CN114790848B - Connecting rod mechanism type variable friction self-resetting damper - Google Patents
Connecting rod mechanism type variable friction self-resetting damper Download PDFInfo
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- CN114790848B CN114790848B CN202210423241.1A CN202210423241A CN114790848B CN 114790848 B CN114790848 B CN 114790848B CN 202210423241 A CN202210423241 A CN 202210423241A CN 114790848 B CN114790848 B CN 114790848B
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
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- 230000009471 action Effects 0.000 abstract description 10
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- 239000000956 alloy Substances 0.000 description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
Abstract
The invention discloses a connecting rod mechanism type variable friction self-resetting damper. The variable friction self-resetting damper comprises two driving rods, four driven rods, eight pairs of friction discs, high-strength bolts and a disc spring group formed by overlapping/involution. The four driven rods are respectively connected with the two driving rods to form a rotatable parallelogram link mechanism. The friction disc contains a plurality of logarithmic ramp surfaces so that the friction force is continuously changed. The inner friction disk is welded on two sides of the driving rod, and the outer friction disk is welded on the inner side of the driven rod. The disc spring formed by overlapping/butt joint between the outer side of the driven rod and the high-strength connecting bolt generates pre-pressure for the variable slope surface under the action of the pre-tightening force of the bolt so that the variable slope surface is self-reset. The self-resetting friction-changing damper can realize energy consumption and nondestructive recovery of a structure under small and medium shocks, and has good self-resetting capability under large shocks. The self-resetting friction-changing damper has the advantages of simple structure, convenient construction, convenient installation, cost saving and wide engineering application prospect.
Description
Technical Field
The invention relates to the technical field of building structure engineering earthquake resistance, in particular to a connecting rod mechanism type variable friction self-resetting damper.
Background
The building structure often generates larger residual deformation after encountering the earthquake action, and how to reduce the residual deformation of the structure under the earthquake action and even not generate the residual deformation can have important effects on reducing the influence of the earthquake action on the structure and ensuring the safety of the structure. Therefore, the self-resetting of the structure becomes an important means for solving the problem of large residual deformation of the structure.
At present, although the existing self-resetting viscous damper and the self-resetting metal yielding damper can enable the structure to have good self-resetting capability under the action of an earthquake, due to the fact that damping force and speed generated by the self-resetting viscous damper are related, phase differences exist between acting force and damping force provided by resetting, and particularly the self-resetting of the structure is seriously delayed and even residual deformation occurs under the action of high frequency. The self-resetting metal yielding damper needs to be considered in design that the self-resetting device can provide larger restoring force to overcome the resetting resistance of the energy dissipation device, and the energy dissipation capability of the self-resetting metal yielding damper in the case of heavy earthquake is limited. The self-resetting friction damper dissipates energy through the friction force generated by mutual friction of self materials and is matched with a resetting mechanism to achieve the purpose of energy consumption and shock absorption of the structure. The self-resetting friction damper is favored by a plurality of researchers because of the characteristics of simple structure, easy material acquisition, low cost and the like.
Most of the existing self-resetting friction dampers use new materials such as prestressed tendons or shape memory alloys for self-resetting. However, the prestressing device has some complex technical characteristics, and new materials such as shape memory alloy and the like cannot be widely applied to engineering practice at present, so that the conventional self-resetting friction damper has some defects in the application of the self-resetting structure. Therefore, research on a novel, reliable and applicable friction type self-resetting device has an important influence on the design of the structure.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides a connecting rod mechanism type variable friction self-resetting damper, wherein a belleville spring group formed by overlapping/involution between the outer side of a driven rod and a high-strength connecting bolt generates pre-compression for a variable slope under the action of bolt pre-compression force so as to enable the variable slope to self-reset, the energy consumption and the lossless recovery of a structure under a medium and small earthquake can be realized, and the self-resetting damper also has good self-resetting capability under a large earthquake.
In order to solve the technical problems, the invention adopts the following technical scheme:
a connecting rod mechanism type variable friction self-resetting damper comprises two driving rods, four driven rods, a self-resetting damping mechanism and a plurality of high-strength bolts; two driving rods are arranged in parallel, four driven rods are arranged in pairs, two driven rods in each group are connected to two sides of the driving rod respectively, one end of each driven rod is connected to one driving rod, the other end of the same driven rod is connected to the other driving rod, the driving rod and the driven rods are connected according to a parallelogram through high-strength bolts, corresponding bolt holes are formed in the driving rod and the driven rods, the central holes of the bolt holes in the driving rod are round holes, surrounding bolt holes are arc-shaped long round holes, the driving rod and the driven rods form a rotatable parallelogram connecting rod mechanism, and the driving rod and the driven rods reset and consume energy through a self-resetting damping mechanism after rotating relatively.
As a further preferred aspect of the present invention, the self-resetting mechanism includes eight pairs of friction disc assemblies and disc spring groups; each pair of friction disc assemblies comprises an inner friction disc and an outer friction disc, a plurality of corresponding variable slopes are arranged on the surface of one side, opposite to the inner friction disc, of the outer friction disc, the variable slopes of the inner friction disc and the variable slopes of the outer friction disc can be mutually matched, the friction disc assemblies are arranged between a driven rod and a driving rod, the inner friction disc is welded on two sides of the driving rod, the outer friction disc is welded on the inner side of the driven rod, an arc-shaped long round hole and a round hole corresponding to the driving rod are formed in the inner friction disc, a bolt hole corresponding to the driven rod is formed in the outer friction disc, a high-strength bolt sequentially penetrates through the bolt hole of the driven rod, the bolt hole of the outer friction disc, the arc-shaped long round hole or the round hole of the inner friction disc, the arc-shaped long round hole or the round hole of the driving rod, the arc-shaped long round hole or the bolt hole of the other inner friction disc and the bolt hole of the other driven rod; the disc spring group is sleeved on the bolt rod of the high-strength bolt, one end of the disc spring group is contacted with a nut or a nut at one end of the high-strength bolt, the other end of the disc spring group is contacted with the outer surface of the driven rod, and the high-strength bolt applies initial pre-compression force between the pair of friction disc assemblies through the disc spring group.
As a further preferable aspect of the present invention, the degree of the minimum lift angle of the slope surface is a, and the friction coefficient between the inner friction disc and the outer friction disc and the slope surface of the slope surface is b, and the conditions that the inner friction disc and the outer friction disc need to satisfy when the disc spring set is under the pre-pressing condition are: tan a > b.
As a further preferable aspect of the present invention, a pin hole is formed at one end of the driving rod.
As a further preferred aspect of the invention, each pair of friction disk assemblies contains 5 connecting high strength bolts, each of which applies an initial pre-compression force of F bolt The height of the variable slope top from the slope bottom is L, and the diameter of the inner ring bolt hole is R 1 The distance between the inner side wall of the outer ring bolt hole and the center of the friction disk is R 2 The distance between the outer side wall of the outer ring bolt hole and the center of the friction disk is R 3 The outer diameter of the friction disk is R 4 The rising angles of the slope surfaces at the outer diameters are respectively theta 1 ，θ 2 ，θ 3 And theta 4 The central angle corresponding to the single slope isThe friction coefficient between the sloping surfaces is mu, the friction disk is equally divided into a plurality of parts by the distance delta R from inside to outside, so that n friction areas can be formed, the radius of any friction area of the friction disk is R, and the starting torque of the self-resetting support is
In a further preferred aspect of the present invention, the driving rod and the driven rod are made of Q355 steel.
In a further preferred aspect of the present invention, the inner friction plate and the outer friction plate are made of the same material, and are 45 steel or 40 chromium.
The invention has the following beneficial effects:
(1) The self-resetting friction damper adopts the variable slope friction disc to realize friction energy consumption, can realize nondestructive recovery under small and medium shocks, and has good self-resetting capability under large shocks; meanwhile, the self-resetting friction-changing damper has the characteristic of friction change, and the rotation angle of the friction disc is increased along with the increase of the relative displacement of the driving rod, so that the friction force of the friction disc is increased sharply, and the energy consumption capacity under different earthquake conditions of medium earthquake and large earthquake is met.
(2) The invention uses the elastic potential energy accumulated by the disc spring to self-reset the pressure provided by the variable slope of the friction disc. The nondestructive recovery under small and medium earthquakes is ensured, and the recovery capability under large earthquakes is still good. Compared with self-resetting materials such as SMA wires and prestressed steel bars, the butterfly spring used in the invention is a standard component and has wider applicability.
(3) The connecting rod mechanism type variable friction self-resetting damper can be applied to common frame supports, is simple in structural form and convenient to assemble, and can flexibly select parameters such as the diameter of a friction disc, the lift angle of a variable slope, the number of bolts, the specification of disc springs, the number of overlapping/involution and the like according to design requirements to adjust the energy consumption capacity and the rigidity of the self-resetting variable friction damper.
Drawings
FIG. 1 is a three-dimensional schematic view of a linkage-type variable friction self-resetting damper of the present invention;
FIG. 2 is a schematic view of the disassembled structure of FIG. 1;
FIG. 3 is a schematic plan view of xoz of FIG. 1;
FIG. 4 is a schematic plan view of yoz of FIG. 1;
FIG. 5 is a schematic plan view of the xoy of FIG. 1;
FIG. 6 is a three-dimensional schematic of an active rod;
FIG. 7 is a three-dimensional schematic of a follower rod;
FIG. 8 is a three-dimensional schematic of an inner friction disk;
FIG. 9 is a three-dimensional schematic of an outer friction disk;
FIG. 10 is a schematic view of a friction disk in radial bisection;
fig. 11 is a diagram of friction disc lift angle geometry calculation.
The method comprises the following steps: 1: a driving rod; 2: a driven rod; 3: an inner friction plate; 4: an outer friction plate; 5: a disc spring group; 6: a high-strength bolt; 7: pin holes.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As shown in fig. 1 to 11, a link mechanism type variable friction self-resetting damper comprises two driving rods 1, four driven rods 2, a self-resetting mechanism and a plurality of high-strength bolts 6. Two driving rods 1 parallel arrangement, four driven rods 2 are two by two in a set, two driven rods 2 in each set are connected in the both sides of driving rod 1 respectively, one end of driven rod 2 is connected on one driving rod 1, the other end of same driven rod 2 is connected on another driving rod 1, driving rod 1 is connected according to the parallelogram with driven rod 2 through high strength bolt 6, all offer corresponding bolt hole on driving rod 1 and the driven rod 2, and the centre bore of the bolt hole on driving rod 1 is the round hole, the bolt hole on every side is the arc slotted hole, driving rod 1 and driven rod 2 form rotatable parallelogram link mechanism, driving rod 1 and driven rod 2 take place relative rotation after reaching the start-up moment, reset and consume energy through the self-restoring damping mechanism. As shown in fig. 1, the x direction of the coordinate axis in the drawing is the setting direction of the driving rod 1, the y direction is the connecting direction of the high strength bolt 6, z is the vertical direction, and the x, y and z axes intersect at the O point.
A pin hole 7, a first bolt hole group and a second bolt hole group are sequentially arranged on the driving rod 1, one bolt hole group comprises a central hole and surrounding bolt holes, the central hole is a round hole, and the surrounding bolt holes are arc-shaped long round holes. The two ends of the driven rod 2 are provided with bolt hole groups, and the number of the bolt holes of the driving rod 1 and the driven rod 2 is set according to the required high-strength bolts 6. The setting direction of two driving rods 1 is opposite, driven rod 2 one end is connected in the first bolt group of a driving rod 1 through high strength bolt 6, and the other end of same driven rod 2 is connected in the second bolt group of driving rod 1 through high strength bolt 6, forms parallelogram link mechanism as shown in figure 1, strengthens the deformation harmony of driving rod 1.
The self-resetting mechanism comprises eight pairs of friction disc assemblies and disc spring groups 5; each pair of friction disc assemblies comprises an inner friction disc 3 and an outer friction disc 4, a plurality of corresponding variable slope surfaces are arranged on the surface of one side, opposite to the surface of the inner friction disc 3 and the surface of one side, opposite to the surface of the outer friction disc 4, of the inner friction disc 3 and the surface of the outer friction disc 4 are mutually anastomosed in an initial state, the friction disc assemblies are arranged between a driven rod 2 and a driving rod 1, the inner friction disc 3 is welded on two sides of the driving rod 1, the outer friction disc 4 is welded on the inner side of the driven rod 2, an arc slotted hole and a round hole corresponding to the driving rod 1 are formed in the inner friction disc 3, a round bolt hole corresponding to the driven rod 2 is formed in the outer friction disc 4, and a high-strength bolt 6 sequentially penetrates through the bolt hole of the driven rod 2, the round hole or the arc slotted hole of the inner friction disc 3, the arc slotted hole or the round hole of the driving rod 1, the arc slotted hole or the round hole of the other inner friction disc 3, the bolt hole of the other outer friction disc 4 and the bolt hole of the other driven rod 2. The high-strength bolts 6 are used for connecting the driving rod 1 and the driven rod 2 of the friction disc which are matched with each other initially, and the number and the types of the bolts are comprehensively considered according to design requirements. The heights of the top and the bottom of the inner and outer annular sloping surfaces of the friction disk are the same, so that the sloping surfaces of the inner and outer friction disks 4 are variable sloping surfaces, and variable friction is realized in the rotating process.
The disc spring group 5 is formed by combining a plurality of disc springs, the disc spring group 5 is sleeved on a bolt rod of the high-strength bolt 6, one end of the disc spring group 5 is in contact with a nut or a nut at one end of the high-strength bolt 6, the other end of the disc spring group 5 is in contact with the outer surface of the driven rod 2, the high-strength bolt 6 applies initial pre-compression force between a pair of friction disc assemblies through the disc spring group 5, the disc spring group 5 is in a compressed state in an initial state, and two sides of the driving rod 1 are of symmetrical structures. The disc spring group formed by overlapping/involution provides pre-pressure for the variable slope surface of the friction disc, so that the variable slope surface of the friction disc is self-reset, the types, the overlapping/involution quantity and the mode of the disc springs can be selected according to the high-strength bolts 6 used, the required rigidity deformation and the like, and the disc spring group is defaulted as a standard component.
The degree of the minimum lift angle of the slope surface of the variable slope surface is a, the friction coefficient between the inner friction disc and the outer friction disc variable slope surface is b, and the conditions which need to be met when the inner friction disc and the outer friction disc can be reset under the prestress of the disc spring group are as follows: tan a > b. When the tangent value of the minimum lift angle of the slope surface is larger than the friction coefficient between the friction surfaces, the pair of friction disc assemblies can realize self-resetting under the pre-compression force of the disc spring group 5.
The pin holes 7 are formed in one ends of the two driving rods 1, and the driving rods 1 can be hinged with an external building structure through the end pin holes 7.
If each pair of friction disk assemblies contains 5 high strength bolts 6, each high strength bolt 6 applies an initial pre-compression force of F bolt The height of the variable slope top from the slope bottom is L, and the diameter of the inner ring bolt hole is R 1 The distance between the inner side wall of the outer ring bolt hole and the center of the friction disk is R 2 The distance between the outer side wall of the outer ring bolt hole and the center of the friction disk is R 3 The outer diameter of the friction disk is R 4 The rising angles of the slope surfaces at the outer diameters are respectively theta 1 ，θ 2 ，θ 3 And theta 4 The central angle corresponding to the single slope isThe friction coefficient between the sloping surfaces is mu, and the friction disc is equally divided into a plurality of parts by the distance delta R from inside to outside, so that n friction areas can be formed.
The height L of the slope top from the slope bottom and the central angle corresponding to the single slope surfaceThe relationship between the radius R of any friction area of the friction disk and the lift angle theta of the slope surface at each outer diameter is that
The proposal is further supplemented to explain that the number n of friction areas and the diameter R of bolt holes of the inner ring 1 Distance R between inner side wall of outer ring bolt hole and center of friction disk 2 Distance R between outer side wall of outer ring bolt hole and center of friction disk 3 Outer diameter R of friction disk 4 And the relationship between the delta R of the friction disk from the inside to the outside is that
To the above-mentioned prescriptionAs a further supplementary explanation, the variable friction self-resetting damper comprises 8 pairs of friction plates, and the starting torque M slip Friction force F corresponding to each friction area c The product of the radius R, the starting torque is about
Further to the above proposal, when DeltaR tends to 0, the calculation result is the accurate solution of the starting torque of the self-resetting variable friction damper
Further to the above proposal, the starting torque which can be obtained from the resetting node by utilizing the relation between the height L of the slope top from the slope bottom and the number n of the friction areas is as follows
When the torque between the driving rod 1 and the driven rod 2 is greater than M slip At this time, the self-resetting friction damper starts the start-up operation.
The driving rod 1 and the driven rod 2 are made of Q355 steel, Q355 is low-alloy high-strength structural steel, and is widely applied to bridges, vehicles, ships, buildings, pressure vessels, special equipment and the like, wherein Q means yield strength, 355 means that the yield strength of the steel is 355MPa, and the yield value of the steel is reduced along with the increase of the thickness of the material. The inner friction disc 3 and the outer friction disc 4 are made of the same material and are 45 steel or 40 chromium, and the 45 steel is characterized by higher strength and deformation resistance compared with the common A3 steel; chromium 40 is one of the most widely used alloy structural steels in the machine industry. The modified alloy has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity after quenching and tempering. The hardenability of the steel is good.
The invention provides a connecting rod mechanism type variable friction self-resetting damper. The variable friction self-resetting damper comprises two driving rods 1, four driven rods 2 and eight pairs of friction discs (each pair of friction discs comprises an outer friction disc 4 and an inner friction disc 3), and is connected with a high-strength bolt 6 and a disc spring group 5 formed by overlapping/involution. The elastic potential energy accumulated by the disc spring is utilized to enable the slope surface of the friction disc to realize self-resetting. The friction-variable self-resetting damper can realize nondestructive recovery under small and medium shocks and has good self-resetting capability under large shocks; meanwhile, the friction-variable self-resetting damper has the characteristic of friction change, and the rotation angle of the friction disc is increased along with the increase of the displacement of the driving rod 1, so that the friction force is increased sharply, and the energy consumption capability under different earthquake conditions of small earthquake and large earthquake is met.
When the external building structure is greatly deformed, the two driving rods 1 are driven to generate linear motion, and the parallelogram linkage mechanism formed by the two driving rods 1 and the four driven rods 2 can generate rotation at the joint, so that the inner friction disc 3 and the corresponding outer friction disc 4 respectively generate rotation. The outer side of the outer friction disk 4 is provided with a disc spring group 5, the disc spring groups 5 on one side of each high-strength bolt 6 are connected in parallel to form the disc spring group 5 on one side of the friction disk, and the flattening deformation of each disc spring group 5 is in the allowable rotation angle range of the inner friction disk 4 and the outer friction disk 4, so that the connection safety of the damper is ensured. The inner friction disc 3 and the outer friction disc 4 rotate along the variable slope under the action of the pre-pressing force of the high-strength bolts 6 to consume energy, and the disc spring group 5 generates elastic deformation under the action of the pre-pressing force of the high-strength bolts 6 to provide restoring force. The range of the arc-shaped oblong holes in the inner friction disc 3 can limit the rotation angle of the inner friction disc 4 and the outer friction disc 4 not to exceed the angle corresponding to the single friction surface of the friction disc.
The working principle of the invention is as follows:
firstly, the components of the invention are assembled according to the diagram shown in fig. 1, then the two driving rods 1 are hinged on the building structure through the pin holes 7, when the external building structure is greatly deformed, the two driving rods 1 are driven to generate linear motion, the parallelogram linkage mechanism formed by the two driving rods 1 and the four driven rods 2 can generate rotation at the joint, and the high-strength bolt 6 moves in the arc-shaped oblong hole. Since the friction disc is welded with the driving rod 1 or the driven rod 2, the inner friction disc 3 and the outer friction disc 4 which are in initial fit also rotate relatively at the moment, the opposite surfaces of the inner friction disc 3 and the outer friction disc 4 are provided with variable slopes, the inner friction disc 3 and the outer friction disc 4 are not fit any more when rotating, the distance is increased, the driven rod 2 is caused to slide outwards, at the moment, one end of the disc spring group 5 is in contact with the driven rod 2, the disc spring group 5 is further compressed due to the outward sliding of the driven rod 2, at the moment, the elasticity applied to the driven rod 2 by the disc spring group 5 is increased, and the force between the outer friction disc 4 and the inner friction disc 3 is further increased. And the degree of the slope angle of rise is larger than the degree of the critical friction angle, under the action of the elasticity of the disc spring group 5, the inner friction disc 3 and the outer friction disc 4 are self-reset, namely the initial anastomosis state is restored, and the corresponding driving rod 1 and driven rod 2 are restored to the initial positions, so that the self-reset of the building structure is realized.
The self-resetting friction-changing damper can realize the energy consumption and the nondestructive recovery of a structure under small and medium shocks in performance by the advantages of friction changing and resetting, and has good self-resetting capability under large shocks. The self-resetting friction damper has the advantages of simple structure, convenience in construction, convenience in installation, cost saving and wide engineering application prospect.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.
Claims (5)
1. A link mechanism type variable friction self-resetting damper is characterized in that: the self-resetting damping device comprises two driving rods (1), four driven rods (2), a self-resetting damping mechanism and a plurality of high-strength bolts (6); the driving rods (1) are arranged in parallel, the four driven rods (2) are arranged in a group in pairs, the two driven rods (2) in each group are respectively connected to two sides of the driving rods (1), one end of each driven rod (2) is connected to one driving rod (1), the other end of the same driven rod (2) is connected to the other driving rod (1), the driving rods (1) and the driven rods (2) are connected in a parallelogram manner through high-strength bolts (6), corresponding bolt holes are formed in the driving rods (1) and the driven rods (2), the central holes of the bolt holes in the driving rods (1) are round holes, surrounding bolt holes are arc-shaped long round holes, the driving rods (1) and the driven rods (2) form rotatable parallelogram connecting rod mechanisms, and after relative rotation, the driving rods (1) and the driven rods (2) are reset and consume energy through self-resetting damping mechanisms;
the self-resetting damping mechanism comprises eight pairs of friction disc assemblies and disc spring groups (5); each pair of friction disc assemblies comprises an inner friction disc (3) and an outer friction disc (4), a plurality of corresponding variable slope surfaces are arranged on the surface of one side, opposite to the inner friction disc (3) and the outer friction disc (4), of each friction disc assembly, the variable slope surfaces of the inner friction disc (3) and the outer friction disc (4) can be mutually matched, the friction disc assemblies are arranged between the driven rod (2) and the driving rod (1), the inner friction disc (3) is welded on two sides of the driving rod (1), the outer friction disc (4) is welded on the inner side of the driven rod (2), an arc long round hole and a round hole corresponding to the driving rod (1) are formed in the inner friction disc (3), a bolt hole corresponding to the driven rod (2) is formed in the outer friction disc (4), and a high-strength bolt (6) sequentially penetrates through the bolt hole of the driven rod (2), the arc long round hole or the round hole of the driving rod (1), the arc long round hole of the other inner friction disc (3), and the bolt hole of the other outer friction disc (4) and the bolt hole of the driven rod (2) are sequentially formed in the bolt hole of the other outer friction disc (4); the disc spring group (5) is sleeved on a bolt rod of the high-strength bolt (6), one end of the disc spring group (5) is in contact with a nut or a nut at one end of the high-strength bolt (6), the other end of the disc spring group (5) is in contact with the outer surface of the driven rod (2), and the high-strength bolt (6) applies initial pre-compression force between friction disc assemblies through the disc spring group (5);
each pair of friction disk assemblies comprises 5 high-strength bolts (6), and the initial pre-compression force applied by each high-strength bolt (6) is F bolt The height of the variable slope top from the slope bottom is L, and the diameter of the inner ring bolt hole is R 1 The distance between the inner side wall of the outer ring bolt hole and the center of the friction disk is R 2 The distance between the outer side wall of the outer ring bolt hole and the center of the friction disk is R 3 The outer diameter of the friction disk is R 4 The rising angles of the slope surfaces at the outer diameters are respectively theta 1 ，θ 2 ，θ 3 And theta 4 The central angle corresponding to the single slope isThe friction coefficient between the sloping surfaces is mu, the friction disk is equally divided into a plurality of parts by the distance delta R from inside to outside, so that n friction areas can be formed, the radius of any friction area of the friction disk is R, and the starting torque of the variable friction self-resetting damper is
2. The linkage variable friction self-resetting damper as defined in claim 1, wherein: the degree of the minimum slope angle of the variable slope is a, the friction coefficient between the variable slope of the inner friction disc (3) and the variable slope of the outer friction disc (4) is b, and the conditions which the inner friction disc (3) and the outer friction disc (4) can meet when the disc spring group (5) is under pre-pressing and can be self-reset are as follows: tan a > b.
3. The linkage variable friction self-resetting damper as defined in claim 1, wherein: one end of the driving rod (1) is provided with a pin hole (7).
4. The linkage variable friction self-resetting damper as defined in claim 1, wherein: the driving rod (1) and the driven rod (2) are made of Q355 steel.
5. The linkage variable friction self-resetting damper as defined in claim 1, wherein: the inner friction disc (3) and the outer friction disc (4) are made of the same material and are made of 45 steel or 40 chromium.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080111425A (en) * | 2008-11-20 | 2008-12-23 | 유암이엔씨(주) | Multi-point type friction damper and earthquake-proof stiffening device |
| JP2010037905A (en) * | 2008-08-08 | 2010-02-18 | Takenaka Komuten Co Ltd | Connected seismic control structure and building |
| CN102051925A (en) * | 2009-11-04 | 2011-05-11 | 青岛理工大学 | Memory alloy damping controller |
| KR101134911B1 (en) * | 2011-08-31 | 2012-04-09 | 씨엠알기술연구원(주) | Displacement amplified linear damper assembly with rotation damper for reducing seismic energy |
| KR20130029506A (en) * | 2011-09-15 | 2013-03-25 | 씨엠알기술연구원(주) | Reciprocating friction damper and earthquake energy dissipation system |
| KR20130093964A (en) * | 2012-02-15 | 2013-08-23 | 주식회사 에이브이티 | Complex friction damper |
| WO2017090824A1 (en) * | 2015-11-27 | 2017-06-01 | 인천대학교 산학협력단 | Energy dissipation-type elastomer friction damper |
| CN108468392A (en) * | 2018-04-10 | 2018-08-31 | 同济大学 | Rotation Self-resetting energy-consuming device |
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
-
2022
- 2022-04-21 CN CN202210423241.1A patent/CN114790848B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010037905A (en) * | 2008-08-08 | 2010-02-18 | Takenaka Komuten Co Ltd | Connected seismic control structure and building |
| KR20080111425A (en) * | 2008-11-20 | 2008-12-23 | 유암이엔씨(주) | Multi-point type friction damper and earthquake-proof stiffening device |
| CN102051925A (en) * | 2009-11-04 | 2011-05-11 | 青岛理工大学 | Memory alloy damping controller |
| KR101134911B1 (en) * | 2011-08-31 | 2012-04-09 | 씨엠알기술연구원(주) | Displacement amplified linear damper assembly with rotation damper for reducing seismic energy |
| KR20130029506A (en) * | 2011-09-15 | 2013-03-25 | 씨엠알기술연구원(주) | Reciprocating friction damper and earthquake energy dissipation system |
| KR20130093964A (en) * | 2012-02-15 | 2013-08-23 | 주식회사 에이브이티 | Complex friction damper |
| WO2017090824A1 (en) * | 2015-11-27 | 2017-06-01 | 인천대학교 산학협력단 | Energy dissipation-type elastomer friction damper |
| CN108468392A (en) * | 2018-04-10 | 2018-08-31 | 同济大学 | Rotation Self-resetting energy-consuming device |
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
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