Double-order friction damper

Abstract

The utility model discloses a double-order friction damper which comprises a connecting piece, a first rotating plate, a second rotating plate and a friction damping pad. Heat generated in the friction process can be quickly dissipated through air flow in the first heat dissipation holes, the second heat dissipation holes and the third heat dissipation holes, the first rotating plate and the second rotating plate are prevented from being damaged due to too high heat, and then the service life of the double-order friction damper is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, and particularly relates to a two-stage friction damper. Background Art

[0002] A friction damper is an energy dissipation device attached to a structure. It dissipates energy through sliding friction and plays an energy dissipation and shock absorption role for the structure. During minor earthquakes, the structure itself has sufficient stiffness and is in an elastic state, and the friction damper does not generate slip. During moderate and major earthquakes, the structural deformation increases, and the friction damper generates slip, providing additional damping for the structure to dissipate energy and reduce shock, thereby protecting the safety of the main structure. For example, a self-resetting rotational friction damper disclosed in the application number CN202210313134.3 forms friction through rotation and consumes energy.

[0003] However, for current friction dampers, their friction components generate heat due to repeated friction. As the number of friction times increases, the friction components will be damaged, resulting in a change in the friction coefficient. Finally, the damping force cannot be guaranteed to be stable, reducing the service life of the friction damper. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a two-stage friction damper, which can dissipate the heat on the two-stage friction damper and improve the service life of the two-stage friction damper.

[0005] The two-stage friction damper according to the first aspect embodiment of the utility model includes a connecting member, a first rotating plate, a second rotating plate, and a friction damping pad;

[0006] There are two connecting members. The connecting member includes a horizontal plate and a vertical plate perpendicular to the horizontal plate. The vertical plates of the two connecting members are arranged oppositely. A rotating part is arranged at one end of the vertical plate away from the horizontal plate, and a plurality of arc-shaped sliding grooves are arranged at one end of the vertical plate close to the horizontal plate. The center of the sliding groove coincides with the rotation axis of the rotating part, and the plurality of sliding grooves are arranged at equal intervals around the rotation axis of the rotating part;

[0007] Both ends of the first rotating plate are rotatably connected to the two rotating parts of the two vertical plates respectively. Sector-shaped grooves are arranged at both ends of the first rotating plate. The center of the groove coincides with the rotation axis of the rotating part. The first rotating plate is provided with a plurality of first sliders penetrating through it. The first sliders are inserted into the sliding grooves and can slide along the sliding grooves;

[0008] There are two of the second rotating plates, the second rotating plates are fan-shaped, the end parts of the two second rotating plates are respectively rotatably connected to the two rotating parts, the second rotating plates are inserted with second sliders, and the second sliders are inserted into the sliding grooves and can slide along the sliding grooves;

[0009] The friction damping pads are arranged between the first rotating plate and the vertical plate, and between the second rotating plate and the vertical plate, and the friction damping pads are fixedly connected to the first rotating plate or the second rotating plate;

[0010] Wherein, a plurality of first heat dissipation holes are penetrated through the first rotating plate and the second rotating plate, a plurality of second heat dissipation holes are penetrated through the friction damping pads, the first heat dissipation holes and the second heat dissipation holes correspond to each other one by one, a plurality of third heat dissipation holes are penetrated through the vertical plate, and the first rotating plate or the second rotating plate can rotate so that the first heat dissipation holes and the third heat dissipation holes are correspondingly arranged, or the first heat dissipation holes and the third heat dissipation holes intersect.

[0011] The double-stage friction damper according to the embodiment of the present invention has at least the following beneficial effects: the heat generated during the friction process can be quickly dissipated through the air flow in the first heat dissipation holes, the second heat dissipation holes and the third heat dissipation holes, preventing the first rotating plate and the second rotating plate from being damaged due to excessive heat, and thus improving the service life of the double-stage friction damper.

[0012] According to some embodiments of the present invention, the first heat dissipation holes, the second heat dissipation holes and the third heat dissipation holes are all arranged at intervals around the rotation axis of the rotating part.

[0013] According to some embodiments of the present invention, there are two vertical plates, and the first rotating plate and the second rotating plate are clamped between the two vertical plates.

[0014] According to some embodiments of the present invention, both the first slider and the second slider are screw rods, the two ends of the screw rod are respectively penetrated through the sliding grooves of the two vertical plates, fastening nuts are sleeved on the two ends of the screw rod, and the two fastening nuts respectively abut against the surfaces of the two vertical plates.

[0015] According to some embodiments of the present invention, a gasket is clamped between the fastening nut and the surface of the vertical plate.

[0016] According to some embodiments of the present invention, a disc spring is clamped between the fastening nut and the surface of the vertical plate.

[0017] According to some embodiments of the present invention, there is a gap between the edge of the first rotating plate and the cross plate.

[0018] According to some embodiments of the present utility model, the second rotating plate can rotate so that both sides of the second rotating plate are respectively in contact with both sides of the groove, wherein buffer rubber pads are provided at both edges of the second rotating plate.

[0019] According to some embodiments of the present utility model, both the first slider and the second slider are cylindrical, and the width of the sliding groove is greater than the diameters of the first slider and the second slider.

[0020] According to some embodiments of the present utility model, the friction damping pad is made of a resin-based composite material.

[0021] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments, wherein:

[0023] Figure 1 is a schematic diagram of a two-stage friction damper according to an embodiment of the present utility model;

[0024] Figure 2 is an exploded schematic diagram of a connecting member, a first rotating plate and a second rotating plate of a two-stage friction damper according to an embodiment of the present utility model;

[0025] Figure 3 is Figure 2 an enlarged view of part A of

[0026] Figure 4 not Figure 2 an enlarged view of part B of

[0027] 100, connecting member; 110, horizontal plate; 120, vertical plate; 121, rotating part; 122, sliding groove;

[0028] 200, first rotating plate; 210, groove; 220, first slider;

[0029] 300, second rotating plate; 310, second slider;

[0030] 400, friction damping pad;

[0031] 510, first heat dissipation hole; 520, second heat dissipation hole; 530, third heat dissipation hole; 540, fastening nut; 541, gasket; Detailed Embodiments

[0032] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0034] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0035] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0036] Refer to Figures 1 to 4, the double-stage friction damper of the first embodiment of the present utility model includes a connecting member 100, a first rotating plate 200, a second rotating plate 300, and a friction damping pad 400; there are two connecting members 100, the connecting member 100 includes a horizontal plate 110 and a vertical plate 120 perpendicular to the horizontal plate 110, the vertical plates 120 of the two connecting members 100 are arranged opposite to each other, a rotating part 121 is provided at one end of the vertical plate 120 away from the horizontal plate 110, and a plurality of arc-shaped sliding grooves 122 are provided at one end of the vertical plate 120 close to the horizontal plate 110. The center of the sliding groove 122 coincides with the rotation axis of the rotating part 121, and the plurality of sliding grooves 122 are arranged at equal intervals around the rotation axis of the rotating part 121; both ends of the first rotating plate 200 are rotatably connected to the two rotating parts 121 of the two vertical plates 120 respectively. Sector-shaped grooves 210 are provided at both ends of the first rotating plate 200, and the center of the groove 210 coincides with the rotation axis of the rotating part 121. A plurality of first sliders 220 are provided through the first rotating plate 200. The first sliders 220 are inserted into the sliding grooves 122 and can slide along the sliding grooves 122; there are two second rotating plates 300, the second rotating plates 300 are sector-shaped, and the ends of the two second rotating plates 300 are respectively rotatably connected to the two rotating parts 121. Second sliders 310 are inserted into the second rotating plates 300. The second sliders 310 are inserted into the sliding grooves 122 and can slide along the sliding grooves 122; the friction damping pads 400 are arranged between the first rotating plate 200 and the vertical plate 120, and between the second rotating plate 300 and the vertical plate 120. The friction damping pads 400 are fixedly connected to the first rotating plate 200 or the second rotating plate 300; wherein, referring to Figure 3 and Figure 4 , a plurality of first heat dissipation holes 510 are provided through the first rotating plate 200 and the second rotating plate 300, a plurality of second heat dissipation holes 520 are provided through the friction damping pads 400, the first heat dissipation holes 510 and the second heat dissipation holes 520 correspond to each other one by one, and a plurality of third heat dissipation holes 530 are provided through the vertical plate 120. The first rotating plate 200 or the second rotating plate 300 can rotate so that the first heat dissipation holes 510 and the third heat dissipation holes 530 are correspondingly arranged, or the first heat dissipation holes 510 and the third heat dissipation holes 530 intersect. In the same connecting member 100, there are two vertical plates 120, and the first rotating plate 200 and the second rotating plate 300 are clamped between the two vertical plates 120. Both the first slider 220 and the second slider 310 are screws. The two ends of the screw are respectively inserted into the sliding grooves 122 of the two vertical plates 120, and fastening nuts 540 are sleeved on the two ends of the screw. The two fastening nuts 540 are respectively abutted against the surfaces of the two vertical plates 120. A gasket 541 is clamped between the fastening nut 540 and the surface of the vertical plate 120. A disc spring is clamped between the fastening nut 540 and the surface of the vertical plate 120. There is a gap between the edge of the first rotating plate 200 and the horizontal plate 110, and buffer rubber pads are provided on both side edges of the second rotating plate 300.

[0037] In the actual use process, two cross plates 110 are used to connect specific building structures. When subjected to vibrations (such as earthquake effects), misalignment occurs between the two cross plates 110, and at the same time, the vertical plate 120 is driven to generate misalignment. The first rotating plate 200 rotatably connected to the vertical plate 120 swings (pivots along the Figure 2 arrow direction around the rotating part 121, and at the same time, the first slider 220 slides along the chute 122). At this time, a first-order friction energy dissipation is generated between the friction damping pad 400 fixed on the first rotating plate 200 and the vertical plate 120. Preferably, the second rotating plate 300 can rotate so that both sides of the second rotating plate 300 are in contact with both sides of the groove 210 respectively. When the first rotating plate 200 swings to the edge of the groove 210 and the edge of the second rotating plate 300 is in contact, at this time, the second rotating plate 300 pivots around the rotating part 121 and generates a swing, and a second-order friction energy dissipation is generated between the friction damping pad 400 fixed on the second rotating plate 300 and the vertical plate 120. In addition, due to the contact and extrusion between the second rotating plate 300 and the first rotating plate 200, friction energy dissipation can also be generated, which also belongs to the second-order friction energy dissipation. Among them, the heat generated during the friction process can be quickly dissipated through the air flow in the first heat dissipation hole 510, the second heat dissipation hole 520 and the third heat dissipation hole 530, preventing the first rotating plate 200 and the second rotating plate 300 from being damaged due to excessive heat, thereby improving the service life of the double-stage friction damper. Among them, the first heat dissipation hole 510, the second heat dissipation hole 520 and the third heat dissipation hole 530 are all arranged at intervals around the rotation axis of the rotating part 121.

[0038] Specifically, in the same connecting piece 100, two vertical plates 120 are provided, and the first rotating plate 200 and the second rotating plate 300 are clamped between the two vertical plates 120 to improve the structural stability of the entire double-stage friction damper.

[0039] In some embodiments, both the first slider 220 and the second slider 310 are screws. The two ends of the screw are respectively inserted into the chutes 122 of the two vertical plates 120, and fastening nuts 540 are sleeved on the two ends of the screw. The two fastening nuts 540 are respectively in contact with the surfaces of the two vertical plates 120, which is used to improve the degree of fit between the vertical plates 120, the first rotating plate 200 and the second rotating plate 300. Preferably, in some embodiments, in order to further improve the degree of fit, a gasket 541 is clamped between the fastening nut 540 and the surface of the vertical plate 120. In other embodiments, in order to reduce pressure loss and improve the fit stability, a disc spring (not shown in the figure) is clamped between the fastening nut 540 and the surface of the vertical plate 120.

[0040] In some embodiments, in order to improve the heat dissipation efficiency of the entire two-stage friction damper, there is a gap between the edge of the first rotating plate 200 and the cross plate 110. A gap is provided between the edge of the first rotating plate 200 and the cross plate 110, so that there is a gap between the two ends of the entire two-stage friction damper. During the movement of the first rotating plate 200 and the second rotating plate 300, the air inside can be driven to flow in the gaps on both sides, further improving the heat dissipation effect on the first rotating plate 200, the second rotating plate 300, and the vertical plate 120.

[0041] Wherein, buffer rubber pads (not shown in the figure) are provided on both side edges of the second rotating plate 300 for improving frictional energy dissipation.

[0042] In the above embodiments, the first slider 220 and the second slider 310 are bolts, and the bolts are cylindrical. In this embodiment, the width of the sliding groove 122 is greater than the diameters of the first slider 220 and the second slider 310. In addition, in some other embodiments, the first slider 220 and the second slider 310 are both cylindrical pin shafts for cooperating with the sliding groove 122, and the width of the sliding groove 122 is greater than the diameters of the first slider 220 and the second slider 310.

[0043] In some embodiments, the friction damping pad 400 is made of a resin-based composite material.

[0044] It should be mentioned that, as the second embodiment of the present invention, a further improvement is made to the above first embodiment. Referring to Figure 2 the above-mentioned rotating part 121 can be a rotating shaft that penetrates the vertical plate 120, the first rotating plate 200, and the second rotating plate 300 at the same time. The rotating shaft is fixed on the vertical plate 120, and both the first rotating plate 200 and the second rotating plate 300 are rotatably connected to the rotating shaft.

[0045] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A two-stage friction damper, characterized in that It includes a connecting member (100), a first rotating plate (200), a second rotating plate (300) and a friction damping pad (400); There are two of the connecting members (100). The connecting member (100) includes a cross plate (110) and a vertical plate (120) perpendicular to the cross plate (110). The vertical plates (120) of the two connecting members (100) are arranged oppositely. A rotating portion (121) is provided at one end of the vertical plate (120) away from the cross plate (110). A plurality of arc-shaped sliding grooves (122) are provided at one end of the vertical plate (120) close to the cross plate (110). The center of the sliding groove (122) coincides with the rotation axis of the rotating portion (121). The plurality of sliding grooves (122) are arranged at equal intervals around the rotation axis of the rotating portion (121); Both ends of the first rotating plate (200) are rotatably connected to the two rotating portions (121) of the two vertical plates (120) respectively. Sector-shaped grooves (210) are provided at both ends of the first rotating plate (200). The center of the groove (210) coincides with the rotation axis of the rotating portion (121). A plurality of first sliding blocks (220) are provided through the first rotating plate (200). The first sliding blocks (220) are inserted into the sliding grooves (122) and can slide along the sliding grooves (122); There are two of the second rotating plates (300). The second rotating plate (300) is sector-shaped. The ends of the two second rotating plates (300) are rotatably connected to the two rotating portions (121) respectively. Second sliding blocks (310) are inserted into the second rotating plates (300). The second sliding blocks (310) are inserted into the sliding grooves (122) and can slide along the sliding grooves (122); The friction damping pad (400) is arranged between the first rotating plate (200) and the vertical plate (120), and between the second rotating plate (300) and the vertical plate (120). The friction damping pad (400) is fixedly connected to the first rotating plate (200) or the second rotating plate (300); Wherein, a plurality of first heat dissipation holes (510) are provided through the first rotating plate (200) and the second rotating plate (300). A plurality of second heat dissipation holes (520) are provided through the friction damping pad (400). The first heat dissipation holes (510) and the second heat dissipation holes (520) correspond to each other one by one. A plurality of third heat dissipation holes (530) are provided through the vertical plate (120). The first rotating plate (200) or the second rotating plate (300) can rotate so that the first heat dissipation holes (510) and the third heat dissipation holes (530) are arranged corresponding to each other, or the first heat dissipation holes (510) and the third heat dissipation holes (530) intersect; 2. The two-stage friction damper according to claim 1, characterized in that, The first heat dissipation holes (510), the second heat dissipation holes (520) and the third heat dissipation holes (530) are all arranged at intervals around the rotation axis of the rotating portion (121).

3. The two-stage friction damper according to claim 1, wherein There are two vertical plates (120), and the first rotating plate (200) and the second rotating plate (300) are clamped between the two vertical plates (120).

4. The two-stage friction damper according to claim 3, wherein The first slider (220) and the second slider (310) are both screws. The two ends of the screw are respectively inserted into the sliding grooves (122) of the two vertical plates (120), and fastening nuts (540) are sleeved on the two ends of the screw. The two fastening nuts (540) are respectively in contact with the surfaces of the two vertical plates (120).

5. The two-stage friction damper according to claim 4, characterized in that, A gasket (541) is clamped between the fastening nut (540) and the surface of the vertical plate (120).

6. The two-stage friction damper according to claim 4, characterized in that, A disc spring is clamped between the fastening nut (540) and the surface of the vertical plate (120).

7. The two-stage friction damper according to claim 4, characterized in that, There is a gap between the edge of the first rotating plate (200) and the horizontal plate (110).

8. The two-stage friction damper according to claim 1, wherein The second rotating plate (300) can rotate so that both sides of the second rotating plate (300) are respectively in contact with both sides of the groove (210). Among them, buffer rubber pads are provided at both edges of the second rotating plate (300).

9. The double-stage friction damper according to claim 1, characterized in that, The first slider (220) and the second slider (310) are both cylindrical, and the width of the sliding groove (122) is greater than the diameters of the first slider (220) and the second slider (310).

10. The two-stage friction damper according to claim 1, characterized in that, The friction damping pad (400) is made of a resin-based composite material.

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