Centrifugal friction centripetal sliding type damper device

Abstract

A centrifugal friction centripetal sliding type damper device comprises pistons and friction plates, and the pistons are arranged on piston rods on the two sides of a cylindrical boss in the middle of the piston rods. Two ends of the piston rod extend out of two side end covers; an annular limiting block is arranged on the outer side of a cylindrical boss in the middle of the piston rod, and wedge-shaped long-strip sliding rails are arranged on the two sides of the cylindrical boss. A first folding spring and a steel plate are arranged between the left side and the right side of a strip-shaped steel block outside the limiting block and a square boss on the inner side of the end cover, and a flat friction plate is fixed to the surface of the steel plate. A groove with a trapezoidal section is formed in the inner side of the rectangular flat plate forming the device shell, and a second folding spring and a matched cylindrical rolling shaft are arranged in the groove; the steel plate makes contact with the cylindrical rolling shaft, the inner side slope portion of the steel plate makes contact with the surface of the long-strip-shaped sliding rail, and the end, close to the center, of the steel plate is connected with a first folding spring. The energy dissipation and vibration reduction device is used in a recoverable functional structure of a building structure and can play a role in energy dissipation and vibration reduction, replacement and repair are not needed after an earthquake, and recovery of elastic deformation of the structure is not hindered.

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 centripetal 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 view of the shortcomings of the prior art, the present invention proposes a centrifugal friction centripetal sliding damper device, which is used in the energy-saving 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 need to be replaced or repaired after an earthquake, and does not hinder the recovery of the elastic deformation of the structure.

[0004] The technical solution adopted by the present invention is: 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 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 part 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 part 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 long strip notches with square cross-sections. A long strip slide rail (3) with a wedge-shaped cross-section is fixed to the outer side surface close to the long strip notches. 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 arranged outside the piston (4); the outside of the slide rail and the limit block is 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 arranged in the groove (91); 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), and the end of the steel plate (6) close to the center is connected to the first folding spring (7).

[0005] 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 arranged 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).

[0006] 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.

[0007] 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.

[0008] Beneficial effects of the invention: 1. The centrifugal friction centripetal sliding damper device of the present invention can provide additional damping force for the structure during centrifugal motion, and has no damping force during centripetal 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. 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), the damping force is large, the energy dissipation capacity is strong, and the friction force can be controlled by the deformation of the telescopic spring, which has strong applicability and high practical value.

[0009] 2. In the centrifugal friction centripetal sliding damper device of the present invention, when the cylindrical piston rod makes centrifugal motion to one side, the outer square inner circle piston on the other side contacts the surface of the friction plate but does not slide, and there is no friction. Therefore, it 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. It can better suppress the response of civil engineering structures under the action of a large earthquake and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the centrifugal friction centripetal sliding damper device of the present invention.

[0011] Figure 2 yes Figure 1 Schematic diagram of the AA section.

[0012] Figure 3 yes Figure 1 Schematic diagram of the BB section.

[0013] Figure 4 yes Figure 1 Schematic diagram of the CC section.

[0014] Figure 5 yes Figure 1 Schematic diagram of the DD section.

[0015] Figure 6 yes Figure 1 Schematic diagram of the EE section.

[0016] Figure 7 yes Figure 1 Schematic diagram of the FF cross section.

[0017] Figure 8 yes Figure 1 Schematic diagram of the GG section.

[0018] Fig. 9 It is a schematic diagram of the overall structure of the centrifugal motion process.

[0019] Fig.10 It is a schematic diagram of the overall structure of the centripetal motion process. DETAILED DESCRIPTION

[0020] 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

[0021] 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; The housing of the device 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 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 in the middle of the inner side of the rectangular flat plate 9, and an annular stopper 8 is provided on the outer side of the cylindrical boss in the middle 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 sides are engraved with long strip notches with square cross sections, and a long strip slide rail 3 with a wedge-shaped cross section is fixed on the outer side close to the long strip notches; The inner sides of the two end covers 2 are provided with square bosses, and the periphery of the square bosses is fixed with long slide rails with wedge-shaped cross sections; 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, long first folding springs 7 and steel plates 6 are provided, and the flat friction plate 5 is fixed on the surface of the steel plate 6 and arranged outside the piston 4; the outside of the slide rails and the limit blocks are folding springs and rectangular flat plates; 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 arranged 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 close to the center is connected to the first folding spring 7.

[0022] 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 can be ignored.

[0023] 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 through a limit pin 12.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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 sections. Example

[0028] See also Figure 1 The centrifugal friction centripetal sliding damper device of this embodiment is different from that of Embodiment 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 of the outer square inner circular piston 4 close to 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. Example

[0029] like Figure 1-Figure 8 As shown, the centrifugal friction centripetal sliding damper device of this embodiment comprises 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 turn, and the cross sections of the piston 4 and the two end covers 2 are both outer square inner circular, and the inner sides of the two end covers 2 are provided with square bosses, and the sides around 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 plate 9, and the inner side of the rectangular plate 9 is engraved with a groove 91 with a trapezoidal cross section, and the groove 91 has a folding spring 93, and the folding spring 93 is connected to the cylindrical roller 92; the rectangular plate 9 A strip steel block 94 is fixed on the inner side of the intermediate part, and a long strip folding spring 7 is connected to the left and right sides of the steel block 94. A stopper block 8 is fixedly connected to the side of the steel block 94 close to the piston rod 1; the cross-sectional shape of the stopper block 8 is square outside and circular inside, and both ends of the four outer sides are engraved with a long strip notch with a square cross section, and a long strip slide rail 3 with a wedge cross section is fixed to the outer side next to the long strip notch; the outer side of the piston 4 is a flat friction plate 5, which is fixed to the surface of the steel plate 6, and 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 part contacts the surface of the long strip slide rail 3. The end of the steel plate 6 close to the center is connected to the folding spring 7. The outer rectangular flat plate 9 and the end cover 2 are fixedly connected together to form the device housing.

[0030] The cylindrical piston rod 1 is drilled with 8 cylindrical holes on its periphery, 4 on the left side and 4 on the right side, the 4 on the left side are symmetrical to each other, the 4 on the right side are symmetrical to each other, and the holes on the left and right sides are also symmetrically distributed with respect to the boss. There is a certain gap between the outer square inner circular piston 4 and the cylindrical piston rod 1.

[0031] 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.

[0032] Working principle of the present invention: 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 centrifugal and centripetal motion of the cylindrical piston rod. During the centrifugal motion of the cylindrical piston rod 1 (here, the leftward motion of the cylindrical piston rod 1 is taken as an example), the piston rod 1 slides to the left, driving the cylindrical roller 92 to move to the left, pressing against the friction plate 5, and the left piston 4 contacts the surface of the friction plate 5 with great 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 ). Fig. 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 to the building structure, reducing the dynamic response of the structure under the action of 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 can be almost ignored, and the friction force can be ignored; 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). Fig.10 ). This means that when the cylindrical piston rod 1 moves centripetally to the right to the initial state, there is no damping effect on the building structure. Therefore, using this damper in the building structure efficiency shock absorption can not only play the role of energy consumption and vibration reduction, but also has the advantage of not needing to be replaced or repaired after the earthquake, thereby greatly extending the life of the device and also achieving the purpose of saving economic costs.

[0033] The above description is only a preferred embodiment of the present invention, which is only a part of the embodiments of the present invention but not all, 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 prior art without creative work, and any modifications made within the spirit and principles of the present invention or all other embodiments obtained by simple replacement or equivalent replacement using conventional technical means in the field, without departing from the overall technical concept of the present invention, should belong to the protection scope 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 arranged in the middle of a cylindrical piston rod (1); characterized in that: The housing of the device 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 part 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 part 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 long strip notches with square cross-sections. A long strip slide rail (3) with a wedge-shaped cross-section is fixed to the outer side surface close to the long strip notches. 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 arranged outside the piston (4); the outside of the slide rail and the limit block is 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 arranged in the groove (91); 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), and the end of the steel plate (6) close to 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, the flat friction plate (5) and the outer square inner circle piston (4) are always in a contact state under the elastic force of the telescopic spring (13).

4. The centrifugal friction centripetal sliding damper device according to claim 1, 2 or 3, characterized in that: 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-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 rod 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 profiles of the end cover (2), the piston (4) and the stop block (8) are in the shape of a square or a rectangle.

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