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

Abstract

The 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, comprising an inertia device and a self-resetting device which are connected through a ball screw; the inertia device comprises a piston type viscous damping part, a ball nut and a cylindrical rotating wheel; the piston type viscous damping component and the ball nut are sleeved with the cylindrical rotating wheel and located at the two ends of the cylindrical rotating wheel. The ball screw is rotationally connected with the ball nut; a friction block is arranged between the ball nut and the inner wall of the cylindrical rotating wheel; the friction block is connected with the bottom of the connecting piece; the connecting piece comprises a belleville spring set, a high-strength bolt and a pressing plate. The piston type viscous damping component comprises a cylinder body and a piston rod; the self-resetting device comprises an outer sleeve, an inner sleeve, a reset spring and a shaft rod, wherein the outer sleeve and the inner sleeve are fixedly connected in a sleeved mode. The device can meet the energy consumption requirements of different vibration frequencies while solving the problem that the output of a traditional TVMD is too large.

Description

Technical Field

[0001] The 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] As a common passive control device, the tuned viscous mass damper (TVMD) can be directly installed inside the structure in the form of a diagonal brace. It can achieve a mass amplification effect through a high-speed rotating flywheel, and combined with a rotating viscous material, it can directly amplify the viscous damping force, thereby effectively reducing the seismic response of the structure. However, although the traditional TVMD can effectively amplify the damping force of the device, when faced with high-frequency loads, the high-speed rotating flywheel will cause the speed difference of the internal viscous material to increase sharply, resulting in a sudden increase in the damping force, which is prone to excessive TVMD output, causing damage to nodes and other components. In addition, the TVMD needs to design its frequency to be consistent with the main structure frequency in order to achieve its optimal control effect, so its shock absorption frequency band is limited. Summary of the invention

[0003] The purpose of the present application is to provide a self-resetting energy dissipation and shock absorbing 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 absorbing device suitable for node protection, including an inertial device and a self-resetting device, and the two are connected by a ball screw; the inertial device includes a piston-type viscous damping component, a ball nut and a cylindrical rotating wheel; the piston-type viscous damping component and the ball nut are sleeved inside the cylindrical rotating wheel and are located at both ends of the cylindrical rotating wheel; 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 rotating wheel; the friction block is connected to the bottom of the connecting piece; the connecting piece 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, 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; 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 arranged inside the cylindrical rotating wheel by press-fitting 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 rod 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 wheel 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 pad and a fourth steel pad 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 wheel.

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

[0012] The beneficial effects of the present invention are as follows: the present invention combines the viscous damping component, the inertial device and the self-reset device in parallel, thereby achieving better mass effect and energy dissipation performance, setting friction material between the ball nut and the cylindrical runner and pre-tightening it through the spring assembly, setting the friction force according to the node bearing capacity, preventing the device from outputting too much force under high-frequency loads, thereby protecting the node. At the same time, the mass amplification effect of the inertial capacity is directly utilized to adjust the structural dynamic characteristics, so that the device can 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 It 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 figure:

[0017] 1. Left connecting ear plate; 101. Disc spring assembly; 102. High-strength bolts; 103. Pressure plate; 104. First steel pad; 105. Second steel pad; 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 pad; 17. Return spring; 18. Fourth steel pad; 19. Fastening nut; 20. Right connecting ear plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 3 A self-resetting energy dissipation and shock absorbing device suitable for node protection is shown, comprising an inertia device and a self-resetting device, and the two are connected by a ball screw 13; the inertia device comprises 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 arranged 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 the 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 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 9, a return spring 17 and a shaft 7 that are fixedly sleeved; the self-resetting device is provided with a mounting groove and sliding channels on both sides, and the diameter of the sliding channel is smaller than the diameter 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 sleeved outside the shaft 7; the shaft 7 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 13 are fixedly connected to the shaft 7 and the piston rod 12 respectively. When the vibration is transmitted to the ball screw 13, the force transmission and control are realized through the ball screw 13, and at the same time, the piston rod 12 can be driven to generate piston movement in the cylinder body 4, and the large displacement is absorbed by the viscous damping component, which can cope with large displacement and large force output at the same time, 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, the piston rod 12 is arranged inside the cylinder body 4, and the two sides of the cylinder body 4 are connected to the piston rod 11 through the plug 9 to form a sealed cavity, and 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 disposed at one end of the shaft rod 7 away from the ball screw 13 ; the fastening nut 19 and the external sliding channel can slide relative to each other.

[0024] There are four reserved holes in total, which are regularly arranged on the outer wall of the cylindrical wheel 3 outside the ball nut 5; the disc spring group 101 is provided with a first steel pad 104 and a second steel pad 105 on both sides, which are 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 third steel plate 16 and the fourth steel plate 18 are respectively installed at both ends of the return spring 17; the return spring 17 is a three-layer annular spring, an annular spring or a butterfly spring.

[0026] The friction block 15 is made of friction material and is 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 group 101, a first steel pad 104, a second steel pad 105 and a pressure plate 103 are installed at the reserved hole of the cylindrical runner 3. The high-strength bolt 102 passes through the center hole of the disc spring group 101 and is connected to the pressure plate 103. When the high-strength bolt 102 is tightened, the preload force of the disc spring group 101 acts on the friction block 15 to form a friction force, thereby connecting the cylindrical runner 3 and the ball nut 5 together. The friction force can be set according to the node bearing capacity. The combination of inertial force and adjustable friction force enables the system to effectively exert a shock absorption control effect under both low-frequency and high-frequency vibrations, preventing the device from excessively outputting force under high-frequency loads, thereby causing node damage.

[0028] The outer end of the shaft rod 7 and the outer end of the piston-type viscous component are respectively fixedly connected with a left connecting ear plate 1 and a right connecting ear plate 20 for connecting 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. The degree of tightening of the high-strength bolts 102 can be adjusted according to the requirements of the node bearing capacity, thereby controlling 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 an earthquake, thereby reducing or even eliminating the residual displacement of the structure.

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

[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 invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered 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 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 piece; the connecting piece 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 outside 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 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 a press-fit radial bearing sleeve.

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 rod 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: The third steel pad and the fourth steel pad 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 rotating wheel.

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

Images