Three-dimensional seismic isolation bearing

Abstract

The application discloses a three-dimensional shock-reducing and shock-isolating support, which comprises a base, lead core rubber supports, a disc spring group and a torsional spring damper, the torsional spring damper comprises a damper sleeve, a planar spiral spring piece, a ball screw and a screw nut block, the ball screw and the screw nut block form a ball screw pair, the screw nut block is sleeved with the damper sleeve, the screw nut block rotates in the damper sleeve and is fixedly connected with the damper sleeve in the axial direction, the bottom end of the damper sleeve is fixed on the base, the inner end of the planar spiral spring piece is fixed on the screw nut block, and the outer end is fixed on the inner wall of the damper sleeve, the bottom end of the lead core rubber support is fixed on the base, the disc spring group is sleeved outside the damper sleeve and supported on a lower support plate, the lower support plate is connected with the top end of each lead core rubber support, the top end of the disc spring group is provided with an upper support plate, and the upper support plate is fixedly connected with the top end of the ball screw. The application can effectively reduce the height of the support, improve the stability of the support and improve the shock-isolating effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building structure shock absorption and isolation technology, in particular to a three-dimensional shock absorption and isolation support. BACKGROUND

[0002] Isolation support refers to a supporting device arranged for achieving isolation requirements. The isolation support is installed between the upper structure and the foundation, and serves as a soft connection with the ground, dissipates most of the seismic energy, and blocks the transmission of seismic action force to the upper structure, thereby reducing the vibration of the upper structure and achieving the purpose of protecting the building structure. The current mature isolation support technology mainly targets horizontal isolation. However, the seismic response is multidimensional and multidirectional, and it also has a vertical seismic component and three rotational components. For high-rise building structures and some important buildings and structures in high-intensity regions, only the mature horizontal isolation technology cannot meet the safety use range of the building. Therefore, the research on three-dimensional isolation technology is a new direction of building isolation and an inevitable stage of the development of isolation technology.

[0003] In the existing three-dimensional shock absorption and isolation support, the following two problems mainly exist: on the one hand, the support needs to bear the vertical load mainly composed of the self-weight of the structure, and the vertical structure needs to have large stiffness, so that the deformation under the action of the load is small, and thus the energy dissipation capacity is low. On the other hand, the three-dimensional shock absorption and isolation support may cause the structure to sway when realizing the variable vertical stiffness due to the high height of the device. SUMMARY

[0004] The present application aims to provide a three-dimensional shock absorption and isolation support to solve the problems existing in the prior art, and can effectively reduce the height of the support, improve the stability of the support, and improve the isolation effect.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The application provides a three-dimensional shock-absorbing support, which comprises a base, a lead-core rubber support, a disc spring group and a torsional spring damper, the torsional spring damper comprises a damper sleeve, a planar spiral spring, a ball screw and a screw nut block, the ball screw and the screw nut block are connected in cooperation to form a ball screw pair structure, the screw nut block is sleeved on the damper sleeve, rotates in the damper sleeve and is fixedly connected with the damper sleeve in the axial direction, the bottom end of the damper sleeve is fixedly connected with the base, the planar spiral spring is sleeved on the screw nut block, the inner end of the planar spiral spring is fixedly connected with the screw nut block, and the outer end is fixedly connected with the inner wall of the damper sleeve, a plurality of lead-core rubber supports are arranged on the outer side of the damper sleeve, the bottom end of each lead-core rubber support is fixedly connected with the base, the disc spring group is sleeved outside the damper sleeve and supported on a lower support plate sleeved outside the damper sleeve, the bottom end of the lower support plate is connected with the top end of each lead-core rubber support, an upper support plate is arranged at the top end of the disc spring group, the upper support plate is located above the damper sleeve and fixedly connected with the top end of the ball screw, and the upper support plate and the ball screw can move axially together.

[0007] Preferably, the planar spiral spring is made of a memory alloy material.

[0008] Preferably, each lead-core rubber support is uniformly arranged on the outer side of the damper sleeve in the circumferential direction.

[0009] Preferably, the disc spring group comprises a plurality of disc springs stacked together, and the stacking directions of two adjacent disc springs are opposite.

[0010] Preferably, the screw nut block is rotatably connected in the damper sleeve through bearings at both ends.

[0011] Preferably, an inertia flywheel is further fixedly connected with the screw nut block, and the inertia flywheel is coaxially arranged with the ball screw.

[0012] Preferably, the lead-core rubber support comprises an upper sealing plate, a lower sealing plate, a rubber layer, a steel plate layer and a lead core, a plurality of rubber layers and steel plate layers are alternately stacked between the upper sealing plate and the lower sealing plate, and the lead core is arranged at the center of the stacked structure formed by the rubber layers and the steel plate layers.

[0013] Preferably, an annular protective shell is connected with the outer edge of the base, the annular protective shell is sleeved outside the disc spring group, and each lead-core rubber support is arranged in the annular protective shell.

[0014] The application has the following technical effects compared with the prior art.

[0015] The application provides a three-dimensional shock absorption and isolation support, most of the earthquake energy transmitted to an upper structure in a horizontal direction can be dissipated through a lead rubber bearing, the deficiency of the vertical shock absorption and isolation capacity of the lead rubber bearing can be effectively made up by using a torsional spring damper and a disc spring set, the vertical shock absorption and isolation capacity of the support is improved, and thus the overall shock absorption and isolation effect of the support is improved. The torsional spring damper, the disc spring set and the lead rubber bearing are arranged in an inner-outer distributed structure, the disc spring set has a short stroke and requires a small space, the height of the support can be effectively reduced, the volume of the support is reduced, and the stability of the support is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 A three-dimensional shock absorption and isolation support provided by the application is shown in the perspective view.

[0018] Figure 2 A three-dimensional shock absorption and isolation support provided by the application is shown in the cross-sectional view.

[0019] Figure 3 An exploded view of a three-dimensional shock absorption and isolation support provided by the application is shown.

[0020] Figure 4 A cross-sectional view of a torsional spring damper in the application is shown.

[0021] Figure 5 A three-dimensional view of the connection structure of a ball screw, a screw nut block, a planar spiral spring and an inertia flywheel in the application is shown.

[0022] Figure 6 A cross-sectional view of a lead rubber bearing in the application is shown.

[0023] In the figure: 1 - base, 2 - lead rubber bearing, 201 - upper sealing plate, 202 - lower sealing plate, 203 - rubber layer, 204 - steel plate layer, 205 - lead core, 3 - disc spring set, 301 - disc spring, 4 - torsional spring damper, 401 - damper sleeve, 4011 - limiting step, 402 - planar spiral spring, 403 - ball screw, 404 - screw nut block, 4041 - pressing step, 405 - gland, 406 - bearing, 407 - inertia flywheel, 5 - lower support plate, 6 - upper support plate, 7 - annular protective shell. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0025] The present application aims to provide a three-dimensional seismic isolation support to solve the problems in the prior art, effectively reduce the height of the support, improve the stability of the support, and improve the seismic isolation effect.

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0027] As shown in Figures 1-6 The present embodiment provides a three-dimensional seismic isolation support, which comprises a base 1, a lead rubber bearing 2, a disc spring set 3 and a torsional spring damper 4. The torsional spring damper 4 comprises a damper sleeve 401, a planar spiral spring leaf 402, a ball screw 403 and a screw nut block 404. The ball screw 403 and the screw nut block 404 are connected in cooperation to form a ball screw pair structure. The screw nut block 404 is sleeved with the damper sleeve 401. The screw nut block 404 rotates in the damper sleeve 401 and is fixedly connected with the damper sleeve 401 in the axial direction. The bottom end of the damper sleeve 401 is fixedly connected to the base 1. The planar spiral spring leaf 402 is sleeved on the screw nut block 404. The inner end of the planar spiral spring leaf 402 is fixedly connected to the screw nut block 404, and the outer end is fixedly connected to the inner wall of the damper sleeve 401. A plurality of lead rubber bearings 2 are arranged on the outer side of the damper sleeve 401. The bottom end of each lead rubber bearing 2 is fixedly connected to the base 1. The disc spring set 3 is sleeved outside the damper sleeve 401 and supported on a lower support plate 5 sleeved outside the damper sleeve 401. The bottom end of the lower support plate 5 is connected to the top end of each lead rubber bearing 2. The top end of the disc spring set 3 is provided with an upper support plate 6. The upper support plate 6 is located above the damper sleeve 401 and is fixedly connected to the top end of the ball screw 403. The upper support plate 6 and the ball screw 403 can move axially together.

[0028] Under the action of three-dimensional earthquake, most of the earthquake energy transmitted to the upper structure in the horizontal direction is dissipated by the lead rubber bearing 2, and the disc spring group 3 is elastically deformed under the action of vertical load. Part of the earthquake energy is stored in the disc spring in the form of elastic potential energy, and another part is dissipated in the form of heat energy through the friction between the disc springs. On this basis, the torsional spring damper 4 is also provided. When the structure vertically displaces, the displacement of the ball screw 403 will be caused, and the ball screw nut block 404 will be rotated after the displacement of the ball screw 403, so as to convert part of the earthquake energy into kinetic energy. The ball screw nut block 404 drives the planar spiral spring sheet 402 to twist, and part of the earthquake energy is stored in the planar spiral spring sheet 402. The torsional spring damper 4 and the disc spring group 3 effectively make up for the deficiency of the vertical isolation capacity of the lead rubber bearing 2, improve the vertical isolation capacity of the bearing, and thus improve the overall isolation effect of the bearing. The torsional spring damper 4, the disc spring group 3 and the lead rubber bearing 2 are arranged in an inner-outer distributed structure, and the disc spring group 3 has the characteristics of short stroke and small required space, so as to effectively reduce the height and volume of the bearing, and thus improve the stability of the bearing.

[0029] In the embodiment, the planar spiral spring sheet 402 is made of a memory alloy material. The shape memory alloy (SMA) material has unique high damping and large deformation self-resetting characteristics, can repeatedly yield without permanent deformation, and has the advantages of effectively reducing structural residual deformation. The planar spiral spring sheet 402 made of SMA has the characteristics of effectively improving the energy dissipation and shock absorption performance of the bearing. The planar spiral spring sheet 402 can also be made of other energy dissipation materials, and the memory alloy material is the preferred material of the embodiment.

[0030] In the embodiment, each lead rubber bearing 2 is uniformly arranged outside the damper sleeve 401 in the circumferential direction, so that each lead rubber bearing 2 is more uniformly stressed. Under the action of three-dimensional earthquake, most of the earthquake energy transmitted to the upper structure in the horizontal direction is dissipated by the lead rubber bearing 2, and has a certain vertical isolation capacity.

[0031] In the embodiment, the disc spring group 3 includes a plurality of disc springs 301 stacked together, and the stacking directions of the adjacent two disc springs 301 are opposite. The disc spring group 3 has the characteristics of large load, short stroke, small required space, convenient combination use, easy maintenance and replacement, and high economic safety. Under the action of vertical load, the disc spring group 3 is elastically deformed, and part of the earthquake energy is stored in the disc spring 301 in the form of elastic potential energy, and another part is dissipated in the form of heat energy through the friction between the disc springs 301.

[0032] In the embodiment, the screw nut block 404 is rotatably connected to the damper sleeve 401 at both ends through bearings 406. The lower end of the interior of the damper sleeve 401 is provided with a limiting step 4011, and the screw nut block 404 is provided with a pressing step 4041 at both ends. The outer ring of the lower end bearing 406 is supported on the limiting step 4011, and the inner ring upper end is in contact with the pressing step 4041 of the lower end of the screw nut block 404. The inner ring of the upper end bearing 406 is supported on the pressing step 4041 of the upper end of the screw nut block 404, and the outer ring is pressed by the gland 405 at the top end of the damper sleeve 401, so as to press and connect the screw nut block 404 in the damper sleeve 401, so as to ensure that the screw nut block 404 can rotate in the damper sleeve 401 and cannot axially displace relative to the damper sleeve 401.

[0033] In the embodiment, the screw nut block 404 is rotatably connected to the damper sleeve 401 at both ends through bearings 406. The lower end of the interior of the damper sleeve 401 is provided with a limiting step 4011, and the screw nut block 404 is provided with a pressing step 4041 at both ends. The outer ring of the lower end bearing 406 is supported on the limiting step 4011, and the inner ring upper end is in contact with the pressing step 4041 of the lower end of the screw nut block 404. The inner ring of the upper end bearing 406 is supported on the pressing step 4041 of the upper end of the screw nut block 404, and the outer ring is pressed by the gland 405 at the top end of the damper sleeve 401, so as to press and connect the screw nut block 404 in the damper sleeve 401, so as to ensure that the screw nut block 404 can rotate in the damper sleeve 401 and cannot axially displace relative to the damper sleeve 401.

[0034] In the embodiment, the lead rubber bearing 2 includes an upper sealing plate 201, a lower sealing plate 202, a rubber layer 203, a steel plate layer 204, and a lead core 205. The upper sealing plate 201 and the lower sealing plate 202 are alternately stacked with multiple rubber layers 203 and steel plate layers 204 therebetween, and the lead core 205 is arranged at the center of the stacked structure formed by the rubber layers 203 and the steel plate layers 204. The structure of the lead rubber bearing 2, in which multiple steel plates and rubbers are alternately stacked, can reduce horizontal seismic action and withstand large vertical loads. The addition of the lead core 205 in the stacked structure can withstand the vertical load of the entire upper structure and provide certain damping, thereby having good seismic isolation effect. However, the lead rubber bearing 2 has large vertical stiffness due to the large vertical load it withstands, and thus has a certain deficiency in vertical seismic isolation. The torsional spring damper 4 arranged in the bearing and the coaxially installed disc spring set 3 can effectively compensate for the deficiency of the lead rubber bearing 2 in vertical seismic isolation, thereby improving the vertical seismic isolation capacity of the bearing.

[0035] In the embodiment, the base 1 is connected with an annular protective shell 7, the annular protective shell 7 is sleeved on the disc spring set 3, and each lead rubber bearing 2 is arranged in the annular protective shell 7. The annular protective shell 7 can protect the internal components such as the lead rubber bearings 2 and the disc spring set 3, but will not affect the seismic mitigation and isolation functions of the components.

[0036] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A three-dimensional seismic isolation bearing, characterized by: The device comprises a base, lead rubber bearings, a disc spring group and a torsional spring damper, the torsional spring damper comprises a damper sleeve, a planar spiral spring, a ball screw and a screw nut block, the ball screw and the screw nut block are connected to form a ball screw pair structure, the screw nut block is sleeved on the damper sleeve, rotates in the damper sleeve and is fixedly connected with the damper sleeve in the axial direction, the bottom end of the damper sleeve is fixedly connected to the base, the planar spiral spring is sleeved on the screw nut block, the inner end of the planar spiral spring is fixedly connected to the screw nut block, and the outer end is fixedly connected to the inner wall of the damper sleeve, a plurality of lead rubber bearings are arranged on the outer side of the damper sleeve, the bottom end of each lead rubber bearing is fixedly connected to the base, the disc spring group is sleeved outside the damper sleeve and supported on a lower support plate sleeved outside the damper sleeve, the bottom end of the lower support plate is connected with the top end of each lead rubber bearing, the top end of the disc spring group is provided with an upper support plate, the upper support plate is located above the damper sleeve and is fixedly connected with the top end of the ball screw, and the upper support plate and the ball screw can move axially together.

2. The three-dimensional seismic isolation bearing according to claim 1, characterized in that: The planar spiral spring is made of a memory alloy material.

3. The three-dimensional seismic isolation bearing of claim 1, wherein: Each lead rubber bearing is uniformly arranged on the outer side of the damper sleeve in the circumferential direction.

4. The three-dimensional seismic isolation bearing of claim 1, wherein: The disc spring group comprises a plurality of stacked disc springs, and the stacking directions of two adjacent disc springs are opposite.

5. The three-dimensional seismic isolation bearing of claim 1, wherein: Both ends of the screw nut block are rotatably connected in the damper sleeve through bearings.

6. The three-dimensional seismic isolation bearing of claim 1, wherein: The screw nut block is further fixedly connected with an inertia flywheel, and the inertia flywheel is coaxially arranged with the ball screw.

7. The three-dimensional seismic isolation bearing of claim 1, wherein: The lead rubber bearing comprises an upper sealing plate, a lower sealing plate, a rubber layer, a steel plate layer and a lead core, a plurality of rubber layers and steel plate layers are alternately stacked between the upper sealing plate and the lower sealing plate, and the lead core is arranged at the center of the stacked structure formed by the rubber layers and the steel plate layers.

8. The three-dimensional seismic isolation bearing of claim 1, wherein: An annular protective shell is connected to the outer edge of the base, the annular protective shell is sleeved outside the disc spring group, and each lead rubber bearing is arranged in the annular protective shell.

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