Friction pendulum support with adjustable friction coefficient

Abstract

The invention relates to the technical field of building shock insulation, in particular to a friction pendulum support with an adjustable friction coefficient. The friction bearing comprises an upper seat plate, a lower seat plate, a spherical crown body, a first friction surface, a second friction surface, a first friction material, a second friction material, a spring, a pressing gasket and a locking nut. The first friction material is mounted in the counter bores of the upper and lower seat plates, the second friction material is mounted in the through holes of the upper and lower seat plates, one end of the spring is mounted on the back of the second friction material, the other end of the spring is in contact with the compression gasket, and the compression gasket is screwed and fixed through internal threads at the ends of the through holes of the upper and lower seat plates. The friction pendulum support can adjust the tightness degree of the spring by controlling the screwing-in depth of the pressing gasket, and then the extrusion force between the second friction material and the friction surface is adjusted. And finally, the overall friction coefficient of the friction pendulum support is adjusted according to different extrusion force distribution proportions of the first friction material and the second friction material to the friction surface.

Description

Technical Field

[0001] The invention relates to the technical field of building seismic isolation, in particular to a friction pendulum support with adjustable friction coefficient. Background Art

[0002] The friction pendulum bearing is a device that uses arc surface sliding to achieve seismic isolation and energy dissipation. It has the advantages of stable isolation period, high vertical bearing capacity, large horizontal deformation capacity, and strong self-reset ability. The core component of the friction pendulum bearing is the sliding surface, and its material and shape determine the friction coefficient and seismic isolation curvature of the bearing. The friction coefficient is an important parameter that affects the seismic isolation effect and reset performance of the bearing. A too high friction coefficient will make it difficult for the bearing to slide, reducing the seismic isolation effect; a too low friction coefficient will cause the bearing to slide excessively and increase the reset distance. Therefore, a friction pendulum bearing with an adjustable friction coefficient is designed. The friction coefficient of the bearing can be adjusted according to different earthquake conditions and structural requirements to achieve the best seismic isolation and reset effects. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a friction pendulum support with an adjustable friction coefficient.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a friction pendulum support with adjustable friction coefficient, including an upper seat plate, a lower seat plate, a spherical crown, a first friction surface, a second friction surface, a first friction material, a second friction material, a spring, a clamping gasket, and a locking nut.

[0005] The upper seat plate and the lower seat plate are arranged opposite to each other, and a plurality of countersunk holes and through holes are arranged at the same position.

[0006] Furthermore, the opposing surfaces of the upper and lower seat plates are spherical surfaces with the same radius, and the through holes of the upper and lower seat plates are provided with internal threads at the ends away from the spherical surfaces.

[0007] The first friction material is installed in the countersunk holes of the upper and lower seat plates, and the first friction material preferably protrudes from the spherical surfaces of the upper and lower seat plates by 1-2 mm.

[0008] The second friction material is installed in the through holes of the upper and lower seat plates, one end of the spring is installed on the back of the second friction material, and the other end is in contact with the pressing gasket.

[0009] The compression gasket is screwed in and fixed through the internal threads at the ends of the through holes of the upper and lower seat plates.

[0010] Preferably, the compression gasket is provided with a hexagonal hole on the side facing away from the spring for screwing in and out of the compression gasket.

[0011] Furthermore, the locking nut is screwed in through the internal thread at the end of the through hole until it is tightly attached to the compression gasket.

[0012] The first friction surface and the second friction surface on the spherical crown are in sliding contact with the first friction material and the second friction material installed on the upper and lower seat plates.

[0013] Furthermore, the first friction surface and the second friction surface on the spherical crown are spherical surfaces with the same radius and the same material, and are in contact with the first friction material and the second friction material.

[0014] Furthermore, the friction coefficient between the first friction material and the first friction surface or the second friction surface is smaller than the friction coefficient between the second friction material and the first friction surface or the second friction surface.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the friction pendulum support can adjust the tightness of the spring by controlling the screwing depth of the compression gasket, thereby adjusting the extrusion force between the second friction material and the friction surface. Finally, the overall friction coefficient of the friction pendulum support is adjusted according to the different distribution ratios of the extrusion force between the first friction material and the second friction material and the friction surface, so as to meet the requirements of different engineering projects for different friction coefficients of the friction pendulum support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0017] Figure 2 This is an example of the layout of the friction material of the present invention.

[0018] In the figure: 1, upper seat plate; 2, lower seat plate; 3, spherical crown; 4, first friction surface; 5, second friction surface; 6, first friction material; 7, second friction material; 8, spring; 9, clamping gasket; 10, locking nut. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example: Figure 1-Figure 2 As shown, a friction pendulum support with adjustable friction coefficient includes an upper seat plate, a lower seat plate, a spherical crown, a first friction surface, a second friction surface, a first friction material, a second friction material, a spring, a compression gasket, and a locking nut.

[0021] The upper seat plate and the lower seat plate are arranged opposite to each other and are provided with a plurality of countersunk holes and through holes at the same position. The opposite surfaces of the upper and lower seat plates are spherical surfaces with the same radius, and the through holes of the upper and lower seat plates are provided with internal threads at the ends away from the spherical surfaces.

[0022] The first friction material is installed in the countersunk holes of the upper and lower seat plates, and the material preferably protrudes 1-2mm from the spherical surface of the upper and lower seat plates. The second friction material is installed in the through holes of the upper and lower seat plates, one end of the spring is installed on the back of the second friction material, and the other end contacts the compression pad.

[0023] The compression gasket is fixed by the internal threads at the ends of the through holes of the upper and lower seat plates. For easy adjustment, a hexagonal hole is provided on the back of the compression gasket facing the spring side for screwing in and out of the compression gasket. The locking nut is screwed in through the internal threads at the ends of the through holes until it is tightly attached to the compression gasket.

[0024] The first friction surface and the second friction surface on the spherical crown are in sliding contact with the first friction material and the second friction material installed on the upper and lower seat plates. These friction surfaces are spherical surfaces with the same radius and the same material, and fit with the first friction material and the second friction material.

[0025] It is worth noting that the friction coefficient between the first friction material and the first friction surface or the second friction surface is smaller than the friction coefficient between the second friction material and the first friction surface or the second friction surface.

[0026] The working principle of the present invention is: the friction coefficient between the first friction material and the friction surface is μ1, the friction coefficient between the second friction material and the friction surface is μ2, and μ1<μ2. When the friction coefficient of the friction pendulum support required for the project is μ1, the pressing gasket is adjusted to make the spring in a relaxed state until there is no squeezing force between the second friction material and the friction surface. At this time, the friction force of the friction pendulum support is generated by the mutual sliding between the first friction material and the friction surface. When the friction coefficient of the friction pendulum support required for the project is μ2, the pressing gasket is adjusted to make the spring in a compressed state until there is no squeezing force between the first friction material and the friction surface. At this time, the friction force of the friction pendulum support is generated by the mutual sliding between the second friction material and the friction surface. When the friction coefficient of the friction pendulum support required for the project is between μ1 and μ2, the pressing gasket is adjusted to make the spring in a compressed state, and there is squeezing force between the first friction material and the second friction material and the friction surface. At this time, the friction force of the friction pendulum support is generated by the mutual sliding between the first friction material and the second friction material and the friction surface. In summary, the friction coefficient of the friction pendulum support can be adjusted between μ1 and μ2 by changing the tightness of the spring, and the adjustment is flexible and convenient.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A friction pendulum support with adjustable friction coefficient, characterized in that: It includes an upper seat plate, a lower seat plate, a spherical crown, a first friction surface, a second friction surface, a first friction material, a second friction material, a spring, a clamping gasket, and a locking nut. The upper seat plate and the lower seat plate are arranged opposite to each other, and a plurality of countersunk holes and through holes are arranged at the same position, and the opposite surfaces of the upper and lower seat plates are spherical surfaces with the same radius. The first friction material is installed in the countersunk holes of the upper and lower seat plates, and the first friction material preferably protrudes 1-2 mm from the spherical surfaces of the upper and lower seat plates. The second friction material is installed in the through holes of the upper and lower seat plates, one end of the spring is installed on the back of the second friction material, and the other end is in contact with the clamping gasket. The clamping gasket is screwed in and fixed through the internal threads at the ends of the through holes of the upper and lower seat plates. The locking nut is screwed in through the internal threads at the ends of the through holes until it is tightly attached to the clamping gasket. The first friction surface and the second friction surface on the spherical crown are in sliding contact with the first friction material and the second friction material installed on the upper and lower seat plates. The first friction surface and the second friction surface on the spherical crown are spherical surfaces with the same radius and the same material, and are in contact with the first friction material and the second friction material.

2. A friction pendulum support with adjustable friction coefficient according to claim 1, characterized in that: The through holes at the upper and lower seat plates are provided with internal threads at the ends away from the spherical surface.

3. The friction pendulum support with adjustable friction coefficient according to claim 1, characterized in that: The side of the compression gasket facing away from the spring is provided with a hexagonal hole for screwing in and out of the compression gasket.

4. The friction pendulum support with adjustable friction coefficient according to claim 1, characterized in that: The friction coefficient between the first friction material and the first friction surface or the second friction surface is smaller than the friction coefficient between the second friction material and the first friction surface or the second friction surface.

Images