A self-resetting multi-dimensional seismic isolation bearing

Abstract

The present invention relates to a self-resetting multi-dimensional seismic isolation bearing, comprising a seismic isolation main body mechanism, a double-tube hydraulic damping shock absorbing mechanism, a horizontal self-resetting mechanism, and a friction pendulum inner slider supporting mechanism; the seismic isolation bearing adopts a spring sheet group for vertical isolation, which reduces the vertical stiffness of the structure, increases the vertical natural vibration period of the structure, and can effectively isolate low-frequency vertical earthquakes; the internally installed double-tube hydraulic damping shock absorbing mechanism can realize the consumption of vertical seismic energy; the horizontal seismic isolation bearing adopts a friction pendulum, which consumes horizontal seismic energy through the friction between the inner slider and the base on the basis of effectively isolating low-frequency horizontal earthquakes. The self-resetting multi-dimensional seismic isolation bearing of the present invention has simple parts and is easy to assemble; it has horizontal and vertical limiting and horizontal self-resetting functions, which reduce the damage to the seismic isolation bearing caused by earthquakes and facilitate post-earthquake maintenance; and it has good pull-out resistance. The self-resetting multi-dimensional seismic isolation bearing of the present invention can be used for seismic isolation control of building structures.

Description

Technical Field

[0001] The present invention relates to the technical field of building structure vibration reduction and isolation control, and in particular to a self-resetting multi-dimensional vibration reduction and isolation bearing. Background Art

[0002] Seismic isolation is a way for building structures to control seismic motion. It prevents seismic motion from being transmitted to the upper building structure by adding a seismic isolation layer between the foundation and the upper building structure. The principle of structural seismic isolation is to reduce the overall stiffness of the upper building structure through the low stiffness of the seismic isolation bearing, extend the natural vibration period of the upper building structure, stagger the natural vibration period of the upper building structure with the dominant period of the earthquake action, reduce the seismic energy input to the upper building structure, thereby reducing the seismic response of the structure itself, reducing the damage to the upper building structure caused by the earthquake, and reducing the risk of building collapse in an earthquake. As a vibration with random directions, earthquakes have not only horizontal components but also vertical components, and both have the same destructive power on building structures. Therefore, it is very necessary to consider the multidimensionality of seismic motion when designing seismic isolation bearings.

[0003] Multi-dimensional seismic isolation bearings should have the following characteristics: (1) Seismic isolation bearings should be easy to install and have good stability; (2) Seismic isolation bearings should have vertical pull-out resistance; (3) Seismic isolation bearings should be able to isolate horizontal and vertical earthquakes at the same time; (4) Seismic isolation bearings should be able to reset themselves after small or medium earthquakes; (5) Seismic isolation bearings should have low stiffness to ensure effective isolation of low-frequency seismic motions; (6) Seismic isolation bearings should have damping devices in both horizontal and vertical directions to consume seismic energy.

[0004] Existing multi-dimensional seismic isolation bearings mostly use a method of connecting horizontal seismic isolation devices in series with vertical seismic isolation devices. Among them, the horizontal seismic isolation devices commonly used in engineering include laminated rubber seismic isolation bearings, friction pendulum bearings, etc. Laminated rubber seismic isolation bearings and friction pendulum bearings have good horizontal seismic isolation effects, but do not have vertical seismic isolation functions. In particular, friction pendulum bearings are prone to sliding surface separation under vertical vibrations; vertical seismic isolation devices include disc springs, etc., but due to the large stiffness of disc springs, the seismic isolation effect of low-frequency seismic motions under vertical seismic motions is not good. In addition, existing self-resetting devices mainly use nickel-titanium shape memory alloys, etc., but nickel-titanium shape memory alloys are expensive and will increase the cost of seismic isolation bearings. The existence of the above problems has imposed certain constraints on the application of seismic isolation technology. Therefore, it is necessary to design a new type of self-resetting seismic isolation bearing to solve the above problems. Summary of the Invention

[0005] In view of the technical deficiencies of the above-mentioned existing seismic isolation bearings, such as the friction pendulum easily separating the sliding surface under vertical vibration, the disc spring having poor vertical seismic isolation effect, and the high price of the self-resetting device, a self-resetting multi-dimensional seismic isolation bearing is provided to effectively reduce the damage caused by earthquake motion to the upper building structure.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A self-resetting multi-dimensional seismic isolation support, comprising a seismic isolation main body mechanism, a double-tube hydraulic damping shock absorbing mechanism, a horizontal self-resetting mechanism, and a friction pendulum inner slider supporting mechanism;

[0008] The seismic isolation main body mechanism includes a support plate, a vertical seismic isolation guide cylinder, a vertical seismic isolation spring plate group, a flange group, a vertical seismic isolation lining-friction pendulum base integrated component, a friction pendulum anti-pullout sleeve and a friction pendulum inner slider; the support plates are respectively located at the top and bottom of the seismic isolation support, and are respectively connected to the upper building structure and the foundation; the vertical seismic isolation guide cylinder is nested in the outer side of the vertical seismic isolation lining part corresponding to the vertical seismic isolation lining-friction pendulum base integrated component, and one end of the vertical seismic isolation guide cylinder is connected to the corresponding support plate; the flange group is located between the vertical seismic isolation lining-friction pendulum base integrated component and the corresponding support plate, and the flange group consists of an annular flange and a circular flange, and the annular method The flange is connected to the vertical seismic isolation lining portion of the corresponding vertical seismic isolation lining-friction pendulum base integrated component, and the circular flange is connected to the corresponding support plate; the vertical seismic isolation spring sheet group is located between the circular flange and the corresponding annular flange; the friction pendulum base portion of the vertical seismic isolation lining-friction pendulum base integrated component is embedded in the corresponding friction pendulum anti-pullout sleeve, and the side and bottom of the friction pendulum base portion are respectively connected to the side and bottom of the corresponding friction pendulum anti-pullout sleeve; the two ends of the friction pendulum inner slider are respectively located in the cavity formed by the friction pendulum base portion and the corresponding friction pendulum anti-pullout sleeve, and the outer surfaces of the two ends of the friction pendulum inner slider are both arc sliding surfaces that cooperate with the corresponding friction pendulum base portion;

[0009] The double-tube hydraulic damping shock absorbing mechanism is located in the receiving groove of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component; one end of the double-tube hydraulic damping shock absorbing mechanism is fixedly connected to the corresponding circular flange, and the other end is fixedly connected to the bottom of the receiving groove of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component;

[0010] The horizontal self-resetting mechanism is located between the outer edges of both ends of the friction pendulum inner slider and the inner wall of the friction pendulum base portion corresponding to the vertical seismic isolation liner-friction pendulum base integrated component; one end of the horizontal self-resetting mechanism is fixedly connected to the inner wall of the friction pendulum base portion, and the other end abuts against the outer edge of the friction pendulum inner slider, so that the friction pendulum inner slider can slide freely;

[0011] The supporting mechanism of the inner slider of the friction pendulum is located between the inner surfaces of the two ends of the inner slider of the friction pendulum and the corresponding anti-pullout sleeve of the friction pendulum, so that the outer surfaces of the two ends of the inner slider of the friction pendulum always keep in contact with the corresponding friction pendulum base.

[0012] Furthermore, the vertical seismic isolation guide cylinder includes a plurality of seismic isolation guide blocks, each of which is provided with ear plates on both sides, and each adjacent two seismic isolation guide blocks are connected and fixed by bolts and nuts.

[0013] Furthermore, the vertical seismic isolation spring sheet group includes a plurality of arc-shaped spring sheets 1, and both ends of each of the arc-shaped spring sheets 1 are respectively snapped into the corresponding snap grooves of the circular flange and the annular flange and fixed.

[0014] Furthermore, an outer convex ring is provided on the outer side surface of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component, and a limiting groove cooperating with the outer convex ring is opened on the inner side surface of the vertical seismic isolation guide cylinder, and the outer convex ring is embedded in the limiting groove.

[0015] Furthermore, the inner slider of the friction pendulum includes an upper slider, a lower slider, a pin self-locking assembly and a polytetrafluoroethylene plate; the cylindrical key of the upper slider is embedded in the cylindrical groove of the lower slider, and the two are fixed by the pin self-locking assembly; the polytetrafluoroethylene plate is respectively placed on the arc sliding surface of the upper slider and the lower slider and bonded by epoxy resin.

[0016] Furthermore, the pin self-locking assembly includes multiple groups of pin self-locking blocks; each group of the pin self-locking blocks includes two return springs and a pin; one end of the return spring is fixed to the pin, and the other end is fixed to the bottom of the rectangular groove of the cylindrical key of the upper slider, and the two return springs are symmetrically arranged up and down along the horizontal center line of the rectangular groove; the pin can slide freely in the rectangular groove, and the tenon of the pin can slide freely in the square limiting groove of the cylindrical key of the upper slider; the surface of the pin that cooperates with the cylindrical groove of the lower slider is an arc surface, the diameter of the arc surface of the pin is the same as the inner diameter of the cylindrical groove of the lower slider, and the thickness of the pin is the same as the depth of the square limiting groove of the cylindrical key of the upper slider.

[0017] Furthermore, the double-tube hydraulic damping shock absorbing mechanism includes a piston sleeve, a piston rod, a working cylinder, and an oil storage cylinder. The piston sleeve is sleeved on the oil storage cylinder, the working cylinder is located in the oil storage cylinder, and an oil storage cylinder upper cover and an oil storage cylinder bottom cover are respectively provided at both ends of the oil storage cylinder. One end of the piston rod is connected to the piston sleeve, and the other end of the piston rod extends into the working cylinder. A piston guide groove, an oil seal gasket, and a rubber oil seal are provided on the inner side between the working cylinder and the oil storage cylinder upper cover, and an upper support base foot, an upper support base, and a rubber sealing ring are provided on the outer side. The upper support base, the upper support base foot, the working cylinder, the piston guide groove, and the oil seal gasket are welded to form an assembly unit.

[0018] The end of the piston rod located in the working cylinder is provided with a piston compression limiter, a piston compression spring, a piston compression valve plate, a piston, a piston compensating valve plate, a piston compensating support, a piston compensating limiter, a gasket, and a nut in sequence from top to bottom. The piston compression valve plate corresponds to the outer hole of the piston, and the piston compensating valve plate corresponds to the inner hole of the piston. An upper chamber is formed in the working cylinder above the piston, and an upper chamber is formed in the working cylinder below the piston; a base compensation limiter, a base compensation spring, a base compensation valve plate, a base, a base compression valve plate, a base compression support, a base compression limiter, a gasket, and a nut are provided between the working cylinder and the bottom cover of the oil storage cylinder from top to bottom. The base compensation valve plate corresponds to the outer hole of the base, and the base compression valve plate corresponds to the inner hole of the base; the working cylinder is filled with hydraulic oil, and the oil storage cylinder is filled with nitrogen and the compensating hydraulic oil of the working cylinder.

[0019] Furthermore, a rebound stopper is provided on the piston rod, a flow-blocking rubber ring is provided between the piston and the inner wall of the working cylinder, and a lower support seat of the support base is provided on the inner wall of the bottom cover of the oil storage cylinder.

[0020] Furthermore, the horizontal self-resetting mechanism includes multiple groups of horizontal self-resetting blocks, each group of the horizontal self-resetting blocks includes a baffle, two reset springs 2 and a base; one end of the reset spring 2 is fixed to the baffle, and the other end is fixed to the base, and the two reset springs 2 are arranged symmetrically along the vertical center line of the baffle; the tenon of the baffle is embedded in the tenon groove of the base, so that the baffle can slide freely on the base and can return to its original position under the action of the reset spring 2.

[0021] Furthermore, the friction pendulum inner slider supporting mechanism includes a friction pendulum inner slider supporting tray and a supporting spring sheet group; the friction pendulum inner slider supporting tray can slide freely between the inner surface of the friction pendulum inner slider; each group of the supporting spring sheet group includes a plurality of arc-shaped spring sheets 2; one end of the arc-shaped spring sheet 2 is fixedly inserted into the groove of the friction pendulum anti-pullout sleeve, and the other end is fixedly inserted into the groove of the friction pendulum inner slider supporting tray.

[0022] The advantages and positive effects of the present invention are:

[0023] The self-resetting multi-dimensional seismic isolation bearing of the present invention realizes horizontal and vertical seismic isolation of the seismic isolation bearing through the combination of a spring leaf group and a friction pendulum; solves the problem of sliding surface separation of the traditional friction pendulum base during vertical vibration through the slider support mechanism inside the friction pendulum; better realizes the consumption of vertical seismic energy through the double-tube hydraulic damping shock-absorbing mechanism, thereby achieving the purpose of reducing vertical seismic damage; realizes the horizontal self-resetting function by replacing the memory alloy with a new horizontal self-resetting mechanism, reduces costs while ensuring the reliability and stability of the horizontal self-resetting mechanism, and facilitates later maintenance; realizes the fixation of the upper and lower sliders through the pin self-locking assembly, reduces the difficulty of assembling the seismic isolation bearing, and has a simple structure and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the self-resetting multi-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0025] Figure 2 1. It is an overall top view of a self-resetting multi-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0026] Figure 3 1 is a schematic front cross-sectional view of the entirety of a self-resetting multi-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the split structure of the self-resetting multi-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the disassembled structure of the double-tube hydraulic damping shock absorbing mechanism provided in an embodiment of the present invention;

[0029] Figure 6 1 is a schematic diagram of a half-section structure of a piston provided by an embodiment of the present invention;

[0030] Figure 7 1 is a schematic diagram of the disassembled structure of the inner slider of the friction pendulum provided by an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the overall structure of the pin self-locking assembly provided by an embodiment of the present invention;

[0032] Figure 9 1 is a schematic diagram of the split structure of the horizontal self-resetting mechanism provided by an embodiment of the present invention;

[0033] Figure 10 It is a schematic diagram of the disassembled structure of the supporting mechanism of the inner slider of the friction pendulum provided by an embodiment of the present invention.

[0034] In the picture:

[0035] 110. Support plate; 120. Vertical seismic isolation guide cylinder; 121. Seismic isolation guide assembly; 130. Vertical seismic isolation spring plate assembly; 131. Arc spring plate 1; 140. Flange assembly; 141. Circular flange; 142. Annular flange; 150. Vertical seismic isolation liner-friction pendulum base integrated component; 160. Friction pendulum anti-pullout sleeve; 170. Friction pendulum inner slider; 171. Upper slider; 172. Lower slider; 173. Pin self-locking assembly; 173-1. Pin self-locking assembly; 173-1a. Pin; 173-1b. Return spring 1; 174. Polytetrafluoroethylene plate;

[0036] 200, double-tube hydraulic damping shock absorption mechanism; 201, piston sleeve; 202, piston rod; 203, working cylinder; 204, oil storage cylinder; 205, oil storage cylinder cover; 206, piston guide groove; 207, rubber oil seal; 208, oil seal gasket; 209, rubber sealing ring; 210, upper support base foot; 211, upper support base; 212, rebound stopper; 213, piston; 214, piston compression limiter; 215, piston compression valve plate; 2 16. Piston compression spring; 217. Flow-blocking rubber ring; 218. Piston compensating valve disc; 219. Piston compensating support; 220. Piston compensating limiter; 221. Base compensating limiter; 222. Base; 223. Base compensating valve disc; 224. Base compensating spring; 225. Base compression valve disc; 226. Base compression support; 227. Base compression limiter; 228. Washer; 229. Nut; 230. Lower support seat; 231. Oil storage cylinder bottom cover;

[0037] 300, horizontal self-reset mechanism; 310, horizontal self-reset assembly; 311, baffle; 312, reset spring 2; 313, base;

[0038] 400, friction pendulum inner slider supporting mechanism; 410, friction pendulum inner slider supporting tray; 420, supporting spring leaf assembly; 421, arc-shaped spring leaf 2;

[0039] 511, M10 stud; 512, M10 nut; 513, spring washer; 521, M10 bolt; 522, M10 nut; 523, washer; 531, M10 bolt; 532, M10 nut; 533, washer; 541, M10 stud; 542, M10 nut; 543, spring washer; 551, M10 stud; 552, M10 nut; 553, spring washer; 561, M20 stud; 562, M20 nut; 563, spring washer. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] See also Figures 1 to 10 This embodiment provides a self-resetting multi-dimensional seismic isolation bearing, including: a seismic isolation main body mechanism, a double-tube hydraulic damping shock absorbing mechanism 200, a horizontal self-resetting mechanism 300 and a friction pendulum inner slider supporting mechanism 400.

[0044] The isolation main body mechanism includes a support plate 110, a vertical isolation guide cylinder 120, a vertical isolation spring plate group 130, a flange group 140, a vertical isolation liner-friction pendulum base integrated component 150, a friction pendulum anti-pullout sleeve 160 and a friction pendulum inner slider 170.

[0045] The support plates 110 are respectively located at the top and bottom of the seismic isolation support, and their function is to connect the upper building structure and the foundation so that the two are fixed together; the vertical seismic isolation guide cylinder 120 is nested in the outer side of the vertical seismic isolation lining part of the vertical seismic isolation lining-friction pendulum base integrated component 150, and one end of the vertical seismic isolation guide cylinder 120 is fastened to the corresponding support plate 110 through 4 groups, 5 M10 studs 511 and M10 nuts 512 in each group to achieve assembly, and a spring washer 513 is provided at the bottom of each M10 nut 512; the flange group 140 is located between the vertical seismic isolation lining-friction pendulum base integrated component 150 and the corresponding support plate 110, and its function is to connect the vertical seismic isolation spring sheet group 130 and the corresponding The vertical seismic isolation guide cylinder 120 and the vertical seismic isolation lining-friction pendulum base integrated component 150 form a vertical seismic isolation system. The flange group 140 consists of an annular flange 142 and a circular flange 141. The annular flange 142 and the vertical seismic isolation lining portion corresponding to the vertical seismic isolation lining-friction pendulum base integrated component 150 are fastened and assembled by 8 M10 studs 541 and M10 nuts 542. A spring washer 543 is provided at the bottom of each M10 nut 542. The circular flange 141 and the corresponding support plate 110 are fastened and assembled by 8 M10 bolts 521 and M10 nuts 522. A washer 523 is provided at the bottom of each M10 nut 522. The vertical seismic isolation spring sheet group 130 is located between the circular flange 141 and the corresponding annular flange 142. Its function is to reduce the vertical stiffness of the structure as a whole, increase the vertical natural vibration period of the structure, and thus avoid the dominant period of low-frequency earthquakes, thereby achieving effective vertical isolation of low-frequency earthquakes; the friction pendulum base part of the vertical seismic isolation lining-friction pendulum base integrated component 150 is embedded in the corresponding friction pendulum anti-pullout sleeve 160, and the side of the friction pendulum base part and the side of the corresponding friction pendulum anti-pullout sleeve 160 are fastened and assembled through 8 groups, 2 M10 studs 551 and M10 nuts 552 in each group. A spring washer 553 is provided at the bottom of each M10 nut 552, and the bottom of the friction pendulum base part is connected to the corresponding friction pendulum anti-pullout sleeve 160. The bottom of the extraction cover 160 is assembled by fastening with 8 M20 studs 561 and M20 nuts 562, and a spring washer 563 is provided under each M20 nut 562; the two ends of the friction pendulum inner slider 170 are respectively located in the cavity formed by the friction pendulum base and the corresponding friction pendulum anti-extraction sleeve 160, and its function is to reduce the horizontal stiffness of the entire structure, increase the horizontal natural vibration period of the structure, and thus avoid the dominant period of low-frequency earthquakes, and achieve effective horizontal isolation of low-frequency earthquakes; in addition, the outer surfaces of both ends of the friction pendulum inner slider 170 are circular arc sliding surfaces that cooperate with the friction pendulum base. The friction between the circular arc sliding surface and the corresponding friction pendulum base can realize the consumption of horizontal earthquake energy and achieve a shock-absorbing effect.

[0046] The double-cylinder hydraulic damping shock absorbing mechanism 200 is located in the accommodating groove of the vertical seismic isolation lining part of the vertical seismic isolation lining-friction pendulum base integrated component 150; one end of the double-cylinder hydraulic damping shock absorbing mechanism 200 is connected to the corresponding circular flange 141 by welding, and the other end is connected to the bottom of the accommodating groove of the vertical seismic isolation lining part of the vertical seismic isolation lining-friction pendulum base integrated component 150 by welding.

[0047] The horizontal self-resetting mechanism 300 is located between the outer edges of both ends of the friction pendulum inner slider 170 and the inner wall of the friction pendulum base portion corresponding to the vertical seismic isolation lining-friction pendulum base integrated component 150; one end of the horizontal self-resetting mechanism 300 is connected to the inner wall of the friction pendulum base portion of the vertical seismic isolation lining-friction pendulum base integrated component 150 by welding, and the other end abuts against the outer edge of the friction pendulum inner slider 170, so that the friction pendulum inner slider 170 can slide freely. Its function is to enable the friction pendulum inner slider 170 to automatically reset to its initial position after a small or medium earthquake, which is convenient for later maintenance.

[0048] The friction pendulum inner slider supporting mechanism 400 is located between the inner surfaces of the two ends of the friction pendulum inner slider 170 and the corresponding friction pendulum anti-pullout sleeve 160. Its function is to ensure that the arc sliding surface of the friction pendulum inner slider 170 and the friction pendulum base are always in contact during the use of the shock-isolating bearing, so as to avoid the two from separating from each other during vibration, causing failure of the friction pendulum system.

[0049] More specifically, the vertical seismic isolation guide cylinder 120 is composed of four seismic isolation guide blocks 121, each of which is provided with ear plates on both sides, and the edges of the ear plate joints are reinforced by welding, and each adjacent two seismic isolation guide blocks 121 are connected and fixed by 5 M10 bolts 531 and M10 nuts 532 for assembly, and a washer 533 is provided at the bottom of each M10 nut 532.

[0050] The vertical seismic isolation spring sheet group 130 is composed of 12 arc-shaped spring sheets 131 ; both ends of each arc-shaped spring sheet 131 are respectively snapped into the corresponding slots of the circular flange 141 and the annular flange 142 and fixed.

[0051] The outer side surface of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component 150 is provided with an outer convex ring, and the inner side surface of the vertical seismic isolation guide cylinder 120 is provided with a limiting groove that cooperates with the outer convex ring. The outer convex ring is embedded in the limiting groove of the vertical seismic isolation guide cylinder 120 to play the role of anti-pullout and limiting during vertical vibration.

[0052] The inner slider 170 of the friction pendulum includes an upper slider 171, a lower slider 172, a pin self-locking assembly 173 and a polytetrafluoroethylene plate 174; the columnar key of the upper slider 171 is embedded in the columnar groove of the lower slider 172, and the two are fixed by the pin self-locking assembly 173; the polytetrafluoroethylene plate 174 is respectively placed on the arc sliding surface of the upper slider 171 and the lower slider 172 and bonded with epoxy resin to ensure that the polytetrafluoroethylene plate 174 is not separated from the upper slider 171 and the lower slider 172 when the seismic isolation bearing is in use.

[0053] The pin self-locking assembly 173 is composed of four groups of pin self-locking blocks 173-1; each group of the pin self-locking blocks 173-1 includes two return springs 173-1b and a pin 173-1a; one end of the return spring 173-1b is fixed to the pin 173-1a, and the other end is fixed to the bottom of the rectangular groove of the columnar key of the upper slider 171, and the two return springs 173-1b are symmetrically arranged up and down along the horizontal center line of the rectangular groove of the columnar key of the upper slider 171; the pin 1 73-1a can slide freely within the rectangular groove of the cylindrical key of the upper slider 171, and the tenon of the pin 173-1a can slide freely within the square limiting groove of the cylindrical key of the upper slider 171. The surface of the pin 173-1a that cooperates with the cylindrical groove of the lower slider 172 is an arc surface. The diameter of the arc surface of the pin 173-1a is the same as the inner diameter of the cylindrical groove of the lower slider 172, and the thickness of the pin 173-1a is the same as the depth of the square limiting groove of the cylindrical key of the upper slider 171. During installation, the pin 173-1a is pressed into the rectangular groove of the cylindrical key of the upper slider 171. When the cylindrical key of the upper slider 171 is inserted into the cylindrical groove of the lower slider 172 and falls into place, the pin 173-1a is rebounded into the rectangular groove of the lower slider 172 under the action of the return spring 173-1b, achieving self-locking fixation.

[0054] The double-tube hydraulic damping shock absorbing mechanism 200 includes a piston sleeve 201, a piston rod 202, a working cylinder 203, an oil storage cylinder 204, an oil storage cylinder upper cover 205, a piston guide groove 206, a rubber oil seal 207, an oil seal gasket 208, a rubber sealing ring 209, an upper support base foot 210, an upper support base 211, a rebound block 212, a piston 213, a piston compression limiter 214, a piston compression valve disc 215, a piston compression spring 216, a flow-blocking rubber ring 217, a piston compensation valve disc 218, a piston compensation support 219, a piston compensation limiter 220, a base compensation limiter 221, a base 222, a base compensation valve disc 223, a base compensation spring 224, a base compression valve disc 225, a base compression support 226, a base compression limiter 227, a washer 228, a nut 229, a lower support base 230, and an oil storage cylinder bottom cover 231.

[0055] The piston sleeve 201 is sleeved on the oil storage cylinder 204, and the working cylinder 203 is located in the oil storage cylinder 204. The two ends of the oil storage cylinder 204 are respectively provided with an oil storage cylinder cover 205 and an oil storage cylinder bottom cover 231. One end of the piston rod 202 is connected to the piston sleeve 201, and the other end of the piston rod 202 extends into the working cylinder 203; a piston guide groove 206, an oil seal gasket 208, and a rubber oil seal 207 are provided on the inner side between the working cylinder 203 and the oil storage cylinder cover 205, and an upper support base foot 210, an upper support base 211, and a rubber sealing ring 209 are provided on the outer side. The upper support base 211, the upper support base foot 210, the working cylinder 203, the piston guide groove 206 and the oil seal gasket 208 are welded to form an assembly unit;

[0056] The end of the piston rod 202 located in the working cylinder 203 is provided with a piston compression limiter 214, a piston compression spring 216, a piston compression valve plate 215, a piston 213, a piston compensation valve plate 218, a piston compensation support 219, a piston compensation limiter 220, a gasket 228, and a nut 229 in sequence from top to bottom. The piston compression valve plate 215 corresponds to the outer hole of the piston 213, and the piston compensation valve plate 218 corresponds to the inner hole of the piston 213. In this embodiment, the outer hole of the piston is connected to the groove opened on the outer side surface of the lower part of the piston. When working, the hydraulic oil can flow into the outer hole from the outer edge of the lower part of the piston. An upper chamber is formed in the working cylinder 203 above the piston 213, and an upper chamber is formed in the working cylinder 203 below the piston 213; a base compensation limit 221, a base compensation spring 224, a base compensation valve plate 223, a base 222, a base compression valve plate 225, a base compression support 226, a base compression limit 227, a washer 228, and a nut 229 are arranged between the working cylinder 203 and the bottom cover 231 of the oil storage cylinder from top to bottom. The base compensation valve plate 223 corresponds to the outer hole of the base 222, and the base compression valve plate 225 corresponds to the inner hole of the base 222.

[0057] A rebound stopper 212 is provided on the piston rod 202 , a flow-blocking rubber ring 217 is provided between the piston 213 and the inner wall of the working cylinder 203 , and a lower support seat 230 of the support base 222 is provided on the inner wall of the oil storage cylinder bottom cover 231 .

[0058] Before use, the working cylinder 203 is filled with hydraulic oil, and the oil storage cylinder 204 is filled with nitrogen and compensation hydraulic oil for the working cylinder 203. When the piston rod 202 is pressed downward, the piston compression spring 216 is compressed by the liquid pressure in the lower chamber of the working cylinder 203, and the piston compression valve plate 215 is lifted, allowing the liquid to flow from the outer hole of the piston 213 into the upper chamber of the working cylinder 203. At the same time, the base compression valve plate 225 is opened by the liquid pressure in the lower chamber of the working cylinder 203, allowing the liquid in the lower chamber of the working cylinder 203 to flow from the inner hole of the base 222 into the chamber of the oil storage cylinder 204. During this process, the liquid in the lower chamber of the working cylinder 203 is subject to liquid viscous resistance during flow, and the nitrogen in the oil storage cylinder 204 is compressed. Both of these consume the input vertical seismic energy, thereby achieving a shock absorption effect. When the piston rod 202 is lifted, the piston compensation valve plate 218 is opened by the liquid pressure in the upper chamber of the working cylinder 203, so that the liquid in the upper chamber of the working cylinder 203 flows from the inner hole of the piston 213 into the lower chamber of the working cylinder 203; at the same time, the base compensation spring 224 is compressed by the liquid pressure in the chamber of the oil storage cylinder 204, and the base compensation valve plate 223 is lifted so that the liquid in the chamber of the oil storage cylinder 204 flows from the outer hole of the base 222 into the lower chamber of the working cylinder 203. Similarly, in this process, the liquid in the upper chamber of the working cylinder 203 and the liquid in the chamber of the oil storage cylinder 204 are subject to liquid viscous resistance during the flow process, consuming the input vertical seismic energy, thereby achieving a shock absorption effect.

[0059] The horizontal self-resetting mechanism 300 includes 8 groups of horizontal self-resetting blocks 310, each group of the horizontal self-resetting blocks 310 includes a baffle 311, two reset springs 312 and a base 313; the tenon of the baffle 311 is embedded in the tenon groove of the base 313, and the baffle 311 can slide freely on the base 313; one end of the reset spring 312 is fixed to the baffle 311, and the other end is fixed to the base 313, and the two reset springs 312 are arranged symmetrically along the vertical center line of the baffle 311; the baffle 311 can return to its original position under the action of the reset spring 312.

[0060] The friction pendulum inner slider supporting mechanism 400 includes a friction pendulum inner slider supporting tray 410 and a supporting spring sheet group 420; the friction pendulum inner slider supporting tray 410 can slide freely with the inner surface of the friction pendulum inner slider 170; the supporting spring sheet group 420 consists of 8 groups, each group of three arc-shaped spring sheets 421; one end of the arc-shaped spring sheet 421 is fixedly inserted into the groove of the friction pendulum anti-pullout sleeve 160, and the other end is fixedly inserted into the groove of the friction pendulum inner slider supporting tray 410; the friction pendulum inner slider supporting tray 410 can return to its original position under the action of the supporting spring sheet group 420.

[0061] To sum up, the self-resetting multi-dimensional seismic isolation bearing of the present invention realizes horizontal and vertical seismic isolation of the seismic isolation bearing through the combination of a spring leaf group and a friction pendulum; solves the problem of sliding surface separation of the traditional friction pendulum base during vertical vibration through the slider support mechanism inside the friction pendulum; better realizes the consumption of vertical seismic energy through the double-tube hydraulic damping shock-absorbing mechanism, thereby achieving the purpose of reducing vertical seismic damage; realizes the horizontal self-resetting function by replacing the memory alloy with a new horizontal self-resetting mechanism, reduces costs while ensuring the reliability and stability of the horizontal self-resetting mechanism, and facilitates later maintenance; realizes the fixation of the upper and lower sliders through the pin self-locking assembly, reduces the difficulty of assembling the seismic isolation bearing, and has a simple structure and convenient maintenance.

[0062] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A self-resetting multi-dimensional seismic isolation bearing, characterized in that: It includes a seismic isolation main body mechanism, a double-tube hydraulic damping shock absorption mechanism, a horizontal self-resetting mechanism and a friction pendulum inner slider supporting mechanism; The isolation main body mechanism includes a support plate, a vertical isolation guide cylinder, a vertical isolation spring plate group, a flange group, a vertical isolation liner-friction pendulum base integrated component, a friction pendulum anti-pullout sleeve cover and a friction pendulum inner slider; The support plates are respectively located at the top and bottom of the seismic isolation support, and are respectively connected to the upper building structure and the foundation; the vertical seismic isolation guide cylinder is nested in the outer side of the vertical seismic isolation lining part corresponding to the vertical seismic isolation lining-friction pendulum base integrated component, and one end of the vertical seismic isolation guide cylinder is connected to the corresponding support plate; the flange group is located between the vertical seismic isolation lining-friction pendulum base integrated component and the corresponding support plate, and the flange group consists of an annular flange and a circular flange, and the annular flange is connected to the vertical seismic isolation lining part corresponding to the vertical seismic isolation lining-friction pendulum base integrated component. , the circular flange is connected to the corresponding support plate; the vertical seismic isolation spring sheet group is located between the circular flange and the corresponding annular flange; the friction pendulum base portion of the vertical seismic isolation liner-friction pendulum base integrated component is embedded in the corresponding friction pendulum anti-pullout sleeve, and the side and bottom of the friction pendulum base portion are respectively connected to the side and bottom of the corresponding friction pendulum anti-pullout sleeve; the two ends of the friction pendulum inner slider are respectively located in the cavity formed by the friction pendulum base portion and the corresponding friction pendulum anti-pullout sleeve, and the outer surfaces of the two ends of the friction pendulum inner slider are both arc sliding surfaces that cooperate with the corresponding friction pendulum base portion; The double-tube hydraulic damping shock absorbing mechanism is located in the receiving groove of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component; one end of the double-tube hydraulic damping shock absorbing mechanism is fixedly connected to the corresponding circular flange, and the other end is fixedly connected to the bottom of the receiving groove of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component; The double-tube hydraulic damping shock absorbing mechanism includes a piston sleeve, a piston rod, a working cylinder and an oil storage cylinder. The piston sleeve is sleeved on the oil storage cylinder, the working cylinder is located in the oil storage cylinder, and an oil storage cylinder upper cover and an oil storage cylinder bottom cover are respectively provided at both ends of the oil storage cylinder. One end of the piston rod is connected to the piston sleeve, and the other end of the piston rod extends into the working cylinder; a piston guide groove, an oil seal gasket and a rubber oil seal are provided on the inner side between the working cylinder and the oil storage cylinder upper cover, and an upper support base foot, an upper support base and a rubber sealing ring are provided on the outer side; the upper support base, the upper support base foot, the working cylinder, the piston guide groove and the oil seal gasket are welded to form an assembly unit; The end of the piston rod located in the working cylinder is provided with a piston compression limiter, a piston compression spring, a piston compression valve plate, a piston, a piston compensating valve plate, a piston compensating support, a piston compensating limiter, a gasket, and a nut in sequence from top to bottom. The piston compression valve plate corresponds to the outer hole of the piston, and the piston compensating valve plate corresponds to the inner hole of the piston. An upper chamber is formed in the working cylinder above the piston, and an upper chamber is formed in the working cylinder below the piston; a base compensating limiter, a base compensating spring, a base compensating valve plate, a base, a base compression valve plate, a base compression support, a base compression limiter, a gasket, and a nut are provided between the working cylinder and the bottom cover of the oil storage cylinder from top to bottom. The base compensating valve plate corresponds to the outer hole of the base, and the base compression valve plate corresponds to the inner hole of the base; the working cylinder is filled with hydraulic oil, and the oil storage cylinder is filled with nitrogen and the compensating hydraulic oil of the working cylinder; The horizontal self-resetting mechanism is located between the outer edges of both ends of the friction pendulum inner slider and the inner wall of the friction pendulum base portion corresponding to the vertical seismic isolation liner-friction pendulum base integrated component; one end of the horizontal self-resetting mechanism is fixedly connected to the inner wall of the friction pendulum base portion, and the other end abuts against the outer edge of the friction pendulum inner slider, so that the friction pendulum inner slider can slide freely; The horizontal self-reset mechanism includes multiple groups of horizontal self-reset blocks, each group of the horizontal self-reset blocks includes a baffle, two return springs 2, and a base; one end of the return spring 2 is fixed to the baffle, and the other end is fixed to the base, and the two return springs 2 are arranged symmetrically along the vertical center line of the baffle; the tenon of the baffle is embedded in the tenon groove of the base, so that the baffle can slide freely on the base and can return to its original position under the action of the return spring 2; The supporting mechanism of the inner slider of the friction pendulum is located between the inner surfaces of both ends of the inner slider of the friction pendulum and the corresponding anti-pullout sleeve of the friction pendulum, so that the outer surfaces of both ends of the inner slider of the friction pendulum always keep in contact with the corresponding friction pendulum base. The supporting mechanism of the inner slider of the friction pendulum includes a supporting tray for the inner slider of the friction pendulum and a supporting spring sheet group; the supporting tray for the inner slider of the friction pendulum can slide freely with the inner surface of the inner slider of the friction pendulum; each group of the supporting spring sheet group includes a plurality of arc-shaped spring sheets 2; one end of the arc-shaped spring sheet 2 is fixedly inserted into the groove of the anti-pullout sleeve cover of the friction pendulum, and the other end is fixedly inserted into the groove of the supporting tray for the inner slider of the friction pendulum.

2. The self-resetting multi-dimensional seismic isolation bearing according to claim 1 is characterized in that: The vertical seismic isolation guide cylinder includes a plurality of seismic isolation guide blocks. Ear plates are provided on both sides of each seismic isolation guide block. Every two adjacent seismic isolation guide blocks are connected and fixed by bolts and nuts.

3. The self-resetting multi-dimensional seismic isolation bearing according to claim 1 is characterized in that: The vertical vibration isolation spring sheet group includes a plurality of arc-shaped spring sheets 1, and both ends of each arc-shaped spring sheet 1 are respectively clamped into the corresponding clamping grooves of the circular flange and the annular flange for fixation.

4. The self-resetting multi-dimensional seismic isolation bearing according to claim 1 is characterized in that: The outer side surface of the vertical seismic isolation lining portion of the vertical seismic isolation lining-friction pendulum base integrated component is provided with an outer convex ring, and the inner side surface of the vertical seismic isolation guide cylinder is provided with a limiting groove that cooperates with the outer convex ring, and the outer convex ring is embedded in the limiting groove.

5. The self-resetting multi-dimensional seismic isolation bearing according to claim 1 is characterized in that: The inner slider of the friction pendulum includes an upper slider, a lower slider, a pin self-locking assembly and a polytetrafluoroethylene plate; the cylindrical key of the upper slider is embedded in the cylindrical groove of the lower slider, and the two are fixed by the pin self-locking assembly; the polytetrafluoroethylene plate is respectively placed on the arc sliding surface of the upper slider and the lower slider and bonded with epoxy resin.

6. The self-resetting multi-dimensional seismic isolation bearing according to claim 5 is characterized in that: The pin self-locking assembly includes multiple groups of pin self-locking blocks; each group of the pin self-locking blocks includes two return springs and a pin; one end of the return spring is fixed to the pin, and the other end is fixed to the bottom of the rectangular groove of the cylindrical key of the upper slider, and the two return springs are symmetrically arranged up and down along the horizontal center line of the rectangular groove; the pin can slide freely in the rectangular groove, and the tenon of the pin can slide freely in the square limiting groove of the cylindrical key of the upper slider; the surface of the pin that cooperates with the cylindrical groove of the lower slider is an arc surface, the diameter of the arc surface of the pin is the same as the inner diameter of the cylindrical groove of the lower slider, and the thickness of the pin is the same as the depth of the square limiting groove of the cylindrical key of the upper slider.

7. The self-resetting multi-dimensional seismic isolation bearing according to claim 1 is characterized in that: A rebound block is provided on the piston rod, a flow-blocking rubber ring is provided between the piston and the inner wall of the working cylinder, and a lower supporting seat of a supporting base is provided on the inner wall of the bottom cover of the oil storage cylinder.

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