Variable-friction self-resetting inerter

Abstract

The invention relates to the technical field of engineering earthquake resistance, in particular to a friction-variable self-resetting inerter which comprises an external rigid frame, a connecting sleeve and a movable end, a friction energy dissipation component, a self-resetting component and a ball screw are arranged in the rigid frame, the ball screw transversely penetrates through the rigid frame, a ball nut is connected to the middle of the ball screw in a sleeving mode, and the connecting sleeve is connected with the movable end. The ball nut is fixed in the rigid frame through a ball bearing, the ball screw is provided with a friction energy dissipation component and a self-reset component which are symmetrically connected to the two sides of the ball nut in a sleeving mode, and the friction energy dissipation component comprises a rotating disc, four friction sliding blocks, a disc cover plate and a reset spring; the rotating disc is fixedly connected with the ball nut, the rotating disc comprises a bottom plate and an annular protrusion, the annular protrusion is provided with four first connecting cylinders and a plurality of bolt holes, and a variable friction system is composed of the rotating disc and a movable friction sliding block, so that the positive pressure borne by the friction sliding block changes along with the change of the rotating speed of the disc.

Description

Technical Field

[0001] This invention relates to the field of seismic engineering technology, and in particular to a variable friction self-resetting inertial container. Background Technology

[0002] To mitigate the impact of earthquakes and protect the safety of buildings and their occupants and equipment, energy dissipation and vibration reduction technologies have become an indispensable key means for earthquake resistance and disaster prevention in modern engineering structures. Traditional seismic design consumes energy at the cost of structural component damage, which easily leads to large residual deformations, making post-earthquake repair difficult and costly.

[0003] Currently, energy dissipation and vibration reduction technologies mainly rely on various types of dampers. Among them, friction dampers are widely used due to their simple structure and strong energy dissipation capacity, but the friction force they generate remains constant and cannot change according to the earthquake intensity, and they lack self-resetting capability, resulting in large residual displacement after an earthquake. Self-resetting dampers can effectively reduce residual displacement, but they often increase the stiffness of the structure and may amplify the floor acceleration. Inertial navigation systems, as an acceleration-dependent control device, can significantly extend the structural period and reduce acceleration response through the "apparent mass" effect generated by the rotation of their flywheel, but they lack an efficient energy dissipation mechanism. Summary of the Invention

[0004] The purpose of this application is to provide a variable friction self-resetting inertial container, which aims to solve the problems in the prior art.

[0005] This application provides a variable friction self-resetting inertial container, including an outer rigid frame, a connecting sleeve, and a movable end. The rigid frame contains a friction energy dissipation component, a self-resetting component, and a ball screw. The ball screw transversely penetrates the rigid frame, and a ball nut is sleeved in the middle of the ball screw. The ball nut is fixed within the rigid frame by a ball bearing. The ball screw has friction energy dissipation components and a self-resetting component symmetrically sleeved on both sides of the ball nut. The friction energy dissipation component includes a rotating disk, four friction sliders, a disk cover plate, and a reset spring. The rotating disk is fixedly connected to the ball nut and includes a base plate and an annular protrusion. The annular protrusion has four first connecting cylinders and several bolt holes. Each friction slider has a second connecting cylinder and a rectangular block on both sides. The disc cover has four sets of limiting slots with different orientations and several bolt holes. The limiting slots include first slots and second slots. The first slots and second slots in the same set are on the same radial line. The first connecting cylinders are slidably inserted into the first slots, and the second connecting cylinders are slidably inserted into the second slots. A return spring is provided between each set of first connecting cylinders and second connecting cylinders. The self-resetting component is sleeved on both ends of the ball screw. The self-resetting component includes a disc spring and a return sleeve.

[0006] Preferably, the rigid frame is provided with concave baffles on both sides, the concave baffles are sleeved on the outer wall of the reset sleeve, the connecting sleeve is fixedly connected to the concave baffle on one side, and the movable end is slidably inserted into the reset sleeve from the concave baffle on the other side and connected to the ball screw.

[0007] Preferably, the outer end of the reset sleeve is provided with a pressure plate limiting cover connected by a thread, and the reset sleeve is provided with a disc spring and a sliding pressure plate.

[0008] Preferably, the connecting sleeve is provided with a sliding block, which is in detachable contact with the other end of the ball screw.

[0009] Preferably, the friction energy dissipation component is rotatably installed inside the fixed sleeve, a friction ring plate is fitted on the inner wall of the fixed sleeve, the friction ring plate is located outside the friction slider, the friction energy dissipation component and the fixed sleeve are both sleeved on the outside of the ball screw, and the fixed sleeve is fixedly connected to the rigid frame.

[0010] Preferably, the disc cover plate and the rotating disc are connected by connecting bolts, the friction slider is located between the rotating disc and the disc cover plate, the return spring is radially installed between the friction slider and the disc cover plate, and the four friction sliders form a ring and are arranged around the annular protrusion.

[0011] Preferably, the base plate of the rotating disk has four rectangular holes, and the rectangular block is slidably inserted into the rectangular holes, wherein the radial length of the rectangular block is less than the radial length of the rectangular hole.

[0012] Preferably, the diameter of the second connecting cylinder is smaller than the radial length of the second slot, to ensure that the friction slider slides radially without obstruction.

[0013] Preferably, both the connecting sleeve and the outer end of the movable end are provided with connecting lugs.

[0014] The beneficial effects of this invention are:

[0015] 1. The present invention provides a variable friction self-resetting inertial container, which is a variable friction system consisting of a rotating disk and a movable friction slider. The normal pressure on the friction slider changes with the rotation speed of the disk, and thus the magnitude of the friction force can be adjusted according to the earthquake intensity.

[0016] 2. By connecting the friction slider and the rotating disk with a return spring, the return spring can pull the friction slider back to its original position when the disk stops rotating, thus eliminating the friction force and helping the inertial container to achieve self-reset.

[0017] 3. By configuring disc springs in the sleeve, they are compressed during earthquakes and can achieve self-resetting function after the earthquake. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall external structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0020] Figure 3 for Figure 2 Detailed structural diagram at point A in the middle.

[0021] Figure 4 This is a schematic diagram of the fixed sleeve structure.

[0022] Figure 5 This is a schematic diagram of a rotating disk structure.

[0023] Figure 6 This is a schematic diagram of the friction slider structure.

[0024] Figure 7 This is a schematic diagram of the disc cover plate structure.

[0025] Figure 8 This is a diagram showing the location distribution of each component in the friction energy dissipation structure.

[0026] Figure 9 This is a schematic diagram of the self-resetting component structure.

[0027] In the picture:

[0028] 1. Rigid frame; 11. Connecting ear seat; 12. Concave baffle; 2. Movable end; 4. Connecting sleeve; 41. Sliding block; 5. Reset sleeve; 51. Pressure plate limit cover; 52. Sliding pressure plate; 53. Disc spring; 6. Ball screw; 61. Ball nut; 62. Ball bearing; 7. Vertical steel plate; 8. Friction energy dissipation component; 81. Fixed sleeve; 82. Friction ring plate; 83. Friction slider; 831. Second connecting cylinder; 832. Rectangular block; 84. Disc cover plate; 841. Second slot; 842. First slot; 85. Rotating disc; 851. Base plate; 852. Annular protrusion; 853. First connecting cylinder; 854. Rectangular hole; 86. Reset spring; 9. Bolt hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 9The illustrated variable friction self-resetting inertial container includes an outer rigid frame 1, a connecting sleeve 4, and a movable end 2. The rigid frame 1 contains a friction energy dissipation component 8, a self-resetting component, and a ball screw 6. The ball screw 6 transversely penetrates the rigid frame 1, and a ball nut 61 is sleeved in the middle of the ball screw 6. The ball nut 61 is fixed within the rigid frame 1 by a ball bearing 62. The ball screw 6 has friction energy dissipation components 8 and self-resetting components symmetrically sleeved on both sides of the ball nut 61. The friction energy dissipation component 8 includes a rotating disk 85, four friction sliders 83, a disk cover plate 84, and a reset spring 86. The rotating disk 85 is fixedly connected to the ball nut 61 and includes a base plate 851 and an annular protrusion 852. The annular protrusion 852 has... The system includes four first connecting cylinders 853 and several bolt holes 9. Each friction slider 83 has a second connecting cylinder 831 and a rectangular block 832 on both sides. The disc cover plate 84 has four sets of limiting slots with different orientations and several bolt holes 9. The limiting slots include first slots 842 and second slots 841. The first slots 842 and second slots 841 in the same set are on the same radial line. The first connecting cylinders 853 and first slots 842 are slidably inserted into each other, and the second connecting cylinders 831 and second slots 841 are slidably inserted into each other. A return spring 86 is provided between each set of first connecting cylinders 853 and second connecting cylinders 831. The self-resetting component is sleeved on both ends of the ball screw 6. The self-resetting component includes a disc spring 53 and a return sleeve 5.

[0031] The first slot 842 on the disc cover plate 84 is located on the inner side, and the second slot 841 is located on the outer side. The bolt holes 9 on the disc cover plate 84 correspond to the bolt holes 9 on the rotating disc 85, and are used to fix the entire friction energy dissipation component 8 and the ball nut 61 to each other with bolts.

[0032] The rigid frame 1 has concave baffles 12 on both sides. The concave baffles 12 are sleeved on the outer wall of the reset sleeve 5. The connecting sleeve 4 is fixedly connected to the concave baffle 12 on one side. The movable end 2 slides into the reset sleeve 5 from the concave baffle 12 on the other side and is connected to the ball screw 6.

[0033] The outer end of the reset sleeve 5 is provided with a pressure plate limiting cover 51 connected by threads. The reset sleeve 5 is provided with a disc spring 53 and a sliding pressure plate 52. The sliding pressure plate 52 is located between the movable end 2 and the disc spring 53. Both the disc spring 53 and the sliding pressure plate 52 are sleeved on the ball screw 6.

[0034] The connecting sleeve 4 is provided with a sliding block 41. The sliding block 41 is detachably connected to the other end of the ball screw 6. The connecting sleeve 4 is hollow, and the sliding block 41 can slide relative to the ball screw 6 within a certain distance, providing linear motion space for the ball screw 6.

[0035] The connecting sleeve 4 does not move relative to the rigid frame 1. The pushing and pulling caused by vibration is mainly achieved by the sliding insertion motion of the movable end 2. When the ball screw 6 moves axially under external load, the operation of the self-resetting component is as follows: First, the movable end 2 pushes the ball screw 6 to move axially, and at the same time pushes the sliding pressure plate 52 to compress the disc spring 53, causing the disc spring 53 to store elastic potential energy. After the external load disappears, the disc spring 53 releases its elastic potential energy, and drives the ball screw 6 to move in the opposite direction through the sliding pressure plate 52 and the movable end 2, thereby realizing the self-resetting function of the inertial container. The self-resetting components at both ends have the same structure and will not be described in detail.

[0036] The friction energy dissipation component 8 is rotatably installed inside the fixed sleeve 81. The friction ring plate 82 is fitted on the inner wall of the fixed sleeve 81. The friction ring plate 82 is located around the friction slider 83. The friction energy dissipation component 8 and the fixed sleeve 81 are both sleeved on the outside of the ball screw 6. The fixed sleeve 81 is fixedly connected to the rigid frame 1.

[0037] In a specific embodiment, three vertical steel plates 7 can be set inside the rigid frame 1. The ball bearing 62 is connected to the middle vertical steel plate 7, and the inner ends of the two reset sleeves 5 are fixedly connected to the vertical steel plates 7 on both sides. At the same time, the fixing sleeves 81 used to install the friction energy dissipation components are also fixedly set on the vertical steel plates on both sides. The energy dissipation process of the friction energy dissipation components is as follows: When the ball screw 6 is subjected to an external force and moves laterally, the two friction energy dissipation components 8 will play a role at the same time. Taking the friction energy dissipation component on one side as an example, when the ball screw 6 moves laterally... During linear displacement, the ball nut 61 rotates, causing the rotating disk 85 and the entire friction energy dissipation component 8 to rotate. At this time, the friction slider 83 is subjected to centrifugal force, overcomes the tension of the return spring 86, and slides outward radially until the friction slider 83 contacts the friction ring plate 82 and generates friction energy dissipation. When the earthquake intensity is greater, the rotating disk 85 rotates faster, the centrifugal force on the friction slider 83 is greater, and thus the friction force is greater and the energy dissipation is greater. Therefore, the friction energy dissipation capacity can be changed with the earthquake intensity.

[0038] The disc cover plate 84 and the rotating disc 85 are connected by connecting bolts. The friction slider 83 is located between the rotating disc 85 and the disc cover plate 84. The return spring 86 is radially installed between the friction slider 83 and the disc cover plate 84. The four friction sliders 83 form a ring and are arranged around the annular protrusion 852.

[0039] The base plate 851 of the rotating disk 85 is provided with four rectangular holes 854. The rectangular block 832 is slidably inserted into the rectangular holes 854. The radial length of the rectangular block 854 is less than the radial length of the rectangular hole 854.

[0040] The diameter of the second connecting cylinder 831 is smaller than the radial length of the second slot 841; both the rectangular hole 854 and the second slot 841 are interference fits to ensure that the friction slider 83 is not obstructed when it slides radially under the action of centrifugal force.

[0041] In one embodiment, both the connecting sleeve 4 and the outer end of the movable end 2 are provided with connecting lugs 11 for mounting the entire inertial container onto the engineering structure.

[0042] The entire inertial container is installed on the corresponding engineering structure. When the ball screw 6 is subjected to a rightward external force, the movable end 2 pushes the sliding pressure plate 52 to slide to the right within the reset sleeve 5, thereby compressing the disc spring 53 and storing elastic potential energy. Simultaneously, the rotation of the ball screw 6 drives the ball nut 61 to rotate, which in turn drives the rotating disk 85 to rotate synchronously. As the rotating disk 85 rotates, the friction slider 83 overcomes the tension of the reset spring 86 under centrifugal force, sliding radially outward until it contacts the friction ring plate 82 and generates frictional energy dissipation. As the external force continues to act, the ball screw 6 continues to move to the right, the compression of the disc spring 53 gradually increases, and the stored elastic potential energy also increases accordingly. The frictional force between the friction slider 83 and the friction ring plate 82 is adjusted according to the rotational speed of the rotating disk 85. The higher the rotational speed, the greater the centrifugal force, and the greater the frictional force, resulting in a more significant energy dissipation effect. When the external force to the right disappears, the disc spring 53 releases its stored elastic potential energy, pushing the sliding pressure plate 52 to the left. The sliding pressure plate 52 drives the movable end 2 and the ball screw 6 to reset to the left. The reverse lateral movement of the ball screw 6 causes the ball nut 61 and the rotating disk 85 to gradually reduce their rotational speed. The centrifugal force on the friction slider 83 decreases. Under the tension of the reset spring 86, the friction slider 83 slides radially inward, disengaging from the friction ring plate 82. The friction between them disappears, and the entire inertial container returns to its initial state, ensuring that no friction is generated during the entire self-reset process. When the ball screw 6 is subjected to an external force to the left, the operation of each component is exactly the same as when it is subjected to an external force to the right, and will not be described again here.

[0043] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solutions of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0044] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A variable friction self-resetting inertial container, characterized in that, The system includes an external rigid frame, a connecting sleeve, and a movable end. The rigid frame contains a friction-dissipating component, a self-resetting component, and a ball screw. The ball screw transversely penetrates the rigid frame, and a ball nut is sleeved in the middle of the ball screw. The ball nut is fixed within the rigid frame by a ball bearing. The ball screw has symmetrically fitted friction-dissipating and self-resetting components on both sides of the ball nut. The friction-dissipating component includes a rotating disk, four friction sliders, a disk cover plate, and a return spring. The rotating disk is fixedly connected to the ball nut and includes a base plate and an annular protrusion. The annular protrusion has four first... The system includes a connecting cylinder and several bolt holes. Each friction slider has a second connecting cylinder and a rectangular block on both sides. The disc cover has four sets of limiting slots with different orientations and several bolt holes. The limiting slots include a first slot and a second slot. The first slot and the second slot in the same set are on the same radial line. The first connecting cylinder is slidably inserted into the first slot, and the second connecting cylinder is slidably inserted into the second slot. A return spring is provided between each set of the first connecting cylinder and the second connecting cylinder. The self-resetting component is sleeved on both ends of the ball screw. The self-resetting component includes a disc spring and a return sleeve.

2. The variable friction self-resetting inertial container according to claim 1, characterized in that, The rigid frame is provided with concave baffles on both sides. The concave baffles are sleeved on the outer wall of the reset sleeve. The connecting sleeve is fixedly connected to the concave baffle on one side. The movable end slides into the reset sleeve from the concave baffle on the other side and is connected to the ball screw.

3. The variable friction self-resetting inertial container according to claim 2, characterized in that, The outer end of the reset sleeve is provided with a pressure plate limiting cover connected by threads, and the reset sleeve is provided with a disc spring and a sliding pressure plate.

4. The variable friction self-resetting inertial container according to claim 2, characterized in that, The connecting sleeve is provided with a sliding block, which can be detachably contacted with the other end of the ball screw.

5. The variable friction self-resetting inertial container according to claim 1, characterized in that, The friction energy dissipation component is rotatably installed inside the fixed sleeve. A friction ring plate is fitted on the inner wall of the fixed sleeve. The friction ring plate is located around the friction slider. Both the friction energy dissipation component and the fixed sleeve are sleeved on the outside of the ball screw. The fixed sleeve is fixedly connected to the rigid frame.

6. The variable friction self-resetting inertial container according to claim 1, characterized in that, The disc cover plate is connected to the rotating disc by connecting bolts. The friction slider is located between the rotating disc and the disc cover plate. The return spring is radially installed between the friction slider and the disc cover plate. The four friction sliders form a ring and are arranged around the annular protrusion.

7. The variable friction self-resetting inertial container according to claim 1, characterized in that, The base plate of the rotating disk has four rectangular holes, and the rectangular block is slidably inserted into the rectangular holes. The radial length of the rectangular block is less than the radial length of the rectangular hole.

8. The variable friction self-resetting inertial container according to claim 1, characterized in that, The diameter of the second connecting cylinder is smaller than the radial length of the second slot to ensure that the friction slider slides radially without obstruction.

9. The variable friction self-resetting inertial container according to claim 1, characterized in that, Both the connecting sleeve and the outer end of the movable end are provided with connecting lugs.

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