Prestress viscous damper

Abstract

The utility model relates to the technical field of shock resistance, and discloses a prestress viscous damper which comprises a cylinder body, a first piston is connected inside the cylinder body in a sliding mode, a guide rod is fixedly connected inside the first piston, a second piston is fixedly connected outside the guide rod, and a fixing ring is fixedly connected outside the guide rod. The left sides of the fixing rings are fixedly connected with supporting rods, the supporting rods are sleeved with telescopic springs, the left sides of the multiple supporting rods are fixedly connected with moving rings, the multiple supporting rods are slidably connected with supporting rings, the outer portion of the cylinder body is fixedly connected with a cooling assembly, and the cooling assembly comprises a hollow ring. An inner cavity is formed in the hollow ring, and a heat conduction plate is fixedly connected to the outer portion of the hollow ring. According to the viscous damper, the prestress of the viscous damper is improved, then the displacement response of the structure is effectively restrained, and the risks of cracking of a building wall and damage to beam-column joints are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of earthquake resistance technology, and in particular to a prestressed viscous damper. Background Technology

[0002] Earthquake resistance primarily involves engineering structures and buildings, aiming to ensure the stability and safety of related objects under seismic loads. Prestressed viscous dampers dissipate seismic energy through the flow of internal viscous fluid during an earthquake, effectively reducing the vibration response of the structure, decreasing the displacement and acceleration of the building caused by the earthquake, preventing structural damage or even collapse due to severe vibrations, and ensuring the safety of people inside the building and the stability of the structure.

[0003] Prestressed viscous dampers are typically prestressed during installation. This makes the damper function like a component with initial stiffness within the structure, altering the overall stiffness distribution. For building structures with insufficient stiffness, especially high-rise buildings, the prestress of the damper can increase the lateral stiffness of the structure, improving its resistance to horizontal loads (such as seismic forces and wind forces). Taking a super high-rise office building as an example, a properly arranged prestressed viscous damper can effectively reduce the lateral displacement of the building under strong winds, preventing discomfort to occupants due to excessive lateral displacement, and also preventing fatigue damage caused by prolonged large deformation.

[0004] However, in existing technologies, some viscous dampers struggle to increase prestress. For super high-rise and long-span structures, strong winds are also a significant horizontal load. When prestressed viscous dampers cannot increase prestress, the structure cannot obtain sufficient additional stiffness and damping to resist wind-induced vibrations under strong winds. Taking long-span bridges as an example, wind can cause significant deflection and vibration. When the dampers cannot function effectively, the bridge's amplitude continuously increases, affecting not only traffic safety but also causing fatigue damage to critical bridge components such as cables and pier connections over a long period, thus reducing the bridge's service life. Therefore, a prestressed viscous damper is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a prestressed viscous damper, which aims to improve the problem that viscous dampers in the prior art are difficult to increase prestress.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A prestressed viscous damper includes a cylinder body, a piston 1 slidably connected inside the cylinder body, a guide rod fixedly connected inside the piston 1, a piston 2 fixedly connected outside the guide rod, a fixing ring fixedly connected outside the guide rod, a support rod fixedly connected to the left side of each fixing ring, a telescopic spring sleeved on the outside of each support rod, a movable ring fixedly connected to the left side of multiple support rods, a support ring slidably connected to the outside of multiple support rods, and a cooling component fixedly connected to the outside of the cylinder body.

[0008] The above technical solutions enable the damper to work synergistically in multiple aspects, including vibration energy dissipation, prestress adjustment, and temperature control.

[0009] As a further description of the above technical solution:

[0010] The cooling component includes a hollow ring with an inner cavity inside. A heat-conducting plate is fixedly connected to the outside of the hollow ring, and heat sinks are fixedly connected to the outside of multiple heat-conducting plates. Support plates are fixedly connected to the left and right sides of the hollow ring, and flow guides are fixedly connected to the outside of multiple support plates.

[0011] The above technical solution enables the heat generated inside the damper due to viscous fluid friction to be quickly and efficiently dissipated into the surrounding environment, ensuring that the damper's performance does not degrade due to overheating during operation and maintaining its long-term stable operation.

[0012] As a further description of the above technical solution:

[0013] The piston 2 is externally slidably connected to the inner wall of the cylinder, and the support ring is externally fixedly connected to the inner wall of the cylinder.

[0014] The above technical solution involves fixing the support ring to the inner wall of the cylinder, providing a stable and reliable support foundation for the prestress adjustment components such as the support rod and telescopic spring connected to it, thus ensuring that the prestress adjustment system can work stably during structural vibration.

[0015] As a further description of the above technical solution:

[0016] An end cap is detachably connected to the inside of the left side of the cylinder, and multiple heat sinks are externally fixedly connected to the inside of the flow guide.

[0017] The above technical solution achieves a tight and stable connection between the two, ensuring that the air guide can accurately guide the airflow across the surface of the heat sink, maximizing the heat dissipation efficiency of the heat sink, improving the heat dissipation efficiency of the entire cooling component, and ensuring the thermal stability of the damper.

[0018] As a further description of the above technical solution:

[0019] The inner cavity is filled with cooling water, and the inside of the movable ring is fixedly connected to the outside of the guide rod;

[0020] The above technical solution enables the moving ring to move synchronously with the guide rod when the structure vibrates, thereby effectively compressing or stretching the telescopic spring sleeved on the support rod.

[0021] As a further description of the above technical solution:

[0022] The guide rod is externally slidably connected to the inside of the end cap;

[0023] The above technical solution ensures that when the guide rod drives the piston and fixed ring, the movement of these components remains on a precise trajectory, thereby guaranteeing the reliability and stability of the entire damper during operation and improving the accuracy of its energy dissipation, vibration reduction, and prestress adjustment.

[0024] As a further description of the above technical solution:

[0025] The right side of the plurality of telescopic springs is fixedly connected to the left side of the support ring, and the left side of the plurality of telescopic springs is fixedly connected to the right side of the movable ring.

[0026] The above technical solutions enable effective responses to structural vibrations under different working conditions, improving the adaptability and vibration reduction effect of dampers.

[0027] As a further description of the above technical solution: the interior of the inner cavity is provided with cooling water, and the outside of the guide rod is in contact with the inside of the end cap;

[0028] Through the above technical solution, the cooling water in the inner cavity, with its excellent thermal conductivity, constructs an efficient heat transfer path, continuously removing a large amount of heat generated by the viscous fluid due to the damping effect, ensuring that the damper's operating temperature is always maintained within a reasonable range, avoiding the deterioration of the viscous fluid performance due to overheating, effectively suppressing radial sway and axial movement during the guide rod's movement, and ensuring the smooth operation of the piston assembly.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, the piston drives the guide rod to move, and the fixed ring fixed on the guide rod moves accordingly. The moving ring is pushed by the support rod, and the moving ring compresses the telescopic spring, thereby increasing the prestress of the viscous damper. This effectively suppresses the structural displacement response, greatly reducing the risk of wall cracking and beam-column joint failure. Even in the event of a high-intensity earthquake, the structure can maintain basic stability thanks to the additional support provided by the prestress of the damper, greatly ensuring the safety of people inside the building and avoiding the devastating disaster caused by the collapse of the entire building.

[0031] 2. In this utility model, the heat-conducting plate outside the hollow ring will further conduct the heat absorbed by the hollow ring to the heat sink. The heat sink has a large surface area, which can increase the contact area with the surrounding air and accelerate the dissipation of heat into the air. At the same time, the flow guide supported by the support plate can guide the flow of the surrounding air and form an airflow channel, which realizes the heat dissipation of the viscous damper. In turn, it can keep the internal temperature of the damper within a suitable range, ensure that the viscous fluid always maintains a stable viscosity, and ensure that the damper can output a stable damping force that meets the design expectations under various working conditions, and continuously and efficiently play the role of energy dissipation and vibration reduction. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of a prestressed viscous damper proposed in this utility model;

[0033] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0034] Figure 3 This is a schematic diagram of the shroud structure of a prestressed viscous damper proposed in this utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of the cylinder of a prestressed viscous damper proposed in this utility model;

[0036] Figure 5 for Figure 4 Enlarged view of point B in the image.

[0037] Legend:

[0038] 1. Cylinder block; 2. Piston 1; 3. Guide rod; 4. Piston 2; 5. Fixed ring; 6. Support rod; 7. Telescopic spring; 8. Moving ring; 9. Support ring; 10. End cap; 11. Hollow ring; 12. Inner cavity; 13. Heat sink; 14. Support plate; 15. Draft shield; 16. Heat conduction plate. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 4This utility model provides an embodiment of a prestressed viscous damper, comprising a cylinder 1. The cylinder 1 serves as the main outer shell of the entire damper and is made of high-strength metal, possessing excellent resistance to compression and deformation, providing a stable and reliable space for the movement of internal components. A piston 2 is tightly slidably connected inside the cylinder 1, and its material is a wear-resistant alloy with sufficient strength, ensuring it will not be easily damaged during long-term reciprocating motion. When external vibrations are transmitted to the structure connected to the damper, the vibration of the structure causes the cylinder 1 to move relative to the piston 2. Because the piston 2 and the guide rod 3 are firmly fixed together, the piston 2 can precisely drive the guide rod 3 to move synchronously during movement, ensuring the stability and accuracy of the entire motion transmission process.

[0041] The guide rod 3 is a key component connecting piston 2 and piston 4. Its material is specially selected to possess high strength and good toughness to withstand various stresses generated during the damper's operation. Piston 4 is securely fixed to the outside of the guide rod 3. The outer diameter of piston 4 is precisely designed to allow it to slide smoothly and tightly against the inner wall of cylinder 1. When the guide rod 3 is moved by piston 2, piston 4 also slides within cylinder 1. At this time, the viscous fluid filling cylinder 1, typically a highly viscous liquid such as silicone oil, generates viscous resistance to the movement of piston 4. The magnitude of this viscous resistance is closely related to the speed of piston 4; the faster piston 4 moves, the greater the resistance generated by the viscous fluid.

[0042] Reference Figure 4 and Figure 5A fixing ring 5 is fixedly connected to the outside of the guide rod 3. The fixing ring 5 is made of sturdy metal and is firmly and reliably connected to the guide rod 3. Multiple support rods 6 are evenly and firmly fixedly connected to the left side of the fixing ring 5. The support rods 6 are also made of high-strength metal and have good bending resistance. A telescopic spring 7 is sleeved on the outside of the support rod 6. The telescopic spring 7 is carefully set to be in a pre-stressed state of compression or tension in the initial state. A movable ring 8 is fixedly connected to the left side of multiple support rods 6. The movable ring 8 is tightly connected to the support rod 6 to ensure that it will not loosen during movement. At the same time, support rings 9 are also slidably connected to the outside of multiple support rods 6. The outside of the support rings 9 is fixedly connected to the inner wall of the cylinder body 1, providing stable support for the entire assembly. In the basic structure, when structural vibration causes piston 2 to move guide rod 3, the fixed ring 5 fixed on guide rod 3 also moves accordingly. The movement of fixed ring 5 pushes moving ring 8 through support rod 6. During the movement, moving ring 8 compresses or stretches telescopic spring 7. Due to the prestress of telescopic spring 7 and its deformation during structural vibration, an additional force is applied to the entire damper system. This additional force can effectively adjust the stiffness and damping characteristics of the damper. For example, during low-frequency vibration, the prestress of telescopic spring 7 can provide a certain stiffness to constrain the vibration of the structure; during high-frequency vibration, the deformation and reset of the spring can assist piston 4 in consuming energy more efficiently, thereby increasing the prestress of the viscous damper and effectively suppressing the structural displacement response.

[0043] Reference Figures 1 to 3 When the damper is working continuously, the viscous fluid inside generates a large amount of heat due to the high-speed sliding friction of the piston 4. This heat quickly causes the temperature of the cylinder 1 to rise. At this time, the hollow ring 11, which is fixedly connected to the outside of the cylinder 1, begins to function. The hollow ring 11 is made of a metal material with high thermal conductivity. It has an inner cavity 12, which is pre-filled with cooling water. Due to the principle of heat transfer, the heat of the cylinder 1 is quickly transferred to the hollow ring 11 through heat conduction, and then to the cooling water in the inner cavity 12. Water has a large specific heat capacity. This characteristic means that even when it absorbs a large amount of heat, its own temperature rise is relatively small. This effectively cools the cylinder 1 initially, alleviates the rapid temperature rise, and ensures that the internal temperature of the damper does not become too high and affect its performance.

[0044] A heat-conducting plate 16 is fixedly connected to the outside of the hollow ring 11. The heat-conducting plate 16 is made of a material with excellent thermal conductivity, which can quickly conduct the heat absorbed by the hollow ring 11 away. Heat sinks 13 are also fixedly connected to the outside of multiple heat-conducting plates 16. The heat sinks 13 are carefully designed and have a large surface area. They are typically made of lightweight metals with good thermal conductivity, such as aluminum alloy. By increasing the contact area with the surrounding air, according to the principle of heat exchange, the rate at which heat is dissipated into the air can be significantly accelerated, further reducing the overall temperature of the damper and maintaining the damper within a suitable operating temperature range.

[0045] Support plates 14 are fixedly connected to the left and right sides of the hollow ring 11. The support plates 14 serve to support and connect, ensuring the structural stability of the entire heat dissipation assembly. A guide shroud 15 is fixedly connected to the outside of multiple support plates 14. The guide shroud 15 adopts a streamlined design and is generally made of plastic or lightweight metal. The function of the guide shroud 15 is to guide the surrounding airflow and form an orderly airflow channel around the heat sink 13. For example, in a natural ventilation environment, the originally disordered airflow will flow more regularly and faster through the heat sink 13 under the guidance of the guide shroud 15. The fast-flowing air can carry away the heat dissipated by the heat sink 13 in time, greatly improving the heat dissipation efficiency, ensuring that the damper always works within a suitable temperature range, maintaining the stability of its performance, and ensuring that the damper can reliably play its energy dissipation and vibration reduction role under various working conditions.

[0046] Furthermore, an end cap 10 is detachably installed on the left side of the cylinder body 1. The material of the end cap 10 matches that of the cylinder body 1, and the detachable connection is achieved through bolts and other connecting parts. This design facilitates maintenance, repair, and component replacement within the damper. The inside of the moving ring 8 is firmly fixed to the outside of the guide rod 3, ensuring that the moving ring 8 can move stably with the guide rod 3 during structural vibration, effectively acting on the telescopic spring 7. The outside of the guide rod 3 is slidably connected to the inside of the end cap 10, ensuring smooth movement of the guide rod 3 while also providing guidance and constraint. Multiple telescopic springs 7 are fixedly connected to the left side of the support ring 9 on the right and to the right side of the moving ring 8 on the left. This connection method allows the telescopic springs 7 to stably perform their prestress adjustment function during structural vibration, providing a reliable guarantee for optimizing the damper's performance. Meanwhile, multiple heat sinks 13 are externally fixedly connected to the inside of the air guide shroud 15, ensuring a stable connection between the heat sinks 13 and the air guide shroud 15, so that the air guide shroud 15 can better guide the airflow through the heat sinks 13 and improve the heat dissipation effect.

[0047] Working principle: When external vibrations act on the structure connected to the prestressed viscous damper, as piston 2 4 slides in cylinder 1, the viscous fluid in cylinder 1 generates viscous resistance to the movement of piston 2 4. The viscous resistance is related to the movement speed of piston 2 4; the faster the speed, the greater the resistance. In the initial state, when the structure vibrates, piston 1 2 drives guide rod 3 to move, and the fixed ring 5 fixed on guide rod 3 moves accordingly. Through support rod 6, it pushes moving ring 8, and moving ring 8 compresses telescopic spring 7, thereby increasing the prestress of the viscous damper and effectively suppressing the structural displacement response.

[0048] When the damper is working, the internal viscous fluid generates a large amount of heat due to friction, causing the temperature of cylinder 1 to rise. At this time, the cooling components begin to function. The heat from cylinder 1 is transferred to the hollow ring 11 through thermal conduction, and then to the cooling water in the inner cavity 12. Because water has a large specific heat capacity, it can absorb a large amount of heat while its own temperature rises relatively little, thus playing a preliminary cooling role. The heat-conducting plate 16 on the outside of the hollow ring 11 further conducts the heat absorbed by the hollow ring 11 to the heat sink 13. The heat sink 13 has a large surface area, which can increase the contact area with the surrounding air and accelerate the dissipation of heat into the air. At the same time, the air guide shroud 15 supported by the support plate 14 can guide the flow of surrounding air and form an airflow channel. For example, in a natural ventilation environment, the outside air will flow more quickly through the heat sink 13 under the guidance of the air guide shroud 15, carrying away heat and further improving the heat dissipation efficiency, ensuring that the damper operates within a suitable temperature range and maintaining its stable performance.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prestressed viscous damper, comprising a cylinder (1), characterized in that: The cylinder (1) is internally slidably connected to a piston (2), the piston (2) is internally fixedly connected to a guide rod (3), the guide rod (3) is externally fixedly connected to a piston (4), the guide rod (3) is externally fixedly connected to a fixing ring (5), the left side of the fixing ring (5) is fixedly connected to a support rod (6), the support rod (6) is externally sleeved with a telescopic spring (7), the left side of multiple support rods (6) is fixedly connected to a moving ring (8), the outside of multiple support rods (6) is slidably connected to a support ring (9), and the cylinder (1) is externally fixedly connected to a cooling component.

2. The prestressed viscous damper according to claim 1, characterized in that: The cooling component includes a hollow ring (11), with an inner cavity (12) inside the hollow ring (11). A heat-conducting plate (16) is fixedly connected to the outside of the hollow ring (11), and heat sinks (13) are fixedly connected to the outside of multiple heat-conducting plates (16). Support plates (14) are fixedly connected to the left and right sides of the hollow ring (11), and flow guides (15) are fixedly connected to the outside of multiple support plates (14).

3. A prestressed viscous damper according to claim 1, characterized in that: The piston (4) is externally slidably connected to the inner wall of the cylinder (1), and the support ring (9) is externally fixedly connected to the inner wall of the cylinder (1).

4. A prestressed viscous damper according to claim 2, characterized in that: An end cap (10) is detachably connected to the inside of the left side of the cylinder (1), and a plurality of heat sinks (13) are externally fixedly connected to the inside of the shroud (15).

5. A prestressed viscous damper according to claim 2, characterized in that: The inner cavity (12) is filled with cooling water, and the inside of the moving ring (8) is fixedly connected to the outside of the guide rod (3).

6. A prestressed viscous damper according to claim 4, characterized in that: The guide rod (3) is externally slidably connected to the inside of the end cap (10).

7. A prestressed viscous damper according to claim 1, characterized in that: The right side of the multiple telescopic springs (7) is fixedly connected to the left side of the support ring (9), and the left side of the multiple telescopic springs (7) is fixedly connected to the right side of the movable ring (8).

8. A prestressed viscous damper according to claim 4, characterized in that: The inner cavity (12) is filled with cooling water, and the outside of the guide rod (3) is in contact with the inside of the end cap (10).

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