A self-resetting variable-damping shear-type lead damper

Abstract

The present invention discloses a self - resetting variable - damping shear - type lead damper, which comprises a sleeved sleeve and a shear cylinder. The sleeve includes an outer cylinder and an inner cylinder coaxially sleeved inside the outer cylinder; the shear cylinder is sleeved at one end of the opening of the outer cylinder. The outer cylinder includes an outer cylinder body and an outer end plate installed at one end of the outer cylinder body, and one end of the inner cylinder is connected to the outer end plate; the outer cylinder body is provided with a first shear groove, the shear cylinder body is provided with a second shear groove, the inner cylinder is provided with a third shear groove, and the limiting block is provided with a fourth shear groove; an outer lead ring is arranged in the first shear groove and the second shear groove, and an inner lead ring is arranged in the third shear groove and the fourth shear groove; when the present invention is subjected to ground motion, the sleeve first drives the inner lead ring to perform a shear motion, and when the displacement is too large, it drives the outer lead ring to perform a shear motion simultaneously, improving the application range of the lead shear - type damper. A good resetting ability is achieved through a reset spring, reducing the residual displacement's influence on the damper's ability to resist the next earthquake.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, and particularly relates to a self-resetting variable-damping shear-type lead damper. Background Art

[0002] China is located between the Circum-Pacific seismic belt and the Eurasian seismic belt. Over the years, the disasters brought by earthquakes have posed serious threats to people's property and lives. The seismic isolation and vibration reduction technology can be adopted to improve the safety of structures and ensure people's safety.

[0003] The lead shear damper is a control device that dissipates energy and reduces vibration by using the shear deformation of lead. It is an energy dissipation and vibration reduction device with excellent energy dissipation performance, simple structure, convenient manufacturing, low cost, and easy replacement. It can be used in combination with seismic isolation bearings and seismic isolation systems as an energy dissipation unit or a limit device, or can be used alone in building structures as an energy dissipation device to provide additional damping and stiffness, so it has a wide range of application prospects.

[0004] At present, the existing lead shear dampers do not have the self-resetting function after an earthquake, which will cause large residual deformations in the structure, and then affect the ability of the structure to resist earthquakes when the next earthquake comes. At the same time, when the structure has a large displacement, the damper may be damaged because the damping force cannot meet the requirements. Therefore, it is of great scientific significance and engineering practical value to develop a new type of self-resetting variable-damping shear-type lead damper that can overcome the defects of traditional lead shear dampers. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a self-resetting variable-damping shear-type lead damper to solve the problems that the dampers in the existing technology do not have the self-resetting function and are difficult to meet the requirements when the displacement is large.

[0006] To solve the above technical problems, the present invention is realized by adopting the following technical solutions: A self-resetting variable-damping shear-type lead damper includes a sleeve shear cylinder sleeved thereon. The sleeve includes an outer cylinder and an inner cylinder coaxially sleeved inside the outer cylinder;

[0007] The outer cylinder is a hollow cylindrical shape with one end open. The shear cylinder is sleeved on the open end of the outer cylinder. The outer cylinder includes an outer cylinder body and an outer end plate installed at one end of the outer cylinder body. One end of the inner cylinder is connected to the outer end plate;

[0008] The shear cylinder is a hollow cylindrical shape with one end open. The shear cylinder includes a shear cylinder body and a shear cylinder plate installed at one end of the shear cylinder body. The shear cylinder body is sleeved between the outer cylinder body and the inner cylinder;

[0009] The shear cylinder further includes a moving pull rod coaxially penetrating through the shear cylinder plate. The moving pull rod extends into the inner cylinder, and a limit block is installed at the end of the moving pull rod extending into the inner cylinder;

[0010] A first connecting plate is installed at one end of the movable pull rod extending out of the shear cylinder plate. A fixed connecting rod is installed on the side of the outer end plate facing away from the shear cylinder, and a second connecting plate is installed on the fixed connecting rod.

[0011] A first shear groove is circumferentially formed on the side of the outer cylinder body facing the inner cylinder, and a second shear groove is circumferentially formed on the side of the shear cylinder body facing the outer cylinder body. The positions of the first shear groove and the second shear groove correspond to each other.

[0012] A third shear groove is circumferentially formed on the side of the inner cylinder facing the limit block, and a fourth shear groove is circumferentially formed on the side of the limit block facing the inner cylinder. The positions of the third shear groove and the fourth shear groove correspond to each other.

[0013] Outer lead rings are arranged in the first shear groove and the second shear groove, and inner lead rings are arranged in the third shear groove and the fourth shear groove.

[0014] The outer lead ring includes a first outer lead ring installed in the first shear groove and a second outer lead ring installed on the side of the first outer lead ring facing the shear cylinder. The second outer lead ring is located in the second shear groove and the axial width of the second outer lead ring is smaller than the width of the second shear groove.

[0015] The inner lead ring includes a first inner lead ring installed in the third shear groove and a second inner lead ring installed on the side of the first inner lead ring facing the limit block. The second outer lead ring is installed in the fourth shear groove and the axial width of the inner lead ring is equal to the width of the fourth shear groove.

[0016] A first return spring is installed between the side of the inner cylinder facing the shear cylinder plate and the shear cylinder plate, and a second return spring is installed between the side of the shear cylinder body facing the outer end plate and the outer end plate.

[0017] The present invention also has the following technical features:

[0018] The first shear groove and the second shear groove have the same axial width, and the axial width of the third shear groove is greater than the axial width of the fourth shear groove.

[0019] The length of the outer cylinder body is greater than the length of the inner cylinder.

[0020] A limit ring is also installed on the side of one end of the inner cylinder facing the shear cylinder plate and facing its own axis.

[0021] Connecting holes are provided on both the first connecting plate and the second connecting plate.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] (I) When the self - reset variable - damping shear - type lead damper of the present invention is subjected to earthquake ground motion, when displacements occur at both the front and rear ends of the self - reset variable - damping shear - type lead damper, the sleeve first drives the inner lead ring to undergo a shear motion. When the displacement is too large, it then drives the outer lead ring to undergo a shear motion simultaneously. By increasing the shear area, the situation of damper damage due to insufficient damping force under large displacements is avoided, and the application range of the lead - shear - type damper is improved. Good reset ability is achieved through the reset spring, avoiding the adverse effects of large displacements of the damper on the equipment and reducing the residual displacement's impact on the damper's ability to resist the next earthquake.

[0024] (II) The overall structure of the present invention has the characteristics of simple structure, low cost, high bearing capacity, high reliability, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention Figure Ⅰ ;

[0026] Figure 2 is a schematic diagram of the overall structure of the present invention Figure Ⅱ ;

[0027] Figure 3 is a schematic diagram of the structure of the present invention under tension;

[0028] (a) is a schematic diagram of the structure when only the inner lead ring is sheared;

[0029] (b) is a schematic diagram of the structure when both the inner and outer lead rings are sheared;

[0030] Figure 4 is a schematic diagram of the structure of the present invention under compression;

[0031] (a) is a schematic diagram of the structure when only the inner lead ring is sheared;

[0032] (b) is a schematic diagram of the structure when both the inner and outer lead rings are sheared;

[0033] Figure 5 is Figure 1 the schematic diagram of the A - A cross - section in

[0034] Figure 6 is Figure 1 the schematic diagram of the B - B cross - section in

[0035] Figure 7 is a schematic diagram of the installation position of the present invention;

[0036] The meanings of each label in the drawings:

[0037] 1 - Sleeve; 2 - Shearing cylinder; 3 - First shearing groove; 4 - Second shearing groove; 5 - Third shearing groove; 6 - Fourth shearing groove; 7 - Outer lead ring; 8 - Inner lead ring; 9 - First return spring; 10 - Second return spring; 11 - Connection hole

[0038] 1 - 1 Outer cylinder, 1 - 2 Inner cylinder, 1 - 3 Fixed connecting rod, 1 - 4 Second connecting plate, 1 - 5 Limit ring

[0039] 2 - 1 Shearing cylinder body, 2 - 2 Shearing cylinder plate, 2 - 3 Moving pull rod, 2 - 4 Limit block, 2 - 5 First connecting plate

[0040] 7 - 1 First outer lead ring, 7 - 2 Second outer lead ring

[0041] 8 - 1 First inner lead ring, 8 - 2 Second inner lead ring

[0042] 1 - 1 - 1 Outer cylinder body, 1 - 1 - 2 Outer end plate

[0043] The following further explains the specific content of the present invention in detail in conjunction with embodiments. Specific embodiments

[0044] The following gives specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0045] The terms "upper", "lower", "front", "rear", "top", "bottom", etc. used in the present invention to indicate the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "Inner" and "outer" refer to the inside and outside of the corresponding component contour, and the above terms should not be construed as a limitation to the present invention.

[0046] In the present invention, unless otherwise stated, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] All components in the present invention, unless otherwise specified, are all components known in the prior art.

[0048] Embodiment 1:

[0049] Complying with the above technical solution, asFigures 1 - 7 As shown in Figures 1 - 7 , a self-resetting variable-damping shear-type lead damper includes a sleeved sleeve 1 and a shear cylinder 2. The sleeve 1 includes an outer cylinder 1-1 and an inner cylinder 1-2 coaxially sleeved inside the outer cylinder 1-1.

[0050] The outer cylinder 1-1 is a hollow cylindrical shape with one end open. The shear cylinder 2 is sleeved at the open end of the outer cylinder 1-1. The outer cylinder 1-1 includes an outer cylinder body 1-1-1 and an outer end plate 1-1-2 installed at one end of the outer cylinder body. One end of the inner cylinder 1-2 is connected to the outer end plate 1-1-2.

[0051] The shear cylinder 2 is a hollow cylindrical shape with one end open. The shear cylinder 2 includes a shear cylinder body 2-1 and a shear cylinder plate 2-2 installed at one end of the shear cylinder body.

[0052] The shear cylinder body 2-1 is sleeved between the outer cylinder body 1-1-1 and the inner cylinder 1-2.

[0053] The shear cylinder 2 further includes a moving pull rod 2-3 coaxially penetrating through the shear cylinder plate 2-2. The moving pull rod 2-3 extends into the inner cylinder 1-2, and a limiting block 2-4 is installed at one end of the moving pull rod 2-3 extending into the inner cylinder 1-2.

[0054] A first connecting plate 2-5 is installed at one end of the moving pull rod 2-3 extending out of the shear cylinder plate 2-2. A fixed connecting rod 1-3 is installed on the side of the outer end plate 1-1-2 facing away from the shear cylinder 2, and a second connecting plate 1-4 is installed on the fixed connecting rod 1-3.

[0055] On the side of the outer cylinder body 1-1-1 facing the inner cylinder 1-2, a first shear groove 3 is circumferentially provided. On the side of the shear cylinder body 2-1 facing the outer cylinder body 1-1-1, a second shear groove 4 is circumferentially provided. The positions of the first shear groove 3 and the second shear groove 4 correspond to each other.

[0056] On the side of the inner cylinder 1-2 facing the limiting block 2-4, a third shear groove 5 is circumferentially provided. On the side of the limiting block 2-4 facing the inner cylinder 1-2, a fourth shear groove 6 is circumferentially provided. The positions of the third shear groove 5 and the fourth shear groove 6 correspond to each other.

[0057] An outer lead ring 7 is arranged in the first shear groove 3 and the second shear groove 4, and an inner lead ring 8 is arranged in the third shear groove 5 and the fourth shear groove 6.

[0058] The outer lead ring 7 includes a first outer lead ring 7-1 installed in the first shear groove 3 and a second outer lead ring 7-2 installed on the side of the first outer lead ring 7-1 facing the shear cylinder 2. The second outer lead ring 7-2 is located in the second shear groove 4 and the axial width of the second outer lead ring 7-2 is less than the width of the second shear groove 4.

[0059] The inner lead ring 8 described above includes a first inner lead ring 8-1 installed in the third shear groove 5 and a second inner lead ring 8-2 installed on the side of the first inner lead ring 8-1 facing the limit block 2-4. The second outer lead ring 7-2 is installed in the fourth shear groove 6 and the axial width of the inner lead ring is equal to the width of the fourth shear groove 6;

[0060] A first return spring 9 is installed between one side of the inner cylinder 1-2 facing the shear cylinder plate 2-2 and the shear cylinder plate 2-2. A second return spring 10 is installed between one side of the shear cylinder body 2-1 facing the outer end plate 1-1-2 and the outer end plate 1-1-2.

[0061] The number of the first return spring 9 and the second return spring 10 can be selected according to different elastic stiffness requirements in specific application scenarios.

[0062] When in use, the device is fixed at two points where displacement needs to be restricted. When an earthquake occurs, the moving pull rod 2-3 drives the shear cylinder 2 to move, and relative displacement occurs between the sleeve 1 and the shear cylinder 2. Relative displacement occurs between the third shear groove 5 provided on the inner cylinder 1-2 and the fourth shear groove 6 provided on the limit block 2-4, driving the inner lead ring 8 arranged in the third shear groove 5 and the fourth shear groove 6 to perform a shear movement, which can effectively dissipate the energy input by the earthquake;

[0063] When the displacement is small, the inner lead ring 8 first undergoes a shear movement. At this time, since relative displacement also occurs between the first shear groove 3 provided on one side of the outer cylinder 1-1-1 facing the inner cylinder 1-2 and the second shear groove 4 provided on one side of the shear cylinder body 2-1 facing the outer cylinder 1-1-1, but since the axial width of the second outer lead ring 7-2 is less than the width of the second shear groove 4, the outer lead ring 7 does not undergo shear when the displacement is small. When the displacement is large, the groove wall of the second shear groove 4 begins to contact the outer lead ring 7. At this time, the outer lead ring 7 and the inner lead ring 8 shear simultaneously to dissipate energy;

[0064] This design avoids the situation of damper damage caused by insufficient damping force under large displacements by increasing the shear area, improves the application range of the lead shear type damper. At the same time, the first return spring 9 and the second return spring 10 will be stretched or compressed. Through the initial pre-pressure or pre-tension of the first return spring 9 and the second return spring 10, the self-resetting function of the damper during and after an earthquake is realized.

[0065] As a preference of this embodiment:

[0066] The first shear groove 3 and the second shear groove 4 have the same axial width, and the axial width of the third shear groove 5 is greater than the axial width of the fourth shear groove 6;

[0067] As a preference of this embodiment:

[0068] The length of the outer cylinder 1-1-1 is greater than the length of the inner cylinder 1-2;

[0069] As a preference of this embodiment:

[0070] A limiting ring 1-5 is further installed on one side of the end of the inner cylinder 1-2 facing the shear cylinder plate 2-2 towards its own axis; to prevent the limiting block 2-4 from disengaging when the displacement is too large.

[0071] Connecting holes 11 are provided on both the first connecting plate 2-5 and the second connecting plate 1-4; the connecting holes 11 facilitate the fixed connection of this device to the installation position.

[0072] The use process of the present invention is as follows:

[0073] S1: Install the first connecting plate 2-5 and the second connecting plate 1-4 at two points where displacement needs to be restricted through the connecting holes 11, and adopt fixed constraints;

[0074] S2: When the relative displacement between the fixed connecting rod 1-3 and the moving pull rod 2-3 is relatively small, the moving pull rod 2-3 moves relative to the inner cylinder 1-2, driving the inner lead ring 8 to shear, and achieving the purpose of energy dissipation through the shear deformation of the inner lead ring 8. At this time, the shear cylinder 2 and the outer lead ring 7 have not yet sheared, and the sleeve 1 and the shear cylinder 2 perform reciprocating motions, as Figure 3 (a) and Figure 4 (a) shown.

[0075] S3: When the relative displacement between the fixed connecting rod 1-3 and the moving pull rod 2-3 is relatively large, the moving pull rod 2-3 continues to move relative to the inner cylinder 1-2. At this time, the shear cylinder 2 starts to enter a shearing motion with the outer lead ring 7. As Figure 3 (b) and Figure 4 (b) shown. The movement of the moving pull rod 2-3 and the shear cylinder 2 will cause the first return spring 9 and the second return spring 10 to deform. Utilize the initial compressive stress or initial tensile stress of the first return spring 9 and the second return spring 10, act on the sleeve 1 and the shear cylinder 2, thereby driving the moving pull rod 2-3 to move in the opposite direction to make it reset. The stiffness and quantity of the first return spring 9 and the second return spring 10 are selected according to the force requirements in actual engineering, and reasonably control the displacement generated by the deformation of the first return spring 9 and the second return spring 10.

[0076] When an earthquake occurs, the damper moves, displacements occur at both the front and rear ends of the damping device, the moving pull rod moves relative to the inner cylinder of the damper to drive the first lead ring to undergo a shearing motion. When the displacement is too large, the shear cylinder connected to the moving pull rod will drive the second lead ring to undergo a shearing motion. By increasing the shearing area, the situation of damper damage caused by insufficient damping force under large displacements is avoided, the application range of the lead-shear type damper is improved. At the same time, the reset spring will be stretched or compressed, and through the initial pre-pressure or pre-tension of the reset spring, the self-resetting function of the damper during and after an earthquake is realized.

[0077] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention without creative efforts are covered by the protection scope of the present invention.

Claims

1. A self-resetting variable damping shear type lead damper, comprising a sleeve (1) and a shear cylinder (2) connected together, characterized in that: The sleeve (1) comprises an outer cylinder (1-1) and an inner cylinder (1-2) coaxially sleeved inside the outer cylinder (1-1); The outer cylinder (1-1) is in the shape of a hollow cylinder with one end open. The shear cylinder (2) is sleeved on the open end of the outer cylinder (1-1). The outer cylinder (1-1) comprises an outer cylinder body (1-1-1) and an outer end plate (1-1-2) installed at one end of the outer cylinder body. One end of the inner cylinder (1-2) is connected to the outer end plate (1-1-2). The shearing cylinder (2) is in the shape of a hollow cylinder with one end open. The shearing cylinder (2) comprises a shearing cylinder body (2-1) and a shearing cylinder plate (2-2) mounted on one end of the shearing cylinder body. The shearing cylinder body (2-1) is sleeved between the outer cylinder body (1-1-1) and the inner cylinder (1-2). The shearing cylinder (2) further comprises a movable pull rod (2-3) coaxially penetrating the shearing cylinder plate (2-2), the movable pull rod (2-3) extending into the inner cylinder (1-2), and a limiting block (2-4) is installed at one end of the movable pull rod (2-3) extending into the inner cylinder (1-2); A first connecting plate (2-5) is installed on one end of the movable pull rod (2-3) extending out of the shear cylinder plate (2-2); a fixed connecting rod (1-3) is installed on the side of the outer end plate (1-1-2) facing away from the shear cylinder (2); and a second connecting plate (1-4) is installed on the fixed connecting rod (1-3); The outer cylinder (1-1-1) is provided with a first shearing groove (3) along the circumferential direction on one side of the inner cylinder (1-2), and the shearing cylinder (2-1) is provided with a second shearing groove (4) along the circumferential direction on one side of the outer cylinder (1-1-1), and the positions of the first shearing groove (3) and the second shearing groove (4) correspond to each other; A third shearing groove (5) is circumferentially formed on the side of the inner cylinder (1-2) facing the limit block (2-4), and a fourth shearing groove (6) is circumferentially formed on the side of the limit block (2-4) facing the inner cylinder (1-2), and the positions of the third shearing groove (5) and the fourth shearing groove (6) correspond to each other; An outer lead ring (7) is arranged in the first shear groove (3) and the second shear groove (4), and an inner lead ring (8) is arranged in the third shear groove (5) and the fourth shear groove (6); The outer lead ring (7) comprises a first outer lead ring (7-1) installed in the first shear groove (3) and a second outer lead ring (7-2) installed on the side of the first outer lead ring (7-1) facing the shear cylinder (2), the second outer lead ring (7-2) is located in the second shear groove (4) and the axial width of the second outer lead ring (7-2) is smaller than the width of the second shear groove (4); The inner lead ring (8) comprises a first inner lead ring (8-1) installed in the third shear groove (5) and a second inner lead ring (8-2) installed on the side of the first inner lead ring (8-1) facing the limit block (2-4); the second outer lead ring (7-2) is installed in the fourth shear groove (6) and the axial width of the inner lead ring (8) is equal to the width of the fourth shear groove (6); A first return spring (9) is installed between the side of the inner cylinder (1-2) facing the shear cylinder plate (2-2) and the shear cylinder plate (2-2), and a second return spring (10) is installed between the side of the shear cylinder body (2-1) facing the outer end plate (1-1-2) and the outer end plate (1-1-2).

2. The self-resetting variable damping shear type lead damper according to claim 1, characterized in that: The first shearing groove (3) and the second shearing groove (4) have the same width in the axial direction, and the third shearing groove (5) has a width in the axial direction that is greater than the width of the fourth shearing groove (6) in the axial direction.

3. The self-resetting variable damping shear type lead damper according to claim 1, characterized in that: The length of the outer cylinder (1-1-1) is greater than the length of the inner cylinder (1-2).

4. The self-resetting variable damping shear type lead damper according to claim 1, characterized in that: A limiting ring (1-5) is also installed on the side of the inner cylinder (1-2) facing its own axis at one end thereof facing the shearing cylinder plate (2-2).

5. The self-resetting variable damping shear type lead damper according to claim 1, characterized in that: The first connecting plate (2-5) and the second connecting plate (1-4) are both provided with connecting holes (11).

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