one end of the external elbow pipe 22 connected to the oil chamber is adjacent to the other main end cap 13.

[0072] For the damping adjustment method of the present application, the damper main structure 1 further includes two main end caps 13, and the two main end caps 13 are respectively fixed to both ends of the main cylinder barrel 14. One end of the external cylinder barrel 21 connected to the oil chamber is adjacent to one of the main end caps 13, and one end of the external elbow pipe 22 connected to the oil chamber is adjacent to the other main end cap 13. This setting can make the movement stroke of the main piston 16 as long as possible, achieving a good vibration damping effect.

[0073] Regarding the damping adjustment method, in one embodiment, the flow hole 231 is larger than any specification of damping hole, and each specification of damping hole includes at least one damping hole; the eccentric radius of the center of the flow hole 231 relative to the center of the fixing plate 23 is equal to the eccentric radius of each damping hole relative to the center of the damping plug 24.

[0074] Specifically, when each specification of damping hole includes at least one damping hole, all the damping holes are encompassed by the flow hole 231.

[0075] For the damping adjustment method of the present application, the flow hole 231 is larger than any specification of damping hole, and each specification of damping hole includes at least one damping hole; the eccentric radius of the center of the flow hole 231 relative to the center of the fixing plate 23 is equal to the eccentric radius of each damping hole relative to the center of the damping plug 24, which can facilitate the rotational alignment of the flow hole 231 and the damping hole, providing a basis for adjusting the damping.

[0076] Furthermore, the damper main structure 1 further includes a main piston rod 15. The main piston rod 15 penetrates through the two main end caps 13, and the main piston 16 is fixedly sleeved on the main piston rod 15. The main piston 16 slides along the main cylinder barrel 14 between the two main end caps 13.

[0077] In one embodiment, the external cylinder barrel 21 is vertically fixed to the main cylinder barrel 14. In another embodiment, the external cylinder barrel 21 can also be obliquely fixed to the main cylinder barrel 14.

[0078] Specifically, the damper main structure 1 further includes a first ear 11 and a second ear 12. One end of the first ear 11 is fixed to the bottom end of the stay cable, and the second ear 12 is fixed to the bridge. When there is a relative displacement between the bottom end of the stay cable and the bridge, the stay cable oil damper starts to work.

[0079] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside 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 specific circumstances.

[0080] It should be noted that in the present 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 actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0081] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious 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 these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A damping adjustable stay cable oil damper, characterized in that, Comprising: A damper main structure (1), which includes a main cylinder barrel (14) and a main piston (16) in a solid structure. The main piston (16) divides the main cylinder barrel (14) into two oil chambers; An external damping adjustment structure (2), which includes an external cylinder barrel (21), an external elbow pipe (22), a fixing plate (23) and a damping plug (24). One end of the external cylinder barrel (21) is closed, and the other end communicates with one oil chamber; The fixing plate (23) is fixedly partitioned inside the external cylinder barrel (21). One end of the external elbow pipe (22) communicates with the other oil chamber, and the other end communicates between the closed end of the external cylinder barrel (21) and the fixing plate (23); The fixing plate (32) is provided with an eccentric flow hole (231); The damping plug (24) can rotate and closely adhere to the fixing plate (32), and the damping plug (24) is provided with more than four different specifications of damping holes; The damping plug (24) is used to rotate and change the damping hole aligned with the flow hole (231); The stay cable oil damper further includes an adjusting rod (25). The adjusting rod (25) penetrates through the closed end of the external cylinder barrel (21). One end of the adjusting rod (25) is vertically connected to the center of the damping plug (24), and the other end exposes from the closed end of the external cylinder barrel (21). When the adjusting rod (25) rotates, the damping plug (24) rotates; The adjusting rod (25) is provided with an adjusting rod step (251), and the adjusting rod step (251) closely adheres to the inner side surface of the closed end of the external cylinder barrel (21).

2. The oil damper for a stay cable with adjustable damping according to claim 1, characterized in that: The external damping adjustment structure (2) further includes an inner end cover (26). The inner end cover (26) is hermetically arranged at the end of the external cylinder barrel (21). The adjusting rod (25) penetrates through the center of the inner end cover (26), and the adjusting rod step (251) closely adheres to the inner end surface of the inner end cover (26).

3. The oil damper for stay cables with adjustable damping according to claim 2, wherein: The external damping adjustment structure (2) further includes an outer end cover (28). The outer end cover (28) is coaxially and closely arranged on the inner end cover (26), and the outer end cover (28) is coaxially fixed to the end of the adjusting rod (25) by an inner hexagon screw (29); The outer end cover (28) is provided with an internal hole, and the internal hole accommodates a compression spring (31). The end of the compression spring (31) abuts against a steel ball (32); The inner end cover (26) is provided with a number of steel ball positioning pits (261) on the contact surface between itself and the outer end cover (28), and the steel ball positioning pits (261) are used to accommodate a part of the structure of the steel ball (32); When the outer end cover (28) rotates relative to the inner end cover (26) until the steel ball (32) is stuck in any one of the steel ball positioning pits (261), one of the specifications of the damping holes of the damping plug (24) is aligned with the flow hole (231).

4. The oil damper for stay cables with adjustable damping according to claim 1, wherein: The damper main structure (1) further includes two main end covers (13). The two main end covers (13) are respectively fixed to both ends of the main cylinder barrel (14); One end of the external cylinder barrel (21) connected to the oil chamber is adjacent to one of the main end covers (13), and one end of the external elbow pipe (22) connected to the oil chamber is adjacent to the other main end cover (13).

5. A damped adjustable stay cable oil damper according to claim 1, characterized in that: The flow-through hole (231) is larger than the damping holes of any specification, and each specification of damping hole includes at least one damping hole; the eccentricity radius of the center of the flow-through hole (231) relative to the center of the fixing plate (23) is equal to the eccentricity radius of each damping hole relative to the center of the damping plug (24).

6. The oil damper for stay cables with adjustable damping according to claim 4, characterized in that: The damper main body structure (1) further includes a main body piston rod (15), the main body piston rod (15) penetrates through two main body end covers (13), the main body piston (16) is fixedly sleeved on the main body piston rod (15), and the main body piston (16) slides along the main body cylinder (14) between the two main body end covers (13).

7. The oil damper for stay cables with adjustable damping according to claim 1, wherein: The external cylinder (21) is vertically fixed to the main body cylinder (14).

8. A damping adjustment method for the stay cable oil damper according to any one of claims 1 to 7, characterized in that, It includes the steps: Initially, a damping hole of a certain specification of the damping plug (24) is aligned with the flow-through hole (231), and the stay cable oil damper works with a certain damping coefficient, and the oil fluid flows mutually between the two oil cavities through the external elbow pipe (22) and the external cylinder (21). Rotate the damping plug (24), and another damping hole of the damping plug (24) is aligned with the flow-through hole (231), and the stay cable oil damper works with another damping coefficient, and the oil fluid flows mutually between the two oil cavities through the external elbow pipe (22) and the external cylinder (21).

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