Dual-order viscous damper with adjustable damping force
By designing an adjustable double-order viscous damper, the structure of the adjustment rod and the guide rod and the flow of silicone oil are used to achieve the output of multiple damping forces under different vibration magnitudes, solving the problem of unstable earthquake resistance due to fixed damping parameters in the prior art.
Patent Information
- Application Number
- CN202421647042.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing first-order viscous damper with a single output is fixed, which is difficult to meet the excellent seismic resistance of buildings at different magnitudes, especially in long-term small shocks or sudden large displacement and large shocks.
A double-order viscous damper with adjustable damping force is designed. Through the design of the adjustment rod and the guide rod, the double-order damping force output of the piston is realized, and the damping force is adjusted through the flow of silicone oil in the cavity.
It achieves the output of multiple damping forces under different magnitudes, enhancing the seismic resistance of the building, especially in long-term small earthquakes or sudden large displacement earthquakes.
Smart Images
Figure CN223034240U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building seismic isolation and vibration reduction, and particularly relates to a two-stage viscous damper with adjustable damping force. Background Art
[0002] Seismic isolation and vibration reduction technology reduces the damage of wind and earthquake to buildings and structures. As a passive energy dissipation and shock absorption product, the viscous damper has stable and reliable dissipation of seismic energy, weakens the wind force, reduces the damage to buildings, and improves the seismic performance of buildings. At present, the damping parameters of the first-order viscous damper with a single output are fixed. Under the same earthquake input frequency, the change range of the damping force is small, and it is difficult to meet the excellent seismic performance of buildings under minor earthquakes, moderate earthquakes, and major earthquakes. Especially, it is difficult to have stable performance under long-term minor earthquakes or sudden large-displacement major earthquakes. Summary of the Invention
[0003] The purpose of the utility model is to solve the problems existing in the prior art, and provide a two-stage viscous damper with adjustable damping force, which has two-stage damping force output, adjustable damping force size, and good seismic isolation and vibration reduction effect.
[0004] The technical solution adopted by the utility model is as follows:
[0005] A two-stage viscous damper with adjustable damping force, characterized in that it includes a cylinder barrel, a piston arranged in the cylinder barrel, a left guide sleeve and a right guide sleeve respectively fixed on the inner wall of the cylinder barrel on both sides of the piston, O-shaped sealing rings respectively arranged between the left guide sleeve, the right guide sleeve and the inner wall of the cylinder barrel, a first cavity formed by the piston and the left guide sleeve, a second cavity formed by the piston and the right guide sleeve, a guide rod respectively passing through the right guide sleeve, the piston and the left guide sleeve and fixed to the piston, Y-shaped sealing rings and Struthers seals respectively arranged on the contact surfaces of the guide rod with the left guide sleeve and the right guide sleeve, an adjusting rod and a guide rod respectively fixed at both ends on the left guide sleeve and the right guide sleeve, a static connector fixed at the rear end of the left guide sleeve and a rod end connector fixed at the end of the guide rod;
[0006] The adjusting rod is a stepped rod with a thin middle and thick ends. The first cavity and the second cavity are filled with silicone oil. The adjusting rod and the guide rod pass through the piston and can move in the piston. There are gaps for silicone oil to pass between the adjusting rod and the guide rod and the piston, and between the piston and the inner side surface of the cylinder barrel.
[0007] Further, two adjusting rods and two guide rods are provided, and they are alternately and evenly distributed through the cross-section of the piston.
[0008] Further, limit plates are respectively arranged on the inner side surfaces of the left guide sleeve and the right guide sleeve, and both ends of the adjusting rod and the guide rod are respectively fixed on the limit plates.
[0009] Further, a group of small holes are opened on the limit plates.
[0010] Furthermore, annular pressing plates are fixedly arranged on two cross-sections of the piston, and the adjusting rod and the guiding rod pass through the annular pressing plates and can move in the piston.
[0011] Furthermore, a wear-resistant ring is arranged between the guiding rod and the piston.
[0012] Furthermore, a threaded sleeve is internally threaded at the front end of the cylinder barrel to press the right guiding sleeve.
[0013] Furthermore, one end of the static connector is internally threaded with the cylinder barrel and the end presses the left guiding sleeve.
[0014] Furthermore, pin shafts holes are respectively formed on the static connector and the rod end connector.
[0015] Advantages of the utility model:
[0016] When the guiding rod of the utility model drives the piston to reciprocate, the gap between the adjusting rod and the piston can change from a large gap to a small gap, realizing double-stage damping force output; the lengths of the various sections of the stepped adjusting rod are determined by the design displacement of the double-stage viscous damper, and the diameters of the various sections are determined by the magnitude of the damping force, so that the magnitude of the damping force is adjustable; under the combined action of the guiding rod, the adjusting rod, the limiting plate and the wear-resistant ring, the piston reciprocates smoothly along the adjusting rod, and the vibration isolation effect is good. Description of the drawings
[0017] Figure 1 is a schematic structural diagram of the piston guiding rod of the utility model;
[0018] Figure 2 is a sectional view of the utility model along the length of the adjusting rod;
[0019] Figure 3 is a sectional view of the utility model along the length of the guiding rod;
[0020] Figure 4 is a schematic structural diagram of the limiting plate of the utility model;
[0021] Figure 5 is a schematic structural diagram of the adjusting rod of the utility model
[0022] Figure 6 is a schematic diagram of the utility model used on a shear wall. Specific embodiments
[0023] The content of the utility model will be further described below in conjunction with the specification drawings and embodiments.
[0024] Refer to the appendix Figures 1 - 5, A two-stage viscous damper with adjustable damping force, comprising a cylinder barrel 1, a piston 2 arranged in the cylinder barrel, a left guide sleeve 3 and a right guide sleeve 4 respectively fixed on the inner wall of the cylinder barrel on both sides of the piston, and O-ring seals 5 respectively arranged between the left guide sleeve, the right guide sleeve and the inner wall of the cylinder barrel to make the seal better. The first cavity 6 formed by the left guide sleeve, the second cavity 7 formed by the piston and the right guide sleeve, a guide rod 8 respectively passing through the right guide sleeve, the piston and the left guide sleeve and fixed to the piston, Y-shaped seals 9 and star seals 91 arranged on the contact surfaces of the guide rod with the left guide sleeve and the right guide sleeve to make the seal better, adjusting rods 10 and guide rods 11 respectively fixed at both ends on the left guide sleeve and the right guide sleeve. In order to make the piston move smoothly back and forth along the adjusting rod and have a good vibration isolation effect, two adjusting rods and two guide rods are provided, alternately and evenly distributed through the cross-section of the piston, a static connector 12 fixed at the rear end of the left guide sleeve and a rod-end connector 13 fixed at the end of the guide rod, which is convenient to connect with the embedded parts respectively embedded in the shear wall during use;
[0025] See again Figure 3 , The adjusting rod is a stepped rod with a thin middle and thick ends. When the stepped rod drives the piston to move back and forth, the gap between the adjusting rod and the piston can change from a large gap to a small gap, realizing two-stage damping force output; the lengths of each section of the stepped adjusting rod are determined by the design displacement of the two-stage viscous damper, and the diameters of each section are determined by the magnitude of the damping force, enabling the magnitude of the damping force to be adjustable. The first cavity and the second cavity are filled with silicone oil. The adjusting rod and the guide rod pass through the piston and can move in the piston. There are gaps for silicone oil to pass through between the adjusting rod and the guide rod and the piston, and between the piston and the inner side surface of the cylinder barrel.
[0026] See again Figure 4 , Limit plates 14 can also be respectively arranged on the inner side surfaces of the left guide sleeve and the right guide sleeve. A group of small holes 141 are opened on the limit plates as reserved oil passing hole positions. By connecting an external oil injection device and a vacuum pumping device, the oil injection and vacuum pumping processes are completed, and both ends of the adjusting rod and the guide rod are respectively fixed on the limit plates.
[0027] As a preferred design, annular pressing plates 15 are respectively fixed on two cross-sections of the piston. The adjusting rod and the guide rod pass through the annular pressing plates and can move in the piston. Wear-resistant rings 16 are arranged between the guide rod and the piston to make the piston move smoothly back and forth along the adjusting rod and have a good vibration isolation effect. A threaded sleeve 17 can also be internally threaded and connected to the end of the cylinder barrel to press the right guide sleeve, which is convenient for installation. Pin holes 18 are respectively opened on the static connector and the rod-end connector, which is convenient for connecting with the pin holes on the embedded parts respectively embedded in the shear wall.
[0028] See Figure 6, when the utility model is in use, two embedded plates A are respectively embedded in two shear walls B, and the nodal plates C with pin holes are respectively welded on the embedded plates A. During installation, the static connector and the rod end connector are respectively connected to the nodal plate C through the pin holes with pins. When an earthquake acts on the utility model, the rod end connector drives the guide rod to make a reciprocating linear motion in the cylinder at a certain speed. When the piston moves in the cylinder, the adjusting rod remains stationary. The silicone oil flows in the first cavity and the second cavity through the gaps between the piston and the cylinder and between the piston and the adjusting rod. When the silicone oil flows through the gaps, a damping force is generated to dissipate the seismic energy and weaken the damage of the earthquake to the main structure of the building. The adjusting rod is designed in a stepped manner. When the piston moves at a certain speed in the small-diameter stroke section of the adjusting rod, the damping force output of the viscous damper is a certain value. When the piston moves in the large-diameter stroke section of the adjusting rod, at the same speed, the damping force output of the viscous damper is another certain value, realizing the function that the damping force outputs are different in two different displacement sections at the same speed.
[0029] The embodiments described above are only descriptions of the preferred modes of the utility model, and do not limit the scope of the utility model. Without departing from the design spirit of the utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the utility model shall fall within the protection scope determined by the claims of the utility model.
Claims
1. A two-stage viscous damper with adjustable damping force, characterized in that: It comprises a cylinder (1), a piston (2) arranged in the cylinder, a left guide sleeve (3) and a right guide sleeve (4) respectively fixed on the inner wall of the cylinder and located on both sides of the piston, an O-ring (5) respectively arranged between the left guide sleeve, the right guide sleeve and the inner wall of the cylinder, a first cavity (6) formed by the piston and the left guide sleeve, a second cavity (7) formed by the piston and the right guide sleeve, a guide rod (8) respectively passing through the right guide sleeve, the piston and the left guide sleeve and fixed to the piston, a Y-shaped sealing ring (9) and a step seal (91) respectively arranged on the contact surface between the guide rod and the left guide sleeve and the right guide sleeve, an adjusting rod (10) and a guide rod (11) respectively fixed at both ends to the left guide sleeve and the right guide sleeve, a static connector (12) fixed to the rear end of the left guide sleeve, and a rod end connector (13) fixed to the end of the guide rod; The adjusting rod is a stepped rod that is thin in the middle and thick at both ends. Silicone oil is filled in the first cavity and the second cavity. The adjusting rod and the guide rod pass through the piston and can move in the piston. There are gaps between the adjusting rod and the guide rod and the piston, and between the piston and the inner side of the cylinder for silicone oil to pass through.
2. A dual-stage viscous damper with adjustable damping force according to claim 1, characterized in that: The regulating rods and the guide rods are each provided with two, and are alternately and evenly distributed across the cross section of the piston.
3. A dual-stage viscous damper with adjustable damping force according to claim 1, characterized in that: A limit plate (14) is provided on the inner side surfaces of the left guide sleeve and the right guide sleeve, and the two ends of the adjustment rod and the guide rod are respectively fixed on the limit plate.
4. A dual-stage viscous damper with adjustable damping force according to claim 3, characterized in that: A group of small holes (141) are formed on the limiting plate.
5. The dual-stage viscous damper with adjustable damping force according to claim 1, characterized in that: An annular pressure plate (15) is fixed to each of the two cross sections of the piston, and the regulating rod and the guide rod pass through the annular pressure plate and can move in the piston.
6. A dual-stage viscous damper with adjustable damping force according to claim 1, characterized in that: A wear-resistant ring (16) is arranged between the guide rod and the piston.
7. A dual-stage viscous damper with adjustable damping force according to any one of claims 1 to 6, characterized in that: A threaded sleeve (17) is internally threadedly connected to the front end of the cylinder to press the right guide sleeve.
8. A dual-stage viscous damper with adjustable damping force according to any one of claims 1 to 6, characterized in that: One end of the static connector is connected to the internal thread of the cylinder barrel and the end presses the left guide sleeve.
9. A dual-stage viscous damper with adjustable damping force according to any one of claims 1 to 6, characterized in that: The static connector and the rod end connector are respectively provided with pin holes (18).