A self-resetting viscous damper

Abstract

This application discloses a self-resetting viscous damper, which relates to the field of earthquake resistance for building structures. The damper comprises an outer sleeve and a right oil cylinder slidably disposed within the outer sleeve. A left oil cylinder is slidably disposed at one end of the outer sleeve, which abuts against one end of the right oil cylinder during compression. A left piston head is movably disposed within the left oil cylinder. One end of the piston rod movably passes through a guide sleeve and a cylinder nut and is fixed with a right small-hole piston head that contacts and seals the inner wall of the right oil cylinder. The pressure chamber is filled with silicone oil that has a pre-pressure and resets the right small-hole piston head. A positioning nut is threadedly disposed on the outer wall of the outer sleeve to drive the movement of the left piston head and adjust the silicone oil pressure. The damper has the advantages of self-resetting function, high energy consumption, simple structure, small product size, and high reliability.

Description

Technical Field

[0001] The present application relates to the field of earthquake resistance of building structures, and in particular to a self-resetting viscous damper. Background Art

[0002] Traditional viscous dampers are widely used in building structures, effectively dissipating seismic energy and reducing structural vibration. However, these dampers produce significant residual deformation during the energy dissipation process, making it difficult for the structure to return to its original position after an earthquake, thus hindering the normal use of the building. Therefore, the development of viscous dampers with self-resetting capabilities (i.e., products that return to their initial position after being subjected to force) has become an important research direction in seismic technology.

[0003] Adding a spring inside an ordinary damper to achieve the self-reset function will increase the outer diameter and length of the product. The greater the damping force, the larger the required spring diameter and spring outer diameter will be, which will lead to poor economic performance of the product. Summary of the Invention

[0004] In order to improve the problem of poor economic performance, the present application provides a self-resetting viscous damper.

[0005] The present application provides a self-resetting viscous damper adopting the following technical solution:

[0006] A self-resetting viscous damper comprises an outer sleeve and a right oil cylinder slidably arranged inside the outer sleeve, a guide sleeve being arranged inside one end of the right oil cylinder, and a cylinder nut for limiting the guide sleeve being fixed inside one end of the right oil cylinder; a left oil cylinder is slidably arranged at one end of the outer sleeve and abuts against one end of the right oil cylinder when compressed, a left piston head is movably arranged inside the left oil cylinder, and a left connecting rod is movably arranged at one end of the left oil cylinder and abuts against the surface of the left piston head when compressed and in normal state;

[0007] A piston rod fixedly connected to the left piston head is slidably provided inside the left and right oil cylinders, one end of the piston rod movably passes through the guide sleeve and the oil cylinder nut and is fixed with a right small-hole piston head in contact and sealing with the inner wall of the right oil cylinder;

[0008] Under normal conditions, the right small hole piston head is close to the guide sleeve and divides the right oil cylinder into two pressure chambers with different volumes. The pressure chambers are filled with silicone oil with pre-pressure and for resetting the right small hole piston head. The silicone oil is configured to be compressible.

[0009] The outer wall of the outer sleeve is threadedly provided with a positioning nut for driving the left piston head to move and adjust the silicone oil pressure.

[0010] By adopting the above technical solution, the damping effect is achieved during the vibration reduction process of the device through the mutual movement between the right cylinder, the left cylinder and the outer sleeve, and the small-hole piston head consuming energy in the silicone oil. At the same time, the damper can automatically reset under the action of the pre-pressure and elastic force of the silicone oil, which is convenient for next use. Since the right cylinder and the left cylinder are both arranged inside the outer sleeve, the volume and length of the device can be initially small. The device has the advantages of self-resetting function, high energy consumption, simple structure, small product size and high reliability.

[0011] Preferably, the overlapping portion of the left oil cylinder and the outer sleeve are symmetrically provided with limiting grooves, the left piston head is fixed with a pin that slides in the limiting groove, and both ends of the pin extend to the outside of the outer sleeve.

[0012] By adopting the above technical solution, the sliding of the pin shaft inside the limit groove can effectively prevent the left piston head from rotating. Secondly, the outer sleeve drives the pin shaft to move and then drives the small-hole piston head to move in the silicone oil to achieve the effect of compressing the silicone oil to consume energy.

[0013] Preferably, the surface of the right small-hole piston head is provided with a guide ring 1 which is in close contact with the inner wall of the right oil cylinder, and the right small-hole piston head is surrounded by small circular holes for silicone oil to flow.

[0014] By adopting the above technical solution, the guide ring has the functions of guiding, positioning, reducing friction and wear, auxiliary sealing and leakage prevention, bearing and pressure distribution, so as to make the right small hole piston head work in the best state.

[0015] Preferably, the outer surface of the guide sleeve is embedded with a plurality of sealing rings 1 that abut against and seal the inner wall of the right oil cylinder, and the inner ring surface of the guide sleeve is respectively embedded with a guide ring 2 and a retaining ring that abut against and seal the surface of the piston rod.

[0016] By adopting the above technical solution, the sealing ring 1 mainly prevents the leakage of silicone oil, the function of the guide ring 2 is the same as that of the guide ring 1, the retaining ring is mainly used to support the sealing ring and prevent the sealing ring from being squeezed out, and a sealing ring can also be provided on the retaining ring of this structure to further improve the sealing between the piston rod and the guide sleeve, and the sealing structure of the guide sleeve structure can be set according to actual conditions, or the existing technical solution can be adopted.

[0017] Preferably, a foot-shaped combined sealing ring and a conical retaining ring for sealing the gap between the piston rod and the guide sleeve are respectively provided from the inside to the outside in the gap between one end of the guide sleeve and the piston rod.

[0018] By adopting the above technical solution, the foot-shaped combined sealing ring in the damper primarily serves as a seal, preventing leakage of damping oil or other media. It may be composed of multiple sealing elements, such as O-rings and step seals, which are specifically arranged and combined to form a reliable sealing barrier. When the damper is operating, the piston rod reciprocates. The foot-shaped combined sealing ring ensures a tight seal between the piston rod and the end cap, preventing leakage of damping oil and thus ensuring the normal operation of the damper. The tapered retaining ring in the damper primarily serves as axial fixation and may also provide certain sealing and support functions.

[0019] Preferably, the surface of the tapered retaining ring is flush with the surface of the guide sleeve.

[0020] By adopting the above technical solution, the surface is flush, which can effectively avoid abnormal wear caused by the protrusion of the tapered retaining ring, thereby improving the flatness of the guide sleeve surface.

[0021] Preferably, the side wall of the guide sleeve is surrounded by a plurality of exhaust pipes passing through, one end of the guide sleeve is located inside the exhaust pipe and the other end is fixed with an oil plug, and the oil plug seals one end of the exhaust pipe through an oil seal.

[0022] By adopting the above technical solution, the exhaust pipe is opened around the side wall of the guide sleeve. When the piston rod reciprocates in the cylinder body, the damping oil in the cylinder may generate gas due to the volume change, causing the gas to enter the exhaust pipe, thereby allowing the silicone oil to be smoothly compressed. The oil plug seals one end of the exhaust pipe through the oil seal, forming a double protection mechanism, which can prevent external pollutants such as dust and moisture from entering the cylinder body, avoid contamination or emulsification of the damping oil, and extend the service life of the damper.

[0023] Preferably, an inner nut is fixed to one end of the left oil cylinder for the left connecting rod to pass through and achieve position limiting.

[0024] By adopting the above technical solution, the inner nut limits the left connecting rod to prevent it from moving out of the left oil cylinder, and it is also convenient for disassembly and maintenance.

[0025] Preferably, under normal conditions, the positioning nut is always in contact with the pin shaft, and the positioning nut pushes the left piston head, piston rod, and right small hole piston head to move and adjust the silicone oil pressure inside the right oil cylinder to generate a pressure difference between the silicone oil on both sides of the right small hole piston head.

[0026] By adopting the above technical solution, the positioning nut can push the pin to move, thereby adjusting the pressure inside the silicone oil, helping the right small hole piston head to return to its original position and achieve the reset effect. The pressure of the silicone oil inside the right cylinder needs to change with the volume of the damper itself, and is not a fixed value or range.

[0027] When the positioning nut pushes the left piston head, piston rod, and right small-hole piston head to move and adjust the silicone oil pressure inside the right cylinder, a pressure difference will be generated in the silicone oil on both sides of the right small-hole piston head; when the external force disappears, due to the fluidity of silicone oil and the fact that the inside of the cylinder is a closed system, the silicone oil will flow naturally under the action of the pressure difference and tend to restore the pressure balance. When the right small-hole piston head returns to its original position, the silicone oil pressure on both sides of it will return to the state before adjustment.

[0028] Preferably, the surface of the outer sleeve is provided with a high-pressure gas reset mechanism for assisting the damper in resetting.

[0029] By adopting the above technical solution, when the silicone oil pressure inside the damper becomes abnormal and cannot be effectively reset, the high-pressure gas reset mechanism can be used for auxiliary reset, thereby extending the service life of the damper and providing a better waiting period for parts for maintenance.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. The piston rod drives the right small-hole piston head to move in the silicone oil to dissipate earthquake or impact energy. The right small-hole piston head squeezes the silicone oil in the large pressure chamber on one side into the small pressure chamber, or squeezes the silicone oil in the small pressure chamber into the large pressure chamber, so that the internal pressure of the pressure chamber on one side changes. Because there is pre-pressure in the right oil cylinder at the initial position of the product, the silicone oil has elastic restoring force when it is compressed. When the earthquake effect ends, the reaction force of the silicone oil pre-pressure and the elastic restoring force of the silicone oil release elastic potential energy, pushing the piston rod and the right small-hole piston head back to the initial position, realizing the self-reset function.

[0032] 2. With the help of the high-pressure gas reset mechanism, a part of the earthquake or impact energy can be dissipated, thereby increasing the damping effect. At the same time, when the damper is damaged and the silicone oil pressure is insufficient to restore the damper to its original state, the high-pressure gas reset mechanism can assist in resetting the right small hole piston head. Therefore, in summary, this device has the advantages of self-resetting function, high energy consumption, simple structure, small product size and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic front view of the overall damper of the present application;

[0034] Figure 2 This is a schematic diagram of the overall front cross-section of the internal structure of the damper of the present application;

[0035] Figure 3 This is a schematic diagram of the connection between the piston rod, right small-hole piston head, right oil cylinder and guide sleeve of this application;

[0036] Figure 4 This is a schematic diagram of the damper of the present application during compression;

[0037] Figure 5 This is a schematic diagram of the connection between the high-pressure gas reset mechanism and the outer sleeve of the present application;

[0038] Figure 6 This is a schematic diagram of the separation of the high-pressure sleeve and the side piston head of this application.

[0039] Reference numerals: 1, left connecting rod; 2, inner nut; 3, left oil cylinder;

[0040] 4. Left piston head; 5. Piston rod; 6. Outer sleeve; 7. Cylinder nut; 8. Conical retaining ring; 9. Oil plug; 10. Guide sleeve; 11. Silicone oil; 12. Positioning nut; 13. Right cylinder; 14. Guide ring 1;

[0041] 15. Guide ring 2; 16. Seal ring 1; 17. Retaining ring; 18. Right small-hole piston head; 19. Foot-shaped combined seal ring; 20. Oil seal; 21. Pin; 22. Fisheye rod joint bearing; 23. Connecting seat; 24. Limit groove;

[0042] 25. High-pressure gas reset mechanism; 251. High-pressure tank; 252. Gate valve; 253. Three-way high-pressure pipe; 254. Check valve; 255. High-pressure sleeve; 256. High-pressure rod; 257. Side piston head. DETAILED DESCRIPTION

[0043] The following is combined with Figures 1-6 This application is described in further detail.

[0044] The embodiment of the present application discloses a self-resetting viscous damper.

[0045] Example 1

[0046] Reference Figure 1-Figure 3A self-resetting viscous damper comprises an outer sleeve 6 and a right oil cylinder 13 slidably arranged inside the outer sleeve 6. A connecting seat 23 is fixed to the end of the outer sleeve 6 away from the opening. A lubricating liquid is provided on the contact surface between the outer wall of the right oil cylinder 13 and the inner wall of the outer sleeve 6 to reduce friction. A guide sleeve 10 for sealing is inserted into the opening at one end of the right oil cylinder 13. Several sealing rings 16 are embedded on both sides of the outer surface of the guide sleeve 10. The sealing ring 16 is set in an "O" shape. Several sealing rings 16 abut against the inner wall of the right oil cylinder 13 for sealing. The middle part of the inner ring surface of the guide sleeve 10 is set as an inner hole. Annular surface, a guide ring 2 15 is embedded on one side of the inner annular surface of the guide sleeve 10, and a retaining ring 17 is embedded on the other side. The inner wall of the guide ring 2 15 and the inner wall of the retaining ring 17 are both sealed against the surface of the piston rod 5. A gap is provided between one end of the guide sleeve 10 and the piston rod 5. The inside of the gap is provided with a foot-shaped combined sealing ring 19 and a conical retaining ring 8 for sealing the gap between the piston rod 5 and the guide sleeve 10 from the inside to the outside. The outer surface of the conical retaining ring 8 is flush with the outer wall of the guide sleeve 10. A number of exhaust pipes are opened around the side wall of the guide sleeve 10. The exhaust pipe is provided in a strip shape and passes through the guide sleeve 10 (such as Figure 3 As shown in the figure, one end of the guide sleeve 10 is located at the opening at one end inside the exhaust pipe and is interference-fitted with an oil plug 9. The oil plug 9 is located at one end inside the exhaust pipe and is abutted against an oil seal 20. The oil seal 20 is fixed to the exhaust pipe thread and seals it. A cylinder nut 7 is fixed inside one end of the right cylinder 13. The cylinder nut 7 limits the guide sleeve 10 and one end of the cylinder nut 7 abuts against one end of the guide sleeve 10.

[0047] The oil seal 20 is configured as a slotted screw, the retaining ring 17 is configured as polytetrafluoroethylene, and the sealing ring 16 and the foot-shaped combined sealing ring 19 are both configured as nitrile rubber.

[0048] The user first fills the silicone oil 11 to the specified position inside the right cylinder 13, and then inserts the guide sleeve 10 into the right cylinder 13 and makes one end of the guide sleeve 10 contact the silicone oil 11, and seals through the sealing ring 16 set on the surface of the guide sleeve 10 to prevent the silicone oil 11 from leaking. The set retaining ring 17, guide ring 2 15, foot-shaped combined sealing ring 19 and conical retaining ring 8 are all used to seal the gap between the guide sleeve 10 and the piston rod 5 to prevent the silicone oil 11 from leaking. When the silicone oil 11 is compressed, the internal gas will enter the exhaust hole and gather and be compressed. The set oil plug 9 and oil seal 20 can seal the exhaust pipe to prevent gas leakage, so that the pressure inside the right cylinder 13 can be restored to its original state when the silicone oil 11 is not compressed, thereby achieving the effect of cycle reset.

[0049] Reference Figure 2 、 Figure 3A left oil cylinder 3 is slidably provided at one end of the outer sleeve 6. When the damper is compressed, one end of the left oil cylinder 3 abuts against one end of the right oil cylinder 13 to achieve the maximum moving distance of the left oil cylinder 3. A left piston head 4 is movably provided in the middle and upper part of the inner cavity of the left oil cylinder 3. The left piston head 4 is only set to a cylindrical shape and is not a conventional structure used for a damper or a hydraulic rod. A left connecting rod 1 is movably provided at one end of the left oil cylinder 3. When the damper is compressed or in normal state, one end of the left connecting rod 1 abuts against the surface of the left piston head 4, and a fisheye rod joint bearing 22 is fixed to the end of the left connecting rod 1 away from the outer sleeve 6.

[0050] The fisheye rod joint bearing 22 is connected to the connecting end of the building. When damping is performed, the left connecting rod 1 will be driven to move through the fisheye rod joint bearing 22. During this damping process, two situations will occur: First, the left connecting rod 1 will drive the left oil cylinder 3 to move toward the side away from the right oil cylinder 13, so that the left oil cylinder 3 is separated from the right oil cylinder 13. At this time, the left connecting rod 1 and the left piston head 4 will be separated; second, the left connecting rod 1 will contact the left piston head 4 and push the left piston head 4 to move toward the side of the right oil cylinder 13, thereby realizing the transmission of vibration and achieving the damping effect.

[0051] Reference Figure 2 、 Figure 3 The limiting grooves 24 are symmetrically provided at the overlapping parts of the side walls of the left cylinder 3 and the side walls of the outer sleeve 6. Both ends of the limiting grooves 24 are set to be semicircular. The left piston head 4 is fixed with a pin 21, and both ends of the pin 21 extend to the outside of the outer sleeve 6. The pin 21 slides in the limiting groove 24 and there is no gap in the surface contact part. The radius of the pin 21 is the same as the radius of the semicircular end of the limiting groove 24. The length of the limiting groove 24 is less than the length of the left connecting rod 1 fully inserted into the left cylinder 3 to achieve the limiting effect. An internal nut 2 is fixed with an internal thread at one end of the left cylinder 3. The left connecting rod 1 movably passes through the internal nut 2, and the internal nut 2 limits the left connecting rod 1.

[0052] When the left connecting rod 1 moves, it will push the left piston head 4 to move and then drive the pin shaft 21 to slide in the limiting groove 24, which can effectively prevent the left piston head 4 from rotating when moving. When the left oil cylinder 3 moves, it also causes the limiting groove 24 to slide on the surface of the pin shaft 21.

[0053] Reference Figure 2 、 Figure 3Under normal circumstances, the right small hole piston head 18 is arranged on the side adjacent to the guide sleeve 10 and divides the right oil cylinder 13 into two pressure chambers with different volumes. The pressure chamber is filled with silicone oil 11 with pre-pressure and for realizing the reset of the right small hole piston head 18. The silicone oil 11 is set to be compressible. Under normal circumstances, the positioning nut 12 is always in contact with the pin 21. The outer wall of the outer sleeve 6 is threaded with a positioning nut 12. The positioning nut 12 can drive the left piston head 4 to move and adjust the pressure of the silicone oil 11 through the pin 21, and the positioning nut 12 pushes the left piston head 4, the piston rod 5, and the right small hole piston head 18 to move and adjust the silicone oil inside the right oil cylinder 13 The pressure of 11 causes a pressure difference in the silicone oil 11 on both sides of the right small-hole piston head 18; a piston rod 5 is slidingly provided inside the left cylinder 3 and the right cylinder 13, and the piston rod 5 is located at one end of the left cylinder 3 and fixedly connected to the middle of the left piston head 4. The other end of the piston rod 5 movably passes through the guide sleeve 10 and the cylinder nut 7 and is fixed with the right small-hole piston head 18. The surface of the right small-hole piston head 18 is provided with a guide ring 14 that is tightly attached to the inner wall of the right cylinder 13. The guide ring 14 and the seal provided on the surface of the right small-hole piston head 18 are in contact with and sealed against the inner wall of the right cylinder 13, and a small circular hole for the silicone oil 11 to flow is opened around the right small-hole piston head 18.

[0054] The left connecting rod 1 drives the left piston head 4 to move and then drives the right small-hole piston head 18 through the piston rod 5. The viscosity of the silicone oil 11 makes the right oil cylinder 13 reciprocate in the outer sleeve 6. When the piston rod 5 drives the right small-hole piston head 18 to move in the viscous fluid silicone oil 11, a damping force is generated to dissipate the earthquake or impact energy. At the same time, the silicone oil 11 with a large volume in the pressure chamber on one side is squeezed into the inside of the pressure chamber with a small volume through the small circular hole of the right small-hole piston head 18, so that the pressure inside the small-volume pressure chamber increases, and secondly, the silicone oil 11 in the large-volume pressure chamber is also compressed; because in the initial position of the product, there is pre-stressed silicone oil 11 and elastic restoring force of silicone oil 11 in the right oil cylinder 13. When the earthquake action ends, the reaction force of the pre-stress of silicone oil 11 and the elastic restoring force of silicone oil 11 release elastic potential energy, pushing the piston rod 5 with the right small-hole piston head 18 back to the initial position, realizing the self-resetting function.

[0055] The resistance of the self-resetting viscous damper is composed of four parts: the pre-pressure of the silicone oil 11, the elastic restoring force of the silicone oil 11, the friction force of the sealing ring and the viscous damping force of the silicone oil 11.

[0056] The second guide ring 15 and the first guide ring 14 are both configured to be made of phenolic cloth.

[0057] It should be noted that the user can rotate the positioning nut 12 to push the pin 21 and then move through the left piston head 4, the piston rod 5 and the right small-hole piston head 18, so that the right small-hole piston head 18 can change its position inside the right cylinder 13 and adjust the pressure on the silicone oil 11, thereby realizing the adjustment of the pre-pressure of the silicone oil 11.

[0058] The implementation principle of a self-resetting viscous damper in the embodiment of the present application is as follows: when an earthquake or impact occurs, the building structure or mechanical structure vibrates, the fisheye rod joint bearing 22 drives the left connecting rod 1 and the left piston head 4 to move, and then drives the right small hole piston head 18 and the right oil cylinder 13 to reciprocate in the outer sleeve 6 through the piston rod 5. At the same time, the piston rod 5 also drives the right small hole piston head 18 to move in the viscous fluid silicone oil 11, thereby generating a damping force to dissipate the earthquake or impact energy. At the same time, the small circle of the right small hole piston head 18 The hole squeezes the silicone oil 11 in the pressure chamber with a large volume on one side into the pressure chamber with a small volume, thereby increasing the internal pressure of the pressure chamber with a small volume, and secondly compresses the silicone oil 11 in the pressure chamber with a large volume; because in the initial position of the product, there is pre-stressed silicone oil 11 and elastic restoring force of silicone oil 11 in the right oil cylinder 13. When the earthquake action ends, the reaction force of the pre-stressed silicone oil 11 and the elastic restoring force of silicone oil 11 release elastic potential energy, pushing the piston rod 5 with the right small hole piston head 18 back to the initial position, thereby realizing the self-resetting function.

[0059] Specifically:

[0060] 1. Compression working condition: When the product is under pressure, the fisheye rod joint bearing 22 and the left connecting rod 1 push the left piston head 4, the pin 21, and the piston rod 5 to drive the right small hole piston head 18 to move rightward relative to the outer sleeve 6. At this time, the right oil cylinder 13 contacts the bottom of the outer sleeve 6, and the right small hole piston head 18 compresses the silicone oil 11 in the right oil cylinder 13 (such as Figure 4 shown).

[0061] 2. Tensile working condition: When the product is subjected to tension, the fisheye rod joint bearing 22 and the left connecting rod 1 pull the left cylinder 3 to move to the left inside the outer sleeve 6. The outer sleeve 6 will make one end of the limit groove 24 contact the pin 21, and drive the pin 21 and the piston rod 5 to drive the right small hole piston head 18 to move to the right relative to the left cylinder 3, compressing the silicone oil 11 in the right cylinder 13.

[0062] This device has:

[0063] 1. Self-reset function: By setting the pre-stress of the product, it can automatically restore to its original position after an earthquake or impact, reducing residual deformation of the structure, and improving the seismic performance of the building structure and the impact resistance of the mechanical structure.

[0064] 2. Efficient energy dissipation: Viscous fluid can effectively dissipate seismic or impact energy, reducing structural vibration. The resistance of the self-resetting damper is much greater than that of ordinary dampers.

[0065] 3. Simple structure: This device has a simple structure, is easy to manufacture and install, and is suitable for various building structures and mechanical structures.

[0066] 4. Small product dimensions: Under the same displacement conditions, the left cylinder 3 and the right cylinder 13 are arranged in the outer sleeve 6, and the length of the self-resetting damper is about 1 / 2 of the length of an ordinary damper, which is convenient for installation in building structures with size requirements.

[0067] 5. High reliability: The setting of the positioning nut 12 can effectively protect the damper and extend its service life.

[0068] Example 2

[0069] Please refer to Figure 5 、 Figure 6 , the difference from Example 1 is that: a high-pressure gas reset mechanism 25 for assisting the damper reset is provided on the surface of the outer sleeve 6, and the high-pressure gas reset mechanism 25 includes a high-pressure tank 251 fixed on the surface of the outer sleeve 6 on one side of the right oil cylinder 13. The high-pressure tank 251 is made of high-pressure resistant metal material. A gate valve 252 is fixed at the exhaust end of the high-pressure tank 251, and a three-way high-pressure pipe 253 is fixed at the exhaust end of the gate valve 252. High-pressure sleeves 255 are fixed at both ends of the three-way high-pressure pipe 253. One end of the two high-pressure sleeves 255 is fixed with a check valve 254. The exhaust end of the check valve 254 is fixed and connected to one end of the high-pressure tank 251. The gas in the high-pressure sleeve 255 can enter the interior of the high-pressure tank 251 through the check valve 254 and gather. A side piston head 257 for compressed gas is movably provided inside the high-pressure sleeve 255, and a high-pressure rod 256 that is movable with one end of the pin shaft 21 is fixed to the middle part of the side piston head 257.

[0070] When the pin 21 moves, it drives the high-pressure rod 256 and the side piston head 257 to slide inside the high-pressure sleeve 255. The sliding is divided into two steps:

[0071] 1. When squeezing the gas, the side piston head 257 compresses the gas inside the high-pressure sleeve 255 into the high-pressure tank 251 through the check valve 254, so that the high-pressure tank 251 has high-pressure gas.

[0072] 2. When the side piston head 257 moves in the reverse direction, a vacuum state will appear inside the high-pressure sleeve 255 due to the one-way ventilation of the check valve 254. At the same time, the resistance of vacuuming can also make the damper realize energy consumption, thereby increasing the damping effect and shock absorption effect.

[0073] When the right small-hole piston head 18 cannot effectively reset itself due to long-term use or damage, the user only needs to select the gate valve 252 to connect the high-pressure tank 251 with the three-way high-pressure pipe 253, so that the internal compressed gas enters the high-pressure sleeve 255 and pushes the side piston head 257 to move back to its original position, so that the damper can regain the self-reset effect.

[0074] The gate valve 252 may also be an electric gate valve, and in conjunction with an external power supply and a wireless control device, the gate valve 252 can be remotely controlled for auxiliary use before the damper is repaired, further improving the safety and redundancy of the device.

[0075] The check valve 254 is a product of Lianggong Valve Group.

[0076] This device is used to improve the seismic performance and residual deformation of building structures under dynamic loads such as earthquakes.

[0077] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A self-resetting viscous damper, characterized in that: It comprises an outer sleeve (6) and a right oil cylinder (13) slidably arranged inside the outer sleeve (6), a guide sleeve (10) is arranged inside one end of the right oil cylinder (13), and a cylinder nut (7) for limiting the guide sleeve (10) is fixed inside one end of the right oil cylinder (13); a left oil cylinder (3) is slidably arranged at one end of the outer sleeve (6) and abuts against one end of the right oil cylinder (13) when compressed, a left piston head (4) is movably arranged inside the left oil cylinder (3), and a left connecting rod (1) is movably arranged at one end of the left oil cylinder (3) and abuts against the surface of the left piston head (4) when compressed and in normal state, and a plurality of exhaust pipes are opened around the side wall of the guide sleeve (10); A piston rod (5) fixedly connected to the left piston head (4) is slidably provided inside the left oil cylinder (3) and the right oil cylinder (13); one end of the piston rod (5) movably passes through the guide sleeve (10) and the oil cylinder nut (7) and is fixedly provided with a right small hole piston head (18) in contact and sealing with the inner wall of the right oil cylinder (13); The overlapping portion of the left oil cylinder (3) and the outer sleeve (6) is symmetrically provided with a limiting groove (24), and the left piston head (4) is fixed with a pin shaft (21) that slides in the limiting groove (24), and both ends of the pin shaft (21) extend to the outside of the outer sleeve (6); Under normal conditions, the right small hole piston head (18) is adjacent to the guide sleeve (10) and divides the right oil cylinder (13) into two pressure chambers with different volumes. The interior of the pressure chamber is filled with silicone oil (11) with pre-pressure and for realizing the reset of the right small hole piston head (18). The silicone oil (11) is set to be compressible, and the elastic restoring force of the silicone oil (11) exists. When the earthquake effect ends, the reaction force of the pre-pressure of the silicone oil (11) and the elastic restoring force of the silicone oil (11) release elastic potential energy, pushing the piston rod (5) and the right small hole piston head (18) back to the initial position; The outer wall of the outer sleeve (6) is provided with a threaded positioning nut (12) for driving the left piston head (4) to move and adjust the pressure of the silicone oil (11); The outer sleeve (6) is provided with a high-pressure gas reset mechanism (25) for assisting the damper reset. The high-pressure gas reset mechanism (25) includes a high-pressure tank (251) fixed on the outer sleeve (6) on the surface of one side of the right oil cylinder (13). The high-pressure tank (251) is made of a high-pressure resistant metal material. A gate valve (252) is fixed on the exhaust end of the high-pressure tank (251). A three-way high-pressure pipe (253) is fixed on the exhaust end of the gate valve (252). Both ends of the three-way high-pressure pipe (253) are fixed with high-pressure A sleeve (255) is provided at one end of the two high-pressure sleeves (255), a check valve (254) is fixed at one end of the check valve (254), and an exhaust end of the check valve (254) is fixedly connected to one end of the high-pressure tank (251). Gas in the high-pressure sleeve (255) can enter the interior of the high-pressure tank (251) through the check valve (254) and gather therein. A side piston head (257) for compressing gas is movably provided inside the high-pressure sleeve (255), and a high-pressure rod (256) that is movable with one end of the pin shaft (21) is fixed at the middle of the side piston head (257).

2. The self-resetting viscous damper according to claim 1, characterized in that: The surface of the right small hole piston head (18) is provided with a guide ring (14) that is in close contact with the inner wall of the right oil cylinder (13). The right small hole piston head (18) is surrounded by a small circular hole for the silicone oil (11) to flow.

3. The self-resetting viscous damper according to claim 1, characterized in that: The outer surface of the guide sleeve (10) is embedded with a plurality of sealing rings (16) that abut against the inner wall of the right oil cylinder (13) for sealing, and the inner ring surface of the guide sleeve (10) is respectively embedded with a guide ring (15) and a retaining ring (17) that abut against the surface of the piston rod (5) for sealing.

4. The self-resetting viscous damper according to claim 1, characterized in that: A foot-shaped combined sealing ring (19) and a conical retaining ring (8) for sealing the gap between the piston rod (5) and the guide sleeve (10) are respectively provided inside the gap between one end of the guide sleeve (10) and the piston rod (5) from the inside to the outside.

5. The self-resetting viscous damper according to claim 4, characterized in that: The surface of the tapered retaining ring (8) is flush with the surface of the guide sleeve (10).

6. The self-resetting viscous damper according to claim 5, characterized in that: The side wall of the guide sleeve (10) is surrounded by a plurality of exhaust pipes passing therethrough. One end of the guide sleeve (10) is located inside the exhaust pipe and the other end is fixed with an oil plug (9). The oil plug (9) seals one end of the exhaust pipe through an oil seal (20).

7. The self-resetting viscous damper according to claim 2, characterized in that: An inner nut (2) is fixedly provided at one end of the left oil cylinder (3) for the left connecting rod (1) to movably penetrate and achieve position limiting.

8. The self-resetting viscous damper according to claim 7, characterized in that: Under normal conditions, the positioning nut (12) is always in contact with the pin (21), and the positioning nut (12) pushes the left piston head (4), the piston rod (5), and the right small hole piston head (18) to move and adjust the pressure of the silicone oil (11) inside the right oil cylinder (13) so that the silicone oil (11) on both sides of the right small hole piston head (18) generates a pressure difference.

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