A centrifugal friction centripetal sliding damper device

Abstract

A centrifugal friction centripetal sliding damper device comprises a piston and a friction plate, wherein the piston is arranged on the piston rod on both sides of the cylindrical boss in the middle part of the piston rod; the two ends of the piston rod extend from the end caps on both sides; an annular limit block is provided on the outside of the cylindrical boss in the middle part of the piston rod, and a wedge-shaped long slide rail is provided on both sides; a first folding spring and a steel plate are provided between the left and right sides of the strip steel block outside the limit block and the square boss inside the end cap, and the flat friction plate is fixed to the surface of the steel plate; a groove with a trapezoidal cross section is provided on the inside of the rectangular flat plate constituting the device housing, and a second folding spring and a matching cylindrical roller are provided in the groove; the steel plate contacts the cylindrical roller, the inner slope of the steel plate contacts the surface of the long slide rail, and the end of the steel plate near the center is connected to the first folding spring. The present invention can play an energy-consuming and vibration-reducing role when used in a recoverable functional structure of a building structure, and does not require replacement or repair after an earthquake, and does not hinder the recovery of the elastic deformation of the structure.

Description

Technical Field

[0001] The invention relates to a building structure performance shock absorption technology, in particular to a centrifugal friction centripetal sliding type damper device. Background Art

[0002] The centrifugal friction centripetal sliding damper is a semi-active control device manufactured by utilizing the characteristics that the outer circle and inner square piston and the friction plate generate greater friction during centrifugal motion while the friction during centrifugal motion is negligible. It has the advantages of ordinary materials, low price, no need for additional special springs, SMA and other components to provide restoring force, and can provide additional stiffness for the structure during centrifugal motion; it does not need to be replaced after an earthquake and does not affect the recovery of residual deformation of the structure after an earthquake. Conventional dampers mainly rely on air pressure and hydraulic pressure to generate friction, and the friction is not easy to control. Under the action of an earthquake, conventional dampers are extremely easy to be damaged. Once damaged, conventional dampers will completely lose their energy-consuming and shock-absorbing functions, and their reliability needs to be further improved. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention proposes a centrifugal friction centripetal sliding damper device, which is used in the effective shock absorption of building structures. It can play an energy-consuming and vibration-reducing role in building structures and recoverable functional structures, and does not require replacement and repair after an earthquake, while not hindering the recovery of the elastic deformation of the structure.

[0004] The technical solution adopted in the present invention is:

[0005] A centrifugal friction centripetal sliding damper device is designed, comprising a device housing, a piston (4) and a friction plate (5), wherein the piston (4) is arranged on the piston rod on both sides of a cylindrical boss arranged in the middle of a cylindrical piston rod (1); the device housing is fixed by two left and right end covers (2) and four rectangular flat plates (9) to form a closed chamber, in which the piston is arranged, and both ends of the piston rod extend from the circular holes in the middle of the end covers on both sides; the cross sections of the piston (4) and the two end covers (2) are both square outside and circular inside;

[0006] A protruding strip steel block (94) is provided at the middle portion of the inner side of the rectangular flat plate (9), and an annular stopper (8) is provided at the outer side of the cylindrical boss at the middle portion of the piston rod. The cross-sectional shape of the stopper (8) is square outside and circular inside, and both ends of the four outer side surfaces are engraved with a long strip notch with a square cross section, and a long strip slide rail (3) with a wedge-shaped cross section is fixed to the outer side surface close to the long strip notch.

[0007] The inner sides of the two end covers (2) are provided with square bosses, and the periphery of the square bosses is fixed with a long slide rail (3) with a wedge-shaped cross section; a long first folding spring (7) and a steel plate (6) are provided between the left and right sides of the strip steel block (94) outside the limit block (8) and the square bosses inside the two end covers (2); a flat friction plate (5) is fixed to the surface of the steel plate (6) and is arranged outside the piston (4); the outside of the slide rail and the limit block is provided with a folding spring and a rectangular flat plate;

[0008] The inner side of the rectangular flat plate (9) is provided with a groove (91) with a trapezoidal cross section, and a second folding spring (93) and a matching cylindrical roller (92) are provided in the groove (91); the other surface of the steel plate (6) contacts the surface of the cylindrical roller (92), and the inner ends of the steel plate (6) are sloped, and the sloped parts contact the surface of the long slide rail (3), and the end of the steel plate (6) near the center is connected to the first folding spring (7).

[0009] The centrifugal friction centripetal sliding damper device has symmetrically distributed cylindrical holes (11) on both sides of the cylindrical boss near the middle of the piston rod (1), and a telescopic spring (13) and a ball rod plug (14) are provided in the cylindrical hole (11). The ball end of the ball rod plug (14) extends out of the cylindrical hole (11), and the other end of the telescopic spring (13) is stuck in the hole through a limit pin (12).

[0010] In the centrifugal friction centripetal sliding damper device, the first folding spring (7), the second folding spring (93) and the telescopic spring (13) are always in a compressed state. When the piston rod (1) is stationary, under the elastic force of the telescopic spring (13), the flat friction plate (5) and the outer square inner circle piston (4) are always in a contact state.

[0011] In the centrifugal friction centripetal sliding damper device, the diameter of the middle circle of the cross section of the limit block (8) is slightly larger than the cross section diameter of the middle cylindrical boss of the piston rod (1), the limit block (8) does not affect the left and right movement of the piston rod (1), and there is no contact between the two.

[0012] Beneficial effects of the invention:

[0013] 1. The centrifugal friction centripetal sliding damper device of this invention provides additional damping force to the structure during centrifugal motion, but no damping force during centrifugal motion. It does not require replacement after an earthquake, and does not affect the recovery of residual structural deformation. The damping force is provided by the outer square inner circle piston and the friction plate (the friction plate and the outer square inner circle piston squeeze each other), resulting in high damping force and strong energy dissipation capacity. The friction force can be controlled by the deformation of the telescopic spring, making it highly adaptable and practical.

[0014] 2. The centrifugal friction centripetal sliding damper device of the present invention has a centrifugal motion to one side, while the outer and inner pistons on the other side contact the surface of the friction plate but do not slide, resulting in no friction. Therefore, the centrifugal motion can provide additional stiffness for the structure. It does not need to be replaced after an earthquake, and does not affect the recovery of residual deformation of the structure after an earthquake. It can better suppress the response of civil engineering structures under large earthquakes and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the centrifugal friction centripetal sliding damper device of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the AA section.

[0017] Figure 3 yes Figure 1 Schematic diagram of the middle BB section.

[0018] Figure 4 yes Figure 1 Schematic diagram of the CC cross section.

[0019] Figure 5 yes Figure 1 Schematic diagram of the middle DD section.

[0020] Figure 6 yes Figure 1 Schematic diagram of the EE section.

[0021] Figure 7 yes Figure 1 Schematic diagram of the FF cross section.

[0022] Figure 8 yes Figure 1 Schematic diagram of the GG section.

[0023] Figure 9 It is a schematic diagram of the overall structure of the centrifugal motion process.

[0024] Figure 10 It is a schematic diagram of the overall structure of the centripetal motion process. DETAILED DESCRIPTION

[0025] In order to make the technical concept and advantages of the present invention more clearly understood, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings. Example

[0026] See also Figure 1 The centrifugal friction centripetal sliding damper device of the present invention comprises a device housing, a piston 4 and a friction plate 5, wherein the piston 4 is arranged on the piston rod on both sides of the cylindrical boss arranged in the middle part of the cylindrical piston rod 1;

[0027] The device housing is fixed by two left and right end covers 2 and four rectangular flat plates 9 to form a closed chamber, in which the piston is set, and the two ends of the piston rod extend from the circular holes in the middle of the two end covers; the cross-sections of the piston 4 and the two end covers 2 are both square outside and circular inside;

[0028] A protruding strip steel block 94 is provided in the middle of the inner side of the rectangular flat plate 9, and an annular limit block 8 is provided on the outer side of the cylindrical boss in the middle part of the piston rod. The cross-sectional shape of the limit block 8 is square outside and circular inside, and both ends of its four outer sides are engraved with long strip notches with square cross sections. A long strip slide rail 3 with a wedge-shaped cross section is fixed on its outer side close to the long strip notches.

[0029] The inner sides of the two end covers 2 are provided with square bosses, and a long slide rail with a wedge-shaped cross section is fixed around the square bosses. A long first folding spring 7 and a steel plate 6 are provided between the left and right sides of the strip steel block 94 outside the limit block 8 and the square bosses inside the two end covers 2. A flat friction plate 5 is fixed to the surface of the steel plate 6 and is arranged on the outer side of the piston 4. The outer sides of the slide rail and the limit block are provided with a folding spring and a rectangular flat plate.

[0030] The inner side of the rectangular flat plate 9 is provided with a groove 91 with a trapezoidal cross-section, and a second folding spring 93 and a matching cylindrical roller 92 are provided in the groove 91; the other surface of the steel plate 6 contacts the surface of the cylindrical roller 92, and the two ends of the inner side of the steel plate 6 are sloped, and the sloped part contacts the surface of the long slide rail 3, and the end of the steel plate 6 close to the center is connected to the first folding spring 7.

[0031] The contact surfaces between the cylindrical roller 92 and the steel plate 6 as well as between the steel plate 6 and the long slide rail 3 are smooth and frictionless, and the friction between the contact surfaces during movement is negligible.

[0032] The centrifugal friction centripetal sliding damper device of the present invention is provided with symmetrically distributed cylindrical holes 11 on both sides of the cylindrical boss near the middle part of the piston rod 1, and a telescopic spring 13 and a ball rod plug 14 are provided in the cylindrical hole 11. The ball end of the ball rod plug 14 extends out of the cylindrical hole 11, and the other end of the telescopic spring 13 is stuck in the hole by a limit pin 12.

[0033] The first folding spring 7, the second folding spring 93 and the telescopic spring 13 are always in a compressed state. When the piston rod 1 is stationary, under the elastic force of the telescopic spring 13, the flat friction plate 5 and the outer square inner circle piston 4 are always in contact.

[0034] The diameter of the middle circle of the cross section of the limit block 8 is slightly larger than the cross section diameter of the cylindrical boss in the middle of the piston rod 1. The limit block 8 does not affect the left and right movement of the piston rod 1, and there is no contact between the two.

[0035] In the centrifugal friction centripetal sliding damper device, the cross-sectional profile of the end cover 2, the piston 4 and the limit block 8 is square, which can be square or rectangular.

[0036] Figure 1 It is a schematic diagram of the overall structure of the centrifugal friction centripetal sliding damper device of the present invention. Figure 2-Figure 8 They are Figure 1 Schematic diagram of the AA, BB, CC, DD, EE, FF and GG cross sections. Example

[0037] See also Figure 1 The centrifugal friction centripetal sliding damper device of this embodiment is different from that of Example 1 in that: an annular groove 44 with a V-shaped cross section and an annular guide groove 43 with a triangular cross section are engraved on the inner side of the end near the center of the outer square inner circular piston 4; when the piston rod 1 moves centrifugally, the horizontal force generated by the contact surface between the ball head plug 14 and the V-shaped annular groove 44 is greater than the friction force between the outer square inner circular piston 4 and the friction plate. Example

[0038] like Figures 1-8 As shown, the centrifugal friction centripetal sliding damper device of this embodiment includes a cylindrical piston rod 1, and a cylindrical boss is provided in the middle of the piston rod 1; the two ends of the piston rod 1 pass through the outer square inner circular piston 4 and the circular hole in the middle of the end cover 2 on both sides of the cylindrical boss in sequence, and the cross-sections of the piston 4 and the two end covers 2 are both square outer and circular inner, and the inner sides of the two end covers 2 are provided with square bosses, and the four sides of the square bosses are fixed with long slide rails 3 with wedge-shaped cross sections; the four sides of the left and right square end covers 2 are fixedly connected by a rectangular flat plate 9, and the inner side of the rectangular flat plate 9 is engraved with a groove 91 with a trapezoidal cross section, and a folding spring 93 is provided in the groove 91, and the folding spring 93 is connected to the cylindrical roller 92; in the rectangular flat plate 9 A strip-shaped steel block 94 is fixed to the inner side of the intermediate portion, with long strip-shaped folding springs 7 connected to the left and right sides of the steel block 94. A stopper 8 is fixed to the side of the steel block 94 near the piston rod 1. The cross-section of the stopper 8 is square on the outside and circular on the inside, and each of the four outer sides is engraved with a long strip-shaped notch with a square cross-section. A long strip-shaped slide rail 3 with a wedge-shaped cross-section is fixed to the outer side immediately adjacent to the long strip-shaped notch. The piston 4 is surrounded by a flat friction plate 5. The friction plate 5 is fixed to the surface of the steel plate 6. The other surface of the steel plate 6 contacts the surface of the cylindrical roller 92. The inner ends of the steel plate 6 are sloped, and the sloped parts contact the surface of the long slide rail 3. The end of the steel plate 6 near the center is connected to the folding spring 7. The outer rectangular flat plate 9 and the end cover 2 are fixed together to form the device housing.

[0039] The cylindrical piston rod 1 is drilled with eight cylindrical holes, four on the left and four on the right. The four holes on the left are symmetrical to each other, and the four holes on the right are symmetrical to each other. The holes on both sides are also symmetrically distributed about the boss. There is a certain gap between the outer square inner circular piston 4 and the cylindrical piston rod 1.

[0040] In the centrifugal friction centripetal sliding damper device of the present invention, when the cylindrical piston rod 1 moves to one side, the piston 4 and the friction plate 5 on the other side are both stationary, and there is no relative displacement between the two. Figure 7 (FF section) is a cross-sectional view of the device in its initial state.

[0041] Working principle of the present invention:

[0042] One side of the cylindrical piston rod 1 of the present invention is fixed to a certain floor of the building structure, and the other end of the cylindrical piston rod 1 is passed through the hole at the bottom of the floor so that the end cover is fixed to the bottom of a certain floor. Under the action of horizontal seismic load, the building structure will produce relative displacement between floors, and the relative displacement between floors will be converted into relative displacement between the cylindrical piston rod 1 and the end cover 2 of the device. Since the rectangular plate 9 and the end cover 2 are fixed together, the relative displacement between floors of the building structure will be converted into displacement between the cylindrical piston rod 1 and the end cover 2. When the relative displacement between floors of the building structure occurs, we can equate it to the cylindrical piston rod performing centrifugal and centripetal motion. During the centrifugal motion of the cylindrical piston rod 1 (here taking the leftward motion of the cylindrical piston rod 1 as an example), the piston rod 1 slides to the left, driving the cylindrical roller 92 to move to the left, pressing the friction plate 5, and the left piston 4 contacts the surface of the friction plate 5 with a large pressure, generating a large friction force; the right piston 4 contacts the surface of the friction plate 5 but does not slide, and there is no friction force (the overall structural diagram of its motion process is shown in FIG. 1 ). Figure 9 ). The friction between the left outer circle inner square piston 4 and the friction plate 5 has a damping effect on the inter-story displacement of the building structure, thereby effectively consuming the seismic energy transmitted into the building structure, reducing the dynamic response of the structure under seismic loads, and increasing the energy consumption capacity of the structure. When the cylindrical piston rod 1 moves centripetally (here, the rightward movement of the cylindrical piston rod 1 is taken as an example), the piston rod 1 slides to the right, driving the cylindrical roller 92 to move to the right, loosening the friction plate 5, and the left piston 4 contacts the surface of the friction plate 5 with a very small pressure that is almost negligible, and the friction force is negligible; the right piston 4 contacts the surface of the friction plate 5 but does not slide, and there is no friction force (the overall structural diagram of its movement process is shown in the figure). Figure 10 This means that when the cylindrical piston rod 1 moves centripetally to the right and reaches its initial state, it has no damping effect on the building structure. Therefore, using this damper in building structure vibration reduction not only reduces energy consumption and vibration, but also eliminates the need for post-earthquake replacement or repair, significantly extending the device's lifespan while also saving costs.

[0043] The above description is only a preferred embodiment of the present invention, which is only a part of the embodiments of the present invention and not all of them, and does not constitute a limitation of the present invention. Based on the embodiments of the present invention, those skilled in the art can make other modifications to the implementation of the present invention under the guidance of the existing technology without creative work. Any modifications made within the spirit and principles of the present invention or all other embodiments obtained by simple replacement or equivalent substitution using conventional technical means in the field shall fall within the scope of protection of the present invention without departing from the overall technical concept of the present invention.

Claims

1. A centrifugal friction centripetal sliding damper device, comprising a device housing, a piston (4) and a friction plate (5), wherein the piston (4) is arranged on the piston rod on both sides of a cylindrical boss provided in the middle portion of the cylindrical piston rod (1); characterized in that: The device housing is fixed by two left and right end covers (2) and four rectangular flat plates (9) to form a closed chamber, in which a piston is arranged, and the two ends of the piston rod extend from the circular holes in the middle of the end covers on both sides; the cross-sections of the piston (4) and the two end covers (2) are both square outside and circular inside; A protruding strip steel block (94) is provided at the middle portion of the inner side of the rectangular flat plate (9), and an annular stopper (8) is provided at the outer side of the cylindrical boss at the middle portion of the piston rod. The cross-sectional shape of the stopper (8) is square outside and circular inside, and both ends of the four outer side surfaces are engraved with a long strip notch with a square cross section, and a long strip slide rail (3) with a wedge-shaped cross section is fixed to the outer side surface close to the long strip notch. The inner sides of the two end covers (2) are provided with square bosses, and the periphery of the square bosses is fixed with a long slide rail (3) with a wedge-shaped cross section; a long first folding spring (7) and a steel plate (6) are provided between the left and right sides of the strip steel block (94) outside the limit block (8) and the square bosses inside the two end covers (2); a flat friction plate (5) is fixed to the surface of the steel plate (6) and is arranged outside the piston (4); the outside of the slide rail and the limit block is provided with a folding spring and a rectangular flat plate; The inner side of the rectangular flat plate (9) is provided with a groove (91) with a trapezoidal cross section, and a second folding spring (93) and a matching cylindrical roller (92) are provided in the groove (91); the other surface of the steel plate (6) contacts the surface of the cylindrical roller (92), and the inner ends of the steel plate (6) are sloped, and the sloped parts contact the surface of the long slide rail (3), and the end of the steel plate (6) near the center is connected to the first folding spring (7).

2. The centrifugal friction centripetal sliding damper device according to claim 1, characterized in that: The piston rod (1) is provided with symmetrically distributed cylindrical holes (11) on both sides of the cylindrical boss near the middle part, and a telescopic spring (13) and a ball rod plug (14) are provided in the cylindrical hole (11). The ball end of the ball rod plug (14) extends out of the cylindrical hole (11), and the other end of the telescopic spring (13) is stuck in the hole through a limit pin (12).

3. The centrifugal friction centripetal sliding damper device according to claim 2, characterized in that: The first folding spring (7), the second folding spring (93) and the telescopic spring (13) are always in a compressed state. When the piston rod (1) is stationary, under the elastic force of the telescopic spring (13), the flat friction plate (5) and the outer square inner circle piston (4) are always in a contact state.

4. The centrifugal friction centripetal sliding damper device according to claim 1, 2 or 3, characterized in that: The diameter of the circle in the middle of the cross section of the limit block (8) is slightly larger than the cross section diameter of the cylindrical boss in the middle of the piston rod (1). The limit block (8) does not affect the left and right movement of the piston rod (1), and there is no contact between the two.

5. The centrifugal friction centripetal sliding damper device according to claim 1, 2 or 3, characterized in that: The contact surfaces between the cylindrical roller (92) and the steel plate (6), and between the steel plate (6) and the long slide rail (3) are smooth and frictionless, and the friction between the contact surfaces during movement is negligible.

6. The centrifugal friction centripetal sliding damper device according to claim 1, 2 or 3, characterized in that: An annular groove (44) with a V-shaped cross section and an annular guide groove (43) with a triangular cross section are engraved on the inner side of the end of the outer square inner circular piston (4) near the center; when the piston rod (1) moves centrifugally, the horizontal force generated by the contact surface between the ball head plug (14) and the V-shaped annular groove (44) is greater than the friction force between the outer square inner circular piston (4) and the friction plate.

7. The centrifugal friction centripetal sliding damper device according to claim 1, 2 or 3, characterized in that: The cross-sectional profile of the end cover (2), the piston (4) and the limit block (8) is square or rectangular.

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