Self-resetting viscous damper

Abstract

The invention discloses a self-resetting viscous damper, and relates to the field of earthquake resistance of building structures, the self-resetting viscous damper comprises an outer sleeve and a right oil cylinder slidably arranged in the outer sleeve, one end of the outer sleeve is slidably provided with a left oil cylinder abutting against one end of the right oil cylinder during compression, and a left piston head is movably arranged in the left oil cylinder; one end of the piston rod movably penetrates through the guide sleeve and the oil cylinder nut and is fixedly provided with a right small hole piston head in contact sealing with the inner wall of the right oil cylinder; the pressure cavity is filled with silicone oil which has pre-pressure and achieves resetting of the right small hole piston head. A positioning nut for driving the left piston head to move and adjusting the pressure of the silicone oil is arranged on the outer wall of the outer sleeve through threads. The device has the advantages of self-resetting function, efficient energy consumption, simple structure, small product appearance size and high reliability.

Description

Technical Field

[0001] This application relates to the field of seismic resistance of building structures, and particularly to a self-centering viscous damper. Background Art

[0002] Traditional viscous dampers are widely used in building structures and can effectively dissipate seismic energy and reduce structural vibration. However, traditional viscous dampers will produce large residual deformations during the energy dissipation process, resulting in difficulty for the structure to return to its original position after an earthquake and affecting the normal use of the building. Therefore, developing a viscous damper with a self-centering function (i.e., the product can return to its initial position after being stressed) has become an important research direction in the current seismic technology field.

[0003] Installing a spring inside an ordinary damper to achieve the self-centering function will increase the outer diameter and length of the product. Moreover, the greater the damping force, the larger the diameter of the required spring and the outer diameter of the spring, resulting in poor economic performance of the product. Summary of the Invention

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

[0005] The self-centering viscous damper provided by this application adopts the following technical solution: A self-centering viscous damper includes an outer sleeve and a right oil cylinder slidably arranged inside the outer sleeve. A guide sleeve is arranged inside one end of the right oil cylinder, and an oil cylinder nut for limiting the guide sleeve is fixedly arranged 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 during compression. A left piston head is movably arranged inside the left oil cylinder, and a left connecting rod that abuts against the surface of the left piston head during compression and under normal conditions is movably arranged at one end of the left oil cylinder. A piston rod fixedly connected to the left piston head is slidably arranged inside the left oil cylinder and the right oil cylinder. One end of the piston rod movably penetrates through the guide sleeve and the oil cylinder nut and is fixedly provided with a right small-hole piston head that contacts and seals with the inner wall of the right oil cylinder. Under normal conditions, the right small-hole piston head is adjacent 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 having a pre-pressure and for realizing the reset of the right small-hole piston head, and the silicone oil is set to be compressible. A positioning nut for driving the movement of the left piston head and adjusting the pressure of the silicone oil is threadedly arranged on the outer wall of the outer sleeve.

[0006] By adopting the above technical solution, during the vibration damping process of the device, the mutual movement between the right oil cylinder, the left oil cylinder and the outer sleeve, and the consumption of energy by the small-hole piston head in the silicone oil work to achieve the damping effect. At the same time, under the action of the pre-pressure and elastic force of the silicone oil, the damper can automatically reset, which is convenient for the next use. Since the right oil cylinder and the left oil cylinder are both arranged inside the outer sleeve, the volume and length of the device can be made smaller initially. This device has the advantages of self-resetting function, high energy consumption, simple structure, small product external dimensions and high reliability.

[0007] Preferably, limiting grooves are symmetrically opened at the overlapping part of the left oil cylinder and the outer sleeve. A pin shaft that slides in the limiting groove is fixedly penetrated through the left piston head, and both ends of the pin shaft extend to the outside of the outer sleeve.

[0008] By adopting the above technical solution, the sliding of the pin shaft inside the limiting 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 and consuming energy.

[0009] Preferably, a first guide ring that is in close contact with the inner wall of the right oil cylinder is arranged on the surface of the right small-hole piston head, and small round holes for the flow of silicone oil are circumferentially opened on the right small-hole piston head.

[0010] By adopting the above technical solution, the first guide ring has functions such as guiding, positioning, reducing friction and wear, assisting in sealing and preventing leakage, and bearing and pressure distribution, so that the right small-hole piston head works in the best state.

[0011] Preferably, a plurality of first sealing rings that are in contact and sealed with the inner wall of the right oil cylinder are embedded on the outer surface of the guide sleeve, and a second guide ring and a retaining ring that are in contact and sealed with the surface of the piston rod are respectively embedded on the inner ring surface of the guide sleeve.

[0012] By adopting the above technical solution, the first sealing rings mainly prevent the leakage of silicone oil. The function of the second guide ring is the same as that of the first guide ring. The retaining ring is mainly used to support the sealing ring and prevent the sealing ring from being extruded. A sealing ring can also be arranged on the retaining ring of this structure to further improve the sealing performance between the piston rod and the guide sleeve. The sealing structure of the guide sleeve can be set according to the actual situation, or existing technical solutions can also be adopted.

[0013] Preferably, a foot-shaped combined sealing ring and a tapered retaining ring for sealing the gap between the piston rod and the guide sleeve are respectively arranged from the inside to the outside in the notch between one end of the guide sleeve and the piston rod.

[0014] By adopting the above technical solutions, the foot-shaped combined sealing ring mainly plays a sealing role in the damper to prevent the leakage of damping oil or other media. It may be composed of multiple sealing elements combined, such as O-rings, Struthers seals, etc. These sealing elements form a reliable sealing barrier through specific arrangements and combinations. When the damper is working, the piston rod will reciprocate, and the foot-shaped combined sealing ring can ensure the sealing between the piston rod and the end cover to prevent the leakage of damping oil, thus ensuring the normal operation of the damper. The conical retaining ring mainly plays an axial fixing role in the damper and may also have certain sealing and supporting functions.

[0015] Preferably, the surface of the conical retaining ring is flush with the surface of the guide sleeve.

[0016] By adopting the above technical solutions, the flush surface can effectively avoid abnormal wear caused by the protrusion of the conical retaining ring, thereby improving the flatness of the surface of the guide sleeve.

[0017] Preferably, a number of through exhaust pipes are circumferentially provided on the side wall of the guide sleeve. One end of the guide sleeve is located inside the exhaust pipe and an oil plug is fixedly provided. The oil plug seals one end of the exhaust pipe through an oil seal.

[0018] By adopting the above technical solutions, for the exhaust pipes circumferentially provided on the side wall of the guide sleeve, when the piston rod reciprocates in the cylinder block, the damping oil in the cylinder may generate gas due to volume change, causing the gas to enter the interior of the exhaust pipe. Thus, the silicone oil can be smoothly compressed. The oil plug seals one end of the exhaust pipe through an oil seal, forming a double protection mechanism, which can block external pollutants such as dust and moisture from entering the cylinder block, avoid the pollution or emulsification of the damping oil, and extend the service life of the damper.

[0019] Preferably, an inner nut for the left connecting rod to pass through and be limited is fixedly provided at one end of the left oil cylinder.

[0020] By adopting the above technical solutions, the inner nut limits the left connecting rod to prevent the left connecting rod from moving out of the left oil cylinder, and at the same time is also convenient for disassembly and maintenance.

[0021] Preferably, under normal conditions, the positioning nut always abuts against the pin shaft, and the positioning nut pushes the left piston head, the piston rod, and the right small-hole piston head to move to adjust the silicone oil pressure inside the right oil cylinder, so that a pressure difference is generated between the silicone oils on both sides of the right small-hole piston head.

[0022] By adopting the above technical solutions, the positioning nut can push the pin shaft to move, and thus can adjust the pressure inside the silicone oil, which helps the right small-hole piston head to return to its original position to achieve the reset effect. The pressure of the silicone oil inside the right oil cylinder needs to change with the volume change of the damper itself, rather than being at a certain fixed value or interval value; When the positioning nut pushes the left piston head, the piston rod, and the right small-hole piston head to move and adjusts the silicone oil pressure inside the right oil 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 the silicone oil and the fact that the inside of the oil cylinder is a closed system, the silicone oil will flow naturally under the action of the pressure difference and tend to restore 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.

[0023] Preferably, a high-pressure gas reset mechanism for assisting the damper to reset is provided on the surface of the outer sleeve.

[0024] By adopting the above technical solution, when the silicone oil pressure inside the damper is abnormal and cannot be effectively reset, the high-pressure gas reset mechanism can be used for auxiliary reset to extend the service life of the damper and thus provide a better waiting period for spare parts during maintenance.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the piston rod drives the right small-hole piston head to move in the silicone oil, seismic or impact energy is dissipated. The right small-hole piston head squeezes the silicone oil in the pressure chamber with a large volume on one side into the pressure chamber with a small volume or squeezes the silicone oil in the pressure chamber with a small volume into the pressure chamber with a large volume, changing the internal pressure of the unilateral pressure chamber. Since there is a pre-pressure in the right oil cylinder at the initial position of the product and there is an elastic restoring force when the silicone oil is compressed, after the earthquake action 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 to drive the right small-hole piston head back to the initial position to achieve the self-resetting function; 2. With the help of the high-pressure gas reset mechanism, the effect of dissipating a part of seismic or impact energy can be achieved, increasing the damping effect. At the same time, when the silicone oil pressure is not enough to make the damper return to its original state when the damper is damaged, the high-pressure gas reset mechanism can assist the right small-hole piston head to reset. Therefore, in summary, this device has the advantages of self-resetting function, high energy consumption, simple structure, small product external dimensions, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall front view schematic diagram of the damper of the present application; Figure 2 is the overall front view sectional internal schematic diagram of the damper of the present application; Figure 3 is the connection schematic diagram of the piston rod, the right small-hole piston head, the right oil cylinder, and the guide sleeve of the present application; Figure 4 is the schematic diagram when the damper of the present application is compressed; Figure 5 is the connection schematic diagram of the high-pressure gas reset mechanism and the outer sleeve of the present application; Figure 6 Schematic diagram of the separation of the high-pressure sleeve and the side piston head of the present application.

[0027] Reference numerals: 1, left connecting rod; 2, inner nut; 3, left oil cylinder; 4, left piston head; 5, piston rod; 6, outer sleeve; 7, oil cylinder nut; 8, tapered retaining ring; 9, oil plug; 10, guide sleeve; 11, silicone oil; 12, positioning nut; 13, right oil cylinder; 14, guide ring one; 15, guide ring two; 16, sealing ring one; 17, retaining ring; 18, right small-hole piston head; 19, foot-shaped combined sealing ring; 20, oil seal; 21, pin shaft; 22, spherical rod joint bearing; 23, connecting seat; 24, limiting groove; 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 implementation manners

[0028] The following further elaborates on the present application in conjunction with the attached Figures 1 - 6 drawings.

[0029] The embodiment of the present application discloses a self-resetting viscous damper.

[0030] Embodiment 1 Referring to Figures 1 - 3 , a self-resetting viscous damper includes an outer sleeve 6 and a right oil cylinder 13 slidably disposed inside the outer sleeve 6. A connecting seat 23 is fixed at one end of the outer sleeve 6 away from the opening. A lubricating fluid 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 inside the opening at one end of the right oil cylinder 13. A plurality of sealing rings one 16 are embedded on both sides of the outer surface of the guide sleeve 10. The sealing rings one 16 are set as "O" - shaped, and the plurality of sealing rings one 16 are in contact with the inner wall of the right oil cylinder 13 for sealing. The middle perforation of the inner ring surface of the guide sleeve 10 is set as the inner ring surface. A guide ring two 15 is embedded on one side of the inner ring surface of the guide sleeve 10 and a retaining ring 17 is embedded on the other side. The inner walls of the guide ring two 15 and the retaining ring 17 are both in contact with the surface of the piston rod 5 for sealing. A notch is provided between one end of the guide sleeve 10 and the piston rod 5. Inside the notch, from the inside to the outside, there are respectively a foot-shaped combined sealing ring 19 for sealing the gap between the piston rod 5 and the guide sleeve 10 and a tapered retaining ring 8. The outer surface of the tapered retaining ring 8 is flush with the outer wall of the guide sleeve 10. A plurality of exhaust pipes are circumferentially provided on the side wall of the guide sleeve 10. The exhaust pipes are set as strip-shaped and penetrate through the guide sleeve 10 (as Figure 3As shown in the figure, an oil plug 9 is press-fitted at one end of the guide sleeve 10 located at the opening of the exhaust pipe. An oil seal 20 is abutted against the inner end of the oil plug 9 located inside the exhaust pipe. The oil seal 20 is thread-fixed to the exhaust pipe for sealing. An oil cylinder nut 7 is fixedly provided inside one end of the right oil cylinder 13. The oil cylinder nut 7 limits the guide sleeve 10 and one end of the oil cylinder nut 7 abuts against one end of the guide sleeve 10.

[0031] Among them, the oil seal 20 is set as a flat-head screw, the retaining ring 17 is made of polytetrafluoroethylene, and the first sealing ring 16 and the foot-shaped combined sealing ring 19 are both made of nitrile rubber.

[0032] The user first fills the silicone oil 11 to a specified position inside the right oil cylinder 13, and then inserts the guide sleeve 10 into the right oil cylinder 13 so that one end of the guide sleeve 10 contacts the silicone oil 11, and the first sealing ring 16 provided on the surface of the guide sleeve 10 is used for sealing to prevent the silicone oil 11 from leaking. The provided retaining ring 17, the second guide ring 15, the foot-shaped combined sealing ring 19 and the tapered retaining ring 8 are all used for sealing 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 accumulate and be compressed. The provided oil plug 9 and oil seal 20 can seal the exhaust pipe to prevent gas leakage, so that when the silicone oil 11 is not compressed, the pressure inside the right oil cylinder 13 can return to the original state, thereby achieving the effect of cyclic reset.

[0033] Refer to Figure 2 、 Figure 3 As shown in the figure, a 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 reach the maximum moving distance of the left oil cylinder 3. A left piston head 4 is movably provided in the upper middle part of the inner cavity of the left oil cylinder 3. The left piston head 4 is only set as a cylindrical shape and is not a conventional structure for a damper or a hydraulic rod. A left connecting rod 1 is movably provided at one end of the left oil cylinder 3. One end of the left connecting rod 1 abuts against the surface of the left piston head 4 when the damper is compressed or in the normal state, and a spherical rod end bearing 22 is fixedly provided at the end of the left connecting rod 1 away from the outer sleeve 6.

[0034] The connecting end of the spherical rod end bearing 22 is connected to the building. When damping, it will drive the left connecting rod 1 to move through the spherical rod end bearing 22. During this damping process, there will be two situations: First, the left connecting rod 1 will drive the left oil cylinder 3 to move away from the right oil cylinder 13, separating the left oil cylinder 3 from the right oil cylinder 13. At this time, the left connecting rod 1 and the left piston head 4 will separate; Second, the left connecting rod 1 will contact the left piston head 4 and push the left piston head 4 to move towards the right oil cylinder 13, thereby realizing the transmission of vibration and achieving the damping effect.

[0035] Refer to Figure 2 、 Figure 3, symmetrically arranged limit grooves 24 are provided at the overlapping parts of the side walls of the left oil cylinder 3 and the outer sleeve 6. Both ends of the limit groove 24 are semi-circular. The left piston head 4 is fixedly penetrated by a pin shaft 21, and both ends of the pin shaft 21 extend to the outside of the outer sleeve 6. The pin shaft 21 slides in the limit groove 24 and there is no gap at the surface contact part. The radius of the pin shaft 21 is the same as the radius of the semi-circular part at the end of the limit groove 24. The length of the limit groove 24 is less than the length of the left connecting rod 1 completely inserted into the left oil cylinder 3, thereby achieving the limiting effect. An internal nut 2 is fixedly threaded inside one end of the left oil cylinder 3. The left connecting rod 1 movably penetrates the internal nut 2, and the internal nut 2 limits the left connecting rod 1.

[0036] When the left connecting rod 1 moves, it will push the left piston head 4 to move, thereby driving the pin shaft 21 to slide in the limit groove 24, which can effectively prevent the left piston head 4 from rotating when moving. When the left oil cylinder 3 is moving, the limit groove 24 also slides on the surface of the pin shaft 21.

[0037] Refer to Figure 2 , Figure 3 , under normal conditions, the right small-hole piston head 18 is arranged on the side close to the guide sleeve 10 and divides the right oil cylinder 13 into two pressure chambers with different volumes. The pressure chambers are filled with silicone oil 11 with pre-pressure and for resetting the right small-hole piston head 18. The silicone oil 11 is set to be compressible. Under normal conditions, the positioning nut 12 always abuts against the pin shaft 21. The positioning nut 12 is threadedly arranged on the outer wall of the outer sleeve 6. The positioning nut 12 can drive the left piston head 4 to move through the pin shaft 21 and adjust the pressure of the silicone oil 11. Moreover, the positioning nut 12 pushes the left piston head 4, the piston rod 5, and the right small-hole piston head 18 to move to adjust the pressure of the silicone oil 11 inside the right oil cylinder 13, so as to generate a pressure difference between the silicone oil 11 on both sides of the right small-hole piston head 18. A piston rod 5 is slidably arranged inside the left oil cylinder 3 and the right oil cylinder 13. One end of the piston rod 5 is fixedly connected to the middle part of the left piston head 4 in the left oil cylinder 3. The other end of the piston rod 5 movably penetrates the guide sleeve 10 and the oil cylinder nut 7 and is fixedly provided with a right small-hole piston head 18. A first guide ring 14 that is in close contact with the inner wall of the right oil cylinder 13 is arranged on the surface of the right small-hole piston head 18. The first guide ring 14 and the seal arranged on the surface of the right small-hole piston head 18 are in contact with and seal the inner wall of the right oil cylinder 13. Small round holes for the flow of the silicone oil 11 are provided around the right small-hole piston head 18.

[0038] 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. Due to the viscous force of the silicone oil 11, the right oil cylinder 13 reciprocates within 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 seismic or impact energy. At the same time, the silicone oil 11 in the pressure chamber with a larger volume on one side is squeezed into the pressure chamber with a smaller volume through the small round hole of the right small-hole piston head 18, increasing the internal pressure of the pressure chamber with a smaller volume. Secondly, the silicone oil 11 in the pressure chamber with a larger volume is also compressed. Since there is pre-pressure silicone oil 11 and the elastic restoring force of the silicone oil 11 in the right oil cylinder 13 at the initial position of the product, after the seismic action 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 to drive the right small-hole piston head 18 back to the initial position to achieve the self-resetting function.

[0039] The resistance of the self-resetting viscous damper consists 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.

[0040] Both the second guide ring 15 and the first guide ring 14 are made of phenolic cloth with cloth.

[0041] It should be noted that the user can rotate the positioning nut 12 to push the pin shaft 21, and then drive the left piston head 4, the piston rod 5, and the right small-hole piston head 18 to move, so that the right small-hole piston head 18 can change its position inside the right oil cylinder 13 to adjust the pressure on the silicone oil 11, thereby realizing the adjustment of the pre-pressure of the silicone oil 11.

[0042] The implementation principle of a self-resetting viscous damper in an embodiment of this application is as follows: When an earthquake or impact occurs, the building structure or mechanical structure vibrates, and the spherical 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 within the outer sleeve 6 through the piston rod 5. At the same time, 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 seismic or impact energy. At the same time, the silicone oil 11 in the pressure chamber with a larger volume on one side is squeezed into the pressure chamber with a smaller volume through the small round hole of the right small-hole piston head 18, increasing the internal pressure of the pressure chamber with a smaller volume. Secondly, the silicone oil 11 in the pressure chamber with a larger volume is also compressed. Since there is pre-pressure silicone oil 11 and the elastic restoring force of the silicone oil 11 in the right oil cylinder 13 at the initial position of the product, after the seismic action 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 to drive the right small-hole piston head 18 back to the initial position to achieve the self-resetting function.

[0043] Specifically: 1. Compression condition: When the product is under pressure, the spherical rod joint bearing 22 and the left connecting rod 1 push the left piston head 4, the pin shaft 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 abuts against 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 (as Figure 4 shown).

[0044] 2. Tension condition: When the product is under tension, the spherical rod joint bearing 22 and the left connecting rod 1 pull the left oil cylinder 3 to move leftward inside the outer sleeve 6. The outer sleeve 6 will make one end of the limit groove 24 contact the pin shaft 21, and drive the pin shaft 21 and the piston rod 5 to drive the right small-hole piston head 18 to move rightward relative to the left oil cylinder 3, compressing the silicone oil 11 in the right oil cylinder 13.

[0045] This device has: 1. Self-resetting function: By setting the pre-pressure of the product, it can automatically return to the initial position after an earthquake or impact, reduce the residual deformation of the structure, and improve the seismic performance of the building structure and the anti-impact performance of the mechanical structure.

[0046] 2. High energy dissipation efficiency: The viscous fluid can effectively dissipate seismic energy or impact energy and reduce structural vibration. The resistance of the self-resetting damper is much greater than that of the ordinary damper.

[0047] 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.

[0048] 4. Small product dimensions: In the case of the same displacement, by arranging the left oil cylinder 3 and the right oil cylinder 13 inside the outer sleeve 6, the length of the self-resetting damper is about 1 / 2 of the length of the ordinary damper, which is convenient for installing building structures with size requirements.

[0049] 5. High reliability: The setting of the positioning nut 12 can effectively protect the damper and extend its service life.

[0050] Embodiment 2 Please refer to Figure 5 、 Figure 6, different from Embodiment 1 in that: a high-pressure gas reset mechanism 25 for assisting the damper to reset is provided on the surface of the outer sleeve 6. The high-pressure gas reset mechanism 25 includes a high-pressure tank 251 fixedly arranged on the surface of the outer sleeve 6 on the 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 fixedly arranged at the exhaust end of the high-pressure tank 251. A three-way high-pressure pipe 253 is fixed to the exhaust end of the gate valve 252. High-pressure sleeves 255 are fixed to both ports of the three-way high-pressure pipe 253. One-way valves 254 are fixedly arranged at one ends of the two high-pressure sleeves 255. The exhaust end of the one-way valve 254 is fixedly penetrated and communicated with 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 one-way valve 254 and accumulate. A side piston head 257 for compressing gas is movably arranged inside the high-pressure sleeve 255. A high-pressure rod 256 that is movably connected to one end of the pin shaft 21 is fixed in the middle of the side piston head 257.

[0051] When the pin shaft 21 moves, it will drive 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: 1. When squeezing the gas, the side piston head 257 will compress the gas inside the high-pressure sleeve 255 into the high-pressure tank 251 through the one-way valve 254, so that the high-pressure tank 251 has high-pressure gas inside.

[0052] 2. When the side piston head 257 moves in the reverse direction, due to the one-way ventilation of the one-way valve 254, a vacuum state will occur inside the high-pressure sleeve 255. At the same time, the resistance of the vacuum pumping can also enable the damper to consume energy, increasing the damping effect and the shock absorption effect.

[0053] When the right small-hole piston head 18 cannot effectively perform self-reset after 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 to push the side piston head 257 to move back to its original position, enabling the damper to regain the self-reset effect.

[0054] The gate valve 252 can also be an electric gate valve, and cooperate with an external power supply and a wireless control device, so that the gate valve 252 can be remotely controlled and used as an auxiliary before the damper is repaired, further improving the safety and redundancy effect of the device.

[0055] The one-way valve 254 is a product of Liangong Valve Group.

[0056] This device is used to improve the seismic performance and residual deformation of building structures under dynamic loads such as earthquakes.

[0057] The above are only alternative embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, various changes and modifications can be made to the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A self-resetting viscous damper, characterized in that: It includes 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 an oil cylinder nut (7) for limiting the guide sleeve (10) is fixedly arranged inside one end of the right oil cylinder (13); One end of the outer sleeve (6) is slidably provided with a left oil cylinder (3) which abuts against one end of the right oil cylinder (13) during compression. A left piston head (4) is movably arranged inside the left oil cylinder (3), and a left connecting rod (1) which abuts against the surface of the left piston head (4) during compression and under normal state is movably arranged at one end of the left oil cylinder (3). A piston rod (5) fixedly connected to the left piston head (4) is slidably arranged inside the left oil cylinder (3) and the right oil cylinder (13). One end of the piston rod (5) movably penetrates through the guide sleeve (10) and the oil cylinder nut (7) and is fixedly provided with a right small hole piston head (18) which is in contact and sealed with the inner wall of the right oil cylinder (13). Under normal state, 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 pressure chambers are filled with silicone oil (11) having a pre-pressure and for resetting the right small hole piston head (18), and the silicone oil (11) is set to be compressible. A positioning nut (12) for driving the left piston head (4) to move and adjusting the pressure of the silicone oil (11) is threadedly arranged on the outer wall of the outer sleeve (6).

2. The self-resetting viscous damper according to claim 1, wherein: Limiting grooves (24) are symmetrically opened at the overlapping part of the left oil cylinder (3) and the outer sleeve (6). A pin shaft (21) which slides in the limiting grooves (24) is fixedly penetrated through the left piston head (4), and both ends of the pin shaft (21) extend to the outside of the outer sleeve (6).

3. The self-resetting viscous damper according to claim 1, wherein: A first guide ring (14) which is in close contact with the inner wall of the right oil cylinder (13) is arranged on the surface of the right small hole piston head (18), and small round holes for the silicone oil (11) to flow through are circumferentially opened on the right small hole piston head (18).

4. The self-resetting viscous damper according to claim 1, wherein: A plurality of first sealing rings (16) which are in contact and sealed with the inner wall of the right oil cylinder (13) are embedded on the outer surface of the guide sleeve (10), and a second guide ring (15) and a retaining ring (17) which are in contact and sealed with the surface of the piston rod (5) are respectively embedded on the inner ring surface of the guide sleeve (10).

5. The self-resetting viscous damper according to claim 1, wherein: An angular combined seal ring (19) for sealing the gap between the piston rod (5) and the guide sleeve (10) and a tapered retaining ring (8) are respectively arranged inside the gap between one end of the guide sleeve (10) and the piston rod (5) from inside to outside.

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

7. The self-resetting viscous damper according to claim 5, characterized in that: A plurality of through exhaust pipes are circumferentially opened on the side wall of the guide sleeve (10). An oil plug (9) is fixedly arranged at one end inside the exhaust pipe at one end of the guide sleeve (10), and the oil plug (9) seals one end of the exhaust pipe through an oil seal (20).

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

9. The self-resetting viscous damper according to claim 8, wherein: Under normal conditions, the positioning nut (12) always abuts against the pin shaft (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 to adjust the pressure of the silicone oil (11) inside the right oil cylinder (13), so that a pressure difference is generated in the silicone oil (11) on both sides of the right small-hole piston head (18).

10. A self-resetting viscous damper according to claim 1, characterized in that: A high-pressure gas reset mechanism (25) for assisting the damper to reset is arranged on the surface of the outer sleeve (6).

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