A self-resetting energy dissipation and shock absorption device suitable for node protection

Abstract

The present invention relates to the technical field of energy dissipation and shock absorption of building structures, and in particular to a self-resetting energy dissipation and shock absorption device suitable for node protection, comprising an inertia device and a self-resetting device, which are connected by a ball screw; the inertia device comprises a piston-type viscous damping component, a ball nut and a cylindrical runner; the piston-type viscous damping component and the ball nut are sleeved inside the cylindrical runner and are located at both ends of the cylindrical runner; the ball screw is rotatably connected to the ball nut; a friction block is provided between the ball nut and the inner wall of the cylindrical runner; the friction block is connected to the bottom of the connecting member; the connecting member comprises a disc spring group, a high-strength bolt and a pressure plate; the piston-type viscous damping component comprises a cylinder body and a piston rod; the self-resetting device comprises an outer sleeve and an inner sleeve that are fixedly sleeved, a return spring and a shaft rod; this device can solve the problem of excessive output of traditional TVMD while being suitable for energy consumption requirements of different vibration frequencies.

Description

Technical Field

[0001] The present invention relates to the technical field of energy dissipation and shock absorption of building structures, in particular to a self-resetting energy dissipation and shock absorption device suitable for node protection. Background Art

[0002] Tuned viscous mass dampers (TVMDs), a common passive control device, can be installed directly within a structure as diagonal braces. They achieve a mass amplification effect through a high-speed rotating flywheel. Combined with a rotating viscous material, they directly amplify the viscous damping force, effectively reducing the structure's seismic response. However, while traditional TVMDs can effectively amplify the device's damping force, when faced with high-frequency loads, the high-speed rotation of the flywheel causes a sharp increase in the velocity difference of the internal viscous material, resulting in a sudden increase in the damping force. This can easily lead to excessive TVMD output, which can damage components such as joints. Furthermore, the TVMD's frequency must be designed to coincide with the main structural frequency to achieve optimal control, resulting in a limited vibration damping frequency band. Summary of the Invention

[0003] The purpose of this application is to provide a self-resetting energy dissipation and shock absorption device suitable for node protection, which can solve the problem of excessive output of traditional TVMD and be suitable for energy consumption requirements of different vibration frequencies.

[0004] The embodiment of the present application provides a self-resetting energy dissipation and shock absorption device suitable for node protection, including an inertia device and a self-resetting device, and the two are connected by a ball screw; the inertia device includes a piston-type viscous damping component, a ball nut and a cylindrical runner; the piston-type viscous damping component and the ball nut are sleeved inside the cylindrical runner and are located at both ends of the cylindrical runner; the ball screw is rotatably connected to the ball nut; a friction block is provided between the ball nut and the inner wall of the cylindrical runner; the friction block is connected to the bottom of the connecting member; the connecting member includes a disc spring group, a high-strength bolt and a pressure plate; the disc spring group is located in the reserved hole ; The high-strength bolt extends from the outer surface of the cylindrical wheel into the middle of the disc spring group; the pressure plate is located between the disc spring group and the friction block; the piston-type viscous damping component includes a cylinder body and a piston rod; the interior of the cylinder body is filled with a damping medium; the self-resetting device includes an outer sleeve and an inner sleeve that are fixedly connected, a return spring and a shaft rod; the self-resetting device is provided with a mounting groove and sliding channels on both sides; the return spring is slidably installed in the mounting groove; the return spring is slidably connected to the outside of the shaft rod; the shaft rod passes through the entire self-resetting device from the middle and is slidably connected to the sliding channel; the two ends of the ball screw are fixedly connected to the shaft rod and the piston rod respectively.

[0005] Furthermore, the piston-type viscous damping component and the ball nut are both mounted inside the cylindrical wheel via press-fit radial bearing sleeves.

[0006] Furthermore, the piston-type viscous damping component also includes a plug and a piston; the piston is fixedly sleeved on the middle part of the piston rod; the piston rod passes through the middle of the plug and is sealed with the plug.

[0007] Furthermore, a fastening nut is provided at one end of the shaft away from the ball screw; relative sliding can occur between the fastening nut and the external sliding channel.

[0008] Furthermore, there are four reserved holes in total, and the four reserved holes are regularly arranged on the outer wall of the cylindrical runner outside the ball nut; a first steel plate and a second steel plate are respectively provided on both sides of the disc spring group.

[0009] Furthermore, a third steel plate and a fourth steel plate are respectively installed at both ends of the return spring; the return spring is a three-layer annular spring, an annular spring or a butterfly spring.

[0010] Furthermore, the friction blocks are evenly distributed between the ball nut and the inner wall of the cylindrical runner.

[0011] Furthermore, the outer end of the shaft and the outer end of the piston-type viscous component are fixedly connected to a left connecting ear plate and a right connecting ear plate respectively.

[0012] The present invention achieves the following beneficial effects: It combines a viscous damping component, an inertial device, and a self-reset mechanism in parallel, achieving enhanced mass effect and energy dissipation performance. Friction material is placed between the ball nut and the cylindrical wheel and preloaded via a spring assembly. The friction force is set according to the node's load capacity, preventing the device from exerting excessive force under high-frequency loads, thereby protecting the node. Furthermore, by directly utilizing the mass amplification effect of the inertial capacity, the structural dynamic characteristics can be adjusted, allowing the device to adapt to a wider range of load frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the overall structure of the present invention.

[0014] Figure 2 This is an enlarged view of the structure in Example 1 of the present invention.

[0015] Figure 3 It is a cross-sectional view of the overall structure of the present invention when it is under tension and compression.

[0016] In the picture:

[0017] 1. Left connecting ear plate; 101. Disc spring assembly; 102. High-strength bolts; 103. Pressure plate; 104. First steel plate; 105. Second steel plate; 2. Radial bearing; 3. Cylindrical runner; 4. Cylinder body; 5. Ball nut; 6. Inner sleeve; 7. Shaft; 8. Outer sleeve; 9. Plug; 10. Damping medium; 11. Piston; 12. Piston rod; 13. Ball screw; 14. Ball; 15. Friction block; 16. Third steel plate; 17. Return spring; 18. Fourth steel plate; 19. Fastening nut; 20. Right connecting ear plate. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figures 1 to 3 A self-resetting energy dissipation and shock absorption device suitable for node protection is shown, including an inertia device and a self-resetting device, and the two are connected by a ball screw 13; the inertia device includes a piston-type viscous damping component, a ball nut 5 and a cylindrical runner 3; the piston-type viscous damping component and the ball nut 5 are sleeved inside the cylindrical runner 3 and are located at both ends of the cylindrical runner 3; the ball screw 13 is rotatably connected to the ball nut 5; the ball nut 5 has a raceway inside; rolling balls 14 are provided in the raceway; the ball nut 5 is rotatably sleeved on the outside of the ball screw 13 through the balls 14; when the ball screw undergoes a straight linear motion, the balls 14 roll along these raceways, thereby converting the linear motion of the ball screw 13 into rotational motion of the ball nut 5.

[0020] A friction block 15 is provided between the ball nut 5 and the inner wall of the cylindrical runner 3; the friction block 15 is connected to the bottom of the connecting piece; the connecting piece includes a disc spring group 101, a high-strength bolt 102 and a pressure plate 103; the disc spring group 101 is located in a reserved hole; the high-strength bolt 102 extends from the outer surface of the cylindrical runner 3 into the middle of the disc spring group 101; the pressure plate 103 is located between the disc spring group 101 and the friction block 15 and is connected to the two respectively; the piston-type viscous damping component includes a cylinder body 4 and a piston rod 12; the interior of the cylinder body 4 is filled with a damping medium 10, which can be optionally Silicone oil or other medium with damping properties is used. The self-resetting device includes an outer sleeve 8 and an inner sleeve 6, which are fixedly connected, a return spring 17, and a shaft 7. The self-resetting device is provided with a mounting groove and sliding channels on both sides. The diameter of the sliding channels is smaller than that of the mounting groove to prevent the return spring 17 from sliding out of the mounting groove, which is a common design. The return spring 17 is slidably installed in the mounting groove. The return spring 17 is slidably connected to the outside of the shaft 7. The shaft 7 runs through the entire self-resetting device from the middle and is slidably connected to the sliding channels. The ends of the ball screw 13 are fixedly connected to the shaft 7 and the piston rod 12, respectively. When vibration is transmitted to the ball screw 13, force is transmitted and controlled by the ball screw 13, and the piston rod 12 is driven to produce piston motion within the cylinder 4. The viscous damping component absorbs large displacements, and can simultaneously cope with large displacements and large force output, making its energy absorption efficiency higher.

[0021] The piston-type viscous damping component and the ball nut 5 are both mounted inside the cylindrical wheel 3 by press-fitting radial bearings 2. The radial bearings 2 are respectively located at both ends of the cylinder body 4 and the ball nut 5. The friction block 15 is installed in the gap between the two radial bearings 2 outside the ball nut 5.

[0022] The piston-type viscous damping component also includes a plug 9 and a piston 11; the piston 11 is fixedly sleeved on the middle of the piston rod 12; the piston rod 12 passes through the middle of the plug 9 and is sealed with the plug 9. The outer end of the cylinder body 4 is fixedly connected to the left connecting ear plate 1, and the piston rod 12 is arranged inside the cylinder body 4. The two sides of the cylinder body 4 are connected to the piston rod 12 through the plug 9 to form a sealed cavity. There is a damping medium 10 in the sealed cavity. When the ball screw is displaced due to vibration, the piston rod 12 can produce piston movement in the cylinder body 4, and a certain purpose of shock absorption and energy consumption is achieved by compressing the damping liquid in the cylinder.

[0023] A fastening nut 19 is provided at one end of the shaft 7 away from the ball screw 13 ; the fastening nut 19 can slide relative to the external sliding channel.

[0024] There are four reserved holes in total, which are regularly arranged on the outer wall of the cylindrical runner 3 outside the ball nut 5; the disc spring group 101 is respectively provided with a first steel pad 104 and a second steel pad 105 on both sides, and is tightened by high-strength bolts 102, the first steel pad 104, the second steel pad 105 and the pressure plate 103 to adjust the preload force applied to the friction block 15.

[0025] The return spring 17 is provided with a third steel plate 16 and a fourth steel plate 18 at both ends thereof. The return spring 17 is a three-layer annular spring, an annular spring or a butterfly spring.

[0026] The friction blocks 15 are made of friction material and are evenly distributed between the ball nut 5 and the inner wall of the cylindrical wheel 3 .

[0027] A friction block 15 is provided between the cylindrical runner 3 and the ball nut 5, and a disc spring assembly 101, a first steel pad 104, a second steel pad 105 and a pressure plate 103 are installed in the reserved hole of the cylindrical runner 3. The high-strength bolt 102 passes through the center hole of the disc spring assembly 101 and is connected to the pressure plate 103. When the high-strength bolt 102 is tightened, the preload force of the disc spring assembly 101 acts on the friction block 15 to form a friction force, thereby connecting the cylindrical runner 3 and the ball nut 5 together. According to the bearing capacity of the node, a combination of friction force, inertia force and adjustable friction force can be set, so that the system can effectively exert a shock absorption control effect under low-frequency and high-frequency vibrations, and prevent the device from outputting too much force under high-frequency loads, thereby causing node damage.

[0028] The outer ends of the shaft 7 and the piston-type viscous component are respectively fixedly connected to the left connecting ear plate 1 and the right connecting ear plate 20 for connection to the building structure.

[0029] In the present invention, when the right connecting ear plate 20 undergoes relative displacement, the shaft rod 7 fixedly connected thereto can drive the ball screw 13 and the piston rod 12 to move. According to the requirements of the node bearing capacity, the tightness of the high-strength bolts 102 can be adjusted to control the size of the preload force applied to the friction block 15, thereby controlling the friction force limit between the cylindrical runner 3 and the ball nut 5. At the same time, the self-resetting device can provide self-resetting capability. The self-resetting device can ensure that the system can automatically return to its original position after the earthquake, reducing or even eliminating the residual displacement of the structure.

[0030] In actual use, when the friction force limit F is not exceeded, no slip occurs in the rotating friction mechanism, and the cylindrical wheel 3 rotates along with the ball nut 5. When the friction force limit F is exceeded, slip occurs in the rotating friction mechanism. At this time, due to the influence of the friction block 15, the cylindrical wheel 3 will continue to rotate at a slower speed, lower than the speed of the ball nut 5, thereby reducing the inertia effect and the output of the device.

[0031] The spring in the present invention is a damping spring as much as possible. The self-resetting shock-absorbing device suitable for node protection in this embodiment has a simple structure and is easy to install. It can meet the shock absorption requirements under different earthquakes and has good application prospects.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A self-resetting energy dissipation and shock absorption device suitable for node protection, characterized in that: It includes an inertia device and a self-resetting device, and the two are connected by a ball screw; the inertia device includes a piston-type viscous damping component, a ball nut and a cylindrical runner; the piston-type viscous damping component and the ball nut are sleeved inside the cylindrical runner and are located at both ends of the cylindrical runner; the ball screw is rotatably connected to the ball nut; a friction block is provided between the ball nut and the inner wall of the cylindrical runner; the friction block is connected to the bottom of the connecting part; the connecting part includes a disc spring group, a high-strength bolt and a pressure plate; the disc spring group is located in a reserved hole; the high-strength bolt is inserted from the surface of the cylindrical runner The surface extends into the middle of the disc spring group; the pressure plate is located between the disc spring group and the friction block; the piston type viscous damping component includes a cylinder body and a piston rod; the interior of the cylinder body is filled with a damping medium; the self-resetting device includes an outer sleeve and an inner sleeve, a return spring and a shaft rod that are fixedly sleeved; the self-resetting device is provided with a mounting groove and sliding channels on both sides; the return spring is slidably installed in the mounting groove; the return spring is slidably sleeved on the outside of the shaft rod; the shaft rod runs through the entire self-resetting device from the middle and is slidably connected to the sliding channel, and the two ends of the ball screw are fixedly connected to the shaft rod and the piston rod respectively.

2. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 1 is characterized in that: The piston-type viscous damping component and the ball nut are both arranged inside the cylindrical rotating wheel through press-fit radial bearing sleeves.

3. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 2 is characterized in that: The piston type viscous damping component also includes a plug and a piston; the piston is fixedly sleeved on the middle part of the piston rod; the piston rod passes through the middle of the plug and is sealed with the plug.

4. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 1, characterized in that: A fastening nut is provided at one end of the shaft away from the ball screw; relative sliding can occur between the fastening nut and the external sliding channel.

5. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 1 is characterized in that: There are four reserved holes in total, and the four reserved holes are regularly arranged on the outer wall of the cylindrical runner outside the ball nut; a first steel pad and a second steel pad are respectively provided on both sides of the disc spring group.

6. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 1, characterized in that: A third steel plate and a fourth steel plate are respectively installed at both ends of the return spring; the return spring is a three-layer annular spring, an annular spring or a butterfly spring.

7. The self-resetting energy dissipation and shock absorption device suitable for node protection according to claim 1, characterized in that: The friction blocks are evenly distributed between the ball nut and the inner wall of the cylindrical runner.

8. The self-resetting energy dissipation and shock absorption device suitable for node protection according to any one of claims 1 to 7, characterized in that: The outer end of the shaft and the outer end of the piston-type viscous component are respectively fixedly connected to a left connecting ear plate and a right connecting ear plate.

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